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[] _U_ = 26 "@(#) $Header: /tcpdump/master/tcpdump/print-domain.c,v 1.89.2.8 2007/02/13 19:19:27 guy Exp $ (LBL)"; 27 #endif 28 29 #ifdef HAVE_CONFIG_H 30 #include "config.h" 31 #endif 32 33 #include <tcpdump-stdinc.h> 34 35 #include "nameser.h" 36 37 #include <stdio.h> 38 #include <string.h> 39 40 #include "interface.h" 41 #include "addrtoname.h" 42 #include "extract.h" /* must come after interface.h */ 43 44 static const char *ns_ops[] = { 45 "", " inv_q", " stat", " op3", " notify", " update", " op6", " op7", 46 " op8", " updataA", " updateD", " updateDA", 47 " updateM", " updateMA", " zoneInit", " zoneRef", 48 }; 49 50 static const char *ns_resp[] = { 51 "", " FormErr", " ServFail", " NXDomain", 52 " NotImp", " Refused", " YXDomain", " YXRRSet", 53 " NXRRSet", " NotAuth", " NotZone", " Resp11", 54 " Resp12", " Resp13", " Resp14", " NoChange", 55 }; 56 57 /* skip over a domain name */ 58 static const u_char * 59 ns_nskip(register const u_char *cp) 60 { 61 register u_char i; 62 63 if (!TTEST2(*cp, 1)) 64 return (NULL); 65 i = *cp++; 66 while (i) { 67 if ((i & INDIR_MASK) == INDIR_MASK) 68 return (cp + 1); 69 if ((i & INDIR_MASK) == EDNS0_MASK) { 70 int bitlen, bytelen; 71 72 if ((i & ~INDIR_MASK) != EDNS0_ELT_BITLABEL) 73 return(NULL); /* unknown ELT */ 74 if (!TTEST2(*cp, 1)) 75 return (NULL); 76 if ((bitlen = *cp++) == 0) 77 bitlen = 256; 78 bytelen = (bitlen + 7) / 8; 79 cp += bytelen; 80 } else 81 cp += i; 82 if (!TTEST2(*cp, 1)) 83 return (NULL); 84 i = *cp++; 85 } 86 return (cp); 87 } 88 89 /* print a <domain-name> */ 90 static const u_char * 91 blabel_print(const u_char *cp) 92 { 93 int bitlen, slen, b; 94 const u_char *bitp, *lim; 95 char tc; 96 97 if (!TTEST2(*cp, 1)) 98 return(NULL); 99 if ((bitlen = *cp) == 0) 100 bitlen = 256; 101 slen = (bitlen + 3) / 4; 102 lim = cp + 1 + slen; 103 104 /* print the bit string as a hex string */ 105 printf("\\[x"); 106 for (bitp = cp + 1, b = bitlen; bitp < lim && b > 7; b -= 8, bitp++) { 107 TCHECK(*bitp); 108 printf("%02x", *bitp); 109 } 110 if (b > 4) { 111 TCHECK(*bitp); 112 tc = *bitp++; 113 printf("%02x", tc & (0xff << (8 - b))); 114 } else if (b > 0) { 115 TCHECK(*bitp); 116 tc = *bitp++; 117 printf("%1x", ((tc >> 4) & 0x0f) & (0x0f << (4 - b))); 118 } 119 printf("/%d]", bitlen); 120 return lim; 121 trunc: 122 printf(".../%d]", bitlen); 123 return NULL; 124 } 125 126 static int 127 labellen(const u_char *cp) 128 { 129 register u_int i; 130 131 if (!TTEST2(*cp, 1)) 132 return(-1); 133 i = *cp; 134 if ((i & INDIR_MASK) == EDNS0_MASK) { 135 int bitlen, elt; 136 if ((elt = (i & ~INDIR_MASK)) != EDNS0_ELT_BITLABEL) { 137 printf("<ELT %d>", elt); 138 return(-1); 139 } 140 if (!TTEST2(*(cp + 1), 1)) 141 return(-1); 142 if ((bitlen = *(cp + 1)) == 0) 143 bitlen = 256; 144 return(((bitlen + 7) / 8) + 1); 145 } else 