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[] _U_ = 24 "@(#) $Header: /tcpdump/master/tcpdump/print-domain.c,v 1.98 2007-12-09 01:40:32 guy Exp $ (LBL)"; 25 #endif 26 27 #ifdef HAVE_CONFIG_H 28 #include "config.h" 29 #endif 30 31 #include <tcpdump-stdinc.h> 32 33 #include "nameser.h" 34 35 #include <stdio.h> 36 #include <string.h> 37 38 #include "interface.h" 39 #include "addrtoname.h" 40 #include "extract.h" /* must come after interface.h */ 41 42 static const char *ns_ops[] = { 43 "", " inv_q", " stat", " op3", " notify", " update", " op6", " op7", 44 " op8", " updataA", " updateD", " updateDA", 45 " updateM", " updateMA", " zoneInit", " zoneRef", 46 }; 47 48 static const char *ns_resp[] = { 49 "", " FormErr", " ServFail", " NXDomain", 50 " NotImp", " Refused", " YXDomain", " YXRRSet", 51 " NXRRSet", " NotAuth", " NotZone", " Resp11", 52 " Resp12", " Resp13", " Resp14", " NoChange", 53 }; 54 55 /* skip over a domain name */ 56 static const u_char * 57 ns_nskip(register const u_char *cp) 58 { 59 register u_char i; 60 61 if (!TTEST2(*cp, 1)) 62 return (NULL); 63 i = *cp++; 64 while (i) { 65 if ((i & INDIR_MASK) == INDIR_MASK) 66 return (cp + 1); 67 if ((i & INDIR_MASK) == EDNS0_MASK) { 68 int bitlen, bytelen; 69 70 if ((i & ~INDIR_MASK) != EDNS0_ELT_BITLABEL) 71 return(NULL); /* unknown ELT */ 72 if (!TTEST2(*cp, 1)) 73 return (NULL); 74 if ((bitlen = *cp++) == 0) 75 bitlen = 256; 76 bytelen = (bitlen + 7) / 8; 77 cp += bytelen; 78 } else 79 cp += i; 80 if (!TTEST2(*cp, 1)) 81 return (NULL); 82 i = *cp++; 83 } 84 return (cp); 85 } 86 87 /* print a <domain-name> */ 88 static const u_char * 89 blabel_print(const u_char *cp) 90 { 91 int bitlen, slen, b; 92 const u_char *bitp, *lim; 93 char tc; 94 95 if (!TTEST2(*cp, 1)) 96 return(NULL); 97 if ((bitlen = *cp) == 0) 98 bitlen = 256; 99 slen = (bitlen + 3) / 4; 100 lim = cp + 1 + slen; 101 102 /* print the bit string as a hex string */ 103 printf("\\[x"); 104 for (bitp = cp + 1, b = bitlen; bitp < lim && b > 7; b -= 8, bitp++) { 105 TCHECK(*bitp); 106 printf("%02x", *bitp); 107 } 108 if (b > 4) { 109 TCHECK(*bitp); 110 tc = *bitp++; 111 printf("%02x", tc & (0xff << (8 - b))); 112 } else if (b > 0) { 113 TCHECK(*bitp); 114 tc = *bitp++; 115 printf("%1x", ((tc >> 4) & 0x0f) & (0x0f << (4 - b))); 116 } 117 printf("/%d]", bitlen); 118 return lim; 119 trunc: 120 printf(".../%d]", bitlen); 121 return NULL; 122 } 123 124 static int 125 labellen(const u_char *cp) 126 { 127 register u_int i; 128 129 if (!TTEST2(*cp, 1)) 130 return(-1); 131 i = *cp; 132 if ((i & INDIR_MASK) == EDNS0_MASK) { 133 int bitlen, elt; 134 if ((elt = (i & ~INDIR_MASK)) != EDNS0_ELT_BITLABEL) { 135 printf("<ELT %d>", elt); 136 return(-1); 137 } 138 if (!TTEST2(*(cp + 1), 1)) 139 return(-1); 140 if ((bitlen = *(cp + 1)) == 0) 141 bitlen = 256; 142 return(((bitlen + 7) / 8) + 1); 143 } else 144 return(i); 145 } 146 147 const u_char * 148 ns_nprint(register const