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#!/usr/bin/perl
# whois_hexip irssi module
# written by Michael Kowalchuk <michael_kowalchuk@umanitoba.ca>
#
# Every time a WHOIS or WHOWAS is run, this script checks the
# ident and realname for a hex encoded IP address, then decodes
# it, optionally reverses it, and adds it to the printed WHOIS
# result. Useful for looking at CGI::IRC clients.
#
# dns lookups are blocking, so if you find them to be slow, disable
# lookups with the whois_hexip_lookup option.
#
# usage:
#
# put this script into your autorun directory and/or load it with
# /SCRIPT LOAD whois_hexip
#
# there is 1 setting:
# /set whois_hexip_lookup ON/OFF
#
# lookup means attempt to get the hostname; if it is off you will
# only get the IP address
#
#
# changes:
# 24.12.2005 fix msg levels so the hexip won't end up in the wrong win
# 10.10.2005 allowed idents to start with ~
# 07.09.2005 limit to 32 bit numbers
# 28.07.2005 changed realname matching to look for 0 or 1 non-word
# characters on either side of the hexadecimal number
# for less false-positives
# 13.07.2005 added max_realname_nonhex
# 12.07.2005 initial release
#
use strict;
use Irssi;
use Socket;
use vars qw($VERSION %IRSSI);
$VERSION = "1.4";
%IRSSI = (
authors => "Michael Kowalchuk",
contact => "michael_kowalchuk\@umanitoba.ca",
name => "whois_hexip",
description => "Every time a WHOIS or WHOWAS is run, this script checks the ident and realname for a hex encoded IP address, then decodes it, reverses it, and adds it to the printed WHOIS/WHOWAS result. Useful for looking at CGI::IRC clients.",
license => "MIT",
url => "http://home.cc.umanitoba.ca/~umkowa17/junk/whois_hexip.pl",
changed => "12.24.2005",
);
my $hexreg = "[A-Fa-f0-9]+";
sub event_server_event {
my ($server, $text) = @_;
# Look up the ident and whois
my @items = split(/ /,$text);
my $ident = $items[2];
$ident =~ s/^~//;
# CGI::IRC can put the IP in the WHOIS too! Thanks mef
my $whois = join(" ", @items[5 .. @items] );
$whois =~ s/^://; # Remove the initial :
$whois =~ s/\s+$//; # and any trailing whitespace
# Set $num to whatever string holds the hex ip, with
# priority given to the ident
my @numarray = undef;
@numarray = ($ident =~ /^\~?($hexreg)$/ );
@numarray = ($whois =~ /^($hexreg)$/) if @numarray eq 0;
@numarray = ($whois =~ /^[^\w]($hexreg)[^\w]$/) if @numarray eq 0;
my $num = $numarray[0] if @numarray gt 0;
if( $num and length($num) <= 8 ) {
my $ip = inet_aton(hex $num);
my $display = gethostbyaddr($ip, AF_INET)
if Irssi::settings_get_bool($IRSSI{'name'}."_lookup");
# If there's a DNS timeout rather than an NXDOMAIN,
# you get an empty string rather than undefined
if( not defined $display or ( $display eq "" ) ) {
$display = inet_ntoa($ip)
}
$server->printformat($items[1], MSGLEVEL_CRAP, $IRSSI{'name'},
$items[1], $display );
}
}
Irssi::theme_register([$IRSSI{'name'} => '{whois hexip %|$1}']);
Irssi::signal_add_last('event 311', 'event_server_event'); # WHOIS
Irssi::signal_add_last('event 314', 'event_server_event'); # WHOWAS
Irssi::settings_add_bool('misc', $IRSSI{'name'} . '_lookup', 1);
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