/contrib/bind9/lib/dns/rdata/generic/nxt_30.c

https://bitbucket.org/freebsd/freebsd-head/ · C · 333 lines · 244 code · 60 blank · 29 comment · 73 complexity · 9cdd5cb97b9b856905392f06fc1a6a6c MD5 · raw file

  1. /*
  2. * Copyright (C) 2004, 2005, 2007, 2009 Internet Systems Consortium, Inc. ("ISC")
  3. * Copyright (C) 1999-2003 Internet Software Consortium.
  4. *
  5. * Permission to use, copy, modify, and/or distribute this software for any
  6. * purpose with or without fee is hereby granted, provided that the above
  7. * copyright notice and this permission notice appear in all copies.
  8. *
  9. * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  10. * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  11. * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  12. * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  13. * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  14. * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  15. * PERFORMANCE OF THIS SOFTWARE.
  16. */
  17. /* $Id: nxt_30.c,v 1.65 2009/12/04 22:06:37 tbox Exp $ */
  18. /* reviewed: Wed Mar 15 18:21:15 PST 2000 by brister */
  19. /* RFC2535 */
  20. #ifndef RDATA_GENERIC_NXT_30_C
  21. #define RDATA_GENERIC_NXT_30_C
  22. /*
  23. * The attributes do not include DNS_RDATATYPEATTR_SINGLETON
  24. * because we must be able to handle a parent/child NXT pair.
  25. */
  26. #define RRTYPE_NXT_ATTRIBUTES (0)
  27. static inline isc_result_t
  28. fromtext_nxt(ARGS_FROMTEXT) {
  29. isc_token_t token;
  30. dns_name_t name;
  31. isc_buffer_t buffer;
  32. char *e;
  33. unsigned char bm[8*1024]; /* 64k bits */
  34. dns_rdatatype_t covered;
  35. dns_rdatatype_t maxcovered = 0;
  36. isc_boolean_t first = ISC_TRUE;
  37. long n;
  38. REQUIRE(type == 30);
  39. UNUSED(type);
  40. UNUSED(rdclass);
  41. UNUSED(callbacks);
  42. /*
  43. * Next domain.
  44. */
  45. RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
  46. ISC_FALSE));
  47. dns_name_init(&name, NULL);
  48. buffer_fromregion(&buffer, &token.value.as_region);
  49. origin = (origin != NULL) ? origin : dns_rootname;
  50. RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target));
  51. memset(bm, 0, sizeof(bm));
  52. do {
  53. RETERR(isc_lex_getmastertoken(lexer, &token,
  54. isc_tokentype_string, ISC_TRUE));
  55. if (token.type != isc_tokentype_string)
  56. break;
  57. n = strtol(DNS_AS_STR(token), &e, 10);
  58. if (e != DNS_AS_STR(token) && *e == '\0') {
  59. covered = (dns_rdatatype_t)n;
  60. } else if (dns_rdatatype_fromtext(&covered,
  61. &token.value.as_textregion) == DNS_R_UNKNOWN)
  62. RETTOK(DNS_R_UNKNOWN);
  63. /*
  64. * NXT is only specified for types 1..127.
