diff options
Diffstat (limited to 'contrib/tcpdump/print-vrrp.c')
| -rw-r--r-- | contrib/tcpdump/print-vrrp.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-vrrp.c b/contrib/tcpdump/print-vrrp.c new file mode 100644 index 0000000..6b7ac94 --- /dev/null +++ b/contrib/tcpdump/print-vrrp.c @@ -0,0 +1,120 @@ +/* + * 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[] = + "@(#) $Header: /tcpdump/master/tcpdump/print-vrrp.c,v 1.3 2000/10/10 05:05:08 guy 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]"); +} |
