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print-ip.c (56896) print-ip.c (75118)
1/*
2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and

--- 4 unchanged lines hidden (view full) ---

13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 *
1/*
2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and

--- 4 unchanged lines hidden (view full) ---

13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 *
21 * $FreeBSD: head/contrib/tcpdump/print-ip.c 56896 2000-01-30 01:05:24Z fenner $
21 * $FreeBSD: head/contrib/tcpdump/print-ip.c 75118 2001-04-03 07:50:46Z fenner $
22 */
23
24#ifndef lint
25static const char rcsid[] =
22 */
23
24#ifndef lint
25static const char rcsid[] =
26 "@(#) $Header: /tcpdump/master/tcpdump/print-ip.c,v 1.79 1999/12/22 06:27:21 itojun Exp $ (LBL)";
26 "@(#) $Header: /tcpdump/master/tcpdump/print-ip.c,v 1.92 2001/01/02 23:00:01 guy Exp $ (LBL)";
27#endif
28
29#ifdef HAVE_CONFIG_H
30#include "config.h"
31#endif
32
33#include <sys/param.h>
34#include <sys/time.h>
35#include <sys/socket.h>
36
37#include <netinet/in.h>
27#endif
28
29#ifdef HAVE_CONFIG_H
30#include "config.h"
31#endif
32
33#include <sys/param.h>
34#include <sys/time.h>
35#include <sys/socket.h>
36
37#include <netinet/in.h>
38#include <netinet/in_systm.h>
39#include <netinet/ip.h>
40#include <netinet/ip_var.h>
41#include <netinet/udp.h>
42#include <netinet/udp_var.h>
43#include <netinet/tcp.h>
44
38
45#ifdef HAVE_MALLOC_H
46#include <malloc.h>
47#endif
48#include <stdio.h>
49#include <stdlib.h>
50#include <string.h>
51#include <unistd.h>
52
53#include "addrtoname.h"
54#include "interface.h"
55#include "extract.h" /* must come after interface.h */
56
39#include <stdio.h>
40#include <stdlib.h>
41#include <string.h>
42#include <unistd.h>
43
44#include "addrtoname.h"
45#include "interface.h"
46#include "extract.h" /* must come after interface.h */
47
48#include "ip.h"
49
57/* Compatibility */
58#ifndef IPPROTO_ND
59#define IPPROTO_ND 77
60#endif
61
50/* Compatibility */
51#ifndef IPPROTO_ND
52#define IPPROTO_ND 77
53#endif
54
62#ifndef IN_CLASSD
63#define IN_CLASSD(i) (((int32_t)(i) & 0xf0000000) == 0xe0000000)
64#endif
65
66/* (following from ipmulti/mrouted/prune.h) */
67
68/*
55/*
69 * The packet format for a traceroute request.
70 */
71struct tr_query {
72 u_int tr_src; /* traceroute source */
73 u_int tr_dst; /* traceroute destination */
74 u_int tr_raddr; /* traceroute response address */
75 u_int tr_rttlqid; /* response ttl and qid */
76};
77
78#define TR_GETTTL(x) (int)(((x) >> 24) & 0xff)
79#define TR_GETQID(x) ((x) & 0x00ffffff)
80
81/*
82 * Traceroute response format. A traceroute response has a tr_query at the
83 * beginning, followed by one tr_resp for each hop taken.
84 */
85struct tr_resp {
86 u_int tr_qarr; /* query arrival time */
87 u_int tr_inaddr; /* incoming interface address */
88 u_int tr_outaddr; /* outgoing interface address */
89 u_int tr_rmtaddr; /* parent address in source tree */
90 u_int tr_vifin; /* input packet count on interface */
91 u_int tr_vifout; /* output packet count on interface */
92 u_int tr_pktcnt; /* total incoming packets for src-grp */
93 u_char tr_rproto; /* routing proto deployed on router */
94 u_char tr_fttl; /* ttl required to forward on outvif */
95 u_char tr_smask; /* subnet mask for src addr */
96 u_char tr_rflags; /* forwarding error codes */
97};
98
99/* defs within mtrace */
100#define TR_QUERY 1
101#define TR_RESP 2
102
