51 lines
1.8 KiB
C
51 lines
1.8 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Client
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* Implements Microsoft Point to Point Compression (MPPC) protocol
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*
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* Copyright 2012 Laxmikant Rashinkar <LK.Rashinkar@gmail.com>
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* Copyright 2012 Jay Sorg <jay.sorg@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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#ifndef __MPPC_ENC_H
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#define __MPPC_ENC_H
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#include <freerdp/types.h>
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#include <freerdp/freerdp.h>
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#define PROTO_RDP_40 1
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#define PROTO_RDP_50 2
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struct rdp_mppc_enc
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{
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int protocol_type; /* PROTO_RDP_40, PROTO_RDP_50 etc */
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char* historyBuffer; /* contains uncompressed data */
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char* outputBuffer; /* contains compressed data */
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char* outputBufferPlus;
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int historyOffset; /* next free slot in historyBuffer */
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int buf_len; /* length of historyBuffer, protocol dependant */
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int bytes_in_opb; /* compressed bytes available in outputBuffer */
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int flags; /* PACKET_COMPRESSED, PACKET_AT_FRONT, PACKET_FLUSHED etc */
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int flagsHold;
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int first_pkt; /* this is the first pkt passing through enc */
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};
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boolean compress_rdp(struct rdp_mppc_enc* enc, uint8* srcData, int len);
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boolean compress_rdp_4(struct rdp_mppc_enc* enc, uint8* srcData, int len);
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boolean compress_rdp_5(struct rdp_mppc_enc* enc, uint8* srcData, int len);
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struct rdp_mppc_enc* mppc_enc_new(int protocol_type);
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void mppc_enc_free(struct rdp_mppc_enc* enc);
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#endif
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