Add tcpdump and libpcap.

- Update the file builder generator to handle generator specific cflags and
  includes. The tcpdump and libpcap have localised headers and need specific
  headers paths to see them. There are also module specific flags and these
  need to be passed to the lex and yacc generators.

- Add the tcpdump support.

1 files changed, 81 insertions, 0 deletions

diff --git a/freebsd/contrib/tcpdump/print-otv.c b/freebsd/contrib/tcpdump/print-otv.c
new file mode 100644
index 00000000..12da24c8
--- /dev/null
+++ b/freebsd/contrib/tcpdump/print-otv.c
@@ -0,0 +1,81 @@
+#include <machine/rtems-bsd-user-space.h>
+
+/*
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code
+ * distributions retain the above copyright notice and this paragraph
+ * in its entirety, and (2) distributions including binary code include
+ * the above copyright notice and this paragraph in its entirety in
+ * the documentation or other materials provided with the distribution.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
+ * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
+ * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE.
+ *
+ * Original code by Francesco Fondelli (francesco dot fondelli, gmail dot com)
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "interface.h"
+#include "extract.h"
+#include "addrtoname.h"
+
+#include "udp.h"
+
+/*
+ * OTV header, draft-hasmit-otv-04
+ *
+ *     0                   1                   2                   3
+ *     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *     |R|R|R|R|I|R|R|R|           Overlay ID                          |
+ *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *     |          Instance ID                          | Reserved      |
+ *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+
+void
+otv_print(const u_char *bp, u_int len)
+{
+    u_int8_t flags;
+    u_int32_t overlay_id;
+    u_int32_t instance_id;
+    
+    if (len < 8) {
+        printf("[|OTV]");
+        return;
+    }
+
+    flags = *bp;
+    bp += 1;
+
+    overlay_id = EXTRACT_24BITS(bp);
+    bp += 3;
+
+    instance_id = EXTRACT_24BITS(bp);
+    bp += 4;
+
+    printf("OTV, ");
+
+    fputs("flags [", stdout);
+    if (flags & 0x08)
+        fputs("I", stdout);
+    else
+        fputs(".", stdout);
+    fputs("] ", stdout);
+
+    printf("(0x%02x), ", flags);
+    printf("overlay %u, ", overlay_id);
+    printf("instance %u\n", instance_id);
+
+    ether_print(gndo, bp, len - 8, len - 8, NULL, NULL);
+    return;
+}