/**

 * FreeRDP: A Remote Desktop Protocol Implementation

 * Time Zone Redirection

 *

 * Copyright 2012 Marc-Andre Moreau <marcandre.moreau@gmail.com>

 *

 * 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.

 */

#include <freerdp/config.h>

#include <winpr/crt.h>

#include <winpr/assert.h>

#include <winpr/timezone.h>

#include "settings.h"

#include "timezone.h"

#include <freerdp/log.h>

#define TAG FREERDP_TAG("core.timezone")

static BOOL rdp_read_system_time(wStream* s, SYSTEMTIME* system_time);

static BOOL rdp_write_system_time(wStream* s, const SYSTEMTIME* system_time);

/**

 * Read SYSTEM_TIME structure (TS_SYSTEMTIME).

 * msdn{cc240478}

 * @param s stream

 * @param system_time system time structure

 */

BOOL rdp_read_system_time(wStream* s, SYSTEMTIME* system_time)

{

  WINPR_ASSERT(system_time);

  if (!Stream_CheckAndLogRequiredLength(TAG, s, 16ull))

    return FALSE;

  Stream_Read_UINT16(s, system_time->wYear);         /* wYear, must be set to 0 */

  Stream_Read_UINT16(s, system_time->wMonth);        /* wMonth */

  Stream_Read_UINT16(s, system_time->wDayOfWeek);    /* wDayOfWeek */

  Stream_Read_UINT16(s, system_time->wDay);          /* wDay */

  Stream_Read_UINT16(s, system_time->wHour);         /* wHour */

  Stream_Read_UINT16(s, system_time->wMinute);       /* wMinute */

  Stream_Read_UINT16(s, system_time->wSecond);       /* wSecond */

  Stream_Read_UINT16(s, system_time->wMilliseconds); /* wMilliseconds */

  return TRUE;

}

/**

 * Write SYSTEM_TIME structure (TS_SYSTEMTIME).

 * msdn{cc240478}

 * @param s stream

 * @param system_time system time structure

 */

BOOL rdp_write_system_time(wStream* s, const SYSTEMTIME* system_time)

{

  WINPR_ASSERT(system_time);

  if (!Stream_EnsureRemainingCapacity(s, 16ull))

    return FALSE;

  Stream_Write_UINT16(s, system_time->wYear);         /* wYear, must be set to 0 */

  Stream_Write_UINT16(s, system_time->wMonth);        /* wMonth */

  Stream_Write_UINT16(s, system_time->wDayOfWeek);    /* wDayOfWeek */

  Stream_Write_UINT16(s, system_time->wDay);          /* wDay */

  Stream_Write_UINT16(s, system_time->wHour);         /* wHour */

  Stream_Write_UINT16(s, system_time->wMinute);       /* wMinute */

  Stream_Write_UINT16(s, system_time->wSecond);       /* wSecond */

  Stream_Write_UINT16(s, system_time->wMilliseconds); /* wMilliseconds */

  DEBUG_TIMEZONE("Time: y=%" PRIu16 ",m=%" PRIu16 ",dow=%" PRIu16 ",d=%" PRIu16 ", %02" PRIu16

                 ":%02" PRIu16 ":%02" PRIu16 ".%03" PRIu16 "",

                 system_time->wYear, system_time->wMonth, system_time->wDayOfWeek,

                 system_time->wDay, system_time->wHour, system_time->wMinute,

                 system_time->wSecond, system_time->wMilliseconds);

  return TRUE;

}

/**

 * Read client time zone information (TS_TIME_ZONE_INFORMATION).

 * msdn{cc240477}

 * @param s stream

 * @param settings settings

 *

 * @return \b TRUE for success, \b FALSE otherwise

 */

BOOL rdp_read_client_time_zone(wStream* s, rdpSettings* settings)

{

  LPTIME_ZONE_INFORMATION tz = { 0 };

  if (!s || !settings)

    return FALSE;

  if (!Stream_CheckAndLogRequiredLength(TAG, s, 172))

    return FALSE;

  tz = settings->ClientTimeZone;

  if (!tz)

    return FALSE;

  Stream_Read_UINT32(s, tz->Bias); /* Bias */

  /* standardName (64 bytes) */

  Stream_Read(s, tz->StandardName, sizeof(tz->StandardName));

  if (!rdp_read_system_time(s, &tz->StandardDate)) /* StandardDate */

    return FALSE;

  Stream_Read_UINT32(s, tz->StandardBias);    /* StandardBias */

  /* daylightName (64 bytes) */

  Stream_Read(s, tz->DaylightName, sizeof(tz->DaylightName));

  if (!rdp_read_system_time(s, &tz->DaylightDate)) /* DaylightDate */

    return FALSE;

  Stream_Read_UINT32(s, tz->DaylightBias);    /* DaylightBias */

  return TRUE;

}

/**

 * Write client time zone information (TS_TIME_ZONE_INFORMATION).

 * msdn{cc240477}

 * @param s stream

 * @param settings settings

 *

 * @return \b TRUE for success, \b FALSE otherwise

 */

BOOL rdp_write_client_time_zone(wStream* s, rdpSettings* settings)

{

  LPTIME_ZONE_INFORMATION tz = { 0 };

  WINPR_ASSERT(settings);

  tz = settings->ClientTimeZone;

  if (!tz)

    return FALSE;

  if (!Stream_EnsureRemainingCapacity(s, 4ull + sizeof(tz->StandardName)))

    return FALSE;

  /* Bias */

  Stream_Write_UINT32(s, tz->Bias);

  /* standardName (64 bytes) */

  Stream_Write(s, tz->StandardName, sizeof(tz->StandardName));

  /* StandardDate */

  if (!rdp_write_system_time(s, &tz->StandardDate))

    return FALSE;

#ifdef WITH_DEBUG_TIMEZONE

  WLog_DBG(TIMEZONE_TAG, "bias=%" PRId32 "", tz->Bias);

  WLog_DBG(TIMEZONE_TAG, "StandardName:");

  winpr_HexDump(TIMEZONE_TAG, WLOG_DEBUG, (const BYTE*)tz->StandardName,

                sizeof(tz->StandardName));

  WLog_DBG(TIMEZONE_TAG, "DaylightName:");

  winpr_HexDump(TIMEZONE_TAG, WLOG_DEBUG, (const BYTE*)tz->DaylightName,

                sizeof(tz->DaylightName));

#endif

  /* Note that StandardBias is ignored if no valid standardDate is provided. */

  /* StandardBias */

  if (!Stream_EnsureRemainingCapacity(s, 4ull + sizeof(tz->DaylightName)))

    return FALSE;

  Stream_Write_UINT32(s, tz->StandardBias);

  DEBUG_TIMEZONE("StandardBias=%" PRId32 "", tz->StandardBias);

  /* daylightName (64 bytes) */

  Stream_Write(s, tz->DaylightName, sizeof(tz->DaylightName));

  /* DaylightDate */

  if (!rdp_write_system_time(s, &tz->DaylightDate))

    return FALSE;

  /* Note that DaylightBias is ignored if no valid daylightDate is provided. */

  /* DaylightBias */

  if (!Stream_EnsureRemainingCapacity(s, 4ull))

    return FALSE;

  Stream_Write_UINT32(s, tz->DaylightBias);

  DEBUG_TIMEZONE("DaylightBias=%" PRId32 "", tz->DaylightBias);

  return TRUE;

}