From f92d86eff5e525ac55ac396a0ca0341d92aa0365 Mon Sep 17 00:00:00 2001
From: Fernando Lemos <fernandotcl@pfsense.org>
Date: Tue, 5 Sep 2006 14:55:17 +0000
Subject: New Squid stuff, to be backported or whatever.

---
 packages/squid-head/squid.inc | 841 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 841 insertions(+)
 create mode 100644 packages/squid-head/squid.inc

(limited to 'packages/squid-head/squid.inc')

diff --git a/packages/squid-head/squid.inc b/packages/squid-head/squid.inc
new file mode 100644
index 00000000..c28fccc1
--- /dev/null
+++ b/packages/squid-head/squid.inc
@@ -0,0 +1,841 @@
+<?php
+require_once('globals.inc');
+require_once('config.inc');
+require_once('util.inc');
+require_once('pfsense-utils.inc');
+require_once('pkg-utils.inc');
+require_once('filter.inc');
+require_once('service-utils.inc');
+
+define('RC_BASE', '/usr/local/etc/rc.d');
+define('SQUID_CONFBASE', '/usr/local/etc/squid');
+define('SQUID_LOGDIR', '/var/squid/log');
+define('SQUID_CACHEDIR', '/var/squid/cache');
+define('SQUID_ACLDIR', '/var/squid/acl');
+define('SQUID_PASSWD', '/var/etc/squid.passwd');
+define('MSNTAUTH_CONF', '/usr/local/etc/squid/msntauth.conf');
+
+$valid_acls = array();
+
+
+function squid_get_real_interface_address($iface) {
+	global $config;
+
+	$iface = convert_friendly_interface_to_real_interface_name($iface);
+	$line = trim(shell_exec("ifconfig $iface | grep inet | grep -v inet6"));
+	list($dummy, $ip, $dummy2, $netmask) = explode(' ', $line);
+
+	return array($ip, long2ip(hexdec($netmask)));
+}
+
+function squid_chown_recursive($dir, $user, $group) {
+	chown($dir, $user);
+	chgrp($dir, $group);
+	$handle = opendir($dir) ;
+	while (($item = readdir($handle)) !== false) {
+		if (($item != ".") && ($item != "..")) {
+			$path = "$dir/$item";
+			if (is_dir($path))
+				squid_chown_recursive($path, $user, $group);
+			else {
+				chown($path, $user);
+				chgrp($path, $group);
+			}
+		}
+	}
+}
+
+function squid_is_valid_acl($acl) {
+	global $valid_acls;
+
+	return in_array($acl, $valid_acls);
+}
+
+function squid_install_command() {
+	/* Create cache */
+	update_output_window('Initializing cache... This may take a moment...');
+	mwexec('/usr/local/sbin/squid -z');
+
+	$rc = array();
+	$rc['file'] = 'squid.sh';
+	$rc['start'] = '/usr/local/sbin/squid -D';
+	$rc['stop'] = RC_BASE . "/proxy_monitor.sh stop\n";
+	$rc['stop'] .= <<<EOD
+/usr/local/sbin/squid -k shutdown
+# Just to be sure...
+killall squid 2>/dev/null
+sleep 1
+killall squid 2>/dev/null
+
+EOD;
+	$rc['restart'] = <<<EOD
+if [ -z "`pgrep squid`" ]; then
+		/usr/local/sbin/squid -D
+	else
+		/usr/local/sbin/squid -k reconfigure
+	fi
+
+EOD;
+	write_rcfile($rc);
+
+	$rc = array();
+	$rc['file'] = 'proxy_monitor.sh';
+	$rc['start'] = '/usr/local/bin/squid_monitor.sh';
+	$rc['stop'] = 'killall squid_monitor.sh';
+	write_rcfile($rc);
+
+	foreach (array(	SQUID_CONFBASE,
+			SQUID_LOGDIR,
+			SQUID_ACLDIR,
+	) as $dir) {
+			make_dirs($dir);
+			squid_chown_recursive($dir, 'proxy', 'proxy');
+	}
+
+	restart_service('squid');
+	sleep(1);
+	restart_service('proxy_monitor');
+
+	if (!file_exists(SQUID_CONFBASE . '/mime.conf')	&& file_exists(SQUID_CONFBASE . '/mime.conf.default'))
+		copy(SQUID_CONFBASE . '/mime.conf.default', SQUID_CONFBASE . '/mime.conf');
+}
+
+function squid_deinstall_command() {
+	stop_service('proxy_monitor');
+	stop_service('squid');
+
+	filter_configure();
+
+	mwexec('rm -rf ' . SQUID_CACHEDIR);
+}
+
+function squid_before_form_general($pkg) {
+	$values = get_dir(SQUID_CONFBASE . '/errors/');
+	// Get rid of '..' and '.'
