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5eef597e MP |
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 | ||
5eef597e MP |
24 | #include <netinet/in.h> |
25 | ||
7035cd9e | 26 | #include "bitmap.h" |
5eef597e MP |
27 | #include "hashmap.h" |
28 | #include "in-addr-util.h" | |
29 | #include "dns-type.h" | |
30 | ||
31 | typedef struct DnsResourceKey DnsResourceKey; | |
32 | typedef struct DnsResourceRecord DnsResourceRecord; | |
33 | ||
34 | /* DNS record classes, see RFC 1035 */ | |
35 | enum { | |
36 | DNS_CLASS_IN = 0x01, | |
37 | DNS_CLASS_ANY = 0xFF, | |
38 | _DNS_CLASS_MAX, | |
39 | _DNS_CLASS_INVALID = -1 | |
40 | }; | |
41 | ||
42 | struct DnsResourceKey { | |
43 | unsigned n_ref; | |
44 | uint16_t class, type; | |
45 | char *_name; /* don't access directy, use DNS_RESOURCE_KEY_NAME()! */ | |
46 | }; | |
47 | ||
48 | struct DnsResourceRecord { | |
49 | unsigned n_ref; | |
50 | DnsResourceKey *key; | |
51 | uint32_t ttl; | |
52 | bool unparseable; | |
53 | union { | |
54 | struct { | |
55 | void *data; | |
7035cd9e | 56 | size_t size; |
5eef597e MP |
57 | } generic; |
58 | ||
59 | struct { | |
60 | uint16_t priority; | |
61 | uint16_t weight; | |
62 | uint16_t port; | |
63 | char *name; | |
64 | } srv; | |
65 | ||
66 | struct { | |
67 | char *name; | |
68 | } ptr, ns, cname, dname; | |
69 | ||
70 | struct { | |
71 | char *cpu; | |
72 | char *os; | |
73 | } hinfo; | |
74 | ||
75 | struct { | |
76 | char **strings; | |
77 | } txt, spf; | |
78 | ||
79 | struct { | |
80 | struct in_addr in_addr; | |
81 | } a; | |
82 | ||
83 | struct { | |
84 | struct in6_addr in6_addr; | |
85 | } aaaa; | |
86 | ||
87 | struct { | |
88 | char *mname; | |
89 | char *rname; | |
90 | uint32_t serial; | |
91 | uint32_t refresh; | |
92 | uint32_t retry; | |
93 | uint32_t expire; | |
94 | uint32_t minimum; | |
95 | } soa; | |
96 | ||
97 | struct { | |
98 | uint16_t priority; | |
99 | char *exchange; | |
100 | } mx; | |
101 | ||
102 | struct { | |
103 | uint8_t version; | |
104 | uint8_t size; | |
105 | uint8_t horiz_pre; | |
106 | uint8_t vert_pre; | |
107 | uint32_t latitude; | |
108 | uint32_t longitude; | |
109 | uint32_t altitude; | |
110 | } loc; | |
111 | ||
7035cd9e MP |
112 | struct { |
113 | uint16_t key_tag; | |
114 | uint8_t algorithm; | |
115 | uint8_t digest_type; | |
116 | void *digest; | |
117 | size_t digest_size; | |
118 | } ds; | |
119 | ||
120 | /* https://tools.ietf.org/html/rfc4255#section-3.1 */ | |
5eef597e MP |
121 | struct { |
122 | uint8_t algorithm; | |
123 | uint8_t fptype; | |
7035cd9e MP |
124 | void *fingerprint; |
125 | size_t fingerprint_size; | |
5eef597e MP |
126 | } sshfp; |
127 | ||
128 | /* http://tools.ietf.org/html/rfc4034#section-2.1 */ | |
129 | struct { | |
130 | bool zone_key_flag:1; | |
131 | bool sep_flag:1; | |
132 | uint8_t algorithm; | |
133 | void* key; | |
134 | size_t key_size; | |
135 | } dnskey; | |
136 | ||
137 | /* http://tools.ietf.org/html/rfc4034#section-3.1 */ | |
138 | struct { | |
139 | uint16_t type_covered; | |
140 | uint8_t algorithm; | |
141 | uint8_t labels; | |
142 | uint32_t original_ttl; | |
143 | uint32_t expiration; | |
144 | uint32_t inception; | |
145 | uint16_t key_tag; | |
146 | char *signer; | |
147 | void *signature; | |
148 | size_t signature_size; | |
149 | } rrsig; | |
7035cd9e MP |
150 | |
151 | struct { | |
152 | char *next_domain_name; | |
153 | Bitmap *types; | |
154 | } nsec; | |
155 | ||
156 | struct { | |
157 | uint8_t algorithm; | |
158 | uint8_t flags; | |
159 | uint16_t iterations; | |
160 | void *salt; | |
161 | size_t salt_size; | |
162 | void *next_hashed_name; | |
163 | size_t next_hashed_name_size; | |
164 | Bitmap *types; | |
165 | } nsec3; | |
5eef597e MP |
166 | }; |
167 | }; | |
168 | ||
169 | static inline const char* DNS_RESOURCE_KEY_NAME(const DnsResourceKey *key) { | |
170 | if (_unlikely_(!key)) | |
171 | return NULL; | |
172 | ||
173 | if (key->_name) | |
174 | return key->_name; | |
175 | ||
176 | return (char*) key + sizeof(DnsResourceKey); | |
177 | } | |
178 | ||
179 | DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name); | |
6300502b MP |
180 | DnsResourceKey* dns_resource_key_new_cname(const DnsResourceKey *key); |
181 | DnsResourceKey* dns_resource_key_new_redirect(const DnsResourceKey *key, const DnsResourceRecord *cname); | |
5eef597e MP |
182 | DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name); |
183 | DnsResourceKey* dns_resource_key_ref(DnsResourceKey *key); | |
184 | DnsResourceKey* dns_resource_key_unref(DnsResourceKey *key); | |
185 | int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b); | |
186 | int dns_resource_key_match_rr(const DnsResourceKey *key, const DnsResourceRecord *rr); | |
187 | int dns_resource_key_match_cname(const DnsResourceKey *key, const DnsResourceRecord *rr); | |
188 | int dns_resource_key_to_string(const DnsResourceKey *key, char **ret); | |
189 | DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceKey*, dns_resource_key_unref); | |
190 | ||
191 | DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key); | |
192 | DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name); | |
193 | DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr); | |
194 | DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr); | |
195 | int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name); | |
13d276d0 | 196 | int dns_resource_record_new_address(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name); |
5eef597e MP |
197 | int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b); |
198 | int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret); | |
199 | DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceRecord*, dns_resource_record_unref); | |
200 | ||
201 | const char *dns_class_to_string(uint16_t type); | |
202 | int dns_class_from_string(const char *name, uint16_t *class); | |
203 | ||
204 | extern const struct hash_ops dns_resource_key_hash_ops; |