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dhcpd.inc
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<?php
/*
* Copyright (C) 2014-2024 Franco Fichtner <franco@opnsense.org>
* Copyright (C) 2010 Ermal Luçi
* Copyright (C) 2005-2006 Colin Smith <ethethlay@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.
*/
function dhcpd_configure()
{
return [
'dhcp' => ['dhcpd_dhcp_configure:3'],
'local' => ['dhcpd_dhcp_configure'],
];
}
function dhcpd_run()
{
return [
'static_mapping' => 'dhcpd_staticmap',
];
}
function dhcpd_radvd_enabled()
{
global $config;
/* handle manually configured DHCP6 server settings first */
foreach (config_read_array('dhcpdv6') as $dhcpv6if => $dhcpv6ifconf) {
if (isset($config['interfaces'][$dhcpv6if]['enable']) && isset($dhcpv6ifconf['ramode']) && $dhcpv6ifconf['ramode'] != 'disabled') {
return true;
}
}
/* handle DHCP-PD prefixes and 6RD dynamic interfaces */
foreach (legacy_config_get_interfaces(array('virtual' => false)) as $ifcfg) {
if (isset($ifcfg['enable']) && !empty($ifcfg['track6-interface']) && !isset($ifcfg['dhcpd6track6allowoverride'])) {
return true;
}
}
return false;
}
function dhcpd_dhcpv6_enabled()
{
global $config;
/* handle manually configured DHCP6 server settings first */
foreach (config_read_array('dhcpdv6') as $dhcpv6if => $dhcpv6ifconf) {
if (isset($config['interfaces'][$dhcpv6if]['enable']) && isset($dhcpv6ifconf['enable'])) {
return true;
}
}
/* handle DHCP-PD prefixes and 6RD dynamic interfaces */
foreach (legacy_config_get_interfaces(array('virtual' => false)) as $ifcfg) {
if (isset($ifcfg['enable']) && !empty($ifcfg['track6-interface']) && !isset($ifcfg['dhcpd6track6allowoverride'])) {
return true;
}
}
return false;
}
function dhcpd_dhcpv4_enabled()
{
global $config;
foreach (config_read_array('dhcpd') as $dhcpif => $dhcpifconf) {
if (isset($dhcpifconf['enable']) && !empty($config['interfaces'][$dhcpif])) {
return true;
}
}
return false;
}
function dhcpd_services()
{
global $config;
$services = array();
if (dhcpd_radvd_enabled()) {
$pconfig = array();
$pconfig['name'] = "radvd";
$pconfig['description'] = gettext("Router Advertisement Daemon");
$pconfig['php']['restart'] = array('dhcpd_radvd_configure');
$pconfig['php']['start'] = array('dhcpd_radvd_configure');
$pconfig['pidfile'] = '/var/run/radvd.pid';
$services[] = $pconfig;
}
if (dhcpd_dhcpv4_enabled()) {
$pconfig = array();
$pconfig['name'] = 'dhcpd';
$pconfig['description'] = gettext("DHCPv4 Server");
$pconfig['php']['restart'] = array('dhcpd_dhcp4_configure');
$pconfig['php']['start'] = array('dhcpd_dhcp4_configure');
$pconfig['pidfile'] = '/var/dhcpd/var/run/dhcpd.pid';
$services[] = $pconfig;
}
if (dhcpd_dhcpv6_enabled()) {
$pconfig = array();
$pconfig['name'] = 'dhcpd6';
$pconfig['description'] = gettext("DHCPv6 Server");
$pconfig['php']['restart'] = array('dhcpd_dhcp6_configure');
$pconfig['php']['start'] = array('dhcpd_dhcp6_configure');
$pconfig['pidfile'] = '/var/dhcpd/var/run/dhcpdv6.pid';
$services[] = $pconfig;
}
return $services;
}
function dhcpd_radvd_configure($verbose = false, $blacklist = [])
{
global $config;
if (!dhcpd_radvd_enabled()) {
killbypid('/var/run/radvd.pid');
return;
}
service_log('Starting router advertisement service...', $verbose);
$ifconfig_details = legacy_interfaces_details();
$radvdconf = "# Automatically generated, do not edit\n";
/* Process all links which need the router advertise daemon */
$radvdifs = array();
/* handle manually configured DHCP6 server settings first */
foreach (config_read_array('dhcpdv6') as $dhcpv6if => $dhcpv6ifconf) {
if (isset($config['interfaces'][$dhcpv6if]['track6-interface']) && !isset($config['interfaces'][$dhcpv6if]['dhcpd6track6allowoverride'])) {
