670 lines
16 KiB
C
670 lines
16 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Client
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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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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <freerdp/api.h>
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#include <freerdp/utils/stream.h>
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#include "orders.h"
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#include "update.h"
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#include "surface.h"
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#include "fastpath.h"
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/**
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* Fast-Path packet format is defined in [MS-RDPBCGR] 2.2.9.1.2, which revises
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* server output packets from the first byte with the goal of improving
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* bandwidth.
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*
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* Slow-Path packet always starts with TPKT header, which has the first
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* byte 0x03, while Fast-Path packet starts with 2 zero bits in the first
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* two less significant bits of the first byte.
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*/
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#define FASTPATH_MAX_PACKET_SIZE 0x3FFF
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/**
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* Read a Fast-Path packet header.\n
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* @param s stream
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* @param encryptionFlags
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* @return length
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*/
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uint16 fastpath_read_header(rdpFastPath* fastpath, STREAM* s)
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{
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uint8 header;
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uint16 length;
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uint8 t;
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stream_read_uint8(s, header);
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if (fastpath != NULL)
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{
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fastpath->encryptionFlags = (header & 0xC0) >> 6;
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fastpath->numberEvents = (header & 0x3C) >> 2;
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}
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stream_read_uint8(s, length); /* length1 */
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/* If most significant bit is not set, length2 is not presented. */
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if ((length & 0x80))
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{
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length &= 0x7F;
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length <<= 8;
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stream_read_uint8(s, t);
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length += t;
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}
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return length;
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}
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INLINE void fastpath_read_update_header(STREAM* s, uint8* updateCode, uint8* fragmentation, uint8* compression)
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{
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uint8 updateHeader;
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stream_read_uint8(s, updateHeader);
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*updateCode = updateHeader & 0x0F;
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*fragmentation = (updateHeader >> 4) & 0x03;
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*compression = (updateHeader >> 6) & 0x03;
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}
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INLINE void fastpath_write_update_header(STREAM* s, uint8 updateCode, uint8 fragmentation, uint8 compression)
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{
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uint8 updateHeader = 0;
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updateHeader |= updateCode & 0x0F;
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updateHeader |= (fragmentation & 0x03) << 4;
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updateHeader |= (compression & 0x03) << 6;
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stream_write_uint8(s, updateHeader);
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}
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uint16 fastpath_read_header_rdp(rdpFastPath* fastpath, STREAM* s)
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{
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uint8 header;
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uint16 length;
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uint8 t;
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uint16 hs;
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hs = 2;
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stream_read_uint8(s, header);
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if (fastpath != NULL)
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{
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fastpath->encryptionFlags = (header & 0xC0) >> 6;
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fastpath->numberEvents = (header & 0x3C) >> 2;
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}
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stream_read_uint8(s, length); /* length1 */
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/* If most significant bit is not set, length2 is not presented. */
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if ((length & 0x80))
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{
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hs++;
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length &= 0x7F;
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length <<= 8;
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stream_read_uint8(s, t);
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length += t;
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}
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return length - hs;
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}
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boolean fastpath_read_security_header(rdpFastPath* fastpath, STREAM* s)
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{
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/* TODO: fipsInformation */
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if ((fastpath->encryptionFlags & FASTPATH_OUTPUT_ENCRYPTED))
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{
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stream_seek(s, 8); /* dataSignature */
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}
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return True;
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}
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static void fastpath_recv_orders(rdpFastPath* fastpath, STREAM* s)
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{
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rdpUpdate* update = fastpath->rdp->update;
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uint16 numberOrders;
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stream_read_uint16(s, numberOrders); /* numberOrders (2 bytes) */
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//printf("numberOrders(FastPath):%d\n", numberOrders);
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while (numberOrders > 0)
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{
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update_recv_order(update, s);
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numberOrders--;
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}
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}
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static void fastpath_recv_update_common(rdpFastPath* fastpath, STREAM* s)
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{
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rdpUpdate* update = fastpath->rdp->update;
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uint16 updateType;
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stream_read_uint16(s, updateType); /* updateType (2 bytes) */
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switch (updateType)
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{
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case UPDATE_TYPE_BITMAP:
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update_read_bitmap(update, s, &update->bitmap_update);
