1 /* SPDX-License-Identifier: LGPL-2.1+ */
5 This file is part of systemd.
7 Copyright 2014 Tom Gundersen <teg@jklm.no>
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.
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.
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/>.
24 #include "sd-netlink.h"
25 #include "sd-network.h"
29 #include "ordered-set.h"
30 #include "resolve-util.h"
32 typedef struct Manager Manager
;
34 #include "resolved-conf.h"
35 #include "resolved-dns-query.h"
36 #include "resolved-dns-search-domain.h"
37 #include "resolved-dns-server.h"
38 #include "resolved-dns-stream.h"
39 #include "resolved-dns-trust-anchor.h"
40 #include "resolved-link.h"
42 #define MANAGER_SEARCH_DOMAINS_MAX 32
43 #define MANAGER_DNS_SERVERS_MAX 32
48 ResolveSupport llmnr_support
;
49 ResolveSupport mdns_support
;
50 DnssecMode dnssec_mode
;
52 DnsStubListenerMode dns_stub_listener_mode
;
58 sd_event_source
*rtnl_event_source
;
60 sd_network_monitor
*network_monitor
;
61 sd_event_source
*network_event_source
;
63 /* DNS query management */
64 Hashmap
*dns_transactions
;
65 LIST_HEAD(DnsQuery
, dns_queries
);
66 unsigned n_dns_queries
;
68 LIST_HEAD(DnsStream
, dns_streams
);
69 unsigned n_dns_streams
;
72 LIST_HEAD(DnsServer
, dns_servers
);
73 LIST_HEAD(DnsServer
, fallback_dns_servers
);
74 unsigned n_dns_servers
; /* counts both main and fallback */
75 DnsServer
*current_dns_server
;
77 LIST_HEAD(DnsSearchDomain
, search_domains
);
78 unsigned n_search_domains
;
80 bool need_builtin_fallbacks
:1;
82 bool read_resolv_conf
:1;
83 usec_t resolv_conf_mtime
;
85 DnsTrustAnchor trust_anchor
;
87 LIST_HEAD(DnsScope
, dns_scopes
);
88 DnsScope
*unicast_scope
;
91 int llmnr_ipv4_udp_fd
;
92 int llmnr_ipv6_udp_fd
;
93 int llmnr_ipv4_tcp_fd
;
94 int llmnr_ipv6_tcp_fd
;
96 sd_event_source
*llmnr_ipv4_udp_event_source
;
97 sd_event_source
*llmnr_ipv6_udp_event_source
;
98 sd_event_source
*llmnr_ipv4_tcp_event_source
;
99 sd_event_source
*llmnr_ipv6_tcp_event_source
;
105 sd_event_source
*mdns_ipv4_event_source
;
106 sd_event_source
*mdns_ipv6_event_source
;
110 sd_event_source
*bus_retry_event_source
;
112 /* The hostname we publish on LLMNR and mDNS */
114 char *llmnr_hostname
;
116 DnsResourceKey
*llmnr_host_ipv4_key
;
117 DnsResourceKey
*llmnr_host_ipv6_key
;
118 DnsResourceKey
*mdns_host_ipv4_key
;
119 DnsResourceKey
*mdns_host_ipv6_key
;
121 /* Watch the system hostname */
123 sd_event_source
*hostname_event_source
;
125 /* Watch for system suspends */
126 sd_bus_slot
*prepare_for_sleep_slot
;
128 sd_event_source
*sigusr1_event_source
;
129 sd_event_source
*sigusr2_event_source
;
130 sd_event_source
*sigrtmin1_event_source
;
132 unsigned n_transactions_total
;
133 unsigned n_dnssec_verdict
[_DNSSEC_VERDICT_MAX
];
135 /* Data from /etc/hosts */
136 Set
* etc_hosts_by_address
;
137 Hashmap
* etc_hosts_by_name
;
138 usec_t etc_hosts_last
, etc_hosts_mtime
;
140 /* Local DNS stub on 127.0.0.53:53 */
144 sd_event_source
*dns_stub_udp_event_source
;
145 sd_event_source
*dns_stub_tcp_event_source
;
150 int manager_new(Manager
**ret
);
151 Manager
* manager_free(Manager
*m
);
153 int manager_start(Manager
*m
);
155 uint32_t manager_find_mtu(Manager
*m
);
157 int manager_write(Manager
*m
, int fd
, DnsPacket
*p
);
158 int manager_send(Manager
*m
, int fd
, int ifindex
, int family
, const union in_addr_union
*destination
, uint16_t port
, const union in_addr_union
*source
, DnsPacket
*p
);
159 int manager_recv(Manager
*m
, int fd
, DnsProtocol protocol
, DnsPacket
**ret
);
161 int manager_find_ifindex(Manager
*m
, int family
, const union in_addr_union
*in_addr
);
162 LinkAddress
* manager_find_link_address(Manager
*m
, int family
, const union in_addr_union
*in_addr
);
164 void manager_refresh_rrs(Manager
*m
);
165 int manager_next_hostname(Manager
*m
);
167 bool manager_our_packet(Manager
*m
, DnsPacket
*p
);
168 DnsScope
* manager_find_scope(Manager
*m
, DnsPacket
*p
);
170 void manager_verify_all(Manager
*m
);
172 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager
*, manager_free
);
174 #define EXTRA_CMSG_SPACE 1024
176 int manager_is_own_hostname(Manager
*m
, const char *name
);
178 int manager_compile_dns_servers(Manager
*m
, OrderedSet
**servers
);
179 int manager_compile_search_domains(Manager
*m
, OrderedSet
**domains
, int filter_route
);
181 DnssecMode
manager_get_dnssec_mode(Manager
*m
);
182 bool manager_dnssec_supported(Manager
*m
);
184 void manager_dnssec_verdict(Manager
*m
, DnssecVerdict verdict
, const DnsResourceKey
*key
);
186 bool manager_routable(Manager
*m
, int family
);
188 void manager_flush_caches(Manager
*m
);
189 void manager_reset_server_features(Manager
*m
);
191 void manager_cleanup_saved_user(Manager
*m
);