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authorSebastian Huber <sebastian.huber@embedded-brains.de>2013-10-09 22:42:09 +0200
committerSebastian Huber <sebastian.huber@embedded-brains.de>2013-10-10 09:06:58 +0200
commitbceabc95c1c85d793200446fa85f1ddc6313ea29 (patch)
tree973c8bd8deca9fd69913f2895cc91e0e6114d46c /freebsd/sys/netinet/sctp_output.c
parentAdd FreeBSD sources as a submodule (diff)
downloadrtems-libbsd-bceabc95c1c85d793200446fa85f1ddc6313ea29.tar.bz2
Move files to match FreeBSD layout
Diffstat (limited to 'freebsd/sys/netinet/sctp_output.c')
-rw-r--r--freebsd/sys/netinet/sctp_output.c13539
1 files changed, 13539 insertions, 0 deletions
diff --git a/freebsd/sys/netinet/sctp_output.c b/freebsd/sys/netinet/sctp_output.c
new file mode 100644
index 00000000..9acd3288
--- /dev/null
+++ b/freebsd/sys/netinet/sctp_output.c
@@ -0,0 +1,13539 @@
+#include <freebsd/machine/rtems-bsd-config.h>
+
+/*-
+ * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * a) Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * b) Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the distribution.
+ *
+ * c) Neither the name of Cisco Systems, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/* $KAME: sctp_output.c,v 1.46 2005/03/06 16:04:17 itojun Exp $ */
+
+#include <freebsd/sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <freebsd/netinet/sctp_os.h>
+#include <freebsd/sys/proc.h>
+#include <freebsd/netinet/sctp_var.h>
+#include <freebsd/netinet/sctp_sysctl.h>
+#include <freebsd/netinet/sctp_header.h>
+#include <freebsd/netinet/sctp_pcb.h>
+#include <freebsd/netinet/sctputil.h>
+#include <freebsd/netinet/sctp_output.h>
+#include <freebsd/netinet/sctp_uio.h>
+#include <freebsd/netinet/sctputil.h>
+#include <freebsd/netinet/sctp_auth.h>
+#include <freebsd/netinet/sctp_timer.h>
+#include <freebsd/netinet/sctp_asconf.h>
+#include <freebsd/netinet/sctp_indata.h>
+#include <freebsd/netinet/sctp_bsd_addr.h>
+#include <freebsd/netinet/sctp_input.h>
+#include <freebsd/netinet/sctp_crc32.h>
+#include <freebsd/netinet/udp.h>
+#include <freebsd/machine/in_cksum.h>
+
+
+
+#define SCTP_MAX_GAPS_INARRAY 4
+struct sack_track {
+ uint8_t right_edge; /* mergable on the right edge */
+ uint8_t left_edge; /* mergable on the left edge */
+ uint8_t num_entries;
+ uint8_t spare;
+ struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY];
+};
+
+struct sack_track sack_array[256] = {
+ {0, 0, 0, 0, /* 0x00 */
+ {{0, 0},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 1, 0, /* 0x01 */
+ {{0, 0},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 1, 0, /* 0x02 */
+ {{1, 1},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 1, 0, /* 0x03 */
+ {{0, 1},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 1, 0, /* 0x04 */
+ {{2, 2},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x05 */
+ {{0, 0},
+ {2, 2},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 1, 0, /* 0x06 */
+ {{1, 2},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 1, 0, /* 0x07 */
+ {{0, 2},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 1, 0, /* 0x08 */
+ {{3, 3},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x09 */
+ {{0, 0},
+ {3, 3},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x0a */
+ {{1, 1},
+ {3, 3},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x0b */
+ {{0, 1},
+ {3, 3},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 1, 0, /* 0x0c */
+ {{2, 3},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x0d */
+ {{0, 0},
+ {2, 3},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 1, 0, /* 0x0e */
+ {{1, 3},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 1, 0, /* 0x0f */
+ {{0, 3},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 1, 0, /* 0x10 */
+ {{4, 4},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x11 */
+ {{0, 0},
+ {4, 4},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x12 */
+ {{1, 1},
+ {4, 4},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x13 */
+ {{0, 1},
+ {4, 4},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x14 */
+ {{2, 2},
+ {4, 4},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 3, 0, /* 0x15 */
+ {{0, 0},
+ {2, 2},
+ {4, 4},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x16 */
+ {{1, 2},
+ {4, 4},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x17 */
+ {{0, 2},
+ {4, 4},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 1, 0, /* 0x18 */
+ {{3, 4},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x19 */
+ {{0, 0},
+ {3, 4},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x1a */
+ {{1, 1},
+ {3, 4},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x1b */
+ {{0, 1},
+ {3, 4},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 1, 0, /* 0x1c */
+ {{2, 4},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x1d */
+ {{0, 0},
+ {2, 4},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 1, 0, /* 0x1e */
+ {{1, 4},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 1, 0, /* 0x1f */
+ {{0, 4},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 1, 0, /* 0x20 */
+ {{5, 5},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x21 */
+ {{0, 0},
+ {5, 5},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x22 */
+ {{1, 1},
+ {5, 5},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x23 */
+ {{0, 1},
+ {5, 5},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x24 */
+ {{2, 2},
+ {5, 5},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 3, 0, /* 0x25 */
+ {{0, 0},
+ {2, 2},
+ {5, 5},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x26 */
+ {{1, 2},
+ {5, 5},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x27 */
+ {{0, 2},
+ {5, 5},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x28 */
+ {{3, 3},
+ {5, 5},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 3, 0, /* 0x29 */
+ {{0, 0},
+ {3, 3},
+ {5, 5},
+ {0, 0}
+ }
+ },
+ {0, 0, 3, 0, /* 0x2a */
+ {{1, 1},
+ {3, 3},
+ {5, 5},
+ {0, 0}
+ }
+ },
+ {1, 0, 3, 0, /* 0x2b */
+ {{0, 1},
+ {3, 3},
+ {5, 5},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x2c */
+ {{2, 3},
+ {5, 5},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 3, 0, /* 0x2d */
+ {{0, 0},
+ {2, 3},
+ {5, 5},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x2e */
+ {{1, 3},
+ {5, 5},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x2f */
+ {{0, 3},
+ {5, 5},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 1, 0, /* 0x30 */
+ {{4, 5},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x31 */
+ {{0, 0},
+ {4, 5},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x32 */
+ {{1, 1},
+ {4, 5},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x33 */
+ {{0, 1},
+ {4, 5},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x34 */
+ {{2, 2},
+ {4, 5},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 3, 0, /* 0x35 */
+ {{0, 0},
+ {2, 2},
+ {4, 5},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x36 */
+ {{1, 2},
+ {4, 5},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x37 */
+ {{0, 2},
+ {4, 5},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 1, 0, /* 0x38 */
+ {{3, 5},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x39 */
+ {{0, 0},
+ {3, 5},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x3a */
+ {{1, 1},
+ {3, 5},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x3b */
+ {{0, 1},
+ {3, 5},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 1, 0, /* 0x3c */
+ {{2, 5},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x3d */
+ {{0, 0},
+ {2, 5},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 1, 0, /* 0x3e */
+ {{1, 5},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 1, 0, /* 0x3f */
+ {{0, 5},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 1, 0, /* 0x40 */
+ {{6, 6},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x41 */
+ {{0, 0},
+ {6, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x42 */
+ {{1, 1},
+ {6, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x43 */
+ {{0, 1},
+ {6, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x44 */
+ {{2, 2},
+ {6, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 3, 0, /* 0x45 */
+ {{0, 0},
+ {2, 2},
+ {6, 6},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x46 */
+ {{1, 2},
+ {6, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x47 */
+ {{0, 2},
+ {6, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x48 */
+ {{3, 3},
+ {6, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 3, 0, /* 0x49 */
+ {{0, 0},
+ {3, 3},
+ {6, 6},
+ {0, 0}
+ }
+ },
+ {0, 0, 3, 0, /* 0x4a */
+ {{1, 1},
+ {3, 3},
+ {6, 6},
+ {0, 0}
+ }
+ },
+ {1, 0, 3, 0, /* 0x4b */
+ {{0, 1},
+ {3, 3},
+ {6, 6},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x4c */
+ {{2, 3},
+ {6, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 3, 0, /* 0x4d */
+ {{0, 0},
+ {2, 3},
+ {6, 6},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x4e */
+ {{1, 3},
+ {6, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x4f */
+ {{0, 3},
+ {6, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x50 */
+ {{4, 4},
+ {6, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 3, 0, /* 0x51 */
+ {{0, 0},
+ {4, 4},
+ {6, 6},
+ {0, 0}
+ }
+ },
+ {0, 0, 3, 0, /* 0x52 */
+ {{1, 1},
+ {4, 4},
+ {6, 6},
+ {0, 0}
+ }
+ },
+ {1, 0, 3, 0, /* 0x53 */
+ {{0, 1},
+ {4, 4},
+ {6, 6},
+ {0, 0}
+ }
+ },
+ {0, 0, 3, 0, /* 0x54 */
+ {{2, 2},
+ {4, 4},
+ {6, 6},
+ {0, 0}
+ }
+ },
+ {1, 0, 4, 0, /* 0x55 */
+ {{0, 0},
+ {2, 2},
+ {4, 4},
+ {6, 6}
+ }
+ },
+ {0, 0, 3, 0, /* 0x56 */
+ {{1, 2},
+ {4, 4},
+ {6, 6},
+ {0, 0}
+ }
+ },
+ {1, 0, 3, 0, /* 0x57 */
+ {{0, 2},
+ {4, 4},
+ {6, 6},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x58 */
+ {{3, 4},
+ {6, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 3, 0, /* 0x59 */
+ {{0, 0},
+ {3, 4},
+ {6, 6},
+ {0, 0}
+ }
+ },
+ {0, 0, 3, 0, /* 0x5a */
+ {{1, 1},
+ {3, 4},
+ {6, 6},
+ {0, 0}
+ }
+ },
+ {1, 0, 3, 0, /* 0x5b */
+ {{0, 1},
+ {3, 4},
+ {6, 6},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x5c */
+ {{2, 4},
+ {6, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 3, 0, /* 0x5d */
+ {{0, 0},
+ {2, 4},
+ {6, 6},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x5e */
+ {{1, 4},
+ {6, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x5f */
+ {{0, 4},
+ {6, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 1, 0, /* 0x60 */
+ {{5, 6},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x61 */
+ {{0, 0},
+ {5, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x62 */
+ {{1, 1},
+ {5, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x63 */
+ {{0, 1},
+ {5, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x64 */
+ {{2, 2},
+ {5, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 3, 0, /* 0x65 */
+ {{0, 0},
+ {2, 2},
+ {5, 6},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x66 */
+ {{1, 2},
+ {5, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x67 */
+ {{0, 2},
+ {5, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x68 */
+ {{3, 3},
+ {5, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 3, 0, /* 0x69 */
+ {{0, 0},
+ {3, 3},
+ {5, 6},
+ {0, 0}
+ }
+ },
+ {0, 0, 3, 0, /* 0x6a */
+ {{1, 1},
+ {3, 3},
+ {5, 6},
+ {0, 0}
+ }
+ },
+ {1, 0, 3, 0, /* 0x6b */
+ {{0, 1},
+ {3, 3},
+ {5, 6},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x6c */
+ {{2, 3},
+ {5, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 3, 0, /* 0x6d */
+ {{0, 0},
+ {2, 3},
+ {5, 6},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x6e */
+ {{1, 3},
+ {5, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x6f */
+ {{0, 3},
+ {5, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 1, 0, /* 0x70 */
+ {{4, 6},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x71 */
+ {{0, 0},
+ {4, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x72 */
+ {{1, 1},
+ {4, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x73 */
+ {{0, 1},
+ {4, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x74 */
+ {{2, 2},
+ {4, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 3, 0, /* 0x75 */
+ {{0, 0},
+ {2, 2},
+ {4, 6},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x76 */
+ {{1, 2},
+ {4, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x77 */
+ {{0, 2},
+ {4, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 1, 0, /* 0x78 */
+ {{3, 6},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x79 */
+ {{0, 0},
+ {3, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 2, 0, /* 0x7a */
+ {{1, 1},
+ {3, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x7b */
+ {{0, 1},
+ {3, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 1, 0, /* 0x7c */
+ {{2, 6},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 2, 0, /* 0x7d */
+ {{0, 0},
+ {2, 6},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 0, 1, 0, /* 0x7e */
+ {{1, 6},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 0, 1, 0, /* 0x7f */
+ {{0, 6},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 1, 0, /* 0x80 */
+ {{7, 7},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 2, 0, /* 0x81 */
+ {{0, 0},
+ {7, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0x82 */
+ {{1, 1},
+ {7, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 2, 0, /* 0x83 */
+ {{0, 1},
+ {7, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0x84 */
+ {{2, 2},
+ {7, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0x85 */
+ {{0, 0},
+ {2, 2},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0x86 */
+ {{1, 2},
+ {7, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 2, 0, /* 0x87 */
+ {{0, 2},
+ {7, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0x88 */
+ {{3, 3},
+ {7, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0x89 */
+ {{0, 0},
+ {3, 3},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 3, 0, /* 0x8a */
+ {{1, 1},
+ {3, 3},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0x8b */
+ {{0, 1},
+ {3, 3},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0x8c */
+ {{2, 3},
+ {7, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0x8d */
+ {{0, 0},
+ {2, 3},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0x8e */
+ {{1, 3},
+ {7, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 2, 0, /* 0x8f */
+ {{0, 3},
+ {7, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0x90 */
+ {{4, 4},
+ {7, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0x91 */
+ {{0, 0},
+ {4, 4},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 3, 0, /* 0x92 */
+ {{1, 1},
+ {4, 4},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0x93 */
+ {{0, 1},
+ {4, 4},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 3, 0, /* 0x94 */
+ {{2, 2},
+ {4, 4},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {1, 1, 4, 0, /* 0x95 */
+ {{0, 0},
+ {2, 2},
+ {4, 4},
+ {7, 7}
+ }
+ },
+ {0, 1, 3, 0, /* 0x96 */
+ {{1, 2},
+ {4, 4},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0x97 */
+ {{0, 2},
+ {4, 4},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0x98 */
+ {{3, 4},
+ {7, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0x99 */
+ {{0, 0},
+ {3, 4},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 3, 0, /* 0x9a */
+ {{1, 1},
+ {3, 4},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0x9b */
+ {{0, 1},
+ {3, 4},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0x9c */
+ {{2, 4},
+ {7, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0x9d */
+ {{0, 0},
+ {2, 4},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0x9e */
+ {{1, 4},
+ {7, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 2, 0, /* 0x9f */
+ {{0, 4},
+ {7, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xa0 */
+ {{5, 5},
+ {7, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xa1 */
+ {{0, 0},
+ {5, 5},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 3, 0, /* 0xa2 */
+ {{1, 1},
+ {5, 5},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xa3 */
+ {{0, 1},
+ {5, 5},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 3, 0, /* 0xa4 */
+ {{2, 2},
+ {5, 5},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {1, 1, 4, 0, /* 0xa5 */
+ {{0, 0},
+ {2, 2},
+ {5, 5},
+ {7, 7}
+ }
+ },
+ {0, 1, 3, 0, /* 0xa6 */
+ {{1, 2},
+ {5, 5},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xa7 */
+ {{0, 2},
+ {5, 5},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 3, 0, /* 0xa8 */
+ {{3, 3},
+ {5, 5},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {1, 1, 4, 0, /* 0xa9 */
+ {{0, 0},
+ {3, 3},
+ {5, 5},
+ {7, 7}
+ }
+ },
+ {0, 1, 4, 0, /* 0xaa */
+ {{1, 1},
+ {3, 3},
+ {5, 5},
+ {7, 7}
+ }
+ },
+ {1, 1, 4, 0, /* 0xab */
+ {{0, 1},
+ {3, 3},
+ {5, 5},
+ {7, 7}
+ }
+ },
+ {0, 1, 3, 0, /* 0xac */
+ {{2, 3},
+ {5, 5},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {1, 1, 4, 0, /* 0xad */
+ {{0, 0},
+ {2, 3},
+ {5, 5},
+ {7, 7}
+ }
+ },
+ {0, 1, 3, 0, /* 0xae */
+ {{1, 3},
+ {5, 5},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xaf */
+ {{0, 3},
+ {5, 5},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xb0 */
+ {{4, 5},
+ {7, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xb1 */
+ {{0, 0},
+ {4, 5},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 3, 0, /* 0xb2 */
+ {{1, 1},
+ {4, 5},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xb3 */
+ {{0, 1},
+ {4, 5},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 3, 0, /* 0xb4 */
+ {{2, 2},
+ {4, 5},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {1, 1, 4, 0, /* 0xb5 */
+ {{0, 0},
+ {2, 2},
+ {4, 5},
+ {7, 7}
+ }
+ },
+ {0, 1, 3, 0, /* 0xb6 */
+ {{1, 2},
+ {4, 5},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xb7 */
+ {{0, 2},
+ {4, 5},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xb8 */
+ {{3, 5},
+ {7, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xb9 */
+ {{0, 0},
+ {3, 5},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 3, 0, /* 0xba */
+ {{1, 1},
+ {3, 5},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xbb */
+ {{0, 1},
+ {3, 5},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xbc */
+ {{2, 5},
+ {7, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xbd */
+ {{0, 0},
+ {2, 5},
+ {7, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xbe */
+ {{1, 5},
+ {7, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 2, 0, /* 0xbf */
+ {{0, 5},
+ {7, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 1, 0, /* 0xc0 */
+ {{6, 7},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 2, 0, /* 0xc1 */
+ {{0, 0},
+ {6, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xc2 */
+ {{1, 1},
+ {6, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 2, 0, /* 0xc3 */
+ {{0, 1},
+ {6, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xc4 */
+ {{2, 2},
+ {6, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xc5 */
+ {{0, 0},
+ {2, 2},
+ {6, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xc6 */
+ {{1, 2},
+ {6, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 2, 0, /* 0xc7 */
+ {{0, 2},
+ {6, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xc8 */
+ {{3, 3},
+ {6, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xc9 */
+ {{0, 0},
+ {3, 3},
+ {6, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 3, 0, /* 0xca */
+ {{1, 1},
+ {3, 3},
+ {6, 7},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xcb */
+ {{0, 1},
+ {3, 3},
+ {6, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xcc */
+ {{2, 3},
+ {6, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xcd */
+ {{0, 0},
+ {2, 3},
+ {6, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xce */
+ {{1, 3},
+ {6, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 2, 0, /* 0xcf */
+ {{0, 3},
+ {6, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xd0 */
+ {{4, 4},
+ {6, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xd1 */
+ {{0, 0},
+ {4, 4},
+ {6, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 3, 0, /* 0xd2 */
+ {{1, 1},
+ {4, 4},
+ {6, 7},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xd3 */
+ {{0, 1},
+ {4, 4},
+ {6, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 3, 0, /* 0xd4 */
+ {{2, 2},
+ {4, 4},
+ {6, 7},
+ {0, 0}
+ }
+ },
+ {1, 1, 4, 0, /* 0xd5 */
+ {{0, 0},
+ {2, 2},
+ {4, 4},
+ {6, 7}
+ }
+ },
+ {0, 1, 3, 0, /* 0xd6 */
+ {{1, 2},
+ {4, 4},
+ {6, 7},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xd7 */
+ {{0, 2},
+ {4, 4},
+ {6, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xd8 */
+ {{3, 4},
+ {6, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xd9 */
+ {{0, 0},
+ {3, 4},
+ {6, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 3, 0, /* 0xda */
+ {{1, 1},
+ {3, 4},
+ {6, 7},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xdb */
+ {{0, 1},
+ {3, 4},
+ {6, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xdc */
+ {{2, 4},
+ {6, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xdd */
+ {{0, 0},
+ {2, 4},
+ {6, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xde */
+ {{1, 4},
+ {6, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 2, 0, /* 0xdf */
+ {{0, 4},
+ {6, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 1, 0, /* 0xe0 */
+ {{5, 7},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 2, 0, /* 0xe1 */
+ {{0, 0},
+ {5, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xe2 */
+ {{1, 1},
+ {5, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 2, 0, /* 0xe3 */
+ {{0, 1},
+ {5, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xe4 */
+ {{2, 2},
+ {5, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xe5 */
+ {{0, 0},
+ {2, 2},
+ {5, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xe6 */
+ {{1, 2},
+ {5, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 2, 0, /* 0xe7 */
+ {{0, 2},
+ {5, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xe8 */
+ {{3, 3},
+ {5, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xe9 */
+ {{0, 0},
+ {3, 3},
+ {5, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 3, 0, /* 0xea */
+ {{1, 1},
+ {3, 3},
+ {5, 7},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xeb */
+ {{0, 1},
+ {3, 3},
+ {5, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xec */
+ {{2, 3},
+ {5, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xed */
+ {{0, 0},
+ {2, 3},
+ {5, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xee */
+ {{1, 3},
+ {5, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 2, 0, /* 0xef */
+ {{0, 3},
+ {5, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 1, 0, /* 0xf0 */
+ {{4, 7},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 2, 0, /* 0xf1 */
+ {{0, 0},
+ {4, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xf2 */
+ {{1, 1},
+ {4, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 2, 0, /* 0xf3 */
+ {{0, 1},
+ {4, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xf4 */
+ {{2, 2},
+ {4, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 3, 0, /* 0xf5 */
+ {{0, 0},
+ {2, 2},
+ {4, 7},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xf6 */
+ {{1, 2},
+ {4, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 2, 0, /* 0xf7 */
+ {{0, 2},
+ {4, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 1, 0, /* 0xf8 */
+ {{3, 7},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 2, 0, /* 0xf9 */
+ {{0, 0},
+ {3, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 2, 0, /* 0xfa */
+ {{1, 1},
+ {3, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 2, 0, /* 0xfb */
+ {{0, 1},
+ {3, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 1, 0, /* 0xfc */
+ {{2, 7},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 2, 0, /* 0xfd */
+ {{0, 0},
+ {2, 7},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {0, 1, 1, 0, /* 0xfe */
+ {{1, 7},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ },
+ {1, 1, 1, 0, /* 0xff */
+ {{0, 7},
+ {0, 0},
+ {0, 0},
+ {0, 0}
+ }
+ }
+};
+
+
+int
+sctp_is_address_in_scope(struct sctp_ifa *ifa,
+ int ipv4_addr_legal,
+ int ipv6_addr_legal,
+ int loopback_scope,
+ int ipv4_local_scope,
+ int local_scope,
+ int site_scope,
+ int do_update)
+{
+ if ((loopback_scope == 0) &&
+ (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) {
+ /*
+ * skip loopback if not in scope *
+ */
+ return (0);
+ }
+ switch (ifa->address.sa.sa_family) {
+ case AF_INET:
+ if (ipv4_addr_legal) {
+ struct sockaddr_in *sin;
+
+ sin = (struct sockaddr_in *)&ifa->address.sin;
+ if (sin->sin_addr.s_addr == 0) {
+ /* not in scope , unspecified */
+ return (0);
+ }
+ if ((ipv4_local_scope == 0) &&
+ (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
+ /* private address not in scope */
+ return (0);
+ }
+ } else {
+ return (0);
+ }
+ break;
+#ifdef INET6
+ case AF_INET6:
+ if (ipv6_addr_legal) {
+ struct sockaddr_in6 *sin6;
+
+ /*
+ * Must update the flags, bummer, which means any
+ * IFA locks must now be applied HERE <->
+ */
+ if (do_update) {
+ sctp_gather_internal_ifa_flags(ifa);
+ }
+ if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
+ return (0);
+ }
+ /* ok to use deprecated addresses? */
+ sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
+ if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
+ /* skip unspecifed addresses */
+ return (0);
+ }
+ if ( /* (local_scope == 0) && */
+ (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
+ return (0);
+ }
+ if ((site_scope == 0) &&
+ (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
+ return (0);
+ }
+ } else {
+ return (0);
+ }
+ break;
+#endif
+ default:
+ return (0);
+ }
+ return (1);
+}
+
+static struct mbuf *
+sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa)
+{
+ struct sctp_paramhdr *parmh;
+ struct mbuf *mret;
+ int len;
+
+ if (ifa->address.sa.sa_family == AF_INET) {
+ len = sizeof(struct sctp_ipv4addr_param);
+ } else if (ifa->address.sa.sa_family == AF_INET6) {
+ len = sizeof(struct sctp_ipv6addr_param);
+ } else {
+ /* unknown type */
+ return (m);
+ }
+ if (M_TRAILINGSPACE(m) >= len) {
+ /* easy side we just drop it on the end */
+ parmh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m)));
+ mret = m;
+ } else {
+ /* Need more space */
+ mret = m;
+ while (SCTP_BUF_NEXT(mret) != NULL) {
+ mret = SCTP_BUF_NEXT(mret);
+ }
+ SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(len, 0, M_DONTWAIT, 1, MT_DATA);
+ if (SCTP_BUF_NEXT(mret) == NULL) {
+ /* We are hosed, can't add more addresses */
+ return (m);
+ }
+ mret = SCTP_BUF_NEXT(mret);
+ parmh = mtod(mret, struct sctp_paramhdr *);
+ }
+ /* now add the parameter */
+ switch (ifa->address.sa.sa_family) {
+ case AF_INET:
+ {
+ struct sctp_ipv4addr_param *ipv4p;
+ struct sockaddr_in *sin;
+
+ sin = (struct sockaddr_in *)&ifa->address.sin;
+ ipv4p = (struct sctp_ipv4addr_param *)parmh;
+ parmh->param_type = htons(SCTP_IPV4_ADDRESS);
+ parmh->param_length = htons(len);
+ ipv4p->addr = sin->sin_addr.s_addr;
+ SCTP_BUF_LEN(mret) += len;
+ break;
+ }
+#ifdef INET6
+ case AF_INET6:
+ {
+ struct sctp_ipv6addr_param *ipv6p;
+ struct sockaddr_in6 *sin6;
+
+ sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
+ ipv6p = (struct sctp_ipv6addr_param *)parmh;
+ parmh->param_type = htons(SCTP_IPV6_ADDRESS);
+ parmh->param_length = htons(len);
+ memcpy(ipv6p->addr, &sin6->sin6_addr,
+ sizeof(ipv6p->addr));
+ /* clear embedded scope in the address */
+ in6_clearscope((struct in6_addr *)ipv6p->addr);
+ SCTP_BUF_LEN(mret) += len;
+ break;
+ }
+#endif
+ default:
+ return (m);
+ }
+ return (mret);
+}
+
+
+struct mbuf *
+sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_scoping *scope,
+ struct mbuf *m_at, int cnt_inits_to)
+{
+ struct sctp_vrf *vrf = NULL;
+ int cnt, limit_out = 0, total_count;
+ uint32_t vrf_id;
+
+ vrf_id = inp->def_vrf_id;
+ SCTP_IPI_ADDR_RLOCK();
+ vrf = sctp_find_vrf(vrf_id);
+ if (vrf == NULL) {
+ SCTP_IPI_ADDR_RUNLOCK();
+ return (m_at);
+ }
+ if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
+ struct sctp_ifa *sctp_ifap;
+ struct sctp_ifn *sctp_ifnp;
+
+ cnt = cnt_inits_to;
+ if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) {
+ limit_out = 1;
+ cnt = SCTP_ADDRESS_LIMIT;
+ goto skip_count;
+ }
+ LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
+ if ((scope->loopback_scope == 0) &&
+ SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
+ /*
+ * Skip loopback devices if loopback_scope
+ * not set
+ */
+ continue;
+ }
+ LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
+ if (sctp_is_address_in_scope(sctp_ifap,
+ scope->ipv4_addr_legal,
+ scope->ipv6_addr_legal,
+ scope->loopback_scope,
+ scope->ipv4_local_scope,
+ scope->local_scope,
+ scope->site_scope, 1) == 0) {
+ continue;
+ }
+ cnt++;
+ if (cnt > SCTP_ADDRESS_LIMIT) {
+ break;
+ }
+ }
+ if (cnt > SCTP_ADDRESS_LIMIT) {
+ break;
+ }
+ }
+skip_count:
+ if (cnt > 1) {
+ total_count = 0;
+ LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
+ cnt = 0;
+ if ((scope->loopback_scope == 0) &&
+ SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
+ /*
+ * Skip loopback devices if
+ * loopback_scope not set
+ */
+ continue;
+ }
+ LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
+ if (sctp_is_address_in_scope(sctp_ifap,
+ scope->ipv4_addr_legal,
+ scope->ipv6_addr_legal,
+ scope->loopback_scope,
+ scope->ipv4_local_scope,
+ scope->local_scope,
+ scope->site_scope, 0) == 0) {
+ continue;
+ }
+ m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap);
+ if (limit_out) {
+ cnt++;
+ total_count++;
+ if (cnt >= 2) {
+ /*
+ * two from each
+ * address
+ */
+ break;
+ }
+ if (total_count > SCTP_ADDRESS_LIMIT) {
+ /* No more addresses */
+ break;
+ }
+ }
+ }
+ }
+ }
+ } else {
+ struct sctp_laddr *laddr;
+
+ cnt = cnt_inits_to;
+ /* First, how many ? */
+ LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
+ if (laddr->ifa == NULL) {
+ continue;
+ }
+ if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
+ /*
+ * Address being deleted by the system, dont
+ * list.
+ */
+ continue;
+ if (laddr->action == SCTP_DEL_IP_ADDRESS) {
+ /*
+ * Address being deleted on this ep don't
+ * list.
+ */
+ continue;
+ }
+ if (sctp_is_address_in_scope(laddr->ifa,
+ scope->ipv4_addr_legal,
+ scope->ipv6_addr_legal,
+ scope->loopback_scope,
+ scope->ipv4_local_scope,
+ scope->local_scope,
+ scope->site_scope, 1) == 0) {
+ continue;
+ }
+ cnt++;
+ }
+ if (cnt > SCTP_ADDRESS_LIMIT) {
+ limit_out = 1;
+ }
+ /*
+ * To get through a NAT we only list addresses if we have
+ * more than one. That way if you just bind a single address
+ * we let the source of the init dictate our address.
+ */
+ if (cnt > 1) {
+ LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
+ cnt = 0;
+ if (laddr->ifa == NULL) {
+ continue;
+ }
+ if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
+ continue;
+
+ if (sctp_is_address_in_scope(laddr->ifa,
+ scope->ipv4_addr_legal,
+ scope->ipv6_addr_legal,
+ scope->loopback_scope,
+ scope->ipv4_local_scope,
+ scope->local_scope,
+ scope->site_scope, 0) == 0) {
+ continue;
+ }
+ m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa);
+ cnt++;
+ if (cnt >= SCTP_ADDRESS_LIMIT) {
+ break;
+ }
+ }
+ }
+ }
+ SCTP_IPI_ADDR_RUNLOCK();
+ return (m_at);
+}
+
+static struct sctp_ifa *
+sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa,
+ uint8_t dest_is_loop,
+ uint8_t dest_is_priv,
+ sa_family_t fam)
+{
+ uint8_t dest_is_global = 0;
+
+ /* dest_is_priv is true if destination is a private address */
+ /* dest_is_loop is true if destination is a loopback addresses */
+
+ /**
+ * Here we determine if its a preferred address. A preferred address
+ * means it is the same scope or higher scope then the destination.
+ * L = loopback, P = private, G = global
+ * -----------------------------------------
+ * src | dest | result
+ * ----------------------------------------
+ * L | L | yes
+ * -----------------------------------------
+ * P | L | yes-v4 no-v6
+ * -----------------------------------------
+ * G | L | yes-v4 no-v6
+ * -----------------------------------------
+ * L | P | no
+ * -----------------------------------------
+ * P | P | yes
+ * -----------------------------------------
+ * G | P | no
+ * -----------------------------------------
+ * L | G | no
+ * -----------------------------------------
+ * P | G | no
+ * -----------------------------------------
+ * G | G | yes
+ * -----------------------------------------
+ */
+
+ if (ifa->address.sa.sa_family != fam) {
+ /* forget mis-matched family */
+ return (NULL);
+ }
+ if ((dest_is_priv == 0) && (dest_is_loop == 0)) {
+ dest_is_global = 1;
+ }
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:");
+ SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa);
+ /* Ok the address may be ok */
+ if (fam == AF_INET6) {
+ /* ok to use deprecated addresses? no lets not! */
+ if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n");
+ return (NULL);
+ }
+ if (ifa->src_is_priv && !ifa->src_is_loop) {
+ if (dest_is_loop) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n");
+ return (NULL);
+ }
+ }
+ if (ifa->src_is_glob) {
+ if (dest_is_loop) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n");
+ return (NULL);
+ }
+ }
+ }
+ /*
+ * Now that we know what is what, implement or table this could in
+ * theory be done slicker (it used to be), but this is
+ * straightforward and easier to validate :-)
+ */
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n",
+ ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob);
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n",
+ dest_is_loop, dest_is_priv, dest_is_global);
+
+ if ((ifa->src_is_loop) && (dest_is_priv)) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n");
+ return (NULL);
+ }
+ if ((ifa->src_is_glob) && (dest_is_priv)) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n");
+ return (NULL);
+ }
+ if ((ifa->src_is_loop) && (dest_is_global)) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n");
+ return (NULL);
+ }
+ if ((ifa->src_is_priv) && (dest_is_global)) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n");
+ return (NULL);
+ }
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n");
+ /* its a preferred address */
+ return (ifa);
+}
+
+static struct sctp_ifa *
+sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa,
+ uint8_t dest_is_loop,
+ uint8_t dest_is_priv,
+ sa_family_t fam)
+{
+ uint8_t dest_is_global = 0;
+
+ /*
+ * Here we determine if its a acceptable address. A acceptable
+ * address means it is the same scope or higher scope but we can
+ * allow for NAT which means its ok to have a global dest and a
+ * private src.
+ *
+ * L = loopback, P = private, G = global
+ * ----------------------------------------- src | dest | result
+ * ----------------------------------------- L | L | yes
+ * ----------------------------------------- P | L |
+ * yes-v4 no-v6 ----------------------------------------- G |
+ * L | yes ----------------------------------------- L |
+ * P | no ----------------------------------------- P | P
+ * | yes ----------------------------------------- G | P
+ * | yes - May not work -----------------------------------------
+ * L | G | no ----------------------------------------- P
+ * | G | yes - May not work
+ * ----------------------------------------- G | G | yes
+ * -----------------------------------------
+ */
+
+ if (ifa->address.sa.sa_family != fam) {
+ /* forget non matching family */
+ return (NULL);
+ }
+ /* Ok the address may be ok */
+ if ((dest_is_loop == 0) && (dest_is_priv == 0)) {
+ dest_is_global = 1;
+ }
+ if (fam == AF_INET6) {
+ /* ok to use deprecated addresses? */
+ if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
+ return (NULL);
+ }
+ if (ifa->src_is_priv) {
+ /* Special case, linklocal to loop */
+ if (dest_is_loop)
+ return (NULL);
+ }
+ }
+ /*
+ * Now that we know what is what, implement our table. This could in
+ * theory be done slicker (it used to be), but this is
+ * straightforward and easier to validate :-)
+ */
+ if ((ifa->src_is_loop == 1) && (dest_is_priv)) {
+ return (NULL);
+ }
+ if ((ifa->src_is_loop == 1) && (dest_is_global)) {
+ return (NULL);
+ }
+ /* its an acceptable address */
+ return (ifa);
+}
+
+int
+sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
+{
+ struct sctp_laddr *laddr;
+
+ if (stcb == NULL) {
+ /* There are no restrictions, no TCB :-) */
+ return (0);
+ }
+ LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
+ if (laddr->ifa == NULL) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
+ __FUNCTION__);
+ continue;
+ }
+ if (laddr->ifa == ifa) {
+ /* Yes it is on the list */
+ return (1);
+ }
+ }
+ return (0);
+}
+
+
+int
+sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
+{
+ struct sctp_laddr *laddr;
+
+ if (ifa == NULL)
+ return (0);
+ LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
+ if (laddr->ifa == NULL) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
+ __FUNCTION__);
+ continue;
+ }
+ if ((laddr->ifa == ifa) && laddr->action == 0)
+ /* same pointer */
+ return (1);
+ }
+ return (0);
+}
+
+
+
+static struct sctp_ifa *
+sctp_choose_boundspecific_inp(struct sctp_inpcb *inp,
+ sctp_route_t * ro,
+ uint32_t vrf_id,
+ int non_asoc_addr_ok,
+ uint8_t dest_is_priv,
+ uint8_t dest_is_loop,
+ sa_family_t fam)
+{
+ struct sctp_laddr *laddr, *starting_point;
+ void *ifn;
+ int resettotop = 0;
+ struct sctp_ifn *sctp_ifn;
+ struct sctp_ifa *sctp_ifa, *sifa;
+ struct sctp_vrf *vrf;
+ uint32_t ifn_index;
+
+ vrf = sctp_find_vrf(vrf_id);
+ if (vrf == NULL)
+ return (NULL);
+
+ ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
+ ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
+ sctp_ifn = sctp_find_ifn(ifn, ifn_index);
+ /*
+ * first question, is the ifn we will emit on in our list, if so, we
+ * want such an address. Note that we first looked for a preferred
+ * address.
+ */
+ if (sctp_ifn) {
+ /* is a preferred one on the interface we route out? */
+ LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
+ if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
+ (non_asoc_addr_ok == 0))
+ continue;
+ sifa = sctp_is_ifa_addr_preferred(sctp_ifa,
+ dest_is_loop,
+ dest_is_priv, fam);
+ if (sifa == NULL)
+ continue;
+ if (sctp_is_addr_in_ep(inp, sifa)) {
+ atomic_add_int(&sifa->refcount, 1);
+ return (sifa);
+ }
+ }
+ }
+ /*
+ * ok, now we now need to find one on the list of the addresses. We
+ * can't get one on the emitting interface so let's find first a
+ * preferred one. If not that an acceptable one otherwise... we
+ * return NULL.
+ */
+ starting_point = inp->next_addr_touse;
+once_again:
+ if (inp->next_addr_touse == NULL) {
+ inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
+ resettotop = 1;
+ }
+ for (laddr = inp->next_addr_touse; laddr;
+ laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
+ if (laddr->ifa == NULL) {
+ /* address has been removed */
+ continue;
+ }
+ if (laddr->action == SCTP_DEL_IP_ADDRESS) {
+ /* address is being deleted */
+ continue;
+ }
+ sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop,
+ dest_is_priv, fam);
+ if (sifa == NULL)
+ continue;
+ atomic_add_int(&sifa->refcount, 1);
+ return (sifa);
+ }
+ if (resettotop == 0) {
+ inp->next_addr_touse = NULL;
+ goto once_again;
+ }
+ inp->next_addr_touse = starting_point;
+ resettotop = 0;
+once_again_too:
+ if (inp->next_addr_touse == NULL) {
+ inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
+ resettotop = 1;
+ }
+ /* ok, what about an acceptable address in the inp */
+ for (laddr = inp->next_addr_touse; laddr;
+ laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
+ if (laddr->ifa == NULL) {
+ /* address has been removed */
+ continue;
+ }
+ if (laddr->action == SCTP_DEL_IP_ADDRESS) {
+ /* address is being deleted */
+ continue;
+ }
+ sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
+ dest_is_priv, fam);
+ if (sifa == NULL)
+ continue;
+ atomic_add_int(&sifa->refcount, 1);
+ return (sifa);
+ }
+ if (resettotop == 0) {
+ inp->next_addr_touse = NULL;
+ goto once_again_too;
+ }
+ /*
+ * no address bound can be a source for the destination we are in
+ * trouble
+ */
+ return (NULL);
+}
+
+
+
+static struct sctp_ifa *
+sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
+ struct sctp_tcb *stcb,
+ struct sctp_nets *net,
+ sctp_route_t * ro,
+ uint32_t vrf_id,
+ uint8_t dest_is_priv,
+ uint8_t dest_is_loop,
+ int non_asoc_addr_ok,
+ sa_family_t fam)
+{
+ struct sctp_laddr *laddr, *starting_point;
+ void *ifn;
+ struct sctp_ifn *sctp_ifn;
+ struct sctp_ifa *sctp_ifa, *sifa;
+ uint8_t start_at_beginning = 0;
+ struct sctp_vrf *vrf;
+ uint32_t ifn_index;
+
+ /*
+ * first question, is the ifn we will emit on in our list, if so, we
+ * want that one.
+ */
+ vrf = sctp_find_vrf(vrf_id);
+ if (vrf == NULL)
+ return (NULL);
+
+ ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
+ ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
+ sctp_ifn = sctp_find_ifn(ifn, ifn_index);
+
+ /*
+ * first question, is the ifn we will emit on in our list? If so,
+ * we want that one. First we look for a preferred. Second, we go
+ * for an acceptable.
+ */
+ if (sctp_ifn) {
+ /* first try for a preferred address on the ep */
+ LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
+ if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
+ continue;
+ if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
+ sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
+ if (sifa == NULL)
+ continue;
+ if (((non_asoc_addr_ok == 0) &&
+ (sctp_is_addr_restricted(stcb, sifa))) ||
+ (non_asoc_addr_ok &&
+ (sctp_is_addr_restricted(stcb, sifa)) &&
+ (!sctp_is_addr_pending(stcb, sifa)))) {
+ /* on the no-no list */
+ continue;
+ }
+ atomic_add_int(&sifa->refcount, 1);
+ return (sifa);
+ }
+ }
+ /* next try for an acceptable address on the ep */
+ LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
+ if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
+ continue;
+ if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
+ sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam);
+ if (sifa == NULL)
+ continue;
+ if (((non_asoc_addr_ok == 0) &&
+ (sctp_is_addr_restricted(stcb, sifa))) ||
+ (non_asoc_addr_ok &&
+ (sctp_is_addr_restricted(stcb, sifa)) &&
+ (!sctp_is_addr_pending(stcb, sifa)))) {
+ /* on the no-no list */
+ continue;
+ }
+ atomic_add_int(&sifa->refcount, 1);
+ return (sifa);
+ }
+ }
+
+ }
+ /*
+ * if we can't find one like that then we must look at all addresses
+ * bound to pick one at first preferable then secondly acceptable.
+ */
+ starting_point = stcb->asoc.last_used_address;
+sctp_from_the_top:
+ if (stcb->asoc.last_used_address == NULL) {
+ start_at_beginning = 1;
+ stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
+ }
+ /* search beginning with the last used address */
+ for (laddr = stcb->asoc.last_used_address; laddr;
+ laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
+ if (laddr->ifa == NULL) {
+ /* address has been removed */
+ continue;
+ }
+ if (laddr->action == SCTP_DEL_IP_ADDRESS) {
+ /* address is being deleted */
+ continue;
+ }
+ sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
+ if (sifa == NULL)
+ continue;
+ if (((non_asoc_addr_ok == 0) &&
+ (sctp_is_addr_restricted(stcb, sifa))) ||
+ (non_asoc_addr_ok &&
+ (sctp_is_addr_restricted(stcb, sifa)) &&
+ (!sctp_is_addr_pending(stcb, sifa)))) {
+ /* on the no-no list */
+ continue;
+ }
+ stcb->asoc.last_used_address = laddr;
+ atomic_add_int(&sifa->refcount, 1);
+ return (sifa);
+ }
+ if (start_at_beginning == 0) {
+ stcb->asoc.last_used_address = NULL;
+ goto sctp_from_the_top;
+ }
+ /* now try for any higher scope than the destination */
+ stcb->asoc.last_used_address = starting_point;
+ start_at_beginning = 0;
+sctp_from_the_top2:
+ if (stcb->asoc.last_used_address == NULL) {
+ start_at_beginning = 1;
+ stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
+ }
+ /* search beginning with the last used address */
+ for (laddr = stcb->asoc.last_used_address; laddr;
+ laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
+ if (laddr->ifa == NULL) {
+ /* address has been removed */
+ continue;
+ }
+ if (laddr->action == SCTP_DEL_IP_ADDRESS) {
+ /* address is being deleted */
+ continue;
+ }
+ sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
+ dest_is_priv, fam);
+ if (sifa == NULL)
+ continue;
+ if (((non_asoc_addr_ok == 0) &&
+ (sctp_is_addr_restricted(stcb, sifa))) ||
+ (non_asoc_addr_ok &&
+ (sctp_is_addr_restricted(stcb, sifa)) &&
+ (!sctp_is_addr_pending(stcb, sifa)))) {
+ /* on the no-no list */
+ continue;
+ }
+ stcb->asoc.last_used_address = laddr;
+ atomic_add_int(&sifa->refcount, 1);
+ return (sifa);
+ }
+ if (start_at_beginning == 0) {
+ stcb->asoc.last_used_address = NULL;
+ goto sctp_from_the_top2;
+ }
+ return (NULL);
+}
+
+static struct sctp_ifa *
+sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
+ struct sctp_tcb *stcb,
+ int non_asoc_addr_ok,
+ uint8_t dest_is_loop,
+ uint8_t dest_is_priv,
+ int addr_wanted,
+ sa_family_t fam,
+ sctp_route_t * ro
+)
+{
+ struct sctp_ifa *ifa, *sifa;
+ int num_eligible_addr = 0;
+
+#ifdef INET6
+ struct sockaddr_in6 sin6, lsa6;
+
+ if (fam == AF_INET6) {
+ memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
+ (void)sa6_recoverscope(&sin6);
+ }
+#endif /* INET6 */
+ LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
+ if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
+ (non_asoc_addr_ok == 0))
+ continue;
+ sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
+ dest_is_priv, fam);
+ if (sifa == NULL)
+ continue;
+#ifdef INET6
+ if (fam == AF_INET6 &&
+ dest_is_loop &&
+ sifa->src_is_loop && sifa->src_is_priv) {
+ /*
+ * don't allow fe80::1 to be a src on loop ::1, we
+ * don't list it to the peer so we will get an
+ * abort.
+ */
+ continue;
+ }
+ if (fam == AF_INET6 &&
+ IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
+ IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
+ /*
+ * link-local <-> link-local must belong to the same
+ * scope.
+ */
+ memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
+ (void)sa6_recoverscope(&lsa6);
+ if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
+ continue;
+ }
+ }
+#endif /* INET6 */
+
+ /*
+ * Check if the IPv6 address matches to next-hop. In the
+ * mobile case, old IPv6 address may be not deleted from the
+ * interface. Then, the interface has previous and new
+ * addresses. We should use one corresponding to the
+ * next-hop. (by micchie)
+ */
+#ifdef INET6
+ if (stcb && fam == AF_INET6 &&
+ sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
+ if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
+ == 0) {
+ continue;
+ }
+ }
+#endif
+ /* Avoid topologically incorrect IPv4 address */
+ if (stcb && fam == AF_INET &&
+ sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
+ if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
+ continue;
+ }
+ }
+ if (stcb) {
+ if (sctp_is_address_in_scope(ifa,
+ stcb->asoc.ipv4_addr_legal,
+ stcb->asoc.ipv6_addr_legal,
+ stcb->asoc.loopback_scope,
+ stcb->asoc.ipv4_local_scope,
+ stcb->asoc.local_scope,
+ stcb->asoc.site_scope, 0) == 0) {
+ continue;
+ }
+ if (((non_asoc_addr_ok == 0) &&
+ (sctp_is_addr_restricted(stcb, sifa))) ||
+ (non_asoc_addr_ok &&
+ (sctp_is_addr_restricted(stcb, sifa)) &&
+ (!sctp_is_addr_pending(stcb, sifa)))) {
+ /*
+ * It is restricted for some reason..
