/**
 * xrdp: A Remote Desktop Protocol server.
 *
 * Copyright (C) Jay Sorg 2004-2013
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 *
 * @file config.h
 * @brief User authentication definitions
 * @author Simone Fedele @< simo [at] esseemme [dot] org @>
 *
 */

#ifndef CONFIG_H
#define CONFIG_H

#include "arch.h"
#include "list.h"
#include "log.h"

#define SESMAN_CFG_GLOBALS           "Globals"
#define SESMAN_CFG_DEFWM             "DefaultWindowManager"
#define SESMAN_CFG_ADDRESS           "ListenAddress"
#define SESMAN_CFG_PORT              "ListenPort"
#define SESMAN_CFG_ENABLE_USERWM     "EnableUserWindowManager"
#define SESMAN_CFG_USERWM            "UserWindowManager"
#define SESMAN_CFG_MAX_SESSION       "MaxSessions"
#define SESMAN_CFG_AUTH_FILE_PATH    "AuthFilePath"

#define SESMAN_CFG_RDP_PARAMS        "X11rdp"
#define SESMAN_CFG_XORG_PARAMS       "Xorg"
#define SESMAN_CFG_VNC_PARAMS        "Xvnc"

#define SESMAN_CFG_SESSION_VARIABLES "SessionVariables"

/*
#define SESMAN_CFG_LOGGING           "Logging"
#define SESMAN_CFG_LOG_FILE          "LogFile"
#define SESMAN_CFG_LOG_LEVEL         "LogLevel"
#define SESMAN_CFG_LOG_ENABLE_SYSLOG "EnableSyslog"
#define SESMAN_CFG_LOG_SYSLOG_LEVEL  "SyslogLevel"
*/
#define SESMAN_CFG_SECURITY          "Security"
#define SESMAN_CFG_SEC_LOGIN_RETRY   "MaxLoginRetry"
#define SESMAN_CFG_SEC_ALLOW_ROOT    "AllowRootLogin"
#define SESMAN_CFG_SEC_USR_GROUP     "TerminalServerUsers"
#define SESMAN_CFG_SEC_ADM_GROUP     "TerminalServerAdmins"
#define SESMAN_CFG_SEC_ALWAYSGROUPCHECK "AlwaysGroupCheck"

#define SESMAN_CFG_SESSIONS          "Sessions"
#define SESMAN_CFG_SESS_MAX          "MaxSessions"
#define SESMAN_CFG_SESS_KILL_DISC    "KillDisconnected"
#define SESMAN_CFG_SESS_IDLE_LIMIT   "IdleTimeLimit"
#define SESMAN_CFG_SESS_DISC_LIMIT   "DisconnectedTimeLimit"
#define SESMAN_CFG_SESS_X11DISPLAYOFFSET "X11DisplayOffset"

#define SESMAN_CFG_SESS_POLICY_S "Policy"
#define SESMAN_CFG_SESS_POLICY_DFLT_S "Default"
#define SESMAN_CFG_SESS_POLICY_UBD_S "UBD"
#define SESMAN_CFG_SESS_POLICY_UBI_S "UBI"
#define SESMAN_CFG_SESS_POLICY_UBC_S "UBC"
#define SESMAN_CFG_SESS_POLICY_UBDI_S "UBDI"
#define SESMAN_CFG_SESS_POLICY_UBDC_S "UBDC"

enum SESMAN_CFG_SESS_POLICY_BITS {
    SESMAN_CFG_SESS_POLICY_D = 0x01,
    SESMAN_CFG_SESS_POLICY_I = 0x02,
    SESMAN_CFG_SESS_POLICY_C = 0x04
};

enum SESMAN_CFG_SESS_POLICY {
    SESMAN_CFG_SESS_POLICY_DFLT = 0,
    SESMAN_CFG_SESS_POLICY_UBD = SESMAN_CFG_SESS_POLICY_D,
    SESMAN_CFG_SESS_POLICY_UBI = SESMAN_CFG_SESS_POLICY_I,
    SESMAN_CFG_SESS_POLICY_UBC = SESMAN_CFG_SESS_POLICY_C,
    SESMAN_CFG_SESS_POLICY_UBDI = SESMAN_CFG_SESS_POLICY_D | SESMAN_CFG_SESS_POLICY_I,
    SESMAN_CFG_SESS_POLICY_UBDC = SESMAN_CFG_SESS_POLICY_D | SESMAN_CFG_SESS_POLICY_C
};

/**
 *
 * @struct config_security
 * @brief struct that contains sesman access control configuration
 *
 */
struct config_security
{
  /**
   * @var allow_root
   * @brief allow root login on TS
   */
  int allow_root;
  /**
   * @var login_retry
   * @brief maximum login attempts
   */
  int login_retry;
  /**
   * @var ts_users
   * @brief Terminal Server Users group
   */
  int ts_users_enable;
  int ts_users;
  /**
   * @var ts_admins
   * @brief Terminal Server Administrators group
   */
  int ts_admins_enable;
  int ts_admins;
  /**
   * @var ts_always_group_check
   * @brief if the Groups are not found deny access
   */
  int ts_always_group_check;
};

