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