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IFCALL(update->Bitmap, update, &update->bitmap_update);
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break;
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case UPDATE_TYPE_PALETTE:
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update_read_palette(update, s, &update->palette_update);
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IFCALL(update->Palette, update, &update->palette_update);
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break;
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}
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}
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static void fastpath_recv_update(rdpFastPath* fastpath, uint8 updateCode, uint32 size, STREAM* s)
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{
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switch (updateCode)
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{
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case FASTPATH_UPDATETYPE_ORDERS:
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fastpath_recv_orders(fastpath, s);
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break;
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case FASTPATH_UPDATETYPE_BITMAP:
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case FASTPATH_UPDATETYPE_PALETTE:
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fastpath_recv_update_common(fastpath, s);
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break;
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case FASTPATH_UPDATETYPE_SYNCHRONIZE:
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IFCALL(fastpath->rdp->update->Synchronize, fastpath->rdp->update);
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break;
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case FASTPATH_UPDATETYPE_SURFCMDS:
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update_recv_surfcmds(fastpath->rdp->update, size, s);
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break;
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case FASTPATH_UPDATETYPE_PTR_NULL:
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//printf("FASTPATH_UPDATETYPE_PTR_NULL\n");
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break;
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case FASTPATH_UPDATETYPE_PTR_DEFAULT:
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//printf("FASTPATH_UPDATETYPE_PTR_DEFAULT\n");
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break;
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case FASTPATH_UPDATETYPE_PTR_POSITION:
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//printf("FASTPATH_UPDATETYPE_PTR_POSITION\n");
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break;
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case FASTPATH_UPDATETYPE_COLOR:
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//printf("FASTPATH_UPDATETYPE_COLOR\n");
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break;
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case FASTPATH_UPDATETYPE_CACHED:
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//printf("FASTPATH_UPDATETYPE_CACHED\n");
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break;
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case FASTPATH_UPDATETYPE_POINTER:
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//printf("FASTPATH_UPDATETYPE_POINTER\n");
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break;
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default:
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DEBUG_WARN("unknown updateCode 0x%X", updateCode);
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break;
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}
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}
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static void fastpath_recv_update_data(rdpFastPath* fastpath, STREAM* s)
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{
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uint16 size;
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int next_pos;
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uint32 totalSize;
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uint8 updateCode;
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uint8 fragmentation;
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uint8 compression;
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uint8 compressionFlags;
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STREAM* update_stream;
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STREAM* comp_stream;
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rdpRdp *rdp;
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uint32 roff;
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uint32 rlen;
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rdp = fastpath->rdp;
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fastpath_read_update_header(s, &updateCode, &fragmentation, &compression);
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if (compression == FASTPATH_OUTPUT_COMPRESSION_USED)
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stream_read_uint8(s, compressionFlags);
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else
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compressionFlags = 0;
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stream_read_uint16(s, size);
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next_pos = stream_get_pos(s) + size;
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comp_stream = s;
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if (compressionFlags & PACKET_COMPRESSED)
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{
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if (decompress_rdp(rdp, s->p, size, compressionFlags, &roff, &rlen))
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{
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comp_stream = stream_new(0);
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comp_stream->data = rdp->mppc->history_buf + roff;
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comp_stream->p = comp_stream->data;
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comp_stream->size = rlen;
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size = comp_stream->size;
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}
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else
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{
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printf("decompress_rdp() failed\n");
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stream_seek(s, size);
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}
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}
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update_stream = NULL;
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if (fragmentation == FASTPATH_FRAGMENT_SINGLE)
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{
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totalSize = size;
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update_stream = comp_stream;
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}
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else
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{
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if (fragmentation == FASTPATH_FRAGMENT_FIRST)
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stream_set_pos(fastpath->updateData, 0);
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stream_check_size(fastpath->updateData, size);
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stream_copy(fastpath->updateData, comp_stream, size);
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if (fragmentation == FASTPATH_FRAGMENT_LAST)
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{
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update_stream = fastpath->updateData;
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totalSize = stream_get_length(update_stream);
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stream_set_pos(update_stream, 0);
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}
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}
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if (update_stream)
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fastpath_recv_update(fastpath, updateCode, totalSize, update_stream);
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stream_set_pos(s, next_pos);
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if (comp_stream != s)
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xfree(comp_stream);
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}
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boolean fastpath_recv_updates(rdpFastPath* fastpath, STREAM* s)
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{
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rdpUpdate* update = fastpath->rdp->update;
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IFCALL(update->BeginPaint, update);
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while (stream_get_left(s) > 3)
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{
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fastpath_recv_update_data(fastpath, s);
