mirror of https://github.com/FreeRDP/FreeRDP
466 lines
11 KiB
C
466 lines
11 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Client
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* RDP Core
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*
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* Copyright 2011 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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#include "rdp.h"
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uint8 DATA_PDU_TYPE_STRINGS[][32] =
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{
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"", "", /* 0x00 - 0x01 */
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"Update", /* 0x02 */
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"", "", "", "", "", "", "", "", /* 0x03 - 0x0A */
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"", "", "", "", "", "", "", "", "", /* 0x0B - 0x13 */
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"Control", /* 0x14 */
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"", "", "", "", "", "", /* 0x15 - 0x1A */
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"Pointer", /* 0x1B */
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"Input", /* 0x1C */
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"", "", /* 0x1D - 0x1E */
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"Synchronize", /* 0x1F */
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"", /* 0x20 */
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"Refresh Rect", /* 0x21 */
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"Play Sound", /* 0x22 */
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"Suppress Output", /* 0x23 */
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"Shutdown Request", /* 0x24 */
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"Shutdown Denied", /* 0x25 */
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"Save Session Info", /* 0x26 */
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"Font List", /* 0x27 */
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"Font Map", /* 0x28 */
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"Set Keyboard Indicators", /* 0x29 */
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"", /* 0x2A */
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"Bitmap Cache Persistent List", /* 0x2B */
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"Bitmap Cache Error", /* 0x2C */
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"Set Keyboard IME Status", /* 0x2D */
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"Offscreen Cache Error", /* 0x2E */
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"Set Error Info", /* 0x2F */
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"Draw Nine Grid Error", /* 0x30 */
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"Draw GDI+ Error", /* 0x31 */
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"ARC Status", /* 0x32 */
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"", "", "", /* 0x33 - 0x35 */
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"Status Info", /* 0x36 */
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"Monitor Layout" /* 0x37 */
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"", "", "", /* 0x38 - 0x40 */
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"", "", "", "", "", "" /* 0x41 - 0x46 */
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};
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/**
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* Read RDP Security Header.\n
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* @msdn{cc240579}
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* @param s stream
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* @param flags security flags
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*/
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void rdp_read_security_header(STREAM* s, uint16* flags)
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{
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/* Basic Security Header */
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stream_read_uint16(s, *flags); /* flags */
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stream_seek(s, 2); /* flagsHi (unused) */
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}
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/**
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* Write RDP Security Header.\n
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* @msdn{cc240579}
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* @param s stream
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* @param flags security flags
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*/
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void rdp_write_security_header(STREAM* s, uint16 flags)
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{
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/* Basic Security Header */
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stream_write_uint16(s, flags); /* flags */
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stream_write_uint16(s, 0); /* flagsHi (unused) */
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}
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void rdp_read_share_control_header(STREAM* s, uint16* length, uint16* type, uint16* channel_id)
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{
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/* Share Control Header */
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stream_read_uint16(s, *length); /* totalLength */
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stream_read_uint16(s, *type); /* pduType */
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stream_read_uint16(s, *channel_id); /* pduSource */
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*type &= 0x0F; /* type is in the 4 least significant bits */
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}
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void rdp_write_share_control_header(STREAM* s, uint16 length, uint16 type, uint16 channel_id)
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{
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length -= RDP_PACKET_HEADER_LENGTH;
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/* Share Control Header */
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stream_write_uint16(s, length); /* totalLength */
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stream_write_uint16(s, type | 0x10); /* pduType */
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stream_write_uint16(s, channel_id); /* pduSource */
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}
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void rdp_read_share_data_header(STREAM* s, uint16* length, uint8* type, uint32* share_id)
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{
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/* Share Data Header */
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stream_read_uint32(s, *share_id); /* shareId (4 bytes) */
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stream_seek_uint8(s); /* pad1 (1 byte) */
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stream_seek_uint8(s); /* streamId (1 byte) */
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stream_read_uint16(s, *length); /* uncompressedLength (2 bytes) */
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stream_read_uint8(s, *type); /* pduType2, Data PDU Type (1 byte) */
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stream_seek_uint8(s); /* compressedType (1 byte) */
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stream_seek_uint16(s); /* compressedLength (2 bytes) */
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}
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void rdp_write_share_data_header(STREAM* s, uint16 length, uint8 type, uint32 share_id)
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{
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length -= RDP_PACKET_HEADER_LENGTH;
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length -= RDP_SHARE_CONTROL_HEADER_LENGTH;
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length -= RDP_SHARE_DATA_HEADER_LENGTH;
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/* Share Data Header */
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stream_write_uint32(s, share_id); /* shareId (4 bytes) */
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stream_write_uint8(s, 0); /* pad1 (1 byte) */
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stream_write_uint8(s, STREAM_LOW); /* streamId (1 byte) */
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stream_write_uint16(s, length); /* uncompressedLength (2 bytes) */
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stream_write_uint8(s, type); /* pduType2, Data PDU Type (1 byte) */
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stream_write_uint8(s, 0); /* compressedType (1 byte) */
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stream_write_uint16(s, 0); /* compressedLength (2 bytes) */
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}
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/**
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* Initialize an RDP packet stream.\n
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* @param rdp rdp module
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* @return
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*/
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STREAM* rdp_send_stream_init(rdpRdp* rdp)
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{
