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@@ -1,636 +1,636 @@
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-/*
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-uSynergy client -- Implementation for the embedded Synergy client library
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- version 1.0.0, July 7th, 2012
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-
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-Copyright (c) 2012 Alex Evans
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-
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-This software is provided 'as-is', without any express or implied
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-warranty. In no event will the authors be held liable for any damages
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-arising from the use of this software.
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-
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-Permission is granted to anyone to use this software for any purpose,
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-including commercial applications, and to alter it and redistribute it
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-freely, subject to the following restrictions:
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-
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- 1. The origin of this software must not be misrepresented; you must not
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- claim that you wrote the original software. If you use this software
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- in a product, an acknowledgment in the product documentation would be
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- appreciated but is not required.
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-
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- 2. Altered source versions must be plainly marked as such, and must not be
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- misrepresented as being the original software.
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-
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- 3. This notice may not be removed or altered from any source
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- distribution.
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-*/
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-#include "uSynergy.h"
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-#include <stdio.h>
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-#include <string.h>
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-
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-
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-
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-//---------------------------------------------------------------------------------------------------------------------
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-// Internal helpers
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-//---------------------------------------------------------------------------------------------------------------------
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-
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-
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-
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-/**
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-@brief Read 16 bit integer in network byte order and convert to native byte order
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-**/
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-static int16_t sNetToNative16(const unsigned char *value)
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-{
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-#ifdef USYNERGY_LITTLE_ENDIAN
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- return value[1] | (value[0] << 8);
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-#else
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- return value[0] | (value[1] << 8);
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-#endif
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-}
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-
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-
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-
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-/**
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-@brief Read 32 bit integer in network byte order and convert to native byte order
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-**/
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-static int32_t sNetToNative32(const unsigned char *value)
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-{
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-#ifdef USYNERGY_LITTLE_ENDIAN
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- return value[3] | (value[2] << 8) | (value[1] << 16) | (value[0] << 24);
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-#else
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- return value[0] | (value[1] << 8) | (value[2] << 16) | (value[3] << 24);
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-#endif
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-}
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-
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-
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-
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-/**
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-@brief Trace text to client
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-**/
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-static void sTrace(uSynergyContext *context, const char* text)
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-{
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- // Don't trace if we don't have a trace function
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- if (context->m_traceFunc != 0L)
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- context->m_traceFunc(context->m_cookie, text);
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-}
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-
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-
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-
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-/**
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-@brief Add string to reply packet
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-**/
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-static void sAddString(uSynergyContext *context, const char *string)
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-{
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- size_t len = strlen(string);
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- memcpy(context->m_replyCur, string, len);
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- context->m_replyCur += len;
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-}
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-
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-
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-
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-/**
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-@brief Add uint8 to reply packet
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-**/
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-static void sAddUInt8(uSynergyContext *context, uint8_t value)
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-{
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- *context->m_replyCur++ = value;
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-}
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-
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-
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-
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-/**
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-@brief Add uint16 to reply packet
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-**/
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-static void sAddUInt16(uSynergyContext *context, uint16_t value)
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-{
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- uint8_t *reply = context->m_replyCur;
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- *reply++ = (uint8_t)(value >> 8);
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- *reply++ = (uint8_t)value;
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- context->m_replyCur = reply;
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-}
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-
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-
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-
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-/**
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-@brief Add uint32 to reply packet
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-**/
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-static void sAddUInt32(uSynergyContext *context, uint32_t value)
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-{
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- uint8_t *reply = context->m_replyCur;
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- *reply++ = (uint8_t)(value >> 24);
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- *reply++ = (uint8_t)(value >> 16);
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- *reply++ = (uint8_t)(value >> 8);
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- *reply++ = (uint8_t)value;
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- context->m_replyCur = reply;
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-}
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-
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-
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-
