1/*	$NetBSD: afsdb_18.c,v 1.1 2024/02/18 20:57:40 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/* RFC1183 */
17
18#ifndef RDATA_GENERIC_AFSDB_18_C
19#define RDATA_GENERIC_AFSDB_18_C
20
21#define RRTYPE_AFSDB_ATTRIBUTES (0)
22
23static isc_result_t
24fromtext_afsdb(ARGS_FROMTEXT) {
25	isc_token_t token;
26	isc_buffer_t buffer;
27	dns_name_t name;
28	bool ok;
29
30	REQUIRE(type == dns_rdatatype_afsdb);
31
32	UNUSED(type);
33	UNUSED(rdclass);
34	UNUSED(callbacks);
35
36	/*
37	 * Subtype.
38	 */
39	RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
40				      false));
41	if (token.value.as_ulong > 0xffffU) {
42		RETTOK(ISC_R_RANGE);
43	}
44	RETERR(uint16_tobuffer(token.value.as_ulong, target));
45
46	/*
47	 * Hostname.
48	 */
49	RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
50				      false));
51	dns_name_init(&name, NULL);
52	buffer_fromregion(&buffer, &token.value.as_region);
53	if (origin == NULL) {
54		origin = dns_rootname;
55	}
56	RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target));
57	ok = true;
58	if ((options & DNS_RDATA_CHECKNAMES) != 0) {
59		ok = dns_name_ishostname(&name, false);
60	}
61	if (!ok && (options & DNS_RDATA_CHECKNAMESFAIL) != 0) {
62		RETTOK(DNS_R_BADNAME);
63	}
64	if (!ok && callbacks != NULL) {
65		warn_badname(&name, lexer, callbacks);
66	}
67	return (ISC_R_SUCCESS);
68}
69
70static isc_result_t
71totext_afsdb(ARGS_TOTEXT) {
72	dns_name_t name;
73	dns_name_t prefix;
74	isc_region_t region;
75	char buf[sizeof("64000 ")];
76	bool sub;
77	unsigned int num;
78
79	REQUIRE(rdata->type == dns_rdatatype_afsdb);
80	REQUIRE(rdata->length != 0);
81
82	dns_name_init(&name, NULL);
83	dns_name_init(&prefix, NULL);
84
85	dns_rdata_toregion(rdata, &region);
86	num = uint16_fromregion(&region);
87	isc_region_consume(&region, 2);
88	snprintf(buf, sizeof(buf), "%u ", num);
89	RETERR(str_totext(buf, target));
90	dns_name_fromregion(&name, &region);
91	sub = name_prefix(&name, tctx->origin, &prefix);
92	return (dns_name_totext(&prefix, sub, target));
93}
94
95static isc_result_t
96fromwire_afsdb(ARGS_FROMWIRE) {
97	dns_name_t name;
98	isc_region_t sr;
99	isc_region_t tr;
100
101	REQUIRE(type == dns_rdatatype_afsdb);
102
103	UNUSED(type);
104	UNUSED(rdclass);
105
106	dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);
107
108	dns_name_init(&name, NULL);
109
110	isc_buffer_activeregion(source, &sr);
111	isc_buffer_availableregion(target, &tr);
112	if (tr.length < 2) {
113		return (ISC_R_NOSPACE);
114	}
115	if (sr.length < 2) {
116		return (ISC_R_UNEXPECTEDEND);
117	}
118	memmove(tr.base, sr.base, 2);
119	isc_buffer_forward(source, 2);
120	isc_buffer_add(target, 2);
121	return (dns_name_fromwire(&name, source, dctx, options, target));
122}
123
124static isc_result_t
125towire_afsdb(ARGS_TOWIRE) {
126	isc_region_t tr;
127	isc_region_t sr;
128	dns_name_t name;
129	dns_offsets_t offsets;
130
131	REQUIRE(rdata->type == dns_rdatatype_afsdb);
132	REQUIRE(rdata->length != 0);
133
134	dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
135	isc_buffer_availableregion(target, &tr);
136	dns_rdata_toregion(rdata, &sr);
137	if (tr.length < 2) {
138		return (ISC_R_NOSPACE);
139	}
140	memmove(tr.base, sr.base, 2);
141	isc_region_consume(&sr, 2);
142	isc_buffer_add(target, 2);
143
144	dns_name_init(&name, offsets);
145	dns_name_fromregion(&name, &sr);
146
147	return (dns_name_towire(&name, cctx, target));
148}
149
150static int
151compare_afsdb(ARGS_COMPARE) {
152	int result;
153	dns_name_t name1;
154	dns_name_t name2;
155	isc_region_t region1;
156	isc_region_t region2;
157
158	REQUIRE(rdata1->type == rdata2->type);
159	REQUIRE(rdata1->rdclass == rdata2->rdclass);
160	REQUIRE(rdata1->type == dns_rdatatype_afsdb);
161	REQUIRE(rdata1->length != 0);
162	REQUIRE(rdata2->length != 0);
