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FreeRDP/libfreerdp/core/bulk.c

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/**
* FreeRDP: A Remote Desktop Protocol Implementation
* Bulk Compression
*
* Copyright 2014 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "bulk.h"
#define TAG "com.freerdp.core"
//#define WITH_BULK_DEBUG 1
struct rdp_bulk
{
rdpContext* context;
UINT32 CompressionLevel;
UINT32 CompressionMaxSize;
MPPC_CONTEXT* mppcSend;
MPPC_CONTEXT* mppcRecv;
NCRUSH_CONTEXT* ncrushRecv;
NCRUSH_CONTEXT* ncrushSend;
XCRUSH_CONTEXT* xcrushRecv;
XCRUSH_CONTEXT* xcrushSend;
BYTE OutputBuffer[65536];
};
#if WITH_BULK_DEBUG
static INLINE const char* bulk_get_compression_flags_string(UINT32 flags)
{
flags &= BULK_COMPRESSION_FLAGS_MASK;
if (flags == 0)
return "PACKET_UNCOMPRESSED";
else if (flags == PACKET_COMPRESSED)
return "PACKET_COMPRESSED";
else if (flags == PACKET_AT_FRONT)
return "PACKET_AT_FRONT";
else if (flags == PACKET_FLUSHED)
return "PACKET_FLUSHED";
else if (flags == (PACKET_COMPRESSED | PACKET_AT_FRONT))
return "PACKET_COMPRESSED | PACKET_AT_FRONT";
else if (flags == (PACKET_COMPRESSED | PACKET_FLUSHED))
return "PACKET_COMPRESSED | PACKET_FLUSHED";
else if (flags == (PACKET_AT_FRONT | PACKET_FLUSHED))
return "PACKET_AT_FRONT | PACKET_FLUSHED";
else if (flags == (PACKET_COMPRESSED | PACKET_AT_FRONT | PACKET_FLUSHED))
return "PACKET_COMPRESSED | PACKET_AT_FRONT | PACKET_FLUSHED";
return "PACKET_UNKNOWN";
}
#endif
static UINT32 bulk_compression_level(rdpBulk* bulk)
{
rdpSettings* settings = bulk->context->settings;
bulk->CompressionLevel = (settings->CompressionLevel >= PACKET_COMPR_TYPE_RDP61)
? PACKET_COMPR_TYPE_RDP61
: settings->CompressionLevel;
return bulk->CompressionLevel;
}
UINT32 bulk_compression_max_size(rdpBulk* bulk)
{
bulk_compression_level(bulk);
bulk->CompressionMaxSize = (bulk->CompressionLevel < PACKET_COMPR_TYPE_64K) ? 8192 : 65536;
return bulk->CompressionMaxSize;
}
#if WITH_BULK_DEBUG
static INLINE int bulk_compress_validate(rdpBulk* bulk, BYTE* pSrcData, UINT32 SrcSize,
BYTE** ppDstData, UINT32* pDstSize, UINT32* pFlags)
{
int status;
BYTE* _pSrcData = NULL;
BYTE* _pDstData = NULL;
UINT32 _SrcSize = 0;
UINT32 _DstSize = 0;
UINT32 _Flags = 0;
_pSrcData = *ppDstData;
_SrcSize = *pDstSize;
_Flags = *pFlags | bulk->CompressionLevel;
status = bulk_decompress(bulk, _pSrcData, _SrcSize, &_pDstData, &_DstSize, _Flags);
if (status < 0)
{
WLog_DBG(TAG, "compression/decompression failure");
return status;
}
if (_DstSize != SrcSize)
{
WLog_DBG(TAG,
"compression/decompression size mismatch: Actual: %" PRIu32 ", Expected: %" PRIu32
"",
_DstSize, SrcSize);
return -1;
}
if (memcmp(_pDstData, pSrcData, SrcSize) != 0)
{
