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5b237745
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Scott Ullrich
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<?php
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307cd525
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Bill Marquette
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/* $Id$ */
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5b237745
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Scott Ullrich
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/*
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util.inc
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part of m0n0wall (http://m0n0.ch/wall)
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98bbf05a
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Scott Ullrich
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5b237745
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Scott Ullrich
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Copyright (C) 2003-2004 Manuel Kasper <mk@neon1.net>.
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All rights reserved.
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98bbf05a
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Scott Ullrich
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5b237745
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Scott Ullrich
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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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98bbf05a
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Scott Ullrich
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5b237745
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Scott Ullrich
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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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98bbf05a
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Scott Ullrich
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5b237745
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Scott Ullrich
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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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98bbf05a
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Scott Ullrich
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5b237745
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Scott Ullrich
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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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/* kill a process by pid file */
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function killbypid($pidfile) {
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sigkillbypid($pidfile, "TERM");
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}
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/* sigkill a process by pid file */
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function sigkillbypid($pidfile, $sig) {
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if (file_exists($pidfile)) {
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mwexec("/bin/kill -s $sig `/bin/cat " . $pidfile . "`");
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}
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}
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/* kill a process by name */
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function killbyname($procname) {
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mwexec("/usr/bin/killall " . escapeshellarg($procname));
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}
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/* return the subnet address given a host address and a subnet bit count */
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function gen_subnet($ipaddr, $bits) {
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if (!is_ipaddr($ipaddr) || !is_numeric($bits))
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return "";
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98bbf05a
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Scott Ullrich
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5b237745
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Scott Ullrich
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return long2ip(ip2long($ipaddr) & gen_subnet_mask_long($bits));
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}
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/* return the highest (broadcast) address in the subnet given a host address and a subnet bit count */
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function gen_subnet_max($ipaddr, $bits) {
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if (!is_ipaddr($ipaddr) || !is_numeric($bits))
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return "";
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98bbf05a
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Scott Ullrich
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5b237745
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Scott Ullrich
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return long2ip(ip2long($ipaddr) | ~gen_subnet_mask_long($bits));
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}
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/* returns a subnet mask (long given a bit count) */
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function gen_subnet_mask_long($bits) {
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$sm = 0;
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for ($i = 0; $i < $bits; $i++) {
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$sm >>= 1;
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$sm |= 0x80000000;
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}
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return $sm;
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}
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/* same as above but returns a string */
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function gen_subnet_mask($bits) {
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return long2ip(gen_subnet_mask_long($bits));
