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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
74b2466e LP |
2 | #pragma once |
3 | ||
3c0cf502 LP |
4 | #include "in-addr-util.h" |
5 | ||
74b2466e | 6 | typedef struct DnsServer DnsServer; |
74b2466e | 7 | |
4e945a6f LP |
8 | typedef enum DnsServerType { |
9 | DNS_SERVER_SYSTEM, | |
10 | DNS_SERVER_FALLBACK, | |
11 | DNS_SERVER_LINK, | |
3fe30d85 YW |
12 | _DNS_SERVER_TYPE_MAX, |
13 | _DNS_SERVER_TYPE_INVALID = -1 | |
4e945a6f | 14 | } DnsServerType; |
e3309036 ZJS |
15 | |
16 | const char* dns_server_type_to_string(DnsServerType i) _const_; | |
17 | DnsServerType dns_server_type_from_string(const char *s) _pure_; | |
4e945a6f | 18 | |
be808ea0 TG |
19 | typedef enum DnsServerFeatureLevel { |
20 | DNS_SERVER_FEATURE_LEVEL_TCP, | |
21 | DNS_SERVER_FEATURE_LEVEL_UDP, | |
9c5e12a4 | 22 | DNS_SERVER_FEATURE_LEVEL_EDNS0, |
5d67a7ae | 23 | DNS_SERVER_FEATURE_LEVEL_TLS_PLAIN, |
7586f4d1 | 24 | DNS_SERVER_FEATURE_LEVEL_DO, |
d74fb368 | 25 | DNS_SERVER_FEATURE_LEVEL_LARGE, |
5d67a7ae | 26 | DNS_SERVER_FEATURE_LEVEL_TLS_DO, |
be808ea0 TG |
27 | _DNS_SERVER_FEATURE_LEVEL_MAX, |
28 | _DNS_SERVER_FEATURE_LEVEL_INVALID = -1 | |
29 | } DnsServerFeatureLevel; | |
30 | ||
31 | #define DNS_SERVER_FEATURE_LEVEL_WORST 0 | |
32 | #define DNS_SERVER_FEATURE_LEVEL_BEST (_DNS_SERVER_FEATURE_LEVEL_MAX - 1) | |
5d67a7ae | 33 | #define DNS_SERVER_FEATURE_LEVEL_IS_TLS(x) IN_SET(x, DNS_SERVER_FEATURE_LEVEL_TLS_PLAIN, DNS_SERVER_FEATURE_LEVEL_TLS_DO) |
be808ea0 TG |
34 | |
35 | const char* dns_server_feature_level_to_string(int i) _const_; | |
36 | int dns_server_feature_level_from_string(const char *s) _pure_; | |
37 | ||
3e684349 | 38 | #include "resolved-link.h" |
be808ea0 | 39 | #include "resolved-manager.h" |
6016fcb0 IT |
40 | #if ENABLE_DNS_OVER_TLS |
41 | #include "resolved-dnstls.h" | |
42 | #endif | |
3e684349 | 43 | |
74b2466e LP |
44 | struct DnsServer { |
45 | Manager *manager; | |
74b2466e | 46 | |
91b14d6f TG |
47 | unsigned n_ref; |
48 | ||
4e945a6f | 49 | DnsServerType type; |
3c0cf502 LP |
50 | Link *link; |
51 | ||
0dd25fb9 | 52 | int family; |
74b2466e | 53 | union in_addr_union address; |
2817157b | 54 | int ifindex; /* for IPv6 link-local DNS servers */ |
74b2466e | 55 | |
6cb08a89 | 56 | char *server_string; |
98767d75 | 57 | DnsStream *stream; |
6cb08a89 | 58 | |
56ddbf10 | 59 | #if ENABLE_DNS_OVER_TLS |
6016fcb0 | 60 | DnsTlsServerData dnstls_data; |
5d67a7ae IT |
61 | #endif |
62 | ||
f4461e56 LP |
63 | DnsServerFeatureLevel verified_feature_level; |
64 | DnsServerFeatureLevel possible_feature_level; | |
de54e62b | 65 | |
d74fb368 | 66 | size_t received_udp_packet_max; |
de54e62b | 67 | |
6bb2c085 LP |
68 | unsigned n_failed_udp; |
69 | unsigned n_failed_tcp; | |
5d67a7ae | 70 | unsigned n_failed_tls; |
de54e62b | 71 | |
6bb2c085 | 72 | bool packet_truncated:1; |
de54e62b LP |
73 | bool packet_bad_opt:1; |
74 | bool packet_rrsig_missing:1; | |
75 | ||
be808ea0 TG |
76 | usec_t verified_usec; |
77 | usec_t features_grace_period_usec; | |
74b2466e | 78 | |
1e02e182 LP |
79 | /* Whether we already warned about downgrading to non-DNSSEC mode for this server */ |
80 | bool warned_downgrade:1; | |
81 | ||
b652d4a2 LP |
82 | /* Used when GC'ing old DNS servers when configuration changes. */ |
83 | bool marked:1; | |
84 | ||
0eac4623 LP |
