2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
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
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.
25 static const char rcsid[] =
26 "@(#) $Header: /tcpdump/master/tcpdump/print-udp.c,v 1.90 2000/12/23 20:55:22 guy Exp $ (LBL)";
33 #include <sys/param.h>
36 #include <netinet/in.h>
41 #include <arpa/tftp.h>
48 #include "interface.h"
49 #include "addrtoname.h"
50 #include "appletalk.h"
60 #undef NOERROR /* Solaris sucks */
63 #undef T_UNSPEC /* SINIX does too */
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 */
76 u_int32_t upper; /* more significant 32 bits */
77 u_int32_t lower; /* less significant 32 bits */
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 */
92 * Time stamps are middle 32-bits of ntp timestamp.
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 */
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
119 vat_print(const void *hdr, u_int len, register const struct udphdr *up)
122 u_int ts = *(u_int16_t *)hdr;
123 if ((ts & 0xf060) != 0) {
125 (void)printf(" udp/vt %u %d / %d",
126 (u_int32_t)(ntohs(up->uh_ulen) - sizeof(*up)),
127 ts & 0x3ff, ts >> 10);
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),
135 i1, i0 & 0x800000? "*" : "");
138 printf(" f%d", (i0 >> 16) & 0x1f);
140 printf(" s%d", (i0 >> 24) & 0x3f);
145 rtp_print(const void *hdr, u_int len, register const struct udphdr *up)
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;
160 if ((i0 >> 30) == 1) {
162 hasopt = i0 & 0x800000;
163 contype = (i0 >> 16) & 0x3f;
164 hasmarker = i0 & 0x400000;
168 hasext = i0 & 0x10000000;
169 contype = (i0 >> 16) & 0x7f;
170 hasmarker = i0 & 0x800000;
176 printf(" udp/%s %d c%d %s%s %d %u",
180 (hasopt || hasext)? "+" : "",
185 printf(" %u", (u_int32_t)ntohl(((u_int *)hdr)[2]));
190 optlen = (i2 >> 16) & 0xff;
191 if (optlen == 0 || optlen > len) {
197 } while ((int)i2 >= 0);
202 extlen = (i2 & 0xffff) + 1;
209 if (contype == 0x1f) /*XXX H.261 */
210 printf(" 0x%04x", ip[0] >> 16);
214 static const u_char *
215 rtcp_print(const u_char *hdr, const u_char *ep)
217 /* rtp v2 control (rtcp) */
218 struct rtcp_rr *rr = 0;
220 struct rtcphdr *rh = (struct rtcphdr *)hdr;
225 if ((u_char *)(rh + 1) > ep) {
229 len = (ntohs(rh->rh_len) + 1) * 4;
230 flags = ntohs(rh->rh_flags);
231 cnt = (flags >> 8) & 0x1f;
232 switch (flags & 0xff) {
234 sr = (struct rtcp_sr *)(rh + 1);
236 if (len != cnt * sizeof(*rr) + sizeof(*sr) + sizeof(*rh))
237 printf(" [%d]", len);
239 printf(" %u", (u_int32_t)ntohl(rh->rh_ssrc));
240 if ((u_char *)(sr + 1) > ep) {
244 ts = (double)((u_int32_t)ntohl(sr->sr_ntp.upper)) +
245 ((double)((u_int32_t)ntohl(sr->sr_ntp.lower)) /
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);
253 if (len != cnt * sizeof(*rr) + sizeof(*rh))
254 printf(" [%d]", len);
255 rr = (struct rtcp_rr *)(rh + 1);
257 printf(" %u", (u_int32_t)ntohl(rh->rh_ssrc));
260 printf(" sdes %d", len);
262 printf(" %u", (u_int32_t)ntohl(rh->rh_ssrc));
266 printf(" bye %d", len);
268 printf(" %u", (u_int32_t)ntohl(rh->rh_ssrc));
272 printf(" type-0x%x %d", flags & 0xff, len);
279 if ((u_char *)(rr + 1) > ep) {
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);
295 static int udp_cksum(register const struct ip *ip,
296 register const struct udphdr *up,
310 register const u_int16_t *sp;
312 tlen = ntohs(ip->ip_len) - ((const char *)up-(const char*)ip);
314 /* pseudo-header.. */
315 phu.ph.len = htons(tlen);
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));
322 sum = sp[0]+sp[1]+sp[2]+sp[3]+sp[4]+sp[5];
324 sp = (const u_int16_t *)up;
326 for (i=0; i<(tlen&~1); i+= 2)
330 sum += htons( (*(const u_int8_t *)sp) << 8);
334 sum = (sum & 0xffff) + (sum >> 16);
341 static int udp6_cksum(const struct ip6_hdr *ip6, const struct udphdr *up,
