contrib/tcpdump-3.8.3/print-domain.c

   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 1.86.2.3 2004/03/28 20:54:00 fenner 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
 135                 if ((elt = (i & ~INDIR_MASK)) != EDNS0_ELT_BITLABEL)
 136                         return(-1);
 137                 if (!TTEST2(*(cp + 1), 1))
 138                         return(-1);
 139                 if ((bitlen = *(cp + 1)) == 0)
 140                         bitlen = 256;
 141                 return(((bitlen + 7) / 8) + 1);
 142         } else
 143                 return(i);
 144 }
 145
 146 static const u_char *
 147 ns_nprint(register const u_char *cp, register const u_char *bp)
 148 {
 149         register u_int i, l;
 150         register const u_char *rp = NULL;
 151         register int compress = 0;
 152         int chars_processed;
 153         int elt;
 154         int data_size = snapend - bp;
 155
 156         if ((l = labellen(cp)) == (u_int)-1)
 157                 return(NULL);
 158         if (!TTEST2(*cp, 1))
 159                 return(NULL);
 160         chars_processed = 1;
 161         if (((i = *cp++) & INDIR_MASK) != INDIR_MASK) {
 162                 compress = 0;
 163                 rp = cp + l;
 164         }
 165
 166         if (i != 0)
 167                 while (i && cp < snapend) {
 168                         if ((i & INDIR_MASK) == INDIR_MASK) {
 169                                 if (!compress) {
 170                                         rp = cp + 1;
 171                                         compress = 1;
 172                                 }
 173                                 if (!TTEST2(*cp, 1))
 174                                         return(NULL);
 175                                 cp = bp + (((i << 8) | *cp) & 0x3fff);
 176                                 if ((l = labellen(cp)) == (u_int)-1)
 177                                         return(NULL);
 178                                 if (!TTEST2(*cp, 1))
 179                                         return(NULL);
 180                                 i = *cp++;
 181                                 chars_processed++;
 182
 183                                 /*
 184                                  * If we've looked at every character in
 185                                  * the message, this pointer will make
 186                                  * us look at some character again,
 187                                  * which means we're looping.
 188                                  */
 189                                 if (chars_processed >= data_size) {
 190                                         printf("<LOOP>");
 191                                         return (NULL);
 192                                 }
 193                                 continue;
 194                         }
 195                         if ((i & INDIR_MASK) == EDNS0_MASK) {
 196                                 elt = (i & ~INDIR_MASK);
 197                                 switch(elt) {
 198                                 case EDNS0_ELT_BITLABEL:
 199                                         if (blabel_print(cp) == NULL)
 200                                                 return (NULL);
 201                                         break;
 202                                 default:
 203                                         /* unknown ELT */
 204                                         printf("<ELT %d>", elt);
 205                                         return(NULL);
 206                                 }
 207                         } else {
 208                                 if (fn_printn(cp, l, snapend))
 209                                         return(NULL);
 210                         }
 211
 212                         cp += l;
 213                         chars_processed += l;
 214                         putchar('.');
 215                         if ((l = labellen(cp)) == (u_int)-1)
 216                                 return(NULL);
 217                         if (!TTEST2(*cp, 1))
 218                                 return(NULL);
 219                         i = *cp++;
 220                         chars_processed++;
 221                         if (!compress)
 222                                 rp += l + 1;
 223                 }
 224         else
 225                 putchar('.');
 226         return (rp);
 227 }
 228
 229 /* print a <character-string> */
 230 static const u_char *
 231 ns_cprint(register const u_char *cp)
 232 {
 233         register u_int i;
 234
 235         if (!TTEST2(*cp, 1))
 236                 return (NULL);
 237         i = *cp++;
 238         if (fn_printn(cp, i, snapend))
 239                 return (NULL);
 240         return (cp + i);
 241 }
 242
 243 /* http://www.iana.org/assignments/dns-parameters */
 244 struct tok ns_type2str[] = {
 245         { T_A,          "A" },                  /* RFC 1035 */
 246         { T_NS,         "NS" },                 /* RFC 1035 */
