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|
#!/usr/bin/perl -w
# ##############################################################################
# a simple IRC bot which dispatches messages received via local domain sockets
# ##############################################################################
######
## THIS NEEDS TO BE PORTED TO THE NEW FRAMEWORKS!
##
## STICKY POINTS: the addfh() function doesn't exist in BasicBot or POE::Component::IRC
##
## people suggested we use Anyevent::IRC and POE::Kernel ->select_read and POE::Wheel namespace
##
## in the meantime, inspiration for extensions can be found here: http://svn.foswiki.org/trunk/WikiBot/mozbot.pl
use strict;
use File::Basename;
BEGIN {
unshift @INC, dirname($0);
}
my $VERSION = '0.2';
my $running = 1;
# Read a configuration file
# The arg can be a relative or full path, or
# it can be a file located somewhere in @INC.
sub ReadCfg
{
my $file = $_[0];
our $err;
{ # Put config data into a separate namespace
package CFG;
# Process the contents of the config file
my $rc = do($file);
# Check for errors
if ($@) {
$::err = "ERROR: Failure compiling '$file' - $@";
} elsif (! defined($rc)) {
$::err = "ERROR: Failure reading '$file' - $!";
} elsif (! $rc) {
$::err = "ERROR: Failure processing '$file'";
}
}
return ($err);
}
# Get our configuration information
if (my $err = ReadCfg('/etc/nagios_nsa.cfg')) {
print(STDERR $err, "\n");
exit(1);
}
use POSIX qw(setsid);
use IO::Socket;
use Net::IRC;
sub new {
my $self = {
socket => undef,
irc => undef,
conn => undef,
commandfile => undef,
};
return bless($self, __PACKAGE__);
}
sub daemonize {
my $self = shift;
my $pid;
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: $!";
defined ($pid = fork) or die "Can't fork: $!";
if ($pid && $CFG::Nsa{'pidfile'}) { # write pid of child
open PID, ">$CFG::Nsa{'pidfile'}" or die "Can't open pid file: $!";
print PID $pid;
close PID;
}
exit if $pid;
setsid or die "Can't start a new session: $!";
#open STDERR, '>&STDOUT' or die "Can't dup stdout: $!";
}
sub run {
my $self = shift;
$self->{irc}->do_one_loop();
}
sub shutdown {
my $sig = shift;
print STDERR "Received SIG$sig, shutting down...\n";
$running = 0;
}
sub socket_has_data {
my $self = shift;
$self->{socket}->recv(my $data, 1024);
if ($CFG::Nsa{'usenotices'}) {
$self->{conn}->notice($CFG::Nsa{'channel'}, $data);
} else {
$self->{conn}->privmsg($CFG::Nsa{'channel'}, $data);
}
}
sub irc_on_connect {
my $self = shift;
print STDERR "Joining channel '$CFG::Nsa{'channel'}'...\n";
$self->join($CFG::Nsa{'channel'});
}
sub irc_on_msg {
my ($self, $event) = @_;
my $data = join(' ', $event->args);
#my $nick = quotemeta($nicks[$nick]);
my $to = $event->to;
#my $channel = &toToChannel($self, @$to);
#my $cmdChar = $commandChar{default}; # FIXME: should look up for CURRENT channel first!
#if ( exists $commandChar{$channel} ) { $cmdChar = $commandChar{$channel}; }
my $msg = parse_msg($event);
if (defined($msg)) {
#$self->privmsg($event->nick, "alright, sending this message to nagios, hope it figures it out: $msg");
} else {
$self->privmsg($event->nick, "can't parse $data, you want 'ack host service comment'\n");
}
}
sub irc_on_public {
my ($self, $event) = @_;
my $data = join(' ', $event->args);
my $to = $event->to;
if ($data =~ s/([^:]*):\s+//) {
if ($1 eq $CFG::Nsa{'nickname'}) {
my $msg = parse_msg($event);
if (defined($msg)) {
#$self->privmsg($event->to, "alright, sending this message to nagios, hope it figures it out: $msg");
} else {
$self->privmsg($event->to, "can't parse $data, you want 'ack host service comment'\n");
}
} else {
#print STDERR "ignoring message $data, not for me (me being $1)\n";
}
} else {
#print STDERR "ignoring message $data\n";
}
}
sub parse_msg {
my $event= shift;
my $data = join(' ', $event->args);
my $msg;
if ($data =~ m/([^:]*:)?\s*ack(?:knowledge)?\s+([a-zA-Z0-9\-\.]+)(?:\s+([-\w\.]+)(?:\s+([\w\s]+))?)?/) {
#print STDERR "writing to nagios scoket ". $CFG::Nsa{'commandfile'} . "\n";
open(my $cmdfile, ">", $CFG::Nsa{'commandfile'}) || die "Can't open Nagios commandfile: $CFG::Nsa{'commandfile'}!\n";
my $host = $2;
my ($service, $comment) = (undef, "no comment (from irc)");
if ($4) {
$service = $3;
$comment = $4;
} elsif ($3) {
$service = $3;
}
my $user = $event->nick;
$msg = '[' . time() . '] ';
if (defined($service)) {
$msg .= "ACKNOWLEDGE_SVC_PROBLEM;$host;$service;1;1;1;$user;$comment\n";
} else {
$msg .= "ACKNOWLEDGE_HOST_PROBLEM;$host;1;1;1;$user;$comment\n";
}
print {$cmdfile} $msg;
close($cmdfile);
}
return $msg;
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
my $bot = &new;
if (-e $CFG::Nsa{'socket'}) {
die "Socket '$CFG::Nsa{'socket'}' exists!\n";
}
$bot->{socket} = IO::Socket::UNIX->new (
Local => $CFG::Nsa{'socket'},
Type => SOCK_DGRAM,
Listen => 5
) || die "Can't create socket '$CFG::Nsa{'socket'}'!\n";
$SIG{INT} = $SIG{TERM} = \&shutdown;
$bot->daemonize();
$bot->{irc} = new Net::IRC;
$bot->{conn} = $bot->{irc}->newconn (
Server => $CFG::Nsa{'server'},
Port => $CFG::Nsa{'port'},
Nick => $CFG::Nsa{'nickname'},
Username => $CFG::Nsa{'nickname'},
Password => $CFG::Nsa{'password'},
Ircname => $CFG::Nsa{'realname'} . " (NSA $VERSION)",
) || die "Can't connect to server '$CFG::Nsa{'server'}'!\n";
$bot->{conn}->add_global_handler(376, \&irc_on_connect);
$bot->{conn}->add_global_handler('nomotd', \&irc_on_connect);
$bot->{conn}->add_global_handler('msg', \&irc_on_msg);
$bot->{conn}->add_global_handler('public', \&irc_on_public);
#$bot->{conn}->add_global_handler('notice', \&irc_on_msg);
$bot->{irc}->addfh($bot->{socket}, \&socket_has_data, 'r', $bot);
while ($running) {
$bot->run();
}
close($bot->{socket});
unlink($CFG::Nsa{'socket'});
exit(0);
1;
__END__
|