146 return(i); 147 } 148 149 static const u_char * 150 ns_nprint(register const u_char *cp, register const u_char *bp) 151 { 152 register u_int i, l; 153 register const u_char *rp = NULL; 154 register int compress = 0; 155 int chars_processed; 156 int elt; 157 int data_size = snapend - bp; 158 159 if ((l = labellen(cp)) == (u_int)-1) 160 return(NULL); 161 if (!TTEST2(*cp, 1)) 162 return(NULL); 163 chars_processed = 1; 164 if (((i = *cp++) & INDIR_MASK) != INDIR_MASK) { 165 compress = 0; 166 rp = cp + l; 167 } 168 169 if (i != 0) 170 while (i && cp < snapend) { 171 if ((i & INDIR_MASK) == INDIR_MASK) { 172 if (!compress) { 173 rp = cp + 1; 174 compress = 1; 175 } 176 if (!TTEST2(*cp, 1)) 177 return(NULL); 178 cp = bp + (((i << 8) | *cp) & 0x3fff); 179 if ((l = labellen(cp)) == (u_int)-1) 180 return(NULL); 181 if (!TTEST2(*cp, 1)) 182 return(NULL); 183 i = *cp++; 184 chars_processed++; 185 186 /* 187 * If we've looked at every character in 188 * the message, this pointer will make 189 * us look at some character again, 190 * which means we're looping. 191 */ 192 if (chars_processed >= data_size) { 193 printf("<LOOP>"); 194 return (NULL); 195 } 196 continue; 197 } 198 if ((i & INDIR_MASK) == EDNS0_MASK) { 199 elt = (i & ~INDIR_MASK); 200 switch(elt) { 201 case EDNS0_ELT_BITLABEL: 202 if (blabel_print(cp) == NULL) 203 return (NULL); 204 break; 205 default: 206 /* unknown ELT */ 207 printf("<ELT %d>", elt); 208 return(NULL); 209 } 210 } else { 211 if (fn_printn(cp, l, snapend)) 212 return(NULL); 213 } 214 215 cp += l; 216 chars_processed += l; 217 putchar('.'); 218 if ((l = labellen(cp)) == (u_int)-1) 219 return(NULL); 220 if (!TTEST2(*cp, 1)) 221 return(NULL); 222 i = *cp++; 223 chars_processed++; 224 if (!compress) 225 rp += l + 1; 226 } 227 else 228 putchar('.'); 229 return (rp); 230 } 231 232 /* print a <character-string> */ 233 static const u_char * 234 ns_cprint(register const u_char *cp) 235 { 236 register u_int i; 237 238 if (!TTEST2(*cp, 1)) 239 return (NULL); 240 i = *cp++; 241 if (fn_printn(cp, i, snapend)) 242 return (NULL); 243 return (cp + i); 244 } 245 246 /* http://www.iana.org/assignments/dns-parameters */ 247 struct tok ns_type2str[] = { 248 { T_A, "A" }, /* RFC 1035 */ 249 { T_NS, "NS" }, /* RFC 1035 */ 250 { T_MD, "MD" }, /* RFC 1035 */ 251 { T_MF, "MF" }, /* RFC 1035 */ 252 { T_CNAME, "CNAME" }, /* RFC 1035 */ 253 { T_SOA, "SOA" }, /* RFC 1035 */ 254 { T_MB, "MB" }, /* RFC 1035 */ 255 { T_MG, "MG" }, /* RFC 1035 */ 256 { T_MR, "MR" }, /* RFC 1035 */ 257 { T_NULL, "NULL" }, /* RFC 1035 */ 258 { T_WKS, "WKS" }, /* RFC 1035 */ 259 { T_PTR, "PTR" }, /* RFC 1035 */ 260 { T_HINFO, "HINFO" }, /* RFC 1035 */ 261 { T_MINFO, "MINFO" }, /* RFC 1035 */ 262 { T_MX, "MX" }, /* RFC 1035 */ 263 { T_TXT, "TXT" }, /* RFC 1035 */ 264 { T_RP, "RP" }, /* RFC 1183 */ 265 { T_AFSDB, "AFSDB" }, /* RFC 1183 */ 266 { T_X25, "X25" }, /* RFC 1183 */ 267 { T_ISDN, "ISDN" }, /* RFC 1183 */ 268 { T_RT, "RT" }, /* RFC 1183 */ 269 { T_NSAP, "NSAP" }, /* RFC 1706 */ 270 { T_NSAP_PTR, "NSAP_PTR" }, 271 { T_SIG, "SIG" }, /* RFC 2535 */ 272 { T_KEY, "KEY" }, /* RFC 2535 */ 273 { T_PX, "PX" }, /* RFC 2163 */ 274 { T_GPOS, "GPOS" }, /* RFC 1712 */ 275 { T_AAAA, "AAAA" }, /* RFC 1886 */ 276 { T_LOC, "LOC" }, /* RFC 1876 */ 277 { T_NXT, "NXT" }, /* RFC 2535 */ 278 { T_EID, "EID" }, /* Nimrod */ 279 { T_NIMLOC, "NIMLOC" }, /* Nimrod */ 280 { T_SRV, "SRV" }, /* RFC 2782 */ 281 { T_ATMA, "ATMA" }, /* ATM Forum */ 282 { T_NAPTR, "NAPTR" }, /* RFC 2168, RFC 2915 */ 283 { T_KX, "KX" }, /* RFC 2230 */ 284 { T_CERT, "CERT" }, /* RFC 2538 */ 285 { T_A6, "A6" }, /* RFC 2874 */ 286 { T_DNAME, "DNAME" }, /* RFC 2672 */ 287 { T_SINK, "SINK" }, 288 { T_OPT, "OPT" }, /* RFC 2671 */ 289 { T_APL, "APL" }, /* RFC 3123 */ 290 { T_DS, "DS" }, /* RFC 4034 */ 291 { T_SSHFP, "SSHFP" }, /* RFC 4255 */ 292 { T_IPSECKEY, "IPSECKEY" }, /* RFC 4025 */ 293 { T_RRSIG, "RRSIG" }, /* RFC 4034 */ 294 { T_NSEC, "NSEC" }, /* RFC 4034 */ 295 { T_DNSKEY, "DNSKEY" }, /* RFC 4034 */ 296 { T_SPF, "SPF" }, /* RFC-schlitt-spf-classic-02.txt */ 297 { T_UINFO, "UINFO" }, 298 { T_UID, "UID" }, 299 { T_GID, "GID" }, 300 { T_UNSPEC, "UNSPEC" }, 301 { T_UNSPECA, "UNSPECA" }, 302 { T_TKEY, "TKEY" }, /* RFC 2930 */ 303 { T_TSIG, "TSIG" }, /* RFC 2845 */ 304 { T_IXFR, "IXFR" }, /* RFC 1995 */ 305 { T_AXFR, "AXFR" }, /* RFC 1035 */ 306 { T_MAILB, "MAILB" }, /* RFC 1035 */ 307 { T_MAILA, "MAILA" }, /* RFC 1035 */ 308 { T_ANY, "ANY" }, 309 { 0, NULL } 310 }; 311 312 struct tok ns_class2str[] = { 313 { C_IN, "IN" }, /* Not used */ 314 { C_CHAOS, "CHAOS" }, 315 { C_HS, "HS" }, 316 { C_ANY, "ANY" }, 317 { 0, NULL } 318 }; 319 320 /* print a query */ 321 static const u_char * 322 ns_qprint(register const u_char *cp, register const u_char *bp, int is_mdns) 323 { 324 register const u_char *np = cp; 325 register u_int i, class; 326 327 cp = ns_nskip(cp); 328 329 if (cp == NULL || !TTEST2(*cp, 4)) 330 return(NULL); 331 332 /* print the qtype */ 333 i = EXTRACT_16BITS(cp); 334 cp += 2; 335 printf(" %s", tok2str(ns_type2str, "Type%d", i)); 336 /* print the qclass (if it's not IN) */ 337 i = EXTRACT_16BITS(cp); 338 cp += 2; 339 if (is_mdns) 340 class = (i & ~C_QU); 341 else 342 class = i; 343 if (class != C_IN) 344 printf(" %s", tok2str(ns_class2str, "(Class %d)", class)); 345 if (is_mdns) { 346 if (i & C_QU) 347 printf(" (QU)"); 348 else 349 printf(" (QM)"); 350 } 351 352 fputs("? ", stdout); 353 cp = ns_nprint(np, bp); 354 return(cp ? cp + 4 : NULL); 355 } 356 357 /* print a reply */ 358 static const u_char * 359 ns_rprint(register const u_char *cp, register const u_char *bp, int is_mdns) 360 { 361 register u_int i, class, opt_flags = 0; 362 register u_short typ, len; 363 register const u_char *rp; 364 365 