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

   1 /*
   2     connection.c -- connection list management
   3     Copyright (C) 2000-2009 Guus Sliepen <guus@tinc-vpn.org>,
   4                   2000-2005 Ivo Timmermans
   5
   6     This program is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     This program is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License along
  17     with this program; if not, write to the Free Software Foundation, Inc.,
  18     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 */
  20
  21 #include "system.h"
  22
  23 #include "avl_tree.h"
  24 #include "conf.h"
  25 #include "list.h"
  26 #include "logger.h"
  27 #include "net.h"                                /* Don't ask. */
  28 #include "netutl.h"
  29 #include "subnet.h"
  30 #include "utils.h"
  31 #include "xalloc.h"
  32
  33 avl_tree_t *connection_tree;    /* Meta connections */
  34 connection_t *broadcast;
  35
  36 static int connection_compare(const connection_t *a, const connection_t *b) {
  37         return a < b ? -1 : a == b ? 0 : 1;
  38 }
  39
  40 void init_connections(void) {
  41         connection_tree = avl_alloc_tree((avl_compare_t) connection_compare, (avl_action_t) free_connection);
  42         broadcast = new_connection();
  43         broadcast->name = xstrdup(_("everyone"));
  44         broadcast->hostname = xstrdup(_("BROADCAST"));
  45 }
  46
  47 void exit_connections(void) {
  48         avl_delete_tree(connection_tree);
  49         free_connection(broadcast);
  50 }
  51
  52 connection_t *new_connection(void) {
  53         connection_t *c;
  54
  55         c = xmalloc_and_zero(sizeof(connection_t));
  56
  57         if(!c)
  58                 return NULL;
  59
  60         gettimeofday(&c->start, NULL);
  61
  62         return c;
  63 }
  64
  65 void free_connection(connection_t *c) {
  66         if(c->name)
  67                 free(c->name);
  68
  69         if(c->hostname)
  70                 free(c->hostname);
  71
  72         if(c->inkey)
  73                 free(c->inkey);
  74
  75         if(c->outkey)
  76                 free(c->outkey);
  77
  78         if(c->inctx) {
  79                 EVP_CIPHER_CTX_cleanup(c->inctx);
  80                 free(c->inctx);
  81         }
  82
  83         if(c->outctx) {
  84                 EVP_CIPHER_CTX_cleanup(c->outctx);
  85                 free(c->outctx);
  86         }
  87
  88         if(c->mychallenge)
  89                 free(c->mychallenge);
  90
  91         if(c->hischallenge)
  92                 free(c->hischallenge);
  93
  94         if(c->config_tree)
  95                 exit_configuration(&c->config_tree);
  96
  97         if(c->outbuf)
  98                 free(c->outbuf);
  99
 100         if(c->rsa_key)
 101                 RSA_free(c->rsa_key);
 102
 103         free(c);
 104 }
 105
 106 void connection_add(connection_t *c) {
 107         avl_insert(connection_tree, c);
 108 }
 109
 110 void connection_del(connection_t *c) {
 111         avl_delete(connection_tree, c);
 112 }
 113
 114 void dump_connections(void) {
 115         avl_node_t *node;
 116         connection_t *c;
 117
 118         logger(LOG_DEBUG, _("Connections:"));
 119
 120         for(node = connection_tree->head; node; node = node->next) {
 121                 c = node->data;
 122                 logger(LOG_DEBUG, _(" %s at %s options %lx socket %d status %04x outbuf %d/%d/%d"),
 123                            c->name, c->hostname, c->options, c->socket, bitfield_to_int(&c->status, sizeof c->status),
 124                            c->outbufsize, c->outbufstart, c->outbuflen);
 125         }
 126
 127         logger(LOG_DEBUG, _("End of connections."));
 128 }
 129
 130 bool read_connection_config(connection_t *c) {
 131         char *fname;
 132         int x;
 133
 134         xasprintf(&fname, "%s/hosts/%s", confbase, c->name);
 135         x = read_config_file(c->config_tree, fname);
 136         free(fname);
 137
 138         return x == 0;
 139 }