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472 lines
16 KiB
Perl
472 lines
16 KiB
Perl
# File: BanList.pm
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#
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# Purpose: Implements functions related to maintaining and tracking channel
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# bans/mutes. Maintains ban/mute queues and timeouts.
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# SPDX-FileCopyrightText: 2015-2023 Pragmatic Software <pragma78@gmail.com>
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# SPDX-License-Identifier: MIT
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package PBot::Core::BanList;
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use parent 'PBot::Core::Class';
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use PBot::Imports;
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use PBot::Core::MessageHistory::Constants ':all';
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use Time::HiRes qw/gettimeofday/;
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use Time::Duration;
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use POSIX qw/strftime/;
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sub initialize($self, %conf) {
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$self->{pbot}->{registry}->add_default('text', 'banlist', 'chanserv_ban_timeout', '604800');
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$self->{pbot}->{registry}->add_default('text', 'banlist', 'mute_timeout', '604800');
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$self->{pbot}->{registry}->add_default('text', 'banlist', 'debug', '0');
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$self->{pbot}->{registry}->add_default('text', 'banlist', 'mute_mode_char', 'q');
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my $data_dir = $self->{pbot}->{registry}->get_value('general', 'data_dir');
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$self->{'ban-exemptions'} = PBot::Core::Storage::DualIndexHashObject->new(
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pbot => $self->{pbot},
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name => 'Ban exemptions',
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filename => "$data_dir/ban-exemptions",
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);
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$self->{banlist} = PBot::Core::Storage::DualIndexHashObject->new(
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pbot => $self->{pbot},
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name => 'Ban List',
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filename => "$data_dir/banlist",
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save_queue_timeout => 15,
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);
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$self->{quietlist} = PBot::Core::Storage::DualIndexHashObject->new(
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pbot => $self->{pbot},
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name => 'Quiet List',
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filename => "$data_dir/quietlist",
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save_queue_timeout => 15,
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);
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$self->{'ban-exemptions'}->load;
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$self->{banlist}->load;
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$self->{quietlist}->load;
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$self->enqueue_timeouts($self->{banlist}, 'b');
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$self->enqueue_timeouts($self->{quietlist}, $self->{pbot}->{registry}->get_value('banlist', 'mute_mode_char'));
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$self->{ban_queue} = {};
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$self->{unban_queue} = {};
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$self->{pbot}->{event_queue}->enqueue(sub { $self->flush_unban_queue }, 30, 'Flush unban queue');
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}
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sub checkban($self, $channel, $mode, $mask) {
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$mask = $self->nick_to_banmask($mask);
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my $data;
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if ($mode eq 'b') {
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$data = $self->{banlist}->get_data($channel, $mask);
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} elsif ($mode eq $self->{pbot}->{registry}->get_value('banlist', 'mute_mode_char')) {
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$data = $self->{quietlist}->get_data($channel, $mask);
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}
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if (not defined $data) {
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return "$mask is not " . ($mode eq 'b' ? 'banned' : 'muted') . ".";
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}
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my $result = "$mask " . ($mode eq 'b' ? 'banned' : 'quieted') . " in $channel ";
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if (defined $data->{timestamp}) {
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my $date = strftime "%a %b %e %H:%M:%S %Y %Z", localtime $data->{timestamp};
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my $ago = concise ago (time - $data->{timestamp});
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$result .= "on $date ($ago) ";
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}
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$result .= "by $data->{owner} " if defined $data->{owner};
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$result .= "because $data->{reason} " if defined $data->{reason};
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if (exists $data->{timeout} and $data->{timeout} > 0) {
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my $duration = concise duration($data->{timeout} - gettimeofday);
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$result .= "($duration remaining)";
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}
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return $result;
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}
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sub is_ban_exempted($self, $channel, $hostmask) {
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return 1 if $self->{'ban-exemptions'}->exists(lc $channel, lc $hostmask);
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return 0;
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}
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sub is_banned($self, $channel, $nick, $user, $host) {
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my $message_account = $self->{pbot}->{messagehistory}->{database}->get_message_account($nick, $user, $host);
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my @nickserv_accounts = $self->{pbot}->{messagehistory}->{database}->get_nickserv_accounts($message_account);
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push @nickserv_accounts, undef;
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my $banned = undef;
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foreach my $nickserv_account (@nickserv_accounts) {
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my $baninfos = $self->get_baninfo($channel, "$nick!$user\@$host", $nickserv_account);
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if (defined $baninfos) {
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foreach my $baninfo (@$baninfos) {
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my $u = $self->{pbot}->{users}->loggedin($baninfo->{channel}, "$nick!$user\@$host");
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my $whitelisted = $self->{pbot}->{capabilities}->userhas($u, 'is-whitelisted');
