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 "logger.h"
  29 #include "net.h"
  30 #include "rsa.h"
  31 #include "utils.h"
  32 #include "xalloc.h"
  33
  34 list_t *connection_list;
  35 connection_t *everyone;
  36
  37 void init_connections(void) {
  38         connection_list = list_alloc((list_action_t) free_connection);
  39         everyone = new_connection();
  40         everyone->name = xstrdup("everyone");
  41         everyone->hostname = xstrdup("BROADCAST");
  42 }
  43
  44 void exit_connections(void) {
  45         list_delete_list(connection_list);
  46         connection_list = NULL;
  47
  48         free_connection(everyone);
  49         everyone = NULL;
  50 }
  51
  52 connection_t *new_connection(void) {
  53         return xzalloc(sizeof(connection_t));
  54 }
  55
  56 void free_connection(connection_t *c) {
  57         if(!c) {
  58                 return;
  59         }
  60
  61 #ifndef DISABLE_LEGACY
  62         cipher_close(c->incipher);
  63         digest_close(c->indigest);
  64         cipher_close(c->outcipher);
  65         digest_close(c->outdigest);
  66         rsa_free(c->rsa);
  67 #endif
  68
  69         sptps_stop(&c->sptps);
  70         ecdsa_free(c->ecdsa);
  71
  72         free(c->hischallenge);
  73         free(c->mychallenge);
  74
  75         buffer_clear(&c->inbuf);
  76         buffer_clear(&c->outbuf);
  77
  78         io_del(&c->io);
  79
  80         if(c->socket > 0) {
  81                 if(c->status.tarpit) {
  82                         tarpit(c->socket);
  83                 } else {
  84                         closesocket(c->socket);
  85                 }
  86         }
  87
  88         free(c->name);
  89         free(c->hostname);
  90
  91         if(c->config_tree) {
  92                 exit_configuration(&c->config_tree);
  93         }
  94
  95         free(c);
  96 }
  97
  98 void connection_add(connection_t *c) {
  99         list_insert_tail(connection_list, c);
 100 }
 101
 102 void connection_del(connection_t *c) {
 103         list_delete(connection_list, c);
 104 }
 105
 106 bool dump_connections(connection_t *cdump) {
 107         for list_each(connection_t, c, connection_list) {
 108                 send_request(cdump, "%d %d %s %s %x %d %x",
 109                              CONTROL, REQ_DUMP_CONNECTIONS,
 110                              c->name, c->hostname, c->options, c->socket,
 111                              bitfield_to_int(&c->status, sizeof(c->status)));
 112         }
 113
 114         return send_request(cdump, "%d %d", CONTROL, REQ_DUMP_CONNECTIONS);
 115 }