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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 | ||
5d67a7ae IT |
12 | #if HAVE_GNUTLS |
13 | #include <gnutls/gnutls.h> | |
14 | #endif | |
15 | ||
74b2466e | 16 | typedef struct DnsServer DnsServer; |
74b2466e | 17 | |
4e945a6f LP |
18 | typedef enum DnsServerType { |
19 | DNS_SERVER_SYSTEM, | |
20 | DNS_SERVER_FALLBACK, | |
21 | DNS_SERVER_LINK, | |
22 | } DnsServerType; | |
e3309036 ZJS |
23 | #define _DNS_SERVER_TYPE_MAX (DNS_SERVER_LINK + 1) |
24 | ||
25 | const char* dns_server_type_to_string(DnsServerType i) _const_; | |
26 | DnsServerType dns_server_type_from_string(const char *s) _pure_; | |
4e945a6f | 27 | |
be808ea0 TG |
28 | typedef enum DnsServerFeatureLevel { |
29 | DNS_SERVER_FEATURE_LEVEL_TCP, | |
30 | DNS_SERVER_FEATURE_LEVEL_UDP, | |
9c5e12a4 | 31 | DNS_SERVER_FEATURE_LEVEL_EDNS0, |
5d67a7ae | 32 | DNS_SERVER_FEATURE_LEVEL_TLS_PLAIN, |
7586f4d1 | 33 | DNS_SERVER_FEATURE_LEVEL_DO, |
d74fb368 | 34 | DNS_SERVER_FEATURE_LEVEL_LARGE, |
5d67a7ae | 35 | DNS_SERVER_FEATURE_LEVEL_TLS_DO, |
be808ea0 TG |
36 | _DNS_SERVER_FEATURE_LEVEL_MAX, |
37 | _DNS_SERVER_FEATURE_LEVEL_INVALID = -1 | |
38 | } DnsServerFeatureLevel; | |
39 | ||
40 | #define DNS_SERVER_FEATURE_LEVEL_WORST 0 | |
41 | #define DNS_SERVER_FEATURE_LEVEL_BEST (_DNS_SERVER_FEATURE_LEVEL_MAX - 1) | |
5d67a7ae | 42 | #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 |
43 | |
44 | const char* dns_server_feature_level_to_string(int i) _const_; | |
45 | int dns_server_feature_level_from_string(const char *s) _pure_; | |
46 | ||
3e684349 | 47 | #include "resolved-link.h" |
be808ea0 | 48 | #include "resolved-manager.h" |
3e684349 | 49 | |
74b2466e LP |
50 | struct DnsServer { |
51 | Manager *manager; | |
74b2466e | 52 | |
91b14d6f TG |
53 | unsigned n_ref; |
54 | ||
4e945a6f | 55 | DnsServerType type; |
3c0cf502 LP |
56 | Link *link; |
57 | ||
0dd25fb9 | 58 | int family; |
74b2466e | 59 | union in_addr_union address; |
2817157b | 60 | int ifindex; /* for IPv6 link-local DNS servers */ |
74b2466e | 61 | |
6cb08a89 | 62 | char *server_string; |
98767d75 | 63 | DnsStream *stream; |
6cb08a89 | 64 | |
5d67a7ae IT |
65 | #if HAVE_GNUTLS |
66 | gnutls_certificate_credentials_t tls_cert_cred; | |
67 | gnutls_datum_t tls_session_data; | |
68 | #endif | |
69 | ||
f4461e56 LP |
70 | DnsServerFeatureLevel verified_feature_level; |
71 | DnsServerFeatureLevel possible_feature_level; | |
de54e62b | 72 | |
d74fb368 | 73 | size_t received_udp_packet_max; |
de54e62b | 74 | |
6bb2c085 LP |
75 | unsigned n_failed_udp; |
76 | unsigned n_failed_tcp; | |
5d67a7ae | 77 | unsigned n_failed_tls; |
de54e62b | 78 | |
6bb2c085 | 79 | bool packet_truncated:1; |
de54e62b LP |
80 | bool packet_bad_opt:1; |
81 | bool packet_rrsig_missing:1; | |
82 | ||
be808ea0 TG |
83 | usec_t verified_usec; |
84 | usec_t features_grace_period_usec; | |
74b2466e | 85 | |
1e02e182 LP |
86 | /* Whether we already warned about downgrading to non-DNSSEC mode for this server */ |