345 register const u_int16_t *sp;
349 struct in6_addr ph_src;
350 struct in6_addr ph_dst;
358 tlen = ntohs(ip6->ip6_plen) + sizeof(struct ip6_hdr) -
359 ((const char *)up - (const char*)ip6);
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;
369 for (i = 0; i < sizeof(phu.pa) / sizeof(phu.pa[0]); i++)
372 sp = (const u_int16_t *)up;
374 for (i = 0; i < (tlen & ~1); i += 2)
378 sum += htons((*(const u_int8_t *)sp) << 8);
381 sum = (sum & 0xffff) + (sum >> 16);
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 #define RADIUS_PORT 1645
409 #define RADIUS_NEW_PORT 1812
410 #define RADIUS_ACCOUNTING_PORT 1646
411 #define RADIUS_NEW_ACCOUNTING_PORT 1813
414 #define RIPNG_PORT 521 /*XXX*/
415 #define DHCP6_SERV_PORT 546 /*XXX*/
416 #define DHCP6_CLI_PORT 547 /*XXX*/
420 udp_print(register const u_char *bp, u_int length,
421 register const u_char *bp2, int fragmented)
423 register const struct udphdr *up;
424 register const struct ip *ip;
425 register const u_char *cp;
426 register const u_char *ep = bp + length;
427 u_int16_t sport, dport, ulen;
429 register const struct ip6_hdr *ip6;
434 up = (struct udphdr *)bp;
435 ip = (struct ip *)bp2;
438 ip6 = (struct ip6_hdr *)bp2;
442 cp = (u_char *)(up + 1);
444 (void)printf("%s > %s: [|udp]",
445 ipaddr_string(&ip->ip_src), ipaddr_string(&ip->ip_dst));
448 if (length < sizeof(struct udphdr)) {
449 (void)printf("%s > %s: truncated-udp %d",
450 ipaddr_string(&ip->ip_src), ipaddr_string(&ip->ip_dst),
454 length -= sizeof(struct udphdr);
456 sport = ntohs(up->uh_sport);
457 dport = ntohs(up->uh_dport);
458 ulen = ntohs(up->uh_ulen);
460 (void)printf("%s > %s: truncated-udplength %d",
461 ipaddr_string(&ip->ip_src),
462 ipaddr_string(&ip->ip_dst),
467 register struct rpc_msg *rp;
468 enum msg_type direction;
470 switch (packettype) {
473 (void)printf("%s.%s > %s.%s:",
474 ipaddr_string(&ip->ip_src),
475 udpport_string(sport),
476 ipaddr_string(&ip->ip_dst),
477 udpport_string(dport));
478 vat_print((void *)(up + 1), length, up);
482 (void)printf("%s.%s > %s.%s:",
483 ipaddr_string(&ip->ip_src),
484 udpport_string(sport),
485 ipaddr_string(&ip->ip_dst),
486 udpport_string(dport));
487 wb_print((void *)(up + 1), length);
491 rp = (struct rpc_msg *)(up + 1);
492 direction = (enum msg_type)ntohl(rp->rm_direction);
493 if (direction == CALL)
494 sunrpcrequest_print((u_char *)rp, length,
497 nfsreply_print((u_char *)rp, length,
498 (u_char *)ip); /*XXX*/
502 (void)printf("%s.%s > %s.%s:",
503 ipaddr_string(&ip->ip_src),
504 udpport_string(sport),
505 ipaddr_string(&ip->ip_dst),
506 udpport_string(dport));
507 rtp_print((void *)(up + 1), length, up);
511 (void)printf("%s.%s > %s.%s:",
512 ipaddr_string(&ip->ip_src),
513 udpport_string(sport),
514 ipaddr_string(&ip->ip_dst),
515 udpport_string(dport));
517 cp = rtcp_print(cp, ep);
521 (void)printf("%s.%s > %s.%s:",
522 ipaddr_string(&ip->ip_src),
523 udpport_string(sport),
524 ipaddr_string(&ip->ip_dst),
525 udpport_string(dport));
526 snmp_print((const u_char *)(up + 1), length);
530 (void)printf("%s.%s > %s.%s:",
531 ipaddr_string(&ip->ip_src),
532 udpport_string(sport),
533 ipaddr_string(&ip->ip_dst),
534 udpport_string(dport));
535 cnfp_print(cp, length, (const u_char *)ip);
542 register struct rpc_msg *rp;
543 enum msg_type direction;
545 rp = (struct rpc_msg *)(up + 1);
546 if (TTEST(rp->rm_direction)) {
547 direction = (enum msg_type)ntohl(rp->rm_direction);
548 if (dport == NFS_PORT && direction == CALL) {
549 nfsreq_print((u_char *)rp, length,
553 if (sport == NFS_PORT && direction == REPLY) {
554 nfsreply_print((u_char *)rp, length,
559 if (dport == SUNRPC_PORT && direction == CALL) {
560 sunrpcrequest_print((u_char *)rp, length, (u_char *)ip);
565 if (TTEST(((struct LAP *)cp)->type) &&
