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 * $FreeBSD$ 22 */ 23 24 #ifndef lint 25 static const char rcsid[] = 26 "@(#) $Header: /tcpdump/master/tcpdump/print-udp.c,v 1.70 1999/12/22 06:27:23 itojun 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> 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 44 #ifdef NOERROR 45 #undef NOERROR /* Solaris sucks */ 46 #endif 47 #ifdef T_UNSPEC 48 #undef T_UNSPEC /* SINIX does too */ 49 #endif 50 #include <arpa/nameser.h> 51 #ifdef SEGSIZE 52 #undef SEGSIZE 53 #endif 54 #include <arpa/tftp.h> 55 56 #include <rpc/rpc.h> 57 58 #include <stdio.h> 59 60 #ifdef INET6 61 #include <netinet/ip6.h> 62 #endif 63 64 #include "interface.h" 65 #include "addrtoname.h" 66 #include "appletalk.h" 67 68 #include "nfs.h" 69 #include "bootp.h" 70 71 struct rtcphdr { 72 u_short rh_flags; /* T:2 P:1 CNT:5 PT:8 */ 73 u_short rh_len; /* length of message (in words) */ 74 u_int rh_ssrc; /* synchronization src id */ 75 }; 76 77 typedef struct { 78 u_int upper; /* more significant 32 bits */ 79 u_int lower; /* less significant 32 bits */ 80 } ntp64; 81 82 /* 83 * Sender report. 84 */ 85 struct rtcp_sr { 86 ntp64 sr_ntp; /* 64-bit ntp timestamp */ 87 u_int sr_ts; /* reference media timestamp */ 88 u_int sr_np; /* no. packets sent */ 89 u_int sr_nb; /* no. bytes sent */ 90 }; 91 92 /* 93 * Receiver report. 94 * Time stamps are middle 32-bits of ntp timestamp. 95 */ 96 struct rtcp_rr { 97 u_int rr_srcid; /* sender being reported */ 98 u_int rr_nl; /* no. packets lost */ 99 u_int rr_ls; /* extended last seq number received */ 100 u_int rr_dv; /* jitter (delay variance) */ 101 u_int rr_lsr; /* orig. ts from last rr from this src */ 102 u_int rr_dlsr; /* time from recpt of last rr to xmit time */ 103 }; 104 105 /*XXX*/ 106 #define RTCP_PT_SR 200 107 #define RTCP_PT_RR 201 108 #define RTCP_PT_SDES 202 109 #define RTCP_SDES_CNAME 1 110 #define RTCP_SDES_NAME 2 111 #define RTCP_SDES_EMAIL 3 112 #define RTCP_SDES_PHONE 4 113 #define RTCP_SDES_LOC 5 114 #define RTCP_SDES_TOOL 6 115 #define RTCP_SDES_NOTE 7 116 #define RTCP_SDES_PRIV 8 117 #define RTCP_PT_BYE 203 118 #define RTCP_PT_APP 204 119 120 static void 121 vat_print(const void *hdr, u_int len, register const struct udphdr *up) 122 { 123 /* vat/vt audio */ 124 u_int ts = *(u_short *)hdr; 125 if ((ts & 0xf060) != 0) { 126 /* probably vt */ 127 (void)printf(" udp/vt %u %d / %d", 128 (u_int32_t)(ntohs(up->uh_ulen) - sizeof(*up)), 129 ts & 0x3ff, ts >> 10); 130 } else { 131 /* probably vat */ 132 u_int i0 = ntohl(((u_int *)hdr)[0]); 133 u_int i1 = ntohl(((u_int *)hdr)[1]); 134 printf(" udp/vat %u c%d %u%s", 135 (u_int32_t)(ntohs(up->uh_ulen) - sizeof(*up) - 8), 136 i0 & 0xffff, 137 i1, i0 & 0x800000? "*" : ""); 138 /* audio format */ 139 if (i0 & 0x1f0000) 140 printf(" f%d", (i0 >> 16) & 0x1f); 141 if (i0 & 0x3f000000) 