#!/usr/bin/perl

use strict;

use warnings;

use IO::Poll;

use IO::Socket::IP;

use Socket qw( SOCK_STREAM );

use Getopt::Long;

GetOptions(

   'timeout=f' => \my $TIMEOUT,

) or exit 1;

my $host    = shift @ARGV or die "Need HOST\n";

my $service = shift @ARGV or die "Need SERVICE\n";

my $socket = IO::Socket::IP->new(

   PeerHost    => $host,

   PeerService => $service,

   Type        => SOCK_STREAM,

   Timeout     => $TIMEOUT,

) or die "Cannot connect to $host:$service - $@";

printf STDERR "Connected to %s:%s\n", $socket->peerhost_service;

my $poll = IO::Poll->new;

$poll->mask( \*STDIN => POLLIN );

$poll->mask( $socket => POLLIN );

while(1) {

   $poll->poll( undef );

   if( $poll->events( \*STDIN ) ) {

      my $ret = STDIN->sysread( my $buffer, 8192 );

      defined $ret or die "Cannot read STDIN - $!\n";

      $ret or last;

      $socket->syswrite( $buffer );

   }

   if( $poll->events( $socket ) ) {

      my $ret = $socket->sysread( my $buffer, 8192 );

      defined $ret or die "Cannot read socket - $!\n";

      $ret or last;

      STDOUT->syswrite( $buffer );

   }

}