perl function getnetbyaddr

The getnetbyaddr function in Perl is used to retrieve information about a network, identified by its IP address.

Here's an example of using getnetbyaddr in Perl:

#!/usr/bin/perl

use strict;
use warnings;
use Socket;

# IP address of the network we want to look up
my $ip_address = inet_aton("192.168.0.0");

# Look up the network information by IP address
my $net_info = getnetbyaddr($ip_address, AF_INET);

if (!$net_info) {
    die "Network $ip_address not found";
}

# Print the network information
print "Name: $net_info\n";

In this example, we use the inet_aton function from the Socket module to convert the IP address "192.168.0.0" to a binary format that can be used by getnetbyaddr. We then use getnetbyaddr to retrieve information about the network associated with this IP address. If the network is not found, we exit with an error message.

If the network is found, we print its name to the console.

When you run this script, it will print the name of the network associated with the IP address "192.168.0.0" to the console, assuming that such a network exists and can be looked up. If the network is not found, the script will exit with an error message.

Note that getnetbyaddr performs a lookup based on the IP address, so it may not be able to retrieve network information if the IP address does not correspond to a known network. Additionally, the specific behavior of getnetbyaddr may depend on the configuration of the system and the network services in use.