 247         { T_MD,         "MD" },                 /* RFC 1035 */
 248         { T_MF,         "MF" },                 /* RFC 1035 */
 249         { T_CNAME,      "CNAME" },              /* RFC 1035 */
 250         { T_SOA,        "SOA" },                /* RFC 1035 */
 251         { T_MB,         "MB" },                 /* RFC 1035 */
 252         { T_MG,         "MG" },                 /* RFC 1035 */
 253         { T_MR,         "MR" },                 /* RFC 1035 */
 254         { T_NULL,       "NULL" },               /* RFC 1035 */
 255         { T_WKS,        "WKS" },                /* RFC 1035 */
 256         { T_PTR,        "PTR" },                /* RFC 1035 */
 257         { T_HINFO,      "HINFO" },              /* RFC 1035 */
 258         { T_MINFO,      "MINFO" },              /* RFC 1035 */
 259         { T_MX,         "MX" },                 /* RFC 1035 */
 260         { T_TXT,        "TXT" },                /* RFC 1035 */
 261         { T_RP,         "RP" },                 /* RFC 1183 */
 262         { T_AFSDB,      "AFSDB" },              /* RFC 1183 */
 263         { T_X25,        "X25" },                /* RFC 1183 */
 264         { T_ISDN,       "ISDN" },               /* RFC 1183 */
 265         { T_RT,         "RT" },                 /* RFC 1183 */
 266         { T_NSAP,       "NSAP" },               /* RFC 1706 */
 267         { T_NSAP_PTR,   "NSAP_PTR" },
 268         { T_SIG,        "SIG" },                /* RFC 2535 */
 269         { T_KEY,        "KEY" },                /* RFC 2535 */
 270         { T_PX,         "PX" },                 /* RFC 2163 */
 271         { T_GPOS,       "GPOS" },               /* RFC 1712 */
 272         { T_AAAA,       "AAAA" },               /* RFC 1886 */
 273         { T_LOC,        "LOC" },                /* RFC 1876 */
 274         { T_NXT,        "NXT" },                /* RFC 2535 */
 275         { T_EID,        "EID" },                /* Nimrod */
 276         { T_NIMLOC,     "NIMLOC" },             /* Nimrod */
 277         { T_SRV,        "SRV" },                /* RFC 2782 */
 278         { T_ATMA,       "ATMA" },               /* ATM Forum */
 279         { T_NAPTR,      "NAPTR" },              /* RFC 2168, RFC 2915 */
 280         { T_A6,         "A6" },                 /* RFC 2874 */
 281         { T_DNAME,      "DNAME" },              /* RFC 2672 */
 282         { T_OPT,        "OPT" },                /* RFC 2671 */
 283         { T_UINFO,      "UINFO" },
 284         { T_UID,        "UID" },
 285         { T_GID,        "GID" },
 286         { T_UNSPEC,     "UNSPEC" },
 287         { T_UNSPECA,    "UNSPECA" },
 288         { T_TKEY,       "TKEY" },               /* RFC 2930 */
 289         { T_TSIG,       "TSIG" },               /* RFC 2845 */
 290         { T_IXFR,       "IXFR" },               /* RFC 1995 */
 291         { T_AXFR,       "AXFR" },               /* RFC 1035 */
 292         { T_MAILB,      "MAILB" },              /* RFC 1035 */
 293         { T_MAILA,      "MAILA" },              /* RFC 1035 */
 294         { T_ANY,        "ANY" },
 295         { 0,            NULL }
 296 };
 297
 298 struct tok ns_class2str[] = {
 299         { C_IN,         "IN" },         /* Not used */
 300         { C_CHAOS,      "CHAOS" },
 301         { C_HS,         "HS" },
 302         { C_ANY,        "ANY" },
 303         { 0,            NULL }
 304 };
 305
 306 /* print a query */
 307 static const u_char *
 308 ns_qprint(register const u_char *cp, register const u_char *bp, int is_mdns)
 309 {
 310         register const u_char *np = cp;
 311         register u_int i;
 312
 313         cp = ns_nskip(cp);
 314
 315         if (cp == NULL || !TTEST2(*cp, 4))
 316                 return(NULL);
 317
 318         /* print the qtype and qclass (if it's not IN) */
 319         i = EXTRACT_16BITS(cp);
 320         cp += 2;
 321         printf(" %s", tok2str(ns_type2str, "Type%d", i));
 322         i = EXTRACT_16BITS(cp);
 323         cp += 2;
 324         if (is_mdns && i == (C_IN|C_CACHE_FLUSH))
 325                 printf(" (Cache flush)");
 326         else if (i != C_IN)
 327                 printf(" %s", tok2str(ns_class2str, "(Class %d)", i));
 328
 329         fputs("? ", stdout);
 330         cp = ns_nprint(np, bp);
 331         return(cp ? cp + 4 : NULL);
 332 }
 333
 334 /* print a reply */
 335 static const u_char *
 336 ns_rprint(register const u_char *cp, register const u_char *bp, int is_mdns)
 337 {
 338         register u_int class;
 339         register u_short typ, len;
 340         register const u_char *rp;
 341
 342         if (vflag) {
 343                 putchar(' ');
 344                 if ((cp = ns_nprint(cp, bp)) == NULL)
 345                         return NULL;
 346         } else
 347                 cp = ns_nskip(cp);
 348
 349         if (cp == NULL || !TTEST2(*cp, 10))
 350                 return (snapend);
 351
 352         /* print the type/qtype and class (if it's not IN) */
