Update squid_ng package with latest from Michael Capp <michael.capp@gmail.com>

1 files changed, 552 insertions, 0 deletions

diff --git a/packages/squid_ng.inc b/packages/squid_ng.inc
new file mode 100644
index 00000000..33845789
--- /dev/null
+++ b/packages/squid_ng.inc
@@ -0,0 +1,552 @@
+<?php
+/* $Id$ */
+
+/*
+        squid_ng.inc
+        part of pfSense (www.pfSense.com)
+
+        Copyright (C) 2005 Michael Capp <michael.capp@gmail.com>
+        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 global_write_squid_config() {
+	conf_mount_rw();
+	config_lock();
+	
+	global $config;
+				
+    /* define squid configuration file in variable for replace function */
+    $squidconfig = "/usr/local/etc/squid/squid.conf";
+            
+    /* squid_ng.xml values */
+    $active_interface = $config['installedpackages']['squidng']['config'][0]['active_interface'];
+    $transparent_proxy = $config['installedpackages']['squidng']['config'][0]['transparent_proxy'];
+    $log_enabled = $config['installedpackages']['squidng']['config'][0]['log_enabled'];
+    $urlfilter_enable = $config['installedpackages']['squidng']['config'][0]['urlfilter_enable'];
+    $log_query_terms = $config['installedpackages']['squidng']['config'][0]['log_query_terms'];
+    $log_user_agents = $config['installedpackages']['squidng']['config'][0]['log_user_agents'];
+    $proxy_port = $config['installedpackages']['squidng']['config'][0]['proxy_port'];
+    $visible_hostname = $config['installedpackages']['squidng']['config'][0]['visible_hostname'];
+    $cache_admin_email = $config['installedpackages']['squidng']['config'][0]['cache_admin_email'];
+    $error_language = $config['installedpackages']['squidng']['config'][0]['error_language'];
+            
+    /* squid_upstream.xml values */
+    $proxy_forwarding = $config['installedpackages']['squidupstream']['config'][0]['proxy_forwarding'];
+    $client_ip_forwarding = $config['installedpackages']['squidupstream']['config'][0]['client_ip_forwarding'];
+    $user_forwarding = $config['installedpackages']['squidupstream']['config'][0]['user_forwarding'];
+    $upstream_proxy = $config['installedpackages']['squidupstream']['config'][0]['upstream_proxy'];
+    $upstream_proxy_port = $config['installedpackages']['squidupstream']['config'][0]['upstream_proxy_port'];
+    $upstream_username = $config['installedpackages']['squidupstream']['config'][0]['upstream_username'];
+    $upstream_password = $config['installedpackages']['squidupstream']['config'][0]['upstream_psasword'];
+            
+    /* squidcache.xml values */
+    $memory_cache_size = $config['installedpackages']['squidcache']['config'][0]['memory_cache_size'];
+    $harddisk_cache_size = $config['installedpackages']['squidcache']['config'][0]['harddisk_cache_size'];
+    $minimum_object_size = $config['installedpackages']['squidcache']['config'][0]['minimum_object_size'];
+    $maximum_object_size = $config['installedpackages']['squidcache']['config'][0]['maximum_object_size'];
+    $level_subdirs = $config['installedpackages']['squidcache']['config'][0]['level_subdirs'];
+    $memory_replacement = $config['installedpackages']['squidcache']['config'][0]['memory_replacement'];
+    $cache_replacement = $config['installedpackages']['squidcache']['config'][0]['cache_replacement'];
+    $domain = $config['installedpackages']['squidcache']['config'][0]['domain'];
+    $enable_offline = $config['installedpackages']['squidcache']['config'][0]['enable_offline'];
+            
+    /* squidnac.xml values */
+    $allowed_subnets = $config['installedpackages']['squidnac']['config'][0]['allowed_subnets'];
+    $unrestricted_ip_address = $config['installedpackages']['squidnac']['config'][0]['unrestricted_ip_address'];
+    $unrestricted_mac_addresses = $config['installedpackages']['squidnac']['config'][0]['unrestricted_mac_addresses'];
+    $banned_ip_addresses = $config['installedpackages']['squidnac']['config'][0]['banned_ip_addresses'];
