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<?php |
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/** |
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* Copyright 2015 François Kooman <[email protected]>. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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namespace fkooman\VPN\Server; |
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use RuntimeException; |
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use fkooman\VPN\Server\Config\IP; |
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class Utils |
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{ |
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public static function exec($cmd, $throwExceptionOnFailure = true) |
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{ |
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exec($cmd, $output, $returnValue); |
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if (0 !== $returnValue) { |
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if ($throwExceptionOnFailure) { |
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throw new RuntimeException( |
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sprintf('command "%s" did not complete successfully (%d)', $cmd, $returnValue) |
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); |
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} |
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} |
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} |
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public static function writeTempConfig($tmpConfig, array $configFileData) |
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{ |
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if (false === @file_put_contents($tmpConfig, implode(PHP_EOL, $configFileData))) { |
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throw new RuntimeException('unable to write temporary config file'); |
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} |
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} |
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public static function normalizeIP($ipAddress) |
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{ |
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return inet_ntop(inet_pton($ipAddress)); |
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} |
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/** |
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* Convert IPv4 CIDR address to IPv6 address with prefix containing the |
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* IPv4 address with the same prefix. |
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* |
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* @param string $v6p the IPv6 prefix, e.g.: fd00:4242:4242:1194 |
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* @param string $v4c the IPv4 CIDR, e.g. 10.42.42.0/24 |
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* |
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* @return string the IPv6 address range containing the IPv4 CIDR, e.g.: |
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* fd00:4242:4242:1194:0:ffff:0a2a:2a00/120 |
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*/ |
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public static function convert4to6($v6p, $v4c) |
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{ |
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list($net4, $prefix4) = explode('/', $v4c); |
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$prefix6 = 128 - (32 - $prefix4); |
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$v4e = str_split(bin2hex(inet_pton($net4)), 4); |
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return sprintf( |
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'%s/%d', |
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self::normalizeIP( |
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sprintf('%s::ffff:%s:%s', $v6p, $v4e[0], $v4e[1]) |
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), |
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$prefix6 |
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); |
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} |
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public static function getActiveLeases($leaseDir) |
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{ |
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$activeLeases = []; |
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foreach (glob(sprintf('%s/*', $leaseDir)) as $leaseFile) { |
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$activeLeases[] = basename($leaseFile); |
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} |
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return $activeLeases; |
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} |
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public static function addRoute4($v4, $dev) |
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{ |
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self::delRoute4($v4, false); |
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self::flushRouteCache4(); |
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$cmd = sprintf('/usr/bin/sudo /sbin/ip -4 ro add %s/32 dev %s', $v4, $dev); |
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self::exec($cmd); |
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} |
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public static function addRoute6($v6, $dev) |
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{ |
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self::delRoute6($v6, false); |
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self::flushRouteCache6(); |
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$cmd = sprintf('/usr/bin/sudo /sbin/ip -6 ro add %s/128 dev %s', $v6, $dev); |
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self::exec($cmd); |
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} |
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public static function delRoute4($v4, $throwExceptionOnFailure = true) |
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{ |
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$cmd = sprintf('/usr/bin/sudo /sbin/ip -4 ro del %s/32', $v4); |
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self::exec($cmd, $throwExceptionOnFailure); |
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self::flushRouteCache4(); |
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} |
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public static function delRoute6($v6, $throwExceptionOnFailure = true) |
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{ |
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$cmd = sprintf('/usr/bin/sudo /sbin/ip -6 ro del %s/128', $v6); |
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self::exec($cmd, $throwExceptionOnFailure); |
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self::flushRouteCache6(); |
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} |
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private static function flushRouteCache4() |
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{ |
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$cmd = '/usr/bin/sudo /sbin/ip -4 ro flush cache'; |
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self::exec($cmd, false); |
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} |
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private static function flushRouteCache6() |
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{ |
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$cmd = '/usr/bin/sudo /sbin/ip -6 ro flush cache'; |
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self::exec($cmd, false); |
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} |
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public static function configDataToOpenVpn($configData) |
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{ |
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if (false === $configData) { |
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return ['disable']; |
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} |
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$configDataArray = [ |
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sprintf('ifconfig-push %s %s', $configData['v4'], $configData['v4_netmask']), |
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sprintf('ifconfig-ipv6-push %s/64 %s', $configData['v6'], $configData['v6_gw']), |
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]; |
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if ($configData['default_gw']) { |
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$configDataArray[] = 'push "redirect-gateway def1 bypass-dhcp"'; |
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# for Windows clients we need this extra route to mark the TAP adapter as |
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# trusted and as having "Internet" access to allow the user to set it to |
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# "Home" or "Work" to allow accessing file shares and printers |
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$configDataArray[] = 'push "route 0.0.0.0 0.0.0.0"'; |
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# for iOS we need this OpenVPN 2.4 "ipv6" flag to redirect-gateway |
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# See https://docs.openvpn.net/docs/openvpn-connect/openvpn-connect-ios-faq.html |
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$configDataArray[] = 'push "redirect-gateway ipv6"'; |
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# we use 2000::/3 instead of ::/0 because it seems to break on native IPv6 |
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# networks where the ::/0 default router already exists |
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$configDataArray[] = 'push "route-ipv6 2000::/3"'; |
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foreach ($configData['dns'] as $dnsAddress) { |
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$configDataArray[] = sprintf('push "dhcp-option DNS %s"', $dnsAddress); |
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} |
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} else { |
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foreach ($configData['dst_net4'] as $dstNet4) { |
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$net4 = new IP($dstNet4); |
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$configDataArray[] = sprintf('push "route %s %s"', $net4->getNetwork(), $net4->getNetmask()); |
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} |
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foreach ($configData['dst_net6'] as $dstNet6) { |
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$configDataArray[] = sprintf('push "route-ipv6 %s"', $dstNet6); |
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} |
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} |
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return $configDataArray; |
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} |
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} |
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eduVPN /
vpn-server-api