+	array_shift($values);
+	array_shift($values);
+	$name = array();
+	foreach ($values as $value)
+		$names[] = implode(' ', explode('_', $value));
+
+	$i = 0;
+	foreach ($pkg['fields']['field'] as $field) {
+		if ($field['fieldname'] == 'error_language')
+			break;
+		$i++;
+	}
+	$field = &$pkg['fields']['field'][$i];
+
+	for ($i = 0; $i < count($values) - 1; $i++)
+		$field['options']['option'][] = array('name' => $names[$i], 'value' => $values[$i]);
+}
+
+function squid_validate_general($post, $input_errors) {
+	$icp_port = trim($post['icp_port']);
+	if (!empty($icp_port) && !is_port($icp_port))
+		$input_errors[] = 'You must enter a valid port number in the \'ICP port\' field';
+
+	$children = $post['redirect_children'];
+	if (!empty($children) && !is_numeric($children))
+		$input_errors[] = 'You must enter a valid number for the \'Redirect children\' field';
+}
+
+function squid_validate_upstream($post, $input_errors) {
+	if ($post['proxy_forwarding'] == 'on') {
+		$addr = trim($post['proxy_addr']);
+		if (empty($addr))
+			$input_errors[] = 'The field \'Hostname\' is required';
+		else {
+			if (!is_ipaddr($addr) && !is_domain($addr))
+				$input_errors[] = 'You must enter a valid IP address or host name in the \'Proxy hostname\' field';
+		}
+
+		foreach (array('proxy_port' => 'TCP port', 'icp_port' => 'ICP port') as $field => $name) {
+			$port = trim($post[$field]);
+			if (empty($port))
+				$input_errors[] = "The field '$name' is required";
+			else {
+					if (!is_port($port))
+					$input_errors[] = "The field '$name' must contain a valid port number, between 0 and 65535";
+			}
+		}
+	}
+}
+
+function squid_validate_cache($post, $input_errors) {
+	$num_fields = array(	'harddisk_cache_size' => 'Hard disk cache size',
+				'memory_cache_size' => 'Memory cache size',
+				'maximum_object_size' => 'Maximum object size',
+	);
+	foreach ($num_fields as $field => $name) {
+		$value = trim($post[$field]);
+		if (!is_numeric($value) || ($value < 1))
+			$input_errors[] = "You must enter a valid value for '$field'";
+	}
+
+	$value = trim($post['minimum_object_size']);
+	if (!is_numeric($value) || ($value < 0))
+		$input_errors[] = 'You must enter a valid value for \'Minimum object size\'';
+
+	foreach (explode(',', $post['donotcache']) as $host) {
+		$host = trim($host);
+		if (!is_ipaddr($host) && !is_domain($host))
+			$input_errors[] = "$host is not a valid IP or host name";
+	}
+}
+
+function squid_validate_nac($post, $input_errors) {
+	$allowed_subnets = explode(',', trim($post['allowed_subnets']));
+	foreach ($allowed_subnets as $subnet) {
+		$subnet = trim($subnet);
+		if (!is_subnet($subnet))
+			$input_errors[] = "'$subnet' is not a valid CIDR range";
+	}
+
+	foreach (array(	'unrestricted_hosts',
+			'banned_hosts',
+			'whitelist',
+			'blacklist',
+	) as $hosts) {
+		foreach (explode(',', $post[$hosts]) as $host) {
+			$host = trim($host);
+			if (!empty($host) && !is_ipaddr($host))
+				$input_errors[] = "'$host' is not a valid IP address";
+		}
+	}
+
+	foreach (array('unrestricted_macs', 'banned_macs') as $macs) {
+		foreach (explode(',', $post[$macs]) as $mac) {
+			$mac = trim($mac);
+			if (!empty($mac) && !is_macaddr($mac))
+				$input_errors[] = "'$mac' is not a valid MAC address";
+		}
+	}
+
+	foreach (explode(',', $post['timelist']) as $time) {
+		$time = trim($time);
+		if (!empty($time) && !squid_is_timerange($time))
+			$input_errors[] = "'$time' is not a valid time range";
+	}
+}
+
+function squid_validate_traffic($post, $input_errors) {
+	$num_fields = array(	'max_download_size' => 'Maximum download size',
+				'max_upload_size' => 'Maximum upload size',
