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Add an "ip.h" header, to declare the IP stuff needed by dissectors, and
[tcpdump] / print-udp.c
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
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
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
22 #ifndef lint
23 static const char rcsid[] =
24 "@(#) $Header: /tcpdump/master/tcpdump/print-udp.c,v 1.79 2000-09-23 08:54:42 guy Exp $ (LBL)";
25 #endif
26
27 #ifdef HAVE_CONFIG_H
28 #include "config.h"
29 #endif
30
31 #include <sys/param.h>
32 #include <sys/time.h>
33 #include <sys/socket.h>
34
35 #include <netinet/in.h>
36 #include <netinet/in_systm.h>
37
38 #ifdef SEGSIZE
39 #undef SEGSIZE
40 #endif
41 #include <arpa/tftp.h>
42
43 #include <rpc/rpc.h>
44
45 #include <stdio.h>
46
47 #ifdef INET6
48 #include <netinet/ip6.h>
49 #endif
50
51 #include "interface.h"
52 #include "addrtoname.h"
53 #include "appletalk.h"
54
55 #include "udp.h"
56
57 #include "ip.h"
58
59 #ifdef NOERROR
60 #undef NOERROR /* Solaris sucks */
61 #endif
62 #ifdef T_UNSPEC
63 #undef T_UNSPEC /* SINIX does too */
64 #endif
65 #include "nameser.h"
66 #include "nfs.h"
67 #include "bootp.h"
68
69 struct rtcphdr {
70 u_int16_t rh_flags; /* T:2 P:1 CNT:5 PT:8 */
71 u_int16_t rh_len; /* length of message (in words) */
72 u_int32_t rh_ssrc; /* synchronization src id */
73 };
74
75 typedef struct {
76 u_int32_t upper; /* more significant 32 bits */
77 u_int32_t lower; /* less significant 32 bits */
78 } ntp64;
79
80 /*
81 * Sender report.
82 */
83 struct rtcp_sr {
84 ntp64 sr_ntp; /* 64-bit ntp timestamp */
85 u_int32_t sr_ts; /* reference media timestamp */
86 u_int32_t sr_np; /* no. packets sent */
87 u_int32_t sr_nb; /* no. bytes sent */
88 };
89
90 /*
91 * Receiver report.
92 * Time stamps are middle 32-bits of ntp timestamp.
93 */
94 struct rtcp_rr {
95 u_int32_t rr_srcid; /* sender being reported */
96 u_int32_t rr_nl; /* no. packets lost */
97 u_int32_t rr_ls; /* extended last seq number received */
98 u_int32_t rr_dv; /* jitter (delay variance) */
99 u_int32_t rr_lsr; /* orig. ts from last rr from this src */
100 u_int32_t rr_dlsr; /* time from recpt of last rr to xmit time */
101 };
102
103 /*XXX*/
104 #define RTCP_PT_SR 200
105 #define RTCP_PT_RR 201
106 #define RTCP_PT_SDES 202
107 #define RTCP_SDES_CNAME 1
108 #define RTCP_SDES_NAME 2
109 #define RTCP_SDES_EMAIL 3
110 #define RTCP_SDES_PHONE 4
111 #define RTCP_SDES_LOC 5
112 #define RTCP_SDES_TOOL 6
113 #define RTCP_SDES_NOTE 7
114 #define RTCP_SDES_PRIV 8
115 #define RTCP_PT_BYE 203
116 #define RTCP_PT_APP 204
117
118 static void
119 vat_print(const void *hdr, u_int len, register const struct udphdr *up)
120 {
121 /* vat/vt audio */
122 u_int ts = *(u_int16_t *)hdr;
123 if ((ts & 0xf060) != 0) {
124 /* probably vt */
125 (void)printf(" udp/vt %u %d / %d",
126 (u_int32_t)(ntohs(up->uh_ulen) - sizeof(*up)),
127 ts & 0x3ff, ts >> 10);
128 } else {
129 /* probably vat */
130 u_int32_t i0 = (u_int32_t)ntohl(((u_int *)hdr)[0]);
