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filter.inc
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filter.inc
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<?php
/*
Copyright (C) 2004-2007 Scott Ullrich
Copyright (C) 2005 Bill Marquette
Copyright (C) 2006 Peter Allgeyer
Copyright (C) 2008-2010 Ermal Luci
Copyright (C) 2003-2004 Manuel Kasper <mk@neon1.net>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
/* Create a global array to avoid errors on rulesets. */
$GatewaysList = array();
/* Used for the hostname dns resolver */
$filterdns = array();
/* Used for aliases and interface macros */
$aliases = "";
function alias_expand_urltable($name) {
global $config;
$urltable_prefix = "/var/db/aliastables/";
$urltable_filename = $urltable_prefix . $name . ".txt";
if (is_array($config['aliases']['alias'])) {
foreach ($config['aliases']['alias'] as $alias) {
if (preg_match("/urltable/i", $alias['type']) && ($alias['name'] == $name)) {
if (is_URL($alias["url"]) && file_exists($urltable_filename) && filesize($urltable_filename)) {
return $urltable_filename;
} elseif (process_alias_urltable($name, $alias["url"], 0, true)) {
return $urltable_filename;
}
} elseif ($alias['type'] == 'geoip' && $alias['name'] == $name) {
if (!file_exists($urltable_filename) || filesize($urltable_filename) == 0) {
if (download_alias_geoip($alias)) {
return $urltable_filename;
}
} else {
// alias file found and not 0 bytes
return $urltable_filename;
}
}
}
}
return null;
}
function fix_rule_label($descr)
{
$descr = str_replace('"', '', $descr);
if (strlen($descr) > 63) {
return substr($descr, 0, 60) . "...";
} else {
return $descr;
}
}
function is_bogonsv6_used()
{
global $config;
/*
* Only use bogonsv6 table if IPv6 Allow is on, and at least
* one enabled interface also has "blockbogons" enabled.
*/
$usebogonsv6 = false;
if (isset($config['system']['ipv6allow']) && isset($config['interfaces'])) {
foreach ($config['interfaces'] as $ifacedata) {
if (isset($ifacedata['enable']) && isset($ifacedata['blockbogons'])) {
$usebogonsv6 = true;
break;
}
}
}
return $usebogonsv6;
}
function download_file($url, $destination, $verify_ssl = false, $connect_timeout = 60, $timeout = 0)
{
global $config, $g;
$fp = fopen($destination, "wb");
if (!$fp) {
return false;
}
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
if (!$verify_ssl) {
/* leave the curl defaults untouched when verify is used */
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
}
curl_setopt($ch, CURLOPT_FILE, $fp);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $connect_timeout);
curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_USERAGENT, $g['product_name'] . '/' . rtrim(file_get_contents("/usr/local/opnsense/version/opnsense")));
@curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
fclose($fp);
curl_close($ch);
/*
* Crash reports indicated that this can fail on bad
* lines, causing the download to be "ok", but not
* actually writing the target file. Make it a hard
* failure...
*/
if (!file_exists($destination)) {
return false;
}
return ($http_code == 200);
}
function update_alias_names_upon_change($section, $field, $new_alias_name, $origname, $field_separator=null)
{
global $config;
if (!empty($origname) && !empty($new_alias_name)) {
// find section, return if not found
$sectionref = &$config;
foreach ($section as $sectionname) {
if (!empty($sectionref[$sectionname]) && is_array($sectionref[$sectionname])) {
$sectionref = &$sectionref[$sectionname];
} else {
return;
}
}
// traverse all found sections
foreach($sectionref as $itemkey => $item) {
// locate field within structure
$fieldref = &$sectionref[$itemkey];
foreach($field as $fieldname) {
if (!empty($fieldref[$fieldname])) {
$fieldref = &$fieldref[$fieldname];
} else {
unset($fieldref);
break;
}
}
// if field is found, check and replace
if (isset($fieldref) && !is_array($fieldref)) {
if ($fieldref == $origname) {
$fieldref = $new_alias_name;
} elseif ($field_separator != null) {
// field contains more then one value
$parts = explode($field_separator, $fieldref);
foreach ($parts as &$part) {
if ($part == $origname) {
$part = $new_alias_name;
}
}
$new_field_value = implode($field_separator, $parts);
if ($new_field_value != $fieldref) {
$fieldref = $new_field_value;
}
}
}
}
}
}
function process_alias_urltable($name, $url, $freq, $forceupdate = false)
{
global $config;
$urltable_prefix = "/var/db/aliastables/";
$urltable_filename = $urltable_prefix . $name . ".txt";
// Make the aliases directory if it doesn't exist
if (!file_exists($urltable_prefix)) {
mkdir($urltable_prefix);
} elseif (!is_dir($urltable_prefix)) {
unlink($urltable_prefix);
mkdir($urltable_prefix);
}
if (empty($freq)) {
$freq = 1;
}
$update_freq = ($freq * 86400) - 90;
// If the file doesn't exist or is older than update_freq days, fetch a new copy.
