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micro client.

This commit is contained in:
Nick Bolton 2012-07-04 19:36:49 +00:00
parent bab317931b
commit 58c5a1d84d
8 changed files with 1261 additions and 0 deletions
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1
src/CMakeLists.txt
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@ -17,6 +17,7 @@ add_subdirectory(lib)
add_subdirectory(cmd) add_subdirectory(cmd)
add_subdirectory(test) add_subdirectory(test)
add_subdirectory(plugin) add_subdirectory(plugin)
add_subdirectory(micro)
if (VNC_SUPPORT) if (VNC_SUPPORT)
add_subdirectory(vnc) add_subdirectory(vnc)

1
src/cmd/CMakeLists.txt
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@ -16,3 +16,4 @@
add_subdirectory(synergyc) add_subdirectory(synergyc)
add_subdirectory(synergys) add_subdirectory(synergys)
add_subdirectory(synergyd) add_subdirectory(synergyd)
add_subdirectory(usynergy)

24
src/cmd/usynergy/CMakeLists.txt Normal file
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@ -0,0 +1,24 @@
# synergy -- mouse and keyboard sharing utility
# Copyright (C) 2012 Nick Bolton
#
# This package is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# found in the file COPYING that should have accompanied this file.
#
# This package is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
if (WIN32)
set(src uSynergyWin32.c)
elseif (UNIX)
set(src uSynergyUnix.c)
endif()
include_directories(../../micro)
add_executable(usynergy ${src})
target_link_libraries(usynergy micro)

37
src/cmd/usynergy/uSynergyUnix.c Normal file
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@ -0,0 +1,37 @@
/*
uSynergy client -- Implementation for the embedded Synergy client library
version 1.0.0, July 7th, 2012
Copyright (c) 2012 Nick Bolton
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.
*/
#include "uSynergy.h"
// TODO: implement callbacks.
int main(char* argv, int argc) {
uSynergyContext* context = malloc(sizeof(uSynergyContext));
uSynergyInit(context);
for(;;) {
uSynergyUpdate(context);
}
}

141
src/cmd/usynergy/uSynergyWin32.c Normal file
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@ -0,0 +1,141 @@
/*
uSynergy client -- Implementation for the embedded Synergy client library
version 1.0.0, July 7th, 2012
Copyright (c) 2012 Nick Bolton
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.
*/
#include "uSynergy.h"
#include <stdlib.h>
#include <stdio.h>
#define WIN32_LEAN_AND_MEAN
#include <Windows.h>
uSynergyBool connect(uSynergyCookie cookie);
uSynergyBool send(uSynergyCookie cookie, const uint8_t *buffer, int length);
uSynergyBool receive(uSynergyCookie cookie, uint8_t *buffer, int maxLength, int* outLength);
void sleep(uSynergyCookie cookie, int timeMs);
uint32_t getTime();
void trace(uSynergyCookie cookie, const char *text);
void screenActive(uSynergyCookie cookie, uSynergyBool active);
void mouse(uSynergyCookie cookie, uint16_t x, uint16_t y, int16_t wheelX,
int16_t wheelY, uSynergyBool buttonLeft, uSynergyBool buttonRight,
uSynergyBool buttonMiddle);
void keyboard(uSynergyCookie cookie, uint16_t key, uSynergyBool down,
uSynergyBool repeat);
void joystick(uSynergyCookie cookie, uint8_t joyNum, uint16_t buttons,
int8_t leftStickX, int8_t leftStickY, int8_t rightStickX,
int8_t rightStickY);
void clipboard(uSynergyCookie cookie, enum uSynergyClipboardFormat format,
const uint8_t *data, uint32_t size);
// TODO: implement callbacks.
int main(char* argv, int argc)
{
uSynergyContext context;
uSynergyInit(&context);
context.m_connectFunc = &connect;
context.m_sendFunc = &send;
context.m_receiveFunc = &receive;
context.m_sleepFunc = &sleep;
context.m_getTimeFunc = &getTime;
context.m_traceFunc = &trace;
context.m_screenActiveCallback = &screenActive;
context.m_mouseCallback = &mouse;
context.m_keyboardCallback = &keyboard;
context.m_joystickCallback = &joystick;
context.m_clipboardCallback = &clipboard;
for(;;) {
uSynergyUpdate(&context);
}
}
uSynergyBool connect(uSynergyCookie cookie)
{
printf("connect\n");
return USYNERGY_TRUE;
}
uSynergyBool send(uSynergyCookie cookie, const uint8_t *buffer, int length)
{
printf("send\n");
return USYNERGY_TRUE;
}
uSynergyBool receive(uSynergyCookie cookie, uint8_t *buffer, int maxLength, int* outLength)
{
printf("receive\n");
return USYNERGY_TRUE;
}
void sleep(uSynergyCookie cookie, int timeMs)
{
printf("sleep, timeMs=%d\n", timeMs);
Sleep(timeMs);
}
uint32_t getTime()
{
printf("getTime\n");
return 0;
}
void trace(uSynergyCookie cookie, const char *text)
{
printf("%s\n", text);
}
void screenActive(uSynergyCookie cookie, uSynergyBool active)
{
printf("screenActive, active=%d\n", active);
}
void mouse(uSynergyCookie cookie, uint16_t x, uint16_t y, int16_t wheelX,
int16_t wheelY, uSynergyBool buttonLeft, uSynergyBool buttonRight,
uSynergyBool buttonMiddle)
{
printf("mouse, pos=%d,%d\n", x, y);
}
void keyboard(uSynergyCookie cookie, uint16_t key, uSynergyBool down,
uSynergyBool repeat)
{
printf("keyboard, key=%d down=%d repeat=%d\n", key, down, repeat);
}
void joystick(uSynergyCookie cookie, uint8_t joyNum, uint16_t buttons,
int8_t leftStickX, int8_t leftStickY, int8_t rightStickX,
int8_t rightStickY)
{
printf("joystick, left=%d,%d right=%d,%d\n", leftStickX, leftStickY,
rightStickX, rightStickY);
}
void clipboard(uSynergyCookie cookie, enum uSynergyClipboardFormat format,
const uint8_t *data, uint32_t size)
{
printf("clipboard, size=%d\n", size);
}

24
src/micro/CMakeLists.txt Normal file
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@ -0,0 +1,24 @@
# synergy -- mouse and keyboard sharing utility
# Copyright (C) 2012 Nick Bolton
#
# This package is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# found in the file COPYING that should have accompanied this file.