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STREAM* s;
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s = transport_send_stream_init(rdp->transport, 2048);
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stream_seek(s, RDP_PACKET_HEADER_LENGTH);
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return s;
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}
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STREAM* rdp_pdu_init(rdpRdp* rdp)
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{
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STREAM* s;
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s = transport_send_stream_init(rdp->transport, 2048);
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stream_seek(s, RDP_PACKET_HEADER_LENGTH);
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stream_seek(s, RDP_SHARE_CONTROL_HEADER_LENGTH);
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return s;
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}
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STREAM* rdp_data_pdu_init(rdpRdp* rdp)
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{
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STREAM* s;
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s = transport_send_stream_init(rdp->transport, 2048);
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stream_seek(s, RDP_PACKET_HEADER_LENGTH);
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stream_seek(s, RDP_SHARE_CONTROL_HEADER_LENGTH);
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stream_seek(s, RDP_SHARE_DATA_HEADER_LENGTH);
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return s;
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}
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/**
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* Write an RDP packet header.\n
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* @param rdp rdp module
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* @param s stream
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* @param length RDP packet length
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*/
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void rdp_write_header(rdpRdp* rdp, STREAM* s, int length)
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{
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mcs_write_domain_mcspdu_header(s, DomainMCSPDU_SendDataRequest, length);
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per_write_integer16(s, rdp->mcs->user_id, MCS_BASE_CHANNEL_ID); /* initiator */
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per_write_integer16(s, MCS_GLOBAL_CHANNEL_ID, 0); /* channelId */
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stream_write_uint8(s, 0x70); /* dataPriority + segmentation */
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length = (length - RDP_PACKET_HEADER_LENGTH) | 0x8000;
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stream_write_uint16_be(s, length); /* userData (OCTET_STRING) */
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}
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/**
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* Send an RDP packet.\n
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* @param rdp RDP module
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* @param s stream
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*/
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void rdp_send(rdpRdp* rdp, STREAM* s)
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{
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int length;
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length = stream_get_length(s);
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stream_set_pos(s, 0);
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rdp_write_header(rdp, s, length);
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stream_set_pos(s, length);
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transport_write(rdp->transport, s);
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}
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void rdp_send_pdu(rdpRdp* rdp, STREAM* s, uint16 type, uint16 channel_id)
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{
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int length;
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length = stream_get_length(s);
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stream_set_pos(s, 0);
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rdp_write_header(rdp, s, length);
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rdp_write_share_control_header(s, length, type, channel_id);
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stream_set_pos(s, length);
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transport_write(rdp->transport, s);
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}
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void rdp_send_data_pdu(rdpRdp* rdp, STREAM* s, uint16 type, uint16 channel_id)
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{
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int length;
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length = stream_get_length(s);
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stream_set_pos(s, 0);
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rdp_write_header(rdp, s, length);
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rdp_write_share_control_header(s, length, PDU_TYPE_DATA, channel_id);
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rdp_write_share_data_header(s, length, type, rdp->settings->share_id);
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printf("send %s Data PDU (0x%02X), length:%d\n", DATA_PDU_TYPE_STRINGS[type], type, length);
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stream_set_pos(s, length);
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transport_write(rdp->transport, s);
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}
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void rdp_read_set_error_info_data_pdu(STREAM* s)
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{
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uint32 errorInfo;
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stream_read_uint32(s, errorInfo); /* errorInfo (4 bytes) */
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if (errorInfo != 0)
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printf("Error Info: 0x%08X\n", errorInfo);
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}
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void rdp_read_data_pdu(rdpRdp* rdp, STREAM* s)
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{
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uint8 type;
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uint16 length;
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uint32 share_id;
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rdp_read_share_data_header(s, &length, &type, &share_id);
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if (type != DATA_PDU_TYPE_UPDATE)
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printf("recv %s Data PDU (0x%02X), length:%d\n", DATA_PDU_TYPE_STRINGS[type], type, length);
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switch (type)
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{
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case DATA_PDU_TYPE_UPDATE:
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rdp_recv_update_data_pdu(rdp, s);
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break;
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case DATA_PDU_TYPE_CONTROL:
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rdp_recv_server_control_pdu(rdp, s, rdp->settings);
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break;
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case DATA_PDU_TYPE_POINTER:
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break;
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case DATA_PDU_TYPE_INPUT:
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break;
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case DATA_PDU_TYPE_SYNCHRONIZE:
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rdp_recv_server_synchronize_pdu(rdp, s, rdp->settings);
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break;
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case DATA_PDU_TYPE_REFRESH_RECT:
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break;
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case DATA_PDU_TYPE_PLAY_SOUND:
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break;
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case DATA_PDU_TYPE_SUPPRESS_OUTPUT:
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break;
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case DATA_PDU_TYPE_SHUTDOWN_REQUEST:
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break;
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case DATA_PDU_TYPE_SHUTDOWN_DENIED:
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break;
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case DATA_PDU_TYPE_SAVE_SESSION_INFO:
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rdp_recv_save_session_info(rdp, s);
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break;
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case DATA_PDU_TYPE_FONT_LIST:
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break;
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case DATA_PDU_TYPE_FONT_MAP:
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rdp_recv_server_font_map_pdu(rdp, s, rdp->settings);
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break;