142 printf(" s%d", (i0 >> 24) & 0x3f); 143 } 144 } 145 146 static void 147 rtp_print(const void *hdr, u_int len, register const struct udphdr *up) 148 { 149 /* rtp v1 or v2 */ 150 u_int *ip = (u_int *)hdr; 151 u_int hasopt, hasext, contype, hasmarker; 152 u_int i0 = ntohl(((u_int *)hdr)[0]); 153 u_int i1 = ntohl(((u_int *)hdr)[1]); 154 u_int dlen = ntohs(up->uh_ulen) - sizeof(*up) - 8; 155 const char * ptype; 156 157 ip += 2; 158 len >>= 2; 159 len -= 2; 160 hasopt = 0; 161 hasext = 0; 162 if ((i0 >> 30) == 1) { 163 /* rtp v1 */ 164 hasopt = i0 & 0x800000; 165 contype = (i0 >> 16) & 0x3f; 166 hasmarker = i0 & 0x400000; 167 ptype = "rtpv1"; 168 } else { 169 /* rtp v2 */ 170 hasext = i0 & 0x10000000; 171 contype = (i0 >> 16) & 0x7f; 172 hasmarker = i0 & 0x800000; 173 dlen -= 4; 174 ptype = "rtp"; 175 ip += 1; 176 len -= 1; 177 } 178 printf(" udp/%s %d c%d %s%s %d %u", 179 ptype, 180 dlen, 181 contype, 182 (hasopt || hasext)? "+" : "", 183 hasmarker? "*" : "", 184 i0 & 0xffff, 185 i1); 186 if (vflag) { 187 printf(" %u", i1); 188 if (hasopt) { 189 u_int i2, optlen; 190 do { 191 i2 = ip[0]; 192 optlen = (i2 >> 16) & 0xff; 193 if (optlen == 0 || optlen > len) { 194 printf(" !opt"); 195 return; 196 } 197 ip += optlen; 198 len -= optlen; 199 } while ((int)i2 >= 0); 200 } 201 if (hasext) { 202 u_int i2, extlen; 203 i2 = ip[0]; 204 extlen = (i2 & 0xffff) + 1; 205 if (extlen > len) { 206 printf(" !ext"); 207 return; 208 } 209 ip += extlen; 210 } 211 if (contype == 0x1f) /*XXX H.261 */ 212 printf(" 0x%04x", ip[0] >> 16); 213 } 214 } 215 216 static const u_char * 217 rtcp_print(const u_char *hdr, const u_char *ep) 218 { 219 /* rtp v2 control (rtcp) */ 220 struct rtcp_rr *rr = 0; 221 struct rtcp_sr *sr; 222 struct rtcphdr *rh = (struct rtcphdr *)hdr; 223 u_int len; 224 u_short flags; 225 int cnt; 226 double ts, dts; 227 if ((u_char *)(rh + 1) > ep) { 228 printf(" [|rtcp]"); 229 return (ep); 230 } 231 len = (ntohs(rh->rh_len) + 1) * 4; 232 flags = ntohs(rh->rh_flags); 233 cnt = (flags >> 8) & 0x1f; 234 switch (flags & 0xff) { 235 case RTCP_PT_SR: 236 sr = (struct rtcp_sr *)(rh + 1); 237 printf(" sr"); 238 if (len != cnt * sizeof(*rr) + sizeof(*sr) + sizeof(*rh)) 239 printf(" [%d]", len); 240 if (vflag) 241 printf(" %u", (u_int32_t)ntohl(rh->rh_ssrc)); 242 if ((u_char *)(sr + 1) > ep) { 243 printf(" [|rtcp]"); 244 return (ep); 245 } 246 ts = (double)((u_int32_t)ntohl(sr->sr_ntp.upper)) + 247 ((double)((u_int32_t)ntohl(sr->sr_ntp.lower)) / 248 4294967296.0); 249 printf(" @%.2f %u %up %ub", ts, (u_int32_t)ntohl(sr->sr_ts), 250 (u_int32_t)ntohl(sr->sr_np), (u_int32_t)ntohl(sr->sr_nb)); 251 rr = (struct rtcp_rr *)(sr + 1); 252 break; 253 case RTCP_PT_RR: 254 printf(" rr"); 255 if (len != cnt * sizeof(*rr) + sizeof(*rh)) 256 printf(" [%d]", len); 257 rr = (struct rtcp_rr *)(rh + 1); 258 if (vflag) 259 