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"timed" dissector, from Ben Smithurst.
[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 1.83 2000-10-06 05:35:37 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
37 #ifdef SEGSIZE
38 #undef SEGSIZE
39 #endif
40 #include <arpa/tftp.h>
41
42 #include <rpc/rpc.h>
43
44 #include <stdio.h>
45 #include <string.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 TIMED_PORT 525 /*XXX*/
398 #define RIP_PORT 520 /*XXX*/
399 #define KERBEROS_SEC_PORT 750 /*XXX*/
400 #define L2TP_PORT 1701 /*XXX*/
401 #define ISAKMP_PORT_USER1 7500 /*??? - nonstandard*/
402 #define ISAKMP_PORT_USER2 8500 /*??? - nonstandard*/
403 #define RX_PORT_LOW 7000 /*XXX*/
404 #define RX_PORT_HIGH 7009 /*XXX*/
405 #define NETBIOS_NS_PORT 137
406 #define NETBIOS_DGRAM_PORT 138
407 #define CISCO_AUTORP_PORT 496 /*XXX*/
408
409 #ifdef INET6
410 #define RIPNG_PORT 521 /*XXX*/
411 #define DHCP6_SERV_PORT 546 /*XXX*/
412 #define DHCP6_CLI_PORT 547 /*XXX*/
413 #endif
414
415 void
416 udp_print(register const u_char *bp, u_int length, register const u_char *bp2)
417 {
418 register const struct udphdr *up;
419 register const struct ip *ip;
420 register const u_char *cp;
421 register const u_char *ep = bp + length;
422 u_int16_t sport, dport, ulen;
423 #ifdef INET6
424 register const struct ip6_hdr *ip6;
425 #endif
426
427 if (ep > snapend)
428 ep = snapend;
429 up = (struct udphdr *)bp;
430 ip = (struct ip *)bp2;
431 #ifdef INET6
432 if (IP_V(ip) == 6)
433 ip6 = (struct ip6_hdr *)bp2;
434 else
435 ip6 = NULL;
436 #endif /*INET6*/
437 cp = (u_char *)(up + 1);
438 if (cp > snapend) {
439 (void)printf("%s > %s: [|udp]",
440 ipaddr_string(&ip->ip_src), ipaddr_string(&ip->ip_dst));
441 return;
442 }
443 if (length < sizeof(struct udphdr)) {
444 (void)printf("%s > %s: truncated-udp %d",
445 ipaddr_string(&ip->ip_src), ipaddr_string(&ip->ip_dst),
446 length);
447 return;
448 }
449 length -= sizeof(struct udphdr);
450
451 sport = ntohs(up->uh_sport);
452 dport = ntohs(up->uh_dport);
453 ulen = ntohs(up->uh_ulen);
454 if (ulen < 8) {
455 (void)printf("%s > %s: truncated-udplength %d",
456 ipaddr_string(&ip->ip_src),
457 ipaddr_string(&ip->ip_dst),
458 ulen);
459 return;
460 }
461 if (packettype) {
462 register struct rpc_msg *rp;
463 enum msg_type direction;
464
465 switch (packettype) {
466
467 case PT_VAT:
468 (void)printf("%s.%s > %s.%s:",
469 ipaddr_string(&ip->ip_src),
470 udpport_string(sport),
471 ipaddr_string(&ip->ip_dst),
472 udpport_string(dport));
473 vat_print((void *)(up + 1), length, up);
474 break;
475
476 case PT_WB:
477 (void)printf("%s.%s > %s.%s:",
478 ipaddr_string(&ip->ip_src),
479 udpport_string(sport),
480 ipaddr_string(&ip->ip_dst),
481 udpport_string(dport));
482 wb_print((void *)(up + 1), length);
483 break;
484
485 case PT_RPC:
486 rp = (struct rpc_msg *)(up + 1);
487 direction = (enum msg_type)ntohl(rp->rm_direction);
488 if (direction == CALL)
489 sunrpcrequest_print((u_char *)rp, length,
