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<?php
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/* $Id$ */
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/*
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vpn.inc
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Copyright (C) 2004 Scott Ullrich
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All rights reserved.
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originally part of m0n0wall (http://m0n0.ch/wall)
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Copyright (C) 2003-2004 Manuel Kasper <mk@neon1.net>.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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/* include all configuration functions */
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require_once("functions.inc");
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function find_last_gif_device() {
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$last_gif_found = -1;
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if (!($fp = popen("/sbin/ifconfig -l", "r"))) return -1;
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$ifconfig_data = fread($fp, 4096);
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pclose($fp);
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$ifconfig_array = split(" ", $ifconfig_data);
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foreach ($ifconfig_array as $ifconfig) {
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ereg("gif(.)", $ifconfig, $regs);
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if($regs[0]) {
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if($regs[0] > $last_gif_found)
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$last_gif_found = $regs[1];
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}
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}
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return $last_gif_found;
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}
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function vpn_ipsec_configure($ipchg = false) {
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global $config, $g;
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if(isset($config['ipsec']['preferredoldsa'])) {
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mwexec("/sbin/sysctl net.key.preferred_oldsa=0");
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} else {
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mwexec("/sbin/sysctl -w net.key.preferred_oldsa=-30");
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}
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$number_of_gifs = find_last_gif_device();
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for($x=0; $x<$number_of_gifs; $x++) {
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mwexec("/sbin/ifconfig gif" . $x . " delete");
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}
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$curwanip = get_current_wan_address();
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if($config['ipsec']['ip'] <> "")
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$curwanip = $config['ipsec']['ip'];
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$syscfg = $config['system'];
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$ipseccfg = $config['ipsec'];
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$lancfg = $config['interfaces']['lan'];
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$lanip = $lancfg['ipaddr'];
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$lansa = gen_subnet($lancfg['ipaddr'], $lancfg['subnet']);
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$lansn = $lancfg['subnet'];
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if ($g['booting']) {
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if (!isset($ipseccfg['enable']))
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return 0;
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echo "Configuring IPsec VPN... ";
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} else {
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/* kill racoon */
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killbypid("{$g['varrun_path']}/racoon.pid");
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/* wait for process to die */
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sleep(2);
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/* send a SIGKILL to be sure */
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sigkillbypid("{$g['varrun_path']}/racoon.pid", "KILL");
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}
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/* flush SPD and SAD */
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mwexec("/usr/sbin/setkey -FP");
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mwexec("/usr/sbin/setkey -F");
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if (isset($ipseccfg['enable'])) {
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/* fastforwarding is not compatible with ipsec tunnels */
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system("/sbin/sysctl net.inet.ip.fastforwarding=0 >/dev/null 2>&1");
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if (!$curwanip) {
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/* IP address not configured yet, exit */
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if ($g['booting'])
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echo "done.\n";
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return 0;
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}
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if ((is_array($ipseccfg['tunnel']) && count($ipseccfg['tunnel'])) ||
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isset($ipseccfg['mobileclients']['enable'])) {
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if (is_array($ipseccfg['tunnel']) && count($ipseccfg['tunnel'])) {
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/* generate spd.conf */
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$fd = fopen("{$g['varetc_path']}/spd.conf", "w");
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if (!$fd) {
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printf("Error: cannot open spd.conf in vpn_ipsec_configure().\n");
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return 1;
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}
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$spdconf = "";
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$spdconf .= "spdadd {$lansa}/{$lansn} {$lanip}/32 any -P in none;\n";
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$spdconf .= "spdadd {$lanip}/32 {$lansa}/{$lansn} any -P out none;\n";
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foreach ($ipseccfg['tunnel'] as $tunnel) {
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if (isset($tunnel['disabled']))
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continue;
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$ep = vpn_endpoint_determine($tunnel, $curwanip);
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if (!$ep)
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continue;
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vpn_localnet_determine($tunnel['local-subnet'], $sa, $sn);
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if(isset($tunnel['creategif'])) {
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$number_of_gifs = find_last_gif_device();
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$number_of_gifs++;
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$curwanip = get_current_wan_address();
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if($config['ipsec']['ip'] <> "")
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$curwanip = $config['ipsec']['ip'];
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mwexec("/sbin/ifconfig gif" . $number_of_gifs . " tunnel" . $curwanip . " " . $tunnel['remote-gateway']);
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mwexec("/sbin/ifconfig gif" . $number_of_gifs . " {$lansa}/{$lansn} {$lanip}/32");
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}
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$spdconf .= "spdadd {$sa}/{$sn} " .