+ * probably not yet added.
+ */
+ continue;
+ }
+ }
+ if (num_eligible_addr >= addr_wanted) {
+ return (sifa);
+ }
+ num_eligible_addr++;
+ }
+ return (NULL);
+}
+
+
+static int
+sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
+ struct sctp_tcb *stcb,
+ int non_asoc_addr_ok,
+ uint8_t dest_is_loop,
+ uint8_t dest_is_priv,
+ sa_family_t fam)
+{
+ struct sctp_ifa *ifa, *sifa;
+ int num_eligible_addr = 0;
+
+ LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
+ if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
+ (non_asoc_addr_ok == 0)) {
+ continue;
+ }
+ sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
+ dest_is_priv, fam);
+ if (sifa == NULL) {
+ continue;
+ }
+ if (stcb) {
+ if (sctp_is_address_in_scope(ifa,
+ stcb->asoc.ipv4_addr_legal,
+ stcb->asoc.ipv6_addr_legal,
+ stcb->asoc.loopback_scope,
+ stcb->asoc.ipv4_local_scope,
+ stcb->asoc.local_scope,
+ stcb->asoc.site_scope, 0) == 0) {
+ continue;
+ }
+ if (((non_asoc_addr_ok == 0) &&
+ (sctp_is_addr_restricted(stcb, sifa))) ||
+ (non_asoc_addr_ok &&
+ (sctp_is_addr_restricted(stcb, sifa)) &&
+ (!sctp_is_addr_pending(stcb, sifa)))) {
+ /*
+ * It is restricted for some reason..
+ * probably not yet added.
+ */
+ continue;
+ }
+ }
+ num_eligible_addr++;
+ }
+ return (num_eligible_addr);
+}
+
+static struct sctp_ifa *
+sctp_choose_boundall(struct sctp_inpcb *inp,
+ struct sctp_tcb *stcb,
+ struct sctp_nets *net,
+ sctp_route_t * ro,
+ uint32_t vrf_id,
+ uint8_t dest_is_priv,
+ uint8_t dest_is_loop,
+ int non_asoc_addr_ok,
+ sa_family_t fam)
+{
+ int cur_addr_num = 0, num_preferred = 0;
+ void *ifn;
+ struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
+ struct sctp_ifa *sctp_ifa, *sifa;
+ uint32_t ifn_index;
+ struct sctp_vrf *vrf;
+
+ /*-
+ * For boundall we can use any address in the association.
+ * If non_asoc_addr_ok is set we can use any address (at least in
+ * theory). So we look for preferred addresses first. If we find one,
+ * we use it. Otherwise we next try to get an address on the
+ * interface, which we should be able to do (unless non_asoc_addr_ok
+ * is false and we are routed out that way). In these cases where we
+ * can't use the address of the interface we go through all the
+ * ifn's looking for an address we can use and fill that in. Punting
+ * means we send back address 0, which will probably cause problems
+ * actually since then IP will fill in the address of the route ifn,
+ * which means we probably already rejected it.. i.e. here comes an
+ * abort :-<.
+ */
+ vrf = sctp_find_vrf(vrf_id);
+ if (vrf == NULL)
+ return (NULL);
+
+ ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
+ ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
+ emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
+ if (sctp_ifn == NULL) {
+ /* ?? We don't have this guy ?? */
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n");
+ goto bound_all_plan_b;
+ }
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n",
+ ifn_index, sctp_ifn->ifn_name);
+
+ if (net) {
+ cur_addr_num = net->indx_of_eligible_next_to_use;
+ }
+ num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
+ stcb,
+ non_asoc_addr_ok,
+ dest_is_loop,
+ dest_is_priv, fam);
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
+ num_preferred, sctp_ifn->ifn_name);
+ if (num_preferred == 0) {
+ /*
+ * no eligible addresses, we must use some other interface
+ * address if we can find one.
+ */
+ goto bound_all_plan_b;
+ }
+ /*
+ * Ok we have num_eligible_addr set with how many we can use, this
+ * may vary from call to call due to addresses being deprecated
+ * etc..
+ */
+ if (cur_addr_num >= num_preferred) {
+ cur_addr_num = 0;
+ }
+ /*
+ * select the nth address from the list (where cur_addr_num is the
+ * nth) and 0 is the first one, 1 is the second one etc...
+ */
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
+
+ sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop,
+ dest_is_priv, cur_addr_num, fam, ro);
+
+ /* if sctp_ifa is NULL something changed??, fall to plan b. */
+ if (sctp_ifa) {
+ atomic_add_int(&sctp_ifa->refcount, 1);
+ if (net) {
+ /* save off where the next one we will want */
+ net->indx_of_eligible_next_to_use = cur_addr_num + 1;
+ }
+ return (sctp_ifa);
+ }
+ /*
+ * plan_b: Look at all interfaces and find a preferred address. If
+ * no preferred fall through to plan_c.
+ */
+bound_all_plan_b:
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
+ LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
+ sctp_ifn->ifn_name);
+ if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
+ /* wrong base scope */
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
+ continue;
+ }
+ if ((sctp_ifn == looked_at) && looked_at) {
+ /* already looked at this guy */
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
+ continue;
+ }
+ num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, stcb, non_asoc_addr_ok,
+ dest_is_loop, dest_is_priv, fam);
+ SCTPDBG(SCTP_DEBUG_OUTPUT2,
+ "Found ifn:%p %d preferred source addresses\n",
+ ifn, num_preferred);
+ if (num_preferred == 0) {
+ /* None on this interface. */
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefered -- skipping to next\n");
+ continue;
+ }
+ SCTPDBG(SCTP_DEBUG_OUTPUT2,
+ "num preferred:%d on interface:%p cur_addr_num:%d\n",
+ num_preferred, sctp_ifn, cur_addr_num);
+
+ /*
+ * Ok we have num_eligible_addr set with how many we can
+ * use, this may vary from call to call due to addresses
+ * being deprecated etc..
+ */
+ if (cur_addr_num >= num_preferred) {
+ cur_addr_num = 0;
+ }
+ sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop,
+ dest_is_priv, cur_addr_num, fam, ro);
+ if (sifa == NULL)
+ continue;
+ if (net) {
+ net->indx_of_eligible_next_to_use = cur_addr_num + 1;
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
+ cur_addr_num);
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
+ SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
+ SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
+ }
+ atomic_add_int(&sifa->refcount, 1);
+ return (sifa);
+
+ }
+
+ /* plan_c: do we have an acceptable address on the emit interface */
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n");
+ if (emit_ifn == NULL) {
+ goto plan_d;
+ }
+ LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
+ if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
+ (non_asoc_addr_ok == 0))
+ continue;
+ sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
+ dest_is_priv, fam);
+ if (sifa == NULL)
+ continue;
+ if (stcb) {
+ if (sctp_is_address_in_scope(sifa,
+ stcb->asoc.ipv4_addr_legal,
+ stcb->asoc.ipv6_addr_legal,
+ stcb->asoc.loopback_scope,
+ stcb->asoc.ipv4_local_scope,
+ stcb->asoc.local_scope,
+ stcb->asoc.site_scope, 0) == 0) {
+ continue;
+ }
+ if (((non_asoc_addr_ok == 0) &&
+ (sctp_is_addr_restricted(stcb, sifa))) ||
+ (non_asoc_addr_ok &&
+ (sctp_is_addr_restricted(stcb, sifa)) &&
+ (!sctp_is_addr_pending(stcb, sifa)))) {
+ /*
+ * It is restricted for some reason..
+ * probably not yet added.
+ */
+ continue;
+ }
+ }
+ atomic_add_int(&sifa->refcount, 1);
+ return (sifa);
+ }
+plan_d:
+ /*
+ * plan_d: We are in trouble. No preferred address on the emit
+ * interface. And not even a preferred address on all interfaces. Go
+ * out and see if we can find an acceptable address somewhere
+ * amongst all interfaces.
+ */
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D\n");
+ LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
+ if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
+ /* wrong base scope */
+ continue;
+ }
+ if ((sctp_ifn == looked_at) && looked_at)
+ /* already looked at this guy */
+ continue;
+
+ LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
+ if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
+ (non_asoc_addr_ok == 0))
+ continue;
+ sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
+ dest_is_loop,
+ dest_is_priv, fam);
+ if (sifa == NULL)
+ continue;
+ if (stcb) {
+ if (sctp_is_address_in_scope(sifa,
+ stcb->asoc.ipv4_addr_legal,
+ stcb->asoc.ipv6_addr_legal,
+ stcb->asoc.loopback_scope,
+ stcb->asoc.ipv4_local_scope,
+ stcb->asoc.local_scope,
+ stcb->asoc.site_scope, 0) == 0) {
+ continue;
+ }
+ if (((non_asoc_addr_ok == 0) &&
+ (sctp_is_addr_restricted(stcb, sifa))) ||
+ (non_asoc_addr_ok &&
+ (sctp_is_addr_restricted(stcb, sifa)) &&
+ (!sctp_is_addr_pending(stcb, sifa)))) {
+ /*
+ * It is restricted for some
+ * reason.. probably not yet added.
+ */
+ continue;
+ }
+ }
+ atomic_add_int(&sifa->refcount, 1);
+ return (sifa);
+ }
+ }
+ /*
+ * Ok we can find NO address to source from that is not on our
+ * restricted list and non_asoc_address is NOT ok, or it is on our
+ * restricted list. We can't source to it :-(
+ */
+ return (NULL);
+}
+
+
+
+/* tcb may be NULL */
+struct sctp_ifa *
+sctp_source_address_selection(struct sctp_inpcb *inp,
+ struct sctp_tcb *stcb,
+ sctp_route_t * ro,
+ struct sctp_nets *net,
+ int non_asoc_addr_ok, uint32_t vrf_id)
+{
+ struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
+
+#ifdef INET6
+ struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
+
+#endif
+ struct sctp_ifa *answer;
+ uint8_t dest_is_priv, dest_is_loop;
+ sa_family_t fam;
+
+ /*-
+ * Rules: - Find the route if needed, cache if I can. - Look at
+ * interface address in route, Is it in the bound list. If so we
+ * have the best source. - If not we must rotate amongst the
+ * addresses.
+ *
+ * Cavets and issues
+ *
+ * Do we need to pay attention to scope. We can have a private address
+ * or a global address we are sourcing or sending to. So if we draw
+ * it out
+ * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
+ * For V4
+ * ------------------------------------------
+ * source * dest * result
+ * -----------------------------------------
+ * <a> Private * Global * NAT
+ * -----------------------------------------
+ * <b> Private * Private * No problem
+ * -----------------------------------------
+ * <c> Global * Private * Huh, How will this work?
+ * -----------------------------------------
+ * <d> Global * Global * No Problem
+ *------------------------------------------
+ * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
+ * For V6
+ *------------------------------------------
+ * source * dest * result
+ * -----------------------------------------
+ * <a> Linklocal * Global *
+ * -----------------------------------------
+ * <b> Linklocal * Linklocal * No problem
+ * -----------------------------------------
+ * <c> Global * Linklocal * Huh, How will this work?
+ * -----------------------------------------
+ * <d> Global * Global * No Problem
+ *------------------------------------------
+ * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
+ *
+ * And then we add to that what happens if there are multiple addresses
+ * assigned to an interface. Remember the ifa on a ifn is a linked
+ * list of addresses. So one interface can have more than one IP
+ * address. What happens if we have both a private and a global
+ * address? Do we then use context of destination to sort out which
+ * one is best? And what about NAT's sending P->G may get you a NAT
+ * translation, or should you select the G thats on the interface in
+ * preference.
+ *
+ * Decisions:
+ *
+ * - count the number of addresses on the interface.
+ * - if it is one, no problem except case <c>.
+ * For <a> we will assume a NAT out there.
+ * - if there are more than one, then we need to worry about scope P
+ * or G. We should prefer G -> G and P -> P if possible.
+ * Then as a secondary fall back to mixed types G->P being a last
+ * ditch one.
+ * - The above all works for bound all, but bound specific we need to
+ * use the same concept but instead only consider the bound
+ * addresses. If the bound set is NOT assigned to the interface then
+ * we must use rotation amongst the bound addresses..
+ */
+ if (ro->ro_rt == NULL) {
+ /*
+ * Need a route to cache.
+ */
+ SCTP_RTALLOC(ro, vrf_id);
+ }
+ if (ro->ro_rt == NULL) {
+ return (NULL);
+ }
+ fam = to->sin_family;
+ dest_is_priv = dest_is_loop = 0;
+ /* Setup our scopes for the destination */
+ switch (fam) {
+ case AF_INET:
+ /* Scope based on outbound address */
+ if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
+ dest_is_loop = 1;
+ if (net != NULL) {
+ /* mark it as local */
+ net->addr_is_local = 1;
+ }
+ } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
+ dest_is_priv = 1;
+ }
+ break;
+#ifdef INET6
+ case AF_INET6:
+ /* Scope based on outbound address */
+ if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
+ SCTP_ROUTE_IS_REAL_LOOP(ro)) {
+ /*
+ * If the address is a loopback address, which
+ * consists of "::1" OR "fe80::1%lo0", we are
+ * loopback scope. But we don't use dest_is_priv
+ * (link local addresses).
+ */
+ dest_is_loop = 1;
+ if (net != NULL) {
+ /* mark it as local */
+ net->addr_is_local = 1;
+ }
+ } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
+ dest_is_priv = 1;
+ }
+ break;
+#endif
+ }
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
+ SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)to);
+ SCTP_IPI_ADDR_RLOCK();
+ if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
+ /*
+ * Bound all case
+ */
+ answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id,
+ dest_is_priv, dest_is_loop,
+ non_asoc_addr_ok, fam);
+ SCTP_IPI_ADDR_RUNLOCK();
+ return (answer);
+ }
+ /*
+ * Subset bound case
+ */
+ if (stcb) {
+ answer = sctp_choose_boundspecific_stcb(inp, stcb, net, ro,
+ vrf_id, dest_is_priv,
+ dest_is_loop,
+ non_asoc_addr_ok, fam);
+ } else {
+ answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
+ non_asoc_addr_ok,
+ dest_is_priv,
+ dest_is_loop, fam);
+ }
+ SCTP_IPI_ADDR_RUNLOCK();
+ return (answer);
+}
+
+static int
+sctp_find_cmsg(int c_type, void *data, struct mbuf *control, int cpsize)
+{
+ struct cmsghdr cmh;
+ int tlen, at;
+
+ tlen = SCTP_BUF_LEN(control);
+ at = 0;
+ /*
+ * Independent of how many mbufs, find the c_type inside the control
+ * structure and copy out the data.
+ */
+ while (at < tlen) {
+ if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
+ /* not enough room for one more we are done. */
+ return (0);
+ }
+ m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
+ if (((int)cmh.cmsg_len + at) > tlen) {
+ /*
+ * this is real messed up since there is not enough
+ * data here to cover the cmsg header. We are done.
+ */
+ return (0);
+ }
+ if ((cmh.cmsg_level == IPPROTO_SCTP) &&
+ (c_type == cmh.cmsg_type)) {
+ /* found the one we want, copy it out */
+ at += CMSG_ALIGN(sizeof(struct cmsghdr));
+ if ((int)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < cpsize) {
+ /*
+ * space of cmsg_len after header not big
+ * enough
+ */
+ return (0);
+ }
+ m_copydata(control, at, cpsize, data);
+ return (1);
+ } else {
+ at += CMSG_ALIGN(cmh.cmsg_len);
+ if (cmh.cmsg_len == 0) {
+ break;
+ }
+ }
+ }
+ /* not found */
+ return (0);
+}
+
+static struct mbuf *
+sctp_add_cookie(struct sctp_inpcb *inp, struct mbuf *init, int init_offset,
+ struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature)
+{
+ struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
+ struct sctp_state_cookie *stc;
+ struct sctp_paramhdr *ph;
+ uint8_t *foo;
+ int sig_offset;
+ uint16_t cookie_sz;
+
+ mret = NULL;
+ mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
+ sizeof(struct sctp_paramhdr)), 0,
+ M_DONTWAIT, 1, MT_DATA);
+ if (mret == NULL) {
+ return (NULL);
+ }
+ copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_DONTWAIT);
+ if (copy_init == NULL) {
+ sctp_m_freem(mret);
+ return (NULL);
+ }
+#ifdef SCTP_MBUF_LOGGING
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
+ struct mbuf *mat;
+
+ mat = copy_init;
+ while (mat) {
+ if (SCTP_BUF_IS_EXTENDED(mat)) {
+ sctp_log_mb(mat, SCTP_MBUF_ICOPY);
+ }
+ mat = SCTP_BUF_NEXT(mat);
+ }
+ }
+#endif
+ copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
+ M_DONTWAIT);
+ if (copy_initack == NULL) {
+ sctp_m_freem(mret);
+ sctp_m_freem(copy_init);
+ return (NULL);
+ }
+#ifdef SCTP_MBUF_LOGGING
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
+ struct mbuf *mat;
+
+ mat = copy_initack;
+ while (mat) {
+ if (SCTP_BUF_IS_EXTENDED(mat)) {
+ sctp_log_mb(mat, SCTP_MBUF_ICOPY);
+ }
+ mat = SCTP_BUF_NEXT(mat);
+ }
+ }
+#endif
+ /* easy side we just drop it on the end */
+ ph = mtod(mret, struct sctp_paramhdr *);
+ SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
+ sizeof(struct sctp_paramhdr);
+ stc = (struct sctp_state_cookie *)((caddr_t)ph +
+ sizeof(struct sctp_paramhdr));
+ ph->param_type = htons(SCTP_STATE_COOKIE);
+ ph->param_length = 0; /* fill in at the end */
+ /* Fill in the stc cookie data */
+ memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
+
+ /* tack the INIT and then the INIT-ACK onto the chain */
+ cookie_sz = 0;
+ m_at = mret;
+ for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
+ cookie_sz += SCTP_BUF_LEN(m_at);
+ if (SCTP_BUF_NEXT(m_at) == NULL) {
+ SCTP_BUF_NEXT(m_at) = copy_init;
+ break;
+ }
+ }
+
+ for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
+ cookie_sz += SCTP_BUF_LEN(m_at);
+ if (SCTP_BUF_NEXT(m_at) == NULL) {
+ SCTP_BUF_NEXT(m_at) = copy_initack;
+ break;
+ }
+ }
+
+ for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
+ cookie_sz += SCTP_BUF_LEN(m_at);
+ if (SCTP_BUF_NEXT(m_at) == NULL) {
+ break;
+ }
+ }
+ sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_DONTWAIT, 1, MT_DATA);
+ if (sig == NULL) {
+ /* no space, so free the entire chain */
+ sctp_m_freem(mret);
+ return (NULL);
+ }
+ SCTP_BUF_LEN(sig) = 0;
+ SCTP_BUF_NEXT(m_at) = sig;
+ sig_offset = 0;
+ foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset);
+ memset(foo, 0, SCTP_SIGNATURE_SIZE);
+ *signature = foo;
+ SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
+ cookie_sz += SCTP_SIGNATURE_SIZE;
+ ph->param_length = htons(cookie_sz);
+ return (mret);
+}
+
+
+static uint8_t
+sctp_get_ect(struct sctp_tcb *stcb,
+ struct sctp_tmit_chunk *chk)
+{
+ uint8_t this_random;
+
+ /* Huh? */
+ if (SCTP_BASE_SYSCTL(sctp_ecn_enable) == 0)
+ return (0);
+
+ if (SCTP_BASE_SYSCTL(sctp_ecn_nonce) == 0)
+ /* no nonce, always return ECT0 */
+ return (SCTP_ECT0_BIT);
+
+ if (stcb->asoc.peer_supports_ecn_nonce == 0) {
+ /* Peer does NOT support it, so we send a ECT0 only */
+ return (SCTP_ECT0_BIT);
+ }
+ if (chk == NULL)
+ return (SCTP_ECT0_BIT);
+
+ if ((stcb->asoc.hb_random_idx > 3) ||
+ ((stcb->asoc.hb_random_idx == 3) &&
+ (stcb->asoc.hb_ect_randombit > 7))) {
+ uint32_t rndval;
+
+warp_drive_sa:
+ rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
+ memcpy(stcb->asoc.hb_random_values, &rndval,
+ sizeof(stcb->asoc.hb_random_values));
+ this_random = stcb->asoc.hb_random_values[0];
+ stcb->asoc.hb_random_idx = 0;
+ stcb->asoc.hb_ect_randombit = 0;
+ } else {
+ if (stcb->asoc.hb_ect_randombit > 7) {
+ stcb->asoc.hb_ect_randombit = 0;
+ stcb->asoc.hb_random_idx++;
+ if (stcb->asoc.hb_random_idx > 3) {
+ goto warp_drive_sa;
+ }
+ }
+ this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx];
+ }
+ if ((this_random >> stcb->asoc.hb_ect_randombit) & 0x01) {
+ if (chk != NULL)
+ /* ECN Nonce stuff */
+ chk->rec.data.ect_nonce = SCTP_ECT1_BIT;
+ stcb->asoc.hb_ect_randombit++;
+ return (SCTP_ECT1_BIT);
+ } else {
+ stcb->asoc.hb_ect_randombit++;
+ return (SCTP_ECT0_BIT);
+ }
+}
+
+static int
+sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
+ struct sctp_tcb *stcb, /* may be NULL */
+ struct sctp_nets *net,
+ struct sockaddr *to,
+ struct mbuf *m,
+ uint32_t auth_offset,
+ struct sctp_auth_chunk *auth,
+ uint16_t auth_keyid,
+ int nofragment_flag,
+ int ecn_ok,
+ struct sctp_tmit_chunk *chk,
+ int out_of_asoc_ok,
+ uint16_t src_port,
+ uint16_t dest_port,
+ uint32_t v_tag,
+ uint16_t port,
+ int so_locked,
+#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
+ SCTP_UNUSED
+#endif
+ union sctp_sockstore *over_addr
+)
+/* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
+{
+ /*
+ * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet
+ * header WITH an SCTPHDR but no IP header, endpoint inp and sa
+ * structure: - fill in the HMAC digest of any AUTH chunk in the
+ * packet. - calculate and fill in the SCTP checksum. - prepend an
+ * IP address header. - if boundall use INADDR_ANY. - if
+ * boundspecific do source address selection. - set fragmentation
+ * option for ipV4. - On return from IP output, check/adjust mtu
+ * size of output interface and smallest_mtu size as well.
+ */
+ /* Will need ifdefs around this */
+ struct mbuf *o_pak;
+ struct mbuf *newm;
+ struct sctphdr *sctphdr;
+ int packet_length;
+ int ret;
+ uint32_t vrf_id;
+ sctp_route_t *ro = NULL;
+ struct udphdr *udp = NULL;
+
+#if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
+ struct socket *so = NULL;
+
+#endif
+
+ if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
+ SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
+ sctp_m_freem(m);
+ return (EFAULT);
+ }
+ if (stcb) {
+ vrf_id = stcb->asoc.vrf_id;
+ } else {
+ vrf_id = inp->def_vrf_id;
+ }
+
+ /* fill in the HMAC digest for any AUTH chunk in the packet */
+ if ((auth != NULL) && (stcb != NULL)) {
+ sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
+ }
+ if (to->sa_family == AF_INET) {
+ struct ip *ip = NULL;
+ sctp_route_t iproute;
+ uint8_t tos_value;
+ int len;
+
+ len = sizeof(struct ip) + sizeof(struct sctphdr);
+ if (port) {
+ len += sizeof(struct udphdr);
+ }
+ newm = sctp_get_mbuf_for_msg(len, 1, M_DONTWAIT, 1, MT_DATA);
+ if (newm == NULL) {
+ sctp_m_freem(m);
+ SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+ return (ENOMEM);
+ }
+ SCTP_ALIGN_TO_END(newm, len);
+ SCTP_BUF_LEN(newm) = len;
+ SCTP_BUF_NEXT(newm) = m;
+ m = newm;
+ packet_length = sctp_calculate_len(m);
+ ip = mtod(m, struct ip *);
+ ip->ip_v = IPVERSION;
+ ip->ip_hl = (sizeof(struct ip) >> 2);
+ if (net) {
+ tos_value = net->tos_flowlabel & 0x000000ff;
+ } else {
+ tos_value = inp->ip_inp.inp.inp_ip_tos;
+ }
+ if ((nofragment_flag) && (port == 0)) {
+ ip->ip_off = IP_DF;
+ } else
+ ip->ip_off = 0;
+
+ /* FreeBSD has a function for ip_id's */
+ ip->ip_id = ip_newid();
+
+ ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
+ ip->ip_len = packet_length;
+ if (stcb) {
+ if ((stcb->asoc.ecn_allowed) && ecn_ok) {
+ /* Enable ECN */
+ ip->ip_tos = ((u_char)(tos_value & 0xfc) | sctp_get_ect(stcb, chk));
+ } else {
+ /* No ECN */
+ ip->ip_tos = (u_char)(tos_value & 0xfc);
+ }
+ } else {
+ /* no association at all */
+ ip->ip_tos = (tos_value & 0xfc);
+ }
+ if (port) {
+ ip->ip_p = IPPROTO_UDP;
+ } else {
+ ip->ip_p = IPPROTO_SCTP;
+ }
+ ip->ip_sum = 0;
+ if (net == NULL) {
+ ro = &iproute;
+ memset(&iproute, 0, sizeof(iproute));
+ memcpy(&ro->ro_dst, to, to->sa_len);
+ } else {
+ ro = (sctp_route_t *) & net->ro;
+ }
+ /* Now the address selection part */
+ ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
+
+ /* call the routine to select the src address */
+ if (net && out_of_asoc_ok == 0) {
+ if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
+ sctp_free_ifa(net->ro._s_addr);
+ net->ro._s_addr = NULL;
+ net->src_addr_selected = 0;
+ if (ro->ro_rt) {
+ RTFREE(ro->ro_rt);
+ ro->ro_rt = NULL;
+ }
+ }
+ if (net->src_addr_selected == 0) {
+ /* Cache the source address */
+ net->ro._s_addr = sctp_source_address_selection(inp, stcb,
+ ro, net, 0,
+ vrf_id);
+ net->src_addr_selected = 1;
+ }
+ if (net->ro._s_addr == NULL) {
+ /* No route to host */
+ net->src_addr_selected = 0;
+ goto no_route;
+ }
+ ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
+ } else {
+ if (over_addr == NULL) {
+ struct sctp_ifa *_lsrc;
+
+ _lsrc = sctp_source_address_selection(inp, stcb, ro,
+ net,
+ out_of_asoc_ok,
+ vrf_id);
+ if (_lsrc == NULL) {
+ goto no_route;
+ }
+ ip->ip_src = _lsrc->address.sin.sin_addr;
+ sctp_free_ifa(_lsrc);
+ } else {
+ ip->ip_src = over_addr->sin.sin_addr;
+ SCTP_RTALLOC(ro, vrf_id);
+ }
+ }
+ if (port) {
+ udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
+ udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
+ udp->uh_dport = port;
+ udp->uh_ulen = htons(packet_length - sizeof(struct ip));
+ udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
+ sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
+ } else {
+ sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
+ }
+
+ sctphdr->src_port = src_port;
+ sctphdr->dest_port = dest_port;
+ sctphdr->v_tag = v_tag;
+ sctphdr->checksum = 0;
+
+ /*
+ * If source address selection fails and we find no route
+ * then the ip_output should fail as well with a
+ * NO_ROUTE_TO_HOST type error. We probably should catch
+ * that somewhere and abort the association right away
+ * (assuming this is an INIT being sent).
+ */
+ if ((ro->ro_rt == NULL)) {
+ /*
+ * src addr selection failed to find a route (or
+ * valid source addr), so we can't get there from
+ * here (yet)!
+ */
+ no_route:
+ SCTPDBG(SCTP_DEBUG_OUTPUT1,
+ "%s: dropped packet - no valid source addr\n",
+ __FUNCTION__);
+ if (net) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT1,
+ "Destination was ");
+ SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1,
+ &net->ro._l_addr.sa);
+ if (net->dest_state & SCTP_ADDR_CONFIRMED) {
+ if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", net);
+ sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
+ stcb,
+ SCTP_FAILED_THRESHOLD,
+ (void *)net,
+ so_locked);
+ net->dest_state &= ~SCTP_ADDR_REACHABLE;
+ net->dest_state |= SCTP_ADDR_NOT_REACHABLE;
+ /*
+ * JRS 5/14/07 - If a
+ * destination is
+ * unreachable, the PF bit
+ * is turned off. This
+ * allows an unambiguous use
+ * of the PF bit for
+ * destinations that are
+ * reachable but potentially
+ * failed. If the
+ * destination is set to the
+ * unreachable state, also
+ * set the destination to
+ * the PF state.
+ */
+ /*
+ * Add debug message here if
+ * destination is not in PF
+ * state.
+ */
+ /*
+ * Stop any running T3
+ * timers here?
+ */
+ if ((stcb->asoc.sctp_cmt_on_off == 1) &&
+ (stcb->asoc.sctp_cmt_pf > 0)) {
+ net->dest_state &= ~SCTP_ADDR_PF;
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination %p moved from PF to unreachable.\n",
+ net);
+ }
+ }
+ }
+ if (stcb) {
+ if (net == stcb->asoc.primary_destination) {
+ /* need a new primary */
+ struct sctp_nets *alt;
+
+ alt = sctp_find_alternate_net(stcb, net, 0);
+ if (alt != net) {
+ if (sctp_set_primary_addr(stcb,
+ (struct sockaddr *)NULL,
+ alt) == 0) {
+ net->dest_state |= SCTP_ADDR_WAS_PRIMARY;
+ if (net->ro._s_addr) {
+ sctp_free_ifa(net->ro._s_addr);
+ net->ro._s_addr = NULL;
+ }
+ net->src_addr_selected = 0;
+ }
+ }
+ }
+ }
+ }
+ SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
+ sctp_m_freem(m);
+ return (EHOSTUNREACH);
+ }
+ if (ro != &iproute) {
+ memcpy(&iproute, ro, sizeof(*ro));
+ }
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
+ (uint32_t) (ntohl(ip->ip_src.s_addr)));
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
+ (uint32_t) (ntohl(ip->ip_dst.s_addr)));
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
+ ro->ro_rt);
+
+ if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
+ /* failed to prepend data, give up */
+ SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+ sctp_m_freem(m);
+ return (ENOMEM);
+ }
+#ifdef SCTP_PACKET_LOGGING
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
+ sctp_packet_log(m, packet_length);
+#endif
+ SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
+ if (port) {
+#if defined(SCTP_WITH_NO_CSUM)
+ SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+ if (!(SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) &&
+ (stcb) &&
+ (stcb->asoc.loopback_scope))) {
+ sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
+ SCTP_STAT_INCR(sctps_sendswcrc);
+ } else {
+ SCTP_STAT_INCR(sctps_sendnocrc);
+ }
+#endif
+ SCTP_ENABLE_UDP_CSUM(o_pak);
+ } else {
+#if defined(SCTP_WITH_NO_CSUM)
+ SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+ m->m_pkthdr.csum_flags = CSUM_SCTP;
+ m->m_pkthdr.csum_data = 0;
+ SCTP_STAT_INCR(sctps_sendhwcrc);
+#endif
+ }
+ /* send it out. table id is taken from stcb */
+#if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
+ if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
+ so = SCTP_INP_SO(inp);
+ SCTP_SOCKET_UNLOCK(so, 0);
+ }
+#endif
+ SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
+#if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
+ if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
+ atomic_add_int(&stcb->asoc.refcnt, 1);
+ SCTP_TCB_UNLOCK(stcb);
+ SCTP_SOCKET_LOCK(so, 0);
+ SCTP_TCB_LOCK(stcb);
+ atomic_subtract_int(&stcb->asoc.refcnt, 1);
+ }
+#endif
+ SCTP_STAT_INCR(sctps_sendpackets);
+ SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
+ if (ret)
+ SCTP_STAT_INCR(sctps_senderrors);
+
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
+ if (net == NULL) {
+ /* free tempy routes */
+ if (ro->ro_rt) {
+ RTFREE(ro->ro_rt);
+ ro->ro_rt = NULL;
+ }
+ } else {
+ /* PMTU check versus smallest asoc MTU goes here */
+ if ((ro->ro_rt != NULL) &&
+ (net->ro._s_addr)) {
+ uint32_t mtu;
+
+ mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
+ if (net->port) {
+ mtu -= sizeof(struct udphdr);
+ }
+ if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
+ sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
+ net->mtu = mtu;
+ }
+ } else if (ro->ro_rt == NULL) {
+ /* route was freed */
+ if (net->ro._s_addr &&
+ net->src_addr_selected) {
+ sctp_free_ifa(net->ro._s_addr);
+ net->ro._s_addr = NULL;
+ }
+ net->src_addr_selected = 0;
+ }
+ }
+ return (ret);
+ }
+#ifdef INET6
+ else if (to->sa_family == AF_INET6) {
+ uint32_t flowlabel;
+ struct ip6_hdr *ip6h;
+ struct route_in6 ip6route;
+ struct ifnet *ifp;
+ u_char flowTop;
+ uint16_t flowBottom;
+ u_char tosBottom, tosTop;
+ struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
+ int prev_scope = 0;
+ struct sockaddr_in6 lsa6_storage;
+ int error;
+ u_short prev_port = 0;
+ int len;
+
+ if (net != NULL) {
+ flowlabel = net->tos_flowlabel;
+ } else {
+ flowlabel = ((struct in6pcb *)inp)->in6p_flowinfo;
+ }
+
+ len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr);
+ if (port) {
+ len += sizeof(struct udphdr);
+ }
+ newm = sctp_get_mbuf_for_msg(len, 1, M_DONTWAIT, 1, MT_DATA);
+ if (newm == NULL) {
+ sctp_m_freem(m);
+ SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+ return (ENOMEM);
+ }
+ SCTP_ALIGN_TO_END(newm, len);
+ SCTP_BUF_LEN(newm) = len;
+ SCTP_BUF_NEXT(newm) = m;
+ m = newm;
+ packet_length = sctp_calculate_len(m);
+
+ ip6h = mtod(m, struct ip6_hdr *);
+ /*
+ * We assume here that inp_flow is in host byte order within
+ * the TCB!
+ */
+ flowBottom = flowlabel & 0x0000ffff;
+ flowTop = ((flowlabel & 0x000f0000) >> 16);
+ tosTop = (((flowlabel & 0xf0) >> 4) | IPV6_VERSION);
+ /* protect *sin6 from overwrite */
+ sin6 = (struct sockaddr_in6 *)to;
+ tmp = *sin6;
+ sin6 = &tmp;
+
+ /* KAME hack: embed scopeid */
+ if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
+ SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ return (EINVAL);
+ }
+ if (net == NULL) {
+ memset(&ip6route, 0, sizeof(ip6route));
+ ro = (sctp_route_t *) & ip6route;
+ memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
+ } else {
+ ro = (sctp_route_t *) & net->ro;
+ }
+ if (stcb != NULL) {
+ if ((stcb->asoc.ecn_allowed) && ecn_ok) {
+ /* Enable ECN */
+ tosBottom = (((((struct in6pcb *)inp)->in6p_flowinfo & 0x0c) | sctp_get_ect(stcb, chk)) << 4);
+ } else {
+ /* No ECN */
+ tosBottom = ((((struct in6pcb *)inp)->in6p_flowinfo & 0x0c) << 4);
+ }
+ } else {
+ /* we could get no asoc if it is a O-O-T-B packet */
+ tosBottom = ((((struct in6pcb *)inp)->in6p_flowinfo & 0x0c) << 4);
+ }
+ ip6h->ip6_flow = htonl(((tosTop << 24) | ((tosBottom | flowTop) << 16) | flowBottom));
+ if (port) {
+ ip6h->ip6_nxt = IPPROTO_UDP;
+ } else {
+ ip6h->ip6_nxt = IPPROTO_SCTP;
+ }
+ ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr));
+ ip6h->ip6_dst = sin6->sin6_addr;
+
+ /*
+ * Add SRC address selection here: we can only reuse to a
+ * limited degree the kame src-addr-sel, since we can try
+ * their selection but it may not be bound.
+ */
+ bzero(&lsa6_tmp, sizeof(lsa6_tmp));
+ lsa6_tmp.sin6_family = AF_INET6;
+ lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
+ lsa6 = &lsa6_tmp;
+ if (net && out_of_asoc_ok == 0) {
+ if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
+ sctp_free_ifa(net->ro._s_addr);
+ net->ro._s_addr = NULL;
+ net->src_addr_selected = 0;
+ if (ro->ro_rt) {
+ RTFREE(ro->ro_rt);
+ ro->ro_rt = NULL;
+ }
+ }
+ if (net->src_addr_selected == 0) {
+ sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
+ /* KAME hack: embed scopeid */
+ if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
+ SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ return (EINVAL);
+ }
+ /* Cache the source address */
+ net->ro._s_addr = sctp_source_address_selection(inp,
+ stcb,
+ ro,
+ net,
+ 0,
+ vrf_id);
+ (void)sa6_recoverscope(sin6);
+ net->src_addr_selected = 1;
+ }
+ if (net->ro._s_addr == NULL) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
+ net->src_addr_selected = 0;
+ goto no_route;
+ }
+ lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
+ } else {
+ sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
+ /* KAME hack: embed scopeid */
+ if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
+ SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ return (EINVAL);
+ }
+ if (over_addr == NULL) {
+ struct sctp_ifa *_lsrc;
+
+ _lsrc = sctp_source_address_selection(inp, stcb, ro,
+ net,
+ out_of_asoc_ok,
+ vrf_id);
+ if (_lsrc == NULL) {
+ goto no_route;
+ }
+ lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
+ sctp_free_ifa(_lsrc);
+ } else {
+ lsa6->sin6_addr = over_addr->sin6.sin6_addr;
+ SCTP_RTALLOC(ro, vrf_id);
+ }
+ (void)sa6_recoverscope(sin6);
+ }
+ lsa6->sin6_port = inp->sctp_lport;
+
+ if (ro->ro_rt == NULL) {
+ /*
+ * src addr selection failed to find a route (or
+ * valid source addr), so we can't get there from
+ * here!
+ */
+ goto no_route;
+ }
+ /*
+ * XXX: sa6 may not have a valid sin6_scope_id in the
+ * non-SCOPEDROUTING case.
+ */
+ bzero(&lsa6_storage, sizeof(lsa6_storage));
+ lsa6_storage.sin6_family = AF_INET6;
+ lsa6_storage.sin6_len = sizeof(lsa6_storage);
+ lsa6_storage.sin6_addr = lsa6->sin6_addr;
+ if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
+ sctp_m_freem(m);
+ return (error);
+ }
+ /* XXX */
+ lsa6_storage.sin6_addr = lsa6->sin6_addr;
+ lsa6_storage.sin6_port = inp->sctp_lport;
+ lsa6 = &lsa6_storage;
+ ip6h->ip6_src = lsa6->sin6_addr;
+
+ if (port) {
+ udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
+ udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
+ udp->uh_dport = port;
+ udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr));
+ udp->uh_sum = 0;
+ sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
+ } else {
+ sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
+ }
+
+ sctphdr->src_port = src_port;
+ sctphdr->dest_port = dest_port;
+ sctphdr->v_tag = v_tag;
+ sctphdr->checksum = 0;
+
+ /*
+ * We set the hop limit now since there is a good chance
+ * that our ro pointer is now filled
+ */
+ ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
+ ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
+
+#ifdef SCTP_DEBUG
+ /* Copy to be sure something bad is not happening */
+ sin6->sin6_addr = ip6h->ip6_dst;
+ lsa6->sin6_addr = ip6h->ip6_src;
+#endif
+
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
+ SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
+ SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
+ if (net) {
+ sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
+ /* preserve the port and scope for link local send */
+ prev_scope = sin6->sin6_scope_id;
+ prev_port = sin6->sin6_port;
+ }
+ if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
+ /* failed to prepend data, give up */
+ sctp_m_freem(m);
+ SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+ return (ENOMEM);
+ }
+#ifdef SCTP_PACKET_LOGGING
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
+ sctp_packet_log(m, packet_length);
+#endif
+ SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
+ if (port) {
+#if defined(SCTP_WITH_NO_CSUM)
+ SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+ if (!(SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) &&
+ (stcb) &&
+ (stcb->asoc.loopback_scope))) {
+ sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
+ SCTP_STAT_INCR(sctps_sendswcrc);
+ } else {
+ SCTP_STAT_INCR(sctps_sendnocrc);
+ }
+#endif
+ if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
+ udp->uh_sum = 0xffff;
+ }
+ } else {
+#if defined(SCTP_WITH_NO_CSUM)
+ SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+ m->m_pkthdr.csum_flags = CSUM_SCTP;
+ m->m_pkthdr.csum_data = 0;
+ SCTP_STAT_INCR(sctps_sendhwcrc);
+#endif
+ }
+ /* send it out. table id is taken from stcb */
+#if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
+ if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
+ so = SCTP_INP_SO(inp);
+ SCTP_SOCKET_UNLOCK(so, 0);
+ }
+#endif
+ SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
+#if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
+ if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
+ atomic_add_int(&stcb->asoc.refcnt, 1);
+ SCTP_TCB_UNLOCK(stcb);
+ SCTP_SOCKET_LOCK(so, 0);
+ SCTP_TCB_LOCK(stcb);
+ atomic_subtract_int(&stcb->asoc.refcnt, 1);
+ }
+#endif
+ if (net) {
+ /* for link local this must be done */
+ sin6->sin6_scope_id = prev_scope;
+ sin6->sin6_port = prev_port;
+ }
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
+ SCTP_STAT_INCR(sctps_sendpackets);
+ SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
+ if (ret) {
+ SCTP_STAT_INCR(sctps_senderrors);
+ }
+ if (net == NULL) {
+ /* Now if we had a temp route free it */
+ if (ro->ro_rt) {
+ RTFREE(ro->ro_rt);
+ }
+ } else {
+ /* PMTU check versus smallest asoc MTU goes here */
+ if (ro->ro_rt == NULL) {
+ /* Route was freed */
+ if (net->ro._s_addr &&
+ net->src_addr_selected) {
+ sctp_free_ifa(net->ro._s_addr);
+ net->ro._s_addr = NULL;
+ }
+ net->src_addr_selected = 0;
+ }
+ if ((ro->ro_rt != NULL) &&
+ (net->ro._s_addr)) {
+ uint32_t mtu;
+
+ mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
+ if (mtu &&
+ (stcb->asoc.smallest_mtu > mtu)) {
+ sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
+ net->mtu = mtu;
+ if (net->port) {
+ net->mtu -= sizeof(struct udphdr);
+ }
+ }
+ } else if (ifp) {
+ if (ND_IFINFO(ifp)->linkmtu &&
+ (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
+ sctp_mtu_size_reset(inp,
+ &stcb->asoc,
+ ND_IFINFO(ifp)->linkmtu);
+ }
+ }
+ }
+ return (ret);
+ }
+#endif
+ else {
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
+ ((struct sockaddr *)to)->sa_family);
+ sctp_m_freem(m);
+ SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
+ return (EFAULT);
+ }
+}
+
+
+void
+sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
+#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
+ SCTP_UNUSED
+#endif
+)
+{
+ struct mbuf *m, *m_at, *mp_last;
+ struct sctp_nets *net;
+ struct sctp_init_chunk *init;
+ struct sctp_supported_addr_param *sup_addr;
+ struct sctp_adaptation_layer_indication *ali;
+ struct sctp_ecn_supported_param *ecn;
+ struct sctp_prsctp_supported_param *prsctp;
+ struct sctp_ecn_nonce_supported_param *ecn_nonce;
+ struct sctp_supported_chunk_types_param *pr_supported;
+ int cnt_inits_to = 0;
+ int padval, ret;
+ int num_ext;
+ int p_len;
+
+ /* INIT's always go to the primary (and usually ONLY address) */
+ mp_last = NULL;
+ net = stcb->asoc.primary_destination;
+ if (net == NULL) {
+ net = TAILQ_FIRST(&stcb->asoc.nets);
+ if (net == NULL) {
+ /* TSNH */
+ return;
+ }
+ /* we confirm any address we send an INIT to */
+ net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
+ (void)sctp_set_primary_addr(stcb, NULL, net);
+ } else {
+ /* we confirm any address we send an INIT to */
+ net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
+ }
+ SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
+#ifdef INET6
+ if (((struct sockaddr *)&(net->ro._l_addr))->sa_family == AF_INET6) {
+ /*
+ * special hook, if we are sending to link local it will not
+ * show up in our private address count.
+ */
+ struct sockaddr_in6 *sin6l;
+
+ sin6l = &net->ro._l_addr.sin6;
+ if (IN6_IS_ADDR_LINKLOCAL(&sin6l->sin6_addr))
+ cnt_inits_to = 1;
+ }
+#endif
+ if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
+ /* This case should not happen */
+ SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
+ return;
+ }
+ /* start the INIT timer */
+ sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
+
+ m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_DONTWAIT, 1, MT_DATA);
+ if (m == NULL) {
+ /* No memory, INIT timer will re-attempt. */
+ SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
+ return;
+ }
+ SCTP_BUF_LEN(m) = sizeof(struct sctp_init_chunk);
+ /*
+ * assume peer supports asconf in order to be able to queue local
+ * address changes while an INIT is in flight and before the assoc
+ * is established.