490 (u_char *)ip);
491 else
492 nfsreply_print((u_char *)rp, length,
493 (u_char *)ip); /*XXX*/
494 break;
495
496 case PT_RTP:
497 (void)printf("%s.%s > %s.%s:",
498 ipaddr_string(&ip->ip_src),
499 udpport_string(sport),
500 ipaddr_string(&ip->ip_dst),
501 udpport_string(dport));
502 rtp_print((void *)(up + 1), length, up);
503 break;
504
505 case PT_RTCP:
506 (void)printf("%s.%s > %s.%s:",
507 ipaddr_string(&ip->ip_src),
508 udpport_string(sport),
509 ipaddr_string(&ip->ip_dst),
510 udpport_string(dport));
511 while (cp < ep)
512 cp = rtcp_print(cp, ep);
513 break;
514
515 case PT_SNMP:
516 (void)printf("%s.%s > %s.%s:",
517 ipaddr_string(&ip->ip_src),
518 udpport_string(sport),
519 ipaddr_string(&ip->ip_dst),
520 udpport_string(dport));
521 snmp_print((const u_char *)(up + 1), length);
522 break;
523
524 case PT_CNFP:
525 (void)printf("%s.%s > %s.%s:",
526 ipaddr_string(&ip->ip_src),
527 udpport_string(sport),
528 ipaddr_string(&ip->ip_dst),
529 udpport_string(dport));
530 cnfp_print(cp, length, (const u_char *)ip);
531 break;
532 }
533 return;
534 }
535
536 if (!qflag) {
537 register struct rpc_msg *rp;
538 enum msg_type direction;
539
540 rp = (struct rpc_msg *)(up + 1);
541 if (TTEST(rp->rm_direction)) {
542 direction = (enum msg_type)ntohl(rp->rm_direction);
543 if (dport == NFS_PORT && direction == CALL) {
544 nfsreq_print((u_char *)rp, length,
545 (u_char *)ip);
546 return;
547 }
548 if (sport == NFS_PORT && direction == REPLY) {
549 nfsreply_print((u_char *)rp, length,
550 (u_char *)ip);
551 return;
552 }
553 #ifdef notdef
554 if (dport == SUNRPC_PORT && direction == CALL) {
555 sunrpcrequest_print((u_char *)rp, length, (u_char *)ip);
556 return;
557 }
558 #endif
559 }
560 if (TTEST(((struct LAP *)cp)->type) &&
561 ((struct LAP *)cp)->type == lapDDP &&
562 (atalk_port(sport) || atalk_port(dport))) {
563 if (vflag)
564 fputs("kip ", stdout);
565 atalk_print(cp, length);
566 return;
567 }
568 }
569 #if 0
570 (void)printf("%s.%s > %s.%s:",
571 ipaddr_string(&ip->ip_src), udpport_string(sport),
572 ipaddr_string(&ip->ip_dst), udpport_string(dport));
573 #else
574 #ifdef INET6
575 if (ip6) {
576 if (ip6->ip6_nxt == IPPROTO_UDP) {
577 (void)printf("%s.%s > %s.%s: ",
578 ip6addr_string(&ip6->ip6_src),
579 udpport_string(sport),
580 ip6addr_string(&ip6->ip6_dst),
581 udpport_string(dport));
582 } else {
583 (void)printf("%s > %s: ",
584 udpport_string(sport), udpport_string(dport));
585 }
586 } else
587 #endif /*INET6*/
588 {
589 if (ip->ip_p == IPPROTO_UDP) {
590 (void)printf("%s.%s > %s.%s: ",
591 ipaddr_string(&ip->ip_src),
592 udpport_string(sport),
593 ipaddr_string(&ip->ip_dst),
594 udpport_string(dport));
595 } else {
596 (void)printf("%s > %s: ",
597 udpport_string(sport), udpport_string(dport));
598 }
599 }
600 #endif
601
602 if (IP_V(ip) == 4 && vflag) {
603 int sum = up->uh_sum;
604 if (sum == 0) {
605 (void)printf(" [no cksum]");
606 } else if (TTEST2(cp[0], length)) {
