src/resolve/resolved-manager.h

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