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if ($self->is_ban_exempted($baninfo->{channel}, $baninfo->{mask}) || $whitelisted) {
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$self->{pbot}->{logger}->log("[BanList] is_banned: $nick!$user\@$host banned as $baninfo->{mask} in $baninfo->{channel}, but allowed through whitelist\n");
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} else {
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if ($channel eq lc $baninfo->{channel}) {
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my $mode = $baninfo->{type} eq 'b' ? "banned" : "quieted";
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$self->{pbot}->{logger}->log("[BanList] is_banned: $nick!$user\@$host $mode as $baninfo->{mask} in $baninfo->{channel} by $baninfo->{owner}\n");
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$banned = $baninfo;
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last;
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}
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}
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}
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}
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}
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return $banned;
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}
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sub has_ban_timeout($self, $channel, $mask, $mode = 'b') {
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my $list = $mode eq 'b' ? $self->{banlist} : $self->{quietlist};
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my $data = $list->get_data($channel, $mask);
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if (defined $data && $data->{timeout} > 0) {
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return 1;
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} else {
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return 0;
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}
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}
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sub ban_user_timed($self, $channel, $mode, $mask, $length, $owner, $reason, $immediately = undef) {
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$channel = lc $channel;
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$mask = lc $mask;
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$mask = $self->nick_to_banmask($mask);
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$self->ban_user($channel, $mode, $mask, $immediately);
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my $data = {
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timeout => $length > 0 ? gettimeofday + $length : -1,
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owner => $owner,
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reason => $reason,
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timestamp => time,
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};
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if ($mode eq 'b') {
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$self->{banlist}->remove($channel, $mask, 'timeout');
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$self->{banlist}->add($channel, $mask, $data);
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} elsif ($mode eq $self->{pbot}->{registry}->get_value('banlist', 'mute_mode_char')) {
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$self->{quietlist}->remove($channel, $mask, 'timeout');
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$self->{quietlist}->add($channel, $mask, $data);
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}
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my $method = $mode eq 'b' ? 'unban' : 'unmute';
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$self->{pbot}->{event_queue}->dequeue_event("$method $channel $mask");
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if ($length > 0) {
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$self->enqueue_unban($channel, $mode, $mask, $length);
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}
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}
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sub ban_user($self, $channel, $mode, $mask, $immediately = undef) {
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$self->{pbot}->{logger}->log("Banning $channel +$mode $mask\n");
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$self->add_to_ban_queue($channel, $mode, $mask);
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if (not defined $immediately or $immediately != 0) {
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$self->flush_ban_queue;
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}
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}
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sub unban_user($self, $channel, $mode, $mask, $immediately = undef) {
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$mask = lc $mask;
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$channel = lc $channel;
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$self->{pbot}->{logger}->log("Unbanning $channel -$mode $mask\n");
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$self->unmode_user($channel, $mode, $mask, $immediately);
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}
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sub unmode_user($self, $channel, $mode, $mask, $immediately = undef) {
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$mask = lc $mask;
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$channel = lc $channel;
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$self->{pbot}->{logger}->log("Removing mode $mode from $mask in $channel\n");
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my $bans = $self->get_bans($channel, $mask);
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my %unbanned;
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if (not defined $bans) {
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push @$bans, { mask => $mask, type => $mode };
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}
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foreach my $ban (@$bans) {
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next if $ban->{type} ne $mode;
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next if exists $unbanned{$ban->{mask}};
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$unbanned{$ban->{mask}} = 1;
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$self->add_to_unban_queue($channel, $mode, $ban->{mask});
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}
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$self->flush_unban_queue if $immediately;
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}
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sub get_bans($self, $channel, $mask) {
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my $masks;
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my ($message_account, $hostmask);
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if ($mask !~ m/[!@]/) {
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($message_account, $hostmask) = $self->{pbot}->{messagehistory}->{database}->find_message_account_by_nick($mask);
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$hostmask = $mask if not defined $message_account;
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} else {
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$message_account = $self->{pbot}->{messagehistory}->{database}->get_message_account_id($mask);
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$hostmask = $mask;
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}
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if (defined $message_account) {
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my $nickserv = $self->{pbot}->{messagehistory}->{database}->get_current_nickserv_account($message_account);