printf(" %u", (u_int32_t)ntohl(rh->rh_ssrc)); 260 break; 261 case RTCP_PT_SDES: 262 printf(" sdes %d", len); 263 if (vflag) 264 printf(" %u", (u_int32_t)ntohl(rh->rh_ssrc)); 265 cnt = 0; 266 break; 267 case RTCP_PT_BYE: 268 printf(" bye %d", len); 269 if (vflag) 270 printf(" %u", (u_int32_t)ntohl(rh->rh_ssrc)); 271 cnt = 0; 272 break; 273 default: 274 printf(" type-0x%x %d", flags & 0xff, len); 275 cnt = 0; 276 break; 277 } 278 if (cnt > 1) 279 printf(" c%d", cnt); 280 while (--cnt >= 0) { 281 if ((u_char *)(rr + 1) > ep) { 282 printf(" [|rtcp]"); 283 return (ep); 284 } 285 if (vflag) 286 printf(" %u", (u_int32_t)ntohl(rr->rr_srcid)); 287 ts = (double)((u_int32_t)ntohl(rr->rr_lsr)) / 65536.; 288 dts = (double)((u_int32_t)ntohl(rr->rr_dlsr)) / 65536.; 289 printf(" %ul %us %uj @%.2f+%.2f", 290 (u_int32_t)ntohl(rr->rr_nl) & 0x00ffffff, 291 (u_int32_t)ntohl(rr->rr_ls), 292 (u_int32_t)ntohl(rr->rr_dv), ts, dts); 293 } 294 return (hdr + len); 295 } 296 297 /* XXX probably should use getservbyname() and cache answers */ 298 #define TFTP_PORT 69 /*XXX*/ 299 #define KERBEROS_PORT 88 /*XXX*/ 300 #define SUNRPC_PORT 111 /*XXX*/ 301 #define SNMP_PORT 161 /*XXX*/ 302 #define NTP_PORT 123 /*XXX*/ 303 #define SNMPTRAP_PORT 162 /*XXX*/ 304 #define ISAKMP_PORT 500 /*XXX*/ 305 #define RIP_PORT 520 /*XXX*/ 306 #define KERBEROS_SEC_PORT 750 /*XXX*/ 307 #define L2TP_PORT 1701 /*XXX*/ 308 #define ISAKMP_PORT_USER1 7500 /*??? - nonstandard*/ 309 #define ISAKMP_PORT_USER2 8500 /*??? - nonstandard*/ 310 #define RX_PORT_LOW 7000 /*XXX*/ 311 #define RX_PORT_HIGH 7009 /*XXX*/ 312 #define NETBIOS_NS_PORT 137 313 #define NETBIOS_DGRAM_PORT 138 314 #define CISCO_AUTORP_PORT 496 /*XXX*/ 315 316 #ifdef INET6 317 #define RIPNG_PORT 521 /*XXX*/ 318 #define DHCP6_SERV_PORT 546 /*XXX*/ 319 #define DHCP6_CLI_PORT 547 /*XXX*/ 320 #endif 321 322 void 323 udp_print(register const u_char *bp, u_int length, register const u_char *bp2) 324 { 325 register const struct udphdr *up; 326 register const struct ip *ip; 327 register const u_char *cp; 328 register const u_char *ep = bp + length; 329 u_short sport, dport, ulen; 330 #ifdef INET6 331 register const struct ip6_hdr *ip6; 332 #endif 333 334 if (ep > snapend) 335 ep = snapend; 336 up = (struct udphdr *)bp; 337 ip = (struct ip *)bp2; 338 #ifdef INET6 339 if (ip->ip_v == 6) 340 ip6 = (struct ip6_hdr *)bp2; 341 else 342 ip6 = NULL; 343 #endif /*INET6*/ 344 cp = (u_char *)(up + 1); 345 if (cp > snapend) { 346 (void)printf("%s > %s: [|udp]", 347 ipaddr_string(&ip->ip_src), ipaddr_string(&ip->ip_dst)); 348 return; 349 } 350 if (length < sizeof(struct udphdr)) { 351 (void)printf("%s > %s: truncated-udp %d", 352 ipaddr_string(&ip->ip_src), ipaddr_string(&ip->ip_dst), 353 length); 354 return; 355 } 356 length -= sizeof(struct udphdr); 357 358 sport = ntohs(up->uh_sport); 359 dport = ntohs(up->uh_dport); 360 ulen = ntohs(up->uh_ulen); 361 if (packettype) { 362 register struct rpc_msg *rp; 363 enum msg_type direction; 364 365 switch (packettype) { 366 367 case PT_VAT: 368 (void)printf("%s.