#
# This package is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
set(src
uSynergy.c
)
if (WIN32)
list(APPEND src uSynergy.h)
endif()
add_library(micro STATIC ${src})

633
src/micro/uSynergy.c Normal file
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@ -0,0 +1,633 @@
/*
uSynergy client -- Implementation for the embedded Synergy client library
version 1.0.0, July 7th, 2012
Copyright (c) 2012 Alex Evans
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.
*/
#include "uSynergy.h"
#include <stdio.h>
#include <string.h>
#include <varargs.h>
//---------------------------------------------------------------------------------------------------------------------
// Internal helpers
//---------------------------------------------------------------------------------------------------------------------
/**
@brief Read 16 bit integer in network byte order and convert to native byte order
**/
static int16_t sNetToNative16(const unsigned char *value)
{
#ifdef USYNERGY_LITTLE_ENDIAN
return value[0] | (value[1] << 8);
#else
return value[1] | (value[0] << 8);
#endif
}
/**
@brief Read 32 bit integer in network byte order and convert to native byte order
**/
static int32_t sNetToNative32(const unsigned char *value)
{
#ifdef USYNERGY_LITTLE_ENDIAN
return value[0] | (value[1] << 8) | (value[2] << 16) | (value[3] << 24);
#else
return value[3] | (value[2] << 8) | (value[1] << 16) | (value[0] << 24);
#endif
}
/**
@brief Trace text to client
**/
static void sTrace(uSynergyContext *context, const char* fmt, ...)
{
// Print to buffer, then call callback
char buffer[USYNERGY_TRACE_BUFFER_SIZE];
va_list va_alist;
// Expand arguments and format to string
va_start(va_alist);
vsprintf_s(buffer, USYNERGY_TRACE_BUFFER_SIZE, fmt, va_alist);
va_end(va_alist);
// Don't trace if we don't have a trace function
if (context->m_traceFunc != 0L)
context->m_traceFunc(context->m_cookie, buffer);
}
/**
@brief Add string to reply packet
**/
static void sAddString(uSynergyContext *context, const char *string)
{
size_t len = strlen(string);
memcpy(context->m_replyCur, string, len);
context->m_replyCur += len;
}
/**
@brief Add uint8 to reply packet
**/
static void sAddUInt8(uSynergyContext *context, uint8_t value)
{
*context->m_replyCur++ = value;
}
/**
@brief Add uint16 to reply packet
**/
static void sAddUInt16(uSynergyContext *context, uint16_t value)
{
uint8_t *reply = context->m_replyCur;
*reply++ = (uint8_t)(value >> 8);
*reply++ = (uint8_t)value;
context->m_replyCur = reply;
}
/**
@brief Add uint32 to reply packet
**/
static void sAddUInt32(uSynergyContext *context, uint32_t value)
{
uint8_t *reply = context->m_replyCur;
*reply++ = (uint8_t)(value >> 24);
*reply++ = (uint8_t)(value >> 16);
*reply++ = (uint8_t)(value >> 8);
*reply++ = (uint8_t)value;
context->m_replyCur = reply;
}
/**
@brief Send reply packet
**/
static uSynergyBool sSendReply(uSynergyContext *context)
{
// Set header size
uint8_t *reply_buf = context->m_replyBuffer;
uint32_t reply_len = (uint32_t)(context->m_replyCur - reply_buf); /* Total size of reply */
uint32_t body_len = reply_len - 4; /* Size of body */
uSynergyBool ret;
reply_buf[0] = (uint8_t)(body_len >> 24);
