/contrib/bind9/lib/dns/rdata/generic/cname_5.c

https://bitbucket.org/freebsd/freebsd-head/ · C · 237 lines · 159 code · 60 blank · 18 comment · 26 complexity · ff5a5c9cb12fe8b31e9174655ab063be MD5 · raw file

  1. /*
  2. * Copyright (C) 2004, 2007, 2009 Internet Systems Consortium, Inc. ("ISC")
  3. * Copyright (C) 1998-2001 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: cname_5.c,v 1.49 2009/12/04 22:06:37 tbox Exp $ */
  18. /* reviewed: Wed Mar 15 16:48:45 PST 2000 by brister */
  19. #ifndef RDATA_GENERIC_CNAME_5_C
  20. #define RDATA_GENERIC_CNAME_5_C
  21. #define RRTYPE_CNAME_ATTRIBUTES \
  22. (DNS_RDATATYPEATTR_EXCLUSIVE | DNS_RDATATYPEATTR_SINGLETON)
  23. static inline isc_result_t
  24. fromtext_cname(ARGS_FROMTEXT) {
  25. isc_token_t token;
  26. dns_name_t name;
  27. isc_buffer_t buffer;
  28. REQUIRE(type == 5);
  29. UNUSED(type);
  30. UNUSED(rdclass);
  31. UNUSED(callbacks);
  32. RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
  33. ISC_FALSE));
  34. dns_name_init(&name, NULL);
  35. buffer_fromregion(&buffer, &token.value.as_region);
  36. origin = (origin != NULL) ? origin : dns_rootname;
  37. RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target));
  38. return (ISC_R_SUCCESS);
  39. }
  40. static inline isc_result_t
  41. totext_cname(ARGS_TOTEXT) {
  42. isc_region_t region;
  43. dns_name_t name;
  44. dns_name_t prefix;
  45. isc_boolean_t sub;
  46. REQUIRE(rdata->type == 5);
  47. REQUIRE(rdata->length != 0);
  48. dns_name_init(&name, NULL);
  49. dns_name_init(&prefix, NULL);
  50. dns_rdata_toregion(rdata, &region);
  51. dns_name_fromregion(&name, &region);
  52. sub = name_prefix(&name, tctx->origin, &prefix);
  53. return (dns_name_totext(&prefix, sub, target));
  54. }
  55. static inline isc_result_t
  56. fromwire_cname(ARGS_FROMWIRE) {
  57. dns_name_t name;
  58. REQUIRE(type == 5);
  59. UNUSED(type);
  60. UNUSED(rdclass);
  61. dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14);
  62. dns_name_init(&name, NULL);
  63. return (dns_name_fromwire(&name, source, dctx, options, target));
  64. }
  65. static inline isc_result_t
  66. towire_cname(ARGS_TOWIRE) {
  67. dns_name_t name;
  68. dns_offsets_t offsets;
  69. isc_region_t region;
  70. REQUIRE(rdata->type == 5);
  71. REQUIRE(rdata->length != 0);
  72. dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14);
  73. dns_name_init(&name, offsets);
  74. dns_rdata_toregion(rdata, &region);
  75. dns_name_fromregion(&name, &region);
  76. return (dns_name_towire(&name, cctx, target));
  77. }
  78. static inline int
  79. compare_cname(ARGS_COMPARE) {
  80. dns_name_t name1;
  81. dns_name_t name2;
  82. isc_region_t region1;
  83. isc_region_t region2;
  84. REQUIRE(rdata1->type == rdata2->type);
  85. REQUIRE(rdata1->rdclass == rdata2->rdclass);
  86. REQUIRE(rdata1->type == 5);
  87. REQUIRE(rdata1->length != 0);
  88. REQUIRE(rdata2->length != 0);
  89. dns_name_init(&name1, NULL);
  90. dns_name_init(&name2, NULL);
  91. dns_rdata_toregion(rdata1, &region1);
  92. dns_rdata_toregion(rdata2, &region2);
  93. dns_name_fromregion(&name1, &region1);
  94. dns_name_fromregion(&name2, &region2);
  95. return (dns_name_rdatacompare(&name1, &name2));
  96. }
  97. static inline isc_result_t
  98. fromstruct_cname(ARGS_FROMSTRUCT) {
  99. dns_rdata_cname_t *cname = source;
  100. isc_region_t region;
  101. REQUIRE(type == 5);
  102. REQUIRE(source != NULL);
  103. REQUIRE(cname->common.rdtype == type);
  104. REQUIRE(cname->common.rdclass == rdclass);
  105. UNUSED(type);
  106. UNUSED(rdclass);
  107. dns_name_toregion(&cname->cname, &region);
  108. return (isc_buffer_copyregion(target, &region));
  109. }
  110. static inline isc_result_t
  111. tostruct_cname(ARGS_TOSTRUCT) {
  112. isc_region_t region;
  113. dns_rdata_cname_t *cname = target;
  114. dns_name_t name;
  115. REQUIRE(rdata->type == 5);
  116. REQUIRE(target != NULL);
  117. REQUIRE(rdata->length != 0);
  118. cname->common.rdclass = rdata->rdclass;
  119. cname->common.rdtype = rdata->type;
  120. ISC_LINK_INIT(&cname->common, link);
  121. dns_name_init(&name, NULL);
  122. dns_rdata_toregion(rdata, &region);
  123. dns_name_fromregion(&name, &region);
  124. dns_name_init(&cname->cname, NULL);
  125. RETERR(name_duporclone(&name, mctx, &cname->cname));
  126. cname->mctx = mctx;
  127. return (ISC_R_SUCCESS);
  128. }
  129. static inline void
  130. freestruct_cname(ARGS_FREESTRUCT) {
  131. dns_rdata_cname_t *cname = source;
  132. REQUIRE(source != NULL);
  133. if (cname->mctx == NULL)
  134. return;
  135. dns_name_free(&cname->cname, cname->mctx);
  136. cname->mctx = NULL;
  137. }
  138. static inline isc_result_t
  139. additionaldata_cname(ARGS_ADDLDATA) {
  140. UNUSED(rdata);
  141. UNUSED(add);
  142. UNUSED(arg);
  143. REQUIRE(rdata->type == 5);
  144. return (ISC_R_SUCCESS);
  145. }
  146. static inline isc_result_t
  147. digest_cname(ARGS_DIGEST) {
  148. isc_region_t r;
  149. dns_name_t name;
  150. REQUIRE(rdata->type == 5);
  151. dns_rdata_toregion(rdata, &r);
  152. dns_name_init(&name, NULL);
  153. dns_name_fromregion(&name, &r);
  154. return (dns_name_digest(&name, digest, arg));
  155. }
  156. static inline isc_boolean_t
  157. checkowner_cname(ARGS_CHECKOWNER) {
  158. REQUIRE(type == 5);
  159. UNUSED(name);
  160. UNUSED(type);
  161. UNUSED(rdclass);
  162. UNUSED(wildcard);
  163. return (ISC_TRUE);
  164. }
  165. static inline isc_boolean_t
  166. checknames_cname(ARGS_CHECKNAMES) {
  167. REQUIRE(rdata->type == 5);
  168. UNUSED(rdata);
  169. UNUSED(owner);
  170. UNUSED(bad);
  171. return (ISC_TRUE);
  172. }
  173. static inline int
  174. casecompare_cname(ARGS_COMPARE) {
  175. return (compare_cname(rdata1, rdata2));
  176. }
  177. #endif /* RDATA_GENERIC_CNAME_5_C */