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util.inc
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<?php
/*
* Copyright (C) 2014-2023 Franco Fichtner <franco@opnsense.org>
* Copyright (C) 2010 Ermal Luçi
* Copyright (C) 2005-2006 Colin Smith <ethethlay@gmail.com>
* Copyright (C) 2004-2007 Scott Ullrich <sullrich@gmail.com>
* 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.
*/
require_once 'IPv6.inc';
/* XXX only two callers left, better remove this unreliable function */
function killbyname($procname, $sig = 'TERM', $waitforit = true)
{
/* pgrep -n only kills the newest matching process */
_killbypid(shell_safe('/bin/pgrep -anx %s', $procname), $sig, $waitforit, "name:$procname");
}
function killbypid($pid_or_file, $sig = 'TERM', $waitforit = true)
{
$pid = $pid_or_file;
if (strpos($pid_or_file, '/') !== false) {
$pid = trim(@file_get_contents($pid_or_file) ?? '');
}
_killbypid($pid, $sig, $waitforit, "pid:$pid_or_file");
}
function _killbypid($pid, $sig, $waitforit, $caller)
{
if (!is_numeric($pid) || $pid <= 1) {
return;
}
mwexecf('/bin/kill -%s %s', [$sig, $pid], $caller);
if (!$waitforit || $sig == 'HUP') {
return;
}
while (mwexecf('/bin/kill -0 %s', $pid, true) == 0) {
usleep(200 * 1000);
}
}
function isvalidpid($pidfile)
{
if (file_exists($pidfile)) {
return mwexecf('/bin/pgrep -nF %s', $pidfile, true) == 0;
}
return false;
}
function waitforpid($pidfile, $timeout = -1)
{
$msec = $timeout * 1000;
while (!isvalidpid($pidfile)) {
usleep(200 * 1000);
if ($timeout != -1) {
$msec -= 200;
if ($msec < 0) {
return 0;
}
}
}
return trim(file_get_contents($pidfile));
}
function is_process_running($process)
{
exec('/bin/pgrep -anx ' . escapeshellarg($process), $output, $retval);
return (intval($retval) == 0);
}
function service_by_filter($filter = [])
{
return service_by_name('*', $filter);
}
function service_by_name($name, $filter = [])
{
$services = plugins_services();
foreach ($services as $service) {
/* skip unless filter wildcard is set */
if ($name != '*' && $service['name'] != $name) {
continue;
}
if (!count($filter)) {
/* force (mis)match if filter is empty (standard behaviour) */
$filter['name'] = $name;
}
foreach ($filter as $key => $value) {
if (
isset($service[$key]) && ($service[$key] == $value ||
(is_array($service[$key]) && in_array($value, $service[$key])))
) {
return $service;
}
}
}
return [];
}
function service_status($service)
{
if (!empty($service['nocheck'])) {
return true;
}
if (isset($service['pidfile'])) {
return isvalidpid($service['pidfile']);
}
return is_process_running($service['name']);
}
function service_message($service)
{
/*
* Emulate the following messages from rc system:
*
* syslog_ng is running as pid 11645.
* syslog_ng is not running.
*/
$pid = '';
$status = false;
if (!empty($service['nocheck'])) {
/* do not expose pid / may not exist */
$status = true;
} elseif (isset($service['pidfile'])) {
$status = isvalidpid($service['pidfile']);
if ($status) {
/* could be wrong pid but best effort only */
$pid = ' as pid ' . trim(@file_get_contents($service['pidfile']) ?? '');
}
} else {
$status = is_process_running($service['name']);
if ($status) {
/* could be wrong pid but best effort only */
$pid = ' as pid ' . shell_safe('/bin/pgrep -anx %s', $service['name']);
}
}
return sprintf('%s is %s.', service_name($service), $status ? 'running' . $pid : 'not running');
}
function service_name($service)
{
return $service['name'] . (array_key_exists('id', $service) ? "[{$service['id']}]" : '');
}
function service_control_get($name, $extras)
{
$filter = [];
if (array_key_exists('id', $extras) && $extras['id'] !== '') {
$filter['id'] = $extras['id'];
}