+ */
+ stcb->asoc.peer_supports_asconf = 1;
+ /* Now lets put the SCTP header in place */
+ init = mtod(m, struct sctp_init_chunk *);
+ /* now the chunk header */
+ init->ch.chunk_type = SCTP_INITIATION;
+ init->ch.chunk_flags = 0;
+ /* fill in later from mbuf we build */
+ init->ch.chunk_length = 0;
+ /* place in my tag */
+ init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
+ /* set up some of the credits. */
+ init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
+ SCTP_MINIMAL_RWND));
+
+ init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
+ init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
+ init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
+ /* now the address restriction */
+ sup_addr = (struct sctp_supported_addr_param *)((caddr_t)init +
+ sizeof(*init));
+ sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
+#ifdef INET6
+ /* we support 2 types: IPv6/IPv4 */
+ sup_addr->ph.param_length = htons(sizeof(*sup_addr) + sizeof(uint16_t));
+ sup_addr->addr_type[0] = htons(SCTP_IPV4_ADDRESS);
+ sup_addr->addr_type[1] = htons(SCTP_IPV6_ADDRESS);
+#else
+ /* we support 1 type: IPv4 */
+ sup_addr->ph.param_length = htons(sizeof(*sup_addr) + sizeof(uint8_t));
+ sup_addr->addr_type[0] = htons(SCTP_IPV4_ADDRESS);
+ sup_addr->addr_type[1] = htons(0); /* this is the padding */
+#endif
+ SCTP_BUF_LEN(m) += sizeof(*sup_addr) + sizeof(uint16_t);
+ /* adaptation layer indication parameter */
+ ali = (struct sctp_adaptation_layer_indication *)((caddr_t)sup_addr + sizeof(*sup_addr) + sizeof(uint16_t));
+ ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
+ ali->ph.param_length = htons(sizeof(*ali));
+ ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
+ SCTP_BUF_LEN(m) += sizeof(*ali);
+ ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali));
+
+ if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
+ /* Add NAT friendly parameter */
+ struct sctp_paramhdr *ph;
+
+ ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
+ ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
+ ph->param_length = htons(sizeof(struct sctp_paramhdr));
+ SCTP_BUF_LEN(m) += sizeof(struct sctp_paramhdr);
+ ecn = (struct sctp_ecn_supported_param *)((caddr_t)ph + sizeof(*ph));
+ }
+ /* now any cookie time extensions */
+ if (stcb->asoc.cookie_preserve_req) {
+ struct sctp_cookie_perserve_param *cookie_preserve;
+
+ cookie_preserve = (struct sctp_cookie_perserve_param *)(ecn);
+ cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
+ cookie_preserve->ph.param_length = htons(
+ sizeof(*cookie_preserve));
+ cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
+ SCTP_BUF_LEN(m) += sizeof(*cookie_preserve);
+ ecn = (struct sctp_ecn_supported_param *)(
+ (caddr_t)cookie_preserve + sizeof(*cookie_preserve));
+ stcb->asoc.cookie_preserve_req = 0;
+ }
+ /* ECN parameter */
+ if (SCTP_BASE_SYSCTL(sctp_ecn_enable) == 1) {
+ ecn->ph.param_type = htons(SCTP_ECN_CAPABLE);
+ ecn->ph.param_length = htons(sizeof(*ecn));
+ SCTP_BUF_LEN(m) += sizeof(*ecn);
+ prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn +
+ sizeof(*ecn));
+ } else {
+ prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn);
+ }
+ /* And now tell the peer we do pr-sctp */
+ prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED);
+ prsctp->ph.param_length = htons(sizeof(*prsctp));
+ SCTP_BUF_LEN(m) += sizeof(*prsctp);
+
+ /* And now tell the peer we do all the extensions */
+ pr_supported = (struct sctp_supported_chunk_types_param *)
+ ((caddr_t)prsctp + sizeof(*prsctp));
+ pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
+ num_ext = 0;
+ pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
+ pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
+ pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
+ pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
+ pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
+ if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
+ pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
+ }
+ if (stcb->asoc.sctp_nr_sack_on_off == 1) {
+ pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
+ }
+ p_len = sizeof(*pr_supported) + num_ext;
+ pr_supported->ph.param_length = htons(p_len);
+ bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len);
+ SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
+
+
+ /* ECN nonce: And now tell the peer we support ECN nonce */
+ if (SCTP_BASE_SYSCTL(sctp_ecn_nonce)) {
+ ecn_nonce = (struct sctp_ecn_nonce_supported_param *)
+ ((caddr_t)pr_supported + SCTP_SIZE32(p_len));
+ ecn_nonce->ph.param_type = htons(SCTP_ECN_NONCE_SUPPORTED);
+ ecn_nonce->ph.param_length = htons(sizeof(*ecn_nonce));
+ SCTP_BUF_LEN(m) += sizeof(*ecn_nonce);
+ }
+ /* add authentication parameters */
+ if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
+ struct sctp_auth_random *randp;
+ struct sctp_auth_hmac_algo *hmacs;
+ struct sctp_auth_chunk_list *chunks;
+
+ /* attach RANDOM parameter, if available */
+ if (stcb->asoc.authinfo.random != NULL) {
+ randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
+ p_len = sizeof(*randp) + stcb->asoc.authinfo.random_len;
+ /* random key already contains the header */
+ bcopy(stcb->asoc.authinfo.random->key, randp, p_len);
+ /* zero out any padding required */
+ bzero((caddr_t)randp + p_len, SCTP_SIZE32(p_len) - p_len);
+ SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
+ }
+ /* add HMAC_ALGO parameter */
+ hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
+ p_len = sctp_serialize_hmaclist(stcb->asoc.local_hmacs,
+ (uint8_t *) hmacs->hmac_ids);
+ if (p_len > 0) {
+ p_len += sizeof(*hmacs);
+ hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
+ hmacs->ph.param_length = htons(p_len);
+ /* zero out any padding required */
+ bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len);
+ SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
+ }
+ /* add CHUNKS parameter */
+ chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
+ p_len = sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks,
+ chunks->chunk_types);
+ if (p_len > 0) {
+ p_len += sizeof(*chunks);
+ chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
+ chunks->ph.param_length = htons(p_len);
+ /* zero out any padding required */
+ bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len);
+ SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
+ }
+ }
+ m_at = m;
+ /* now the addresses */
+ {
+ struct sctp_scoping scp;
+
+ /*
+ * To optimize this we could put the scoping stuff into a
+ * structure and remove the individual uint8's from the
+ * assoc structure. Then we could just sifa in the address
+ * within the stcb.. but for now this is a quick hack to get
+ * the address stuff teased apart.
+ */
+ scp.ipv4_addr_legal = stcb->asoc.ipv4_addr_legal;
+ scp.ipv6_addr_legal = stcb->asoc.ipv6_addr_legal;
+ scp.loopback_scope = stcb->asoc.loopback_scope;
+ scp.ipv4_local_scope = stcb->asoc.ipv4_local_scope;
+ scp.local_scope = stcb->asoc.local_scope;
+ scp.site_scope = stcb->asoc.site_scope;
+
+ m_at = sctp_add_addresses_to_i_ia(inp, &scp, m_at, cnt_inits_to);
+ }
+
+ /* calulate the size and update pkt header and chunk header */
+ p_len = 0;
+ for (m_at = m; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
+ if (SCTP_BUF_NEXT(m_at) == NULL)
+ mp_last = m_at;
+ p_len += SCTP_BUF_LEN(m_at);
+ }
+ init->ch.chunk_length = htons(p_len);
+ /*
+ * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
+ * here since the timer will drive a retranmission.
+ */
+
+ /* I don't expect this to execute but we will be safe here */
+ padval = p_len % 4;
+ if ((padval) && (mp_last)) {
+ /*
+ * The compiler worries that mp_last may not be set even
+ * though I think it is impossible :-> however we add
+ * mp_last here just in case.
+ */
+ ret = sctp_add_pad_tombuf(mp_last, (4 - padval));
+ if (ret) {
+ /* Houston we have a problem, no space */
+ sctp_m_freem(m);
+ return;
+ }
+ p_len += padval;
+ }
+ SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
+ ret = sctp_lowlevel_chunk_output(inp, stcb, net,
+ (struct sockaddr *)&net->ro._l_addr,
+ m, 0, NULL, 0, 0, 0, NULL, 0,
+ inp->sctp_lport, stcb->rport, htonl(0),
+ net->port, so_locked, NULL);
+ SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
+ SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+ (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
+}
+
+struct mbuf *
+sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
+ int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
+{
+ /*
+ * Given a mbuf containing an INIT or INIT-ACK with the param_offset
+ * being equal to the beginning of the params i.e. (iphlen +
+ * sizeof(struct sctp_init_msg) parse through the parameters to the
+ * end of the mbuf verifying that all parameters are known.
+ *
+ * For unknown parameters build and return a mbuf with
+ * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
+ * processing this chunk stop, and set *abort_processing to 1.
+ *
+ * By having param_offset be pre-set to where parameters begin it is
+ * hoped that this routine may be reused in the future by new
+ * features.
+ */
+ struct sctp_paramhdr *phdr, params;
+
+ struct mbuf *mat, *op_err;
+ char tempbuf[SCTP_PARAM_BUFFER_SIZE];
+ int at, limit, pad_needed;
+ uint16_t ptype, plen, padded_size;
+ int err_at;
+
+ *abort_processing = 0;
+ mat = in_initpkt;
+ err_at = 0;
+ limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
+ at = param_offset;
+ op_err = NULL;
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
+ phdr = sctp_get_next_param(mat, at, &params, sizeof(params));
+ while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
+ ptype = ntohs(phdr->param_type);
+ plen = ntohs(phdr->param_length);
+ if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
+ /* wacked parameter */
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
+ goto invalid_size;
+ }
+ limit -= SCTP_SIZE32(plen);
+ /*-
+ * All parameters for all chunks that we know/understand are
+ * listed here. We process them other places and make
+ * appropriate stop actions per the upper bits. However this
+ * is the generic routine processor's can call to get back
+ * an operr.. to either incorporate (init-ack) or send.
+ */
+ padded_size = SCTP_SIZE32(plen);
+ switch (ptype) {
+ /* Param's with variable size */
+ case SCTP_HEARTBEAT_INFO:
+ case SCTP_STATE_COOKIE:
+ case SCTP_UNRECOG_PARAM:
+ case SCTP_ERROR_CAUSE_IND:
+ /* ok skip fwd */
+ at += padded_size;
+ break;
+ /* Param's with variable size within a range */
+ case SCTP_CHUNK_LIST:
+ case SCTP_SUPPORTED_CHUNK_EXT:
+ if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
+ goto invalid_size;
+ }
+ at += padded_size;
+ break;
+ case SCTP_SUPPORTED_ADDRTYPE:
+ if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
+ goto invalid_size;
+ }
+ at += padded_size;
+ break;
+ case SCTP_RANDOM:
+ if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
+ goto invalid_size;
+ }
+ at += padded_size;
+ break;
+ case SCTP_SET_PRIM_ADDR:
+ case SCTP_DEL_IP_ADDRESS:
+ case SCTP_ADD_IP_ADDRESS:
+ if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
+ (padded_size != sizeof(struct sctp_asconf_addr_param))) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
+ goto invalid_size;
+ }
+ at += padded_size;
+ break;
+ /* Param's with a fixed size */
+ case SCTP_IPV4_ADDRESS:
+ if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
+ goto invalid_size;
+ }
+ at += padded_size;
+ break;
+ case SCTP_IPV6_ADDRESS:
+ if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
+ goto invalid_size;
+ }
+ at += padded_size;
+ break;
+ case SCTP_COOKIE_PRESERVE:
+ if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
+ goto invalid_size;
+ }
+ at += padded_size;
+ break;
+ case SCTP_HAS_NAT_SUPPORT:
+ *nat_friendly = 1;
+ /* fall through */
+ case SCTP_ECN_NONCE_SUPPORTED:
+ case SCTP_PRSCTP_SUPPORTED:
+
+ if (padded_size != sizeof(struct sctp_paramhdr)) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecnnonce/prsctp/nat support %d\n", plen);
+ goto invalid_size;
+ }
+ at += padded_size;
+ break;
+ case SCTP_ECN_CAPABLE:
+ if (padded_size != sizeof(struct sctp_ecn_supported_param)) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
+ goto invalid_size;
+ }
+ at += padded_size;
+ break;
+ case SCTP_ULP_ADAPTATION:
+ if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
+ goto invalid_size;
+ }
+ at += padded_size;
+ break;
+ case SCTP_SUCCESS_REPORT:
+ if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
+ goto invalid_size;
+ }
+ at += padded_size;
+ break;
+ case SCTP_HOSTNAME_ADDRESS:
+ {
+ /* We can NOT handle HOST NAME addresses!! */
+ int l_len;
+
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
+ *abort_processing = 1;
+ if (op_err == NULL) {
+ /* Ok need to try to get a mbuf */
+#ifdef INET6
+ l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
+#else
+ l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
+#endif
+ l_len += plen;
+ l_len += sizeof(struct sctp_paramhdr);
+ op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
+ if (op_err) {
+ SCTP_BUF_LEN(op_err) = 0;
+ /*
+ * pre-reserve space for ip
+ * and sctp header and
+ * chunk hdr
+ */
+#ifdef INET6
+ SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
+#else
+ SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
+#endif
+ SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
+ SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
+ }
+ }
+ if (op_err) {
+ /* If we have space */
+ struct sctp_paramhdr s;
+
+ if (err_at % 4) {
+ uint32_t cpthis = 0;
+
+ pad_needed = 4 - (err_at % 4);
+ m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
+ err_at += pad_needed;
+ }
+ s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
+ s.param_length = htons(sizeof(s) + plen);
+ m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
+ err_at += sizeof(s);
+ phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
+ if (phdr == NULL) {
+ sctp_m_freem(op_err);
+ /*
+ * we are out of memory but
+ * we still need to have a
+ * look at what to do (the
+ * system is in trouble
+ * though).
+ */
+ return (NULL);
+ }
+ m_copyback(op_err, err_at, plen, (caddr_t)phdr);
+ err_at += plen;
+ }
+ return (op_err);
+ break;
+ }
+ default:
+ /*
+ * we do not recognize the parameter figure out what
+ * we do.
+ */
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
+ if ((ptype & 0x4000) == 0x4000) {
+ /* Report bit is set?? */
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
+ if (op_err == NULL) {
+ int l_len;
+
+ /* Ok need to try to get an mbuf */
+#ifdef INET6
+ l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
+#else
+ l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
+#endif
+ l_len += plen;
+ l_len += sizeof(struct sctp_paramhdr);
+ op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
+ if (op_err) {
+ SCTP_BUF_LEN(op_err) = 0;
+#ifdef INET6
+ SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
+#else
+ SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
+#endif
+ SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
+ SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
+ }
+ }
+ if (op_err) {
+ /* If we have space */
+ struct sctp_paramhdr s;
+
+ if (err_at % 4) {
+ uint32_t cpthis = 0;
+
+ pad_needed = 4 - (err_at % 4);
+ m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
+ err_at += pad_needed;
+ }
+ s.param_type = htons(SCTP_UNRECOG_PARAM);
+ s.param_length = htons(sizeof(s) + plen);
+ m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
+ err_at += sizeof(s);
+ if (plen > sizeof(tempbuf)) {
+ plen = sizeof(tempbuf);
+ }
+ phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
+ if (phdr == NULL) {
+ sctp_m_freem(op_err);
+ /*
+ * we are out of memory but
+ * we still need to have a
+ * look at what to do (the
+ * system is in trouble
+ * though).
+ */
+ op_err = NULL;
+ goto more_processing;
+ }
+ m_copyback(op_err, err_at, plen, (caddr_t)phdr);
+ err_at += plen;
+ }
+ }
+ more_processing:
+ if ((ptype & 0x8000) == 0x0000) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
+ return (op_err);
+ } else {
+ /* skip this chunk and continue processing */
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
+ at += SCTP_SIZE32(plen);
+ }
+ break;
+
+ }
+ phdr = sctp_get_next_param(mat, at, &params, sizeof(params));
+ }
+ return (op_err);
+invalid_size:
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
+ *abort_processing = 1;
+ if ((op_err == NULL) && phdr) {
+ int l_len;
+
+#ifdef INET6
+ l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
+#else
+ l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
+#endif
+ l_len += (2 * sizeof(struct sctp_paramhdr));
+ op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
+ if (op_err) {
+ SCTP_BUF_LEN(op_err) = 0;
+#ifdef INET6
+ SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
+#else
+ SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
+#endif
+ SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
+ SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
+ }
+ }
+ if ((op_err) && phdr) {
+ struct sctp_paramhdr s;
+
+ if (err_at % 4) {
+ uint32_t cpthis = 0;
+
+ pad_needed = 4 - (err_at % 4);
+ m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
+ err_at += pad_needed;
+ }
+ s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
+ s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
+ m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
+ err_at += sizeof(s);
+ /* Only copy back the p-hdr that caused the issue */
+ m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
+ }
+ return (op_err);
+}
+
+static int
+sctp_are_there_new_addresses(struct sctp_association *asoc,
+ struct mbuf *in_initpkt, int iphlen, int offset)
+{
+ /*
+ * Given a INIT packet, look through the packet to verify that there
+ * are NO new addresses. As we go through the parameters add reports
+ * of any un-understood parameters that require an error. Also we
+ * must return (1) to drop the packet if we see a un-understood
+ * parameter that tells us to drop the chunk.
+ */
+ struct sockaddr_in sin4, *sa4;
+
+#ifdef INET6
+ struct sockaddr_in6 sin6, *sa6;
+
+#endif
+ struct sockaddr *sa_touse;
+ struct sockaddr *sa;
+ struct sctp_paramhdr *phdr, params;
+ struct ip *iph;
+
+#ifdef INET6
+ struct ip6_hdr *ip6h;
+
+#endif
+ struct mbuf *mat;
+ uint16_t ptype, plen;
+ int err_at;
+ uint8_t fnd;
+ struct sctp_nets *net;
+
+ memset(&sin4, 0, sizeof(sin4));
+#ifdef INET6
+ memset(&sin6, 0, sizeof(sin6));
+#endif
+ sin4.sin_family = AF_INET;
+ sin4.sin_len = sizeof(sin4);
+#ifdef INET6
+ sin6.sin6_family = AF_INET6;
+ sin6.sin6_len = sizeof(sin6);
+#endif
+ sa_touse = NULL;
+ /* First what about the src address of the pkt ? */
+ iph = mtod(in_initpkt, struct ip *);
+ switch (iph->ip_v) {
+ case IPVERSION:
+ /* source addr is IPv4 */
+ sin4.sin_addr = iph->ip_src;
+ sa_touse = (struct sockaddr *)&sin4;
+ break;
+#ifdef INET6
+ case IPV6_VERSION >> 4:
+ /* source addr is IPv6 */
+ ip6h = mtod(in_initpkt, struct ip6_hdr *);
+ sin6.sin6_addr = ip6h->ip6_src;
+ sa_touse = (struct sockaddr *)&sin6;
+ break;
+#endif
+ default:
+ return (1);
+ }
+
+ fnd = 0;
+ TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
+ sa = (struct sockaddr *)&net->ro._l_addr;
+ if (sa->sa_family == sa_touse->sa_family) {
+ if (sa->sa_family == AF_INET) {
+ sa4 = (struct sockaddr_in *)sa;
+ if (sa4->sin_addr.s_addr ==
+ sin4.sin_addr.s_addr) {
+ fnd = 1;
+ break;
+ }
+ }
+#ifdef INET6
+ if (sa->sa_family == AF_INET6) {
+ sa6 = (struct sockaddr_in6 *)sa;
+ if (SCTP6_ARE_ADDR_EQUAL(sa6,
+ &sin6)) {
+ fnd = 1;
+ break;
+ }
+ }
+#endif
+ }
+ }
+ if (fnd == 0) {
+ /* New address added! no need to look futher. */
+ return (1);
+ }
+ /* Ok so far lets munge through the rest of the packet */
+ mat = in_initpkt;
+ err_at = 0;
+ sa_touse = NULL;
+ offset += sizeof(struct sctp_init_chunk);
+ phdr = sctp_get_next_param(mat, offset, &params, sizeof(params));
+ while (phdr) {
+ ptype = ntohs(phdr->param_type);
+ plen = ntohs(phdr->param_length);
+ if (ptype == SCTP_IPV4_ADDRESS) {
+ struct sctp_ipv4addr_param *p4, p4_buf;
+
+ phdr = sctp_get_next_param(mat, offset,
+ (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
+ if (plen != sizeof(struct sctp_ipv4addr_param) ||
+ phdr == NULL) {
+ return (1);
+ }
+ p4 = (struct sctp_ipv4addr_param *)phdr;
+ sin4.sin_addr.s_addr = p4->addr;
+ sa_touse = (struct sockaddr *)&sin4;
+ } else if (ptype == SCTP_IPV6_ADDRESS) {
+ struct sctp_ipv6addr_param *p6, p6_buf;
+
+ phdr = sctp_get_next_param(mat, offset,
+ (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
+ if (plen != sizeof(struct sctp_ipv6addr_param) ||
+ phdr == NULL) {
+ return (1);
+ }
+ p6 = (struct sctp_ipv6addr_param *)phdr;
+#ifdef INET6
+ memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
+ sizeof(p6->addr));
+#endif
+ sa_touse = (struct sockaddr *)&sin4;
+ }
+ if (sa_touse) {
+ /* ok, sa_touse points to one to check */
+ fnd = 0;
+ TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
+ sa = (struct sockaddr *)&net->ro._l_addr;
+ if (sa->sa_family != sa_touse->sa_family) {
+ continue;
+ }
+ if (sa->sa_family == AF_INET) {
+ sa4 = (struct sockaddr_in *)sa;
+ if (sa4->sin_addr.s_addr ==
+ sin4.sin_addr.s_addr) {
+ fnd = 1;
+ break;
+ }
+ }
+#ifdef INET6
+ if (sa->sa_family == AF_INET6) {
+ sa6 = (struct sockaddr_in6 *)sa;
+ if (SCTP6_ARE_ADDR_EQUAL(
+ sa6, &sin6)) {
+ fnd = 1;
+ break;
+ }
+ }
+#endif
+ }
+ if (!fnd) {
+ /* New addr added! no need to look further */
+ return (1);
+ }
+ }
+ offset += SCTP_SIZE32(plen);
+ phdr = sctp_get_next_param(mat, offset, &params, sizeof(params));
+ }
+ return (0);
+}
+
+/*
+ * Given a MBUF chain that was sent into us containing an INIT. Build a
+ * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
+ * a pullup to include IPv6/4header, SCTP header and initial part of INIT
+ * message (i.e. the struct sctp_init_msg).
+ */
+void
+sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
+ struct mbuf *init_pkt, int iphlen, int offset, struct sctphdr *sh,
+ struct sctp_init_chunk *init_chk, uint32_t vrf_id, uint16_t port, int hold_inp_lock)
+{
+ struct sctp_association *asoc;
+ struct mbuf *m, *m_at, *m_tmp, *m_cookie, *op_err, *mp_last;
+ struct sctp_init_ack_chunk *initack;
+ struct sctp_adaptation_layer_indication *ali;
+ struct sctp_ecn_supported_param *ecn;
+ struct sctp_prsctp_supported_param *prsctp;
+ struct sctp_ecn_nonce_supported_param *ecn_nonce;
+ struct sctp_supported_chunk_types_param *pr_supported;
+ union sctp_sockstore store, store1, *over_addr;
+ struct sockaddr_in *sin, *to_sin;
+
+#ifdef INET6
+ struct sockaddr_in6 *sin6, *to_sin6;
+
+#endif
+ struct ip *iph;
+
+#ifdef INET6
+ struct ip6_hdr *ip6;
+
+#endif
+ struct sockaddr *to;
+ struct sctp_state_cookie stc;
+ struct sctp_nets *net = NULL;
+ uint8_t *signature = NULL;
+ int cnt_inits_to = 0;
+ uint16_t his_limit, i_want;
+ int abort_flag, padval;
+ int num_ext;
+ int p_len;
+ int nat_friendly = 0;
+ struct socket *so;
+
+ if (stcb)
+ asoc = &stcb->asoc;
+ else
+ asoc = NULL;
+ mp_last = NULL;
+ if ((asoc != NULL) &&
+ (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
+ (sctp_are_there_new_addresses(asoc, init_pkt, iphlen, offset))) {
+ /* new addresses, out of here in non-cookie-wait states */
+ /*
+ * Send a ABORT, we don't add the new address error clause
+ * though we even set the T bit and copy in the 0 tag.. this
+ * looks no different than if no listener was present.
+ */
+ sctp_send_abort(init_pkt, iphlen, sh, 0, NULL, vrf_id, port);
+ return;
+ }
+ abort_flag = 0;
+ op_err = sctp_arethere_unrecognized_parameters(init_pkt,
+ (offset + sizeof(struct sctp_init_chunk)),
+ &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
+ if (abort_flag) {
+do_a_abort:
+ sctp_send_abort(init_pkt, iphlen, sh,
+ init_chk->init.initiate_tag, op_err, vrf_id, port);
+ return;
+ }
+ m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
+ if (m == NULL) {
+ /* No memory, INIT timer will re-attempt. */
+ if (op_err)
+ sctp_m_freem(op_err);
+ return;
+ }
+ SCTP_BUF_LEN(m) = sizeof(struct sctp_init_chunk);
+
+ /* the time I built cookie */
+ (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
+
+ /* populate any tie tags */
+ if (asoc != NULL) {
+ /* unlock before tag selections */
+ stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
+ stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
+ stc.cookie_life = asoc->cookie_life;
+ net = asoc->primary_destination;
+ } else {
+ stc.tie_tag_my_vtag = 0;
+ stc.tie_tag_peer_vtag = 0;
+ /* life I will award this cookie */
+ stc.cookie_life = inp->sctp_ep.def_cookie_life;
+ }
+
+ /* copy in the ports for later check */
+ stc.myport = sh->dest_port;
+ stc.peerport = sh->src_port;
+
+ /*
+ * If we wanted to honor cookie life extentions, we would add to
+ * stc.cookie_life. For now we should NOT honor any extension
+ */
+ stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
+ if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
+ struct inpcb *in_inp;
+
+ /* Its a V6 socket */
+ in_inp = (struct inpcb *)inp;
+ stc.ipv6_addr_legal = 1;
+ /* Now look at the binding flag to see if V4 will be legal */
+ if (SCTP_IPV6_V6ONLY(in_inp) == 0) {
+ stc.ipv4_addr_legal = 1;
+ } else {
+ /* V4 addresses are NOT legal on the association */
+ stc.ipv4_addr_legal = 0;
+ }
+ } else {
+ /* Its a V4 socket, no - V6 */
+ stc.ipv4_addr_legal = 1;
+ stc.ipv6_addr_legal = 0;
+ }
+
+#ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
+ stc.ipv4_scope = 1;
+#else
+ stc.ipv4_scope = 0;
+#endif
+ /* now for scope setup */
+ memset((caddr_t)&store, 0, sizeof(store));
+ memset((caddr_t)&store1, 0, sizeof(store1));
+ sin = &store.sin;
+ to_sin = &store1.sin;
+#ifdef INET6
+ sin6 = &store.sin6;
+ to_sin6 = &store1.sin6;
+#endif
+ iph = mtod(init_pkt, struct ip *);
+ /* establish the to_addr's */
+ switch (iph->ip_v) {
+ case IPVERSION:
+ to_sin->sin_port = sh->dest_port;
+ to_sin->sin_family = AF_INET;
+ to_sin->sin_len = sizeof(struct sockaddr_in);
+ to_sin->sin_addr = iph->ip_dst;
+ break;
+#ifdef INET6
+ case IPV6_VERSION >> 4:
+ ip6 = mtod(init_pkt, struct ip6_hdr *);
+ to_sin6->sin6_addr = ip6->ip6_dst;
+ to_sin6->sin6_scope_id = 0;
+ to_sin6->sin6_port = sh->dest_port;
+ to_sin6->sin6_family = AF_INET6;
+ to_sin6->sin6_len = sizeof(struct sockaddr_in6);
+ break;
+#endif
+ default:
+ goto do_a_abort;
+ break;
+ };
+
+ if (net == NULL) {
+ to = (struct sockaddr *)&store;
+ switch (iph->ip_v) {
+ case IPVERSION:
+ {
+ sin->sin_family = AF_INET;
+ sin->sin_len = sizeof(struct sockaddr_in);
+ sin->sin_port = sh->src_port;
+ sin->sin_addr = iph->ip_src;
+ /* lookup address */
+ stc.address[0] = sin->sin_addr.s_addr;
+ stc.address[1] = 0;
+ stc.address[2] = 0;
+ stc.address[3] = 0;
+ stc.addr_type = SCTP_IPV4_ADDRESS;
+ /* local from address */
+ stc.laddress[0] = to_sin->sin_addr.s_addr;
+ stc.laddress[1] = 0;
+ stc.laddress[2] = 0;
+ stc.laddress[3] = 0;
+ stc.laddr_type = SCTP_IPV4_ADDRESS;
+ /* scope_id is only for v6 */
+ stc.scope_id = 0;
+#ifndef SCTP_DONT_DO_PRIVADDR_SCOPE
+ if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
+ stc.ipv4_scope = 1;
+ }
+#else
+ stc.ipv4_scope = 1;
+#endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
+ /* Must use the address in this case */
+ if (sctp_is_address_on_local_host((struct sockaddr *)sin, vrf_id)) {
+ stc.loopback_scope = 1;
+ stc.ipv4_scope = 1;
+ stc.site_scope = 1;
+ stc.local_scope = 0;
+ }
+ break;
+ }
+#ifdef INET6
+ case IPV6_VERSION >> 4:
+ {
+ ip6 = mtod(init_pkt, struct ip6_hdr *);
+ sin6->sin6_family = AF_INET6;
+ sin6->sin6_len = sizeof(struct sockaddr_in6);
+ sin6->sin6_port = sh->src_port;
+ sin6->sin6_addr = ip6->ip6_src;
+ /* lookup address */
+ memcpy(&stc.address, &sin6->sin6_addr,
+ sizeof(struct in6_addr));
+ sin6->sin6_scope_id = 0;
+ stc.addr_type = SCTP_IPV6_ADDRESS;
+ stc.scope_id = 0;
+ if (sctp_is_address_on_local_host((struct sockaddr *)sin6, vrf_id)) {
+ /*
+ * FIX ME: does this have scope from
+ * rcvif?
+ */
+ (void)sa6_recoverscope(sin6);
+ stc.scope_id = sin6->sin6_scope_id;
+ sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
+ stc.loopback_scope = 1;
+ stc.local_scope = 0;
+ stc.site_scope = 1;
+ stc.ipv4_scope = 1;
+ } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
+ /*
+ * If the new destination is a
+ * LINK_LOCAL we must have common
+ * both site and local scope. Don't
+ * set local scope though since we
+ * must depend on the source to be
+ * added implicitly. We cannot
+ * assure just because we share one
+ * link that all links are common.
+ */
+ stc.local_scope = 0;
+ stc.site_scope = 1;
+ stc.ipv4_scope = 1;
+ /*
+ * we start counting for the private
+ * address stuff at 1. since the
+ * link local we source from won't
+ * show up in our scoped count.
+ */
+ cnt_inits_to = 1;
+ /*
+ * pull out the scope_id from
+ * incoming pkt
+ */
+ /*
+ * FIX ME: does this have scope from
+ * rcvif?
+ */
+ (void)sa6_recoverscope(sin6);
+ stc.scope_id = sin6->sin6_scope_id;
+ sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
+ } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
+ /*
+ * If the new destination is
+ * SITE_LOCAL then we must have site
+ * scope in common.
+ */
+ stc.site_scope = 1;
+ }
+ memcpy(&stc.laddress, &to_sin6->sin6_addr, sizeof(struct in6_addr));
+ stc.laddr_type = SCTP_IPV6_ADDRESS;
+ break;
+ }
+#endif
+ default:
+ /* TSNH */
+ goto do_a_abort;
+ break;
+ }
+ } else {
+ /* set the scope per the existing tcb */
+
+#ifdef INET6
+ struct sctp_nets *lnet;
+
+#endif
+
+ stc.loopback_scope = asoc->loopback_scope;
+ stc.ipv4_scope = asoc->ipv4_local_scope;
+ stc.site_scope = asoc->site_scope;
+ stc.local_scope = asoc->local_scope;
+#ifdef INET6
+ /* Why do we not consider IPv4 LL addresses? */
+ TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
+ if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
+ if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
+ /*
+ * if we have a LL address, start
+ * counting at 1.
+ */
+ cnt_inits_to = 1;
+ }
+ }
+ }
+#endif
+ /* use the net pointer */
+ to = (struct sockaddr *)&net->ro._l_addr;
+ switch (to->sa_family) {
+ case AF_INET:
+ sin = (struct sockaddr_in *)to;
+ stc.address[0] = sin->sin_addr.s_addr;
+ stc.address[1] = 0;
+ stc.address[2] = 0;
+ stc.address[3] = 0;
+ stc.addr_type = SCTP_IPV4_ADDRESS;
+ if (net->src_addr_selected == 0) {
+ /*
+ * strange case here, the INIT should have
+ * did the selection.
+ */
+ net->ro._s_addr = sctp_source_address_selection(inp,
+ stcb, (sctp_route_t *) & net->ro,
+ net, 0, vrf_id);
+ if (net->ro._s_addr == NULL)
+ return;
+
+ net->src_addr_selected = 1;
+
+ }
+ stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
+ stc.laddress[1] = 0;
+ stc.laddress[2] = 0;
+ stc.laddress[3] = 0;
+ stc.laddr_type = SCTP_IPV4_ADDRESS;
+ break;
+#ifdef INET6
+ case AF_INET6:
+ sin6 = (struct sockaddr_in6 *)to;
+ memcpy(&stc.address, &sin6->sin6_addr,
+ sizeof(struct in6_addr));
+ stc.addr_type = SCTP_IPV6_ADDRESS;
+ if (net->src_addr_selected == 0) {
+ /*
+ * strange case here, the INIT should have
+ * did the selection.
+ */
+ net->ro._s_addr = sctp_source_address_selection(inp,
+ stcb, (sctp_route_t *) & net->ro,
+ net, 0, vrf_id);
+ if (net->ro._s_addr == NULL)
+ return;
+
+ net->src_addr_selected = 1;
+ }
+ memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
+ sizeof(struct in6_addr));
+ stc.laddr_type = SCTP_IPV6_ADDRESS;
+ break;
+#endif
+ }
+ }
+ /* Now lets put the SCTP header in place */
+ initack = mtod(m, struct sctp_init_ack_chunk *);
+ /* Save it off for quick ref */
+ stc.peers_vtag = init_chk->init.initiate_tag;
+ /* who are we */
+ memcpy(stc.identification, SCTP_VERSION_STRING,
+ min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
+ /* now the chunk header */
+ initack->ch.chunk_type = SCTP_INITIATION_ACK;
+ initack->ch.chunk_flags = 0;
+ /* fill in later from mbuf we build */
+ initack->ch.chunk_length = 0;
+ /* place in my tag */
+ if ((asoc != NULL) &&
+ ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
+ (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
+ (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
+ /* re-use the v-tags and init-seq here */
+ initack->init.initiate_tag = htonl(asoc->my_vtag);
+ initack->init.initial_tsn = htonl(asoc->init_seq_number);
+ } else {
+ uint32_t vtag, itsn;
+
+ if (hold_inp_lock) {
+ SCTP_INP_INCR_REF(inp);
+ SCTP_INP_RUNLOCK(inp);
+ }
+ if (asoc) {
+ atomic_add_int(&asoc->refcnt, 1);
+ SCTP_TCB_UNLOCK(stcb);
+ new_tag:
+ vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
+ if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
+ /*
+ * Got a duplicate vtag on some guy behind a
+ * nat make sure we don't use it.
+ */
+ goto new_tag;
+ }
+ initack->init.initiate_tag = htonl(vtag);
+ /* get a TSN to use too */
+ itsn = sctp_select_initial_TSN(&inp->sctp_ep);
+ initack->init.initial_tsn = htonl(itsn);
+ SCTP_TCB_LOCK(stcb);
+ atomic_add_int(&asoc->refcnt, -1);
+ } else {
+ vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
+ initack->init.initiate_tag = htonl(vtag);
+ /* get a TSN to use too */
+ initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
+ }
+ if (hold_inp_lock) {
+ SCTP_INP_RLOCK(inp);
+ SCTP_INP_DECR_REF(inp);
+ }
+ }
+ /* save away my tag to */
+ stc.my_vtag = initack->init.initiate_tag;
+
+ /* set up some of the credits. */
+ so = inp->sctp_socket;
+ if (so == NULL) {
+ /* memory problem */
+ sctp_m_freem(m);
+ return;
+ } else {
+ initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
+ }
+ /* set what I want */
+ his_limit = ntohs(init_chk->init.num_inbound_streams);
+ /* choose what I want */
+ if (asoc != NULL) {
+ if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) {
+ i_want = asoc->streamoutcnt;
+ } else {
+ i_want = inp->sctp_ep.pre_open_stream_count;
+ }
+ } else {
+ i_want = inp->sctp_ep.pre_open_stream_count;
+ }
+ if (his_limit < i_want) {
+ /* I Want more :< */
+ initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
+ } else {
+ /* I can have what I want :> */
+ initack->init.num_outbound_streams = htons(i_want);
+ }
+ /* tell him his limt. */
+ initack->init.num_inbound_streams =
+ htons(inp->sctp_ep.max_open_streams_intome);
+
+ /* adaptation layer indication parameter */
+ ali = (struct sctp_adaptation_layer_indication *)((caddr_t)initack + sizeof(*initack));
+ ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
+ ali->ph.param_length = htons(sizeof(*ali));
+ ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
+ SCTP_BUF_LEN(m) += sizeof(*ali);
+ ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali));
+
+ /* ECN parameter */
+ if (SCTP_BASE_SYSCTL(sctp_ecn_enable) == 1) {
+ ecn->ph.param_type = htons(SCTP_ECN_CAPABLE);
+ ecn->ph.param_length = htons(sizeof(*ecn));
+ SCTP_BUF_LEN(m) += sizeof(*ecn);
+
+ prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn +
+ sizeof(*ecn));
+ } else {
+ prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn);
+ }
+ /* And now tell the peer we do pr-sctp */
+ prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED);
+ prsctp->ph.param_length = htons(sizeof(*prsctp));
+ SCTP_BUF_LEN(m) += sizeof(*prsctp);
+ if (nat_friendly) {
+ /* Add NAT friendly parameter */
+ struct sctp_paramhdr *ph;
+
+ ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
+ ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
+ ph->param_length = htons(sizeof(struct sctp_paramhdr));
+ SCTP_BUF_LEN(m) += sizeof(struct sctp_paramhdr);
+ }
+ /* And now tell the peer we do all the extensions */
+ pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
+ pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
+ num_ext = 0;
+ pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
+ pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
+ pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
+ pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
+ pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
+ if (!SCTP_BASE_SYSCTL(sctp_auth_disable))
+ pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
+ if (SCTP_BASE_SYSCTL(sctp_nr_sack_on_off))
+ pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
+ p_len = sizeof(*pr_supported) + num_ext;
+ pr_supported->ph.param_length = htons(p_len);
+ bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len);
+ SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
+
+ /* ECN nonce: And now tell the peer we support ECN nonce */
+ if (SCTP_BASE_SYSCTL(sctp_ecn_nonce)) {
+ ecn_nonce = (struct sctp_ecn_nonce_supported_param *)
+ ((caddr_t)pr_supported + SCTP_SIZE32(p_len));
+ ecn_nonce->ph.param_type = htons(SCTP_ECN_NONCE_SUPPORTED);
+ ecn_nonce->ph.param_length = htons(sizeof(*ecn_nonce));
+ SCTP_BUF_LEN(m) += sizeof(*ecn_nonce);
+ }
+ /* add authentication parameters */
+ if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
+ struct sctp_auth_random *randp;
+ struct sctp_auth_hmac_algo *hmacs;
+ struct sctp_auth_chunk_list *chunks;
+ uint16_t random_len;
+
+ /* generate and add RANDOM parameter */
+ random_len = SCTP_AUTH_RANDOM_SIZE_DEFAULT;
+ randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
+ randp->ph.param_type = htons(SCTP_RANDOM);
+ p_len = sizeof(*randp) + random_len;
+ randp->ph.param_length = htons(p_len);
+ SCTP_READ_RANDOM(randp->random_data, random_len);
+ /* zero out any padding required */
+ bzero((caddr_t)randp + p_len, SCTP_SIZE32(p_len) - p_len);
+ SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
+
+ /* add HMAC_ALGO parameter */
+ hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
+ p_len = sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
+ (uint8_t *) hmacs->hmac_ids);
+ if (p_len > 0) {
+ p_len += sizeof(*hmacs);
+ hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
+ hmacs->ph.param_length = htons(p_len);
+ /* zero out any padding required */
+ bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len);
+ SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
+ }
+ /* add CHUNKS parameter */
+ chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
+ p_len = sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
+ chunks->chunk_types);
+ if (p_len > 0) {
+ p_len += sizeof(*chunks);
+ chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
+ chunks->ph.param_length = htons(p_len);
+ /* zero out any padding required */
+ bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len);
+ SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
+ }
+ }
+ m_at = m;
+ /* now the addresses */
+ {
+ struct sctp_scoping scp;
+
+ /*
+ * To optimize this we could put the scoping stuff into a
+ * structure and remove the individual uint8's from the stc
+ * structure. Then we could just sifa in the address within
+ * the stc.. but for now this is a quick hack to get the
+ * address stuff teased apart.
+ */
+ scp.ipv4_addr_legal = stc.ipv4_addr_legal;
+ scp.ipv6_addr_legal = stc.ipv6_addr_legal;
+ scp.loopback_scope = stc.loopback_scope;
+ scp.ipv4_local_scope = stc.ipv4_scope;
+ scp.local_scope = stc.local_scope;
+ scp.site_scope = stc.site_scope;
+ m_at = sctp_add_addresses_to_i_ia(inp, &scp, m_at, cnt_inits_to);
+ }
+
+ /* tack on the operational error if present */
+ if (op_err) {
+ struct mbuf *ol;
+ int llen;
+
+ llen = 0;
+ ol = op_err;
+ while (ol) {
+ llen += SCTP_BUF_LEN(ol);
+ ol = SCTP_BUF_NEXT(ol);
+ }
+ if (llen % 4) {
+ /* must add a pad to the param */
+ uint32_t cpthis = 0;
+ int padlen;
+
+ padlen = 4 - (llen % 4);
+ m_copyback(op_err, llen, padlen, (caddr_t)&cpthis);
+ }
+ while (SCTP_BUF_NEXT(m_at) != NULL) {
+ m_at = SCTP_BUF_NEXT(m_at);
+ }
+ SCTP_BUF_NEXT(m_at) = op_err;
+ while (SCTP_BUF_NEXT(m_at) != NULL) {
+ m_at = SCTP_BUF_NEXT(m_at);
+ }
+ }
+ /* pre-calulate the size and update pkt header and chunk header */
+ p_len = 0;
+ for (m_tmp = m; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
+ p_len += SCTP_BUF_LEN(m_tmp);
+ if (SCTP_BUF_NEXT(m_tmp) == NULL) {
+ /* m_tmp should now point to last one */
+ break;
+ }
+ }
+
+ /* Now we must build a cookie */
+ m_cookie = sctp_add_cookie(inp, init_pkt, offset, m, 0, &stc, &signature);
+ if (m_cookie == NULL) {
+ /* memory problem */
+ sctp_m_freem(m);
+ return;
+ }
+ /* Now append the cookie to the end and update the space/size */
+ SCTP_BUF_NEXT(m_tmp) = m_cookie;
+
+ for (m_tmp = m_cookie; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
+ p_len += SCTP_BUF_LEN(m_tmp);
+ if (SCTP_BUF_NEXT(m_tmp) == NULL) {
+ /* m_tmp should now point to last one */
+ mp_last = m_tmp;
+ break;
+ }
+ }
+ /*
+ * Place in the size, but we don't include the last pad (if any) in
+ * the INIT-ACK.
+ */
+ initack->ch.chunk_length = htons(p_len);
+
+ /*
+ * Time to sign the cookie, we don't sign over the cookie signature
+ * though thus we set trailer.
+ */
+ (void)sctp_hmac_m(SCTP_HMAC,
+ (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
+ SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
+ (uint8_t *) signature, SCTP_SIGNATURE_SIZE);
+ /*
+ * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
+ * here since the timer will drive a retranmission.
+ */
+ padval = p_len % 4;
+ if ((padval) && (mp_last)) {
+ /* see my previous comments on mp_last */
+ int ret;
+
+ ret = sctp_add_pad_tombuf(mp_last, (4 - padval));
+ if (ret) {
+ /* Houston we have a problem, no space */
+ sctp_m_freem(m);
+ return;
+ }
+ p_len += padval;
+ }
+ if (stc.loopback_scope) {
+ over_addr = &store1;
+ } else {
+ over_addr = NULL;
+ }
+
+ (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
+ 0, NULL, 0,
+ inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
+ port, SCTP_SO_NOT_LOCKED, over_addr);
+ SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+}
+
+
+void
+sctp_insert_on_wheel(struct sctp_tcb *stcb,
+ struct sctp_association *asoc,
+ struct sctp_stream_out *strq, int holds_lock)
+{
+ if (holds_lock == 0) {
+ SCTP_TCB_SEND_LOCK(stcb);
+ }
+ if ((strq->next_spoke.tqe_next == NULL) &&
+ (strq->next_spoke.tqe_prev == NULL)) {
+ TAILQ_INSERT_TAIL(&asoc->out_wheel, strq, next_spoke);
+ }
+ if (holds_lock == 0) {
+ SCTP_TCB_SEND_UNLOCK(stcb);
+ }
+}
+
+void
+sctp_remove_from_wheel(struct sctp_tcb *stcb,
+ struct sctp_association *asoc,
+ struct sctp_stream_out *strq,
+ int holds_lock)
+{
+ /* take off and then setup so we know it is not on the wheel */
+ if (holds_lock == 0) {
+ SCTP_TCB_SEND_LOCK(stcb);
+ }
+ if (TAILQ_EMPTY(&strq->outqueue)) {
+ if (asoc->last_out_stream == strq) {
+ asoc->last_out_stream = TAILQ_PREV(asoc->last_out_stream, sctpwheel_listhead, next_spoke);
+ if (asoc->last_out_stream == NULL) {
+ asoc->last_out_stream = TAILQ_LAST(&asoc->out_wheel, sctpwheel_listhead);
+ }
+ if (asoc->last_out_stream == strq) {
+ asoc->last_out_stream = NULL;
+ }
+ }
+ TAILQ_REMOVE(&asoc->out_wheel, strq, next_spoke);
+ strq->next_spoke.tqe_next = NULL;
+ strq->next_spoke.tqe_prev = NULL;
+ }
+ if (holds_lock == 0) {
+ SCTP_TCB_SEND_UNLOCK(stcb);
+ }
+}
+
+static void
+sctp_prune_prsctp(struct sctp_tcb *stcb,
+ struct sctp_association *asoc,
+ struct sctp_sndrcvinfo *srcv,
+ int dataout)
+{
+ int freed_spc = 0;
+ struct sctp_tmit_chunk *chk, *nchk;
+
+ SCTP_TCB_LOCK_ASSERT(stcb);
+ if ((asoc->peer_supports_prsctp) &&
+ (asoc->sent_queue_cnt_removeable > 0)) {
+ TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
+ /*
+ * Look for chunks marked with the PR_SCTP flag AND
+ * the buffer space flag. If the one being sent is
+ * equal or greater priority then purge the old one
+ * and free some space.
+ */
+ if (PR_SCTP_BUF_ENABLED(chk->flags)) {
+ /*
+ * This one is PR-SCTP AND buffer space
+ * limited type
+ */
+ if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
+ /*
+ * Lower numbers equates to higher
+ * priority so if the one we are
+ * looking at has a larger or equal
+ * priority we want to drop the data
+ * and NOT retransmit it.
+ */
+ if (chk->data) {
+ /*
+ * We release the book_size
+ * if the mbuf is here
+ */
+ int ret_spc;
+ int cause;
+
+ if (chk->sent > SCTP_DATAGRAM_UNSENT)
+ cause = SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_SENT;
+ else
+ cause = SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_UNSENT;
+ ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
+ cause,
+ SCTP_SO_LOCKED);
+ freed_spc += ret_spc;
+ if (freed_spc >= dataout) {
+ return;
+ }
+ } /* if chunk was present */
+ } /* if of sufficent priority */
+ } /* if chunk has enabled */
+ } /* tailqforeach */
+
+ chk = TAILQ_FIRST(&asoc->send_queue);
+ while (chk) {
+ nchk = TAILQ_NEXT(chk, sctp_next);
+ /* Here we must move to the sent queue and mark */
+ if (PR_SCTP_BUF_ENABLED(chk->flags)) {
+ if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
+ if (chk->data) {
+ /*
+ * We release the book_size
+ * if the mbuf is here
+ */
+ int ret_spc;
+
+ ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
+ SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_UNSENT,
+ SCTP_SO_LOCKED);
+
+ freed_spc += ret_spc;
+ if (freed_spc >= dataout) {
+ return;
+ }
+ } /* end if chk->data */
+ } /* end if right class */
+ } /* end if chk pr-sctp */
+ chk = nchk;
+ } /* end while (chk) */
+ } /* if enabled in asoc */
+}
+
+int
+sctp_get_frag_point(struct sctp_tcb *stcb,
+ struct sctp_association *asoc)
+{
+ int siz, ovh;
+
+ /*
+ * For endpoints that have both v6 and v4 addresses we must reserve
+ * room for the ipv6 header, for those that are only dealing with V4
+ * we use a larger frag point.
