add vrrp printing; from tcpdump.org

usr.sbin/tcpdump/Makefile

@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile,v 1.23 2000/10/19 16:31:41 jason Exp $
+#	$OpenBSD: Makefile,v 1.24 2000/12/07 21:52:38 mickey Exp $
 #
 #  Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994
 # 	The Regents of the University of California.  All rights reserved.
@@ -39,7 +39,7 @@ SRCS=	tcpdump.c addrtoname.c \
 	print-icmp.c print-sl.c print-ppp.c print-rip.c \
 	print-snmp.c print-ntp.c print-null.c print-egp.c print-ospf.c \
 	print-fddi.c print-llc.c print-sunrpc.c \
-	print-wb.c print-decnet.c print-isoclns.c print-ipx.c \
+	print-vrrp.c print-wb.c print-decnet.c print-isoclns.c print-ipx.c \
 	print-atm.c print-dvmrp.c print-krb.c print-pim.c print-netbios.c \
 	util.c bpf_dump.c parsenfsfh.c version.c machdep.c print-igrp.c \
 	print-gre.c print-radius.c print-enc.c print-cnfp.c \

usr.sbin/tcpdump/interface.h

@@ -1,4 +1,4 @@
-/*	$OpenBSD: interface.h,v 1.18 2000/10/19 16:31:42 jason Exp $	*/
+/*	$OpenBSD: interface.h,v 1.19 2000/12/07 21:52:38 mickey Exp $	*/
 
 /*
  * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
@@ -20,7 +20,7 @@
  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * @(#) $Header: /home/cvs/src/usr.sbin/tcpdump/interface.h,v 1.18 2000/10/19 16:31:42 jason Exp $ (LBL)
+ * @(#) $Header: /home/cvs/src/usr.sbin/tcpdump/interface.h,v 1.19 2000/12/07 21:52:38 mickey Exp $ (LBL)
  */
 
 #ifndef tcpdump_interface_h
@@ -199,6 +199,7 @@ extern void isoclns_print(const u_char *, u_int, u_int, const u_char *,
 	const u_char *);
 extern void krb_print(const u_char *, u_int);
 extern void l2tp_print(const u_char *dat, u_int length);
+extern void vrrp_print(const u_char *bp, u_int len, int ttl);
 extern void nfsreply_print(const u_char *, u_int, const u_char *);
 extern void nfsreq_print(const u_char *, u_int, const u_char *);
 extern void ns_print(const u_char *, u_int);
@@ -238,3 +239,5 @@ extern int rt6_print(const u_char *, const u_char *);
 extern void ospf6_print(const u_char *, u_int);
 extern void dhcp6_print(const u_char *, u_int, u_short, u_short);
 #endif /*INET6*/
+
+extern u_short in_cksum(const u_short *addr, register int len, u_short csum);

usr.sbin/tcpdump/print-ip.c

@@ -1,4 +1,4 @@
-/*	$OpenBSD: print-ip.c,v 1.11 2000/10/03 14:31:57 ho Exp $	*/
+/*	$OpenBSD: print-ip.c,v 1.12 2000/12/07 21:52:38 mickey Exp $	*/
 
 /*
  * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
@@ -23,7 +23,7 @@
 
 #ifndef lint
 static const char rcsid[] =
-    "@(#) $Header: /home/cvs/src/usr.sbin/tcpdump/print-ip.c,v 1.11 2000/10/03 14:31:57 ho Exp $ (LBL)";
+    "@(#) $Header: /home/cvs/src/usr.sbin/tcpdump/print-ip.c,v 1.12 2000/12/07 21:52:38 mickey Exp $ (LBL)";
 #endif
 
