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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
74b2466e LP |
2 | #pragma once |
3 | ||
4 | /*** | |
5 | This file is part of systemd. | |
6 | ||
7 | Copyright 2014 Lennart Poettering | |
74b2466e LP |
8 | ***/ |
9 | ||
3c0cf502 LP |
10 | #include "in-addr-util.h" |
11 | ||
74b2466e | 12 | typedef struct DnsServer DnsServer; |
74b2466e | 13 | |
4e945a6f LP |
14 | typedef enum DnsServerType { |
15 | DNS_SERVER_SYSTEM, | |
16 | DNS_SERVER_FALLBACK, | |
17 | DNS_SERVER_LINK, | |
18 | } DnsServerType; | |
e3309036 ZJS |
19 | #define _DNS_SERVER_TYPE_MAX (DNS_SERVER_LINK + 1) |
20 | ||
21 | const char* dns_server_type_to_string(DnsServerType i) _const_; | |
22 | DnsServerType dns_server_type_from_string(const char *s) _pure_; | |
4e945a6f | 23 | |
be808ea0 TG |
24 | typedef enum DnsServerFeatureLevel { |
25 | DNS_SERVER_FEATURE_LEVEL_TCP, | |
26 | DNS_SERVER_FEATURE_LEVEL_UDP, | |
9c5e12a4 | 27 | DNS_SERVER_FEATURE_LEVEL_EDNS0, |
7586f4d1 | 28 | DNS_SERVER_FEATURE_LEVEL_DO, |
d74fb368 | 29 | DNS_SERVER_FEATURE_LEVEL_LARGE, |
be808ea0 TG |
30 | _DNS_SERVER_FEATURE_LEVEL_MAX, |
31 | _DNS_SERVER_FEATURE_LEVEL_INVALID = -1 | |
32 | } DnsServerFeatureLevel; | |
33 | ||
34 | #define DNS_SERVER_FEATURE_LEVEL_WORST 0 | |
35 | #define DNS_SERVER_FEATURE_LEVEL_BEST (_DNS_SERVER_FEATURE_LEVEL_MAX - 1) | |
36 | ||
37 | const char* dns_server_feature_level_to_string(int i) _const_; | |
38 | int dns_server_feature_level_from_string(const char *s) _pure_; | |
39 | ||
3e684349 | 40 | #include "resolved-link.h" |
be808ea0 | 41 | #include "resolved-manager.h" |
3e684349 | 42 | |
74b2466e LP |
43 | struct DnsServer { |
44 | Manager *manager; | |
74b2466e | 45 | |
91b14d6f TG |
46 | unsigned n_ref; |
47 | ||
4e945a6f | 48 | DnsServerType type; |
3c0cf502 LP |
49 | Link *link; |
50 | ||
0dd25fb9 | 51 | int family; |
74b2466e | 52 | union in_addr_union address; |
2817157b | 53 | int ifindex; /* for IPv6 link-local DNS servers */ |
74b2466e | 54 | |
6cb08a89 | 55 | char *server_string; |
98767d75 | 56 | DnsStream *stream; |
6cb08a89 | 57 | |
9df3ba6c TG |
58 | usec_t resend_timeout; |
59 | usec_t max_rtt; | |
60 | ||
f4461e56 LP |
61 | DnsServerFeatureLevel verified_feature_level; |
62 | DnsServerFeatureLevel possible_feature_level; | |
de54e62b | 63 | |
d74fb368 | 64 | size_t received_udp_packet_max; |
de54e62b | 65 | |
6bb2c085 LP |
66 | unsigned n_failed_udp; |
67 | unsigned n_failed_tcp; | |
de54e62b | 68 | |
6bb2c085 | 69 | bool packet_truncated:1; |
de54e62b LP |
70 | bool packet_bad_opt:1; |
71 | bool packet_rrsig_missing:1; | |
72 | ||
be808ea0 TG |
73 | usec_t verified_usec; |
74 | usec_t features_grace_period_usec; | |
74b2466e | 75 | |
1e02e182 LP |
76 | /* Whether we already warned about downgrading to non-DNSSEC mode for this server */ |
77 | bool warned_downgrade:1; | |
78 | ||
b652d4a2 LP |
79 | /* Used when GC'ing old DNS servers when configuration changes. */ |
80 | bool marked:1; | |
81 | ||
0eac4623 LP |
82 | /* If linked is set, then this server appears in the servers linked list */ |
83 | bool linked:1; | |
74b2466e LP |
84 | LIST_FIELDS(DnsServer, servers); |