if (!file_exists($urltable_filename) || ((time() - filemtime($urltable_filename)) > $update_freq) || $forceupdate) {
// open file handle to output file, in case the process takes a lot of time, make sure there's a file before
// filter starts to load. Also helps for tracking progress.
//
// todo: rethink alias_expand_urltable in filter.inc , its probably not a very good idea to download and
// process files during boot.
$output_file_handle = fopen($urltable_filename, 'w');
$alias_type = alias_get_type($name);
// Try to fetch the URL supplied
@unlink("{$urltable_filename}.tmp");
$verify_ssl = isset($config['system']['checkaliasesurlcert']);
if (download_file($url, "{$urltable_filename}.tmp", $verify_ssl)) {
foreach (preg_split('/[\n\r]+/', file_get_contents("{$urltable_filename}.tmp"), -1, PREG_SPLIT_NO_EMPTY) as $line) {
$line = trim($line);
if (!strlen($line) || !strncmp($line, '#', 1) || !strncmp($line, '//', 2)) {
continue;
}
// cleanse line item
$line = preg_split('/\s+/', $line)[0];
if ($alias_type == "urltable_ports") {
// todo: add proper validation for ports here
fwrite($output_file_handle, "{$line}\n");
} else {
// validate or resolve line items, skip unparseable content
if (is_subnet($line) || is_ipaddr($line)) {
fwrite($output_file_handle, "{$line}\n");
} elseif (is_hostname($line)) {
foreach (array(DNS_AAAA, DNS_A) as $dns_type) {
// normally dns_get_record should be able to use DNS_A + DNS_AAAA
// but for some strange reason not on our platform...
$dns_records = @dns_get_record($line, $dns_type);
if ($dns_records) {
foreach ($dns_records as $dns_record) {
if (!empty($dns_record['ipv6'])) {
fwrite($output_file_handle, $dns_record['ipv6'] . "\n");
} elseif (!empty($dns_record['ip'])) {
fwrite($output_file_handle, $dns_record['ip'] . "\n");
}
}
}
}
}
fflush($output_file_handle);
}
}
fclose($output_file_handle);
if ($alias_type == "urltable_ports") {
$ports = explode("\n", file_get_contents($urltable_filename));
$ports = group_ports($ports);
file_put_contents($urltable_filename, implode("\n", $ports));
}
@unlink("{$urltable_filename}.tmp");
} else {
touch($urltable_filename);
}
return true;
} else {
// File exists, and it doesn't need updated.
return -1;
}
}
/* sort by interface only, retain the original order of rules that apply to
the same interface */
function filter_rules_sort()
{
global $config;
/* mark each rule with the sequence number (to retain the order while sorting) */
for ($i = 0; isset($config['filter']['rule'][$i]); $i++) {
$config['filter']['rule'][$i]['seq'] = $i;
}
usort($config['filter']['rule'], function($a, $b){
if (isset($a['floating']) && isset($b['floating'])) {
return $a['seq'] - $b['seq'];
} elseif (isset($a['floating'])) {
return -1;
} elseif (isset($b['floating'])) {
return 1;
} elseif ($a['interface'] == $b['interface']) {
return $a['seq'] - $b['seq'];
} elseif ($a['interface'] == $b['interface']) {
return 0;
} elseif ($a['interface'] == 'wan') {
return -1;
} elseif ($b['interface'] == 'wan') {
return 1;
} elseif ($a['interface'] == 'lan') {
return -1;
} elseif ($b['interface'] == 'lan') {
return 1;
} else {
return strnatcmp($a['interface'], $b['interface']);
}
});
/* strip the sequence numbers again */
for ($i = 0; isset($config['filter']['rule'][$i]); $i++) {
unset($config['filter']['rule'][$i]['seq']);
}
}
function filter_pflog_start()
{
if (isvalidpid('/var/run/filterlog.pid')) {
return;
}
mwexec('/usr/local/sbin/filterlog -i pflog0 -p /var/run/filterlog.pid');
}
function filter_configure()
{
global $config;
/*
* NOTE: Check here for bootup status since this should not be triggered during bootup.