$service = service_by_name($name, $filter);
if (empty($service)) {
$name .= isset($filter['id']) ? "[{$filter['id']}]" : '';
return sprintf(gettext("Could not find unknown service `%s'"), htmlspecialchars($name));
}
return $service;
}
function service_control_start($name, $extras)
{
$service = service_control_get($name, $extras);
if (!is_array($service)) {
return $service;
}
if (isset($service['configd']['start'])) {
foreach ($service['configd']['start'] as $cmd) {
configd_run($cmd);
}
} elseif (isset($service['php']['start'])) {
foreach ($service['php']['start'] as $cmd) {
$params = [];
if (isset($service['php']['args'])) {
foreach ($service['php']['args'] as $param) {
$params[] = $service[$param];
}
}
call_user_func_array($cmd, $params);
}
} elseif (isset($service['mwexec']['start'])) {
foreach ($service['mwexec']['start'] as $cmd) {
mwexec($cmd);
}
} else {
return sprintf(gettext("Could not start service `%s'"), htmlspecialchars(service_name($service)));
}
return sprintf(gettext("Service `%s' has been started."), htmlspecialchars(service_name($service)));
}
function service_control_stop($name, $extras)
{
$service = service_control_get($name, $extras);
if (!is_array($service)) {
return $service;
}
if (isset($service['configd']['stop'])) {
foreach ($service['configd']['stop'] as $cmd) {
configd_run($cmd);
}
} elseif (isset($service['php']['stop'])) {
foreach ($service['php']['stop'] as $cmd) {
$cmd();
}
} elseif (isset($service['mwexec']['stop'])) {
foreach ($service['mwexec']['stop'] as $cmd) {
mwexec($cmd);
}
} elseif (isset($service['pidfile'])) {
killbypid($service['pidfile']);
} else {
/* last resort, but not very elegant */
killbyname($service['name']);
}
return sprintf(gettext("Service `%s' has been stopped."), htmlspecialchars(service_name($service)));
}
function service_control_restart($name, $extras)
{
$service = service_control_get($name, $extras);
if (!is_array($service)) {
return $service;
}
if (isset($service['configd']['restart'])) {
foreach ($service['configd']['restart'] as $cmd) {
configd_run($cmd);
}
} elseif (isset($service['php']['restart'])) {
foreach ($service['php']['restart'] as $cmd) {
$params = [];
if (isset($service['php']['args'])) {
foreach ($service['php']['args'] as $param) {
$params[] = $service[$param];
}
}
call_user_func_array($cmd, $params);
}
} elseif (isset($service['mwexec']['restart'])) {
foreach ($service['mwexec']['restart'] as $cmd) {
mwexec($cmd);
}
} else {
return sprintf(gettext("Could not restart service `%s'"), htmlspecialchars(service_name($service)));
}
return sprintf(gettext("Service `%s' has been restarted."), htmlspecialchars(service_name($service)));
}
function is_subsystem_dirty($subsystem = '')
{
return file_exists("/tmp/{$subsystem}.dirty");
}
function mark_subsystem_dirty($subsystem = '')
{
touch("/tmp/{$subsystem}.dirty");
}
function clear_subsystem_dirty($subsystem = '')
{
@unlink("/tmp/{$subsystem}.dirty");
}
function exit_on_bootup($callback = null, $arguments = [])
{
if (product::getInstance()->booting()) {
if ($callback) {
call_user_func_array($callback, $arguments);
}
/* intentionally we exit here to avoid future cleverness WRT bootup handling */
exit(0);
}
}
/**
* service logger with additional boot-time performance logging
* @param $message string message to log
* @param $verbose boolean verbose|bool (send to console),
* @return void
*/
function service_log(string $message, bool $verbose = true): void
{
if ($verbose) {
echo $message;
flush();
}
if (product::getInstance()->booting()) {
$bt = debug_backtrace();
$caller = !empty($bt[1]['function']) ? $bt[1]['function'] : 'unknown';
file_put_contents('/var/log/boot.log', implode(' ', [