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}
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function is_numericint($arg) {
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return (preg_match("/[^0-9]/", $arg) ? false : true);
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}
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/* returns true if $ipaddr is a valid dotted IPv4 address */
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function is_ipaddr($ipaddr) {
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if (!is_string($ipaddr))
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return false;
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98bbf05a
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Scott Ullrich
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5b237745
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Scott Ullrich
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$ip_long = ip2long($ipaddr);
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$ip_reverse = long2ip($ip_long);
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98bbf05a
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Scott Ullrich
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5b237745
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Scott Ullrich
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if ($ipaddr == $ip_reverse)
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return true;
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else
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return false;
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}
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/* returns true if $ipaddr is a valid dotted IPv4 address or an alias thereof */
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function is_ipaddroralias($ipaddr) {
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98bbf05a
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Scott Ullrich
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5b237745
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Scott Ullrich
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global $aliastable;
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98bbf05a
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Scott Ullrich
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5b237745
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Scott Ullrich
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if (isset($aliastable[$ipaddr]) && is_ipaddr($aliastable[$ipaddr]))
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return true;
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else
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return is_ipaddr($ipaddr);
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}
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/* returns true if $ipaddr is a valid dotted IPv4 address or any alias */
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function is_ipaddroranyalias($ipaddr) {
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Scott Ullrich
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5b237745
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Scott Ullrich
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global $aliastable;
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98bbf05a
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Scott Ullrich
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5b237745
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Scott Ullrich
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if (isset($aliastable[$ipaddr]))
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return true;
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else
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return is_ipaddr($ipaddr);
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}
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/* returns true if $subnet is a valid subnet in CIDR format */
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function is_subnet($subnet) {
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if (!is_string($subnet))
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return false;
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98bbf05a
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Scott Ullrich
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5b237745
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Scott Ullrich
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list($hp,$np) = explode('/', $subnet);
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98bbf05a
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Scott Ullrich
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5b237745
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if (!is_ipaddr($hp))
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return false;
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98bbf05a
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Scott Ullrich
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5b237745
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if (!is_numeric($np) || ($np < 1) || ($np > 32))
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return false;
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98bbf05a
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Scott Ullrich
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return true;
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}
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/* returns true if $subnet is a valid subnet in CIDR format or an alias thereof */
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function is_subnetoralias($subnet) {
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98bbf05a
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Scott Ullrich
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5b237745
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Scott Ullrich
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global $aliastable;
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98bbf05a
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Scott Ullrich