continue;
} elseif (!isset($config['interfaces'][$dhcpv6if]['enable'])) {
$radvdconf .= "# Skipping disabled interface {$dhcpv6if}\n";
continue;
} elseif (isset($blacklist[$dhcpv6if])) {
$radvdconf .= "# Skipping blacklisted interface {$dhcpv6if}\n";
continue;
} elseif (!isset($dhcpv6ifconf['ramode']) || $dhcpv6ifconf['ramode'] == 'disabled') {
$radvdconf .= "# Skipping unset interface {$dhcpv6if}\n";
continue;
}
$carp_mode = false;
$src_addr = false;
$ifcfgipv6 = get_interface_ipv6(!empty($dhcpv6ifconf['rainterface']) ? $dhcpv6ifconf['rainterface'] : $dhcpv6if);
if (!is_ipaddrv6($ifcfgipv6) && !isset($config['interfaces'][$dhcpv6if]['dhcpd6track6allowoverride'])) {
$radvdconf .= "# Skipping addressless interface {$dhcpv6if}\n";
continue;
}
$realif = get_real_interface($dhcpv6if, 'inet6');
$radvdifs[$realif] = 1;
$mtu = legacy_interface_stats($realif)['mtu'];
if (isset($config['interfaces'][$dhcpv6if]['track6-interface'])) {
$realtrackif = get_real_interface($config['interfaces'][$dhcpv6if]['track6-interface'], 'inet6');
$trackmtu = legacy_interface_stats($realtrackif)['mtu'];
if (!empty($trackmtu) && !empty($mtu)) {
if ($trackmtu < $mtu) {
$mtu = $trackmtu;
}
}
}
if (!empty($dhcpv6ifconf['AdvLinkMTU']) && !empty($mtu)) {
if ($dhcpv6ifconf['AdvLinkMTU'] < $mtu) {
$mtu = $dhcpv6ifconf['AdvLinkMTU'];
} else {
log_msg("Skipping AdvLinkMTU configuration since it cannot be applied on {$dhcpv6if}", LOG_WARNING);
}
}
$radvdconf .= "# Generated RADVD config for manual assignment on {$dhcpv6if}\n";
$radvdconf .= "interface {$realif} {\n";
$radvdconf .= "\tAdvSendAdvert on;\n";
$radvdconf .= sprintf("\tMinRtrAdvInterval %s;\n", !empty($dhcpv6ifconf['ramininterval']) ? $dhcpv6ifconf['ramininterval'] : '200');
$radvdconf .= sprintf("\tMaxRtrAdvInterval %s;\n", !empty($dhcpv6ifconf['ramaxinterval']) ? $dhcpv6ifconf['ramaxinterval'] : '600');
if (!empty($dhcpv6ifconf['AdvDefaultLifetime'])) {
$radvdconf .= sprintf("\tAdvDefaultLifetime %s;\n", $dhcpv6ifconf['AdvDefaultLifetime']);
}
$radvdconf .= sprintf("\tAdvLinkMTU %s;\n", !empty($mtu) ? $mtu : 0);
switch ($dhcpv6ifconf['rapriority']) {
case "low":
$radvdconf .= "\tAdvDefaultPreference low;\n";
break;
case "high":
$radvdconf .= "\tAdvDefaultPreference high;\n";
break;
default:
$radvdconf .= "\tAdvDefaultPreference medium;\n";
break;
}
switch ($dhcpv6ifconf['ramode']) {
case 'assist':
case 'managed':
$radvdconf .= "\tAdvManagedFlag on;\n";
$radvdconf .= "\tAdvOtherConfigFlag on;\n";
break;
case 'stateless':
$radvdconf .= "\tAdvManagedFlag off;\n";
$radvdconf .= "\tAdvOtherConfigFlag on;\n";
break;
default:
break;
}
if (!empty($dhcpv6ifconf['ranodefault'])) {
$radvdconf .= "\tAdvDefaultLifetime 0;\n";
}
$stanzas = [];
list (, $networkv6) = interfaces_primary_address6($dhcpv6if, $ifconfig_details);
if (is_subnetv6($networkv6)) {
$stanzas[] = $networkv6;
}
foreach (config_read_array('virtualip', 'vip') as $vip) {
if ($vip['interface'] != $dhcpv6if || !is_ipaddrv6($vip['subnet']) || $vip['subnet_bits'] == '128') {
continue;
}
if (is_linklocal($vip['subnet'])) {
if ($ifcfgipv6 == $vip['subnet']) {
$carp_mode = !empty($vip['vhid']);
$src_addr = true;
}
continue;
}
if (!empty($vip['nobind'])) {
continue;
}
/* force subnet to 64 as per radvd complaint "prefix length should be 64 for xzy" */
$subnetv6 = gen_subnetv6($vip['subnet'], 64);
$stanzas[] = "{$subnetv6}/64";
}
if ($src_addr) {
/* inject configured link-local address into the RA message */
$radvdconf .= "\tAdvRASrcAddress {\n";
$radvdconf .= "\t\t{$ifcfgipv6};\n";
$radvdconf .= "\t};\n";
}
if ($carp_mode) {
/* to avoid wrong MAC being stuck during failover */
