print-msdp.c revision 146773
164562Sgshapiro/* 264562Sgshapiro * Copyright (c) 2001 William C. Fenner. 364562Sgshapiro * All rights reserved. 464562Sgshapiro * 564562Sgshapiro * Redistribution and use in source and binary forms, with or without 6111823Sgshapiro * modification, are permitted provided that: (1) source code 764562Sgshapiro * distributions retain the above copyright notice and this paragraph 864562Sgshapiro * in its entirety, and (2) distributions including binary code include 964562Sgshapiro * the above copyright notice and this paragraph in its entirety in 1064562Sgshapiro * the documentation or other materials provided with the distribution. 1164562Sgshapiro * The name of William C. Fenner may not be used to endorse or 1264562Sgshapiro * promote products derived from this software without specific prior 1364562Sgshapiro * written permission. THIS SOFTWARE IS PROVIDED ``AS IS'' AND 1464562Sgshapiro * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT 1564562Sgshapiro * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 1664562Sgshapiro * FOR A PARTICULAR PURPOSE. 17159609Sgshapiro */ 1864562Sgshapiro#ifndef lint 1964562Sgshapirostatic const char rcsid[] _U_ = 2064562Sgshapiro "@(#) $Header: /tcpdump/master/tcpdump/print-msdp.c,v 1.7 2005/04/06 21:32:41 mcr Exp $"; 2164562Sgshapiro#endif 2264562Sgshapiro 2364562Sgshapiro#ifdef HAVE_CONFIG_H 2464562Sgshapiro#include "config.h" 2564562Sgshapiro#endif 26159609Sgshapiro 27159609Sgshapiro#include <tcpdump-stdinc.h> 28159609Sgshapiro 29159609Sgshapiro#include <stdio.h> 30159609Sgshapiro#include <stdlib.h> 31159609Sgshapiro 32159609Sgshapiro#include "interface.h" 33159609Sgshapiro#include "addrtoname.h" 34159609Sgshapiro#include "extract.h" 35159609Sgshapiro 36159609Sgshapiro#define MSDP_TYPE_MAX 7 37159609Sgshapiro 38159609Sgshapirovoid 39159609Sgshapiromsdp_print(const unsigned char *sp, u_int length) 40159609Sgshapiro{ 41159609Sgshapiro unsigned int type, len; 42159609Sgshapiro 43159609Sgshapiro TCHECK2(*sp, 3); 44159609Sgshapiro /* See if we think we're at the beginning of a compound packet */ 45159609Sgshapiro type = *sp; 46159609Sgshapiro len = EXTRACT_16BITS(sp + 1); 4780785Sgshapiro if (len > 1500 || len < 3 || type == 0 || type > MSDP_TYPE_MAX) 48159609Sgshapiro goto trunc; /* not really truncated, but still not decodable */ 49159609Sgshapiro (void)printf(" msdp:"); 50159609Sgshapiro while (length > 0) { 51159609Sgshapiro TCHECK2(*sp, 3); 52159609Sgshapiro type = *sp; 53159609Sgshapiro len = EXTRACT_16BITS(sp + 1); 54159609Sgshapiro if (len > 1400 || vflag) 55159609Sgshapiro printf(" [len %u]", len); 56159609Sgshapiro if (len < 3) 57159609Sgshapiro goto trunc; 58159609Sgshapiro sp += 3; 59159609Sgshapiro length -= 3; 60159609Sgshapiro switch (type) { 61159609Sgshapiro case 1: /* IPv4 Source-Active */ 62159609Sgshapiro case 3: /* IPv4 Source-Active Response */ 63159609Sgshapiro if (type == 1) 64159609Sgshapiro (void)printf(" SA"); 65159609Sgshapiro else 6680785Sgshapiro (void)printf(" SA-Response"); 67159609Sgshapiro TCHECK(*sp); 68159609Sgshapiro (void)printf(" %u entries", *sp); 69159609Sgshapiro if ((u_int)((*sp * 12) + 8) < len) { 70159609Sgshapiro (void)printf(" [w/data]"); 71159609Sgshapiro if (vflag > 1) { 72159609Sgshapiro (void)printf(" "); 73159609Sgshapiro ip_print(gndo, sp + *sp * 12 + 8 - 3, 74159609Sgshapiro len - (*sp * 12 + 8)); 75159609Sgshapiro } 76159609Sgshapiro } 77159609Sgshapiro break; 78159609Sgshapiro case 2: 79159609Sgshapiro (void)printf(" SA-Request"); 80159609Sgshapiro TCHECK2(*sp, 5); 81159609Sgshapiro (void)printf(" for %s", ipaddr_string(sp + 1)); 82159609Sgshapiro break; 83159609Sgshapiro case 4: 84159609Sgshapiro (void)printf(" Keepalive"); 85159609Sgshapiro if (len != 3) 86159609Sgshapiro (void)printf("[len=%d] ", len); 87159609Sgshapiro break; 88159609Sgshapiro case 5: 89159609Sgshapiro (void)printf(" Notification"); 90159609Sgshapiro break; 91159609Sgshapiro default: 92159609Sgshapiro (void)printf(" [type=%d len=%d]", type, len); 93159609Sgshapiro break; 94159609Sgshapiro } 95159609Sgshapiro sp += (len - 3); 96159609Sgshapiro length -= (len - 3); 97159609Sgshapiro } 98159609Sgshapiro return; 99159609Sgshapirotrunc: 100159609Sgshapiro (void)printf(" [|msdp]"); 101159609Sgshapiro} 102159609Sgshapiro 103159609Sgshapiro/* 104159609Sgshapiro * Local Variables: 105159609Sgshapiro * c-style: whitesmith 106159609Sgshapiro * c-basic-offset: 8 107159609Sgshapiro * End: 108159609Sgshapiro */ 109159609Sgshapiro