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Fix the IGMP printer. A lost pair of parenthesis caused all IGMP

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reports to be printed as IGMPv1, and a misapplied patch caused
IGMP Leave messages to be partially interpreted as DVMRP routing
messages.
This commit is contained in:
Bill Fenner 1996-11-25 06:20:54 +00:00
parent c1abba55d6
commit f2e3e9a91e
1 changed files with 5 additions and 70 deletions
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75
contrib/tcpdump/print-ip.c
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@ -166,7 +166,7 @@ igmp_print(register const u_char *bp, register u_int len,
case 0x12:
case 0x16:
(void)printf("igmp %s report %s",
bp[0] & 0x0f == 6 ? "v2" : "v1",
(bp[0] & 0x0f) == 6 ? "v2" : "v1",
ipaddr_string(&bp[4]));
if (len != 8)
(void)printf(" [len %d]", len);
@ -175,75 +175,10 @@ igmp_print(register const u_char *bp, register u_int len,
break;
case 0x17:
(void)printf("igmp leave %s", ipaddr_string(&bp[4]));
switch(bp[1]) {
case 1:
(void)printf(" probe");
if (len < 8)
(void)printf(" [len %d]", len);
if (vflag) {
if (len > 8)
(void)printf(" genid 0x%08x",
ntohl(*(u_int32_t *)&bp[8]));
(void)printf(" [nf 0x%02x]", bp[5]);
}
if (len > 12) {
int i;
for (i = 12; i + 3 < len; i += 4)
(void)printf("\n\t%s",
ipaddr_string(&bp[i]));
}
break;
case 2:
(void)printf(" report");
if (vflag)
(void)printf(" [nf 0x%02x]", bp[5]);
if (len < 8)
(void)printf(" [len %d]", len);
break;
case 3:
case 5:
(void)printf(" %sneighbor query",
bp[1] == 5 ? "new " : "");
if (len < 8)
(void)printf(" [len %d]", len);
break;
case 4:
case 6:
(void)printf(" %sneighbor list",
bp[1] == 6 ? "new " : "");
if (len < 8)
(void)printf(" [len %d]", len);
break;
case 7:
(void)printf(" prune %s from ", ipaddr_string(&bp[12]));
(void)printf(" %s timer %d", ipaddr_string(&bp[8]),
ntohl(*(u_int32_t *)&bp[16]));
if (len != 20)
(void)printf(" [len %d]", len);
break;
case 8:
(void)printf(" graft %s from ", ipaddr_string(&bp[12]));
(void)printf(" %s", ipaddr_string(&bp[8]));
if (len != 16)
(void)printf(" [len %d]", len);
break;
case 9:
(void)printf(" graft ack %s from ",
ipaddr_string(&bp[12]));
(void)printf(" %s", ipaddr_string(&bp[8]));
if (len != 16)
(void)printf(" [len %d]", len);
break;
default:
(void)printf("-%d", bp[1]);
if (len != 8)
(void)printf(" [len %d]", len);
break;
}
if (bp[7] != 3 || (bp[7] == 3 && (bp[6] > 5 || bp[6] < 4)))
(void)printf(" [v%d.%d]", bp[7], bp[6]);
if (len != 8)
(void)printf(" [len %d]", len);
if (bp[1])
(void)printf(" [b1=0x%x]", bp[1]);
break;
case 0x13:
(void)printf("igmp dvmrp");