$radvdconf .= "\tAdvSourceLLAddress off;\n";
/* to avoid final advertisement with zero router lifetime */
$radvdconf .= "\tRemoveAdvOnExit off;\n";
}
/* VIPs may duplicate readings from system */
$stanzas = array_unique($stanzas);
foreach ($stanzas as $stanza) {
$radvdconf .= "\tprefix {$stanza} {\n";
$radvdconf .= "\t\tDeprecatePrefix " . (!empty($dhcpv6ifconf['AdvDeprecatePrefix']) ? $dhcpv6ifconf['AdvDeprecatePrefix'] : ($carp_mode ? 'off' : 'on')) . ";\n";
switch ($dhcpv6ifconf['ramode']) {
case 'assist':
case 'stateless':
case 'unmanaged':
$radvdconf .= "\t\tAdvOnLink on;\n";
$radvdconf .= "\t\tAdvAutonomous on;\n";
break;
case 'managed':
$radvdconf .= "\t\tAdvOnLink on;\n";
$radvdconf .= "\t\tAdvAutonomous off;\n";
break;
case 'router':
$radvdconf .= "\t\tAdvOnLink off;\n";
$radvdconf .= "\t\tAdvAutonomous off;\n";
break;
default:
break;
}
if (!empty($dhcpv6ifconf['AdvValidLifetime'])) {
$radvdconf .= sprintf("\t\tAdvValidLifetime %s;\n", $dhcpv6ifconf['AdvValidLifetime']);
}
if (!empty($dhcpv6ifconf['AdvPreferredLifetime'])) {
$radvdconf .= sprintf("\t\tAdvPreferredLifetime %s;\n", $dhcpv6ifconf['AdvPreferredLifetime']);
}
$radvdconf .= "\t};\n";
}
if (!empty($dhcpv6ifconf['raroutes'])) {
foreach (explode(',', $dhcpv6ifconf['raroutes']) as $raroute) {
$radvdconf .= "\troute {$raroute} {\n";
$radvdconf .= "\t\tRemoveRoute " . (!empty($dhcpv6ifconf['AdvRemoveRoute']) ? $dhcpv6ifconf['AdvRemoveRoute'] : ($carp_mode ? 'off' : 'on')) . ";\n";
if (!empty($dhcpv6ifconf['AdvRouteLifetime'])) {
$radvdconf .= "\t\tAdvRouteLifetime {$dhcpv6ifconf['AdvRouteLifetime']};\n";
}
$radvdconf .= "\t};\n";
}
}
$dnslist = [];
$dnssl = null;
/* advertise both DNS servers and domains via RA (RFC 8106) if allowed */
if (!isset($dhcpv6ifconf['radisablerdnss'])) {
$dnslist_tmp = [];
if (isset($dhcpv6ifconf['rasamednsasdhcp6']) && !empty($dhcpv6ifconf['dnsserver'][0])) {
$dnslist_tmp = $dhcpv6ifconf['dnsserver'];
} elseif (!isset($dhcpv6ifconf['rasamednsasdhcp6']) && !empty($dhcpv6ifconf['radnsserver'][0])) {
$dnslist_tmp = $dhcpv6ifconf['radnsserver'];
} elseif (!empty(service_by_filter(['dns_ports' => '53']))) {
if (is_ipaddrv6($ifcfgipv6)) {
$dnslist_tmp[] = $ifcfgipv6;
} else {
log_msg("dhcpd_radvd_configure(manual) found no suitable IPv6 address on {$dhcpv6if}({$realif})", LOG_WARNING);
}
} elseif (!empty($config['system']['dnsserver'][0])) {
$dnslist_tmp = $config['system']['dnsserver'];
}
foreach ($dnslist_tmp as $server) {
if (!is_ipaddrv6($server)) {
continue;
}
if (count($dnslist) >= 3) {
log_msg("The radvd RDNSS entry $server cannot be added due to too many addresses.", LOG_WARNING);
continue;
}
$dnslist[] = $server;
}
if (isset($dhcpv6ifconf['rasamednsasdhcp6']) && !empty($dhcpv6ifconf['domainsearchlist'])) {
$dnssl = implode(' ', explode(';', $dhcpv6ifconf['domainsearchlist']));
} elseif (!isset($dhcpv6ifconf['rasamednsasdhcp6']) && !empty($dhcpv6ifconf['radomainsearchlist'])) {
$dnssl = implode(' ', explode(';', $dhcpv6ifconf['radomainsearchlist']));
} elseif (!empty($config['system']['domain'])) {
$dnssl = $config['system']['domain'];
}
}
if (count($dnslist) > 0) {
$radvdconf .= "\tRDNSS " . implode(" ", $dnslist) . " {\n";
if (!empty($dhcpv6ifconf['AdvRDNSSLifetime'])) {
$radvdconf .= "\t\tAdvRDNSSLifetime {$dhcpv6ifconf['AdvRDNSSLifetime']};\n";
}
$radvdconf .= "\t};\n";
}
if (!empty($dnssl)) {
$radvdconf .= "\tDNSSL {$dnssl} {\n";
if (!empty($dhcpv6ifconf['AdvDNSSLLifetime'])) {
$radvdconf .= "\t\tAdvDNSSLLifetime {$dhcpv6ifconf['AdvDNSSLLifetime']};\n";
}
$radvdconf .= "\t};\n";
}
$radvdconf .= "};\n";
}
/* handle DHCP-PD prefixes and 6RD dynamic interfaces */