reply_buf[1] = (uint8_t)(body_len >> 16);
reply_buf[2] = (uint8_t)(body_len >> 8);
reply_buf[3] = (uint8_t)body_len;
// Send reply
ret = context->m_sendFunc(context->m_cookie, context->m_replyBuffer, reply_len);
// Reset reply buffer write pointer
context->m_replyCur = context->m_replyBuffer+4;
return ret;
}
/**
@brief Call mouse callback after a mouse event
**/
static void sSendMouseCallback(uSynergyContext *context)
{
// Skip if no callback is installed
if (context->m_mouseCallback == 0L)
return;
// Send callback
context->m_mouseCallback(context->m_cookie, context->m_mouseX, context->m_mouseY, context->m_mouseWheelX,
context->m_mouseWheelY, context->m_mouseButtonLeft, context->m_mouseButtonRight, context->m_mouseButtonMiddle);
}
/**
@brief Send keyboard callback when a key has been pressed or released
**/
static void sSendKeyboardCallback(uSynergyContext *context, uint16_t key, char down, char repeat, uint16_t modifiers)
{
// Skip if no callback is installed
if (context->m_keyboardCallback == 0L)
return;
// Send callback
modifiers;
context->m_keyboardCallback(context->m_cookie, key, down, repeat);
}
/**
@brief Send joystick callback
**/
static void sSendJoystickCallback(uSynergyContext *context, uint8_t joyNum)
{
int8_t *sticks;
// Skip if no callback is installed
if (context->m_joystickCallback == 0L)
return;
// Send callback
sticks = context->m_joystickSticks[joyNum];
context->m_joystickCallback(context->m_cookie, joyNum, context->m_joystickButtons[joyNum], sticks[0], sticks[1], sticks[2], sticks[3]);
}
/**
@brief Parse a single client message, update state, send callbacks and send replies
**/
#define USYNERGY_IS_PACKET(pkt_id) memcmp(message+4, pkt_id, 4)==0
static void sProcessMessage(uSynergyContext *context, const uint8_t *message)
{
// We have a packet!
if (memcmp(message+4, "Synergy", 7)==0)
{
// Welcome message
// kMsgHello = "Synergy%2i%2i"
// kMsgHelloBack = "Synergy%2i%2i%s"
sAddString(context, "Synergy");
sAddUInt16(context, USYNERGY_PROTOCOL_MAJOR);
sAddUInt16(context, USYNERGY_PROTOCOL_MINOR);
sAddUInt32(context, (uint32_t)strlen(context->m_clientName));
sAddString(context, context->m_clientName);
if (!sSendReply(context))
{
// Send reply failed, let's try to reconnect
sTrace(context, "SendReply failed, trying to reconnect in a second");
context->m_connected = USYNERGY_FALSE;
context->m_sleepFunc(context->m_cookie, 1000);
}
else
{
// Let's assume we're connected
sTrace(context, "Connected as client \"%s\"", context->m_clientName);
context->m_hasReceivedHello = USYNERGY_TRUE;
}
return;
}
else if (USYNERGY_IS_PACKET("QINF"))
{
// Screen info. Reply with DINF
// kMsgQInfo = "QINF"
// kMsgDInfo = "DINF%2i%2i%2i%2i%2i%2i%2i"
uint16_t x = 0, y = 0, warp = 0;
sAddString(context, "DINF");
sAddUInt16(context, x);
sAddUInt16(context, y);
sAddUInt16(context, context->m_clientWidth);
sAddUInt16(context, context->m_clientHeight);
sAddUInt16(context, warp);
sAddUInt16(context, 0); // mx?
sAddUInt16(context, 0); // my?
sSendReply(context);
return;
}
else if (USYNERGY_IS_PACKET("CIAK"))
{
// Do nothing?
// kMsgCInfoAck = "CIAK"
return;
}
else if (USYNERGY_IS_PACKET("CROP"))
{
// Do nothing?
