git.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         .head = NULL,
  36         .tail = NULL,
  37         .count = 0,
  38         .delete = (list_action_t) free_connection,
  39 };
  40
  41 connection_t *everyone;
  42
  43 void init_connections(void) {
  44         everyone = new_connection();
  45         everyone->name = xstrdup("everyone");
  46         everyone->hostname = xstrdup("BROADCAST");
  47 }
  48
  49 void exit_connections(void) {
  50         list_empty_list(&connection_list);
  51
  52         free_connection(everyone);
  53         everyone = NULL;
  54 }
  55
  56 connection_t *new_connection(void) {
  57         return xzalloc(sizeof(connection_t));
  58 }
  59
  60 void free_connection(connection_t *c) {
  61         if(!c) {
  62                 return;
  63         }
  64
  65 #ifndef DISABLE_LEGACY
  66         cipher_close(c->incipher);
  67         digest_close(c->indigest);
  68         cipher_close(c->outcipher);
  69         digest_close(c->outdigest);
  70         rsa_free(c->rsa);
  71 #endif
  72
  73         sptps_stop(&c->sptps);
  74         ecdsa_free(c->ecdsa);
  75
  76         free(c->hischallenge);
  77         free(c->mychallenge);
  78
  79         buffer_clear(&c->inbuf);
  80         buffer_clear(&c->outbuf);
  81
  82         io_del(&c->io);
  83
  84         if(c->socket > 0) {
  85                 if(c->status.tarpit) {
  86                         tarpit(c->socket);
  87                 } else {
  88                         closesocket(c->socket);
  89                 }
  90         }
  91
  92         free(c->name);
  93         free(c->hostname);
  94
  95         if(c->config_tree) {
  96                 exit_configuration(&c->config_tree);
  97         }
  98
  99         free(c);
 100 }
 101
 102 void connection_add(connection_t *c) {
 103         list_insert_tail(&connection_list, c);
 104 }
 105
 106 void connection_del(connection_t *c) {
 107         list_delete(&connection_list, c);
 108 }
 109
 110 bool dump_connections(connection_t *cdump) {
 111         for list_each(connection_t, c, &connection_list) {
 112                 send_request(cdump, "%d %d %s %s %x %d %x",
 113                              CONTROL, REQ_DUMP_CONNECTIONS,
 114                              c->name, c->hostname, c->options, c->socket,
 115                              bitfield_to_int(&c->status, sizeof(c->status)));
 116         }
 117
 118         return send_request(cdump, "%d %d", CONTROL, REQ_DUMP_CONNECTIONS);
 119 }