131 u_int32_t i1 = (u_int32_t)ntohl(((u_int *)hdr)[1]);
132 printf(" udp/vat %u c%d %u%s",
133 (u_int32_t)(ntohs(up->uh_ulen) - sizeof(*up) - 8),
134 i0 & 0xffff,
135 i1, i0 & 0x800000? "*" : "");
136 /* audio format */
137 if (i0 & 0x1f0000)
138 printf(" f%d", (i0 >> 16) & 0x1f);
139 if (i0 & 0x3f000000)
140 printf(" s%d", (i0 >> 24) & 0x3f);
141 }
142 }
143
144 static void
145 rtp_print(const void *hdr, u_int len, register const struct udphdr *up)
146 {
147 /* rtp v1 or v2 */
148 u_int *ip = (u_int *)hdr;
149 u_int hasopt, hasext, contype, hasmarker;
150 u_int32_t i0 = (u_int32_t)ntohl(((u_int *)hdr)[0]);
151 u_int32_t i1 = (u_int32_t)ntohl(((u_int *)hdr)[1]);
152 u_int dlen = ntohs(up->uh_ulen) - sizeof(*up) - 8;
153 const char * ptype;
154
155 ip += 2;
156 len >>= 2;
157 len -= 2;
158 hasopt = 0;
159 hasext = 0;
160 if ((i0 >> 30) == 1) {
161 /* rtp v1 */
162 hasopt = i0 & 0x800000;
163 contype = (i0 >> 16) & 0x3f;
164 hasmarker = i0 & 0x400000;
165 ptype = "rtpv1";
166 } else {
167 /* rtp v2 */
168 hasext = i0 & 0x10000000;
169 contype = (i0 >> 16) & 0x7f;
170 hasmarker = i0 & 0x800000;
171 dlen -= 4;
172 ptype = "rtp";
173 ip += 1;
174 len -= 1;
175 }
176 printf(" udp/%s %d c%d %s%s %d %u",
177 ptype,
178 dlen,
179 contype,
180 (hasopt || hasext)? "+" : "",
181 hasmarker? "*" : "",
182 i0 & 0xffff,
183 i1);
184 if (vflag) {
185 printf(" %u", (u_int32_t)ntohl(((u_int *)hdr)[2]));
186 if (hasopt) {
187 u_int i2, optlen;
188 do {
189 i2 = ip[0];
190 optlen = (i2 >> 16) & 0xff;
191 if (optlen == 0 || optlen > len) {
192 printf(" !opt");
193 return;
194 }
195 ip += optlen;
196 len -= optlen;
197 } while ((int)i2 >= 0);
198 }
199 if (hasext) {
200 u_int i2, extlen;
201 i2 = ip[0];
202 extlen = (i2 & 0xffff) + 1;
203 if (extlen > len) {
204 printf(" !ext");
205 return;
206 }
207 ip += extlen;
208 }
209 if (contype == 0x1f) /*XXX H.261 */
210 printf(" 0x%04x", ip[0] >> 16);
211 }
212 }
213
214 static const u_char *
215 rtcp_print(const u_char *hdr, const u_char *ep)
216 {
217 /* rtp v2 control (rtcp) */
218 struct rtcp_rr *rr = 0;
219 struct rtcp_sr *sr;
220 struct rtcphdr *rh = (struct rtcphdr *)hdr;
221 u_int len;
222 u_int16_t flags;
223 int cnt;
224 double ts, dts;
225 if ((u_char *)(rh + 1) > ep) {
226 printf(" [|rtcp]");
227 return (ep);
228 }
229 len = (ntohs(rh->rh_len) + 1) * 4;
230 flags = ntohs(rh->rh_flags);
231 cnt = (flags >> 8) & 0x1f;
232 switch (flags & 0xff) {
233 case RTCP_PT_SR:
234 sr = (struct rtcp_sr *)(rh + 1);
235 printf(" sr");
236 if (len != cnt * sizeof(*rr) + sizeof(*sr) + sizeof(*rh))
237 printf(" [%d]", len);
238 if (vflag)
239 printf(" %u", (u_int32_t)ntohl(rh->rh_ssrc));
240 if ((u_char *)(sr + 1) > ep) {
241 printf(" [|rtcp]");
242 return (ep);
243 }
244 ts = (double)((u_int32_t)ntohl(sr->sr_ntp.upper)) +
245 ((double)((u_int32_t)ntohl(sr->sr_ntp.lower)) /
246 4294967296.0);
247 printf(" @%.2f %u %up %ub", ts, (u_int32_t)ntohl(sr->sr_ts),
248 (u_int32_t)ntohl(sr->sr_np), (u_int32_t)ntohl(sr->sr_nb));
