b636d99d91
For now, printing of Sun RPC requests is disabled because we do not yet have the RPC header files. This should affect basically noone, as we do not have any RPC-based programs yet, for the same reason. Change-Id: Ie7818faaaacdc104d8b2c37a68866b4ce18247d6
346 lines
10 KiB
C
346 lines
10 KiB
C
/*
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* Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994, 1995, 1996
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: print-igmp.c,v 1.5 2014/11/20 03:05:03 christos Exp $");
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#endif
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#define NETDISSECT_REWORKED
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <tcpdump-stdinc.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "extract.h" /* must come after interface.h */
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#ifndef IN_CLASSD
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#define IN_CLASSD(i) (((int32_t)(i) & 0xf0000000) == 0xe0000000)
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#endif
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static const char tstr[] = "[|igmp]";
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/* (following from ipmulti/mrouted/prune.h) */
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/*
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* The packet format for a traceroute request.
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*/
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struct tr_query {
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uint32_t tr_src; /* traceroute source */
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uint32_t tr_dst; /* traceroute destination */
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uint32_t tr_raddr; /* traceroute response address */
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uint32_t tr_rttlqid; /* response ttl and qid */
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};
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#define TR_GETTTL(x) (int)(((x) >> 24) & 0xff)
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#define TR_GETQID(x) ((x) & 0x00ffffff)
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/*
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* Traceroute response format. A traceroute response has a tr_query at the
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* beginning, followed by one tr_resp for each hop taken.
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*/
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struct tr_resp {
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uint32_t tr_qarr; /* query arrival time */
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uint32_t tr_inaddr; /* incoming interface address */
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uint32_t tr_outaddr; /* outgoing interface address */
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uint32_t tr_rmtaddr; /* parent address in source tree */
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uint32_t tr_vifin; /* input packet count on interface */
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uint32_t tr_vifout; /* output packet count on interface */
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uint32_t tr_pktcnt; /* total incoming packets for src-grp */
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uint8_t tr_rproto; /* routing proto deployed on router */
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uint8_t tr_fttl; /* ttl required to forward on outvif */
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uint8_t tr_smask; /* subnet mask for src addr */
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uint8_t tr_rflags; /* forwarding error codes */
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};
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/* defs within mtrace */
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#define TR_QUERY 1
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#define TR_RESP 2
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/* fields for tr_rflags (forwarding error codes) */
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#define TR_NO_ERR 0
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#define TR_WRONG_IF 1
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#define TR_PRUNED 2
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#define TR_OPRUNED 3
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#define TR_SCOPED 4
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#define TR_NO_RTE 5
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#define TR_NO_FWD 7
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#define TR_NO_SPACE 0x81
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#define TR_OLD_ROUTER 0x82
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/* fields for tr_rproto (routing protocol) */
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#define TR_PROTO_DVMRP 1
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#define TR_PROTO_MOSPF 2
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#define TR_PROTO_PIM 3
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#define TR_PROTO_CBT 4
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/* igmpv3 report types */
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static const struct tok igmpv3report2str[] = {
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{ 1, "is_in" },
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{ 2, "is_ex" },
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{ 3, "to_in" },
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{ 4, "to_ex" },
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{ 5, "allow" },
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{ 6, "block" },
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{ 0, NULL }
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};
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static void
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print_mtrace(netdissect_options *ndo,
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register const u_char *bp, register u_int len)
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{
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register const struct tr_query *tr = (const struct tr_query *)(bp + 8);
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ND_TCHECK(*tr);
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if (len < 8 + sizeof (struct tr_query)) {
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ND_PRINT((ndo, " [invalid len %d]", len));
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return;
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}
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ND_PRINT((ndo, "mtrace %u: %s to %s reply-to %s",
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TR_GETQID(EXTRACT_32BITS(&tr->tr_rttlqid)),
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ipaddr_string(ndo, &tr->tr_src), ipaddr_string(ndo, &tr->tr_dst),
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ipaddr_string(ndo, &tr->tr_raddr)));
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if (IN_CLASSD(EXTRACT_32BITS(&tr->tr_raddr)))
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ND_PRINT((ndo, " with-ttl %d", TR_GETTTL(EXTRACT_32BITS(&tr->tr_rttlqid))));
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return;
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trunc:
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ND_PRINT((ndo, "%s", tstr));
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}
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static void
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print_mresp(netdissect_options *ndo,
