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Forráskód:

int WINAPI WinMain(HINSTANCE hThisInstance, HINSTANCE hPrevInstance, LPSTR lpszArgument, int nFunsterStil)

{

AllocConsole();

HANDLE handle_out = GetStdHandle(STD_OUTPUT_HANDLE);

int hCrt = _open_osfhandle((long) handle_out, _O_TEXT);

FILE* hf_out = _fdopen(hCrt, "w");

setvbuf(hf_out, NULL, _IONBF, 1);

*stdout = *hf_out;

HANDLE handle_in = GetStdHandle(STD_INPUT_HANDLE);

hCrt = _open_osfhandle((long) handle_in, _O_TEXT);

FILE* hf_in = _fdopen(hCrt, "r");

setvbuf(hf_in, NULL, _IONBF, 128);

*stdin = *hf_in;

// This stuff initializes winsock

WSAStartup(wVersionRequested, &wsaData);

// >>> Step #1 <<<

// Create a welcome socket

// - AF_INET is Address Family Internet and SOCK_STREAM is streams

welcome_s = socket(AF_INET, SOCK_STREAM, 0);

if (welcome_s < 0)

{

printf("*** ERROR - socket() failed \n");

exit(-1);

}

// >>> Step #2 <<<

// Fill-in server (my) address information and bind the welcome socket

server_addr.sin_family = AF_INET; // Address family to use

server_addr.sin_port = htons(PORT_NUM); // Port number to use

server_addr.sin_addr.s_addr = htonl(INADDR_ANY); // Listen on any IP address

retcode = bind(welcome_s, (struct sockaddr *)&server_addr,

sizeof(server_addr));

if (retcode < 0)

{

printf("*** ERROR - bind() failed \n");

exit(-1);

}

// >>> Step #3 <<<

// Listen on welcome socket for a connection

listen(welcome_s, 1);

// >>> Step #4 <<<

// Accept a connection. The accept() will block and then return with

// connect_s assigned and client_addr filled-in.

printf("Waiting for accept() to complete... \n");

addr_len = sizeof(client_addr);

connect_s = accept(welcome_s, (struct sockaddr *)&client_addr, &addr_len);

if (connect_s < 0)

{

printf("*** ERROR - accept() failed \n");

exit(-1);

}

// Copy the four-byte client IP address into an IP address structure

memcpy(&client_ip_addr, &client_addr.sin_addr.s_addr, 4);

// Print an informational message that accept completed

printf("Accept completed (IP address of client = %s port = %d) \n",

inet_ntoa(client_ip_addr), ntohs(client_addr.sin_port));

// >>> Step #5 <<<

// Send to the client using the connect socket

while(strcmp(out_buf, "END.")!=0)

{

DialogBox(hInst, MAKEINTRESOURCE(1001), NULL, Kiir);

SendText(out_buf);

}

// >>> Step #6 <<<

// Receive from the client using the connect socket

retcode = recv(connect_s, in_buf, sizeof(in_buf), 0);

if (retcode < 0)

{

printf("*** ERROR - recv() failed \n");

exit(-1);

}

printf("Received from client: %s \n", in_buf);

// >>> Step #7 <<<

// Close the welcome and connect sockets

retcode = closesocket(welcome_s);

if (retcode < 0)

{

printf("*** ERROR - closesocket() failed \n");

exit(-1);

}

retcode = closesocket(connect_s);

if (retcode < 0)

{

printf("*** ERROR - closesocket() failed \n");

exit(-1);

}

// Clean-up winsock

WSACleanup();

return 0;

}

BOOL CALLBACK Kiir(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)

{

char msg[500];

switch (message)

{

case WM_COMMAND:

switch (LOWORD (wParam))

{

case IDOK:

GetDlgItemText(hDlg, 2001, out_buf, 500);

EndDialog(hDlg, 0);

break;

}

return TRUE;

}

return FALSE ;

}

void SendText(char* out_buf)

{

retcode = send(connect_s, out_buf, (strlen(out_buf) + 1), 0);

if (retcode < 0)

{

printf("*** ERROR - send() failed \n");

exit(-1);

}

}

Az a baj, hogy neten keresztül nem érik el. Mi a baj?