FreeRDP/libfreerdp/core/input.c

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/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* Input PDUs
*
* Copyright 2011 Marc-Andre Moreau <marcandre.moreau@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
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#include <freerdp/input.h>
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#include "input.h"
void rdp_write_client_input_pdu_header(STREAM* s, UINT16 number)
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{
stream_write_UINT16(s, 1); /* numberEvents (2 bytes) */
stream_write_UINT16(s, 0); /* pad2Octets (2 bytes) */
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}
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void rdp_write_input_event_header(STREAM* s, UINT32 time, UINT16 type)
{
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stream_write_UINT32(s, time); /* eventTime (4 bytes) */
stream_write_UINT16(s, type); /* messageType (2 bytes) */
}
STREAM* rdp_client_input_pdu_init(rdpRdp* rdp, UINT16 type)
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{
STREAM* s;
s = rdp_data_pdu_init(rdp);
rdp_write_client_input_pdu_header(s, 1);
rdp_write_input_event_header(s, 0, type);
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return s;
}
void rdp_send_client_input_pdu(rdpRdp* rdp, STREAM* s)
{
rdp_send_data_pdu(rdp, s, DATA_PDU_TYPE_INPUT, rdp->mcs->user_id);
}
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void input_write_synchronize_event(STREAM* s, UINT32 flags)
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{
stream_write_UINT16(s, 0); /* pad2Octets (2 bytes) */
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stream_write_UINT32(s, flags); /* toggleFlags (4 bytes) */
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}
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void input_send_synchronize_event(rdpInput* input, UINT32 flags)
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{
STREAM* s;
rdpRdp* rdp = input->context->rdp;
s = rdp_client_input_pdu_init(rdp, INPUT_EVENT_SYNC);
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input_write_synchronize_event(s, flags);
rdp_send_client_input_pdu(rdp, s);
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}
void input_write_keyboard_event(STREAM* s, UINT16 flags, UINT16 code)
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{
stream_write_UINT16(s, flags); /* keyboardFlags (2 bytes) */
stream_write_UINT16(s, code); /* keyCode (2 bytes) */
stream_write_UINT16(s, 0); /* pad2Octets (2 bytes) */
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}
void input_send_keyboard_event(rdpInput* input, UINT16 flags, UINT16 code)
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{
STREAM* s;
rdpRdp* rdp = input->context->rdp;
s = rdp_client_input_pdu_init(rdp, INPUT_EVENT_SCANCODE);
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input_write_keyboard_event(s, flags, code);
rdp_send_client_input_pdu(rdp, s);
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}
void input_write_unicode_keyboard_event(STREAM* s, UINT16 flags, UINT16 code)
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{
stream_write_UINT16(s, flags); /* keyboardFlags (2 bytes) */
stream_write_UINT16(s, code); /* unicodeCode (2 bytes) */
stream_write_UINT16(s, 0); /* pad2Octets (2 bytes) */
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}
void input_send_unicode_keyboard_event(rdpInput* input, UINT16 flags, UINT16 code)
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{
STREAM* s;
UINT16 keyboardFlags = 0;
rdpRdp* rdp = input->context->rdp;
/*
* According to the specification, the slow path Unicode Keyboard Event
* (TS_UNICODE_KEYBOARD_EVENT) contains KBD_FLAGS_RELEASE flag when key
* is released, but contains no flags when it is pressed.
* This is different from the slow path Keyboard Event
* (TS_KEYBOARD_EVENT) which does contain KBD_FLAGS_DOWN flag when the
* key is pressed.
* There is no KBD_FLAGS_EXTENDED flag in TS_UNICODE_KEYBOARD_EVENT.