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-/**
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-@brief Send reply packet
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-**/
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-static uSynergyBool sSendReply(uSynergyContext *context)
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-{
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- // Set header size
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- uint8_t *reply_buf = context->m_replyBuffer;
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- uint32_t reply_len = (uint32_t)(context->m_replyCur - reply_buf); /* Total size of reply */
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- uint32_t body_len = reply_len - 4; /* Size of body */
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- uSynergyBool ret;
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- reply_buf[0] = (uint8_t)(body_len >> 24);
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- reply_buf[1] = (uint8_t)(body_len >> 16);
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- reply_buf[2] = (uint8_t)(body_len >> 8);
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- reply_buf[3] = (uint8_t)body_len;
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-
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- // Send reply
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- ret = context->m_sendFunc(context->m_cookie, context->m_replyBuffer, reply_len);
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-
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- // Reset reply buffer write pointer
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- context->m_replyCur = context->m_replyBuffer+4;
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- return ret;
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-}
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-
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-
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-
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-/**
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-@brief Call mouse callback after a mouse event
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-**/
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-static void sSendMouseCallback(uSynergyContext *context)
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-{
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- // Skip if no callback is installed
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- if (context->m_mouseCallback == 0L)
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- return;
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-
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- // Send callback
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- context->m_mouseCallback(context->m_cookie, context->m_mouseX, context->m_mouseY, context->m_mouseWheelX,
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- context->m_mouseWheelY, context->m_mouseButtonLeft, context->m_mouseButtonRight, context->m_mouseButtonMiddle);
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-}
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-
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-
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-
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-/**
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-@brief Send keyboard callback when a key has been pressed or released
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-**/
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-static void sSendKeyboardCallback(uSynergyContext *context, uint16_t key, uint16_t modifiers, uSynergyBool down, uSynergyBool repeat)
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-{
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- // Skip if no callback is installed
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- if (context->m_keyboardCallback == 0L)
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- return;
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-
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- // Send callback
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- context->m_keyboardCallback(context->m_cookie, key, modifiers, down, repeat);
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-}
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-
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-
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-
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-/**
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-@brief Send joystick callback
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-**/
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-static void sSendJoystickCallback(uSynergyContext *context, uint8_t joyNum)
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-{
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- int8_t *sticks;
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-
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- // Skip if no callback is installed
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- if (context->m_joystickCallback == 0L)
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- return;
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-
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- // Send callback
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- sticks = context->m_joystickSticks[joyNum];
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- context->m_joystickCallback(context->m_cookie, joyNum, context->m_joystickButtons[joyNum], sticks[0], sticks[1], sticks[2], sticks[3]);
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-}
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-
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-
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-
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-/**
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-@brief Parse a single client message, update state, send callbacks and send replies
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-**/
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-#define USYNERGY_IS_PACKET(pkt_id) memcmp(message+4, pkt_id, 4)==0
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-static void sProcessMessage(uSynergyContext *context, const uint8_t *message)
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-{
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- // We have a packet!
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- if (memcmp(message+4, "Synergy", 7)==0)
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- {
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- // Welcome message
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- // kMsgHello = "Synergy%2i%2i"
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- // kMsgHelloBack = "Synergy%2i%2i%s"
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- sAddString(context, "Synergy");
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- sAddUInt16(context, USYNERGY_PROTOCOL_MAJOR);
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- sAddUInt16(context, USYNERGY_PROTOCOL_MINOR);
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- sAddUInt32(context, (uint32_t)strlen(context->m_clientName));
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- sAddString(context, context->m_clientName);
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- if (!sSendReply(context))
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- {
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- // Send reply failed, let's try to reconnect
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- sTrace(context, "SendReply failed, trying to reconnect in a second");
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- context->m_connected = USYNERGY_FALSE;
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- context->m_sleepFunc(context->m_cookie, 1000);
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- }
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- else
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- {
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- // Let's assume we're connected
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- char buffer[256+1];
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- sprintf(buffer, "Connected as client \"%s\"", context->m_clientName);
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- sTrace(context, buffer);
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- context->m_hasReceivedHello = USYNERGY_TRUE;
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- }
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- return;
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- }
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- else if (USYNERGY_IS_PACKET("QINF"))
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- {
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- // Screen info. Reply with DINF
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- // kMsgQInfo = "QINF"
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- // kMsgDInfo = "DINF%2i%2i%2i%2i%2i%2i%2i"
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- uint16_t x = 0, y = 0, warp = 0;
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- sAddString(context, "DINF");
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- sAddUInt16(context, x);
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- sAddUInt16(context, y);
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- sAddUInt16(context, context->m_clientWidth);
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- sAddUInt16(context, context->m_clientHeight);
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- sAddUInt16(context, warp);
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- sAddUInt16(context, 0); // mx?
