X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/ad6df73f5a6c46a409c7629f5588b1b81dff6357..d6aacc676d8540f31d1df72b12b43fc9cde93df6:/print-igmp.c diff --git a/print-igmp.c b/print-igmp.c index d8403e90..4b8e82dc 100644 --- a/print-igmp.c +++ b/print-igmp.c @@ -19,41 +19,32 @@ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ -#ifndef lint -static const char rcsid[] = - "@(#) $Header: /tcpdump/master/tcpdump/print-igmp.c,v 1.6 2002-06-02 18:24:41 guy Exp $ (LBL)"; -#endif - #ifdef HAVE_CONFIG_H #include "config.h" #endif -#include -#include - -#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_int tr_src; /* traceroute source */ - u_int tr_dst; /* traceroute destination */ - u_int tr_raddr; /* traceroute response address */ - u_int tr_rttlqid; /* response ttl and qid */ + uint32_t tr_src; /* traceroute source */ + uint32_t tr_dst; /* traceroute destination */ + uint32_t tr_raddr; /* traceroute response address */ + uint32_t tr_rttlqid; /* response ttl and qid */ }; #define TR_GETTTL(x) (int)(((x) >> 24) & 0xff) @@ -64,17 +55,17 @@ struct tr_query { * beginning, followed by one tr_resp for each hop taken. */ struct tr_resp { - u_int tr_qarr; /* query arrival time */ - u_int tr_inaddr; /* incoming interface address */ - u_int tr_outaddr; /* outgoing interface address */ - u_int tr_rmtaddr; /* parent address in source tree */ - u_int tr_vifin; /* input packet count on interface */ - u_int tr_vifout; /* output packet count on interface */ - u_int tr_pktcnt; /* total incoming packets for src-grp */ - u_char tr_rproto; /* routing proto deployed on router */ - u_char tr_fttl; /* ttl required to forward on outvif */ - u_char tr_smask; /* subnet mask for src addr */ - u_char 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 */ @@ -99,7 +90,7 @@ 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" }, @@ -109,100 +100,120 @@ static struct tok igmpv3report2str[] = { { 0, NULL } }; -static void -print_mtrace(register const u_char *bp, register u_int len) +static void +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); - printf("mtrace %lu: %s to %s reply-to %s", - (u_long)TR_GETQID(ntohl(tr->tr_rttlqid)), - ipaddr_string(&tr->tr_src), ipaddr_string(&tr->tr_dst), - ipaddr_string(&tr->tr_raddr)); - if (IN_CLASSD(ntohl(tr->tr_raddr))) - printf(" with-ttl %d", TR_GETTTL(ntohl(tr->tr_rttlqid))); + ND_TCHECK(*tr); + if (len < 8 + sizeof (struct tr_query)) { + ND_PRINT((ndo, " [invalid len %d]", len)); + return; + } + ND_PRINT((ndo, "mtrace %u: %s to %s reply-to %s", + TR_GETQID(EXTRACT_32BITS(&tr->tr_rttlqid)), + ipaddr_string(ndo, &tr->tr_src), ipaddr_string(ndo, &tr->tr_dst), + ipaddr_string(ndo, &tr->tr_raddr))); + if (IN_CLASSD(EXTRACT_32BITS(&tr->tr_raddr))) + ND_PRINT((ndo, " with-ttl %d", TR_GETTTL(EXTRACT_32BITS(&tr->tr_rttlqid)))); + return; +trunc: + ND_PRINT((ndo, "%s", tstr)); } -static void -print_mresp(register const u_char *bp, register u_int len) +static void +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); - printf("mresp %lu: %s to %s reply-to %s", - (u_long)TR_GETQID(ntohl(tr->tr_rttlqid)), - ipaddr_string(&tr->tr_src), ipaddr_string(&tr->tr_dst), - ipaddr_string(&tr->tr_raddr)); - if (IN_CLASSD(ntohl(tr->tr_raddr))) - printf(" with-ttl %d", TR_GETTTL(ntohl(tr->tr_rttlqid))); + ND_TCHECK(*tr); + if (len < 8 + sizeof (struct tr_query)) { + ND_PRINT((ndo, " [invalid len %d]", len)); + return; + } + ND_PRINT((ndo, "mresp %lu: %s to %s reply-to %s", + (u_long)TR_GETQID(EXTRACT_32BITS(&tr->tr_rttlqid)), + ipaddr_string(ndo, &tr->tr_src), ipaddr_string(ndo, &tr->tr_dst), + ipaddr_string(ndo, &tr->tr_raddr))); + if (IN_CLASSD(EXTRACT_32BITS(&tr->tr_raddr))) + ND_PRINT((ndo, " with-ttl %d", TR_GETTTL(EXTRACT_32BITS(&tr->tr_rttlqid)))); + return; +trunc: + ND_PRINT((ndo, "%s", tstr)); } -static void -print_igmpv3_report(register const u_char *bp, register u_int len) +static void +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); - return; + ND_PRINT((ndo, " [invalid len %d]", len)); + return; } - TCHECK2(bp[6], 2); + ND_TCHECK2(bp[6], 2); ngroups = EXTRACT_16BITS(&bp[6]); - (void)printf(", %d group record(s)", ngroups); - if (vflag > 0) { + ND_PRINT((ndo, ", %d group record(s)", ngroups)); + if (ndo->ndo_vflag > 0) { /* Print the group records */ - group = 8; + 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 "); - relts_print(mrt); - (void)printf("]"); + ND_PRINT((ndo, " [max resp time ")); + if (mrt < 600) { + ND_PRINT((ndo, "%.1fs", mrt * 0.1)); + } else { + relts_print(ndo, mrt / 10); + } + ND_PRINT((ndo, "]")); } - TCHECK2(bp[4], 4); + ND_TCHECK2(bp[4], 4); if (EXTRACT_32BITS(&bp[4]) == 0) return; - (void)printf(" [gaddr %s", ipaddr_string(&bp[4])); - TCHECK2(bp[10], 2); + ND_PRINT((ndo, " [gaddr %s", ipaddr_string(ndo, &bp[4]))); + ND_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(" {"); + 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; } - TCHECK2(bp[0], 8); + ND_TCHECK(bp[0]); switch (bp[0]) { 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 { + ND_TCHECK(bp[1]); if (bp[1]) { - (void)printf(" v2"); + ND_PRINT((ndo, " v2")); if (bp[1] != 100) - (void)printf(" [max resp time %d]", bp[1]); + ND_PRINT((ndo, " [max resp time %d]", bp[1])); } else - (void)printf(" v1"); - if (EXTRACT_32BITS(&bp[4])) - (void)printf(" [gaddr %s]", ipaddr_string(&bp[4])); + ND_PRINT((ndo, " v1")); + ND_TCHECK2(bp[4], 4); + if (EXTRACT_32BITS(&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: - (void)printf("igmp v1 report %s", ipaddr_string(&bp[4])); + ND_TCHECK2(bp[4], 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: - (void)printf("igmp v2 report %s", ipaddr_string(&bp[4])); + ND_TCHECK2(bp[4], 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: - (void)printf("igmp leave %s", ipaddr_string(&bp[4])); + ND_TCHECK2(bp[4], 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", bp[0])); break; } - if (vflag && TTEST2(bp[0], len)) { + if (ndo->ndo_vflag && ND_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])); + vec[0].ptr = bp; + vec[0].len = len; + if (in_cksum(vec, 1)) + ND_PRINT((ndo, " bad igmp cksum %x!", EXTRACT_16BITS(&bp[2]))); } return; trunc: - fputs("[|igmp]", stdout); + ND_PRINT((ndo, "%s", tstr)); }