if (vflag) { 366 putchar(' '); 367 if ((cp = ns_nprint(cp, bp)) == NULL) 368 return NULL; 369 } else 370 cp = ns_nskip(cp); 371 372 if (cp == NULL || !TTEST2(*cp, 10)) 373 return (snapend); 374 375 /* print the type/qtype */ 376 typ = EXTRACT_16BITS(cp); 377 cp += 2; 378 /* print the class (if it's not IN and the type isn't OPT) */ 379 i = EXTRACT_16BITS(cp); 380 cp += 2; 381 if (is_mdns) 382 class = (i & ~C_CACHE_FLUSH); 383 else 384 class = i; 385 if (class != C_IN && typ != T_OPT) 386 printf(" %s", tok2str(ns_class2str, "(Class %d)", class)); 387 if (is_mdns) { 388 if (i & C_CACHE_FLUSH) 389 printf(" (Cache flush)"); 390 } 391 392 /* ignore ttl */ 393 cp += 2; 394 /* if T_OPT, save opt_flags */ 395 if (typ == T_OPT) 396 opt_flags = EXTRACT_16BITS(cp); 397 /* ignore rest of ttl */ 398 cp += 2; 399 400 len = EXTRACT_16BITS(cp); 401 cp += 2; 402 403 rp = cp + len; 404 405 printf(" %s", tok2str(ns_type2str, "Type%d", typ)); 406 if (rp > snapend) 407 return(NULL); 408 409 switch (typ) { 410 case T_A: 411 if (!TTEST2(*cp, sizeof(struct in_addr))) 412 return(NULL); 413 printf(" %s", ipaddr_string(cp)); 414 break; 415 416 case T_NS: 417 case T_CNAME: 418 case T_PTR: 419 #ifdef T_DNAME 420 case T_DNAME: 421 #endif 422 putchar(' '); 423 if (ns_nprint(cp, bp) == NULL) 424 return(NULL); 425 break; 426 427 case T_SOA: 428 if (!vflag) 429 break; 430 putchar(' '); 431 if ((cp = ns_nprint(cp, bp)) == NULL) 432 return(NULL); 433 putchar(' '); 434 if ((cp = ns_nprint(cp, bp)) == NULL) 435 return(NULL); 436 if (!TTEST2(*cp, 5 * 4)) 437 return(NULL); 438 printf(" %u", EXTRACT_32BITS(cp)); 439 cp += 4; 440 printf(" %u", EXTRACT_32BITS(cp)); 441 cp += 4; 442 printf(" %u", EXTRACT_32BITS(cp)); 443 cp += 4; 444 printf(" %u", EXTRACT_32BITS(cp)); 445 cp += 4; 446 printf(" %u", EXTRACT_32BITS(cp)); 447 cp += 4; 448 break; 449 case T_MX: 450 putchar(' '); 451 if (!TTEST2(*cp, 2)) 452 return(NULL); 453 if (ns_nprint(cp + 2, bp) == NULL) 454 return(NULL); 455 printf(" %d", EXTRACT_16BITS(cp)); 456 break; 457 458 case T_TXT: 459 while (cp < rp) { 460 printf(" \""); 461 cp = ns_cprint(cp); 462 if (cp == NULL) 463 return(NULL); 464 putchar('"'); 465 } 466 break; 467 468 case T_SRV: 469 putchar(' '); 470 if (!TTEST2(*cp, 6)) 471 return(NULL); 472 if (ns_nprint(cp + 6, bp) == NULL) 473 return(NULL); 474 printf(":%d %d %d", EXTRACT_16BITS(cp + 4), 475 EXTRACT_16BITS(cp), EXTRACT_16BITS(cp + 2)); 476 break; 477 478 #ifdef INET6 479 case T_AAAA: 480 if (!TTEST2(*cp, sizeof(struct in6_addr))) 481 return(NULL); 482 printf(" %s", ip6addr_string(cp)); 483 break; 484 485 case T_A6: 486 { 487 struct in6_addr a; 488 int pbit, pbyte; 489 490 if (!TTEST2(*cp, 1)) 491 return(NULL); 492 pbit = *cp; 493 pbyte = (pbit & ~7) / 8; 494 if (pbit > 128) { 495 printf(" %u(bad plen)", pbit); 496 break; 497 } else if (pbit < 128) { 498 if (!TTEST2(*(cp + 1), sizeof(a) - pbyte)) 