u_char *cp, register const u_char *bp) 149 { 150 register u_int i, l; 151 register const u_char *rp = NULL; 152 register int compress = 0; 153 int chars_processed; 154 int elt; 155 int data_size = snapend - bp; 156 157 if ((l = labellen(cp)) == (u_int)-1) 158 return(NULL); 159 if (!TTEST2(*cp, 1)) 160 return(NULL); 161 chars_processed = 1; 162 if (((i = *cp++) & INDIR_MASK) != INDIR_MASK) { 163 compress = 0; 164 rp = cp + l; 165 } 166 167 if (i != 0) 168 while (i && cp < snapend) { 169 if ((i & INDIR_MASK) == INDIR_MASK) { 170 if (!compress) { 171 rp = cp + 1; 172 compress = 1; 173 } 174 if (!TTEST2(*cp, 1)) 175 return(NULL); 176 cp = bp + (((i << 8) | *cp) & 0x3fff); 177 if ((l = labellen(cp)) == (u_int)-1) 178 return(NULL); 179 if (!TTEST2(*cp, 1)) 180 return(NULL); 181 i = *cp++; 182 chars_processed++; 183 184 /* 185 * If we've looked at every character in 186 * the message, this pointer will make 187 * us look at some character again, 188 * which means we're looping. 189 */ 190 if (chars_processed >= data_size) { 191 printf("<LOOP>"); 192 return (NULL); 193 } 194 continue; 195 } 196 if ((i & INDIR_MASK) == EDNS0_MASK) { 197 elt = (i & ~INDIR_MASK); 198 switch(elt) { 199 case EDNS0_ELT_BITLABEL: 200 if (blabel_print(cp) == NULL) 201 return (NULL); 202 break; 203 default: 204 /* unknown ELT */ 205 printf("<ELT %d>", elt); 206 return(NULL); 207 } 208 } else { 209 if (fn_printn(cp, l, snapend)) 210 return(NULL); 211 } 212 213 cp += l; 214 chars_processed += l; 215 putchar('.'); 216 if ((l = labellen(cp)) == (u_int)-1) 217 return(NULL); 218 if (!TTEST2(*cp, 1)) 219 return(NULL); 220 i = *cp++; 221 chars_processed++; 222 if (!compress) 223 rp += l + 1; 224 } 225 else 226 putchar('.'); 227 return (rp); 228 } 229 230 /* print a <character-string> */ 231 static const u_char * 232 ns_cprint(register const u_char *cp) 233 { 234 register u_int i; 235 236 if (!TTEST2(*cp, 1)) 237 return (NULL); 238 i = *cp++; 239 if (fn_printn(cp, i, snapend)) 240 return (NULL); 241 return (cp + i); 242 } 243 244 /* http://www.iana.org/assignments/dns-parameters */ 245 const struct tok ns_type2str[] = { 246 { T_A, "A" }, /* RFC 1035 */ 247 { T_NS, "NS" }, /* RFC 1035 */ 248 { T_MD, "MD" }, /* RFC 1035 */ 249 { T_MF, "MF" }, /* RFC 1035 */ 250 { T_CNAME, "CNAME" }, /* RFC 1035 */ 251 { T_SOA, "SOA" }, /* RFC 1035 */ 252 { T_MB, "MB" }, /* RFC 1035 */ 253 { T_MG, "MG" }, /* RFC 1035 */ 254 { T_MR, "MR" }, /* RFC 1035 */ 255 { T_NULL, "NULL" }, /* RFC 1035 */ 256 { T_WKS, "WKS" }, /* RFC 1035 */ 257 { T_PTR, "PTR" }, /* RFC 1035 */ 258 { T_HINFO, "HINFO" }, /* RFC 1035 */ 259 { T_MINFO, "MINFO" }, /* RFC 1035 */ 260 { T_MX, "MX" }, /* RFC 1035 */ 261 { T_TXT, "TXT" }, /* RFC 1035 */ 262 { T_RP, "RP" }, /* RFC 1183 */ 263 { T_AFSDB, "AFSDB" }, /* RFC 1183 */ 264 { T_X25, "X25" }, /* RFC 1183 */ 265 { T_ISDN, "ISDN" }, /* RFC 1183 */ 266 { T_RT, "RT" }, /* RFC 1183 */ 267 { T_NSAP, "NSAP" }, /* RFC 1706 */ 268 { T_NSAP_PTR, "NSAP_PTR" }, 269 { T_SIG, "SIG" }, /* RFC 2535 */ 270 { T_KEY, "KEY" }, /* RFC 2535 */ 271 { T_PX, "PX" }, /* RFC 2163 */ 272 { T_GPOS, "GPOS" }, /* RFC 1712 */ 273 { T_AAAA, "AAAA" }, /* RFC 1886 */ 274 { T_LOC, "LOC" }, /* RFC 1876 */ 275 { T_NXT, "NXT" }, /* RFC 2535 */ 276 { T_EID, "EID" }, /* Nimrod */ 277 { T_NIMLOC, "NIMLOC" }, /* Nimrod */ 278 { T_SRV, "SRV" }, /* RFC 2782 */ 279 { T_ATMA, "ATMA" }, /* ATM Forum */ 280 { T_NAPTR, "NAPTR" }, /* RFC 2168, RFC 2915 */ 281 { T_KX, "KX" }, /* RFC 2230 */ 282 { T_CERT, "CERT" }, /* RFC 2538 */ 283 { T_A6, "A6" }, /* RFC 2874 */ 284 { T_DNAME, "DNAME" }, /* RFC 2672 */ 285 { T_SINK, "SINK" }, 286 { T_OPT, "OPT" }, /* RFC 2671 */ 287 { T_APL, "APL" }, /* RFC 3123 */ 288 { T_DS, "DS" }, /* RFC 4034 */ 289 { T_SSHFP, "SSHFP" }, /* RFC 4255 */ 290 { T_IPSECKEY, "IPSECKEY" }, /* RFC 4025 */ 291 { T_RRSIG, "RRSIG" }, /* RFC 4034 */ 292 { T_NSEC, "NSEC" }, /* RFC 4034 */ 293 { T_DNSKEY, "DNSKEY" }, /* RFC 4034 */ 294 { T_SPF, "SPF" }, /* RFC-schlitt-spf-classic-02.txt */ 295 { T_UINFO, "UINFO" }, 296 { T_UID, "UID" }, 297 { T_GID, "GID" }, 298 { T_UNSPEC, "UNSPEC" }, 299 { T_UNSPECA, "UNSPECA" }, 300 { T_TKEY, "TKEY" }, /* RFC 2930 */ 301 { T_TSIG, "TSIG" }, /* RFC 2845 */ 302 { T_IXFR, "IXFR" }, /* RFC 1995 */ 303 { T_AXFR, "AXFR" }, /* RFC 1035 */ 304 { T_MAILB, "MAILB" }, /* RFC 1035 */ 305 { T_MAILA, "MAILA" }, /* RFC 1035 */ 306 { T_ANY, "ANY" }, 307 { 0, NULL } 308 }; 309 310 const struct tok ns_class2str[] = { 311 { C_IN, "IN" }, /* Not used */ 312 { C_CHAOS, "CHAOS" }, 313 { C_HS, "HS" }, 314 { C_ANY, "ANY" }, 315 { 0, NULL } 316 }; 317 318 /* print a query */ 319 static const u_char * 320 ns_qprint(register const u_char *cp, register const u_char *bp, int is_mdns) 321 { 322 register const u_char *np = cp; 323 register u_int i, class; 324 325 cp = ns_nskip(cp); 326 327 if (cp == NULL || !TTEST2(*cp, 4)) 328 return(NULL); 329 330 /* print the qtype */ 331 i = EXTRACT_16BITS(cp); 332 cp += 2; 333 printf(" %s", tok2str(ns_type2str, "Type%d", i)); 334 /* print the qclass (if it's not IN) */ 335 i = EXTRACT_16BITS(cp); 336 cp += 2; 337 if (is_mdns) 338 class = (i & ~C_QU); 339 else 340 class = i; 341 if (class != C_IN) 342 printf(" %s", tok2str(ns_class2str, "(Class %d)", class)); 343 if (is_mdns) { 344 if (i & C_QU) 345 printf(" (QU)"); 346 else 347 printf(" (QM)"); 348 } 349 350 fputs("? ", stdout); 351 cp = ns_nprint(np, bp); 352 return(cp ? cp + 4 : NULL); 353 } 354 355 /* print a reply */ 356 static const u_char * 357 ns_rprint(register const u_char *cp, register const u_char *bp, int is_mdns) 358 { 359 register u_int i, class, opt_flags = 0; 360 register u_short typ, len; 361 register const u_char *rp; 362 363 if (vflag) { 364 putchar(' '); 365 if ((cp = ns_nprint(cp, bp)) == NULL) 366 return NULL; 367 } else 368 cp = ns_nskip(cp); 369 370 if (cp == NULL || !TTEST2(*cp, 10)) 371 return (snapend); 372 373 /* print the