ANTICHAT — форум по информационной безопасности, OSINT и технологиям

#include <WinSock2.h>
#pragma comment(lib, "ws2_32")

BOOL IsOnline()
{
	WSADATA wsd;
	WSAStartup(0x202, &wsd);

	SOCKET sck;
	SOCKADDR_IN addr;
	int rc;

	addr.sin_family = AF_INET;
	// standard http port
	addr.sin_port = htons(80);
	// mail.ru ip
	addr.sin_addr.S_un.S_addr = inet_addr("217.69.128.44");

	sck = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	rc = connect(sck, (LPSOCKADDR)&addr, sizeof(addr));

	if(rc == 0){
		closesocket(sck);
		return TRUE;
	}


	return FALSE;
}


int _tmain(int argc, _TCHAR* argv[])
{

	if(IsOnline()){
		MessageBox(0, "ONLINE", 0, 0);
	}else{
		MessageBox(0, "OFFLINE", 0, 0);
	}


	return 0;
}

#undef UNICODE
#include <winsock2.h>
#pragma comment( lib, "wsock32.lib" )
int main(int argc, char* argv[])
	{
	sockaddr_in s_a;
	WSADATA wd;
	WSAStartup( MAKEWORD( 2, 2 ), &wd );
	SOCKET s = socket( AF_INET, SOCK_STREAM, 0 );
	if (s == INVALID_SOCKET)
		{
		return 255;
		}
	s_a.sin_addr.s_addr = inet_addr( "217.69.128.44" );
	s_a.sin_port = htons( 80 );
	s_a.sin_family = AF_INET;
	if (connect( s, (struct sockaddr*)&s_a, sizeof( s_a ) ) == SOCKET_ERROR)
		{
		MessageBox(0,"OFFLINE!","Winname",MB_OK);
		}
	else
		{
		MessageBox(0,"ONLINE!!","Winname",MB_OK);
		}
	closesocket( s );
	WSACleanup();
	return 0;
	}