178 lines
4.9 KiB
C
178 lines
4.9 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* Fast Path
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*
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* Copyright 2011 Vic Lee
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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 FREERDP_LIB_CORE_FASTPATH_H
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#define FREERDP_LIB_CORE_FASTPATH_H
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/*
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* Fast-Path has 15 bits available for length information which would lead to a
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* maximal pdu size of 0x8000. However in practice only 14 bits are used
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* this isn't documented anywhere but it looks like most implementations will
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* fail if fast-path packages > 0x3FFF arrive.
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*/
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#define FASTPATH_MAX_PACKET_SIZE 0x3FFF
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/*
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* The following size guarantees that no fast-path PDU fragmentation occurs.
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* It was calculated by subtracting 128 from FASTPATH_MAX_PACKET_SIZE.
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* 128 was chosen because it includes all required and optional headers as well as
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* possible paddings and some extra bytes for safety.
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*/
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#define FASTPATH_FRAGMENT_SAFE_SIZE 0x3F80
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typedef struct rdp_fastpath rdpFastPath;
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#include "rdp.h"
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#include <winpr/stream.h>
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#include <freerdp/api.h>
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enum FASTPATH_INPUT_ACTION_TYPE
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{
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FASTPATH_INPUT_ACTION_FASTPATH = 0x0,
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FASTPATH_INPUT_ACTION_X224 = 0x3
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};
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enum FASTPATH_OUTPUT_ACTION_TYPE
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{
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FASTPATH_OUTPUT_ACTION_FASTPATH = 0x0,
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FASTPATH_OUTPUT_ACTION_X224 = 0x3
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};
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enum FASTPATH_INPUT_ENCRYPTION_FLAGS
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{
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FASTPATH_INPUT_SECURE_CHECKSUM = 0x1,
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FASTPATH_INPUT_ENCRYPTED = 0x2
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};
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enum FASTPATH_OUTPUT_ENCRYPTION_FLAGS
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{
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FASTPATH_OUTPUT_SECURE_CHECKSUM = 0x1,
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FASTPATH_OUTPUT_ENCRYPTED = 0x2
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};
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enum FASTPATH_UPDATETYPE
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{
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FASTPATH_UPDATETYPE_ORDERS = 0x0,
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FASTPATH_UPDATETYPE_BITMAP = 0x1,
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FASTPATH_UPDATETYPE_PALETTE = 0x2,
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FASTPATH_UPDATETYPE_SYNCHRONIZE = 0x3,
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FASTPATH_UPDATETYPE_SURFCMDS = 0x4,
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FASTPATH_UPDATETYPE_PTR_NULL = 0x5,
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FASTPATH_UPDATETYPE_PTR_DEFAULT = 0x6,
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FASTPATH_UPDATETYPE_PTR_POSITION = 0x8,
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FASTPATH_UPDATETYPE_COLOR = 0x9,
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FASTPATH_UPDATETYPE_CACHED = 0xA,
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FASTPATH_UPDATETYPE_POINTER = 0xB
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};
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enum FASTPATH_FRAGMENT
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{
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FASTPATH_FRAGMENT_SINGLE = 0x0,
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FASTPATH_FRAGMENT_LAST = 0x1,
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FASTPATH_FRAGMENT_FIRST = 0x2,
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FASTPATH_FRAGMENT_NEXT = 0x3
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};
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enum FASTPATH_OUTPUT_COMPRESSION
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{
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FASTPATH_OUTPUT_COMPRESSION_USED = 0x2
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};
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/* FastPath Input Events */
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enum FASTPATH_INPUT_EVENT_CODE
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{
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FASTPATH_INPUT_EVENT_SCANCODE = 0x0,
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FASTPATH_INPUT_EVENT_MOUSE = 0x1,
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FASTPATH_INPUT_EVENT_MOUSEX = 0x2,
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FASTPATH_INPUT_EVENT_SYNC = 0x3,
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FASTPATH_INPUT_EVENT_UNICODE = 0x4
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};
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/* FastPath Keyboard Event Flags */
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enum FASTPATH_INPUT_KBDFLAGS
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{
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FASTPATH_INPUT_KBDFLAGS_RELEASE = 0x01,
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FASTPATH_INPUT_KBDFLAGS_EXTENDED = 0x02,
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FASTPATH_INPUT_KBDFLAGS_PREFIX_E1 = 0x04 /* for pause sequence */
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};
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struct _FASTPATH_UPDATE_PDU_HEADER
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{
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BYTE fpOutputHeader;
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BYTE length1;
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BYTE length2;
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BYTE fipsInformation[4];
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BYTE dataSignature[8];
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BYTE action;
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BYTE secFlags;
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UINT16 length;
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};
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typedef struct _FASTPATH_UPDATE_PDU_HEADER FASTPATH_UPDATE_PDU_HEADER;
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struct _FASTPATH_UPDATE_HEADER
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{
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BYTE updateHeader;
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BYTE compressionFlags;
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UINT16 size;
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BYTE updateCode;
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BYTE fragmentation;
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BYTE compression;
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};
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typedef struct _FASTPATH_UPDATE_HEADER FASTPATH_UPDATE_HEADER;
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struct rdp_fastpath
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{
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rdpRdp* rdp;
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wStream* fs;
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BYTE encryptionFlags;
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BYTE numberEvents;
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wStream* updateData;
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int fragmentation;
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};
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FREERDP_LOCAL UINT16 fastpath_header_length(wStream* s);
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FREERDP_LOCAL UINT16 fastpath_read_header(rdpFastPath* fastpath, wStream* s);
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FREERDP_LOCAL BOOL fastpath_read_header_rdp(rdpFastPath* fastpath, wStream* s,
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UINT16* length);
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FREERDP_LOCAL int fastpath_recv_updates(rdpFastPath* fastpath, wStream* s);
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FREERDP_LOCAL int fastpath_recv_inputs(rdpFastPath* fastpath, wStream* s);
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FREERDP_LOCAL wStream* fastpath_input_pdu_init_header(rdpFastPath* fastpath);
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FREERDP_LOCAL wStream* fastpath_input_pdu_init(rdpFastPath* fastpath,
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BYTE eventFlags, BYTE eventCode);
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FREERDP_LOCAL BOOL fastpath_send_multiple_input_pdu(rdpFastPath* fastpath,
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wStream* s, int iEventCount);
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FREERDP_LOCAL BOOL fastpath_send_input_pdu(rdpFastPath* fastpath, wStream* s);
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FREERDP_LOCAL wStream* fastpath_update_pdu_init(rdpFastPath* fastpath);
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FREERDP_LOCAL wStream* fastpath_update_pdu_init_new(rdpFastPath* fastpath);
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FREERDP_LOCAL BOOL fastpath_send_update_pdu(rdpFastPath* fastpath,
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BYTE updateCode, wStream* s, BOOL skipCompression);
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FREERDP_LOCAL BOOL fastpath_send_surfcmd_frame_marker(rdpFastPath* fastpath,
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UINT16 frameAction, UINT32 frameId);
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FREERDP_LOCAL rdpFastPath* fastpath_new(rdpRdp* rdp);
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FREERDP_LOCAL void fastpath_free(rdpFastPath* fastpath);
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#endif /* FREERDP_LIB_CORE_FASTPATH_H */
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