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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 | 4 | #include "in-addr-util.h" |
be28f72d DDM |
5 | #include "list.h" |
6 | #include "resolve-util.h" | |
7 | #include "time-util.h" | |
3c0cf502 | 8 | |
be28f72d | 9 | typedef struct DnsScope DnsScope; |
74b2466e | 10 | typedef struct DnsServer DnsServer; |
be28f72d DDM |
11 | typedef struct DnsStream DnsStream; |
12 | typedef struct DnsPacket DnsPacket; | |
13 | typedef struct Link Link; | |
14 | typedef struct Manager Manager; | |
15 | ||
16 | #include "resolved-dnstls.h" | |
74b2466e | 17 | |
4e945a6f LP |
18 | typedef enum DnsServerType { |
19 | DNS_SERVER_SYSTEM, | |
20 | DNS_SERVER_FALLBACK, | |
21 | DNS_SERVER_LINK, | |
3fe30d85 YW |
22 | _DNS_SERVER_TYPE_MAX, |
23 | _DNS_SERVER_TYPE_INVALID = -1 | |
4e945a6f | 24 | } DnsServerType; |
e3309036 ZJS |
25 | |
26 | const char* dns_server_type_to_string(DnsServerType i) _const_; | |
27 | DnsServerType dns_server_type_from_string(const char *s) _pure_; | |
4e945a6f | 28 | |
be808ea0 TG |
29 | typedef enum DnsServerFeatureLevel { |
30 | DNS_SERVER_FEATURE_LEVEL_TCP, | |
31 | DNS_SERVER_FEATURE_LEVEL_UDP, | |
9c5e12a4 | 32 | DNS_SERVER_FEATURE_LEVEL_EDNS0, |
5d67a7ae | 33 | DNS_SERVER_FEATURE_LEVEL_TLS_PLAIN, |
7586f4d1 | 34 | DNS_SERVER_FEATURE_LEVEL_DO, |
d74fb368 | 35 | DNS_SERVER_FEATURE_LEVEL_LARGE, |
5d67a7ae | 36 | DNS_SERVER_FEATURE_LEVEL_TLS_DO, |
be808ea0 TG |
37 | _DNS_SERVER_FEATURE_LEVEL_MAX, |
38 | _DNS_SERVER_FEATURE_LEVEL_INVALID = -1 | |
39 | } DnsServerFeatureLevel; | |
40 | ||
41 | #define DNS_SERVER_FEATURE_LEVEL_WORST 0 | |
42 | #define DNS_SERVER_FEATURE_LEVEL_BEST (_DNS_SERVER_FEATURE_LEVEL_MAX - 1) | |
5d67a7ae | 43 | #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 |
44 | |
45 | const char* dns_server_feature_level_to_string(int i) _const_; | |
46 | int dns_server_feature_level_from_string(const char *s) _pure_; | |
47 | ||
74b2466e LP |
48 | struct DnsServer { |
49 | Manager *manager; | |
74b2466e | 50 | |
91b14d6f TG |
51 | unsigned n_ref; |
52 | ||
4e945a6f | 53 | DnsServerType type; |
3c0cf502 LP |
54 | Link *link; |
55 | ||
0dd25fb9 | 56 | int family; |
74b2466e | 57 | union in_addr_union address; |
2817157b | 58 | int ifindex; /* for IPv6 link-local DNS servers */ |
74b2466e | 59 | |
6cb08a89 | 60 | char *server_string; |
51bc63fe | 61 | |
2e22a54f GL |
62 | char *server_name; |
63 | ||
51bc63fe | 64 | /* The long-lived stream towards this server. */ |
98767d75 | 65 | DnsStream *stream; |
6cb08a89 | 66 | |
56ddbf10 | 67 | #if ENABLE_DNS_OVER_TLS |
6016fcb0 | 68 | DnsTlsServerData dnstls_data; |
5d67a7ae IT |
69 | #endif |
70 | ||
f4461e56 LP |
71 | DnsServerFeatureLevel verified_feature_level; |
72 | DnsServerFeatureLevel possible_feature_level; | |
de54e62b | 73 | |
d74fb368 | 74 | size_t received_udp_packet_max; |
de54e62b | 75 | |
6bb2c085 LP |
76 | unsigned n_failed_udp; |
77 | unsigned n_failed_tcp; | |
5d67a7ae | 78 | unsigned n_failed_tls; |
de54e62b | 79 | |
6bb2c085 | 80 | bool packet_truncated:1; |
de54e62b LP |
81 | bool packet_bad_opt:1; |
82 | bool packet_rrsig_missing:1; | |
83 | ||
be808ea0 TG |
84 | usec_t verified_usec; |
85 | usec_t features_grace_period_usec; | |
74b2466e | 86 | |
1e02e182 LP |
87 | /* Whether we already warned about downgrading to non-DNSSEC mode for this server */ |
88 | bool warned_downgrade:1; | |
89 | ||
b652d4a2 LP |
90 | /* Used when GC'ing old DNS servers when configuration changes. */ |