249 rr = (struct rtcp_rr *)(sr + 1);
250 break;
251 case RTCP_PT_RR:
252 printf(" rr");
253 if (len != cnt * sizeof(*rr) + sizeof(*rh))
254 printf(" [%d]", len);
255 rr = (struct rtcp_rr *)(rh + 1);
256 if (vflag)
257 printf(" %u", (u_int32_t)ntohl(rh->rh_ssrc));
258 break;
259 case RTCP_PT_SDES:
260 printf(" sdes %d", len);
261 if (vflag)
262 printf(" %u", (u_int32_t)ntohl(rh->rh_ssrc));
263 cnt = 0;
264 break;
265 case RTCP_PT_BYE:
266 printf(" bye %d", len);
267 if (vflag)
268 printf(" %u", (u_int32_t)ntohl(rh->rh_ssrc));
269 cnt = 0;
270 break;
271 default:
272 printf(" type-0x%x %d", flags & 0xff, len);
273 cnt = 0;
274 break;
275 }
276 if (cnt > 1)
277 printf(" c%d", cnt);
278 while (--cnt >= 0) {
279 if ((u_char *)(rr + 1) > ep) {
280 printf(" [|rtcp]");
281 return (ep);
282 }
283 if (vflag)
284 printf(" %u", (u_int32_t)ntohl(rr->rr_srcid));
285 ts = (double)((u_int32_t)ntohl(rr->rr_lsr)) / 65536.;
286 dts = (double)((u_int32_t)ntohl(rr->rr_dlsr)) / 65536.;
287 printf(" %ul %us %uj @%.2f+%.2f",
288 (u_int32_t)ntohl(rr->rr_nl) & 0x00ffffff,
289 (u_int32_t)ntohl(rr->rr_ls),
290 (u_int32_t)ntohl(rr->rr_dv), ts, dts);
291 }
292 return (hdr + len);
293 }
294
295 static int udp_cksum(register const struct ip *ip,
296 register const struct udphdr *up,
297 register int len)
298 {
299 int i, tlen;
300 union phu {
301 struct phdr {
302 u_int32_t src;
303 u_int32_t dst;
304 u_char mbz;
305 u_char proto;
306 u_int16_t len;
307 } ph;
308 u_int16_t pa[6];
309 } phu;
310 register const u_int16_t *sp;
311 u_int32_t sum;
312 tlen = ntohs(ip->ip_len) - ((const char *)up-(const char*)ip);
313
314 /* pseudo-header.. */
315 phu.ph.len = htons(tlen);
316 phu.ph.mbz = 0;
317 phu.ph.proto = IPPROTO_UDP;
318 memcpy(&phu.ph.src, &ip->ip_src.s_addr, sizeof(u_int32_t));
319 memcpy(&phu.ph.dst, &ip->ip_dst.s_addr, sizeof(u_int32_t));
320
321 sp = &phu.pa[0];
322 sum = sp[0]+sp[1]+sp[2]+sp[3]+sp[4]+sp[5];
323
324 sp = (const u_int16_t *)up;
325
326 for (i=0; i<(tlen&~1); i+= 2)
327 sum += *sp++;
328
329 if (tlen & 1) {
330 sum += htons( (*(const char *)sp) << 8);
331 }
332
333 while (sum > 0xffff)
334 sum = (sum & 0xffff) + (sum >> 16);
335 sum = ~sum & 0xffff;
336
337 return (sum);
338 }
339
340 #ifdef INET6
341 static int udp6_cksum(const struct ip6_hdr *ip6, const struct udphdr *up,
342 int len)
343 {
344 int i, tlen;
345 register const u_int16_t *sp;
346 u_int32_t sum;
347 union {
348 struct {
349 struct in6_addr ph_src;
350 struct in6_addr ph_dst;
351 u_int32_t ph_len;
352 u_int8_t ph_zero[3];
353 u_int8_t ph_nxt;
354 } ph;
355 u_int16_t pa[20];
356 } phu;
357
358 tlen = ntohs(ip6->ip6_plen) + sizeof(struct ip6_hdr) -
359 ((const char *)up - (const char*)ip6);
360
361 /* pseudo-header */
362 memset(&phu, 0, sizeof(phu));
363 phu.ph.ph_src = ip6->ip6_src;
364 phu.ph.ph_dst = ip6->ip6_dst;
365 phu.ph.ph_len = htonl(tlen);
366 phu.ph.ph_nxt = IPPROTO_UDP;
367
368 sum = 0;
369 for (i = 0; i < sizeof(phu.pa) / sizeof(phu.pa[0]); i++)
370 sum += phu.pa[i];
