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c0b6fdde
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jim-p
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<?php
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/*
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easyrule.inc.php
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998f77a8
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jim-p
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Copyright (C) 2009-2010 Jim Pingle (jpingle@gmail.com)
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Originally Sponsored By Anathematic @ pfSense Forums
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c0b6fdde
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jim-p
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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| 30 |
7ac5a4cb
|
Scott Ullrich
|
/*
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| 31 |
dadad8b3
|
jim-p
|
pfSense_BUILDER_BINARIES:
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| 32 |
7ac5a4cb
|
Scott Ullrich
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pfSense_MODULE: filter
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*/
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c0b6fdde
|
jim-p
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$blockaliasname = 'EasyRuleBlockHosts';
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865ff9b4
|
jim-p
|
$protocols_with_ports = array('tcp', 'udp');
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require_once("functions.inc");
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require_once("util.inc");
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require_once("config.inc");
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4d828a9a
|
Ermal Lu?i
|
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| 41 |
c0b6fdde
|
jim-p
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function easyrule_find_rule_interface($int) {
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global $config;
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/* Borrowed from firewall_rules.php */
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4d828a9a
|
Ermal Lu?i
|
$iflist = get_configured_interface_with_descr(false, true);
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dadad8b3
|
jim-p
|
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| 46 |
c0b6fdde
|
jim-p
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if ($config['pptpd']['mode'] == "server")
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$iflist['pptp'] = "PPTP VPN";
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dadad8b3
|
jim-p
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8c5df705
|
jim-p
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if (is_pppoe_server_enabled() && have_ruleint_access("pppoe"))
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c0b6fdde
|
jim-p
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$iflist['pppoe'] = "PPPoE VPN";
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| 51 |
dadad8b3
|
jim-p
|
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| 52 |
4d828a9a
|
Ermal Lu?i
|
if ($config['l2tp']['mode'] == "server")
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$iflist['l2tp'] = "L2TP VPN";
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c0b6fdde
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jim-p
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/* add ipsec interfaces */
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c6dfd289
|
jim-p
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if (isset($config['ipsec']['enable']) || isset($config['ipsec']['client']['enable'])){
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c0b6fdde
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jim-p
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$iflist["enc0"] = "IPSEC";
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}
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dadad8b3
|
jim-p
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c0b6fdde
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jim-p
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if (isset($iflist[$int]))
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return $int;
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foreach ($iflist as $if => $ifd) {
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if (strtolower($int) == strtolower($ifd))
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return $if;
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}
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dadad8b3
|
jim-p
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| 68 |
066afaf1
|
jim-p
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if (substr($int, 0, 4) == "ovpn")
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return "openvpn";
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c0b6fdde
|
jim-p
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return false;
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}
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function easyrule_block_rule_exists($int = 'wan') {
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global $blockaliasname, $config;
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/* No rules, we we know it doesn't exist */
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if (!is_array($config['filter']['rule'])) {
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return false;
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}
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/* Search through the rules for one referencing our alias */
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28a581b8
|
jim-p
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foreach ($config['filter']['rule'] as $rule) {
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f3704cb2
|
jim-p
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if (!is_array($rule) || !is_array($rule['source']))
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continue;
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c0b6fdde
|
jim-p
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if ($rule['source']['address'] == $blockaliasname . strtoupper($int) && ($rule['interface'] == $int))
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return true;
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28a581b8
|
jim-p
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}
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c0b6fdde
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jim-p
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return false;
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}
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function easyrule_block_rule_create($int = 'wan') {
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global $blockaliasname, $config;
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/* If the alias doesn't exist, exit.
