2 * Copyright (C) 2004, 2005, 2007, 2009, 2011-2014 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 if (tctx->width == 0) /* No splitting */
80 RETERR(isc_base64_totext(&or, 60, "", target));
82 RETERR(isc_base64_totext(&or, tctx->width - 2,
85 isc_region_consume(&r, length);
86 if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
87 RETERR(str_totext(" )", target));
90 RETERR(str_totext(" ", target));
93 return (ISC_R_SUCCESS);
96 static inline isc_result_t
97 fromwire_opt(ARGS_FROMWIRE) {
111 isc_buffer_activeregion(source, &sregion);
113 while (sregion.length != 0) {
114 if (sregion.length < 4)
115 return (ISC_R_UNEXPECTEDEND);
116 opt = uint16_fromregion(&sregion);
117 isc_region_consume(&sregion, 2);
118 length = uint16_fromregion(&sregion);
119 isc_region_consume(&sregion, 2);
121 if (sregion.length < length)
122 return (ISC_R_UNEXPECTEDEND);
124 case DNS_OPT_CLIENT_SUBNET: {
128 isc_uint8_t addrbytes;
131 return (DNS_R_FORMERR);
132 family = uint16_fromregion(&sregion);
133 isc_region_consume(&sregion, 2);
134 addrlen = uint8_fromregion(&sregion);
135 isc_region_consume(&sregion, 1);
136 scope = uint8_fromregion(&sregion);
137 isc_region_consume(&sregion, 1);
140 if (addrlen > 32U || scope > 32U)
141 return (DNS_R_FORMERR);
144 if (addrlen > 128U || scope > 128U)
145 return (DNS_R_FORMERR);
148 addrbytes = (addrlen + 7) / 8;
149 if (addrbytes + 4 != length)
150 return (DNS_R_FORMERR);
151 isc_region_consume(&sregion, addrbytes);
156 * Request has zero length. Response is 32 bits.
158 if (length != 0 && length != 4)
159 return (DNS_R_FORMERR);
160 isc_region_consume(&sregion, length);
163 isc_region_consume(&sregion, length);
169 isc_buffer_activeregion(source, &sregion);
170 isc_buffer_availableregion(target, &tregion);
171 if (tregion.length < total)
172 return (ISC_R_NOSPACE);
173 memmove(tregion.base, sregion.base, total);
174 isc_buffer_forward(source, total);
175 isc_buffer_add(target, total);
177 return (ISC_R_SUCCESS);
180 static inline isc_result_t
181 towire_opt(ARGS_TOWIRE) {
183 REQUIRE(rdata->type == 41);
187 return (mem_tobuffer(target, rdata->data, rdata->length));
191 compare_opt(ARGS_COMPARE) {
195 REQUIRE(rdata1->type == rdata2->type);
196 REQUIRE(rdata1->rdclass == rdata2->rdclass);
197 REQUIRE(rdata1->type == 41);
199 dns_rdata_toregion(rdata1, &r1);
200 dns_rdata_toregion(rdata2, &r2);
201 return (isc_region_compare(&r1, &r2));
204 static inline isc_result_t
205 fromstruct_opt(ARGS_FROMSTRUCT) {
206 dns_rdata_opt_t *opt = source;
211 REQUIRE(source != NULL);
212 REQUIRE(opt->common.rdtype == type);
213 REQUIRE(opt->common.rdclass == rdclass);
214 REQUIRE(opt->options != NULL || opt->length == 0);
219 region.base = opt->options;
220 region.length = opt->length;
221 while (region.length >= 4) {
222 isc_region_consume(®ion, 2); /* opt */
223 length = uint16_fromregion(®ion);
224 isc_region_consume(®ion, 2);
225 if (region.length < length)
226 return (ISC_R_UNEXPECTEDEND);
227 isc_region_consume(®ion, length);
229 if (region.length != 0)
230 return (ISC_R_UNEXPECTEDEND);
232 return (mem_tobuffer(target, opt->options, opt->length));
235 static inline isc_result_t
236 tostruct_opt(ARGS_TOSTRUCT) {
237 dns_rdata_opt_t *opt = target;
240 REQUIRE(rdata->type == 41);
241 REQUIRE(target != NULL);
243 opt->common.rdclass = rdata->rdclass;
244 opt->common.rdtype = rdata->type;
245 ISC_LINK_INIT(&opt->common, link);
247 dns_rdata_toregion(rdata, &r);
248 opt->length = r.length;
249 opt->options = mem_maybedup(mctx, r.base, r.length);
250 if (opt->options == NULL)
251 return (ISC_R_NOMEMORY);
255 return (ISC_R_SUCCESS);
259 freestruct_opt(ARGS_FREESTRUCT) {
260 dns_rdata_opt_t *opt = source;
262 REQUIRE(source != NULL);
263 REQUIRE(opt->common.rdtype == 41);
265 if (opt->mctx == NULL)
268 if (opt->options != NULL)
269 isc_mem_free(opt->mctx, opt->options);
273 static inline isc_result_t
274 additionaldata_opt(ARGS_ADDLDATA) {
275 REQUIRE(rdata->type == 41);
281 return (ISC_R_SUCCESS);
284 static inline isc_result_t
285 digest_opt(ARGS_DIGEST) {
288 * OPT records are not digested.
291 REQUIRE(rdata->type == 41);
297 return (ISC_R_NOTIMPLEMENTED);
300 static inline isc_boolean_t
301 checkowner_opt(ARGS_CHECKOWNER) {
309 return (dns_name_equal(name, dns_rootname));
312 static inline isc_boolean_t
313 checknames_opt(ARGS_CHECKNAMES) {
315 REQUIRE(rdata->type == 41);
325 casecompare_opt(ARGS_COMPARE) {
326 return (compare_opt(rdata1, rdata2));
329 #endif /* RDATA_GENERIC_OPT_41_C */