1 /* $NetBSD: kx_36.c,v 1.1 2024/02/18 20:57:46 christos Exp $ */
2
3 /*
4 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
5 *
6 * SPDX-License-Identifier: MPL-2.0
7 *
8 * This Source Code Form is subject to the terms of the Mozilla Public
9 * License, v. 2.0. If a copy of the MPL was not distributed with this
10 * file, you can obtain one at https://mozilla.org/MPL/2.0/.
11 *
12 * See the COPYRIGHT file distributed with this work for additional
13 * information regarding copyright ownership.
14 */
15
16 /* RFC2230 */
17
18 #ifndef RDATA_IN_1_KX_36_C
19 #define RDATA_IN_1_KX_36_C
20
21 #define RRTYPE_KX_ATTRIBUTES (0)
22
23 static isc_result_t
fromtext_in_kx(ARGS_FROMTEXT)24 fromtext_in_kx(ARGS_FROMTEXT) {
25 isc_token_t token;
26 dns_name_t name;
27 isc_buffer_t buffer;
28
29 REQUIRE(type == dns_rdatatype_kx);
30 REQUIRE(rdclass == dns_rdataclass_in);
31
32 UNUSED(type);
33 UNUSED(rdclass);
34 UNUSED(callbacks);
35
36 RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
37 false));
38 if (token.value.as_ulong > 0xffffU) {
39 RETTOK(ISC_R_RANGE);
40 }
41 RETERR(uint16_tobuffer(token.value.as_ulong, target));
42
43 RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
44 false));
45 dns_name_init(&name, NULL);
46 buffer_fromregion(&buffer, &token.value.as_region);
47 if (origin == NULL) {
48 origin = dns_rootname;
49 }
50 RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target));
51 return (ISC_R_SUCCESS);
52 }
53
54 static isc_result_t
totext_in_kx(ARGS_TOTEXT)55 totext_in_kx(ARGS_TOTEXT) {
56 isc_region_t region;
57 dns_name_t name;
58 dns_name_t prefix;
59 bool sub;
60 char buf[sizeof("64000")];
61 unsigned short num;
62
63 REQUIRE(rdata->type == dns_rdatatype_kx);
64 REQUIRE(rdata->rdclass == dns_rdataclass_in);
65 REQUIRE(rdata->length != 0);
66
67 dns_name_init(&name, NULL);
68 dns_name_init(&prefix, NULL);
69
70 dns_rdata_toregion(rdata, ®ion);
71 num = uint16_fromregion(®ion);
72 isc_region_consume(®ion, 2);
73 snprintf(buf, sizeof(buf), "%u", num);
74 RETERR(str_totext(buf, target));
75
76 RETERR(str_totext(" ", target));
77
78 dns_name_fromregion(&name, ®ion);
79 sub = name_prefix(&name, tctx->origin, &prefix);
80 return (dns_name_totext(&prefix, sub, target));
81 }
82
83 static isc_result_t
fromwire_in_kx(ARGS_FROMWIRE)84 fromwire_in_kx(ARGS_FROMWIRE) {
85 dns_name_t name;
86 isc_region_t sregion;
87
88 REQUIRE(type == dns_rdatatype_kx);
89 REQUIRE(rdclass == dns_rdataclass_in);
90
91 UNUSED(type);
92 UNUSED(rdclass);
93
94 dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);
95
96 dns_name_init(&name, NULL);
97
98 isc_buffer_activeregion(source, &sregion);
99 if (sregion.length < 2) {
100 return (ISC_R_UNEXPECTEDEND);
101 }
102 RETERR(mem_tobuffer(target, sregion.base, 2));
103 isc_buffer_forward(source, 2);
104 return (dns_name_fromwire(&name, source, dctx, options, target));
105 }
106
107 static isc_result_t
towire_in_kx(ARGS_TOWIRE)108 towire_in_kx(ARGS_TOWIRE) {
109 dns_name_t name;
110 dns_offsets_t offsets;
111 isc_region_t region;
112
113 REQUIRE(rdata->type == dns_rdatatype_kx);
114 REQUIRE(rdata->rdclass == dns_rdataclass_in);
115 REQUIRE(rdata->length != 0);
116
117 dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
118 dns_rdata_toregion(rdata, ®ion);
119 RETERR(mem_tobuffer(target, region.base, 2));
120 isc_region_consume(®ion, 2);
121
122 dns_name_init(&name, offsets);
123 dns_name_fromregion(&name, ®ion);
124
125 return (dns_name_towire(&name, cctx, target));
126 }
127
128 static int
compare_in_kx(ARGS_COMPARE)129 compare_in_kx(ARGS_COMPARE) {
130 dns_name_t name1;
131 dns_name_t name2;
132 isc_region_t region1;
133 isc_region_t region2;
134 int order;
135
136 REQUIRE(rdata1->type == rdata2->type);
137 REQUIRE(rdata1->rdclass == rdata2->rdclass);
138 REQUIRE(rdata1->type == dns_rdatatype_kx);
139 REQUIRE(rdata1->rdclass == dns_rdataclass_in);
140 REQUIRE(rdata1->length != 0);
141 REQUIRE(rdata2->length != 0);
142
