libfreerdp/core/timezone.c

 
#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")
 
#if !defined(WITH_DEBUG_TIMEZONE)
#define log_timezone(tzif, result)
#else
#define log_timezone(tzif, result) log_timezone_((tzif), (result), __FILE__, __func__, __LINE__)
static const char* weekday2str(WORD wDayOfWeek)
{
  switch (wDayOfWeek)
  {
    case 0:
      return "SUNDAY";
    case 1:
      return "MONDAY";
    case 2:
      return "TUESDAY";
    case 3:
      return "WEDNESDAY";
    case 4:
      return "THURSDAY";
    case 5:
      return "FRIDAY";
    case 6:
      return "SATURDAY";
    default:
      return "DAY-OF-MAGIC";
  }
}
 
static char* systemtime2str(const SYSTEMTIME* t, char* buffer, size_t len)
{
  const SYSTEMTIME empty = { 0 };
 
  if (memcmp(t, &empty, sizeof(SYSTEMTIME)) == 0)
    _snprintf(buffer, len, "{ not set }");
  else
  {
    _snprintf(buffer, len,
              "{ %" PRIu16 "-%" PRIu16 "-%" PRIu16 " [%s] %" PRIu16 ":%" PRIu16 ":%" PRIu16
              ".%" PRIu16 "}",
              t->wYear, t->wMonth, t->wDay, weekday2str(t->wDayOfWeek), t->wHour, t->wMinute,
              t->wSecond, t->wMilliseconds);
  }
  return buffer;
}
 
static void log_print(wLog* log, DWORD level, const char* file, const char* fkt, size_t line, ...)
{
  if (!WLog_IsLevelActive(log, level))
    return;
 
  va_list ap = { 0 };
  va_start(ap, line);
  WLog_PrintMessageVA(log, WLOG_MESSAGE_TEXT, level, line, file, fkt, ap);
  va_end(ap);
}
 
static void log_timezone_(const TIME_ZONE_INFORMATION* tzif, DWORD result, const char* file,
                          const char* fkt, size_t line)
{
  WINPR_ASSERT(tzif);
 
  char buffer[64] = { 0 };
  DWORD level = WLOG_TRACE;
  wLog* log = WLog_Get(TIMEZONE_TAG);
  log_print(log, level, file, fkt, line, "TIME_ZONE_INFORMATION {");
  log_print(log, level, file, fkt, line, "  Bias=%" PRIu32, tzif->Bias);
  (void)ConvertWCharNToUtf8(tzif->StandardName, ARRAYSIZE(tzif->StandardName), buffer,
                            ARRAYSIZE(buffer));
  log_print(log, level, file, fkt, line, "  StandardName=%s", buffer);
  log_print(log, level, file, fkt, line, "  StandardDate=%s",
            systemtime2str(&tzif->StandardDate, buffer, sizeof(buffer)));
  log_print(log, level, file, fkt, line, "  StandardBias=%" PRIu32, tzif->StandardBias);
 
  (void)ConvertWCharNToUtf8(tzif->DaylightName, ARRAYSIZE(tzif->DaylightName), buffer,
                            ARRAYSIZE(buffer));
  log_print(log, level, file, fkt, line, "  DaylightName=%s", buffer);
  log_print(log, level, file, fkt, line, "  DaylightDate=%s",
            systemtime2str(&tzif->DaylightDate, buffer, sizeof(buffer)));
  log_print(log, level, file, fkt, line, "  DaylightBias=%" PRIu32, tzif->DaylightBias);
 
  switch (result)
  {
    case TIME_ZONE_ID_DAYLIGHT:
      log_print(log, level, file, fkt, line, "  DaylightDate in use");
      break;
    case TIME_ZONE_ID_STANDARD:
      log_print(log, level, file, fkt, line, "  StandardDate in use");
      break;
    default:
      log_print(log, level, file, fkt, line, "  UnknownDate in use");
      break;
  }
  log_print(log, level, file, fkt, line, "}");
}
#endif
 
static BOOL rdp_read_system_time(wStream* s, SYSTEMTIME* system_time);
static BOOL rdp_write_system_time(wStream* s, const SYSTEMTIME* system_time);
 
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;
}
 
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 */
  return TRUE;
}
 
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 */
  log_timezone(tz, 0);
  return TRUE;
}
 
BOOL rdp_write_client_time_zone(wStream* s, rdpSettings* settings)
{
  WINPR_ASSERT(settings);
  const LPTIME_ZONE_INFORMATION tz = settings->ClientTimeZone;
 
  if (!tz)
    return FALSE;
 
  log_timezone(tz, 0);
  if (!Stream_EnsureRemainingCapacity(s, 4ull + sizeof(tz->StandardName)))
    return FALSE;
 
  /* Bias defined in windows headers as LONG
   * but [MS-RDPBCGR] 2.2.1.11.1.1.1.1 Time Zone Information (TS_TIME_ZONE_INFORMATION) defines it
   * as unsigned.... assume the spec is buggy as an unsigned value only works on half of the
   * world.
   */
  Stream_Write_INT32(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;
 
  /* Note that StandardBias is ignored if no valid standardDate is provided. */
  /* StandardBias */
  if (!Stream_EnsureRemainingCapacity(s, 4ull + sizeof(tz->DaylightName)))
    return FALSE;
 
  /* StandardBias defined in windows headers as LONG
   * but [MS-RDPBCGR] 2.2.1.11.1.1.1.1 Time Zone Information (TS_TIME_ZONE_INFORMATION) defines it
   * as unsigned.... assume the spec is buggy as an unsigned value only works on half of the
   * world.
   */
  Stream_Write_INT32(s, 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;
 
  /* DaylightBias defined in windows headers as LONG
   * but [MS-RDPBCGR] 2.2.1.11.1.1.1.1 Time Zone Information (TS_TIME_ZONE_INFORMATION) defines it
   * as unsigned.... assume the spec is buggy as an unsigned value only works on half of the
   * world.
   */
  Stream_Write_INT32(s, tz->DaylightBias);
 
  return TRUE;
}