499 return(NULL); 500 memset(&a, 0, sizeof(a)); 501 memcpy(&a.s6_addr[pbyte], cp + 1, sizeof(a) - pbyte); 502 printf(" %u %s", pbit, ip6addr_string(&a)); 503 } 504 if (pbit > 0) { 505 putchar(' '); 506 if (ns_nprint(cp + 1 + sizeof(a) - pbyte, bp) == NULL) 507 return(NULL); 508 } 509 break; 510 } 511 #endif /*INET6*/ 512 513 case T_OPT: 514 printf(" UDPsize=%u", class); 515 if (opt_flags & 0x8000) 516 printf(" OK"); 517 break; 518 519 case T_UNSPECA: /* One long string */ 520 if (!TTEST2(*cp, len)) 521 return(NULL); 522 if (fn_printn(cp, len, snapend)) 523 return(NULL); 524 break; 525 526 case T_TSIG: 527 { 528 if (cp + len > snapend) 529 return(NULL); 530 if (!vflag) 531 break; 532 putchar(' '); 533 if ((cp = ns_nprint(cp, bp)) == NULL) 534 return(NULL); 535 cp += 6; 536 if (!TTEST2(*cp, 2)) 537 return(NULL); 538 printf(" fudge=%u", EXTRACT_16BITS(cp)); 539 cp += 2; 540 if (!TTEST2(*cp, 2)) 541 return(NULL); 542 printf(" maclen=%u", EXTRACT_16BITS(cp)); 543 cp += 2 + EXTRACT_16BITS(cp); 544 if (!TTEST2(*cp, 2)) 545 return(NULL); 546 printf(" origid=%u", EXTRACT_16BITS(cp)); 547 cp += 2; 548 if (!TTEST2(*cp, 2)) 549 return(NULL); 550 printf(" error=%u", EXTRACT_16BITS(cp)); 551 cp += 2; 552 if (!TTEST2(*cp, 2)) 553 return(NULL); 554 printf(" otherlen=%u", EXTRACT_16BITS(cp)); 555 cp += 2; 556 } 557 } 558 return (rp); /* XXX This isn't always right */ 559 } 560 561 void 562 ns_print(register const u_char *bp, u_int length, int is_mdns) 563 { 564 register const HEADER *np; 565 register int qdcount, ancount, nscount, arcount; 566 register const u_char *cp; 567 u_int16_t b2; 568 569 np = (const HEADER *)bp; 570 TCHECK(*np); 571 /* get the byte-order right */ 572 qdcount = EXTRACT_16BITS(&np->qdcount); 573 ancount = EXTRACT_16BITS(&np->ancount); 574 nscount = EXTRACT_16BITS(&np->nscount); 575 arcount = EXTRACT_16BITS(&np->arcount); 576 577 if (DNS_QR(np)) { 578 /* this is a response */ 579 printf("%d%s%s%s%s%s%s", 580 EXTRACT_16BITS(&np->id), 581 ns_ops[DNS_OPCODE(np)], 582 ns_resp[DNS_RCODE(np)], 583 DNS_AA(np)? "*" : "", 584 DNS_RA(np)? "" : "-", 585 DNS_TC(np)? "|" : "", 586 DNS_AD(np)? "$" : ""); 587 588 if (qdcount != 1) 589 printf(" [%dq]", qdcount); 590 /* Print QUESTION section on -vv */ 591 cp = (const u_char *)(np + 1); 592 while (qdcount--) { 593 if (qdcount < EXTRACT_16BITS(&np->qdcount) - 1) 594 putchar(','); 595 if (vflag > 1) { 596 fputs(" q:", stdout); 597 if ((cp = ns_qprint(cp, bp, is_mdns)) == NULL) 598 goto trunc; 599 } else { 600 if ((cp = ns_nskip(cp)) == NULL) 601 goto trunc; 602 cp += 4; /* skip QTYPE and QCLASS */ 603 } 604 } 605 printf(" %d/%d/%d", ancount, nscount, arcount); 606 if (ancount--) { 607 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 608 goto trunc; 609 while (cp < snapend && ancount--) { 610 putchar(','); 611 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 