对于这个文件，原始内容是基于SEEGGER的embOS实现的：
#include
#include "IP.h" // BSD socket interface
#include "RTOS.H" // embOS header
#include "GUI.h"
#include "GUI_VNC.h"
/*********************************************************************
*
* Static data
*
**********************************************************************
*/
static GUI_VNC_CONTEXT _Context;
static struct sockaddr_in _Addr;
//
// embOS Stack area of the server
//
static OS_STACKPTR int _StackVNCServer[1000];
//
// embOS Task-control-block of the server
//
static OS_TASK _VNCServer_TCB;
/*********************************************************************
*
* Static functions
*
**********************************************************************
*/
/*********************************************************************
*
* _Send
*
* Function description
* This function is called indirectly by the server; it's address is passed to the actual
* server code as function pointer. It is needed because the server is independent
* of the TCP/IP stack implementation, so details for the TCP/IP stack can be placed here.
*/
static int _Send(const U8 * buf, int len, void * pConnectionInfo) {
int r;
r = send((long)pConnectionInfo, (const char *)buf, len, 0);
return r;
}
/*********************************************************************
*
* _Recv
*
* Function description
* This function is called indirectly by the server; it's address is passed to the actual
* server code as function pointer. It is needed because the server is independent
* of the TCP/IP stack implementation, so details for the TCP/IP stack can be placed here.
*/
static int _Recv(U8 * buf, int len, void * pConnectionInfo) {
return recv((long)pConnectionInfo, (char *)buf, len, 0);
}
/*********************************************************************
*
* _ListenAtTcpAddr
*
* Starts listening at the given TCP port.
*/
static int _ListenAtTcpAddr(U16 Port) {
int sock;
struct sockaddr_in addr;
sock = socket(AF_INET, SOCK_STREAM, 0);
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(Port);
addr.sin_addr.s_addr = INADDR_ANY;
bind(sock, (struct sockaddr *)&addr, sizeof(addr));
listen(sock, 1);
return sock;
}
/*********************************************************************
*
* _ServerTask
*
* Function description
* This routine is the actual server task.
* It executes some one-time init code, then runs in an ednless loop.
* It therefor does not terminate.
* In the endless loop it
* - Waits for a conection from a client
* - Runs the server code
* - Closes the connection
*/
static void _ServerTask(void) {
int s, Sock, AddrLen;
U16 Port;
//
// Prepare socket (one time setup)
//
Port = 5900 + _Context.ServerIndex; // Default port for VNC is is 590x, where x is the 0-based layer index
//
// Loop until we get a socket into listening state
//
do {
s = _ListenAtTcpAddr(Port);
if (s != -1) {
break;
}
OS_Delay(100); // Try again
} while (1);
//
// Loop once per client and create a thread for the actual server
//
while (1) {
//
// Wait for an incoming connection
//
AddrLen = sizeof(_Addr);
if ((Sock = accept(s, (struct sockaddr*)&_Addr, &AddrLen)) == SOCKET_ERROR) {
continue; // Error
}
//
// Run the actual server
//
GUI_VNC_Process(&_Context, _Send, _Recv, (void *)Sock);
//
// Close the connection
//
closesocket(Sock);
memset(&_Addr, 0, sizeof(struct sockaddr_in));
}
}
/*********************************************************************
*
* Public code
*
**********************************************************************
*/
/*********************************************************************
*
* GUI_VNC_X_StartServer
*
* Function description
* To start the server, the following steps are executed
* - Make sure the TCP-IP stack is up and running
* - Init the server context and attach it to the layer
* - Start the thread (task) which runs the VNC server
* Notes:
* (1) The first part of the code initializes the TCP/IP stack. In a typical
* application, this is not required, since the stack should have already been
* initialized some other place.
* This could be done in a different module. (TCPIP_AssertInit() ?)
*/
int GUI_VNC_X_StartServer(int LayerIndex, int ServerIndex) {
//
// Init VNC context and attach to layer (so context is updated if the display-layer-contents change
//
GUI_VNC_AttachToLayer(&_Context, LayerIndex);
_Context.ServerIndex = ServerIndex;
//
// Create task for VNC Server
//
OS_CREATETASK(&_VNCServer_TCB, "VNC Server", _ServerTask, 230, _StackVNCServer);
//
// O.k., server has been started
//
return 0;
}
/*********************************************************************
*
* GUI_VNC_X_StartServerFT
*
* Function description
* In addition to GUI_VNC_X_StartServer() it enables the RFB-protocoll extensions
* and sets an API-structure containing function pointers required for file access.
*/
int GUI_VNC_X_StartServerFT(int LayerIndex, int ServerIndex) {
//
// Enable file transfer extensions in RFB-protocoll
//
GUI_VNC_EnableFileTransfer(1);
//
// Set API-functions used for file access
//
GUI_VNC_SetFS_API(&IP_FS_FS);
//
// Call GUI_VNC_X_StartServer()
//
return GUI_VNC_X_StartServer(LayerIndex, ServerIndex);
}
/*********************************************************************
*
* GUI_VNC_X_getpeername
*
* Function description
* Retrieves the IP addr. of the currently connected VNC client.
*
* Return values
* IP addr. if VNC client connected
* 0 if no client connected
*/
void GUI_VNC_X_getpeername(U32 * Addr) {
*Addr = _Addr.sin_addr.s_addr;
}
/*************************** End of file **************************** |
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