1 files changed, 141 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-vrrp.c b/contrib/tcpdump/print-vrrp.c
new file mode 100644
index 0000000..899542d
--- /dev/null
+++ b/contrib/tcpdump/print-vrrp.c
@@ -0,0 +1,141 @@
+/*
+ * 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)
+ *
+ * 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.
+ */
+
+#ifndef lint
+static const char rcsid[] _U_ =
+    "@(#) $Header: /tcpdump/master/tcpdump/print-vrrp.c,v 1.10 2005-05-06 07:56:54 guy Exp $";
+#endif
+
+#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"
+
+/*
+ * RFC 2338:
+ *     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
+ *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *    |Version| Type  | Virtual Rtr ID|   Priority    | Count IP Addrs|
+ *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *    |   Auth Type   |   Adver Int   |          Checksum             |
+ *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *    |                         IP Address (1)                        |
+ *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *    |                            .                                  |
+ *    |                            .                                  |
+ *    |                            .                                  |
+ *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *    |                         IP Address (n)                        |
+ *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *    |                     Authentication Data (1)                   |
+ *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *    |                     Authentication Data (2)                   |
+ *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+
+/* Type */
+#define	VRRP_TYPE_ADVERTISEMENT	1
+
+static const struct tok type2str[] = {
+	{ VRRP_TYPE_ADVERTISEMENT,	"Advertisement"	},
+	{ 0,				NULL		}
+};
+
+/* Auth Type */
+#define	VRRP_AUTH_NONE		0
+#define	VRRP_AUTH_SIMPLE	1
+#define	VRRP_AUTH_AH		2
+
+static const struct tok auth2str[] = {
+	{ VRRP_AUTH_NONE,		"none"		},
+	{ VRRP_AUTH_SIMPLE,		"simple"	},
+	{ VRRP_AUTH_AH,			"ah"		},
+	{ 0,				NULL		}
+};
+
+void
+vrrp_print(register const u_char *bp, register u_int len, int ttl)
+{
+	int version, type, auth_type;
+	const char *type_s;
+
+	TCHECK(bp[0]);
+	version = (bp[0] & 0xf0) >> 4;
+	type = bp[0] & 0x0f;
+	type_s = tok2str(type2str, "unknown type (%u)", type);
+	printf("VRRPv%u, %s", version, type_s);
+	if (ttl != 255)
+		printf(", (ttl %u)", ttl);
+	if (version != 2 || type != VRRP_TYPE_ADVERTISEMENT)
+		return;
+	TCHECK(bp[2]);
+	printf(", vrid %u, prio %u", bp[1], bp[2]);
+	TCHECK(bp[5]);
+	auth_type = bp[4];
+	printf(", authtype %s", tok2str(auth2str, NULL, auth_type));
+	printf(", intvl %us, length %u", bp[5],len);
+	if (vflag) {
+		int naddrs = bp[3];
+		int i;
+		char c;
+
+		if (TTEST2(bp[0], len) && in_cksum((const u_short*)bp, len, 0))
+			printf(", (bad vrrp cksum %x)",
+				EXTRACT_16BITS(&bp[6]));
+		printf(", addrs");
+		if (naddrs > 1)
+			printf("(%d)", naddrs);
+		printf(":");
+		c = ' ';
+		bp += 8;
+		for (i = 0; i < naddrs; i++) {
+			TCHECK(bp[3]);
+			printf("%c%s", c, ipaddr_string(bp));
+			c = ',';
+			bp += 4;
+		}
+		if (auth_type == VRRP_AUTH_SIMPLE) { /* simple text password */
+			TCHECK(bp[7]);
+			printf(" auth \"");
+			if (fn_printn(bp, 8, snapend)) {
+				printf("\"");
+				goto trunc;
+			}
+			printf("\"");
+		}
+	}
+	return;
+trunc:
+	printf("[|vrrp]");
+}