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5b237745
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Scott Ullrich
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if (isset($aliastable[$subnet]) && is_subnet($aliastable[$subnet]))
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return true;
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else
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return is_subnet($subnet);
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}
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/* returns true if $hostname is a valid hostname */
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function is_hostname($hostname) {
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if (!is_string($hostname))
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return false;
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98bbf05a
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Scott Ullrich
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5b237745
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Scott Ullrich
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if (preg_match("/^[a-z0-9\-]+$/i", $hostname))
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return true;
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else
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return false;
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}
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/* returns true if $domain is a valid domain name */
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function is_domain($domain) {
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if (!is_string($domain))
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return false;
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98bbf05a
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Scott Ullrich
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5b237745
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Scott Ullrich
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if (preg_match("/^([a-z0-9\-]+\.?)*$/i", $domain))
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return true;
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else
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return false;
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}
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/* returns true if $uname is a valid DynDNS username */
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function is_dyndns_username($uname) {
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if (!is_string($uname))
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return false;
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98bbf05a
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Scott Ullrich
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5b237745
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Scott Ullrich
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if (preg_match("/[^a-z0-9\-.@_]/i", $uname))
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return false;
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else
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return true;
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}
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/* returns true if $macaddr is a valid MAC address */
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function is_macaddr($macaddr) {
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if (!is_string($macaddr))
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return false;
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98bbf05a
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Scott Ullrich
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5b237745
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Scott Ullrich
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$maca = explode(":", $macaddr);
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if (count($maca) != 6)
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return false;
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98bbf05a
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Scott Ullrich
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| 189 |
5b237745
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Scott Ullrich
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foreach ($maca as $macel) {
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if (($macel === "") || (strlen($macel) > 2))
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return false;
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if (preg_match("/[^0-9a-f]/i", $macel))
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return false;
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}
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98bbf05a
|
Scott Ullrich
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5b237745
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Scott Ullrich
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return true;
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}
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/* returns true if $name is a valid name for an alias */
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function is_validaliasname($name) {
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if (!preg_match("/[^a-zA-Z0-9]/", $name))
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return true;
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else
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return false;
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}
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/* returns true if $port is a valid TCP/UDP port */
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function is_port($port) {
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if (!is_numericint($port))
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return false;
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98bbf05a
|
Scott Ullrich
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| 212 |
5b237745
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Scott Ullrich
