perl function send

The send function in Perl is used to send a message to a socket. Here's an example of using send to send a message to a remote server:

use strict;
use warnings;
use IO::Socket::INET;

my $host = 'example.com';
my $port = 12345;
my $data = 'Hello, server!';

my $socket = IO::Socket::INET->new(
    PeerAddr => $host,
    PeerPort => $port,
    Proto    => 'tcp'
) or die "Could not create socket: $!\n";

send($socket, $data, 0) or die "Send error: $!\n";

print "Message sent: $data\n";

close $socket;

In this example, we first specify the hostname and port number of the remote server, as well as the data to be sent. We then create a new TCP socket using the IO::Socket::INET module, which connects to the remote server using the PeerAddr and PeerPort options.

Next, we call the send function to send the data to the server. The first argument to send is the socket handle, the second argument is the data to be sent, and the third argument is a set of flags (in this case, 0).

If an error occurs during the send operation, the die function is called to print an error message.

Finally, we print a message indicating that the message was sent, and close the socket.

Note that the send function may not send the entire message at once, depending on the size of the data and the buffer size of the socket. To ensure that the entire message is sent, you may need to call send multiple times or use a loop.