git.meshlink.io Git - meshlink/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 "splay_tree.h"
  26 #include "cipher.h"
  27 #include "conf.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         cp();
  45
  46         connection_tree = splay_alloc_tree((splay_compare_t) connection_compare, (splay_action_t) free_connection);
  47         broadcast = new_connection();
  48         broadcast->name = xstrdup(_("everyone"));
  49         broadcast->hostname = xstrdup(_("BROADCAST"));
  50 }
  51
  52 void exit_connections(void) {
  53         cp();
  54
  55         splay_delete_tree(connection_tree);
  56         free_connection(broadcast);
  57 }
  58
  59 connection_t *new_connection(void) {
  60         cp();
  61
  62         return xmalloc_and_zero(sizeof(connection_t));
  63 }
  64
  65 void free_connection(connection_t *c) {
  66         cp();
  67
  68         if(!c)
  69                 return;
  70
  71         if(c->name)
  72                 free(c->name);
  73
  74         if(c->hostname)
  75                 free(c->hostname);
  76
  77         cipher_close(&c->incipher);
  78         cipher_close(&c->outcipher);
  79
  80         if(c->hischallenge)
  81                 free(c->hischallenge);
  82
  83         if(c->config_tree)
  84                 exit_configuration(&c->config_tree);
  85
  86         if(c->buffer)
  87                 bufferevent_free(c->buffer);
  88
  89         if(event_initialized(&c->inevent))
  90                 event_del(&c->inevent);
  91
  92         free(c);
  93 }
  94
  95 void connection_add(connection_t *c) {
  96         cp();
  97
  98         splay_insert(connection_tree, c);
  99 }
 100
 101 void connection_del(connection_t *c) {
 102         cp();
 103
 104         splay_delete(connection_tree, c);
 105 }
 106
 107 int dump_connections(struct evbuffer *out) {
 108         splay_node_t *node;
 109         connection_t *c;
 110
 111         cp();
 112
 113         for(node = connection_tree->head; node; node = node->next) {
 114                 c = node->data;
 115                 if(evbuffer_add_printf(out,
 116                                    _(" %s at %s options %lx socket %d status %04x\n"),
 117                                    c->name, c->hostname, c->options, c->socket,
 118                                    bitfield_to_int(&c->status, sizeof c->status)) == -1)
 119                         return errno;
 120         }
 121
 122         return 0;
 123 }
 124
 125 bool read_connection_config(connection_t *c) {
 126         char *fname;
 127         int x;
 128
 129         cp();
 130
 131         xasprintf(&fname, "%s/hosts/%s", confbase, c->name);
 132         x = read_config_file(c->config_tree, fname);
 133         free(fname);
 134
 135         return x == 0;
 136 }