X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/ad6df73f5a6c46a409c7629f5588b1b81dff6357..2b4965f56167dfda7c60fc9db2d145698d948fd5:/print-igmp.c diff --git a/print-igmp.c b/print-igmp.c index d8403e90..a8485629 100644 --- a/print-igmp.c +++ b/print-igmp.c @@ -20,18 +20,15 @@ */ #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)"; +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 #ifdef HAVE_CONFIG_H #include "config.h" #endif -#include -#include - -#include +#include #include #include @@ -50,10 +47,10 @@ static const char rcsid[] = * 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 */ + 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) @@ -64,17 +61,17 @@ 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 */ + 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 */ @@ -109,33 +106,51 @@ static struct tok igmpv3report2str[] = { { 0, NULL } }; -static void +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); - printf("mtrace %lu: %s to %s reply-to %s", - (u_long)TR_GETQID(ntohl(tr->tr_rttlqid)), + 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(ntohl(tr->tr_raddr))) - printf(" with-ttl %d", TR_GETTTL(ntohl(tr->tr_rttlqid))); + 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 +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(ntohl(tr->tr_rttlqid)), + (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(ntohl(tr->tr_raddr))) - printf(" with-ttl %d", TR_GETTTL(ntohl(tr->tr_rttlqid))); + 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 +static void print_igmpv3_report(register const u_char *bp, register u_int len) { u_int group, nsrcs, ngroups; @@ -143,15 +158,15 @@ print_igmpv3_report(register const u_char *bp, register u_int len) /* Minimum len is 16, and should be a multiple of 4 */ if (len < 16 || len & 0x03) { - (void)printf(" [invalid len %d]", len); - return; + (void)printf(" [invalid len %d]", len); + return; } TCHECK2(bp[6], 2); ngroups = EXTRACT_16BITS(&bp[6]); - (void)printf(", %d group record(s)", ngroups); + (void)printf(", %d group record(s)", ngroups); if (vflag > 0) { /* Print the group records */ - group = 8; + group = 8; 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"); - if (EXTRACT_32BITS(&bp[4])) + 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: @@ -280,6 +300,7 @@ igmp_print(register const u_char *bp, register u_int len) print_igmpv3_report(bp, len); break; case 0x17: + TCHECK2(bp[4], 4); (void)printf("igmp leave %s", ipaddr_string(&bp[4])); break; case 0x13: