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

   1 /*
   2     connection.c -- connection list management
   3     Copyright (C) 2000-2007 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
  17     along with this program; if not, write to the Free Software
  18     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19
  20     $Id$
  21 */
  22
  23 #include "system.h"
  24
  25 #include "avl_tree.h"
  26 #include "conf.h"
  27 #include "list.h"
  28 #include "logger.h"
  29 #include "net.h"                                /* Don't ask. */
  30 #include "netutl.h"
  31 #include "subnet.h"
  32 #include "utils.h"
  33 #include "xalloc.h"
  34
  35 avl_tree_t *connection_tree;    /* Meta connections */
  36 connection_t *broadcast;
  37
  38 static int connection_compare(const connection_t *a, const connection_t *b)
  39 {
  40         return (void *)a - (void *)b;
  41 }
  42
  43 void init_connections(void)
  44 {
  45         cp();
  46
  47         connection_tree = avl_alloc_tree((avl_compare_t) connection_compare, (avl_action_t) free_connection);
  48         broadcast = new_connection();
  49         broadcast->name = xstrdup(_("everyone"));
  50         broadcast->hostname = xstrdup(_("BROADCAST"));
  51 }
  52
  53 void exit_connections(void)
  54 {
  55         cp();
  56
  57         avl_delete_tree(connection_tree);
  58         free_connection(broadcast);
  59 }
  60
  61 connection_t *new_connection(void)
  62 {
  63         connection_t *c;
  64
  65         cp();
  66
  67         c = xmalloc_and_zero(sizeof(connection_t));
  68
  69         if(!c)
  70                 return NULL;
  71
  72         gettimeofday(&c->start, NULL);
  73
  74         return c;
  75 }
  76
  77 void free_connection(connection_t *c)
  78 {
  79         cp();
  80
  81         if(c->name)
  82                 free(c->name);
  83
  84         if(c->hostname)
  85                 free(c->hostname);
  86
  87         if(c->inkey)
  88                 free(c->inkey);
  89
  90         if(c->outkey)
  91                 free(c->outkey);
  92
  93         if(c->inctx) {
  94                 EVP_CIPHER_CTX_cleanup(c->inctx);
  95                 free(c->inctx);
  96         }
  97
  98         if(c->outctx) {
  99                 EVP_CIPHER_CTX_cleanup(c->outctx);
 100                 free(c->outctx);
 101         }
 102
 103         if(c->mychallenge)
 104                 free(c->mychallenge);
 105
 106         if(c->hischallenge)
 107                 free(c->hischallenge);
 108
 109         if(c->config_tree)
 110                 exit_configuration(&c->config_tree);
 111
 112         if(c->outbuf)
 113                 free(c->outbuf);
 114
 115         if(c->rsa_key)
 116                 RSA_free(c->rsa_key);
 117
 118         free(c);
 119 }
 120
 121 void connection_add(connection_t *c)
 122 {
 123         cp();
 124
 125         avl_insert(connection_tree, c);
 126 }
 127
 128 void connection_del(connection_t *c)
 129 {
 130         cp();
 131
 132         avl_delete(connection_tree, c);
 133 }
 134
 135 void dump_connections(void)
 136 {
 137         avl_node_t *node;
 138         connection_t *c;
 139
 140         cp();
 141
 142         logger(LOG_DEBUG, _("Connections:"));
 143
 144         for(node = connection_tree->head; node; node = node->next) {
 145                 c = node->data;
 146                 logger(LOG_DEBUG, _(" %s at %s options %lx socket %d status %04x outbuf %d/%d/%d"),
 147                            c->name, c->hostname, c->options, c->socket, c->status.value,
 148                            c->outbufsize, c->outbufstart, c->outbuflen);
 149         }
 150
 151         logger(LOG_DEBUG, _("End of connections."));
 152 }
 153
 154 bool read_connection_config(connection_t *c)
 155 {
 156         char *fname;
 157         int x;
 158
 159         cp();
 160
 161         asprintf(&fname, "%s/hosts/%s", confbase, c->name);
 162         x = read_config_file(c->config_tree, fname);
 163         free(fname);
 164
 165         return x == 0;
 166 }