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- sAddUInt16(context, 0); // my?
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- sSendReply(context);
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- return;
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- }
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- else if (USYNERGY_IS_PACKET("CIAK"))
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- {
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- // Do nothing?
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- // kMsgCInfoAck = "CIAK"
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- return;
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- }
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- else if (USYNERGY_IS_PACKET("CROP"))
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- {
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- // Do nothing?
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- // kMsgCResetOptions = "CROP"
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- return;
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- }
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- else if (USYNERGY_IS_PACKET("CINN"))
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- {
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- // Screen enter. Reply with CNOP
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- // kMsgCEnter = "CINN%2i%2i%4i%2i"
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-
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- // Obtain the Synergy sequence number
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- context->m_sequenceNumber = sNetToNative32(message + 12);
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- context->m_isCaptured = USYNERGY_TRUE;
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-
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- // Call callback
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- if (context->m_screenActiveCallback != 0L)
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- context->m_screenActiveCallback(context->m_cookie, USYNERGY_TRUE);
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- }
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- else if (USYNERGY_IS_PACKET("COUT"))
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- {
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- // Screen leave
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- // kMsgCLeave = "COUT"
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- context->m_isCaptured = USYNERGY_FALSE;
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-
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- // Call callback
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- if (context->m_screenActiveCallback != 0L)
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- context->m_screenActiveCallback(context->m_cookie, USYNERGY_FALSE);
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- }
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- else if (USYNERGY_IS_PACKET("DMDN"))
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- {
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- // Mouse down
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- // kMsgDMouseDown = "DMDN%1i"
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- char btn = message[8]-1;
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- if (btn==2)
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- context->m_mouseButtonRight = USYNERGY_TRUE;
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- else if (btn==1)
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- context->m_mouseButtonMiddle = USYNERGY_TRUE;
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- else
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- context->m_mouseButtonLeft = USYNERGY_TRUE;
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- sSendMouseCallback(context);
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- }
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- else if (USYNERGY_IS_PACKET("DMUP"))
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- {
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- // Mouse up
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- // kMsgDMouseUp = "DMUP%1i"
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- char btn = message[8]-1;
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- if (btn==2)
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- context->m_mouseButtonRight = USYNERGY_FALSE;
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- else if (btn==1)
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- context->m_mouseButtonMiddle = USYNERGY_FALSE;
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- else
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- context->m_mouseButtonLeft = USYNERGY_FALSE;
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- sSendMouseCallback(context);
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- }
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- else if (USYNERGY_IS_PACKET("DMMV"))
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- {
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- // Mouse move. Reply with CNOP
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- // kMsgDMouseMove = "DMMV%2i%2i"
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- context->m_mouseX = sNetToNative16(message+8);
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- context->m_mouseY = sNetToNative16(message+10);
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- sSendMouseCallback(context);
