* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-igmp.c,v 1.2 2000-11-02 18:02:52 fenner 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"
+#include <config.h>
#endif
-#include <sys/param.h>
-#include <sys/socket.h>
-
-#include <netinet/in.h>
-#include <netinet/in_systm.h>
-#include <netinet/ip.h>
+#include "netdissect-stdinc.h"
-#include <stdio.h>
-#include <string.h>
-
-#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
+
/* (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 */
+ 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_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 */
+ nd_uint32_t tr_qarr; /* query arrival time */
+ nd_uint32_t tr_inaddr; /* incoming interface address */
+ nd_uint32_t tr_outaddr; /* outgoing interface address */
+ nd_uint32_t tr_rmtaddr; /* parent address in source tree */
+ nd_uint32_t tr_vifin; /* input packet count on interface */
+ nd_uint32_t tr_vifout; /* output packet count on interface */
+ nd_uint32_t tr_pktcnt; /* total incoming packets for src-grp */
+ nd_uint8_t tr_rproto; /* routing proto deployed on router */
+ nd_uint8_t tr_fttl; /* ttl required to forward on outvif */
+ nd_uint8_t tr_smask; /* subnet mask for src addr */
+ nd_uint8_t tr_rflags; /* forwarding error codes */
};
/* defs within mtrace */
#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" },
{ 0, NULL }
};
-static void
-print_mtrace(register const u_char *bp, register u_int len)
-{
- register struct tr_query *tr = (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)));
-}
-
-static void
-print_mresp(register const u_char *bp, register u_int len)
+static void
+print_mtrace(netdissect_options *ndo,
+ const char *typename,
+ const u_char *bp, u_int len)
{
- register struct tr_query *tr = (struct tr_query *)(bp + 8);
+ 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)));
+ if (len < 8 + sizeof (struct tr_query)) {
+ ND_PRINT(" [invalid len %u]", len);
+ return;
+ }
+ ND_PRINT("%s %u: %s to %s reply-to %s",
+ typename,
+ GET_BE_U_3(tr->tr_qid),
+ GET_IPADDR_STRING(tr->tr_src), GET_IPADDR_STRING(tr->tr_dst),
+ GET_IPADDR_STRING(tr->tr_raddr));
+ if (IN_CLASSD(GET_BE_U_4(tr->tr_raddr)))
+ ND_PRINT(" with-ttl %u", GET_U_1(tr->tr_rttl));
}
-static void
-print_igmpv3_report(register const u_char *bp, register u_int len,
- register const u_char *bp2)
+static void
+print_igmpv3_report(netdissect_options *ndo,
+ const u_char *bp, u_int len)
{
- int group, nsrcs, ngroups;
- register int i, j;
+ u_int group, nsrcs, ngroups;
+ 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(" [invalid len %u]", len);
+ return;
}
- TCHECK2(bp[6], 2);
- ngroups = EXTRACT_16BITS(&bp[6]);
- (void)printf(", %d group record(s)", ngroups);
- if (vflag > 0) {
+ ngroups = GET_BE_U_2(bp + 6);
+ ND_PRINT(", %u group record(s)", ngroups);
+ if (ndo->ndo_vflag > 0) {
/* Print the group records */
- group = 8;
+ group = 8;
for (i=0; i<ngroups; i++) {
if (len < group+8) {
- (void)printf(" [invalid number of groups]");
+ ND_PRINT(" [invalid number of groups]");
return;
}
- TCHECK2(bp[group+4], 4);
- (void)printf(" [gaddr %s", ipaddr_string(&bp[group+4]));
- (void)printf(" %s", tok2str(igmpv3report2str, " [v3-report-#%d]",
- bp[group]));
- nsrcs = EXTRACT_16BITS(&bp[group+2]);
+ ND_PRINT(" [gaddr %s", GET_IPADDR_STRING(bp + group + 4));
+ ND_PRINT(" %s", tok2str(igmpv3report2str, " [v3-report-#%u]",
+ GET_U_1(bp + group)));
+ nsrcs = GET_BE_U_2(bp + group + 2);
/* Check the number of sources and print them */
if (len < group+8+(nsrcs<<2)) {
- (void)printf(" [invalid number of sources %d]", nsrcs);
+ ND_PRINT(" [invalid number of sources %u]", nsrcs);
return;
}
- if (vflag == 1)
- (void)printf(", %d source(s)", nsrcs);
+ if (ndo->ndo_vflag == 1)
+ ND_PRINT(", %u source(s)", nsrcs);
else {
/* Print the sources */
- (void)printf(" {");
+ ND_PRINT(" {");
for (j=0; j<nsrcs; j++) {
- TCHECK2(bp[group+8+(j<<2)], 4);
- (void)printf(" %s", ipaddr_string(&bp[group+8+(j<<2)]));
+ ND_PRINT(" %s", GET_IPADDR_STRING(bp + group + 8 + (j << 2)));
}
- (void)printf(" }");
+ ND_PRINT(" }");
}
/* Next group record */
group += 8 + (nsrcs << 2);
- (void)printf("]");
+ ND_PRINT("]");
}
}
- return;
-trunc:
- (void)printf("[|igmp]");
- return;
}
static void