+ */
+ if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
+ ovh = SCTP_MED_OVERHEAD;
+ } else {
+ ovh = SCTP_MED_V4_OVERHEAD;
+ }
+
+ if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
+ siz = asoc->smallest_mtu - ovh;
+ else
+ siz = (stcb->asoc.sctp_frag_point - ovh);
+ /*
+ * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
+ */
+ /* A data chunk MUST fit in a cluster */
+ /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
+ /* } */
+
+ /* adjust for an AUTH chunk if DATA requires auth */
+ if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
+ siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
+
+ if (siz % 4) {
+ /* make it an even word boundary please */
+ siz -= (siz % 4);
+ }
+ return (siz);
+}
+
+static void
+sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
+{
+ sp->pr_sctp_on = 0;
+ /*
+ * We assume that the user wants PR_SCTP_TTL if the user provides a
+ * positive lifetime but does not specify any PR_SCTP policy. This
+ * is a BAD assumption and causes problems at least with the
+ * U-Vancovers MPI folks. I will change this to be no policy means
+ * NO PR-SCTP.
+ */
+ if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
+ sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
+ sp->pr_sctp_on = 1;
+ } else {
+ return;
+ }
+ switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
+ case CHUNK_FLAGS_PR_SCTP_BUF:
+ /*
+ * Time to live is a priority stored in tv_sec when doing
+ * the buffer drop thing.
+ */
+ sp->ts.tv_sec = sp->timetolive;
+ sp->ts.tv_usec = 0;
+ break;
+ case CHUNK_FLAGS_PR_SCTP_TTL:
+ {
+ struct timeval tv;
+
+ (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
+ tv.tv_sec = sp->timetolive / 1000;
+ tv.tv_usec = (sp->timetolive * 1000) % 1000000;
+ /*
+ * TODO sctp_constants.h needs alternative time
+ * macros when _KERNEL is undefined.
+ */
+ timevaladd(&sp->ts, &tv);
+ }
+ break;
+ case CHUNK_FLAGS_PR_SCTP_RTX:
+ /*
+ * Time to live is a the number or retransmissions stored in
+ * tv_sec.
+ */
+ sp->ts.tv_sec = sp->timetolive;
+ sp->ts.tv_usec = 0;
+ break;
+ default:
+ SCTPDBG(SCTP_DEBUG_USRREQ1,
+ "Unknown PR_SCTP policy %u.\n",
+ PR_SCTP_POLICY(sp->sinfo_flags));
+ break;
+ }
+}
+
+static int
+sctp_msg_append(struct sctp_tcb *stcb,
+ struct sctp_nets *net,
+ struct mbuf *m,
+ struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
+{
+ int error = 0, holds_lock;
+ struct mbuf *at;
+ struct sctp_stream_queue_pending *sp = NULL;
+ struct sctp_stream_out *strm;
+
+ /*
+ * Given an mbuf chain, put it into the association send queue and
+ * place it on the wheel
+ */
+ holds_lock = hold_stcb_lock;
+ if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
+ /* Invalid stream number */
+ SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ error = EINVAL;
+ goto out_now;
+ }
+ if ((stcb->asoc.stream_locked) &&
+ (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
+ SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ error = EINVAL;
+ goto out_now;
+ }
+ strm = &stcb->asoc.strmout[srcv->sinfo_stream];
+ /* Now can we send this? */
+ if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
+ (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
+ (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
+ (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
+ /* got data while shutting down */
+ SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
+ error = ECONNRESET;
+ goto out_now;
+ }
+ sctp_alloc_a_strmoq(stcb, sp);
+ if (sp == NULL) {
+ SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+ error = ENOMEM;
+ goto out_now;
+ }
+ sp->sinfo_flags = srcv->sinfo_flags;
+ sp->timetolive = srcv->sinfo_timetolive;
+ sp->ppid = srcv->sinfo_ppid;
+ sp->context = srcv->sinfo_context;
+ sp->strseq = 0;
+ if (sp->sinfo_flags & SCTP_ADDR_OVER) {
+ sp->net = net;
+ atomic_add_int(&sp->net->ref_count, 1);
+ } else {
+ sp->net = NULL;
+ }
+ (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
+ sp->stream = srcv->sinfo_stream;
+ sp->msg_is_complete = 1;
+ sp->sender_all_done = 1;
+ sp->some_taken = 0;
+ sp->data = m;
+ sp->tail_mbuf = NULL;
+ sp->length = 0;
+ at = m;
+ sctp_set_prsctp_policy(sp);
+ /*
+ * We could in theory (for sendall) sifa the length in, but we would
+ * still have to hunt through the chain since we need to setup the
+ * tail_mbuf
+ */
+ while (at) {
+ if (SCTP_BUF_NEXT(at) == NULL)
+ sp->tail_mbuf = at;
+ sp->length += SCTP_BUF_LEN(at);
+ at = SCTP_BUF_NEXT(at);
+ }
+ SCTP_TCB_SEND_LOCK(stcb);
+ sctp_snd_sb_alloc(stcb, sp->length);
+ atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
+ TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
+ if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) {
+ sp->strseq = strm->next_sequence_sent;
+ strm->next_sequence_sent++;
+ }
+ if ((strm->next_spoke.tqe_next == NULL) &&
+ (strm->next_spoke.tqe_prev == NULL)) {
+ /* Not on wheel, insert */
+ sctp_insert_on_wheel(stcb, &stcb->asoc, strm, 1);
+ }
+ m = NULL;
+ SCTP_TCB_SEND_UNLOCK(stcb);
+out_now:
+ if (m) {
+ sctp_m_freem(m);
+ }
+ return (error);
+}
+
+
+static struct mbuf *
+sctp_copy_mbufchain(struct mbuf *clonechain,
+ struct mbuf *outchain,
+ struct mbuf **endofchain,
+ int can_take_mbuf,
+ int sizeofcpy,
+ uint8_t copy_by_ref)
+{
+ struct mbuf *m;
+ struct mbuf *appendchain;
+ caddr_t cp;
+ int len;
+
+ if (endofchain == NULL) {
+ /* error */
+error_out:
+ if (outchain)
+ sctp_m_freem(outchain);
+ return (NULL);
+ }
+ if (can_take_mbuf) {
+ appendchain = clonechain;
+ } else {
+ if (!copy_by_ref &&
+ (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
+ ) {
+ /* Its not in a cluster */
+ if (*endofchain == NULL) {
+ /* lets get a mbuf cluster */
+ if (outchain == NULL) {
+ /* This is the general case */
+ new_mbuf:
+ outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER);
+ if (outchain == NULL) {
+ goto error_out;
+ }
+ SCTP_BUF_LEN(outchain) = 0;
+ *endofchain = outchain;
+ /* get the prepend space */
+ SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
+ } else {
+ /*
+ * We really should not get a NULL
+ * in endofchain
+ */
+ /* find end */
+ m = outchain;
+ while (m) {
+ if (SCTP_BUF_NEXT(m) == NULL) {
+ *endofchain = m;
+ break;
+ }
+ m = SCTP_BUF_NEXT(m);
+ }
+ /* sanity */
+ if (*endofchain == NULL) {
+ /*
+ * huh, TSNH XXX maybe we
+ * should panic
+ */
+ sctp_m_freem(outchain);
+ goto new_mbuf;
+ }
+ }
+ /* get the new end of length */
+ len = M_TRAILINGSPACE(*endofchain);
+ } else {
+ /* how much is left at the end? */
+ len = M_TRAILINGSPACE(*endofchain);
+ }
+ /* Find the end of the data, for appending */
+ cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
+
+ /* Now lets copy it out */
+ if (len >= sizeofcpy) {
+ /* It all fits, copy it in */
+ m_copydata(clonechain, 0, sizeofcpy, cp);
+ SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
+ } else {
+ /* fill up the end of the chain */
+ if (len > 0) {
+ m_copydata(clonechain, 0, len, cp);
+ SCTP_BUF_LEN((*endofchain)) += len;
+ /* now we need another one */
+ sizeofcpy -= len;
+ }
+ m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER);
+ if (m == NULL) {
+ /* We failed */
+ goto error_out;
+ }
+ SCTP_BUF_NEXT((*endofchain)) = m;
+ *endofchain = m;
+ cp = mtod((*endofchain), caddr_t);
+ m_copydata(clonechain, len, sizeofcpy, cp);
+ SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
+ }
+ return (outchain);
+ } else {
+ /* copy the old fashion way */
+ appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_DONTWAIT);
+#ifdef SCTP_MBUF_LOGGING
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
+ struct mbuf *mat;
+
+ mat = appendchain;
+ while (mat) {
+ if (SCTP_BUF_IS_EXTENDED(mat)) {
+ sctp_log_mb(mat, SCTP_MBUF_ICOPY);
+ }
+ mat = SCTP_BUF_NEXT(mat);
+ }
+ }
+#endif
+ }
+ }
+ if (appendchain == NULL) {
+ /* error */
+ if (outchain)
+ sctp_m_freem(outchain);
+ return (NULL);
+ }
+ if (outchain) {
+ /* tack on to the end */
+ if (*endofchain != NULL) {
+ SCTP_BUF_NEXT(((*endofchain))) = appendchain;
+ } else {
+ m = outchain;
+ while (m) {
+ if (SCTP_BUF_NEXT(m) == NULL) {
+ SCTP_BUF_NEXT(m) = appendchain;
+ break;
+ }
+ m = SCTP_BUF_NEXT(m);
+ }
+ }
+ /*
+ * save off the end and update the end-chain postion
+ */
+ m = appendchain;
+ while (m) {
+ if (SCTP_BUF_NEXT(m) == NULL) {
+ *endofchain = m;
+ break;
+ }
+ m = SCTP_BUF_NEXT(m);
+ }
+ return (outchain);
+ } else {
+ /* save off the end and update the end-chain postion */
+ m = appendchain;
+ while (m) {
+ if (SCTP_BUF_NEXT(m) == NULL) {
+ *endofchain = m;
+ break;
+ }
+ m = SCTP_BUF_NEXT(m);
+ }
+ return (appendchain);
+ }
+}
+
+int
+sctp_med_chunk_output(struct sctp_inpcb *inp,
+ struct sctp_tcb *stcb,
+ struct sctp_association *asoc,
+ int *num_out,
+ int *reason_code,
+ int control_only, int from_where,
+ struct timeval *now, int *now_filled, int frag_point, int so_locked
+#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
+ SCTP_UNUSED
+#endif
+);
+
+static void
+sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
+ uint32_t val)
+{
+ struct sctp_copy_all *ca;
+ struct mbuf *m;
+ int ret = 0;
+ int added_control = 0;
+ int un_sent, do_chunk_output = 1;
+ struct sctp_association *asoc;
+
+ ca = (struct sctp_copy_all *)ptr;
+ if (ca->m == NULL) {
+ return;
+ }
+ if (ca->inp != inp) {
+ /* TSNH */
+ return;
+ }
+ if ((ca->m) && ca->sndlen) {
+ m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_DONTWAIT);
+ if (m == NULL) {
+ /* can't copy so we are done */
+ ca->cnt_failed++;
+ return;
+ }
+#ifdef SCTP_MBUF_LOGGING
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
+ struct mbuf *mat;
+
+ mat = m;
+ while (mat) {
+ if (SCTP_BUF_IS_EXTENDED(mat)) {
+ sctp_log_mb(mat, SCTP_MBUF_ICOPY);
+ }
+ mat = SCTP_BUF_NEXT(mat);
+ }
+ }
+#endif
+ } else {
+ m = NULL;
+ }
+ SCTP_TCB_LOCK_ASSERT(stcb);
+ if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
+ /* Abort this assoc with m as the user defined reason */
+ if (m) {
+ struct sctp_paramhdr *ph;
+
+ SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_DONTWAIT);
+ if (m) {
+ ph = mtod(m, struct sctp_paramhdr *);
+ ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
+ ph->param_length = htons(ca->sndlen);
+ }
+ /*
+ * We add one here to keep the assoc from
+ * dis-appearing on us.
+ */
+ atomic_add_int(&stcb->asoc.refcnt, 1);
+ sctp_abort_an_association(inp, stcb,
+ SCTP_RESPONSE_TO_USER_REQ,
+ m, SCTP_SO_NOT_LOCKED);
+ /*
+ * sctp_abort_an_association calls sctp_free_asoc()
+ * free association will NOT free it since we
+ * incremented the refcnt .. we do this to prevent
+ * it being freed and things getting tricky since we
+ * could end up (from free_asoc) calling inpcb_free
+ * which would get a recursive lock call to the
+ * iterator lock.. But as a consequence of that the
+ * stcb will return to us un-locked.. since
+ * free_asoc returns with either no TCB or the TCB
+ * unlocked, we must relock.. to unlock in the
+ * iterator timer :-0
+ */
+ SCTP_TCB_LOCK(stcb);
+ atomic_add_int(&stcb->asoc.refcnt, -1);
+ goto no_chunk_output;
+ }
+ } else {
+ if (m) {
+ ret = sctp_msg_append(stcb, stcb->asoc.primary_destination, m,
+ &ca->sndrcv, 1);
+ }
+ asoc = &stcb->asoc;
+ if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
+ /* shutdown this assoc */
+ int cnt;
+
+ cnt = sctp_is_there_unsent_data(stcb);
+
+ if (TAILQ_EMPTY(&asoc->send_queue) &&
+ TAILQ_EMPTY(&asoc->sent_queue) &&
+ (cnt == 0)) {
+ if (asoc->locked_on_sending) {
+ goto abort_anyway;
+ }
+ /*
+ * there is nothing queued to send, so I'm
+ * done...
+ */
+ if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
+ (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
+ (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
+ /*
+ * only send SHUTDOWN the first time
+ * through
+ */
+ sctp_send_shutdown(stcb, stcb->asoc.primary_destination);
+ if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
+ SCTP_STAT_DECR_GAUGE32(sctps_currestab);
+ }
+ SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
+ SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
+ sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
+ asoc->primary_destination);
+ sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
+ asoc->primary_destination);
+ added_control = 1;
+ do_chunk_output = 0;
+ }
+ } else {
+ /*
+ * we still got (or just got) data to send,
+ * so set SHUTDOWN_PENDING
+ */
+ /*
+ * XXX sockets draft says that SCTP_EOF
+ * should be sent with no data. currently,
+ * we will allow user data to be sent first
+ * and move to SHUTDOWN-PENDING
+ */
+ if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
+ (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
+ (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
+ if (asoc->locked_on_sending) {
+ /*
+ * Locked to send out the
+ * data
+ */
+ struct sctp_stream_queue_pending *sp;
+
+ sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
+ if (sp) {
+ if ((sp->length == 0) && (sp->msg_is_complete == 0))
+ asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
+ }
+ }
+ asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
+ if (TAILQ_EMPTY(&asoc->send_queue) &&
+ TAILQ_EMPTY(&asoc->sent_queue) &&
+ (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
+ abort_anyway:
+ atomic_add_int(&stcb->asoc.refcnt, 1);
+ sctp_abort_an_association(stcb->sctp_ep, stcb,
+ SCTP_RESPONSE_TO_USER_REQ,
+ NULL, SCTP_SO_NOT_LOCKED);
+ atomic_add_int(&stcb->asoc.refcnt, -1);
+ goto no_chunk_output;
+ }
+ sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
+ asoc->primary_destination);
+ }
+ }
+
+ }
+ }
+ un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
+ (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
+
+ if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
+ (stcb->asoc.total_flight > 0) &&
+ (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))
+ ) {
+ do_chunk_output = 0;
+ }
+ if (do_chunk_output)
+ sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
+ else if (added_control) {
+ int num_out = 0, reason = 0, now_filled = 0;
+ struct timeval now;
+ int frag_point;
+
+ frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
+ (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
+ &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
+ }
+no_chunk_output:
+ if (ret) {
+ ca->cnt_failed++;
+ } else {
+ ca->cnt_sent++;
+ }
+}
+
+static void
+sctp_sendall_completes(void *ptr, uint32_t val)
+{
+ struct sctp_copy_all *ca;
+
+ ca = (struct sctp_copy_all *)ptr;
+ /*
+ * Do a notify here? Kacheong suggests that the notify be done at
+ * the send time.. so you would push up a notification if any send
+ * failed. Don't know if this is feasable since the only failures we
+ * have is "memory" related and if you cannot get an mbuf to send
+ * the data you surely can't get an mbuf to send up to notify the
+ * user you can't send the data :->
+ */
+
+ /* now free everything */
+ sctp_m_freem(ca->m);
+ SCTP_FREE(ca, SCTP_M_COPYAL);
+}
+
+
+#define MC_ALIGN(m, len) do { \
+ SCTP_BUF_RESV_UF(m, ((MCLBYTES - (len)) & ~(sizeof(long) - 1)); \
+} while (0)
+
+
+
+static struct mbuf *
+sctp_copy_out_all(struct uio *uio, int len)
+{
+ struct mbuf *ret, *at;
+ int left, willcpy, cancpy, error;
+
+ ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAIT, 1, MT_DATA);
+ if (ret == NULL) {
+ /* TSNH */
+ return (NULL);
+ }
+ left = len;
+ SCTP_BUF_LEN(ret) = 0;
+ /* save space for the data chunk header */
+ cancpy = M_TRAILINGSPACE(ret);
+ willcpy = min(cancpy, left);
+ at = ret;
+ while (left > 0) {
+ /* Align data to the end */
+ error = uiomove(mtod(at, caddr_t), willcpy, uio);
+ if (error) {
+ err_out_now:
+ sctp_m_freem(at);
+ return (NULL);
+ }
+ SCTP_BUF_LEN(at) = willcpy;
+ SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
+ left -= willcpy;
+ if (left > 0) {
+ SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAIT, 1, MT_DATA);
+ if (SCTP_BUF_NEXT(at) == NULL) {
+ goto err_out_now;
+ }
+ at = SCTP_BUF_NEXT(at);
+ SCTP_BUF_LEN(at) = 0;
+ cancpy = M_TRAILINGSPACE(at);
+ willcpy = min(cancpy, left);
+ }
+ }
+ return (ret);
+}
+
+static int
+sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
+ struct sctp_sndrcvinfo *srcv)
+{
+ int ret;
+ struct sctp_copy_all *ca;
+
+ SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
+ SCTP_M_COPYAL);
+ if (ca == NULL) {
+ sctp_m_freem(m);
+ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+ return (ENOMEM);
+ }
+ memset(ca, 0, sizeof(struct sctp_copy_all));
+
+ ca->inp = inp;
+ memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
+ /*
+ * take off the sendall flag, it would be bad if we failed to do
+ * this :-0
+ */
+ ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
+ /* get length and mbuf chain */
+ if (uio) {
+ ca->sndlen = uio->uio_resid;
+ ca->m = sctp_copy_out_all(uio, ca->sndlen);
+ if (ca->m == NULL) {
+ SCTP_FREE(ca, SCTP_M_COPYAL);
+ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+ return (ENOMEM);
+ }
+ } else {
+ /* Gather the length of the send */
+ struct mbuf *mat;
+
+ mat = m;
+ ca->sndlen = 0;
+ while (m) {
+ ca->sndlen += SCTP_BUF_LEN(m);
+ m = SCTP_BUF_NEXT(m);
+ }
+ ca->m = mat;
+ }
+ ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
+ SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
+ SCTP_ASOC_ANY_STATE,
+ (void *)ca, 0,
+ sctp_sendall_completes, inp, 1);
+ if (ret) {
+ SCTP_PRINTF("Failed to initiate iterator for sendall\n");
+ SCTP_FREE(ca, SCTP_M_COPYAL);
+ SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
+ return (EFAULT);
+ }
+ return (0);
+}
+
+
+void
+sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
+{
+ struct sctp_tmit_chunk *chk, *nchk;
+
+ chk = TAILQ_FIRST(&asoc->control_send_queue);
+ while (chk) {
+ nchk = TAILQ_NEXT(chk, sctp_next);
+ if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
+ TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
+ if (chk->data) {
+ sctp_m_freem(chk->data);
+ chk->data = NULL;
+ }
+ asoc->ctrl_queue_cnt--;
+ sctp_free_a_chunk(stcb, chk);
+ }
+ chk = nchk;
+ }
+}
+
+void
+sctp_toss_old_asconf(struct sctp_tcb *stcb)
+{
+ struct sctp_association *asoc;
+ struct sctp_tmit_chunk *chk, *chk_tmp;
+ struct sctp_asconf_chunk *acp;
+
+ asoc = &stcb->asoc;
+ for (chk = TAILQ_FIRST(&asoc->asconf_send_queue); chk != NULL;
+ chk = chk_tmp) {
+ /* get next chk */
+ chk_tmp = TAILQ_NEXT(chk, sctp_next);
+ /* find SCTP_ASCONF chunk in queue */
+ if (chk->rec.chunk_id.id == SCTP_ASCONF) {
+ if (chk->data) {
+ acp = mtod(chk->data, struct sctp_asconf_chunk *);
+ if (compare_with_wrap(ntohl(acp->serial_number), stcb->asoc.asconf_seq_out_acked, MAX_SEQ)) {
+ /* Not Acked yet */
+ break;
+ }
+ }
+ TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
+ if (chk->data) {
+ sctp_m_freem(chk->data);
+ chk->data = NULL;
+ }
+ asoc->ctrl_queue_cnt--;
+ sctp_free_a_chunk(stcb, chk);
+ }
+ }
+}
+
+
+static void
+sctp_clean_up_datalist(struct sctp_tcb *stcb,
+ struct sctp_association *asoc,
+ struct sctp_tmit_chunk **data_list,
+ int bundle_at,
+ struct sctp_nets *net)
+{
+ int i;
+ struct sctp_tmit_chunk *tp1;
+
+ for (i = 0; i < bundle_at; i++) {
+ /* off of the send queue */
+ TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
+ asoc->send_queue_cnt--;
+ if (i > 0) {
+ /*
+ * Any chunk NOT 0 you zap the time chunk 0 gets
+ * zapped or set based on if a RTO measurment is
+ * needed.
+ */
+ data_list[i]->do_rtt = 0;
+ }
+ /* record time */
+ data_list[i]->sent_rcv_time = net->last_sent_time;
+ data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
+ if (data_list[i]->whoTo == NULL) {
+ data_list[i]->whoTo = net;
+ atomic_add_int(&net->ref_count, 1);
+ }
+ /* on to the sent queue */
+ tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
+ if ((tp1) && (compare_with_wrap(tp1->rec.data.TSN_seq,
+ data_list[i]->rec.data.TSN_seq, MAX_TSN))) {
+ struct sctp_tmit_chunk *tpp;
+
+ /* need to move back */
+ back_up_more:
+ tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
+ if (tpp == NULL) {
+ TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
+ goto all_done;
+ }
+ tp1 = tpp;
+ if (compare_with_wrap(tp1->rec.data.TSN_seq,
+ data_list[i]->rec.data.TSN_seq, MAX_TSN)) {
+ goto back_up_more;
+ }
+ TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
+ } else {
+ TAILQ_INSERT_TAIL(&asoc->sent_queue,
+ data_list[i],
+ sctp_next);
+ }
+all_done:
+ /* This does not lower until the cum-ack passes it */
+ asoc->sent_queue_cnt++;
+ if ((asoc->peers_rwnd <= 0) &&
+ (asoc->total_flight == 0) &&
+ (bundle_at == 1)) {
+ /* Mark the chunk as being a window probe */
+ SCTP_STAT_INCR(sctps_windowprobed);
+ }
+#ifdef SCTP_AUDITING_ENABLED
+ sctp_audit_log(0xC2, 3);
+#endif
+ data_list[i]->sent = SCTP_DATAGRAM_SENT;
+ data_list[i]->snd_count = 1;
+ data_list[i]->rec.data.chunk_was_revoked = 0;
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
+ sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
+ data_list[i]->whoTo->flight_size,
+ data_list[i]->book_size,
+ (uintptr_t) data_list[i]->whoTo,
+ data_list[i]->rec.data.TSN_seq);
+ }
+ sctp_flight_size_increase(data_list[i]);
+ sctp_total_flight_increase(stcb, data_list[i]);
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
+ sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
+ asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
+ }
+ asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
+ (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
+ if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
+ /* SWS sender side engages */
+ asoc->peers_rwnd = 0;
+ }
+ }
+}
+
+static void
+sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc)
+{
+ struct sctp_tmit_chunk *chk, *nchk;
+
+ for (chk = TAILQ_FIRST(&asoc->control_send_queue);
+ chk; chk = nchk) {
+ nchk = TAILQ_NEXT(chk, sctp_next);
+ if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
+ (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
+ (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
+ (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
+ (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
+ (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
+ (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
+ (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
+ (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
+ (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
+ (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
+ (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
+ /* Stray chunks must be cleaned up */
+ clean_up_anyway:
+ TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
+ if (chk->data) {
+ sctp_m_freem(chk->data);
+ chk->data = NULL;
+ }
+ asoc->ctrl_queue_cnt--;
+ if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
+ asoc->fwd_tsn_cnt--;
+ sctp_free_a_chunk(stcb, chk);
+ } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
+ /* special handling, we must look into the param */
+ if (chk != asoc->str_reset) {
+ goto clean_up_anyway;
+ }
+ }
+ }
+}
+
+
+static int
+sctp_can_we_split_this(struct sctp_tcb *stcb,
+ uint32_t length,
+ uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
+{
+ /*
+ * Make a decision on if I should split a msg into multiple parts.
+ * This is only asked of incomplete messages.
+ */
+ if (eeor_on) {
+ /*
+ * If we are doing EEOR we need to always send it if its the
+ * entire thing, since it might be all the guy is putting in
+ * the hopper.
+ */
+ if (goal_mtu >= length) {
+ /*-
+ * If we have data outstanding,
+ * we get another chance when the sack
+ * arrives to transmit - wait for more data
+ */
+ if (stcb->asoc.total_flight == 0) {
+ /*
+ * If nothing is in flight, we zero the
+ * packet counter.
+ */
+ return (length);
+ }
+ return (0);
+
+ } else {
+ /* You can fill the rest */
+ return (goal_mtu);
+ }
+ }
+ /*-
+ * For those strange folk that make the send buffer
+ * smaller than our fragmentation point, we can't
+ * get a full msg in so we have to allow splitting.
+ */
+ if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
+ return (length);
+ }
+ if ((length <= goal_mtu) ||
+ ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
+ /* Sub-optimial residual don't split in non-eeor mode. */
+ return (0);
+ }
+ /*
+ * If we reach here length is larger than the goal_mtu. Do we wish
+ * to split it for the sake of packet putting together?
+ */
+ if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
+ /* Its ok to split it */
+ return (min(goal_mtu, frag_point));
+ }
+ /* Nope, can't split */
+ return (0);
+
+}
+
+static uint32_t
+sctp_move_to_outqueue(struct sctp_tcb *stcb,
+ struct sctp_stream_out *strq,
+ uint32_t goal_mtu,
+ uint32_t frag_point,
+ int *locked,
+ int *giveup,
+ int eeor_mode,
+ int *bail)
+{
+ /* Move from the stream to the send_queue keeping track of the total */
+ struct sctp_association *asoc;
+ struct sctp_stream_queue_pending *sp;
+ struct sctp_tmit_chunk *chk;
+ struct sctp_data_chunk *dchkh;
+ uint32_t to_move, length;
+ uint8_t rcv_flags = 0;
+ uint8_t some_taken;
+ uint8_t send_lock_up = 0;
+
+ SCTP_TCB_LOCK_ASSERT(stcb);
+ asoc = &stcb->asoc;
+one_more_time:
+ /* sa_ignore FREED_MEMORY */
+ sp = TAILQ_FIRST(&strq->outqueue);
+ if (sp == NULL) {
+ *locked = 0;
+ if (send_lock_up == 0) {
+ SCTP_TCB_SEND_LOCK(stcb);
+ send_lock_up = 1;
+ }
+ sp = TAILQ_FIRST(&strq->outqueue);
+ if (sp) {
+ goto one_more_time;
+ }
+ if (strq->last_msg_incomplete) {
+ SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
+ strq->stream_no,
+ strq->last_msg_incomplete);
+ strq->last_msg_incomplete = 0;
+ }
+ to_move = 0;
+ if (send_lock_up) {
+ SCTP_TCB_SEND_UNLOCK(stcb);
+ send_lock_up = 0;
+ }
+ goto out_of;
+ }
+ if ((sp->msg_is_complete) && (sp->length == 0)) {
+ if (sp->sender_all_done) {
+ /*
+ * We are doing differed cleanup. Last time through
+ * when we took all the data the sender_all_done was
+ * not set.
+ */
+ if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
+ SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
+ SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
+ sp->sender_all_done,
+ sp->length,
+ sp->msg_is_complete,
+ sp->put_last_out,
+ send_lock_up);
+ }
+ if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
+ SCTP_TCB_SEND_LOCK(stcb);
+ send_lock_up = 1;
+ }
+ atomic_subtract_int(&asoc->stream_queue_cnt, 1);
+ TAILQ_REMOVE(&strq->outqueue, sp, next);
+ if (sp->net) {
+ sctp_free_remote_addr(sp->net);
+ sp->net = NULL;
+ }
+ if (sp->data) {
+ sctp_m_freem(sp->data);
+ sp->data = NULL;
+ }
+ sctp_free_a_strmoq(stcb, sp);
+ /* we can't be locked to it */
+ *locked = 0;
+ stcb->asoc.locked_on_sending = NULL;
+ if (send_lock_up) {
+ SCTP_TCB_SEND_UNLOCK(stcb);
+ send_lock_up = 0;
+ }
+ /* back to get the next msg */
+ goto one_more_time;
+ } else {
+ /*
+ * sender just finished this but still holds a
+ * reference
+ */
+ *locked = 1;
+ *giveup = 1;
+ to_move = 0;
+ goto out_of;
+ }
+ } else {
+ /* is there some to get */
+ if (sp->length == 0) {
+ /* no */
+ *locked = 1;
+ *giveup = 1;
+ to_move = 0;
+ goto out_of;
+ } else if (sp->discard_rest) {
+ if (send_lock_up == 0) {
+ SCTP_TCB_SEND_LOCK(stcb);
+ send_lock_up = 1;
+ }
+ /* Whack down the size */
+ atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
+ if ((stcb->sctp_socket != NULL) && \
+ ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
+ (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
+ atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
+ }
+ if (sp->data) {
+ sctp_m_freem(sp->data);
+ sp->data = NULL;
+ sp->tail_mbuf = NULL;
+ }
+ sp->length = 0;
+ sp->some_taken = 1;
+ *locked = 1;
+ *giveup = 1;
+ to_move = 0;
+ goto out_of;
+ }
+ }
+ some_taken = sp->some_taken;
+ if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
+ sp->msg_is_complete = 1;
+ }
+re_look:
+ length = sp->length;
+ if (sp->msg_is_complete) {
+ /* The message is complete */
+ to_move = min(length, frag_point);
+ if (to_move == length) {
+ /* All of it fits in the MTU */
+ if (sp->some_taken) {
+ rcv_flags |= SCTP_DATA_LAST_FRAG;
+ sp->put_last_out = 1;
+ } else {
+ rcv_flags |= SCTP_DATA_NOT_FRAG;
+ sp->put_last_out = 1;
+ }
+ } else {
+ /* Not all of it fits, we fragment */
+ if (sp->some_taken == 0) {
+ rcv_flags |= SCTP_DATA_FIRST_FRAG;
+ }
+ sp->some_taken = 1;
+ }
+ } else {
+ to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
+ if (to_move) {
+ /*-
+ * We use a snapshot of length in case it
+ * is expanding during the compare.
+ */
+ uint32_t llen;
+
+ llen = length;
+ if (to_move >= llen) {
+ to_move = llen;
+ if (send_lock_up == 0) {
+ /*-
+ * We are taking all of an incomplete msg
+ * thus we need a send lock.
+ */
+ SCTP_TCB_SEND_LOCK(stcb);
+ send_lock_up = 1;
+ if (sp->msg_is_complete) {
+ /*
+ * the sender finished the
+ * msg
+ */
+ goto re_look;
+ }
+ }
+ }
+ if (sp->some_taken == 0) {
+ rcv_flags |= SCTP_DATA_FIRST_FRAG;
+ sp->some_taken = 1;
+ }
+ } else {
+ /* Nothing to take. */
+ if (sp->some_taken) {
+ *locked = 1;
+ }
+ *giveup = 1;
+ to_move = 0;
+ goto out_of;
+ }
+ }
+
+ /* If we reach here, we can copy out a chunk */
+ sctp_alloc_a_chunk(stcb, chk);
+ if (chk == NULL) {
+ /* No chunk memory */
+ *giveup = 1;
+ to_move = 0;
+ goto out_of;
+ }
+ /*
+ * Setup for unordered if needed by looking at the user sent info
+ * flags.
+ */
+ if (sp->sinfo_flags & SCTP_UNORDERED) {
+ rcv_flags |= SCTP_DATA_UNORDERED;
+ }
+ if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) ||
+ ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) {
+ rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
+ }
+ /* clear out the chunk before setting up */
+ memset(chk, 0, sizeof(*chk));
+ chk->rec.data.rcv_flags = rcv_flags;
+
+ if (to_move >= length) {
+ /* we think we can steal the whole thing */
+ if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
+ SCTP_TCB_SEND_LOCK(stcb);
+ send_lock_up = 1;
+ }
+ if (to_move < sp->length) {
+ /* bail, it changed */
+ goto dont_do_it;
+ }
+ chk->data = sp->data;
+ chk->last_mbuf = sp->tail_mbuf;
+ /* register the stealing */
+ sp->data = sp->tail_mbuf = NULL;
+ } else {
+ struct mbuf *m;
+
+dont_do_it:
+ chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_DONTWAIT);
+ chk->last_mbuf = NULL;
+ if (chk->data == NULL) {
+ sp->some_taken = some_taken;
+ sctp_free_a_chunk(stcb, chk);
+ *bail = 1;
+ to_move = 0;
+ goto out_of;
+ }
+#ifdef SCTP_MBUF_LOGGING
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
+ struct mbuf *mat;
+
+ mat = chk->data;
+ while (mat) {
+ if (SCTP_BUF_IS_EXTENDED(mat)) {
+ sctp_log_mb(mat, SCTP_MBUF_ICOPY);
+ }
+ mat = SCTP_BUF_NEXT(mat);
+ }
+ }
+#endif
+ /* Pull off the data */
+ m_adj(sp->data, to_move);
+ /* Now lets work our way down and compact it */
+ m = sp->data;
+ while (m && (SCTP_BUF_LEN(m) == 0)) {
+ sp->data = SCTP_BUF_NEXT(m);
+ SCTP_BUF_NEXT(m) = NULL;
+ if (sp->tail_mbuf == m) {
+ /*-
+ * Freeing tail? TSNH since
+ * we supposedly were taking less
+ * than the sp->length.
+ */
+#ifdef INVARIANTS
+ panic("Huh, freing tail? - TSNH");
+#else
+ SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
+ sp->tail_mbuf = sp->data = NULL;
+ sp->length = 0;
+#endif
+
+ }
+ sctp_m_free(m);
+ m = sp->data;
+ }
+ }
+ if (SCTP_BUF_IS_EXTENDED(chk->data)) {
+ chk->copy_by_ref = 1;
+ } else {
+ chk->copy_by_ref = 0;
+ }
+ /*
+ * get last_mbuf and counts of mb useage This is ugly but hopefully
+ * its only one mbuf.
+ */
+ if (chk->last_mbuf == NULL) {
+ chk->last_mbuf = chk->data;
+ while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
+ chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
+ }
+ }
+ if (to_move > length) {
+ /*- This should not happen either
+ * since we always lower to_move to the size
+ * of sp->length if its larger.
+ */
+#ifdef INVARIANTS
+ panic("Huh, how can to_move be larger?");
+#else
+ SCTP_PRINTF("Huh, how can to_move be larger?\n");
+ sp->length = 0;
+#endif
+ } else {
+ atomic_subtract_int(&sp->length, to_move);
+ }
+ if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) {
+ /* Not enough room for a chunk header, get some */
+ struct mbuf *m;
+
+ m = sctp_get_mbuf_for_msg(1, 0, M_DONTWAIT, 0, MT_DATA);
+ if (m == NULL) {
+ /*
+ * we're in trouble here. _PREPEND below will free
+ * all the data if there is no leading space, so we
+ * must put the data back and restore.
+ */
+ if (send_lock_up == 0) {
+ SCTP_TCB_SEND_LOCK(stcb);
+ send_lock_up = 1;
+ }
+ if (chk->data == NULL) {
+ /* unsteal the data */
+ sp->data = chk->data;
+ sp->tail_mbuf = chk->last_mbuf;
+ } else {
+ struct mbuf *m_tmp;
+
+ /* reassemble the data */
+ m_tmp = sp->data;
+ sp->data = chk->data;
+ SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
+ }
+ sp->some_taken = some_taken;
+ atomic_add_int(&sp->length, to_move);
+ chk->data = NULL;
+ *bail = 1;
+ sctp_free_a_chunk(stcb, chk);
+ to_move = 0;
+ goto out_of;
+ } else {
+ SCTP_BUF_LEN(m) = 0;
+ SCTP_BUF_NEXT(m) = chk->data;
+ chk->data = m;
+ M_ALIGN(chk->data, 4);
+ }
+ }
+ SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_DONTWAIT);
+ if (chk->data == NULL) {
+ /* HELP, TSNH since we assured it would not above? */
+#ifdef INVARIANTS
+ panic("prepend failes HELP?");
+#else
+ SCTP_PRINTF("prepend fails HELP?\n");
+ sctp_free_a_chunk(stcb, chk);
+#endif
+ *bail = 1;
+ to_move = 0;
+ goto out_of;
+ }
+ sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
+ chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk));
+ chk->book_size_scale = 0;
+ chk->sent = SCTP_DATAGRAM_UNSENT;
+
+ chk->flags = 0;
+ chk->asoc = &stcb->asoc;
+ chk->pad_inplace = 0;
+ chk->no_fr_allowed = 0;
+ chk->rec.data.stream_seq = sp->strseq;
+ chk->rec.data.stream_number = sp->stream;
+ chk->rec.data.payloadtype = sp->ppid;
+ chk->rec.data.context = sp->context;
+ chk->rec.data.doing_fast_retransmit = 0;
+ chk->rec.data.ect_nonce = 0; /* ECN Nonce */
+
+ chk->rec.data.timetodrop = sp->ts;
+ chk->flags = sp->act_flags;
+
+ if (sp->net) {
+ chk->whoTo = sp->net;
+ atomic_add_int(&chk->whoTo->ref_count, 1);
+ } else
+ chk->whoTo = NULL;
+
+ if (sp->holds_key_ref) {
+ chk->auth_keyid = sp->auth_keyid;
+ sctp_auth_key_acquire(stcb, chk->auth_keyid);
+ chk->holds_key_ref = 1;
+ }
+ chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
+ sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
+ (uintptr_t) stcb, sp->length,
+ (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
+ chk->rec.data.TSN_seq);
+ }
+ dchkh = mtod(chk->data, struct sctp_data_chunk *);
+ /*
+ * Put the rest of the things in place now. Size was done earlier in
+ * previous loop prior to padding.
+ */
+
+#ifdef SCTP_ASOCLOG_OF_TSNS
+ SCTP_TCB_LOCK_ASSERT(stcb);
+ if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
+ asoc->tsn_out_at = 0;
+ asoc->tsn_out_wrapped = 1;
+ }
+ asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
+ asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
+ asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
+ asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
+ asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
+ asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
+ asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
+ asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
+ asoc->tsn_out_at++;
+#endif
+
+ dchkh->ch.chunk_type = SCTP_DATA;
+ dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
+ dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
+ dchkh->dp.stream_id = htons(strq->stream_no);
+ dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
+ dchkh->dp.protocol_id = chk->rec.data.payloadtype;
+ dchkh->ch.chunk_length = htons(chk->send_size);
+ /* Now advance the chk->send_size by the actual pad needed. */
+ if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
+ /* need a pad */
+ struct mbuf *lm;
+ int pads;
+
+ pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
+ if (sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf) == 0) {
+ chk->pad_inplace = 1;
+ }
+ if ((lm = SCTP_BUF_NEXT(chk->last_mbuf)) != NULL) {
+ /* pad added an mbuf */
+ chk->last_mbuf = lm;
+ }
+ chk->send_size += pads;
+ }
+ /* We only re-set the policy if it is on */
+ if (sp->pr_sctp_on) {
+ sctp_set_prsctp_policy(sp);
+ asoc->pr_sctp_cnt++;
+ chk->pr_sctp_on = 1;
+ } else {
+ chk->pr_sctp_on = 0;
+ }
+ if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
+ /* All done pull and kill the message */
+ atomic_subtract_int(&asoc->stream_queue_cnt, 1);
+ if (sp->put_last_out == 0) {
+ SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
+ SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
+ sp->sender_all_done,
+ sp->length,
+ sp->msg_is_complete,
+ sp->put_last_out,
+ send_lock_up);
+ }
+ if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
+ SCTP_TCB_SEND_LOCK(stcb);
+ send_lock_up = 1;
+ }
+ TAILQ_REMOVE(&strq->outqueue, sp, next);
+ if (sp->net) {
+ sctp_free_remote_addr(sp->net);
+ sp->net = NULL;
+ }
+ if (sp->data) {
+ sctp_m_freem(sp->data);
+ sp->data = NULL;
+ }
+ sctp_free_a_strmoq(stcb, sp);
+
+ /* we can't be locked to it */
+ *locked = 0;
+ stcb->asoc.locked_on_sending = NULL;
+ } else {
+ /* more to go, we are locked */
+ *locked = 1;
+ }
+ asoc->chunks_on_out_queue++;
+ TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
+ asoc->send_queue_cnt++;
+out_of:
+ if (send_lock_up) {
+ SCTP_TCB_SEND_UNLOCK(stcb);
+ send_lock_up = 0;
+ }
+ return (to_move);
+}
+
+
+static struct sctp_stream_out *
+sctp_select_a_stream(struct sctp_tcb *stcb, struct sctp_association *asoc)
+{
+ struct sctp_stream_out *strq;
+
+ /* Find the next stream to use */
+ if (asoc->last_out_stream == NULL) {
+ strq = TAILQ_FIRST(&asoc->out_wheel);
+ } else {
+ strq = TAILQ_NEXT(asoc->last_out_stream, next_spoke);
+ if (strq == NULL) {
+ strq = TAILQ_FIRST(&asoc->out_wheel);
+ }
+ }
+ return (strq);
+}
+
+
+static void
+sctp_fill_outqueue(struct sctp_tcb *stcb,
+ struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now)
+{
+ struct sctp_association *asoc;
+ struct sctp_stream_out *strq, *strqn;
+ int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
+ int locked, giveup;
+ struct sctp_stream_queue_pending *sp;
+
+ SCTP_TCB_LOCK_ASSERT(stcb);
+ asoc = &stcb->asoc;
+#ifdef INET6
+ if (net->ro._l_addr.sin6.sin6_family == AF_INET6) {
+ goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
+ } else {
+ /* ?? not sure what else to do */
+ goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
+ }
+#else
+ goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
+#endif
+ /* Need an allowance for the data chunk header too */
+ goal_mtu -= sizeof(struct sctp_data_chunk);
+
+ /* must make even word boundary */
+ goal_mtu &= 0xfffffffc;
+ if (asoc->locked_on_sending) {
+ /* We are stuck on one stream until the message completes. */
+ strq = asoc->locked_on_sending;
+ locked = 1;
+ } else {
+ strq = sctp_select_a_stream(stcb, asoc);
+ locked = 0;
+ }
+ strqn = strq;
+ while ((goal_mtu > 0) && strq) {
+ sp = TAILQ_FIRST(&strq->outqueue);
+ if (sp == NULL) {
+ break;
+ }
+ /**
+ * Honor the users' choice if given. If not given,
+ * pull it only to the primary path in case of not using
+ * CMT.
+ */
+ if (((sp->net != NULL) &&
+ (sp->net != net)) ||
+ ((sp->net == NULL) &&
+ (asoc->sctp_cmt_on_off == 0) &&
+ (asoc->primary_destination != net))) {
+ /* Do not pull to this network */
+ if (locked) {
+ break;
+ } else {
+ strq = sctp_select_a_stream(stcb, asoc);
+ if (strq == NULL)
+ /* none left */
+ break;
+ if (strqn == strq) {
+ /* I have circled */
+ break;
+ }
+ continue;
+ }
+ }
+ giveup = 0;
+ bail = 0;
+ moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
+ &giveup, eeor_mode, &bail);
+ if (moved_how_much)
+ asoc->last_out_stream = strq;
+
+ if (locked) {
+ asoc->locked_on_sending = strq;
+ if ((moved_how_much == 0) || (giveup) || bail)
+ /* no more to move for now */
+ break;
+ } else {
+ asoc->locked_on_sending = NULL;
+ if (TAILQ_EMPTY(&strq->outqueue)) {
+ if (strq == strqn) {
+ /* Must move start to next one */
+ strqn = TAILQ_NEXT(strq, next_spoke);
+ if (strqn == NULL) {
+ strqn = TAILQ_FIRST(&asoc->out_wheel);
+ if (strqn == NULL) {
+ break;
+ }
+ }
+ }
+ sctp_remove_from_wheel(stcb, asoc, strq, 0);
+ }
+ if ((giveup) || bail) {
+ break;
+ }
+ strq = sctp_select_a_stream(stcb, asoc);
+ if (strq == NULL) {
+ break;
+ }
+ }
+ total_moved += moved_how_much;
+ goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
+ goal_mtu &= 0xfffffffc;
+ }
+ if (bail)
+ *quit_now = 1;
+
+ if (total_moved == 0) {
+ if ((stcb->asoc.sctp_cmt_on_off == 0) &&
+ (net == stcb->asoc.primary_destination)) {
+ /* ran dry for primary network net */
+ SCTP_STAT_INCR(sctps_primary_randry);
+ } else if (stcb->asoc.sctp_cmt_on_off == 1) {
+ /* ran dry with CMT on */
+ SCTP_STAT_INCR(sctps_cmt_randry);
+ }
+ }
+}
+
+void
+sctp_fix_ecn_echo(struct sctp_association *asoc)
+{
+ struct sctp_tmit_chunk *chk;
+
+ TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
+ if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
+ chk->sent = SCTP_DATAGRAM_UNSENT;
+ }
+ }
+}
+
+void
+sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
+{
+ struct sctp_association *asoc;
+ struct sctp_stream_out *outs;
+ struct sctp_tmit_chunk *chk;
+ struct sctp_stream_queue_pending *sp;
+
+ if (net == NULL) {
+ return;
+ }
+ asoc = &stcb->asoc;
+ TAILQ_FOREACH(outs, &asoc->out_wheel, next_spoke) {
+ TAILQ_FOREACH(sp, &outs->outqueue, next) {
+ if (sp->net == net) {
+ sctp_free_remote_addr(sp->net);
+ sp->net = NULL;
+ }
+ }
+ }
+ TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
+ if (chk->whoTo == net) {
+ sctp_free_remote_addr(chk->whoTo);
+ chk->whoTo = NULL;
+ }
+ }
+}
+
+int
+sctp_med_chunk_output(struct sctp_inpcb *inp,
+ struct sctp_tcb *stcb,
+ struct sctp_association *asoc,
+ int *num_out,
+ int *reason_code,
+ int control_only, int from_where,
+ struct timeval *now, int *now_filled, int frag_point, int so_locked
+#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
+ SCTP_UNUSED
+#endif
+)
+{
+ /*
+ * Ok this is the generic chunk service queue. we must do the
+ * following: - Service the stream queue that is next, moving any
+ * message (note I must get a complete message i.e. FIRST/MIDDLE and
+ * LAST to the out queue in one pass) and assigning TSN's - Check to
+ * see if the cwnd/rwnd allows any output, if so we go ahead and
+ * fomulate and send the low level chunks. Making sure to combine
+ * any control in the control chunk queue also.
