2 * Copyright (C) 2004, 2007 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 1998-2001 Internet Software Consortium.
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.
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.
18 /* $Id: ptr_12.c,v 1.43 2007/06/19 23:47:17 tbox Exp $ */
20 /* Reviewed: Thu Mar 16 14:05:12 PST 2000 by explorer */
22 #ifndef RDATA_GENERIC_PTR_12_C
23 #define RDATA_GENERIC_PTR_12_C
25 #define RRTYPE_PTR_ATTRIBUTES (0)
27 static inline isc_result_t
28 fromtext_ptr(ARGS_FROMTEXT) {
39 RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
42 dns_name_init(&name, NULL);
43 buffer_fromregion(&buffer, &token.value.as_region);
44 origin = (origin != NULL) ? origin : dns_rootname;
45 RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target));
46 if (rdclass == dns_rdataclass_in &&
47 (options & DNS_RDATA_CHECKNAMES) != 0 &&
48 (options & DNS_RDATA_CHECKREVERSE) != 0) {
50 ok = dns_name_ishostname(&name, ISC_FALSE);
51 if (!ok && (options & DNS_RDATA_CHECKNAMESFAIL) != 0)
52 RETTOK(DNS_R_BADNAME);
53 if (!ok && callbacks != NULL)
54 warn_badname(&name, lexer, callbacks);
56 return (ISC_R_SUCCESS);
59 static inline isc_result_t
60 totext_ptr(ARGS_TOTEXT) {
66 REQUIRE(rdata->type == 12);
67 REQUIRE(rdata->length != 0);
69 dns_name_init(&name, NULL);
70 dns_name_init(&prefix, NULL);
72 dns_rdata_toregion(rdata, ®ion);
73 dns_name_fromregion(&name, ®ion);
75 sub = name_prefix(&name, tctx->origin, &prefix);
77 return (dns_name_totext(&prefix, sub, target));
80 static inline isc_result_t
81 fromwire_ptr(ARGS_FROMWIRE) {
89 dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14);
91 dns_name_init(&name, NULL);
92 return (dns_name_fromwire(&name, source, dctx, options, target));
95 static inline isc_result_t
96 towire_ptr(ARGS_TOWIRE) {
98 dns_offsets_t offsets;
101 REQUIRE(rdata->type == 12);
102 REQUIRE(rdata->length != 0);
104 dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14);
106 dns_name_init(&name, offsets);
107 dns_rdata_toregion(rdata, ®ion);
108 dns_name_fromregion(&name, ®ion);
110 return (dns_name_towire(&name, cctx, target));
114 compare_ptr(ARGS_COMPARE) {
117 isc_region_t region1;
118 isc_region_t region2;
120 REQUIRE(rdata1->type == rdata2->type);
121 REQUIRE(rdata1->rdclass == rdata2->rdclass);
122 REQUIRE(rdata1->type == 12);
123 REQUIRE(rdata1->length != 0);
124 REQUIRE(rdata2->length != 0);
126 dns_name_init(&name1, NULL);
127 dns_name_init(&name2, NULL);
129 dns_rdata_toregion(rdata1, ®ion1);
130 dns_rdata_toregion(rdata2, ®ion2);
132 dns_name_fromregion(&name1, ®ion1);
133 dns_name_fromregion(&name2, ®ion2);
135 return (dns_name_rdatacompare(&name1, &name2));
138 static inline isc_result_t
139 fromstruct_ptr(ARGS_FROMSTRUCT) {
140 dns_rdata_ptr_t *ptr = source;
144 REQUIRE(source != NULL);
145 REQUIRE(ptr->common.rdtype == type);
146 REQUIRE(ptr->common.rdclass == rdclass);
151 dns_name_toregion(&ptr->ptr, ®ion);
152 return (isc_buffer_copyregion(target, ®ion));
155 static inline isc_result_t
156 tostruct_ptr(ARGS_TOSTRUCT) {
158 dns_rdata_ptr_t *ptr = target;
161 REQUIRE(rdata->type == 12);
162 REQUIRE(target != NULL);
163 REQUIRE(rdata->length != 0);
165 ptr->common.rdclass = rdata->rdclass;
166 ptr->common.rdtype = rdata->type;
167 ISC_LINK_INIT(&ptr->common, link);
169 dns_name_init(&name, NULL);
170 dns_rdata_toregion(rdata, ®ion);
171 dns_name_fromregion(&name, ®ion);
172 dns_name_init(&ptr->ptr, NULL);
173 RETERR(name_duporclone(&name, mctx, &ptr->ptr));
175 return (ISC_R_SUCCESS);
179 freestruct_ptr(ARGS_FREESTRUCT) {
180 dns_rdata_ptr_t *ptr = source;
182 REQUIRE(source != NULL);
183 REQUIRE(ptr->common.rdtype == 12);
185 if (ptr->mctx == NULL)
188 dns_name_free(&ptr->ptr, ptr->mctx);
192 static inline isc_result_t
193 additionaldata_ptr(ARGS_ADDLDATA) {
194 REQUIRE(rdata->type == 12);
200 return (ISC_R_SUCCESS);
203 static inline isc_result_t
204 digest_ptr(ARGS_DIGEST) {
208 REQUIRE(rdata->type == 12);
210 dns_rdata_toregion(rdata, &r);
211 dns_name_init(&name, NULL);
212 dns_name_fromregion(&name, &r);
214 return (dns_name_digest(&name, digest, arg));
217 static inline isc_boolean_t
218 checkowner_ptr(ARGS_CHECKOWNER) {
230 static unsigned char ip6_arpa_data[] = "\003IP6\004ARPA";
231 static unsigned char ip6_arpa_offsets[] = { 0, 4, 9 };
232 static const dns_name_t ip6_arpa =
235 ip6_arpa_data, 10, 3,
236 DNS_NAMEATTR_READONLY | DNS_NAMEATTR_ABSOLUTE,
237 ip6_arpa_offsets, NULL,
238 {(void *)-1, (void *)-1},
242 static unsigned char ip6_int_data[] = "\003IP6\003INT";
243 static unsigned char ip6_int_offsets[] = { 0, 4, 8 };
244 static const dns_name_t ip6_int =
248 DNS_NAMEATTR_READONLY | DNS_NAMEATTR_ABSOLUTE,
249 ip6_int_offsets, NULL,
250 {(void *)-1, (void *)-1},
254 static unsigned char in_addr_arpa_data[] = "\007IN-ADDR\004ARPA";
255 static unsigned char in_addr_arpa_offsets[] = { 0, 8, 13 };
256 static const dns_name_t in_addr_arpa =
259 in_addr_arpa_data, 14, 3,
260 DNS_NAMEATTR_READONLY | DNS_NAMEATTR_ABSOLUTE,
261 in_addr_arpa_offsets, NULL,
262 {(void *)-1, (void *)-1},
266 static inline isc_boolean_t
267 checknames_ptr(ARGS_CHECKNAMES) {
271 REQUIRE(rdata->type == 12);
273 if (rdata->rdclass != dns_rdataclass_in)
276 if (dns_name_issubdomain(owner, &in_addr_arpa) ||
277 dns_name_issubdomain(owner, &ip6_arpa) ||
278 dns_name_issubdomain(owner, &ip6_int)) {
279 dns_rdata_toregion(rdata, ®ion);
280 dns_name_init(&name, NULL);
281 dns_name_fromregion(&name, ®ion);
282 if (!dns_name_ishostname(&name, ISC_FALSE)) {
284 dns_name_clone(&name, bad);
291 #endif /* RDATA_GENERIC_PTR_12_C */