]>
Commit | Line | Data |
---|---|---|
74b2466e LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | #pragma once | |
4 | ||
5 | /*** | |
6 | This file is part of systemd. | |
7 | ||
8 | Copyright 2014 Lennart Poettering | |
9 | ||
10 | systemd is free software; you can redistribute it and/or modify it | |
11 | under the terms of the GNU Lesser General Public License as published by | |
12 | the Free Software Foundation; either version 2.1 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | systemd is distributed in the hope that it will be useful, but | |
16 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | Lesser General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU Lesser General Public License | |
21 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
22 | ***/ | |
23 | ||
74b2466e LP |
24 | #include <netinet/in.h> |
25 | ||
50f1e641 | 26 | #include "bitmap.h" |
71d35b6b | 27 | #include "dns-type.h" |
322345fd | 28 | #include "hashmap.h" |
623a4c97 | 29 | #include "in-addr-util.h" |
2001c805 | 30 | #include "list.h" |
74b2466e LP |
31 | |
32 | typedef struct DnsResourceKey DnsResourceKey; | |
33 | typedef struct DnsResourceRecord DnsResourceRecord; | |
2001c805 | 34 | typedef struct DnsTxtItem DnsTxtItem; |
74b2466e | 35 | |
8730bccf LP |
36 | /* DNSKEY RR flags */ |
37 | #define DNSKEY_FLAG_ZONE_KEY (UINT16_C(1) << 8) | |
38 | #define DNSKEY_FLAG_SEP (UINT16_C(1) << 0) | |
39 | ||
23502de3 DM |
40 | /* mDNS RR flags */ |
41 | #define MDNS_RR_CACHE_FLUSH (UINT16_C(1) << 15) | |
42 | ||
8730bccf LP |
43 | /* DNSSEC algorithm identifiers, see |
44 | * http://tools.ietf.org/html/rfc4034#appendix-A.1 and | |
45 | * https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml */ | |
46 | enum { | |
47 | DNSSEC_ALGORITHM_RSAMD5 = 1, | |
48 | DNSSEC_ALGORITHM_DH, | |
49 | DNSSEC_ALGORITHM_DSA, | |
50 | DNSSEC_ALGORITHM_ECC, | |
51 | DNSSEC_ALGORITHM_RSASHA1, | |
52 | DNSSEC_ALGORITHM_DSA_NSEC3_SHA1, | |
53 | DNSSEC_ALGORITHM_RSASHA1_NSEC3_SHA1, | |
54 | DNSSEC_ALGORITHM_RSASHA256 = 8, /* RFC 5702 */ | |
55 | DNSSEC_ALGORITHM_RSASHA512 = 10, /* RFC 5702 */ | |
56 | DNSSEC_ALGORITHM_INDIRECT = 252, | |
57 | DNSSEC_ALGORITHM_PRIVATEDNS, | |
58 | DNSSEC_ALGORITHM_PRIVATEOID, | |
59 | _DNSSEC_ALGORITHM_MAX_DEFINED | |
60 | }; | |
61 | ||
62 | /* DNSSEC digest identifiers, see | |
63 | * https://www.iana.org/assignments/ds-rr-types/ds-rr-types.xhtml */ | |
64 | enum { | |
65 | DNSSEC_DIGEST_SHA1 = 1, | |
66 | DNSSEC_DIGEST_SHA256 = 2, | |
af22c65b | 67 | DNSSEC_DIGEST_SHA384 = 4, |
8730bccf LP |
68 | _DNSSEC_DIGEST_MAX_DEFINED |
69 | }; | |
70 | ||
74b2466e | 71 | struct DnsResourceKey { |
faa133f3 LP |
72 | unsigned n_ref; |
73 | uint16_t class, type; | |
74 | char *_name; /* don't access directy, use DNS_RESOURCE_KEY_NAME()! */ | |
74b2466e LP |
75 | }; |
76 | ||
1b4f6e79 LP |
77 | /* Creates a temporary resource key. This is only useful to quickly |
78 | * look up something, without allocating a full DnsResourceKey object | |
79 | * for it. Note that it is not OK to take references to this kind of | |
80 | * resource key object. */ | |
81 | #define DNS_RESOURCE_KEY_CONST(c, t, n) \ | |
82 | ((DnsResourceKey) { \ | |
83 | .n_ref = (unsigned) -1, \ | |
84 | .class = c, \ | |
85 | .type = t, \ | |
86 | ._name = (char*) n, \ | |
87 | }) | |
88 | ||
89 | ||
2001c805 LP |
90 | struct DnsTxtItem { |
91 | size_t length; | |
