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1 | /* SPDX-License-Identifier: LGPL-2.1+ */ | |
2 | #pragma once | |
3 | ||
4 | /*** | |
5 | This file is part of systemd. | |
6 | ||
7 | Copyright 2014 Lennart Poettering | |
8 | ||
9 | systemd is free software; you can redistribute it and/or modify it | |
10 | under the terms of the GNU Lesser General Public License as published by | |
11 | the Free Software Foundation; either version 2.1 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | systemd is distributed in the hope that it will be useful, but | |
15 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | Lesser General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU Lesser General Public License | |
20 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
21 | ***/ | |
22 | ||
23 | #include "list.h" | |
24 | ||
25 | typedef struct DnsScope DnsScope; | |
26 | ||
27 | #include "resolved-dns-cache.h" | |
28 | #include "resolved-dns-dnssec.h" | |
29 | #include "resolved-dns-packet.h" | |
30 | #include "resolved-dns-query.h" | |
31 | #include "resolved-dns-search-domain.h" | |
32 | #include "resolved-dns-server.h" | |
33 | #include "resolved-dns-stream.h" | |
34 | #include "resolved-dns-zone.h" | |
35 | #include "resolved-link.h" | |
36 | ||
37 | typedef enum DnsScopeMatch { | |
38 | DNS_SCOPE_NO, | |
39 | DNS_SCOPE_MAYBE, | |
40 | DNS_SCOPE_YES, | |
41 | _DNS_SCOPE_MATCH_MAX, | |
42 | _DNS_SCOPE_INVALID = -1 | |
43 | } DnsScopeMatch; | |
44 | ||
45 | struct DnsScope { | |
46 | Manager *manager; | |
47 | ||
48 | DnsProtocol protocol; | |
49 | int family; | |
50 | DnssecMode dnssec_mode; | |
51 | ||
52 | Link *link; | |
53 | ||
54 | DnsCache cache; | |
55 | DnsZone zone; | |
56 | ||
57 | OrderedHashmap *conflict_queue; | |
58 | sd_event_source *conflict_event_source; | |
59 | ||
60 | bool announced:1; | |
61 | sd_event_source *announce_event_source; | |
62 | ||
63 | RateLimit ratelimit; | |
64 | ||
65 | usec_t resend_timeout; | |
66 | usec_t max_rtt; | |
67 | ||
68 | LIST_HEAD(DnsQueryCandidate, query_candidates); | |
69 | ||
70 | /* Note that we keep track of ongoing transactions in two | |
71 | * ways: once in a hashmap, indexed by the rr key, and once in | |
72 | * a linked list. We use the hashmap to quickly find | |
73 | * transactions we can reuse for a key. But note that there | |
74 | * might be multiple transactions for the same key (because | |
75 | * the zone probing can't reuse a transaction answered from | |
76 | * the zone or the cache), and the hashmap only tracks the | |
77 | * most recent entry. */ | |
78 | Hashmap *transactions_by_key; | |
79 | LIST_HEAD(DnsTransaction, transactions); | |
80 | ||
81 | LIST_FIELDS(DnsScope, scopes); | |
82 | }; | |
83 | ||
84 | int dns_scope_new(Manager *m, DnsScope **ret, Link *l, DnsProtocol p, int family); | |
85 | DnsScope* dns_scope_free(DnsScope *s); | |
86 | ||
87 | void dns_scope_packet_received(DnsScope *s, usec_t rtt); | |
88 | void dns_scope_packet_lost(DnsScope *s, usec_t usec); | |
89 | ||
90 | int dns_scope_emit_udp(DnsScope *s, int fd, DnsPacket *p); | |
91 | int dns_scope_socket_tcp(DnsScope *s, int family, const union in_addr_union *address, DnsServer *server, uint16_t port); | |
92 | int dns_scope_socket_udp(DnsScope *s, DnsServer *server, uint16_t port); | |
93 | ||
94 | DnsScopeMatch dns_scope_good_domain(DnsScope *s, int ifindex, uint64_t flags, const char *domain); | |
95 | bool dns_scope_good_key(DnsScope *s, const DnsResourceKey *key); | |
96 | ||
97 | DnsServer *dns_scope_get_dns_server(DnsScope *s); | |
98 | void dns_scope_next_dns_server(DnsScope *s); | |
99 | ||
100 | int dns_scope_llmnr_membership(DnsScope *s, bool b); | |
101 | int dns_scope_mdns_membership(DnsScope *s, bool b); | |
102 | ||
103 | int dns_scope_make_reply_packet(DnsScope *s, uint16_t id, int rcode, DnsQuestion *q, DnsAnswer *answer, DnsAnswer *soa, bool tentative, DnsPacket **ret); | |
104 | void dns_scope_process_query(DnsScope *s, DnsStream *stream, DnsPacket *p); | |
105 | ||
106 | DnsTransaction *dns_scope_find_transaction(DnsScope *scope, DnsResourceKey *key, bool cache_ok); | |
107 | ||
108 | int dns_scope_notify_conflict(DnsScope *scope, DnsResourceRecord *rr); | |
109 | void dns_scope_check_conflicts(DnsScope *scope, DnsPacket *p); | |
110 | ||
111 | void dns_scope_dump(DnsScope *s, FILE *f); | |
112 | ||
113 | DnsSearchDomain *dns_scope_get_search_domains(DnsScope *s); | |
114 | ||
115 | bool dns_scope_name_needs_search_domain(DnsScope *s, const char *name); | |
116 | ||
117 | bool dns_scope_network_good(DnsScope *s); | |
118 | ||
119 | int dns_scope_ifindex(DnsScope *s); | |
120 | ||
121 | int dns_scope_announce(DnsScope *scope, bool goodbye); |