  65. */
  66. if (covered < 1 || covered > 127)
  67. return (ISC_R_RANGE);
  68. if (first || covered > maxcovered)
  69. maxcovered = covered;
  70. first = ISC_FALSE;
  71. bm[covered/8] |= (0x80>>(covered%8));
  72. } while (1);
  73. isc_lex_ungettoken(lexer, &token);
  74. if (first)
  75. return (ISC_R_SUCCESS);
  76. n = (maxcovered + 8) / 8;
  77. return (mem_tobuffer(target, bm, n));
  78. }
  79. static inline isc_result_t
  80. totext_nxt(ARGS_TOTEXT) {
  81. isc_region_t sr;
  82. unsigned int i, j;
  83. dns_name_t name;
  84. dns_name_t prefix;
  85. isc_boolean_t sub;
  86. REQUIRE(rdata->type == 30);
  87. REQUIRE(rdata->length != 0);
  88. dns_name_init(&name, NULL);
  89. dns_name_init(&prefix, NULL);
  90. dns_rdata_toregion(rdata, &sr);
  91. dns_name_fromregion(&name, &sr);
  92. isc_region_consume(&sr, name_length(&name));
  93. sub = name_prefix(&name, tctx->origin, &prefix);
  94. RETERR(dns_name_totext(&prefix, sub, target));
  95. for (i = 0; i < sr.length; i++) {
  96. if (sr.base[i] != 0)
  97. for (j = 0; j < 8; j++)
  98. if ((sr.base[i] & (0x80 >> j)) != 0) {
  99. dns_rdatatype_t t = i * 8 + j;
  100. RETERR(str_totext(" ", target));
  101. if (dns_rdatatype_isknown(t)) {
  102. RETERR(dns_rdatatype_totext(t,
  103. target));
  104. } else {
  105. char buf[sizeof("65535")];
  106. sprintf(buf, "%u", t);
  107. RETERR(str_totext(buf,
  108. target));
  109. }
  110. }
  111. }
  112. return (ISC_R_SUCCESS);
  113. }
  114. static inline isc_result_t
  115. fromwire_nxt(ARGS_FROMWIRE) {
  116. isc_region_t sr;
  117. dns_name_t name;
  118. REQUIRE(type == 30);
  119. UNUSED(type);
  120. UNUSED(rdclass);
  121. dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);
  122. dns_name_init(&name, NULL);
  123. RETERR(dns_name_fromwire(&name, source, dctx, options, target));
  124. isc_buffer_activeregion(source, &sr);
  125. if (sr.length > 0 && (sr.base[0] & 0x80) == 0 &&
  126. ((sr.length > 16) || sr.base[sr.length - 1] == 0))
  127. return (DNS_R_BADBITMAP);
  128. RETERR(mem_tobuffer(target, sr.base, sr.length));
  129. isc_buffer_forward(source, sr.length);
  130. return (ISC_R_SUCCESS);
  131. }
  132. static inline isc_result_t
  133. towire_nxt(ARGS_TOWIRE) {
  134. isc_region_t sr;
  135. dns_name_t name;
  136. dns_offsets_t offsets;
  137. REQUIRE(rdata->type == 30);
  138. REQUIRE(rdata->length != 0);
  139. dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
  140. dns_name_init(&name, offsets);
  141. dns_rdata_toregion(rdata, &sr);
  142. dns_name_fromregion(&name, &sr);
  143. isc_region_consume(&sr, name_length(&name));
  144. RETERR(dns_name_towire(&name, cctx, target));
  145. return (mem_tobuffer(target, sr.base, sr.length));
  146. }
  147. static inline int
  148. compare_nxt(ARGS_COMPARE) {
  149. isc_region_t r1;
  150. isc_region_t r2;
  151. dns_name_t name1;
  152. dns_name_t name2;
  153. int order;
  154. REQUIRE(rdata1->type == rdata2->type);
  155. REQUIRE(rdata1->rdclass == rdata2->rdclass);
  156. REQUIRE(rdata1->type == 30);
  157. REQUIRE(rdata1->length != 0);
  158. REQUIRE(rdata2->length != 0);
  159. dns_name_init(&name1, NULL);
  160. dns_name_init(&name2, NULL);
  161. dns_rdata_toregion(rdata1, &r1);
  162. dns_rdata_toregion(rdata2, &r2);
  163. dns_name_fromregion(&name1, &r1);
  164. dns_name_fromregion(&name2, &r2);
  165. order = dns_name_rdatacompare(&name1, &name2);
  166. if (order != 0)
  167. return (order);