92 | LIST_FIELDS(DnsTxtItem, items); | |
93 | uint8_t data[]; | |
94 | }; | |
95 | ||
74b2466e LP |
96 | struct DnsResourceRecord { |
97 | unsigned n_ref; | |
faa133f3 | 98 | DnsResourceKey *key; |
7b50eb2e | 99 | char *to_string; |
74b2466e | 100 | uint32_t ttl; |
a8812dd7 LP |
101 | bool unparseable:1; |
102 | bool wire_format_canonical:1; | |
103 | void *wire_format; | |
104 | size_t wire_format_size; | |
105 | size_t wire_format_rdata_offset; | |
74b2466e LP |
106 | union { |
107 | struct { | |
108 | void *data; | |
f5430a3e | 109 | size_t size; |
d75acfb0 | 110 | } generic, opt; |
74b2466e | 111 | |
9c92ce6d LP |
112 | struct { |
113 | uint16_t priority; | |
114 | uint16_t weight; | |
115 | uint16_t port; | |
116 | char *name; | |
117 | } srv; | |
74b2466e LP |
118 | |
119 | struct { | |
120 | char *name; | |
8ac4e9e1 | 121 | } ptr, ns, cname, dname; |
74b2466e LP |
122 | |
123 | struct { | |
124 | char *cpu; | |
125 | char *os; | |
126 | } hinfo; | |
127 | ||
2e276efc | 128 | struct { |
2001c805 | 129 | DnsTxtItem *items; |
c0eb11cf | 130 | } txt, spf; |
74b2466e LP |
131 | |
132 | struct { | |
133 | struct in_addr in_addr; | |
134 | } a; | |
135 | ||
136 | struct { | |
137 | struct in6_addr in6_addr; | |
138 | } aaaa; | |
7e8e0422 LP |
139 | |
140 | struct { | |
141 | char *mname; | |
142 | char *rname; | |
143 | uint32_t serial; | |
144 | uint32_t refresh; | |
145 | uint32_t retry; | |
146 | uint32_t expire; | |
147 | uint32_t minimum; | |
148 | } soa; | |
946c7094 ZJS |
149 | |
150 | struct { | |
151 | uint16_t priority; | |
152 | char *exchange; | |
153 | } mx; | |
0dae31d4 ZJS |
154 | |
155 | struct { | |
156 | uint8_t version; | |
157 | uint8_t size; | |
158 | uint8_t horiz_pre; | |
159 | uint8_t vert_pre; | |
160 | uint32_t latitude; | |
161 | uint32_t longitude; | |
162 | uint32_t altitude; | |
163 | } loc; | |
42cc2eeb | 164 | |
abf126a3 TG |
165 | struct { |
166 | uint16_t key_tag; | |
167 | uint8_t algorithm; | |
168 | uint8_t digest_type; | |
169 | void *digest; | |
170 | size_t digest_size; | |
171 | } ds; | |
172 | ||
549c1a25 | 173 | /* https://tools.ietf.org/html/rfc4255#section-3.1 */ |
42cc2eeb LP |
174 | struct { |
175 | uint8_t algorithm; | |
176 | uint8_t fptype; | |
549c1a25 TG |
177 | void *fingerprint; |
178 | size_t fingerprint_size; | |
42cc2eeb | 179 | } sshfp; |
8db0d2f5 ZJS |
180 | |
181 | /* http://tools.ietf.org/html/rfc4034#section-2.1 */ | |
182 | struct { | |
f91dc240 LP |
183 | uint16_t flags; |
184 | uint8_t protocol; | |
8db0d2f5 ZJS |
185 | uint8_t algorithm; |
186 | void* key; | |
187 | size_t key_size; | |
188 | } dnskey; | |
151226ab ZJS |
189 | |
190 | /* http://tools.ietf.org/html/rfc4034#section-3.1 */ | |
191 | struct { | |
192 | uint16_t type_covered; | |
193 | uint8_t algorithm; | |
194 | uint8_t labels; | |
195 | uint32_t original_ttl; | |
196 | uint32_t expiration; | |
197 | uint32_t inception; | |
198 | uint16_t key_tag; | |
199 | char *signer; | |
200 | void *signature; | |
201 | size_t signature_size; | |
202 | } rrsig; | |
50f1e641 | 203 | |
9ead3519 | 204 | /* https://tools.ietf.org/html/rfc4034#section-4.1 */ |
50f1e641 TG |
205 | struct { |
206 | char *next_domain_name; | |
207 | Bitmap *types; | |
208 | } nsec; | |
5d45a880 TG |
209 | |
210 | struct { | |
211 | uint8_t algorithm; | |
212 | uint8_t flags; | |
213 | uint16_t iterations; | |
