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-rtnl.h"
  27 #include "util.h"
  28 #include "list.h"
  29 #include "in-addr-util.h"
  30 #include "hashmap.h"
  31
  32 typedef struct Manager Manager;
  33
  34 #include "resolved-dns-query.h"
  35 #include "resolved-dns-server.h"
  36 #include "resolved-dns-scope.h"
  37 #include "resolved-dns-stream.h"
  38 #include "resolved-link.h"
  39
  40 typedef enum Support {
  41         SUPPORT_NO,
  42         SUPPORT_YES,
  43         SUPPORT_RESOLVE,
  44         _SUPPORT_MAX,
  45         _SUPPORT_INVALID = -1
  46 } Support;
  47
  48 struct Manager {
  49         sd_event *event;
  50
  51         Support llmnr_support;
  52
  53         /* Network */
  54         Hashmap *links;
  55
  56         sd_rtnl *rtnl;
  57         sd_event_source *rtnl_event_source;
  58
  59         sd_network_monitor *network_monitor;
  60         sd_event_source *network_event_source;
  61
  62         /* DNS query management */
  63         Hashmap *dns_transactions;
  64         LIST_HEAD(DnsQuery, dns_queries);
  65         unsigned n_dns_queries;
  66
  67         LIST_HEAD(DnsStream, dns_streams);
  68         unsigned n_dns_streams;
  69
  70         /* Unicast dns */
  71         int dns_ipv4_fd;
  72         int dns_ipv6_fd;
  73
  74         sd_event_source *dns_ipv4_event_source;
  75         sd_event_source *dns_ipv6_event_source;
  76
  77         LIST_HEAD(DnsServer, dns_servers);
  78         LIST_HEAD(DnsServer, fallback_dns_servers);
  79         DnsServer *current_dns_server;
  80
  81         bool read_resolv_conf;
  82         usec_t resolv_conf_mtime;
  83
  84         LIST_HEAD(DnsScope, dns_scopes);
  85         DnsScope *unicast_scope;
  86
  87         /* LLMNR */
  88         int llmnr_ipv4_udp_fd;
  89         int llmnr_ipv6_udp_fd;
  90         int llmnr_ipv4_tcp_fd;
  91         int llmnr_ipv6_tcp_fd;
  92
  93         sd_event_source *llmnr_ipv4_udp_event_source;
  94         sd_event_source *llmnr_ipv6_udp_event_source;
  95         sd_event_source *llmnr_ipv4_tcp_event_source;
  96         sd_event_source *llmnr_ipv6_tcp_event_source;
  97
  98         /* dbus */
  99         sd_bus *bus;
 100         sd_event_source *bus_retry_event_source;
 101
 102         /* The hostname we publish on LLMNR and mDNS */
 103         char *hostname;
 104         DnsResourceKey *host_ipv4_key;
 105         DnsResourceKey *host_ipv6_key;
 106
 107         /* Watch the system hostname */
 108         int hostname_fd;
 109         sd_event_source *hostname_event_source;
 110 };
 111
 112 /* Manager */
 113
 114 int manager_new(Manager **ret);
 115 Manager* manager_free(Manager *m);
 116
 117 int manager_read_resolv_conf(Manager *m);
 118 int manager_write_resolv_conf(Manager *m);
 119
 120 bool manager_known_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_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_dns_ipv4_fd(Manager *m);
 130 int manager_dns_ipv6_fd(Manager *m);
 131 int manager_llmnr_ipv4_udp_fd(Manager *m);
 132 int manager_llmnr_ipv6_udp_fd(Manager *m);
 133 int manager_llmnr_ipv4_tcp_fd(Manager *m);
 134 int manager_llmnr_ipv6_tcp_fd(Manager *m);
 135
 136 int manager_ifindex_is_loopback(Manager *m, int ifindex);
 137 int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr);
 138 LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr);
 139
 140 void manager_refresh_rrs(Manager *m);
 141 int manager_next_hostname(Manager *m);
 142
 143 int manager_our_packet(Manager *m, DnsPacket *p);
 144
 145 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 146
 147 #define EXTRA_CMSG_SPACE 1024
 148
 149 const char* support_to_string(Support p) _const_;
 150 int support_from_string(const char *s) _pure_;