surface.c

 
#include <freerdp/config.h>
 
#include "settings.h"
 
#include <winpr/assert.h>
 
#include <freerdp/utils/pcap.h>
#include <freerdp/log.h>
 
#include "../cache/cache.h"
#include "surface.h"
 
#define TAG FREERDP_TAG("core.surface")
 
static BOOL update_recv_surfcmd_bitmap_header_ex(wStream* s, TS_COMPRESSED_BITMAP_HEADER_EX* header)
{
  if (!s || !header)
    return FALSE;
 
  if (!Stream_CheckAndLogRequiredLength(TAG, s, 24))
    return FALSE;
 
  Stream_Read_UINT32(s, header->highUniqueId);
  Stream_Read_UINT32(s, header->lowUniqueId);
  Stream_Read_UINT64(s, header->tmMilliseconds);
  Stream_Read_UINT64(s, header->tmSeconds);
  return TRUE;
}
 
static BOOL update_recv_surfcmd_bitmap_ex(wStream* s, TS_BITMAP_DATA_EX* bmp)
{
  if (!s || !bmp)
    return FALSE;
 
  if (!Stream_CheckAndLogRequiredLength(TAG, s, 12))
    return FALSE;
 
  Stream_Read_UINT8(s, bmp->bpp);
  Stream_Read_UINT8(s, bmp->flags);
  Stream_Seek(s, 1); /* reserved */
  Stream_Read_UINT8(s, bmp->codecID);
  Stream_Read_UINT16(s, bmp->width);
  Stream_Read_UINT16(s, bmp->height);
  Stream_Read_UINT32(s, bmp->bitmapDataLength);
 
  if ((bmp->width == 0) || (bmp->height == 0))
  {
    WLog_ERR(TAG, "invalid size value width=%" PRIu16 ", height=%" PRIu16, bmp->width,
             bmp->height);
    return FALSE;
  }
 
  if ((bmp->bpp < 1) || (bmp->bpp > 32))
  {
    WLog_ERR(TAG, "invalid bpp value %" PRIu32 "", bmp->bpp);
    return FALSE;
  }
 
  if (bmp->flags & EX_COMPRESSED_BITMAP_HEADER_PRESENT)
  {
    if (!update_recv_surfcmd_bitmap_header_ex(s, &bmp->exBitmapDataHeader))
      return FALSE;
  }
 
  bmp->bitmapData = Stream_Pointer(s);
  if (!Stream_SafeSeek(s, bmp->bitmapDataLength))
  {
    WLog_ERR(TAG, "expected bitmapDataLength %" PRIu32 ", not enough data",
             bmp->bitmapDataLength);
    return FALSE;
  }
  return TRUE;
}
 
static BOOL update_recv_surfcmd_is_rect_valid(const rdpContext* context,
                                              const SURFACE_BITS_COMMAND* cmd)
{
  WINPR_ASSERT(context);
  WINPR_ASSERT(context->settings);
  WINPR_ASSERT(cmd);
 
  /* We need a rectangle with left/top being smaller than right/bottom.
   * Also do not allow empty rectangles. */
  if ((cmd->destTop >= cmd->destBottom) || (cmd->destLeft >= cmd->destRight))
  {
    WLog_WARN(TAG,
              "Empty surface bits command rectangle: %" PRIu16 "x%" PRIu16 "-%" PRIu16
              "x%" PRIu16,
              cmd->destLeft, cmd->destTop, cmd->destRight, cmd->destBottom);
    return FALSE;
  }
 
