mirror of https://github.com/FreeRDP/FreeRDP
114 lines
2.6 KiB
C
114 lines
2.6 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* Bulk Compression
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*
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* Copyright 2014 Marc-Andre Moreau <marcandre.moreau@gmail.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "bulk.h"
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int bulk_decompress(rdpBulk* bulk, BYTE* pSrcData, UINT32 SrcSize, BYTE** ppDstData, UINT32* pDstSize, UINT32 flags)
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{
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int status = -1;
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UINT32 roff = 0;
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UINT32 rlen = 0;
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UINT32 type = flags & 0x0F;
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switch (type)
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{
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case PACKET_COMPR_TYPE_8K:
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status = decompress_rdp_4(bulk->mppc_dec, pSrcData, SrcSize, flags, &roff, &rlen);
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*ppDstData = (bulk->mppc_dec->history_buf + roff);
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*pDstSize = rlen;
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break;
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case PACKET_COMPR_TYPE_64K:
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status = decompress_rdp_5(bulk->mppc_dec, pSrcData, SrcSize, flags, &roff, &rlen);
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*ppDstData = (bulk->mppc_dec->history_buf + roff);
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*pDstSize = rlen;
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break;
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case PACKET_COMPR_TYPE_RDP6:
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status = decompress_rdp_6(bulk->mppc_dec, pSrcData, SrcSize, flags, &roff, &rlen);
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*ppDstData = (bulk->mppc_dec->history_buf + roff);
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*pDstSize = rlen;
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break;
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case PACKET_COMPR_TYPE_RDP61:
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status = -1;
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break;
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case PACKET_COMPR_TYPE_RDP8:
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status = -1;
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break;
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}
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return status;
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}
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int bulk_compress(rdpBulk* bulk, BYTE* pSrcData, UINT32 SrcSize, BYTE** ppDstData, UINT32* pDstSize, UINT32* pFlags)
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{
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int status = -1;
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if (compress_rdp(bulk->mppc_enc, pSrcData, SrcSize))
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{
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*pFlags = (UINT32) bulk->mppc_enc->flags;
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*pDstSize = (UINT32) bulk->mppc_enc->bytes_in_opb;
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*ppDstData = (BYTE*) bulk->mppc_enc->outputBuffer;
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status = 0;
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}
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return status;
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}
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void bulk_reset(rdpBulk* bulk)
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{
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mppc_dec_free(bulk->mppc_dec);
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mppc_enc_free(bulk->mppc_enc);
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bulk->mppc_dec = mppc_dec_new();
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bulk->mppc_enc = mppc_enc_new(PROTO_RDP_50);
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}
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rdpBulk* bulk_new(rdpContext* context)
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{
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rdpBulk* bulk;
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bulk = (rdpBulk*) calloc(1, sizeof(rdpBulk));
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if (bulk)
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{
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bulk->context = context;
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bulk->mppc_dec = mppc_dec_new();
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bulk->mppc_enc = mppc_enc_new(PROTO_RDP_50);
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}
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return bulk;
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}
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void bulk_free(rdpBulk* bulk)
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{
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if (bulk)
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{
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mppc_dec_free(bulk->mppc_dec);
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mppc_enc_free(bulk->mppc_enc);
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free(bulk);
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}
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}
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