type/qtype */ 374 typ = EXTRACT_16BITS(cp); 375 cp += 2; 376 /* print the class (if it's not IN and the type isn't OPT) */ 377 i = EXTRACT_16BITS(cp); 378 cp += 2; 379 if (is_mdns) 380 class = (i & ~C_CACHE_FLUSH); 381 else 382 class = i; 383 if (class != C_IN && typ != T_OPT) 384 printf(" %s", tok2str(ns_class2str, "(Class %d)", class)); 385 if (is_mdns) { 386 if (i & C_CACHE_FLUSH) 387 printf(" (Cache flush)"); 388 } 389 390 if (typ == T_OPT) { 391 /* get opt flags */ 392 cp += 2; 393 opt_flags = EXTRACT_16BITS(cp); 394 /* ignore rest of ttl field */ 395 cp += 2; 396 } else if (vflag > 2) { 397 /* print ttl */ 398 printf(" ["); 399 relts_print(EXTRACT_32BITS(cp)); 400 printf("]"); 401 cp += 4; 402 } else { 403 /* ignore ttl */ 404 cp += 4; 405 } 406 407 len = EXTRACT_16BITS(cp); 408 cp += 2; 409 410 rp = cp + len; 411 412 printf(" %s", tok2str(ns_type2str, "Type%d", typ)); 413 if (rp > snapend) 414 return(NULL); 415 416 switch (typ) { 417 case T_A: 418 if (!TTEST2(*cp, sizeof(struct in_addr))) 419 return(NULL); 420 printf(" %s", intoa(htonl(EXTRACT_32BITS(cp)))); 421 break; 422 423 case T_NS: 424 case T_CNAME: 425 case T_PTR: 426 #ifdef T_DNAME 427 case T_DNAME: 428 #endif 429 putchar(' '); 430 if (ns_nprint(cp, bp) == NULL) 431 return(NULL); 432 break; 433 434 case T_SOA: 435 if (!vflag) 436 break; 437 putchar(' '); 438 if ((cp = ns_nprint(cp, bp)) == NULL) 439 return(NULL); 440 putchar(' '); 441 if ((cp = ns_nprint(cp, bp)) == NULL) 442 return(NULL); 443 if (!TTEST2(*cp, 5 * 4)) 444 return(NULL); 445 printf(" %u", EXTRACT_32BITS(cp)); 446 cp += 4; 447 printf(" %u", EXTRACT_32BITS(cp)); 448 cp += 4; 449 printf(" %u", EXTRACT_32BITS(cp)); 450 cp += 4; 451 printf(" %u", EXTRACT_32BITS(cp)); 452 cp += 4; 453 printf(" %u", EXTRACT_32BITS(cp)); 454 cp += 4; 455 break; 456 case T_MX: 457 putchar(' '); 458 if (!TTEST2(*cp, 2)) 459 return(NULL); 460 if (ns_nprint(cp + 2, bp) == NULL) 461 return(NULL); 462 printf(" %d", EXTRACT_16BITS(cp)); 463 break; 464 465 case T_TXT: 466 while (cp < rp) { 467 printf(" \""); 468 cp = ns_cprint(cp); 469 if (cp == NULL) 470 return(NULL); 471 putchar('"'); 472 } 473 break; 474 475 case T_SRV: 476 putchar(' '); 477 if (!TTEST2(*cp, 6)) 478 return(NULL); 479 if (ns_nprint(cp + 6, bp) == NULL) 480 return(NULL); 481 printf(":%d %d %d", EXTRACT_16BITS(cp + 4), 482 EXTRACT_16BITS(cp), EXTRACT_16BITS(cp + 2)); 483 break; 484 485 #ifdef INET6 486 case T_AAAA: 487 { 488 struct in6_addr addr; 489 char ntop_buf[INET6_ADDRSTRLEN]; 490 491 if (!TTEST2(*cp, sizeof(struct in6_addr))) 492 return(NULL); 493 memcpy(&addr, cp, sizeof(struct in6_addr)); 494 printf(" %s", 495 inet_ntop(AF_INET6, &addr, ntop_buf, sizeof(ntop_buf))); 496 497 break; 498 } 499 500 case T_A6: 501 { 502 struct in6_addr a; 503 int pbit, pbyte; 504 char ntop_buf[INET6_ADDRSTRLEN]; 505 506 if (!TTEST2(*cp, 1)) 507 return(NULL); 508 pbit = *cp; 509 pbyte = (pbit & ~7) / 8; 510 if (pbit > 128) { 511 