* The reason is that rc.bootup calls filter_configure_sync directly which does this too.
*/
if (!file_exists("/var/run/booting")) {
configd_run('filter reload');
if ( !empty($config['hasync']['synchronizetoip'])) {
configd_run('filter sync restart');
}
}
}
function filter_delete_states_for_down_gateways()
{
global $config, $GatewaysList;
$any_gateway_down = false;
$a_gateways = return_gateways_status();
if (is_array($GatewaysList)) {
foreach ($GatewaysList as $gwname => $gateway) {
if (empty($gateway['monitor'])) {
continue;
} elseif (!is_ipaddr($gateway['monitor'])) {
continue;
} elseif (strstr($gateway['monitor'], "127.0.0.")) {
continue;
} elseif (empty($a_gateways[$gateway['monitor']])) {
continue;
}
$gwstatus =& $a_gateways[$gateway['monitor']];
if (strstr($gwstatus['status'], "down")) {
$any_gateway_down = true;
break;
}
}
}
if ($any_gateway_down == true) {
mwexec("/sbin/pfctl -Fs");
}
}
function filter_configure_sync($verbose = false)
{
global $config, $filterdns, $aliases;
/* holds the tables to be flushed *AFTER* the filter is fully loaded */
$after_filter_configure_run = array();
$FilterIflist = filter_generate_optcfg_array();
// initialize fw plugin object
$fw = new \OPNsense\Firewall\Plugin();
if (function_exists('plugins_firewall')) {
plugins_firewall($fw);
}
/* Use filter lock to not allow concurrent filter reloads during this run. */
$filterlck = lock('filter', LOCK_EX);
filter_pflog_start();
update_filter_reload_status(gettext("Initializing"), true);
if ($verbose) {
echo 'Configuring firewall.';
flush();
}
/* generate aliases */
update_filter_reload_status(gettext("Creating aliases"));
$aliases = filter_generate_aliases($FilterIflist, $after_filter_configure_run);
$gateways = filter_generate_gateways();
if ($verbose) {
echo '.';
flush();
}
/* generate nat rules */
update_filter_reload_status(gettext("Generating NAT rules"));
$natrules = filter_nat_rules_generate($FilterIflist);
if ($verbose) {
echo '.';
flush();
}
/* generate pfctl rules */
update_filter_reload_status(gettext("Generating filter rules"));
$pfrules = filter_rules_generate($FilterIflist);
if ($verbose) {
echo '.';
flush();
}
/* enable pf if we need to, otherwise disable */
update_filter_reload_status(gettext("Loading filter rules"));
if (!isset ($config['system']['disablefilter'])) {
mwexec("/sbin/pfctl -e", true);
} else {
mwexec("/sbin/pfctl -d", true);
update_filter_reload_status(gettext("Filter is disabled. Not loading rules."));
if ($verbose) {
echo "done.\n";
}
unlock($filterlck);
return;
}
if ($verbose) {
echo '.';
flush();
}
$limitrules = "";
/* User defined maximum table entries in Advanced menu. */
if (!empty($config['system']['maximumtableentries']) && is_numeric($config['system']['maximumtableentries'])) {
$limitrules .= "set limit table-entries {$config['system']['maximumtableentries']}\n";
}
if ($config['system']['optimization'] <> "") {
$limitrules .= "set optimization {$config['system']['optimization']}\n";
if ($config['system']['optimization'] == "conservative") {
$limitrules .= "set timeout { udp.first 300, udp.single 150, udp.multiple 900 }\n";
}
} else {
$limitrules .= "set optimization normal\n";
}
if (!empty($config['system']['adaptivestart']) && !empty($config['system']['adaptiveend'])) {
$limitrules .= "set timeout { adaptive.start {$config['system']['adaptivestart']}, adaptive.end {$config['system']['adaptiveend']} }\n";
} else {
$limitrules .= "set timeout { adaptive.start 0, adaptive.end 0 }\n";
}
if (!empty($config['system']['maximumstates']) && is_numeric($config['system']['maximumstates'])) {