143 order = memcmp(rdata1->data, rdata2->data, 2);
144 if (order != 0) {
145 return (order < 0 ? -1 : 1);
146 }
147
148 dns_name_init(&name1, NULL);
149 dns_name_init(&name2, NULL);
150
151 dns_rdata_toregion(rdata1, ®ion1);
152 dns_rdata_toregion(rdata2, ®ion2);
153
154 isc_region_consume(®ion1, 2);
155 isc_region_consume(®ion2, 2);
156
157 dns_name_fromregion(&name1, ®ion1);
158 dns_name_fromregion(&name2, ®ion2);
159
160 return (dns_name_rdatacompare(&name1, &name2));
161 }
162
163 static isc_result_t
fromstruct_in_kx(ARGS_FROMSTRUCT)164 fromstruct_in_kx(ARGS_FROMSTRUCT) {
165 dns_rdata_in_kx_t *kx = source;
166 isc_region_t region;
167
168 REQUIRE(type == dns_rdatatype_kx);
169 REQUIRE(rdclass == dns_rdataclass_in);
170 REQUIRE(kx != NULL);
171 REQUIRE(kx->common.rdtype == type);
172 REQUIRE(kx->common.rdclass == rdclass);
173
174 UNUSED(type);
175 UNUSED(rdclass);
176
177 RETERR(uint16_tobuffer(kx->preference, target));
178 dns_name_toregion(&kx->exchange, ®ion);
179 return (isc_buffer_copyregion(target, ®ion));
180 }
181
182 static isc_result_t
tostruct_in_kx(ARGS_TOSTRUCT)183 tostruct_in_kx(ARGS_TOSTRUCT) {
184 isc_region_t region;
185 dns_rdata_in_kx_t *kx = target;
186 dns_name_t name;
187
188 REQUIRE(rdata->type == dns_rdatatype_kx);
189 REQUIRE(rdata->rdclass == dns_rdataclass_in);
190 REQUIRE(kx != NULL);
191 REQUIRE(rdata->length != 0);
192
193 kx->common.rdclass = rdata->rdclass;
194 kx->common.rdtype = rdata->type;
195 ISC_LINK_INIT(&kx->common, link);
196
197 dns_name_init(&name, NULL);
198 dns_rdata_toregion(rdata, ®ion);
199
200 kx->preference = uint16_fromregion(®ion);
201 isc_region_consume(®ion, 2);
202
203 dns_name_fromregion(&name, ®ion);
204 dns_name_init(&kx->exchange, NULL);
205 RETERR(name_duporclone(&name, mctx, &kx->exchange));
206 kx->mctx = mctx;
207 return (ISC_R_SUCCESS);
208 }
209
210 static void
freestruct_in_kx(ARGS_FREESTRUCT)211 freestruct_in_kx(ARGS_FREESTRUCT) {
212 dns_rdata_in_kx_t *kx = source;
213
214 REQUIRE(kx != NULL);
215 REQUIRE(kx->common.rdclass == dns_rdataclass_in);
216 REQUIRE(kx->common.rdtype == dns_rdatatype_kx);
217
218 if (kx->mctx == NULL) {
219 return;
220 }
221
222 dns_name_free(&kx->exchange, kx->mctx);
223 kx->mctx = NULL;
224 }
225
226 static isc_result_t
additionaldata_in_kx(ARGS_ADDLDATA)227 additionaldata_in_kx(ARGS_ADDLDATA) {
228 dns_name_t name;
229 dns_offsets_t offsets;
230 isc_region_t region;
231
232 REQUIRE(rdata->type == dns_rdatatype_kx);
233 REQUIRE(rdata->rdclass == dns_rdataclass_in);
234
235 dns_name_init(&name, offsets);
236 dns_rdata_toregion(rdata, ®ion);
237 isc_region_consume(®ion, 2);
238 dns_name_fromregion(&name, ®ion);
239
240 return ((add)(arg, &name, dns_rdatatype_a));
241 }
242
243 static isc_result_t
digest_in_kx(ARGS_DIGEST)244 digest_in_kx(ARGS_DIGEST) {
245 isc_region_t r1, r2;
246 dns_name_t name;
247
248 REQUIRE(rdata->type == dns_rdatatype_kx);
249 REQUIRE(rdata->rdclass == dns_rdataclass_in);
250
251 dns_rdata_toregion(rdata, &r1);
252 r2 = r1;
253 isc_region_consume(&r2, 2);
254 r1.length = 2;
255 RETERR((digest)(arg, &r1));
256 dns_name_init(&name, NULL);
257 dns_name_fromregion(&name, &r2);
258 return (dns_name_digest(&name, digest, arg));
259 }
260
261 static bool
checkowner_in_kx(ARGS_CHECKOWNER)262 checkowner_in_kx(ARGS_CHECKOWNER) {
263 REQUIRE(type == dns_rdatatype_kx);
264 REQUIRE(rdclass == dns_rdataclass_in);
265
266 UNUSED(name);
267 UNUSED(type);
268 UNUSED(rdclass);
269 UNUSED(wildcard);
270
271 return (true);
272 }
273
274 static bool
checknames_in_kx(ARGS_CHECKNAMES)275 checknames_in_kx(ARGS_CHECKNAMES) {
276 REQUIRE(rdata->type == dns_rdatatype_kx);
277 REQUIRE(rdata->rdclass == dns_rdataclass_in);
278
279 UNUSED(rdata);
280 UNUSED(owner);
281 UNUSED(bad);
282
283 return (true);
284 }
285
286 static int
casecompare_in_kx(ARGS_COMPARE)287 casecompare_in_kx(ARGS_COMPARE) {
288 return (compare_in_kx(rdata1, rdata2));
289 }
290
291 #endif /* RDATA_IN_1_KX_36_C */
292