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
  17     along with this program; if not, write to the Free Software
  18     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, 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 {
  38         return a < b ? -1 : a == b ? 0 : 1;
  39 }
  40
  41 void init_connections(void)
  42 {
  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 {
  53         cp();
  54
  55         avl_delete_tree(connection_tree);
  56         free_connection(broadcast);
  57 }
  58
  59 connection_t *new_connection(void)
  60 {
  61         connection_t *c;
  62
  63         cp();
  64
  65         c = xmalloc_and_zero(sizeof(connection_t));
  66
  67         if(!c)
  68                 return NULL;
  69
  70         gettimeofday(&c->start, NULL);
  71
  72         return c;
  73 }
  74
  75 void free_connection(connection_t *c)
  76 {
  77         cp();
  78
  79         if(c->name)
  80                 free(c->name);
  81
  82         if(c->hostname)
  83                 free(c->hostname);
  84
  85         if(c->inkey)
  86                 free(c->inkey);
  87
  88         if(c->outkey)
  89                 free(c->outkey);
  90
  91         if(c->inctx) {
  92                 EVP_CIPHER_CTX_cleanup(c->inctx);
  93                 free(c->inctx);
  94         }
  95
  96         if(c->outctx) {
  97                 EVP_CIPHER_CTX_cleanup(c->outctx);
  98                 free(c->outctx);
  99         }
 100
 101         if(c->mychallenge)
 102                 free(c->mychallenge);
 103
 104         if(c->hischallenge)
 105                 free(c->hischallenge);
 106
 107         if(c->config_tree)
 108                 exit_configuration(&c->config_tree);
 109
 110         if(c->outbuf)
 111                 free(c->outbuf);
 112
 113         if(c->rsa_key)
 114                 RSA_free(c->rsa_key);
 115
 116         free(c);
 117 }
 118
 119 void connection_add(connection_t *c)
 120 {
 121         cp();
 122
 123         avl_insert(connection_tree, c);
 124 }
 125
 126 void connection_del(connection_t *c)
 127 {
 128         cp();
 129
 130         avl_delete(connection_tree, c);
 131 }
 132
 133 void dump_connections(void)
 134 {
 135         avl_node_t *node;
 136         connection_t *c;
 137
 138         cp();
 139
 140         logger(LOG_DEBUG, _("Connections:"));
 141
 142         for(node = connection_tree->head; node; node = node->next) {
 143                 c = node->data;
 144                 logger(LOG_DEBUG, _(" %s at %s options %lx socket %d status %04x outbuf %d/%d/%d"),
 145                            c->name, c->hostname, c->options, c->socket, bitfield_to_int(&c->status, sizeof c->status),
 146                            c->outbufsize, c->outbufstart, c->outbuflen);
 147         }
 148
 149         logger(LOG_DEBUG, _("End of connections."));
 150 }
 151
 152 bool read_connection_config(connection_t *c)
 153 {
 154         char *fname;
 155         int x;
 156
 157         cp();
 158
 159         xasprintf(&fname, "%s/hosts/%s", confbase, c->name);
 160         x = read_config_file(c->config_tree, fname);
 161         free(fname);
 162
 163         return x == 0;
 164 }