/* User defined maximum states in Advanced menu. */
$limitrules .= "set limit states {$config['system']['maximumstates']}\n";
$limitrules .= "set limit src-nodes {$config['system']['maximumstates']}\n";
} else {
$max_states = default_state_size();
$limitrules .= "set limit states {$max_states}\n";
$limitrules .= "set limit src-nodes {$max_states}\n";
}
if (!empty($config['system']['maximumfrags'])) {
$limitrules .= "set limit frags {$config['system']['maximumfrags']}\n";
}
if (isset($config['system']['lb_use_sticky']) && is_numeric($config['system']['srctrack']) && ($config['system']['srctrack'] > 0)) {
$limitrules .= "set timeout src.track {$config['system']['srctrack']}\n";
}
$rules = "{$limitrules}\n";
$rules .= "{$aliases} \n";
$rules .= "{$gateways} \n";
update_filter_reload_status(gettext("Setting up logging information"));
$rules .= filter_setup_logging_interfaces($FilterIflist);
$rules .= "\n";
$rules .= "set skip on pfsync0\n";
$rules .= "\n";
update_filter_reload_status(gettext("Setting up SCRUB information"));
$rules .= filter_generate_scrubing($FilterIflist);
$rules .= "\n";
$rules .= $fw->anchorToText('nat,binat,rdr', 'head');
$rules .= "{$natrules}\n";
$rules .= $fw->anchorToText('nat,binat,rdr', 'tail');
$rules .= $fw->anchorToText('fw', 'head');
$rules .= "{$pfrules}\n";
$rules .= $fw->anchorToText('fw', 'tail');
unset($aliases, $gateways, $natrules, $pfrules);
// Copy rules.debug to rules.debug.old
if (file_exists('/tmp/rules.debug')) {
@copy('/tmp/rules.debug', '/tmp/rules.debug.old');
}
if (!@file_put_contents('/tmp/rules.debug', $rules, LOCK_EX)) {
log_error("WARNING: Could not write new rules!");
unlock($filterlck);
return;
}
@file_put_contents('/tmp/rules.limits', $limitrules);
mwexec('/sbin/pfctl -Of /tmp/rules.limits');
unset($rules, $limitrules);
unset($rules_loading, $rules_error);
$_grbg = exec('/sbin/pfctl -o basic -f /tmp/rules.debug 2>&1', $rules_error, $rules_loading);
/*
* check for a error while loading the rules file. if an error has occurred
* then output the contents of the error to the caller
*/
if ($rules_loading) {
/* XXX ALTQ not loaded message compat */
$altq_strip = 2;
if (count($rules_error) >= $altq_strip) {
foreach (range(1, $altq_strip) as $altq_unused) {
if (strpos($rules_error[0], 'ALTQ') !== false) {
array_shift($rules_error);
}
}
}
$saved_line_error = $rules_error[0];
$config_line_error = '';
$line_error = explode(":", $rules_error[0]);
if (isset($line_error[1])) {
// only report issues with line numbers
$line_number = $line_error[1];
$line_split = file('/tmp/rules.debug');
if (is_array($line_split)) {
$config_line_error = sprintf(' - ' . gettext('The line in question reads [%d]: %s'), $line_number, $line_split[$line_number-1]);
}
unset($line_split);
}
/* Brutal ugly hack but required -- PF is stuck, unwedge */
if (strstr("$rules_error[0]", "busy")) {
exec('/sbin/pfctl -d; /sbin/pfctl -e; /sbin/pfctl -f /tmp/rules.debug');
$error_msg = gettext("PF was wedged/busy and has been reset.");
file_notice("pf_busy", $error_msg, "pf_busy", "");
} else {
$_grbg = exec('/sbin/pfctl -o basic -f /tmp/rules.debug.old 2>&1');
}
unset($rules_loading, $rules_error);
file_notice('filter_load', sprintf(gettext('There were error(s) loading the rules: %s%s'), $saved_line_error, $config_line_error), 'Filter Reload', '');
update_filter_reload_status(sprintf(gettext('There were error(s) loading the rules: %s%s'), $saved_line_error, $config_line_error));
unlock($filterlck);
return;
}
# If we are not using bogonsv6 then we can remove any bogonsv6 table from the running pf (if the table is not there, the kill is still fine).
