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         return (void *)a - (void *)b;
  40 }
  41
  42 void init_connections(void) {
  43         cp();
  44
  45         connection_tree = avl_alloc_tree((avl_compare_t) connection_compare, (avl_action_t) free_connection);
  46         broadcast = new_connection();
  47         broadcast->name = xstrdup(_("everyone"));
  48         broadcast->hostname = xstrdup(_("BROADCAST"));
  49 }
  50
  51 void exit_connections(void) {
  52         cp();
  53
  54         avl_delete_tree(connection_tree);
  55         free_connection(broadcast);
  56 }
  57
  58 connection_t *new_connection(void) {
  59         connection_t *c;
  60
  61         cp();
  62
  63         c = xmalloc_and_zero(sizeof(connection_t));
  64
  65         if(!c)
  66                 return NULL;
  67
  68         gettimeofday(&c->start, NULL);
  69         event_set(&c->ev, -1, 0, NULL, NULL);
  70
  71         return c;
  72 }
  73
  74 void free_connection(connection_t *c) {
  75         cp();
  76
  77         if(!c)
  78                 return;
  79
  80         if(c->name)
  81                 free(c->name);
  82
  83         if(c->hostname)
  84                 free(c->hostname);
  85
  86         if(c->inkey)
  87                 free(c->inkey);
  88
  89         if(c->outkey)
  90                 free(c->outkey);
  91
  92         if(c->mychallenge)
  93                 free(c->mychallenge);
  94
  95         if(c->hischallenge)
  96                 free(c->hischallenge);
  97
  98         event_del(&c->ev);
  99         free(c);
 100 }
 101
 102 void connection_add(connection_t *c) {
 103         cp();
 104
 105         avl_insert(connection_tree, c);
 106 }
 107
 108 void connection_del(connection_t *c) {
 109         cp();
 110
 111         avl_delete(connection_tree, c);
 112 }
 113
 114 void dump_connections(void) {
 115         avl_node_t *node;
 116         connection_t *c;
 117
 118         cp();
 119
 120         logger(LOG_DEBUG, _("Connections:"));
 121
 122         for(node = connection_tree->head; node; node = node->next) {
 123                 c = node->data;
 124                 logger(LOG_DEBUG, _(" %s at %s options %lx socket %d status %04x outbuf %d/%d/%d"),
 125                            c->name, c->hostname, c->options, c->socket, c->status.value,
 126                            c->outbufsize, c->outbufstart, c->outbuflen);
 127         }
 128
 129         logger(LOG_DEBUG, _("End of connections."));
 130 }
 131
 132 bool read_connection_config(connection_t *c) {
 133         char *fname;
 134         int x;
 135
 136         cp();
 137
 138         asprintf(&fname, "%s/hosts/%s", confbase, c->name);
 139         x = read_config_file(c->config_tree, fname);
 140         free(fname);
 141
 142         return x == 0;
 143 }