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if (($port < 1) || ($port > 65535))
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return false;
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else
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return true;
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}
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| 218 |
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/* returns a list of interfaces with MAC addresses
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(skips VLAN and other virtual interfaces) */
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function get_interface_list() {
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98bbf05a
|
Scott Ullrich
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| 222 |
5b237745
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Scott Ullrich
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global $g;
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| 223 |
98bbf05a
|
Scott Ullrich
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| 224 |
5b237745
|
Scott Ullrich
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/* build interface list with netstat */
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| 225 |
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exec("/usr/bin/netstat -inW -f link", $linkinfo);
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| 226 |
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array_shift($linkinfo);
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| 227 |
98bbf05a
|
Scott Ullrich
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| 228 |
5b237745
|
Scott Ullrich
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$iflist = array();
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| 229 |
98bbf05a
|
Scott Ullrich
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| 230 |
5b237745
|
Scott Ullrich
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foreach ($linkinfo as $link) {
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| 231 |
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$alink = preg_split("/\s+/", $link);
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| 232 |
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$ifname = chop($alink[0]);
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| 233 |
98bbf05a
|
Scott Ullrich
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| 234 |
5b237745
|
Scott Ullrich
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if (substr($ifname, -1) == "*")
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| 235 |
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$ifname = substr($ifname, 0, strlen($ifname) - 1);
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| 236 |
98bbf05a
|
Scott Ullrich
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| 237 |
edb2ed90
|
Scott Ullrich
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if (!preg_match("/^(plip|pflog|ppp|sl|gif|faith|lo|ng|vlan)/", $ifname)) {
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| 238 |
5b237745
|
Scott Ullrich
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$iflist[$ifname] = array();
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| 239 |
98bbf05a
|
Scott Ullrich
|
|
| 240 |
5b237745
|
Scott Ullrich
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$iflist[$ifname]['mac'] = chop($alink[3]);
|
| 241 |
|
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$iflist[$ifname]['up'] = false;
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| 242 |
98bbf05a
|
Scott Ullrich
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| 243 |
5b237745
|
Scott Ullrich
|
/* find out if the link on this interface is up */
|
| 244 |
|
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unset($ifinfo);
|
| 245 |
|
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exec("/sbin/ifconfig {$ifname}", $ifinfo);
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| 246 |
98bbf05a
|
Scott Ullrich
|
|
| 247 |
5b237745
|
Scott Ullrich
|
foreach ($ifinfo as $ifil) {
|
| 248 |
|
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if (preg_match("/status: (.*)$/", $ifil, $matches)) {
|
| 249 |
|
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if ($matches[1] == "active")
|
| 250 |
|
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$iflist[$ifname]['up'] = true;
|
| 251 |
|
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break;
|
| 252 |
|
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}
|
| 253 |
|
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}
|
| 254 |
|
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}
|
| 255 |
|
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}
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| 256 |
98bbf05a
|
Scott Ullrich
|
|
| 257 |
5b237745
|
Scott Ullrich
|
return $iflist;
|
| 258 |
|
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}
|
| 259 |
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|
| 260 |
|
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/* wrapper for exec() */
|
| 261 |
|
|
function mwexec($command) {
|
| 262 |
|
|
|
| 263 |
|
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global $g;
|
| 264 |
98bbf05a
|
Scott Ullrich
|
|
| 265 |
5b237745
|
Scott Ullrich
|
if ($g['debug']) {
|
| 266 |
|
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if (!$_SERVER['REMOTE_ADDR'])
|
| 267 |
|
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echo "mwexec(): $command\n";
|
| 268 |
|
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passthru($command, $retval);
|
| 269 |
|
|
} else {
|
| 270 |
|
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exec("$command > /dev/null 2>&1", $oarr, $retval);
|
| 271 |
|
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}
|
| 272 |
98bbf05a
|
Scott Ullrich
|
|
| 273 |
|
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return $retval;
|
| 274 |
5b237745
|
Scott Ullrich
|
}
|
| 275 |
|
|
|
| 276 |
|
|
/* wrapper for exec() in background */
|
| 277 |
|
|
function mwexec_bg($command) {
|
| 278 |
|
|
|
| 279 |
|
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global $g;
|
| 280 |
98bbf05a
|
Scott Ullrich
|
|
| 281 |
5b237745
|
Scott Ullrich
|
if ($g['debug']) {
|
| 282 |
|