+ */
+ struct sctp_nets *net, *start_at, *old_start_at = NULL;
+ struct mbuf *outchain, *endoutchain;
+ struct sctp_tmit_chunk *chk, *nchk;
+
+ /* temp arrays for unlinking */
+ struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
+ int no_fragmentflg, error;
+ unsigned int max_rwnd_per_dest, max_send_per_dest;
+ int one_chunk, hbflag, skip_data_for_this_net;
+ int asconf, cookie, no_out_cnt;
+ int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
+ unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
+ int tsns_sent = 0;
+ uint32_t auth_offset = 0;
+ struct sctp_auth_chunk *auth = NULL;
+ uint16_t auth_keyid;
+ int override_ok = 1;
+ int data_auth_reqd = 0;
+
+ /*
+ * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
+ * destination.
+ */
+ int pf_hbflag = 0;
+ int quit_now = 0;
+
+ *num_out = 0;
+ auth_keyid = stcb->asoc.authinfo.active_keyid;
+
+ if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
+ (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
+ (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
+ eeor_mode = 1;
+ } else {
+ eeor_mode = 0;
+ }
+ ctl_cnt = no_out_cnt = asconf = cookie = 0;
+ /*
+ * First lets prime the pump. For each destination, if there is room
+ * in the flight size, attempt to pull an MTU's worth out of the
+ * stream queues into the general send_queue
+ */
+#ifdef SCTP_AUDITING_ENABLED
+ sctp_audit_log(0xC2, 2);
+#endif
+ SCTP_TCB_LOCK_ASSERT(stcb);
+ hbflag = 0;
+ if ((control_only) || (asoc->stream_reset_outstanding))
+ no_data_chunks = 1;
+ else
+ no_data_chunks = 0;
+
+ /* Nothing to possible to send? */
+ if (TAILQ_EMPTY(&asoc->control_send_queue) &&
+ TAILQ_EMPTY(&asoc->asconf_send_queue) &&
+ TAILQ_EMPTY(&asoc->send_queue) &&
+ TAILQ_EMPTY(&asoc->out_wheel)) {
+ *reason_code = 9;
+ return (0);
+ }
+ if (asoc->peers_rwnd == 0) {
+ /* No room in peers rwnd */
+ *reason_code = 1;
+ if (asoc->total_flight > 0) {
+ /* we are allowed one chunk in flight */
+ no_data_chunks = 1;
+ }
+ }
+ max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
+ if (stcb->sctp_socket)
+ max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
+ else
+ max_send_per_dest = 0;
+ if ((no_data_chunks == 0) && (!TAILQ_EMPTY(&asoc->out_wheel))) {
+ TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
+ /*
+ * This for loop we are in takes in each net, if
+ * its's got space in cwnd and has data sent to it
+ * (when CMT is off) then it calls
+ * sctp_fill_outqueue for the net. This gets data on
+ * the send queue for that network.
+ *
+ * In sctp_fill_outqueue TSN's are assigned and data is
+ * copied out of the stream buffers. Note mostly
+ * copy by reference (we hope).
+ */
+ net->window_probe = 0;
+ if ((net->dest_state & SCTP_ADDR_NOT_REACHABLE) ||
+ (net->dest_state & SCTP_ADDR_UNCONFIRMED)) {
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
+ sctp_log_cwnd(stcb, net, 1,
+ SCTP_CWND_LOG_FILL_OUTQ_CALLED);
+ }
+ continue;
+ }
+ if ((asoc->sctp_cmt_on_off == 0) &&
+ (asoc->primary_destination != net) &&
+ (net->ref_count < 2)) {
+ /* nothing can be in queue for this guy */
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
+ sctp_log_cwnd(stcb, net, 2,
+ SCTP_CWND_LOG_FILL_OUTQ_CALLED);
+ }
+ continue;
+ }
+ if (net->flight_size >= net->cwnd) {
+ /* skip this network, no room - can't fill */
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
+ sctp_log_cwnd(stcb, net, 3,
+ SCTP_CWND_LOG_FILL_OUTQ_CALLED);
+ }
+ continue;
+ }
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
+ sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
+ }
+ sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now);
+ if (quit_now) {
+ /* memory alloc failure */
+ no_data_chunks = 1;
+ break;
+ }
+ }
+ }
+ /* now service each destination and send out what we can for it */
+ /* Nothing to send? */
+ if (TAILQ_EMPTY(&asoc->control_send_queue) &&
+ TAILQ_EMPTY(&asoc->asconf_send_queue) &&
+ TAILQ_EMPTY(&asoc->send_queue)) {
+ *reason_code = 8;
+ return (0);
+ }
+ if (asoc->sctp_cmt_on_off == 1) {
+ /* get the last start point */
+ start_at = asoc->last_net_cmt_send_started;
+ if (start_at == NULL) {
+ /* null so to beginning */
+ start_at = TAILQ_FIRST(&asoc->nets);
+ } else {
+ start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
+ if (start_at == NULL) {
+ start_at = TAILQ_FIRST(&asoc->nets);
+ }
+ }
+ asoc->last_net_cmt_send_started = start_at;
+ } else {
+ start_at = TAILQ_FIRST(&asoc->nets);
+ }
+ old_start_at = NULL;
+again_one_more_time:
+ for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
+ /* how much can we send? */
+ /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
+ if (old_start_at && (old_start_at == net)) {
+ /* through list ocmpletely. */
+ break;
+ }
+ tsns_sent = 0xa;
+ if ((asoc->sctp_cmt_on_off == 0) &&
+ (asoc->primary_destination != net) &&
+ (net->ref_count < 2)) {
+ /*
+ * Ref-count of 1 so we cannot have data or control
+ * queued to this address. Skip it (non-CMT).
+ */
+ continue;
+ }
+ if (TAILQ_EMPTY(&asoc->control_send_queue) &&
+ TAILQ_EMPTY(&asoc->asconf_send_queue) &&
+ (net->flight_size >= net->cwnd)) {
+ /*
+ * Nothing on control or asconf and flight is full,
+ * we can skip even in the CMT case.
+ */
+ continue;
+ }
+ ctl_cnt = bundle_at = 0;
+ endoutchain = outchain = NULL;
+ no_fragmentflg = 1;
+ one_chunk = 0;
+ if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
+ skip_data_for_this_net = 1;
+ } else {
+ skip_data_for_this_net = 0;
+ }
+ if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) {
+ /*
+ * if we have a route and an ifp check to see if we
+ * have room to send to this guy
+ */
+ struct ifnet *ifp;
+
+ ifp = net->ro.ro_rt->rt_ifp;
+ if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) {
+ SCTP_STAT_INCR(sctps_ifnomemqueued);
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
+ sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED);
+ }
+ continue;
+ }
+ }
+ switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
+ case AF_INET:
+ mtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
+ break;
+#ifdef INET6
+ case AF_INET6:
+ mtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
+ break;
+#endif
+ default:
+ /* TSNH */
+ mtu = net->mtu;
+ break;
+ }
+ mx_mtu = mtu;
+ to_out = 0;
+ if (mtu > asoc->peers_rwnd) {
+ if (asoc->total_flight > 0) {
+ /* We have a packet in flight somewhere */
+ r_mtu = asoc->peers_rwnd;
+ } else {
+ /* We are always allowed to send one MTU out */
+ one_chunk = 1;
+ r_mtu = mtu;
+ }
+ } else {
+ r_mtu = mtu;
+ }
+ /************************/
+ /* ASCONF transmission */
+ /************************/
+ /* Now first lets go through the asconf queue */
+ for (chk = TAILQ_FIRST(&asoc->asconf_send_queue);
+ chk; chk = nchk) {
+ nchk = TAILQ_NEXT(chk, sctp_next);
+ if (chk->rec.chunk_id.id != SCTP_ASCONF) {
+ continue;
+ }
+ if (chk->whoTo != net) {
+ /*
+ * No, not sent to the network we are
+ * looking at
+ */
+ break;
+ }
+ if (chk->data == NULL) {
+ break;
+ }
+ if (chk->sent != SCTP_DATAGRAM_UNSENT &&
+ chk->sent != SCTP_DATAGRAM_RESEND) {
+ break;
+ }
+ /*
+ * if no AUTH is yet included and this chunk
+ * requires it, make sure to account for it. We
+ * don't apply the size until the AUTH chunk is
+ * actually added below in case there is no room for
+ * this chunk. NOTE: we overload the use of "omtu"
+ * here
+ */
+ if ((auth == NULL) &&
+ sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
+ stcb->asoc.peer_auth_chunks)) {
+ omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
+ } else
+ omtu = 0;
+ /* Here we do NOT factor the r_mtu */
+ if ((chk->send_size < (int)(mtu - omtu)) ||
+ (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
+ /*
+ * We probably should glom the mbuf chain
+ * from the chk->data for control but the
+ * problem is it becomes yet one more level
+ * of tracking to do if for some reason
+ * output fails. Then I have got to
+ * reconstruct the merged control chain.. el
+ * yucko.. for now we take the easy way and
+ * do the copy
+ */
+ /*
+ * Add an AUTH chunk, if chunk requires it
+ * save the offset into the chain for AUTH
+ */
+ if ((auth == NULL) &&
+ (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
+ stcb->asoc.peer_auth_chunks))) {
+ outchain = sctp_add_auth_chunk(outchain,
+ &endoutchain,
+ &auth,
+ &auth_offset,
+ stcb,
+ chk->rec.chunk_id.id);
+ SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+ }
+ outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
+ (int)chk->rec.chunk_id.can_take_data,
+ chk->send_size, chk->copy_by_ref);
+ if (outchain == NULL) {
+ *reason_code = 8;
+ SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+ return (ENOMEM);
+ }
+ SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+ /* update our MTU size */
+ if (mtu > (chk->send_size + omtu))
+ mtu -= (chk->send_size + omtu);
+ else
+ mtu = 0;
+ to_out += (chk->send_size + omtu);
+ /* Do clear IP_DF ? */
+ if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
+ no_fragmentflg = 0;
+ }
+ if (chk->rec.chunk_id.can_take_data)
+ chk->data = NULL;
+ /*
+ * set hb flag since we can use these for
+ * RTO
+ */
+ hbflag = 1;
+ asconf = 1;
+ /*
+ * should sysctl this: don't bundle data
+ * with ASCONF since it requires AUTH
+ */
+ no_data_chunks = 1;
+ chk->sent = SCTP_DATAGRAM_SENT;
+ chk->snd_count++;
+ if (mtu == 0) {
+ /*
+ * Ok we are out of room but we can
+ * output without effecting the
+ * flight size since this little guy
+ * is a control only packet.
+ */
+ sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
+ /*
+ * do NOT clear the asconf flag as
+ * it is used to do appropriate
+ * source address selection.
+ */
+ if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
+ (struct sockaddr *)&net->ro._l_addr,
+ outchain, auth_offset, auth,
+ stcb->asoc.authinfo.active_keyid,
+ no_fragmentflg, 0, NULL, asconf,
+ inp->sctp_lport, stcb->rport,
+ htonl(stcb->asoc.peer_vtag),
+ net->port, so_locked, NULL))) {
+ if (error == ENOBUFS) {
+ asoc->ifp_had_enobuf = 1;
+ SCTP_STAT_INCR(sctps_lowlevelerr);
+ }
+ if (from_where == 0) {
+ SCTP_STAT_INCR(sctps_lowlevelerrusr);
+ }
+ if (*now_filled == 0) {
+ (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
+ *now_filled = 1;
+ *now = net->last_sent_time;
+ } else {
+ net->last_sent_time = *now;
+ }
+ hbflag = 0;
+ /* error, could not output */
+ if (error == EHOSTUNREACH) {
+ /*
+ * Destination went
+ * unreachable
+ * during this send
+ */
+ sctp_move_chunks_from_net(stcb, net);
+ }
+ *reason_code = 7;
+ continue;
+ } else
+ asoc->ifp_had_enobuf = 0;
+ if (*now_filled == 0) {
+ (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
+ *now_filled = 1;
+ *now = net->last_sent_time;
+ } else {
+ net->last_sent_time = *now;
+ }
+ hbflag = 0;
+ /*
+ * increase the number we sent, if a
+ * cookie is sent we don't tell them
+ * any was sent out.
+ */
+ outchain = endoutchain = NULL;
+ auth = NULL;
+ auth_offset = 0;
+ if (!no_out_cnt)
+ *num_out += ctl_cnt;
+ /* recalc a clean slate and setup */
+ if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
+ mtu = (net->mtu - SCTP_MIN_OVERHEAD);
+ } else {
+ mtu = (net->mtu - SCTP_MIN_V4_OVERHEAD);
+ }
+ to_out = 0;
+ no_fragmentflg = 1;
+ }
+ }
+ }
+ /************************/
+ /* Control transmission */
+ /************************/
+ /* Now first lets go through the control queue */
+ for (chk = TAILQ_FIRST(&asoc->control_send_queue);
+ chk; chk = nchk) {
+ nchk = TAILQ_NEXT(chk, sctp_next);
+ if (chk->whoTo != net) {
+ /*
+ * No, not sent to the network we are
+ * looking at
+ */
+ continue;
+ }
+ if (chk->data == NULL) {
+ continue;
+ }
+ if (chk->sent != SCTP_DATAGRAM_UNSENT) {
+ /*
+ * It must be unsent. Cookies and ASCONF's
+ * hang around but there timers will force
+ * when marked for resend.
+ */
+ continue;
+ }
+ /*
+ * if no AUTH is yet included and this chunk
+ * requires it, make sure to account for it. We
+ * don't apply the size until the AUTH chunk is
+ * actually added below in case there is no room for
+ * this chunk. NOTE: we overload the use of "omtu"
+ * here
+ */
+ if ((auth == NULL) &&
+ sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
+ stcb->asoc.peer_auth_chunks)) {
+ omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
+ } else
+ omtu = 0;
+ /* Here we do NOT factor the r_mtu */
+ if ((chk->send_size <= (int)(mtu - omtu)) ||
+ (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
+ /*
+ * We probably should glom the mbuf chain
+ * from the chk->data for control but the
+ * problem is it becomes yet one more level
+ * of tracking to do if for some reason
+ * output fails. Then I have got to
+ * reconstruct the merged control chain.. el
+ * yucko.. for now we take the easy way and
+ * do the copy
+ */
+ /*
+ * Add an AUTH chunk, if chunk requires it
+ * save the offset into the chain for AUTH
+ */
+ if ((auth == NULL) &&
+ (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
+ stcb->asoc.peer_auth_chunks))) {
+ outchain = sctp_add_auth_chunk(outchain,
+ &endoutchain,
+ &auth,
+ &auth_offset,
+ stcb,
+ chk->rec.chunk_id.id);
+ SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+ }
+ outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
+ (int)chk->rec.chunk_id.can_take_data,
+ chk->send_size, chk->copy_by_ref);
+ if (outchain == NULL) {
+ *reason_code = 8;
+ SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+ return (ENOMEM);
+ }
+ SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+ /* update our MTU size */
+ if (mtu > (chk->send_size + omtu))
+ mtu -= (chk->send_size + omtu);
+ else
+ mtu = 0;
+ to_out += (chk->send_size + omtu);
+ /* Do clear IP_DF ? */
+ if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
+ no_fragmentflg = 0;
+ }
+ if (chk->rec.chunk_id.can_take_data)
+ chk->data = NULL;
+ /* Mark things to be removed, if needed */
+ if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
+ (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
+ (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
+ (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
+ (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
+ (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
+ (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
+ (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
+ (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
+ (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
+ (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
+
+ if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
+ hbflag = 1;
+ /*
+ * JRS 5/14/07 - Set the
+ * flag to say a heartbeat
+ * is being sent.
+ */
+ pf_hbflag = 1;
+ }
+ /* remove these chunks at the end */
+ if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
+ (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
+ /* turn off the timer */
+ if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
+ sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
+ inp, stcb, net, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
+ }
+ }
+ ctl_cnt++;
+ } else {
+ /*
+ * Other chunks, since they have
+ * timers running (i.e. COOKIE) we
+ * just "trust" that it gets sent or
+ * retransmitted.
+ */
+ ctl_cnt++;
+ if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
+ cookie = 1;
+ no_out_cnt = 1;
+ }
+ chk->sent = SCTP_DATAGRAM_SENT;
+ chk->snd_count++;
+ }
+ if (mtu == 0) {
+ /*
+ * Ok we are out of room but we can
+ * output without effecting the
+ * flight size since this little guy
+ * is a control only packet.
+ */
+ if (asconf) {
+ sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
+ /*
+ * do NOT clear the asconf
+ * flag as it is used to do
+ * appropriate source
+ * address selection.
+ */
+ }
+ if (cookie) {
+ sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
+ cookie = 0;
+ }
+ if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
+ (struct sockaddr *)&net->ro._l_addr,
+ outchain,
+ auth_offset, auth,
+ stcb->asoc.authinfo.active_keyid,
+ no_fragmentflg, 0, NULL, asconf,
+ inp->sctp_lport, stcb->rport,
+ htonl(stcb->asoc.peer_vtag),
+ net->port, so_locked, NULL))) {
+ if (error == ENOBUFS) {
+ asoc->ifp_had_enobuf = 1;
+ SCTP_STAT_INCR(sctps_lowlevelerr);
+ }
+ if (from_where == 0) {
+ SCTP_STAT_INCR(sctps_lowlevelerrusr);
+ }
+ /* error, could not output */
+ if (hbflag) {
+ if (*now_filled == 0) {
+ (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
+ *now_filled = 1;
+ *now = net->last_sent_time;
+ } else {
+ net->last_sent_time = *now;
+ }
+ hbflag = 0;
+ }
+ if (error == EHOSTUNREACH) {
+ /*
+ * Destination went
+ * unreachable
+ * during this send
+ */
+ sctp_move_chunks_from_net(stcb, net);
+ }
+ *reason_code = 7;
+ continue;
+ } else
+ asoc->ifp_had_enobuf = 0;
+ /* Only HB or ASCONF advances time */
+ if (hbflag) {
+ if (*now_filled == 0) {
+ (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
+ *now_filled = 1;
+ *now = net->last_sent_time;
+ } else {
+ net->last_sent_time = *now;
+ }
+ hbflag = 0;
+ }
+ /*
+ * increase the number we sent, if a
+ * cookie is sent we don't tell them
+ * any was sent out.
+ */
+ outchain = endoutchain = NULL;
+ auth = NULL;
+ auth_offset = 0;
+ if (!no_out_cnt)
+ *num_out += ctl_cnt;
+ /* recalc a clean slate and setup */
+ if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
+ mtu = (net->mtu - SCTP_MIN_OVERHEAD);
+ } else {
+ mtu = (net->mtu - SCTP_MIN_V4_OVERHEAD);
+ }
+ to_out = 0;
+ no_fragmentflg = 1;
+ }
+ }
+ }
+ /* JRI: if dest is in PF state, do not send data to it */
+ if ((asoc->sctp_cmt_on_off == 1) &&
+ (asoc->sctp_cmt_pf > 0) &&
+ (net->dest_state & SCTP_ADDR_PF)) {
+ goto no_data_fill;
+ }
+ if (net->flight_size >= net->cwnd) {
+ goto no_data_fill;
+ }
+ if ((asoc->sctp_cmt_on_off == 1) &&
+ (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
+ (net->flight_size > max_rwnd_per_dest)) {
+ goto no_data_fill;
+ }
+ /*
+ * We need a specific accounting for the usage of the send
+ * buffer. We also need to check the number of messages per
+ * net. For now, this is better than nothing and it disabled
+ * by default...
+ */
+ if ((asoc->sctp_cmt_on_off == 1) &&
+ (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
+ (max_send_per_dest > 0) &&
+ (net->flight_size > max_send_per_dest)) {
+ goto no_data_fill;
+ }
+ /*********************/
+ /* Data transmission */
+ /*********************/
+ /*
+ * if AUTH for DATA is required and no AUTH has been added
+ * yet, account for this in the mtu now... if no data can be
+ * bundled, this adjustment won't matter anyways since the
+ * packet will be going out...
+ */
+ data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
+ stcb->asoc.peer_auth_chunks);
+ if (data_auth_reqd && (auth == NULL)) {
+ mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
+ }
+ /* now lets add any data within the MTU constraints */
+ switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
+ case AF_INET:
+ if (net->mtu > (sizeof(struct ip) + sizeof(struct sctphdr)))
+ omtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
+ else
+ omtu = 0;
+ break;
+#ifdef INET6
+ case AF_INET6:
+ if (net->mtu > (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)))
+ omtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
+ else
+ omtu = 0;
+ break;
+#endif
+ default:
+ /* TSNH */
+ omtu = 0;
+ break;
+ }
+ if ((((asoc->state & SCTP_STATE_OPEN) == SCTP_STATE_OPEN) &&
+ (skip_data_for_this_net == 0)) ||
+ (cookie)) {
+ for (chk = TAILQ_FIRST(&asoc->send_queue); chk; chk = nchk) {
+ if (no_data_chunks) {
+ /* let only control go out */
+ *reason_code = 1;
+ break;
+ }
+ if (net->flight_size >= net->cwnd) {
+ /* skip this net, no room for data */
+ *reason_code = 2;
+ break;
+ }
+ nchk = TAILQ_NEXT(chk, sctp_next);
+ if ((chk->whoTo != NULL) &&
+ (chk->whoTo != net)) {
+ /* Don't send the chunk on this net */
+ continue;
+ }
+ if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
+ /*-
+ * strange, we have a chunk that is
+ * to big for its destination and
+ * yet no fragment ok flag.
+ * Something went wrong when the
+ * PMTU changed...we did not mark
+ * this chunk for some reason?? I
+ * will fix it here by letting IP
+ * fragment it for now and printing
+ * a warning. This really should not
+ * happen ...
+ */
+ SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
+ chk->send_size, mtu);
+ chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
+ }
+ if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
+ ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
+ struct sctp_data_chunk *dchkh;
+
+ dchkh = mtod(chk->data, struct sctp_data_chunk *);
+ dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
+ }
+ if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
+ ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
+ /* ok we will add this one */
+
+ /*
+ * Add an AUTH chunk, if chunk
+ * requires it, save the offset into
+ * the chain for AUTH
+ */
+ if (data_auth_reqd) {
+ if (auth == NULL) {
+ outchain = sctp_add_auth_chunk(outchain,
+ &endoutchain,
+ &auth,
+ &auth_offset,
+ stcb,
+ SCTP_DATA);
+ auth_keyid = chk->auth_keyid;
+ override_ok = 0;
+ SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+ } else if (override_ok) {
+ /*
+ * use this data's
+ * keyid
+ */
+ auth_keyid = chk->auth_keyid;
+ override_ok = 0;
+ } else if (auth_keyid != chk->auth_keyid) {
+ /*
+ * different keyid,
+ * so done bundling
+ */
+ break;
+ }
+ }
+ outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
+ chk->send_size, chk->copy_by_ref);
+ if (outchain == NULL) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
+ if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
+ sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
+ }
+ *reason_code = 3;
+ SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+ return (ENOMEM);
+ }
+ /* upate our MTU size */
+ /* Do clear IP_DF ? */
+ if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
+ no_fragmentflg = 0;
+ }
+ /* unsigned subtraction of mtu */
+ if (mtu > chk->send_size)
+ mtu -= chk->send_size;
+ else
+ mtu = 0;
+ /* unsigned subtraction of r_mtu */
+ if (r_mtu > chk->send_size)
+ r_mtu -= chk->send_size;
+ else
+ r_mtu = 0;
+
+ to_out += chk->send_size;
+ if ((to_out > mx_mtu) && no_fragmentflg) {
+#ifdef INVARIANTS
+ panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
+#else
+ SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
+ mx_mtu, to_out);
+#endif
+ }
+ chk->window_probe = 0;
+ data_list[bundle_at++] = chk;
+ if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
+ mtu = 0;
+ break;
+ }
+ if (chk->sent == SCTP_DATAGRAM_UNSENT) {
+ if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
+ SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
+ } else {
+ SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
+ }
+ if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
+ ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
+ /*
+ * Count number of
+ * user msg's that
+ * were fragmented
+ * we do this by
+ * counting when we
+ * see a LAST
+ * fragment only.
+ */
+ SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
+ }
+ if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
+ if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
+ data_list[0]->window_probe = 1;
+ net->window_probe = 1;
+ }
+ break;
+ }
+ } else {
+ /*
+ * Must be sent in order of the
+ * TSN's (on a network)
+ */
+ break;
+ }
+ } /* for (chunk gather loop for this net) */
+ } /* if asoc.state OPEN */
+no_data_fill:
+ /* Is there something to send for this destination? */
+ if (outchain) {
+ /* We may need to start a control timer or two */
+ if (asconf) {
+ sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
+ stcb, net);
+ /*
+ * do NOT clear the asconf flag as it is
+ * used to do appropriate source address
+ * selection.
+ */
+ }
+ if (cookie) {
+ sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
+ cookie = 0;
+ }
+ /* must start a send timer if data is being sent */
+ if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
+ /*
+ * no timer running on this destination
+ * restart it.
+ */
+ sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
+ } else if ((asoc->sctp_cmt_on_off == 1) &&
+ (asoc->sctp_cmt_pf > 0) &&
+ pf_hbflag &&
+ ((net->dest_state & SCTP_ADDR_PF) == SCTP_ADDR_PF) &&
+ (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
+ /*
+ * JRS 5/14/07 - If a HB has been sent to a
+ * PF destination and no T3 timer is
+ * currently running, start the T3 timer to
+ * track the HBs that were sent.
+ */
+ sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
+ }
+ /* Now send it, if there is anything to send :> */
+ if ((error = sctp_lowlevel_chunk_output(inp,
+ stcb,
+ net,
+ (struct sockaddr *)&net->ro._l_addr,
+ outchain,
+ auth_offset,
+ auth,
+ auth_keyid,
+ no_fragmentflg,
+ bundle_at,
+ data_list[0],
+ asconf,
+ inp->sctp_lport, stcb->rport,
+ htonl(stcb->asoc.peer_vtag),
+ net->port, so_locked, NULL))) {
+ /* error, we could not output */
+ if (error == ENOBUFS) {
+ SCTP_STAT_INCR(sctps_lowlevelerr);
+ asoc->ifp_had_enobuf = 1;
+ }
+ if (from_where == 0) {
+ SCTP_STAT_INCR(sctps_lowlevelerrusr);
+ }
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
+ if (hbflag) {
+ if (*now_filled == 0) {
+ (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
+ *now_filled = 1;
+ *now = net->last_sent_time;
+ } else {
+ net->last_sent_time = *now;
+ }
+ hbflag = 0;
+ }
+ if (error == EHOSTUNREACH) {
+ /*
+ * Destination went unreachable
+ * during this send
+ */
+ sctp_move_chunks_from_net(stcb, net);
+ }
+ *reason_code = 6;
+ /*-
+ * I add this line to be paranoid. As far as
+ * I can tell the continue, takes us back to
+ * the top of the for, but just to make sure
+ * I will reset these again here.
+ */
+ ctl_cnt = bundle_at = 0;
+ continue; /* This takes us back to the
+ * for() for the nets. */
+ } else {
+ asoc->ifp_had_enobuf = 0;
+ }
+ outchain = endoutchain = NULL;
+ auth = NULL;
+ auth_offset = 0;
+ if (bundle_at || hbflag) {
+ /* For data/asconf and hb set time */
+ if (*now_filled == 0) {
+ (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
+ *now_filled = 1;
+ *now = net->last_sent_time;
+ } else {
+ net->last_sent_time = *now;
+ }
+ }
+ if (!no_out_cnt) {
+ *num_out += (ctl_cnt + bundle_at);
+ }
+ if (bundle_at) {
+ /* setup for a RTO measurement */
+ tsns_sent = data_list[0]->rec.data.TSN_seq;
+ /* fill time if not already filled */
+ if (*now_filled == 0) {
+ (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
+ *now_filled = 1;
+ *now = asoc->time_last_sent;
+ } else {
+ asoc->time_last_sent = *now;
+ }
+ data_list[0]->do_rtt = 1;
+ SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
+ sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
+ if (SCTP_BASE_SYSCTL(sctp_early_fr)) {
+ if (net->flight_size < net->cwnd) {
+ /* start or restart it */
+ if (SCTP_OS_TIMER_PENDING(&net->fr_timer.timer)) {
+ sctp_timer_stop(SCTP_TIMER_TYPE_EARLYFR, inp, stcb, net,
+ SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
+ }
+ SCTP_STAT_INCR(sctps_earlyfrstrout);
+ sctp_timer_start(SCTP_TIMER_TYPE_EARLYFR, inp, stcb, net);
+ } else {
+ /* stop it if its running */
+ if (SCTP_OS_TIMER_PENDING(&net->fr_timer.timer)) {
+ SCTP_STAT_INCR(sctps_earlyfrstpout);
+ sctp_timer_stop(SCTP_TIMER_TYPE_EARLYFR, inp, stcb, net,
+ SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
+ }
+ }
+ }
+ }
+ if (one_chunk) {
+ break;
+ }
+ }
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
+ sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
+ }
+ }
+ if (old_start_at == NULL) {
+ old_start_at = start_at;
+ start_at = TAILQ_FIRST(&asoc->nets);
+ if (old_start_at)
+ goto again_one_more_time;
+ }
+ /*
+ * At the end there should be no NON timed chunks hanging on this
+ * queue.
+ */
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
+ sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
+ }
+ if ((*num_out == 0) && (*reason_code == 0)) {
+ *reason_code = 4;
+ } else {
+ *reason_code = 5;
+ }
+ sctp_clean_up_ctl(stcb, asoc);
+ return (0);
+}
+
+void
+sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
+{
+ /*-
+ * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
+ * the control chunk queue.
+ */
+ struct sctp_chunkhdr *hdr;
+ struct sctp_tmit_chunk *chk;
+ struct mbuf *mat;
+
+ SCTP_TCB_LOCK_ASSERT(stcb);
+ sctp_alloc_a_chunk(stcb, chk);
+ if (chk == NULL) {
+ /* no memory */
+ sctp_m_freem(op_err);
+ return;
+ }
+ chk->copy_by_ref = 0;
+ SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_DONTWAIT);
+ if (op_err == NULL) {
+ sctp_free_a_chunk(stcb, chk);
+ return;
+ }
+ chk->send_size = 0;
+ mat = op_err;
+ while (mat != NULL) {
+ chk->send_size += SCTP_BUF_LEN(mat);
+ mat = SCTP_BUF_NEXT(mat);
+ }
+ chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
+ chk->rec.chunk_id.can_take_data = 1;
+ chk->sent = SCTP_DATAGRAM_UNSENT;
+ chk->snd_count = 0;
+ chk->flags = 0;
+ chk->asoc = &stcb->asoc;
+ chk->data = op_err;
+ chk->whoTo = chk->asoc->primary_destination;
+ atomic_add_int(&chk->whoTo->ref_count, 1);
+ hdr = mtod(op_err, struct sctp_chunkhdr *);
+ hdr->chunk_type = SCTP_OPERATION_ERROR;
+ hdr->chunk_flags = 0;
+ hdr->chunk_length = htons(chk->send_size);
+ TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue,
+ chk,
+ sctp_next);
+ chk->asoc->ctrl_queue_cnt++;
+}
+
+int
+sctp_send_cookie_echo(struct mbuf *m,
+ int offset,
+ struct sctp_tcb *stcb,
+ struct sctp_nets *net)
+{
+ /*-
+ * pull out the cookie and put it at the front of the control chunk
+ * queue.
+ */
+ int at;
+ struct mbuf *cookie;
+ struct sctp_paramhdr parm, *phdr;
+ struct sctp_chunkhdr *hdr;
+ struct sctp_tmit_chunk *chk;
+ uint16_t ptype, plen;
+
+ /* First find the cookie in the param area */
+ cookie = NULL;
+ at = offset + sizeof(struct sctp_init_chunk);
+
+ SCTP_TCB_LOCK_ASSERT(stcb);
+ do {
+ phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
+ if (phdr == NULL) {
+ return (-3);
+ }
+ ptype = ntohs(phdr->param_type);
+ plen = ntohs(phdr->param_length);
+ if (ptype == SCTP_STATE_COOKIE) {
+ int pad;
+
+ /* found the cookie */
+ if ((pad = (plen % 4))) {
+ plen += 4 - pad;
+ }
+ cookie = SCTP_M_COPYM(m, at, plen, M_DONTWAIT);
+ if (cookie == NULL) {
+ /* No memory */
+ return (-2);
+ }
+#ifdef SCTP_MBUF_LOGGING
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
+ struct mbuf *mat;
+
+ mat = cookie;
+ while (mat) {
+ if (SCTP_BUF_IS_EXTENDED(mat)) {
+ sctp_log_mb(mat, SCTP_MBUF_ICOPY);
+ }
+ mat = SCTP_BUF_NEXT(mat);
+ }
+ }
+#endif
+ break;
+ }
+ at += SCTP_SIZE32(plen);
+ } while (phdr);
+ if (cookie == NULL) {
+ /* Did not find the cookie */
+ return (-3);
+ }
+ /* ok, we got the cookie lets change it into a cookie echo chunk */
+
+ /* first the change from param to cookie */
+ hdr = mtod(cookie, struct sctp_chunkhdr *);
+ hdr->chunk_type = SCTP_COOKIE_ECHO;
+ hdr->chunk_flags = 0;
+ /* get the chunk stuff now and place it in the FRONT of the queue */
+ sctp_alloc_a_chunk(stcb, chk);
+ if (chk == NULL) {
+ /* no memory */
+ sctp_m_freem(cookie);
+ return (-5);
+ }
+ chk->copy_by_ref = 0;
+ chk->send_size = plen;
+ chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
+ chk->rec.chunk_id.can_take_data = 0;
+ chk->sent = SCTP_DATAGRAM_UNSENT;
+ chk->snd_count = 0;
+ chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
+ chk->asoc = &stcb->asoc;
+ chk->data = cookie;
+ chk->whoTo = chk->asoc->primary_destination;
+ atomic_add_int(&chk->whoTo->ref_count, 1);
+ TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
+ chk->asoc->ctrl_queue_cnt++;
+ return (0);
+}
+
+void
+sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
+ struct mbuf *m,
+ int offset,
+ int chk_length,
+ struct sctp_nets *net)
+{
+ /*
+ * take a HB request and make it into a HB ack and send it.
+ */
+ struct mbuf *outchain;
+ struct sctp_chunkhdr *chdr;
+ struct sctp_tmit_chunk *chk;
+
+
+ if (net == NULL)
+ /* must have a net pointer */
+ return;
+
+ outchain = SCTP_M_COPYM(m, offset, chk_length, M_DONTWAIT);
+ if (outchain == NULL) {
+ /* gak out of memory */
+ return;
+ }
+#ifdef SCTP_MBUF_LOGGING
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
+ struct mbuf *mat;
+
+ mat = outchain;
+ while (mat) {
+ if (SCTP_BUF_IS_EXTENDED(mat)) {
+ sctp_log_mb(mat, SCTP_MBUF_ICOPY);
+ }
+ mat = SCTP_BUF_NEXT(mat);
+ }
+ }
+#endif
+ chdr = mtod(outchain, struct sctp_chunkhdr *);
+ chdr->chunk_type = SCTP_HEARTBEAT_ACK;
+ chdr->chunk_flags = 0;
+ if (chk_length % 4) {
+ /* need pad */
+ uint32_t cpthis = 0;
+ int padlen;
+
+ padlen = 4 - (chk_length % 4);
+ m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
+ }
+ sctp_alloc_a_chunk(stcb, chk);
+ if (chk == NULL) {
+ /* no memory */
+ sctp_m_freem(outchain);
+ return;
+ }
+ chk->copy_by_ref = 0;
+ chk->send_size = chk_length;
+ chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
+ chk->rec.chunk_id.can_take_data = 1;
+ chk->sent = SCTP_DATAGRAM_UNSENT;
+ chk->snd_count = 0;
+ chk->flags = 0;
+ chk->asoc = &stcb->asoc;
+ chk->data = outchain;
+ chk->whoTo = net;
+ atomic_add_int(&chk->whoTo->ref_count, 1);
+ TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
+ chk->asoc->ctrl_queue_cnt++;
+}
+
+void
+sctp_send_cookie_ack(struct sctp_tcb *stcb)
+{
+ /* formulate and queue a cookie-ack back to sender */
+ struct mbuf *cookie_ack;
+ struct sctp_chunkhdr *hdr;
+ struct sctp_tmit_chunk *chk;
+
+ cookie_ack = NULL;
+ SCTP_TCB_LOCK_ASSERT(stcb);
+
+ cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER);
+ if (cookie_ack == NULL) {
+ /* no mbuf's */
+ return;
+ }
+ SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
+ sctp_alloc_a_chunk(stcb, chk);
+ if (chk == NULL) {
+ /* no memory */
+ sctp_m_freem(cookie_ack);
+ return;
+ }
+ chk->copy_by_ref = 0;
+ chk->send_size = sizeof(struct sctp_chunkhdr);
+ chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
+ chk->rec.chunk_id.can_take_data = 1;
+ chk->sent = SCTP_DATAGRAM_UNSENT;
+ chk->snd_count = 0;
+ chk->flags = 0;
+ chk->asoc = &stcb->asoc;
+ chk->data = cookie_ack;
+ if (chk->asoc->last_control_chunk_from != NULL) {
+ chk->whoTo = chk->asoc->last_control_chunk_from;
+ } else {
+ chk->whoTo = chk->asoc->primary_destination;
+ }
+ atomic_add_int(&chk->whoTo->ref_count, 1);
+ hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
+ hdr->chunk_type = SCTP_COOKIE_ACK;
+ hdr->chunk_flags = 0;
+ hdr->chunk_length = htons(chk->send_size);
+ SCTP_BUF_LEN(cookie_ack) = chk->send_size;
+ TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
+ chk->asoc->ctrl_queue_cnt++;
+ return;
+}
+
+
+void
+sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
+{
+ /* formulate and queue a SHUTDOWN-ACK back to the sender */
+ struct mbuf *m_shutdown_ack;
+ struct sctp_shutdown_ack_chunk *ack_cp;
+ struct sctp_tmit_chunk *chk;
+
+ m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
+ if (m_shutdown_ack == NULL) {
+ /* no mbuf's */
+ return;
+ }
+ SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
+ sctp_alloc_a_chunk(stcb, chk);
+ if (chk == NULL) {
+ /* no memory */
+ sctp_m_freem(m_shutdown_ack);
+ return;
+ }
+ chk->copy_by_ref = 0;
+ chk->send_size = sizeof(struct sctp_chunkhdr);
+ chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
+ chk->rec.chunk_id.can_take_data = 1;
+ chk->sent = SCTP_DATAGRAM_UNSENT;
+ chk->snd_count = 0;
+ chk->flags = 0;
+ chk->asoc = &stcb->asoc;
+ chk->data = m_shutdown_ack;
+ chk->whoTo = net;
+ atomic_add_int(&net->ref_count, 1);
+
+ ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
+ ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
+ ack_cp->ch.chunk_flags = 0;
+ ack_cp->ch.chunk_length = htons(chk->send_size);
+ SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
+ TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
+ chk->asoc->ctrl_queue_cnt++;
+ return;
+}
+
+void
+sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
+{
+ /* formulate and queue a SHUTDOWN to the sender */
+ struct mbuf *m_shutdown;
+ struct sctp_shutdown_chunk *shutdown_cp;
+ struct sctp_tmit_chunk *chk;
+
+ m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
+ if (m_shutdown == NULL) {
+ /* no mbuf's */
+ return;
+ }
+ SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
+ sctp_alloc_a_chunk(stcb, chk);
+ if (chk == NULL) {
+ /* no memory */
+ sctp_m_freem(m_shutdown);
+ return;
+ }
+ chk->copy_by_ref = 0;
+ chk->send_size = sizeof(struct sctp_shutdown_chunk);
+ chk->rec.chunk_id.id = SCTP_SHUTDOWN;
+ chk->rec.chunk_id.can_take_data = 1;
+ chk->sent = SCTP_DATAGRAM_UNSENT;
+ chk->snd_count = 0;
+ chk->flags = 0;
+ chk->asoc = &stcb->asoc;
+ chk->data = m_shutdown;
+ chk->whoTo = net;
+ atomic_add_int(&net->ref_count, 1);
+
+ shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
+ shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
+ shutdown_cp->ch.chunk_flags = 0;
+ shutdown_cp->ch.chunk_length = htons(chk->send_size);
+ shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
+ SCTP_BUF_LEN(m_shutdown) = chk->send_size;
+ TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
+ chk->asoc->ctrl_queue_cnt++;
+ return;
+}
+
+void
+sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
+{
+ /*
+ * formulate and queue an ASCONF to the peer. ASCONF parameters
+ * should be queued on the assoc queue.
+ */
+ struct sctp_tmit_chunk *chk;
+ struct mbuf *m_asconf;
+ int len;
+
+ SCTP_TCB_LOCK_ASSERT(stcb);
+
+ if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
+ (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
+ /* can't send a new one if there is one in flight already */
+ return;
+ }
+ /* compose an ASCONF chunk, maximum length is PMTU */
+ m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
+ if (m_asconf == NULL) {
+ return;
+ }
+ sctp_alloc_a_chunk(stcb, chk);
+ if (chk == NULL) {
+ /* no memory */
+ sctp_m_freem(m_asconf);
+ return;
+ }
+ chk->copy_by_ref = 0;
+ chk->data = m_asconf;
+ chk->send_size = len;
+ chk->rec.chunk_id.id = SCTP_ASCONF;
+ chk->rec.chunk_id.can_take_data = 0;
+ chk->sent = SCTP_DATAGRAM_UNSENT;
+ chk->snd_count = 0;
+ chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
+ chk->asoc = &stcb->asoc;
+ chk->whoTo = net;
+ atomic_add_int(&chk->whoTo->ref_count, 1);
+ TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
+ chk->asoc->ctrl_queue_cnt++;
+ return;
+}
+
+void
+sctp_send_asconf_ack(struct sctp_tcb *stcb)
+{
+ /*
+ * formulate and queue a asconf-ack back to sender. the asconf-ack
+ * must be stored in the tcb.
+ */
+ struct sctp_tmit_chunk *chk;
+ struct sctp_asconf_ack *ack, *latest_ack;
+ struct mbuf *m_ack, *m;
+ struct sctp_nets *net = NULL;
+
+ SCTP_TCB_LOCK_ASSERT(stcb);
+ /* Get the latest ASCONF-ACK */
+ latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
+ if (latest_ack == NULL) {
+ return;
+ }
+ if (latest_ack->last_sent_to != NULL &&
+ latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
+ /* we're doing a retransmission */
+ net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
+ if (net == NULL) {
+ /* no alternate */
+ if (stcb->asoc.last_control_chunk_from == NULL)
+ net = stcb->asoc.primary_destination;
+ else
+ net = stcb->asoc.last_control_chunk_from;
+ }
+ } else {
+ /* normal case */
+ if (stcb->asoc.last_control_chunk_from == NULL)
+ net = stcb->asoc.primary_destination;
+ else
+ net = stcb->asoc.last_control_chunk_from;
+ }
+ latest_ack->last_sent_to = net;
+
+ TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
+ if (ack->data == NULL) {
+ continue;
+ }
+ /* copy the asconf_ack */
+ m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_DONTWAIT);
+ if (m_ack == NULL) {
+ /* couldn't copy it */
+ return;
+ }
+#ifdef SCTP_MBUF_LOGGING
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
+ struct mbuf *mat;
+
+ mat = m_ack;
+ while (mat) {
+ if (SCTP_BUF_IS_EXTENDED(mat)) {
+ sctp_log_mb(mat, SCTP_MBUF_ICOPY);
+ }
+ mat = SCTP_BUF_NEXT(mat);
+ }
+ }
+#endif
+
+ sctp_alloc_a_chunk(stcb, chk);
+ if (chk == NULL) {
+ /* no memory */
+ if (m_ack)
+ sctp_m_freem(m_ack);
+ return;
+ }
+ chk->copy_by_ref = 0;
+
+ chk->whoTo = net;
+ chk->data = m_ack;
+ chk->send_size = 0;
+ /* Get size */
+ m = m_ack;
+ chk->send_size = ack->len;
+ chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
+ chk->rec.chunk_id.can_take_data = 1;
+ chk->sent = SCTP_DATAGRAM_UNSENT;
+ chk->snd_count = 0;
+ chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; /* XXX */
+ chk->asoc = &stcb->asoc;
+ atomic_add_int(&chk->whoTo->ref_count, 1);
+
+ TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
+ chk->asoc->ctrl_queue_cnt++;
+ }
+ return;
+}
+
+
+static int
+sctp_chunk_retransmission(struct sctp_inpcb *inp,
+ struct sctp_tcb *stcb,
+ struct sctp_association *asoc,
+ int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
+#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
+ SCTP_UNUSED
+#endif
+)
+{
+ /*-
+ * send out one MTU of retransmission. If fast_retransmit is
+ * happening we ignore the cwnd. Otherwise we obey the cwnd and
+ * rwnd. For a Cookie or Asconf in the control chunk queue we
+ * retransmit them by themselves.
+ *
+ * For data chunks we will pick out the lowest TSN's in the sent_queue
+ * marked for resend and bundle them all together (up to a MTU of
+ * destination). The address to send to should have been
+ * selected/changed where the retransmission was marked (i.e. in FR
+ * or t3-timeout routines).
