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-link.h"
  48
  49 #define MANAGER_SEARCH_DOMAINS_MAX 32
  50 #define MANAGER_DNS_SERVERS_MAX 32
  51
  52 struct Manager {
  53         sd_event *event;
  54
  55         Support llmnr_support;
  56
  57         /* Network */
  58         Hashmap *links;
  59
  60         sd_netlink *rtnl;
  61         sd_event_source *rtnl_event_source;
  62
  63         sd_network_monitor *network_monitor;
  64         sd_event_source *network_event_source;
  65
  66         /* DNS query management */
  67         Hashmap *dns_transactions;
  68         LIST_HEAD(DnsQuery, dns_queries);
  69         unsigned n_dns_queries;
  70
  71         LIST_HEAD(DnsStream, dns_streams);
  72         unsigned n_dns_streams;
  73
  74         /* Unicast dns */
  75         LIST_HEAD(DnsServer, dns_servers);
  76         LIST_HEAD(DnsServer, fallback_dns_servers);
  77         unsigned n_dns_servers; /* counts both main and fallback */
  78         DnsServer *current_dns_server;
  79
  80         LIST_HEAD(DnsSearchDomain, search_domains);
  81         unsigned n_search_domains;
  82
  83         bool need_builtin_fallbacks:1;
  84
  85         bool read_resolv_conf:1;
  86         usec_t resolv_conf_mtime;
  87
  88         LIST_HEAD(DnsScope, dns_scopes);
  89         DnsScope *unicast_scope;
  90
  91         /* LLMNR */
  92         int llmnr_ipv4_udp_fd;
  93         int llmnr_ipv6_udp_fd;
  94         int llmnr_ipv4_tcp_fd;
  95         int llmnr_ipv6_tcp_fd;
  96
  97         sd_event_source *llmnr_ipv4_udp_event_source;
  98         sd_event_source *llmnr_ipv6_udp_event_source;
  99         sd_event_source *llmnr_ipv4_tcp_event_source;
 100         sd_event_source *llmnr_ipv6_tcp_event_source;
 101
 102         /* dbus */
 103         sd_bus *bus;
 104         sd_event_source *bus_retry_event_source;
 105
 106         /* The hostname we publish on LLMNR and mDNS */
 107         char *llmnr_hostname;
 108         char *mdns_hostname;
 109         DnsResourceKey *llmnr_host_ipv4_key;
 110         DnsResourceKey *llmnr_host_ipv6_key;
 111
 112         /* Watch the system hostname */
 113         int hostname_fd;
 114         sd_event_source *hostname_event_source;
 115
 116         /* Watch for system suspends */
 117         sd_bus_slot *prepare_for_sleep_slot;
 118
 119         sd_event_source *sigusr1_event_source;
 120 };
 121
 122 /* Manager */
 123
 124 int manager_new(Manager **ret);
 125 Manager* manager_free(Manager *m);
 126
 127 int manager_start(Manager *m);
 128
 129 uint32_t manager_find_mtu(Manager *m);
 130
 131 int manager_write(Manager *m, int fd, DnsPacket *p);
 132 int manager_send(Manager *m, int fd, int ifindex, int family, const union in_addr_union *addr, uint16_t port, DnsPacket *p);
 133 int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret);
 134
 135 int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr);
 136 LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr);
 137
 138 void manager_refresh_rrs(Manager *m);
 139 int manager_next_hostname(Manager *m);
 140
 141 bool manager_our_packet(Manager *m, DnsPacket *p);
 142 DnsScope* manager_find_scope(Manager *m, DnsPacket *p);
 143
 144 void manager_verify_all(Manager *m);
 145
 146 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 147
 148 #define EXTRA_CMSG_SPACE 1024
 149
 150 int manager_is_own_hostname(Manager *m, const char *name);
 151
 152 int manager_compile_dns_servers(Manager *m, OrderedSet **servers);
 153 int manager_compile_search_domains(Manager *m, OrderedSet **domains);
 154
 155 const char* support_to_string(Support p) _const_;
 156 int support_from_string(const char *s) _pure_;