%s > %s.%s:", 369 ipaddr_string(&ip->ip_src), 370 udpport_string(sport), 371 ipaddr_string(&ip->ip_dst), 372 udpport_string(dport)); 373 vat_print((void *)(up + 1), length, up); 374 break; 375 376 case PT_WB: 377 (void)printf("%s.%s > %s.%s:", 378 ipaddr_string(&ip->ip_src), 379 udpport_string(sport), 380 ipaddr_string(&ip->ip_dst), 381 udpport_string(dport)); 382 wb_print((void *)(up + 1), length); 383 break; 384 385 case PT_RPC: 386 rp = (struct rpc_msg *)(up + 1); 387 direction = (enum msg_type)ntohl(rp->rm_direction); 388 if (direction == CALL) 389 sunrpcrequest_print((u_char *)rp, length, 390 (u_char *)ip); 391 else 392 nfsreply_print((u_char *)rp, length, 393 (u_char *)ip); /*XXX*/ 394 break; 395 396 case PT_RTP: 397 (void)printf("%s.%s > %s.%s:", 398 ipaddr_string(&ip->ip_src), 399 udpport_string(sport), 400 ipaddr_string(&ip->ip_dst), 401 udpport_string(dport)); 402 rtp_print((void *)(up + 1), length, up); 403 break; 404 405 case PT_RTCP: 406 (void)printf("%s.%s > %s.%s:", 407 ipaddr_string(&ip->ip_src), 408 udpport_string(sport), 409 ipaddr_string(&ip->ip_dst), 410 udpport_string(dport)); 411 while (cp < ep) 412 cp = rtcp_print(cp, ep); 413 break; 414 415 case PT_SNMP: 416 (void)printf("%s.%s > %s.%s:", 417 ipaddr_string(&ip->ip_src), 418 udpport_string(sport), 419 ipaddr_string(&ip->ip_dst), 420 udpport_string(dport)); 421 snmp_print((const u_char *)(up + 1), length); 422 break; 423 } 424 return; 425 } 426 427 if (!qflag) { 428 register struct rpc_msg *rp; 429 enum msg_type direction; 430 431 rp = (struct rpc_msg *)(up + 1); 432 if (TTEST(rp->rm_direction)) { 433 direction = (enum msg_type)ntohl(rp->rm_direction); 434 if (dport == NFS_PORT && direction == CALL) { 435 nfsreq_print((u_char *)rp, length, 436 (u_char *)ip); 437 return; 438 } 439 if (sport == NFS_PORT && direction == REPLY) { 440 nfsreply_print((u_char *)rp, length, 441 (u_char *)ip); 442 return; 443 } 444 #ifdef notdef 445 if (dport == SUNRPC_PORT && direction == CALL) { 446 sunrpcrequest_print((u_char *)rp, length, (u_char *)ip); 447 return; 448 } 449 #endif 450 } 451 if (TTEST(((struct LAP *)cp)->type) && 452 ((struct LAP *)cp)->type == lapDDP && 453 (atalk_port(sport) || atalk_port(dport))) { 454 if (vflag) 455 fputs("kip ", stdout); 456 atalk_print(cp, length); 457 return; 458 } 459 } 460 #if 0 461 (void)printf("%s.%s > %s.%s:", 462 ipaddr_string(&ip->ip_src), udpport_string(sport), 463 ipaddr_string(&ip->ip_dst), udpport_string(dport)); 464 #else 465 #ifdef INET6 466 if (ip6) { 467 if (ip6->ip6_nxt == IPPROTO_UDP) { 468 (void)printf("%s.%s > %s.