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"{$tunnel['remote-subnet']} any -P out ipsec " .
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"{$tunnel['p2']['protocol']}/tunnel/{$ep}-" .
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"{$tunnel['remote-gateway']}/unique;\n";
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$spdconf .= "spdadd {$tunnel['remote-subnet']} " .
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"{$sa}/{$sn} any -P in ipsec " .
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"{$tunnel['p2']['protocol']}/tunnel/{$tunnel['remote-gateway']}-" .
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"{$ep}/unique;\n";
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}
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fwrite($fd, $spdconf);
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fclose($fd);
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/* load SPD */
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mwexec("/usr/sbin/setkey -c < {$g['varetc_path']}/spd.conf");
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}
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/* generate racoon.conf */
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$fd = fopen("{$g['varetc_path']}/racoon.conf", "w");
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if (!$fd) {
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printf("Error: cannot open racoon.conf in vpn_ipsec_configure().\n");
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return 1;
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}
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$racoonconf = "";
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if($config['ipsec']['ip'] <> "") {
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$interface_ip = $config['ipsec']['ip'];
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$racoonconf .= <<<EOD
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listen {
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isakmp {$interface_ip} [500];
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}
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EOD;
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}
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$racoonconf .= "path pre_shared_key \"{$g['varetc_path']}/psk.txt\";\n\n";
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if (is_array($ipseccfg['tunnel']) && count($ipseccfg['tunnel']))
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foreach ($ipseccfg['tunnel'] as $tunnel) {
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if (isset($tunnel['disabled']))
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continue;
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$ep = vpn_endpoint_determine($tunnel, $curwanip);
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if (!$ep)
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continue;
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vpn_localnet_determine($tunnel['local-subnet'], $sa, $sn);
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if (isset($tunnel['p1']['myident']['myaddress'])) {
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$myidentt = "address";
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$myident = $ep;
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} else if (isset($tunnel['p1']['myident']['address'])) {
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$myidentt = "address";
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$myident = $tunnel['p1']['myident']['address'];
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} else if (isset($tunnel['p1']['myident']['fqdn'])) {
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$myidentt = "fqdn";
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$myident = $tunnel['p1']['myident']['fqdn'];
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} else if (isset($tunnel['p1']['myident']['ufqdn'])) {
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$myidentt = "user_fqdn";
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$myident = $tunnel['p1']['myident']['ufqdn'];
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}
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$racoonconf .= <<<EOD
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remote {$tunnel['remote-gateway']} \{
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exchange_mode {$tunnel['p1']['mode']};
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my_identifier {$myidentt} "{$myident}";
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peers_identifier address {$tunnel['remote-gateway']};
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initial_contact on;
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support_proxy on;
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proposal_check obey;