  168. return (isc_region_compare(&r1, &r2));
  169. }
  170. static inline isc_result_t
  171. fromstruct_nxt(ARGS_FROMSTRUCT) {
  172. dns_rdata_nxt_t *nxt = source;
  173. isc_region_t region;
  174. REQUIRE(type == 30);
  175. REQUIRE(source != NULL);
  176. REQUIRE(nxt->common.rdtype == type);
  177. REQUIRE(nxt->common.rdclass == rdclass);
  178. REQUIRE(nxt->typebits != NULL || nxt->len == 0);
  179. if (nxt->typebits != NULL && (nxt->typebits[0] & 0x80) == 0) {
  180. REQUIRE(nxt->len <= 16);
  181. REQUIRE(nxt->typebits[nxt->len - 1] != 0);
  182. }
  183. UNUSED(type);
  184. UNUSED(rdclass);
  185. dns_name_toregion(&nxt->next, &region);
  186. RETERR(isc_buffer_copyregion(target, &region));
  187. return (mem_tobuffer(target, nxt->typebits, nxt->len));
  188. }
  189. static inline isc_result_t
  190. tostruct_nxt(ARGS_TOSTRUCT) {
  191. isc_region_t region;
  192. dns_rdata_nxt_t *nxt = target;
  193. dns_name_t name;
  194. REQUIRE(rdata->type == 30);
  195. REQUIRE(target != NULL);
  196. REQUIRE(rdata->length != 0);
  197. nxt->common.rdclass = rdata->rdclass;
  198. nxt->common.rdtype = rdata->type;
  199. ISC_LINK_INIT(&nxt->common, link);
  200. dns_name_init(&name, NULL);
  201. dns_rdata_toregion(rdata, &region);
  202. dns_name_fromregion(&name, &region);
  203. isc_region_consume(&region, name_length(&name));
  204. dns_name_init(&nxt->next, NULL);
  205. RETERR(name_duporclone(&name, mctx, &nxt->next));
  206. nxt->len = region.length;
  207. nxt->typebits = mem_maybedup(mctx, region.base, region.length);
  208. if (nxt->typebits == NULL)
  209. goto cleanup;
  210. nxt->mctx = mctx;
  211. return (ISC_R_SUCCESS);
  212. cleanup:
  213. if (mctx != NULL)
  214. dns_name_free(&nxt->next, mctx);
  215. return (ISC_R_NOMEMORY);
  216. }
  217. static inline void
  218. freestruct_nxt(ARGS_FREESTRUCT) {
  219. dns_rdata_nxt_t *nxt = source;
  220. REQUIRE(source != NULL);
  221. REQUIRE(nxt->common.rdtype == 30);
  222. if (nxt->mctx == NULL)
  223. return;
  224. dns_name_free(&nxt->next, nxt->mctx);
  225. if (nxt->typebits != NULL)
  226. isc_mem_free(nxt->mctx, nxt->typebits);
  227. nxt->mctx = NULL;
  228. }
  229. static inline isc_result_t
  230. additionaldata_nxt(ARGS_ADDLDATA) {
  231. REQUIRE(rdata->type == 30);
  232. UNUSED(rdata);
  233. UNUSED(add);
  234. UNUSED(arg);
  235. return (ISC_R_SUCCESS);
  236. }
  237. static inline isc_result_t
  238. digest_nxt(ARGS_DIGEST) {
  239. isc_region_t r;
  240. dns_name_t name;
  241. isc_result_t result;
  242. REQUIRE(rdata->type == 30);
  243. dns_rdata_toregion(rdata, &r);
  244. dns_name_init(&name, NULL);
  245. dns_name_fromregion(&name, &r);
  246. result = dns_name_digest(&name, digest, arg);
  247. if (result != ISC_R_SUCCESS)
  248. return (result);
  249. isc_region_consume(&r, name_length(&name));
  250. return ((digest)(arg, &r));
  251. }
  252. static inline isc_boolean_t
  253. checkowner_nxt(ARGS_CHECKOWNER) {
  254. REQUIRE(type == 30);
  255. UNUSED(name);
  256. UNUSED(type);
  257. UNUSED(rdclass);
  258. UNUSED(wildcard);
  259. return (ISC_TRUE);
  260. }
  261. static inline isc_boolean_t
  262. checknames_nxt(ARGS_CHECKNAMES) {
  263. REQUIRE(rdata->type == 30);
  264. UNUSED(rdata);
  265. UNUSED(owner);
  266. UNUSED(bad);
  267. return (ISC_TRUE);
  268. }
  269. static inline int
  270. casecompare_nxt(ARGS_COMPARE) {
  271. return (compare_nxt(rdata1, rdata2));
  272. }
  273. #endif /* RDATA_GENERIC_NXT_30_C */