diff options
Diffstat (limited to 'print-hsrp.c')
| -rw-r--r-- | print-hsrp.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/print-hsrp.c b/print-hsrp.c new file mode 100644 index 0000000..06304fd --- /dev/null +++ b/print-hsrp.c @@ -0,0 +1,140 @@ +/* + * Copyright (C) 2001 Julian Cowley + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the project nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* Cisco Hot Standby Router Protocol (HSRP). */ + +#ifndef lint +static const char rcsid[] _U_ = + "@(#) $Header: /tcpdump/master/tcpdump/print-hsrp.c,v 1.10 2005-05-06 07:56:52 guy Exp $"; +#endif + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <tcpdump-stdinc.h> + +#include <stdio.h> + +#include "interface.h" +#include "addrtoname.h" + +/* HSRP op code types. */ +static const char *op_code_str[] = { + "hello", + "coup", + "resign" +}; + +/* HSRP states and associated names. */ +static struct tok states[] = { + { 0, "initial" }, + { 1, "learn" }, + { 2, "listen" }, + { 4, "speak" }, + { 8, "standby" }, + { 16, "active" }, + { 0, NULL } +}; + +/* + * RFC 2281: + * + * 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 | Op Code | State | Hellotime | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | Holdtime | Priority | Group | Reserved | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | Authentication Data | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | Authentication Data | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | Virtual IP Address | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + */ + +#define HSRP_AUTH_SIZE 8 + +/* HSRP protocol header. */ +struct hsrp { + u_int8_t hsrp_version; + u_int8_t hsrp_op_code; + u_int8_t hsrp_state; + u_int8_t hsrp_hellotime; + u_int8_t hsrp_holdtime; + u_int8_t hsrp_priority; + u_int8_t hsrp_group; + u_int8_t hsrp_reserved; + u_int8_t hsrp_authdata[HSRP_AUTH_SIZE]; + struct in_addr hsrp_virtaddr; +}; + +void +hsrp_print(register const u_int8_t *bp, register u_int len) +{ + struct hsrp *hp = (struct hsrp *) bp; + + TCHECK(hp->hsrp_version); + printf("HSRPv%d", hp->hsrp_version); + if (hp->hsrp_version != 0) + return; + TCHECK(hp->hsrp_op_code); + printf("-"); + printf("%s ", tok2strary(op_code_str, "unknown (%d)", hp->hsrp_op_code)); + printf("%d: ", len); + TCHECK(hp->hsrp_state); + printf("state=%s ", tok2str(states, "Unknown (%d)", hp->hsrp_state)); + TCHECK(hp->hsrp_group); + printf("group=%d ", hp->hsrp_group); + TCHECK(hp->hsrp_reserved); + if (hp->hsrp_reserved != 0) { + printf("[reserved=%d!] ", hp->hsrp_reserved); + } + TCHECK(hp->hsrp_virtaddr); + printf("addr=%s", ipaddr_string(&hp->hsrp_virtaddr)); + if (vflag) { + printf(" hellotime="); + relts_print(hp->hsrp_hellotime); + printf(" holdtime="); + relts_print(hp->hsrp_holdtime); + printf(" priority=%d", hp->hsrp_priority); + printf(" auth=\""); + if (fn_printn(hp->hsrp_authdata, sizeof(hp->hsrp_authdata), + snapend)) { + printf("\""); + goto trunc; + } + printf("\""); + } + return; +trunc: + printf("[|hsrp]"); +} |