85 | /* If linked is set, then this server appears in the servers linked list */ |
86 | bool linked:1; | |
74b2466e LP |
87 | LIST_FIELDS(DnsServer, servers); |
88 | }; | |
89 | ||
90 | int dns_server_new( | |
91 | Manager *m, | |
0b58db65 | 92 | DnsServer **ret, |
4e945a6f | 93 | DnsServerType type, |
0b58db65 | 94 | Link *link, |
0dd25fb9 | 95 | int family, |
2817157b LP |
96 | const union in_addr_union *address, |
97 | int ifindex); | |
74b2466e | 98 | |
91b14d6f TG |
99 | DnsServer* dns_server_ref(DnsServer *s); |
100 | DnsServer* dns_server_unref(DnsServer *s); | |
87f5a193 | 101 | |
0eac4623 | 102 | void dns_server_unlink(DnsServer *s); |
0b58db65 | 103 | void dns_server_move_back_and_unmark(DnsServer *s); |
0eac4623 | 104 | |
dbc4661a | 105 | void dns_server_packet_received(DnsServer *s, int protocol, DnsServerFeatureLevel level, size_t size); |
3da3cdd5 | 106 | void dns_server_packet_lost(DnsServer *s, int protocol, DnsServerFeatureLevel level); |
6bb2c085 | 107 | void dns_server_packet_truncated(DnsServer *s, DnsServerFeatureLevel level); |
de54e62b LP |
108 | void dns_server_packet_rrsig_missing(DnsServer *s, DnsServerFeatureLevel level); |
109 | void dns_server_packet_bad_opt(DnsServer *s, DnsServerFeatureLevel level); | |
d001e0a3 | 110 | void dns_server_packet_rcode_downgrade(DnsServer *s, DnsServerFeatureLevel level); |
9df3ba6c | 111 | |
f4461e56 LP |
112 | DnsServerFeatureLevel dns_server_possible_feature_level(DnsServer *s); |
113 | ||
519ef046 LP |
114 | int dns_server_adjust_opt(DnsServer *server, DnsPacket *packet, DnsServerFeatureLevel level); |
115 | ||
6cb08a89 | 116 | const char *dns_server_string(DnsServer *server); |
2817157b | 117 | int dns_server_ifindex(const DnsServer *s); |
6cb08a89 | 118 | |
92ec902a LP |
119 | bool dns_server_dnssec_supported(DnsServer *server); |
120 | ||
1e02e182 LP |
121 | void dns_server_warn_downgrade(DnsServer *server); |
122 | ||
b9fe94ca MP |
123 | bool dns_server_limited_domains(DnsServer *server); |
124 | ||
2817157b | 125 | DnsServer *dns_server_find(DnsServer *first, int family, const union in_addr_union *in_addr, int ifindex); |
4b95f179 LP |
126 | |
127 | void dns_server_unlink_all(DnsServer *first); | |
128 | void dns_server_unlink_marked(DnsServer *first); | |
129 | void dns_server_mark_all(DnsServer *first); | |
f2f1dbe5 | 130 | |
4b95f179 | 131 | DnsServer *manager_get_first_dns_server(Manager *m, DnsServerType t); |
636e813d | 132 | |
0eac4623 | 133 | DnsServer *manager_set_dns_server(Manager *m, DnsServer *s); |
0eac4623 LP |
134 | DnsServer *manager_get_dns_server(Manager *m); |
135 | void manager_next_dns_server(Manager *m); | |
136 | ||
b30bf55d LP |
137 | bool dns_server_address_valid(int family, const union in_addr_union *sa); |
138 | ||
12bf2331 | 139 | DnssecMode dns_server_get_dnssec_mode(DnsServer *s); |
c9299be2 | 140 | DnsOverTlsMode dns_server_get_dns_over_tls_mode(DnsServer *s); |
12bf2331 | 141 | |
8300ba21 TG |
142 | DEFINE_TRIVIAL_CLEANUP_FUNC(DnsServer*, dns_server_unref); |
143 | ||
d5099efc | 144 | extern const struct hash_ops dns_server_hash_ops; |
ce7c8b20 LP |
145 | |
146 | void dns_server_flush_cache(DnsServer *s); | |
59c0fd0e LP |
147 | |
148 | void dns_server_reset_features(DnsServer *s); | |
149 | void dns_server_reset_features_all(DnsServer *s); | |
cf84484a LP |
150 | |
151 | void dns_server_dump(DnsServer *s, FILE *f); |