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pbot/lib/PBot/Core/Handlers/BanList.pm

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# File: BanList.pm
#
# Purpose: Populates and maintains channel banlists by checking mode +b/+q
# when joining channels and by tracking modes +b/+q and -b/-q in channels.
# SPDX-FileCopyrightText: 2010-2023 Pragmatic Software <pragma78@gmail.com>
# SPDX-License-Identifier: MIT
package PBot::Core::Handlers::BanList;
use parent 'PBot::Core::Class';
use PBot::Imports;
use Time::HiRes qw(gettimeofday);
use Time::Duration;
sub initialize {
my ($self, %conf) = @_;
$self->{pbot}->{event_dispatcher}->register_handler('irc.endofnames', sub { $self->on_endofnames(@_) });
$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(@_) });
$self->{pbot}->{event_dispatcher}->register_handler('irc.endofbanlist', sub { $self->on_endofbanlist(@_) });
$self->{pbot}->{event_dispatcher}->register_handler('irc.endofquietlist', sub { $self->on_endofquietlist(@_) });
$self->{pbot}->{event_dispatcher}->register_handler('irc.modeflag', sub { $self->on_modeflag(@_) });
$self->{mute_char} = $self->{pbot}->{registry}->get_value('banlist', 'mute_mode_char');
}
# typically, immediately after joining a channel...
sub on_endofnames {
my ($self, $event_type, $event) = @_;
my $channel = lc $event->{args}[1];
$self->{pbot}->{logger}->log("Retrieving banlist for $channel.\n");
# banlist cache temporarily holds the banlist/quietlist entries until
# irc.endofbanlist and irc.endofquietlist are received.
delete $self->{banlist_cache};
my $mute_char = $self->{mute_char};
if ($mute_char eq 'b') {
$event->{conn}->sl("mode $channel +b");
} else {
$event->{conn}->sl("mode $channel +b$mute_char");
}
return 1;
}
sub on_banlist_entry {
my ($self, $event_type, $event) = @_;
my $channel = lc $event->{args}[1];
my $target = lc $event->{args}[2];
my $source = lc $event->{args}[3];
my $timestamp = $event->{args}[4];
my $ago = concise ago(gettimeofday - $timestamp);
$self->{pbot}->{logger}->log("Ban List: [banlist entry] $channel: $target banned by $source $ago.\n");
$self->{banlist_cache}->{$channel}->{'+b'}->{$target} = [$source, $timestamp];
return 1;
}
sub on_quietlist_entry {
my ($self, $event_type, $event) = @_;
my $channel = lc $event->{args}[1];
my $target = lc $event->{args}[3];
my $source = lc $event->{args}[4];
my $timestamp = $event->{args}[5];
my $ago = concise ago(gettimeofday - $timestamp);
$self->{pbot}->{logger}->log("Ban List: [quietlist entry] $channel: $target quieted by $source $ago.\n");
my $mute_char = $self->{mute_char};
$self->{banlist_cache}->{$channel}->{"+$mute_char"}->{$target} = [$source, $timestamp];
return 1;
}
sub on_endofbanlist {
my ($self, $event_type, $event) = @_;
my $channel = lc $event->{args}[1];
# first check for saved bans no longer in channel
foreach my $mask ($self->{pbot}->{banlist}->{banlist}->get_keys($channel)) {
if (not exists $self->{banlist_cache}->{$channel}->{'+b'}->{$mask}) {
$self->{pbot}->{logger}->log("BanList: Saved ban +b $mask no longer exists in $channel.\n");
# TODO option to restore ban
$self->{pbot}->{banlist}->{banlist}->remove($channel, $mask, undef, 1);
$self->{pbot}->{event_queue}->dequeue_event("unban $channel $mask");
}
}
my $save = 0;
# add channel bans to saved bans
foreach my $mask (keys %{$self->{banlist_cache}->{$channel}->{'+b'}}) {
my $owner = $self->{banlist_cache}->{$channel}->{'+b'}->{$mask}->[0];
my $timestamp = $self->{banlist_cache}->{$channel}->{'+b'}->{$mask}->[1];
my $add = 0;
my $data = $self->{pbot}->{banlist}->{banlist}->get_data($channel, $mask);