566 ((struct LAP *)cp)->type == lapDDP &&
567 (atalk_port(sport) || atalk_port(dport))) {
569 fputs("kip ", stdout);
570 llap_print(cp, length);
575 (void)printf("%s.%s > %s.%s:",
576 ipaddr_string(&ip->ip_src), udpport_string(sport),
577 ipaddr_string(&ip->ip_dst), udpport_string(dport));
581 if (ip6->ip6_nxt == IPPROTO_UDP) {
582 (void)printf("%s.%s > %s.%s: ",
583 ip6addr_string(&ip6->ip6_src),
584 udpport_string(sport),
585 ip6addr_string(&ip6->ip6_dst),
586 udpport_string(dport));
588 (void)printf("%s > %s: ",
589 udpport_string(sport), udpport_string(dport));
594 if (ip->ip_p == IPPROTO_UDP) {
595 (void)printf("%s.%s > %s.%s: ",
596 ipaddr_string(&ip->ip_src),
597 udpport_string(sport),
598 ipaddr_string(&ip->ip_dst),
599 udpport_string(dport));
601 (void)printf("%s > %s: ",
602 udpport_string(sport), udpport_string(dport));
607 if (IP_V(ip) == 4 && vflag && !fragmented) {
608 int sum = up->uh_sum;
610 (void)printf(" [no cksum]");
611 } else if (TTEST2(cp[0], length)) {
612 sum = udp_cksum(ip, up, length);
614 (void)printf(" [bad udp cksum %x!]", sum);
616 (void)printf(" [udp sum ok]");
620 if (IP_V(ip) == 6 && ip6->ip6_plen && vflag && !fragmented) {
621 int sum = up->uh_sum;
622 /* for IPv6, UDP checksum is mandatory */
623 if (TTEST2(cp[0], length)) {
624 sum = udp6_cksum(ip6, up, length);
626 (void)printf(" [bad udp cksum %x!]", sum);
628 (void)printf(" [udp sum ok]");
634 #define ISPORT(p) (dport == (p) || sport == (p))
635 if (ISPORT(NAMESERVER_PORT))
636 ns_print((const u_char *)(up + 1), length);
637 else if (ISPORT(TIMED_PORT))
638 timed_print((const u_char *)(up + 1), length);
639 else if (ISPORT(TFTP_PORT))
640 tftp_print((const u_char *)(up + 1), length);
641 else if (ISPORT(IPPORT_BOOTPC) || ISPORT(IPPORT_BOOTPS))
642 bootp_print((const u_char *)(up + 1), length,
644 else if (ISPORT(RIP_PORT))
645 rip_print((const u_char *)(up + 1), length);
646 else if (ISPORT(ISAKMP_PORT))
647 isakmp_print((const u_char *)(up + 1), length, bp2);
649 else if (ISPORT(ISAKMP_PORT_USER1) || ISPORT(ISAKMP_PORT_USER2))
650 isakmp_print((const u_char *)(up + 1), length, bp2);
652 else if (ISPORT(SNMP_PORT) || ISPORT(SNMPTRAP_PORT))
653 snmp_print((const u_char *)(up + 1), length);
654 else if (ISPORT(NTP_PORT))
655 ntp_print((const u_char *)(up + 1), length);
656 else if (ISPORT(KERBEROS_PORT) || ISPORT(KERBEROS_SEC_PORT))
657 krb_print((const void *)(up + 1), length);
658 else if (ISPORT(L2TP_PORT))
659 l2tp_print((const u_char *)(up + 1), length);
660 else if (ISPORT(NETBIOS_NS_PORT)) {
661 nbt_udp137_print((const u_char *)(up + 1), length);
663 else if (ISPORT(NETBIOS_DGRAM_PORT)) {
664 nbt_udp138_print((const u_char *)(up + 1), length);
666 else if (dport == 3456)
667 vat_print((const void *)(up + 1), length, up);
669 * Since there are 10 possible ports to check, I think
670 * a <> test would be more efficient
672 else if ((sport >= RX_PORT_LOW && sport <= RX_PORT_HIGH) ||
673 (dport >= RX_PORT_LOW && dport <= RX_PORT_HIGH))
674 rx_print((const void *)(up + 1), length, sport, dport,
677 else if (ISPORT(RIPNG_PORT))
678 ripng_print((const u_char *)(up + 1), length);
679 else if (ISPORT(DHCP6_SERV_PORT) || ISPORT(DHCP6_CLI_PORT)) {
680 dhcp6_print((const u_char *)(up + 1), length,
685 * Kludge in test for whiteboard packets.
687 else if (dport == 4567)
688 wb_print((const void *)(up + 1), length);
689 else if (ISPORT(CISCO_AUTORP_PORT))
690 cisco_autorp_print((const void *)(up + 1), length);
691 else if (ISPORT(RADIUS_PORT) ||
692 ISPORT(RADIUS_NEW_PORT) ||
693 ISPORT(RADIUS_ACCOUNTING_PORT) ||
694 ISPORT(RADIUS_NEW_ACCOUNTING_PORT) )
695 radius_print((const u_char *)(up+1), length);
697 (void)printf(" udp %u",
698 (u_int32_t)(ulen - sizeof(*up)));
701 (void)printf(" udp %u", (u_int32_t)(ulen - sizeof(*up)));