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* Can't create an empty alias, and we don't know a host */
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if (easyrule_block_alias_getid($int) === false)
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return false;
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/* If the rule already exists, no need to do it again */
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if (easyrule_block_rule_exists($int))
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return true;
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/* No rules, start a new array */
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if (!is_array($config['filter']['rule'])) {
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$config['filter']['rule'] = array();
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}
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filter_rules_sort();
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$a_filter = &$config['filter']['rule'];
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/* Make up a new rule */
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$filterent = array();
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$filterent['type'] = 'block';
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dadad8b3
|
jim-p
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$filterent['interface'] = $int;
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c0b6fdde
|
jim-p
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$filterent['source']['address'] = $blockaliasname . strtoupper($int);
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$filterent['destination']['any'] = '';
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$filterent['descr'] = "Easy Rule: Blocked from Firewall Log View";
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a0140246
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jim-p
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array_splice($a_filter, 0, 0, array($filterent));
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c0b6fdde
|
jim-p
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return true;
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}
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function easyrule_block_alias_getid($int = 'wan') {
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| 124 |
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global $blockaliasname, $config;
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if (!is_array($config['aliases']))
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return false;
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| 127 |
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| 128 |
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/* Hunt down an alias with the name we want, return its id */
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foreach ($config['aliases']['alias'] as $aliasid => $alias)
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if ($alias['name'] == $blockaliasname . strtoupper($int))
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return $aliasid;
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return false;
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}
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| 135 |
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| 136 |
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function easyrule_block_alias_add($host, $int = 'wan') {
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global $blockaliasname, $config;
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/* If the host isn't a valid IP address, bail */
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if (!is_ipaddr($host))
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return false;
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| 141 |
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| 142 |
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/* If there are no aliases, start an array */
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if (!is_array($config['aliases']['alias']))
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$config['aliases']['alias'] = array();
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$a_aliases = &$config['aliases']['alias'];
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/* Try to get the ID if the alias already exists */
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$id = easyrule_block_alias_getid($int);
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if ($id === false)
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unset($id);
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| 152 |
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$alias = array();
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| 154 |
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| 155 |
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if (isset($id) && $a_aliases[$id]) {
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/* Make sure this IP isn't already in the list. */
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| 157 |
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if (in_array($host.'/32', explode(" ", $a_aliases[$id]['address'])))
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return true;
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| 159 |
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/* Since the alias already exists, just add to it. */
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| 160 |
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$alias['name'] = $a_aliases[$id]['name'];
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| 161 |
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$alias['type'] = $a_aliases[$id]['type'];
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| 162 |
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$alias['descr'] = $a_aliases[$id]['descr'];
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| 163 |
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| 164 |
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$alias['address'] = $a_aliases[$id]['address'] . ' ' . $host . '/32';
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| 165 |
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$alias['detail'] = $a_aliases[$id]['detail'] . 'Entry added ' . date('r') . '||';
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| 166 |
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} else {
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| 167 |
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/* Create a new alias with all the proper information */
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| 168 |
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$alias['name'] = $blockaliasname . strtoupper($int);
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| 169 |
|
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$alias['type'] = 'network';
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| 170 |
d865241e
|
jim-p
|
$alias['descr'] = "Hosts blocked from Firewall Log view";
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| 171 |
c0b6fdde
|
jim-p
|
|
| 172 |
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$alias['address'] = $host . '/32';
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| 173 |
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$alias['detail'] = 'Entry added ' . date('r') . '||';
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| 174 |
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}
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| 175 |
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| 176 |
|
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/* Replace the old alias if needed, otherwise tack it on the end */
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| 177 |
|
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if (isset($id) && $a_aliases[$id])
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| 178 |
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$a_aliases[$id] = $alias;
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| 179 |
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else
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| 180 |
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$a_aliases[] = $alias;
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| 181 |
9bb8d542
|
Ermal Lu?i
|
|
| 182 |
|
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// Sort list
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| 183 |
|
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$a_aliases = msort($a_aliases, "name");
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| 184 |
c0b6fdde
|
jim-p
|
|
| 185 |
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return true;
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| 186 |
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}
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| 187 |
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|
| 188 |
|
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function easyrule_block_host_add($host, $int = 'wan') {
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| 189 |
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global $retval;
|
| 190 |
|
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/* Bail if the supplied host is not a valid IP address */
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| 191 |
|
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if (!is_ipaddr($host))
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| 192 |
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return false;
|
| 193 |
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|
| 194 |
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/* Flag whether or not we need to reload the filter */
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| 195 |
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$dirty = false;
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| 196 |
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| 197 |
|
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/* Attempt to add this host to the alias */
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| 198 |
|
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if (easyrule_block_alias_add($host, $int)) {
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| 199 |
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$dirty = true;
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| 200 |
|
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} else {
|
| 201 |
|
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/* Couldn't add the alias, or adding the host failed. */
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| 202 |
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return false;
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| 203 |
|
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}
|
| 204 |
|
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|
| 205 |
|
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/* Attempt to add the firewall rule if it doesn't exist.
