Programming Perl, 4th Edition

bind

bind SOCKET, NAME

This function assigns a name to an unnamed but already-opened socket specified by the SOCKET filehandle so that other processes can find it. The function returns true if it succeeded, false otherwise. NAME should be a packed address of the proper type for the socket.

use Socket;
$port_number = 80;      # pretend we want to be a web server
$sockaddr = sockaddr_in($port_number, INADDR_ANY);
bind(SOCK, $sockaddr) || die "Can't bind $port_number: $!";

See bind(2). See also the examples in the section “Sockets” in Chapter 15. Normally, you should be using the higher-level interface to sockets provided by the standard IO::Socket module.