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$masks = $self->get_baninfo($channel, $hostmask, $nickserv);
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}
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my %akas = $self->{pbot}->{messagehistory}->{database}->get_also_known_as($hostmask);
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foreach my $aka (keys %akas) {
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next if $akas{$aka}->{type} == LINK_WEAK;
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next if $akas{$aka}->{nickchange} == 1;
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my $nickserv = $self->{pbot}->{messagehistory}->{database}->get_current_nickserv_account($akas{$aka}->{id});
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my $b = $self->get_baninfo($channel, $aka, $nickserv);
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if (defined $b) {
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push @$masks, @$b;
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}
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}
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return $masks;
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}
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sub get_baninfo($self, $channel, $mask, $nickserv) {
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my ($bans, $ban_nickserv);
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$nickserv = undef if not length $nickserv;
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$nickserv = lc $nickserv if defined $nickserv;
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if ($self->{pbot}->{registry}->get_value('banlist', 'debug')) {
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my $ns = defined $nickserv ? $nickserv : "[undefined]";
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$self->{pbot}->{logger}->log("[get-baninfo] Getting baninfo for $mask in $channel using nickserv $ns\n");
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}
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my ($nick, $user, $host) = $mask =~ m/([^!]+)!([^@]+)@(.*)/;
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my @lists = (
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[ 'b', $self->{banlist} ],
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[ $self->{pbot}->{registry}->get_value('banlist', 'mute_mode_char'), $self->{quietlist} ],
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);
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my $is_irccloud = $host =~ m{\.irccloud.com$};
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my $irccloud_uid;
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if ($is_irccloud) {
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($irccloud_uid) = $user =~ /id(\d+)$/;
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}
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foreach my $entry (@lists) {
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my ($mode, $list) = @$entry;
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foreach my $banmask ($list->get_keys($channel)) {
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if ($banmask =~ m/^\$a:(.*)/) {
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$ban_nickserv = lc $1;
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} else {
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$ban_nickserv = '';
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}
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my $banmask_regex = quotemeta $banmask;
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$banmask_regex =~ s/\\\*/.*?/g;
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$banmask_regex =~ s/\\\?/./g;
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my $banned;
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$banned = 1 if defined $nickserv and $nickserv eq $ban_nickserv;
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$banned = 1 if $mask =~ m/^$banmask_regex$/i;
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# irccloud hosts are disambiguated by the user field which can be uid{N}+ or sid{N}+
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# where {N}+ are 1 or more integer digits
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if ($is_irccloud && $banmask =~ m{\@.*\.irccloud.com$}) {
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my ($bannick, $banuser, $banhost) = $banmask =~ m/([^!]+)!([^@]+)@(.*)/;
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my ($banuid) = $banuser =~ /id(\d+)$/;
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$banned = $1 if $irccloud_uid == $banuid;
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}
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if ($banned) {
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my $data = $list->get_data($channel, $banmask);
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my $baninfo = {
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mask => $banmask,
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channel => $channel,
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owner => $data->{owner},
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when => $data->{timestamp},
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type => $mode,
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reason => $data->{reason},
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timeout => $data->{timeout},
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};
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push @$bans, $baninfo;
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}
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}
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}
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return $bans;
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}
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sub nick_to_banmask($self, $mask) {
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if ($mask !~ m/[!@\$]/) {
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my ($message_account, $hostmask) = $self->{pbot}->{messagehistory}->{database}->find_message_account_by_nick($mask);
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if (defined $hostmask) {
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my $nickserv = $self->{pbot}->{messagehistory}->{database}->get_current_nickserv_account($message_account);
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if (defined $nickserv && length $nickserv) { $mask = '$a:' . $nickserv; }
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else {
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my ($nick, $user, $host) = $hostmask =~ m/([^!]+)!([^@]+)@(.*)/;
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$mask = "*!$user\@" . $self->{pbot}->{antiflood}->address_to_mask($host);
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}
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} else {
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$mask .= '!*@*';
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}
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}
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# $a:account, etc, don't need wildcards appended
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if ($mask =~ /^\$/) {
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return $mask;
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}
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# ensure $mask is a complete hostmask by appending missing bits with wildcards
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if ($mask !~ /!/) {
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$mask .= '!*@*';
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} elsif ($mask !~ /@/) {
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$mask =~ s/\*?$/*@*/;
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} else {
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# TODO find out if/where this weird case happens and why...