// kMsgCResetOptions = "CROP"
return;
}
else if (USYNERGY_IS_PACKET("CINN"))
{
// Screen enter. Reply with CNOP
// kMsgCEnter = "CINN%2i%2i%4i%2i"
// Obtain the Synergy sequence number
context->m_sequenceNumber = sNetToNative32(message + 12);
context->m_isCaptured = USYNERGY_TRUE;
// Call callback
if (context->m_screenActiveCallback != 0L)
context->m_screenActiveCallback(context->m_cookie, USYNERGY_TRUE);
}
else if (USYNERGY_IS_PACKET("COUT"))
{
// Screen leave
// kMsgCLeave = "COUT"
context->m_isCaptured = USYNERGY_FALSE;
// Call callback
if (context->m_screenActiveCallback != 0L)
context->m_screenActiveCallback(context->m_cookie, USYNERGY_FALSE);
}
else if (USYNERGY_IS_PACKET("DMDN"))
{
// Mouse down
// kMsgDMouseDown = "DMDN%1i"
char btn = message[8]-1;
if (btn==2)
context->m_mouseButtonRight = USYNERGY_TRUE;
else if (btn==1)
context->m_mouseButtonMiddle = USYNERGY_TRUE;
else
context->m_mouseButtonLeft = USYNERGY_TRUE;
sSendMouseCallback(context);
}
else if (USYNERGY_IS_PACKET("DMUP"))
{
// Mouse up
// kMsgDMouseUp = "DMUP%1i"
char btn = message[8]-1;
if (btn==2)
context->m_mouseButtonRight = USYNERGY_FALSE;
else if (btn==1)
context->m_mouseButtonMiddle = USYNERGY_FALSE;
else
context->m_mouseButtonLeft = USYNERGY_FALSE;
sSendMouseCallback(context);
}
else if (USYNERGY_IS_PACKET("DMMV"))
{
// Mouse move. Reply with CNOP
// kMsgDMouseMove = "DMMV%2i%2i"
context->m_mouseX = sNetToNative16(message+8);
context->m_mouseY = sNetToNative16(message+10);
sSendMouseCallback(context);
}
else if (USYNERGY_IS_PACKET("DMWM"))
{
// Mouse wheel
// kMsgDMouseWheel = "DMWM%2i%2i"
// kMsgDMouseWheel1_0 = "DMWM%2i"
context->m_mouseWheelX += sNetToNative16(message+8);
context->m_mouseWheelY += sNetToNative16(message+10);
sSendMouseCallback(context);
}
else if (USYNERGY_IS_PACKET("DKDN"))
{
// Key down
// kMsgDKeyDown = "DKDN%2i%2i%2i"
// kMsgDKeyDown1_0 = "DKDN%2i%2i"
//uint16_t id = sNetToNative16(message+8);
uint16_t mod = sNetToNative16(message+10);
uint16_t key = sNetToNative16(message+12);
sSendKeyboardCallback(context, key, 1, 0, mod);
}
else if (USYNERGY_IS_PACKET("DKRP"))
{
// Key repeat
// kMsgDKeyRepeat = "DKRP%2i%2i%2i%2i"
// kMsgDKeyRepeat1_0 = "DKRP%2i%2i%2i"
}
else if (USYNERGY_IS_PACKET("DKUP"))
{
// Key up
// kMsgDKeyUp = "DKUP%2i%2i%2i"
// kMsgDKeyUp1_0 = "DKUP%2i%2i"
//uint16 id=Endian::sNetToNative(sbuf[4]);
uint16_t mod = sNetToNative16(message+10);
uint16_t key = sNetToNative16(message+12);
sSendKeyboardCallback(context, key, 0, 0, mod);
}
else if (USYNERGY_IS_PACKET("DGBT"))
{
// Joystick buttons
// kMsgDGameButtons = "DGBT%1i%2i";
uint8_t joy_num = message[8];
if (joy_num<USYNERGY_NUM_JOYSTICKS)
{
// Copy button state, then send callback
context->m_joystickButtons[joy_num] = (message[9] << 8) | message[10];
sSendJoystickCallback(context, joy_num);
}
}
else if (USYNERGY_IS_PACKET("DGST"))
{
// Joystick sticks
// kMsgDGameSticks = "DGST%1i%1i%1i%1i%1i";
uint8_t joy_num = message[8];
if (joy_num<USYNERGY_NUM_JOYSTICKS)
{
// Copy stick state, then send callback
memcpy(context->m_joystickSticks[joy_num], message+9, 4);
sSendJoystickCallback(context, joy_num);
}
}
else if (USYNERGY_IS_PACKET("DSOP"))
{
// Set options
// kMsgDSetOptions = "DSOP%4I"
}
else if (USYNERGY_IS_PACKET("CALV"))
{
// Keepalive, reply with CALV and then CNOP
// kMsgCKeepAlive = "CALV"
sAddString(context, "CALV");
sSendReply(context);
// now reply with CNOP
}
else if (USYNERGY_IS_PACKET("DCLP"))
{
// Clipboard message
// kMsgDClipboard = "DCLP%1i%4i%s"
//
// The clipboard message contains:
// 1 uint32: The size of the message
// 4 chars: The identifier ("DCLP")
// 1 uint8: The clipboard index
// 1 uint32: The sequence number. It's zero, because this message is always coming from the server?
// 1 uint32: The total size of the remaining 'string' (as per the Synergy %s string format (which is 1 uint32 for size followed by a char buffer (not necessarily null terminated)).
// 1 uint32: The number of formats present in the message
// And then 'number of formats' times the following:
// 1 uint32: The format of the clipboard data
// 1 uint32: The size n of the clipboard data
// n uint8: The clipboard data
const uint8_t * parse_msg = message+17;
uint32_t num_formats = sNetToNative32(parse_msg);
parse_msg += 4;
for (; num_formats; num_formats--)
{
// Parse clipboard format header
uint32_t format = sNetToNative32(parse_msg);
uint32_t size = sNetToNative32(parse_msg+4);
parse_msg += 8;
// Call callback
if (context->m_clipboardCallback)
context->m_clipboardCallback(context->m_cookie, format, parse_msg, size);
parse_msg += size;
}
}
else
{
// Unknown packet, could be any of these
// kMsgCNoop = "CNOP"
// kMsgCClose = "CBYE"
// kMsgCClipboard = "CCLP%1i%4i"
// kMsgCScreenSaver = "CSEC%1i"
// kMsgDKeyRepeat = "DKRP%2i%2i%2i%2i"
// kMsgDKeyRepeat1_0 = "DKRP%2i%2i%2i"
// kMsgDMouseRelMove = "DMRM%2i%2i"
// kMsgEIncompatible = "EICV%2i%2i"
// kMsgEBusy = "EBSY"
// kMsgEUnknown = "EUNK"
// kMsgEBad = "EBAD"
sTrace(context, "Unknown packet '%c%c%c%c'", message[4], message[5], message[6], message[7]);
return;
}
// Reply with CNOP maybe?