+				'perhost_throttling' => 'Per-host bandwidth throttling',
+				'overall_throttling' => 'Overall bandwidth throttling',
+	);
+	foreach ($num_fields as $field => $name) {
+		$value = trim($post[$field]);
+		if (!is_numeric($value) || ($value < 0))
+			$input_errors[] = "The field '$name' must contain a positive number";
+	}
+}
+
+function squid_validate_auth($post, $input_errors) {
+	$num_fields = array(	array('auth_processes', 'Authentication processes', 1),
+				array('auth_ttl', 'Authentication TTL', 0),
+	);
+	foreach ($num_fields as $field) {
+		$value = trim($post[$field[0]]);
+		if (!empty($value) && (!is_numeric($value) || ($value < $field[2])))
+			$input_errors[] = "The field '{$field[1]}' must contain a valid number greater than {$field[2]}";
+	}
+
+	$auth_method = $post['auth_method'];
+	if (($auth_method != 'none') && ($auth_method != 'local')) {
+		$server = trim($post['auth_server']);
+		if (empty($server))
+			$input_errors[] = 'The field \'Authentication server\' is required';
+		else if (!is_ipaddr($server) && !is_domain($server))
+			$input_errors[] = 'The field \'Authentication server\' must contain a valid IP address or domain name';
+
+		$port = trim($post['auth_server_port']);
+		if (!empty($port) && !is_port($port))
+			$input_errors[] = 'The field \'Authentication server port\' must contain a valid port number';
+
+		switch ($auth_method) {
+			case 'ldap':
+				$required = array(
+					'ldap_basedn' => 'LDAP base DN',
+					'ldap_filter' => 'LDAP filter',
+				);
+				foreach ($required as $field => $descr) {
+					$value = trim($post[$field]);
+					if (empty($value))
+						$input_errors[] = "The field '$descr' is required";
+				}
+
+				$user = trim($post['ldap_user']);
+				$password = trim($post['ldap_password']);
+				if (!empty($password) && empty($user))
+					$input_errors[] = 'You must specify an username if you specify a password';
+
+				break;
+			case 'radius':
+				$secret = trim($post['radius_secret']);
+				if (empty($secret))
+					$input_errors[] = 'The field \'RADIUS secret\' is required';
+				break;
+			case 'msnt':
+				$bdc = $post['msnt_bdc'];
+				if (!empty($bdc) && !is_ipaddr($bdc) && !is_domain($bdc))
+					$input_errors[] = "'$bdc' isn't a valid IP address or domain name";
+				$domain = $post['msnt_domain'];
+				if (empty($domain) || !is_domain($domain))
+					$input_errors[] = 'You must enter a valid domain name in the \'NT domain\' field';
+				break;
+		}
+
+		$no_auth = explode(',', trim($post['no_auth_hosts']));
+		foreach ($no_auth as $host) {
+			$host = trim($host);
+			if (!empty($host) && !is_subnet($host))
+				$input_errors[] = "'$host' isn't a valid CIDR range";
+		}
+	}
+}
+
+function squid_resync_general() {
+	global $g, $config, $valid_acls;
+
+	$settings = $config['installedpackages']['squid']['config'][0];
+	$conf = '';
+
+	if ($settings['transparent_proxy'] == 'on') {
+		$conf .= <<<EOD
+httpd_accel_host virtual
+httpd_accel_port 80
+httpd_accel_with_proxy on
+httpd_accel_uses_host_header on
+
+EOD;
+	}
+
+	$port = $settings['proxy_port'] ? $settings['proxy_port'] : 3128;
+	$ifaces = $settings['active_interface'] ? $settings['active_interface'] : 'lan';
+	$real_ifaces = array();
+	foreach (explode(',', $ifaces) as $i => $iface) {
+		$real_ifaces[] = squid_get_real_interface_address($iface);
+		if (!empty($real_ifaces[$i][0]))
+			$conf .= "http_port {$real_ifaces[$i][0]}:$port\n";
+	}
+
+	$icp_port = $settings['icp_port'] ? $settings['icp_port'] : 0;
+
+	$pidfile = "{$g['varrun_path']}/squid.pid";
+	$language = $settings['error_language'] ? $settings['error_language'] : 'English';
+	$errordir = SQUID_CONFBASE . '/errors/' . $language;
