#!perl -w
use strict;
use IO::Socket::INET;
my $channel_id = open_channel("127.0.0.1", "7777");
send_command($channel_id, "dir");
sub open_channel {
	# create a connecting socket
	my $host = shift;
	my $port = shift;
	if ( $host !~ m/(\d+)\.(\d+)\.(\d+).(\d+)/i ) {
        print "IP Address:'$host' is not a Valid IP-Address.";
        return 139;
    }
	my $socket = new IO::Socket::INET (
		PeerHost => $host,
		PeerPort => $port,
		Proto => 'tcp',
	);
	die "cannot connect to the server $!\n" unless $socket;
	
	if ( !defined $socket ) {
		print "Opening TCP Channel to host: $host and Port: $port Failed !!";
		return 138;
	}
	else {

		$socket->send("Check Connectivity");
		while (1) {
			my $recieved_data= <$socket>;
			if ( defined $recieved_data ) {
				chomp($recieved_data);
				if ($recieved_data =~ /Connected to TCP socket server/i){
					print "TCP Connection established with Channel id: '$socket'\n";
					return $socket;
					
				}
				else{
					print "Cannot craete connection with server\n";

					return 137;
				}
			}
		}
		#$socket->close();
	}
 }
sub send_command {
	my $channel_id = shift;
	my $command_to_send = shift;
	print "In send_command  sub-routine:-Channel_id: '$channel_id' and command: '$command_to_send'";
	$| = 1;
	chomp($command_to_send);
	print $channel_id $command_to_send."\n";
	while (1) {
		my $recieved_data = <$channel_id>;
		if ( defined $recieved_data ) {
			chomp($recieved_data);
			print "recieved_data=======>$recieved_data\n";
			if ( $recieved_data =~ m/^done/i ) {
				return 0;
			}
		}
	}
	#$channel_id->close();
}