foreach (array_keys(get_configured_interface_with_descr()) as $if) {
if (!isset($config['interfaces'][$if]['track6-interface'])) {
continue;
} elseif (empty($config['interfaces'][$config['interfaces'][$if]['track6-interface']])) {
$radvdconf .= "# Skipping defunct interface {$if}\n";
continue;
} elseif (!isset($config['interfaces'][$if]['enable'])) {
$radvdconf .= "# Skipping disabled interface {$if}\n";
continue;
} elseif (isset($blacklist[$if])) {
$radvdconf .= "# Skipping blacklisted interface {$if}\n";
continue;
}
$trackif = $config['interfaces'][$if]['track6-interface'];
$realif = get_real_interface($if, 'inet6');
/* prevent duplicate entries, manual overrides */
if (isset($radvdifs[$realif])) {
continue;
}
$radvdifs[$realif] = 1;
$autotype = 'unknown';
if (isset($config['interfaces'][$trackif]['ipaddrv6'])) {
$autotype = $config['interfaces'][$trackif]['ipaddrv6'];
}
$realtrackif = get_real_interface($trackif, 'inet6');
$mtu = legacy_interface_stats($realif)['mtu'];
$trackmtu = legacy_interface_stats($realtrackif)['mtu'];
if (!empty($trackmtu) && !empty($mtu)) {
if ($trackmtu < $mtu) {
$mtu = $trackmtu;
}
}
$dnslist = [];
list ($ifcfgipv6, $networkv6) = interfaces_primary_address6($if, $ifconfig_details);
if ($autotype == 'slaac') {
/* XXX this may be incorrect and needs an override or revisit */
$networkv6 = '2000::/64';
}
if (!empty(service_by_filter(['dns_ports' => '53']))) {
if (is_ipaddrv6($ifcfgipv6)) {
$dnslist[] = $ifcfgipv6;
} else {
log_msg("dhcpd_radvd_configure(auto) found no suitable IPv6 address on {$if}({$realif})", LOG_WARNING);
}
} elseif (!empty($config['system']['dnsserver'])) {
foreach ($config['system']['dnsserver'] as $server) {
if (!is_ipaddrv6($server)) {
continue;
}
if (count($dnslist) >= 3) {
log_msg("The radvd RDNSS entry $server cannot be added due to too many addresses.", LOG_WARNING);
continue;
}
$dnslist[] = $server;
}
}
$radvdconf .= "# Generated RADVD config for {$autotype} assignment from {$trackif} on {$if}\n";
$radvdconf .= "interface {$realif} {\n";
$radvdconf .= "\tAdvSendAdvert on;\n";
$radvdconf .= sprintf("\tAdvLinkMTU %s;\n", !empty($mtu) ? $mtu : 0);
$radvdconf .= "\tAdvManagedFlag on;\n";
$radvdconf .= "\tAdvOtherConfigFlag on;\n";
if (!empty($networkv6)) {
$radvdconf .= "\tprefix {$networkv6} {\n";
if ($autotype == 'slaac') {
/* XXX also of interest in the future, see hardcoded prefix above */
$radvdconf .= "\t\tBase6Interface $realtrackif;\n";
}
$radvdconf .= "\t\tDeprecatePrefix on;\n";
$radvdconf .= "\t\tAdvOnLink on;\n";
$radvdconf .= "\t\tAdvAutonomous on;\n";
$radvdconf .= "\t};\n";
}
foreach (config_read_array('virtualip', 'vip') as $vip) {
if ($vip['interface'] != $if || !is_ipaddrv6($vip['subnet']) || $vip['subnet_bits'] == '128') {
continue;
}
if (is_linklocal($vip['subnet']) || !empty($vip['nobind'])) {
continue;
}
/* force subnet to 64 as per radvd complaint "prefix length should be 64 for xzy" */
$subnetv6 = gen_subnetv6($vip['subnet'], 64);
$vipnetv6 = "{$subnetv6}/64";
if ($vipnetv6 == $networkv6) {
continue;
}
$radvdconf .= "\tprefix {$vipnetv6} {\n";
$radvdconf .= "\t\tDeprecatePrefix on;\n";
$radvdconf .= "\t\tAdvOnLink on;\n";
$radvdconf .= "\t\tAdvAutonomous on;\n";
$radvdconf .= "\t};\n";
}
if (count($dnslist) > 0) {
$radvdconf .= "\tRDNSS " . implode(" ", $dnslist) . " { };\n";
}
if (!empty($config['system']['domain'])) {
$radvdconf .= "\tDNSSL {$config['system']['domain']} { };\n";
}
$radvdconf .= "};\n";
}
$radvd_conf_file = '/var/etc/radvd.conf';
file_put_contents($radvd_conf_file, $radvdconf);
if (count($radvdifs)) {
$last_version = @file_get_contents("{$radvd_conf_file}.last");