# only update owner/timestamp if there's no existing entry or if the owner is a full hostmask.
# this prevents updating the owner/timestamp to a server value, losing information about who
# originally set the ban
if (!defined $data || $owner =~ /^.+!.+@.+$/) {
$data->{owner} = $owner;
$data->{timestamp} = $timestamp;
$add = 1;
}
# make some special-case bans temporary
if (not defined $data->{timeout} and $self->{pbot}->{chanops}->can_gain_ops($channel)) {
if ($mask =~ m/^\*!\*@/ or $mask =~ m/^\*!.*\@gateway\/web/i) {
my $timeout = 60 * 60 * 24 * 7;
# permanent bans for cloaks that aren't gateway
$timeout = 0 if $mask =~ m/\// and $mask !~ m/\@gateway/;
if ($timeout) {
$self->{pbot}->{logger}->log("Temp ban for $mask in $channel.\n");
$data->{timeout} = gettimeofday + $timeout;
$add = 1;
$self->{pbot}->{banlist}->enqueue_unban($channel, 'b', $mask, $timeout);
}
}
}
if ($add) {
$self->{pbot}->{banlist}->{banlist}->add($channel, $mask, $data, 1);
$save = 1;
}
}
$self->{pbot}->{banlist}->{banlist}->save if $save;
delete $self->{banlist_cache}->{$channel}->{'+b'};
return 1;
}
sub on_endofquietlist {
my ($self, $event_type, $event) = @_;
my $channel = lc $event->{args}[1];
my $mute_char = $self->{mute_char};
# first check for saved quiets no longer in channel
foreach my $mask ($self->{pbot}->{banlist}->{quietlist}->get_keys($channel)) {
if (not exists $self->{banlist_cache}->{$channel}->{"+$mute_char"}->{$mask}) {
$self->{pbot}->{logger}->log("BanList: Saved quiet +q $mask no longer exists in $channel.\n");
# TODO option to restore quiet
$self->{pbot}->{banlist}->{quietlist}->remove($channel, $mask, undef, 1);
$self->{pbot}->{event_queue}->dequeue_event("unmute $channel $mask");
}
}
my $save = 0;
# add channel bans to saved bans
foreach my $mask (keys %{$self->{banlist_cache}->{$channel}->{"+$mute_char"}}) {
my $owner = $self->{banlist_cache}->{$channel}->{"+$mute_char"}->{$mask}->[0];
my $timestamp = $self->{banlist_cache}->{$channel}->{"+$mute_char"}->{$mask}->[1];
my $data = $self->{pbot}->{banlist}->{quietlist}->get_data($channel, $mask);
# only update owner/timestamp if there's no existing entry or if the owner is a full hostmask.
# this prevents updating the owner/timestamp to a server value, losing information about who
# originally set the quiet
if (!defined $data || $owner =~ /^.+!.+@.+$/) {
$data->{owner} = $owner;
$data->{timestamp} = $timestamp;
$self->{pbot}->{banlist}->{quietlist}->add($channel, $mask, $data, 1);
$save = 1;
}
}
$self->{pbot}->{banlist}->{quietlist}->save if $save;
delete $self->{banlist_cache}->{$channel}->{"+$mute_char"};
return 1;
}
sub on_modeflag {
my ($self, $event_type, $event) = @_;
my ($source, $channel, $mode, $mask) = (
$event->{source},
$event->{channel},
$event->{mode},
$event->{target},
);
my ($nick) = $source =~ /(^[^!]+)/;
$channel = defined $channel ? lc $channel : '';
$mask = defined $mask ? lc $mask : '';
my $mute_char = $self->{mute_char};
if ($mode eq "+b" or $mode eq "+$mute_char") {
$self->{pbot}->{logger}->log("Ban List: $mask " . ($mode eq '+b' ? 'banned' : 'muted') . " by $source in $channel.\n");
if ($mode eq "+b") {
my $data = $self->{pbot}->{banlist}->{banlist}->get_data($channel, $mask);
# only update owner/timestamp if there's no existing entry or if the source is a full hostmask.
# this prevents updating the owner/timestamp to a server value, losing information about who
# originally set it
if (!defined $data || $source =~ /^.+!.+@.+$/) {
$data->{owner} = $source;
$data->{timestamp} = scalar gettimeofday;
$self->{pbot}->{banlist}->{banlist}->add($channel, $mask, $data);
}
} elsif ($mode eq "+$mute_char") {
my $data = $self->{pbot}->{banlist}->{quietlist}->get_data($channel, $mask);