612 goto trunc; 613 } 614 } 615 if (ancount > 0) 616 goto trunc; 617 /* Print NS and AR sections on -vv */ 618 if (vflag > 1) { 619 if (cp < snapend && nscount--) { 620 fputs(" ns:", stdout); 621 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 622 goto trunc; 623 while (cp < snapend && nscount--) { 624 putchar(','); 625 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 626 goto trunc; 627 } 628 } 629 if (nscount > 0) 630 goto trunc; 631 if (cp < snapend && arcount--) { 632 fputs(" ar:", stdout); 633 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 634 goto trunc; 635 while (cp < snapend && arcount--) { 636 putchar(','); 637 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 638 goto trunc; 639 } 640 } 641 if (arcount > 0) 642 goto trunc; 643 } 644 } 645 else { 646 /* this is a request */ 647 printf("%d%s%s%s", EXTRACT_16BITS(&np->id), ns_ops[DNS_OPCODE(np)], 648 DNS_RD(np) ? "+" : "", 649 DNS_CD(np) ? "%" : ""); 650 651 /* any weirdness? */ 652 b2 = EXTRACT_16BITS(((u_short *)np)+1); 653 if (b2 & 0x6cf) 654 printf(" [b2&3=0x%x]", b2); 655 656 if (DNS_OPCODE(np) == IQUERY) { 657 if (qdcount) 658 printf(" [%dq]", qdcount); 659 if (ancount != 1) 660 printf(" [%da]", ancount); 661 } 662 else { 663 if (ancount) 664 printf(" [%da]", ancount); 665 if (qdcount != 1) 666 printf(" [%dq]", qdcount); 667 } 668 if (nscount) 669 printf(" [%dn]", nscount); 670 if (arcount) 671 printf(" [%dau]", arcount); 672 673 cp = (const u_char *)(np + 1); 674 if (qdcount--) { 675 cp = ns_qprint(cp, (const u_char *)np, is_mdns); 676 if (!cp) 677 goto trunc; 678 while (cp < snapend && qdcount--) { 679 cp = ns_qprint((const u_char *)cp, 680 (const u_char *)np, 681 is_mdns); 682 if (!cp) 683 goto trunc; 684 } 685 } 686 if (qdcount > 0) 687 goto trunc; 688 689 /* Print remaining sections on -vv */ 690 if (vflag > 1) { 691 if (ancount--) { 692 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 693 goto trunc; 694 while (cp < snapend && ancount--) { 695 putchar(','); 696 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 697 goto trunc; 698 } 699 } 700 if (ancount > 0) 701 goto trunc; 702 if (cp < snapend && nscount--) { 703 fputs(" ns:", stdout); 704 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 705 goto trunc; 706 while (nscount-- && cp < snapend) { 707 putchar(','); 708 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 709 goto trunc; 710 } 711 } 712 if (nscount > 0) 713 goto trunc; 714 if (cp < snapend && arcount--) { 715 fputs(" ar:", stdout); 716 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 717 goto trunc; 718 while (cp < snapend && arcount--) { 719 putchar(','); 720 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 721 goto trunc; 722 } 723 } 724 if (arcount > 0) 725 goto trunc; 726 } 727 } 728 printf(" (%d)", length); 729 return; 730 731 trunc: 732 printf("[|domain]"); 733 return; 734 } 735