print-domain.c revision 1.3
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 #include <sys/cdefs.h> 23 #ifndef lint 24 #if 0 25 static const char rcsid[] _U_ = 26 "@(#) Header: /tcpdump/master/tcpdump/print-domain.c,v 1.98 2007-12-09 01:40:32 guy Exp (LBL)"; 27 #else 28 __RCSID("$NetBSD: print-domain.c,v 1.3 2013/04/06 19:33:08 christos Exp $"); 29 #endif 30 #endif 31 32 #ifdef HAVE_CONFIG_H 33 #include "config.h" 34 #endif 35 36 #include <tcpdump-stdinc.h> 37 38 #include "nameser.h" 39 40 #include <stdio.h> 41 #include <string.h> 42 43 #include "interface.h" 44 #include "addrtoname.h" 45 #include "extract.h" /* must come after interface.h */ 46 47 static const char *ns_ops[] = { 48 "", " inv_q", " stat", " op3", " notify", " update", " op6", " op7", 49 " op8", " updataA", " updateD", " updateDA", 50 " updateM", " updateMA", " zoneInit", " zoneRef", 51 }; 52 53 static const char *ns_resp[] = { 54 "", " FormErr", " ServFail", " NXDomain", 55 " NotImp", " Refused", " YXDomain", " YXRRSet", 56 " NXRRSet", " NotAuth", " NotZone", " Resp11", 57 " Resp12", " Resp13", " Resp14", " NoChange", 58 }; 59 60 /* skip over a domain name */ 61 static const u_char * 62 ns_nskip(register const u_char *cp) 63 { 64 register u_char i; 65 66 if (!TTEST2(*cp, 1)) 67 return (NULL); 68 i = *cp++; 69 while (i) { 70 if ((i & INDIR_MASK) == INDIR_MASK) 71 return (cp + 1); 72 if ((i & INDIR_MASK) == EDNS0_MASK) { 73 int bitlen, bytelen; 74 75 if ((i & ~INDIR_MASK) != EDNS0_ELT_BITLABEL) 76 return(NULL); /* unknown ELT */ 77 if (!TTEST2(*cp, 1)) 78 return (NULL); 79 if ((bitlen = *cp++) == 0) 80 bitlen = 256; 81 bytelen = (bitlen + 7) / 8; 82 cp += bytelen; 83 } else 84 cp += i; 85 if (!TTEST2(*cp, 1)) 86 return (NULL); 87 i = *cp++; 88 } 89 return (cp); 90 } 91 92 /* print a <domain-name> */ 93 static const u_char * 94 blabel_print(const u_char *cp) 95 { 96 int bitlen, slen, b; 97 const u_char *bitp, *lim; 98 char tc; 99 100 if (!TTEST2(*cp, 1)) 101 return(NULL); 102 if ((bitlen = *cp) == 0) 103 bitlen = 256; 104 slen = (bitlen + 3) / 4; 105 lim = cp + 1 + slen; 106 107 /* print the bit string as a hex string */ 108 printf("\\[x"); 109 for (bitp = cp + 1, b = bitlen; bitp < lim && b > 7; b -= 8, bitp++) { 110 TCHECK(*bitp); 111 printf("%02x", *bitp); 112 } 113 if (b > 4) { 114 TCHECK(*bitp); 115 tc = *bitp++; 116 printf("%02x", tc & (0xff << (8 - b))); 117 } else if (b > 0) { 118 TCHECK(*bitp); 119 tc = *bitp++; 120 printf("%1x", ((tc >> 4) & 0x0f) & (0x0f << (4 - b))); 121 } 122 printf("/%d]", bitlen); 123 return lim; 124 trunc: 125 printf(".../%d]", bitlen); 126 return NULL; 127 } 128 129 static int 130 labellen(const u_char *cp) 131 { 132 register u_int i; 133 134 if (!TTEST2(*cp, 1)) 135 return(-1); 136 i = *cp; 137 if ((i & INDIR_MASK) == EDNS0_MASK) { 138 int bitlen, elt; 139 if ((elt = (i & ~INDIR_MASK)) != EDNS0_ELT_BITLABEL) { 140 printf("<ELT %d>", elt); 141 return(-1); 142 } 143 if (!TTEST2(*(cp + 1), 1)) 144 return(-1); 145 if ((bitlen = *(cp + 1)) == 0) 146 bitlen = 256; 147 return(((bitlen + 7) / 8) + 1); 148 } else 149 return(i); 150 } 151 152 static const u_char * 153 ns_nprint(register const u_char *cp, register const u_char *bp) 154 { 155 register u_int i, l; 156 register const u_char *rp = NULL; 157 register int compress = 0; 158 int chars_processed; 159 int elt; 160 int data_size = snapend - bp; 161 162 if ((l = labellen(cp)) == (u_int)-1) 163 return(NULL); 164 if (!TTEST2(*cp, 1)) 165 return(NULL); 166 chars_processed = 1; 167 if (((i = *cp++) & INDIR_MASK) != INDIR_MASK) { 168 compress = 0; 169 rp = cp + l; 170 } 171 172 if (i != 0) 173 while (i && cp < snapend) { 174 if ((i & INDIR_MASK) == INDIR_MASK) { 175 if (!compress) { 176 rp = cp + 1; 177 compress = 1; 178 } 179 if (!TTEST2(*cp, 1)) 180 return(NULL); 181 cp = bp + (((i << 8) | *cp) & 0x3fff); 182 if ((l = labellen(cp)) == (u_int)-1) 183 return(NULL); 184 if (!TTEST2(*cp, 1)) 185 return(NULL); 186 i = *cp++; 187 chars_processed++; 188 189 /* 190 * If we've looked at every character in 191 * the message, this pointer will make 192 * us look at some character again, 193 * which means we're looping. 194 */ 195 if (chars_processed >= data_size) { 196 printf("<LOOP>"); 197 return (NULL); 198 } 199 continue; 200 } 201 if ((i & INDIR_MASK) == EDNS0_MASK) { 202 elt = (i & ~INDIR_MASK); 203 switch(elt) { 204 case EDNS0_ELT_BITLABEL: 205 if (blabel_print(cp) == NULL) 206 return (NULL); 207 break; 208 default: 209 /* unknown ELT */ 210 printf("<ELT %d>", elt); 211 return(NULL); 212 } 213 } else { 214 if (fn_printn(cp, l, snapend)) 215 return(NULL); 216 } 217 218 cp += l; 219 chars_processed += l; 220 putchar('.'); 221 if ((l = labellen(cp)) == (u_int)-1) 222 return(NULL); 223 if (!TTEST2(*cp, 1)) 224 return(NULL); 225 i = *cp++; 226 chars_processed++; 227 if (!compress) 228 rp += l + 1; 229 } 230 else 231 putchar('.'); 232 return (rp); 233 } 234 235 /* print a <character-string> */ 236 static const u_char * 237 ns_cprint(register const u_char *cp) 238 { 239 register u_int i; 240 241 if (!TTEST2(*cp, 1)) 242 return (NULL); 243 i = *cp++; 244 if (fn_printn(cp, i, snapend)) 245 return (NULL); 246 return (cp + i); 247 } 248 249 /* http://www.iana.org/assignments/dns-parameters */ 250 struct tok ns_type2str[] = { 251 { T_A, "A" }, /* RFC 1035 */ 252 { T_NS, "NS" }, /* RFC 1035 */ 253 { T_MD, "MD" }, /* RFC 1035 */ 254 { T_MF, "MF" }, /* RFC 1035 */ 255 { T_CNAME, "CNAME" }, /* RFC 1035 */ 256 { T_SOA, "SOA" }, /* RFC 1035 */ 257 { T_MB, "MB" }, /* RFC 1035 */ 258 { T_MG, "MG" }, /* RFC 1035 */ 259 { T_MR, "MR" }, /* RFC 1035 */ 260 { T_NULL, "NULL" }, /* RFC 1035 */ 261 { T_WKS, "WKS" }, /* RFC 1035 */ 262 { T_PTR, "PTR" }, /* RFC 1035 */ 263 { T_HINFO, "HINFO" }, /* RFC 1035 */ 264 { T_MINFO, "MINFO" }, /* RFC 1035 */ 265 { T_MX, "MX" }, /* RFC 1035 */ 266 { T_TXT, "TXT" }, /* RFC 1035 */ 267 { T_RP, "RP" }, /* RFC 1183 */ 268 { T_AFSDB, "AFSDB" }, /* RFC 1183 */ 269 { T_X25, "X25" }, /* RFC 1183 */ 270 { T_ISDN, "ISDN" }, /* RFC 1183 */ 271 { T_RT, "RT" }, /* RFC 1183 */ 272 { T_NSAP, "NSAP" }, /* RFC 1706 */ 273 { T_NSAP_PTR, "NSAP_PTR" }, 274 { T_SIG, "SIG" }, /* RFC 2535 */ 275 { T_KEY, "KEY" }, /* RFC 2535 */ 276 { T_PX, "PX" }, /* RFC 2163 */ 277 { T_GPOS, "GPOS" }, /* RFC 1712 */ 278 { T_AAAA, "AAAA" }, /* RFC 1886 */ 279 { T_LOC, "LOC" }, /* RFC 1876 */ 280 { T_NXT, "NXT" }, /* RFC 2535 */ 281 { T_EID, "EID" }, /* Nimrod */ 282 { T_NIMLOC, "NIMLOC" }, /* Nimrod */ 283 { T_SRV, "SRV" }, /* RFC 2782 */ 284 { T_ATMA, "ATMA" }, /* ATM Forum */ 285 { T_NAPTR, "NAPTR" }, /* RFC 2168, RFC 2915 */ 286 { T_KX, "KX" }, /* RFC 2230 */ 287 { T_CERT, "CERT" }, /* RFC 2538 */ 288 { T_A6, "A6" }, /* RFC 2874 */ 289 { T_DNAME, "DNAME" }, /* RFC 2672 */ 290 { T_SINK, "SINK" }, 291 { T_OPT, "OPT" }, /* RFC 2671 */ 292 { T_APL, "APL" }, /* RFC 3123 */ 293 { T_DS, "DS" }, /* RFC 4034 */ 294 { T_SSHFP, "SSHFP" }, /* RFC 4255 */ 295 { T_IPSECKEY, "IPSECKEY" }, /* RFC 4025 */ 296 { T_RRSIG, "RRSIG" }, /* RFC 4034 */ 297 { T_NSEC, "NSEC" }, /* RFC 4034 */ 298 { T_DNSKEY, "DNSKEY" }, /* RFC 4034 */ 299 { T_SPF, "SPF" }, /* RFC-schlitt-spf-classic-02.txt */ 300 { T_UINFO, "UINFO" }, 301 { T_UID, "UID" }, 302 { T_GID, "GID" }, 303 { T_UNSPEC, "UNSPEC" }, 304 { T_UNSPECA, "UNSPECA" }, 305 { T_TKEY, "TKEY" }, /* RFC 2930 */ 306 { T_TSIG, "TSIG" }, /* RFC 2845 */ 307 { T_IXFR, "IXFR" }, /* RFC 1995 */ 308 { T_AXFR, "AXFR" }, /* RFC 1035 */ 309 { T_MAILB, "MAILB" }, /* RFC 1035 */ 310 { T_MAILA, "MAILA" }, /* RFC 1035 */ 311 { T_ANY, "ANY" }, 312 { 0, NULL } 313 }; 314 315 struct tok ns_class2str[] = { 316 { C_IN, "IN" }, /* Not used */ 317 { C_CHAOS, "CHAOS" }, 318 { C_HS, "HS" }, 319 { C_ANY, "ANY" }, 320 { 0, NULL } 321 }; 322 323 /* print a query */ 324 static const u_char * 325 ns_qprint(register const u_char *cp, register const u_char *bp, int is_mdns) 326 { 327 register const u_char *np = cp; 328 register u_int i, class; 329 330 cp = ns_nskip(cp); 331 332 if (cp == NULL || !TTEST2(*cp, 4)) 333 return(NULL); 334 335 /* print the qtype */ 336 i = EXTRACT_16BITS(cp); 337 cp += 2; 338 printf(" %s", tok2str(ns_type2str, "Type%d", i)); 339 /* print the qclass (if it's not IN) */ 340 i = EXTRACT_16BITS(cp); 341 cp += 2; 342 if (is_mdns) 343 class = (i & ~C_QU); 344 else 345 class = i; 346 if (class != C_IN) 347 printf(" %s", tok2str(ns_class2str, "(Class %d)", class)); 348 if (is_mdns) { 349 if (i & C_QU) 350 printf(" (QU)"); 351 else 352 printf(" (QM)"); 353 } 354 355 fputs("? ", stdout); 356 cp = ns_nprint(np, bp); 357 return(cp ? cp + 4 : NULL); 358 } 359 360 /* print a reply */ 361 static const u_char * 362 ns_rprint(register const u_char *cp, register const u_char *bp, int is_mdns) 363 { 364 register u_int i, class, opt_flags = 0; 365 register u_short typ, len; 366 register const u_char *rp; 367 368 if (vflag) { 369 putchar(' '); 370 if ((cp = ns_nprint(cp, bp)) == NULL) 371 return NULL; 372 } else 373 cp = ns_nskip(cp); 374 375 if (cp == NULL || !TTEST2(*cp, 10)) 376 return (snapend); 377 378 /* print the type/qtype */ 379 typ = EXTRACT_16BITS(cp); 380 cp += 2; 381 /* print the class (if it's not IN and the type isn't OPT) */ 382 i = EXTRACT_16BITS(cp); 383 cp += 2; 384 if (is_mdns) 385 class = (i & ~C_CACHE_FLUSH); 386 else 387 class = i; 388 if (class != C_IN && typ != T_OPT) 389 printf(" %s", tok2str(ns_class2str, "(Class %d)", class)); 390 if (is_mdns) { 391 if (i & C_CACHE_FLUSH) 392 printf(" (Cache flush)"); 393 } 394 395 if (typ == T_OPT) { 396 /* get opt flags */ 397 cp += 2; 398 opt_flags = EXTRACT_16BITS(cp); 399 /* ignore rest of ttl field */ 400 cp += 2; 401 } else if (vflag > 2) { 402 /* print ttl */ 403 printf(" ["); 404 relts_print(EXTRACT_32BITS(cp)); 405 printf("]"); 406 cp += 4; 407 } else { 408 /* ignore ttl */ 409 cp += 4; 410 } 411 412 len = EXTRACT_16BITS(cp); 413 cp += 2; 414 415 rp = cp + len; 416 417 printf(" %s", tok2str(ns_type2str, "Type%d", typ)); 418 if (rp > snapend) 419 return(NULL); 420 421 switch (typ) { 422 case T_A: 423 if (!TTEST2(*cp, sizeof(struct in_addr))) 424 return(NULL); 425 printf(" %s", intoa(htonl(EXTRACT_32BITS(cp)))); 426 break; 427 428 case T_NS: 429 case T_CNAME: 430 case T_PTR: 431 #ifdef T_DNAME 432 case T_DNAME: 433 #endif 434 putchar(' '); 435 if (ns_nprint(cp, bp) == NULL) 436 return(NULL); 437 break; 438 439 case T_SOA: 440 if (!vflag) 441 break; 442 putchar(' '); 443 if ((cp = ns_nprint(cp, bp)) == NULL) 444 return(NULL); 445 putchar(' '); 446 if ((cp = ns_nprint(cp, bp)) == NULL) 447 return(NULL); 448 if (!TTEST2(*cp, 5 * 4)) 449 return(NULL); 450 printf(" %u", EXTRACT_32BITS(cp)); 451 cp += 4; 452 printf(" %u", EXTRACT_32BITS(cp)); 453 cp += 4; 454 printf(" %u", EXTRACT_32BITS(cp)); 455 cp += 4; 456 printf(" %u", EXTRACT_32BITS(cp)); 457 cp += 4; 458 printf(" %u", EXTRACT_32BITS(cp)); 459 cp += 4; 460 break; 461 case T_MX: 462 putchar(' '); 463 if (!TTEST2(*cp, 2)) 464 return(NULL); 465 if (ns_nprint(cp + 2, bp) == NULL) 466 return(NULL); 467 printf(" %d", EXTRACT_16BITS(cp)); 468 break; 469 470 case T_TXT: 471 while (cp < rp) { 472 printf(" \""); 473 cp = ns_cprint(cp); 474 if (cp == NULL) 475 return(NULL); 476 putchar('"'); 477 } 478 break; 479 480 case T_SRV: 481 putchar(' '); 482 if (!TTEST2(*cp, 6)) 483 return(NULL); 484 if (ns_nprint(cp + 6, bp) == NULL) 485 return(NULL); 486 printf(":%d %d %d", EXTRACT_16BITS(cp + 4), 487 EXTRACT_16BITS(cp), EXTRACT_16BITS(cp + 2)); 488 break; 489 490 #ifdef INET6 491 case T_AAAA: 492 { 493 struct in6_addr addr; 494 char ntop_buf[INET6_ADDRSTRLEN]; 495 496 if (!TTEST2(*cp, sizeof(struct in6_addr))) 497 return(NULL); 498 memcpy(&addr, cp, sizeof(struct in6_addr)); 499 printf(" %s", 500 inet_ntop(AF_INET6, &addr, ntop_buf, sizeof(ntop_buf))); 501 502 break; 503 } 504 505 case T_A6: 506 { 507 struct in6_addr a; 508 int pbit, pbyte; 509 char ntop_buf[INET6_ADDRSTRLEN]; 510 511 if (!TTEST2(*cp, 1)) 512 return(NULL); 513 pbit = *cp; 514 pbyte = (pbit & ~7) / 