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-network.h"
  26 #include "sd-netlink.h"
  27 #include "list.h"
  28 #include "hashmap.h"
  29
  30 typedef struct Manager Manager;
  31 typedef enum Support Support;
  32
  33 enum Support {
  34         SUPPORT_NO,
  35         SUPPORT_YES,
  36         SUPPORT_RESOLVE,
  37         _SUPPORT_MAX,
  38         _SUPPORT_INVALID = -1
  39 };
  40
  41 #include "resolved-dns-query.h"
  42 #include "resolved-dns-stream.h"
  43 #include "resolved-link.h"
  44
  45 struct Manager {
  46         sd_event *event;
  47
  48         Support llmnr_support;
  49
  50         /* Network */
  51         Hashmap *links;
  52
  53         sd_netlink *rtnl;
  54         sd_event_source *rtnl_event_source;
  55
  56         sd_network_monitor *network_monitor;
  57         sd_event_source *network_event_source;
  58
  59         /* DNS query management */
  60         Hashmap *dns_transactions;
  61         LIST_HEAD(DnsQuery, dns_queries);
  62         unsigned n_dns_queries;
  63
  64         LIST_HEAD(DnsStream, dns_streams);
  65         unsigned n_dns_streams;
  66
  67         /* Unicast dns */
  68         LIST_HEAD(DnsServer, dns_servers);
  69         LIST_HEAD(DnsServer, fallback_dns_servers);
  70         DnsServer *current_dns_server;
  71
  72         bool read_resolv_conf;
  73         usec_t resolv_conf_mtime;
  74
  75         LIST_HEAD(DnsScope, dns_scopes);
  76         DnsScope *unicast_scope;
  77
  78         /* LLMNR */
  79         int llmnr_ipv4_udp_fd;
  80         int llmnr_ipv6_udp_fd;
  81         int llmnr_ipv4_tcp_fd;
  82         int llmnr_ipv6_tcp_fd;
  83
  84         sd_event_source *llmnr_ipv4_udp_event_source;
  85         sd_event_source *llmnr_ipv6_udp_event_source;
  86         sd_event_source *llmnr_ipv4_tcp_event_source;
  87         sd_event_source *llmnr_ipv6_tcp_event_source;
  88
  89         /* dbus */
  90         sd_bus *bus;
  91         sd_event_source *bus_retry_event_source;
  92
  93         /* The hostname we publish on LLMNR and mDNS */
  94         char *llmnr_hostname;
  95         char *mdns_hostname;
  96         DnsResourceKey *llmnr_host_ipv4_key;
  97         DnsResourceKey *llmnr_host_ipv6_key;
  98
  99         /* Watch the system hostname */
 100         int hostname_fd;
 101         sd_event_source *hostname_event_source;
 102
 103         /* Watch for system suspends */
 104         sd_bus_slot *prepare_for_sleep_slot;
 105
 106         sd_event_source *sigusr1_event_source;
 107 };
 108
 109 /* Manager */
 110
 111 int manager_new(Manager **ret);
 112 Manager* manager_free(Manager *m);
 113
 114 int manager_start(Manager *m);
 115 int manager_read_resolv_conf(Manager *m);
 116 int manager_write_resolv_conf(Manager *m);
 117
 118 DnsServer *manager_set_dns_server(Manager *m, DnsServer *s);
 119 DnsServer *manager_find_dns_server(Manager *m, int family, const union in_addr_union *in_addr);
 120 DnsServer *manager_get_dns_server(Manager *m);
 121 void manager_next_dns_server(Manager *m);
 122
 123 uint32_t manager_find_mtu(Manager *m);
 124
 125 int manager_write(Manager *m, int fd, DnsPacket *p);
 126 int manager_send(Manager *m, int fd, int ifindex, int family, const union in_addr_union *addr, uint16_t port, DnsPacket *p);
 127 int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret);
 128
 129 int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr);
 130 LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr);
 131
 132 void manager_refresh_rrs(Manager *m);
 133 int manager_next_hostname(Manager *m);
 134
 135 bool manager_our_packet(Manager *m, DnsPacket *p);
 136 DnsScope* manager_find_scope(Manager *m, DnsPacket *p);
 137
 138 void manager_verify_all(Manager *m);
 139
 140 void manager_flush_dns_servers(Manager *m, DnsServerType t);
 141
 142 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 143
 144 #define EXTRA_CMSG_SPACE 1024
 145
 146 int manager_is_own_hostname(Manager *m, const char *name);
 147
 148 const char* support_to_string(Support p) _const_;
 149 int support_from_string(const char *s) _pure_;