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proposal \{
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encryption_algorithm {$tunnel['p1']['encryption-algorithm']};
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hash_algorithm {$tunnel['p1']['hash-algorithm']};
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authentication_method pre_shared_key;
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dh_group {$tunnel['p1']['dhgroup']};
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EOD;
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if ($tunnel['p1']['lifetime'])
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$racoonconf .= " lifetime time {$tunnel['p1']['lifetime']} secs;\n";
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$racoonconf .= " }\n";
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if ($tunnel['p1']['lifetime'])
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$racoonconf .= " lifetime time {$tunnel['p1']['lifetime']} secs;\n";
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$racoonconf .= "}\n\n";
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$p2ealgos = join(",", $tunnel['p2']['encryption-algorithm-option']);
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$p2halgos = join(",", $tunnel['p2']['hash-algorithm-option']);
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$racoonconf .= <<<EOD
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sainfo address {$sa}/{$sn} any address {$tunnel['remote-subnet']} any \{
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encryption_algorithm {$p2ealgos};
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authentication_algorithm {$p2halgos};
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compression_algorithm deflate;
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EOD;
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if ($tunnel['p2']['pfsgroup'])
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$racoonconf .= " pfs_group {$tunnel['p2']['pfsgroup']};\n";
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if ($tunnel['p2']['lifetime'])
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$racoonconf .= " lifetime time {$tunnel['p2']['lifetime']} secs;\n";
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$racoonconf .= "}\n\n";
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}
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/* mobile clients? */
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if (isset($ipseccfg['mobileclients']['enable'])) {
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$tunnel = $ipseccfg['mobileclients'];
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if (isset($tunnel['p1']['myident']['myaddress'])) {
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$myidentt = "address";
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$myident = $curwanip;
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} else if (isset($tunnel['p1']['myident']['address'])) {
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$myidentt = "address";
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$myident = $tunnel['p1']['myident']['address'];
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} else if (isset($tunnel['p1']['myident']['fqdn'])) {
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$myidentt = "fqdn";
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$myident = $tunnel['p1']['myident']['fqdn'];
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} else if (isset($tunnel['p1']['myident']['ufqdn'])) {
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$myidentt = "user_fqdn";
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$myident = $tunnel['p1']['myident']['ufqdn'];
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}
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$racoonconf .= <<<EOD
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remote anonymous \{
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exchange_mode {$tunnel['p1']['mode']};
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my_identifier {$myidentt} "{$myident}";
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initial_contact on;
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passive on;
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generate_policy on;
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support_proxy on;
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proposal_check obey;
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proposal \{
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encryption_algorithm {$tunnel['p1']['encryption-algorithm']};
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hash_algorithm {$tunnel['p1']['hash-algorithm']};
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authentication_method pre_shared_key;
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dh_group {$tunnel['p1']['dhgroup']};