  /* The rectangle needs to fit into our session size */
  if ((cmd->destRight > context->settings->DesktopWidth) ||
      (cmd->destBottom > context->settings->DesktopHeight))
  {
    WLog_WARN(TAG,
              "Invalid surface bits command rectangle: %" PRIu16 "x%" PRIu16 "-%" PRIu16
              "x%" PRIu16 " does not fit %" PRIu32 "x%" PRIu32,
              cmd->destLeft, cmd->destTop, cmd->destRight, cmd->destBottom,
              context->settings->DesktopWidth, context->settings->DesktopHeight);
    return FALSE;
  }
 
  return TRUE;
}
 
static BOOL update_recv_surfcmd_surface_bits(rdpUpdate* update, wStream* s, UINT16 cmdType)
{
  BOOL rc = FALSE;
  SURFACE_BITS_COMMAND cmd = { 0 };
 
  if (!Stream_CheckAndLogRequiredLength(TAG, s, 8))
    goto fail;
 
  cmd.cmdType = cmdType;
  Stream_Read_UINT16(s, cmd.destLeft);
  Stream_Read_UINT16(s, cmd.destTop);
  Stream_Read_UINT16(s, cmd.destRight);
  Stream_Read_UINT16(s, cmd.destBottom);
 
  if (!update_recv_surfcmd_is_rect_valid(update->context, &cmd))
    goto fail;
 
  if (!update_recv_surfcmd_bitmap_ex(s, &cmd.bmp))
    goto fail;
 
  if (!IFCALLRESULT(TRUE, update->SurfaceBits, update->context, &cmd))
  {
    WLog_DBG(TAG, "update->SurfaceBits implementation failed");
    goto fail;
  }
 
  rc = TRUE;
fail:
  return rc;
}
 
static BOOL update_recv_surfcmd_frame_marker(rdpUpdate* update, wStream* s)
{
  SURFACE_FRAME_MARKER marker = { 0 };
  rdp_update_internal* up = update_cast(update);
 
  WINPR_ASSERT(s);
 
  if (!Stream_CheckAndLogRequiredLength(TAG, s, 2))
    return FALSE;
 
  Stream_Read_UINT16(s, marker.frameAction);
  if (!Stream_CheckAndLogRequiredLength(TAG, s, 4))
    WLog_WARN(TAG,
              "[SERVER-BUG]: got %" PRIuz ", expected %" PRIuz
              " bytes. [MS-RDPBCGR] 2.2.9.2.3 Frame Marker Command (TS_FRAME_MARKER) is "
              "missing frameId, ignoring",
              Stream_GetRemainingLength(s), 4);
  else
    Stream_Read_UINT32(s, marker.frameId);
  WLog_Print(up->log, WLOG_DEBUG, "SurfaceFrameMarker: action: %s (%" PRIu32 ") id: %" PRIu32 "",
             (!marker.frameAction) ? "Begin" : "End", marker.frameAction, marker.frameId);
 
  if (!update->SurfaceFrameMarker)
  {
    WINPR_ASSERT(update->context);
    if (freerdp_settings_get_bool(update->context->settings, FreeRDP_DeactivateClientDecoding))
      return TRUE;
    WLog_ERR(TAG, "Missing callback update->SurfaceFrameMarker");
    return FALSE;
  }
 
  if (!update->SurfaceFrameMarker(update->context, &marker))
  {
    WLog_DBG(TAG, "update->SurfaceFrameMarker implementation failed");
    return FALSE;
  }
 
  return TRUE;
}
 
int update_recv_surfcmds(rdpUpdate* update, wStream* s)
{
  UINT16 cmdType = 0;
  rdp_update_internal* up = update_cast(update);
 
  WINPR_ASSERT(s);
 
  while (Stream_GetRemainingLength(s) >= 2)
  {
    const size_t start = Stream_GetPosition(s);
    const BYTE* mark = Stream_ConstPointer(s);
 
    Stream_Read_UINT16(s, cmdType);
 
    switch (cmdType)
    {
      case CMDTYPE_SET_SURFACE_BITS:
      case CMDTYPE_STREAM_SURFACE_BITS:
        if (!update_recv_surfcmd_surface_bits(update, s, cmdType))
          return -1;
 
        break;
 
      case CMDTYPE_FRAME_MARKER:
        if (!update_recv_surfcmd_frame_marker(update, s))
          return -1;
 
        break;
 
      default:
        WLog_ERR(TAG, "unknown cmdType 0x%04" PRIX16 "", cmdType);
        return -1;
    }
 
    if (up->dump_rfx)
    {
      const size_t size = Stream_GetPosition(s) - start;
      /* TODO: treat return values */
      pcap_add_record(up->pcap_rfx, mark, size);
      pcap_flush(up->pcap_rfx);
    }
  }
 
  return 0;
}
 
static BOOL update_write_surfcmd_bitmap_header_ex(wStream* s,
                                                  const TS_COMPRESSED_BITMAP_HEADER_EX* header)
{
  if (!s || !header)
    return FALSE;
 
  if (!Stream_EnsureRemainingCapacity(s, 24))
    return FALSE;
 