%s: ", 469 ip6addr_string(&ip6->ip6_src), 470 udpport_string(sport), 471 ip6addr_string(&ip6->ip6_dst), 472 udpport_string(dport)); 473 } else { 474 (void)printf("%s > %s: ", 475 udpport_string(sport), udpport_string(dport)); 476 } 477 } else 478 #endif /*INET6*/ 479 { 480 if (ip->ip_p == IPPROTO_UDP) { 481 (void)printf("%s.%s > %s.%s: ", 482 ipaddr_string(&ip->ip_src), 483 udpport_string(sport), 484 ipaddr_string(&ip->ip_dst), 485 udpport_string(dport)); 486 } else { 487 (void)printf("%s > %s: ", 488 udpport_string(sport), udpport_string(dport)); 489 } 490 } 491 #endif 492 493 if (!qflag) { 494 #define ISPORT(p) (dport == (p) || sport == (p)) 495 if (ISPORT(NAMESERVER_PORT)) 496 ns_print((const u_char *)(up + 1), length); 497 else if (ISPORT(TFTP_PORT)) 498 tftp_print((const u_char *)(up + 1), length); 499 else if (ISPORT(IPPORT_BOOTPC) || ISPORT(IPPORT_BOOTPS)) 500 bootp_print((const u_char *)(up + 1), length, 501 sport, dport); 502 else if (ISPORT(RIP_PORT)) 503 rip_print((const u_char *)(up + 1), length); 504 else if (ISPORT(ISAKMP_PORT)) 505 isakmp_print((const u_char *)(up + 1), length, bp2); 506 #if 1 /*???*/ 507 else if (ISPORT(ISAKMP_PORT_USER1) || ISPORT(ISAKMP_PORT_USER2)) 508 isakmp_print((const u_char *)(up + 1), length, bp2); 509 #endif 510 else if (ISPORT(SNMP_PORT) || ISPORT(SNMPTRAP_PORT)) 511 snmp_print((const u_char *)(up + 1), length); 512 else if (ISPORT(NTP_PORT)) 513 ntp_print((const u_char *)(up + 1), length); 514 else if (ISPORT(KERBEROS_PORT) || ISPORT(KERBEROS_SEC_PORT)) 515 krb_print((const void *)(up + 1), length); 516 else if (ISPORT(L2TP_PORT)) 517 l2tp_print((const u_char *)(up + 1), length); 518 else if (ISPORT(NETBIOS_NS_PORT)) { 519 nbt_udp137_print((const u_char *)(up + 1), length); 520 } 521 else if (ISPORT(NETBIOS_DGRAM_PORT)) { 522 nbt_udp138_print((const u_char *)(up + 1), length); 523 } 524 else if (dport == 3456) 525 vat_print((const void *)(up + 1), length, up); 526 /* 527 * Since there are 10 possible ports to check, I think 528 * a <> test would be more efficient 529 */ 530 else if ((sport >= RX_PORT_LOW && sport <= RX_PORT_HIGH) || 531 (dport >= RX_PORT_LOW && dport <= RX_PORT_HIGH)) 532 rx_print((const void *)(up + 1), length, sport, dport, 533 (u_char *) ip); 534 #ifdef INET6 535 else if (ISPORT(RIPNG_PORT)) 536 ripng_print((const u_char *)(up + 1), length); 537 else if (ISPORT(DHCP6_SERV_PORT) || ISPORT(DHCP6_CLI_PORT)) { 538 dhcp6_print((const u_char *)(up + 1), length, 539 sport, dport); 540 } 541 #endif /*INET6*/ 542 /* 543 * Kludge in test for whiteboard packets. 544 */ 545 else if (dport == 4567) 546 wb_print((const void *)(up + 1), length); 547 else if (ISPORT(CISCO_AUTORP_PORT)) 548 cisco_autorp_print((const void *)(up + 1), length); 549 else 550 (void)printf(" udp %u", 551 (u_int32_t)(ulen - sizeof(*up))); 552 #undef ISPORT 553 } else 554 (void)printf(" udp %u", (u_int32_t)(ulen - sizeof(*up))); 555 } 556