+	$hostname = $settings['visible_hostname'] ? $settings['visible_hostname'] : 'localhost';
+	$email = $settings['admin_email'] ? $settings['admin_email'] : 'admin@localhost';
+
+	$logdir_cache = SQUID_LOGDIR . '/cache.log';
+	$logdir_access = $settings['log_enabled'] == 'on' ? SQUID_LOGDIR . '/access.log' : '/dev/null';
+
+	$conf .= <<<EOD
+icp_port $icp_port
+
+pid_filename $pidfile
+cache_effective_user proxy
+cache_effective_group proxy
+error_directory $errordir
+visible_hostname $hostname
+cache_mgr $email
+
+cache_access_log $logdir_access
+cache_log $logdir_cache
+cache_store_log none
+
+EOD;
+
+	if ($settings['allow_interface'] == 'on') {
+		$src = '';
+		foreach ($real_ifaces as $iface) {
+			list($ip, $mask) = $iface;
+			$ip = long2ip(ip2long($ip) & ip2long($mask));
+			$src .= " $ip/$mask";
+		}
+		$conf .= "acl localnet src $src\n";
+		$valid_acls[] = 'localnet';
+	}
+
+	restart_service('proxy_monitor');
+
+	return $conf;
+}
+
+function squid_resync_cache() {
+	global $config;
+
+	$settings = $config['installedpackages']['squidcache']['config'][0];
+
+	$cachedir = SQUID_CACHEDIR;
+	$disk_cache_size = $settings['harddisk_cache_size'] ? $settings['harddisk_cache_size'] : 100;
+	$level1 = $settings['level1_subdirs'] ? $settings['level1_subdirs'] : 16;
+	$memory_cache_size = $settings['memory_cache_size'] ? $settings['memory_cache_size'] : 8;
+	$max_objsize = $settings['maximum_object_size'] ? $settings['maximum_object_size'] : 4;
+	$min_objsize = $settings['minimum_object_size'] ? $settings['minimum_object_size'] : 0;
+	$cache_policy = $settings['cache_replacement_policy'] ? $settings['cache_replacement_policy'] : 'heap LFUDA';
+	$memory_policy = $settings['memory_replacement_policy'] ? $settings['memory_replacement_policy'] : 'heap GSDF';
+	$offline_mode = $settings['enable_offline'] == 'on' ? 'on' : 'off';
+
+	$conf = <<<EOD
+cache_dir diskd $cachedir $disk_cache_size $level1 256
+cache_mem $memory_cache_size MB
+maximum_object_size $max_objsize KB
+minimum_object_size $min_objsize KB
+cache_replacement_policy $cache_policy
+memory_replacement_policy $memory_policy
+offline_mode $offline_mode
+
+EOD;
+
+	$donotcache = trim(implode("\n", array_map('trim', explode(',', $settings['donotcache']))));
+	if (!empty($donotcache)) {
+		file_put_contents(SQUID_ACLDIR . '/donotcache.acl', $donotcache);
+		$conf .= 'acl donotcache dstdomain "' . SQUID_ACLDIR . "/donotcache.acl\"\n";
+		$conf .= 'no_cache deny donotcache';
+	}
+
+	return $conf;
+}
+
+function squid_resync_upstream() {
+	global $config;
+	$settings = $config['installedpackages']['squidupstream']['config'][0];
+
+	$conf = '';
+	if ($settings['proxy_forwarding'] == 'on') {
+		$conf .= "cache_peer {$settings['proxy_addr']} parent {$settings['proxy_port']} {$settings['icp_port']} ";
+
+		if (!empty($settings['username']))
+			$conf .= " login={$settings['username']}";
+		if (!empty($settings['password']))
+			$conf .= ":{$settings['password']}";
+	}
+
+	return $conf;
+}
+
+function squid_resync_redirector() {
+	global $config;
+
+	$httpav_enabled = $config['installedpackages']['clamav']['config'][0]['scan_http'] == 'on';
+	if ($httpav_enabled)
+		return ('redirect_program /usr/local/bin/squirm');
+	return '# No redirector configured';
+}
+
+function squid_resync_nac() {
+	global $config, $valid_acls;
+
+	$settings = $config['installedpackages']['squidnac']['config'][0];
+
+	$conf = <<<EOD
+acl all src 0.0.0.0/0
+acl localhost src 127.0.0.1
+acl safeports port 21 70 80 210 280 443 488 563 591 631 777 901 1025-65535
+acl sslports port 443 563
+acl manager proto cache_object
+acl purge method PURGE
+acl connect method CONNECT
+acl dynamic urlpath_regex cgi-bin \?
