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pbot/PBot/BanTracker.pm
2018-02-28 11:13:56 -08:00

215 lines
7.2 KiB
Perl

# File: BanTracker.pm
# Author: pragma_
#
# Purpose: Populates and maintains channel banlists by checking mode +b on
# joining channels and by tracking modes +b and -b in channels.
#
# Does NOT do banning or unbanning.
# 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::BanTracker;
use warnings;
use strict;
use Time::HiRes qw/gettimeofday/;
use Time::Duration;
use Data::Dumper;
$Data::Dumper::Sortkeys = 1;
use Carp ();
sub new {
if(ref($_[1]) eq 'HASH') {
Carp::croak("Options to BanTracker should be key/value pairs, not hash reference");
}
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 BanTracker");
$self->{banlist} = {};
$self->{pbot}->{registry}->add_default('text', 'bantracker', 'chanserv_ban_timeout', '604800');
$self->{pbot}->{registry}->add_default('text', 'bantracker', 'mute_timeout', '604800');
$self->{pbot}->{registry}->add_default('text', 'bantracker', 'debug', '0');
$self->{pbot}->{commands}->register(sub { $self->dumpbans(@_) }, "dumpbans", 60);
$self->{pbot}->{event_dispatcher}->register_handler('irc.endofnames', sub { $self->get_banlist(@_) });
$self->{pbot}->{event_dispatcher}->register_handler('irc.banlist', sub { $self->on_banlist_entry(@_) });
$self->{pbot}->{event_dispatcher}->register_handler('irc.quietlist', sub { $self->on_quietlist_entry(@_) });
}
sub dumpbans {
my ($self, $from, $nick, $user, $host, $arguments) = @_;
my $bans = Dumper($self->{banlist});
return $bans;
}
sub get_banlist {
my ($self, $event_type, $event) = @_;
my $channel = lc $event->{event}->{args}[1];
return 0 if not $self->{pbot}->{chanops}->can_gain_ops($channel);
delete $self->{banlist}->{$channel};
$self->{pbot}->{logger}->log("Retrieving banlist for $channel.\n");
$event->{conn}->sl("mode $channel +bq");
return 0;
}
sub on_banlist_entry {
my ($self, $event_type, $event) = @_;
my $channel = lc $event->{event}->{args}[1];
my $target = lc $event->{event}->{args}[2];
my $source = lc $event->{event}->{args}[3];
my $timestamp = $event->{event}->{args}[4];
my $ago = ago(gettimeofday - $timestamp);
$self->{pbot}->{logger}->log("ban-tracker: [banlist entry] $channel: $target banned by $source $ago.\n");
$self->{banlist}->{$channel}->{'+b'}->{$target} = [ $source, $timestamp ];
if ($target =~ m/^\*!\*@/ or $target =~ m/^\*!.*\@gateway\/web/i) {
my $timeout = 60 * 60 * 24 * 7;
if ($target =~ m/\// and $target !~ m/\@gateway/) {
$timeout = 0; # permanent bans for cloaks that aren't gateway
}
if ($timeout && $self->{pbot}->{chanops}->can_gain_ops($channel)) {
if (not exists $self->{pbot}->{chanops}->{unban_timeout}->hash->{$channel}->{$target}) {
$self->{pbot}->{logger}->log("Temp ban for $target in $channel.\n");
$self->{pbot}->{chanops}->{unban_timeout}->hash->{$channel}->{$target}{timeout} = gettimeofday + $timeout;
$self->{pbot}->{chanops}->{unban_timeout}->save;
}
}
}
return 0;
}
sub on_quietlist_entry {
my ($self, $event_type, $event) = @_;
my $channel = lc $event->{event}->{args}[1];
my $target = lc $event->{event}->{args}[3];
my $source = lc $event->{event}->{args}[4];
my $timestamp = $event->{event}->{args}[5];
my $ago = ago(gettimeofday - $timestamp);