*/
keyboardFlags |= (flags & KBD_FLAGS_RELEASE) ? KBD_FLAGS_RELEASE : 0;
s = rdp_client_input_pdu_init(rdp, INPUT_EVENT_UNICODE);
input_write_unicode_keyboard_event(s, flags, code);
rdp_send_client_input_pdu(rdp, s);
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}
void input_write_mouse_event(STREAM* s, UINT16 flags, UINT16 x, UINT16 y)
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{
stream_write_UINT16(s, flags); /* pointerFlags (2 bytes) */
stream_write_UINT16(s, x); /* xPos (2 bytes) */
stream_write_UINT16(s, y); /* yPos (2 bytes) */
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}
void input_send_mouse_event(rdpInput* input, UINT16 flags, UINT16 x, UINT16 y)
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{
STREAM* s;
rdpRdp* rdp = input->context->rdp;
s = rdp_client_input_pdu_init(rdp, INPUT_EVENT_MOUSE);
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input_write_mouse_event(s, flags, x, y);
rdp_send_client_input_pdu(rdp, s);
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}
void input_write_extended_mouse_event(STREAM* s, UINT16 flags, UINT16 x, UINT16 y)
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{
stream_write_UINT16(s, flags); /* pointerFlags (2 bytes) */
stream_write_UINT16(s, x); /* xPos (2 bytes) */
stream_write_UINT16(s, y); /* yPos (2 bytes) */
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}
void input_send_extended_mouse_event(rdpInput* input, UINT16 flags, UINT16 x, UINT16 y)
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{
STREAM* s;
rdpRdp* rdp = input->context->rdp;
s = rdp_client_input_pdu_init(rdp, INPUT_EVENT_MOUSEX);
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input_write_extended_mouse_event(s, flags, x, y);
rdp_send_client_input_pdu(rdp, s);
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}
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void input_send_fastpath_synchronize_event(rdpInput* input, UINT32 flags)
{
STREAM* s;
rdpRdp* rdp = input->context->rdp;
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/* The FastPath Synchronization eventFlags has identical values as SlowPath */
s = fastpath_input_pdu_init(rdp->fastpath, (BYTE) flags, FASTPATH_INPUT_EVENT_SYNC);
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fastpath_send_input_pdu(rdp->fastpath, s);
}
void input_send_fastpath_keyboard_event(rdpInput* input, UINT16 flags, UINT16 code)
{
STREAM* s;
BYTE eventFlags = 0;
rdpRdp* rdp = input->context->rdp;
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eventFlags |= (flags & KBD_FLAGS_RELEASE) ? FASTPATH_INPUT_KBDFLAGS_RELEASE : 0;
eventFlags |= (flags & KBD_FLAGS_EXTENDED) ? FASTPATH_INPUT_KBDFLAGS_EXTENDED : 0;
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s = fastpath_input_pdu_init(rdp->fastpath, eventFlags, FASTPATH_INPUT_EVENT_SCANCODE);
stream_write_BYTE(s, code); /* keyCode (1 byte) */
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fastpath_send_input_pdu(rdp->fastpath, s);
}
void input_send_fastpath_unicode_keyboard_event(rdpInput* input, UINT16 flags, UINT16 code)
{
STREAM* s;
BYTE eventFlags = 0;
rdpRdp* rdp = input->context->rdp;
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eventFlags |= (flags & KBD_FLAGS_RELEASE) ? FASTPATH_INPUT_KBDFLAGS_RELEASE : 0;
s = fastpath_input_pdu_init(rdp->fastpath, eventFlags, FASTPATH_INPUT_EVENT_UNICODE);
stream_write_UINT16(s, code); /* unicodeCode (2 bytes) */
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fastpath_send_input_pdu(rdp->fastpath, s);
}
void input_send_fastpath_mouse_event(rdpInput* input, UINT16 flags, UINT16 x, UINT16 y)