+
+EOD;
+
+	$allowed = implode(' ', array_map('trim', explode(',', $settings['allowed_subnets'])));
+	if (!empty($allowed)) {
+		$conf .= "acl allowed_subnets src $allowed\n";
+		$valid_acls[] = 'allowed_subnets';
+	}
+
+	$options = array(	'unrestricted_hosts' => 'src',
+				'unrestricted_macs' => 'arp',
+				'banned_hosts' => 'src',
+				'banned_macs' => 'arp',
+				'whitelist' => 'url_regex -i',
+				'blacklist' => 'url_regex -i',
+	);
+	foreach ($options as $option => $directive) {
+		$contents = trim(implode("\n", array_map('trim', explode(',', $settings[$option]))));
+		if (!empty($contents)) {
+			file_put_contents(SQUID_ACLDIR . "/$option.acl", $contents);
+			$conf .= "acl $option $directive \"" . SQUID_ACLDIR . "/$option.acl\"\n";
+			$valid_acls[] = $option;
+		}
+	}
+
+	$conf .= <<<EOD
+no_cache deny dynamic
+http_access allow manager localhost
+http_access deny manager
+http_access allow purge localhost
+http_access deny purge
+http_access deny !safeports
+http_access deny CONNECT !sslports
+
+http_access allow localhost
+
+EOD;
+
+	return $conf;
+}
+
+function squid_resync_traffic() {
+	global $config, $valid_acls;
+
+	$settings = $config['installedpackages']['squidtraffic']['config'][0];
+	$conf = '';
+
+	$up_limit = $settings['max_upload_size'] ? $settings['max_upload_size'] : 0;
+	$down_limit = $settings['max_download_size'] ? $settings['max_download_size'] : 0;
+	$conf .= "request_body_max_size $up_limit KB\n";
+	$conf .= 'reply_body_max_size ' . ($down_limit * 1024) . " allow all\n";
+
+	// Only apply throttling past 10MB
+	// XXX: Should this really be hardcoded?
+	$threshold = 10 * 1024 * 1024;
+	$overall = $settings['overall_throttling'];
+	if (!isset($overall) || ($overall == 0))
+		$overall = -1;
+	else
+		$overall *= 1024;
+	$perhost = $settings['perhost_throttling'];
+	if (!isset($perhost) || ($perhost == 0))
+		$perhost = -1;
+	else
+		$perhost *= 1024;
+	$conf .= <<<EOD
+delay_pools 1
+delay_class 1 2
+delay_parameters 1 $overall/$threshold $perhost/$threshold
+delay_initial_bucket_level 100%
+
+EOD;
+
+	foreach (array('unrestricted_hosts', 'unrestricted_macs') as $item) {
+		if (in_array($item, $valid_acls))
+			$conf .= "delay_access 1 deny $item\n";
+	}
+
+	if ($settings['throttle_specific'] == 'on') {
+		$exts = array();
+		$binaries = 'bin,cab,sea,ar,arj,tar,tgz,gz,tbz,bz2,zip,exe,com';
+		$cdimages = 'iso,bin,mds,nrg,gho,bwt,b5t,pqi';
+		$multimedia = 'aiff?,asf,avi,divx,mov,mp3,mp4,mpe?g,qt,ra?m';
+		foreach (array(	'throttle_binaries' => $binaries,
+				'throttle_cdimages' => $cdimages,
+				'throttle_multimedia' => $multimedia) as $field => $set) {
+			if ($settings[$field] == 'on')
+				$exts = array_merge($exts, explode(',', $set));
+		}
+
+		foreach (explode(',', $settings['throttle_others']) as $ext) {
+			if (!empty($ext)) $exts[] = $ext;
+		}
+
+		$contents = '';
+		foreach ($exts as $ext)
+			$contents .= "\.$ext\$\n";
+		file_put_contents(SQUID_ACLDIR . '/throttle_exts.acl', $contents);
+
+		$conf .= 'acl throttle_exts url_regex -i "' . SQUID_ACLDIR . '/throttle_exts.acl"';
+		$conf .= "delay_access 1 allow throttle_exts\n";
+		$conf .= "delay_access 1 deny all\n";
+	}
+	else
+		$conf .= "delay_access 1 allow all\n";
+
+	return $conf;
+}
+
+function squid_resync_auth() {
+	global $config, $valid_acls;
+
+	$settings = $config['installedpackages']['squidauth']['config'][0];
