The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 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_ = |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 24 | "@(#) $Header: /tcpdump/master/tcpdump/print-domain.c,v 1.98 2007-12-09 01:40:32 guy Exp $ (LBL)"; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 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 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 147 | const u_char * |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 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 */ |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 245 | const struct tok ns_type2str[] = { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 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 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 310 | const struct tok ns_class2str[] = { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 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 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 390 | if (typ == T_OPT) { |
| 391 | /* get opt flags */ |
| 392 | cp += 2; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 393 | opt_flags = EXTRACT_16BITS(cp); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 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 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 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); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 420 | printf(" %s", intoa(htonl(EXTRACT_32BITS(cp)))); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 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: |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 487 | { |
| 488 | struct in6_addr addr; |
| 489 | char ntop_buf[INET6_ADDRSTRLEN]; |
| 490 | |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 491 | if (!TTEST2(*cp, sizeof(struct in6_addr))) |
| 492 | return(NULL); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 493 | memcpy(&addr, cp, sizeof(struct in6_addr)); |
| 494 | printf(" %s", |
| 495 | inet_ntop(AF_INET6, &addr, ntop_buf, sizeof(ntop_buf))); |
| 496 | |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 497 | break; |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 498 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 499 | |
| 500 | case T_A6: |
| 501 | { |
| 502 | struct in6_addr a; |
| 503 | int pbit, pbyte; |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 504 | char ntop_buf[INET6_ADDRSTRLEN]; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 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); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 518 | printf(" %u %s", pbit, |
| 519 | inet_ntop(AF_INET6, &a, ntop_buf, sizeof(ntop_buf))); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 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 | } |