(new DateTime())->format('c'),
$caller . '[' . getmypid() . ']',
rtrim($message) . PHP_EOL
]), FILE_APPEND | LOCK_EX);
}
}
/* validate non-negative numeric string, or equivalent numeric variable */
function is_numericint($arg)
{
return (((is_int($arg) && $arg >= 0) || (is_string($arg) && strlen($arg) > 0 && ctype_digit($arg))) ? true : false);
}
/* return the subnet address given a host address and a subnet bit count */
function gen_subnet($ipaddr, $bits)
{
if (!is_ipaddr($ipaddr) || !is_numeric($bits)) {
return '';
}
return long2ip(ip2long($ipaddr) & gen_subnet_mask_long($bits));
}
/* return the subnet address given a host address and a subnet bit count */
function gen_subnetv6($ipaddr, $bits)
{
if (!is_ipaddrv6($ipaddr) || !is_numeric($bits)) {
return '';
}
$address = Net_IPv6::getNetmask($ipaddr, $bits);
$address = Net_IPv6::compress($address);
return $address;
}
/* return the highest (broadcast) address in the subnet given a host address and a subnet bit count */
function gen_subnet_max($ipaddr, $bits)
{
if (!is_ipaddr($ipaddr) || !is_numeric($bits)) {
return '';
}
return long2ip32(ip2long($ipaddr) | ~gen_subnet_mask_long($bits));
}
/* Generate end number for a given ipv6 subnet mask */
function gen_subnetv6_max($ipaddr, $bits)
{
$result = false;
if (!is_ipaddrv6($ipaddr)) {
return false;
}
set_error_handler(
function () {
return;
}
);
$mask = Net_IPv6::getNetmask('FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF', $bits);
$inet_ip = (binary)inet_pton($ipaddr);
if ($inet_ip) {
$inet_mask = (binary)inet_pton($mask);
if ($inet_mask) {
$inet_end = $inet_ip | ~$inet_mask;
$result = inet_ntop($inet_end);
}
}
restore_error_handler();
return $result;
}
/* returns the calculated bit length of the prefix delegation from a WAN interface */
function calculate_ipv6_delegation_length($if)
{
global $config;
$pdlen = -1;
if (!isset($config['interfaces'][$if]['ipaddrv6'])) {
return $pdlen;
}
switch ($config['interfaces'][$if]['ipaddrv6']) {
case '6to4':
$pdlen = 16;
break;
case '6rd':
$rd6cfg = $config['interfaces'][$if];
$rd6plen = explode('/', $rd6cfg['prefix-6rd']);
$pdlen = 64 - ($rd6plen[1] + (32 - $rd6cfg['prefix-6rd-v4plen']));
if ($pdlen == 0) {
/* XXX bug reports this is not working, needs investigation */
$pdlen = -1;
}
break;
case 'dhcp6':
$dhcp6cfg = $config['interfaces'][$if];
if (!empty($dhcp6cfg['adv_dhcp6_config_file_override'])) {
/* emit error since we cannot cope with custom config */
$pdlen = -1;
} elseif (!empty($dhcp6cfg['adv_dhcp6_config_advanced']) && is_numeric($dhcp6cfg['adv_dhcp6_prefix_interface_statement_sla_len'])) {
$pdlen = $dhcp6cfg['adv_dhcp6_prefix_interface_statement_sla_len'];
} elseif (is_numeric($dhcp6cfg['dhcp6-ia-pd-len'])) {
$pdlen = $dhcp6cfg['dhcp6-ia-pd-len'];
}
break;
default:
break;
}
return $pdlen;
}
/* returns a subnet mask (long given a bit count) */
function gen_subnet_mask_long($bits)
{
$sm = 0;
for ($i = 0; $i < $bits; $i++) {
$sm >>= 1;
$sm |= 0x80000000;
}
return $sm;
}
/* same as above but returns a string */
function gen_subnet_mask($bits)
{
return long2ip(gen_subnet_mask_long($bits));
}
/* Convert long int to IP address, truncating to 32-bits. */
function long2ip32($ip)
{
return long2ip($ip & 0xFFFFFFFF);
}
/* Convert IP address to long int, truncated to 32-bits to avoid sign extension on 64-bit platforms. */
function ip2long32($ip)
{
return ( ip2long($ip) & 0xFFFFFFFF );
}
/* Convert IP address to unsigned long int. */
function ip2ulong($ip)
{
return sprintf("%u", ip2long32($ip));
}
/* Find the smallest possible subnet mask for given IP range */
function find_smallest_cidr($ips, $family = 'inet')
{
return $family == 'inet6' ?
