/* * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994, 1995, 1996 * The Regents of the University of California. 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, (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, and (3) all advertising materials mentioning * features or use of this software display the following acknowledgement: * ``This product includes software developed by the University of California, * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of * the University 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 ``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-igmp.c,v 1.11.2.3 2003/11/19 09:41:29 guy Exp $ (LBL)"; #endif #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include "interface.h" #include "addrtoname.h" #include "extract.h" /* must come after interface.h */ #ifndef IN_CLASSD #define IN_CLASSD(i) (((int32_t)(i) & 0xf0000000) == 0xe0000000) #endif /* (following from ipmulti/mrouted/prune.h) */ /* * The packet format for a traceroute request. */ struct tr_query { u_int32_t tr_src; /* traceroute source */ u_int32_t tr_dst; /* traceroute destination */ u_int32_t tr_raddr; /* traceroute response address */ u_int32_t tr_rttlqid; /* response ttl and qid */ }; #define TR_GETTTL(x) (int)(((x) >> 24) & 0xff) #define TR_GETQID(x) ((x) & 0x00ffffff) /* * Traceroute response format. A traceroute response has a tr_query at the * beginning, followed by one tr_resp for each hop taken. */ struct tr_resp { u_int32_t tr_qarr; /* query arrival time */ u_int32_t tr_inaddr; /* incoming interface address */ u_int32_t tr_outaddr; /* outgoing interface address */ u_int32_t tr_rmtaddr; /* parent address in source tree */ u_int32_t tr_vifin; /* input packet count on interface */ u_int32_t tr_vifout; /* output packet count on interface */ u_int32_t tr_pktcnt; /* total incoming packets for src-grp */ u_int8_t tr_rproto; /* routing proto deployed on router */ u_int8_t tr_fttl; /* ttl required to forward on outvif */ u_int8_t tr_smask; /* subnet mask for src addr */ u_int8_t tr_rflags; /* forwarding error codes */ }; /* defs within mtrace */ #define TR_QUERY 1 #define TR_RESP 2 /* fields for tr_rflags (forwarding error codes) */ #define TR_NO_ERR 0 #define TR_WRONG_IF 1 #define TR_PRUNED 2 #define TR_OPRUNED 3 #define TR_SCOPED 4 #define TR_NO_RTE 5 #define TR_NO_FWD 7 #define TR_NO_SPACE 0x81 #define TR_OLD_ROUTER 0x82 /* fields for tr_rproto (routing protocol) */ #define TR_PROTO_DVMRP 1 #define TR_PROTO_MOSPF 2 #define TR_PROTO_PIM 3 #define TR_PROTO_CBT 4 /* igmpv3 report types */ static struct tok igmpv3report2str[] = { { 1, "is_in" }, { 2, "is_ex" }, { 3, "to_in" }, { 4, "to_ex" }, { 5, "allow" }, { 6, "block" }, { 0, NULL } }; static void print_mtrace(register const u_char *bp, register u_int len) { register const struct tr_query *tr = (const struct tr_query *)(bp + 8); TCHECK(*tr); if (len < 8 + sizeof (struct tr_query)) { (void)printf(" [invalid len %d]", len); return; } printf("mtrace %u: %s to %s reply-to %s", TR_GETQID(EXTRACT_32BITS(&tr->tr_rttlqid)), ipaddr_string(&tr->tr_src), ipaddr_string(&tr->tr_dst), ipaddr_string(&tr->tr_raddr)); if (IN_CLASSD(EXTRACT_32BITS(&tr->tr_raddr))) printf(" with-ttl %d", TR_GETTTL(EXTRACT_32BITS(&tr->tr_rttlqid))); return; trunc: (void)printf("[|igmp]"); return; } static void print_mresp(register const u_char *bp, register u_int len) { register const struct tr_query *tr = (const struct tr_query *)(bp + 8); TCHECK(*tr); if (len < 8 + sizeof (struct tr_query)) { (void)printf(" [invalid len %d]", len); return; } printf("mresp %lu: %s to %s reply-to %s", (u_long)TR_GETQID(EXTRACT_32BITS(&tr->tr_rttlqid)), ipaddr_string(&tr->tr_src), ipaddr_string(&tr->tr_dst), ipaddr_string(&tr->tr_raddr)); if (IN_CLASSD(EXTRACT_32BITS(&tr->tr_raddr))) printf(" with-ttl %d", TR_GETTTL(EXTRACT_32BITS(&tr->tr_rttlqid))); return; trunc: (void)printf("[|igmp]"); return; } static void print_igmpv3_report(register const u_char *bp, register u_int len) { u_int group, nsrcs, ngroups; register u_int i, j; /* Minimum len is 16, and should be a multiple of 4 */ if (len < 16 || len & 0x03) { (void)printf(" [invalid len %d]", len); return; } TCHECK2(bp[6], 2); ngroups = EXTRACT_16BITS(&bp[6]); (void)printf(", %d group record(s)", ngroups); if (vflag > 0) { /* Print the group records */ group = 8; for (i=0; i> 4) + 3); } if (mrc != 100) { (void)printf(" [max resp time "); relts_print(mrt); (void)printf("]"); } TCHECK2(bp[4], 4); if (EXTRACT_32BITS(&bp[4]) == 0) return; (void)printf(" [gaddr %s", ipaddr_string(&bp[4])); TCHECK2(bp[10], 2); nsrcs = EXTRACT_16BITS(&bp[10]); if (nsrcs > 0) { if (len < 12 + (nsrcs << 2)) (void)printf(" [invalid number of sources]"); else if (vflag > 1) { (void)printf(" {"); for (i=0; i= 12) print_igmpv3_query(bp, len); else { TCHECK(bp[1]); if (bp[1]) { (void)printf(" v2"); if (bp[1] != 100) (void)printf(" [max resp time %d]", bp[1]); } else (void)printf(" v1"); TCHECK2(bp[4], 4); if (EXTRACT_32BITS(&bp[4])) (void)printf(" [gaddr %s]", ipaddr_string(&bp[4])); if (len != 8) (void)printf(" [len %d]", len); } break; case 0x12: TCHECK2(bp[4], 4); (void)printf("igmp v1 report %s", ipaddr_string(&bp[4])); if (len != 8) (void)printf(" [len %d]", len); break; case 0x16: TCHECK2(bp[4], 4); (void)printf("igmp v2 report %s", ipaddr_string(&bp[4])); break; case 0x22: (void)printf("igmp v3 report"); print_igmpv3_report(bp, len); break; case 0x17: (void)printf("igmp leave %s", ipaddr_string(&bp[4])); break; case 0x13: (void)printf("igmp dvmrp"); if (len < 8) (void)printf(" [len %d]", len); else dvmrp_print(bp, len); break; case 0x14: (void)printf("igmp pimv1"); pimv1_print(bp, len); break; case 0x1e: print_mresp(bp, len); break; case 0x1f: print_mtrace(bp, len); break; default: (void)printf("igmp-%d", bp[0]); break; } if (vflag && TTEST2(bp[0], len)) { /* Check the IGMP checksum */ if (in_cksum((const u_short*)bp, len, 0)) printf(" bad igmp cksum %x!", EXTRACT_16BITS(&bp[2])); } return; trunc: fputs("[|igmp]", stdout); }