371
372 sp = (const u_int16_t *)up;
373
374 for (i = 0; i < (tlen & ~1); i += 2)
375 sum += *sp++;
376
377 if (tlen & 1)
378 sum += htons((*(const char *)sp) << 8);
379
380 while (sum > 0xffff)
381 sum = (sum & 0xffff) + (sum >> 16);
382 sum = ~sum & 0xffff;
383
384 return (sum);
385 }
386 #endif
387
388
389 /* XXX probably should use getservbyname() and cache answers */
390 #define TFTP_PORT 69 /*XXX*/
391 #define KERBEROS_PORT 88 /*XXX*/
392 #define SUNRPC_PORT 111 /*XXX*/
393 #define SNMP_PORT 161 /*XXX*/
394 #define NTP_PORT 123 /*XXX*/
395 #define SNMPTRAP_PORT 162 /*XXX*/
396 #define ISAKMP_PORT 500 /*XXX*/
397 #define RIP_PORT 520 /*XXX*/
398 #define KERBEROS_SEC_PORT 750 /*XXX*/
399 #define L2TP_PORT 1701 /*XXX*/
400 #define ISAKMP_PORT_USER1 7500 /*??? - nonstandard*/
401 #define ISAKMP_PORT_USER2 8500 /*??? - nonstandard*/
402 #define RX_PORT_LOW 7000 /*XXX*/
403 #define RX_PORT_HIGH 7009 /*XXX*/
404 #define NETBIOS_NS_PORT 137
405 #define NETBIOS_DGRAM_PORT 138
406 #define CISCO_AUTORP_PORT 496 /*XXX*/
407
408 #ifdef INET6
409 #define RIPNG_PORT 521 /*XXX*/
410 #define DHCP6_SERV_PORT 546 /*XXX*/
411 #define DHCP6_CLI_PORT 547 /*XXX*/
412 #endif
413
414 void
415 udp_print(register const u_char *bp, u_int length, register const u_char *bp2)
416 {
417 register const struct udphdr *up;
418 register const struct ip *ip;
419 register const u_char *cp;
420 register const u_char *ep = bp + length;
421 u_int16_t sport, dport, ulen;
422 #ifdef INET6
423 register const struct ip6_hdr *ip6;
424 #endif
425
426 if (ep > snapend)
427 ep = snapend;
428 up = (struct udphdr *)bp;
429 ip = (struct ip *)bp2;
430 #ifdef INET6
431 if (ip->ip_v == 6)
432 ip6 = (struct ip6_hdr *)bp2;
433 else
434 ip6 = NULL;
435 #endif /*INET6*/
436 cp = (u_char *)(up + 1);
437 if (cp > snapend) {
438 (void)printf("%s > %s: [|udp]",
439 ipaddr_string(&ip->ip_src), ipaddr_string(&ip->ip_dst));
440 return;
441 }
442 if (length < sizeof(struct udphdr)) {
443 (void)printf("%s > %s: truncated-udp %d",
444 ipaddr_string(&ip->ip_src), ipaddr_string(&ip->ip_dst),
445 length);
446 return;
447 }
448 length -= sizeof(struct udphdr);
449
450 sport = ntohs(up->uh_sport);
451 dport = ntohs(up->uh_dport);
452 ulen = ntohs(up->uh_ulen);
453 if (ulen < 8) {
454 (void)printf("%s > %s: truncated-udplength %d",
455 ipaddr_string(&ip->ip_src),
456 ipaddr_string(&ip->ip_dst),
457 ulen);
458 return;
459 }
460 if (packettype) {
461 register struct rpc_msg *rp;
462 enum msg_type direction;
463
464 switch (packettype) {
465
466 case PT_VAT:
467 (void)printf("%s.%s > %s.%s:",
468 ipaddr_string(&ip->ip_src),
469 udpport_string(sport),
470 ipaddr_string(&ip->ip_dst),
471 udpport_string(dport));
472 vat_print((void *)(up + 1), length, up);
473 break;
474
475 case PT_WB:
476 (void)printf("%s.%s > %s.%s:",
477 ipaddr_string(&ip->ip_src),
478 udpport_string(sport),
479 ipaddr_string(&ip->ip_dst),
480 udpport_string(dport));
481 wb_print((void *)(up + 1), length);
482 break;
483
484 case PT_RPC:
485 rp = (struct rpc_msg *)(up + 1);
486 direction = (enum msg_type)ntohl(rp->rm_direction);
487 if (direction == CALL)
488 sunrpcrequest_print((u_char *)rp, length,
489 (u_char *)ip);
490 else
491 nfsreply_print((u_char *)rp, length,
492 (u_char *)ip); /*XXX*/
493 break;
494
495 case PT_RTP:
496 (void)printf("%s.%s > %s.%s:",
497 ipaddr_string(&ip->ip_src),
498 udpport_string(sport),
499 ipaddr_string(&ip->ip_dst),
500 udpport_string(dport));
501 rtp_print((void *)(up + 1), length, up);
502 break;
503
504 case PT_RTCP:
505 (void)printf("%s.%s > %s.%s:",
506 ipaddr_string(&ip->ip_src),
507 udpport_string(sport),
508 ipaddr_string(&ip->ip_dst),
509 udpport_string(dport));
510 while (cp < ep)
511 cp = rtcp_print(cp, ep);
512 break;
513
514 case PT_SNMP:
515 (void)printf("%s.%s > %s.%s:",
516 ipaddr_string(&ip->ip_src),
517 udpport_string(sport),
518 ipaddr_string(&ip->ip_dst),
519 udpport_string(dport));
520 snmp_print((const u_char *)(up + 1), length);
521 break;
522
523 case PT_CNFP:
524 (void)printf("%s.%s > %s.%s:",
525 ipaddr_string(&ip->ip_src),
526 udpport_string(sport),
527 ipaddr_string(&ip->ip_dst),
528 udpport_string(dport));
529 cnfp_print(cp, length, (const u_char *)ip);
530 break;
531 }
532 return;
533 }
534
535 if (!qflag) {
536 register struct rpc_msg *rp;
537 enum msg_type direction;
538
539 rp = (struct rpc_msg *)(up + 1);
540 if (TTEST(rp->rm_direction)) {
541 direction = (enum msg_type)ntohl(rp->rm_direction);
542 if (dport == NFS_PORT && direction == CALL) {
543 nfsreq_print((u_char *)rp, length,
544 (u_char *)ip);
545 return;
546 }
547 if (sport == NFS_PORT && direction == REPLY) {
548 nfsreply_print((u_char *)rp, length,
549 (u_char *)ip);
550 return;
551 }
552 #ifdef notdef
553 if (dport == SUNRPC_PORT && direction == CALL) {
554 sunrpcrequest_print((u_char *)rp, length, (u_char *)ip);
555 return;
556 }
557 #endif
558 }
559 if (TTEST(((struct LAP *)cp)->type) &&
560 ((struct LAP *)cp)->type == lapDDP &&
561 (atalk_port(sport) || atalk_port(dport))) {
562 if (vflag)
563 fputs("kip ", stdout);
564 atalk_print(cp, length);
565 return;
566 }
567 }
568 #if 0
569 (void)printf("%s.%s > %s.%s:",
570 ipaddr_string(&ip->ip_src), udpport_string(sport),
571 ipaddr_string(&ip->ip_dst), udpport_string(dport));
572 #else
573 #ifdef INET6
574 if (ip6) {
575 if (ip6->ip6_nxt == IPPROTO_UDP) {
576 (void)printf("%s.%s > %s.%s: ",
577 ip6addr_string(&ip6->ip6_src),
578 udpport_string(sport),
579 ip6addr_string(&ip6->ip6_dst),
580 udpport_string(dport));
581 } else {
582 (void)printf("%s > %s: ",
583 udpport_string(sport), udpport_string(dport));
584 }
585 } else
586 #endif /*INET6*/
587 {
588 if (ip->ip_p == IPPROTO_UDP) {
589 (void)printf("%s.%s > %s.%s: ",
590 ipaddr_string(&ip->ip_src),
591 udpport_string(sport),
592 ipaddr_string(&ip->ip_dst),
593 udpport_string(dport));
594 } else {
595 (void)printf("%s > %s: ",
596 udpport_string(sport), udpport_string(dport));
597 }
598 }
599 #endif
600
601 if (ip->ip_v == 4 && vflag) {