  Stream_Write_UINT32(s, header->highUniqueId);
  Stream_Write_UINT32(s, header->lowUniqueId);
  Stream_Write_UINT64(s, header->tmMilliseconds);
  Stream_Write_UINT64(s, header->tmSeconds);
  return TRUE;
}
 
static BOOL update_write_surfcmd_bitmap_ex(wStream* s, const TS_BITMAP_DATA_EX* bmp)
{
  if (!s || !bmp)
    return FALSE;
 
  if (!Stream_EnsureRemainingCapacity(s, 12))
    return FALSE;
 
  if (bmp->codecID > UINT8_MAX)
  {
    WLog_ERR(TAG, "Invalid TS_BITMAP_DATA_EX::codecID=0x%04" PRIx16 "", bmp->codecID);
    return FALSE;
  }
  Stream_Write_UINT8(s, bmp->bpp);
  Stream_Write_UINT8(s, bmp->flags);
  Stream_Write_UINT8(s, 0); /* reserved1, reserved2 */
  Stream_Write_UINT8(s, (UINT8)bmp->codecID);
  Stream_Write_UINT16(s, bmp->width);
  Stream_Write_UINT16(s, bmp->height);
  Stream_Write_UINT32(s, bmp->bitmapDataLength);
 
  if (bmp->flags & EX_COMPRESSED_BITMAP_HEADER_PRESENT)
  {
    if (!update_write_surfcmd_bitmap_header_ex(s, &bmp->exBitmapDataHeader))
      return FALSE;
  }
 
  if (!Stream_EnsureRemainingCapacity(s, bmp->bitmapDataLength))
    return FALSE;
 
  Stream_Write(s, bmp->bitmapData, bmp->bitmapDataLength);
  return TRUE;
}
 
BOOL update_write_surfcmd_surface_bits(wStream* s, const SURFACE_BITS_COMMAND* cmd)
{
  UINT16 cmdType = 0;
  if (!Stream_EnsureRemainingCapacity(s, SURFCMD_SURFACE_BITS_HEADER_LENGTH))
    return FALSE;
 
  cmdType = cmd->cmdType;
  switch (cmdType)
  {
    case CMDTYPE_SET_SURFACE_BITS:
    case CMDTYPE_STREAM_SURFACE_BITS:
      break;
    default:
      WLog_WARN(TAG,
                "SURFACE_BITS_COMMAND->cmdType 0x%04" PRIx16
                " not allowed, correcting to 0x%04" PRIx16,
                cmdType, CMDTYPE_STREAM_SURFACE_BITS);
      cmdType = CMDTYPE_STREAM_SURFACE_BITS;
      break;
  }
 
  Stream_Write_UINT16(s, cmdType);
  Stream_Write_UINT16(s, cmd->destLeft);
  Stream_Write_UINT16(s, cmd->destTop);
  Stream_Write_UINT16(s, cmd->destRight);
  Stream_Write_UINT16(s, cmd->destBottom);
  return update_write_surfcmd_bitmap_ex(s, &cmd->bmp);
}
 
BOOL update_write_surfcmd_frame_marker(wStream* s, UINT16 frameAction, UINT32 frameId)
{
  if (!Stream_EnsureRemainingCapacity(s, SURFCMD_FRAME_MARKER_LENGTH))
    return FALSE;
 
  Stream_Write_UINT16(s, CMDTYPE_FRAME_MARKER);
  Stream_Write_UINT16(s, frameAction);
  Stream_Write_UINT32(s, frameId);
  return TRUE;
}