if (!is_bogonsv6_used()) {
$_grbg = exec('/sbin/pfctl -t bogonsv6 -T kill 2>/dev/null');
}
if (!empty($filterdns)) {
@file_put_contents('/var/etc/filterdns.conf', implode('', $filterdns));
unset($filterdns);
if (isvalidpid('/var/run/filterdns.pid')) {
killbypid('/var/run/filterdns.pid', 'HUP');
} else {
/*
* FilterDNS has three debugging levels. The default choosen is 1.
* Availabe are level 2 and greater then 2.
*/
if (isset($config['system']['aliasesresolveinterval']) && is_numeric($config['system']['aliasesresolveinterval'])) {
$resolve_interval = $config['system']['aliasesresolveinterval'];
} else {
$resolve_interval = 300;
}
mwexec("/usr/local/sbin/filterdns -p /var/run/filterdns.pid -i {$resolve_interval} -c /var/etc/filterdns.conf -d 1");
}
} else {
killbypid('/var/run/filterdns.pid');
}
/* run items scheduled for after filter configure run */
foreach ($after_filter_configure_run as $afcr) {
mwexecf('/sbin/pfctl -T flush -t %s', $afcr);
}
if ($verbose) {
echo '.';
flush();
}
update_filter_reload_status(gettext("Processing down interface states"));
if (!isset($config['system']['kill_states'])) {
filter_delete_states_for_down_gateways();
}
update_filter_reload_status(gettext("Done"));
if ($verbose) {
echo "done.\n";
}
unlock($filterlck);
return 0;
}
function filter_generate_scrubing(&$FilterIflist)
{
global $config;
$scrubrules = '';
/* custom rules must be first */
if (!empty($config['filter']['scrub']['rule'])) {
foreach ($config['filter']['scrub']['rule'] as $scrub_rule) {
if (!isset($scrub_rule['disabled'])) {
$scrub_rule_out = "scrub";
$scrub_rule_out .= !empty($scrub_rule['direction']) ? " " . $scrub_rule['direction'] : "" ;
$scrub_rule_out .= " on ";
$interfaces = array();
foreach (explode(',', $scrub_rule['interface']) as $interface) {
if (!empty($FilterIflist[$interface]['if'])) {
$interfaces[] = $FilterIflist[$interface]['if'];
}
}
$scrub_rule_out .= count($interfaces) > 1 ? "{ ". implode(' ', $interfaces) . " } " : $interfaces[0];
$scrub_rule_out .= $scrub_rule['proto'] != 'any' ? " proto " . $scrub_rule['proto'] : "";
$scrub_rule_out .= " from ";
if (is_alias($scrub_rule['src'])) {
$scrub_rule_out .= !empty($scrub_rule['srcnot']) ? "!" : "";
$scrub_rule_out .= '$'.$scrub_rule['src'];
} elseif (is_ipaddr($scrub_rule['src'])) {
$scrub_rule_out .= !empty($scrub_rule['srcnot']) ? "!" : "";
$scrub_rule_out .= $scrub_rule['src'] . "/" . $scrub_rule['srcmask'];
} else {
$scrub_rule_out .= "any";
}
$scrub_rule_out .= !empty($scrub_rule['srcport']) ? " port " . $scrub_rule['srcport'] : "";
$scrub_rule_out .= " to ";
if (is_alias($scrub_rule['dst'])) {
$scrub_rule_out .= !empty($scrub_rule['dstnot']) ? "!" : "";
$scrub_rule_out .= '$'.$scrub_rule['dst'];
} elseif (is_ipaddr($scrub_rule['dst'])) {
$scrub_rule_out .= !empty($scrub_rule['dstnot']) ? "!" : "";
$scrub_rule_out .= $scrub_rule['dst'] . "/" . $scrub_rule['dstmask'];
} else {
$scrub_rule_out .= "any";
}
$scrub_rule_out .= !empty($scrub_rule['dstport']) ? " port " . $scrub_rule['dstport'] : "";
$scrub_rule_out .= !empty($scrub_rule['no-df']) ? " no-df " : "";
$scrub_rule_out .= !empty($scrub_rule['random-id']) ? " random-id " : "";
$scrub_rule_out .= !empty($scrub_rule['max-mss']) ? " max-mss " . $scrub_rule['max-mss'] . " " : "";
