1 /*
2 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
9 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
10 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
11 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
12 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
13 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
14 * PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 /* $Id: soa_6.c,v 1.9 2020/09/14 08:40:43 florian Exp $ */
18
19 /* Reviewed: Thu Mar 16 15:18:32 PST 2000 by explorer */
20
21 #ifndef RDATA_GENERIC_SOA_6_C
22 #define RDATA_GENERIC_SOA_6_C
23
24 static const char *soa_fieldnames[5] = {
25 "serial", "refresh", "retry", "expire", "minimum"
26 };
27
28 static inline isc_result_t
totext_soa(ARGS_TOTEXT)29 totext_soa(ARGS_TOTEXT) {
30 isc_region_t dregion;
31 dns_name_t mname;
32 dns_name_t rname;
33 dns_name_t prefix;
34 int sub;
35 int i;
36 int multiline;
37 int comm;
38
39 REQUIRE(rdata->type == dns_rdatatype_soa);
40 REQUIRE(rdata->length != 0);
41
42 multiline = (tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0;
43 if (multiline)
44 comm = (tctx->flags & DNS_STYLEFLAG_RRCOMMENT) != 0;
45 else
46 comm = 0;
47
48 dns_name_init(&mname, NULL);
49 dns_name_init(&rname, NULL);
50 dns_name_init(&prefix, NULL);
51
52 dns_rdata_toregion(rdata, &dregion);
53
54 dns_name_fromregion(&mname, &dregion);
55 isc_region_consume(&dregion, name_length(&mname));
56
57 dns_name_fromregion(&rname, &dregion);
58 isc_region_consume(&dregion, name_length(&rname));
59
60 sub = name_prefix(&mname, tctx->origin, &prefix);
61 RETERR(dns_name_totext(&prefix, sub, target));
62
63 RETERR(isc_str_tobuffer(" ", target));
64
65 sub = name_prefix(&rname, tctx->origin, &prefix);
66 RETERR(dns_name_totext(&prefix, sub, target));
67
68 if (multiline)
69 RETERR(isc_str_tobuffer(" (" , target));
70 RETERR(isc_str_tobuffer(tctx->linebreak, target));
71
72 for (i = 0; i < 5; i++) {
73 char buf[sizeof("0123456789 ; ")];
74 unsigned long num;
75 num = uint32_fromregion(&dregion);
76 isc_region_consume(&dregion, 4);
77 snprintf(buf, sizeof(buf), comm ? "%-10lu ; " : "%lu", num);
78 RETERR(isc_str_tobuffer(buf, target));
79 if (comm) {
80 RETERR(isc_str_tobuffer(soa_fieldnames[i], target));
81 /* Print times in week/day/hour/minute/second form */
82 if (i >= 1) {
83 RETERR(isc_str_tobuffer(" (", target));
84 RETERR(dns_ttl_totext(num, 1, target));
85 RETERR(isc_str_tobuffer(")", target));
86 }
87 RETERR(isc_str_tobuffer(tctx->linebreak, target));
88 } else if (i < 4) {
89 RETERR(isc_str_tobuffer(tctx->linebreak, target));
90 }
91 }
92
93 if (multiline)
94 RETERR(isc_str_tobuffer(")", target));
95
96 return (ISC_R_SUCCESS);
97 }
98
99 static inline isc_result_t
fromwire_soa(ARGS_FROMWIRE)100 fromwire_soa(ARGS_FROMWIRE) {
101 dns_name_t mname;
102 dns_name_t rname;
103 isc_region_t sregion;
104 isc_region_t tregion;
105
106 REQUIRE(type == dns_rdatatype_soa);
107
108 UNUSED(type);
109 UNUSED(rdclass);
110
111 dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14);
112
113 dns_name_init(&mname, NULL);
114 dns_name_init(&rname, NULL);
115
116 RETERR(dns_name_fromwire(&mname, source, dctx, options, target));
117 RETERR(dns_name_fromwire(&rname, source, dctx, options, target));
118
119 isc_buffer_activeregion(source, &sregion);
120 isc_buffer_availableregion(target, &tregion);
121
122 if (sregion.length < 20)
123 return (ISC_R_UNEXPECTEDEND);
124 if (tregion.length < 20)
125 return (ISC_R_NOSPACE);
126
127 memmove(tregion.base, sregion.base, 20);
128 isc_buffer_forward(source, 20);
129 isc_buffer_add(target, 20);
130
131 return (ISC_R_SUCCESS);