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- }
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- else if (USYNERGY_IS_PACKET("DMWM"))
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- {
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- // Mouse wheel
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- // kMsgDMouseWheel = "DMWM%2i%2i"
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- // kMsgDMouseWheel1_0 = "DMWM%2i"
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- context->m_mouseWheelX += sNetToNative16(message+8);
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- context->m_mouseWheelY += sNetToNative16(message+10);
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- sSendMouseCallback(context);
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- }
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- else if (USYNERGY_IS_PACKET("DKDN"))
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- {
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- // Key down
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- // kMsgDKeyDown = "DKDN%2i%2i%2i"
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- // kMsgDKeyDown1_0 = "DKDN%2i%2i"
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- //uint16_t id = sNetToNative16(message+8);
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- uint16_t mod = sNetToNative16(message+10);
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- uint16_t key = sNetToNative16(message+12);
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- sSendKeyboardCallback(context, key, mod, USYNERGY_TRUE, USYNERGY_FALSE);
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- }
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- else if (USYNERGY_IS_PACKET("DKRP"))
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- {
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- // Key repeat
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- // kMsgDKeyRepeat = "DKRP%2i%2i%2i%2i"
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- // kMsgDKeyRepeat1_0 = "DKRP%2i%2i%2i"
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- uint16_t mod = sNetToNative16(message+10);
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-// uint16_t count = sNetToNative16(message+12);
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- uint16_t key = sNetToNative16(message+14);
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- sSendKeyboardCallback(context, key, mod, USYNERGY_TRUE, USYNERGY_TRUE);
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- }
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- else if (USYNERGY_IS_PACKET("DKUP"))
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- {
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- // Key up
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- // kMsgDKeyUp = "DKUP%2i%2i%2i"
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- // kMsgDKeyUp1_0 = "DKUP%2i%2i"
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- //uint16 id=Endian::sNetToNative(sbuf[4]);
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- uint16_t mod = sNetToNative16(message+10);
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- uint16_t key = sNetToNative16(message+12);
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- sSendKeyboardCallback(context, key, mod, USYNERGY_FALSE, USYNERGY_FALSE);
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- }
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- else if (USYNERGY_IS_PACKET("DGBT"))
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- {
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- // Joystick buttons
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- // kMsgDGameButtons = "DGBT%1i%2i";
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- uint8_t joy_num = message[8];
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- if (joy_num<USYNERGY_NUM_JOYSTICKS)
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- {
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- // Copy button state, then send callback
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- context->m_joystickButtons[joy_num] = (message[9] << 8) | message[10];
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- sSendJoystickCallback(context, joy_num);
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- }
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- }
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- else if (USYNERGY_IS_PACKET("DGST"))
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- {
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- // Joystick sticks
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- // kMsgDGameSticks = "DGST%1i%1i%1i%1i%1i";
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- uint8_t joy_num = message[8];
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- if (joy_num<USYNERGY_NUM_JOYSTICKS)
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- {
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- // Copy stick state, then send callback
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- memcpy(context->m_joystickSticks[joy_num], message+9, 4);
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- sSendJoystickCallback(context, joy_num);
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- }
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- }
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- else if (USYNERGY_IS_PACKET("DSOP"))
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- {
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- // Set options
