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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 */ |
da9de738 YW |
59 | uint16_t port; |
60 | char *server_name; | |
74b2466e | 61 | |
6cb08a89 | 62 | char *server_string; |
8aa5afd2 | 63 | char *server_string_full; |
51bc63fe LP |
64 | |
65 | /* The long-lived stream towards this server. */ | |
98767d75 | 66 | DnsStream *stream; |
6cb08a89 | 67 | |
56ddbf10 | 68 | #if ENABLE_DNS_OVER_TLS |
6016fcb0 | 69 | DnsTlsServerData dnstls_data; |
5d67a7ae IT |
70 | #endif |
71 | ||
f4461e56 LP |
72 | DnsServerFeatureLevel verified_feature_level; |
73 | DnsServerFeatureLevel possible_feature_level; | |
de54e62b | 74 | |
d74fb368 | 75 | size_t received_udp_packet_max; |
de54e62b | 76 | |
6bb2c085 LP |
77 | unsigned n_failed_udp; |
78 | unsigned n_failed_tcp; | |
5d67a7ae | 79 | unsigned n_failed_tls; |
de54e62b | 80 | |
6bb2c085 | 81 | bool packet_truncated:1; |
de54e62b LP |
82 | bool packet_bad_opt:1; |
83 | bool packet_rrsig_missing:1; | |
84 | ||
be808ea0 TG |
85 | usec_t verified_usec; |
86 | usec_t features_grace_period_usec; | |
74b2466e | 87 | |
1e02e182 LP |
88 | /* Whether we already warned about downgrading to non-DNSSEC mode for this server */ |
89 | bool warned_downgrade:1; | |
90 | ||
b652d4a2 LP |
91 | /* Used when GC'ing old DNS servers when configuration changes. */ |
92 | bool marked:1; | |
93 | ||
0eac4623 LP |
94 | /* If linked is set, then this server appears in the servers linked list */ |
95 | bool linked:1; | |
74b2466e LP |
96 | LIST_FIELDS(DnsServer, servers); |
97 | }; | |
98 | ||
99 | int dns_server_new( | |
100 | Manager *m, | |
0b58db65 | 101 | DnsServer **ret, |
4e945a6f | 102 | DnsServerType type, |
0b58db65 | 103 | Link *link, |
0dd25fb9 | 104 | int family, |
2817157b | 105 | const union in_addr_union *address, |
da9de738 | 106 | uint16_t port, |
2e22a54f GL |
107 | int ifindex, |
108 | const char *server_string); | |
74b2466e | 109 | |
91b14d6f TG |
110 | DnsServer* dns_server_ref(DnsServer *s); |
111 | DnsServer* dns_server_unref(DnsServer *s); | |
87f5a193 | 112 | |
0eac4623 | 113 | void dns_server_unlink(DnsServer *s); |
0b58db65 | 114 | void dns_server_move_back_and_unmark(DnsServer *s); |
0eac4623 | 115 | |
dbc4661a | 116 | void dns_server_packet_received(DnsServer *s, int protocol, DnsServerFeatureLevel level, size_t size); |
3da3cdd5 | 117 | void dns_server_packet_lost(DnsServer *s, int protocol, DnsServerFeatureLevel level); |
6bb2c085 | 118 | void dns_server_packet_truncated(DnsServer *s, DnsServerFeatureLevel level); |
de54e62b LP |
119 | void dns_server_packet_rrsig_missing(DnsServer *s, DnsServerFeatureLevel level); |
120 | void dns_server_packet_bad_opt(DnsServer *s, DnsServerFeatureLevel level); | |
d001e0a3 | 121 | void dns_server_packet_rcode_downgrade(DnsServer *s, DnsServerFeatureLevel level); |
9df3ba6c | 122 | |
f4461e56 LP |
123 | DnsServerFeatureLevel dns_server_possible_feature_level(DnsServer *s); |
124 | ||
519ef046 LP |
125 | int dns_server_adjust_opt(DnsServer *server, DnsPacket *packet, DnsServerFeatureLevel level); |
126 | ||
6cb08a89 | 127 | const char *dns_server_string(DnsServer *server); |
8aa5afd2 | 128 | const char *dns_server_string_full(DnsServer *server); |
2817157b | 129 | int dns_server_ifindex(const DnsServer *s); |
da9de738 | 130 | uint16_t dns_server_port(const DnsServer *s); |
6cb08a89 | 131 | |
92ec902a LP |
132 | bool dns_server_dnssec_supported(DnsServer *server); |
133 | ||
1e02e182 LP |
134 | void dns_server_warn_downgrade(DnsServer *server); |
135 | ||
1b860092 | 136 | DnsServer *dns_server_find(DnsServer *first, int family, const union in_addr_union *in_addr, uint16_t port, int ifindex, const char *name); |
4b95f179 LP |
137 | |
138 | void dns_server_unlink_all(DnsServer *first); | |
139 | void dns_server_unlink_marked(DnsServer *first); | |
140 | void dns_server_mark_all(DnsServer *first); | |
f2f1dbe5 | 141 | |
4b95f179 | 142 | DnsServer *manager_get_first_dns_server(Manager *m, DnsServerType t); |
636e813d | 143 | |
0eac4623 | 144 | DnsServer *manager_set_dns_server(Manager *m, DnsServer *s); |
0eac4623 LP |
145 | DnsServer *manager_get_dns_server(Manager *m); |
146 | void manager_next_dns_server(Manager *m); | |
147 | ||
12bf2331 | 148 | DnssecMode dns_server_get_dnssec_mode(DnsServer *s); |
c9299be2 | 149 | DnsOverTlsMode dns_server_get_dns_over_tls_mode(DnsServer *s); |
12bf2331 | 150 | |
8300ba21 TG |
151 | DEFINE_TRIVIAL_CLEANUP_FUNC(DnsServer*, dns_server_unref); |
152 | ||
d5099efc | 153 | extern const struct hash_ops dns_server_hash_ops; |
ce7c8b20 LP |
154 | |
155 | void dns_server_flush_cache(DnsServer *s); | |
59c0fd0e LP |
156 | |
157 | void dns_server_reset_features(DnsServer *s); | |
158 | void dns_server_reset_features_all(DnsServer *s); | |
cf84484a LP |
159 | |
160 | void dns_server_dump(DnsServer *s, FILE *f); | |
904dcaf9 LP |
161 | |
162 | void dns_server_unref_stream(DnsServer *s); | |
f76fa088 LP |
163 | |
164 | DnsScope *dns_server_scope(DnsServer *s); |