2 * Copyright (C) 2004, 2005, 2007, 2009, 2012-2014 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 1998-2002 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.
20 /* Reviewed: Thu Mar 16 14:06:44 PST 2000 by gson */
24 #ifndef RDATA_GENERIC_OPT_41_C
25 #define RDATA_GENERIC_OPT_41_C
27 #define RRTYPE_OPT_ATTRIBUTES (DNS_RDATATYPEATTR_SINGLETON | \
28 DNS_RDATATYPEATTR_META | \
29 DNS_RDATATYPEATTR_NOTQUESTION)
31 static inline isc_result_t
32 fromtext_opt(ARGS_FROMTEXT) {
34 * OPT records do not have a text format.
47 return (ISC_R_NOTIMPLEMENTED);
50 static inline isc_result_t
51 totext_opt(ARGS_TOTEXT) {
56 char buf[sizeof("64000 64000")];
59 * OPT records do not have a text format.
62 REQUIRE(rdata->type == 41);
64 dns_rdata_toregion(rdata, &r);
65 while (r.length > 0) {
66 option = uint16_fromregion(&r);
67 isc_region_consume(&r, 2);
68 length = uint16_fromregion(&r);
69 isc_region_consume(&r, 2);
70 sprintf(buf, "%u %u", option, length);
71 RETERR(str_totext(buf, target));
72 INSIST(r.length >= length);
74 if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
75 RETERR(str_totext(" (", target));
76 RETERR(str_totext(tctx->linebreak, target));
79 RETERR(isc_base64_totext(&or, tctx->width - 2,
80 tctx->linebreak, target));
81 isc_region_consume(&r, length);
82 if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
83 RETERR(str_totext(" )", target));
86 RETERR(str_totext(" ", target));
89 return (ISC_R_SUCCESS);
92 static inline isc_result_t
93 fromwire_opt(ARGS_FROMWIRE) {
107 isc_buffer_activeregion(source, &sregion);
109 while (sregion.length != 0) {
110 if (sregion.length < 4)
111 return (ISC_R_UNEXPECTEDEND);
112 opt = uint16_fromregion(&sregion);
113 isc_region_consume(&sregion, 2);
114 length = uint16_fromregion(&sregion);
115 isc_region_consume(&sregion, 2);
117 if (sregion.length < length)
118 return (ISC_R_UNEXPECTEDEND);
120 case DNS_OPT_CLIENT_SUBNET: {
124 isc_uint8_t addrbytes;
127 return (DNS_R_FORMERR);
128 family = uint16_fromregion(&sregion);
129 isc_region_consume(&sregion, 2);
130 addrlen = uint8_fromregion(&sregion);
131 isc_region_consume(&sregion, 1);
132 scope = uint8_fromregion(&sregion);
133 isc_region_consume(&sregion, 1);
136 if (addrlen > 32U || scope > 32U)
137 return (DNS_R_FORMERR);
140 if (addrlen > 128U || scope > 128U)
141 return (DNS_R_FORMERR);
144 addrbytes = (addrlen + 7) / 8;
145 if (addrbytes + 4 != length)
146 return (DNS_R_FORMERR);
147 isc_region_consume(&sregion, addrbytes);
151 isc_region_consume(&sregion, length);
157 isc_buffer_activeregion(source, &sregion);
158 isc_buffer_availableregion(target, &tregion);
159 if (tregion.length < total)
160 return (ISC_R_NOSPACE);
161 memmove(tregion.base, sregion.base, total);
162 isc_buffer_forward(source, total);
163 isc_buffer_add(target, total);
165 return (ISC_R_SUCCESS);
168 static inline isc_result_t
169 towire_opt(ARGS_TOWIRE) {
171 REQUIRE(rdata->type == 41);
175 return (mem_tobuffer(target, rdata->data, rdata->length));
179 compare_opt(ARGS_COMPARE) {
183 REQUIRE(rdata1->type == rdata2->type);
184 REQUIRE(rdata1->rdclass == rdata2->rdclass);
185 REQUIRE(rdata1->type == 41);
187 dns_rdata_toregion(rdata1, &r1);
188 dns_rdata_toregion(rdata2, &r2);
189 return (isc_region_compare(&r1, &r2));
192 static inline isc_result_t
193 fromstruct_opt(ARGS_FROMSTRUCT) {
194 dns_rdata_opt_t *opt = source;
199 REQUIRE(source != NULL);
200 REQUIRE(opt->common.rdtype == type);
201 REQUIRE(opt->common.rdclass == rdclass);
202 REQUIRE(opt->options != NULL || opt->length == 0);
207 region.base = opt->options;
208 region.length = opt->length;
209 while (region.length >= 4) {
210 isc_region_consume(®ion, 2); /* opt */
211 length = uint16_fromregion(®ion);
212 isc_region_consume(®ion, 2);
213 if (region.length < length)
214 return (ISC_R_UNEXPECTEDEND);
215 isc_region_consume(®ion, length);
217 if (region.length != 0)
218 return (ISC_R_UNEXPECTEDEND);
220 return (mem_tobuffer(target, opt->options, opt->length));
223 static inline isc_result_t
224 tostruct_opt(ARGS_TOSTRUCT) {
225 dns_rdata_opt_t *opt = target;
228 REQUIRE(rdata->type == 41);
229 REQUIRE(target != NULL);
231 opt->common.rdclass = rdata->rdclass;
232 opt->common.rdtype = rdata->type;
233 ISC_LINK_INIT(&opt->common, link);
235 dns_rdata_toregion(rdata, &r);
236 opt->length = r.length;
237 opt->options = mem_maybedup(mctx, r.base, r.length);
238 if (opt->options == NULL)
239 return (ISC_R_NOMEMORY);
243 return (ISC_R_SUCCESS);
247 freestruct_opt(ARGS_FREESTRUCT) {
248 dns_rdata_opt_t *opt = source;
250 REQUIRE(source != NULL);
251 REQUIRE(opt->common.rdtype == 41);
253 if (opt->mctx == NULL)
256 if (opt->options != NULL)
257 isc_mem_free(opt->mctx, opt->options);
261 static inline isc_result_t
262 additionaldata_opt(ARGS_ADDLDATA) {
263 REQUIRE(rdata->type == 41);
269 return (ISC_R_SUCCESS);
272 static inline isc_result_t
273 digest_opt(ARGS_DIGEST) {
276 * OPT records are not digested.
279 REQUIRE(rdata->type == 41);
285 return (ISC_R_NOTIMPLEMENTED);
288 static inline isc_boolean_t
289 checkowner_opt(ARGS_CHECKOWNER) {
297 return (dns_name_equal(name, dns_rootname));
300 static inline isc_boolean_t
301 checknames_opt(ARGS_CHECKNAMES) {
303 REQUIRE(rdata->type == 41);
313 casecompare_opt(ARGS_COMPARE) {
314 return (compare_opt(rdata1, rdata2));
317 #endif /* RDATA_GENERIC_OPT_41_C */