#!/usr/bin/perl 
require 5.002;
use strict;
BEGIN { $ENV{PATH} = '/usr/ucb:/bin' }
use Socket;
use Carp;

sub logmsg { print "$0 $$: @_ at ", scalar localtime, "\n" }

my $port = shift || 2345;
my $proto = getprotobyname('tcp');
$port = $1 if $port =~ /(\d+)/; # untaint port number

socket(Server, PF_INET, SOCK_STREAM, $proto)        || die "socket: $!";
setsockopt(Server, SOL_SOCKET, SO_REUSEADDR,
				 pack("l", 1))   || die "setsockopt: $!";
bind(Server, sockaddr_in($port, INADDR_ANY))        || die "bind: $!";
listen(Server,SOMAXCONN)                            || die "listen: $!"
;

logmsg "server started on port $port";

my $paddr;

# $SIG{CHLD} = \&REAPER;

for ( ; $paddr = accept(Client,Server); close Client) {
    my($port,$iaddr) = sockaddr_in($paddr);
    my $name = gethostbyaddr($iaddr,AF_INET);

    logmsg "connection from $name [",
	 inet_ntoa($iaddr), "]
	 at port $port";

    print Client "Hello there, $name, it's now ",
		 scalar localtime, "\n";
}
