1                 : /*
       2                 :  * init.c
       3                 :  * $Id: init.c 1831 2006-12-12 17:06:40Z remi $
       4                 :  */
       5                 : 
       6                 : /***********************************************************************
       7                 :  *  Copyright © 2005-2006 Rémi Denis-Courmont.                         *
       8                 :  *  This program is free software; you can redistribute and/or modify  *
       9                 :  *  it under the terms of the GNU General Public License as published  *
      10                 :  *  by the Free Software Foundation; version 2 of the license.         *
      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.               *
      15                 :  *  See the GNU General Public License for more details.               *
      16                 :  *                                                                     *
      17                 :  *  You should have received a copy of the GNU General Public License  *
      18                 :  *  along with this program; if not, you can get it from:              *
      19                 :  *  http://www.gnu.org/copyleft/gpl.html                               *
      20                 :  ***********************************************************************/
      21                 : 
      22                 : #ifdef HAVE_CONFIG_H
      23                 : # include <config.h>
      24                 : #endif
      25                 : 
      26                 : #include <stdbool.h>
      27                 : #include <gettext.h>
      28                 : 
      29                 : #include <assert.h>
      30                 : 
      31                 : #include <inttypes.h>
      32                 : #include "security.h"
      33                 : #include "tunnel.h"
      34                 : #include "clock.h"
      35                 : 
      36                 : /**
      37                 :  * Initializes libteredo. That function must be called before any other
      38                 :  * libteredo functions. It can safely be called multiple times and is
      39                 :  * thread-safe. If the process is to be chrooted(), it should be called
      40                 :  * before chroot().
      41                 :  *
      42                 :  * @param use_client true if libteredo is to be used in client-mode
      43                 :  *
      44                 :  * @return 0 on success, -1 on failure.
      45                 :  * -1 is also returned when use_client is true while libteredo was
      46                 :  *  compiled without client support.
      47                 :  */
      48                 : int teredo_startup (bool use_client)
      49               4 : {
      50                 :         (void)bindtextdomain (PACKAGE_NAME, LOCALEDIR);
      51                 : 
      52                 : #ifdef MIREDO_TEREDO_CLIENT
      53                 :         (void)use_client;
      54                 : #else
      55                 :         if (use_client)
      56                 :                 return -1;
      57                 : #endif
      58                 : 
      59               4 :         if (teredo_init_HMAC () == 0)
      60                 :         {
      61               4 :                 if (teredo_clock_create () == 0)
      62               4 :                         return 0;
      63               0 :                 teredo_deinit_HMAC ();
      64                 :         }
      65               0 :         return -1;
      66                 : }
      67                 : 
      68                 : 
      69                 : /**
      70                 :  * Releases resources allocated with teredo_startup().
      71                 :  * Should be called as many times as teredo_startup() was called.
      72                 :  * Thread-safe.
      73                 :  *
      74                 :  * @param use_client true if the matching teredo_preinit call
      75                 :  * had the use_client parameter set.
      76                 :  */
      77                 : void teredo_cleanup (bool use_client)
      78               4 : {
      79                 :         (void)use_client;
      80                 : #ifndef MIREDO_TEREDO_CLIENT
      81                 :         assert (!use_client);
      82                 : #endif
      83                 : 
      84               4 :         teredo_clock_destroy ();
      85               4 :         teredo_deinit_HMAC ();
      86               4 : }