$this_version = shell_safe('/bin/cat %s | sha256', $radvd_conf_file);
if (isvalidpid('/var/run/radvd.pid') && $last_version == $this_version) {
killbypid('/var/run/radvd.pid', 'HUP');
} else {
killbypid('/var/run/radvd.pid');
file_put_contents("{$radvd_conf_file}.last", $this_version);
mwexec('/usr/local/sbin/radvd -p /var/run/radvd.pid -C /var/etc/radvd.conf -m syslog');
}
} else {
/* stop on invalid configuration for legacy condition above */
killbypid('/var/run/radvd.pid');
@unlink("{$radvd_conf_file}.last");
}
service_log("done.\n", $verbose);
}
function dhcpd_dhcp_configure($verbose = false, $family = null, $blacklist = [])
{
$dirs = ['/dev', '/etc', '/lib', '/run', '/usr', '/usr/local/sbin', '/var/db', '/var/run'];
foreach ($dirs as $dir) {
mwexecf('/bin/mkdir -p %s', "/var/dhcpd{$dir}");
}
if (mwexecf('/sbin/mount -uw %s', '/var/dhcpd/dev', true)) {
mwexecf('/sbin/mount -t devfs devfs %s', '/var/dhcpd/dev');
}
mwexecf('/usr/sbin/chown -R dhcpd:dhcpd %s', '/var/dhcpd');
if ($family == null || $family == 'inet') {
dhcpd_dhcp4_configure($verbose);
}
if ($family == null || $family == 'inet6') {
dhcpd_dhcp6_configure($verbose, $blacklist);
dhcpd_radvd_configure($verbose, $blacklist);
}
}
function dhcpd_dhcp4_configure($verbose = false)
{
global $config;
$need_ddns_updates = false;
$ddns_zones = [];
if (!dhcpd_dhcpv4_enabled()) {
/*
* XXX If there is no enabled server interfaces_staticarp_configure()
* is not executed as documented. This likely does not matter, but
* since it came up as odd in testing make a note here for the future.
*/
killbypid('/var/dhcpd/var/run/dhcpd.pid');
return;
}
service_log('Starting DHCPv4 service...', $verbose);
killbypid('/var/dhcpd/var/run/dhcpd.pid');
/* Only consider DNS servers with IPv4 addresses for the IPv4 DHCP server. */
$dns_arrv4 = [];
if (!empty($config['system']['dnsserver'][0])) {
foreach ($config['system']['dnsserver'] as $dnsserver) {
if (is_ipaddrv4($dnsserver)) {
$dns_arrv4[] = $dnsserver;
}
}
}
$custoptions = "";
$ifconfig_details = legacy_interfaces_details();
foreach ($config['dhcpd'] as $dhcpif => $dhcpifconf) {
if (isset($dhcpifconf['numberoptions']['item'])) {
foreach ($dhcpifconf['numberoptions']['item'] as $itemidx => $item) {
if (!empty($item['type'])) {
$itemtype = $item['type'];
} else {
$itemtype = "text";
}
$custoptions .= "option custom-{$dhcpif}-{$itemidx} code {$item['number']} = {$itemtype};\n";
}
}
}
$dhcpdconf = <<<EOD
option domain-name "{$config['system']['domain']}";
option ldap-server code 95 = text;
option arch code 93 = unsigned integer 16; # RFC4578
option pac-webui code 252 = text;
{$custoptions}
default-lease-time 7200;
max-lease-time 86400;
log-facility local7;
one-lease-per-client true;
deny duplicates;
ping-check true;
update-conflict-detection false;
authoritative;
EOD;
$omapi_added = false;
$dhcpdifs = [];
/*
* loop through and determine if we need
* to setup failover peer "bleh" entries
*/
foreach ($config['dhcpd'] as $dhcpif => $dhcpifconf) {
/* certainly odd but documented and side effect populates ARP table */
interfaces_staticarp_configure($dhcpif, $ifconfig_details);
if (!isset($dhcpifconf['enable'])) {
continue;
}
if (!empty($dhcpifconf['failover_peerip'])) {
$intip = get_interface_ip($dhcpif, $ifconfig_details);
$failover_primary = false;
if (!empty($config['virtualip']['vip'])) {
foreach ($config['virtualip']['vip'] as $vipent) {
if ($vipent['interface'] == $dhcpif) {
$carp_nw = gen_subnet($vipent['subnet'], $vipent['subnet_bits']);
if (ip_in_subnet($dhcpifconf['failover_peerip'], "{$carp_nw}/{$vipent['subnet_bits']}")) {
/* this is the interface! */
if (is_numeric($vipent['advskew']) && (intval($vipent['advskew']) < 20)) {