 353         typ = EXTRACT_16BITS(cp);
 354         cp += 2;
 355         class = EXTRACT_16BITS(cp);
 356         cp += 2;
 357         if (is_mdns && class == (C_IN|C_CACHE_FLUSH))
 358                 printf(" (Cache flush)");
 359         else if (class != C_IN && typ != T_OPT)
 360                 printf(" %s", tok2str(ns_class2str, "(Class %d)", class));
 361
 362         /* ignore ttl */
 363         cp += 4;
 364
 365         len = EXTRACT_16BITS(cp);
 366         cp += 2;
 367
 368         rp = cp + len;
 369
 370         printf(" %s", tok2str(ns_type2str, "Type%d", typ));
 371         if (rp > snapend)
 372                 return(NULL);
 373
 374         switch (typ) {
 375         case T_A:
 376                 if (!TTEST2(*cp, sizeof(struct in_addr)))
 377                         return(NULL);
 378                 printf(" %s", ipaddr_string(cp));
 379                 break;
 380
 381         case T_NS:
 382         case T_CNAME:
 383         case T_PTR:
 384 #ifdef T_DNAME
 385         case T_DNAME:
 386 #endif
 387                 putchar(' ');
 388                 if (ns_nprint(cp, bp) == NULL)
 389                         return(NULL);
 390                 break;
 391
 392         case T_SOA:
 393                 if (!vflag)
 394                         break;
 395                 putchar(' ');
 396                 if ((cp = ns_nprint(cp, bp)) == NULL)
 397                         return(NULL);
 398                 putchar(' ');
 399                 if ((cp = ns_nprint(cp, bp)) == NULL)
 400                         return(NULL);
 401                 if (!TTEST2(*cp, 5 * 4))
 402                         return(NULL);
 403                 printf(" %u", EXTRACT_32BITS(cp));
 404                 cp += 4;
 405                 printf(" %u", EXTRACT_32BITS(cp));
 406                 cp += 4;
 407                 printf(" %u", EXTRACT_32BITS(cp));
 408                 cp += 4;
 409                 printf(" %u", EXTRACT_32BITS(cp));
 410                 cp += 4;
 411                 printf(" %u", EXTRACT_32BITS(cp));
 412                 cp += 4;
 413                 break;
 414         case T_MX:
 415                 putchar(' ');
 416                 if (!TTEST2(*cp, 2))
 417                         return(NULL);
 418                 if (ns_nprint(cp + 2, bp) == NULL)
 419                         return(NULL);
 420                 printf(" %d", EXTRACT_16BITS(cp));
 421                 break;
 422
 423         case T_TXT:
 424                 while (cp < rp) {
 425                         printf(" \"");
 426                         cp = ns_cprint(cp);
 427                         if (cp == NULL)
 428                                 return(NULL);
 429                         putchar('"');
 430                 }
 431                 break;
 432
 433         case T_SRV:
 434                 putchar(' ');
 435                 if (!TTEST2(*cp, 6))
 436                         return(NULL);
 437                 if (ns_nprint(cp + 6, bp) == NULL)
 438                         return(NULL);
 439                 printf(":%d %d %d", EXTRACT_16BITS(cp + 4),
 440                         EXTRACT_16BITS(cp), EXTRACT_16BITS(cp + 2));
 441                 break;
 442
 443 #ifdef INET6
 444         case T_AAAA:
 445                 if (!TTEST2(*cp, sizeof(struct in6_addr)))
 446                         return(NULL);
 447                 printf(" %s", ip6addr_string(cp));
 448                 break;
 449
 450         case T_A6:
 451             {
 452                 struct in6_addr a;
 453                 int pbit, pbyte;
 454
 455                 if (!TTEST2(*cp, 1))
 456                         return(NULL);
 457                 pbit = *cp;
 458                 pbyte = (pbit & ~7) / 8;
 459                 if (pbit > 128) {
 460                         printf(" %u(bad plen)", pbit);
 461                         break;
 462                 } else if (pbit < 128) {
 463                         if (!TTEST2(*(cp + 1), sizeof(a) - pbyte))
 464                                 return(NULL);
 465                         memset(&a, 0, sizeof(a));
 466                         memcpy(&a.s6_addr[pbyte], cp + 1, sizeof(a) - pbyte);
 467                         printf(" %u %s", pbit, ip6addr_string(&a));
 468                 }
 469                 if (pbit > 0) {
 470                         putchar(' ');
 471                         if (ns_nprint(cp + 1 + sizeof(a) - pbyte, bp) == NULL)
 472                                 return(NULL);
 473                 }
 474                 break;
 475             }
 476 #endif /*INET6*/
 477
 478         case T_OPT:
 479                 printf(" UDPsize=%u", class);
 480                 break;
 481
 482         case T_UNSPECA:         /* One long string */
 483                 if (!TTEST2(*cp, len))
 484                         return(NULL);
 485                 if (fn_printn(cp, len, snapend))
 486                         return(NULL);
 487                 break;
 488