+	$conf = '';
+
+	// Deny the banned guys before allowing the good guys
+	$banned = array(	'banned_hosts',
+				'banned_macs',
+	);
+	$banned = array_filter($banned, 'squid_is_valid_acl');
+	foreach ($banned as $acl)
+			$conf .= "http_access deny $acl\n";
+
+	// Whitelist and blacklist also take precendence
+	if (squid_is_valid_acl('whitelist'))
+		$conf .= "http_access allow whitelist\n";
+	if (squid_is_valid_acl('blacklist'))
+		$conf .= "http_access deny blacklist\n";
+
+	$transparent_proxy = $config['installedpackages']['squid']['config'][0]['transparent_proxy'] == 'on';
+	$auth_method = ($settings['auth_method'] && !$transparent_proxy) ? $settings['auth_method'] : 'none';
+
+	// Allow the remaining ACLs if no authentication is set
+	if ($auth_method == 'none') {
+		$allowed = array('localnet', 'allowed_subnets', 'unrestricted_hosts', 'unrestricted_macs');
+		$allowed = array_filter($allowed, 'squid_is_valid_acl');
+		foreach ($allowed as $acl)
+			$conf .= "http_access allow $acl\n";
+	}
+
+	else {
+		$noauth = implode(' ', array_map('trim', explode(',', $settings['no_auth_hosts'])));
+		if (!empty($noauth)) {
+			$conf .= "acl noauth src $noauth\n";
+			$valid_acls[] = 'noauth';
+		}
+
+		// Set up the external authentication programs
+		$auth_ttl = $settings['auth_ttl'] ? $settings['auth_ttl'] : 60;
+		$processes = $settings['auth_processes'] ? $settings['auth_processes'] : 5;
+		$prompt = $settings['auth_prompt'] ? $settings['auth_prompt'] : 'Please enter your credentials to access the proxy';
+		switch ($auth_method) {
+			case 'local':
+				$conf .= 'auth_param basic program /usr/local/libexec/squid/ncsa_auth ' . SQUID_PASSWD . "\n";
+				break;
+			case 'ldap':
+				$port = isset($settings['auth_port']) ? ":{$settings['auth_port']}" : '';
+				$user = isset($settings['ldap_user']) ? "-D {$settings['ldap_user']}" : '';
+				$password = isset($settings['ldap_password']) ? "-w '{$settings['ldap_password']}'" : '';
+				$filter = isset($settings['ldap_filter']) ? "-f '{$settings['ldap_filter']}'" : '';
+				$conf .= "auth_param basic program /usr/local/libexec/squid/squid_ldap_auth -b {$settings['ldap_basedn']} $user $password $filter {$settings['auth_server']}$port\n";
+				break;
+			case 'radius':
+				$port = isset($settings['auth_port']) ? "-p {$settings['auth_server_port']}" : '';
+				$conf .= "auth_param basic program /usr/local/libexec/squid/squid_radius_auth -w {$settings['radius_secret']} -h {$settings['auth_server']} $port\n";
+				break;
+			case 'msnt':
+				$conf .= "auth_param basic program /usr/local/libexec/squid/msnt_auth\n";
+
+				$bdc = trim($settings['msnt_bdc']);
+				if (empty($bdc)) $bdc = $settings['auth_server'];
+				$msntauth_conf = "server {$settings['auth_server']} $bdc {$settings['msnt_domain']}\n";
+				file_put_contents(MSNTAUTH_CONF, $msntauth_conf);
+
+				break;
+		}
+		$conf .= <<<EOD
+auth_param basic children $processes
+auth_param basic realm $prompt
+auth_param basic credentialsttl $auth_ttl minutes
+acl password proxy_auth REQUIRED
+
+EOD;
+
+		// Onto the ACLs
+		$password = array('localnet', 'allowed_subnets');
+		$passwordless = array('unrestricted_hosts', 'unrestricted_macs');
+		if ($settings['unrestricted_auth'] == 'on') {
+			// Even the unrestricted hosts should authenticate
+			$password = array_merge($password, $passwordless);
