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
  32 typedef struct Manager Manager;
  33 typedef enum Support Support;
  34
  35 enum Support {
  36         SUPPORT_NO,
  37         SUPPORT_YES,
  38         SUPPORT_RESOLVE,
  39         _SUPPORT_MAX,
  40         _SUPPORT_INVALID = -1
  41 };
  42
  43 #include "resolved-dns-query.h"
  44 #include "resolved-dns-search-domain.h"
  45 #include "resolved-dns-server.h"
  46 #include "resolved-dns-stream.h"
  47 #include "resolved-dns-trust-anchor.h"
  48 #include "resolved-link.h"
  49
  50 #define MANAGER_SEARCH_DOMAINS_MAX 32
  51 #define MANAGER_DNS_SERVERS_MAX 32
  52
  53 struct Manager {
  54         sd_event *event;
  55
  56         Support llmnr_support;
  57         Support mdns_support;
  58
  59         /* Network */
  60         Hashmap *links;
  61
  62         sd_netlink *rtnl;
  63         sd_event_source *rtnl_event_source;
  64
  65         sd_network_monitor *network_monitor;
  66         sd_event_source *network_event_source;
  67
  68         /* DNS query management */
  69         Hashmap *dns_transactions;
  70         LIST_HEAD(DnsQuery, dns_queries);
  71         unsigned n_dns_queries;
  72
  73         LIST_HEAD(DnsStream, dns_streams);
  74         unsigned n_dns_streams;
  75
  76         /* Unicast dns */
  77         LIST_HEAD(DnsServer, dns_servers);
  78         LIST_HEAD(DnsServer, fallback_dns_servers);
  79         unsigned n_dns_servers; /* counts both main and fallback */
  80         DnsServer *current_dns_server;
  81
  82         LIST_HEAD(DnsSearchDomain, search_domains);
  83         unsigned n_search_domains;
  84
  85         bool need_builtin_fallbacks:1;
  86
  87         bool read_resolv_conf:1;
  88         usec_t resolv_conf_mtime;
  89
  90         DnsTrustAnchor trust_anchor;
  91
  92         LIST_HEAD(DnsScope, dns_scopes);
  93         DnsScope *unicast_scope;
  94
  95         /* LLMNR */
  96         int llmnr_ipv4_udp_fd;
  97         int llmnr_ipv6_udp_fd;
  98         int llmnr_ipv4_tcp_fd;
  99         int llmnr_ipv6_tcp_fd;
 100
 101         sd_event_source *llmnr_ipv4_udp_event_source;
 102         sd_event_source *llmnr_ipv6_udp_event_source;
 103         sd_event_source *llmnr_ipv4_tcp_event_source;
 104         sd_event_source *llmnr_ipv6_tcp_event_source;
 105
 106         /* mDNS */
 107         int mdns_ipv4_fd;
 108         int mdns_ipv6_fd;
 109
 110         sd_event_source *mdns_ipv4_event_source;
 111         sd_event_source *mdns_ipv6_event_source;
 112
 113         /* dbus */
 114         sd_bus *bus;
 115         sd_event_source *bus_retry_event_source;
 116
 117         /* The hostname we publish on LLMNR and mDNS */
 118         char *llmnr_hostname;
 119         char *mdns_hostname;
 120         DnsResourceKey *llmnr_host_ipv4_key;
 121         DnsResourceKey *llmnr_host_ipv6_key;
 122
 123         /* Watch the system hostname */
 124         int hostname_fd;
 125         sd_event_source *hostname_event_source;
 126
 127         /* Watch for system suspends */
 128         sd_bus_slot *prepare_for_sleep_slot;
 129
 130         sd_event_source *sigusr1_event_source;
 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 const char* support_to_string(Support p) _const_;
 167 int support_from_string(const char *s) _pure_;