/* * Copyright (c) 2001 William C. Fenner. * All rights reserved. * * 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[] _U_ = "@(#) $Header: /tcpdump/master/tcpdump/print-msdp.c,v 1.4.2.2 2003/11/16 08:51:34 guy Exp $"; #endif #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include "interface.h" #include "addrtoname.h" #include "extract.h" #define MSDP_TYPE_MAX 7 void msdp_print(const unsigned char *sp, u_int length) { unsigned int type, len; TCHECK2(*sp, 3); /* See if we think we're at the beginning of a compound packet */ type = *sp; len = EXTRACT_16BITS(sp + 1); if (len > 1500 || len < 3 || type == 0 || type > MSDP_TYPE_MAX) goto trunc; /* not really truncated, but still not decodable */ (void)printf(" msdp:"); while (length > 0) { TCHECK2(*sp, 3); type = *sp; len = EXTRACT_16BITS(sp + 1); if (len > 1400 || vflag) printf(" [len %u]", len); if (len < 3) goto trunc; sp += 3; length -= 3; switch (type) { case 1: /* IPv4 Source-Active */ case 3: /* IPv4 Source-Active Response */ if (type == 1) (void)printf(" SA"); else (void)printf(" SA-Response"); TCHECK(*sp); (void)printf(" %u entries", *sp); if ((u_int)((*sp * 12) + 8) < len) { (void)printf(" [w/data]"); if (vflag > 1) { (void)printf(" "); ip_print(sp + *sp * 12 + 8 - 3, len - (*sp * 12 + 8)); } } break; case 2: (void)printf(" SA-Request"); TCHECK2(*sp, 5); (void)printf(" for %s", ipaddr_string(sp + 1)); break; case 4: (void)printf(" Keepalive"); if (len != 3) (void)printf("[len=%d] ", len); break; case 5: (void)printf(" Notification"); break; default: (void)printf(" [type=%d len=%d]", type, len); break; } sp += (len - 3); length -= (len - 3); } return; trunc: (void)printf(" [|msdp]"); }