-print_igmpv3_query(register const u_char *bp, register u_int len,
- register const u_char *bp2)
+print_igmpv3_query(netdissect_options *ndo,
+ const u_char *bp, u_int len)
{
- int nsrcs;
- register int i;
+ u_int mrc;
+ u_int mrt;
+ u_int nsrcs;
+ u_int i;
- (void)printf(" v3");
+ ND_PRINT(" v3");
/* Minimum len is 12, and should be a multiple of 4 */
if (len < 12 || len & 0x03) {
- (void)printf(" [invalid len %d]", len);
- return;
+ ND_PRINT(" [invalid len %u]", len);
+ return;
+ }
+ mrc = GET_U_1(bp + 1);
+ if (mrc < 128) {
+ mrt = mrc;
+ } else {
+ mrt = ((mrc & 0x0f) | 0x10) << (((mrc & 0x70) >> 4) + 3);
}
- TCHECK2(bp[4], 4);
- if (EXTRACT_32BITS(&bp[4]) == 0)
+ if (mrc != 100) {
+ ND_PRINT(" [max resp time ");
+ if (mrt < 600) {
+ ND_PRINT("%.1fs", mrt * 0.1);
+ } else {
+ unsigned_relts_print(ndo, mrt / 10);
+ }
+ ND_PRINT("]");
+ }
+ if (GET_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(" [gaddr %s", GET_IPADDR_STRING(bp + 4));
+ nsrcs = GET_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(" [invalid number of sources]");
+ else if (ndo->ndo_vflag > 1) {
+ ND_PRINT(" {");
for (i=0; i<nsrcs; i++) {
- TCHECK2(bp[12+(i<<2)], 4);
- (void)printf(" %s", ipaddr_string(&bp[12+(i<<2)]));
+ ND_PRINT(" %s", GET_IPADDR_STRING(bp + 12 + (i << 2)));
}
- (void)printf(" }");
+ ND_PRINT(" }");
} else
- (void)printf(", %d source(s)", nsrcs);
+ ND_PRINT(", %u source(s)", nsrcs);
}
- (void)printf("]");
- return;
-trunc:
- (void)printf("[|igmp]");
- return;
+ ND_PRINT("]");
}
void
-igmp_print(register const u_char *bp, register u_int len,
- register const u_char *bp2)
+igmp_print(netdissect_options *ndo,
+ const u_char *bp, u_int len)
{
- register const struct ip *ip;
-
- ip = (const struct ip *)bp2;
- (void)printf("%s > %s: ",
- ipaddr_string(&ip->ip_src),
- ipaddr_string(&ip->ip_dst));
+ struct cksum_vec vec[1];
- if (qflag) {
- (void)printf("igmp");
+ ndo->ndo_protocol = "igmp";
+ if (ndo->ndo_qflag) {
+ ND_PRINT("igmp");
return;
}
- TCHECK2(bp[0], 8);
- switch (bp[0]) {
+ switch (GET_U_1(bp)) {
case 0x11:
- (void)printf("igmp query");
+ ND_PRINT("igmp query");
if (len >= 12)
- print_igmpv3_query(bp, len, bp2);
+ print_igmpv3_query(ndo, bp, len);
else {
- if (bp[1]) {
- (void)printf(" v2");
- if (bp[1] != 100)
- (void)printf(" [max resp time %d]", bp[1]);
+ if (GET_U_1(bp + 1)) {
+ ND_PRINT(" v2");
+ if (GET_U_1(bp + 1) != 100)
+ ND_PRINT(" [max resp time %u]", GET_U_1(bp + 1));
} else
- (void)printf(" v1");
- if (EXTRACT_32BITS(&bp[4]))
- (void)printf(" [gaddr %s]", ipaddr_string(&bp[4]));
+ ND_PRINT(" v1");
+ if (GET_BE_U_4(bp + 4))
+ ND_PRINT(" [gaddr %s]", GET_IPADDR_STRING(bp + 4));
if (len != 8)
- (void)printf(" [len %d]", len);
+ ND_PRINT(" [len %u]", len);
}
break;
case 0x12:
- (void)printf("igmp v1 report %s", ipaddr_string(&bp[4]));
+ ND_PRINT("igmp v1 report %s", GET_IPADDR_STRING(bp + 4));
if (len != 8)
- (void)printf(" [len %d]", len);
+ ND_PRINT(" [len %u]", len);
break;
case 0x16:
- (void)printf("igmp v2 report %s", ipaddr_string(&bp[4]));
+ ND_PRINT("igmp v2 report %s", GET_IPADDR_STRING(bp + 4));
break;
case 0x22:
- (void)printf("igmp v3 report");
- print_igmpv3_report(bp, len, bp2);
+ ND_PRINT("igmp v3 report");
+ print_igmpv3_report(ndo, bp, len);
break;
case 0x17:
- (void)printf("igmp leave %s", ipaddr_string(&bp[4]));
+ ND_PRINT("igmp leave %s", GET_IPADDR_STRING(bp + 4));
break;
case 0x13:
- (void)printf("igmp dvmrp");
+ ND_PRINT("igmp dvmrp");
if (len < 8)
- (void)printf(" [len %d]", len);
+ ND_PRINT(" [len %u]", len);
else
- dvmrp_print(bp, len);
+ dvmrp_print(ndo, bp, len);
break;
case 0x14:
- (void)printf("igmp pimv1");
- pimv1_print(bp, len);
+ ND_PRINT("igmp pimv1");
+ pimv1_print(ndo, bp, len);
break;
case 0x1e:
- print_mresp(bp, len);
+ print_mtrace(ndo, "mresp", bp, len);
break;
case 0x1f:
- print_mtrace(bp, len);
+ print_mtrace(ndo, "mtrace", bp, len);
break;
default:
- (void)printf("igmp-%d", bp[0]);
+ ND_PRINT("igmp-%u", GET_U_1(bp));
break;
}
- if (vflag && TTEST2(bp[0], len)) {
+ if (ndo->ndo_vflag && len >= 4 && ND_TTEST_LEN(bp, 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(" bad igmp cksum %x!", GET_BE_U_2(bp + 2));
}
- return;
-trunc:
- fputs("[|igmp]", stdout);
}
projects / tcpdump / blobdiff