geometry_main.c

 
#include <freerdp/config.h>
 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
#include <winpr/crt.h>
#include <winpr/synch.h>
#include <winpr/print.h>
#include <winpr/stream.h>
#include <winpr/cmdline.h>
#include <winpr/collections.h>
 
#include <freerdp/addin.h>
#include <freerdp/client/channels.h>
#include <freerdp/client/geometry.h>
#include <freerdp/channels/log.h>
 
#define TAG CHANNELS_TAG("geometry.client")
 
#include "geometry_main.h"
 
typedef struct
{
  GENERIC_DYNVC_PLUGIN base;
  GeometryClientContext* context;
} GEOMETRY_PLUGIN;
 
static UINT32 mappedGeometryHash(const void* v)
{
  const UINT64* g = (const UINT64*)v;
  return (UINT32)((*g >> 32) + (*g & 0xffffffff));
}
 
static BOOL mappedGeometryKeyCompare(const void* v1, const void* v2)
{
  const UINT64* g1 = (const UINT64*)v1;
  const UINT64* g2 = (const UINT64*)v2;
  return *g1 == *g2;
}
 
static void freerdp_rgndata_reset(FREERDP_RGNDATA* data)
{
  data->nRectCount = 0;
}
 
static UINT32 geometry_read_RGNDATA(wLog* logger, wStream* s, UINT32 len, FREERDP_RGNDATA* rgndata)
{
  UINT32 dwSize = 0;
  UINT32 iType = 0;
  INT32 right = 0;
  INT32 bottom = 0;
  INT32 x = 0;
  INT32 y = 0;
  INT32 w = 0;
  INT32 h = 0;
 
  if (len < 32)
  {
    WLog_Print(logger, WLOG_ERROR, "invalid RGNDATA");
    return ERROR_INVALID_DATA;
  }
 
  Stream_Read_UINT32(s, dwSize);
 
  if (dwSize != 32)
  {
    WLog_Print(logger, WLOG_ERROR, "invalid RGNDATA dwSize");
    return ERROR_INVALID_DATA;
  }
 
  Stream_Read_UINT32(s, iType);
 
  if (iType != RDH_RECTANGLE)
  {
    WLog_Print(logger, WLOG_ERROR, "iType %" PRIu32 " for RGNDATA is not supported", iType);
    return ERROR_UNSUPPORTED_TYPE;
  }
 
  Stream_Read_UINT32(s, rgndata->nRectCount);
  Stream_Seek_UINT32(s); /* nRgnSize IGNORED */
  Stream_Read_INT32(s, x);
  Stream_Read_INT32(s, y);
  Stream_Read_INT32(s, right);
  Stream_Read_INT32(s, bottom);
  if ((abs(x) > INT16_MAX) || (abs(y) > INT16_MAX))
    return ERROR_INVALID_DATA;
  w = right - x;
  h = bottom - y;
  if ((abs(w) > INT16_MAX) || (abs(h) > INT16_MAX))
    return ERROR_INVALID_DATA;
  rgndata->boundingRect.x = (INT16)x;
  rgndata->boundingRect.y = (INT16)y;
  rgndata->boundingRect.width = (INT16)w;
  rgndata->boundingRect.height = (INT16)h;
  len -= 32;
 
  if (len / (4 * 4) < rgndata->nRectCount)
  {
    WLog_Print(logger, WLOG_ERROR, "not enough data for region rectangles");
    return ERROR_INVALID_DATA;
  }
 
  if (rgndata->nRectCount)
  {
    RDP_RECT* tmp = realloc(rgndata->rects, rgndata->nRectCount * sizeof(RDP_RECT));
 
    if (!tmp)
    {
      WLog_Print(logger, WLOG_ERROR, "unable to allocate memory for %" PRIu32 " RECTs",
                 rgndata->nRectCount);
      return CHANNEL_RC_NO_MEMORY;
    }
    rgndata->rects = tmp;
 
    for (UINT32 i = 0; i < rgndata->nRectCount; i++)
    {
      Stream_Read_INT32(s, x);
      Stream_Read_INT32(s, y);
      Stream_Read_INT32(s, right);
      Stream_Read_INT32(s, bottom);
      if ((abs(x) > INT16_MAX) || (abs(y) > INT16_MAX))
        return ERROR_INVALID_DATA;
      w = right - x;
      h = bottom - y;
      if ((abs(w) > INT16_MAX) || (abs(h) > INT16_MAX))
        return ERROR_INVALID_DATA;
      rgndata->rects[i].x = (INT16)x;
      rgndata->rects[i].y = (INT16)y;
      rgndata->rects[i].width = (INT16)w;
      rgndata->rects[i].height = (INT16)h;
    }
  }
 