WLog_DBG(TAG, "compression/decompression input/output mismatch! flags: 0x%08" PRIX32 "",
_Flags);
#if 1
WLog_DBG(TAG, "Actual:");
winpr_HexDump(TAG, WLOG_DEBUG, _pDstData, SrcSize);
WLog_DBG(TAG, "Expected:");
winpr_HexDump(TAG, WLOG_DEBUG, pSrcData, SrcSize);
#endif
return -1;
}
return status;
}
#endif
int bulk_decompress(rdpBulk* bulk, BYTE* pSrcData, UINT32 SrcSize, BYTE** ppDstData,
UINT32* pDstSize, UINT32 flags)
{
UINT32 type;
int status = -1;
rdpMetrics* metrics;
UINT32 CompressedBytes;
UINT32 UncompressedBytes;
double CompressionRatio;
metrics = bulk->context->metrics;
bulk_compression_max_size(bulk);
type = flags & BULK_COMPRESSION_TYPE_MASK;
if (flags & BULK_COMPRESSION_FLAGS_MASK)
{
switch (type)
{
case PACKET_COMPR_TYPE_8K:
mppc_set_compression_level(bulk->mppcRecv, 0);
status =
mppc_decompress(bulk->mppcRecv, pSrcData, SrcSize, ppDstData, pDstSize, flags);
break;
case PACKET_COMPR_TYPE_64K:
mppc_set_compression_level(bulk->mppcRecv, 1);
status =
mppc_decompress(bulk->mppcRecv, pSrcData, SrcSize, ppDstData, pDstSize, flags);
break;
case PACKET_COMPR_TYPE_RDP6:
status = ncrush_decompress(bulk->ncrushRecv, pSrcData, SrcSize, ppDstData, pDstSize,
flags);
break;
case PACKET_COMPR_TYPE_RDP61:
status = xcrush_decompress(bulk->xcrushRecv, pSrcData, SrcSize, ppDstData, pDstSize,
flags);
break;
case PACKET_COMPR_TYPE_RDP8:
WLog_ERR(TAG, "Unsupported bulk compression type %08" PRIx32,
bulk->CompressionLevel);
status = -1;
break;
default:
WLog_ERR(TAG, "Unknown bulk compression type %08" PRIx32, bulk->CompressionLevel);
status = -1;
break;
}
}
else
{
*ppDstData = pSrcData;
*pDstSize = SrcSize;
status = 0;
}
if (status >= 0)
{
CompressedBytes = SrcSize;
UncompressedBytes = *pDstSize;
CompressionRatio = metrics_write_bytes(metrics, UncompressedBytes, CompressedBytes);
#ifdef WITH_BULK_DEBUG
{
WLog_DBG(TAG,
"Decompress Type: %" PRIu32 " Flags: %s (0x%08" PRIX32
") Compression Ratio: %f (%" PRIu32 " / %" PRIu32 "), Total: %f (%" PRIu64
" / %" PRIu64 ")",
type, bulk_get_compression_flags_string(flags), flags, CompressionRatio,
CompressedBytes, UncompressedBytes, metrics->TotalCompressionRatio,
metrics->TotalCompressedBytes, metrics->TotalUncompressedBytes);
}
#else
WINPR_UNUSED(CompressionRatio);
#endif
}
else
{
WLog_ERR(TAG, "Decompression failure!");
}
return status;
}
int bulk_compress(rdpBulk* bulk, BYTE* pSrcData, UINT32 SrcSize, BYTE** ppDstData, UINT32* pDstSize,
UINT32* pFlags)
{
int status = -1;
rdpMetrics* metrics;
UINT32 CompressedBytes;
UINT32 UncompressedBytes;
double CompressionRatio;
metrics = bulk->context->metrics;
if ((SrcSize <= 50) || (SrcSize >= 16384))
{
*ppDstData = pSrcData;
*pDstSize = SrcSize;
return 0;
}
*ppDstData = bulk->OutputBuffer;
*pDstSize = sizeof(bulk->OutputBuffer);