$failover_primary = true;
}
break;
}
}
}
} else {
log_msg("DHCP failover set up on {$dhcpif} but no CARP virtual IPs defined!", LOG_WARNING);
}
$dhcpdconf_pri = "";
if ($failover_primary) {
$my_port = "519";
$peer_port = "520";
$type = "primary";
$dhcpdconf_pri = "split 128;\n";
if (isset($dhcpifconf['failover_split'])) {
$dhcpdconf_pri = "split {$dhcpifconf['failover_split']};\n";
}
$dhcpdconf_pri .= " mclt 600;\n";
} else {
$type = "secondary";
$my_port = "520";
$peer_port = "519";
}
if (is_ipaddrv4($intip)) {
$dhcpdconf .= <<<EOPP
failover peer "dhcp_{$dhcpif}" {
{$type};
address {$intip};
port {$my_port};
peer address {$dhcpifconf['failover_peerip']};
peer port {$peer_port};
max-response-delay 10;
max-unacked-updates 10;
{$dhcpdconf_pri}
load balance max seconds 3;
}
\n
EOPP;
}
}
}
$iflist = get_configured_interface_with_descr();
foreach ($config['dhcpd'] as $dhcpif => $dhcpifconf) {
if (!isset($dhcpifconf['enable']) || !isset($iflist[$dhcpif])) {
continue;
}
list ($ifcfgip, $ifcfgnet, $ifcfgsn) = interfaces_primary_address($dhcpif, $ifconfig_details);
if (!is_ipaddrv4($ifcfgip) || !is_subnetv4($ifcfgnet)) {
$realif = get_real_interface($dhcpif);
log_msg("dhcpd_dhcp4_configure() found no suitable IPv4 address on {$dhcpif}({$realif})", LOG_WARNING);
continue;
}
$subnetmask = gen_subnet_mask($ifcfgsn);
$subnet = explode('/', $ifcfgnet)[0];
$all_pools = [];
$all_pools[] = $dhcpifconf;
if (!empty($dhcpifconf['pool'])) {
$all_pools = array_merge($all_pools, $dhcpifconf['pool']);
}
$dnscfg = "";
if (!empty($dhcpifconf['domain'])) {
$dnscfg .= " option domain-name \"{$dhcpifconf['domain']}\";\n";
}
if (!empty($dhcpifconf['domainsearchlist'])) {
$dnscfg .= " option domain-search \"" . join("\",\"", preg_split("/[ ;]+/", $dhcpifconf['domainsearchlist'])) . "\";\n";
}
$newzone = [];
if (isset($dhcpifconf['ddnsupdate'])) {
$need_ddns_updates = true;
if (!empty($dhcpifconf['ddnsdomain'])) {
$newzone['domain-name'] = $dhcpifconf['ddnsdomain'];
$dnscfg .= " ddns-domainname \"{$dhcpifconf['ddnsdomain']}\";\n";
} else {
$newzone['domain-name'] = $config['system']['domain'];
}
$revsubnet = array_reverse(explode(".", $subnet));
$subnetmask_rev = array_reverse(explode('.', $subnetmask));
foreach ($subnetmask_rev as $octet) {
if ($octet == "0") {
array_shift($revsubnet);
}
}
$newzone['ptr-domain'] = implode(".", $revsubnet) . ".in-addr.arpa";
}
if (!empty($dhcpifconf['dnsserver'][0])) {
$dnscfg .= " option domain-name-servers " . join(",", $dhcpifconf['dnsserver']) . ";";
if (!empty($newzone['domain-name'])) {
$newzone['dns-servers'] = $dhcpifconf['dnsserver'];
}
} elseif (!empty(service_by_filter(['dns_ports' => '53']))) {
$dnscfg .= " option domain-name-servers {$ifcfgip};";
if (!empty($newzone['domain-name'])) {
$newzone['dns-servers'] = [$ifcfgip];
}
} elseif (!empty($dns_arrv4)) {
$dnscfg .= " option domain-name-servers " . join(",", $dns_arrv4) . ";";
if (!empty($newzone['domain-name'])) {
$newzone['dns-servers'] = $dns_arrv4;
}
}
/*
* Create classes - These all contain comma-separated lists.
* Join them into one big comma-separated string then split
* them all up.
*/
$all_mac_strings = [];
foreach ($all_pools as $poolconf) {
if (!empty($poolconf['mac_allow'])) {
$all_mac_strings[] = $poolconf['mac_allow'];
}
if (!empty($poolconf['mac_deny'])) {
$all_mac_strings[] = $poolconf['mac_deny'];
}
}
$all_mac_list = array_unique(explode(',', implode(',', $all_mac_strings)));
foreach ($all_mac_list as $mac) {
if (!empty($mac)) {
$dhcpdconf .= 'class "' . str_replace(':', '', $mac) . '" {' . "\n";
// Skip the first octet of the MAC address - for media type, typically Ethernet ("01") and match the rest.