  return CHANNEL_RC_OK;
}
 
static UINT geometry_recv_pdu(GENERIC_CHANNEL_CALLBACK* callback, wStream* s)
{
  UINT32 length = 0;
  UINT32 cbGeometryBuffer = 0;
  MAPPED_GEOMETRY* mappedGeometry = NULL;
  GEOMETRY_PLUGIN* geometry = NULL;
  GeometryClientContext* context = NULL;
  UINT ret = CHANNEL_RC_OK;
  UINT32 updateType = 0;
  UINT32 geometryType = 0;
  UINT64 id = 0;
  wLog* logger = NULL;
 
  geometry = (GEOMETRY_PLUGIN*)callback->plugin;
  logger = geometry->base.log;
  context = (GeometryClientContext*)geometry->base.iface.pInterface;
 
  if (!Stream_CheckAndLogRequiredLength(TAG, s, 4))
    return ERROR_INVALID_DATA;
 
  Stream_Read_UINT32(s, length); /* Length (4 bytes) */
 
  if (length < 73 || !Stream_CheckAndLogRequiredLength(TAG, s, (length - 4)))
  {
    WLog_Print(logger, WLOG_ERROR, "invalid packet length");
    return ERROR_INVALID_DATA;
  }
 
  Stream_Read_UINT32(s, context->remoteVersion);
  Stream_Read_UINT64(s, id);
  Stream_Read_UINT32(s, updateType);
  Stream_Seek_UINT32(s); /* flags */
 
  mappedGeometry = HashTable_GetItemValue(context->geometries, &id);
 
  if (updateType == GEOMETRY_CLEAR)
  {
    if (!mappedGeometry)
    {
      WLog_Print(logger, WLOG_ERROR,
                 "geometry 0x%" PRIx64 " not found here, ignoring clear command", id);
      return CHANNEL_RC_OK;
    }
 
    WLog_Print(logger, WLOG_DEBUG, "clearing geometry 0x%" PRIx64 "", id);
 
    if (mappedGeometry->MappedGeometryClear &&
        !mappedGeometry->MappedGeometryClear(mappedGeometry))
      return ERROR_INTERNAL_ERROR;
 
    if (!HashTable_Remove(context->geometries, &id))
      WLog_Print(logger, WLOG_ERROR, "geometry not removed from geometries");
  }
  else if (updateType == GEOMETRY_UPDATE)
  {
    BOOL newOne = FALSE;
 
    if (!mappedGeometry)
    {
      newOne = TRUE;
      WLog_Print(logger, WLOG_DEBUG, "creating geometry 0x%" PRIx64 "", id);
      mappedGeometry = calloc(1, sizeof(MAPPED_GEOMETRY));
      if (!mappedGeometry)
        return CHANNEL_RC_NO_MEMORY;
 
      mappedGeometry->refCounter = 1;
      mappedGeometry->mappingId = id;
 
      if (!HashTable_Insert(context->geometries, &(mappedGeometry->mappingId),
                            mappedGeometry))
      {
        WLog_Print(logger, WLOG_ERROR,
                   "unable to register geometry 0x%" PRIx64 " in the table", id);
        free(mappedGeometry);
        return CHANNEL_RC_NO_MEMORY;
      }
    }
    else
    {
      WLog_Print(logger, WLOG_DEBUG, "updating geometry 0x%" PRIx64 "", id);
    }
 
    Stream_Read_UINT64(s, mappedGeometry->topLevelId);
 
    Stream_Read_INT32(s, mappedGeometry->left);
    Stream_Read_INT32(s, mappedGeometry->top);
    Stream_Read_INT32(s, mappedGeometry->right);
    Stream_Read_INT32(s, mappedGeometry->bottom);
 
    Stream_Read_INT32(s, mappedGeometry->topLevelLeft);
    Stream_Read_INT32(s, mappedGeometry->topLevelTop);
    Stream_Read_INT32(s, mappedGeometry->topLevelRight);
    Stream_Read_INT32(s, mappedGeometry->topLevelBottom);
 
    Stream_Read_UINT32(s, geometryType);
    if (geometryType != 0x02)
      WLog_Print(logger, WLOG_DEBUG, "geometryType should be set to 0x02 and is 0x%" PRIx32,
                 geometryType);
 
