IP $IP has been banned until $DATE by $ADMIN because of $REASON
If you couldn\'t possibly be guilty of what you\'re banned for, the person we banned probably had a dynamic IP address and so do you.
See http://whatismyipaddress.com/dynamic-static for more information.
$CONTACT'
);
$this->check_ip_ban();
}
public function onPageRequest(PageRequestEvent $event)
{
if ($event->page_matches("ip_ban")) {
global $page, $user;
if ($user->can(Permissions::BAN_IP)) {
if ($event->get_arg(0) == "create" && $user->check_auth_token()) {
if (isset($_POST['c_ip']) && isset($_POST['c_reason']) && isset($_POST['c_expires'])) {
if (empty($_POST['c_expires'])) {
$end = null;
} else {
$end = date("Y-m-d H:i:s", strtotime(trim($_POST['c_expires'])));
}
send_event(new AddIPBanEvent($_POST['c_ip'], $_POST['c_reason'], $end));
flash_message("Ban for {$_POST['c_ip']} added");
$page->set_mode(PageMode::REDIRECT);
$page->set_redirect(make_link("ip_ban/list"));
}
} elseif ($event->get_arg(0) == "delete" && $user->check_auth_token()) {
if (isset($_POST['d_id'])) {
send_event(new RemoveIPBanEvent($_POST['d_id']));
flash_message("Ban removed");
$page->set_mode(PageMode::REDIRECT);
$page->set_redirect(make_link("ip_ban/list"));
}
} elseif ($event->get_arg(0) == "list") {
$pageNum = isset($_GET["r__page"]) ? int_escape($_GET["r__page"]) : 1;
$bans = $this->get_bans(isset($_GET["r_all"]), $pageNum);
$this->theme->display_bans($page, $bans);
}
} else {
$this->theme->display_permission_denied();
}
}
}
public function onSetupBuilding(SetupBuildingEvent $event)
{
$sb = new SetupBlock("IP Ban");
$sb->add_longtext_option("ipban_message", 'Message to show to banned users:
(with $IP, $DATE, $ADMIN, $REASON, and $CONTACT)');
$event->panel->add_block($sb);
}
public function onPageSubNavBuilding(PageSubNavBuildingEvent $event)
{
global $user;
if ($event->parent==="system") {
if ($user->can(Permissions::BAN_IP)) {
$event->add_nav_link("ip_bans", new Link('ip_ban/list'), "IP Bans", NavLink::is_active(["ip_ban"]));
}
}
}
public function onUserBlockBuilding(UserBlockBuildingEvent $event)
{
global $user;
if ($user->can(Permissions::BAN_IP)) {
$event->add_link("IP Bans", make_link("ip_ban/list"));
}
}
public function onAddIPBan(AddIPBanEvent $event)
{
global $cache, $user, $database;
$sql = "INSERT INTO bans (ip, reason, expires, banner_id) VALUES (:ip, :reason, :expires, :admin_id)";
$database->Execute($sql, ["ip"=>$event->ip, "reason"=>$event->reason, "expires"=>$event->expires, "admin_id"=>$user->id]);
$cache->delete("ip_bans_sorted");
log_info("ipban", "Banned {$event->ip} because '{$event->reason}' until {$event->expires}");
}
public function onRemoveIPBan(RemoveIPBanEvent $event)
{
global $cache, $database;
$ban = $database->get_row("SELECT * FROM bans WHERE id = :id", ["id"=>$event->id]);
if ($ban) {
$database->Execute("DELETE FROM bans WHERE id = :id", ["id"=>$event->id]);
$cache->delete("ip_bans_sorted");
log_info("ipban", "Removed {$ban['ip']}'s ban");
}
}
public function onDatabaseUpgrade(DatabaseUpgradeEvent $event)
{
global $database;
global $config;
// shortcut to latest
if ($this->get_version("ext_ipban_version") < 1) {
