release/src/router/openvpn/socks.h

   1 /*
   2  *  OpenVPN -- An application to securely tunnel IP networks
   3  *             over a single TCP/UDP port, with support for SSL/TLS-based
   4  *             session authentication and key exchange,
   5  *             packet encryption, packet authentication, and
   6  *             packet compression.
   7  *
   8  *  Copyright (C) 2002-2009 OpenVPN Technologies, Inc. <sales@openvpn.net>
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License version 2
  12  *  as published by the Free Software Foundation.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program (see the file COPYING included with this
  21  *  distribution); if not, write to the Free Software Foundation, Inc.,
  22  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  */
  24
  25 /*
  26  * 2004-01-30: Added Socks5 proxy support
  27  *   (Christof Meerwald, http://cmeerw.org)
  28  */
  29
  30 #ifndef SOCKS_H
  31 #define SOCKS_H
  32
  33 #ifdef ENABLE_SOCKS
  34
  35 #include "buffer.h"
  36
  37 struct openvpn_sockaddr;
  38 struct link_socket_actual;
  39
  40 struct socks_proxy_info {
  41   bool defined;
  42   bool retry;
  43
  44   char server[128];
  45   int port;
  46 };
  47
  48 void socks_adjust_frame_parameters (struct frame *frame, int proto);
  49
  50 struct socks_proxy_info *socks_proxy_new (const char *server,
  51                                           int port,
  52                                           bool retry,
  53                                           struct auto_proxy_info *auto_proxy_info);
  54
  55 void socks_proxy_close (struct socks_proxy_info *sp);
  56
  57 void establish_socks_proxy_passthru (struct socks_proxy_info *p,
  58                                      socket_descriptor_t sd, /* already open to proxy */
  59                                      const char *host,       /* openvpn server remote */
  60                                      const int port,         /* openvpn server port */
  61                                      volatile int *signal_received);
  62
  63 void establish_socks_proxy_udpassoc (struct socks_proxy_info *p,
  64                                      socket_descriptor_t ctrl_sd, /* already open to proxy */
  65                                      socket_descriptor_t udp_sd,
  66                                      struct openvpn_sockaddr *relay_addr,
  67                                      volatile int *signal_received);
  68
  69 void socks_process_incoming_udp (struct buffer *buf,
  70                                 struct link_socket_actual *from);
  71
  72 int socks_process_outgoing_udp (struct buffer *buf,
  73                                 const struct link_socket_actual *to);
  74
  75 #endif
  76 #endif