    Stream_Read_UINT32(s, cbGeometryBuffer);
    if (!Stream_CheckAndLogRequiredLength(TAG, s, cbGeometryBuffer))
    {
      // NOLINTNEXTLINE(clang-analyzer-unix.Malloc): HashTable_Insert ownership mappedGeometry
      return ERROR_INVALID_DATA;
    }
 
    if (cbGeometryBuffer)
    {
      ret = geometry_read_RGNDATA(logger, s, cbGeometryBuffer, &mappedGeometry->geometry);
      if (ret != CHANNEL_RC_OK)
        return ret;
    }
    else
    {
      freerdp_rgndata_reset(&mappedGeometry->geometry);
    }
 
    if (newOne)
    {
      if (context->MappedGeometryAdded &&
          !context->MappedGeometryAdded(context, mappedGeometry))
      {
        WLog_Print(logger, WLOG_ERROR, "geometry added callback failed");
        ret = ERROR_INTERNAL_ERROR;
      }
    }
    else
    {
      if (mappedGeometry->MappedGeometryUpdate &&
          !mappedGeometry->MappedGeometryUpdate(mappedGeometry))
      {
        WLog_Print(logger, WLOG_ERROR, "geometry update callback failed");
        ret = ERROR_INTERNAL_ERROR;
      }
    }
  }
  else
  {
    WLog_Print(logger, WLOG_ERROR, "unknown updateType=%" PRIu32 "", updateType);
    ret = CHANNEL_RC_OK;
  }
 
  return ret;
}
 
static UINT geometry_on_data_received(IWTSVirtualChannelCallback* pChannelCallback, wStream* data)
{
  GENERIC_CHANNEL_CALLBACK* callback = (GENERIC_CHANNEL_CALLBACK*)pChannelCallback;
  return geometry_recv_pdu(callback, data);
}
 
static UINT geometry_on_close(IWTSVirtualChannelCallback* pChannelCallback)
{
  free(pChannelCallback);
  return CHANNEL_RC_OK;
}
 
static void mappedGeometryUnref_void(void* arg)
{
  MAPPED_GEOMETRY* g = (MAPPED_GEOMETRY*)arg;
  mappedGeometryUnref(g);
}
 
static const IWTSVirtualChannelCallback geometry_callbacks = { geometry_on_data_received,
                                                             NULL, /* Open */
                                                             geometry_on_close, NULL };
 
static UINT init_plugin_cb(GENERIC_DYNVC_PLUGIN* base, rdpContext* rcontext, rdpSettings* settings)
{
  GeometryClientContext* context = NULL;
  GEOMETRY_PLUGIN* geometry = (GEOMETRY_PLUGIN*)base;
 
  WINPR_ASSERT(base);
  WINPR_UNUSED(settings);
 
  context = (GeometryClientContext*)calloc(1, sizeof(GeometryClientContext));
  if (!context)
  {
    WLog_Print(base->log, WLOG_ERROR, "calloc failed!");
    return CHANNEL_RC_NO_MEMORY;
  }
 
  context->geometries = HashTable_New(FALSE);
  if (!context->geometries)
  {
    WLog_Print(base->log, WLOG_ERROR, "unable to allocate geometries");
    free(context);
    return CHANNEL_RC_NO_MEMORY;
  }
 
  HashTable_SetHashFunction(context->geometries, mappedGeometryHash);
  {
    wObject* obj = HashTable_KeyObject(context->geometries);
    obj->fnObjectEquals = mappedGeometryKeyCompare;
  }
  {
    wObject* obj = HashTable_ValueObject(context->geometries);
    obj->fnObjectFree = mappedGeometryUnref_void;
  }
  context->handle = (void*)geometry;
 
  geometry->context = context;
  geometry->base.iface.pInterface = (void*)context;
 
  return CHANNEL_RC_OK;
}
 
static void terminate_plugin_cb(GENERIC_DYNVC_PLUGIN* base)
{
  GEOMETRY_PLUGIN* geometry = (GEOMETRY_PLUGIN*)base;
 
  if (geometry->context)
    HashTable_Free(geometry->context->geometries);
  free(geometry->context);
}
 
FREERDP_ENTRY_POINT(UINT VCAPITYPE geometry_DVCPluginEntry(IDRDYNVC_ENTRY_POINTS* pEntryPoints))
{
  return freerdp_generic_DVCPluginEntry(pEntryPoints, TAG, GEOMETRY_DVC_CHANNEL_NAME,
                                        sizeof(GEOMETRY_PLUGIN), sizeof(GENERIC_CHANNEL_CALLBACK),
                                        &geometry_callbacks, init_plugin_cb, terminate_plugin_cb);
}