/**************************************************************************** * graphics/vnc/server/vnc_server.h * * Copyright (C) 2016 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ #ifndef __GRAPHICS_VNC_SERVER_VNC_SERVER_H #define __GRAPHICS_VNC_SERVER_VNC_SERVER_H /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Configuration */ #ifndef CONFIG_VNCSERVER_NDISPLAYS # define CONFIG_VNCSERVER_NDISPLAYS 1 #endif #ifndef CONFIG_VNCSERVER_PRIO # define CONFIG_VNCSERVER_PRIO 100 #endif #ifndef CONFIG_VNCSERVER_STACKSIZE # define CONFIG_VNCSERVER_STACKSIZE 2048 #endif /* RFB Port Number */ #define RFB_PORT_BASE 5900 #define RFB_MAX_DISPLAYS CONFIG_VNCSERVER_NDISPLAYS #define RFB_DISPLAY_PORT(d) (RFB_PORT_BASE + (d)) /**************************************************************************** * Public Types ****************************************************************************/ /* This enumeration indicates the state of the VNC server */ enum vnc_server_e { VNCSERVER_UNINITIALIZED = 0, /* Initial state */ VNCSERVER_INITIALIZED, /* State structured initialized, but not connected */ VNCSERVER_CONNECTED, /* Connect to a client, but not yet configured */ VNCSERVER_CONFIGURED, /* Configured and ready to transfer graphics */ VNCSERVER_SCANNING, /* Running and activly transferring graphics */ VNCSERVER_STOPPING /* The server has been asked to stop */ }; struct vnc_session_s { /* NX graphics system */ NXHANDLE handle; /* NX graphics handle */ /* Connection data */ struct socket listen; /* Listen socket */ struct socket connect; /* Connected socket */ volatile uint8_t state; /* See enum vnc_server_e */ /* Display geometry and color characteristics */ uint8_t colorfmt; /* See include/nuttx/fb.h */ uint8_t bpp; /* Bits per pixel */ struct nxgl_size_s screen; /* Size of the screen in pixels x rows */ FAR uint8_t *fb; /* Allocated local frame buffer */ }; /**************************************************************************** * Public Function Prototypes ****************************************************************************/ #ifdef __cplusplus #define EXTERN extern "C" extern "C" { #else #define EXTERN extern #endif /**************************************************************************** * Name: vnc_server * * Description: * The VNC server daemon. This daemon is implemented as a kernel thread. * * Input Parameters: * Standard kernel thread arguments (all ignored) * * Returned Value: * This function does not return. * ****************************************************************************/ int vnc_server(int argc, FAR char *argv[]); /**************************************************************************** * Name: vnc_connect * * Description: * Wait for a connection from the VNC client * * Input Parameters: * session - An instance of the session structure allocated by * vnc_create_session(). * port - The listen port to use * * Returned Value: * Returns zero (OK) on success; a negated errno value on failure. * ****************************************************************************/ int vnc_connect(FAR struct vnc_session_s *session, int port); /**************************************************************************** * Name: vnc_create_session * * Description: * Create a new, unconnected session * * Input Parameters: * None * * Returned Value: * On success, this function returns the allocated and initialize session * structure. NULL is returned on failure. * ****************************************************************************/ FAR struct vnc_session_s *vnc_create_session(void); /**************************************************************************** * Name: vnc_release_session * * Description: * Conclude the current VNC session and free most resources. This function * re-initializes the session structure; it does not free it so that it * can be re-used. * * Input Parameters: * session - An instance of the session structure allocated by * vnc_create_session(). * * Returned Value: * None * ****************************************************************************/ void vnc_release_session(FAR struct vnc_session_s *session); /**************************************************************************** * Name: vnc_session * * Description: * This function encapsulates the entire VNC session. * * Input Parameters: * session - An instance of the session structure allocated by * vnc_create_session(). * * Returned Value: * At present, always returns OK * ****************************************************************************/ int vnc_session(FAR struct vnc_session_s *session); /**************************************************************************** * Name: vnc_find_session * * Description: * Return the session structure associated with this display. * * Input Parameters: * display - The display number of interest. * * Returned Value: * Returns the instance of the session structure allocated by * vnc_create_session() for this display. NULL will be returned if the * server has not yet been started or if the display number is out of * range. * ****************************************************************************/ FAR struct vnc_session_s *vnc_find_session(int display); #undef EXTERN #ifdef __cplusplus } #endif #endif /* __GRAPHICS_VNC_SERVER_VNC_SERVER_H */