103/* fields for tr_rflags (forwarding error codes) */
104#define TR_NO_ERR 0
105#define TR_WRONG_IF 1
106#define TR_PRUNED 2
107#define TR_OPRUNED 3
108#define TR_SCOPED 4
109#define TR_NO_RTE 5
110#define TR_NO_FWD 7
111#define TR_NO_SPACE 0x81
112#define TR_OLD_ROUTER 0x82
113
114/* fields for tr_rproto (routing protocol) */
115#define TR_PROTO_DVMRP 1
116#define TR_PROTO_MOSPF 2
117#define TR_PROTO_PIM 3
118#define TR_PROTO_CBT 4
119
120static void print_mtrace(register const u_char *bp, register u_int len)
121{
122 register struct tr_query *tr = (struct tr_query *)(bp + 8);
123
124 printf("mtrace %lu: %s to %s reply-to %s",
125 (u_long)TR_GETQID(ntohl(tr->tr_rttlqid)),
126 ipaddr_string(&tr->tr_src), ipaddr_string(&tr->tr_dst),
127 ipaddr_string(&tr->tr_raddr));
128 if (IN_CLASSD(ntohl(tr->tr_raddr)))
129 printf(" with-ttl %d", TR_GETTTL(ntohl(tr->tr_rttlqid)));
130}
131
132static void print_mresp(register const u_char *bp, register u_int len)
133{
134 register struct tr_query *tr = (struct tr_query *)(bp + 8);
135
136 printf("mresp %lu: %s to %s reply-to %s",
137 (u_long)TR_GETQID(ntohl(tr->tr_rttlqid)),
138 ipaddr_string(&tr->tr_src), ipaddr_string(&tr->tr_dst),
139 ipaddr_string(&tr->tr_raddr));
140 if (IN_CLASSD(ntohl(tr->tr_raddr)))
141 printf(" with-ttl %d", TR_GETTTL(ntohl(tr->tr_rttlqid)));
142}
143
144static void
145igmp_print(register const u_char *bp, register u_int len,
146 register const u_char *bp2)
147{
148 register const struct ip *ip;
149
150 ip = (const struct ip *)bp2;
151 (void)printf("%s > %s: ",
152 ipaddr_string(&ip->ip_src),
153 ipaddr_string(&ip->ip_dst));
154
155 if (qflag) {
156 (void)printf("igmp");
157 return;
158 }
159
160 TCHECK2(bp[0], 8);
161 switch (bp[0]) {
162 case 0x11:
163 (void)printf("igmp %s query", bp[1] ? "v2" : "v1");
164 if (bp[1] && bp[1] != 100)
165 (void)printf(" [intvl %d]", bp[1]);
166 (void)printf("igmp query");
167 if (EXTRACT_32BITS(&bp[4]))
168 (void)printf(" [gaddr %s]", ipaddr_string(&bp[4]));
169 if (len != 8)
170 (void)printf(" [len %d]", len);
171 break;
172 case 0x12:
173 case 0x16:
174 (void)printf("igmp %s report %s",
175 (bp[0] & 0x0f) == 6 ? "v2" : "v1",
176 ipaddr_string(&bp[4]));
177 if (len != 8)
178 (void)printf(" [len %d]", len);
179 if (bp[1])
180 (void)printf(" [b1=0x%x]", bp[1]);
181 break;
182 case 0x17:
183 (void)printf("igmp leave %s", ipaddr_string(&bp[4]));
184 if (len != 8)
185 (void)printf(" [len %d]", len);
186 if (bp[1])
187 (void)printf(" [b1=0x%x]", bp[1]);
188 break;
189 case 0x13:
190 (void)printf("igmp dvmrp");
191 if (len < 8)
192 (void)printf(" [len %d]", len);
193 else
194 dvmrp_print(bp, len);
195 break;
196 case 0x14:
197 (void)printf("igmp pimv1");
198 pimv1_print(bp, len);
199 break;
200 case 0x1e:
201 print_mresp(bp, len);
202 break;
203 case 0x1f:
204 print_mtrace(bp, len);
205 break;
206 default:
207 (void)printf("igmp-%d", bp[0] & 0xf);
208 if (bp[1])
209 (void)printf(" [b1=0x%02x]", bp[1]);
210 break;
211 }
212
213 if (vflag && TTEST2(bp[0], len)) {
214 /* Check the IGMP checksum */
215 if (in_cksum((const u_short*)bp, len, 0))
216 printf(" bad igmp cksum %x!", EXTRACT_16BITS(&bp[2]));
217 }
218 return;
219trunc:
220 fputs("[|igmp]", stdout);
221}
222
223/*
224 * print the recorded route in an IP RR, LSRR or SSRR option.
225 */
226static void
227ip_printroute(const char *type, register const u_char *cp, u_int length)
228{
229 register u_int ptr = cp[2] - 1;
230 register u_int len;
231

