Metrologic Optimus S Programming Manual page 152

146 "C" Programming Guide For Optimus S/R
closesocket
memset (&name, 0, sizeof (name));
name.sin_family = AF_INET;
name.sin_port = htons (3000);
if (bind (s, (struct sockaddr*) &name, sizeof (name)) < 0) {
printf ("Error in Binding on socket: %d", s);
.....................
}
Description This routine binds the local IP address and listening port number information to
the socket specified.
For connection-oriented sockets (passive open), this routine must be called
before calling listen() and accept().
The socket specified must be a valid descriptor returned from a previous
call to the socket() routine.
The local IP address specified can be left out as 0. The application can use
getsockname() to learn the address and port that has been assigned to it.
If it is other than 0, this routine will verify this information against the
actual local IP address of the local terminal.
Return If successful, it returns 0.
On error, it returns -1.
The global variable errno is set to indicate the error condition encountered.
See Also connect, getsockname, listen, socket
Purpose To close a socket.
Syntax int closesocket (SOCKET s);
s
SOCKET s;
Example
..............
if (closesocket (s) < 0) {
printf ("closesocket fails on socket: %d", s);
...................
}
Description This function closes socket and releases the connection block.
Return If successful, it returns 0.
On error, it returns -1.
The global variable errno is set to indicate the error condition encountered.
shutdown, socket
See Also
Descriptor identifying a socket