sAddString(context, "CNOP");
sSendReply(context);
}
#undef USYNERGY_IS_PACKET
/**
@brief Mark context as being disconnected
**/
static void sSetDisconnected(uSynergyContext *context)
{
context->m_connected = USYNERGY_FALSE;
context->m_hasReceivedHello = USYNERGY_FALSE;
context->m_isCaptured = USYNERGY_FALSE;
context->m_replyCur = context->m_replyBuffer + 4;
context->m_sequenceNumber = 0;
}
/**
@brief Update a connected context
**/
static void sUpdateContext(uSynergyContext *context)
{
/* Receive data (blocking) */
int receive_size = USYNERGY_RECEIVE_BUFFER_SIZE - context->m_receiveOfs;
int num_received = 0;
int packlen = 0;
if (context->m_receiveFunc(context->m_cookie, context->m_receiveBuffer, receive_size, &num_received) == USYNERGY_FALSE)
{
/* Receive failed, let's try to reconnect */
sTrace(context, "Receive failed (%d bytes asked, %d bytes received), trying to reconnect in a second", receive_size, num_received);
sSetDisconnected(context);
context->m_sleepFunc(context->m_cookie, 1000);
return;
}
context->m_receiveOfs += num_received;
/* If we didn't receive any data then we're probably still polling to get connected and
therefore not getting any data back. To avoid overloading the system with a Synergy
thread that would hammer on polling, we let it rest for a bit if there's no data. */
if (num_received == 0)
context->m_sleepFunc(context->m_cookie, 500);
/* Check for timeouts */
if (context->m_hasReceivedHello)
{
uint32_t cur_time = context->m_getTimeFunc();
if (num_received == 0)
{
/* Timeout after 2 secs of inactivity (we received no CALV) */
if ((cur_time - context->m_lastMessageTime) > USYNERGY_IDLE_TIMEOUT)
sSetDisconnected(context);
}
else
context->m_lastMessageTime = cur_time;
}
/* Eat packets */
for (;;)
{
/* Grab packet length and bail out if the packet goes beyond the end of the buffer */
packlen = sNetToNative32(context->m_receiveBuffer);
if (packlen+4 > context->m_receiveOfs)
break;
/* Process message */
sProcessMessage(context, context->m_receiveBuffer);
/* Move packet to front of buffer */
memmove(context->m_receiveBuffer, context->m_receiveBuffer+packlen+4, context->m_receiveOfs-packlen-4);
context->m_receiveOfs -= packlen+4;
}
/* Throw away over-sized packets */
if (packlen > USYNERGY_RECEIVE_BUFFER_SIZE)
{
/* Oversized packet, ditch tail end */
sTrace(context, "Oversized packet: '%c%c%c%c' (length %d)", context->m_receiveBuffer[4], context->m_receiveBuffer[5], context->m_receiveBuffer[6], context->m_receiveBuffer[7], packlen);
num_received = context->m_receiveOfs-4; // 4 bytes for the size field
while (num_received != packlen)
{
int buffer_left = packlen - num_received;
int to_receive = buffer_left < USYNERGY_RECEIVE_BUFFER_SIZE ? buffer_left : USYNERGY_RECEIVE_BUFFER_SIZE;
int ditch_received = 0;
if (context->m_receiveFunc(context->m_cookie, context->m_receiveBuffer, to_receive, &ditch_received) == USYNERGY_FALSE)
{
/* Receive failed, let's try to reconnect */
sTrace(context, "Synergy: Receive failed, trying to reconnect in a second");
sSetDisconnected(context);
context->m_sleepFunc(context->m_cookie, 1000);
break;
}
else
{
num_received += ditch_received;
}
}
context->m_receiveOfs = 0;
}
}
//---------------------------------------------------------------------------------------------------------------------
// Public interface
//---------------------------------------------------------------------------------------------------------------------
/**
@brief Initialize uSynergy context
**/
void uSynergyInit(uSynergyContext *context)
{
/* Zero memory */
memset(context, 0, sizeof(uSynergyContext));
/* Initialize to default state */
sSetDisconnected(context);
}
/**
@brief Update uSynergy
**/
void uSynergyUpdate(uSynergyContext *context)
{
if (context->m_connected)
{
/* Update context, receive data, call callbacks */
sUpdateContext(context);
}
else
{
/* Try to connect */
if (context->m_connectFunc(context->m_cookie))
context->m_connected = USYNERGY_TRUE;
}
}
/**
@brief Send clipboard data
**/
void uSynergySendClipboard(uSynergyContext *context, const char *text)
{
// Calculate maximum size that will fit in a reply packet
uint32_t overhead_size = 4 + /* Message size */
4 + /* Message ID */
1 + /* Clipboard index */
4 + /* Sequence number */
4 + /* Rest of message size (because it's a Synergy string from here on) */
4 + /* Number of clipboard formats */
4 + /* Clipboard format */
4; /* Clipboard data length */
uint32_t max_length = USYNERGY_REPLY_BUFFER_SIZE - overhead_size;
// Clip text to max length
uint32_t text_length = (uint32_t)strlen(text);
if (text_length > max_length)
{
sTrace(context, "Clipboard buffer too small, clipboard truncated at %d characters", max_length);
text_length = max_length;
}
// Assemble packet
sAddString(context, "DCLP");
sAddUInt8(context, 0); /* Clipboard index */
sAddUInt32(context, context->m_sequenceNumber);
sAddUInt32(context, 4+4+4+text_length); /* Rest of message size: numFormats, format, length, data */
sAddUInt32(context, 1); /* Number of formats (only text for now) */
sAddUInt32(context, USYNERGY_CLIPBOARD_FORMAT_TEXT);
sAddUInt32(context, text_length);
sAddString(context, text);
sSendReply(context);
}

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/*
uSynergy client -- Interface for the embedded Synergy client library
version 1.0.0, July 7th, 2012
Copyright (c) 2012 Alex Evans
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.