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}
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IFCALL(update->EndPaint, update);
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return True;
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}
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static boolean fastpath_read_input_event_header(STREAM* s, uint8* eventFlags, uint8* eventCode)
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{
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uint8 eventHeader;
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if (stream_get_left(s) < 1)
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return False;
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stream_read_uint8(s, eventHeader); /* eventHeader (1 byte) */
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*eventFlags = (eventHeader & 0x1F);
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*eventCode = (eventHeader >> 5);
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return True;
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}
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static boolean fastpath_recv_input_event_scancode(rdpFastPath* fastpath, STREAM* s, uint8 eventFlags)
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{
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uint16 flags;
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uint16 code;
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if (stream_get_left(s) < 1)
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return False;
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stream_read_uint8(s, code); /* keyCode (1 byte) */
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flags = 0;
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if ((eventFlags & FASTPATH_INPUT_KBDFLAGS_RELEASE))
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flags |= KBD_FLAGS_RELEASE;
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else
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flags |= KBD_FLAGS_DOWN;
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if ((eventFlags & FASTPATH_INPUT_KBDFLAGS_EXTENDED))
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flags |= KBD_FLAGS_EXTENDED;
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IFCALL(fastpath->rdp->input->KeyboardEvent, fastpath->rdp->input, flags, code);
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return True;
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}
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static boolean fastpath_recv_input_event_mouse(rdpFastPath* fastpath, STREAM* s, uint8 eventFlags)
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{
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uint16 pointerFlags;
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uint16 xPos;
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uint16 yPos;
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if (stream_get_left(s) < 6)
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return False;
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stream_read_uint16(s, pointerFlags); /* pointerFlags (2 bytes) */
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stream_read_uint16(s, xPos); /* xPos (2 bytes) */
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stream_read_uint16(s, yPos); /* yPos (2 bytes) */
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IFCALL(fastpath->rdp->input->MouseEvent, fastpath->rdp->input, pointerFlags, xPos, yPos);
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return True;
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}
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static boolean fastpath_recv_input_event_mousex(rdpFastPath* fastpath, STREAM* s, uint8 eventFlags)
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{
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uint16 pointerFlags;
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uint16 xPos;
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uint16 yPos;
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if (stream_get_left(s) < 6)
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return False;
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stream_read_uint16(s, pointerFlags); /* pointerFlags (2 bytes) */
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stream_read_uint16(s, xPos); /* xPos (2 bytes) */
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stream_read_uint16(s, yPos); /* yPos (2 bytes) */
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IFCALL(fastpath->rdp->input->ExtendedMouseEvent, fastpath->rdp->input, pointerFlags, xPos, yPos);
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return True;
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}
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static boolean fastpath_recv_input_event_sync(rdpFastPath* fastpath, STREAM* s, uint8 eventFlags)
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{
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IFCALL(fastpath->rdp->input->SynchronizeEvent, fastpath->rdp->input, eventFlags);
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return True;
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}
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static boolean fastpath_recv_input_event_unicode(rdpFastPath* fastpath, STREAM* s, uint8 eventFlags)
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{
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uint16 unicodeCode;
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if (stream_get_left(s) < 2)
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return False;
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stream_read_uint16(s, unicodeCode); /* unicodeCode (2 bytes) */
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IFCALL(fastpath->rdp->input->UnicodeKeyboardEvent, fastpath->rdp->input, unicodeCode);
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return True;
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}
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static boolean fastpath_recv_input_event(rdpFastPath* fastpath, STREAM* s)
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{
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uint8 eventFlags;
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uint8 eventCode;
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if (!fastpath_read_input_event_header(s, &eventFlags, &eventCode))
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return False;
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switch (eventCode)
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{
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case FASTPATH_INPUT_EVENT_SCANCODE:
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if (!fastpath_recv_input_event_scancode(fastpath, s, eventFlags))
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return False;
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break;
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case FASTPATH_INPUT_EVENT_MOUSE:
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if (!fastpath_recv_input_event_mouse(fastpath, s, eventFlags))
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return False;
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break;
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case FASTPATH_INPUT_EVENT_MOUSEX:
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if (!fastpath_recv_input_event_mousex(fastpath, s, eventFlags))
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return False;
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break;
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case FASTPATH_INPUT_EVENT_SYNC:
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if (!fastpath_recv_input_event_sync(fastpath, s, eventFlags))
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return False;
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break;
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case FASTPATH_INPUT_EVENT_UNICODE:
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if (!fastpath_recv_input_event_unicode(fastpath, s, eventFlags))
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return False;
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break;
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default:
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printf("Unknown eventCode %d\n", eventCode);
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break;
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}
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return True;
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}
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boolean fastpath_recv_inputs(rdpFastPath* fastpath, STREAM* s)
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{
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uint8 i;
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if (fastpath->numberEvents == 0)
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{
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/**
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* If numberEvents is not provided in fpInputHeader, it will be provided
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* as one additional byte here.