607 sum = udp_cksum(ip, up, length);
608 if (sum != 0)
609 (void)printf(" [bad udp cksum %x!]", sum);
610 else
611 (void)printf(" [udp sum ok]");
612 }
613 }
614 #ifdef INET6
615 if (IP_V(ip) == 6 && ip6->ip6_plen && vflag) {
616 int sum = up->uh_sum;
617 /* for IPv6, UDP checksum is mandatory */
618 if (TTEST2(cp[0], length)) {
619 sum = udp6_cksum(ip6, up, length);
620 if (sum != 0)
621 (void)printf(" [bad udp cksum %x!]", sum);
622 else
623 (void)printf(" [udp sum ok]");
624 }
625 }
626 #endif
627
628 if (!qflag) {
629 #define ISPORT(p) (dport == (p) || sport == (p))
630 if (ISPORT(NAMESERVER_PORT))
631 ns_print((const u_char *)(up + 1), length);
632 else if (ISPORT(TIMED_PORT))
633 timed_print((const u_char *)(up + 1), length);
634 else if (ISPORT(TFTP_PORT))
635 tftp_print((const u_char *)(up + 1), length);
636 else if (ISPORT(IPPORT_BOOTPC) || ISPORT(IPPORT_BOOTPS))
637 bootp_print((const u_char *)(up + 1), length,
638 sport, dport);
639 else if (ISPORT(RIP_PORT))
640 rip_print((const u_char *)(up + 1), length);
641 else if (ISPORT(ISAKMP_PORT))
642 isakmp_print((const u_char *)(up + 1), length, bp2);
643 #if 1 /*???*/
644 else if (ISPORT(ISAKMP_PORT_USER1) || ISPORT(ISAKMP_PORT_USER2))
645 isakmp_print((const u_char *)(up + 1), length, bp2);
646 #endif
647 else if (ISPORT(SNMP_PORT) || ISPORT(SNMPTRAP_PORT))
648 snmp_print((const u_char *)(up + 1), length);
649 else if (ISPORT(NTP_PORT))
650 ntp_print((const u_char *)(up + 1), length);
651 else if (ISPORT(KERBEROS_PORT) || ISPORT(KERBEROS_SEC_PORT))
652 krb_print((const void *)(up + 1), length);
653 else if (ISPORT(L2TP_PORT))
654 l2tp_print((const u_char *)(up + 1), length);
655 else if (ISPORT(NETBIOS_NS_PORT)) {
656 nbt_udp137_print((const u_char *)(up + 1), length);
657 }
658 else if (ISPORT(NETBIOS_DGRAM_PORT)) {
659 nbt_udp138_print((const u_char *)(up + 1), length);
660 }
661 else if (dport == 3456)
662 vat_print((const void *)(up + 1), length, up);
663 /*
664 * Since there are 10 possible ports to check, I think
665 * a <> test would be more efficient
666 */
667 else if ((sport >= RX_PORT_LOW && sport <= RX_PORT_HIGH) ||
668 (dport >= RX_PORT_LOW && dport <= RX_PORT_HIGH))
669 rx_print((const void *)(up + 1), length, sport, dport,
670 (u_char *) ip);
671 #ifdef INET6
672 else if (ISPORT(RIPNG_PORT))
673 ripng_print((const u_char *)(up + 1), length);
674 else if (ISPORT(DHCP6_SERV_PORT) || ISPORT(DHCP6_CLI_PORT)) {
675 dhcp6_print((const u_char *)(up + 1), length,
676 sport, dport);
677 }
678 #endif /*INET6*/
679 /*
680 * Kludge in test for whiteboard packets.
681 */
682 else if (dport == 4567)
683 wb_print((const void *)(up + 1), length);
684 else if (ISPORT(CISCO_AUTORP_PORT))
685 cisco_autorp_print((const void *)(up + 1), length);
686 else
687 (void)printf(" udp %u",
688 (u_int32_t)(ulen - sizeof(*up)));
689 #undef ISPORT
690 } else
691 (void)printf(" udp %u", (u_int32_t)(ulen - sizeof(*up)));
692 }
[mirror] the TCPdump network dissector