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if (!$_SERVER['REMOTE_ADDR'])
|
| 283 |
|
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echo "mwexec(): $command\n";
|
| 284 |
|
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}
|
| 285 |
98bbf05a
|
Scott Ullrich
|
|
| 286 |
5b237745
|
Scott Ullrich
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exec("nohup $command > /dev/null 2>&1 &");
|
| 287 |
|
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}
|
| 288 |
|
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|
| 289 |
|
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/* unlink a file, if it exists */
|
| 290 |
|
|
function unlink_if_exists($fn) {
|
| 291 |
336cb718
|
Scott Ullrich
|
$to_do = glob($fn);
|
| 292 |
3b378be5
|
Scott Ullrich
|
if(is_array($to_do)) {
|
| 293 |
336cb718
|
Scott Ullrich
|
foreach($to_do as $filename)
|
| 294 |
bc864536
|
Bill Marquette
|
if (file_exists($filename) && !is_dir($filename)) unlink($filename);
|
| 295 |
336cb718
|
Scott Ullrich
|
} else {
|
| 296 |
1a9a95f8
|
Scott Ullrich
|
if (file_exists($fn)) unlink($fn);
|
| 297 |
336cb718
|
Scott Ullrich
|
}
|
| 298 |
5b237745
|
Scott Ullrich
|
}
|
| 299 |
|
|
|
| 300 |
|
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/* make a global alias table (for faster lookups) */
|
| 301 |
|
|
function alias_make_table() {
|
| 302 |
98bbf05a
|
Scott Ullrich
|
|
| 303 |
5b237745
|
Scott Ullrich
|
global $config, $g, $aliastable;
|
| 304 |
98bbf05a
|
Scott Ullrich
|
|
| 305 |
5b237745
|
Scott Ullrich
|
$aliastable = array();
|
| 306 |
98bbf05a
|
Scott Ullrich
|
|
| 307 |
5b237745
|
Scott Ullrich
|
if (is_array($config['aliases']['alias'])) {
|
| 308 |
|
|
foreach ($config['aliases']['alias'] as $alias) {
|
| 309 |
|
|
if ($alias['name'])
|
| 310 |
|
|
$aliastable[$alias['name']] = $alias['address'];
|
| 311 |
|
|
}
|
| 312 |
|
|
}
|
| 313 |
|
|
}
|
| 314 |
|
|
|
| 315 |
|
|
/* check if an alias exists */
|
| 316 |
|
|
function is_alias($name) {
|
| 317 |
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| 318 |
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Scott Ullrich
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global $aliastable;
|
| 319 |
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| 320 |
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return isset($aliastable[$name]);
|
| 321 |
|
|
}
|
| 322 |
|
|
|
| 323 |
|
|
/* expand a host or network alias, if necessary */
|
| 324 |
|
|
function alias_expand($name) {
|
| 325 |
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| 326 |
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global $aliastable;
|
| 327 |
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| 328 |
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if (isset($aliastable[$name]))
|
| 329 |
|
|
return $aliastable[$name];
|
| 330 |
|
|
else if (is_ipaddr($name) || is_subnet($name))
|
| 331 |
|
|
return $name;
|
| 332 |
|
|
else
|
| 333 |
|
|
return null;
|
| 334 |
|
|
}
|
| 335 |
|
|
|
| 336 |
|
|
/* expand a host alias, if necessary */
|
| 337 |
|
|
function alias_expand_host($name) {
|
| 338 |
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Scott Ullrich
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|
| 339 |
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Scott Ullrich
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global $aliastable;
|
| 340 |
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Scott Ullrich
|
|
| 341 |
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Scott Ullrich
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if (isset($aliastable[$name]) && is_ipaddr($aliastable[$name]))
|
| 342 |
|
|
return $aliastable[$name];
|
| 343 |
|
|
else if (is_ipaddr($name))
|
| 344 |
|
|
return $name;
|
| 345 |
|
|
else
|
| 346 |
|
|
return null;
|
| 347 |
|
|
}
|
| 348 |
|
|
|
| 349 |
|
|
/* expand a network alias, if necessary */
|
| 350 |
|
|
function alias_expand_net($name) {
|
| 351 |
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|
| 352 |
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Scott Ullrich
|
global $aliastable;
|
| 353 |
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Scott Ullrich
|
|
| 354 |
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Scott Ullrich
|
if (isset($aliastable[$name]) && is_subnet($aliastable[$name]))
|
| 355 |
|
|
return $aliastable[$name];
|
| 356 |
|
|
else if (is_subnet($name))
|
| 357 |
|
|
return $name;
|
| 358 |
|
|
else
|
| 359 |
|
|
return null;
|
| 360 |
|
|
}
|
| 361 |
|
|
|
| 362 |
|
|
/* find out whether two subnets overlap */
|
| 363 |
|
|
function check_subnets_overlap($subnet1, $bits1, $subnet2, $bits2) {
|
| 364 |
|
|
|
| 365 |
|
|
if (!is_numeric($bits1))
|
| 366 |
|
|
$bits1 = 32;
|
| 367 |
|
|
if (!is_numeric($bits2))
|
| 368 |
|
|
$bits2 = 32;
|
| 369 |
|
|
|
| 370 |
|
|
if ($bits1 < $bits2)
|
| 371 |
|
|
$relbits = $bits1;
|
| 372 |
|
|
else
|
| 373 |
|
|
$relbits = $bits2;
|
| 374 |
98bbf05a
|
Scott Ullrich
|
|
| 375 |
5b237745
|
Scott Ullrich
|
$sn1 = gen_subnet_mask_long($relbits) & ip2long($subnet1);
|
| 376 |
|
|
$sn2 = gen_subnet_mask_long($relbits) & ip2long($subnet2);
|
| 377 |
98bbf05a
|
Scott Ullrich
|
|
| 378 |
5b237745
|
Scott Ullrich
|
if ($sn1 == $sn2)
|
| 379 |
|
|
return true;
|
| 380 |
|
|
else
|
| 381 |
|
|
return false;
|
| 382 |
|
|
}
|
| 383 |
|
|
|
| 384 |
|
|
/* compare two IP addresses */
|
| 385 |
|
|
function ipcmp($a, $b) {
|
| 386 |
|
|
if (ip2long($a) < ip2long($b))
|
| 387 |
|
|
return -1;
|
| 388 |
|
|
else if (ip2long($a) > ip2long($b))
|
| 389 |
|
|
return 1;
|
| 390 |
|
|
else
|
| 391 |
|
|
return 0;
|
| 392 |
|
|
}
|
| 393 |
|
|
|
| 394 |
|
|
/* return true if $addr is in $subnet, false if not */
|
| 395 |
|
|
function ip_in_subnet($addr,$subnet) {
|
| 396 |
|
|
list($ip, $mask) = explode('/', $subnet);
|
| 397 |
|
|
$mask = 0xffffffff << (32 - $mask);
|
| 398 |
|
|
return ((ip2long($addr) & $mask) == (ip2long($ip) & $mask));
|
| 399 |
|
|
}
|
| 400 |
|
|
|
| 401 |
|
|
/* verify (and remove) the digital signature on a file - returns 0 if OK */
|
| 402 |
|
|
function verify_digital_signature($fname) {
|
| 403 |
|
|
|
| 404 |
|
|
global $g;
|
| 405 |
|
|
|
| 406 |
|
|
return mwexec("/usr/local/bin/verifysig " .
|
| 407 |
|
|
escapeshellarg("{$g['etc_path']}/pubkey.pem") . " " .