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$mask =~ s/\@$/@*/;
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}
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return $mask;
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}
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sub add_to_ban_queue($self, $channel, $mode, $mask) {
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if (not grep { $_ eq $mask } @{$self->{ban_queue}->{$channel}->{$mode}}) {
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push @{$self->{ban_queue}->{$channel}->{$mode}}, $mask;
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$self->{pbot}->{logger}->log("Added +$mode $mask for $channel to ban queue.\n");
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}
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}
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sub add_to_unban_queue($self, $channel, $mode, $mask) {
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if (not grep { $_ eq $mask } @{$self->{unban_queue}->{$channel}->{$mode}}) {
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push @{$self->{unban_queue}->{$channel}->{$mode}}, $mask;
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$self->{pbot}->{logger}->log("Added -$mode $mask for $channel to unban queue.\n");
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}
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}
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sub flush_ban_queue($self) {
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my $MAX_COMMANDS = 4;
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my $commands = 0;
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foreach my $channel (keys %{$self->{ban_queue}}) {
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my $done = 0;
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while (not $done) {
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my ($list, $count, $modes);
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$list = '';
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$modes = '+';
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$count = 0;
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foreach my $mode (keys %{$self->{ban_queue}->{$channel}}) {
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while (@{$self->{ban_queue}->{$channel}->{$mode}}) {
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my $target = pop @{$self->{ban_queue}->{$channel}->{$mode}};
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$list .= " $target";
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$modes .= $mode;
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last if ++$count >= $self->{pbot}->{isupport}->{MODES} // 1;
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}
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if (not @{$self->{ban_queue}->{$channel}->{$mode}}) {
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delete $self->{ban_queue}->{$channel}->{$mode};
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}
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last if $count >= $self->{pbot}->{isupport}->{MODES} // 1;
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}
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if (not keys %{$self->{ban_queue}->{$channel}}) {
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delete $self->{ban_queue}->{$channel};
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$done = 1;
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}
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if ($count) {
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$self->{pbot}->{chanops}->add_op_command($channel, "mode $channel $modes $list");
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$self->{pbot}->{chanops}->gain_ops($channel);
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return if ++$commands >= $MAX_COMMANDS;
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}
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}
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}
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}
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sub flush_unban_queue($self) {
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my $MAX_COMMANDS = 4;
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my $commands = 0;
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foreach my $channel (keys %{$self->{unban_queue}}) {
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my $done = 0;
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while (not $done) {
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my ($list, $count, $modes);
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$list = '';
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$modes = '-';
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$count = 0;
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foreach my $mode (keys %{$self->{unban_queue}->{$channel}}) {
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while (@{$self->{unban_queue}->{$channel}->{$mode}}) {
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my $target = pop @{$self->{unban_queue}->{$channel}->{$mode}};
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$list .= " $target";
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$modes .= $mode;
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last if ++$count >= $self->{pbot}->{isupport}->{MODES} // 1;
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}
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if (not @{$self->{unban_queue}->{$channel}->{$mode}}) {
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delete $self->{unban_queue}->{$channel}->{$mode};
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}
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last if $count >= $self->{pbot}->{isupport}->{MODES} // 1;
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}
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if (not keys %{$self->{unban_queue}->{$channel}}) {
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delete $self->{unban_queue}->{$channel};
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$done = 1;
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}
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if ($count) {
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$self->{pbot}->{chanops}->add_op_command($channel, "mode $channel $modes $list");
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$self->{pbot}->{chanops}->gain_ops($channel);
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return if ++$commands >= $MAX_COMMANDS;
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}
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}
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}
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}
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sub enqueue_unban($self, $channel, $mode, $hostmask, $interval) {
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my $method = $mode eq 'b' ? 'unban' : 'unmute';
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$self->{pbot}->{event_queue}->enqueue_event(
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sub {
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$self->{pbot}->{event_queue}->update_interval("$method $channel $hostmask", 60 * 5, 1); # try again in 5 minutes
|
|
return if not $self->{pbot}->{joined_channels};
|
|
$self->unban_user($channel, $mode, $hostmask);
|
|
}, $interval, "$method $channel $hostmask", 1
|
|
);
|
|
}
|
|
|
|
sub enqueue_timeouts($self, $list, $mode) {
|
|
my $now = time;
|
|
|
|
foreach my $channel ($list->get_keys) {
|
|
foreach my $mask ($list->get_keys($channel)) {
|
|
my $timeout = $list->get_data($channel, $mask, 'timeout');
|
|
next if defined $timeout and $timeout <= 0;
|
|
next if not defined $timeout;
|
|
my $interval = $timeout - $now;
|
|
$interval = 10 if $interval < 10;
|
|
$self->enqueue_unban($channel, $mode, $mask, $interval);
|
|
}
|
|
}
|
|
}
|
|
|
|
1;
|