420 lines
16 KiB
C
420 lines
16 KiB
C
/*
|
|
uSynergy client -- Interface for the embedded Synergy client library
|
|
version 1.0.0, July 7th, 2012
|
|
|
|
Copyright (C) 2012 Synergy Si Ltd.
|
|
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 */
|
|
|
|
|
|
|
|
/**
|
|
@brief Keyboard constants
|
|
**/
|
|
#define USYNERGY_MODIFIER_SHIFT 0x0001 /* Shift key modifier */
|
|
#define USYNERGY_MODIFIER_CTRL 0x0002 /* Ctrl key modifier */
|
|
#define USYNERGY_MODIFIER_ALT 0x0004 /* Alt key modifier */
|
|
#define USYNERGY_MODIFIER_META 0x0008 /* Meta key modifier */
|
|
#define USYNERGY_MODIFIER_WIN 0x0010 /* Windows key modifier */
|
|
#define USYNERGY_MODIFIER_ALT_GR 0x0020 /* AltGr key modifier */
|
|
#define USYNERGY_MODIFIER_LEVEL5LOCK 0x0040 /* Level5Lock key modifier */
|
|
#define USYNERGY_MODIFIER_CAPSLOCK 0x1000 /* CapsLock key modifier */
|
|
#define USYNERGY_MODIFIER_NUMLOCK 0x2000 /* NumLock key modifier */
|
|
#define USYNERGY_MODIFIER_SCROLLOCK 0x4000 /* ScrollLock key modifier */
|
|
|
|
|
|
|
|
|
|
//---------------------------------------------------------------------------------------------------------------------
|
|
// 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 modifiers Status of modifier keys (alt, shift, etc.)
|
|
@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, uint16_t modifiers, 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
|