$scrub_rule_out .= !empty($scrub_rule['min-ttl']) ? " min-ttl " . $scrub_rule['min-ttl'] . " " : "";
$scrub_rule_out .= !empty($scrub_rule['set-tos']) ? " set-tos " . $scrub_rule['set-tos'] . " " : "";
$scrub_rule_out .= "\n";
$scrubrules .= $scrub_rule_out;
}
}
}
/* scrub per interface options */
if (empty($config['system']['scrub_interface_disable'])) {
foreach ($FilterIflist as $scrubif => $scrubcfg) {
if (isset($scrubcfg['virtual']) || empty($scrubcfg['descr'])) {
continue;
} else {
/* set up MSS clamping */
if (!empty($scrubcfg['mss']) && is_numeric($scrubcfg['mss']) &&
!in_array($scrubcfg['if'], array('pppoe', 'pptp', 'l2tp'))) {
$mssclamp = "max-mss " . (intval($scrubcfg['mss'] - 40));
} else {
$mssclamp = '';
}
$scrubnodf = !empty($config['system']['scrubnodf']) ? "no-df" : "";
$scrubrnid = !empty($config['system']['scrubrnid']) ? "random-id" : "";
$scrubrules .= "scrub on \${$scrubcfg['descr']} all {$scrubnodf} {$scrubrnid} {$mssclamp}\n";
}
}
}
return $scrubrules;
}
function filter_generate_nested_alias($name, $alias, &$aliasnesting, &$aliasaddrnesting) {
global $aliastable, $filterdns;
$addresses = explode(" ", $alias);
$finallist = "";
$builtlist = "";
$urltable_nesting = "";
$aliasnesting[$name] = $name;
foreach ($addresses as $address) {
if (empty($address)) {
continue;
}
$linelength = strlen($builtlist);
$tmpline = "";
if (is_alias($address)) {
if (alias_get_type($address) == 'urltable') {
// Feature#1603. For this type of alias we do not need to recursively call filter_generate_nested_alias. Just load IPs from the file.
$urltable_netsting = alias_expand_urltable($address);
if (!empty($urltable_nesting)) {
$urlfile_as_arr = file($urltable_nesting);
foreach($urlfile_as_arr as $line) {
$address= rtrim($line);
if ((strlen($tmpline) + $linelength) > 4036) {
$finallist .= "{$tmpline} \\\n";
$tmpline = "";
}
$tmpline .= " {$address}";
}
}
} elseif (!isset($aliasnesting[$address])) {
/* We already expanded this alias so there is no neccessity to do it again. */
$tmpline = filter_generate_nested_alias($name, $aliastable[$address], $aliasnesting, $aliasaddrnesting);
}
} elseif (!isset($aliasaddrnesting[$address])) {
if (!is_ipaddr($address) && !is_subnet($address) && !is_port($address) && !is_portrange($address) && is_hostname($address)) {
if (!isset($filterdns["{$address}{$name}"]) && in_array(alias_get_type($name), array('host'))) {
$filterdns["{$address}{$name}"] = "pf {$address} {$name}\n";
}
continue;
}
$aliasaddrnesting[$address] = $address;
$tmpline = " {$address}";
}
if ((strlen($tmpline)+ $linelength) > 4036) {
$finallist .= "{$builtlist} \\\n";
$builtlist = "";
}
if (!empty($tmpline)) {
$builtlist .= " {$tmpline}";
}
}
$finallist .= $builtlist;
return $finallist;
}
function filter_expand_alias($alias_name)
{
global $config;
if (isset($config['aliases']['alias'])) {
foreach ($config['aliases']['alias'] as $aliased) {
if ($aliased['name'] == $alias_name) {
$aliasnesting = array();
$aliasaddrnesting = array();
return filter_generate_nested_alias($aliased['name'], $aliased['address'], $aliasnesting, $aliasaddrnesting);
}
}
}
}
function filter_expand_alias_array($alias_name) {
$expansion = filter_expand_alias($alias_name);