|
| 408 |
|
|
escapeshellarg($fname));
|
| 409 |
|
|
}
|
| 410 |
|
|
|
| 411 |
|
|
/* obtain MAC address given an IP address by looking at the ARP table */
|
| 412 |
|
|
function arp_get_mac_by_ip($ip) {
|
| 413 |
08443c7a
|
Chris Dionissopoulos
|
mwexec("/sbin/ping -c 1 -t 1 {$ip}");
|
| 414 |
5b237745
|
Scott Ullrich
|
exec("/usr/sbin/arp -n {$ip}", $arpoutput);
|
| 415 |
98bbf05a
|
Scott Ullrich
|
|
| 416 |
5b237745
|
Scott Ullrich
|
if ($arpoutput[0]) {
|
| 417 |
|
|
$arpi = explode(" ", $arpoutput[0]);
|
| 418 |
|
|
$macaddr = $arpi[3];
|
| 419 |
|
|
if (is_macaddr($macaddr))
|
| 420 |
|
|
return $macaddr;
|
| 421 |
|
|
else
|
| 422 |
|
|
return false;
|
| 423 |
|
|
}
|
| 424 |
98bbf05a
|
Scott Ullrich
|
|
| 425 |
5b237745
|
Scott Ullrich
|
return false;
|
| 426 |
|
|
}
|
| 427 |
|
|
|
| 428 |
98bbf05a
|
Scott Ullrich
|
/* return a fieldname that is safe for xml usage */
|
| 429 |
|
|
function xml_safe_fieldname($fieldname) {
|
| 430 |
|
|
$fieldname = str_replace("/","",$fieldname);
|
| 431 |
|
|
$fieldname = str_replace("-","",$fieldname);
|
| 432 |
|
|
$fieldname = str_replace(" ","",$fieldname);
|
| 433 |
|
|
$fieldname = str_replace("!","",$fieldname);
|
| 434 |
|
|
$fieldname = str_replace("@","",$fieldname);
|
| 435 |
|
|
$fieldname = str_replace("#","",$fieldname);
|
| 436 |
|
|
$fieldname = str_replace("$","",$fieldname);
|
| 437 |
|
|
$fieldname = str_replace("%","",$fieldname);
|
| 438 |
|
|
$fieldname = str_replace("^","",$fieldname);
|
| 439 |
|
|
$fieldname = str_replace("&","",$fieldname);
|
| 440 |
|
|
$fieldname = str_replace("*","",$fieldname);
|
| 441 |
|
|
$fieldname = str_replace("(","",$fieldname);
|
| 442 |
|
|
$fieldname = str_replace(")","",$fieldname);
|
| 443 |
|
|
$fieldname = str_replace("_","",$fieldname);
|
| 444 |
|
|
$fieldname = str_replace("+","",$fieldname);
|
| 445 |
|
|
$fieldname = str_replace("=","",$fieldname);
|
| 446 |
|
|
$fieldname = str_replace("{","",$fieldname);
|
| 447 |
|
|
$fieldname = str_replace("}","",$fieldname);
|
| 448 |
|
|
$fieldname = str_replace("[","",$fieldname);
|
| 449 |
|
|
$fieldname = str_replace("]","",$fieldname);
|
| 450 |
|
|
$fieldname = str_replace("|","",$fieldname);
|
| 451 |
|
|
$fieldname = str_replace("\\","",$fieldname);
|
| 452 |
|
|
$fieldname = str_replace("/","",$fieldname);
|
| 453 |
|
|
$fieldname = str_replace("<","",$fieldname);
|
| 454 |
|
|
$fieldname = str_replace(">","",$fieldname);
|
| 455 |
|
|
$fieldname = str_replace("?","",$fieldname);
|
| 456 |
|
|
$fieldname = str_replace(":","",$fieldname);
|
| 457 |
|
|
$fieldname = str_replace(",","",$fieldname);
|
| 458 |
|
|
$fieldname = str_replace(".","",$fieldname);
|
| 459 |
|
|
$fieldname = str_replace("'","",$fieldname);
|
| 460 |
|
|
$fieldname = str_replace("\"","",$fieldname);
|
| 461 |
|
|
$fieldname = strtolower($fieldname);
|
| 462 |
|
|
return $fieldname;
|
| 463 |
|
|
}
|
| 464 |
|
|
|
| 465 |
5b237745
|
Scott Ullrich
|
?>
|