tinc-vpn.org Git - tinc/blob - src/connection.c

   1 /*
   2     connection.c -- connection list management
   3     Copyright (C) 2000-2013 Guus Sliepen <guus@tinc-vpn.org>,
   4                   2000-2005 Ivo Timmermans
   5                   2008      Max Rijevski <maksuf@gmail.com>
   6
   7     This program is free software; you can redistribute it and/or modify
   8     it under the terms of the GNU General Public License as published by
   9     the Free Software Foundation; either version 2 of the License, or
  10     (at your option) any later version.
  11
  12     This program is distributed in the hope that it will be useful,
  13     but WITHOUT ANY WARRANTY; without even the implied warranty of
  14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15     GNU General Public License for more details.
  16
  17     You should have received a copy of the GNU General Public License along
  18     with this program; if not, write to the Free Software Foundation, Inc.,
  19     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20 */
  21
  22 #include "system.h"
  23
  24 #include "list.h"
  25 #include "cipher.h"
  26 #include "conf.h"
  27 #include "control_common.h"
  28 #include "list.h"
  29 #include "logger.h"
  30 #include "net.h"
  31 #include "rsa.h"
  32 #include "subnet.h"
  33 #include "utils.h"
  34 #include "xalloc.h"
  35
  36 list_t *connection_list;
  37 connection_t *everyone;
  38
  39 void init_connections(void) {
  40         connection_list = list_alloc((list_action_t) free_connection);
  41         everyone = new_connection();
  42         everyone->name = xstrdup("everyone");
  43         everyone->hostname = xstrdup("BROADCAST");
  44 }
  45
  46 void exit_connections(void) {
  47         list_delete_list(connection_list);
  48         connection_list = NULL;
  49
  50         free_connection(everyone);
  51         everyone = NULL;
  52 }
  53
  54 connection_t *new_connection(void) {
  55         return xzalloc(sizeof(connection_t));
  56 }
  57
  58 void free_connection(connection_t *c) {
  59         if(!c) {
  60                 return;
  61         }
  62
  63 #ifndef DISABLE_LEGACY
  64         cipher_close(c->incipher);
  65         digest_close(c->indigest);
  66         cipher_close(c->outcipher);
  67         digest_close(c->outdigest);
  68         rsa_free(c->rsa);
  69 #endif
  70
  71         sptps_stop(&c->sptps);
  72         ecdsa_free(c->ecdsa);
  73
  74         free(c->hischallenge);
  75         free(c->mychallenge);
  76
  77         buffer_clear(&c->inbuf);
  78         buffer_clear(&c->outbuf);
  79
  80         io_del(&c->io);
  81
  82         if(c->socket > 0) {
  83                 if(c->status.tarpit) {
  84                         tarpit(c->socket);
  85                 } else {
  86                         closesocket(c->socket);
  87                 }
  88         }
  89
  90         free(c->name);
  91         free(c->hostname);
  92
  93         if(c->config_tree) {
  94                 exit_configuration(&c->config_tree);
  95         }
  96
  97         free(c);
  98 }
  99
 100 void connection_add(connection_t *c) {
 101         list_insert_tail(connection_list, c);
 102 }
 103
 104 void connection_del(connection_t *c) {
 105         list_delete(connection_list, c);
 106 }
 107
 108 bool dump_connections(connection_t *cdump) {
 109         for list_each(connection_t, c, connection_list) {
 110                 send_request(cdump, "%d %d %s %s %x %d %x",
 111                              CONTROL, REQ_DUMP_CONNECTIONS,
 112                              c->name, c->hostname, c->options, c->socket,
 113                              bitfield_to_int(&c->status, sizeof(c->status)));
 114         }
 115
 116         return send_request(cdump, "%d %d", CONTROL, REQ_DUMP_CONNECTIONS);
 117 }