www.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                   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 "avl_tree.h"
  25 #include "conf.h"
  26 #include "list.h"
  27 #include "logger.h"
  28 #include "net.h"                                /* Don't ask. */
  29 #include "netutl.h"
  30 #include "subnet.h"
  31 #include "utils.h"
  32 #include "xalloc.h"
  33
  34 avl_tree_t *connection_tree;    /* Meta connections */
  35 connection_t *broadcast;
  36
  37 static int connection_compare(const connection_t *a, const connection_t *b) {
  38         return a < b ? -1 : a == b ? 0 : 1;
  39 }
  40
  41 void init_connections(void) {
  42         connection_tree = avl_alloc_tree((avl_compare_t) connection_compare, (avl_action_t) free_connection);
  43         broadcast = new_connection();
  44         broadcast->name = xstrdup("everyone");
  45         broadcast->hostname = xstrdup("BROADCAST");
  46 }
  47
  48 void exit_connections(void) {
  49         avl_delete_tree(connection_tree);
  50         free_connection(broadcast);
  51 }
  52
  53 connection_t *new_connection(void) {
  54         connection_t *c;
  55
  56         c = xmalloc_and_zero(sizeof(connection_t));
  57
  58         if(!c)
  59                 return NULL;
  60
  61         gettimeofday(&c->start, NULL);
  62
  63         return c;
  64 }
  65
  66 void free_connection(connection_t *c) {
  67         if(c->name)
  68                 free(c->name);
  69
  70         if(c->hostname)
  71                 free(c->hostname);
  72
  73         if(c->inkey)
  74                 free(c->inkey);
  75
  76         if(c->outkey)
  77                 free(c->outkey);
  78
  79         if(c->inctx) {
  80                 EVP_CIPHER_CTX_cleanup(c->inctx);
  81                 free(c->inctx);
  82         }
  83
  84         if(c->outctx) {
  85                 EVP_CIPHER_CTX_cleanup(c->outctx);
  86                 free(c->outctx);
  87         }
  88
  89         if(c->mychallenge)
  90                 free(c->mychallenge);
  91
  92         if(c->hischallenge)
  93                 free(c->hischallenge);
  94
  95         if(c->config_tree)
  96                 exit_configuration(&c->config_tree);
  97
  98         if(c->outbuf)
  99                 free(c->outbuf);
 100
 101         if(c->rsa_key)
 102                 RSA_free(c->rsa_key);
 103
 104         free(c);
 105 }
 106
 107 void connection_add(connection_t *c) {
 108         avl_insert(connection_tree, c);
 109 }
 110
 111 void connection_del(connection_t *c) {
 112         avl_delete(connection_tree, c);
 113 }
 114
 115 void dump_connections(void) {
 116         avl_node_t *node;
 117         connection_t *c;
 118
 119         logger(LOG_DEBUG, "Connections:");
 120
 121         for(node = connection_tree->head; node; node = node->next) {
 122                 c = node->data;
 123                 logger(LOG_DEBUG, " %s at %s options %x socket %d status %04x outbuf %d/%d/%d",
 124                            c->name, c->hostname, c->options, c->socket, bitfield_to_int(&c->status, sizeof c->status),
 125                            c->outbufsize, c->outbufstart, c->outbuflen);
 126         }
 127
 128         logger(LOG_DEBUG, "End of connections.");
 129 }