Winsock problem..

[oops]

Any idea whats wrong with this code:

#include <windows.h>
#include <winsock.h>
#include <string.h>
#include <stdlib.h>
#include "resource.h"

#define MESSAGE "Hello, Client -!\n" //Connection Message

//Global varables to store port numbers
char portNum[6];
int port;

BOOL MainDialog_OnCommand(HWND, WORD, WORD, HWND);     
BOOL MainDialogProc(HWND, UINT, WPARAM, LPARAM); 

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE, LPSTR, int)
{
	DialogBoxParam(hInstance, MAKEINTRESOURCE(IDD_DIALOG1), NULL, (DLGPROC)MainDialogProc, 0);
	return 0;
}

BOOL MainDialogProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
	switch (uMsg)
	{
	case WM_COMMAND:
		return MainDialog_OnCommand(hWnd, LOWORD(wParam),HIWORD(wParam), (HWND)lParam);

	case WM_CLOSE:
		EndDialog(hWnd, 0);
		return TRUE;
	}
	return FALSE;
}

BOOL MainDialog_OnCommand(HWND hWnd, WORD wCommand, WORD wNotify, HWND hControl)
{
	switch (wCommand)
	{
	case IDC_BUTTON1:

		GetDlgItemText(hWnd, IDC_EDIT1, portNum, 6);
		port = atoi ((char *) &portNum);

		WSADATA wsda; //Structure to restore info returned from WSAStartup()

		char szRepMessage[80]; //Place to hold the reply message
		int iMessageLen;

		int ret; //Return values

		char szInBuffer[128];
		int iBufferLen;

		int iPort, iAddrLen;
		iPort = port;

		SOCKET sListen, sClient; //TCP socket Handle
		SOCKADDR_IN addr,        //Local interface
				remote_addr;	 //Address of the connecting host

		if(iPort < 0 || iPort> 65535) 
		{
			MessageBox(NULL, "Port Range: 0 - 65535", "Error", MB_OK);
			break;
		}

		strcpy(szRepMessage, MESSAGE);
		iMessageLen = strlen(szRepMessage);

		WSAStartup(MAKEWORD(1,1), &wsda); //Load winsock 1.1

		SetDlgItemText(hWnd, IDC_EDIT1, "Creating socket...\n");
		sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP); //Create Socket

		//Check for error
		if(sListen == SOCKET_ERROR)
		{
			SetDlgItemText(hWnd, IDC_EDIT1, "Call To socket failed with some ****\n");
			break;
		}

		SetDlgItemText(hWnd, IDC_EDIT1, "OK\n");
		SetDlgItemText(hWnd, IDC_EDIT1, "Binding socket to X...\n");

		addr.sin_family = AF_INET;
		addr.sin_port = htons(iPort);
		addr.sin_addr.s_addr = htonl(INADDR_ANY); //Listen on any available interface

		ret = bind(sListen, (struct sockaddr *) &addr, sizeof(addr));

		//Check for another error
		if(ret == SOCKET_ERROR)
		{
			SetDlgItemText(hWnd, IDC_EDIT1, "Call to bind socket ****ed up :(\n");
			break;
		}

		SetDlgItemText(hWnd, IDC_EDIT1, "OK\n");
		SetDlgItemText(hWnd, IDC_EDIT1, "Putting socket into listening mode...\n");

		ret = listen(sListen, 10); //Backlog 10

		//Check for another error
		if(ret == SOCKET_ERROR)
		{
			SetDlgItemText(hWnd, IDC_EDIT1, "Call to listen failed...\n");
			break;
		}

		SetDlgItemText(hWnd, IDC_EDIT1, "OK\n");
		SetDlgItemText(hWnd, IDC_EDIT1, "Waiting for Connections...\n");

		iAddrLen = sizeof(remote_addr);

		sClient = accept(sListen, (struct sockaddr *) &remote_addr, &iAddrLen);

		//Check for errors (again)
		if(sClient == SOCKET_ERROR)
		{
			SetDlgItemText(hWnd, IDC_EDIT1, "Call to accept failed...\n");
			break;
		}

		SetDlgItemText(hWnd, IDC_EDIT1, "Connected...\n");

		//Receive Data
		SetDlgItemText(hWnd, IDC_EDIT1, "Waiting for a response...\n");
		ret = recv(sClient, szInBuffer, sizeof(szInBuffer), 0);

		if(ret == SOCKET_ERROR)
		{
			SetDlgItemText(hWnd, IDC_EDIT1, "Call to recv failed...\n");
			break;
		}

		SetDlgItemText(hWnd, IDC_EDIT1, "Response received...\n");
		
		iBufferLen = ret; //recv() returns the number of bytes read

		szInBuffer[iBufferLen] = '\0'; //Convert to CString

		SetDlgItemText(hWnd, IDC_EDIT1, "Data received...\n");

		//Ready to send data

		SetDlgItemText(hWnd, IDC_EDIT1, "Sending reply...\n");

		ret = send(sClient, szRepMessage, iMessageLen, 0);

		//Check for yet another ****ing error
		if(ret == SOCKET_ERROR)
		{
			SetDlgItemText(hWnd, IDC_EDIT1, "Call to send failed...\n");
			break;
		}

		SetDlgItemText(hWnd, IDC_EDIT1, "OK\n");
		SetDlgItemText(hWnd, IDC_EDIT1, "Closing socket...\n");
		
		closesocket(sClient);

		SetDlgItemText(hWnd, IDC_EDIT1, "Closed...\n");

		return 0;
		
		break;
		
	case IDCANCEL:
		EndDialog(hWnd, wCommand);
		break;
	}
	return TRUE;
}

For some reason, this code hangs when i try to run the compiled program..No errors pop up, the program just hangs..Just wondering if you guys can spot anything wrong with ym code..

[redhead]

What do you mean, it just hangs ?

You're not getting any messages or anything from it ?
Or you are getting messages, but it never comes past the accept(...) part ?
You do know, befor you can go on from that line, there has to be a client connecting on the port, this is listening from. (addr.sin_port) Else accept() will never return.

[oops]

No worries man..I got it fixed..Damn Backlog was making it hang..

YEah, the accept is fine..I have a client i wrote continuously making connection attempts in a loop
Thanks for the help.