find_smallest_cidr6($ips) :
find_smallest_cidr4($ips);
}
/* Find the smallest possible subnet mask for given IPv4 range */
function find_smallest_cidr4($ips)
{
foreach ($ips as $id => $ip) {
$ips[$id] = ip2long($ip);
}
for ($bits = 0; $bits <= 32; $bits += 1) {
$mask = (0xffffffff << $bits) & 0xffffffff;
$test = [];
foreach ($ips as $ip) {
$test[$ip & $mask] = true;
}
if (count($test) == 1) {
/* one element means CIDR size matches all */
break;
}
}
return 32 - $bits;
}
/* Find the smallest possible subnet mask for given IPv6 range */
function find_smallest_cidr6($ips)
{
foreach ($ips as $id => $ip) {
$ips[$id] = unpack('N*', inet_pton($ip));
}
for ($bits = 0; $bits <= 128; $bits += 1) {
$mask1 = (0xffffffff << max($bits - 96, 0)) & 0xffffffff;
$mask2 = (0xffffffff << max($bits - 64, 0)) & 0xffffffff;
$mask3 = (0xffffffff << max($bits - 32, 0)) & 0xffffffff;
$mask4 = (0xffffffff << $bits) & 0xffffffff;
$test = [];
foreach ($ips as $ip) {
$test[sprintf('%032b%032b%032b%032b', $ip[1] & $mask1, $ip[2] & $mask2, $ip[3] & $mask3, $ip[4] & $mask4)] = true;
}
if (count($test) == 1) {
/* one element means CIDR size matches all */
break;
}
}
return 128 - $bits;
}
/* merge IPv6 address prefix of default size 64 with suffix */
function merge_ipv6_address($prefix, $suffix, $size = 64)
{
if (strpos($suffix, '::') !== 0) {
/* do not override full addresses */
return $suffix;
}
$size = 128 - $size;
$prefix_bits = unpack('N*', inet_pton($prefix));
$suffix_bits = unpack('N*', inet_pton($suffix));
$mask = [
1 => (0xffffffff << max($size - 96, 0)) & 0xffffffff,
2 => (0xffffffff << max($size - 64, 0)) & 0xffffffff,
3 => (0xffffffff << max($size - 32, 0)) & 0xffffffff,
4 => (0xffffffff << $size) & 0xffffffff,
];
$result = '';
for ($pos = 1; $pos <= 4; $pos += 1) {
$result .= sprintf('%08x', ($prefix_bits[$pos] & $mask[$pos]) | ($suffix_bits[$pos] & (~$mask[$pos] & 0xffffffff)));
}
return Net_IPv6::compress(implode(':', str_split($result, 4)));
}
/* returns true if $ipaddr is a valid dotted IPv4 address or an IPv6 */
function is_ipaddr($ipaddr)
{
if (is_ipaddrv4($ipaddr)) {
return true;
}
if (is_ipaddrv6($ipaddr)) {
return true;
}
return false;
}
/* returns true if $ipaddr is a valid IPv6 address */
function is_ipaddrv6($ipaddr)
{
if (!is_string($ipaddr) || empty($ipaddr)) {
return false;
}
if (strstr($ipaddr, "%") && is_linklocal($ipaddr)) {
$tmpip = explode("%", $ipaddr);
$ipaddr = $tmpip[0];
}
if (strpos($ipaddr, ":") === false) {
return false;
} elseif (strpos($ipaddr, "/") !== false) {
return false; // subnet is not an address
} else {
return Net_IPv6::checkIPv6($ipaddr);
}
}
/* returns true if $ipaddr is a valid dotted IPv4 address */
function is_ipaddrv4($ipaddr)
{
if (!is_string($ipaddr) || empty($ipaddr)) {
return false;
}
$ip_long = ip2long($ipaddr);
$ip_reverse = long2ip32($ip_long);
if ($ipaddr == $ip_reverse) {
return true;
} else {
return false;
}
}
/* returns true if $ipaddr is a valid linklocal address (inside fe80::/10) */
function is_linklocal($ipaddr)
{
return !!preg_match('/^fe[89ab][0-9a-f]:/i', $ipaddr ?? '');
}
/* returns true if $ipaddr is a valid uniquelocal address (inside fd00::/8) */
function is_uniquelocal($ipaddr)
{
return !!preg_match('/^fd[0-9a-f][0-9a-f]:/i', $ipaddr ?? '');
}
/* returns true if $ipaddr is a valid literal IPv6 address */
function is_literalipaddrv6($ipaddr)
{
if (preg_match('/\[([0-9a-f:]+)\]/i', $ipaddr, $match)) {
$ipaddr = $match[1];
} else {
return false;
}
return is_ipaddrv6($ipaddr);
}
function is_ipaddrwithport($ipport)
{
$parts = explode(":", $ipport);
$port = array_pop($parts);
if (count($parts) == 1) {
return is_ipaddrv4($parts[0]) && is_port($port);
} elseif (count($parts) > 1) {
return is_literalipaddrv6(implode(":", $parts)) && is_port($port);