$dhcpdconf .= ' match if substring (hardware, 1, ' . (substr_count($mac, ':') + 1) . ') = ' . $mac . ';' . "\n";
$dhcpdconf .= '}' . "\n";
}
}
$dhcpdconf .= "\nsubnet {$subnet} netmask {$subnetmask} {\n";
// Setup pool options
foreach ($all_pools as $poolconf) {
$dhcpdconf .= " pool {\n";
if (!empty($poolconf['dnsserver'][0])) {
$dhcpdconf .= ' option domain-name-servers ' . join(',', $poolconf['dnsserver']) . ";\n";
}
/* allow/deny MACs */
if (!empty($poolconf['mac_allow'])) {
$mac_allow_list = array_unique(explode(',', $poolconf['mac_allow']));
foreach ($mac_allow_list as $mac) {
if (!empty($mac)) {
$dhcpdconf .= " allow members of \"" . str_replace(':', '', $mac) . "\";\n";
}
}
}
if (!empty($poolconf['mac_deny'])) {
$mac_deny_list = array_unique(explode(',', $poolconf['mac_deny']));
foreach ($mac_deny_list as $mac) {
if (!empty($mac)) {
$dhcpdconf .= " deny members of \"" . str_replace(':', '', $mac) . "\";\n";
}
}
}
if (!empty($poolconf['failover_peerip'])) {
$dhcpdconf .= " deny dynamic bootp clients;\n";
}
if (isset($poolconf['denyunknown'])) {
$dhcpdconf .= " deny unknown-clients;\n";
}
if (isset($poolconf['ignoreuids'])) {
$dhcpdconf .= " ignore-client-uids true;\n";
}
if (
!empty($poolconf['gateway']) && $poolconf['gateway'] != "none"
&& (empty($dhcpifconf['gateway']) || $poolconf['gateway'] != $dhcpifconf['gateway'])
) {
$dhcpdconf .= " option routers {$poolconf['gateway']};\n";
}
if (!empty($dhcpifconf['failover_peerip'])) {
$dhcpdconf .= " failover peer \"dhcp_{$dhcpif}\";\n";
}
if (
!empty($poolconf['domain'])
&& (empty($dhcpifconf['domain']) || $poolconf['domain'] != $dhcpifconf['domain'])
) {
$dhcpdconf .= " option domain-name \"{$poolconf['domain']}\";\n";
}
if (
!empty($poolconf['domainsearchlist'])
&& (empty($dhcpifconf['domainsearchlist']) || $poolconf['domainsearchlist'] != $dhcpifconf['domainsearchlist'])
) {
$dhcpdconf .= " option domain-search \"" . join("\",\"", preg_split("/[ ;]+/", $poolconf['domainsearchlist'])) . "\";\n";
}
if (isset($poolconf['ddnsupdate'])) {
if (
!empty($poolconf['ddnsdomain'])
&& (empty($dhcpifconf['ddnsdomain']) || $poolconf['ddnsdomain'] != $dhcpifconf['ddnsdomain'])
) {
$dhcpdconf .= " ddns-domainname \"{$poolconf['ddnsdomain']}\";\n";
$newddnszone = [];
$newddnszone['domain-name'] = $poolconf['ddnsdomain'];
$newddnszone['dns-servers'] = array($poolconf['ddnsdomainprimary']);
$newddnszone['ddnsdomainkeyname'] = $poolconf['ddnsdomainkeyname'] ?? '';
$newddnszone['ddnsdomainkey'] = $poolconf['ddnsdomainkey'] ?? '';
$newddnszone['ddnsdomainalgorithm'] = !empty($poolconf['ddnsdomainalgorithm']) ? $poolconf['ddnsdomainalgorithm'] : "hmac-md5";
$ddns_zones[] = $newddnszone;
}
}
// default-lease-time
if (
!empty($poolconf['defaultleasetime'])
&& (empty($dhcpifconf['defaultleasetime']) || $poolconf['defaultleasetime'] != $dhcpifconf['defaultleasetime'])
) {
$dhcpdconf .= " default-lease-time {$poolconf['defaultleasetime']};\n";
}
// max-lease-time
if (
!empty($poolconf['maxleasetime'])
&& (empty($dhcpifconf['maxleasetime']) || $poolconf['maxleasetime'] != $dhcpifconf['maxleasetime'])
) {
$dhcpdconf .= " max-lease-time {$poolconf['maxleasetime']};\n";
}
// interface MTU
if (
!empty($poolconf['interface_mtu'])
&& (empty($dhcpifconf['interface_mtu']) || $poolconf['interface_mtu'] != $dhcpifconf['interface_mtu'])
) {
$dhcpdconf .= " option interface-mtu {$poolconf['interface_mtu']};\n";
}
// netbios-name*
if (
!empty($poolconf['winsserver'][0])
&& (empty($dhcpifconf['winsserver'][0]) || $poolconf['winsserver'][0] != $dhcpifconf['winsserver'][0])
) {
$dhcpdconf .= " option netbios-name-servers " . join(",", $poolconf['winsserver']) . ";\n";
$dhcpdconf .= " option netbios-node-type 8;\n";
}
// ntp-servers
if (
!empty($poolconf['ntpserver'][0])
