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#!/usr/bin/perl
#(c)2007-2009 Hurricane Labs
#Author: Billford
#License: See LICENSE file GPL v2
#Nagzilla Jabber Relay Bot Server
#import our required Perl modules
require Config::Simple;
require Data::Dumper;
require Log::LogLite;
use IO::Socket;
use IO::Socket::INET;
use IO::Select;
use Net::Jabber qw(Client);
use Net::Jabber qw(Message);
use Net::Jabber qw(Protocol);
use Net::Jabber qw(Presence);
#Point me to your nagzillad.pl directory
$CONFDIR = "/etc/nagzillad";
# DO NOT EDIT ANYTHING BEYOND THIS POINT!!
$0.=''; # so that the init script is able to detect the process
$0.=''; # so that the init script is able to detect the process
##############Config File Setup#####################
Config::Simple->import_from('nagzillad.cfg', \%Config);
$cfg = new Config::Simple("$CONFDIR/nagzillad.cfg");
#Nagzillad Server Settings
$bindaddr = $cfg->param("BindAddr");
$bindport = $cfg->param("BindPort");
$binduser = $cfg->param("BindUser");
$daemon = $cfg->param("Daemon");
$to_log = $cfg->param("To_Log");
$LOG_DIRECTORY = $cfg->param("Log_Directory");
$ERROR_LOG_LEVEL = $cfg->param("Error_Log_Level");
#Nagzillad Access Control
@allowedipaddr = $cfg->param("AllowedIPAddr");
#Jabber Server Settings
$jabberserver = $cfg->param("JabberServer");
$jabberport = $cfg->param("JabberPort");
$jabberdebug = $cfg->param("JabberDebug");
$jabbertls = $cfg->param("JabberTLS");
$jabberssl = $cfg->param("JabberSSL");
$jabbersasl = $cfg->param("JabberSASL");
$jabberuser = $cfg->param("JabberUser");
$jabberpass = $cfg->param("JabberPass");
$jabberresource = $cfg->param("JabberResource");
$jabbermaxwait = $cfg->param("JabberMaxWait");
#conference server settings
$confserver = $cfg->param("ConfServer");
@confrooms = $cfg->param("ConfRooms");
$confnick = $cfg->param("ConfNick");
@roominess = @confrooms;
###########End Config Setup#####################
my $log = new Log::LogLite( $LOG_DIRECTORY . "/nagzillad.log", $ERROR_LOG_LEVEL );
###########Function Setups#######################
# make_access_checker - returns a function which checks if an IP address
# should be allowed to connect to this nagzillad.
#
# It takes a reference to an an array of IP addresses (dotted quad strings).
#
# It returns a function which takes an IP address (also a dotted quad
# string). That function will return 1 if the IP address is allowed and
# undef if it isn't.
#
sub make_access_checker {
my $ok_addrs = shift;
my %ok_addr_set = map { $_ => 1 } @{$ok_addrs};
return sub {
my $addr = shift;
return $ok_addr_set{$addr};
}
}
my $check_access = make_access_checker(\@allowedipaddr);
sub send_plain_chat {
our $message = Net::Jabber::Message->new();
$message->SetMessage(
"type" => $style,
"to" => $roomy =~ /@/ ? $roomy : "$roomy\@$confserver",
"body" => $mess
);
}#end send_plain_chat
sub send_color_chat {
#make some pretty colors
if ($col eq "red"){
$col = "\#ff0c00\;";
}elsif ($col eq "yellow"){
$col = "\#fff00\;";
}elsif ($col eq "green"){
$col = "\#00ff00\;";
}elsif ($col eq ""){
$col = "\#000000\;";
};
our $message = Net::Jabber::Message->new();
my $bod = "<body>hello</body><html xmlns='http://jabber.org/protocol/xhtml-im'><body xmlns='http://www.w3.org/1999/xhtml'><span style='font-family: Helvetica; font-size: medium; color: $col'>$mess</span></body></html>";
$message->RemoveBody();
$bod =~ s/^\^</</;
$message->SetMessage(
"type" => $style,
"to" => $roomy =~ /@/ ? $roomy : "$roomy\@$confserver"
);
$message->InsertRawXML($bod);
}#end send_color_chat
sub PresenceReceived
{
my ($sid, $presence) = @_;
my $from = $presence->GetFrom();
my $type = $presence->GetType();
return "" if ($type eq '');
$log->write( "Received presence notification of type '$type' from '$from'", 5 );
if ($type eq 'subscribe')
{
$connection->Subscription
(
type => 'subscribed',
to => $from
);
}
elsif ($type eq 'unsubscribe')
{
$connection->Subscription
(
type => 'unsubscribed',
to => $from
);
}
$connection->PresenceSend();
}#End PresenceReceived
##########End Function Setups###################
#taken from a Perl tutorial somewhere a million years ago so direct reference escapes me.