} else {
return false;
}
}
function is_hostnamewithport($hostport)
{
$parts = explode(":", $hostport);
$port = array_pop($parts);
if (count($parts) == 1) {
return is_hostname($parts[0]) && is_port($port);
} else {
return false;
}
}
/* returns true if $ipaddr is a valid dotted IPv4 address or an alias thereof */
function is_ipaddroralias($ipaddr)
{
if (is_alias($ipaddr)) {
foreach ((new \OPNsense\Firewall\Alias())->aliasIterator() as $alias) {
if ($alias['name'] == $ipaddr && !preg_match("/port/i", $alias['type'])) {
return true;
}
}
return false;
}
return is_ipaddr($ipaddr);
}
/* returns true if $subnet is a valid IPv4 or IPv6 subnet in CIDR format
false - if not a valid subnet
true (numeric 4 or 6) - if valid, gives type of subnet */
function is_subnet($subnet)
{
if (is_string($subnet) && preg_match('/^(?:([0-9.]{7,15})|([0-9a-f:]{2,39}))\/(\d{1,3})$/i', $subnet, $parts)) {
if (is_ipaddrv4($parts[1]) && $parts[3] <= 32) {
return 4;
}
if (is_ipaddrv6($parts[2]) && $parts[3] <= 128) {
return 6;
}
}
return false;
}
/* same as is_subnet() but accepts IPv4 only */
function is_subnetv4($subnet)
{
return (is_subnet($subnet) == 4);
}
/* same as is_subnet() but accepts IPv6 only */
function is_subnetv6($subnet)
{
return (is_subnet($subnet) == 6);
}
/* returns true if $hostname is a valid hostname */
function is_hostname($hostname)
{
if (!is_string($hostname)) {
return false;
}
if (preg_match('/^(?:(?:[a-z0-9_]|[a-z0-9_][a-z0-9_\-]*[a-z0-9_])\.)*(?:[a-z0-9_]|[a-z0-9_][a-z0-9_\-]*[a-z0-9_])$/i', $hostname)) {
return true;
} else {
return false;
}
}
/* returns true if $domain is a valid domain name */
function is_domain($domain, $allow_root = false)
{
if (!is_string($domain)) {
return false;
} elseif (preg_match('/^(?:(?:[a-z0-9]|[a-z0-9][a-z0-9\-]*[a-z0-9])\.)*(?:[a-z0-9]|[a-z0-9][a-z0-9\-]*[a-z0-9])$/i', $domain)) {
return true;
} elseif ($allow_root && $domain == '.') {
return true;
}
return false;
}
/* returns true if $macaddr is a valid MAC address */
function is_macaddr($macaddr, $partial = false)
{
return !!preg_match('/^[0-9A-F]{2}(?:[:][0-9A-F]{2}){' . ($partial ? '1,' : '') . '5}$/i', $macaddr);
}
/* returns true if $port is a valid TCP/UDP port */
function is_port($port)
{
return OPNsense\Firewall\Util::isPort($port, false);
}
/* returns true if $portrange is a valid TCP/UDP portrange ("<port>:<port>") */
function is_portrange($portrange)
{
$ports = explode(":", $portrange);
return (count($ports) == 2 && is_port($ports[0]) && is_port($ports[1]));
}
/* returns true if $port is a valid port number or an alias thereof */
function is_portoralias($port)
{
if (is_alias($port)) {
foreach ((new \OPNsense\Firewall\Alias())->aliasIterator() as $alias) {
if ($alias['name'] == $port && preg_match("/port/i", $alias['type'])) {
return true;
}
}
return false;
}
return is_port($port);
}
/* returns true if $test is in the range between $start and $end */
function is_inrange_v4($test, $start, $end)
{
if ((ip2ulong($test) <= ip2ulong($end)) && (ip2ulong($test) >= ip2ulong($start))) {
return true;
} else {
return false;
}
}
/* returns true if $test is in the range between $start and $end */
function is_inrange_v6($test, $start, $end)
{
if ((inet_pton($test) <= inet_pton($end)) && (inet_pton($test) >= inet_pton($start))) {
return true;
} else {
return false;
}
}
/* returns true if $test is in the range between $start and $end */
function is_inrange($test, $start, $end)
{
return is_ipaddrv6($test) ? is_inrange_v6($test, $start, $end) : is_inrange_v4($test, $start, $end);
}
function get_configured_carp_interface_list()
{
$carp_list = [];
foreach (config_read_array('virtualip', 'vip') as $vip) {
if ($vip['mode'] == 'carp') {