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*/
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if (stream_get_left(s) < 1)
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return False;
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stream_read_uint8(s, fastpath->numberEvents); /* eventHeader (1 byte) */
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}
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for (i = 0; i < fastpath->numberEvents; i++)
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{
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if (!fastpath_recv_input_event(fastpath, s))
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return False;
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}
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return True;
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}
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STREAM* fastpath_input_pdu_init(rdpFastPath* fastpath, uint8 eventFlags, uint8 eventCode)
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{
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STREAM* s;
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s = transport_send_stream_init(fastpath->rdp->transport, 127);
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stream_seek(s, 2); /* fpInputHeader and length1 */
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/* length2 is not necessary since input PDU should not exceed 127 bytes */
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stream_write_uint8(s, eventFlags | (eventCode << 5)); /* eventHeader (1 byte) */
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return s;
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}
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boolean fastpath_send_input_pdu(rdpFastPath* fastpath, STREAM* s)
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{
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uint16 length;
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length = stream_get_length(s);
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if (length > 127)
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{
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printf("Maximum FastPath PDU length is 127\n");
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return False;
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}
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stream_set_pos(s, 0);
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stream_write_uint8(s, (1 << 2));
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stream_write_uint8(s, length);
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stream_set_pos(s, length);
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if (transport_write(fastpath->rdp->transport, s) < 0)
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return False;
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return True;
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}
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STREAM* fastpath_update_pdu_init(rdpFastPath* fastpath)
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{
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STREAM* s;
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s = transport_send_stream_init(fastpath->rdp->transport, FASTPATH_MAX_PACKET_SIZE);
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stream_seek(s, 3); /* fpOutputHeader, length1 and length2 */
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return s;
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}
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boolean fastpath_send_update_pdu(rdpFastPath* fastpath, STREAM* s)
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{
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uint16 length;
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length = stream_get_length(s);
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if (length > FASTPATH_MAX_PACKET_SIZE)
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{
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printf("Maximum FastPath Update PDU length is %d (actual:%d)\n", FASTPATH_MAX_PACKET_SIZE, length);
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return False;
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}