*/
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
//---------------------------------------------------------------------------------------------------------------------
// Configuration
//---------------------------------------------------------------------------------------------------------------------
/**
@brief Determine endianness
**/
#if defined(USYNERGY_LITTLE_ENDIAN) && defined(USYNERGY_BIG_ENDIAN)
/* Ambiguous: both endians specified */
#error "Can't define both USYNERGY_LITTLE_ENDIAN and USYNERGY_BIG_ENDIAN"
#elif !defined(USYNERGY_LITTLE_ENDIAN) && !defined(USYNERGY_BIG_ENDIAN)
/* Attempt to auto detect */
#if defined(__LITTLE_ENDIAN__) || defined(LITTLE_ENDIAN) || (_BYTE_ORDER == _LITTLE_ENDIAN)
#define USYNERGY_LITTLE_ENDIAN
#elif defined(__BIG_ENDIAN__) || defined(BIG_ENDIAN) || (_BYTE_ORDER == _BIG_ENDIAN)
#define USYNERGY_BIG_ENDIAN
#else
#error "Can't detect endian-nes, please defined either USYNERGY_LITTLE_ENDIAN or USYNERGY_BIG_ENDIAN";
#endif
#else
/* User-specified endian-nes, nothing to do for us */
#endif
//---------------------------------------------------------------------------------------------------------------------
// Types and Constants
//---------------------------------------------------------------------------------------------------------------------
/**
@brief Boolean type
**/
typedef int uSynergyBool;
#define USYNERGY_FALSE 0 /* False value */
#define USYNERGY_TRUE 1 /* True value */
/**
@brief User context type
The uSynergyCookie type is an opaque type that is used by uSynergy to communicate to the client. It is passed along to
callback functions as context.
**/
typedef struct { int ignored; } * uSynergyCookie;
/**
@brief Clipboard types
**/
enum uSynergyClipboardFormat
{
USYNERGY_CLIPBOARD_FORMAT_TEXT = 0, /* Text format, UTF-8, newline is LF */
USYNERGY_CLIPBOARD_FORMAT_BITMAP = 1, /* Bitmap format, BMP 24/32bpp, BI_RGB */
USYNERGY_CLIPBOARD_FORMAT_HTML = 2, /* HTML format, HTML fragment, UTF-8, newline is LF */
};
/**
@brief Constants and limits
**/
#define USYNERGY_NUM_JOYSTICKS 4 /* Maximum number of supported joysticks */
#define USYNERGY_PROTOCOL_MAJOR 1 /* Major protocol version */
#define USYNERGY_PROTOCOL_MINOR 4 /* Minor protocol version */
#define USYNERGY_IDLE_TIMEOUT 2000 /* Timeout in milliseconds before reconnecting */
#define USYNERGY_TRACE_BUFFER_SIZE 1024 /* Maximum length of traced message */
#define USYNERGY_REPLY_BUFFER_SIZE 1024 /* Maximum size of a reply packet */
#define USYNERGY_RECEIVE_BUFFER_SIZE 4096 /* Maximum size of an incoming packet */
//---------------------------------------------------------------------------------------------------------------------
// Functions and Callbacks
//---------------------------------------------------------------------------------------------------------------------
/**
@brief Connect function
This function is called when uSynergy needs to connect to the host. It doesn't imply a network implementation or
destination address, that must all be handled on the user side. The function should return USYNERGY_TRUE if a
connection was established or USYNERGY_FALSE if it could not connect.
When network errors occur (e.g. uSynergySend or uSynergyReceive fail) then the connect call will be called again
so the implementation of the function must close any old connections and clean up resources before retrying.
