2 * Copyright (C) 2004, 2005, 2007, 2009, 2012 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) {
106 isc_buffer_activeregion(source, &sregion);
108 while (sregion.length != 0) {
109 if (sregion.length < 4)
110 return (ISC_R_UNEXPECTEDEND);
112 * Eat the 16bit option code. There is nothing to
113 * be done with it currently.
115 isc_region_consume(&sregion, 2);
116 length = uint16_fromregion(&sregion);
117 isc_region_consume(&sregion, 2);
119 if (sregion.length < length)
120 return (ISC_R_UNEXPECTEDEND);
121 isc_region_consume(&sregion, length);
125 isc_buffer_activeregion(source, &sregion);
126 isc_buffer_availableregion(target, &tregion);
127 if (tregion.length < total)
128 return (ISC_R_NOSPACE);
129 memcpy(tregion.base, sregion.base, total);
130 isc_buffer_forward(source, total);
131 isc_buffer_add(target, total);
133 return (ISC_R_SUCCESS);
136 static inline isc_result_t
137 towire_opt(ARGS_TOWIRE) {
139 REQUIRE(rdata->type == 41);
143 return (mem_tobuffer(target, rdata->data, rdata->length));
147 compare_opt(ARGS_COMPARE) {
151 REQUIRE(rdata1->type == rdata2->type);
152 REQUIRE(rdata1->rdclass == rdata2->rdclass);
153 REQUIRE(rdata1->type == 41);
155 dns_rdata_toregion(rdata1, &r1);
156 dns_rdata_toregion(rdata2, &r2);
157 return (isc_region_compare(&r1, &r2));
160 static inline isc_result_t
161 fromstruct_opt(ARGS_FROMSTRUCT) {
162 dns_rdata_opt_t *opt = source;
167 REQUIRE(source != NULL);
168 REQUIRE(opt->common.rdtype == type);
169 REQUIRE(opt->common.rdclass == rdclass);
170 REQUIRE(opt->options != NULL || opt->length == 0);
175 region.base = opt->options;
176 region.length = opt->length;
177 while (region.length >= 4) {
178 isc_region_consume(®ion, 2); /* opt */
179 length = uint16_fromregion(®ion);
180 isc_region_consume(®ion, 2);
181 if (region.length < length)
182 return (ISC_R_UNEXPECTEDEND);
183 isc_region_consume(®ion, length);
185 if (region.length != 0)
186 return (ISC_R_UNEXPECTEDEND);
188 return (mem_tobuffer(target, opt->options, opt->length));
191 static inline isc_result_t
192 tostruct_opt(ARGS_TOSTRUCT) {
193 dns_rdata_opt_t *opt = target;
196 REQUIRE(rdata->type == 41);
197 REQUIRE(target != NULL);
199 opt->common.rdclass = rdata->rdclass;
200 opt->common.rdtype = rdata->type;
201 ISC_LINK_INIT(&opt->common, link);
203 dns_rdata_toregion(rdata, &r);
204 opt->length = r.length;
205 opt->options = mem_maybedup(mctx, r.base, r.length);
206 if (opt->options == NULL)
207 return (ISC_R_NOMEMORY);
211 return (ISC_R_SUCCESS);
215 freestruct_opt(ARGS_FREESTRUCT) {
216 dns_rdata_opt_t *opt = source;
218 REQUIRE(source != NULL);
219 REQUIRE(opt->common.rdtype == 41);
221 if (opt->mctx == NULL)
224 if (opt->options != NULL)
225 isc_mem_free(opt->mctx, opt->options);
229 static inline isc_result_t
230 additionaldata_opt(ARGS_ADDLDATA) {
231 REQUIRE(rdata->type == 41);
237 return (ISC_R_SUCCESS);
240 static inline isc_result_t
241 digest_opt(ARGS_DIGEST) {
244 * OPT records are not digested.
247 REQUIRE(rdata->type == 41);
253 return (ISC_R_NOTIMPLEMENTED);
256 static inline isc_boolean_t
257 checkowner_opt(ARGS_CHECKOWNER) {
265 return (dns_name_equal(name, dns_rootname));
268 static inline isc_boolean_t
269 checknames_opt(ARGS_CHECKNAMES) {
271 REQUIRE(rdata->type == 41);
281 casecompare_opt(ARGS_COMPARE) {
282 return (compare_opt(rdata1, rdata2));
285 #endif /* RDATA_GENERIC_OPT_41_C */