/*
  *  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.

  */
 
 #ifndef PROXY_H
 #define PROXY_H
 
 #include "buffer.h"
 #include "misc.h"
 
 /* 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_custom_header {

     const char *name;
     const char *content;

 };
 
 #define MAX_CUSTOM_HTTP_HEADER 10

 struct http_proxy_options {

     const char *server;
     const char *port;
 
 #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_custom_header custom_headers[MAX_CUSTOM_HTTP_HEADER];
     bool inline_creds;

 };
 

 struct http_proxy_options_simple {

     const char *server;
     const char *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_options *init_http_proxy_options_once(struct http_proxy_options **hpo,
                                                         struct gc_arena *gc);
 
 struct http_proxy_info *http_proxy_new(const struct http_proxy_options *o);

 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 char *port,          /* openvpn server port */
                                    struct event_timeout *server_poll_timeout,
                                    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 /* PROXY_H */