91 | bool marked:1; | |
92 | ||
0eac4623 LP |
93 | /* If linked is set, then this server appears in the servers linked list */ |
94 | bool linked:1; | |
74b2466e LP |
95 | LIST_FIELDS(DnsServer, servers); |
96 | }; | |
97 | ||
98 | int dns_server_new( | |
99 | Manager *m, | |
0b58db65 | 100 | DnsServer **ret, |
4e945a6f | 101 | DnsServerType type, |
0b58db65 | 102 | Link *link, |
0dd25fb9 | 103 | int family, |
2817157b | 104 | const union in_addr_union *address, |
2e22a54f GL |
105 | int ifindex, |
106 | const char *server_string); | |
74b2466e | 107 | |
91b14d6f TG |
108 | DnsServer* dns_server_ref(DnsServer *s); |
109 | DnsServer* dns_server_unref(DnsServer *s); | |
87f5a193 | 110 | |
0eac4623 | 111 | void dns_server_unlink(DnsServer *s); |
0b58db65 | 112 | void dns_server_move_back_and_unmark(DnsServer *s); |
0eac4623 | 113 | |
dbc4661a | 114 | void dns_server_packet_received(DnsServer *s, int protocol, DnsServerFeatureLevel level, size_t size); |
3da3cdd5 | 115 | void dns_server_packet_lost(DnsServer *s, int protocol, DnsServerFeatureLevel level); |
6bb2c085 | 116 | void dns_server_packet_truncated(DnsServer *s, DnsServerFeatureLevel level); |
de54e62b LP |
117 | void dns_server_packet_rrsig_missing(DnsServer *s, DnsServerFeatureLevel level); |
118 | void dns_server_packet_bad_opt(DnsServer *s, DnsServerFeatureLevel level); | |
d001e0a3 | 119 | void dns_server_packet_rcode_downgrade(DnsServer *s, DnsServerFeatureLevel level); |
9df3ba6c | 120 | |
f4461e56 LP |
121 | DnsServerFeatureLevel dns_server_possible_feature_level(DnsServer *s); |
122 | ||
519ef046 LP |
123 | int dns_server_adjust_opt(DnsServer *server, DnsPacket *packet, DnsServerFeatureLevel level); |
124 | ||
6cb08a89 | 125 | const char *dns_server_string(DnsServer *server); |
2817157b | 126 | int dns_server_ifindex(const DnsServer *s); |
6cb08a89 | 127 | |
92ec902a LP |
128 | bool dns_server_dnssec_supported(DnsServer *server); |
129 | ||
1e02e182 LP |
130 | void dns_server_warn_downgrade(DnsServer *server); |
131 | ||
2817157b | 132 | DnsServer *dns_server_find(DnsServer *first, int family, const union in_addr_union *in_addr, int ifindex); |
4b95f179 LP |
133 | |
134 | void dns_server_unlink_all(DnsServer *first); | |
135 | void dns_server_unlink_marked(DnsServer *first); | |
136 | void dns_server_mark_all(DnsServer *first); | |
f2f1dbe5 | 137 | |
4b95f179 | 138 | DnsServer *manager_get_first_dns_server(Manager *m, DnsServerType t); |
636e813d | 139 | |
0eac4623 | 140 | DnsServer *manager_set_dns_server(Manager *m, DnsServer *s); |
0eac4623 LP |
141 | DnsServer *manager_get_dns_server(Manager *m); |
142 | void manager_next_dns_server(Manager *m); | |
143 | ||
12bf2331 | 144 | DnssecMode dns_server_get_dnssec_mode(DnsServer *s); |
c9299be2 | 145 | DnsOverTlsMode dns_server_get_dns_over_tls_mode(DnsServer *s); |
12bf2331 | 146 | |
8300ba21 TG |
147 | DEFINE_TRIVIAL_CLEANUP_FUNC(DnsServer*, dns_server_unref); |
148 | ||
d5099efc | 149 | extern const struct hash_ops dns_server_hash_ops; |
ce7c8b20 LP |
150 | |
151 | void dns_server_flush_cache(DnsServer *s); | |
59c0fd0e LP |
152 | |
153 | void dns_server_reset_features(DnsServer *s); | |
154 | void dns_server_reset_features_all(DnsServer *s); | |
cf84484a LP |
155 | |
156 | void dns_server_dump(DnsServer *s, FILE *f); | |
904dcaf9 LP |
157 | |
158 | void dns_server_unref_stream(DnsServer *s); | |
f76fa088 LP |
159 | |
160 | DnsScope *dns_server_scope(DnsServer *s); |