{
STREAM* s;
rdpRdp* rdp = input->context->rdp;
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s = fastpath_input_pdu_init(rdp->fastpath, 0, FASTPATH_INPUT_EVENT_MOUSE);
input_write_mouse_event(s, flags, x, y);
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fastpath_send_input_pdu(rdp->fastpath, s);
}
void input_send_fastpath_extended_mouse_event(rdpInput* input, UINT16 flags, UINT16 x, UINT16 y)
{
STREAM* s;
rdpRdp* rdp = input->context->rdp;
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s = fastpath_input_pdu_init(rdp->fastpath, 0, FASTPATH_INPUT_EVENT_MOUSEX);
input_write_extended_mouse_event(s, flags, x, y);
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fastpath_send_input_pdu(rdp->fastpath, s);
}
static BOOL input_recv_sync_event(rdpInput* input, STREAM* s)
{
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UINT32 toggleFlags;
if (stream_get_left(s) < 6)
return FALSE;
stream_seek(s, 2); /* pad2Octets (2 bytes) */
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stream_read_UINT32(s, toggleFlags); /* toggleFlags (4 bytes) */
IFCALL(input->SynchronizeEvent, input, toggleFlags);
return TRUE;
}
static BOOL input_recv_keyboard_event(rdpInput* input, STREAM* s)
{
UINT16 keyboardFlags, keyCode;
if (stream_get_left(s) < 6)
return FALSE;
stream_read_UINT16(s, keyboardFlags); /* keyboardFlags (2 bytes) */
stream_read_UINT16(s, keyCode); /* keyCode (2 bytes) */
stream_seek(s, 2); /* pad2Octets (2 bytes) */
IFCALL(input->KeyboardEvent, input, keyboardFlags, keyCode);
return TRUE;
}
static BOOL input_recv_unicode_keyboard_event(rdpInput* input, STREAM* s)
{
UINT16 keyboardFlags, unicodeCode;
if (stream_get_left(s) < 6)
return FALSE;
stream_read_UINT16(s, keyboardFlags); /* keyboardFlags (2 bytes) */
stream_read_UINT16(s, unicodeCode); /* unicodeCode (2 bytes) */
stream_seek(s, 2); /* pad2Octets (2 bytes) */
/*
* According to the specification, the slow path Unicode Keyboard Event
* (TS_UNICODE_KEYBOARD_EVENT) contains KBD_FLAGS_RELEASE flag when key
* is released, but contains no flags when it is pressed.
* This is different from the slow path Keyboard Event
* (TS_KEYBOARD_EVENT) which does contain KBD_FLAGS_DOWN flag when the
* key is pressed.
* Set the KBD_FLAGS_DOWN flag if the KBD_FLAGS_RELEASE flag is missing.
*/
if ((keyboardFlags & KBD_FLAGS_RELEASE) == 0)
keyboardFlags |= KBD_FLAGS_DOWN;
IFCALL(input->UnicodeKeyboardEvent, input, keyboardFlags, unicodeCode);
return TRUE;
}
static BOOL input_recv_mouse_event(rdpInput* input, STREAM* s)
{
UINT16 pointerFlags, xPos, yPos;
if (stream_get_left(s) < 6)
return FALSE;
stream_read_UINT16(s, pointerFlags); /* pointerFlags (2 bytes) */
stream_read_UINT16(s, xPos); /* xPos (2 bytes) */
stream_read_UINT16(s, yPos); /* yPos (2 bytes) */
IFCALL(input->MouseEvent, input, pointerFlags, xPos, yPos);
return TRUE;
}
static BOOL input_recv_extended_mouse_event(rdpInput* input, STREAM* s)
{
UINT16 pointerFlags, xPos, yPos;
if (stream_get_left(s) < 6)
return FALSE;
stream_read_UINT16(s, pointerFlags); /* pointerFlags (2 bytes) */
stream_read_UINT16(s, xPos); /* xPos (2 bytes) */
stream_read_UINT16(s, yPos); /* yPos (2 bytes) */
IFCALL(input->ExtendedMouseEvent, input, pointerFlags, xPos, yPos);
return TRUE;
}
static BOOL input_recv_event(rdpInput* input, STREAM* s)
{
UINT16 messageType;
if (stream_get_left(s) < 4)
return FALSE;
stream_seek(s, 4); /* eventTime (4 bytes), ignored by the server */
stream_read_UINT16(s, messageType); /* messageType (2 bytes) */
switch (messageType)
{
case INPUT_EVENT_SYNC:
if (!input_recv_sync_event(input, s))