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stream_set_pos(s, 0);
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stream_write_uint8(s, 0); /* fpOutputHeader (1 byte) */
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stream_write_uint8(s, 0x80 | (length >> 8)); /* length1 */
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stream_write_uint8(s, length & 0xFF); /* length2 */
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stream_set_pos(s, length);
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if (transport_write(fastpath->rdp->transport, s) < 0)
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return False;
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return True;
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}
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boolean fastpath_send_fragmented_update_pdu(rdpFastPath* fastpath, STREAM* s)
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{
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int fragment;
|
|
uint16 length;
|
|
uint16 maxLength;
|
|
uint32 totalLength;
|
|
uint8 fragmentation;
|
|
STREAM* update;
|
|
|
|
maxLength = FASTPATH_MAX_PACKET_SIZE - 6;
|
|
totalLength = stream_get_length(s);
|
|
stream_set_pos(s, 0);
|
|
|
|
for (fragment = 0; totalLength > 0; fragment++)
|
|
{
|
|
update = fastpath_update_pdu_init(fastpath);
|
|
length = MIN(maxLength, totalLength);
|
|
totalLength -= length;
|
|
|
|
if (totalLength == 0)
|
|
fragmentation = (fragment == 0) ? FASTPATH_FRAGMENT_SINGLE : FASTPATH_FRAGMENT_LAST;
|
|
else
|
|
fragmentation = (fragment == 0) ? FASTPATH_FRAGMENT_FIRST : FASTPATH_FRAGMENT_NEXT;
|
|
|
|
fastpath_write_update_header(update, FASTPATH_UPDATETYPE_SURFCMDS, fragmentation, 0);
|
|
stream_write_uint16(update, length);
|
|
stream_write(update, s->p, length);
|
|
stream_seek(s, length);
|
|
|
|
fastpath_send_update_pdu(fastpath, update);
|
|
}
|
|
|
|
return True;
|
|
}
|
|
|
|
boolean fastpath_send_surfcmd_frame_marker(rdpFastPath* fastpath, uint16 frameAction, uint32 frameId)
|
|
{
|
|
STREAM* s;
|
|
s = transport_send_stream_init(fastpath->rdp->transport, 127);
|
|
stream_write_uint8(s, 0); /* fpOutputHeader (1 byte) */
|
|
stream_write_uint8(s, 5 + SURFCMD_FRAME_MARKER_LENGTH); /* length1 */
|
|
stream_write_uint8(s, FASTPATH_UPDATETYPE_SURFCMDS); /* updateHeader (1 byte) */
|
|
stream_write_uint16(s, SURFCMD_FRAME_MARKER_LENGTH); /* size (2 bytes) */
|
|
update_write_surfcmd_frame_marker(s, frameAction, frameId);
|
|
|
|
if (transport_write(fastpath->rdp->transport, s) < 0)
|
|
return False;
|
|
|
|
return True;
|
|
}
|
|
|
|
boolean fastpath_send_surfcmd_surface_bits(rdpFastPath* fastpath, SURFACE_BITS_COMMAND* cmd)
|
|
{
|
|
STREAM* s;
|
|
uint16 size;
|
|
uint8* bitmapData;
|
|
uint32 bitmapDataLength;
|
|
uint16 fragment_size;
|
|
uint8 fragmentation;
|
|
int i;
|
|
int bp, ep;
|
|
|
|
bitmapData = cmd->bitmapData;
|
|
bitmapDataLength = cmd->bitmapDataLength;
|
|
for (i = 0; bitmapDataLength > 0; i++)
|
|
{
|
|
s = fastpath_update_pdu_init(fastpath);
|
|
|
|
bp = stream_get_pos(s);
|
|
stream_seek_uint8(s); /* updateHeader (1 byte) */
|
|
stream_seek_uint16(s); /* size (2 bytes) */
|
|
size = 0;
|
|
|
|
if (i == 0)
|
|
{
|
|
update_write_surfcmd_surface_bits_header(s, cmd);
|
|
size += SURFCMD_SURFACE_BITS_HEADER_LENGTH;
|
|
}
|
|
|
|
fragment_size = MIN(FASTPATH_MAX_PACKET_SIZE - stream_get_length(s), bitmapDataLength);
|
|
|
|
if (fragment_size == bitmapDataLength)
|
|
fragmentation = (i == 0 ? FASTPATH_FRAGMENT_SINGLE : FASTPATH_FRAGMENT_LAST);
|
|
else
|
|
fragmentation = (i == 0 ? FASTPATH_FRAGMENT_FIRST : FASTPATH_FRAGMENT_NEXT);
|
|
|
|
size += fragment_size;
|
|
|
|
ep = stream_get_pos(s);
|
|
stream_set_pos(s, bp);
|
|
fastpath_write_update_header(s, FASTPATH_UPDATETYPE_SURFCMDS, fragmentation, 0);
|
|
stream_write_uint16(s, size);
|
|
stream_set_pos(s, ep);
|
|
|
|
stream_write(s, bitmapData, fragment_size);
|
|
bitmapData += fragment_size;
|
|
bitmapDataLength -= fragment_size;
|
|
|
|
if (!fastpath_send_update_pdu(fastpath, s))
|
|
return False;
|
|
}
|
|
|
|
return True;
|
|
}
|
|
|
|
rdpFastPath* fastpath_new(rdpRdp* rdp)
|
|
{
|
|
rdpFastPath* fastpath;
|
|
|
|
fastpath = xnew(rdpFastPath);
|
|
fastpath->rdp = rdp;
|
|
fastpath->updateData = stream_new(4096);
|
|
|
|
return fastpath;
|
|
}
|
|
|
|
void fastpath_free(rdpFastPath* fastpath)
|
|
{
|
|
stream_free(fastpath->updateData);
|
|
xfree(fastpath);
|
|
}
|