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Add AntiNickSpam plugin

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Pragmatic Software 2017-12-30 17:27:48 -08:00
parent 7bacdf6291
commit c1d4a88faa
1 changed files with 105 additions and 0 deletions
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PBot/Plugins/AntiNickSpam.pm Normal file
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# File: AntiNickSpam.pm
# Author: pragma_
#
# Purpose: Temporarily mutes $~a in channel if too many nicks were
# mentioned within a time period; used to combat botnet spam
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
package PBot::Plugins::AntiNickSpam;
use warnings;
use strict;
use Carp ();
use Time::Duration qw/duration/;
use Time::HiRes qw/gettimeofday/;
sub new {
Carp::croak("Options to " . __FILE__ . " should be key/value pairs, not hash reference") if ref $_[1] eq 'HASH';
my ($class, %conf) = @_;
my $self = bless {}, $class;
$self->initialize(%conf);
return $self;
}
sub initialize {
my ($self, %conf) = @_;
$self->{pbot} = delete $conf{pbot} // Carp::croak("Missing pbot reference to " . __FILE__);
$self->{pbot}->{event_dispatcher}->register_handler('irc.public', sub { $self->on_public(@_) });
$self->{pbot}->{event_dispatcher}->register_handler('irc.caction', sub { $self->on_action(@_) });
$self->{nicks} = {};
}
sub unload {
my ($self) = @_;
}
sub on_action {
my ($self, $event_type, $event) = @_;
my ($nick, $user, $host, $msg) = ($event->{event}->nick, $event->{event}->user, $event->{event}->host, $event->{event}->args);
my $channel = $event->{event}->{to}[0];
return 0 if $event->{interpreted};
$self->check_flood($nick, $user, $host, $channel, $msg);
return 0;
}
sub on_public {
my ($self, $event_type, $event) = @_;
my ($nick, $user, $host, $msg) = ($event->{event}->nick, $event->{event}->user, $event->{event}->host, $event->{event}->args);
my $channel = $event->{event}->{to}[0];
return 0 if $event->{interpreted};
$self->check_flood($nick, $user, $host, $channel, $msg);
return 0;
}
sub check_flood {
my ($self, $nick, $user, $host, $channel, $msg) = @_;
return 0 if not $self->{pbot}->{chanops}->can_gain_ops($channel);
my @words = split /\s+/, $msg;
$channel = lc $channel;
my @nicks;
foreach my $word (@words) {
$word =~ s/[:;\+,\.!?\@\%\$]+$//g;
if ($self->{pbot}->{nicklist}->is_present($channel, $word) and not grep { $_ eq $word } @nicks) {
push @{$self->{nicks}->{$channel}}, [scalar gettimeofday, $word];
push @nicks, $word;
}
}
$self->clear_old_nicks($channel);
if (exists $self->{nicks}->{$channel} and @{$self->{nicks}->{$channel}} >= 10) {
$self->{pbot}->{logger}->log("Nick spam flood detected in $channel\n");
$self->{pbot}->{chanops}->mute_user_timed('$~a', $channel, 60 * 15);
}
}
sub clear_old_nicks {
my ($self, $channel) = @_;
my $now = gettimeofday;
return if not exists $self->{nicks}->{$channel};
my $i = 50;
while (--$i > 0) {
if (@{$self->{nicks}->{$channel}} and $self->{nicks}->{$channel}->[0]->[0] <= $now - 15) {
shift @{$self->{nicks}->{$channel}};
} else {
last;
}
}
delete $self->{nicks}->{$channel} if not @{$self->{nicks}->{$channel}};
}
1;