 #include <sys/param.h>
@@ -318,23 +318,34 @@ ip_optprint(register const u_char *cp, u_int length)
  * compute an IP header checksum.
  * don't modifiy the packet.
  */
-static int
+u_short
-in_cksum(const struct ip *ip)
+in_cksum(const u_short *addr, register int len, u_short csum)
 {
-	register const u_short *sp = (u_short *)ip;
+	int nleft = len;
-	register u_int32_t sum = 0;
+	const u_short *w = addr;
-	register int count;
+	u_short answer;
+	int sum = csum;
+
+ 	/*
+	 *  Our algorithm is simple, using a 32 bit accumulator (sum),
+	 *  we add sequential 16 bit words to it, and at the end, fold
+	 *  back all the carry bits from the top 16 bits into the lower
+	 *  16 bits.
+ 	 */
+	while (nleft > 1)  {
+		sum += *w++;
+		nleft -= 2;
+	}
+	if (nleft == 1)
+		sum += htons(*(u_char *)w<<8);
 
 	/*
-	 * No need for endian conversions.
+	 * add back carry outs from top 16 bits to low 16 bits
 	 */
-	for (count = ip->ip_hl * 2; --count >= 0; )
+	sum = (sum >> 16) + (sum & 0xffff);	/* add hi 16 to low 16 */
-		sum += *sp++;
+	sum += (sum >> 16);			/* add carry */
-	while (sum > 0xffff)
+	answer = ~sum;				/* truncate to 16 bits */
-		sum = (sum & 0xffff) + (sum >> 16);
+	return (answer);
-	sum = ~sum & 0xffff;
-
-	return (sum);
 }
 
 /*
@@ -520,6 +531,12 @@ ip_print(register const u_char *bp, register u_int length)
 				return;
 			}
 			break;
+#ifndef IPPROTO_VRRP  
+#define IPPROTO_VRRP 112
+#endif
+		case IPPROTO_VRRP:
+			vrrp_print(cp, len, ip->ip_ttl);
+			break;
 
 		default:
 			(void)printf("%s > %s:", ipaddr_string(&ip->ip_src),
@@ -581,7 +598,7 @@ ip_print(register const u_char *bp, register u_int length)
 			sep = ", ";
 		}
 		if ((u_char *)ip + hlen <= snapend) {
-			sum = in_cksum(ip);
+			sum = in_cksum((const u_short *)ip, hlen, 0);
 			if (sum != 0) {
 				(void)printf("%sbad cksum %x!", sep,
 					     ntohs(ip->ip_sum));

usr.sbin/tcpdump/print-vrrp.c

@@ -0,0 +1,125 @@
+/*	$OpenBSD: print-vrrp.c,v 1.1 2000/12/07 21:52:38 mickey 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)
+ *
+ * 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.
+ *
+ * from tcpdump.org:
+ * Header: /tcpdump/master/tcpdump/print-vrrp.c,v 1.3 2000/10/10 05:05:08 guy Exp
+ */
+
+#ifndef lint
+static const char rcsid[] =
+    "@(#) $Header: /home/cvs/src/usr.sbin/tcpdump/print-vrrp.c,v 1.1 2000/12/07 21:52:38 mickey Exp $";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <netinet/in.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)                   |
+ *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+void
+vrrp_print(register const u_char *bp, register u_int len, int ttl)
+{
+	int version, type, auth_type;
+	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("VRRPv%d-%s %d: ", version, type_s, len);
+	if (ttl != 255)
+		printf("[ttl=%d!] ", ttl);
+	if (version != 2 || type != 1)
+		return;
+	TCHECK(bp[2]);
+	printf("vrid=%d prio=%d", bp[1], bp[2]);
+	TCHECK(bp[5]);
+	auth_type = bp[4];
+	if (auth_type != 0)
+		printf(" authtype=%d", auth_type);
+	printf(" intvl=%d", bp[5]);
+	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 == 1) { /* simple text password */
+			TCHECK(bp[7]);
+			printf(" auth %.8s", bp);
+		}
+	}
+	return;
+trunc:
+	printf("[|vrrp]");
+}