+			$passwordless = array();
+		}
+		$passwordless[] = 'noauth';
+		$password = array_filter($password, 'squid_is_valid_acl');
+		$passwordless = array_filter($passwordless, 'squid_is_valid_acl');
+
+		// Allow the ACLs that don't need to authenticate
+		foreach ($passwordless as $acl)
+			$conf .= "http_access allow $acl\n";
+
+		// Allow the other ACLs as long as they authenticate
+		foreach ($password as $acl)
+			$conf .= "http_access allow password $acl\n";
+	}
+
+
+	$conf .= "http_access deny all\n";
+
+	return $conf;
+}
+
+function squid_resync_users() {
+	global $config;
+
+	$users = $config['installedpackages']['squidusers']['config'];
+	$contents = '';
+	if (is_array($users)) {
+		foreach ($users as $user)
+			$contents .= $user['username'] . ':' . crypt($user['password'], base64_encode($user['password'])) . "\n";
+	}
+	file_put_contents(SQUID_PASSWD, $contents);
+	chown(SQUID_PASSWD, 'proxy');
+	chmod(SQUID_PASSWD, 0600);
+}
+
+function squid_resync() {
+	$conf = squid_resync_general() . "\n";
+	$conf .= squid_resync_cache() . "\n";
+	$conf .= squid_resync_redirector() . "\n";
+	$conf .= squid_resync_upstream() . "\n";
+	$conf .= squid_resync_nac() . "\n";
+	$conf .= squid_resync_traffic() . "\n";
+	$conf .= squid_resync_auth();
+	squid_resync_users();
+
+	file_put_contents(SQUID_CONFBASE . '/squid.conf', $conf);
+
+	if (!is_dir(SQUID_CACHEDIR)) {
+		log_error(SQUID_CACHEDIR  . ' does not exist. Creating.');
+		mwexec('/usr/local/sbin/squid -z');
+	}
+
+	restart_service('squid');
+	sleep(1);
+	restart_service('proxy_monitor');
+
+	filter_configure();
+}
+
+function squid_print_javascript_auth() {
+	global $config;
+	$transparent_proxy = $config['installedpackages']['squid']['config'][0]['transparent_proxy'] == 'on';
+
+	// No authentication for transparent proxy
+	if ($transparent_proxy) {
+		$javascript = <<<EOD
+<script language="JavaScript">
+<!--
+function on_auth_method_changed() {
+	document.iform.auth_method.disabled = 1;
+	document.iform.auth_server.disabled = 1;
+	document.iform.auth_server_port.disabled = 1;
+	document.iform.ldap_user.disabled = 1;
+	document.iform.ldap_password.disabled = 1;
+	document.iform.ldap_basedn.disabled = 1;
+	document.iform.ldap_filter.disabled = 1;
+	document.iform.radius_secret.disabled = 1;
+	document.iform.msnt_bdc.disabled = 1;
+	document.iform.msnt_domain.disabled = 1;
+	document.iform.auth_prompt.disabled = 1;
+	document.iform.auth_processes.disabled = 1;
+	document.iform.auth_ttl.disabled = 1;
+	document.iform.unrestricted_auth.disabled = 1;
+	document.iform.no_auth_hosts.disabled = 1;
+}
+-->
+</script>
+
+EOD;
+	}
+	else {
+		$javascript = <<<EOD
+<script language="JavaScript">
+<!--
+function on_auth_method_changed() {
+	var field = document.iform.auth_method;
+	var auth_method = field.options[field.selectedIndex].value;
+
+	if (auth_method == 'none') {
+		document.iform.auth_server.disabled = 1;
+		document.iform.auth_server_port.disabled = 1;
+		document.iform.ldap_user.disabled = 1;
+		document.iform.ldap_password.disabled = 1;
+		document.iform.ldap_basedn.disabled = 1;
+		document.iform.ldap_filter.disabled = 1;
+		document.iform.radius_secret.disabled = 1;
+		document.iform.msnt_bdc.disabled = 1;
+		document.iform.msnt_domain.disabled = 1;
+		document.iform.auth_prompt.disabled = 1;