602 int sum = up->uh_sum;
603 if (sum == 0) {
604 (void)printf(" [no cksum]");
605 } else if (TTEST2(cp[0], length)) {
606 sum = udp_cksum(ip, up, length);
607 if (sum != 0)
608 (void)printf(" [bad udp cksum %x!]", sum);
609 else
610 (void)printf(" [udp sum ok]");
611 }
612 }
613 #ifdef INET6
614 if (ip->ip_v == 6 && ip6->ip6_plen && vflag) {
615 int sum = up->uh_sum;
616 /* for IPv6, UDP checksum is mandatory */
617 if (TTEST2(cp[0], length)) {
618 sum = udp6_cksum(ip6, up, length);
619 if (sum != 0)
620 (void)printf(" [bad udp cksum %x!]", sum);
621 else
622 (void)printf(" [udp sum ok]");
623 }
624 }
625 #endif
626
627 if (!qflag) {
628 #define ISPORT(p) (dport == (p) || sport == (p))
629 if (ISPORT(NAMESERVER_PORT))
630 ns_print((const u_char *)(up + 1), length);
631 else if (ISPORT(TFTP_PORT))
632 tftp_print((const u_char *)(up + 1), length);
633 else if (ISPORT(IPPORT_BOOTPC) || ISPORT(IPPORT_BOOTPS))
634 bootp_print((const u_char *)(up + 1), length,
635 sport, dport);
636 else if (ISPORT(RIP_PORT))
637 rip_print((const u_char *)(up + 1), length);
638 else if (ISPORT(ISAKMP_PORT))
639 isakmp_print((const u_char *)(up + 1), length, bp2);
640 #if 1 /*???*/
641 else if (ISPORT(ISAKMP_PORT_USER1) || ISPORT(ISAKMP_PORT_USER2))
642 isakmp_print((const u_char *)(up + 1), length, bp2);
643 #endif
644 else if (ISPORT(SNMP_PORT) || ISPORT(SNMPTRAP_PORT))
645 snmp_print((const u_char *)(up + 1), length);
646 else if (ISPORT(NTP_PORT))
647 ntp_print((const u_char *)(up + 1), length);
648 else if (ISPORT(KERBEROS_PORT) || ISPORT(KERBEROS_SEC_PORT))
649 krb_print((const void *)(up + 1), length);
650 else if (ISPORT(L2TP_PORT))
651 l2tp_print((const u_char *)(up + 1), length);
652 else if (ISPORT(NETBIOS_NS_PORT)) {
653 nbt_udp137_print((const u_char *)(up + 1), length);
654 }
655 else if (ISPORT(NETBIOS_DGRAM_PORT)) {
656 nbt_udp138_print((const u_char *)(up + 1), length);
657 }
658 else if (dport == 3456)
659 vat_print((const void *)(up + 1), length, up);
660 /*
661 * Since there are 10 possible ports to check, I think
662 * a <> test would be more efficient
663 */
664 else if ((sport >= RX_PORT_LOW && sport <= RX_PORT_HIGH) ||
665 (dport >= RX_PORT_LOW && dport <= RX_PORT_HIGH))
666 rx_print((const void *)(up + 1), length, sport, dport,
667 (u_char *) ip);
668 #ifdef INET6
669 else if (ISPORT(RIPNG_PORT))
670 ripng_print((const u_char *)(up + 1), length);
671 else if (ISPORT(DHCP6_SERV_PORT) || ISPORT(DHCP6_CLI_PORT)) {
672 dhcp6_print((const u_char *)(up + 1), length,
673 sport, dport);
674 }
675 #endif /*INET6*/
676 /*
677 * Kludge in test for whiteboard packets.
678 */
679 else if (dport == 4567)
680 wb_print((const void *)(up + 1), length);
681 else if (ISPORT(CISCO_AUTORP_PORT))
682 cisco_autorp_print((const void *)(up + 1), length);
683 else
684 (void)printf(" udp %u",
685 (u_int32_t)(ulen - sizeof(*up)));
686 #undef ISPORT
687 } else
688 (void)printf(" udp %u", (u_int32_t)(ulen - sizeof(*up)));
689 }
[mirror] the TCPdump network dissector