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
  58         /* Network */
  59         Hashmap *links;
  60
  61         sd_netlink *rtnl;
  62         sd_event_source *rtnl_event_source;
  63
  64         sd_network_monitor *network_monitor;
  65         sd_event_source *network_event_source;
  66
  67         /* DNS query management */
  68         Hashmap *dns_transactions;
  69         LIST_HEAD(DnsQuery, dns_queries);
  70         unsigned n_dns_queries;
  71
  72         LIST_HEAD(DnsStream, dns_streams);
  73         unsigned n_dns_streams;
  74
  75         /* Unicast dns */
  76         LIST_HEAD(DnsServer, dns_servers);
  77         LIST_HEAD(DnsServer, fallback_dns_servers);
  78         unsigned n_dns_servers; /* counts both main and fallback */
  79         DnsServer *current_dns_server;
  80
  81         LIST_HEAD(DnsSearchDomain, search_domains);
  82         unsigned n_search_domains;
  83
  84         bool need_builtin_fallbacks:1;
  85
  86         bool read_resolv_conf:1;
  87         usec_t resolv_conf_mtime;
  88
  89         DnsTrustAnchor trust_anchor;
  90
  91         LIST_HEAD(DnsScope, dns_scopes);
  92         DnsScope *unicast_scope;
  93
  94         /* LLMNR */
  95         int llmnr_ipv4_udp_fd;
  96         int llmnr_ipv6_udp_fd;
  97         int llmnr_ipv4_tcp_fd;
  98         int llmnr_ipv6_tcp_fd;
  99
 100         sd_event_source *llmnr_ipv4_udp_event_source;
 101         sd_event_source *llmnr_ipv6_udp_event_source;
 102         sd_event_source *llmnr_ipv4_tcp_event_source;
 103         sd_event_source *llmnr_ipv6_tcp_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
 125 /* Manager */
 126
 127 int manager_new(Manager **ret);
 128 Manager* manager_free(Manager *m);
 129
 130 int manager_start(Manager *m);
 131
 132 uint32_t manager_find_mtu(Manager *m);
 133
 134 int manager_write(Manager *m, int fd, DnsPacket *p);
 135 int manager_send(Manager *m, int fd, int ifindex, int family, const union in_addr_union *addr, uint16_t port, DnsPacket *p);
 136 int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret);
 137
 138 int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr);
 139 LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr);
 140
 141 void manager_refresh_rrs(Manager *m);
 142 int manager_next_hostname(Manager *m);
 143
 144 bool manager_our_packet(Manager *m, DnsPacket *p);
 145 DnsScope* manager_find_scope(Manager *m, DnsPacket *p);
 146
 147 void manager_verify_all(Manager *m);
 148
 149 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 150
 151 #define EXTRA_CMSG_SPACE 1024
 152
 153 int manager_is_own_hostname(Manager *m, const char *name);
 154
 155 int manager_compile_dns_servers(Manager *m, OrderedSet **servers);
 156 int manager_compile_search_domains(Manager *m, OrderedSet **domains);
 157
 158 const char* support_to_string(Support p) _const_;
 159 int support_from_string(const char *s) _pure_;