8; 515 if (pbit > 128) { 516 printf(" %u(bad plen)", pbit); 517 break; 518 } else if (pbit < 128) { 519 if (!TTEST2(*(cp + 1), sizeof(a) - pbyte)) 520 return(NULL); 521 memset(&a, 0, sizeof(a)); 522 memcpy(&a.s6_addr[pbyte], cp + 1, sizeof(a) - pbyte); 523 printf(" %u %s", pbit, 524 inet_ntop(AF_INET6, &a, ntop_buf, sizeof(ntop_buf))); 525 } 526 if (pbit > 0) { 527 putchar(' '); 528 if (ns_nprint(cp + 1 + sizeof(a) - pbyte, bp) == NULL) 529 return(NULL); 530 } 531 break; 532 } 533 #endif /*INET6*/ 534 535 case T_OPT: 536 printf(" UDPsize=%u", class); 537 if (opt_flags & 0x8000) 538 printf(" OK"); 539 break; 540 541 case T_UNSPECA: /* One long string */ 542 if (!TTEST2(*cp, len)) 543 return(NULL); 544 if (fn_printn(cp, len, snapend)) 545 return(NULL); 546 break; 547 548 case T_TSIG: 549 { 550 if (cp + len > snapend) 551 return(NULL); 552 if (!vflag) 553 break; 554 putchar(' '); 555 if ((cp = ns_nprint(cp, bp)) == NULL) 556 return(NULL); 557 cp += 6; 558 if (!TTEST2(*cp, 2)) 559 return(NULL); 560 printf(" fudge=%u", EXTRACT_16BITS(cp)); 561 cp += 2; 562 if (!TTEST2(*cp, 2)) 563 return(NULL); 564 printf(" maclen=%u", EXTRACT_16BITS(cp)); 565 cp += 2 + EXTRACT_16BITS(cp); 566 if (!TTEST2(*cp, 2)) 567 return(NULL); 568 printf(" origid=%u", EXTRACT_16BITS(cp)); 569 cp += 2; 570 if (!TTEST2(*cp, 2)) 571 return(NULL); 572 printf(" error=%u", EXTRACT_16BITS(cp)); 573 cp += 2; 574 if (!TTEST2(*cp, 2)) 575 return(NULL); 576 printf(" otherlen=%u", EXTRACT_16BITS(cp)); 577 cp += 2; 578 } 579 } 580 return (rp); /* XXX This isn't always right */ 581 } 582 583 void 584 ns_print(register const u_char *bp, u_int length, int is_mdns) 585 { 586 register const HEADER *np; 587 register int qdcount, ancount, nscount, arcount; 588 register const u_char *cp; 589 u_int16_t b2; 590 591 np = (const HEADER *)bp; 592 TCHECK(*np); 593 /* get the byte-order right */ 594 qdcount = EXTRACT_16BITS(&np->qdcount); 595 ancount = EXTRACT_16BITS(&np->ancount); 596 nscount = EXTRACT_16BITS(&np->nscount); 597 arcount = EXTRACT_16BITS(&np->arcount); 598 599 if (DNS_QR(np)) { 600 /* this is a response */ 601 printf("%d%s%s%s%s%s%s", 602 EXTRACT_16BITS(&np->id), 603 ns_ops[DNS_OPCODE(np)], 604 ns_resp[DNS_RCODE(np)], 605 DNS_AA(np)? "*" : "", 606 DNS_RA(np)? "" : "-", 607 DNS_TC(np)? "|" : "", 608 DNS_AD(np)? "$" : ""); 609 610 if (qdcount != 1) 611 printf(" [%dq]", qdcount); 612 /* Print QUESTION section on -vv */ 613 cp = (const u_char *)(np + 1); 614 while (qdcount--) { 615 if (qdcount < EXTRACT_16BITS(&np->qdcount) - 1) 616 putchar(','); 617 if (vflag > 1) { 618 fputs(" q:", stdout); 619 if ((cp = ns_qprint(cp, bp, is_mdns)) == NULL) 620 goto trunc; 621 } else { 622 if ((cp = ns_nskip(cp)) == NULL) 623 goto trunc; 624 cp += 4; /* skip QTYPE and QCLASS */ 625 } 626 } 627 printf(" %d/%d/%d", ancount, nscount, arcount); 628 if (ancount--) { 629 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 630 goto trunc; 631 while (cp < snapend && ancount--) { 632 putchar(','); 633 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 634 goto trunc; 635 } 636 } 637 if (ancount > 0) 638 goto trunc; 639 /* Print NS and AR sections on -vv */ 640 if (vflag > 1) { 641 if (cp < snapend && nscount--) { 642 fputs(" ns:", stdout); 643 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 644 goto trunc; 645 while (cp < snapend && nscount--) { 646 putchar(','); 647 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 648 goto trunc; 649 } 650 } 651 if (nscount > 0) 652 goto trunc; 653 if (cp < snapend && arcount--) { 654 fputs(" ar:", stdout); 655 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 656 goto trunc; 657 while (cp < snapend && arcount--) { 658 putchar(','); 659 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 660 goto trunc; 661 } 662 } 663 if (arcount > 0) 664 goto trunc; 665 } 666 } 667 else { 668 /* this is a request */ 669 printf("%d%s%s%s", EXTRACT_16BITS(&np->id), ns_ops[DNS_OPCODE(np)], 670 DNS_RD(np) ? "+" : "", 671 DNS_CD(np) ? "%" : ""); 672 673 /* any weirdness? */ 674 b2 = EXTRACT_16BITS(((u_short *)np)+1); 675 if (b2 & 0x6cf) 676 printf(" [b2&3=0x%x]", b2); 677 678 if (DNS_OPCODE(np) == IQUERY) { 679 if (qdcount) 680 printf(" [%dq]", qdcount); 681 if (ancount != 1) 682 printf(" [%da]", ancount); 683 } 684 else { 685 if (ancount) 686 printf(" [%da]", ancount); 687 if (qdcount != 1) 688 printf(" [%dq]", qdcount); 689 } 690 if (nscount) 691 printf(" [%dn]", nscount); 692 if (arcount) 693 printf(" [%dau]", arcount); 694 695 cp = (const u_char *)(np + 1); 696 if (qdcount--) { 697 cp = ns_qprint(cp, (const u_char *)np, is_mdns); 698 if (!cp) 699 goto trunc; 700 while (cp < snapend && qdcount--) { 701 cp = ns_qprint((const u_char *)cp, 702 (const u_char *)np, 703 is_mdns); 704 if (!cp) 705 goto trunc; 706 } 707 } 708 if (qdcount > 0) 709 goto trunc; 710 711 /* Print remaining sections on -vv */ 712 if (vflag > 1) { 713 if (ancount--) { 714 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 715 goto trunc; 716 while (cp < snapend && ancount--) { 717 putchar(','); 718 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 719 goto trunc; 720 } 721 } 722 if (ancount > 0) 723 goto trunc; 724 if (cp < snapend && nscount--) { 725 fputs(" ns:", stdout); 726 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 727 goto trunc; 728 while (nscount-- && cp < snapend) { 729 putchar(','); 730 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 731 goto trunc; 732 } 733 } 734 if (nscount > 0) 735 goto trunc; 736 if (cp < snapend && arcount--) { 737 fputs(" ar:", stdout); 738 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 739 goto trunc; 740 while (cp < snapend && arcount--) { 741 putchar(','); 742 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL) 743 goto trunc; 744 } 745 } 746 if (arcount > 0) 747 goto trunc; 748 } 749 } 750 printf(" (%d)", length); 751 return; 752 753 trunc: 754 printf("[|domain]"); 755 return; 756 } 757
Indexes created Sun Mar 01 05:31:48 UTC 2026