@param cookie Cookie supplied in the Synergy context
**/
typedef uSynergyBool (*uSynergyConnectFunc)(uSynergyCookie cookie);
/**
@brief Send function
This function is called when uSynergy needs to send something over the default connection. It should return
USYNERGY_TRUE if sending succeeded and USYNERGY_FALSE otherwise. This function should block until the send
operation is completed.
@param cookie Cookie supplied in the Synergy context
@param buffer Address of buffer to send
@param length Length of buffer to send
**/
typedef uSynergyBool (*uSynergySendFunc)(uSynergyCookie cookie, const uint8_t *buffer, int length);
/**
@brief Receive function
This function is called when uSynergy needs to receive data from the default connection. It should return
USYNERGY_TRUE if receiving data succeeded and USYNERGY_FALSE otherwise. This function should block until data
has been received and wait for data to become available. If @a outLength is set to 0 upon completion it is
assumed that the connection is alive, but still in a connecting state and needs time to settle.
@param cookie Cookie supplied in the Synergy context
@param buffer Address of buffer to receive data into
@param maxLength Maximum amount of bytes to write into the receive buffer
@param outLength Address of integer that receives the actual amount of bytes written into @a buffer
**/
typedef uSynergyBool (*uSynergyReceiveFunc)(uSynergyCookie cookie, uint8_t *buffer, int maxLength, int* outLength);
/**
@brief Thread sleep function
This function is called when uSynergy wants to suspend operation for a while before retrying an operation. It
is mostly used when a socket times out or disconnect occurs to prevent uSynergy from continuously hammering a
network connection in case the network is down.
@param cookie Cookie supplied in the Synergy context
@param timeMs Time to sleep the current thread (in milliseconds)
**/
typedef void (*uSynergySleepFunc)(uSynergyCookie cookie, int timeMs);
/**
@brief Get time function
This function is called when uSynergy needs to know the current time. This is used to determine when timeouts
have occured. The time base should be a cyclic millisecond time value.
@returns Time value in milliseconds
**/
typedef uint32_t (*uSynergyGetTimeFunc)();
/**
@brief Trace function
This function is called when uSynergy wants to trace something. It is optional to show these messages, but they
are often useful when debugging. uSynergy only traces major events like connecting and disconnecting. Usually
only a single trace is shown when the connection is established and no more trace are called.
@param cookie Cookie supplied in the Synergy context
@param text Text to be traced
**/
typedef void (*uSynergyTraceFunc)(uSynergyCookie cookie, const char *text);
/**
@brief Screen active callback
This callback is called when Synergy makes the screen active or inactive. This
callback is usually sent when the mouse enters or leaves the screen.
@param cookie Cookie supplied in the Synergy context
@param active Activation flag, 1 if the screen has become active, 0 if the screen has become inactive
**/
typedef void (*uSynergyScreenActiveCallback)(uSynergyCookie cookie, uSynergyBool active);
/**
@brief Mouse callback
This callback is called when a mouse events happens. The mouse X and Y position,
wheel and button state is communicated in the message. It's up to the user to
interpret if this is a mouse up, down, double-click or other message.
@param cookie Cookie supplied in the Synergy context
@param x Mouse X position
@param y Mouse Y position
@param wheelX Mouse wheel X position
@param wheelY Mouse wheel Y position
@param buttonLeft Left button pressed status, 0 for released, 1 for pressed
@param buttonMiddle Middle button pressed status, 0 for released, 1 for pressed
@param buttonRight Right button pressed status, 0 for released, 1 for pressed
**/
typedef void (*uSynergyMouseCallback)(uSynergyCookie cookie, uint16_t x, uint16_t y, int16_t wheelX, int16_t wheelY, uSynergyBool buttonLeft, uSynergyBool buttonRight, uSynergyBool buttonMiddle);
/**
@brief Key event callback
This callback is called when a key is pressed or released.
@param cookie Cookie supplied in the Synergy context
@param key Key code of key that was pressed or released
@param down Down or up status, 1 is key is pressed down, 0 if key is released (up)
@param repeat Repeat flag, 1 if the key is down because the key is repeating, 0 if the key is initially pressed by the user
**/
typedef void (*uSynergyKeyboardCallback)(uSynergyCookie cookie, uint16_t key, uSynergyBool down, uSynergyBool repeat);
/**
@brief Joystick event callback
This callback is called when a joystick stick or button changes. It is possible that multiple callbacks are
fired when different sticks or buttons change as these are individual messages in the packet stream. Each
callback will contain all the valid state for the different axes and buttons. The last callback received will
represent the most current joystick state.
@param cookie Cookie supplied in the Synergy context
@param joyNum Joystick number, always in the range [0 ... USYNERGY_NUM_JOYSTICKS>
@param buttons Button pressed mask
@param leftStickX Left stick X position, in range [-127 ... 127]
@param leftStickY Left stick Y position, in range [-127 ... 127]
@param rightStickX Right stick X position, in range [-127 ... 127]
@param rightStickY Right stick Y position, in range [-127 ... 127]
**/
typedef void (*uSynergyJoystickCallback)(uSynergyCookie cookie, uint8_t joyNum, uint16_t buttons, int8_t leftStickX, int8_t leftStickY, int8_t rightStickX, int8_t rightStickY);
/**
@brief Clipboard event callback
This callback is called when something is placed on the clipboard. Multiple callbacks may be fired for
multiple clipboard formats if they are supported. The data provided is read-only and may not be modified
by the application.