163
164	result = memcmp(rdata1->data, rdata2->data, 2);
165	if (result != 0) {
166		return (result < 0 ? -1 : 1);
167	}
168
169	dns_name_init(&name1, NULL);
170	dns_name_init(&name2, NULL);
171
172	dns_rdata_toregion(rdata1, &region1);
173	dns_rdata_toregion(rdata2, &region2);
174
175	isc_region_consume(&region1, 2);
176	isc_region_consume(&region2, 2);
177
178	dns_name_fromregion(&name1, &region1);
179	dns_name_fromregion(&name2, &region2);
180
181	return (dns_name_rdatacompare(&name1, &name2));
182}
183
184static isc_result_t
185fromstruct_afsdb(ARGS_FROMSTRUCT) {
186	dns_rdata_afsdb_t *afsdb = source;
187	isc_region_t region;
188
189	REQUIRE(type == dns_rdatatype_afsdb);
190	REQUIRE(afsdb != NULL);
191	REQUIRE(afsdb->common.rdclass == rdclass);
192	REQUIRE(afsdb->common.rdtype == type);
193
194	UNUSED(type);
195	UNUSED(rdclass);
196
197	RETERR(uint16_tobuffer(afsdb->subtype, target));
198	dns_name_toregion(&afsdb->server, &region);
199	return (isc_buffer_copyregion(target, &region));
200}
201
202static isc_result_t
203tostruct_afsdb(ARGS_TOSTRUCT) {
204	isc_region_t region;
205	dns_rdata_afsdb_t *afsdb = target;
206	dns_name_t name;
207
208	REQUIRE(rdata->type == dns_rdatatype_afsdb);
209	REQUIRE(afsdb != NULL);
210	REQUIRE(rdata->length != 0);
211
212	afsdb->common.rdclass = rdata->rdclass;
213	afsdb->common.rdtype = rdata->type;
214	ISC_LINK_INIT(&afsdb->common, link);
215
216	dns_name_init(&afsdb->server, NULL);
217
218	dns_rdata_toregion(rdata, &region);
219
220	afsdb->subtype = uint16_fromregion(&region);
221	isc_region_consume(&region, 2);
222
223	dns_name_init(&name, NULL);
224	dns_name_fromregion(&name, &region);
225
226	RETERR(name_duporclone(&name, mctx, &afsdb->server));
227	afsdb->mctx = mctx;
228	return (ISC_R_SUCCESS);
229}
230
231static void
232freestruct_afsdb(ARGS_FREESTRUCT) {
233	dns_rdata_afsdb_t *afsdb = source;
234
235	REQUIRE(afsdb != NULL);
236	REQUIRE(afsdb->common.rdtype == dns_rdatatype_afsdb);
237
238	if (afsdb->mctx == NULL) {
239		return;
240	}
241
242	dns_name_free(&afsdb->server, afsdb->mctx);
243	afsdb->mctx = NULL;
244}
245
246static isc_result_t
247additionaldata_afsdb(ARGS_ADDLDATA) {
248	dns_name_t name;
249	dns_offsets_t offsets;
250	isc_region_t region;
251
252	REQUIRE(rdata->type == dns_rdatatype_afsdb);
253
254	dns_name_init(&name, offsets);
255	dns_rdata_toregion(rdata, &region);
256	isc_region_consume(&region, 2);
257	dns_name_fromregion(&name, &region);
258
259	return ((add)(arg, &name, dns_rdatatype_a));
260}
261
262static isc_result_t
263digest_afsdb(ARGS_DIGEST) {
264	isc_region_t r1, r2;
265	dns_name_t name;
266
267	REQUIRE(rdata->type == dns_rdatatype_afsdb);
268
269	dns_rdata_toregion(rdata, &r1);
270	r2 = r1;
271	isc_region_consume(&r2, 2);
272	r1.length = 2;
273	RETERR((digest)(arg, &r1));
274	dns_name_init(&name, NULL);
275	dns_name_fromregion(&name, &r2);
276
277	return (dns_name_digest(&name, digest, arg));
278}
279
280static bool
281checkowner_afsdb(ARGS_CHECKOWNER) {
282	REQUIRE(type == dns_rdatatype_afsdb);
283
284	UNUSED(name);
285	UNUSED(type);
286	UNUSED(rdclass);
287	UNUSED(wildcard);
288
289	return (true);
290}
291
292static bool
293checknames_afsdb(ARGS_CHECKNAMES) {
294	isc_region_t region;
295	dns_name_t name;
296
297	REQUIRE(rdata->type == dns_rdatatype_afsdb);
298
299	UNUSED(owner);
300
301	dns_rdata_toregion(rdata, &region);
302	isc_region_consume(&region, 2);
303	dns_name_init(&name, NULL);
304	dns_name_fromregion(&name, &region);
305	if (!dns_name_ishostname(&name, false)) {
306		if (bad != NULL) {
307			dns_name_clone(&name, bad);
308		}
309		return (false);
310	}
311	return (true);
312}
313
314static int
315casecompare_afsdb(ARGS_COMPARE) {
316	return (compare_afsdb(rdata1, rdata2));
317}
318#endif /* RDATA_GENERIC_AFSDB_18_C */
319