 489         case T_TSIG:
 490             {
 491                 if (cp + len > snapend)
 492                         return(NULL);
 493                 if (!vflag)
 494                         break;
 495                 putchar(' ');
 496                 if ((cp = ns_nprint(cp, bp)) == NULL)
 497                         return(NULL);
 498                 cp += 6;
 499                 if (!TTEST2(*cp, 2))
 500                         return(NULL);
 501                 printf(" fudge=%u", EXTRACT_16BITS(cp));
 502                 cp += 2;
 503                 if (!TTEST2(*cp, 2))
 504                         return(NULL);
 505                 printf(" maclen=%u", EXTRACT_16BITS(cp));
 506                 cp += 2 + EXTRACT_16BITS(cp);
 507                 if (!TTEST2(*cp, 2))
 508                         return(NULL);
 509                 printf(" origid=%u", EXTRACT_16BITS(cp));
 510                 cp += 2;
 511                 if (!TTEST2(*cp, 2))
 512                         return(NULL);
 513                 printf(" error=%u", EXTRACT_16BITS(cp));
 514                 cp += 2;
 515                 if (!TTEST2(*cp, 2))
 516                         return(NULL);
 517                 printf(" otherlen=%u", EXTRACT_16BITS(cp));
 518                 cp += 2;
 519             }
 520         }
 521         return (rp);            /* XXX This isn't always right */
 522 }
 523
 524 void
 525 ns_print(register const u_char *bp, u_int length, int is_mdns)
 526 {
 527         register const HEADER *np;
 528         register int qdcount, ancount, nscount, arcount;
 529         register const u_char *cp;
 530         u_int16_t b2;
 531
 532         np = (const HEADER *)bp;
 533         TCHECK(*np);
 534         /* get the byte-order right */
 535         qdcount = EXTRACT_16BITS(&np->qdcount);
 536         ancount = EXTRACT_16BITS(&np->ancount);
 537         nscount = EXTRACT_16BITS(&np->nscount);
 538         arcount = EXTRACT_16BITS(&np->arcount);
 539
 540         if (DNS_QR(np)) {
 541                 /* this is a response */
 542                 printf(" %d%s%s%s%s%s%s",
 543                         EXTRACT_16BITS(&np->id),
 544                         ns_ops[DNS_OPCODE(np)],
 545                         ns_resp[DNS_RCODE(np)],
 546                         DNS_AA(np)? "*" : "",
 547                         DNS_RA(np)? "" : "-",
 548                         DNS_TC(np)? "|" : "",
 549                         DNS_AD(np)? "$" : "");
 550
 551                 if (qdcount != 1)
 552                         printf(" [%dq]", qdcount);
 553                 /* Print QUESTION section on -vv */
 554                 cp = (const u_char *)(np + 1);
 555                 while (qdcount--) {
 556                         if (qdcount < EXTRACT_16BITS(&np->qdcount) - 1)
 557                                 putchar(',');
 558                         if (vflag > 1) {
 559                                 fputs(" q:", stdout);
 560                                 if ((cp = ns_qprint(cp, bp, is_mdns)) == NULL)
 561                                         goto trunc;
 562                         } else {
 563                                 if ((cp = ns_nskip(cp)) == NULL)
 564                                         goto trunc;
 565                                 cp += 4;        /* skip QTYPE and QCLASS */
 566                         }
 567                 }
 568                 printf(" %d/%d/%d", ancount, nscount, arcount);
 569                 if (ancount--) {
 570                         if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 571                                 goto trunc;
 572                         while (cp < snapend && ancount--) {
 573                                 putchar(',');
 574                                 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 575                                         goto trunc;
 576                         }
 577                 }
 578                 if (ancount > 0)
 579                         goto trunc;
 580                 /* Print NS and AR sections on -vv */
 581                 if (vflag > 1) {
 582                         if (cp < snapend && nscount--) {
 583                                 fputs(" ns:", stdout);
 584                                 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 585                                         goto trunc;
 586                                 while (cp < snapend && nscount--) {
 587                                         putchar(',');
 588                                         if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 589                                                 goto trunc;
 590                                 }
 591                         }
 592                         if (nscount > 0)
 593                                 goto trunc;
 594                         if (cp < snapend && arcount--) {
 595                                 fputs(" ar:", stdout);