85 | }; | |
86 | ||
87 | int dns_server_new( | |
88 | Manager *m, | |
0b58db65 | 89 | DnsServer **ret, |
4e945a6f | 90 | DnsServerType type, |
0b58db65 | 91 | Link *link, |
0dd25fb9 | 92 | int family, |
2817157b LP |
93 | const union in_addr_union *address, |
94 | int ifindex); | |
74b2466e | 95 | |
91b14d6f TG |
96 | DnsServer* dns_server_ref(DnsServer *s); |
97 | DnsServer* dns_server_unref(DnsServer *s); | |
87f5a193 | 98 | |
0eac4623 | 99 | void dns_server_unlink(DnsServer *s); |
0b58db65 | 100 | void dns_server_move_back_and_unmark(DnsServer *s); |
0eac4623 | 101 | |
6bb2c085 LP |
102 | void dns_server_packet_received(DnsServer *s, int protocol, DnsServerFeatureLevel level, usec_t rtt, size_t size); |
103 | void dns_server_packet_lost(DnsServer *s, int protocol, DnsServerFeatureLevel level, usec_t usec); | |
6bb2c085 | 104 | void dns_server_packet_truncated(DnsServer *s, DnsServerFeatureLevel level); |
de54e62b LP |
105 | void dns_server_packet_rrsig_missing(DnsServer *s, DnsServerFeatureLevel level); |
106 | void dns_server_packet_bad_opt(DnsServer *s, DnsServerFeatureLevel level); | |
d001e0a3 | 107 | void dns_server_packet_rcode_downgrade(DnsServer *s, DnsServerFeatureLevel level); |
9df3ba6c | 108 | |
f4461e56 LP |
109 | DnsServerFeatureLevel dns_server_possible_feature_level(DnsServer *s); |
110 | ||
519ef046 LP |
111 | int dns_server_adjust_opt(DnsServer *server, DnsPacket *packet, DnsServerFeatureLevel level); |
112 | ||
6cb08a89 | 113 | const char *dns_server_string(DnsServer *server); |
2817157b | 114 | int dns_server_ifindex(const DnsServer *s); |
6cb08a89 | 115 | |
92ec902a LP |
116 | bool dns_server_dnssec_supported(DnsServer *server); |
117 | ||
1e02e182 LP |
118 | void dns_server_warn_downgrade(DnsServer *server); |
119 | ||
b9fe94ca MP |
120 | bool dns_server_limited_domains(DnsServer *server); |
121 | ||
2817157b | 122 | DnsServer *dns_server_find(DnsServer *first, int family, const union in_addr_union *in_addr, int ifindex); |
4b95f179 LP |
123 | |
124 | void dns_server_unlink_all(DnsServer *first); | |
125 | void dns_server_unlink_marked(DnsServer *first); | |
126 | void dns_server_mark_all(DnsServer *first); | |
f2f1dbe5 | 127 | |
4b95f179 | 128 | DnsServer *manager_get_first_dns_server(Manager *m, DnsServerType t); |
636e813d | 129 | |
0eac4623 | 130 | DnsServer *manager_set_dns_server(Manager *m, DnsServer *s); |
0eac4623 LP |
131 | DnsServer *manager_get_dns_server(Manager *m); |
132 | void manager_next_dns_server(Manager *m); | |
133 | ||
b30bf55d LP |
134 | bool dns_server_address_valid(int family, const union in_addr_union *sa); |
135 | ||
12bf2331 LP |
136 | DnssecMode dns_server_get_dnssec_mode(DnsServer *s); |
137 | ||
8300ba21 TG |
138 | DEFINE_TRIVIAL_CLEANUP_FUNC(DnsServer*, dns_server_unref); |
139 | ||
d5099efc | 140 | extern const struct hash_ops dns_server_hash_ops; |
ce7c8b20 LP |
141 | |
142 | void dns_server_flush_cache(DnsServer *s); | |
59c0fd0e LP |
143 | |
144 | void dns_server_reset_features(DnsServer *s); | |
145 | void dns_server_reset_features_all(DnsServer *s); | |
cf84484a LP |
146 | |
147 | void dns_server_dump(DnsServer *s, FILE *f); |