+ */
+ struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
+ struct sctp_tmit_chunk *chk, *fwd;
+ struct mbuf *m, *endofchain;
+ struct sctp_nets *net = NULL;
+ uint32_t tsns_sent = 0;
+ int no_fragmentflg, bundle_at, cnt_thru;
+ unsigned int mtu;
+ int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
+ struct sctp_auth_chunk *auth = NULL;
+ uint32_t auth_offset = 0;
+ uint16_t auth_keyid;
+ int override_ok = 1;
+ int data_auth_reqd = 0;
+ uint32_t dmtu = 0;
+
+ SCTP_TCB_LOCK_ASSERT(stcb);
+ tmr_started = ctl_cnt = bundle_at = error = 0;
+ no_fragmentflg = 1;
+ fwd_tsn = 0;
+ *cnt_out = 0;
+ fwd = NULL;
+ endofchain = m = NULL;
+ auth_keyid = stcb->asoc.authinfo.active_keyid;
+#ifdef SCTP_AUDITING_ENABLED
+ sctp_audit_log(0xC3, 1);
+#endif
+ if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
+ (TAILQ_EMPTY(&asoc->control_send_queue))) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
+ asoc->sent_queue_retran_cnt);
+ asoc->sent_queue_cnt = 0;
+ asoc->sent_queue_cnt_removeable = 0;
+ /* send back 0/0 so we enter normal transmission */
+ *cnt_out = 0;
+ return (0);
+ }
+ TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
+ if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
+ (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
+ (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
+ if (chk->sent != SCTP_DATAGRAM_RESEND) {
+ continue;
+ }
+ if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
+ if (chk != asoc->str_reset) {
+ /*
+ * not eligible for retran if its
+ * not ours
+ */
+ continue;
+ }
+ }
+ ctl_cnt++;
+ if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
+ fwd_tsn = 1;
+ fwd = chk;
+ }
+ /*
+ * Add an AUTH chunk, if chunk requires it save the
+ * offset into the chain for AUTH
+ */
+ if ((auth == NULL) &&
+ (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
+ stcb->asoc.peer_auth_chunks))) {
+ m = sctp_add_auth_chunk(m, &endofchain,
+ &auth, &auth_offset,
+ stcb,
+ chk->rec.chunk_id.id);
+ SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+ }
+ m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
+ break;
+ }
+ }
+ one_chunk = 0;
+ cnt_thru = 0;
+ /* do we have control chunks to retransmit? */
+ if (m != NULL) {
+ /* Start a timer no matter if we suceed or fail */
+ if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
+ sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
+ } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
+ sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
+ chk->snd_count++; /* update our count */
+ if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
+ (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
+ auth_offset, auth, stcb->asoc.authinfo.active_keyid,
+ no_fragmentflg, 0, NULL, 0,
+ inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
+ chk->whoTo->port, so_locked, NULL))) {
+ SCTP_STAT_INCR(sctps_lowlevelerr);
+ return (error);
+ }
+ m = endofchain = NULL;
+ auth = NULL;
+ auth_offset = 0;
+ /*
+ * We don't want to mark the net->sent time here since this
+ * we use this for HB and retrans cannot measure RTT
+ */
+ /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
+ *cnt_out += 1;
+ chk->sent = SCTP_DATAGRAM_SENT;
+ sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
+ if (fwd_tsn == 0) {
+ return (0);
+ } else {
+ /* Clean up the fwd-tsn list */
+ sctp_clean_up_ctl(stcb, asoc);
+ return (0);
+ }
+ }
+ /*
+ * Ok, it is just data retransmission we need to do or that and a
+ * fwd-tsn with it all.
+ */
+ if (TAILQ_EMPTY(&asoc->sent_queue)) {
+ return (SCTP_RETRAN_DONE);
+ }
+ if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
+ (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
+ /* not yet open, resend the cookie and that is it */
+ return (1);
+ }
+#ifdef SCTP_AUDITING_ENABLED
+ sctp_auditing(20, inp, stcb, NULL);
+#endif
+ data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
+ TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
+ if (chk->sent != SCTP_DATAGRAM_RESEND) {
+ /* No, not sent to this net or not ready for rtx */
+ continue;
+ }
+ if (chk->data == NULL) {
+ printf("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
+ chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
+ continue;
+ }
+ if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
+ (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
+ /* Gak, we have exceeded max unlucky retran, abort! */
+ SCTP_PRINTF("Gak, chk->snd_count:%d >= max:%d - send abort\n",
+ chk->snd_count,
+ SCTP_BASE_SYSCTL(sctp_max_retran_chunk));
+ atomic_add_int(&stcb->asoc.refcnt, 1);
+ sctp_abort_an_association(stcb->sctp_ep, stcb, 0, NULL, so_locked);
+ SCTP_TCB_LOCK(stcb);
+ atomic_subtract_int(&stcb->asoc.refcnt, 1);
+ return (SCTP_RETRAN_EXIT);
+ }
+ /* pick up the net */
+ net = chk->whoTo;
+ if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
+ mtu = (net->mtu - SCTP_MIN_OVERHEAD);
+ } else {
+ mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
+ }
+
+ if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
+ /* No room in peers rwnd */
+ uint32_t tsn;
+
+ tsn = asoc->last_acked_seq + 1;
+ if (tsn == chk->rec.data.TSN_seq) {
+ /*
+ * we make a special exception for this
+ * case. The peer has no rwnd but is missing
+ * the lowest chunk.. which is probably what
+ * is holding up the rwnd.
+ */
+ goto one_chunk_around;
+ }
+ return (1);
+ }
+one_chunk_around:
+ if (asoc->peers_rwnd < mtu) {
+ one_chunk = 1;
+ if ((asoc->peers_rwnd == 0) &&
+ (asoc->total_flight == 0)) {
+ chk->window_probe = 1;
+ chk->whoTo->window_probe = 1;
+ }
+ }
+#ifdef SCTP_AUDITING_ENABLED
+ sctp_audit_log(0xC3, 2);
+#endif
+ bundle_at = 0;
+ m = NULL;
+ net->fast_retran_ip = 0;
+ if (chk->rec.data.doing_fast_retransmit == 0) {
+ /*
+ * if no FR in progress skip destination that have
+ * flight_size > cwnd.
+ */
+ if (net->flight_size >= net->cwnd) {
+ continue;
+ }
+ } else {
+ /*
+ * Mark the destination net to have FR recovery
+ * limits put on it.
+ */
+ *fr_done = 1;
+ net->fast_retran_ip = 1;
+ }
+
+ /*
+ * if no AUTH is yet included and this chunk requires it,
+ * make sure to account for it. We don't apply the size
+ * until the AUTH chunk is actually added below in case
+ * there is no room for this chunk.
+ */
+ if (data_auth_reqd && (auth == NULL)) {
+ dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
+ } else
+ dmtu = 0;
+
+ if ((chk->send_size <= (mtu - dmtu)) ||
+ (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
+ /* ok we will add this one */
+ if (data_auth_reqd) {
+ if (auth == NULL) {
+ m = sctp_add_auth_chunk(m,
+ &endofchain,
+ &auth,
+ &auth_offset,
+ stcb,
+ SCTP_DATA);
+ auth_keyid = chk->auth_keyid;
+ override_ok = 0;
+ SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+ } else if (override_ok) {
+ auth_keyid = chk->auth_keyid;
+ override_ok = 0;
+ } else if (chk->auth_keyid != auth_keyid) {
+ /* different keyid, so done bundling */
+ break;
+ }
+ }
+ m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
+ if (m == NULL) {
+ SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+ return (ENOMEM);
+ }
+ /* Do clear IP_DF ? */
+ if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
+ no_fragmentflg = 0;
+ }
+ /* upate our MTU size */
+ if (mtu > (chk->send_size + dmtu))
+ mtu -= (chk->send_size + dmtu);
+ else
+ mtu = 0;
+ data_list[bundle_at++] = chk;
+ if (one_chunk && (asoc->total_flight <= 0)) {
+ SCTP_STAT_INCR(sctps_windowprobed);
+ }
+ }
+ if (one_chunk == 0) {
+ /*
+ * now are there anymore forward from chk to pick
+ * up?
+ */
+ fwd = TAILQ_NEXT(chk, sctp_next);
+ while (fwd) {
+ if (fwd->sent != SCTP_DATAGRAM_RESEND) {
+ /* Nope, not for retran */
+ fwd = TAILQ_NEXT(fwd, sctp_next);
+ continue;
+ }
+ if (fwd->whoTo != net) {
+ /* Nope, not the net in question */
+ fwd = TAILQ_NEXT(fwd, sctp_next);
+ continue;
+ }
+ if (data_auth_reqd && (auth == NULL)) {
+ dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
+ } else
+ dmtu = 0;
+ if (fwd->send_size <= (mtu - dmtu)) {
+ if (data_auth_reqd) {
+ if (auth == NULL) {
+ m = sctp_add_auth_chunk(m,
+ &endofchain,
+ &auth,
+ &auth_offset,
+ stcb,
+ SCTP_DATA);
+ auth_keyid = fwd->auth_keyid;
+ override_ok = 0;
+ SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+ } else if (override_ok) {
+ auth_keyid = fwd->auth_keyid;
+ override_ok = 0;
+ } else if (fwd->auth_keyid != auth_keyid) {
+ /*
+ * different keyid,
+ * so done bundling
+ */
+ break;
+ }
+ }
+ m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
+ if (m == NULL) {
+ SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+ return (ENOMEM);
+ }
+ /* Do clear IP_DF ? */
+ if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
+ no_fragmentflg = 0;
+ }
+ /* upate our MTU size */
+ if (mtu > (fwd->send_size + dmtu))
+ mtu -= (fwd->send_size + dmtu);
+ else
+ mtu = 0;
+ data_list[bundle_at++] = fwd;
+ if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
+ break;
+ }
+ fwd = TAILQ_NEXT(fwd, sctp_next);
+ } else {
+ /* can't fit so we are done */
+ break;
+ }
+ }
+ }
+ /* Is there something to send for this destination? */
+ if (m) {
+ /*
+ * No matter if we fail/or suceed we should start a
+ * timer. A failure is like a lost IP packet :-)
+ */
+ if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
+ /*
+ * no timer running on this destination
+ * restart it.
+ */
+ sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
+ tmr_started = 1;
+ }
+ /* Now lets send it, if there is anything to send :> */
+ if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
+ (struct sockaddr *)&net->ro._l_addr, m,
+ auth_offset, auth, auth_keyid,
+ no_fragmentflg, 0, NULL, 0,
+ inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
+ net->port, so_locked, NULL))) {
+ /* error, we could not output */
+ SCTP_STAT_INCR(sctps_lowlevelerr);
+ return (error);
+ }
+ m = endofchain = NULL;
+ auth = NULL;
+ auth_offset = 0;
+ /* For HB's */
+ /*
+ * We don't want to mark the net->sent time here
+ * since this we use this for HB and retrans cannot
+ * measure RTT
+ */
+ /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
+
+ /* For auto-close */
+ cnt_thru++;
+ if (*now_filled == 0) {
+ (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
+ *now = asoc->time_last_sent;
+ *now_filled = 1;
+ } else {
+ asoc->time_last_sent = *now;
+ }
+ *cnt_out += bundle_at;
+#ifdef SCTP_AUDITING_ENABLED
+ sctp_audit_log(0xC4, bundle_at);
+#endif
+ if (bundle_at) {
+ tsns_sent = data_list[0]->rec.data.TSN_seq;
+ }
+ for (i = 0; i < bundle_at; i++) {
+ SCTP_STAT_INCR(sctps_sendretransdata);
+ data_list[i]->sent = SCTP_DATAGRAM_SENT;
+ /*
+ * When we have a revoked data, and we
+ * retransmit it, then we clear the revoked
+ * flag since this flag dictates if we
+ * subtracted from the fs
+ */
+ if (data_list[i]->rec.data.chunk_was_revoked) {
+ /* Deflate the cwnd */
+ data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
+ data_list[i]->rec.data.chunk_was_revoked = 0;
+ }
+ data_list[i]->snd_count++;
+ sctp_ucount_decr(asoc->sent_queue_retran_cnt);
+ /* record the time */
+ data_list[i]->sent_rcv_time = asoc->time_last_sent;
+ if (data_list[i]->book_size_scale) {
+ /*
+ * need to double the book size on
+ * this one
+ */
+ data_list[i]->book_size_scale = 0;
+ /*
+ * Since we double the booksize, we
+ * must also double the output queue
+ * size, since this get shrunk when
+ * we free by this amount.
+ */
+ atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
+ data_list[i]->book_size *= 2;
+
+
+ } else {
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
+ sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
+ asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
+ }
+ asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
+ (uint32_t) (data_list[i]->send_size +
+ SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
+ }
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
+ sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
+ data_list[i]->whoTo->flight_size,
+ data_list[i]->book_size,
+ (uintptr_t) data_list[i]->whoTo,
+ data_list[i]->rec.data.TSN_seq);
+ }
+ sctp_flight_size_increase(data_list[i]);
+ sctp_total_flight_increase(stcb, data_list[i]);
+ if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
+ /* SWS sender side engages */
+ asoc->peers_rwnd = 0;
+ }
+ if ((i == 0) &&
+ (data_list[i]->rec.data.doing_fast_retransmit)) {
+ SCTP_STAT_INCR(sctps_sendfastretrans);
+ if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
+ (tmr_started == 0)) {
+ /*-
+ * ok we just fast-retrans'd
+ * the lowest TSN, i.e the
+ * first on the list. In
+ * this case we want to give
+ * some more time to get a
+ * SACK back without a
+ * t3-expiring.
+ */
+ sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
+ SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
+ sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
+ }
+ }
+ }
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
+ sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
+ }
+#ifdef SCTP_AUDITING_ENABLED
+ sctp_auditing(21, inp, stcb, NULL);
+#endif
+ } else {
+ /* None will fit */
+ return (1);
+ }
+ if (asoc->sent_queue_retran_cnt <= 0) {
+ /* all done we have no more to retran */
+ asoc->sent_queue_retran_cnt = 0;
+ break;
+ }
+ if (one_chunk) {
+ /* No more room in rwnd */
+ return (1);
+ }
+ /* stop the for loop here. we sent out a packet */
+ break;
+ }
+ return (0);
+}
+
+
+static int
+sctp_timer_validation(struct sctp_inpcb *inp,
+ struct sctp_tcb *stcb,
+ struct sctp_association *asoc,
+ int ret)
+{
+ struct sctp_nets *net;
+
+ /* Validate that a timer is running somewhere */
+ TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
+ if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
+ /* Here is a timer */
+ return (ret);
+ }
+ }
+ SCTP_TCB_LOCK_ASSERT(stcb);
+ /* Gak, we did not have a timer somewhere */
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
+ sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
+ return (ret);
+}
+
+void
+sctp_chunk_output(struct sctp_inpcb *inp,
+ struct sctp_tcb *stcb,
+ int from_where,
+ int so_locked
+#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
+ SCTP_UNUSED
+#endif
+)
+{
+ /*-
+ * Ok this is the generic chunk service queue. we must do the
+ * following:
+ * - See if there are retransmits pending, if so we must
+ * do these first.
+ * - Service the stream queue that is next, moving any
+ * message (note I must get a complete message i.e.
+ * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
+ * TSN's
+ * - Check to see if the cwnd/rwnd allows any output, if so we
+ * go ahead and fomulate and send the low level chunks. Making sure
+ * to combine any control in the control chunk queue also.
+ */
+ struct sctp_association *asoc;
+ struct sctp_nets *net;
+ int error = 0, num_out = 0, tot_out = 0, ret = 0, reason_code = 0,
+ burst_cnt = 0, burst_limit = 0;
+ struct timeval now;
+ int now_filled = 0;
+ int nagle_on = 0;
+ int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
+ int un_sent = 0;
+ int fr_done, tot_frs = 0;
+
+ asoc = &stcb->asoc;
+ if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
+ if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
+ nagle_on = 0;
+ } else {
+ nagle_on = 1;
+ }
+ }
+ SCTP_TCB_LOCK_ASSERT(stcb);
+
+ un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
+
+ if ((un_sent <= 0) &&
+ (TAILQ_EMPTY(&asoc->control_send_queue)) &&
+ (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
+ (asoc->sent_queue_retran_cnt == 0)) {
+ /* Nothing to do unless there is something to be sent left */
+ return;
+ }
+ /*
+ * Do we have something to send, data or control AND a sack timer
+ * running, if so piggy-back the sack.
+ */
+ if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
+ sctp_send_sack(stcb);
+ (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
+ }
+ while (asoc->sent_queue_retran_cnt) {
+ /*-
+ * Ok, it is retransmission time only, we send out only ONE
+ * packet with a single call off to the retran code.
+ */
+ if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
+ /*-
+ * Special hook for handling cookiess discarded
+ * by peer that carried data. Send cookie-ack only
+ * and then the next call with get the retran's.
+ */
+ (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
+ from_where,
+ &now, &now_filled, frag_point, so_locked);
+ return;
+ } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
+ /* if its not from a HB then do it */
+ fr_done = 0;
+ ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
+ if (fr_done) {
+ tot_frs++;
+ }
+ } else {
+ /*
+ * its from any other place, we don't allow retran
+ * output (only control)
+ */
+ ret = 1;
+ }
+ if (ret > 0) {
+ /* Can't send anymore */
+ /*-
+ * now lets push out control by calling med-level
+ * output once. this assures that we WILL send HB's
+ * if queued too.
+ */
+ (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
+ from_where,
+ &now, &now_filled, frag_point, so_locked);
+#ifdef SCTP_AUDITING_ENABLED
+ sctp_auditing(8, inp, stcb, NULL);
+#endif
+ (void)sctp_timer_validation(inp, stcb, asoc, ret);
+ return;
+ }
+ if (ret < 0) {
+ /*-
+ * The count was off.. retran is not happening so do
+ * the normal retransmission.
+ */
+#ifdef SCTP_AUDITING_ENABLED
+ sctp_auditing(9, inp, stcb, NULL);
+#endif
+ if (ret == SCTP_RETRAN_EXIT) {
+ return;
+ }
+ break;
+ }
+ if (from_where == SCTP_OUTPUT_FROM_T3) {
+ /* Only one transmission allowed out of a timeout */
+#ifdef SCTP_AUDITING_ENABLED
+ sctp_auditing(10, inp, stcb, NULL);
+#endif
+ /* Push out any control */
+ (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
+ &now, &now_filled, frag_point, so_locked);
+ return;
+ }
+ if (tot_frs > asoc->max_burst) {
+ /* Hit FR burst limit */
+ return;
+ }
+ if ((num_out == 0) && (ret == 0)) {
+
+ /* No more retrans to send */
+ break;
+ }
+ }
+#ifdef SCTP_AUDITING_ENABLED
+ sctp_auditing(12, inp, stcb, NULL);
+#endif
+ /* Check for bad destinations, if they exist move chunks around. */
+ burst_limit = asoc->max_burst;
+ TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
+ if ((net->dest_state & SCTP_ADDR_NOT_REACHABLE) ==
+ SCTP_ADDR_NOT_REACHABLE) {
+ /*-
+ * if possible move things off of this address we
+ * still may send below due to the dormant state but
+ * we try to find an alternate address to send to
+ * and if we have one we move all queued data on the
+ * out wheel to this alternate address.
+ */
+ if (net->ref_count > 1)
+ sctp_move_chunks_from_net(stcb, net);
+ } else if ((asoc->sctp_cmt_on_off == 1) &&
+ (asoc->sctp_cmt_pf > 0) &&
+ ((net->dest_state & SCTP_ADDR_PF) == SCTP_ADDR_PF)) {
+ /*
+ * JRS 5/14/07 - If CMT PF is on and the current
+ * destination is in PF state, move all queued data
+ * to an alternate desination.
+ */
+ if (net->ref_count > 1)
+ sctp_move_chunks_from_net(stcb, net);
+ } else {
+ /*-
+ * if ((asoc->sat_network) || (net->addr_is_local))
+ * { burst_limit = asoc->max_burst *
+ * SCTP_SAT_NETWORK_BURST_INCR; }
+ */
+ if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
+ if ((net->flight_size + (burst_limit * net->mtu)) < net->cwnd) {
+ /*
+ * JRS - Use the congestion control
+ * given in the congestion control
+ * module
+ */
+ asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, burst_limit);
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
+ sctp_log_maxburst(stcb, net, 0, burst_limit, SCTP_MAX_BURST_APPLIED);
+ }
+ SCTP_STAT_INCR(sctps_maxburstqueued);
+ }
+ net->fast_retran_ip = 0;
+ } else {
+ if (net->flight_size == 0) {
+ /* Should be decaying the cwnd here */
+ ;
+ }
+ }
+ }
+
+ }
+ burst_cnt = 0;
+ do {
+ error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
+ &reason_code, 0, from_where,
+ &now, &now_filled, frag_point, so_locked);
+ if (error) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
+ sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
+ }
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
+ sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
+ sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
+ }
+ break;
+ }
+ SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
+
+ tot_out += num_out;
+ burst_cnt++;
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
+ sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
+ if (num_out == 0) {
+ sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
+ }
+ }
+ if (nagle_on) {
+ /*-
+ * When nagle is on, we look at how much is un_sent, then
+ * if its smaller than an MTU and we have data in
+ * flight we stop.
+ */
+ un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
+ (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
+ if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
+ (stcb->asoc.total_flight > 0)) {
+ break;
+ }
+ }
+ if (TAILQ_EMPTY(&asoc->control_send_queue) &&
+ TAILQ_EMPTY(&asoc->send_queue) &&
+ TAILQ_EMPTY(&asoc->out_wheel)) {
+ /* Nothing left to send */
+ break;
+ }
+ if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
+ /* Nothing left to send */
+ break;
+ }
+ } while (num_out && (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
+ (burst_cnt < burst_limit)));
+
+ if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
+ if (burst_cnt >= burst_limit) {
+ SCTP_STAT_INCR(sctps_maxburstqueued);
+ asoc->burst_limit_applied = 1;
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
+ sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
+ }
+ } else {
+ asoc->burst_limit_applied = 0;
+ }
+ }
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
+ sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
+ }
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
+ tot_out);
+
+ /*-
+ * Now we need to clean up the control chunk chain if a ECNE is on
+ * it. It must be marked as UNSENT again so next call will continue
+ * to send it until such time that we get a CWR, to remove it.
+ */
+ if (stcb->asoc.ecn_echo_cnt_onq)
+ sctp_fix_ecn_echo(asoc);
+ return;
+}
+
+
+int
+sctp_output(inp, m, addr, control, p, flags)
+ struct sctp_inpcb *inp;
+ struct mbuf *m;
+ struct sockaddr *addr;
+ struct mbuf *control;
+ struct thread *p;
+ int flags;
+{
+ if (inp == NULL) {
+ SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ return (EINVAL);
+ }
+ if (inp->sctp_socket == NULL) {
+ SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ return (EINVAL);
+ }
+ return (sctp_sosend(inp->sctp_socket,
+ addr,
+ (struct uio *)NULL,
+ m,
+ control,
+ flags, p
+ ));
+}
+
+void
+send_forward_tsn(struct sctp_tcb *stcb,
+ struct sctp_association *asoc)
+{
+ struct sctp_tmit_chunk *chk;
+ struct sctp_forward_tsn_chunk *fwdtsn;
+ uint32_t advance_peer_ack_point;
+
+ SCTP_TCB_LOCK_ASSERT(stcb);
+ TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
+ if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
+ /* mark it to unsent */
+ chk->sent = SCTP_DATAGRAM_UNSENT;
+ chk->snd_count = 0;
+ /* Do we correct its output location? */
+ if (chk->whoTo != asoc->primary_destination) {
+ sctp_free_remote_addr(chk->whoTo);
+ chk->whoTo = asoc->primary_destination;
+ atomic_add_int(&chk->whoTo->ref_count, 1);
+ }
+ goto sctp_fill_in_rest;
+ }
+ }
+ /* Ok if we reach here we must build one */
+ sctp_alloc_a_chunk(stcb, chk);
+ if (chk == NULL) {
+ return;
+ }
+ asoc->fwd_tsn_cnt++;
+ chk->copy_by_ref = 0;
+ chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
+ chk->rec.chunk_id.can_take_data = 0;
+ chk->asoc = asoc;
+ chk->whoTo = NULL;
+ chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
+ if (chk->data == NULL) {
+ sctp_free_a_chunk(stcb, chk);
+ return;
+ }
+ SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
+ chk->sent = SCTP_DATAGRAM_UNSENT;
+ chk->snd_count = 0;
+ chk->whoTo = asoc->primary_destination;
+ atomic_add_int(&chk->whoTo->ref_count, 1);
+ TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
+ asoc->ctrl_queue_cnt++;
+sctp_fill_in_rest:
+ /*-
+ * Here we go through and fill out the part that deals with
+ * stream/seq of the ones we skip.
+ */
+ SCTP_BUF_LEN(chk->data) = 0;
+ {
+ struct sctp_tmit_chunk *at, *tp1, *last;
+ struct sctp_strseq *strseq;
+ unsigned int cnt_of_space, i, ovh;
+ unsigned int space_needed;
+ unsigned int cnt_of_skipped = 0;
+
+ TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
+ if (at->sent != SCTP_FORWARD_TSN_SKIP) {
+ /* no more to look at */
+ break;
+ }
+ if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
+ /* We don't report these */
+ continue;
+ }
+ cnt_of_skipped++;
+ }
+ space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
+ (cnt_of_skipped * sizeof(struct sctp_strseq)));
+
+ cnt_of_space = M_TRAILINGSPACE(chk->data);
+
+ if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
+ ovh = SCTP_MIN_OVERHEAD;
+ } else {
+ ovh = SCTP_MIN_V4_OVERHEAD;
+ }
+ if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
+ /* trim to a mtu size */
+ cnt_of_space = asoc->smallest_mtu - ovh;
+ }
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
+ sctp_misc_ints(SCTP_FWD_TSN_CHECK,
+ 0xff, 0, cnt_of_skipped,
+ asoc->advanced_peer_ack_point);
+
+ }
+ advance_peer_ack_point = asoc->advanced_peer_ack_point;
+ if (cnt_of_space < space_needed) {
+ /*-
+ * ok we must trim down the chunk by lowering the
+ * advance peer ack point.
+ */
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
+ sctp_misc_ints(SCTP_FWD_TSN_CHECK,
+ 0xff, 0xff, cnt_of_space,
+ space_needed);
+ }
+ cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
+ cnt_of_skipped /= sizeof(struct sctp_strseq);
+ /*-
+ * Go through and find the TSN that will be the one
+ * we report.
+ */
+ at = TAILQ_FIRST(&asoc->sent_queue);
+ for (i = 0; i < cnt_of_skipped; i++) {
+ tp1 = TAILQ_NEXT(at, sctp_next);
+ if (tp1 == NULL) {
+ break;
+ }
+ at = tp1;
+ }
+ if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
+ sctp_misc_ints(SCTP_FWD_TSN_CHECK,
+ 0xff, cnt_of_skipped, at->rec.data.TSN_seq,
+ asoc->advanced_peer_ack_point);
+ }
+ last = at;
+ /*-
+ * last now points to last one I can report, update
+ * peer ack point
+ */
+ if (last)
+ advance_peer_ack_point = last->rec.data.TSN_seq;
+ space_needed = sizeof(struct sctp_forward_tsn_chunk) +
+ cnt_of_skipped * sizeof(struct sctp_strseq);
+ }
+ chk->send_size = space_needed;
+ /* Setup the chunk */
+ fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
+ fwdtsn->ch.chunk_length = htons(chk->send_size);
+ fwdtsn->ch.chunk_flags = 0;
+ fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
+ fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
+ SCTP_BUF_LEN(chk->data) = chk->send_size;
+ fwdtsn++;
+ /*-
+ * Move pointer to after the fwdtsn and transfer to the
+ * strseq pointer.
+ */
+ strseq = (struct sctp_strseq *)fwdtsn;
+ /*-
+ * Now populate the strseq list. This is done blindly
+ * without pulling out duplicate stream info. This is
+ * inefficent but won't harm the process since the peer will
+ * look at these in sequence and will thus release anything.
+ * It could mean we exceed the PMTU and chop off some that
+ * we could have included.. but this is unlikely (aka 1432/4
+ * would mean 300+ stream seq's would have to be reported in
+ * one FWD-TSN. With a bit of work we can later FIX this to
+ * optimize and pull out duplcates.. but it does add more
+ * overhead. So for now... not!
+ */
+ at = TAILQ_FIRST(&asoc->sent_queue);
+ for (i = 0; i < cnt_of_skipped; i++) {
+ tp1 = TAILQ_NEXT(at, sctp_next);
+ if (tp1 == NULL)
+ break;
+ if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
+ /* We don't report these */
+ i--;
+ at = tp1;
+ continue;
+ }
+ if (at->rec.data.TSN_seq == advance_peer_ack_point) {
+ at->rec.data.fwd_tsn_cnt = 0;
+ }
+ strseq->stream = ntohs(at->rec.data.stream_number);
+ strseq->sequence = ntohs(at->rec.data.stream_seq);
+ strseq++;
+ at = tp1;
+ }
+ }
+ return;
+
+}
+
+void
+sctp_send_sack(struct sctp_tcb *stcb)
+{
+ /*-
+ * Queue up a SACK or NR-SACK in the control queue.
+ * We must first check to see if a SACK or NR-SACK is
+ * somehow on the control queue.
+ * If so, we will take and and remove the old one.
+ */
+ struct sctp_association *asoc;
+ struct sctp_tmit_chunk *chk, *a_chk;
+ struct sctp_sack_chunk *sack;
+ struct sctp_nr_sack_chunk *nr_sack;
+ struct sctp_gap_ack_block *gap_descriptor;
+ struct sack_track *selector;
+ int mergeable = 0;
+ int offset;
+ caddr_t limit;
+ uint32_t *dup;
+ int limit_reached = 0;
+ unsigned int i, siz, j;
+ unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
+ int num_dups = 0;
+ int space_req;
+ uint32_t highest_tsn;
+ uint8_t flags;
+ uint8_t type;
+ uint8_t tsn_map;
+
+ if ((stcb->asoc.sctp_nr_sack_on_off == 1) &&
+ (stcb->asoc.peer_supports_nr_sack == 1)) {
+ type = SCTP_NR_SELECTIVE_ACK;
+ } else {
+ type = SCTP_SELECTIVE_ACK;
+ }
+ a_chk = NULL;
+ asoc = &stcb->asoc;
+ SCTP_TCB_LOCK_ASSERT(stcb);
+ if (asoc->last_data_chunk_from == NULL) {
+ /* Hmm we never received anything */
+ return;
+ }
+ sctp_slide_mapping_arrays(stcb);
+ sctp_set_rwnd(stcb, asoc);
+ TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
+ if (chk->rec.chunk_id.id == type) {
+ /* Hmm, found a sack already on queue, remove it */
+ TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
+ asoc->ctrl_queue_cnt--;
+ a_chk = chk;
+ if (a_chk->data) {
+ sctp_m_freem(a_chk->data);
+ a_chk->data = NULL;
+ }
+ sctp_free_remote_addr(a_chk->whoTo);
+ a_chk->whoTo = NULL;
+ break;
+ }
+ }
+ if (a_chk == NULL) {
+ sctp_alloc_a_chunk(stcb, a_chk);
+ if (a_chk == NULL) {
+ /* No memory so we drop the idea, and set a timer */
+ if (stcb->asoc.delayed_ack) {
+ sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
+ stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
+ sctp_timer_start(SCTP_TIMER_TYPE_RECV,
+ stcb->sctp_ep, stcb, NULL);
+ } else {
+ stcb->asoc.send_sack = 1;
+ }
+ return;
+ }
+ a_chk->copy_by_ref = 0;
+ a_chk->rec.chunk_id.id = type;
+ a_chk->rec.chunk_id.can_take_data = 1;
+ }
+ /* Clear our pkt counts */
+ asoc->data_pkts_seen = 0;
+
+ a_chk->asoc = asoc;
+ a_chk->snd_count = 0;
+ a_chk->send_size = 0; /* fill in later */
+ a_chk->sent = SCTP_DATAGRAM_UNSENT;
+ a_chk->whoTo = NULL;
+
+ if ((asoc->numduptsns) ||
+ (asoc->last_data_chunk_from->dest_state & SCTP_ADDR_NOT_REACHABLE)) {
+ /*-
+ * Ok, we have some duplicates or the destination for the
+ * sack is unreachable, lets see if we can select an
+ * alternate than asoc->last_data_chunk_from
+ */
+ if ((!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_NOT_REACHABLE)) &&
+ (asoc->used_alt_onsack > asoc->numnets)) {
+ /* We used an alt last time, don't this time */
+ a_chk->whoTo = NULL;
+ } else {
+ asoc->used_alt_onsack++;
+ a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
+ }
+ if (a_chk->whoTo == NULL) {
+ /* Nope, no alternate */
+ a_chk->whoTo = asoc->last_data_chunk_from;
+ asoc->used_alt_onsack = 0;
+ }
+ } else {
+ /*
+ * No duplicates so we use the last place we received data
+ * from.
+ */
+ asoc->used_alt_onsack = 0;
+ a_chk->whoTo = asoc->last_data_chunk_from;
+ }
+ if (a_chk->whoTo) {
+ atomic_add_int(&a_chk->whoTo->ref_count, 1);
+ }
+ if (compare_with_wrap(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map, MAX_TSN)) {
+ highest_tsn = asoc->highest_tsn_inside_map;
+ } else {
+ highest_tsn = asoc->highest_tsn_inside_nr_map;
+ }
+ if (highest_tsn == asoc->cumulative_tsn) {
+ /* no gaps */
+ if (type == SCTP_SELECTIVE_ACK) {
+ space_req = sizeof(struct sctp_sack_chunk);
+ } else {
+ space_req = sizeof(struct sctp_nr_sack_chunk);
+ }
+ } else {
+ /* gaps get a cluster */
+ space_req = MCLBYTES;
+ }
+ /* Ok now lets formulate a MBUF with our sack */
+ a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_DONTWAIT, 1, MT_DATA);
+ if ((a_chk->data == NULL) ||
+ (a_chk->whoTo == NULL)) {
+ /* rats, no mbuf memory */
+ if (a_chk->data) {
+ /* was a problem with the destination */
+ sctp_m_freem(a_chk->data);
+ a_chk->data = NULL;
+ }
+ sctp_free_a_chunk(stcb, a_chk);
+ /* sa_ignore NO_NULL_CHK */
+ if (stcb->asoc.delayed_ack) {
+ sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
+ stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6);
+ sctp_timer_start(SCTP_TIMER_TYPE_RECV,
+ stcb->sctp_ep, stcb, NULL);
+ } else {
+ stcb->asoc.send_sack = 1;
+ }
+ return;
+ }
+ /* ok, lets go through and fill it in */
+ SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
+ space = M_TRAILINGSPACE(a_chk->data);
+ if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
+ space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
+ }
+ limit = mtod(a_chk->data, caddr_t);
+ limit += space;
+
+ /* 0x01 is used by nonce for ecn */
+ if ((SCTP_BASE_SYSCTL(sctp_ecn_enable)) &&
+ (SCTP_BASE_SYSCTL(sctp_ecn_nonce)) &&
+ (asoc->peer_supports_ecn_nonce))
+ flags = (asoc->receiver_nonce_sum & SCTP_SACK_NONCE_SUM);
+ else
+ flags = 0;
+
+ if ((asoc->sctp_cmt_on_off == 1) &&
+ SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
+ /*-
+ * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
+ * received, then set high bit to 1, else 0. Reset
+ * pkts_rcvd.
+ */
+ flags |= (asoc->cmt_dac_pkts_rcvd << 6);
+ asoc->cmt_dac_pkts_rcvd = 0;
+ }
+#ifdef SCTP_ASOCLOG_OF_TSNS
+ stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
+ stcb->asoc.cumack_log_atsnt++;
+ if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
+ stcb->asoc.cumack_log_atsnt = 0;
+ }
+#endif
+ /* reset the readers interpretation */
+ stcb->freed_by_sorcv_sincelast = 0;
+
+ if (type == SCTP_SELECTIVE_ACK) {
+ sack = mtod(a_chk->data, struct sctp_sack_chunk *);
+ nr_sack = NULL;
+ gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
+ if (highest_tsn > asoc->mapping_array_base_tsn) {
+ siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
+ } else {
+ siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
+ }
+ } else {
+ sack = NULL;
+ nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
+ gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
+ if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
+ siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
+ } else {
+ siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
+ }
+ }
+
+ if (compare_with_wrap(asoc->mapping_array_base_tsn, asoc->cumulative_tsn, MAX_TSN)) {
+ offset = 1;
+ } else {
+ offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
+ }
+ if (((type == SCTP_SELECTIVE_ACK) &&
+ compare_with_wrap(highest_tsn, asoc->cumulative_tsn, MAX_TSN)) ||
+ ((type == SCTP_NR_SELECTIVE_ACK) &&
+ compare_with_wrap(asoc->highest_tsn_inside_map, asoc->cumulative_tsn, MAX_TSN))) {
+ /* we have a gap .. maybe */
+ for (i = 0; i < siz; i++) {
+ tsn_map = asoc->mapping_array[i];
+ if (type == SCTP_SELECTIVE_ACK) {
+ tsn_map |= asoc->nr_mapping_array[i];
+ }
+ if (i == 0) {
+ /*
+ * Clear all bits corresponding to TSNs
+ * smaller or equal to the cumulative TSN.
+ */
+ tsn_map &= (~0 << (1 - offset));
+ }
+ selector = &sack_array[tsn_map];
+ if (mergeable && selector->right_edge) {
+ /*
+ * Backup, left and right edges were ok to
+ * merge.
+ */
+ num_gap_blocks--;
+ gap_descriptor--;
+ }
+ if (selector->num_entries == 0)
+ mergeable = 0;
+ else {
+ for (j = 0; j < selector->num_entries; j++) {
+ if (mergeable && selector->right_edge) {
+ /*
+ * do a merge by NOT setting
+ * the left side
+ */
+ mergeable = 0;
+ } else {
+ /*
+ * no merge, set the left
+ * side
+ */
+ mergeable = 0;
+ gap_descriptor->start = htons((selector->gaps[j].start + offset));
+ }
+ gap_descriptor->end = htons((selector->gaps[j].end + offset));
+ num_gap_blocks++;
+ gap_descriptor++;
+ if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
+ /* no more room */
+ limit_reached = 1;
+ break;
+ }
+ }
+ if (selector->left_edge) {
+ mergeable = 1;
+ }
+ }
+ if (limit_reached) {
+ /* Reached the limit stop */
+ break;
+ }
+ offset += 8;
+ }
+ }
+ if ((type == SCTP_NR_SELECTIVE_ACK) &&
+ (limit_reached == 0)) {
+
+ mergeable = 0;
+
+ if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
+ siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
+ } else {
+ siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
+ }
+
+ if (compare_with_wrap(asoc->mapping_array_base_tsn, asoc->cumulative_tsn, MAX_TSN)) {
+ offset = 1;
+ } else {
+ offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
+ }
+ if (compare_with_wrap(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn, MAX_TSN)) {
+ /* we have a gap .. maybe */
+ for (i = 0; i < siz; i++) {
+ tsn_map = asoc->nr_mapping_array[i];
+ if (i == 0) {
+ /*
+ * Clear all bits corresponding to
+ * TSNs smaller or equal to the
+ * cumulative TSN.
+ */
+ tsn_map &= (~0 << (1 - offset));
+ }
+ selector = &sack_array[tsn_map];
+ if (mergeable && selector->right_edge) {
+ /*
+ * Backup, left and right edges were
+ * ok to merge.
+ */
+ num_nr_gap_blocks--;
+ gap_descriptor--;
+ }
+ if (selector->num_entries == 0)
+ mergeable = 0;
+ else {
+ for (j = 0; j < selector->num_entries; j++) {
+ if (mergeable && selector->right_edge) {
+ /*
+ * do a merge by NOT
+ * setting the left
+ * side
+ */
+ mergeable = 0;
+ } else {
+ /*
+ * no merge, set the
+ * left side
+ */
+ mergeable = 0;
+ gap_descriptor->start = htons((selector->gaps[j].start + offset));
+ }
+ gap_descriptor->end = htons((selector->gaps[j].end + offset));
+ num_nr_gap_blocks++;
+ gap_descriptor++;
+ if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
+ /* no more room */
+ limit_reached = 1;
+ break;
+ }
+ }
+ if (selector->left_edge) {
+ mergeable = 1;
+ }
+ }
+ if (limit_reached) {
+ /* Reached the limit stop */
+ break;
+ }
+ offset += 8;
+ }
+ }
+ }
+ /* now we must add any dups we are going to report. */
+ if ((limit_reached == 0) && (asoc->numduptsns)) {
+ dup = (uint32_t *) gap_descriptor;
+ for (i = 0; i < asoc->numduptsns; i++) {
+ *dup = htonl(asoc->dup_tsns[i]);
+ dup++;
+ num_dups++;
+ if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
+ /* no more room */
+ break;
+ }
+ }
+ asoc->numduptsns = 0;
+ }
+ /*
+ * now that the chunk is prepared queue it to the control chunk
+ * queue.
+ */
+ if (type == SCTP_SELECTIVE_ACK) {
+ a_chk->send_size = sizeof(struct sctp_sack_chunk) +
+ (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
+ num_dups * sizeof(int32_t);
+ SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
+ sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
+ sack->sack.a_rwnd = htonl(asoc->my_rwnd);
+ sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
+ sack->sack.num_dup_tsns = htons(num_dups);
+ sack->ch.chunk_type = type;
+ sack->ch.chunk_flags = flags;
+ sack->ch.chunk_length = htons(a_chk->send_size);
+ } else {
+ a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) +
+ (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
+ num_dups * sizeof(int32_t);
+ SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
+ nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
+ nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
+ nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
+ nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
+ nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
+ nr_sack->nr_sack.reserved = 0;
+ nr_sack->ch.chunk_type = type;
+ nr_sack->ch.chunk_flags = flags;
+ nr_sack->ch.chunk_length = htons(a_chk->send_size);
+ }
+ TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
+ asoc->my_last_reported_rwnd = asoc->my_rwnd;
+ asoc->ctrl_queue_cnt++;
+ asoc->send_sack = 0;
+ SCTP_STAT_INCR(sctps_sendsacks);
+ return;
+}
+
+void
+sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
+#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
+ SCTP_UNUSED
+#endif
+)
+{
+ struct mbuf *m_abort;
+ struct mbuf *m_out = NULL, *m_end = NULL;
+ struct sctp_abort_chunk *abort = NULL;
+ int sz;
+ uint32_t auth_offset = 0;
+ struct sctp_auth_chunk *auth = NULL;
+
+ /*-
+ * Add an AUTH chunk, if chunk requires it and save the offset into
+ * the chain for AUTH
+ */
+ if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
+ stcb->asoc.peer_auth_chunks)) {
+ m_out = sctp_add_auth_chunk(m_out, &m_end, &auth, &auth_offset,
+ stcb, SCTP_ABORT_ASSOCIATION);
+ SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+ }
+ SCTP_TCB_LOCK_ASSERT(stcb);
+ m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
+ if (m_abort == NULL) {
+ /* no mbuf's */
+ if (m_out)
+ sctp_m_freem(m_out);
+ return;
+ }
+ /* link in any error */
+ SCTP_BUF_NEXT(m_abort) = operr;
+ sz = 0;
+ if (operr) {
+ struct mbuf *n;
+
+ n = operr;
+ while (n) {
+ sz += SCTP_BUF_LEN(n);
+ n = SCTP_BUF_NEXT(n);
+ }
+ }
+ SCTP_BUF_LEN(m_abort) = sizeof(*abort);
+ if (m_out == NULL) {
+ /* NO Auth chunk prepended, so reserve space in front */
+ SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
+ m_out = m_abort;
+ } else {
+ /* Put AUTH chunk at the front of the chain */
+ SCTP_BUF_NEXT(m_end) = m_abort;
+ }
+
+ /* fill in the ABORT chunk */
+ abort = mtod(m_abort, struct sctp_abort_chunk *);
+ abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
+ abort->ch.chunk_flags = 0;
+ abort->ch.chunk_length = htons(sizeof(*abort) + sz);
+
+ (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb,
+ stcb->asoc.primary_destination,
+ (struct sockaddr *)&stcb->asoc.primary_destination->ro._l_addr,
+ m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, NULL, 0,
+ stcb->sctp_ep->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
+ stcb->asoc.primary_destination->port, so_locked, NULL);
+ SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+}
+
+void
+sctp_send_shutdown_complete(struct sctp_tcb *stcb,
+ struct sctp_nets *net,
+ int reflect_vtag)
+{
+ /* formulate and SEND a SHUTDOWN-COMPLETE */
+ struct mbuf *m_shutdown_comp;
+ struct sctp_shutdown_complete_chunk *shutdown_complete;
+ uint32_t vtag;
+ uint8_t flags;
+
+ m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER);
+ if (m_shutdown_comp == NULL) {
+ /* no mbuf's */
+ return;
+ }
+ if (reflect_vtag) {
+ flags = SCTP_HAD_NO_TCB;
+ vtag = stcb->asoc.my_vtag;
+ } else {
+ flags = 0;
+ vtag = stcb->asoc.peer_vtag;
+ }
+ shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
+ shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
+ shutdown_complete->ch.chunk_flags = flags;
+ shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
+ SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
+ (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
+ (struct sockaddr *)&net->ro._l_addr,
+ m_shutdown_comp, 0, NULL, 0, 1, 0, NULL, 0,
+ stcb->sctp_ep->sctp_lport, stcb->rport,
+ htonl(vtag),
+ net->port, SCTP_SO_NOT_LOCKED, NULL);
+ SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+ return;
+}
+
+void
+sctp_send_shutdown_complete2(struct mbuf *m, int iphlen, struct sctphdr *sh,
+ uint32_t vrf_id, uint16_t port)
+{
+ /* formulate and SEND a SHUTDOWN-COMPLETE */
+ struct mbuf *o_pak;
+ struct mbuf *mout;
+ struct ip *iph, *iph_out;
+ struct udphdr *udp = NULL;
+
+#ifdef INET6
+ struct ip6_hdr *ip6, *ip6_out;
+
+#endif
+ int offset_out, len, mlen;
+ struct sctp_shutdown_complete_msg *comp_cp;
+
+ iph = mtod(m, struct ip *);
+ switch (iph->ip_v) {
+ case IPVERSION:
+ len = (sizeof(struct ip) + sizeof(struct sctp_shutdown_complete_msg));
+ break;
+#ifdef INET6
+ case IPV6_VERSION >> 4:
+ len = (sizeof(struct ip6_hdr) + sizeof(struct sctp_shutdown_complete_msg));
+ break;
+#endif
+ default:
+ return;
+ }
+ if (port) {
+ len += sizeof(struct udphdr);
+ }
+ mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
+ if (mout == NULL) {
+ return;
+ }
+ SCTP_BUF_RESV_UF(mout, max_linkhdr);
+ SCTP_BUF_LEN(mout) = len;
+ SCTP_BUF_NEXT(mout) = NULL;
+ iph_out = NULL;
+#ifdef INET6
+ ip6_out = NULL;
+#endif
+ offset_out = 0;
+
+ switch (iph->ip_v) {
+ case IPVERSION:
+ iph_out = mtod(mout, struct ip *);
+
+ /* Fill in the IP header for the ABORT */
+ iph_out->ip_v = IPVERSION;
+ iph_out->ip_hl = (sizeof(struct ip) / 4);
+ iph_out->ip_tos = (u_char)0;
+ iph_out->ip_id = 0;
+ iph_out->ip_off = 0;
+ iph_out->ip_ttl = MAXTTL;
+ if (port) {
+ iph_out->ip_p = IPPROTO_UDP;
+ } else {
+ iph_out->ip_p = IPPROTO_SCTP;
+ }
+ iph_out->ip_src.s_addr = iph->ip_dst.s_addr;
+ iph_out->ip_dst.s_addr = iph->ip_src.s_addr;
+
+ /* let IP layer calculate this */
+ iph_out->ip_sum = 0;
+ offset_out += sizeof(*iph_out);
+ comp_cp = (struct sctp_shutdown_complete_msg *)(
+ (caddr_t)iph_out + offset_out);
+ break;
+#ifdef INET6
+ case IPV6_VERSION >> 4:
+ ip6 = (struct ip6_hdr *)iph;
+ ip6_out = mtod(mout, struct ip6_hdr *);
+
+ /* Fill in the IPv6 header for the ABORT */
+ ip6_out->ip6_flow = ip6->ip6_flow;
+ ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
+ if (port) {
+ ip6_out->ip6_nxt = IPPROTO_UDP;
+ } else {
+ ip6_out->ip6_nxt = IPPROTO_SCTP;
+ }
+ ip6_out->ip6_src = ip6->ip6_dst;
+ ip6_out->ip6_dst = ip6->ip6_src;
+ /*
+ * ?? The old code had both the iph len + payload, I think
+ * this is wrong and would never have worked
+ */
+ ip6_out->ip6_plen = sizeof(struct sctp_shutdown_complete_msg);
+ offset_out += sizeof(*ip6_out);
+ comp_cp = (struct sctp_shutdown_complete_msg *)(
+ (caddr_t)ip6_out + offset_out);
+ break;
+#endif /* INET6 */
+ default:
+ /* Currently not supported. */
+ sctp_m_freem(mout);
+ return;
+ }
+ if (port) {
+ udp = (struct udphdr *)comp_cp;
+ udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
+ udp->uh_dport = port;
+ udp->uh_ulen = htons(sizeof(struct sctp_shutdown_complete_msg) + sizeof(struct udphdr));
+ if (iph_out)
+ udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
+ offset_out += sizeof(struct udphdr);
+ comp_cp = (struct sctp_shutdown_complete_msg *)((caddr_t)comp_cp + sizeof(struct udphdr));
+ }
+ if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
+ /* no mbuf's */
+ sctp_m_freem(mout);
+ return;
+ }
+ /* Now copy in and fill in the ABORT tags etc. */
+ comp_cp->sh.src_port = sh->dest_port;
+ comp_cp->sh.dest_port = sh->src_port;
+ comp_cp->sh.checksum = 0;
+ comp_cp->sh.v_tag = sh->v_tag;
+ comp_cp->shut_cmp.ch.chunk_flags = SCTP_HAD_NO_TCB;
+ comp_cp->shut_cmp.ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
+ comp_cp->shut_cmp.ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
+
+ if (iph_out != NULL) {
+ sctp_route_t ro;
+ int ret;
+
+ mlen = SCTP_BUF_LEN(mout);
+ bzero(&ro, sizeof ro);
+ /* set IPv4 length */
+ iph_out->ip_len = mlen;
+#ifdef SCTP_PACKET_LOGGING
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
+ sctp_packet_log(mout, mlen);
+#endif
+ if (port) {
+#if defined(SCTP_WITH_NO_CSUM)
+ SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+ comp_cp->sh.checksum = sctp_calculate_cksum(mout, offset_out);
+ SCTP_STAT_INCR(sctps_sendswcrc);
+#endif
+ SCTP_ENABLE_UDP_CSUM(mout);
+ } else {
+#if defined(SCTP_WITH_NO_CSUM)
+ SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+ mout->m_pkthdr.csum_flags = CSUM_SCTP;
+ mout->m_pkthdr.csum_data = 0;
+ SCTP_STAT_INCR(sctps_sendhwcrc);
+#endif
+ }
+ SCTP_ATTACH_CHAIN(o_pak, mout, mlen);
+ /* out it goes */
+ SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id);
+
+ /* Free the route if we got one back */
+ if (ro.ro_rt)
+ RTFREE(ro.ro_rt);
+ }
+#ifdef INET6
+ if (ip6_out != NULL) {
+ struct route_in6 ro;
+ int ret;
+ struct ifnet *ifp = NULL;
+
+ bzero(&ro, sizeof(ro));
+ mlen = SCTP_BUF_LEN(mout);
+#ifdef SCTP_PACKET_LOGGING
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
+ sctp_packet_log(mout, mlen);
+#endif
+ SCTP_ATTACH_CHAIN(o_pak, mout, mlen);
+ if (port) {
+#if defined(SCTP_WITH_NO_CSUM)
+ SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+ comp_cp->sh.checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
+ SCTP_STAT_INCR(sctps_sendswcrc);
+#endif
+ if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), mlen - sizeof(struct ip6_hdr))) == 0) {
+ udp->uh_sum = 0xffff;
+ }
+ } else {
+#if defined(SCTP_WITH_NO_CSUM)
+ SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+ mout->m_pkthdr.csum_flags = CSUM_SCTP;
+ mout->m_pkthdr.csum_data = 0;
+ SCTP_STAT_INCR(sctps_sendhwcrc);
+#endif
+ }
+ SCTP_IP6_OUTPUT(ret, o_pak, &ro, &ifp, NULL, vrf_id);
+
+ /* Free the route if we got one back */
+ if (ro.ro_rt)
+ RTFREE(ro.ro_rt);
+ }
+#endif
+ SCTP_STAT_INCR(sctps_sendpackets);
+ SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
+ SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+ return;
+
+}
+
+static struct sctp_nets *
+sctp_select_hb_destination(struct sctp_tcb *stcb, struct timeval *now)
+{
+ struct sctp_nets *net, *hnet;
+ int ms_goneby, highest_ms, state_overide = 0;
+
+ (void)SCTP_GETTIME_TIMEVAL(now);
+ highest_ms = 0;
+ hnet = NULL;
+ SCTP_TCB_LOCK_ASSERT(stcb);
+ TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
+ if (
+ ((net->dest_state & SCTP_ADDR_NOHB) && ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) ||
+ (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)
+ ) {
+ /*
+ * Skip this guy from consideration if HB is off AND
+ * its confirmed
+ */
+ continue;
+ }
+ if (sctp_destination_is_reachable(stcb, (struct sockaddr *)&net->ro._l_addr) == 0) {
+ /* skip this dest net from consideration */
+ continue;
+ }
+ if (net->last_sent_time.tv_sec) {
+ /* Sent to so we subtract */
+ ms_goneby = (now->tv_sec - net->last_sent_time.tv_sec) * 1000;
+ } else
+ /* Never been sent to */
+ ms_goneby = 0x7fffffff;
+ /*-
+ * When the address state is unconfirmed but still
+ * considered reachable, we HB at a higher rate. Once it
+ * goes confirmed OR reaches the "unreachable" state, thenw
+ * we cut it back to HB at a more normal pace.