printf(" %u(bad plen)", pbit); 512 break; 513 } else if (pbit < 128) { 514 if (!TTEST2(*(cp + 1), sizeof(a) - pbyte)) 515 return(NULL); 516 memset(&a, 0, sizeof(a)); 517 memcpy(&a.s6_addr[pbyte], cp + 1, sizeof(a) - pbyte); 518 printf(" %u %s", pbit, 519 inet_ntop(AF_INET6, &a, ntop_buf, sizeof(ntop_buf))); 520 } 521 if (pbit > 0) { 522 putchar(' '); 523 if (ns_nprint(cp + 1 + sizeof(a) - pbyte, bp) == NULL) 524 return(NULL); 525 } 526 break; 527 } 528 #endif /*INET6*/ 529 530 case T_OPT: 531 printf(" UDPsize=%u", class); 532 if (opt_flags & 0x8000) 533 printf(" OK"); 534 break; 535 536 case T_UNSPECA: /* One long string */ 537 if (!TTEST2(*cp, len)) 538 return(NULL); 539 if (fn_printn(cp, len, snapend)) 540 return(NULL); 541 break; 542 543 case T_TSIG: 544 { 545 if (cp + len > snapend) 546 return(NULL); 547 if (!vflag) 548 break; 549 putchar(' '); 550 if ((cp = ns_nprint(cp, bp)) == NULL) 551 return(NULL); 552 cp += 6; 553 if (!TTEST2(*cp, 2)) 554 return(NULL); 555 printf(" fudge=%u", EXTRACT_16BITS(cp)); 556 cp += 2; 557 if (!TTEST2(*cp, 2)) 558 return(NULL); 559 printf(" maclen=%u", EXTRACT_16BITS(cp)); 560 cp += 2 + EXTRACT_16BITS(cp); 561 if (!TTEST2(*cp, 2)) 562 return(NULL); 563 printf(" origid=%u", EXTRACT_16BITS(cp)); 564 cp += 2; 565 if (!TTEST2(*cp, 2)) 566 return(NULL); 567 printf(" error=%u", EXTRACT_16BITS(cp)); 568 cp += 2; 569 if (!TTEST2(*cp, 2)) 570 return(NULL); 571 printf(" otherlen=%u", EXTRACT_16BITS(cp)); 572 cp += 2; 573 } 574 } 575 return (rp); /* XXX This isn't always right */ 576 } 577 578 void 579 ns_print(register const u_char *bp, u_int length, int is_mdns) 580 { 581 register const HEADER *np; 582 register int qdcount, ancount, nscount, arcount; 583 register const u_char *cp; 584 u_int16_t b2; 585 586 np = (const HEADER *)bp; 587 TCHECK(*np); 588 /* get the byte-order right */ 589 qdcount = EXTRACT_16BITS(&np->qdcount); 590 ancount = EXTRACT_16BITS(&np->ancount); 591 nscount = EXTRACT_16BITS(&np->nscount); 592 arcount = EXTRACT_16BITS(&np->arcount); 593 594 if (DNS_QR(np)) { 595 /* this is a response */ 596 printf("%d%s%s%s%s%s%s", 597 EXTRACT_16BITS(&np->id), 598 ns_ops[DNS_OPCODE(np)], 599 ns_resp[DNS_RCODE(np)], 600 DNS_AA(np)? "*" : "", 601 DNS_RA(np)? "" : "-", 602 DNS_TC(np)? "|" : "", 603 DNS_AD(np)? "$" : ""); 604 605 if (qdcount != 1) 606 printf(" [%dq]", qdcount); 607 /* Print QUESTION section on -vv */ 608 cp = (const u_char *)(np + 1); 609 while (qdcount--) { 610 if (qdcount < EXTRACT_16BITS(&np->qdcount) - 1) 611 putchar(','); 612 if (vflag > 1) { 613 fputs(" q:", stdout); 614 if ((cp = ns_qprint(cp, bp, is_mdns)) == NULL) 615 goto trunc; 616 } else { 617 if ((cp = ns_nskip(cp)) == NULL) 618 goto trunc; 619 cp += 4; /* skip QTYPE and QCLASS */ 620 } 621 } 622 printf(" %d/%d/%d", ancount, nscount, arcount); 623 if (ancount--) { 624 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 625 goto trunc; 626 while (cp < snapend && ancount--) { 627 