$database->create_table("bans", "
id SCORE_AIPK,
banner_id INTEGER NOT NULL,
ip SCORE_INET NOT NULL,
reason TEXT NOT NULL,
added TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
expires TIMESTAMP NULL DEFAULT NULL,
FOREIGN KEY (banner_id) REFERENCES users(id) ON DELETE CASCADE,
");
$database->execute("CREATE INDEX bans__expires ON bans(expires)");
$this->set_version("ext_ipban_version", 10);
}
// ===
if ($this->get_version("ext_ipban_version") < 1) {
$database->Execute("CREATE TABLE bans (
id int(11) NOT NULL auto_increment,
ip char(15) default NULL,
date TIMESTAMP default NULL,
end TIMESTAMP default NULL,
reason varchar(255) default NULL,
PRIMARY KEY (id)
)");
$this->set_version("ext_ipban_version", 1);
}
if ($this->get_version("ext_ipban_version") == 1) {
$database->execute("ALTER TABLE bans ADD COLUMN banner_id INTEGER NOT NULL AFTER id");
$this->set_version("ext_ipban_version", 2);
}
if ($this->get_version("ext_ipban_version") == 2) {
$database->execute("ALTER TABLE bans DROP COLUMN date");
$database->execute("ALTER TABLE bans CHANGE ip ip CHAR(20) NOT NULL");
$database->execute("ALTER TABLE bans CHANGE reason reason TEXT NOT NULL");
$database->execute("CREATE INDEX bans__end ON bans(end)");
$this->set_version("ext_ipban_version", 3);
}
if ($this->get_version("ext_ipban_version") == 3) {
$database->execute("ALTER TABLE bans CHANGE end old_end DATE NOT NULL");
$database->execute("ALTER TABLE bans ADD COLUMN end INTEGER");
$database->execute("UPDATE bans SET end = UNIX_TIMESTAMP(old_end)");
$database->execute("ALTER TABLE bans DROP COLUMN old_end");
$database->execute("CREATE INDEX bans__end ON bans(end)");
$this->set_version("ext_ipban_version", 4);
}
if ($this->get_version("ext_ipban_version") == 4) {
$database->execute("ALTER TABLE bans CHANGE end end_timestamp INTEGER");
$this->set_version("ext_ipban_version", 5);
}
if ($this->get_version("ext_ipban_version") == 5) {
$database->execute("ALTER TABLE bans CHANGE ip ip VARCHAR(15)");
$this->set_version("ext_ipban_version", 6);
}
if ($this->get_version("ext_ipban_version") == 6) {
$database->Execute("ALTER TABLE bans ADD FOREIGN KEY (banner_id) REFERENCES users(id) ON DELETE CASCADE");
$this->set_version("ext_ipban_version", 7);
}
if ($this->get_version("ext_ipban_version") == 7) {
$database->execute($database->scoreql_to_sql("ALTER TABLE bans CHANGE ip ip SCORE_INET"));
$database->execute("ALTER TABLE bans ADD COLUMN added TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP");
$this->set_version("ext_ipban_version", 8);
}
if ($this->get_version("ext_ipban_version") == 8) {
$database->execute("ALTER TABLE bans ADD COLUMN mode VARCHAR(16) NOT NULL DEFAULT 'block'");
$this->set_version("ext_ipban_version", 9);
}
if ($this->get_version("ext_ipban_version") == 9) {
$database->execute("ALTER TABLE bans ADD COLUMN expires TIMESTAMP DEFAULT NULL");
$database->execute("UPDATE bans SET expires = to_date('1970/01/01', 'YYYY/MM/DD') + (end_timestamp * interval '1 seconds')");
$database->execute("ALTER TABLE bans DROP COLUMN end_timestamp");
$database->execute("CREATE INDEX bans__expires ON bans(expires)");