+ */
+ if ((net->dest_state & (SCTP_ADDR_UNCONFIRMED | SCTP_ADDR_NOT_REACHABLE)) == SCTP_ADDR_UNCONFIRMED) {
+ state_overide = 1;
+ } else {
+ state_overide = 0;
+ }
+
+ if ((((unsigned int)ms_goneby >= net->RTO) || (state_overide)) &&
+ (ms_goneby > highest_ms)) {
+ highest_ms = ms_goneby;
+ hnet = net;
+ }
+ }
+ if (hnet &&
+ ((hnet->dest_state & (SCTP_ADDR_UNCONFIRMED | SCTP_ADDR_NOT_REACHABLE)) == SCTP_ADDR_UNCONFIRMED)) {
+ state_overide = 1;
+ } else {
+ state_overide = 0;
+ }
+
+ if (hnet && highest_ms && (((unsigned int)highest_ms >= hnet->RTO) || state_overide)) {
+ /*-
+ * Found the one with longest delay bounds OR it is
+ * unconfirmed and still not marked unreachable.
+ */
+ SCTPDBG(SCTP_DEBUG_OUTPUT4, "net:%p is the hb winner -", hnet);
+#ifdef SCTP_DEBUG
+ if (hnet) {
+ SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT4,
+ (struct sockaddr *)&hnet->ro._l_addr);
+ } else {
+ SCTPDBG(SCTP_DEBUG_OUTPUT4, " none\n");
+ }
+#endif
+ /* update the timer now */
+ hnet->last_sent_time = *now;
+ return (hnet);
+ }
+ /* Nothing to HB */
+ return (NULL);
+}
+
+int
+sctp_send_hb(struct sctp_tcb *stcb, int user_req, struct sctp_nets *u_net)
+{
+ struct sctp_tmit_chunk *chk;
+ struct sctp_nets *net;
+ struct sctp_heartbeat_chunk *hb;
+ struct timeval now;
+ struct sockaddr_in *sin;
+ struct sockaddr_in6 *sin6;
+
+ SCTP_TCB_LOCK_ASSERT(stcb);
+ if (user_req == 0) {
+ net = sctp_select_hb_destination(stcb, &now);
+ if (net == NULL) {
+ /*-
+ * All our busy none to send to, just start the
+ * timer again.
+ */
+ if (stcb->asoc.state == 0) {
+ return (0);
+ }
+ sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT,
+ stcb->sctp_ep,
+ stcb,
+ net);
+ return (0);
+ }
+ } else {
+ net = u_net;
+ if (net == NULL) {
+ return (0);
+ }
+ (void)SCTP_GETTIME_TIMEVAL(&now);
+ }
+ sin = (struct sockaddr_in *)&net->ro._l_addr;
+ if (sin->sin_family != AF_INET) {
+ if (sin->sin_family != AF_INET6) {
+ /* huh */
+ return (0);
+ }
+ }
+ sctp_alloc_a_chunk(stcb, chk);
+ if (chk == NULL) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
+ return (0);
+ }
+ chk->copy_by_ref = 0;
+ chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
+ chk->rec.chunk_id.can_take_data = 1;
+ chk->asoc = &stcb->asoc;
+ chk->send_size = sizeof(struct sctp_heartbeat_chunk);
+
+ chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
+ if (chk->data == NULL) {
+ sctp_free_a_chunk(stcb, chk);
+ return (0);
+ }
+ SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
+ SCTP_BUF_LEN(chk->data) = chk->send_size;
+ chk->sent = SCTP_DATAGRAM_UNSENT;
+ chk->snd_count = 0;
+ chk->whoTo = net;
+ atomic_add_int(&chk->whoTo->ref_count, 1);
+ /* Now we have a mbuf that we can fill in with the details */
+ hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
+ memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
+ /* fill out chunk header */
+ hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
+ hb->ch.chunk_flags = 0;
+ hb->ch.chunk_length = htons(chk->send_size);
+ /* Fill out hb parameter */
+ hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
+ hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
+ hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
+ hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
+ /* Did our user request this one, put it in */
+ hb->heartbeat.hb_info.user_req = user_req;
+ hb->heartbeat.hb_info.addr_family = sin->sin_family;
+ hb->heartbeat.hb_info.addr_len = sin->sin_len;
+ if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
+ /*
+ * we only take from the entropy pool if the address is not
+ * confirmed.
+ */
+ net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
+ net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
+ } else {
+ net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
+ net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
+ }
+ if (sin->sin_family == AF_INET) {
+ memcpy(hb->heartbeat.hb_info.address, &sin->sin_addr, sizeof(sin->sin_addr));
+ } else if (sin->sin_family == AF_INET6) {
+ /* We leave the scope the way it is in our lookup table. */
+ sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
+ memcpy(hb->heartbeat.hb_info.address, &sin6->sin6_addr, sizeof(sin6->sin6_addr));
+ } else {
+ /* huh compiler bug */
+ return (0);
+ }
+
+ /*
+ * JRS 5/14/07 - In CMT PF, the T3 timer is used to track
+ * PF-heartbeats. Because of this, threshold management is done by
+ * the t3 timer handler, and does not need to be done upon the send
+ * of a PF-heartbeat. If CMT PF is on and the destination to which a
+ * heartbeat is being sent is in PF state, do NOT do threshold
+ * management.
+ */
+ if ((stcb->asoc.sctp_cmt_pf == 0) ||
+ ((net->dest_state & SCTP_ADDR_PF) != SCTP_ADDR_PF)) {
+ /* ok we have a destination that needs a beat */
+ /* lets do the theshold management Qiaobing style */
+ if (sctp_threshold_management(stcb->sctp_ep, stcb, net,
+ stcb->asoc.max_send_times)) {
+ /*-
+ * we have lost the association, in a way this is
+ * quite bad since we really are one less time since
+ * we really did not send yet. This is the down side
+ * to the Q's style as defined in the RFC and not my
+ * alternate style defined in the RFC.
+ */
+ if (chk->data != NULL) {
+ sctp_m_freem(chk->data);
+ chk->data = NULL;
+ }
+ /*
+ * Here we do NOT use the macro since the
+ * association is now gone.
+ */
+ if (chk->whoTo) {
+ sctp_free_remote_addr(chk->whoTo);
+ chk->whoTo = NULL;
+ }
+ sctp_free_a_chunk((struct sctp_tcb *)NULL, chk);
+ return (-1);
+ }
+ }
+ net->hb_responded = 0;
+ TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
+ stcb->asoc.ctrl_queue_cnt++;
+ SCTP_STAT_INCR(sctps_sendheartbeat);
+ /*-
+ * Call directly med level routine to put out the chunk. It will
+ * always tumble out control chunks aka HB but it may even tumble
+ * out data too.
+ */
+ return (1);
+}
+
+void
+sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
+ uint32_t high_tsn)
+{
+ struct sctp_association *asoc;
+ struct sctp_ecne_chunk *ecne;
+ struct sctp_tmit_chunk *chk;
+
+ asoc = &stcb->asoc;
+ SCTP_TCB_LOCK_ASSERT(stcb);
+ TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
+ if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
+ /* found a previous ECN_ECHO update it if needed */
+ ecne = mtod(chk->data, struct sctp_ecne_chunk *);
+ ecne->tsn = htonl(high_tsn);
+ return;
+ }
+ }
+ /* nope could not find one to update so we must build one */
+ sctp_alloc_a_chunk(stcb, chk);
+ if (chk == NULL) {
+ return;
+ }
+ chk->copy_by_ref = 0;
+ SCTP_STAT_INCR(sctps_sendecne);
+ chk->rec.chunk_id.id = SCTP_ECN_ECHO;
+ chk->rec.chunk_id.can_take_data = 0;
+ chk->asoc = &stcb->asoc;
+ chk->send_size = sizeof(struct sctp_ecne_chunk);
+ chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
+ if (chk->data == NULL) {
+ sctp_free_a_chunk(stcb, chk);
+ return;
+ }
+ SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
+ SCTP_BUF_LEN(chk->data) = chk->send_size;
+ chk->sent = SCTP_DATAGRAM_UNSENT;
+ chk->snd_count = 0;
+ chk->whoTo = net;
+ atomic_add_int(&chk->whoTo->ref_count, 1);
+ stcb->asoc.ecn_echo_cnt_onq++;
+ ecne = mtod(chk->data, struct sctp_ecne_chunk *);
+ ecne->ch.chunk_type = SCTP_ECN_ECHO;
+ ecne->ch.chunk_flags = 0;
+ ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
+ ecne->tsn = htonl(high_tsn);
+ TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
+ asoc->ctrl_queue_cnt++;
+}
+
+void
+sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
+ struct mbuf *m, int iphlen, int bad_crc)
+{
+ struct sctp_association *asoc;
+ struct sctp_pktdrop_chunk *drp;
+ struct sctp_tmit_chunk *chk;
+ uint8_t *datap;
+ int len;
+ int was_trunc = 0;
+ struct ip *iph;
+
+#ifdef INET6
+ struct ip6_hdr *ip6h;
+
+#endif
+ int fullsz = 0, extra = 0;
+ long spc;
+ int offset;
+ struct sctp_chunkhdr *ch, chunk_buf;
+ unsigned int chk_length;
+
+ if (!stcb) {
+ return;
+ }
+ asoc = &stcb->asoc;
+ SCTP_TCB_LOCK_ASSERT(stcb);
+ if (asoc->peer_supports_pktdrop == 0) {
+ /*-
+ * peer must declare support before I send one.
+ */
+ return;
+ }
+ if (stcb->sctp_socket == NULL) {
+ return;
+ }
+ sctp_alloc_a_chunk(stcb, chk);
+ if (chk == NULL) {
+ return;
+ }
+ chk->copy_by_ref = 0;
+ iph = mtod(m, struct ip *);
+ if (iph == NULL) {
+ sctp_free_a_chunk(stcb, chk);
+ return;
+ }
+ switch (iph->ip_v) {
+ case IPVERSION:
+ /* IPv4 */
+ len = chk->send_size = iph->ip_len;
+ break;
+#ifdef INET6
+ case IPV6_VERSION >> 4:
+ /* IPv6 */
+ ip6h = mtod(m, struct ip6_hdr *);
+ len = chk->send_size = htons(ip6h->ip6_plen);
+ break;
+#endif
+ default:
+ return;
+ }
+ /* Validate that we do not have an ABORT in here. */
+ offset = iphlen + sizeof(struct sctphdr);
+ ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
+ sizeof(*ch), (uint8_t *) & chunk_buf);
+ while (ch != NULL) {
+ chk_length = ntohs(ch->chunk_length);
+ if (chk_length < sizeof(*ch)) {
+ /* break to abort land */
+ break;
+ }
+ switch (ch->chunk_type) {
+ case SCTP_PACKET_DROPPED:
+ case SCTP_ABORT_ASSOCIATION:
+ case SCTP_INITIATION_ACK:
+ /**
+ * We don't respond with an PKT-DROP to an ABORT
+ * or PKT-DROP. We also do not respond to an
+ * INIT-ACK, because we can't know if the initiation
+ * tag is correct or not.
+ */
+ sctp_free_a_chunk(stcb, chk);
+ return;
+ default:
+ break;
+ }
+ offset += SCTP_SIZE32(chk_length);
+ ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
+ sizeof(*ch), (uint8_t *) & chunk_buf);
+ }
+
+ if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
+ min(stcb->asoc.smallest_mtu, MCLBYTES)) {
+ /*
+ * only send 1 mtu worth, trim off the excess on the end.
+ */
+ fullsz = len - extra;
+ len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
+ was_trunc = 1;
+ }
+ chk->asoc = &stcb->asoc;
+ chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
+ if (chk->data == NULL) {
+jump_out:
+ sctp_free_a_chunk(stcb, chk);
+ return;
+ }
+ SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
+ drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
+ if (drp == NULL) {
+ sctp_m_freem(chk->data);
+ chk->data = NULL;
+ goto jump_out;
+ }
+ chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
+ sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
+ chk->book_size_scale = 0;
+ if (was_trunc) {
+ drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
+ drp->trunc_len = htons(fullsz);
+ /*
+ * Len is already adjusted to size minus overhead above take
+ * out the pkt_drop chunk itself from it.
+ */
+ chk->send_size = len - sizeof(struct sctp_pktdrop_chunk);
+ len = chk->send_size;
+ } else {
+ /* no truncation needed */
+ drp->ch.chunk_flags = 0;
+ drp->trunc_len = htons(0);
+ }
+ if (bad_crc) {
+ drp->ch.chunk_flags |= SCTP_BADCRC;
+ }
+ chk->send_size += sizeof(struct sctp_pktdrop_chunk);
+ SCTP_BUF_LEN(chk->data) = chk->send_size;
+ chk->sent = SCTP_DATAGRAM_UNSENT;
+ chk->snd_count = 0;
+ if (net) {
+ /* we should hit here */
+ chk->whoTo = net;
+ } else {
+ chk->whoTo = asoc->primary_destination;
+ }
+ atomic_add_int(&chk->whoTo->ref_count, 1);
+ chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
+ chk->rec.chunk_id.can_take_data = 1;
+ drp->ch.chunk_type = SCTP_PACKET_DROPPED;
+ drp->ch.chunk_length = htons(chk->send_size);
+ spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
+ if (spc < 0) {
+ spc = 0;
+ }
+ drp->bottle_bw = htonl(spc);
+ if (asoc->my_rwnd) {
+ drp->current_onq = htonl(asoc->size_on_reasm_queue +
+ asoc->size_on_all_streams +
+ asoc->my_rwnd_control_len +
+ stcb->sctp_socket->so_rcv.sb_cc);
+ } else {
+ /*-
+ * If my rwnd is 0, possibly from mbuf depletion as well as
+ * space used, tell the peer there is NO space aka onq == bw
+ */
+ drp->current_onq = htonl(spc);
+ }
+ drp->reserved = 0;
+ datap = drp->data;
+ m_copydata(m, iphlen, len, (caddr_t)datap);
+ TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
+ asoc->ctrl_queue_cnt++;
+}
+
+void
+sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn)
+{
+ struct sctp_association *asoc;
+ struct sctp_cwr_chunk *cwr;
+ struct sctp_tmit_chunk *chk;
+
+ asoc = &stcb->asoc;
+ SCTP_TCB_LOCK_ASSERT(stcb);
+ TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
+ if (chk->rec.chunk_id.id == SCTP_ECN_CWR) {
+ /* found a previous ECN_CWR update it if needed */
+ cwr = mtod(chk->data, struct sctp_cwr_chunk *);
+ if (compare_with_wrap(high_tsn, ntohl(cwr->tsn),
+ MAX_TSN)) {
+ cwr->tsn = htonl(high_tsn);
+ }
+ return;
+ }
+ }
+ /* nope could not find one to update so we must build one */
+ sctp_alloc_a_chunk(stcb, chk);
+ if (chk == NULL) {
+ return;
+ }
+ chk->copy_by_ref = 0;
+ chk->rec.chunk_id.id = SCTP_ECN_CWR;
+ chk->rec.chunk_id.can_take_data = 1;
+ chk->asoc = &stcb->asoc;
+ chk->send_size = sizeof(struct sctp_cwr_chunk);
+ chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
+ if (chk->data == NULL) {
+ sctp_free_a_chunk(stcb, chk);
+ return;
+ }
+ SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
+ SCTP_BUF_LEN(chk->data) = chk->send_size;
+ chk->sent = SCTP_DATAGRAM_UNSENT;
+ chk->snd_count = 0;
+ chk->whoTo = net;
+ atomic_add_int(&chk->whoTo->ref_count, 1);
+ cwr = mtod(chk->data, struct sctp_cwr_chunk *);
+ cwr->ch.chunk_type = SCTP_ECN_CWR;
+ cwr->ch.chunk_flags = 0;
+ cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
+ cwr->tsn = htonl(high_tsn);
+ TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
+ asoc->ctrl_queue_cnt++;
+}
+
+void
+sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk,
+ int number_entries, uint16_t * list,
+ uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
+{
+ int len, old_len, i;
+ struct sctp_stream_reset_out_request *req_out;
+ struct sctp_chunkhdr *ch;
+
+ ch = mtod(chk->data, struct sctp_chunkhdr *);
+
+
+ old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
+
+ /* get to new offset for the param. */
+ req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
+ /* now how long will this param be? */
+ len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
+ req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
+ req_out->ph.param_length = htons(len);
+ req_out->request_seq = htonl(seq);
+ req_out->response_seq = htonl(resp_seq);
+ req_out->send_reset_at_tsn = htonl(last_sent);
+ if (number_entries) {
+ for (i = 0; i < number_entries; i++) {
+ req_out->list_of_streams[i] = htons(list[i]);
+ }
+ }
+ if (SCTP_SIZE32(len) > len) {
+ /*-
+ * Need to worry about the pad we may end up adding to the
+ * end. This is easy since the struct is either aligned to 4
+ * bytes or 2 bytes off.
+ */
+ req_out->list_of_streams[number_entries] = 0;
+ }
+ /* now fix the chunk length */
+ ch->chunk_length = htons(len + old_len);
+ chk->book_size = len + old_len;
+ chk->book_size_scale = 0;
+ chk->send_size = SCTP_SIZE32(chk->book_size);
+ SCTP_BUF_LEN(chk->data) = chk->send_size;
+ return;
+}
+
+
+void
+sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
+ int number_entries, uint16_t * list,
+ uint32_t seq)
+{
+ int len, old_len, i;
+ struct sctp_stream_reset_in_request *req_in;
+ struct sctp_chunkhdr *ch;
+
+ ch = mtod(chk->data, struct sctp_chunkhdr *);
+
+
+ old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
+
+ /* get to new offset for the param. */
+ req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
+ /* now how long will this param be? */
+ len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
+ req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
+ req_in->ph.param_length = htons(len);
+ req_in->request_seq = htonl(seq);
+ if (number_entries) {
+ for (i = 0; i < number_entries; i++) {
+ req_in->list_of_streams[i] = htons(list[i]);
+ }
+ }
+ if (SCTP_SIZE32(len) > len) {
+ /*-
+ * Need to worry about the pad we may end up adding to the
+ * end. This is easy since the struct is either aligned to 4
+ * bytes or 2 bytes off.
+ */
+ req_in->list_of_streams[number_entries] = 0;
+ }
+ /* now fix the chunk length */
+ ch->chunk_length = htons(len + old_len);
+ chk->book_size = len + old_len;
+ chk->book_size_scale = 0;
+ chk->send_size = SCTP_SIZE32(chk->book_size);
+ SCTP_BUF_LEN(chk->data) = chk->send_size;
+ return;
+}
+
+
+void
+sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
+ uint32_t seq)
+{
+ int len, old_len;
+ struct sctp_stream_reset_tsn_request *req_tsn;
+ struct sctp_chunkhdr *ch;
+
+ ch = mtod(chk->data, struct sctp_chunkhdr *);
+
+
+ old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
+
+ /* get to new offset for the param. */
+ req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
+ /* now how long will this param be? */
+ len = sizeof(struct sctp_stream_reset_tsn_request);
+ req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
+ req_tsn->ph.param_length = htons(len);
+ req_tsn->request_seq = htonl(seq);
+
+ /* now fix the chunk length */
+ ch->chunk_length = htons(len + old_len);
+ chk->send_size = len + old_len;
+ chk->book_size = SCTP_SIZE32(chk->send_size);
+ chk->book_size_scale = 0;
+ SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
+ return;
+}
+
+void
+sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
+ uint32_t resp_seq, uint32_t result)
+{
+ int len, old_len;
+ struct sctp_stream_reset_response *resp;
+ struct sctp_chunkhdr *ch;
+
+ ch = mtod(chk->data, struct sctp_chunkhdr *);
+
+
+ old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
+
+ /* get to new offset for the param. */
+ resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
+ /* now how long will this param be? */
+ len = sizeof(struct sctp_stream_reset_response);
+ resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
+ resp->ph.param_length = htons(len);
+ resp->response_seq = htonl(resp_seq);
+ resp->result = ntohl(result);
+
+ /* now fix the chunk length */
+ ch->chunk_length = htons(len + old_len);
+ chk->book_size = len + old_len;
+ chk->book_size_scale = 0;
+ chk->send_size = SCTP_SIZE32(chk->book_size);
+ SCTP_BUF_LEN(chk->data) = chk->send_size;
+ return;
+
+}
+
+
+void
+sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
+ uint32_t resp_seq, uint32_t result,
+ uint32_t send_una, uint32_t recv_next)
+{
+ int len, old_len;
+ struct sctp_stream_reset_response_tsn *resp;
+ struct sctp_chunkhdr *ch;
+
+ ch = mtod(chk->data, struct sctp_chunkhdr *);
+
+
+ old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
+
+ /* get to new offset for the param. */
+ resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
+ /* now how long will this param be? */
+ len = sizeof(struct sctp_stream_reset_response_tsn);
+ resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
+ resp->ph.param_length = htons(len);
+ resp->response_seq = htonl(resp_seq);
+ resp->result = htonl(result);
+ resp->senders_next_tsn = htonl(send_una);
+ resp->receivers_next_tsn = htonl(recv_next);
+
+ /* now fix the chunk length */
+ ch->chunk_length = htons(len + old_len);
+ chk->book_size = len + old_len;
+ chk->send_size = SCTP_SIZE32(chk->book_size);
+ chk->book_size_scale = 0;
+ SCTP_BUF_LEN(chk->data) = chk->send_size;
+ return;
+}
+
+static void
+sctp_add_a_stream(struct sctp_tmit_chunk *chk,
+ uint32_t seq,
+ uint16_t adding)
+{
+ int len, old_len;
+ struct sctp_chunkhdr *ch;
+ struct sctp_stream_reset_add_strm *addstr;
+
+ ch = mtod(chk->data, struct sctp_chunkhdr *);
+ old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
+
+ /* get to new offset for the param. */
+ addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
+ /* now how long will this param be? */
+ len = sizeof(struct sctp_stream_reset_add_strm);
+
+ /* Fill it out. */
+ addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_STREAMS);
+ addstr->ph.param_length = htons(len);
+ addstr->request_seq = htonl(seq);
+ addstr->number_of_streams = htons(adding);
+ addstr->reserved = 0;
+
+ /* now fix the chunk length */
+ ch->chunk_length = htons(len + old_len);
+ chk->send_size = len + old_len;
+ chk->book_size = SCTP_SIZE32(chk->send_size);
+ chk->book_size_scale = 0;
+ SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
+ return;
+}
+
+int
+sctp_send_str_reset_req(struct sctp_tcb *stcb,
+ int number_entries, uint16_t * list,
+ uint8_t send_out_req,
+ uint32_t resp_seq,
+ uint8_t send_in_req,
+ uint8_t send_tsn_req,
+ uint8_t add_stream,
+ uint16_t adding
+)
+{
+
+ struct sctp_association *asoc;
+ struct sctp_tmit_chunk *chk;
+ struct sctp_chunkhdr *ch;
+ uint32_t seq;
+
+ asoc = &stcb->asoc;
+ if (asoc->stream_reset_outstanding) {
+ /*-
+ * Already one pending, must get ACK back to clear the flag.
+ */
+ SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
+ return (EBUSY);
+ }
+ if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) &&
+ (add_stream == 0)) {
+ /* nothing to do */
+ SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ return (EINVAL);
+ }
+ if (send_tsn_req && (send_out_req || send_in_req)) {
+ /* error, can't do that */
+ SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ return (EINVAL);
+ }
+ sctp_alloc_a_chunk(stcb, chk);
+ if (chk == NULL) {
+ SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+ return (ENOMEM);
+ }
+ chk->copy_by_ref = 0;
+ chk->rec.chunk_id.id = SCTP_STREAM_RESET;
+ chk->rec.chunk_id.can_take_data = 0;
+ chk->asoc = &stcb->asoc;
+ chk->book_size = sizeof(struct sctp_chunkhdr);
+ chk->send_size = SCTP_SIZE32(chk->book_size);
+ chk->book_size_scale = 0;
+
+ chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
+ if (chk->data == NULL) {
+ sctp_free_a_chunk(stcb, chk);
+ SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+ return (ENOMEM);
+ }
+ SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
+
+ /* setup chunk parameters */
+ chk->sent = SCTP_DATAGRAM_UNSENT;
+ chk->snd_count = 0;
+ chk->whoTo = asoc->primary_destination;
+ atomic_add_int(&chk->whoTo->ref_count, 1);
+
+ ch = mtod(chk->data, struct sctp_chunkhdr *);
+ ch->chunk_type = SCTP_STREAM_RESET;
+ ch->chunk_flags = 0;
+ ch->chunk_length = htons(chk->book_size);
+ SCTP_BUF_LEN(chk->data) = chk->send_size;
+
+ seq = stcb->asoc.str_reset_seq_out;
+ if (send_out_req) {
+ sctp_add_stream_reset_out(chk, number_entries, list,
+ seq, resp_seq, (stcb->asoc.sending_seq - 1));
+ asoc->stream_reset_out_is_outstanding = 1;
+ seq++;
+ asoc->stream_reset_outstanding++;
+ }
+ if (add_stream) {
+ sctp_add_a_stream(chk, seq, adding);
+ seq++;
+ asoc->stream_reset_outstanding++;
+ }
+ if (send_in_req) {
+ sctp_add_stream_reset_in(chk, number_entries, list, seq);
+ asoc->stream_reset_outstanding++;
+ }
+ if (send_tsn_req) {
+ sctp_add_stream_reset_tsn(chk, seq);
+ asoc->stream_reset_outstanding++;
+ }
+ asoc->str_reset = chk;
+
+ /* insert the chunk for sending */
+ TAILQ_INSERT_TAIL(&asoc->control_send_queue,
+ chk,
+ sctp_next);
+ asoc->ctrl_queue_cnt++;
+ sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
+ return (0);
+}
+
+void
+sctp_send_abort(struct mbuf *m, int iphlen, struct sctphdr *sh, uint32_t vtag,
+ struct mbuf *err_cause, uint32_t vrf_id, uint16_t port)
+{
+ /*-
+ * Formulate the abort message, and send it back down.
+ */
+ struct mbuf *o_pak;
+ struct mbuf *mout;
+ struct sctp_abort_msg *abm;
+ struct ip *iph, *iph_out;
+ struct udphdr *udp;
+
+#ifdef INET6
+ struct ip6_hdr *ip6, *ip6_out;
+
+#endif
+ int iphlen_out, len;
+
+ /* don't respond to ABORT with ABORT */
+ if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
+ if (err_cause)
+ sctp_m_freem(err_cause);
+ return;
+ }
+ iph = mtod(m, struct ip *);
+ switch (iph->ip_v) {
+ case IPVERSION:
+ len = (sizeof(struct ip) + sizeof(struct sctp_abort_msg));
+ break;
+#ifdef INET6
+ case IPV6_VERSION >> 4:
+ len = (sizeof(struct ip6_hdr) + sizeof(struct sctp_abort_msg));
+ break;
+#endif
+ default:
+ if (err_cause) {
+ sctp_m_freem(err_cause);
+ }
+ return;
+ }
+ if (port) {
+ len += sizeof(struct udphdr);
+ }
+ mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
+ if (mout == NULL) {
+ if (err_cause) {
+ sctp_m_freem(err_cause);
+ }
+ return;
+ }
+ SCTP_BUF_RESV_UF(mout, max_linkhdr);
+ SCTP_BUF_LEN(mout) = len;
+ SCTP_BUF_NEXT(mout) = err_cause;
+ iph_out = NULL;
+#ifdef INET6
+ ip6_out = NULL;
+#endif
+ switch (iph->ip_v) {
+ case IPVERSION:
+ iph_out = mtod(mout, struct ip *);
+
+ /* Fill in the IP header for the ABORT */
+ iph_out->ip_v = IPVERSION;
+ iph_out->ip_hl = (sizeof(struct ip) / 4);
+ iph_out->ip_tos = (u_char)0;
+ iph_out->ip_id = 0;
+ iph_out->ip_off = 0;
+ iph_out->ip_ttl = MAXTTL;
+ if (port) {
+ iph_out->ip_p = IPPROTO_UDP;
+ } else {
+ iph_out->ip_p = IPPROTO_SCTP;
+ }
+ iph_out->ip_src.s_addr = iph->ip_dst.s_addr;
+ iph_out->ip_dst.s_addr = iph->ip_src.s_addr;
+ /* let IP layer calculate this */
+ iph_out->ip_sum = 0;
+
+ iphlen_out = sizeof(*iph_out);
+ abm = (struct sctp_abort_msg *)((caddr_t)iph_out + iphlen_out);
+ break;
+#ifdef INET6
+ case IPV6_VERSION >> 4:
+ ip6 = (struct ip6_hdr *)iph;
+ ip6_out = mtod(mout, struct ip6_hdr *);
+
+ /* Fill in the IP6 header for the ABORT */
+ ip6_out->ip6_flow = ip6->ip6_flow;
+ ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
+ if (port) {
+ ip6_out->ip6_nxt = IPPROTO_UDP;
+ } else {
+ ip6_out->ip6_nxt = IPPROTO_SCTP;
+ }
+ ip6_out->ip6_src = ip6->ip6_dst;
+ ip6_out->ip6_dst = ip6->ip6_src;
+
+ iphlen_out = sizeof(*ip6_out);
+ abm = (struct sctp_abort_msg *)((caddr_t)ip6_out + iphlen_out);
+ break;
+#endif /* INET6 */
+ default:
+ /* Currently not supported */
+ sctp_m_freem(mout);
+ return;
+ }
+
+ udp = (struct udphdr *)abm;
+ if (port) {
+ udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
+ udp->uh_dport = port;
+ /* set udp->uh_ulen later */
+ udp->uh_sum = 0;
+ iphlen_out += sizeof(struct udphdr);
+ abm = (struct sctp_abort_msg *)((caddr_t)abm + sizeof(struct udphdr));
+ }
+ abm->sh.src_port = sh->dest_port;
+ abm->sh.dest_port = sh->src_port;
+ abm->sh.checksum = 0;
+ if (vtag == 0) {
+ abm->sh.v_tag = sh->v_tag;
+ abm->msg.ch.chunk_flags = SCTP_HAD_NO_TCB;
+ } else {
+ abm->sh.v_tag = htonl(vtag);
+ abm->msg.ch.chunk_flags = 0;
+ }
+ abm->msg.ch.chunk_type = SCTP_ABORT_ASSOCIATION;
+
+ if (err_cause) {
+ struct mbuf *m_tmp = err_cause;
+ int err_len = 0;
+
+ /* get length of the err_cause chain */
+ while (m_tmp != NULL) {
+ err_len += SCTP_BUF_LEN(m_tmp);
+ m_tmp = SCTP_BUF_NEXT(m_tmp);
+ }
+ len = SCTP_BUF_LEN(mout) + err_len;
+ if (err_len % 4) {
+ /* need pad at end of chunk */
+ uint32_t cpthis = 0;
+ int padlen;
+
+ padlen = 4 - (len % 4);
+ m_copyback(mout, len, padlen, (caddr_t)&cpthis);
+ len += padlen;
+ }
+ abm->msg.ch.chunk_length = htons(sizeof(abm->msg.ch) + err_len);
+ } else {
+ len = SCTP_BUF_LEN(mout);
+ abm->msg.ch.chunk_length = htons(sizeof(abm->msg.ch));
+ }
+
+ if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
+ /* no mbuf's */
+ sctp_m_freem(mout);
+ return;
+ }
+ if (iph_out != NULL) {
+ sctp_route_t ro;
+ int ret;
+
+ /* zap the stack pointer to the route */
+ bzero(&ro, sizeof ro);
+ if (port) {
+ udp->uh_ulen = htons(len - sizeof(struct ip));
+ udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
+ }
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "sctp_send_abort calling ip_output:\n");
+ SCTPDBG_PKT(SCTP_DEBUG_OUTPUT2, iph_out, &abm->sh);
+ /* set IPv4 length */
+ iph_out->ip_len = len;
+ /* out it goes */
+#ifdef SCTP_PACKET_LOGGING
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
+ sctp_packet_log(mout, len);
+#endif
+ SCTP_ATTACH_CHAIN(o_pak, mout, len);
+ if (port) {
+#if defined(SCTP_WITH_NO_CSUM)
+ SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+ abm->sh.checksum = sctp_calculate_cksum(mout, iphlen_out);
+ SCTP_STAT_INCR(sctps_sendswcrc);
+#endif
+ SCTP_ENABLE_UDP_CSUM(o_pak);
+ } else {
+#if defined(SCTP_WITH_NO_CSUM)
+ SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+ mout->m_pkthdr.csum_flags = CSUM_SCTP;
+ mout->m_pkthdr.csum_data = 0;
+ SCTP_STAT_INCR(sctps_sendhwcrc);
+#endif
+ }
+ SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id);
+
+ /* Free the route if we got one back */
+ if (ro.ro_rt)
+ RTFREE(ro.ro_rt);
+ }
+#ifdef INET6
+ if (ip6_out != NULL) {
+ struct route_in6 ro;
+ int ret;
+ struct ifnet *ifp = NULL;
+
+ /* zap the stack pointer to the route */
+ bzero(&ro, sizeof(ro));
+ if (port) {
+ udp->uh_ulen = htons(len - sizeof(struct ip6_hdr));
+ }
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "sctp_send_abort calling ip6_output:\n");
+ SCTPDBG_PKT(SCTP_DEBUG_OUTPUT2, (struct ip *)ip6_out, &abm->sh);
+ ip6_out->ip6_plen = len - sizeof(*ip6_out);
+#ifdef SCTP_PACKET_LOGGING
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
+ sctp_packet_log(mout, len);
+#endif
+ SCTP_ATTACH_CHAIN(o_pak, mout, len);
+ if (port) {
+#if defined(SCTP_WITH_NO_CSUM)
+ SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+ abm->sh.checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
+ SCTP_STAT_INCR(sctps_sendswcrc);
+#endif
+ if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
+ udp->uh_sum = 0xffff;
+ }
+ } else {
+#if defined(SCTP_WITH_NO_CSUM)
+ SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+ mout->m_pkthdr.csum_flags = CSUM_SCTP;
+ mout->m_pkthdr.csum_data = 0;
+ SCTP_STAT_INCR(sctps_sendhwcrc);
+#endif
+ }
+ SCTP_IP6_OUTPUT(ret, o_pak, &ro, &ifp, NULL, vrf_id);
+
+ /* Free the route if we got one back */
+ if (ro.ro_rt)
+ RTFREE(ro.ro_rt);
+ }
+#endif
+ SCTP_STAT_INCR(sctps_sendpackets);
+ SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
+ SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+}
+
+void
+sctp_send_operr_to(struct mbuf *m, int iphlen, struct mbuf *scm, uint32_t vtag,
+ uint32_t vrf_id, uint16_t port)
+{
+ struct mbuf *o_pak;
+ struct sctphdr *sh, *sh_out;
+ struct sctp_chunkhdr *ch;
+ struct ip *iph, *iph_out;
+ struct udphdr *udp = NULL;
+ struct mbuf *mout;
+
+#ifdef INET6
+ struct ip6_hdr *ip6, *ip6_out;
+
+#endif
+ int iphlen_out, len;
+
+ iph = mtod(m, struct ip *);
+ sh = (struct sctphdr *)((caddr_t)iph + iphlen);
+ switch (iph->ip_v) {
+ case IPVERSION:
+ len = (sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr));
+ break;
+#ifdef INET6
+ case IPV6_VERSION >> 4:
+ len = (sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr));
+ break;
+#endif
+ default:
+ if (scm) {
+ sctp_m_freem(scm);
+ }
+ return;
+ }
+ if (port) {
+ len += sizeof(struct udphdr);
+ }
+ mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
+ if (mout == NULL) {
+ if (scm) {
+ sctp_m_freem(scm);
+ }
+ return;
+ }
+ SCTP_BUF_RESV_UF(mout, max_linkhdr);
+ SCTP_BUF_LEN(mout) = len;
+ SCTP_BUF_NEXT(mout) = scm;
+ iph_out = NULL;
+#ifdef INET6
+ ip6_out = NULL;
+#endif
+ switch (iph->ip_v) {
+ case IPVERSION:
+ iph_out = mtod(mout, struct ip *);
+
+ /* Fill in the IP header for the ABORT */
+ iph_out->ip_v = IPVERSION;
+ iph_out->ip_hl = (sizeof(struct ip) / 4);
+ iph_out->ip_tos = (u_char)0;
+ iph_out->ip_id = 0;
+ iph_out->ip_off = 0;
+ iph_out->ip_ttl = MAXTTL;
+ if (port) {
+ iph_out->ip_p = IPPROTO_UDP;
+ } else {
+ iph_out->ip_p = IPPROTO_SCTP;
+ }
+ iph_out->ip_src.s_addr = iph->ip_dst.s_addr;
+ iph_out->ip_dst.s_addr = iph->ip_src.s_addr;
+ /* let IP layer calculate this */
+ iph_out->ip_sum = 0;
+
+ iphlen_out = sizeof(struct ip);
+ sh_out = (struct sctphdr *)((caddr_t)iph_out + iphlen_out);
+ break;
+#ifdef INET6
+ case IPV6_VERSION >> 4:
+ ip6 = (struct ip6_hdr *)iph;
+ ip6_out = mtod(mout, struct ip6_hdr *);
+
+ /* Fill in the IP6 header for the ABORT */
+ ip6_out->ip6_flow = ip6->ip6_flow;
+ ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
+ if (port) {
+ ip6_out->ip6_nxt = IPPROTO_UDP;
+ } else {
+ ip6_out->ip6_nxt = IPPROTO_SCTP;
+ }
+ ip6_out->ip6_src = ip6->ip6_dst;
+ ip6_out->ip6_dst = ip6->ip6_src;
+
+ iphlen_out = sizeof(struct ip6_hdr);
+ sh_out = (struct sctphdr *)((caddr_t)ip6_out + iphlen_out);
+ break;
+#endif /* INET6 */
+ default:
+ /* Currently not supported */
+ sctp_m_freem(mout);
+ return;
+ }
+
+ udp = (struct udphdr *)sh_out;
+ if (port) {
+ udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
+ udp->uh_dport = port;
+ /* set udp->uh_ulen later */
+ udp->uh_sum = 0;
+ iphlen_out += sizeof(struct udphdr);
+ sh_out = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
+ }
+ sh_out->src_port = sh->dest_port;
+ sh_out->dest_port = sh->src_port;
+ sh_out->v_tag = vtag;
+ sh_out->checksum = 0;
+
+ ch = (struct sctp_chunkhdr *)((caddr_t)sh_out + sizeof(struct sctphdr));
+ ch->chunk_type = SCTP_OPERATION_ERROR;
+ ch->chunk_flags = 0;
+
+ if (scm) {
+ struct mbuf *m_tmp = scm;
+ int cause_len = 0;
+
+ /* get length of the err_cause chain */
+ while (m_tmp != NULL) {
+ cause_len += SCTP_BUF_LEN(m_tmp);
+ m_tmp = SCTP_BUF_NEXT(m_tmp);
+ }
+ len = SCTP_BUF_LEN(mout) + cause_len;
+ if (cause_len % 4) {
+ /* need pad at end of chunk */
+ uint32_t cpthis = 0;
+ int padlen;
+
+ padlen = 4 - (len % 4);
+ m_copyback(mout, len, padlen, (caddr_t)&cpthis);
+ len += padlen;
+ }
+ ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len);
+ } else {
+ len = SCTP_BUF_LEN(mout);
+ ch->chunk_length = htons(sizeof(struct sctp_chunkhdr));
+ }
+
+ if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
+ /* no mbuf's */
+ sctp_m_freem(mout);
+ return;
+ }
+ if (iph_out != NULL) {
+ sctp_route_t ro;
+ int ret;
+
+ /* zap the stack pointer to the route */
+ bzero(&ro, sizeof ro);
+ if (port) {
+ udp->uh_ulen = htons(len - sizeof(struct ip));
+ udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
+ }
+ /* set IPv4 length */
+ iph_out->ip_len = len;
+ /* out it goes */
+#ifdef SCTP_PACKET_LOGGING
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
+ sctp_packet_log(mout, len);
+#endif
+ SCTP_ATTACH_CHAIN(o_pak, mout, len);
+ if (port) {
+#if defined(SCTP_WITH_NO_CSUM)
+ SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+ sh_out->checksum = sctp_calculate_cksum(mout, iphlen_out);
+ SCTP_STAT_INCR(sctps_sendswcrc);
+#endif
+ SCTP_ENABLE_UDP_CSUM(o_pak);
+ } else {
+#if defined(SCTP_WITH_NO_CSUM)
+ SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+ mout->m_pkthdr.csum_flags = CSUM_SCTP;
+ mout->m_pkthdr.csum_data = 0;
+ SCTP_STAT_INCR(sctps_sendhwcrc);
+#endif
+ }
+ SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id);
+
+ /* Free the route if we got one back */
+ if (ro.ro_rt)
+ RTFREE(ro.ro_rt);
+ }
+#ifdef INET6
+ if (ip6_out != NULL) {
+ struct route_in6 ro;
+ int ret;
+ struct ifnet *ifp = NULL;
+
+ /* zap the stack pointer to the route */
+ bzero(&ro, sizeof(ro));
+ if (port) {
+ udp->uh_ulen = htons(len - sizeof(struct ip6_hdr));
+ }
+ ip6_out->ip6_plen = len - sizeof(*ip6_out);
+#ifdef SCTP_PACKET_LOGGING
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
+ sctp_packet_log(mout, len);
+#endif
+ SCTP_ATTACH_CHAIN(o_pak, mout, len);
+ if (port) {
+#if defined(SCTP_WITH_NO_CSUM)
+ SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+ sh_out->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
+ SCTP_STAT_INCR(sctps_sendswcrc);
+#endif
+ if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
+ udp->uh_sum = 0xffff;
+ }
+ } else {
+#if defined(SCTP_WITH_NO_CSUM)
+ SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+ mout->m_pkthdr.csum_flags = CSUM_SCTP;
+ mout->m_pkthdr.csum_data = 0;
+ SCTP_STAT_INCR(sctps_sendhwcrc);
+#endif
+ }
+ SCTP_IP6_OUTPUT(ret, o_pak, &ro, &ifp, NULL, vrf_id);
+
+ /* Free the route if we got one back */
+ if (ro.ro_rt)
+ RTFREE(ro.ro_rt);
+ }
+#endif
+ SCTP_STAT_INCR(sctps_sendpackets);
+ SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
+ SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+}
+
+static struct mbuf *
+sctp_copy_resume(struct sctp_stream_queue_pending *sp,
+ struct uio *uio,
+ struct sctp_sndrcvinfo *srcv,
+ int max_send_len,
+ int user_marks_eor,
+ int *error,
+ uint32_t * sndout,
+ struct mbuf **new_tail)
+{
+ struct mbuf *m;
+
+ m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
+ (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
+ if (m == NULL) {
+ SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+ *error = ENOMEM;
+ } else {
+ *sndout = m_length(m, NULL);
+ *new_tail = m_last(m);
+ }
+ return (m);
+}
+
+static int
+sctp_copy_one(struct sctp_stream_queue_pending *sp,
+ struct uio *uio,
+ int resv_upfront)
+{
+ int left;
+
+ left = sp->length;
+ sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
+ resv_upfront, 0);
+ if (sp->data == NULL) {
+ SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+ return (ENOMEM);
+ }
+ sp->tail_mbuf = m_last(sp->data);
+ return (0);
+}
+
+
+
+static struct sctp_stream_queue_pending *
+sctp_copy_it_in(struct sctp_tcb *stcb,
+ struct sctp_association *asoc,
+ struct sctp_sndrcvinfo *srcv,
+ struct uio *uio,
+ struct sctp_nets *net,
+ int max_send_len,
+ int user_marks_eor,
+ int *error,
+ int non_blocking)
+{
+ /*-
+ * This routine must be very careful in its work. Protocol
+ * processing is up and running so care must be taken to spl...()
+ * when you need to do something that may effect the stcb/asoc. The
+ * sb is locked however. When data is copied the protocol processing
+ * should be enabled since this is a slower operation...