return explode(" ", preg_replace('/\s+/', ' ', trim($expansion)));
}
function filter_generate_aliases(&$FilterIflist, &$after_filter_configure_run)
{
global $config;
$aliases = "# System aliases\n";
$aliases .= "loopback = \"{ lo0 }\"\n";
foreach ($FilterIflist as $if => $ifcfg) {
if (!empty($ifcfg['descr']) && !empty($ifcfg['if'])) {
if (isset($ifcfg['type6']) && $ifcfg['type6'] == '6rd') {
$aliases .= "{$ifcfg['descr']} = \"{ {$ifcfg['if']} {$if}_stf";
} elseif (isset($ifcfg['type6']) && $ifcfg['type6'] == '6to4') {
$aliases .= "{$ifcfg['descr']} = \"{ {$ifcfg['if']} {$if}_stf";
} else {
$aliases .= "{$ifcfg['descr']} = \"{ {$ifcfg['if']}";
if (isset($ifcfg['type']) && $ifcfg['type'] == 'pptp') {
foreach (get_parent_interface($ifcfg['if']) as $parent_if) {
if ($parent_if != $ifcfg['if']) {
$aliases .= " {$parent_if}";
}
}
}
}
$aliases .= " }\"\n";
}
}
$aliases .= "\n# SSH Lockout Table\n";
$aliases .= "table <sshlockout> persist\n";
$aliases .= "table <webConfiguratorlockout> persist\n";
$aliases .= "# Other tables\n";
$aliases .= "table <virusprot>\n";
touch('/usr/local/etc/bogons');
touch('/usr/local/etc/bogonsv6');
$aliases .= "table <bogons> persist file \"/usr/local/etc/bogons\"\n";
if (is_bogonsv6_used()) {
$aliases .= "table <bogonsv6> persist file \"/usr/local/etc/bogonsv6\"\n";
}
$aliases .= "\n# User Aliases \n";
/* Setup pf groups */
if (isset($config['aliases']['alias'])) {
foreach ($config['aliases']['alias'] as $aliased) {
$aliasnesting = array();
$aliasaddrnesting = array();
$addrlist = filter_generate_nested_alias($aliased['name'], $aliased['address'], $aliasnesting, $aliasaddrnesting);
switch ($aliased['type']) {
case "host":
case "network":
case "url":
if (empty($addrlist)) {
$aliases .= "table <{$aliased['name']}> persist\n";
if (empty($aliased['address'])) {
$after_filter_configure_run[] = $aliased['name'];
}
} else {
$aliases .= "table <{$aliased['name']}> { {$addrlist} } \n";
}
$aliases .= "{$aliased['name']} = \"<{$aliased['name']}>\"\n";
break;
case "urltable":
case "geoip":
$urlfn = alias_expand_urltable($aliased['name']);
if ($urlfn) {
$aliases .= "table <{$aliased['name']}> persist file \"{$urlfn}\"\n";
$aliases .= "{$aliased['name']} = \"<{$aliased['name']}>\"\n";
}
break;
case "urltable_ports":
$urlfn = alias_expand_urltable($aliased['name']);
if ($urlfn) {
$aliases .= "{$aliased['name']} = \"{ " . preg_replace("/\n/", " ", file_get_contents($urlfn)) . " }\"\n";
}
break;
case "port":
case "url_ports":
$aliases .= "{$aliased['name']} = \"{ {$addrlist} }\"\n";
break;
default:
$aliases .= "{$aliased['name']} = \"{ {$aliased['address']} }\"\n";
break;
}
}
}
return $aliases;
}
function filter_generate_gateways()
{
global $config, $GatewaysList;
$rules = "# Gateways\n";
update_filter_reload_status(gettext("Creating gateway group item..."));
/* Lookup Gateways to be used in filter rules once */
$GatewaysList = return_gateways_array(false, true);
$GatewayGroupsList = return_gateway_groups_array();
if (is_array($GatewaysList)) {
foreach ($GatewaysList as $gwname => $gateway) {
$int = $gateway['interface'];
$gwip = $gateway['gateway'];
$route = "";
if (!is_ipaddr($gwip)) {
$gwip = get_interface_gateway($gateway['friendlyiface']);
}
if (is_ipaddr($gwip) && !empty($int)) {
$route = "route-to ( {$int} {$gwip} )";