sub daemonize {
chdir '/' or die "Can't chdir to /: $!";
open STDIN, '/dev/null' or die "Can't read /dev/null: $!";
open STDOUT, '>>/dev/null' or die "Can't write to /dev/null: $!";
open STDERR, '>>/dev/null' or die "Can't write to /dev/null: $!";
defined( my $pid = fork ) or die "Can't fork: $!";
#setsid - from McMaster's salvia;
if( $pid != 0 ) {
open( PIDFILE, '>/var/run/nagzillad.pid' );
print PIDFILE "$pid\n";
close(PIDFILE);
chown $uid, 0, "/var/run/nagzillad.pid";
chmod oct("0644"), "/var/run/nagzillad.pid";
# Change user ID - automagically
my $uid = ( getpwnam('nobody') )[2];
$> = $uid;
exit(0);
}
setsid or die "Can't start a new session: $!";
umask 0;
}
if ($daemon eq 1) {
&daemonize;
# Change user ID - automagically
my $uid = ( getpwnam('nobody') )[2];
$> = $uid;
}
#Let's make us a socket
$local = IO::Socket::INET->new(
Proto => 'tcp',
LocalAddr => $bindaddr,
LocalPort => $bindport,
Reuse => 1
) or die "$!";
$local->listen(); #Tell our socket to listen
#This is on by default with newer versions of IO::Socket but for bc let's turn it on anyway
$local->autoflush(1);
if ($to_log eq 1) {
$log->write( "Nagzillad Server Started", 5 );
}
#Start Jabber Stuff
# Creates a new connection to the jabber server
our $connection = Net::Jabber::Client->new( debugLevel => $jabberdebug );
$connection->Connect(
"hostname" => $jabberserver,
"port" => $jabberport,
"tls" => $jabbertls,
"ssl" => $jabberssl
) or die "Cannot connect ($!)\n"; #Return an error on failure
my @result;
if ($jabbersasl) {
@result = $connection->AuthSend(
"username" => $jabberuser,
"password" => $jabberpass,
"resource" => $jabberresource
);
} else {
@result = $connection->AuthIQAuth(
"username" => $jabberuser,
"password" => $jabberpass,
"resource" => $jabberresource
);
}
$connection->PresenceSend();
if ($result[0] ne "ok") {
#Send an auth request, return on failure
die "Ident/Auth with server failed: $result[0] - $result[1]\n";
}
#Allow the daemon to hang out in as many rooms as needed (defined in config file)
#Depending on your Jabber server setup specifying a non-existent room will create that room
foreach $confs (@confrooms) {
my $room = $connection->MUCJoin(
room => "$confs",
server => "$confserver", #Conference server
nick => "$confnick"
); #Join a room
}
$connection->SetCallBacks
(
presence => \&PresenceReceived
);
$readable_handles = new IO::Select();
$readable_handles->add($local);
while (1) {
($new_readable) = IO::Select->select( $readable_handles, undef, undef, undef );
foreach $sock (@$new_readable) {
if ($sock == $local) {
$new_sock = $sock->accept();
my $client_name = $new_sock->peeraddr;
$ip = inet_ntoa($client_name);
next if not defined $new_sock;
# check if the new peer's IP address is permitted via
# the AllowedIPAddr conf statement.
if ($check_access->($ip)) {
$log->write("accepted connection from $ip",1);
$readable_handles->add($new_sock);
} else {
$log->write("rejected connection from $ip - not in AllowedIPAddr",5);
close $new_sock;
}
} else {
$buf = <$sock>;
$readable_handles->remove($sock);
close $sock;
if ($buf) {
our ( $style, $roomy, $mess, $col ) = split( /\^/, $buf, 4 );
if ($style && $roomy && $mess) {
send_color_chat( $style, $roomy, $mess, $col );
$connection->Process();
}
}
# dirty hack to allow RawXML: message text starting off with ^<,
# strip off the ^
if ($mess =~ /^\^</) {
$log->write("--RawXML-- $style for $roomy ", 10);
$message->RemoveBody();
$mess =~ s/^\^</</;
$message->InsertRawXML($mess);
}
#Send message from STDIN -- probably should add some error handling
#There is some bug in at least ejabberd that causes messages to
#be sent "offline". They get flushed on nagzilla restart
#I don't know of a good way to check if this is happening yet
#More to come - BM
$connection->Send($message);
if ($to_log eq 1) {
$log->write( "--$mess-- sent to $roomy from $ip", 5 );
}
}
}
}
#Creates a sleep timer so many messages can be handled without issue
#sleep(MAXWAIT);
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