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EOD;
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if ($tunnel['p1']['lifetime'])
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$racoonconf .= " lifetime time {$tunnel['p1']['lifetime']} secs;\n";
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$racoonconf .= " }\n";
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300
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301
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if ($tunnel['p1']['lifetime'])
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$racoonconf .= " lifetime time {$tunnel['p1']['lifetime']} secs;\n";
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303
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304
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$racoonconf .= "}\n\n";
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305
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306
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$p2ealgos = join(",", $tunnel['p2']['encryption-algorithm-option']);
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$p2halgos = join(",", $tunnel['p2']['hash-algorithm-option']);
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308
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$racoonconf .= <<<EOD
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310
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sainfo anonymous \{
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311
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encryption_algorithm {$p2ealgos};
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312
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authentication_algorithm {$p2halgos};
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313
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compression_algorithm deflate;
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314
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EOD;
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316
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317
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if ($tunnel['p2']['pfsgroup'])
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$racoonconf .= " pfs_group {$tunnel['p2']['pfsgroup']};\n";
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319
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320
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if ($tunnel['p2']['lifetime'])
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$racoonconf .= " lifetime time {$tunnel['p2']['lifetime']} secs;\n";
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322
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323
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$racoonconf .= "}\n\n";
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324
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}
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325
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326
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fwrite($fd, $racoonconf);
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327
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fclose($fd);
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328
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329
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/* generate psk.txt */
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330
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$fd = fopen("{$g['varetc_path']}/psk.txt", "w");
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331
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if (!$fd) {
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332
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printf("Error: cannot open psk.txt in vpn_ipsec_configure().\n");
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333
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return 1;
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334
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}
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335
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336
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$pskconf = "";
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337
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338
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if (is_array($ipseccfg['tunnel'])) {
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339
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foreach ($ipseccfg['tunnel'] as $tunnel) {
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340
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if (isset($tunnel['disabled']))
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341
