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 *hostname;
  95         DnsResourceKey *host_ipv4_key;
  96         DnsResourceKey *host_ipv6_key;
  97
  98         /* Watch the system hostname */
  99         int hostname_fd;
 100         sd_event_source *hostname_event_source;
 101
 102         /* Watch for system suspends */
 103         sd_bus_slot *prepare_for_sleep_slot;
 104 };
 105
 106 /* Manager */
 107
 108 int manager_new(Manager **ret);
 109 Manager* manager_free(Manager *m);
 110
 111 int manager_start(Manager *m);
 112 int manager_read_resolv_conf(Manager *m);
 113 int manager_write_resolv_conf(Manager *m);
 114
 115 DnsServer *manager_set_dns_server(Manager *m, DnsServer *s);
 116 DnsServer *manager_find_dns_server(Manager *m, int family, const union in_addr_union *in_addr);
 117 DnsServer *manager_get_dns_server(Manager *m);
 118 void manager_next_dns_server(Manager *m);
 119
 120 uint32_t manager_find_mtu(Manager *m);
 121
 122 int manager_write(Manager *m, int fd, DnsPacket *p);
 123 int manager_send(Manager *m, int fd, int ifindex, int family, const union in_addr_union *addr, uint16_t port, DnsPacket *p);
 124 int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret);
 125
 126 int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr);
 127 LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr);
 128
 129 void manager_refresh_rrs(Manager *m);
 130 int manager_next_hostname(Manager *m);
 131
 132 bool manager_our_packet(Manager *m, DnsPacket *p);
 133 DnsScope* manager_find_scope(Manager *m, DnsPacket *p);
 134
 135 void manager_verify_all(Manager *m);
 136
 137 void manager_flush_dns_servers(Manager *m, DnsServerType t);
 138
 139 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 140
 141 #define EXTRA_CMSG_SPACE 1024
 142
 143 const char* support_to_string(Support p) _const_;
 144 int support_from_string(const char *s) _pure_;