# only update owner/timestamp if there's no existing entry or if the source is a full hostmask.
# this prevents updating the owner/timestamp to a server value, losing information about who
# originally set it
if (!defined $data || $source =~ /^.+!.+@.+$/) {
$data->{owner} = $source;
$data->{timestamp} = scalar gettimeofday;
$self->{pbot}->{banlist}->{quietlist}->add($channel, $mask, $data);
}
}
$self->{pbot}->{antiflood}->devalidate_accounts($mask, $channel);
} elsif ($mode eq "-b" or $mode eq "-$mute_char") {
$self->{pbot}->{logger}->log("Ban List: $mask " . ($mode eq '-b' ? 'unbanned' : 'unmuted') . " by $source in $channel.\n");
if ($mode eq "-b") {
$self->{pbot}->{banlist}->{banlist}->remove($channel, $mask);
$self->{pbot}->{event_queue}->dequeue_event("unban $channel $mask");
# freenode strips channel forwards from unban result if no ban exists with a channel forward
my $join_flood_channel = $self->{pbot}->{registry}->get_value('antiflood', 'join_flood_channel') // '#stop-join-flood';
$self->{pbot}->{banlist}->{banlist}->remove($channel, "$mask\$$join_flood_channel");
$self->{pbot}->{event_queue}->dequeue_event(lc "unban $channel $mask\$$join_flood_channel");
} elsif ($mode eq "-$mute_char") {
$self->{pbot}->{banlist}->{quietlist}->remove($channel, $mask);
$self->{pbot}->{event_queue}->dequeue_event("unmute $channel $mask");
}
}
return if not $self->{pbot}->{chanops}->can_gain_ops($channel);
if ($mode eq "+b") {
if ($nick eq "ChanServ" or $mask =~ m/##fix_your_connection$/i) {
if ($self->{pbot}->{banlist}->{banlist}->exists($channel, $mask)) {
$self->{pbot}->{banlist}->{banlist}->set($channel, $mask, 'timeout', gettimeofday + $self->{pbot}->{registry}->get_value('banlist', 'chanserv_ban_timeout'));
$self->{pbot}->{event_queue}->update_interval("unban $channel $mask", $self->{pbot}->{registry}->get_value('banlist', 'chanserv_ban_timeout'));
} else {
my $data = {
reason => 'Temp ban for banned-by-ChanServ or mask is *!*@*##fix_your_connection',
owner => $self->{pbot}->{registry}->get_value('irc', 'botnick'),
timeout => gettimeofday + $self->{pbot}->{registry}->get_value('banlist', 'chanserv_ban_timeout'),
timestamp => gettimeofday,
};
$self->{pbot}->{banlist}->{banlist}->add($channel, $mask, $data);
$self->{pbot}->{banlist}->enqueue_unban($channel, 'b', $mask, $self->{pbot}->{registry}->get_value('banlist', 'chanserv_ban_timeout'));
}
} elsif ($mask =~ m/^\*!\*@/ or $mask =~ m/^\*!.*\@gateway\/web/i) {
my $timeout = 60 * 60 * 24 * 7;
if ($mask =~ m/\// and $mask !~ m/\@gateway/) {
$timeout = 0; # permanent bans for cloaks that aren't gateway
}
if ($timeout) {
if (not $self->{pbot}->{banlist}->{banlist}->exists($channel, $mask)) {
$self->{pbot}->{logger}->log("Temp ban for $mask in $channel.\n");
my $data = {
reason => 'Temp ban for *!*@host',
timeout => gettimeofday + $timeout,
owner => $self->{pbot}->{registry}->get_value('irc', 'botnick'),
timestamp => gettimeofday,
};
$self->{pbot}->{banlist}->{banlist}->add($channel, $mask, $data);
$self->{pbot}->{banlist}->enqueue_unban($channel, 'b', $mask, $timeout);
}
}
}
} elsif ($mode eq "+$mute_char") {
if (lc $nick ne lc $self->{pbot}->{registry}->get_value('irc', 'botnick')) {
$self->{pbot}->{logger}->log("WEIRD MUTE THING $nick...\n");
if ($self->{pbot}->{banlist}->{quietlist}->exists($channel, $mask)) {
$self->{pbot}->{banlist}->{quietlist}->set($channel, $mask, 'timeout', gettimeofday + $self->{pbot}->{registry}->get_value('banlist', 'chanserv_ban_timeout'));
$self->{pbot}->{event_queue}->update_interval("unmute $channel $mask", $self->{pbot}->{registry}->get_value('banlist', 'chanserv_ban_timeout'));
} else {
my $data = {
reason => 'Temp mute',
owner => $self->{pbot}->{registry}->get_value('irc', 'botnick'),
timeout => gettimeofday + $self->{pbot}->{registry}->get_value('banlist', 'mute_timeout'),
timestamp => gettimeofday,
};
$self->{pbot}->{banlist}->{quietlist}->add($channel, $mask, $data);
$self->{pbot}->{banlist}->enqueue_unban($channel, $self->{mute_char}, $mask, $self->{pbot}->{registry}->get_value('banlist', 'mute_timeout'));
}
}
}
return 1;
}
1;
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