Simple TCP/IP server for VC ++ socket programming

Simple TCP/IP server for VC ++ socket programming

# Include <windows. h>
# Include <iostream. h>
# Include <Winsock. h>

# Define no_flags_set 0

# Define Port (u_short) 44965
# Define maxbuflen 256

Int main (void)
{
Wsadata data;
Sockaddr_in serversockaddr;
Sockaddr_in clientsockaddr;
Socket serversocket;
Socket clientsocket;
Int addrlen = sizeof (sockaddr_in );
Int status;
Int numrcv;
Char buffer [maxbuflen];

/* Initialize the Windows Socket DLL */
Status = wsastartup (makeword (1, 1), & data );
If (status! = 0)
Cerr <"error: wsastartup unsuccessful"
<Endl;

/* Zero the sockaddr_in structure */
Memset (& serversockaddr, 0,
Sizeof (serversockaddr ));
/* Specify the port portion of the address */
Serversockaddr. sin_port = htons (port );
/* Specify the address family as Internet */
Serversockaddr. sin_family = af_inet;
/* Specify that the address does not matter */
Serversockaddr. sin_addr.s_addr = htonl (inaddr_any );

/* Create a socket */serversocket = socket (af_inet, sock_stream, 0 );
If (serversocket = invalid_socket)
Cerr <"error: Socket unsuccessful" <Endl;

/* Associate the socket with the address */
Status = BIND (serversocket,
(Lpsockaddr) & serversockaddr,
Sizeof (serversockaddr ));
If (status = socket_error)
Cerr <"error: bind unsuccessful" <Endl;

/* Allow the socket to take connections */
Status = listen (serversocket, 1 );
If (status = socket_error)
Cerr <"error: Listen unsuccessful" <Endl;

/* Accept the connection request when one
Is already ed */
Clientsocket = accept (serversocket,
(Lpsockaddr) & clientsockaddr,
& Addrlen );

Cout <"got the connection..." <Endl;

While (1)
{
Numrcv = Recv (clientsocket, buffer,
Maxbuflen, no_flags_set );
If (numrcv = 0) | (numrcv = socket_error ))
{
Cout <"Connection terminated." <Endl;
Status = closesocket (clientsocket );
If (status = socket_error)
Cerr <"error: closesocket unsuccessful"
<Endl;
Status = wsacleanup ();
If (status = socket_error)
Cerr <"error: wsacleanup unsuccessful"
<Endl;
Return (1 );
}
Cout <buffer <Endl;
}/* While */