87 | bool warned_downgrade:1; | |
88 | ||
b652d4a2 LP |
89 | /* Used when GC'ing old DNS servers when configuration changes. */ |
90 | bool marked:1; | |
91 | ||
0eac4623 LP |
92 | /* If linked is set, then this server appears in the servers linked list */ |
93 | bool linked:1; | |
74b2466e LP |
94 | LIST_FIELDS(DnsServer, servers); |
95 | }; | |
96 | ||
97 | int dns_server_new( | |
98 | Manager *m, | |
0b58db65 | 99 | DnsServer **ret, |
4e945a6f | 100 | DnsServerType type, |
0b58db65 | 101 | Link *link, |
0dd25fb9 | 102 | int family, |
2817157b LP |
103 | const union in_addr_union *address, |
104 | int ifindex); | |
74b2466e | 105 | |
91b14d6f TG |
106 | DnsServer* dns_server_ref(DnsServer *s); |
107 | DnsServer* dns_server_unref(DnsServer *s); | |
87f5a193 | 108 | |
0eac4623 | 109 | void dns_server_unlink(DnsServer *s); |
0b58db65 | 110 | void dns_server_move_back_and_unmark(DnsServer *s); |
0eac4623 | 111 | |
dbc4661a | 112 | void dns_server_packet_received(DnsServer *s, int protocol, DnsServerFeatureLevel level, size_t size); |
3da3cdd5 | 113 | void dns_server_packet_lost(DnsServer *s, int protocol, DnsServerFeatureLevel level); |
6bb2c085 | 114 | void dns_server_packet_truncated(DnsServer *s, DnsServerFeatureLevel level); |
de54e62b LP |
115 | void dns_server_packet_rrsig_missing(DnsServer *s, DnsServerFeatureLevel level); |
116 | void dns_server_packet_bad_opt(DnsServer *s, DnsServerFeatureLevel level); | |
d001e0a3 | 117 | void dns_server_packet_rcode_downgrade(DnsServer *s, DnsServerFeatureLevel level); |
9df3ba6c | 118 | |
f4461e56 LP |
119 | DnsServerFeatureLevel dns_server_possible_feature_level(DnsServer *s); |
120 | ||
519ef046 LP |
121 | int dns_server_adjust_opt(DnsServer *server, DnsPacket *packet, DnsServerFeatureLevel level); |
122 | ||
6cb08a89 | 123 | const char *dns_server_string(DnsServer *server); |
2817157b | 124 | int dns_server_ifindex(const DnsServer *s); |
6cb08a89 | 125 | |
92ec902a LP |
126 | bool dns_server_dnssec_supported(DnsServer *server); |
127 | ||
1e02e182 LP |
128 | void dns_server_warn_downgrade(DnsServer *server); |
129 | ||
b9fe94ca MP |
130 | bool dns_server_limited_domains(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 | ||
b30bf55d LP |
144 | bool dns_server_address_valid(int family, const union in_addr_union *sa); |
145 | ||
12bf2331 | 146 | DnssecMode dns_server_get_dnssec_mode(DnsServer *s); |
5d67a7ae | 147 | PrivateDnsMode dns_server_get_private_dns_mode(DnsServer *s); |
12bf2331 | 148 | |
8300ba21 TG |
149 | DEFINE_TRIVIAL_CLEANUP_FUNC(DnsServer*, dns_server_unref); |
150 | ||
d5099efc | 151 | extern const struct hash_ops dns_server_hash_ops; |
ce7c8b20 LP |
152 | |
153 | void dns_server_flush_cache(DnsServer *s); | |
59c0fd0e LP |
154 | |
155 | void dns_server_reset_features(DnsServer *s); | |
156 | void dns_server_reset_features_all(DnsServer *s); | |
cf84484a LP |
157 | |
158 | void dns_server_dump(DnsServer *s, FILE *f); |