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register const u_char *bp, register u_int len)
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{
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register const struct tr_query *tr = (const struct tr_query *)(bp + 8);
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ND_TCHECK(*tr);
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if (len < 8 + sizeof (struct tr_query)) {
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ND_PRINT((ndo, " [invalid len %d]", len));
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return;
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}
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ND_PRINT((ndo, "mresp %lu: %s to %s reply-to %s",
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(u_long)TR_GETQID(EXTRACT_32BITS(&tr->tr_rttlqid)),
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ipaddr_string(ndo, &tr->tr_src), ipaddr_string(ndo, &tr->tr_dst),
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ipaddr_string(ndo, &tr->tr_raddr)));
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if (IN_CLASSD(EXTRACT_32BITS(&tr->tr_raddr)))
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ND_PRINT((ndo, " with-ttl %d", TR_GETTTL(EXTRACT_32BITS(&tr->tr_rttlqid))));
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return;
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trunc:
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ND_PRINT((ndo, "%s", tstr));
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}
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static void
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print_igmpv3_report(netdissect_options *ndo,
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register const u_char *bp, register u_int len)
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{
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u_int group, nsrcs, ngroups;
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register u_int i, j;
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/* Minimum len is 16, and should be a multiple of 4 */
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if (len < 16 || len & 0x03) {
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ND_PRINT((ndo, " [invalid len %d]", len));
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return;
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}
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ND_TCHECK2(bp[6], 2);
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ngroups = EXTRACT_16BITS(&bp[6]);
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ND_PRINT((ndo, ", %d group record(s)", ngroups));
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if (ndo->ndo_vflag > 0) {
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/* Print the group records */
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group = 8;
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for (i=0; i<ngroups; i++) {
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if (len < group+8) {
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ND_PRINT((ndo, " [invalid number of groups]"));
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return;
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}
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ND_TCHECK2(bp[group+4], 4);
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ND_PRINT((ndo, " [gaddr %s", ipaddr_string(ndo, &bp[group+4])));
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ND_PRINT((ndo, " %s", tok2str(igmpv3report2str, " [v3-report-#%d]",
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bp[group])));
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nsrcs = EXTRACT_16BITS(&bp[group+2]);
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/* Check the number of sources and print them */
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if (len < group+8+(nsrcs<<2)) {
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ND_PRINT((ndo, " [invalid number of sources %d]", nsrcs));
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return;
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}
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if (ndo->ndo_vflag == 1)
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ND_PRINT((ndo, ", %d source(s)", nsrcs));
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else {
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/* Print the sources */
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ND_PRINT((ndo, " {"));
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for (j=0; j<nsrcs; j++) {
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ND_TCHECK2(bp[group+8+(j<<2)], 4);
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ND_PRINT((ndo, " %s", ipaddr_string(ndo, &bp[group+8+(j<<2)])));
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}
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ND_PRINT((ndo, " }"));
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}
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/* Next group record */
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group += 8 + (nsrcs << 2);
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ND_PRINT((ndo, "]"));
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}
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}
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return;
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trunc:
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ND_PRINT((ndo, "%s", tstr));
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}
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static void
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print_igmpv3_query(netdissect_options *ndo,
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register const u_char *bp, register u_int len)
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{
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u_int mrc;
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int mrt;
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u_int nsrcs;
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register u_int i;
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ND_PRINT((ndo, " v3"));
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/* Minimum len is 12, and should be a multiple of 4 */
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if (len < 12 || len & 0x03) {
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ND_PRINT((ndo, " [invalid len %d]", len));
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return;
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}
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ND_TCHECK(bp[1]);
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mrc = bp[1];
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if (mrc < 128) {
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mrt = mrc;
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} else {
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mrt = ((mrc & 0x0f) | 0x10) << (((mrc & 0x70) >> 4) + 3);
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}
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if (mrc != 100) {
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ND_PRINT((ndo, " [max resp time "));
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if (mrt < 600) {
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ND_PRINT((ndo, "%.1fs", mrt * 0.1));
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} else {
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relts_print(ndo, mrt / 10);
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}
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ND_PRINT((ndo, "]"));
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}
