X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/aa7d6575c68e59abffff3327bcc389eb1987f99e..0f328b4aa16b0b47f05a85c440ce1d07719e3cac:/print-igmp.c diff --git a/print-igmp.c b/print-igmp.c index 4087ee09..082919e1 100644 --- a/print-igmp.c +++ b/print-igmp.c @@ -19,59 +19,61 @@ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ -#ifndef lint -static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/tcpdump/print-igmp.c,v 1.15 2004-03-24 00:59:16 guy Exp $ (LBL)"; -#endif +/* \summary: Internet Group Management Protocol (IGMP) printer */ + +/* + * specification: + * + * RFC 2236 for IGMPv2 + * RFC 3376 for IGMPv3 + * draft-asaeda-mboned-mtrace-v2 for the mtrace message + */ #ifdef HAVE_CONFIG_H #include "config.h" #endif -#include - -#include -#include +#include -#include "interface.h" +#include "netdissect.h" #include "addrtoname.h" -#include "extract.h" /* must come after interface.h */ +#include "extract.h" #ifndef IN_CLASSD #define IN_CLASSD(i) (((int32_t)(i) & 0xf0000000) == 0xe0000000) #endif +static const char tstr[] = "[|igmp]"; + /* (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 */ + nd_uint32_t tr_src; /* traceroute source */ + nd_uint32_t tr_dst; /* traceroute destination */ + nd_uint32_t tr_raddr; /* traceroute response address */ + nd_uint8_t tr_rttl; /* response ttl */ + nd_uint24_t tr_qid; /* 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 */ + uint32_t tr_qarr; /* query arrival time */ + uint32_t tr_inaddr; /* incoming interface address */ + uint32_t tr_outaddr; /* outgoing interface address */ + uint32_t tr_rmtaddr; /* parent address in source tree */ + uint32_t tr_vifin; /* input packet count on interface */ + uint32_t tr_vifout; /* output packet count on interface */ + uint32_t tr_pktcnt; /* total incoming packets for src-grp */ + uint8_t tr_rproto; /* routing proto deployed on router */ + uint8_t tr_fttl; /* ttl required to forward on outvif */ + uint8_t tr_smask; /* subnet mask for src addr */ + uint8_t tr_rflags; /* forwarding error codes */ }; /* defs within mtrace */ @@ -96,7 +98,7 @@ struct tr_resp { #define TR_PROTO_CBT 4 /* igmpv3 report types */ -static struct tok igmpv3report2str[] = { +static const struct tok igmpv3report2str[] = { { 1, "is_in" }, { 2, "is_ex" }, { 3, "to_in" }, @@ -107,238 +109,239 @@ static struct tok igmpv3report2str[] = { }; static void -print_mtrace(register const u_char *bp, register u_int len) +print_mtrace(netdissect_options *ndo, + register const u_char *bp, register u_int len) { register const struct tr_query *tr = (const struct tr_query *)(bp + 8); - TCHECK(*tr); + ND_TCHECK(*tr); if (len < 8 + sizeof (struct tr_query)) { - (void)printf(" [invalid len %d]", len); + ND_PRINT((ndo, " [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))); + ND_PRINT((ndo, "mtrace %u: %s to %s reply-to %s", + EXTRACT_BE_U_3(tr->tr_qid), + ipaddr_string(ndo, tr->tr_src), ipaddr_string(ndo, tr->tr_dst), + ipaddr_string(ndo, tr->tr_raddr))); + if (IN_CLASSD(EXTRACT_BE_U_4(tr->tr_raddr))) + ND_PRINT((ndo, " with-ttl %u", EXTRACT_U_1(tr->tr_rttl))); return; trunc: - (void)printf("[|igmp]"); - return; + ND_PRINT((ndo, "%s", tstr)); } static void -print_mresp(register const u_char *bp, register u_int len) +print_mresp(netdissect_options *ndo, + register const u_char *bp, register u_int len) { register const struct tr_query *tr = (const struct tr_query *)(bp + 8); - TCHECK(*tr); + ND_TCHECK(*tr); if (len < 8 + sizeof (struct tr_query)) { - (void)printf(" [invalid len %d]", len); + ND_PRINT((ndo, " [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))); + ND_PRINT((ndo, "mresp %u: %s to %s reply-to %s", + EXTRACT_BE_U_3(tr->tr_qid), + ipaddr_string(ndo, tr->tr_src), ipaddr_string(ndo, tr->tr_dst), + ipaddr_string(ndo, tr->tr_raddr))); + if (IN_CLASSD(EXTRACT_BE_U_4(tr->tr_raddr))) + ND_PRINT((ndo, " with-ttl %u", EXTRACT_U_1(tr->tr_rttl))); return; trunc: - (void)printf("[|igmp]"); - return; + ND_PRINT((ndo, "%s", tstr)); } static void -print_igmpv3_report(register const u_char *bp, register u_int len) +print_igmpv3_report(netdissect_options *ndo, + 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); + ND_PRINT((ndo, " [invalid len %d]", len)); return; } - TCHECK2(bp[6], 2); - ngroups = EXTRACT_16BITS(&bp[6]); - (void)printf(", %d group record(s)", ngroups); - if (vflag > 0) { + ND_TCHECK_2(bp + 6); + ngroups = EXTRACT_BE_U_2(bp + 6); + ND_PRINT((ndo, ", %d group record(s)", ngroups)); + if (ndo->ndo_vflag > 0) { /* Print the group records */ group = 8; for (i=0; indo_vflag == 1) + ND_PRINT((ndo, ", %d source(s)", nsrcs)); else { /* Print the sources */ - (void)printf(" {"); + ND_PRINT((ndo, " {")); for (j=0; j> 4) + 3); } if (mrc != 100) { - (void)printf(" [max resp time "); + ND_PRINT((ndo, " [max resp time ")); if (mrt < 600) { - (void)printf("%.1fs", mrt * 0.1); + ND_PRINT((ndo, "%.1fs", mrt * 0.1)); } else { - relts_print(mrt / 10); + unsigned_relts_print(ndo, mrt / 10); } - (void)printf("]"); + ND_PRINT((ndo, "]")); } - TCHECK2(bp[4], 4); - if (EXTRACT_32BITS(&bp[4]) == 0) + ND_TCHECK_4(bp + 4); + if (EXTRACT_BE_U_4(bp + 4) == 0) return; - (void)printf(" [gaddr %s", ipaddr_string(&bp[4])); - TCHECK2(bp[10], 2); - nsrcs = EXTRACT_16BITS(&bp[10]); + ND_PRINT((ndo, " [gaddr %s", ipaddr_string(ndo, bp + 4))); + ND_TCHECK_2(bp + 10); + nsrcs = EXTRACT_BE_U_2(bp + 10); if (nsrcs > 0) { if (len < 12 + (nsrcs << 2)) - (void)printf(" [invalid number of sources]"); - else if (vflag > 1) { - (void)printf(" {"); + ND_PRINT((ndo, " [invalid number of sources]")); + else if (ndo->ndo_vflag > 1) { + ND_PRINT((ndo, " {")); for (i=0; indo_qflag) { + ND_PRINT((ndo, "igmp")); return; } - TCHECK(bp[0]); - switch (bp[0]) { + ND_TCHECK_1(bp); + switch (EXTRACT_U_1(bp)) { case 0x11: - (void)printf("igmp query"); + ND_PRINT((ndo, "igmp query")); if (len >= 12) - print_igmpv3_query(bp, len); + print_igmpv3_query(ndo, bp, len); else { - TCHECK(bp[1]); - if (bp[1]) { - (void)printf(" v2"); - if (bp[1] != 100) - (void)printf(" [max resp time %d]", bp[1]); + ND_TCHECK_1(bp + 1); + if (EXTRACT_U_1(bp + 1)) { + ND_PRINT((ndo, " v2")); + if (EXTRACT_U_1(bp + 1) != 100) + ND_PRINT((ndo, " [max resp time %u]", EXTRACT_U_1(bp + 1))); } else - (void)printf(" v1"); - TCHECK2(bp[4], 4); - if (EXTRACT_32BITS(&bp[4])) - (void)printf(" [gaddr %s]", ipaddr_string(&bp[4])); + ND_PRINT((ndo, " v1")); + ND_TCHECK_4(bp + 4); + if (EXTRACT_BE_U_4(bp + 4)) + ND_PRINT((ndo, " [gaddr %s]", ipaddr_string(ndo, bp + 4))); if (len != 8) - (void)printf(" [len %d]", len); + ND_PRINT((ndo, " [len %d]", len)); } break; case 0x12: - TCHECK2(bp[4], 4); - (void)printf("igmp v1 report %s", ipaddr_string(&bp[4])); + ND_TCHECK_4(bp + 4); + ND_PRINT((ndo, "igmp v1 report %s", ipaddr_string(ndo, bp + 4))); if (len != 8) - (void)printf(" [len %d]", len); + ND_PRINT((ndo, " [len %d]", len)); break; case 0x16: - TCHECK2(bp[4], 4); - (void)printf("igmp v2 report %s", ipaddr_string(&bp[4])); + ND_TCHECK_4(bp + 4); + ND_PRINT((ndo, "igmp v2 report %s", ipaddr_string(ndo, bp + 4))); break; case 0x22: - (void)printf("igmp v3 report"); - print_igmpv3_report(bp, len); + ND_PRINT((ndo, "igmp v3 report")); + print_igmpv3_report(ndo, bp, len); break; case 0x17: - TCHECK2(bp[4], 4); - (void)printf("igmp leave %s", ipaddr_string(&bp[4])); + ND_TCHECK_4(bp + 4); + ND_PRINT((ndo, "igmp leave %s", ipaddr_string(ndo, bp + 4))); break; case 0x13: - (void)printf("igmp dvmrp"); + ND_PRINT((ndo, "igmp dvmrp")); if (len < 8) - (void)printf(" [len %d]", len); + ND_PRINT((ndo, " [len %d]", len)); else - dvmrp_print(bp, len); + dvmrp_print(ndo, bp, len); break; case 0x14: - (void)printf("igmp pimv1"); - pimv1_print(bp, len); + ND_PRINT((ndo, "igmp pimv1")); + pimv1_print(ndo, bp, len); break; case 0x1e: - print_mresp(bp, len); + print_mresp(ndo, bp, len); break; case 0x1f: - print_mtrace(bp, len); + print_mtrace(ndo, bp, len); break; default: - (void)printf("igmp-%d", bp[0]); + ND_PRINT((ndo, "igmp-%d", EXTRACT_U_1(bp))); break; } - if (vflag && TTEST2(bp[0], len)) { + if (ndo->ndo_vflag && len >= 4 && ND_TTEST2(bp[0], len)) { /* Check the IGMP checksum */ vec[0].ptr = bp; vec[0].len = len; if (in_cksum(vec, 1)) - printf(" bad igmp cksum %x!", EXTRACT_16BITS(&bp[2])); + ND_PRINT((ndo, " bad igmp cksum %x!", EXTRACT_BE_U_2(bp + 2))); } return; trunc: - fputs("[|igmp]", stdout); + ND_PRINT((ndo, "%s", tstr)); }