 596                                 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 597                                         goto trunc;
 598                                 while (cp < snapend && arcount--) {
 599                                         putchar(',');
 600                                         if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 601                                                 goto trunc;
 602                                 }
 603                         }
 604                         if (arcount > 0)
 605                                 goto trunc;
 606                 }
 607         }
 608         else {
 609                 /* this is a request */
 610                 printf(" %d%s%s%s", EXTRACT_16BITS(&np->id), ns_ops[DNS_OPCODE(np)],
 611                     DNS_RD(np) ? "+" : "",
 612                     DNS_CD(np) ? "%" : "");
 613
 614                 /* any weirdness? */
 615                 b2 = EXTRACT_16BITS(((u_short *)np)+1);
 616                 if (b2 & 0x6cf)
 617                         printf(" [b2&3=0x%x]", b2);
 618
 619                 if (DNS_OPCODE(np) == IQUERY) {
 620                         if (qdcount)
 621                                 printf(" [%dq]", qdcount);
 622                         if (ancount != 1)
 623                                 printf(" [%da]", ancount);
 624                 }
 625                 else {
 626                         if (ancount)
 627                                 printf(" [%da]", ancount);
 628                         if (qdcount != 1)
 629                                 printf(" [%dq]", qdcount);
 630                 }
 631                 if (nscount)
 632                         printf(" [%dn]", nscount);
 633                 if (arcount)
 634                         printf(" [%dau]", arcount);
 635
 636                 cp = (const u_char *)(np + 1);
 637                 if (qdcount--) {
 638                         cp = ns_qprint(cp, (const u_char *)np, is_mdns);
 639                         if (!cp)
 640                                 goto trunc;
 641                         while (cp < snapend && qdcount--) {
 642                                 cp = ns_qprint((const u_char *)cp,
 643                                                (const u_char *)np,
 644                                                is_mdns);
 645                                 if (!cp)
 646                                         goto trunc;
 647                         }
 648                 }
 649                 if (qdcount > 0)
 650                         goto trunc;
 651
 652                 /* Print remaining sections on -vv */
 653                 if (vflag > 1) {
 654                         if (ancount--) {
 655                                 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 656                                         goto trunc;
 657                                 while (cp < snapend && ancount--) {
 658                                         putchar(',');
 659                                         if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 660                                                 goto trunc;
 661                                 }
 662                         }
 663                         if (ancount > 0)
 664                                 goto trunc;
 665                         if (cp < snapend && nscount--) {
 666                                 fputs(" ns:", stdout);
 667                                 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 668                                         goto trunc;
 669                                 while (nscount-- && cp < snapend) {
 670                                         putchar(',');
 671                                         if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 672                                                 goto trunc;
 673                                 }
 674                         }
 675                         if (nscount > 0)
 676                                 goto trunc;
 677                         if (cp < snapend && arcount--) {
 678                                 fputs(" ar:", stdout);
 679                                 if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 680                                         goto trunc;
 681                                 while (cp < snapend && arcount--) {
 682                                         putchar(',');
 683                                         if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 684                                                 goto trunc;
 685                                 }
 686                         }
 687                         if (arcount > 0)
 688                                 goto trunc;
 689                 }
 690         }
 691         printf(" (%d)", length);
 692         return;
 693
 694   trunc:
 695         printf("[|domain]");
 696         return;
 697 }