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ND_TCHECK2(bp[4], 4);
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if (EXTRACT_32BITS(&bp[4]) == 0)
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return;
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ND_PRINT((ndo, " [gaddr %s", ipaddr_string(ndo, &bp[4])));
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ND_TCHECK2(bp[10], 2);
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nsrcs = EXTRACT_16BITS(&bp[10]);
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if (nsrcs > 0) {
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if (len < 12 + (nsrcs << 2))
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ND_PRINT((ndo, " [invalid number of sources]"));
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else if (ndo->ndo_vflag > 1) {
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ND_PRINT((ndo, " {"));
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for (i=0; i<nsrcs; i++) {
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ND_TCHECK2(bp[12+(i<<2)], 4);
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ND_PRINT((ndo, " %s", ipaddr_string(ndo, &bp[12+(i<<2)])));
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}
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ND_PRINT((ndo, " }"));
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} else
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ND_PRINT((ndo, ", %d source(s)", nsrcs));
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}
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ND_PRINT((ndo, "]"));
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return;
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trunc:
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ND_PRINT((ndo, "%s", tstr));
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}
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void
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igmp_print(netdissect_options *ndo,
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register const u_char *bp, register u_int len)
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{
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struct cksum_vec vec[1];
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if (ndo->ndo_qflag) {
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ND_PRINT((ndo, "igmp"));
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return;
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}
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ND_TCHECK(bp[0]);
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switch (bp[0]) {
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case 0x11:
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ND_PRINT((ndo, "igmp query"));
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if (len >= 12)
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print_igmpv3_query(ndo, bp, len);
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else {
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ND_TCHECK(bp[1]);
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if (bp[1]) {
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ND_PRINT((ndo, " v2"));
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if (bp[1] != 100)
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ND_PRINT((ndo, " [max resp time %d]", bp[1]));
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} else
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ND_PRINT((ndo, " v1"));
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ND_TCHECK2(bp[4], 4);
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if (EXTRACT_32BITS(&bp[4]))
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ND_PRINT((ndo, " [gaddr %s]", ipaddr_string(ndo, &bp[4])));
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if (len != 8)
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ND_PRINT((ndo, " [len %d]", len));
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}
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break;
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case 0x12:
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ND_TCHECK2(bp[4], 4);
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ND_PRINT((ndo, "igmp v1 report %s", ipaddr_string(ndo, &bp[4])));
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if (len != 8)
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ND_PRINT((ndo, " [len %d]", len));
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break;
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case 0x16:
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ND_TCHECK2(bp[4], 4);
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ND_PRINT((ndo, "igmp v2 report %s", ipaddr_string(ndo, &bp[4])));
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break;
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case 0x22:
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ND_PRINT((ndo, "igmp v3 report"));
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print_igmpv3_report(ndo, bp, len);
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break;
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case 0x17:
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ND_TCHECK2(bp[4], 4);
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ND_PRINT((ndo, "igmp leave %s", ipaddr_string(ndo, &bp[4])));
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break;
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case 0x13:
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ND_PRINT((ndo, "igmp dvmrp"));
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if (len < 8)
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ND_PRINT((ndo, " [len %d]", len));
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else
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dvmrp_print(ndo, bp, len);
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break;
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case 0x14:
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ND_PRINT((ndo, "igmp pimv1"));
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pimv1_print(ndo, bp, len);
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break;
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case 0x1e:
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print_mresp(ndo, bp, len);
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break;
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case 0x1f:
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print_mtrace(ndo, bp, len);
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break;
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default:
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ND_PRINT((ndo, "igmp-%d", bp[0]));
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break;
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}
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if (ndo->ndo_vflag && ND_TTEST2(bp[0], len)) {
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/* Check the IGMP checksum */
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vec[0].ptr = bp;
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vec[0].len = len;
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if (in_cksum(vec, 1))
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ND_PRINT((ndo, " bad igmp cksum %x!", EXTRACT_16BITS(&bp[2])));
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}
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return;
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trunc:
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ND_PRINT((ndo, "%s", tstr));
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}
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