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, 90 insertions, 0 deletions

diff --git a/freebsd/contrib/tcpdump/print-carp.c b/freebsd/contrib/tcpdump/print-carp.c
new file mode 100644
index 00000000..e58c4c85
--- /dev/null
+++ b/freebsd/contrib/tcpdump/print-carp.c
@@ -0,0 +1,90 @@
+#include <machine/rtems-bsd-user-space.h>
+
+/*	$OpenBSD: print-carp.c,v 1.6 2009/10/27 23:59:55 deraadt Exp $	*/
+
+/*
+ * Copyright (c) 2000 William C. Fenner.
+ *                All rights reserved.
+ *
+ * Kevin Steves <ks@hp.se> July 2000
+ * Modified to:
+ * - print version, type string and packet length
+ * - print IP address count if > 1 (-v)
+ * - verify checksum (-v)
+ * - print authentication string (-v)
+ *
+ * Copyright (c) 2011 Advanced Computing Technologies
+ * George V. Neille-Neil
+ *
+ * Modified to:
+ * - work correctly with CARP
+ * - compile into the latest tcpdump
+ * - print out the counter
+ *
+ * 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.
+ * The name of William C. Fenner may not be used to endorse or
+ * promote products derived from this software without specific prior
+ * written permission.  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.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <netinet/in.h>
+
+#include "interface.h"
+#include "extract.h"
+#include "addrtoname.h"
+
+void
+carp_print(register const u_char *bp, register u_int len, int ttl)
+{
+	int version, type;
+	const char *type_s;
+
+	TCHECK(bp[0]);
+	version = (bp[0] & 0xf0) >> 4;
+	type = bp[0] & 0x0f;
+	if (type == 1)
+		type_s = "advertise";
+	else
+		type_s = "unknown";
+	printf("CARPv%d-%s %d: ", version, type_s, len);
+	if (ttl != 255)
+		printf("[ttl=%d!] ", ttl);
+	if (version != 2 || type != 1)
+		return;
+	TCHECK(bp[2]);
+	TCHECK(bp[5]);
+	printf("vhid=%d advbase=%d advskew=%d authlen=%d ",
+	    bp[1], bp[5], bp[2], bp[3]);
+	if (vflag) {
+		struct cksum_vec vec[1];
+		vec[0].ptr = (const u_int8_t *)bp;
+		vec[0].len = len;
+		if (TTEST2(bp[0], len) && in_cksum(vec, 1))
+			printf(" (bad carp cksum %x!)",
+				EXTRACT_16BITS(&bp[6]));
+	}
+	printf("counter=%" PRIu64, EXTRACT_64BITS(&bp[8]));
+
+	return;
+trunc:
+	printf("[|carp]");
+}