132 }
133
134 static inline isc_result_t
towire_soa(ARGS_TOWIRE)135 towire_soa(ARGS_TOWIRE) {
136 isc_region_t sregion;
137 isc_region_t tregion;
138 dns_name_t mname;
139 dns_name_t rname;
140 dns_offsets_t moffsets;
141 dns_offsets_t roffsets;
142
143 REQUIRE(rdata->type == dns_rdatatype_soa);
144 REQUIRE(rdata->length != 0);
145
146 dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14);
147
148 dns_name_init(&mname, moffsets);
149 dns_name_init(&rname, roffsets);
150
151 dns_rdata_toregion(rdata, &sregion);
152
153 dns_name_fromregion(&mname, &sregion);
154 isc_region_consume(&sregion, name_length(&mname));
155 RETERR(dns_name_towire(&mname, cctx, target));
156
157 dns_name_fromregion(&rname, &sregion);
158 isc_region_consume(&sregion, name_length(&rname));
159 RETERR(dns_name_towire(&rname, cctx, target));
160
161 isc_buffer_availableregion(target, &tregion);
162 if (tregion.length < 20)
163 return (ISC_R_NOSPACE);
164
165 memmove(tregion.base, sregion.base, 20);
166 isc_buffer_add(target, 20);
167 return (ISC_R_SUCCESS);
168 }
169
170 static inline isc_result_t
fromstruct_soa(ARGS_FROMSTRUCT)171 fromstruct_soa(ARGS_FROMSTRUCT) {
172 dns_rdata_soa_t *soa = source;
173 isc_region_t region;
174
175 REQUIRE(type == dns_rdatatype_soa);
176 REQUIRE(source != NULL);
177 REQUIRE(soa->common.rdtype == type);
178 REQUIRE(soa->common.rdclass == rdclass);
179
180 UNUSED(type);
181 UNUSED(rdclass);
182
183 dns_name_toregion(&soa->origin, ®ion);
184 RETERR(isc_buffer_copyregion(target, ®ion));
185 dns_name_toregion(&soa->contact, ®ion);
186 RETERR(isc_buffer_copyregion(target, ®ion));
187 RETERR(uint32_tobuffer(soa->serial, target));
188 RETERR(uint32_tobuffer(soa->refresh, target));
189 RETERR(uint32_tobuffer(soa->retry, target));
190 RETERR(uint32_tobuffer(soa->expire, target));
191 return (uint32_tobuffer(soa->minimum, target));
192 }
193
194 static inline isc_result_t
tostruct_soa(ARGS_TOSTRUCT)195 tostruct_soa(ARGS_TOSTRUCT) {
196 isc_region_t region;
197 dns_rdata_soa_t *soa = target;
198 dns_name_t name;
199 isc_result_t result;
200
201 REQUIRE(rdata->type == dns_rdatatype_soa);
202 REQUIRE(target != NULL);
203 REQUIRE(rdata->length != 0);
204
205 soa->common.rdclass = rdata->rdclass;
206 soa->common.rdtype = rdata->type;
207 ISC_LINK_INIT(&soa->common, link);
208
209 dns_rdata_toregion(rdata, ®ion);
210
211 dns_name_init(&name, NULL);
212 dns_name_fromregion(&name, ®ion);
213 isc_region_consume(®ion, name_length(&name));
214 dns_name_init(&soa->origin, NULL);
215 RETERR(name_duporclone(&name, &soa->origin));
216
217 dns_name_fromregion(&name, ®ion);
218 isc_region_consume(®ion, name_length(&name));
219 dns_name_init(&soa->contact, NULL);
220 result = name_duporclone(&name, &soa->contact);
221 if (result != ISC_R_SUCCESS)
222 goto cleanup;
223
224 soa->serial = uint32_fromregion(®ion);
225 isc_region_consume(®ion, 4);
226
227 soa->refresh = uint32_fromregion(®ion);
228 isc_region_consume(®ion, 4);
229
230 soa->retry = uint32_fromregion(®ion);
231 isc_region_consume(®ion, 4);
232
233 soa->expire = uint32_fromregion(®ion);
234 isc_region_consume(®ion, 4);
235
236 soa->minimum = uint32_fromregion(®ion);
237
238 return (ISC_R_SUCCESS);
239
240 cleanup:
241 dns_name_free(&soa->origin);
242 return (ISC_R_NOMEMORY);
243 }
244
245 static inline void
freestruct_soa(ARGS_FREESTRUCT)246 freestruct_soa(ARGS_FREESTRUCT) {
247 dns_rdata_soa_t *soa = source;
248
249 REQUIRE(source != NULL);
250 REQUIRE(soa->common.rdtype == dns_rdatatype_soa);
251
252 dns_name_free(&soa->origin);
253 dns_name_free(&soa->contact);
254 }
255
256 #endif /* RDATA_GENERIC_SOA_6_C */
257