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, 175 insertions, 0 deletions

diff --git a/freebsd/contrib/tcpdump/print-udld.c b/freebsd/contrib/tcpdump/print-udld.c
new file mode 100644
index 00000000..82135c9d
--- /dev/null
+++ b/freebsd/contrib/tcpdump/print-udld.c
@@ -0,0 +1,175 @@
+#include <machine/rtems-bsd-user-space.h>
+
+/*
+ * Copyright (c) 1998-2007 The TCPDUMP project
+ *
+ * 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.
+ *
+ * UNIDIRECTIONAL LINK DETECTION (UDLD) as per 
+ * http://www.ietf.org/internet-drafts/draft-foschiano-udld-02.txt
+ *
+ * Original code by Carles Kishimoto <carles.kishimoto@gmail.com>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <stdio.h>
+#include <string.h>
+
+#include "interface.h"
+#include "addrtoname.h"
+#include "extract.h"		
+#include "nlpid.h"
+
+#define UDLD_HEADER_LEN			4
+#define UDLD_DEVICE_ID_TLV		0x0001
+#define UDLD_PORT_ID_TLV		0x0002
+#define UDLD_ECHO_TLV			0x0003
+#define UDLD_MESSAGE_INTERVAL_TLV	0x0004
+#define UDLD_TIMEOUT_INTERVAL_TLV	0x0005
+#define UDLD_DEVICE_NAME_TLV		0x0006
+#define UDLD_SEQ_NUMBER_TLV		0x0007
+
+static struct tok udld_tlv_values[] = {
+    { UDLD_DEVICE_ID_TLV, "Device-ID TLV"},
+    { UDLD_PORT_ID_TLV, "Port-ID TLV"},
+    { UDLD_ECHO_TLV, "Echo TLV"},
+    { UDLD_MESSAGE_INTERVAL_TLV, "Message Interval TLV"},
+    { UDLD_TIMEOUT_INTERVAL_TLV, "Timeout Interval TLV"},
+    { UDLD_DEVICE_NAME_TLV, "Device Name TLV"},
+    { UDLD_SEQ_NUMBER_TLV,"Sequence Number TLV"},
+    { 0, NULL}
+};
+
+static struct tok udld_code_values[] = {
+    { 0x00, "Reserved"},
+    { 0x01, "Probe message"},
+    { 0x02, "Echo message"},
+    { 0x03, "Flush message"},
+    { 0, NULL}
+};
+
+static struct tok udld_flags_values[] = {
+    { 0x00, "RT"},
+    { 0x01, "RSY"},
+    { 0, NULL}
+};
+
+/*
+ *
+ * 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 
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 
+ * | Ver | Opcode  |     Flags     |           Checksum            | 
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 
+ * |               List of TLVs (variable length list)             | 
+ * |                              ...                              | 
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 
+ *
+ */
+
+#define	UDLD_EXTRACT_VERSION(x) (((x)&0xe0)>>5) 
+#define	UDLD_EXTRACT_OPCODE(x) ((x)&0x1f) 
+
+void
+udld_print (const u_char *pptr, u_int length)
+{
+    int code, type, len;
+    const u_char *tptr;
+
+    if (length < UDLD_HEADER_LEN)
+        goto trunc;
+
+    tptr = pptr; 
+
+    if (!TTEST2(*tptr, UDLD_HEADER_LEN))	
+	goto trunc;
+
+    code = UDLD_EXTRACT_OPCODE(*tptr);
+
+    printf("UDLDv%u, Code %s (%x), Flags [%s] (0x%02x), length %u", 
+           UDLD_EXTRACT_VERSION(*tptr),
+           tok2str(udld_code_values, "Reserved", code),
+           code,
+           bittok2str(udld_flags_values, "none", *(tptr+1)),
+           *(tptr+1),
+           length);
+
+    /*
+     * In non-verbose mode, just print version and opcode type
+     */
+    if (vflag < 1) {
+	return;
+    }
+
+    printf("\n\tChecksum 0x%04x (unverified)", EXTRACT_16BITS(tptr+2));
+
+    tptr += UDLD_HEADER_LEN;
+
+    while (tptr < (pptr+length)) {
+
+        if (!TTEST2(*tptr, 4)) 
+            goto trunc;
+
+	type = EXTRACT_16BITS(tptr);
+        len  = EXTRACT_16BITS(tptr+2); 
+        len -= 4;
+        tptr += 4;
+
+        /* infinite loop check */
+        if (type == 0 || len == 0) {
+            return;
+        }
+
+        printf("\n\t%s (0x%04x) TLV, length %u",
+               tok2str(udld_tlv_values, "Unknown", type),
+               type, len);
+
+        switch (type) {
+        case UDLD_DEVICE_ID_TLV:
+        case UDLD_PORT_ID_TLV:
+        case UDLD_ECHO_TLV:
+        case UDLD_DEVICE_NAME_TLV: 
+            printf(", %s", tptr);
+            break;
+
+        case UDLD_MESSAGE_INTERVAL_TLV: 
+        case UDLD_TIMEOUT_INTERVAL_TLV:
+            printf(", %us", (*tptr));
+            break;
+
+        case UDLD_SEQ_NUMBER_TLV:
+            printf(", %u", EXTRACT_32BITS(tptr));
+            break;
+
+        default:
+            break;
+        }	
+        tptr += len;
+    }
+
+    return;
+
+ trunc:
+    printf("[|udld]");
+}
+
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 4
+ * End:
+ */