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ban-tracker: track whether ban is +q or +b; do not ban evaders of generic +b bans ending with !*@*

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anti-flood: improved logic of catching ban evaders
This commit is contained in:
Pragmatic Software 2011-12-15 06:18:10 +00:00
parent 49561130e5
commit d7dc16346c
3 changed files with 42 additions and 21 deletions
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44
PBot/AntiFlood.pm
View File

@ -144,7 +144,11 @@ sub get_flood_account {
if($mask =~ m/!\Q$user\E@\Q$host\E$/i) {
$self->{pbot}->logger->log("anti-flood: [get-account] $nick!$user\@$host linked to $mask\n");
$self->{message_history}->{"$nick!$user\@$host"} = $self->{message_history}->{$mask};
$self->check_nickserv_accounts($nick, $self->{message_history}->{$mask}->{nickserv_account}) if defined $self->{message_history}->{$mask}->{nickserv_account};
if(defined $self->{message_history}->{$mask}->{nickserv_account}) {
$self->check_nickserv_accounts($nick, $self->{message_history}->{$mask}->{nickserv_account});
}
return "$nick!$user\@$host";
}
}
@ -463,8 +467,7 @@ sub address_to_mask {
sub check_nickserv_accounts {
my ($self, $nick, $account) = @_;
my @banned_channels;
my @account_masks;
my ($account_mask, @bans);
foreach my $mask (keys %{ $self->{message_history} }) {
if(exists $self->{message_history}->{$mask}->{nickserv_account}) {
@ -480,13 +483,11 @@ sub check_nickserv_accounts {
$self->{pbot}->logger->log("anti-flood: [check-bans] $mask evaded $baninfo->{banmask} in $baninfo->{channel}, but allowed through whitelist\n");
next;
} else {
$self->{pbot}->logger->log("anti-flood: [check-bans] $mask evaded $baninfo->{banmask} banned in $baninfo->{channel} by $baninfo->{owner}\n");
push @banned_channels, $baninfo->{channel};
$self->{pbot}->conn->privmsg($nick, "You have been banned in $baninfo->{channel} for attempting to evade a ban on $baninfo->{banmask} set by $baninfo->{owner}");
push @bans, $baninfo;
}
}
}
}
}
else {
# no nickserv account set yet
if($mask =~ m/^\Q$nick\E!/i) {
@ -494,19 +495,32 @@ sub check_nickserv_accounts {
$self->{pbot}->logger->log("anti-flood: $mask: setting nickserv account to [$account]\n");
$self->message_history->{$mask}->{nickserv_account} = $account;
push @account_masks, $mask;
$account_mask = $mask;
my $baninfo = $self->{pbot}->bantracker->get_baninfo($mask);
if(defined $baninfo) {
if($self->ban_whitelisted($baninfo->{channel}, $baninfo->{banmask})) {
$self->{pbot}->logger->log("anti-flood: [check-bans] $mask evaded $baninfo->{banmask} in $baninfo->{channel}, but allowed through whitelist\n");
next;
} else {
push @bans, $baninfo;
}
}
}
}
}
foreach my $banned_channel (@banned_channels) {
foreach my $account_mask (@account_masks) {
$account_mask =~ m/[^@]+\@(.*)/;
my $banmask = "*!*\@$1";
foreach my $baninfo (@bans) {
$self->{pbot}->logger->log("anti-flood: [check-bans] $account_mask evaded $baninfo->{banmask} banned in $baninfo->{channel} by $baninfo->{owner}\n");
$self->{pbot}->conn->privmsg($nick, "You have been banned in $baninfo->{channel} for attempting to evade a ban on $baninfo->{banmask} set by $baninfo->{owner}");
$self->{pbot}->logger->log("anti-flood: [check-bans] Ban detected on account $account in $banned_channel, banning $banmask.\n");
$self->{pbot}->chanops->ban_user_timed($banmask, $banned_channel, 60 * 60 * 5);
}
$account_mask =~ m/[^!]+\!(.*)/;
my $banmask = "*!$1";
$self->{pbot}->logger->log("anti-flood: [check-bans] Ban detected on account $account in $baninfo->{channel}, banning $banmask.\n");
$self->{pbot}->chanops->ban_user_timed($banmask, $baninfo->{channel}, 60 * 60 * 5);
}
}

17
PBot/BanTracker.pm
View File

@ -77,7 +77,14 @@ sub get_baninfo {
$baninfo->{channel} = $channel;
$baninfo->{owner} = $self->{banlist}{$channel}{$banmask_key}[0];
$baninfo->{when} = $self->{banlist}{$channel}{$banmask_key}[1];
$baninfo->{type} = $self->{banlist}{$channel}{$banmask_key}[2];
$self->{pbot}->logger->log("get-baninfo: dump: " . Dumper($baninfo) . "\n");
if($baninfo->{type} eq '+b' and $banmask_key =~ m/!\*@\*$/) {
$self->{pbot}->logger->log("get-baninfo: Disregarding generic nick ban\n");
return undef;
}
return $baninfo;
}
}
@ -96,7 +103,7 @@ sub on_quietlist_entry {
my $ago = ago(gettimeofday - $timestamp);
$self->{pbot}->logger->log("ban-tracker: [quietlist entry] $channel: $target quieted by $source $ago.\n");
$self->{banlist}->{$channel}->{$target} = [ $source, $timestamp ];
$self->{banlist}->{$channel}->{$target} = [ $source, $timestamp, '+q' ];
}
sub on_banlist_entry {
@ -109,7 +116,7 @@ sub on_banlist_entry {
my $ago = ago(gettimeofday - $timestamp);
$self->{pbot}->logger->log("ban-tracker: [banlist entry] $channel: $target banned by $source $ago.\n");
$self->{banlist}->{$channel}->{$target} = [ $source, $timestamp ];
$self->{banlist}->{$channel}->{$target} = [ $source, $timestamp, '+b' ];
}
sub track_mode {
@ -117,11 +124,11 @@ sub track_mode {
my ($source, $mode, $target, $channel) = @_;
if($mode eq "+b" or $mode eq "+q") {
$self->{pbot}->logger->log("ban-tracker: $target banned by $source in $channel.\n");
$self->{banlist}->{$channel}->{$target} = [ $source, gettimeofday ];
$self->{pbot}->logger->log("ban-tracker: $target " . ($mode eq '+b' ? 'banned' : 'quieted') . " by $source in $channel.\n");
$self->{banlist}->{$channel}->{$target} = [ $source, gettimeofday, $mode ];
}
elsif($mode eq "-b" or $mode eq "-q") {
$self->{pbot}->logger->log("ban-tracker: $target unbanned by $source in $channel.\n");
$self->{pbot}->logger->log("ban-tracker: $target " . ($mode eq '-b' ? 'unbanned' : 'unquieted') . " by $source in $channel.\n");
delete $self->{banlist}->{$channel}->{$target};
} else {
$self->{pbot}->logger->log("BanTracker: Unknown mode '$mode'\n");

2
PBot/VERSION.pm
View File

@ -13,7 +13,7 @@ use warnings;
# These are set automatically by the build/commit script
use constant {
BUILD_NAME => "PBot",
BUILD_REVISION => 339,
BUILD_REVISION => 340,
BUILD_DATE => "2011-12-14",
};