/**
 *
 * @struct config_sessions
 * @brief struct that contains sesman session handling configuration
 *
 */
struct config_sessions
{
  /**
   * @var x11_display_offset
   * @brief X11 TCP port offset. default value: 10
   */
  int x11_display_offset;
  /**
   * @var max_sessions
   * @brief maximum number of allowed sessions. 0 for unlimited
   */
  int max_sessions;
  /**
   * @var max_idle_time
   * @brief maximum idle time for each session
   */
  int max_idle_time;
  /**
   * @var max_disc_time
   * @brief maximum disconnected time for each session
   */
  int max_disc_time;
  /**
   * @var kill_disconnected
   * @brief enables automatic killing of disconnected session
   */
  int kill_disconnected;
  /**
   * @var policy
   * @brief session allocation policy
   */
  enum SESMAN_CFG_SESS_POLICY policy;
};

/**
 *
 * @struct config_sesman
 * @brief struct that contains sesman configuration
 *
 * This struct contains all of sesman configuration parameters\n
 * Every parameter in [globals] is a member of this struct, other
 * sections options are embedded in this struct as member structures
 *
 */
struct config_sesman
{
  /**
   * @var listen_address
   * @brief Listening address
   */
  char listen_address[32];
  /**
   * @var listen_port
   * @brief Listening port
   */
  char listen_port[16];
  /**
   * @var enable_user_wm
   * @brief Flag that enables user specific wm
   */
  int enable_user_wm;
  /**
   * @var default_wm
   * @brief Default window manager
   */
  char default_wm[32];
  /**
   * @var user_wm
   * @brief Default window manager
   */
  char user_wm[32];
  /**
   * @var auth_file_path
   * @brief Auth file path
   */
  char* auth_file_path;
  /**
   * @var vnc_params
   * @brief Xvnc additional parameter list
   */
  struct list* vnc_params;
  /**
   * @var rdp_params
   * @brief X11rdp additional parameter list
   */
  struct list* rdp_params;
  /**
   * @var xorg_params
   * @brief Xorg additional parameter list
   */
  struct list* xorg_params;
  /**
   * @var log
   * @brief Log configuration struct
   */
  //struct log_config log;
  /**
   * @var sec
   * @brief Security configuration options struct
   */
  struct config_security sec;
  /**
   * @var sess
   * @brief Session configuration options struct
   */
  struct config_sessions sess;

  /**
   * @var env_names
   * @brief environment variable name list
   */
  struct list* env_names;
   /**
   * @var env_values
   * @brief environment variable value list
   */
  struct list* env_values;
};

/**
 *
 * @brief Reads sesman configuration
 * @param cfg pointer to configuration object to be replaced
 * @return 0 on success, 1 on failure
 *
 */
int
config_read(struct config_sesman* cfg);

/**
 *
 * @brief Reads sesman [global] configuration section
 * @param file configuration file descriptor
 * @param cf pointer to a config struct
 * @param param_n parameter name list
 * @param param_v parameter value list
 * @return 0 on success, 1 on failure
 *
 */
int
config_read_globals(int file, struct config_sesman* cf,
                    struct list* param_n, struct list* param_v);

/**
 *
 * @brief Reads sesman [logging] configuration section
 * @param file configuration file descriptor
 * @param lc pointer to a log_config struct
 * @param param_n parameter name list
 * @param param_v parameter value list
 * @return 0 on success, 1 on failure
 *
 */
int
config_read_logging(int file, struct log_config* lc, struct list* param_n,
                    struct list* param_v);

/**
 *
 * @brief Reads sesman [Security] configuration section
 * @param file configuration file descriptor
 * @param sc pointer to a config_security struct
 * @param param_n parameter name list
 * @param param_v parameter value list
 * @return 0 on success, 1 on failure
 *
 */
int
config_read_security(int file, struct config_security* sc,
                     struct list* param_n, struct list* param_v);

/**
 *
 * @brief Reads sesman [Sessions] configuration section
 * @param file configuration file descriptor
 * @param ss pointer to a config_sessions struct
 * @param param_n parameter name list
 * @param param_v parameter value list
 * @return 0 on success, 1 on failure
 *
 */
int
config_read_sessions(int file, struct config_sessions* ss,
                     struct list* param_n, struct list* param_v);

/**
 *
 * @brief Reads sesman [X11rdp] configuration section
 * @param file configuration file descriptor
 * @param cs pointer to a config_sesman struct
 * @param param_n parameter name list
 * @param param_v parameter value list
 * @return 0 on success, 1 on failure
 *
 */
int
config_read_rdp_params(int file, struct config_sesman* cs, struct list* param_n,
                       struct list* param_v);

/**
 *
 * @brief Reads sesman [XOrg] configuration section
 * @param file configuration file descriptor
 * @param cs pointer to a config_sesman struct
 * @param param_n parameter name list
 * @param param_v parameter value list
 * @return 0 on success, 1 on failure
 *
 */
int
config_read_xorg_params(int file, struct config_sesman* cs, struct list* param_n,
                        struct list* param_v);

/**
 *
 * @brief Reads sesman [Xvnc] configuration section
 * @param file configuration file descriptor
 * @param cs pointer to a config_sesman struct
 * @param param_n parameter name list
 * @param param_v parameter value list
 * @return 0 on success, 1 on failure
 *
 */
int
config_read_vnc_params(int file, struct config_sesman* cs, struct list* param_n,
                       struct list* param_v);

int
config_read_session_variables(int file, struct config_sesman *cs,
                              struct list *param_n, struct list *param_v);

void
config_free(struct config_sesman *cs);

#endif