$self->{pbot}->{logger}->log("ban-tracker: [quietlist entry] $channel: $target quieted by $source $ago.\n");
$self->{banlist}->{$channel}->{'+q'}->{$target} = [ $source, $timestamp ];
return 0;
}
sub get_baninfo {
my ($self, $mask, $channel, $account) = @_;
my ($bans, $ban_account);
$account = undef if not length $account;
$account = lc $account if defined $account;
if ($self->{pbot}->{registry}->get_value('bantracker', 'debug')) {
$self->{pbot}->{logger}->log("[get-baninfo] Getting baninfo for $mask in $channel using account " . (defined $account ? $account : "[undefined]") . "\n");
}
my ($nick, $user, $host) = $mask =~ m/([^!]+)!([^@]+)@(.*)/;
foreach my $mode (keys %{ $self->{banlist}->{$channel} }) {
foreach my $banmask (keys %{ $self->{banlist}->{$channel}->{$mode} }) {
if($banmask =~ m/^\$a:(.*)/) {
$ban_account = lc $1;
} else {
$ban_account = "";
}
my $banmask_key = $banmask;
$banmask = quotemeta $banmask;
$banmask =~ s/\\\*/.*?/g;
$banmask =~ s/\\\?/./g;
my $banned;
$banned = 1 if defined $account and $account eq $ban_account;
$banned = 1 if $mask =~ m/^$banmask$/i;
if ($banmask_key =~ m{\@gateway/web/irccloud.com} and $host =~ m{^gateway/web/irccloud.com}) {
my ($bannick, $banuser, $banhost) = $banmask_key =~ m/([^!]+)!([^@]+)@(.*)/;
if (lc $user eq lc $banuser) {
$banned = 1;
}
}
if ($banned) {
if(not defined $bans) {
$bans = [];
}
my $baninfo = {};
$baninfo->{banmask} = $banmask_key;
$baninfo->{channel} = $channel;
$baninfo->{owner} = $self->{banlist}->{$channel}->{$mode}->{$banmask_key}->[0];
$baninfo->{when} = $self->{banlist}->{$channel}->{$mode}->{$banmask_key}->[1];
$baninfo->{type} = $mode;
#$self->{pbot}->{logger}->log("get-baninfo: dump: " . Dumper($baninfo) . "\n");
$self->{pbot}->{logger}->log("get-baninfo: $baninfo->{banmask} $baninfo->{type} in $baninfo->{channel} by $baninfo->{owner} on $baninfo->{when}\n");
push @$bans, $baninfo;
}
}
}
return $bans;
}
sub track_mode {
my $self = shift;
my ($source, $mode, $target, $channel) = @_;
$mode = lc $mode;
$target = lc $target;
$channel = lc $channel;
if($mode eq "+b" or $mode eq "+q") {
$self->{pbot}->{logger}->log("ban-tracker: $target " . ($mode eq '+b' ? 'banned' : 'quieted') . " by $source in $channel.\n");
$self->{banlist}->{$channel}->{$mode}->{$target} = [ $source, gettimeofday ];
$self->{pbot}->{antiflood}->devalidate_accounts($target, $channel);
}
elsif($mode eq "-b" or $mode eq "-q") {
$self->{pbot}->{logger}->log("ban-tracker: $target " . ($mode eq '-b' ? 'unbanned' : 'unquieted') . " by $source in $channel.\n");
delete $self->{banlist}->{$channel}->{$mode eq "-b" ? "+b" : "+q"}->{$target};
if($mode eq "-b") {
if($self->{pbot}->{chanops}->{unban_timeout}->find_index($channel, $target)) {
$self->{pbot}->{chanops}->{unban_timeout}->remove($channel, $target);
} elsif($self->{pbot}->{chanops}->{unban_timeout}->find_index($channel, "$target\$##stop_join_flood")) {
# freenode strips channel forwards from unban result if no ban exists with a channel forward
$self->{pbot}->{chanops}->{unban_timeout}->remove($channel, "$target\$##stop_join_flood");
}
}
elsif($mode eq "-q") {
if($self->{pbot}->{chanops}->{unmute_timeout}->find_index($channel, $target)) {
$self->{pbot}->{chanops}->{unmute_timeout}->remove($channel, $target);
}
}
} else {
$self->{pbot}->{logger}->log("BanTracker: Unknown mode '$mode'\n");
}
}
1;