return FALSE;
break;
case INPUT_EVENT_SCANCODE:
if (!input_recv_keyboard_event(input, s))
return FALSE;
break;
case INPUT_EVENT_UNICODE:
if (!input_recv_unicode_keyboard_event(input, s))
return FALSE;
break;
case INPUT_EVENT_MOUSE:
if (!input_recv_mouse_event(input, s))
return FALSE;
break;
case INPUT_EVENT_MOUSEX:
if (!input_recv_extended_mouse_event(input, s))
return FALSE;
break;
default:
printf("Unknown messageType %u\n", messageType);
/* Each input event uses 6 bytes. */
stream_seek(s, 6);
break;
}
return TRUE;
}
BOOL input_recv(rdpInput* input, STREAM* s)
{
UINT16 i, numberEvents;
if (stream_get_left(s) < 4)
return FALSE;
stream_read_UINT16(s, numberEvents); /* numberEvents (2 bytes) */
stream_seek(s, 2); /* pad2Octets (2 bytes) */
/* Each input event uses 6 exactly bytes. */
if (stream_get_left(s) < 6 * numberEvents)
return FALSE;
for (i = 0; i < numberEvents; i++)
{
if (!input_recv_event(input, s))
return FALSE;
}
return TRUE;
}
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void input_register_client_callbacks(rdpInput* input)
{
rdpRdp* rdp = input->context->rdp;
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if (rdp->settings->FastPathInput)
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{
input->SynchronizeEvent = input_send_fastpath_synchronize_event;
input->KeyboardEvent = input_send_fastpath_keyboard_event;
input->UnicodeKeyboardEvent = input_send_fastpath_unicode_keyboard_event;
input->MouseEvent = input_send_fastpath_mouse_event;
input->ExtendedMouseEvent = input_send_fastpath_extended_mouse_event;
}
else
{
input->SynchronizeEvent = input_send_synchronize_event;
input->KeyboardEvent = input_send_keyboard_event;
input->UnicodeKeyboardEvent = input_send_unicode_keyboard_event;
input->MouseEvent = input_send_mouse_event;
input->ExtendedMouseEvent = input_send_extended_mouse_event;
}
}
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void freerdp_input_send_synchronize_event(rdpInput* input, UINT32 flags)
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{
IFCALL(input->SynchronizeEvent, input, flags);
}
void freerdp_input_send_keyboard_event(rdpInput* input, UINT16 flags, UINT16 code)
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{
IFCALL(input->KeyboardEvent, input, flags, code);
}
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void freerdp_input_send_keyboard_event_ex(rdpInput* input, BOOL down, UINT32 rdp_scancode)
{
freerdp_input_send_keyboard_event(input,
(RDP_SCANCODE_EXTENDED(rdp_scancode) ? KBD_FLAGS_EXTENDED : 0) |
((down) ? KBD_FLAGS_DOWN : KBD_FLAGS_RELEASE),
RDP_SCANCODE_CODE(rdp_scancode));
}
void freerdp_input_send_unicode_keyboard_event(rdpInput* input, UINT16 flags, UINT16 code)
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{
IFCALL(input->UnicodeKeyboardEvent, input, flags, code);
}
void freerdp_input_send_mouse_event(rdpInput* input, UINT16 flags, UINT16 x, UINT16 y)
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{
IFCALL(input->MouseEvent, input, flags, x, y);
}
void freerdp_input_send_extended_mouse_event(rdpInput* input, UINT16 flags, UINT16 x, UINT16 y)
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{
IFCALL(input->ExtendedMouseEvent, input, flags, x, y);
}
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rdpInput* input_new(rdpRdp* rdp)
{
rdpInput* input;
input = (rdpInput*) xzalloc(sizeof(rdpInput));
if (input != NULL)
{
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}
return input;
}
void input_free(rdpInput* input)
{
if (input != NULL)
{
free(input);
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}
}