bulk_compression_level(bulk);
bulk_compression_max_size(bulk);
switch (bulk->CompressionLevel)
{
case PACKET_COMPR_TYPE_8K:
case PACKET_COMPR_TYPE_64K:
mppc_set_compression_level(bulk->mppcSend, bulk->CompressionLevel);
status = mppc_compress(bulk->mppcSend, pSrcData, SrcSize, ppDstData, pDstSize, pFlags);
break;
case PACKET_COMPR_TYPE_RDP6:
status =
ncrush_compress(bulk->ncrushSend, pSrcData, SrcSize, ppDstData, pDstSize, pFlags);
break;
case PACKET_COMPR_TYPE_RDP61:
status =
xcrush_compress(bulk->xcrushSend, pSrcData, SrcSize, ppDstData, pDstSize, pFlags);
break;
case PACKET_COMPR_TYPE_RDP8:
WLog_ERR(TAG, "Unsupported bulk compression type %08" PRIx32, bulk->CompressionLevel);
status = -1;
break;
default:
WLog_ERR(TAG, "Unknown bulk compression type %08" PRIx32, bulk->CompressionLevel);
status = -1;
break;
}
if (status >= 0)
{
CompressedBytes = *pDstSize;
UncompressedBytes = SrcSize;
CompressionRatio = metrics_write_bytes(metrics, UncompressedBytes, CompressedBytes);
#ifdef WITH_BULK_DEBUG
{
WLog_DBG(TAG,
"Compress Type: %" PRIu32 " Flags: %s (0x%08" PRIX32
") Compression Ratio: %f (%" PRIu32 " / %" PRIu32 "), Total: %f (%" PRIu64
" / %" PRIu64 ")",
bulk->CompressionLevel, bulk_get_compression_flags_string(*pFlags), *pFlags,
CompressionRatio, CompressedBytes, UncompressedBytes,
metrics->TotalCompressionRatio, metrics->TotalCompressedBytes,
metrics->TotalUncompressedBytes);
}
#else
WINPR_UNUSED(CompressionRatio);
#endif
}
#if WITH_BULK_DEBUG
if (bulk_compress_validate(bulk, pSrcData, SrcSize, ppDstData, pDstSize, pFlags) < 0)
status = -1;
#endif
return status;
}
void bulk_reset(rdpBulk* bulk)
{
mppc_context_reset(bulk->mppcSend, FALSE);
mppc_context_reset(bulk->mppcRecv, FALSE);
ncrush_context_reset(bulk->ncrushRecv, FALSE);
ncrush_context_reset(bulk->ncrushSend, FALSE);
xcrush_context_reset(bulk->xcrushRecv, FALSE);
xcrush_context_reset(bulk->xcrushSend, FALSE);
}
rdpBulk* bulk_new(rdpContext* context)
{
rdpBulk* bulk;
bulk = (rdpBulk*)calloc(1, sizeof(rdpBulk));
if (bulk)
{
bulk->context = context;
bulk->mppcSend = mppc_context_new(1, TRUE);
bulk->mppcRecv = mppc_context_new(1, FALSE);
bulk->ncrushRecv = ncrush_context_new(FALSE);
bulk->ncrushSend = ncrush_context_new(TRUE);
bulk->xcrushRecv = xcrush_context_new(FALSE);
bulk->xcrushSend = xcrush_context_new(TRUE);
bulk->CompressionLevel = context->settings->CompressionLevel;
}
return bulk;
}
void bulk_free(rdpBulk* bulk)
{
if (!bulk)
return;
mppc_context_free(bulk->mppcSend);
mppc_context_free(bulk->mppcRecv);
ncrush_context_free(bulk->ncrushRecv);
ncrush_context_free(bulk->ncrushSend);
xcrush_context_free(bulk->xcrushRecv);
xcrush_context_free(bulk->xcrushSend);
free(bulk);
}
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