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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 | ||
24 | #include <inttypes.h> | |
25 | #include <netinet/in.h> | |
26 | ||
27 | #include "util.h" | |
322345fd | 28 | #include "hashmap.h" |
623a4c97 | 29 | #include "in-addr-util.h" |
7263f724 | 30 | #include "dns-type.h" |
74b2466e LP |
31 | |
32 | typedef struct DnsResourceKey DnsResourceKey; | |
33 | typedef struct DnsResourceRecord DnsResourceRecord; | |
34 | ||
35 | /* DNS record classes, see RFC 1035 */ | |
36 | enum { | |
37 | DNS_CLASS_IN = 0x01, | |
322345fd | 38 | DNS_CLASS_ANY = 0xFF, |
b93312f5 ZJS |
39 | _DNS_CLASS_MAX, |
40 | _DNS_CLASS_INVALID = -1 | |
74b2466e LP |
41 | }; |
42 | ||
74b2466e | 43 | struct DnsResourceKey { |
faa133f3 LP |
44 | unsigned n_ref; |
45 | uint16_t class, type; | |
46 | char *_name; /* don't access directy, use DNS_RESOURCE_KEY_NAME()! */ | |
74b2466e LP |
47 | }; |
48 | ||
49 | struct DnsResourceRecord { | |
50 | unsigned n_ref; | |
faa133f3 | 51 | DnsResourceKey *key; |
74b2466e | 52 | uint32_t ttl; |
0dae31d4 | 53 | bool unparseable; |
74b2466e LP |
54 | union { |
55 | struct { | |
56 | void *data; | |
57 | uint16_t size; | |
58 | } generic; | |
59 | ||
9c92ce6d LP |
60 | struct { |
61 | uint16_t priority; | |
62 | uint16_t weight; | |
63 | uint16_t port; | |
64 | char *name; | |
65 | } srv; | |
74b2466e LP |
66 | |
67 | struct { | |
68 | char *name; | |
8ac4e9e1 | 69 | } ptr, ns, cname, dname; |
74b2466e LP |
70 | |
71 | struct { | |
72 | char *cpu; | |
73 | char *os; | |
74 | } hinfo; | |
75 | ||
2e276efc ZJS |
76 | struct { |
77 | char **strings; | |
c0eb11cf | 78 | } txt, spf; |
74b2466e LP |
79 | |
80 | struct { | |
81 | struct in_addr in_addr; | |
82 | } a; | |
83 | ||
84 | struct { | |
85 | struct in6_addr in6_addr; | |
86 | } aaaa; | |
7e8e0422 LP |
87 | |
88 | struct { | |
89 | char *mname; | |
90 | char *rname; | |
91 | uint32_t serial; | |
92 | uint32_t refresh; | |
93 | uint32_t retry; | |
94 | uint32_t expire; | |
95 | uint32_t minimum; | |
96 | } soa; | |
946c7094 ZJS |
97 | |
98 | struct { | |
99 | uint16_t priority; | |
100 | char *exchange; | |
101 | } mx; | |
0dae31d4 ZJS |
102 | |
103 | struct { | |
104 | uint8_t version; | |
105 | uint8_t size; | |
106 | uint8_t horiz_pre; | |
107 | uint8_t vert_pre; | |
108 | uint32_t latitude; | |
109 | uint32_t longitude; | |
110 | uint32_t altitude; | |
111 | } loc; | |
42cc2eeb LP |
112 | |
113 | struct { | |
114 | uint8_t algorithm; | |
115 | uint8_t fptype; | |
116 | void *key; | |
117 | size_t key_size; | |
118 | } sshfp; | |
74b2466e LP |
119 | }; |
120 | }; | |
121 | ||
faa133f3 LP |
122 | static inline const char* DNS_RESOURCE_KEY_NAME(const DnsResourceKey *key) { |
123 | if (_unlikely_(!key)) | |
124 | return NULL; | |
125 | ||
126 | if (key->_name) | |
127 | return key->_name; | |
128 | ||
129 | return (char*) key + sizeof(DnsResourceKey); | |
130 | } | |
74b2466e | 131 | |
faa133f3 LP |
132 | DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name); |
133 | DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name); | |
134 | DnsResourceKey* dns_resource_key_ref(DnsResourceKey *key); | |
135 | DnsResourceKey* dns_resource_key_unref(DnsResourceKey *key); | |
136 | int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b); | |
137 | int dns_resource_key_match_rr(const DnsResourceKey *key, const DnsResourceRecord *rr); | |
138 | int dns_resource_key_match_cname(const DnsResourceKey *key, const DnsResourceRecord *rr); | |
322345fd LP |
139 | unsigned long dns_resource_key_hash_func(const void *i, const uint8_t hash_key[HASH_KEY_SIZE]); |
140 | int dns_resource_key_compare_func(const void *a, const void *b); | |
2d4c5cbc | 141 | int dns_resource_key_to_string(const DnsResourceKey *key, char **ret); |
faa133f3 | 142 | DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceKey*, dns_resource_key_unref); |
322345fd | 143 | |
faa133f3 | 144 | DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key); |
8bf52d3d | 145 | DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name); |
74b2466e LP |
146 | DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr); |
147 | DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr); | |
623a4c97 | 148 | int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name); |
322345fd | 149 | int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b); |
2d4c5cbc | 150 | int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret); |
faa133f3 | 151 | DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceRecord*, dns_resource_record_unref); |
322345fd | 152 | |
322345fd | 153 | const char *dns_class_to_string(uint16_t type); |
2d4c5cbc | 154 | int dns_class_from_string(const char *name, uint16_t *class); |