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307static void
308ip_optprint(register const u_char *cp, u_int length)
309{
310 register u_int len;
311
312 for (; length > 0; cp += len, length -= len) {
313 int tt = *cp;
314
56 * print the recorded route in an IP RR, LSRR or SSRR option.
57 */
58static void
59ip_printroute(const char *type, register const u_char *cp, u_int length)
60{
61 register u_int ptr = cp[2] - 1;
62 register u_int len;
63

--- 75 unchanged lines hidden (view full) ---

139static void
140ip_optprint(register const u_char *cp, u_int length)
141{
142 register u_int len;
143
144 for (; length > 0; cp += len, length -= len) {
145 int tt = *cp;
146
315 len = (tt == IPOPT_NOP || tt == IPOPT_EOL) ? 1 : cp[1];
147 if (tt == IPOPT_NOP || tt == IPOPT_EOL)
148 len = 1;
149 else {
150 if (&cp[1] >= snapend) {
151 printf("[|ip]");
152 return;
153 }
154 len = cp[1];
155 }
316 if (len <= 0) {
317 printf("[|ip op len %d]", len);
318 return;
319 }
320 if (&cp[1] >= snapend || cp + len > snapend) {
321 printf("[|ip]");
322 return;
323 }

--- 126 unchanged lines hidden (view full) ---

450 if ((u_char *)(ip + 1) > snapend) {
451 printf("[|ip]");
452 return;
453 }
454 if (length < sizeof (struct ip)) {
455 (void)printf("truncated-ip %d", length);
456 return;
457 }
156 if (len <= 0) {
157 printf("[|ip op len %d]", len);
158 return;
159 }
160 if (&cp[1] >= snapend || cp + len > snapend) {
161 printf("[|ip]");
162 return;
163 }

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290 if ((u_char *)(ip + 1) > snapend) {
291 printf("[|ip]");
292 return;
293 }
294 if (length < sizeof (struct ip)) {
295 (void)printf("truncated-ip %d", length);
296 return;
297 }
458 hlen = ip->ip_hl * 4;
298 hlen = IP_HL(ip) * 4;
299 if (hlen < sizeof (struct ip)) {
300 (void)printf("bad-hlen %d", hlen);
301 return;
302 }
459
460 len = ntohs(ip->ip_len);
461 if (length < len)
462 (void)printf("truncated-ip - %d bytes missing!",
463 len - length);
464 len -= hlen;
465 len0 = len;
466

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516 len -= advance;
517 if (enh < 0)
518 break;
519 nh = enh & 0xff;
520 goto again;
521 }
522
523 case IPPROTO_TCP:
303
304 len = ntohs(ip->ip_len);
305 if (length < len)
306 (void)printf("truncated-ip - %d bytes missing!",
307 len - length);
308 len -= hlen;
309 len0 = len;
310

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360 len -= advance;
361 if (enh < 0)
362 break;
363 nh = enh & 0xff;
364 goto again;
365 }
366
367 case IPPROTO_TCP:
524 tcp_print(cp, len, (const u_char *)ip);
368 tcp_print(cp, len, (const u_char *)ip, (off &~ 0x6000));
525 break;
526
527 case IPPROTO_UDP:
369 break;
370
371 case IPPROTO_UDP:
528 udp_print(cp, len, (const u_char *)ip);
372 udp_print(cp, len, (const u_char *)ip, (off &~ 0x6000));
529 break;
530
531 case IPPROTO_ICMP:
532 icmp_print(cp, len, (const u_char *)ip);
533 break;
534
535#ifndef IPPROTO_IGRP
536#define IPPROTO_IGRP 9

