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
  78         bool need_builtin_fallbacks:1;
  79
  80         bool read_resolv_conf:1;
  81         usec_t resolv_conf_mtime;
  82
  83         DnsTrustAnchor trust_anchor;
  84
  85         LIST_HEAD(DnsScope, dns_scopes);
  86         DnsScope *unicast_scope;
  87
  88         /* LLMNR */
  89         int llmnr_ipv4_udp_fd;
  90         int llmnr_ipv6_udp_fd;
  91         int llmnr_ipv4_tcp_fd;
  92         int llmnr_ipv6_tcp_fd;
  93
  94         sd_event_source *llmnr_ipv4_udp_event_source;
  95         sd_event_source *llmnr_ipv6_udp_event_source;
  96         sd_event_source *llmnr_ipv4_tcp_event_source;
  97         sd_event_source *llmnr_ipv6_tcp_event_source;
  98
  99         /* mDNS */
 100         int mdns_ipv4_fd;
 101         int mdns_ipv6_fd;
 102
 103         sd_event_source *mdns_ipv4_event_source;
 104         sd_event_source *mdns_ipv6_event_source;
 105
 106         /* dbus */
 107         sd_bus *bus;
 108         sd_event_source *bus_retry_event_source;
 109
 110         /* The hostname we publish on LLMNR and mDNS */
 111         char *llmnr_hostname;
 112         char *mdns_hostname;
 113         DnsResourceKey *llmnr_host_ipv4_key;
 114         DnsResourceKey *llmnr_host_ipv6_key;
 115
 116         /* Watch the system hostname */
 117         int hostname_fd;
 118         sd_event_source *hostname_event_source;
 119
 120         /* Watch for system suspends */
 121         sd_bus_slot *prepare_for_sleep_slot;
 122
 123         sd_event_source *sigusr1_event_source;
 124
 125         unsigned n_transactions_total;
 126         unsigned n_dnssec_verdict[_DNSSEC_VERDICT_MAX];
 127
 128         /* Data from /etc/hosts */
 129         Set* etc_hosts_by_address;
 130         Hashmap* etc_hosts_by_name;
 131         usec_t etc_hosts_last, etc_hosts_mtime;
 132 };
 133
 134 /* Manager */
 135
 136 int manager_new(Manager **ret);
 137 Manager* manager_free(Manager *m);
 138
 139 int manager_start(Manager *m);
 140
 141 uint32_t manager_find_mtu(Manager *m);
 142
 143 int manager_write(Manager *m, int fd, DnsPacket *p);
 144 int manager_send(Manager *m, int fd, int ifindex, int family, const union in_addr_union *addr, uint16_t port, DnsPacket *p);
 145 int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret);
 146
 147 int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr);
 148 LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr);
 149
 150 void manager_refresh_rrs(Manager *m);
 151 int manager_next_hostname(Manager *m);
 152
 153 bool manager_our_packet(Manager *m, DnsPacket *p);
 154 DnsScope* manager_find_scope(Manager *m, DnsPacket *p);
 155
 156 void manager_verify_all(Manager *m);
 157
 158 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 159
 160 #define EXTRA_CMSG_SPACE 1024
 161
 162 int manager_is_own_hostname(Manager *m, const char *name);
 163
 164 int manager_compile_dns_servers(Manager *m, OrderedSet **servers);
 165 int manager_compile_search_domains(Manager *m, OrderedSet **domains);
 166
 167 DnssecMode manager_get_dnssec_mode(Manager *m);
 168 bool manager_dnssec_supported(Manager *m);
 169
 170 void manager_dnssec_verdict(Manager *m, DnssecVerdict verdict, const DnsResourceKey *key);