/* $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: /cvs/OpenBSD/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]"); }