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634
635#ifndef IPPROTO_PIM
636#define IPPROTO_PIM 103
637#endif
638 case IPPROTO_PIM:
639 pim_print(cp, len);
640 break;
641
373 break;
374
375 case IPPROTO_ICMP:
376 icmp_print(cp, len, (const u_char *)ip);
377 break;
378
379#ifndef IPPROTO_IGRP
380#define IPPROTO_IGRP 9

--- 97 unchanged lines hidden (view full) ---

478
479#ifndef IPPROTO_PIM
480#define IPPROTO_PIM 103
481#endif
482 case IPPROTO_PIM:
483 pim_print(cp, len);
484 break;
485
486#ifndef IPPROTO_VRRP
487#define IPPROTO_VRRP 112
488#endif
489 case IPPROTO_VRRP:
490 if (vflag)
491 (void)printf("vrrp %s > %s: ",
492 ipaddr_string(&ip->ip_src),
493 ipaddr_string(&ip->ip_dst));
494 vrrp_print(cp, len, ip->ip_ttl);
495 break;
496
642 default:
643#if 0
644 (void)printf("%s > %s:", ipaddr_string(&ip->ip_src),
645 ipaddr_string(&ip->ip_dst));
646#endif
647 (void)printf(" ip-proto-%d %d", nh, len);
648 break;
649 }

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703 if (ip->ip_ttl > 1) {
704 (void)printf("%sttl %d", sep, (int)ip->ip_ttl);
705 sep = ", ";
706 }
707 if ((off & 0x3fff) == 0) {
708 (void)printf("%sid %d", sep, (int)ntohs(ip->ip_id));
709 sep = ", ";
710 }
497 default:
498#if 0
499 (void)printf("%s > %s:", ipaddr_string(&ip->ip_src),
500 ipaddr_string(&ip->ip_dst));
501#endif
502 (void)printf(" ip-proto-%d %d", nh, len);
503 break;
504 }

--- 53 unchanged lines hidden (view full) ---

558 if (ip->ip_ttl > 1) {
559 (void)printf("%sttl %d", sep, (int)ip->ip_ttl);
560 sep = ", ";
561 }
562 if ((off & 0x3fff) == 0) {
563 (void)printf("%sid %d", sep, (int)ntohs(ip->ip_id));
564 sep = ", ";
565 }
566 (void)printf("%slen %d", sep, (int)ntohs(ip->ip_len));
567 sep = ", ";
711 if ((u_char *)ip + hlen <= snapend) {
712 sum = in_cksum((const u_short *)ip, hlen, 0);
713 if (sum != 0) {
714 (void)printf("%sbad cksum %x!", sep,
715 ntohs(ip->ip_sum));
716 sep = ", ";
717 }
718 }
719 if ((hlen -= sizeof(struct ip)) > 0) {
720 (void)printf("%soptlen=%d", sep, hlen);
721 ip_optprint((u_char *)(ip + 1), hlen);
722 }
723 printf(")");
724 }
725}
568 if ((u_char *)ip + hlen <= snapend) {
569 sum = in_cksum((const u_short *)ip, hlen, 0);
570 if (sum != 0) {
571 (void)printf("%sbad cksum %x!", sep,
572 ntohs(ip->ip_sum));
573 sep = ", ";
574 }
575 }
576 if ((hlen -= sizeof(struct ip)) > 0) {
577 (void)printf("%soptlen=%d", sep, hlen);
578 ip_optprint((u_char *)(ip + 1), hlen);
579 }
580 printf(")");
581 }
582}
583
584void
585ipN_print(register const u_char *bp, register u_int length)
586{
587 struct ip *ip, hdr;
588
589 ip = (struct ip *)bp;
590 if (length < 4) {
591 (void)printf("truncated-ip %d", length);
592 return;
593 }
594 memcpy (&hdr, (char *)ip, 4);
595 switch (IP_V(&hdr)) {
596 case 4:
597 ip_print (bp, length);
598 return;
599#ifdef INET6
600 case 6:
601 ip6_print (bp, length);
602 return;
603#endif
604 default:
605 (void)printf("unknown ip %d", IP_V(&hdr));
606 return;
607 }
608}