+		document.iform.auth_processes.disabled = 1;
+		document.iform.auth_ttl.disabled = 1;
+		document.iform.unrestricted_auth.disabled = 1;
+		document.iform.no_auth_hosts.disabled = 1;
+	}
+	else {
+		document.iform.auth_prompt.disabled = 0;
+		document.iform.auth_processes.disabled = 0;
+		document.iform.auth_ttl.disabled = 0;
+		document.iform.unrestricted_auth.disabled = 0;
+		document.iform.no_auth_hosts.disabled = 0;
+	}
+
+	switch (auth_method) {
+		case 'local':
+			document.iform.auth_server.disabled = 1;
+			document.iform.auth_server_port.disabled = 1;
+			document.iform.ldap_user.disabled = 1;
+			document.iform.ldap_password.disabled = 1;
+			document.iform.ldap_basedn.disabled = 1;
+			document.iform.ldap_filter.disabled = 1;
+			document.iform.radius_secret.disabled = 1;
+			document.iform.msnt_bdc.disabled = 1;
+			document.iform.msnt_domain.disabled = 1;
+			break;
+		case 'ldap':
+			document.iform.auth_server.disabled = 0;
+			document.iform.auth_server_port.disabled = 0;
+			document.iform.ldap_user.disabled = 0;
+			document.iform.ldap_password.disabled = 0;
+			document.iform.ldap_basedn.disabled = 0;
+			document.iform.ldap_filter.disabled = 0;
+			document.iform.radius_secret.disabled = 1;
+			document.iform.msnt_bdc.disabled = 1;
+			document.iform.msnt_domain.disabled = 1;
+			break;
+		case 'radius':
+			document.iform.auth_server.disabled = 0;
+			document.iform.auth_server_port.disabled = 0;
+			document.iform.ldap_user.disabled = 1;
+			document.iform.ldap_password.disabled = 1;
+			document.iform.ldap_basedn.disabled = 1;
+			document.iform.ldap_filter.disabled = 1;
+			document.iform.radius_secret.disabled = 0;
+			document.iform.msnt_bdc.disabled = 1;
+			document.iform.msnt_domain.disabled = 1;
+			break;
+		case 'msnt':
+			document.iform.auth_server.disabled = 0;
+			document.iform.auth_server_port.disabled = 1;
+			document.iform.ldap_user.disabled = 1;
+			document.iform.ldap_password.disabled = 1;
+			document.iform.ldap_basedn.disabled = 1;
+			document.iform.ldap_filter.disabled = 1;
+			document.iform.radius_secret.disabled = 1;
+			document.iform.msnt_bdc.disabled = 0;
+			document.iform.msnt_domain.disabled = 0;
+			break;
+	}
+}
+-->
+</script>
+
+EOD;
+	}
+
+	print($javascript);
+}
+
+function squid_print_javascript_auth2() {
+	print("<script language=\"JavaScript\">on_auth_method_changed()</script>\n");
+}
+
+function squid_generate_rules($type) {
+	global $config;
+
+	$squid_conf = $config['installedpackages']['squid']['config'][0];
+	if (!is_service_running('squid') || ($squid_conf['transparent_proxy'] != 'on')) {
+		log_error('Squid is installed but not started. Not installing redirect rules.');
+		return;
+	}
+
+	$port = isset($squid_conf['proxy_port']) ? $squid_conf['proxy_port'] : 3128;
+	$ifaces = explode(',', $squid_conf['active_interface']);
+	$ifaces = array_map('convert_friendly_interface_to_real_interface_name', $ifaces);
+
+	switch($type) {
+		case 'nat':
+			foreach ($ifaces as $iface)
+				$rules .= "rdr on $iface inet proto tcp from any to !($iface) port 80 -> ($iface) port $port\n";
+			break;
+		case 'filter':
+			foreach ($ifaces as $iface)
+				$rules .= "pass quick on $iface inet proto tcp from any to !($iface) port 80 flags S/SA keep state\n";
+			break;
+	}
+
+	return $rules;
+}
+?>
-- 
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