@param cookie Cookie supplied in the Synergy context
@param format Clipboard format
@param data Memory area containing the clipboard raw data
@param size Size of clipboard data
**/
typedef void (*uSynergyClipboardCallback)(uSynergyCookie cookie, enum uSynergyClipboardFormat format, const uint8_t *data, uint32_t size);
//---------------------------------------------------------------------------------------------------------------------
// Context
//---------------------------------------------------------------------------------------------------------------------
/**
@brief uSynergy context
**/
typedef struct
{
/* Mandatory configuration data, filled in by client */
uSynergyConnectFunc m_connectFunc; /* Connect function */
uSynergySendFunc m_sendFunc; /* Send data function */
uSynergyReceiveFunc m_receiveFunc; /* Receive data function */
uSynergySleepFunc m_sleepFunc; /* Thread sleep function */
uSynergyGetTimeFunc m_getTimeFunc; /* Get current time function */
const char* m_clientName; /* Name of Synergy Screen / Client */
uint16_t m_clientWidth; /* Width of screen */
uint16_t m_clientHeight; /* Height of screen */
/* Optional configuration data, filled in by client */
uSynergyCookie m_cookie; /* Cookie pointer passed to callback functions (can be NULL) */
uSynergyTraceFunc m_traceFunc; /* Function for tracing status (can be NULL) */
uSynergyScreenActiveCallback m_screenActiveCallback; /* Callback for entering and leaving screen */
uSynergyMouseCallback m_mouseCallback; /* Callback for mouse events */
uSynergyKeyboardCallback m_keyboardCallback; /* Callback for keyboard events */
uSynergyJoystickCallback m_joystickCallback; /* Callback for joystick events */
uSynergyClipboardCallback m_clipboardCallback; /* Callback for clipboard events */
/* State data, used internall by client, initialized by uSynergyInit() */
uSynergyBool m_connected; /* Is our socket connected? */
uSynergyBool m_hasReceivedHello; /* Have we received a 'Hello' from the server? */
uSynergyBool m_isCaptured; /* Is Synergy active (i.e. this client is receiving input messages?) */
uint32_t m_lastMessageTime; /* Time at which last message was received */
uint32_t m_sequenceNumber; /* Packet sequence number */
uint8_t m_receiveBuffer[USYNERGY_RECEIVE_BUFFER_SIZE]; /* Receive buffer */
int m_receiveOfs; /* Receive buffer offset */
uint8_t m_replyBuffer[USYNERGY_REPLY_BUFFER_SIZE]; /* Reply buffer */
uint8_t* m_replyCur; /* Write offset into reply buffer */
uint16_t m_mouseX; /* Mouse X position */
uint16_t m_mouseY; /* Mouse Y position */
int16_t m_mouseWheelX; /* Mouse wheel X position */
int16_t m_mouseWheelY; /* Mouse wheel Y position */
uSynergyBool m_mouseButtonLeft; /* Mouse left button */
uSynergyBool m_mouseButtonRight; /* Mouse right button */
uSynergyBool m_mouseButtonMiddle; /* Mouse middle button */
int8_t m_joystickSticks[USYNERGY_NUM_JOYSTICKS][4]; /* Joystick stick position in 2 axes for 2 sticks */
uint16_t m_joystickButtons[USYNERGY_NUM_JOYSTICKS]; /* Joystick button state */
} uSynergyContext;
//---------------------------------------------------------------------------------------------------------------------
// Interface
//---------------------------------------------------------------------------------------------------------------------
/**
@brief Initialize uSynergy context
This function initializes @a context for use. Call this function directly after
creating the context, before filling in any configuration data in it. Not calling
this function will cause undefined behavior.
@param context Context to be initialized
**/
extern void uSynergyInit(uSynergyContext *context);
/**
@brief Update uSynergy
This function updates uSynergy and does the bulk of the work. It does connection management,
receiving data, reconnecting after errors or timeouts and so on. It assumes that networking
operations are blocking and it can suspend the current thread if it needs to wait. It is
best practice to call uSynergyUpdate from a background thread so it is responsive.
Because uSynergy relies mostly on blocking calls it will mostly stay in thread sleep state
waiting for system mutexes and won't eat much memory.
uSynergyUpdate doesn't do any memory allocations or have any side effects beyond those of
the callbacks it calls.
@param context Context to be updated
**/
extern void uSynergyUpdate(uSynergyContext *context);
/**
@brief Send clipboard data
This function sets new clipboard data and sends it to the server. Use this function if
your client cuts or copies data onto the clipboard that it needs to share with the
server.
Currently there is only support for plaintext, but HTML and image data could be
supported with some effort.
@param context Context to send clipboard data to
@param text Text to set to the clipboard
**/
extern void uSynergySendClipboard(uSynergyContext *context, const char *text);
#ifdef __cplusplus
};
#endif