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
;
106 Hashmap
*dnssd_services
;
108 sd_event_source
*mdns_ipv4_event_source
;
109 sd_event_source
*mdns_ipv6_event_source
;
113 sd_event_source
*bus_retry_event_source
;
115 /* The hostname we publish on LLMNR and mDNS */
117 char *llmnr_hostname
;
119 DnsResourceKey
*llmnr_host_ipv4_key
;
120 DnsResourceKey
*llmnr_host_ipv6_key
;
121 DnsResourceKey
*mdns_host_ipv4_key
;
122 DnsResourceKey
*mdns_host_ipv6_key
;
124 /* Watch the system hostname */
126 sd_event_source
*hostname_event_source
;
128 /* Watch for system suspends */
129 sd_bus_slot
*prepare_for_sleep_slot
;
131 sd_event_source
*sigusr1_event_source
;
132 sd_event_source
*sigusr2_event_source
;
133 sd_event_source
*sigrtmin1_event_source
;
135 unsigned n_transactions_total
;
136 unsigned n_dnssec_verdict
[_DNSSEC_VERDICT_MAX
];
138 /* Data from /etc/hosts */
139 Set
* etc_hosts_by_address
;
140 Hashmap
* etc_hosts_by_name
;
141 usec_t etc_hosts_last
, etc_hosts_mtime
;
143 /* Local DNS stub on 127.0.0.53:53 */
147 sd_event_source
*dns_stub_udp_event_source
;
148 sd_event_source
*dns_stub_tcp_event_source
;
150 Hashmap
*polkit_registry
;
155 int manager_new(Manager
**ret
);
156 Manager
* manager_free(Manager
*m
);
158 int manager_start(Manager
*m
);
160 uint32_t manager_find_mtu(Manager
*m
);
162 int manager_write(Manager
*m
, int fd
, DnsPacket
*p
);
163 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
);
164 int manager_recv(Manager
*m
, int fd
, DnsProtocol protocol
, DnsPacket
**ret
);
166 int manager_find_ifindex(Manager
*m
, int family
, const union in_addr_union
*in_addr
);
167 LinkAddress
* manager_find_link_address(Manager
*m
, int family
, const union in_addr_union
*in_addr
);
169 void manager_refresh_rrs(Manager
*m
);
170 int manager_next_hostname(Manager
*m
);
172 bool manager_our_packet(Manager
*m
, DnsPacket
*p
);
173 DnsScope
* manager_find_scope(Manager
*m
, DnsPacket
*p
);
175 void manager_verify_all(Manager
*m
);
177 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager
*, manager_free
);
179 #define EXTRA_CMSG_SPACE 1024
181 int manager_is_own_hostname(Manager
*m
, const char *name
);
183 int manager_compile_dns_servers(Manager
*m
, OrderedSet
**servers
);
184 int manager_compile_search_domains(Manager
*m
, OrderedSet
**domains
, int filter_route
);
186 DnssecMode
manager_get_dnssec_mode(Manager
*m
);
187 bool manager_dnssec_supported(Manager
*m
);
189 void manager_dnssec_verdict(Manager
*m
, DnssecVerdict verdict
, const DnsResourceKey
*key
);
191 bool manager_routable(Manager
*m
, int family
);
193 void manager_flush_caches(Manager
*m
);
194 void manager_reset_server_features(Manager
*m
);
196 void manager_cleanup_saved_user(Manager
*m
);
198 bool manager_next_dnssd_names(Manager
*m
);