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| 206 |
|
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* Failing to add the rule isn't necessarily an error, it may
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| 207 |
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* have been modified by the user in some way. Adding to the
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| 208 |
|
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* Alias is what's important.
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| 209 |
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*/
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| 210 |
|
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if (!easyrule_block_rule_exists($int)) {
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| 211 |
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if (easyrule_block_rule_create($int)) {
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| 212 |
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$dirty = true;
|
| 213 |
|
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} else {
|
| 214 |
|
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return false;
|
| 215 |
|
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}
|
| 216 |
|
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}
|
| 217 |
|
|
|
| 218 |
|
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/* If needed, write the config and reload the filter */
|
| 219 |
|
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if ($dirty) {
|
| 220 |
|
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write_config();
|
| 221 |
|
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$retval = filter_configure();
|
| 222 |
865ff9b4
|
jim-p
|
if (!empty($_SERVER['DOCUMENT_ROOT'])) {
|
| 223 |
|
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header("Location: firewall_aliases.php");
|
| 224 |
|
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exit;
|
| 225 |
|
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} else {
|
| 226 |
|
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return true;
|
| 227 |
|
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}
|
| 228 |
c0b6fdde
|
jim-p
|
} else {
|
| 229 |
|
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return false;
|
| 230 |
|
|
}
|
| 231 |
|
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}
|
| 232 |
|
|
|
| 233 |
|
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function easyrule_pass_rule_add($int, $proto, $srchost, $dsthost, $dstport) {
|
| 234 |
|
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global $config;
|
| 235 |
|
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|
| 236 |
|
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/* No rules, start a new array */
|
| 237 |
|
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if (!is_array($config['filter']['rule'])) {
|
| 238 |
|
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$config['filter']['rule'] = array();
|
| 239 |
|
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}
|
| 240 |
|
|
|
| 241 |
|
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filter_rules_sort();
|
| 242 |
|
|
$a_filter = &$config['filter']['rule'];
|
| 243 |
|
|
|
| 244 |
|
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/* Make up a new rule */
|
| 245 |
|
|
$filterent = array();
|
| 246 |
|
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$filterent['type'] = 'pass';
|
| 247 |
|
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$filterent['interface'] = $int;
|
| 248 |
|
|
$filterent['descr'] = "Easy Rule: Passed from Firewall Log View";
|
| 249 |
|
|
|
| 250 |
|
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if ($proto != "any")
|
| 251 |
|
