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 "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 splay_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 = splay_alloc_tree((splay_compare_t) connection_compare, (splay_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         splay_delete_tree(connection_tree);
  55         free_connection(broadcast);
  56 }
  57
  58 connection_t *new_connection(void) {
  59         cp();
  60
  61         return xmalloc_and_zero(sizeof(connection_t));
  62 }
  63
  64 void free_connection(connection_t *c) {
  65         cp();
  66
  67         if(!c)
  68                 return;
  69
  70         if(c->name)
  71                 free(c->name);
  72
  73         if(c->hostname)
  74                 free(c->hostname);
  75
  76         if(c->inkey)
  77                 free(c->inkey);
  78
  79         if(c->outkey)
  80                 free(c->outkey);
  81
  82         if(c->mychallenge)
  83                 free(c->mychallenge);
  84
  85         if(c->hischallenge)
  86                 free(c->hischallenge);
  87
  88         if(c->buffer)
  89                 bufferevent_free(c->buffer);
  90
  91         if(event_initialized(&c->inevent))
  92                 event_del(&c->inevent);
  93
  94         free(c);
  95 }
  96
  97 void connection_add(connection_t *c) {
  98         cp();
  99
 100         splay_insert(connection_tree, c);
 101 }
 102
 103 void connection_del(connection_t *c) {
 104         cp();
 105
 106         splay_delete(connection_tree, c);
 107 }
 108
 109 int dump_connections(struct evbuffer *out) {
 110         splay_node_t *node;
 111         connection_t *c;
 112
 113         cp();
 114
 115         for(node = connection_tree->head; node; node = node->next) {
 116                 c = node->data;
 117                 if(evbuffer_add_printf(out,
 118                                                            _(" %s at %s options %lx socket %d status %04x\n"),
 119                                                            c->name, c->hostname, c->options, c->socket,
 120                                                            c->status.value) == -1)
 121                         return errno;
 122         }
 123
 124         return 0;
 125 }
 126
 127 bool read_connection_config(connection_t *c) {
 128         char *fname;
 129         int x;
 130
 131         cp();
 132
 133         asprintf(&fname, "%s/hosts/%s", confbase, c->name);
 134         x = read_config_file(c->config_tree, fname);
 135         free(fname);
 136
 137         return x == 0;
 138 }