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- // kMsgDSetOptions = "DSOP%4I"
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- }
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- else if (USYNERGY_IS_PACKET("CALV"))
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- {
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- // Keepalive, reply with CALV and then CNOP
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- // kMsgCKeepAlive = "CALV"
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- sAddString(context, "CALV");
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- sSendReply(context);
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- // now reply with CNOP
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- }
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- else if (USYNERGY_IS_PACKET("DCLP"))
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- {
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- // Clipboard message
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|
|
- // 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"
|
|
|
- char buffer[64];
|
|
|
- sprintf(buffer, "Unknown packet '%c%c%c%c'", message[4], message[5], message[6], message[7]);
|
|
|
- sTrace(context, buffer);
|
|
|
- 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 + context->m_receiveOfs, receive_size, &num_received) == USYNERGY_FALSE)
|
|
|
- {
|
|
|
- /* Receive failed, let's try to reconnect */
|
|
|
- char buffer[128];
|
|
|
- sprintf(buffer, "Receive failed (%d bytes asked, %d bytes received), trying to reconnect in a second", receive_size, num_received);
|
|
|
- sTrace(context, buffer);
|
|
|
- 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 */
|
|
|
- char buffer[128];
|
|
|
- sprintf(buffer, "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);
|
|
|
- sTrace(context, buffer);
|
|
|
- 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, "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)
|
|
|
- {
|
|
|
- char buffer[128];
|
|
|
- sprintf(buffer, "Clipboard buffer too small, clipboard truncated at %d characters", max_length);
|
|
|
- sTrace(context, buffer);
|
|
|
- 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);
|
|
|
-}
|
|
|
+/*
|
|
|
+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>
|
|
|
+
|
|
|
+
|
|
|
+
|
|
|
+//---------------------------------------------------------------------------------------------------------------------
|
|
|
+// 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[1] | (value[0] << 8);
|
|
|
+#else
|
|
|
+ return value[0] | (value[1] << 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[3] | (value[2] << 8) | (value[1] << 16) | (value[0] << 24);
|
|
|
+#else
|
|
|
+ return value[0] | (value[1] << 8) | (value[2] << 16) | (value[3] << 24);
|
|
|
+#endif
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+
|
|
|
+/**
|
|
|
+@brief Trace text to client
|
|
|
+**/
|
|
|
+static void sTrace(uSynergyContext *context, const char* text)
|
|
|
+{
|
|
|
+ // Don't trace if we don't have a trace function
|
|
|
+ if (context->m_traceFunc != 0L)
|
|
|
+ context->m_traceFunc(context->m_cookie, text);
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+
|
|
|
+/**
|
|
|
+@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, uint16_t modifiers, uSynergyBool down, uSynergyBool repeat)
|
|
|
+{
|
|
|
+ // Skip if no callback is installed
|
|
|
+ if (context->m_keyboardCallback == 0L)
|
|
|
+ return;
|
|
|
+
|
|
|
+ // Send callback
|
|
|
+ context->m_keyboardCallback(context->m_cookie, key, modifiers, 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
|
|
|
+ char buffer[256+1];
|
|
|
+ sprintf(buffer, "Connected as client \"%s\"", context->m_clientName);
|
|
|
+ sTrace(context, buffer);
|
|
|
+ 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, mod, USYNERGY_TRUE, USYNERGY_FALSE);
|
|
|
+ }
|
|
|
+ else if (USYNERGY_IS_PACKET("DKRP"))
|
|
|
+ {
|
|
|
+ // Key repeat
|
|
|
+ // kMsgDKeyRepeat = "DKRP%2i%2i%2i%2i"
|
|
|
+ // kMsgDKeyRepeat1_0 = "DKRP%2i%2i%2i"
|
|
|
+ uint16_t mod = sNetToNative16(message+10);
|
|
|
+// uint16_t count = sNetToNative16(message+12);
|
|
|
+ uint16_t key = sNetToNative16(message+14);
|
|
|
+ sSendKeyboardCallback(context, key, mod, USYNERGY_TRUE, USYNERGY_TRUE);
|
|
|
+ }
|
|
|
+ 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, mod, USYNERGY_FALSE, USYNERGY_FALSE);
|
|
|
+ }
|
|
|
+ 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"
|
|
|
+ char buffer[64];
|
|
|
+ sprintf(buffer, "Unknown packet '%c%c%c%c'", message[4], message[5], message[6], message[7]);
|
|
|
+ sTrace(context, buffer);
|
|
|
+ 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 + context->m_receiveOfs, receive_size, &num_received) == USYNERGY_FALSE)
|
|
|
+ {
|
|
|
+ /* Receive failed, let's try to reconnect */
|
|
|
+ char buffer[128];
|
|
|
+ sprintf(buffer, "Receive failed (%d bytes asked, %d bytes received), trying to reconnect in a second", receive_size, num_received);
|
|
|
+ sTrace(context, buffer);
|
|
|
+ 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 */
|
|
|
+ char buffer[128];
|
|
|
+ sprintf(buffer, "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);
|
|
|
+ sTrace(context, buffer);
|
|
|
+ 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, "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)
|
|
|
+ {
|
|
|
+ char buffer[128];
|
|
|
+ sprintf(buffer, "Clipboard buffer too small, clipboard truncated at %d characters", max_length);
|
|
|
+ sTrace(context, buffer);
|
|
|
+ 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);
|
|
|
+}
|
omar