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         int dns_ipv4_fd;
  69         int dns_ipv6_fd;
  70
  71         sd_event_source *dns_ipv4_event_source;
  72         sd_event_source *dns_ipv6_event_source;
  73
  74         LIST_HEAD(DnsServer, dns_servers);
  75         LIST_HEAD(DnsServer, fallback_dns_servers);
  76         DnsServer *current_dns_server;
  77
  78         bool read_resolv_conf;
  79         usec_t resolv_conf_mtime;
  80
  81         LIST_HEAD(DnsScope, dns_scopes);
  82         DnsScope *unicast_scope;
  83
  84         /* LLMNR */
  85         int llmnr_ipv4_udp_fd;
  86         int llmnr_ipv6_udp_fd;
  87         int llmnr_ipv4_tcp_fd;
  88         int llmnr_ipv6_tcp_fd;
  89
  90         sd_event_source *llmnr_ipv4_udp_event_source;
  91         sd_event_source *llmnr_ipv6_udp_event_source;
  92         sd_event_source *llmnr_ipv4_tcp_event_source;
  93         sd_event_source *llmnr_ipv6_tcp_event_source;
  94
  95         /* dbus */
  96         sd_bus *bus;
  97         sd_event_source *bus_retry_event_source;
  98
  99         /* The hostname we publish on LLMNR and mDNS */
 100         char *hostname;
 101         DnsResourceKey *host_ipv4_key;
 102         DnsResourceKey *host_ipv6_key;
 103
 104         /* Watch the system hostname */
 105         int hostname_fd;
 106         sd_event_source *hostname_event_source;
 107
 108         /* Watch for system suspends */
 109         sd_bus_slot *prepare_for_sleep_slot;
 110 };
 111
 112 /* Manager */
 113
 114 int manager_new(Manager **ret);
 115 Manager* manager_free(Manager *m);
 116
 117 int manager_start(Manager *m);
 118 int manager_read_resolv_conf(Manager *m);
 119 int manager_write_resolv_conf(Manager *m);
 120
 121 DnsServer *manager_set_dns_server(Manager *m, DnsServer *s);
 122 DnsServer *manager_find_dns_server(Manager *m, int family, const union in_addr_union *in_addr);
 123 DnsServer *manager_get_dns_server(Manager *m);
 124 void manager_next_dns_server(Manager *m);
 125
 126 uint32_t manager_find_mtu(Manager *m);
 127
 128 int manager_send(Manager *m, int fd, int ifindex, int family, const union in_addr_union *addr, uint16_t port, DnsPacket *p);
 129 int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret);
 130
 131 int manager_dns_ipv4_fd(Manager *m);
 132 int manager_dns_ipv6_fd(Manager *m);
 133
 134 int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr);
 135 LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr);
 136
 137 void manager_refresh_rrs(Manager *m);
 138 int manager_next_hostname(Manager *m);
 139
 140 bool manager_our_packet(Manager *m, DnsPacket *p);
 141 DnsScope* manager_find_scope(Manager *m, DnsPacket *p);
 142
 143 void manager_verify_all(Manager *m);
 144
 145 void manager_flush_dns_servers(Manager *m, DnsServerType t);
 146
 147 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 148
 149 #define EXTRA_CMSG_SPACE 1024
 150
 151 const char* support_to_string(Support p) _const_;
 152 int support_from_string(const char *s) _pure_;