$carp_list["{$vip['interface']}_vip{$vip['vhid']}"] = $vip['subnet'];
}
}
return $carp_list;
}
function get_configured_ip_aliases_list()
{
$alias_list = [];
foreach (config_read_array('virtualip', 'vip') as $vip) {
if ($vip['mode'] == 'ipalias') {
$alias_list[$vip['subnet']] = $vip['interface'];
}
}
return $alias_list;
}
function get_configured_interface_with_descr()
{
$iflist = [];
foreach (legacy_config_get_interfaces(['virtual' => false]) as $if => $ifdetail) {
if (isset($ifdetail['enable'])) {
$iflist[$if] = $ifdetail['descr'];
}
}
return $iflist;
}
function get_primary_interface_from_list($iflist = null)
{
$ret = null;
if ($iflist === null) {
$iflist = array_keys(get_configured_interface_with_descr());
}
/* we pull the primary entry from a "priority" list: lan, optX or wan */
natsort($iflist);
foreach ($iflist as $if) {
if (preg_match('/^(lan|opt[0-9]+|wan)$/', $if)) {
$ret = $if;
break;
}
}
return $ret;
}
/*
* get_configured_ip_addresses() - Return a list of all configured
* interfaces IP Addresses (ipv4+ipv6)
*/
function get_configured_ip_addresses()
{
$ip_array = [];
foreach (legacy_interfaces_details() as $ifname => $if) {
foreach (['ipv4', 'ipv6'] as $iptype) {
if (!empty($if[$iptype])) {
foreach ($if[$iptype] as $addr) {
if (!empty($addr['ipaddr'])) {
$scope = !empty($addr['link-local']) ? "%{$ifname}" : '';
$ip_array[$addr['ipaddr'] . $scope] = $ifname;
}
}
}
}
}
return $ip_array;
}
/****f* util/log_error
* NAME
* log_error - Sends a string to syslog with LOG_ERR severity.
* INPUTS
* $error - string containing the syslog message.
* RESULT
* null
******/
function log_error($error)
{
log_msg($error, LOG_ERR);
}
/****f* util/log_msg
* NAME
* log_msg - Sends a string to syslog with the required severity level.
* INPUTS
* $msg - string containing the syslog message.
* $prio - syslog severity level.
* RESULT
* null
******/
function log_msg($msg, $prio = LOG_NOTICE)
{
$page = $_SERVER['SCRIPT_NAME'];
if (empty($page)) {
$files = get_included_files();
$page = basename($files[0]);
}
switch ($prio) {
case LOG_DEBUG:
case LOG_INFO:
/* lowest handled value for the time being */
$prio = LOG_NOTICE;
break;
default:
break;
}
syslog($prio, "$page: $msg");
}
function url_safe($format, $args = [])
{
if (!is_array($args)) {
/* just in case there's only one argument */
$args = [$args];
}
foreach ($args as $id => $arg) {
/* arguments could be empty, so force default */
$args[$id] = !empty($arg) ? urlencode($arg) : '';
}
return vsprintf($format, $args);
}
function mwexec($command, $mute = false)
{
$oarr = [];
$retval = 0;
$garbage = exec("{$command} 2>&1", $oarr, $retval);
unset($garbage);
if ($retval != 0 && $mute !== true) {
$output = implode(' ', $oarr);
log_msg(sprintf("The command '%s'%s returned exit code '%d', the output was '%s'", $command, !empty($mute) ? "($mute) " : '', $retval, $output), LOG_ERR);
unset($output);
}
unset($oarr);
return $retval;
}
function mwexec_bg($command, $mute = false)
{
mwexec("/usr/sbin/daemon -f {$command}", $mute);
}
function exec_safe($format, $args = [])
{
if (!is_array($args)) {
/* just in case there's only one argument */
$args = [$args];
}
foreach ($args as $id => $arg) {
$args[$id] = escapeshellarg($arg ?? '');
}
return vsprintf($format, $args);
}
function mwexecf($format, $args = [], $mute = false)
{
return mwexec(exec_safe($format, $args), $mute);
}
function mwexecf_bg($format, $args = [], $mute = false)
{
mwexec_bg(exec_safe($format, $args), $mute);
}
function shell_safe($format, $args = [])
{
$ret = shell_exec(exec_safe($format, $args));
/* shell_exec() has weird semantics */
if ($ret === false || $ret === null) {
$ret = '';
}
/* always trim() result on a string */
return trim($ret);
}
/* check if an alias exists */
function is_alias($name)