214 | void *salt; | |
215 | size_t salt_size; | |
216 | void *next_hashed_name; | |
217 | size_t next_hashed_name_size; | |
218 | Bitmap *types; | |
219 | } nsec3; | |
74b2466e LP |
220 | }; |
221 | }; | |
222 | ||
faa133f3 LP |
223 | static inline const char* DNS_RESOURCE_KEY_NAME(const DnsResourceKey *key) { |
224 | if (_unlikely_(!key)) | |
225 | return NULL; | |
226 | ||
227 | if (key->_name) | |
228 | return key->_name; | |
229 | ||
230 | return (char*) key + sizeof(DnsResourceKey); | |
231 | } | |
74b2466e | 232 | |
faa133f3 | 233 | DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name); |
36d9205d | 234 | DnsResourceKey* dns_resource_key_new_redirect(const DnsResourceKey *key, const DnsResourceRecord *cname); |
801ad6a6 | 235 | int dns_resource_key_new_append_suffix(DnsResourceKey **ret, DnsResourceKey *key, char *name); |
faa133f3 LP |
236 | DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name); |
237 | DnsResourceKey* dns_resource_key_ref(DnsResourceKey *key); | |
238 | DnsResourceKey* dns_resource_key_unref(DnsResourceKey *key); | |
28b9b764 | 239 | bool dns_resource_key_is_address(const DnsResourceKey *key); |
faa133f3 | 240 | int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b); |
105e1512 | 241 | int dns_resource_key_match_rr(const DnsResourceKey *key, DnsResourceRecord *rr, const char *search_domain); |
5d27351f | 242 | int dns_resource_key_match_cname_or_dname(const DnsResourceKey *key, const DnsResourceKey *cname, const char *search_domain); |
547973de | 243 | int dns_resource_key_match_soa(const DnsResourceKey *key, const DnsResourceKey *soa); |
2d4c5cbc | 244 | int dns_resource_key_to_string(const DnsResourceKey *key, char **ret); |
faa133f3 | 245 | DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceKey*, dns_resource_key_unref); |
322345fd | 246 | |
7778dfff DM |
247 | static inline bool dns_key_is_shared(const DnsResourceKey *key) { |
248 | return IN_SET(key->type, DNS_TYPE_PTR); | |
249 | } | |
250 | ||
faa133f3 | 251 | DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key); |
8bf52d3d | 252 | DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name); |
74b2466e LP |
253 | DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr); |
254 | DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr); | |
623a4c97 | 255 | int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name); |
78c6a153 | 256 | int dns_resource_record_new_address(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name); |
322345fd | 257 | int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b); |
7b50eb2e | 258 | const char* dns_resource_record_to_string(DnsResourceRecord *rr); |
faa133f3 | 259 | DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceRecord*, dns_resource_record_unref); |
322345fd | 260 | |
a8812dd7 LP |
261 | int dns_resource_record_to_wire_format(DnsResourceRecord *rr, bool canonical); |
262 | ||
2001c805 LP |
263 | DnsTxtItem *dns_txt_item_free_all(DnsTxtItem *i); |
264 | bool dns_txt_item_equal(DnsTxtItem *a, DnsTxtItem *b); | |
265 | ||
d5099efc | 266 | extern const struct hash_ops dns_resource_key_hash_ops; |
8730bccf LP |
267 | |
268 | const char* dnssec_algorithm_to_string(int i) _const_; | |
269 | int dnssec_algorithm_from_string(const char *s) _pure_; | |
270 | ||
271 | const char *dnssec_digest_to_string(int i) _const_; | |
272 | int dnssec_digest_from_string(const char *s) _pure_; |