&& (empty($dhcpifconf['ntpserver'][0]) || $poolconf['ntpserver'][0] != $dhcpifconf['ntpserver'][0])
) {
$dhcpdconf .= " option ntp-servers " . join(",", $poolconf['ntpserver']) . ";\n";
}
// tftp-server-name
if (!empty($poolconf['tftp']) && (empty($dhcpifconf['tftp']) || $poolconf['tftp'] != $dhcpifconf['tftp'])) {
$dhcpdconf .= " option tftp-server-name \"{$poolconf['tftp']}\";\n";
// bootfile-name
if (!empty($poolconf['bootfilename']) && (empty($dhcpifconf['bootfilename']) || $poolconf['bootfilename'] != $dhcpifconf['bootfilename'])) {
$dhcpdconf .= " option bootfile-name \"{$poolconf['bootfilename']}\";\n";
}
}
// ldap-server
if (!empty($poolconf['ldap']) && (empty($dhcpifconf['ldap']) || $poolconf['ldap'] != $dhcpifconf['ldap'])) {
$dhcpdconf .= " option ldap-server \"{$poolconf['ldap']}\";\n";
}
// net boot information
if (isset($poolconf['netboot'])) {
if (!empty($poolconf['nextserver']) && (empty($dhcpifconf['nextserver']) || $poolconf['nextserver'] != $dhcpifconf['nextserver'])) {
$dhcpdconf .= " next-server {$poolconf['nextserver']};\n";
}
if (!empty($poolconf['filename']) && (empty($dhcpifconf['filename']) || $poolconf['filename'] != $dhcpifconf['filename'])) {
$dhcpdconf .= " filename \"{$poolconf['filename']}\";\n";
}
if (!empty($poolconf['rootpath']) && (empty($dhcpifconf['rootpath']) || $poolconf['rootpath'] != $dhcpifconf['rootpath'])) {
$dhcpdconf .= " option root-path \"{$poolconf['rootpath']}\";\n";
}
}
$dhcpdconf .= " range {$poolconf['range']['from']} {$poolconf['range']['to']};\n";
$dhcpdconf .= " }\n\n";
}
// End of settings inside pools
if (!empty($dhcpifconf['gateway'])) {
$routers = $dhcpifconf['gateway'] != "none" ? $dhcpifconf['gateway'] : null;
} else {
// by default, add interface address in "option routers"
$routers = $ifcfgip;
}
if (!empty($routers)) {
$dhcpdconf .= " option routers {$routers};\n";
}
$dhcpdconf .= <<<EOD
$dnscfg
EOD;
// default-lease-time
if (!empty($dhcpifconf['defaultleasetime'])) {
$dhcpdconf .= " default-lease-time {$dhcpifconf['defaultleasetime']};\n";
}
// max-lease-time
if (!empty($dhcpifconf['maxleasetime'])) {
$dhcpdconf .= " max-lease-time {$dhcpifconf['maxleasetime']};\n";
}
// min-secs
if (!empty($dhcpifconf['minsecs'])) {
$dhcpdconf .= " min-secs {$dhcpifconf['minsecs']};\n";
}
// interface MTU
if (!empty($dhcpifconf['interface_mtu'])) {
$dhcpdconf .= " option interface-mtu {$dhcpifconf['interface_mtu']};\n";
}
// netbios-name*
if (!empty($dhcpifconf['winsserver'][0])) {
$dhcpdconf .= " option netbios-name-servers " . join(",", $dhcpifconf['winsserver']) . ";\n";
$dhcpdconf .= " option netbios-node-type 8;\n";
}
// ntp-servers
if (!empty($dhcpifconf['ntpserver'][0])) {
$dhcpdconf .= " option ntp-servers " . join(",", $dhcpifconf['ntpserver']) . ";\n";
}
// tftp-server-name
if (!empty($dhcpifconf['tftp'])) {
$dhcpdconf .= " option tftp-server-name \"{$dhcpifconf['tftp']}\";\n";
// bootfile-name
if (!empty($dhcpifconf['bootfilename'])) {
$dhcpdconf .= " option bootfile-name \"{$dhcpifconf['bootfilename']}\";\n";
}
}
// add pac url if it applies
if (isset($dhcpifconf['wpad']) && !empty($config['system']['hostname']) && !empty($config['system']['domain'])) {
$protocol = !empty($config['system']['webgui']['protocol']) ? $config['system']['webgui']['protocol'] : 'https';
// take hostname from system settings - it can be used to be resolved to anything based on client IP
$host = implode('.', array('wpad', $config['system']['domain']));
$default_port = (isset($config['system']['webgui']['protocol']) && $config['system']['webgui']['protocol'] == 'https') ? 443 : 80;
$port = !empty($config['system']['webgui']['port']) ? $config['system']['webgui']['port'] : $default_port;
$webui_url = "$protocol://$host:$port/wpad.dat";