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continue;
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342
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$pskconf .= "{$tunnel['remote-gateway']} {$tunnel['p1']['pre-shared-key']}\n";
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343
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}
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344
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}
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345
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346
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/* add PSKs for mobile clients */
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347
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if (is_array($ipseccfg['mobilekey'])) {
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348
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foreach ($ipseccfg['mobilekey'] as $key) {
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349
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$pskconf .= "{$key['ident']} {$key['pre-shared-key']}\n";
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350
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}
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351
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}
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352
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353
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fwrite($fd, $pskconf);
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354
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fclose($fd);
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355
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chmod("{$g['varetc_path']}/psk.txt", 0600);
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356
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357
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/* start racoon */
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358
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mwexec("/usr/local/sbin/racoon -d -f {$g['varetc_path']}/racoon.conf");
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359
|
|
|
360
|
if(is_array($ipseccfg['tunnel']))
|
|
361
|
foreach ($ipseccfg['tunnel'] as $tunnel) {
|
|
362
|
if (isset($tunnel['auto'])) {
|
|
363
|
$remotehost = substr($tunnel['remote-subnet'],0,strpos($tunnel['remote-subnet'],"/"));
|
|
364
|
$srchost = vpn_endpoint_determine($tunnel, $curwanip);
|
|
365
|
if ($srchost)
|
|
366
|
mwexec_bg("/sbin/ping -c 1 -S {$srchost} {$remotehost}");
|
|
367
|
}
|
|
368
|
}
|
|
369
|
}
|
|
370
|
}
|
|
371
|
|
|
372
|
if (!$g['booting']) {
|
|
373
|
/* reload the filter */
|
|
374
|
filter_configure();
|
|
375
|
}
|
|
376
|
|
|
377
|
if ($g['booting'])
|
|
378
|
echo "done.\n";
|
|
379
|
|
|
380
|
return 0;
|
|
381
|
}
|
|
382
|
|
|
383
|
function vpn_pptpd_configure() {
|
|
384
|
global $config, $g;
|
|
385
|
|
|
386
|
$syscfg = $config['system'];
|
|
387
|
$pptpdcfg = $config['pptpd'];
|
|
388
|
|
|
389
|
if ($g['booting']) {
|
|
390
|
if (!$pptpdcfg['mode'] || ($pptpdcfg['mode'] == "off"))
|
|
391
|
return 0;
|
|
392
|
|
|
393
|
echo "Configuring PPTP VPN... ";
|
|
394
|
} else {
|
|
395
|
/* kill mpd */
|
|
396
|
killbypid("{$g['varrun_path']}/mpd-vpn.pid");
|
|
397
|
|
|
398
|
/* wait for process to die */
|
|
399
|
sleep(2);
|
|
400
|
|
|
401
|
/* remove mpd.conf, if it exists */
|
|
402
|
unlink_if_exists("{$g['varetc_path']}/mpd-vpn/mpd.conf");
|
|
403
|
unlink_if_exists("{$g['varetc_path']}/mpd-vpn/mpd.links");
|
|
404
|
unlink_if_exists("{$g['varetc_path']}/mpd-vpn/mpd.secret");
|
|
405
|
}
|
|
406
|
|
|
407
|
/* make sure mpd-vpn directory exists */
|
|
408
|
safe_mkdir("{$g['varetc_path']}/mpd-vpn");
|
|
409
|
|
|
410
|
switch ($pptpdcfg['mode']) {
|
|
411
|
|
|
412
|
case 'server':
|
|
413
|
|
|
414
|
/* write mpd.conf */
|
|
415
|
$fd = fopen("{$g['varetc_path']}/mpd-vpn/mpd.conf", "w");
|
|
416
|
if (!$fd) {
|
|
417
|
printf("Error: cannot open mpd.conf in vpn_pptpd_configure().\n");
|
|
418
|
return 1;
|
|
419
|
}
|
|
420
|
|
|
421
|
$mpdconf = <<<EOD
|
|
422
|
pptpd:
|
|
423
|
|
|
424
|
EOD;
|
|
425
|
|
|
426
|
for ($i = 0; $i < $g['n_pptp_units']; $i++) {
|
|
427
|
$mpdconf .= " load pt{$i}\n";
|
|
428
|
}
|
|
429
|
|
|
430
|
for ($i = 0; $i < $g['n_pptp_units']; $i++) {
|
|
431
|
|
|
432
|
$clientip = long2ip(ip2long($pptpdcfg['remoteip']) + $i);
|
|
433
|
$ngif = "ng" . ($i+1);
|
|
434
|
|
|
435
|
$mpdconf .= <<<EOD
|
|
436
|
|
|
437
|
pt{$i}:
|
|
438
|
new -i {$ngif} pt{$i} pt{$i}
|
|
439
|
set ipcp ranges {$pptpdcfg['localip']}/32 {$clientip}/32
|
|
440
|
load pts
|
|
441
|
|
|
442
|
EOD;
|
|
443
|
}
|
|
444
|
|
|
445
|
$mpdconf .= <<<EOD
|
|
446
|
|
|
447
|
pts:
|
|
448
|
set iface disable on-demand
|
|
449
|
set iface enable proxy-arp
|
|
450
|
