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_secure, n_dnssec_insecure, n_dnssec_bogus, n_dnssec_indeterminate;
 127 };
 128
 129 /* Manager */
 130
 131 int manager_new(Manager **ret);
 132 Manager* manager_free(Manager *m);
 133
 134 int manager_start(Manager *m);
 135
 136 uint32_t manager_find_mtu(Manager *m);
 137
 138 int manager_write(Manager *m, int fd, DnsPacket *p);
 139 int manager_send(Manager *m, int fd, int ifindex, int family, const union in_addr_union *addr, uint16_t port, DnsPacket *p);
 140 int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret);
 141
 142 int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr);
 143 LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr);
 144
 145 void manager_refresh_rrs(Manager *m);
 146 int manager_next_hostname(Manager *m);
 147
 148 bool manager_our_packet(Manager *m, DnsPacket *p);
 149 DnsScope* manager_find_scope(Manager *m, DnsPacket *p);
 150
 151 void manager_verify_all(Manager *m);
 152
 153 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 154
 155 #define EXTRA_CMSG_SPACE 1024
 156
 157 int manager_is_own_hostname(Manager *m, const char *name);
 158
 159 int manager_compile_dns_servers(Manager *m, OrderedSet **servers);
 160 int manager_compile_search_domains(Manager *m, OrderedSet **domains);