$this->set_version("ext_ipban_version", 10);
}
}
private function check_ip_ban()
{
$remote = $_SERVER['REMOTE_ADDR'];
$bans = $this->get_active_bans_sorted();
// bans[0] = IPs
if (isset($bans[0][$remote])) {
$this->block($remote); // never returns
}
// bans[1] = CIDR nets
foreach ($bans[1] as $ip => $true) {
if (ip_in_range($remote, $ip)) {
$this->block($remote); // never returns
}
}
}
private function block(string $remote)
{
global $config, $database;
$prefix = ($database->get_driver_name() == DatabaseDriver::SQLITE ? "bans." : "");
$bans = $this->get_bans(false, null);
foreach ($bans as $row) {
$ip = $row[$prefix."ip"];
if (
(strstr($ip, '/') && ip_in_range($remote, $ip)) ||
($ip == $remote)
) {
$reason = $row[$prefix.'reason'];
$admin = User::by_id($row[$prefix.'banner_id']);
$date = $row['expires'];
$msg = $config->get_string("ipban_message");
$msg = str_replace('$IP', $ip, $msg);
$msg = str_replace('$DATE', $date, $msg);
$msg = str_replace('$ADMIN', $admin->name, $msg);
$msg = str_replace('$REASON', $reason, $msg);
$contact_link = contact_link();
if (!empty($contact_link)) {
$msg = str_replace('$CONTACT', "Contact the staff (be sure to include this message)", $msg);
} else {
$msg = str_replace('$CONTACT', "", $msg);
}
header("HTTP/1.0 403 Forbidden");
print "$msg";
exit;
}
}
log_error("ipban", "block($remote) called but no bans matched");
exit;
}
private function get_bans(bool $all, ?int $page)
{
global $database;
$size = 100;
if (@$_GET['limit']) {
$size = int_escape($_GET['limit']);
}
$filters = ["1=1"];
$args = [];
if (!$all) {
$filters[] = "((expires > CURRENT_TIMESTAMP) OR (expires IS NULL))";
}
if (@$_GET['s_ip']) {
$filters[] = "(ip = :ip)";
$args['ip'] = $_GET['s_ip'];
}
if (@$_GET['s_reason']) {
$filters[] = "(reason LIKE :reason)";
$args['reason'] = '%' . $_GET['s_reason'] . "%";
}
if (@$_GET['s_banner']) {
$filters[] = "(banner_id = :banner_id)";
$args['banner_id'] = User::by_name($_GET['s_banner'])->id;
}
if (@$_GET['s_added']) {
$filters[] = "(added LIKE :added)";
$args['added'] = '%' . $_GET['s_added'] . "%";
}
if (@$_GET['s_expires']) {
$filters[] = "(expires LIKE :expires)";
$args['expires'] = '%' . $_GET['s_expires'] . "%";
}
if (@$_GET['s_mode']) {
$filters[] = "(mode = :mode)";
$args['mode'] = $_GET['s_mode'];
}
$filter = implode(" AND ", $filters);
if (is_null($page)) {
$pager = "";
} else {
$pager = "LIMIT :limit OFFSET :offset";
$args["offset"] = ($page-1)*$size;
$args['limit'] = $size;
}
return $database->get_all("
SELECT bans.*, users.name as banner_name
FROM bans
JOIN users ON banner_id = users.id
WHERE $filter
ORDER BY expires, bans.id
$pager
", $args);
}
// returns [ips, nets]
private function get_active_bans_sorted()
{
global $cache;
$cached = $cache->get("ip_bans_sorted");
if ($cached) {
return $cached;
}
$bans = $this->get_bans(false, null);
$ips = []; # "0.0.0.0" => false);
$nets = []; # "0.0.0.0/32" => false);
foreach ($bans as $row) {
if (strstr($row['ip'], '/')) {
$nets[$row['ip']] = true;
} else {
$ips[$row['ip']] = true;
}
}
$sorted = [$ips, $nets];
$cache->set("ip_bans_sorted", $sorted, 600);
return $sorted;
}
}