set iface enable tcpmssfix
|
|
451
|
set iface idle 1800
|
|
452
|
set iface up-script /usr/local/sbin/vpn-linkup
|
|
453
|
set iface down-script /usr/local/sbin/vpn-linkdown
|
|
454
|
set bundle enable multilink
|
|
455
|
set bundle enable crypt-reqd
|
|
456
|
set link yes acfcomp protocomp
|
|
457
|
set link no pap chap
|
|
458
|
set link enable chap-msv2
|
|
459
|
set link mtu 1460
|
|
460
|
set link keep-alive 10 60
|
|
461
|
set ipcp yes vjcomp
|
|
462
|
set bundle enable compression
|
|
463
|
set ccp yes mppc
|
|
464
|
set ccp yes mpp-e128
|
|
465
|
set ccp yes mpp-stateless
|
|
466
|
|
|
467
|
EOD;
|
|
468
|
|
|
469
|
if (!isset($pptpdcfg['req128'])) {
|
|
470
|
$mpdconf .= <<<EOD
|
|
471
|
set ccp yes mpp-e40
|
|
472
|
set ccp yes mpp-e56
|
|
473
|
|
|
474
|
EOD;
|
|
475
|
}
|
|
476
|
|
|
477
|
if (isset($config['dnsmasq']['enable'])) {
|
|
478
|
$mpdconf .= " set ipcp dns " . $config['interfaces']['lan']['ipaddr'];
|
|
479
|
if ($syscfg['dnsserver'][0])
|
|
480
|
$mpdconf .= " " . $syscfg['dnsserver'][0];
|
|
481
|
$mpdconf .= "\n";
|
|
482
|
} else if (is_array($syscfg['dnsserver']) && ($syscfg['dnsserver'][0])) {
|
|
483
|
$mpdconf .= " set ipcp dns " . join(" ", $syscfg['dnsserver']) . "\n";
|
|
484
|
}
|
|
485
|
|
|
486
|
if (isset($pptpdcfg['radius']['enable'])) {
|
|
487
|
$mpdconf .= <<<EOD
|
|
488
|
set radius server {$pptpdcfg['radius']['server']} "{$pptpdcfg['radius']['secret']}"
|
|
489
|
set radius retries 3
|
|
490
|
set radius timeout 10
|
|
491
|
set bundle enable radius-auth
|
|
492
|
set bundle disable radius-fallback
|
|
493
|
|
|
494
|
EOD;
|
|
495
|
|
|
496
|
if (isset($pptpdcfg['radius']['accounting'])) {
|
|
497
|
$mpdconf .= <<<EOD
|
|
498
|
set bundle enable radius-acct
|
|
499
|
|
|
500
|
EOD;
|
|
501
|
}
|
|
502
|
}
|
|
503
|
|
|
504
|
fwrite($fd, $mpdconf);
|
|
505
|
fclose($fd);
|
|
506
|
|
|
507
|
/* write mpd.links */
|
|
508
|
$fd = fopen("{$g['varetc_path']}/mpd-vpn/mpd.links", "w");
|
|
509
|
if (!$fd) {
|
|
510
|
printf("Error: cannot open mpd.links in vpn_pptpd_configure().\n");
|
|
511
|
return 1;
|
|
512
|
}
|
|
513
|
|
|
514
|
$mpdlinks = "";
|
|
515
|
|
|
516
|
for ($i = 0; $i < $g['n_pptp_units']; $i++) {
|
|
517
|
$mpdlinks .= <<<EOD
|
|
518
|
|
|
519
|
pt{$i}:
|
|
520
|
set link type pptp
|
|
521
|
set pptp enable incoming
|
|
522
|
set pptp disable originate
|
|
523
|
set pptp disable windowing
|
|
524
|
set pptp self 127.0.0.1
|
|
525
|
|
|
526
|
EOD;
|
|
527
|
}
|
|
528
|
|
|
529
|
fwrite($fd, $mpdlinks);
|
|
530
|
fclose($fd);
|
|
531
|
|
|
532
|
/* write mpd.secret */
|
|
533
|
$fd = fopen("{$g['varetc_path']}/mpd-vpn/mpd.secret", "w");
|
|
534
|
if (!$fd) {
|
|
535
|
printf("Error: cannot open mpd.secret in vpn_pptpd_configure().\n");
|
|
536
|
return 1;
|
|
537
|
}
|
|
538
|
|
|
539
|
$mpdsecret = "";
|
|
540
|
|
|
541
|
if (is_array($pptpdcfg['user'])) {
|
|
542
|
foreach ($pptpdcfg['user'] as $user)
|
|
543
|
$mpdsecret .= "{$user['name']} \"{$user['password']}\" {$user['ip']}\n";
|
|
544
|
}
|
|
545
|
|
|
546
|
fwrite($fd, $mpdsecret);
|
|
547
|
fclose($fd);
|
|
548
|
chmod("{$g['varetc_path']}/mpd-vpn/mpd.secret", 0600);
|
|
549
|
|
|
550
|
/* fire up mpd */
|
|
551
|
mwexec("/usr/local/sbin/mpd -b -d {$g['varetc_path']}/mpd-vpn -p {$g['varrun_path']}/mpd-vpn.pid pptpd");
|
|
552
|
|
|
553
|
break;
|
|
554
|
|
|
555
|
case 'redir':
|
|
556
|
break;
|
|
557
|
}
|
|
558
|
|
|
559
|
if ($g['booting'])
|
|
560
|
echo "done.\n";
|
|
561
|
else
|
|
562
|
filter_configure();
|
|
563
|
|
|
564
|
return 0;
|
|
565
|
}
|
|
566
|
|
|
567
|
function vpn_localnet_determine($adr, &$sa, &$sn) {
|
|
568
|
global $config, $g;
|
|
569
|
|
|
570
|
if (isset($adr)) {
|
|
571
|
if ($adr['network']) {
|
|
572
|
switch ($adr['network']) {
|
|
573
|
case 'lan':
|
|
574
|
$sn = $config['interfaces']['lan']['subnet'];
|
|
575
|
$sa = gen_subnet($config['interfaces']['lan']['ipaddr'], $sn);
|
|
576
|
break;
|
|
577
|
}
|
|
578
|
} else if ($adr['address']) {
|
|
579
|
list($sa,$sn) = explode("/", $adr['address']);
|
|
580
|
if (is_null($sn))
|
|
581
|
$sn = 32;
|
|
582
|
}
|
|
583
|
} else {
|
|
584
|
$sn = $config['interfaces']['lan']['subnet'];
|
|
585
|
$sa = gen_subnet($config['interfaces']['lan']['ipaddr'], $sn);
|
|
586
|
}
|
|
587
|
}
|
|
588
|
|
|
589
|
function vpn_endpoint_determine($tunnel, $curwanip) {
|
|
590
|
|
|
591
|
global $g, $config;
|
|
592
|
|
|
593
|
if ((!$tunnel['interface']) || ($tunnel['interface'] == "wan")) {
|
|
594
|
if ($curwanip)
|
|
595
|
return $curwanip;
|
|
596
|
else
|
|
597
|
return null;
|
|
598
|
} else if ($tunnel['interface'] == "lan") {
|
|
599
|
return $config['interfaces']['lan']['ipaddr'];
|
|
600
|
} else {
|
|
601
|
$oc = $config['interfaces'][$tunnel['interface']];
|
|
602
|
|
|
603
|
if (isset($oc['enable']) && $oc['if']) {
|
|
604
|
return $oc['ipaddr'];
|
|
605
|
}
|
|
606
|
}
|
|
607
|
|
|
608
|
return null;
|
|
609
|
}
|
|
610
|
|
|
611
|
?>
|