/*
  *  OpenVPN -- An application to securely tunnel IP networks
  *             over a single TCP/UDP port, with support for SSL/TLS-based
  *             session authentication and key exchange,
  *             packet encryption, packet authentication, and
  *             packet compression.
  *

  *  Copyright (C) 2002-2018 OpenVPN Inc <sales@openvpn.net>

  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License version 2
  *  as published by the Free Software Foundation.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *

  *  You should have received a copy of the GNU General Public License along
  *  with this program; if not, write to the Free Software Foundation, Inc.,
  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

  */
 
 /*
  * 2004-01-30: Added Socks5 proxy support
  *   (Christof Meerwald, http://cmeerw.org)
  */
 
 #ifndef SOCKS_H
 #define SOCKS_H
 
 #include "buffer.h"
 

 struct openvpn_sockaddr;
 struct link_socket_actual;
 

 struct socks_proxy_info {

     bool defined;

     char server[128];
     const char *port;
     char authfile[256];

 };
 

 void socks_adjust_frame_parameters(struct frame *frame, int proto);

 struct socks_proxy_info *socks_proxy_new(const char *server,
                                          const char *port,
                                          const char *authfile);

 void socks_proxy_close(struct socks_proxy_info *sp);

 void establish_socks_proxy_passthru(struct socks_proxy_info *p,
                                     socket_descriptor_t sd,  /* already open to proxy */
                                     const char *host,        /* openvpn server remote */
                                     const char *servname,          /* openvpn server port */
                                     volatile int *signal_received);

 void establish_socks_proxy_udpassoc(struct socks_proxy_info *p,
                                     socket_descriptor_t ctrl_sd,  /* already open to proxy */
                                     socket_descriptor_t udp_sd,
                                     struct openvpn_sockaddr *relay_addr,
                                     volatile int *signal_received);

 void socks_process_incoming_udp(struct buffer *buf,
                                 struct link_socket_actual *from);

 int socks_process_outgoing_udp(struct buffer *buf,
                                const struct link_socket_actual *to);

 #endif /* ifndef SOCKS_H */