putchar(','); 628 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 629 goto trunc; 630 } 631 } 632 if (ancount > 0) 633 goto trunc; 634 /* Print NS and AR sections on -vv */ 635 if (vflag > 1) { 636 if (cp < snapend && nscount--) { 637 fputs(" ns:", stdout); 638 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 639 goto trunc; 640 while (cp < snapend && nscount--) { 641 putchar(','); 642 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 643 goto trunc; 644 } 645 } 646 if (nscount > 0) 647 goto trunc; 648 if (cp < snapend && arcount--) { 649 fputs(" ar:", stdout); 650 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 651 goto trunc; 652 while (cp < snapend && arcount--) { 653 putchar(','); 654 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 655 goto trunc; 656 } 657 } 658 if (arcount > 0) 659 goto trunc; 660 } 661 } 662 else { 663 /* this is a request */ 664 printf("%d%s%s%s", EXTRACT_16BITS(&np->id), ns_ops[DNS_OPCODE(np)], 665 DNS_RD(np) ? "+" : "", 666 DNS_CD(np) ? "%" : ""); 667 668 /* any weirdness? */ 669 b2 = EXTRACT_16BITS(((u_short *)np)+1); 670 if (b2 & 0x6cf) 671 printf(" [b2&3=0x%x]", b2); 672 673 if (DNS_OPCODE(np) == IQUERY) { 674 if (qdcount) 675 printf(" [%dq]", qdcount); 676 if (ancount != 1) 677 printf(" [%da]", ancount); 678 } 679 else { 680 if (ancount) 681 printf(" [%da]", ancount); 682 if (qdcount != 1) 683 printf(" [%dq]", qdcount); 684 } 685 if (nscount) 686 printf(" [%dn]", nscount); 687 if (arcount) 688 printf(" [%dau]", arcount); 689 690 cp = (const u_char *)(np + 1); 691 if (qdcount--) { 692 cp = ns_qprint(cp, (const u_char *)np, is_mdns); 693 if (!cp) 694 goto trunc; 695 while (cp < snapend && qdcount--) { 696 cp = ns_qprint((const u_char *)cp, 697 (const u_char *)np, 698 is_mdns); 699 if (!cp) 700 goto trunc; 701 } 702 } 703 if (qdcount > 0) 704 goto trunc; 705 706 /* Print remaining sections on -vv */ 707 if (vflag > 1) { 708 if (ancount--) { 709 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 710 goto trunc; 711 while (cp < snapend && ancount--) { 712 putchar(','); 713 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 714 goto trunc; 715 } 716 } 717 if (ancount > 0) 718 goto trunc; 719 if (cp < snapend && nscount--) { 720 fputs(" ns:", stdout); 721 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 722 goto trunc; 723 while (nscount-- && cp < snapend) { 724 putchar(','); 725 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 726 goto trunc; 727 } 728 } 729 if (nscount > 0) 730 goto trunc; 731 if (cp < snapend && arcount--) { 732 fputs(" ar:", stdout); 733 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 734 goto trunc; 735 while (cp < snapend && arcount--) { 736 putchar(','); 737 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 738 goto trunc; 739 } 740 } 741 if (arcount > 0) 742 goto trunc; 743 } 744 } 745 printf(" (%d)", length); 746 return; 747 748 trunc: 749 printf("[|domain]"); 750 return; 751 } 752
