/*
  *  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) 2002-2010 OpenVPN Technologies, 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 (see the file COPYING included with this
  *  distribution); if not, write to the Free Software Foundation, Inc.,
  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef PROXY_H
 #define PROXY_H
 
 #include "buffer.h"
 #include "misc.h"
 

 #ifdef GENERAL_PROXY_SUPPORT
 
 /*
  * Return value for get_proxy_settings to automatically
  * determine proxy information.
  */
 struct auto_proxy_info_entry {
   char *server;
   int port;
 };
 
 struct auto_proxy_info {
   struct auto_proxy_info_entry http;
   struct auto_proxy_info_entry socks;
 };
 
 struct auto_proxy_info *get_proxy_settings (char **err, struct gc_arena *gc);
 
 #ifdef WIN32
 void show_win_proxy_settings (const int msglevel);
 #endif /* WIN32 */
 
 #endif /* GENERAL_PROXY_SUPPORT */
 
 #ifdef ENABLE_HTTP_PROXY
 

 /* HTTP CONNECT authentication methods */

 #define HTTP_AUTH_NONE   0
 #define HTTP_AUTH_BASIC  1
 #define HTTP_AUTH_DIGEST 2
 #define HTTP_AUTH_NTLM   3
 #define HTTP_AUTH_NTLM2  4
 #define HTTP_AUTH_N      5 /* number of HTTP_AUTH methods */

 
 struct http_proxy_options {
   const char *server;
   int port;
   bool retry;
   int timeout;

 
 # define PAR_NO  0  /* don't support any auth retries */
 # define PAR_ALL 1  /* allow all proxy auth protocols */
 # define PAR_NCT 2  /* disable cleartext proxy auth protocols */

   int auth_retry;

   const char *auth_method_string;
   const char *auth_file;
   const char *http_version;
   const char *user_agent;
 };
 

 struct http_proxy_options_simple {
   const char *server;
   int port;
   int auth_retry;
 };
 

 struct http_proxy_info {
   bool defined;
   int auth_method;
   struct http_proxy_options options;
   struct user_pass up;

   char *proxy_authenticate;

   bool queried_creds;

 };
 

 struct http_proxy_info *http_proxy_new (const struct http_proxy_options *o,
 					struct auto_proxy_info *auto_proxy_info);
 
 void http_proxy_close (struct http_proxy_info *hp);

 bool establish_http_proxy_passthru (struct http_proxy_info *p,

 				    socket_descriptor_t sd, /* already open to proxy */
 				    const char *host,       /* openvpn server remote */
 				    const int port,         /* openvpn server port */
 				    struct buffer *lookahead,
 				    volatile int *signal_received);
 
 uint8_t *make_base64_string2 (const uint8_t *str, int str_len, struct gc_arena *gc);
 uint8_t *make_base64_string (const uint8_t *str, struct gc_arena *gc);
 

 #endif /* ENABLE_HTTP_PROXY */

 #endif /* PROXY_H */