}
if (($route === "") && isset($config['system']['skip_rules_gw_down'])) {
unset($GatewaysList[$gwname]);
}
else {
$rules .= "GW{$gwname} = \" {$route} \"\n";
}
}
}
if (is_array($GatewayGroupsList)) {
foreach ($GatewayGroupsList as $gateway => $members) {
$route = "";
/* hey, that's not a group member! */
unset($members['ipprotocol']);
if (count($members) > 0) {
$foundlb = 0;
$routeto = "";
foreach($members as $idx => $member) {
$int = $member['int'];
$gatewayip = $member['gwip'];
if (($int <> "") && is_ipaddr($gatewayip)) {
if ($member['weight'] > 1) {
$routeto .= str_repeat("( {$int} {$gatewayip} ) ", $member['weight']);
} else {
$routeto .= "( {$int} {$gatewayip} ) ";
}
$foundlb++;
} else {
log_error(sprintf('An error occurred while trying to find the interface got %s. The rule has not been added.', $gatewayip));
}
}
$route = "";
if ($foundlb > 0) {
$route = " route-to { {$routeto} } ";
if ($foundlb > 1) {
$route .= " round-robin ";
if (isset($config['system']['lb_use_sticky'])) {
$route .= " sticky-address ";
}
}
}
}
if (($route === "") && isset($config['system']['skip_rules_gw_down'])) {
unset($GatewayGroupsList[$gateway]);
} else {
$rules .= "GW{$gateway} = \" {$route} \"\n";
}
}
}
/* Create a global array to avoid errors on rulesets. */
$GatewaysList = $GatewaysList + $GatewayGroupsList;
$rules .= "\n";
return $rules;
}
/* returns space separated list of directly connected networks
* optionally returns an array instead, including friendly interface and gateway (if applicable)
*/
function filter_get_direct_networks_list(&$FilterIflist, $returnsubnetsonly = true)
{
global $config, $GatewaysList;
/* build list of directly connected interfaces and networks */
$networks = "";
$networks_arr = array();
foreach ($FilterIflist as $ifent => $ifcfg) {
$subnet = "{$ifcfg['sa']}/{$ifcfg['sn']}";
if (is_subnet($subnet)) {
if ($returnsubnetsonly) {
$networks_arr[] = $subnet;
} else {
$networks_arr[] = array(
'subnet' => $subnet,
'if' => $ifent,
'ip' => $ifcfg['ip']);
}
}
}
foreach(get_configured_ip_aliases_list(true) as $vip) {
$subnet = "{$vip['subnet']}/{$vip['subnet_bits']}";
if (is_subnet($subnet) && !(is_subnetv4($subnet) && $vip['subnet_bits'] == 32) && !(is_subnetv6($subnet) && $vip['subnet_bits'] == 128)) {
if (is_subnetv4($subnet)) {
$subnet = gen_subnet($vip['subnet'], $vip['subnet_bits']) . "/{$vip['subnet_bits']}";
} elseif (is_subnetv6($subnet)) {
$subnet = gen_subnetv6($vip['subnet'], $vip['subnet_bits']) . "/{$vip['subnet_bits']}";
}
if ($returnsubnetsonly) {
$networks_arr[] = $subnet;
} else {
$networks_arr[] = array(
'subnet' => $subnet,
'if' => $vip['interface'],
'ip' => $vip['subnet']);
}
}
}
foreach(get_staticroutes() as $netent) {
if (is_subnet($netent['network'])) {
if ($returnsubnetsonly) {
$networks_arr[] = $netent['network'];
} elseif (isset($GatewaysList[$netent['gateway']])) {
$networks_arr[] = array(
'subnet' => $netent['network'],
'if' => $GatewaysList[$netent['gateway']]['friendlyiface'],
'gateway' => $GatewaysList[$netent['gateway']]['gateway']);
}
}
}
if ($returnsubnetsonly) {
if (!empty($networks_arr)) {
$networks = implode(" ", $networks_arr);
}
return $networks;
} else {
return $networks_arr;
}
}
function filter_generate_optcfg_array()
{