git.meshlink.io Git - meshlink/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 "splay_tree.h"
  25 #include "cipher.h"
  26 #include "conf.h"
  27 #include "control_common.h"
  28 #include "list.h"
  29 #include "logger.h"
  30 #include "net.h"                                /* Don't ask. */
  31 #include "netutl.h"
  32 #include "subnet.h"
  33 #include "utils.h"
  34 #include "xalloc.h"
  35
  36 splay_tree_t *connection_tree;  /* Meta connections */
  37 connection_t *broadcast;
  38
  39 static int connection_compare(const connection_t *a, const connection_t *b) {
  40         return a < b ? -1 : a == b ? 0 : 1;
  41 }
  42
  43 void init_connections(void) {
  44         connection_tree = splay_alloc_tree((splay_compare_t) connection_compare, (splay_action_t) free_connection);
  45         broadcast = new_connection();
  46         broadcast->name = xstrdup("everyone");
  47         broadcast->hostname = xstrdup("BROADCAST");
  48 }
  49
  50 void exit_connections(void) {
  51         splay_delete_tree(connection_tree);
  52         free_connection(broadcast);
  53 }
  54
  55 connection_t *new_connection(void) {
  56         return xmalloc_and_zero(sizeof(connection_t));
  57 }
  58
  59 void free_connection(connection_t *c) {
  60         if(!c)
  61                 return;
  62
  63         if(c->name)
  64                 free(c->name);
  65
  66         if(c->hostname)
  67                 free(c->hostname);
  68
  69         cipher_close(&c->incipher);
  70         cipher_close(&c->outcipher);
  71
  72         if(c->hischallenge)
  73                 free(c->hischallenge);
  74
  75         if(c->config_tree)
  76                 exit_configuration(&c->config_tree);
  77
  78         if(c->buffer)
  79                 bufferevent_free(c->buffer);
  80
  81         if(event_initialized(&c->inevent))
  82                 event_del(&c->inevent);
  83
  84         free(c);
  85 }
  86
  87 void connection_add(connection_t *c) {
  88         splay_insert(connection_tree, c);
  89 }
  90
  91 void connection_del(connection_t *c) {
  92         splay_delete(connection_tree, c);
  93 }
  94
  95 bool dump_connections(connection_t *cdump) {
  96         splay_node_t *node;
  97         connection_t *c;
  98
  99         for(node = connection_tree->head; node; node = node->next) {
 100                 c = node->data;
 101                 send_request(cdump, "%d %d %s at %s options %x socket %d status %04x",
 102                                 CONTROL, REQ_DUMP_CONNECTIONS,
 103                                 c->name, c->hostname, c->options, c->socket,
 104                                 bitfield_to_int(&c->status, sizeof c->status));
 105         }
 106
 107         return send_request(cdump, "%d %d", CONTROL, REQ_DUMP_CONNECTIONS);
 108 }