src/resolve/resolved-manager.h

   1 #pragma once
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2014 Tom Gundersen <teg@jklm.no>
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include "sd-event.h"
  23 #include "sd-netlink.h"
  24 #include "sd-network.h"
  25
  26 #include "hashmap.h"
  27 #include "list.h"
  28 #include "ordered-set.h"
  29 #include "resolve-util.h"
  30
  31 typedef struct Manager Manager;
  32
  33 #include "resolved-dns-query.h"
  34 #include "resolved-dns-search-domain.h"
  35 #include "resolved-dns-server.h"
  36 #include "resolved-dns-stream.h"
  37 #include "resolved-dns-trust-anchor.h"
  38 #include "resolved-link.h"
  39
  40 #define MANAGER_SEARCH_DOMAINS_MAX 32
  41 #define MANAGER_DNS_SERVERS_MAX 32
  42
  43 struct Manager {
  44         sd_event *event;
  45
  46         ResolveSupport llmnr_support;
  47         ResolveSupport mdns_support;
  48         DnssecMode dnssec_mode;
  49
  50         /* Network */
  51         Hashmap *links;
  52
  53         sd_netlink *rtnl;
  54         sd_event_source *rtnl_event_source;
  55
  56         sd_network_monitor *network_monitor;
  57         sd_event_source *network_event_source;
  58
  59         /* DNS query management */
  60         Hashmap *dns_transactions;
  61         LIST_HEAD(DnsQuery, dns_queries);
  62         unsigned n_dns_queries;
  63
  64         LIST_HEAD(DnsStream, dns_streams);
  65         unsigned n_dns_streams;
  66
  67         /* Unicast dns */
  68         LIST_HEAD(DnsServer, dns_servers);
  69         LIST_HEAD(DnsServer, fallback_dns_servers);
  70         unsigned n_dns_servers; /* counts both main and fallback */
  71         DnsServer *current_dns_server;
  72
  73         LIST_HEAD(DnsSearchDomain, search_domains);
  74         unsigned n_search_domains;
  75         bool permit_domain_search;
  76
  77         bool need_builtin_fallbacks:1;
  78
  79         bool read_resolv_conf:1;
  80         usec_t resolv_conf_mtime;
  81
  82         DnsTrustAnchor trust_anchor;
  83
  84         LIST_HEAD(DnsScope, dns_scopes);
  85         DnsScope *unicast_scope;
  86
  87         /* LLMNR */
  88         int llmnr_ipv4_udp_fd;
  89         int llmnr_ipv6_udp_fd;
  90         int llmnr_ipv4_tcp_fd;
  91         int llmnr_ipv6_tcp_fd;
  92
  93         sd_event_source *llmnr_ipv4_udp_event_source;
  94         sd_event_source *llmnr_ipv6_udp_event_source;
  95         sd_event_source *llmnr_ipv4_tcp_event_source;
  96         sd_event_source *llmnr_ipv6_tcp_event_source;
  97
  98         /* mDNS */
  99         int mdns_ipv4_fd;
 100         int mdns_ipv6_fd;
 101
 102         sd_event_source *mdns_ipv4_event_source;
 103         sd_event_source *mdns_ipv6_event_source;
 104
 105         /* dbus */
 106         sd_bus *bus;
 107         sd_event_source *bus_retry_event_source;
 108
 109         /* The hostname we publish on LLMNR and mDNS */
 110         char *llmnr_hostname;
 111         char *mdns_hostname;
 112         DnsResourceKey *llmnr_host_ipv4_key;
 113         DnsResourceKey *llmnr_host_ipv6_key;
 114
 115         /* Watch the system hostname */
 116         int hostname_fd;
 117         sd_event_source *hostname_event_source;
 118
 119         /* Watch for system suspends */
 120         sd_bus_slot *prepare_for_sleep_slot;
 121
 122         sd_event_source *sigusr1_event_source;
 123
 124         unsigned n_transactions_total;
 125         unsigned n_dnssec_verdict[_DNSSEC_VERDICT_MAX];
 126
 127         /* Data from /etc/hosts */
 128         Set* etc_hosts_by_address;
 129         Hashmap* etc_hosts_by_name;
 130         usec_t etc_hosts_last, etc_hosts_mtime;
 131 };
 132
 133 /* Manager */
 134
 135 int manager_new(Manager **ret);
 136 Manager* manager_free(Manager *m);
 137
 138 int manager_start(Manager *m);
 139
 140 uint32_t manager_find_mtu(Manager *m);
 141
 142 int manager_write(Manager *m, int fd, DnsPacket *p);
 143 int manager_send(Manager *m, int fd, int ifindex, int family, const union in_addr_union *addr, uint16_t port, DnsPacket *p);
 144 int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret);
 145
 146 int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr);
 147 LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr);
 148
 149 void manager_refresh_rrs(Manager *m);
 150 int manager_next_hostname(Manager *m);
 151
 152 bool manager_our_packet(Manager *m, DnsPacket *p);
 153 DnsScope* manager_find_scope(Manager *m, DnsPacket *p);
 154
 155 void manager_verify_all(Manager *m);
 156
 157 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 158
 159 #define EXTRA_CMSG_SPACE 1024
 160
 161 int manager_is_own_hostname(Manager *m, const char *name);
 162
 163 int manager_compile_dns_servers(Manager *m, OrderedSet **servers);
 164 int manager_compile_search_domains(Manager *m, OrderedSet **domains);
 165
 166 DnssecMode manager_get_dnssec_mode(Manager *m);
 167 bool manager_dnssec_supported(Manager *m);
 168
 169 void manager_dnssec_verdict(Manager *m, DnssecVerdict verdict, const DnsResourceKey *key);
 170
 171 bool manager_routable(Manager *m, int family);