+ */
+ struct sctp_stream_queue_pending *sp = NULL;
+ int resv_in_first;
+
+ *error = 0;
+ /* Now can we send this? */
+ if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
+ (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
+ (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
+ (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
+ /* got data while shutting down */
+ SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
+ *error = ECONNRESET;
+ goto out_now;
+ }
+ sctp_alloc_a_strmoq(stcb, sp);
+ if (sp == NULL) {
+ SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+ *error = ENOMEM;
+ goto out_now;
+ }
+ sp->act_flags = 0;
+ sp->sender_all_done = 0;
+ sp->sinfo_flags = srcv->sinfo_flags;
+ sp->timetolive = srcv->sinfo_timetolive;
+ sp->ppid = srcv->sinfo_ppid;
+ sp->context = srcv->sinfo_context;
+ sp->strseq = 0;
+ (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
+
+ sp->stream = srcv->sinfo_stream;
+ sp->length = min(uio->uio_resid, max_send_len);
+ if ((sp->length == (uint32_t) uio->uio_resid) &&
+ ((user_marks_eor == 0) ||
+ (srcv->sinfo_flags & SCTP_EOF) ||
+ (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
+ sp->msg_is_complete = 1;
+ } else {
+ sp->msg_is_complete = 0;
+ }
+ sp->sender_all_done = 0;
+ sp->some_taken = 0;
+ sp->put_last_out = 0;
+ resv_in_first = sizeof(struct sctp_data_chunk);
+ sp->data = sp->tail_mbuf = NULL;
+ if (sp->length == 0) {
+ *error = 0;
+ goto skip_copy;
+ }
+ sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
+ if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
+ sctp_auth_key_acquire(stcb, stcb->asoc.authinfo.active_keyid);
+ sp->holds_key_ref = 1;
+ }
+ *error = sctp_copy_one(sp, uio, resv_in_first);
+skip_copy:
+ if (*error) {
+ sctp_free_a_strmoq(stcb, sp);
+ sp = NULL;
+ } else {
+ if (sp->sinfo_flags & SCTP_ADDR_OVER) {
+ sp->net = net;
+ atomic_add_int(&sp->net->ref_count, 1);
+ } else {
+ sp->net = NULL;
+ }
+ sctp_set_prsctp_policy(sp);
+ }
+out_now:
+ return (sp);
+}
+
+
+int
+sctp_sosend(struct socket *so,
+ struct sockaddr *addr,
+ struct uio *uio,
+ struct mbuf *top,
+ struct mbuf *control,
+ int flags,
+ struct thread *p
+)
+{
+ int error, use_rcvinfo = 0;
+ struct sctp_sndrcvinfo srcv;
+ struct sockaddr *addr_to_use;
+
+#if defined(INET) && defined(INET6)
+ struct sockaddr_in sin;
+
+#endif
+
+ if (control) {
+ /* process cmsg snd/rcv info (maybe a assoc-id) */
+ if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&srcv, control,
+ sizeof(srcv))) {
+ /* got one */
+ use_rcvinfo = 1;
+ }
+ }
+ addr_to_use = addr;
+#if defined(INET) && defined(INET6)
+ if ((addr) && (addr->sa_family == AF_INET6)) {
+ struct sockaddr_in6 *sin6;
+
+ sin6 = (struct sockaddr_in6 *)addr;
+ if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
+ in6_sin6_2_sin(&sin, sin6);
+ addr_to_use = (struct sockaddr *)&sin;
+ }
+ }
+#endif
+ error = sctp_lower_sosend(so, addr_to_use, uio, top,
+ control,
+ flags,
+ use_rcvinfo ? &srcv : NULL
+ ,p
+ );
+ return (error);
+}
+
+
+int
+sctp_lower_sosend(struct socket *so,
+ struct sockaddr *addr,
+ struct uio *uio,
+ struct mbuf *i_pak,
+ struct mbuf *control,
+ int flags,
+ struct sctp_sndrcvinfo *srcv
+ ,
+ struct thread *p
+)
+{
+ unsigned int sndlen = 0, max_len;
+ int error, len;
+ struct mbuf *top = NULL;
+ int queue_only = 0, queue_only_for_init = 0;
+ int free_cnt_applied = 0;
+ int un_sent;
+ int now_filled = 0;
+ unsigned int inqueue_bytes = 0;
+ struct sctp_block_entry be;
+ struct sctp_inpcb *inp;
+ struct sctp_tcb *stcb = NULL;
+ struct timeval now;
+ struct sctp_nets *net;
+ struct sctp_association *asoc;
+ struct sctp_inpcb *t_inp;
+ int user_marks_eor;
+ int create_lock_applied = 0;
+ int nagle_applies = 0;
+ int some_on_control = 0;
+ int got_all_of_the_send = 0;
+ int hold_tcblock = 0;
+ int non_blocking = 0;
+ uint32_t local_add_more, local_soresv = 0;
+ uint16_t port;
+ uint16_t sinfo_flags;
+ sctp_assoc_t sinfo_assoc_id;
+
+ error = 0;
+ net = NULL;
+ stcb = NULL;
+ asoc = NULL;
+
+ t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
+ if (inp == NULL) {
+ SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ error = EINVAL;
+ if (i_pak) {
+ SCTP_RELEASE_PKT(i_pak);
+ }
+ return (error);
+ }
+ if ((uio == NULL) && (i_pak == NULL)) {
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ return (EINVAL);
+ }
+ user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
+ atomic_add_int(&inp->total_sends, 1);
+ if (uio) {
+ if (uio->uio_resid < 0) {
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ return (EINVAL);
+ }
+ sndlen = uio->uio_resid;
+ } else {
+ top = SCTP_HEADER_TO_CHAIN(i_pak);
+ sndlen = SCTP_HEADER_LEN(i_pak);
+ }
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
+ addr,
+ sndlen);
+ if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
+ (inp->sctp_socket->so_qlimit)) {
+ /* The listener can NOT send */
+ SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
+ error = ENOTCONN;
+ goto out_unlocked;
+ }
+ /**
+ * Pre-screen address, if one is given the sin-len
+ * must be set correctly!
+ */
+ if (addr) {
+ union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
+
+ switch (raddr->sa.sa_family) {
+#if defined(INET)
+ case AF_INET:
+ if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ error = EINVAL;
+ goto out_unlocked;
+ }
+ port = raddr->sin.sin_port;
+ break;
+#endif
+#if defined(INET6)
+ case AF_INET6:
+ if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ error = EINVAL;
+ goto out_unlocked;
+ }
+ port = raddr->sin6.sin6_port;
+ break;
+#endif
+ default:
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
+ error = EAFNOSUPPORT;
+ goto out_unlocked;
+ }
+ } else
+ port = 0;
+
+ if (srcv) {
+ sinfo_flags = srcv->sinfo_flags;
+ sinfo_assoc_id = srcv->sinfo_assoc_id;
+ if (INVALID_SINFO_FLAG(sinfo_flags) ||
+ PR_SCTP_INVALID_POLICY(sinfo_flags)) {
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ error = EINVAL;
+ goto out_unlocked;
+ }
+ if (srcv->sinfo_flags)
+ SCTP_STAT_INCR(sctps_sends_with_flags);
+ } else {
+ sinfo_flags = inp->def_send.sinfo_flags;
+ sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
+ }
+ if (sinfo_flags & SCTP_SENDALL) {
+ /* its a sendall */
+ error = sctp_sendall(inp, uio, top, srcv);
+ top = NULL;
+ goto out_unlocked;
+ }
+ if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ error = EINVAL;
+ goto out_unlocked;
+ }
+ /* now we must find the assoc */
+ if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
+ (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
+ SCTP_INP_RLOCK(inp);
+ stcb = LIST_FIRST(&inp->sctp_asoc_list);
+ if (stcb == NULL) {
+ SCTP_INP_RUNLOCK(inp);
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
+ error = ENOTCONN;
+ goto out_unlocked;
+ }
+ SCTP_TCB_LOCK(stcb);
+ hold_tcblock = 1;
+ SCTP_INP_RUNLOCK(inp);
+ } else if (sinfo_assoc_id) {
+ stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
+ } else if (addr) {
+ /*-
+ * Since we did not use findep we must
+ * increment it, and if we don't find a tcb
+ * decrement it.
+ */
+ SCTP_INP_WLOCK(inp);
+ SCTP_INP_INCR_REF(inp);
+ SCTP_INP_WUNLOCK(inp);
+ stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
+ if (stcb == NULL) {
+ SCTP_INP_WLOCK(inp);
+ SCTP_INP_DECR_REF(inp);
+ SCTP_INP_WUNLOCK(inp);
+ } else {
+ hold_tcblock = 1;
+ }
+ }
+ if ((stcb == NULL) && (addr)) {
+ /* Possible implicit send? */
+ SCTP_ASOC_CREATE_LOCK(inp);
+ create_lock_applied = 1;
+ if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
+ (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
+ /* Should I really unlock ? */
+ SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ error = EINVAL;
+ goto out_unlocked;
+
+ }
+ if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
+ (addr->sa_family == AF_INET6)) {
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ error = EINVAL;
+ goto out_unlocked;
+ }
+ SCTP_INP_WLOCK(inp);
+ SCTP_INP_INCR_REF(inp);
+ SCTP_INP_WUNLOCK(inp);
+ /* With the lock applied look again */
+ stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
+ if (stcb == NULL) {
+ SCTP_INP_WLOCK(inp);
+ SCTP_INP_DECR_REF(inp);
+ SCTP_INP_WUNLOCK(inp);
+ } else {
+ hold_tcblock = 1;
+ }
+ if (t_inp != inp) {
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
+ error = ENOTCONN;
+ goto out_unlocked;
+ }
+ }
+ if (stcb == NULL) {
+ if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
+ (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
+ error = ENOTCONN;
+ goto out_unlocked;
+ }
+ if (addr == NULL) {
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
+ error = ENOENT;
+ goto out_unlocked;
+ } else {
+ /*
+ * UDP style, we must go ahead and start the INIT
+ * process
+ */
+ uint32_t vrf_id;
+
+ if ((sinfo_flags & SCTP_ABORT) ||
+ ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
+ /*-
+ * User asks to abort a non-existant assoc,
+ * or EOF a non-existant assoc with no data
+ */
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
+ error = ENOENT;
+ goto out_unlocked;
+ }
+ /* get an asoc/stcb struct */
+ vrf_id = inp->def_vrf_id;
+#ifdef INVARIANTS
+ if (create_lock_applied == 0) {
+ panic("Error, should hold create lock and I don't?");
+ }
+#endif
+ stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
+ p
+ );
+ if (stcb == NULL) {
+ /* Error is setup for us in the call */
+ goto out_unlocked;
+ }
+ if (create_lock_applied) {
+ SCTP_ASOC_CREATE_UNLOCK(inp);
+ create_lock_applied = 0;
+ } else {
+ SCTP_PRINTF("Huh-3? create lock should have been on??\n");
+ }
+ /*
+ * Turn on queue only flag to prevent data from
+ * being sent
+ */
+ queue_only = 1;
+ asoc = &stcb->asoc;
+ SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
+ (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
+
+ /* initialize authentication params for the assoc */
+ sctp_initialize_auth_params(inp, stcb);
+
+ if (control) {
+ /*
+ * see if a init structure exists in cmsg
+ * headers
+ */
+ struct sctp_initmsg initm;
+ int i;
+
+ if (sctp_find_cmsg(SCTP_INIT, (void *)&initm, control,
+ sizeof(initm))) {
+ /*
+ * we have an INIT override of the
+ * default
+ */
+ if (initm.sinit_max_attempts)
+ asoc->max_init_times = initm.sinit_max_attempts;
+ if (initm.sinit_num_ostreams)
+ asoc->pre_open_streams = initm.sinit_num_ostreams;
+ if (initm.sinit_max_instreams)
+ asoc->max_inbound_streams = initm.sinit_max_instreams;
+ if (initm.sinit_max_init_timeo)
+ asoc->initial_init_rto_max = initm.sinit_max_init_timeo;
+ if (asoc->streamoutcnt < asoc->pre_open_streams) {
+ struct sctp_stream_out *tmp_str;
+ int had_lock = 0;
+
+ /* Default is NOT correct */
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, defout:%d pre_open:%d\n",
+ asoc->streamoutcnt, asoc->pre_open_streams);
+ /*
+ * What happens if this
+ * fails? we panic ...
+ */
+
+ if (hold_tcblock) {
+ had_lock = 1;
+ SCTP_TCB_UNLOCK(stcb);
+ }
+ SCTP_MALLOC(tmp_str,
+ struct sctp_stream_out *,
+ (asoc->pre_open_streams *
+ sizeof(struct sctp_stream_out)),
+ SCTP_M_STRMO);
+ if (had_lock) {
+ SCTP_TCB_LOCK(stcb);
+ }
+ if (tmp_str != NULL) {
+ SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
+ asoc->strmout = tmp_str;
+ asoc->strm_realoutsize = asoc->streamoutcnt = asoc->pre_open_streams;
+ } else {
+ asoc->pre_open_streams = asoc->streamoutcnt;
+ }
+ for (i = 0; i < asoc->streamoutcnt; i++) {
+ /*-
+ * inbound side must be set
+ * to 0xffff, also NOTE when
+ * we get the INIT-ACK back
+ * (for INIT sender) we MUST
+ * reduce the count
+ * (streamoutcnt) but first
+ * check if we sent to any
+ * of the upper streams that
+ * were dropped (if some
+ * were). Those that were
+ * dropped must be notified
+ * to the upper layer as
+ * failed to send.
+ */
+ asoc->strmout[i].next_sequence_sent = 0x0;
+ TAILQ_INIT(&asoc->strmout[i].outqueue);
+ asoc->strmout[i].stream_no = i;
+ asoc->strmout[i].last_msg_incomplete = 0;
+ asoc->strmout[i].next_spoke.tqe_next = 0;
+ asoc->strmout[i].next_spoke.tqe_prev = 0;
+ }
+ }
+ }
+ }
+ hold_tcblock = 1;
+ /* out with the INIT */
+ queue_only_for_init = 1;
+ /*-
+ * we may want to dig in after this call and adjust the MTU
+ * value. It defaulted to 1500 (constant) but the ro
+ * structure may now have an update and thus we may need to
+ * change it BEFORE we append the message.
+ */
+ }
+ } else
+ asoc = &stcb->asoc;
+ if (srcv == NULL)
+ srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
+ if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
+ if (addr)
+ net = sctp_findnet(stcb, addr);
+ else
+ net = NULL;
+ if ((net == NULL) ||
+ ((port != 0) && (port != stcb->rport))) {
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ error = EINVAL;
+ goto out_unlocked;
+ }
+ } else {
+ net = stcb->asoc.primary_destination;
+ }
+ atomic_add_int(&stcb->total_sends, 1);
+ /* Keep the stcb from being freed under our feet */
+ atomic_add_int(&asoc->refcnt, 1);
+ free_cnt_applied = 1;
+
+ if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
+ if (sndlen > asoc->smallest_mtu) {
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
+ error = EMSGSIZE;
+ goto out_unlocked;
+ }
+ }
+ if ((SCTP_SO_IS_NBIO(so)
+ || (flags & MSG_NBIO)
+ )) {
+ non_blocking = 1;
+ }
+ /* would we block? */
+ if (non_blocking) {
+ if (hold_tcblock == 0) {
+ SCTP_TCB_LOCK(stcb);
+ hold_tcblock = 1;
+ }
+ inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
+ if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
+ (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
+ if (sndlen > SCTP_SB_LIMIT_SND(so))
+ error = EMSGSIZE;
+ else
+ error = EWOULDBLOCK;
+ goto out_unlocked;
+ }
+ stcb->asoc.sb_send_resv += sndlen;
+ SCTP_TCB_UNLOCK(stcb);
+ hold_tcblock = 0;
+ } else {
+ atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
+ }
+ local_soresv = sndlen;
+ if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
+ SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
+ error = ECONNRESET;
+ goto out_unlocked;
+ }
+ if (create_lock_applied) {
+ SCTP_ASOC_CREATE_UNLOCK(inp);
+ create_lock_applied = 0;
+ }
+ if (asoc->stream_reset_outstanding) {
+ /*
+ * Can't queue any data while stream reset is underway.
+ */
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN);
+ error = EAGAIN;
+ goto out_unlocked;
+ }
+ if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
+ (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
+ queue_only = 1;
+ }
+ /* we are now done with all control */
+ if (control) {
+ sctp_m_freem(control);
+ control = NULL;
+ }
+ if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
+ (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
+ (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
+ (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
+ if (srcv->sinfo_flags & SCTP_ABORT) {
+ ;
+ } else {
+ SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
+ error = ECONNRESET;
+ goto out_unlocked;
+ }
+ }
+#ifndef __rtems__
+ /* Ok, we will attempt a msgsnd :> */
+ if (p) {
+ p->td_ru.ru_msgsnd++;
+ }
+#endif /* __rtems__ */
+ /* Are we aborting? */
+ if (srcv->sinfo_flags & SCTP_ABORT) {
+ struct mbuf *mm;
+ int tot_demand, tot_out = 0, max_out;
+
+ SCTP_STAT_INCR(sctps_sends_with_abort);
+ if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
+ (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
+ /* It has to be up before we abort */
+ /* how big is the user initiated abort? */
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ error = EINVAL;
+ goto out;
+ }
+ if (hold_tcblock) {
+ SCTP_TCB_UNLOCK(stcb);
+ hold_tcblock = 0;
+ }
+ if (top) {
+ struct mbuf *cntm = NULL;
+
+ mm = sctp_get_mbuf_for_msg(1, 0, M_WAIT, 1, MT_DATA);
+ if (sndlen != 0) {
+ cntm = top;
+ while (cntm) {
+ tot_out += SCTP_BUF_LEN(cntm);
+ cntm = SCTP_BUF_NEXT(cntm);
+ }
+ }
+ tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
+ } else {
+ /* Must fit in a MTU */
+ tot_out = sndlen;
+ tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
+ if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
+ /* To big */
+ SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
+ error = EMSGSIZE;
+ goto out;
+ }
+ mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAIT, 1, MT_DATA);
+ }
+ if (mm == NULL) {
+ SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+ error = ENOMEM;
+ goto out;
+ }
+ max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
+ max_out -= sizeof(struct sctp_abort_msg);
+ if (tot_out > max_out) {
+ tot_out = max_out;
+ }
+ if (mm) {
+ struct sctp_paramhdr *ph;
+
+ /* now move forward the data pointer */
+ ph = mtod(mm, struct sctp_paramhdr *);
+ ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
+ ph->param_length = htons((sizeof(struct sctp_paramhdr) + tot_out));
+ ph++;
+ SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
+ if (top == NULL) {
+ error = uiomove((caddr_t)ph, (int)tot_out, uio);
+ if (error) {
+ /*-
+ * Here if we can't get his data we
+ * still abort we just don't get to
+ * send the users note :-0
+ */
+ sctp_m_freem(mm);
+ mm = NULL;
+ }
+ } else {
+ if (sndlen != 0) {
+ SCTP_BUF_NEXT(mm) = top;
+ }
+ }
+ }
+ if (hold_tcblock == 0) {
+ SCTP_TCB_LOCK(stcb);
+ hold_tcblock = 1;
+ }
+ atomic_add_int(&stcb->asoc.refcnt, -1);
+ free_cnt_applied = 0;
+ /* release this lock, otherwise we hang on ourselves */
+ sctp_abort_an_association(stcb->sctp_ep, stcb,
+ SCTP_RESPONSE_TO_USER_REQ,
+ mm, SCTP_SO_LOCKED);
+ /* now relock the stcb so everything is sane */
+ hold_tcblock = 0;
+ stcb = NULL;
+ /*
+ * In this case top is already chained to mm avoid double
+ * free, since we free it below if top != NULL and driver
+ * would free it after sending the packet out
+ */
+ if (sndlen != 0) {
+ top = NULL;
+ }
+ goto out_unlocked;
+ }
+ /* Calculate the maximum we can send */
+ inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
+ if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
+ if (non_blocking) {
+ /* we already checked for non-blocking above. */
+ max_len = sndlen;
+ } else {
+ max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
+ }
+ } else {
+ max_len = 0;
+ }
+ if (hold_tcblock) {
+ SCTP_TCB_UNLOCK(stcb);
+ hold_tcblock = 0;
+ }
+ /* Is the stream no. valid? */
+ if (srcv->sinfo_stream >= asoc->streamoutcnt) {
+ /* Invalid stream number */
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ error = EINVAL;
+ goto out_unlocked;
+ }
+ if (asoc->strmout == NULL) {
+ /* huh? software error */
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
+ error = EFAULT;
+ goto out_unlocked;
+ }
+ /* Unless E_EOR mode is on, we must make a send FIT in one call. */
+ if ((user_marks_eor == 0) &&
+ (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
+ /* It will NEVER fit */
+ SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
+ error = EMSGSIZE;
+ goto out_unlocked;
+ }
+ if ((uio == NULL) && user_marks_eor) {
+ /*-
+ * We do not support eeor mode for
+ * sending with mbuf chains (like sendfile).
+ */
+ SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ error = EINVAL;
+ goto out_unlocked;
+ }
+ if (user_marks_eor) {
+ local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
+ } else {
+ /*-
+ * For non-eeor the whole message must fit in
+ * the socket send buffer.
+ */
+ local_add_more = sndlen;
+ }
+ len = 0;
+ if (non_blocking) {
+ goto skip_preblock;
+ }
+ if (((max_len <= local_add_more) &&
+ (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
+ (max_len == 0) ||
+ ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
+ /* No room right now ! */
+ SOCKBUF_LOCK(&so->so_snd);
+ inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
+ while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
+ ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
+ (unsigned int)SCTP_SB_LIMIT_SND(so),
+ inqueue_bytes,
+ local_add_more,
+ stcb->asoc.stream_queue_cnt,
+ stcb->asoc.chunks_on_out_queue,
+ SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
+ sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, so, asoc, sndlen);
+ }
+ be.error = 0;
+ stcb->block_entry = &be;
+ error = sbwait(&so->so_snd);
+ stcb->block_entry = NULL;
+ if (error || so->so_error || be.error) {
+ if (error == 0) {
+ if (so->so_error)
+ error = so->so_error;
+ if (be.error) {
+ error = be.error;
+ }
+ }
+ SOCKBUF_UNLOCK(&so->so_snd);
+ goto out_unlocked;
+ }
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
+ sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
+ so, asoc, stcb->asoc.total_output_queue_size);
+ }
+ if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
+ goto out_unlocked;
+ }
+ inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
+ }
+ if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
+ max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
+ } else {
+ max_len = 0;
+ }
+ SOCKBUF_UNLOCK(&so->so_snd);
+ }
+skip_preblock:
+ if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
+ goto out_unlocked;
+ }
+ /*
+ * sndlen covers for mbuf case uio_resid covers for the non-mbuf
+ * case NOTE: uio will be null when top/mbuf is passed
+ */
+ if (sndlen == 0) {
+ if (srcv->sinfo_flags & SCTP_EOF) {
+ got_all_of_the_send = 1;
+ goto dataless_eof;
+ } else {
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ error = EINVAL;
+ goto out;
+ }
+ }
+ if (top == NULL) {
+ struct sctp_stream_queue_pending *sp;
+ struct sctp_stream_out *strm;
+ uint32_t sndout;
+
+ SCTP_TCB_SEND_LOCK(stcb);
+ if ((asoc->stream_locked) &&
+ (asoc->stream_locked_on != srcv->sinfo_stream)) {
+ SCTP_TCB_SEND_UNLOCK(stcb);
+ SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+ error = EINVAL;
+ goto out;
+ }
+ SCTP_TCB_SEND_UNLOCK(stcb);
+
+ strm = &stcb->asoc.strmout[srcv->sinfo_stream];
+ if (strm->last_msg_incomplete == 0) {
+ do_a_copy_in:
+ sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error, non_blocking);
+ if ((sp == NULL) || (error)) {
+ goto out;
+ }
+ SCTP_TCB_SEND_LOCK(stcb);
+ if (sp->msg_is_complete) {
+ strm->last_msg_incomplete = 0;
+ asoc->stream_locked = 0;
+ } else {
+ /*
+ * Just got locked to this guy in case of an
+ * interrupt.
+ */
+ strm->last_msg_incomplete = 1;
+ asoc->stream_locked = 1;
+ asoc->stream_locked_on = srcv->sinfo_stream;
+ sp->sender_all_done = 0;
+ }
+ sctp_snd_sb_alloc(stcb, sp->length);
+ atomic_add_int(&asoc->stream_queue_cnt, 1);
+ if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) {
+ sp->strseq = strm->next_sequence_sent;
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_SCTP) {
+ sctp_misc_ints(SCTP_STRMOUT_LOG_ASSIGN,
+ (uintptr_t) stcb, sp->length,
+ (uint32_t) ((srcv->sinfo_stream << 16) | sp->strseq), 0);
+ }
+ strm->next_sequence_sent++;
+ } else {
+ SCTP_STAT_INCR(sctps_sends_with_unord);
+ }
+ TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
+ if ((strm->next_spoke.tqe_next == NULL) &&
+ (strm->next_spoke.tqe_prev == NULL)) {
+ /* Not on wheel, insert */
+ sctp_insert_on_wheel(stcb, asoc, strm, 1);
+ }
+ SCTP_TCB_SEND_UNLOCK(stcb);
+ } else {
+ SCTP_TCB_SEND_LOCK(stcb);
+ sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
+ SCTP_TCB_SEND_UNLOCK(stcb);
+ if (sp == NULL) {
+ /* ???? Huh ??? last msg is gone */
+#ifdef INVARIANTS
+ panic("Warning: Last msg marked incomplete, yet nothing left?");
+#else
+ SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
+ strm->last_msg_incomplete = 0;
+#endif
+ goto do_a_copy_in;
+
+ }
+ }
+ while (uio->uio_resid > 0) {
+ /* How much room do we have? */
+ struct mbuf *new_tail, *mm;
+
+ if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
+ max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
+ else
+ max_len = 0;
+
+ if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
+ (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
+ (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
+ sndout = 0;
+ new_tail = NULL;
+ if (hold_tcblock) {
+ SCTP_TCB_UNLOCK(stcb);
+ hold_tcblock = 0;
+ }
+ mm = sctp_copy_resume(sp, uio, srcv, max_len, user_marks_eor, &error, &sndout, &new_tail);
+ if ((mm == NULL) || error) {
+ if (mm) {
+ sctp_m_freem(mm);
+ }
+ goto out;
+ }
+ /* Update the mbuf and count */
+ SCTP_TCB_SEND_LOCK(stcb);
+ if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
+ /*
+ * we need to get out. Peer probably
+ * aborted.
+ */
+ sctp_m_freem(mm);
+ if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
+ SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
+ error = ECONNRESET;
+ }
+ SCTP_TCB_SEND_UNLOCK(stcb);
+ goto out;
+ }
+ if (sp->tail_mbuf) {
+ /* tack it to the end */
+ SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
+ sp->tail_mbuf = new_tail;
+ } else {
+ /* A stolen mbuf */
+ sp->data = mm;
+ sp->tail_mbuf = new_tail;
+ }
+ sctp_snd_sb_alloc(stcb, sndout);
+ atomic_add_int(&sp->length, sndout);
+ len += sndout;
+
+ /* Did we reach EOR? */
+ if ((uio->uio_resid == 0) &&
+ ((user_marks_eor == 0) ||
+ (srcv->sinfo_flags & SCTP_EOF) ||
+ (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
+ sp->msg_is_complete = 1;
+ } else {
+ sp->msg_is_complete = 0;
+ }
+ SCTP_TCB_SEND_UNLOCK(stcb);
+ }
+ if (uio->uio_resid == 0) {
+ /* got it all? */
+ continue;
+ }
+ /* PR-SCTP? */
+ if ((asoc->peer_supports_prsctp) && (asoc->sent_queue_cnt_removeable > 0)) {
+ /*
+ * This is ugly but we must assure locking
+ * order
+ */
+ if (hold_tcblock == 0) {
+ SCTP_TCB_LOCK(stcb);
+ hold_tcblock = 1;
+ }
+ sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
+ inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
+ if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
+ max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
+ else
+ max_len = 0;
+ if (max_len > 0) {
+ continue;
+ }
+ SCTP_TCB_UNLOCK(stcb);
+ hold_tcblock = 0;
+ }
+ /* wait for space now */
+ if (non_blocking) {
+ /* Non-blocking io in place out */
+ goto skip_out_eof;
+ }
+ /* What about the INIT, send it maybe */
+ if (queue_only_for_init) {
+ if (hold_tcblock == 0) {
+ SCTP_TCB_LOCK(stcb);
+ hold_tcblock = 1;
+ }
+ if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
+ /* a collision took us forward? */
+ queue_only = 0;
+ } else {
+ sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
+ SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
+ queue_only = 1;
+ }
+ }
+ if ((net->flight_size > net->cwnd) &&
+ (asoc->sctp_cmt_on_off == 0)) {
+ SCTP_STAT_INCR(sctps_send_cwnd_avoid);
+ queue_only = 1;
+ } else if (asoc->ifp_had_enobuf) {
+ SCTP_STAT_INCR(sctps_ifnomemqueued);
+ if (net->flight_size > (2 * net->mtu)) {
+ queue_only = 1;
+ }
+ asoc->ifp_had_enobuf = 0;
+ }
+ un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
+ (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
+ if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
+ (stcb->asoc.total_flight > 0) &&
+ (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
+ (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
+
+ /*-
+ * Ok, Nagle is set on and we have data outstanding.
+ * Don't send anything and let SACKs drive out the
+ * data unless wen have a "full" segment to send.
+ */
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
+ sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
+ }
+ SCTP_STAT_INCR(sctps_naglequeued);
+ nagle_applies = 1;
+ } else {
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
+ if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
+ sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
+ }
+ SCTP_STAT_INCR(sctps_naglesent);
+ nagle_applies = 0;
+ }
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
+
+ sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
+ nagle_applies, un_sent);
+ sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
+ stcb->asoc.total_flight,
+ stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
+ }
+ if (queue_only_for_init)
+ queue_only_for_init = 0;
+ if ((queue_only == 0) && (nagle_applies == 0)) {
+ /*-
+ * need to start chunk output
+ * before blocking.. note that if
+ * a lock is already applied, then
+ * the input via the net is happening
+ * and I don't need to start output :-D
+ */
+ if (hold_tcblock == 0) {
+ if (SCTP_TCB_TRYLOCK(stcb)) {
+ hold_tcblock = 1;
+ sctp_chunk_output(inp,
+ stcb,
+ SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
+ }
+ } else {
+ sctp_chunk_output(inp,
+ stcb,
+ SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
+ }
+ if (hold_tcblock == 1) {
+ SCTP_TCB_UNLOCK(stcb);
+ hold_tcblock = 0;
+ }
+ }
+ SOCKBUF_LOCK(&so->so_snd);
+ /*-
+ * This is a bit strange, but I think it will
+ * work. The total_output_queue_size is locked and
+ * protected by the TCB_LOCK, which we just released.
+ * There is a race that can occur between releasing it
+ * above, and me getting the socket lock, where sacks
+ * come in but we have not put the SB_WAIT on the
+ * so_snd buffer to get the wakeup. After the LOCK
+ * is applied the sack_processing will also need to
+ * LOCK the so->so_snd to do the actual sowwakeup(). So
+ * once we have the socket buffer lock if we recheck the
+ * size we KNOW we will get to sleep safely with the
+ * wakeup flag in place.
+ */
+ if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
+ min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
+ sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
+ so, asoc, uio->uio_resid);
+ }
+ be.error = 0;
+ stcb->block_entry = &be;
+ error = sbwait(&so->so_snd);
+ stcb->block_entry = NULL;
+
+ if (error || so->so_error || be.error) {
+ if (error == 0) {
+ if (so->so_error)
+ error = so->so_error;
+ if (be.error) {
+ error = be.error;
+ }
+ }
+ SOCKBUF_UNLOCK(&so->so_snd);
+ goto out_unlocked;
+ }
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
+ sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
+ so, asoc, stcb->asoc.total_output_queue_size);
+ }
+ }
+ SOCKBUF_UNLOCK(&so->so_snd);
+ if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
+ goto out_unlocked;
+ }
+ }
+ SCTP_TCB_SEND_LOCK(stcb);
+ if (sp) {
+ if (sp->msg_is_complete == 0) {
+ strm->last_msg_incomplete = 1;
+ asoc->stream_locked = 1;
+ asoc->stream_locked_on = srcv->sinfo_stream;
+ } else {
+ sp->sender_all_done = 1;
+ strm->last_msg_incomplete = 0;
+ asoc->stream_locked = 0;
+ }
+ } else {
+ SCTP_PRINTF("Huh no sp TSNH?\n");
+ strm->last_msg_incomplete = 0;
+ asoc->stream_locked = 0;
+ }
+ SCTP_TCB_SEND_UNLOCK(stcb);
+ if (uio->uio_resid == 0) {
+ got_all_of_the_send = 1;
+ }
+ } else {
+ /* We send in a 0, since we do NOT have any locks */
+ error = sctp_msg_append(stcb, net, top, srcv, 0);
+ top = NULL;
+ if (srcv->sinfo_flags & SCTP_EOF) {
+ /*
+ * This should only happen for Panda for the mbuf
+ * send case, which does NOT yet support EEOR mode.
+ * Thus, we can just set this flag to do the proper
+ * EOF handling.
+ */
+ got_all_of_the_send = 1;
+ }
+ }
+ if (error) {
+ goto out;
+ }
+dataless_eof:
+ /* EOF thing ? */
+ if ((srcv->sinfo_flags & SCTP_EOF) &&
+ (got_all_of_the_send == 1) &&
+ (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE)) {
+ int cnt;
+
+ SCTP_STAT_INCR(sctps_sends_with_eof);
+ error = 0;
+ if (hold_tcblock == 0) {
+ SCTP_TCB_LOCK(stcb);
+ hold_tcblock = 1;
+ }
+ cnt = sctp_is_there_unsent_data(stcb);
+ if (TAILQ_EMPTY(&asoc->send_queue) &&
+ TAILQ_EMPTY(&asoc->sent_queue) &&
+ (cnt == 0)) {
+ if (asoc->locked_on_sending) {
+ goto abort_anyway;
+ }
+ /* there is nothing queued to send, so I'm done... */
+ if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
+ (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
+ (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
+ /* only send SHUTDOWN the first time through */
+ sctp_send_shutdown(stcb, stcb->asoc.primary_destination);
+ if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
+ SCTP_STAT_DECR_GAUGE32(sctps_currestab);
+ }
+ SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
+ SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
+ sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
+ asoc->primary_destination);
+ sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
+ asoc->primary_destination);
+ }
+ } else {
+ /*-
+ * we still got (or just got) data to send, so set
+ * SHUTDOWN_PENDING
+ */
+ /*-
+ * XXX sockets draft says that SCTP_EOF should be
+ * sent with no data. currently, we will allow user
+ * data to be sent first and move to
+ * SHUTDOWN-PENDING
+ */
+ if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
+ (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
+ (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
+ if (hold_tcblock == 0) {
+ SCTP_TCB_LOCK(stcb);
+ hold_tcblock = 1;
+ }
+ if (asoc->locked_on_sending) {
+ /* Locked to send out the data */
+ struct sctp_stream_queue_pending *sp;
+
+ sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
+ if (sp) {
+ if ((sp->length == 0) && (sp->msg_is_complete == 0))
+ asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
+ }
+ }
+ asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
+ if (TAILQ_EMPTY(&asoc->send_queue) &&
+ TAILQ_EMPTY(&asoc->sent_queue) &&
+ (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
+ abort_anyway:
+ if (free_cnt_applied) {
+ atomic_add_int(&stcb->asoc.refcnt, -1);
+ free_cnt_applied = 0;
+ }
+ sctp_abort_an_association(stcb->sctp_ep, stcb,
+ SCTP_RESPONSE_TO_USER_REQ,
+ NULL, SCTP_SO_LOCKED);
+ /*
+ * now relock the stcb so everything
+ * is sane
+ */
+ hold_tcblock = 0;
+ stcb = NULL;
+ goto out;
+ }
+ sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
+ asoc->primary_destination);
+ sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
+ }
+ }
+ }
+skip_out_eof:
+ if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
+ some_on_control = 1;
+ }
+ if (queue_only_for_init) {
+ if (hold_tcblock == 0) {
+ SCTP_TCB_LOCK(stcb);
+ hold_tcblock = 1;
+ }
+ if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
+ /* a collision took us forward? */
+ queue_only = 0;
+ } else {
+ sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
+ SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
+ queue_only = 1;
+ }
+ }
+ if ((net->flight_size > net->cwnd) &&
+ (stcb->asoc.sctp_cmt_on_off == 0)) {
+ SCTP_STAT_INCR(sctps_send_cwnd_avoid);
+ queue_only = 1;
+ } else if (asoc->ifp_had_enobuf) {
+ SCTP_STAT_INCR(sctps_ifnomemqueued);
+ if (net->flight_size > (2 * net->mtu)) {
+ queue_only = 1;
+ }
+ asoc->ifp_had_enobuf = 0;
+ }
+ un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
+ (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
+ if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
+ (stcb->asoc.total_flight > 0) &&
+ (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
+ (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
+ /*-
+ * Ok, Nagle is set on and we have data outstanding.
+ * Don't send anything and let SACKs drive out the
+ * data unless wen have a "full" segment to send.
+ */
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
+ sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
+ }
+ SCTP_STAT_INCR(sctps_naglequeued);
+ nagle_applies = 1;
+ } else {
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
+ if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
+ sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
+ }
+ SCTP_STAT_INCR(sctps_naglesent);
+ nagle_applies = 0;
+ }
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
+ sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
+ nagle_applies, un_sent);
+ sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
+ stcb->asoc.total_flight,
+ stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
+ }
+ if (queue_only_for_init)
+ queue_only_for_init = 0;
+ if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
+ /* we can attempt to send too. */
+ if (hold_tcblock == 0) {
+ /*
+ * If there is activity recv'ing sacks no need to
+ * send
+ */
+ if (SCTP_TCB_TRYLOCK(stcb)) {
+ sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
+ hold_tcblock = 1;
+ }
+ } else {
+ sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
+ }
+ } else if ((queue_only == 0) &&
+ (stcb->asoc.peers_rwnd == 0) &&
+ (stcb->asoc.total_flight == 0)) {
+ /* We get to have a probe outstanding */
+ if (hold_tcblock == 0) {
+ hold_tcblock = 1;
+ SCTP_TCB_LOCK(stcb);
+ }
+ sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
+ } else if (some_on_control) {
+ int num_out, reason, frag_point;
+
+ /* Here we do control only */
+ if (hold_tcblock == 0) {
+ hold_tcblock = 1;
+ SCTP_TCB_LOCK(stcb);
+ }
+ frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
+ (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
+ &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
+ }
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
+ queue_only, stcb->asoc.peers_rwnd, un_sent,
+ stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
+ stcb->asoc.total_output_queue_size, error);
+
+out:
+out_unlocked:
+
+ if (local_soresv && stcb) {
+ atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
+ local_soresv = 0;
+ }
+ if (create_lock_applied) {
+ SCTP_ASOC_CREATE_UNLOCK(inp);
+ create_lock_applied = 0;
+ }
+ if ((stcb) && hold_tcblock) {
+ SCTP_TCB_UNLOCK(stcb);
+ }
+ if (stcb && free_cnt_applied) {
+ atomic_add_int(&stcb->asoc.refcnt, -1);
+ }
+#ifdef INVARIANTS
+ if (stcb) {
+ if (mtx_owned(&stcb->tcb_mtx)) {
+ panic("Leaving with tcb mtx owned?");
+ }
+ if (mtx_owned(&stcb->tcb_send_mtx)) {
+ panic("Leaving with tcb send mtx owned?");
+ }
+ }
+#endif
+#ifdef INVARIANTS
+ if (inp) {
+ sctp_validate_no_locks(inp);
+ } else {
+ printf("Warning - inp is NULL so cant validate locks\n");
+ }
+#endif
+ if (top) {
+ sctp_m_freem(top);
+ }
+ if (control) {
+ sctp_m_freem(control);
+ }
+ return (error);
+}
+
+
+/*
+ * generate an AUTHentication chunk, if required
+ */
+struct mbuf *
+sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
+ struct sctp_auth_chunk **auth_ret, uint32_t * offset,
+ struct sctp_tcb *stcb, uint8_t chunk)
+{
+ struct mbuf *m_auth;
+ struct sctp_auth_chunk *auth;
+ int chunk_len;
+
+ if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
+ (stcb == NULL))
+ return (m);
+
+ /* sysctl disabled auth? */
+ if (SCTP_BASE_SYSCTL(sctp_auth_disable))
+ return (m);
+
+ /* peer doesn't do auth... */
+ if (!stcb->asoc.peer_supports_auth) {
+ return (m);
+ }
+ /* does the requested chunk require auth? */
+ if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
+ return (m);
+ }
+ m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_DONTWAIT, 1, MT_HEADER);
+ if (m_auth == NULL) {
+ /* no mbuf's */
+ return (m);
+ }
+ /* reserve some space if this will be the first mbuf */
+ if (m == NULL)
+ SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
+ /* fill in the AUTH chunk details */
+ auth = mtod(m_auth, struct sctp_auth_chunk *);
+ bzero(auth, sizeof(*auth));
+ auth->ch.chunk_type = SCTP_AUTHENTICATION;
+ auth->ch.chunk_flags = 0;
+ chunk_len = sizeof(*auth) +
+ sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
+ auth->ch.chunk_length = htons(chunk_len);
+ auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
+ /* key id and hmac digest will be computed and filled in upon send */
+
+ /* save the offset where the auth was inserted into the chain */
+ if (m != NULL) {
+ struct mbuf *cn;
+
+ *offset = 0;
+ cn = m;
+ while (cn) {
+ *offset += SCTP_BUF_LEN(cn);
+ cn = SCTP_BUF_NEXT(cn);
+ }
+ } else
+ *offset = 0;
+
+ /* update length and return pointer to the auth chunk */
+ SCTP_BUF_LEN(m_auth) = chunk_len;
+ m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
+ if (auth_ret != NULL)
+ *auth_ret = auth;
+
+ return (m);
+}
+
+#ifdef INET6
+int
+sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
+{
+ struct nd_prefix *pfx = NULL;
+ struct nd_pfxrouter *pfxrtr = NULL;
+ struct sockaddr_in6 gw6;
+
+ if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
+ return (0);
+
+ /* get prefix entry of address */
+ LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
+ if (pfx->ndpr_stateflags & NDPRF_DETACHED)
+ continue;
+ if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
+ &src6->sin6_addr, &pfx->ndpr_mask))
+ break;
+ }
+ /* no prefix entry in the prefix list */
+ if (pfx == NULL) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
+ SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
+ return (0);
+ }
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
+ SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
+
+ /* search installed gateway from prefix entry */
+ for (pfxrtr = pfx->ndpr_advrtrs.lh_first; pfxrtr; pfxrtr =
+ pfxrtr->pfr_next) {
+ memset(&gw6, 0, sizeof(struct sockaddr_in6));
+ gw6.sin6_family = AF_INET6;
+ gw6.sin6_len = sizeof(struct sockaddr_in6);
+ memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
+ sizeof(struct in6_addr));
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
+ SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
+ SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
+ if (sctp_cmpaddr((struct sockaddr *)&gw6,
+ ro->ro_rt->rt_gateway)) {
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
+ return (1);
+ }
+ }
+ SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
+ return (0);
+}
+
+#endif
+
+int
+sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
+{
+ struct sockaddr_in *sin, *mask;
+ struct ifaddr *ifa;
+ struct in_addr srcnetaddr, gwnetaddr;
+
+ if (ro == NULL || ro->ro_rt == NULL ||
+ sifa->address.sa.sa_family != AF_INET) {
+ return (0);
+ }
+ ifa = (struct ifaddr *)sifa->ifa;
+ mask = (struct sockaddr_in *)(ifa->ifa_netmask);
+ sin = (struct sockaddr_in *)&sifa->address.sin;
+ srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
+ SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
+
+ sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
+ gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
+ SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
+ SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
+ if (srcnetaddr.s_addr == gwnetaddr.s_addr) {
+ return (1);
+ }
+ return (0);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-08 06:40:54 +0000