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$filterent['protocol'] = $proto;
|
| 252 |
|
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else
|
| 253 |
|
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unset($filterent['protocol']);
|
| 254 |
|
|
|
| 255 |
|
|
/* Default to only allow echo requests, since that's what most people want and
|
| 256 |
|
|
* it should be a safe choice. */
|
| 257 |
|
|
if ($proto == "icmp")
|
| 258 |
|
|
$filterent['icmptype'] = 'echoreq';
|
| 259 |
|
|
|
| 260 |
|
|
pconfig_to_address($filterent['source'], $srchost, 32);
|
| 261 |
|
|
pconfig_to_address($filterent['destination'], $dsthost, 32, '', $dstport, $dstport);
|
| 262 |
|
|
|
| 263 |
|
|
$a_filter[] = $filterent;
|
| 264 |
|
|
|
| 265 |
998f77a8
|
jim-p
|
write_config($filterent['descr']);
|
| 266 |
c0b6fdde
|
jim-p
|
$retval = filter_configure();
|
| 267 |
865ff9b4
|
jim-p
|
if (!empty($_SERVER['DOCUMENT_ROOT'])) {
|
| 268 |
|
|
header("Location: firewall_rules.php?if={$int}");
|
| 269 |
|
|
exit;
|
| 270 |
|
|
} else {
|
| 271 |
|
|
return true;
|
| 272 |
|
|
}
|
| 273 |
|
|
}
|
| 274 |
|
|
|
| 275 |
|
|
function easyrule_parse_block($int, $src) {
|
| 276 |
|
|
if (!empty($src) && !empty($int)) {
|
| 277 |
|
|
if (!is_ipaddr($src)) {
|
| 278 |
|
|
return "Tried to block invalid IP: " . htmlspecialchars($src);
|
| 279 |
|
|
}
|
| 280 |
|
|
$int = easyrule_find_rule_interface($int);
|
| 281 |
|
|
if ($int === false) {
|
| 282 |
|
|
return "Invalid interface for block rule: " . htmlspecialchars($int);
|
| 283 |
|
|
}
|
| 284 |
|
|
if (easyrule_block_host_add($src, $int)) {
|
| 285 |
|
|
return "Host added successfully";
|
| 286 |
|
|
} else {
|
| 287 |
|
|
return "Failed to create block rule, alias, or add host.";
|
| 288 |
|
|
}
|
| 289 |
|
|
} else {
|
| 290 |
|
|
return "Tried to block but had no host IP or interface";
|
| 291 |
|
|
}
|
| 292 |
|
|
return "Unknown block error.";
|
| 293 |
|
|
}
|
| 294 |
|
|
function easyrule_parse_pass($int, $proto, $src, $dst, $dstport = 0) {
|
| 295 |
|
|
/* Check for valid int, srchost, dsthost, dstport, and proto */
|
| 296 |
|
|
global $protocols_with_ports;
|
| 297 |
|
|
|
| 298 |
|
|
if (!empty($int) && !empty($proto) && !empty($src) && !empty($dst)) {
|
| 299 |
|
|
$int = easyrule_find_rule_interface($int);
|
| 300 |
|
|
if ($int === false) {
|
| 301 |
|
|
return "Invalid interface for pass rule: " . htmlspecialchars($int);
|
| 302 |
|
|
}
|
| 303 |
|
|
if (getprotobyname($proto) == -1) {
|
| 304 |
|
|
return "Invalid protocol for pass rule: " . htmlspecialchars($proto);
|
| 305 |
|
|
}
|
| 306 |
|
|
if (!is_ipaddr($src)) {
|
| 307 |
|
|
return "Tried to pass invalid source IP: " . htmlspecialchars($src);
|
| 308 |
|
|
}
|
| 309 |
|
|
if (!is_ipaddr($dst)) {
|
| 310 |
|
|
return "Tried to pass invalid destination IP: " . htmlspecialchars($dst);
|
| 311 |
|
|
}
|
| 312 |
|
|
if (in_array($proto, $protocols_with_ports)) {
|
| 313 |
|
|
if (empty($dstport)) {
|
| 314 |
|
|
return "Missing destination port: " . htmlspecialchars($dstport);
|
| 315 |
|
|
}
|
| 316 |
|
|
if (!is_port($dstport)) {
|
| 317 |
|
|
return "Tried to pass invalid destination port: " . htmlspecialchars($dstport);
|
| 318 |
|
|
}
|
| 319 |
|
|
} else {
|
| 320 |
|
|
$dstport = 0;
|
| 321 |
|
|
}
|
| 322 |
|
|
/* Should have valid input... */
|
| 323 |
|
|
if (easyrule_pass_rule_add($int, $proto, $src, $dst, $dstport)) {
|
| 324 |
|
|
return "Successfully added pass rule!";
|
| 325 |
|
|
} else {
|
| 326 |
|
|
return "Failed to add pass rule.";
|
| 327 |
|
|
}
|
| 328 |
|
|
} else {
|
| 329 |
|
|
return "Missing parameters for pass rule.";
|
| 330 |
|
|
}
|
| 331 |
|
|
return "Unknown pass error.";
|
| 332 |
c0b6fdde
|
jim-p
|
}
|
| 333 |
9734b054
|
Scott Ullrich
|
|
| 334 |
|
|
?>
|