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case DATA_PDU_TYPE_SET_KEYBOARD_INDICATORS:
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break;
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case DATA_PDU_TYPE_BITMAP_CACHE_PERSISTENT_LIST:
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break;
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case DATA_PDU_TYPE_BITMAP_CACHE_ERROR:
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break;
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case DATA_PDU_TYPE_SET_KEYBOARD_IME_STATUS:
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break;
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case DATA_PDU_TYPE_OFFSCREEN_CACHE_ERROR:
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break;
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case DATA_PDU_TYPE_SET_ERROR_INFO:
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rdp_read_set_error_info_data_pdu(s);
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break;
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case DATA_PDU_TYPE_DRAW_NINEGRID_ERROR:
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break;
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case DATA_PDU_TYPE_DRAW_GDIPLUS_ERROR:
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break;
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case DATA_PDU_TYPE_ARC_STATUS:
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break;
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case DATA_PDU_TYPE_STATUS_INFO:
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break;
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case DATA_PDU_TYPE_MONITOR_LAYOUT:
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break;
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default:
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break;
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}
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}
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/**
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* Receive an RDP packet.\n
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* @param rdp RDP module
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*/
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void rdp_recv(rdpRdp* rdp)
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{
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STREAM* s;
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int length;
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uint16 pduType;
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uint16 pduLength;
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uint16 initiator;
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uint16 channelId;
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uint16 sec_flags;
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enum DomainMCSPDU MCSPDU;
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s = transport_recv_stream_init(rdp->transport, 4096);
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transport_read(rdp->transport, s);
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MCSPDU = DomainMCSPDU_SendDataIndication;
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mcs_read_domain_mcspdu_header(s, &MCSPDU, &length);
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per_read_integer16(s, &initiator, MCS_BASE_CHANNEL_ID); /* initiator (UserId) */
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per_read_integer16(s, &channelId, 0); /* channelId */
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stream_seek(s, 1); /* dataPriority + Segmentation (0x70) */
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per_read_length(s, &pduLength); /* userData (OCTET_STRING) */
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if (rdp->licensed != True)
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{
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rdp_read_security_header(s, &sec_flags);
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if (sec_flags & SEC_PKT_MASK)
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{
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switch (sec_flags & SEC_PKT_MASK)
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{
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case SEC_LICENSE_PKT:
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license_recv(rdp->license, s);
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break;
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case SEC_REDIRECTION_PKT:
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rdp_read_redirection_packet(rdp, s);
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break;
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default:
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//printf("incorrect security flags: 0x%04X\n", sec_flags);
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break;
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}
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}
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}
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else
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{
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rdp_read_share_control_header(s, &pduLength, &pduType, &rdp->settings->pdu_source);
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switch (pduType)
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{
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case PDU_TYPE_DATA:
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rdp_read_data_pdu(rdp, s);
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break;
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case PDU_TYPE_DEMAND_ACTIVE:
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rdp_recv_demand_active(rdp, s, rdp->settings);
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break;
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case PDU_TYPE_DEACTIVATE_ALL:
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rdp_recv_deactivate_all(rdp, s);
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break;
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case PDU_TYPE_SERVER_REDIRECTION:
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rdp_read_enhanced_security_redirection_packet(rdp, s);
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break;
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default:
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printf("incorrect PDU type: 0x%04X\n", pduType);
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break;
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}
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}
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}
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/**
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* Instantiate new RDP module.
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* @return new RDP module
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*/
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rdpRdp* rdp_new()
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{
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rdpRdp* rdp;
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rdp = (rdpRdp*) xzalloc(sizeof(rdpRdp));
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if (rdp != NULL)
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{
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rdp->licensed = False;
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rdp->settings = settings_new();
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rdp->registry = registry_new(rdp->settings);
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rdp->transport = transport_new(rdp->settings);
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rdp->license = license_new(rdp);
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rdp->orders = orders_new();
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rdp->update = update_new();
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rdp->nego = nego_new(rdp->transport);
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rdp->mcs = mcs_new(rdp->transport);
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}
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return rdp;
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}
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/**
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* Free RDP module.
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* @param rdp RDP module to be freed
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*/
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void rdp_free(rdpRdp* rdp)
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{
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if (rdp != NULL)
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{
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settings_free(rdp->settings);
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transport_free(rdp->transport);
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license_free(rdp->license);
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orders_free(rdp->orders);
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update_free(rdp->update);
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mcs_free(rdp->mcs);
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xfree(rdp);
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}
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}
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