+    $banned_mac_addresses = $config['installedpackages']['squidnac']['config'][0]['banned_mac_addresses'];
+           
+    /* squidtraffic.xml values */
+    $max_download_size = $config['installedpackages']['squidtraffic']['config'][0]['max_download_size'];
+    $max_upload_size = $config['installedpackages']['squidtraffic']['config'][0]['max_upload_size'];
+    $dl_overall = $config['installedpackages']['squidtraffic']['config'][0]['dl_overall'];
+    $dl_per_host = $config['installedpackages']['squidtraffic']['config'][0]['dl_per_host'];
+    $throttle_binary_files = $config['installedpackages']['squidtraffic']['config'][0]['throttle_binary_files'];
+    $throttle_cd_images = $config['installedpackages']['squidtraffic']['config'][0]['throttle_cd_images'];
+    $throttle_multimedia = $config['installedpackages']['squidtraffic']['config'][0]['throttle_multimedia'];
+                             
+    /* squidauth.xml values (placeholder for now) */
+	$no_auth = $config['installedpackages']['squidtraffic']['config'][0]['no_auth'];
+	$local_auth = $config['installedpackages']['squidtraffic']['config'][0]['local_auth'];
+	$ldap_auth = $config['installedpackages']['squidtraffic']['config'][0]['ldap_auth'];
+	$windows_auth = $config['installedpackages']['squidtraffic']['config'][0]['windows_auth'];
+	$radius_auth = $config['installedpackages']['squidtraffic']['config'][0]['radius_auth'];
+	$auth_processes = $config['installedpackages']['squidtraffic']['config'][0]['auth_processes'];
+	$auth_cache_ttl = $config['installedpackages']['squidtraffic']['config'][0]['auth_cache_ttl'];
+	$limit_ip_addr = $config['installedpackages']['squidtraffic']['config'][0]['limit_ip_addr'];
+	$user_ip_cache_ttl = $config['installedpackages']['squidtraffic']['config'][0]['user_ip_cache_ttl'];
+	$req_unrestricted_auth = $config['installedpackages']['squidtraffic']['config'][0]['req_unrestricted_auth'];
+	$auth_realm_prompt = $config['installedpackages']['squidtraffic']['config'][0]['auth_realm_prompt'];
+	$no_domain_auth = $config['installedpackages']['squidtraffic']['config'][0]['no_domain_auth'];
+	$min_pass_length = $config['installedpackages']['squidtraffic']['config'][0]['min_pass_length'];
+	$bypass_extended = $config['installedpackages']['squidtraffic']['config'][0]['bypass_extended'];
+			
+    $fout = fopen($squidconfig,"w");
+            
+    /* option: shutdown_lifetime */
+    fwrite($fout, "shutdown_lifetime 5 seconds\n");
+    fwrite($fout, "\n");
+
+	/* option: icp_port */	
+	if($icp_port == "") $icp_port="3130"; 
+	fwrite($fout, "icp_port " . $icp_port . "\n");
+		
+	/* option: http_port */
+	if($http_port == "") $http_port="3128";
+	$int = convert_friendly_interface_to_real_interface_name($config['installedpackages']['squidng']['config'][0]['active_interface']);
+	$listen_ip = find_interface_ip($int);
+	fwrite($fout, "http_port " . $listen_ip . ":" . $http_port . "\n");
+	fwrite($fout, "\n");
+			
+	fwrite($fout, "acl QUERY urlpath_regex cgi-bin \?\n");
+	fwrite($fout, "no_cache deny QUERY\n");		
+			
+	if ($domain !== "") {
+		if (!file_exists("/usr/local/etc/squid/acls")) mwexec("/bin/mkdir -p /usr/local/etc/squid/acls");
+			$aclout = fopen("/usr/local/etc/squid/acls/dst_nocache.acl","w");
+			
+			$domain_array = split(";",$domain);
+			foreach ($domain_array as $no_cache_domain) {
+			fwrite($aclout, $no_cache_domain . "\n");
+		}
+				
+		fclose($aclout);
+		
+		fwrite($fout, 'acl no_cache_domains dstdomain "/usr/local/etc/squid/acls/dst_nocache.acl"' . "\n");
+		fwrite($fout, "no_cache deny no_cache_domains\n");
+	}
+			
+	fwrite($fout, "\n");
+					
+	fwrite($fout, "cache_effective_user squid\n");
+	fwrite($fout, "cache_effective_group squid\n");
+	fwrite($fout, "\n");
+			
+	fwrite($fout, "pid_filename /var/run/squid.pid\n");
+	fwrite($fout, "\n");
+			
+	if ($memory_cache_size == "") $memory_cache_size="8";
+	fwrite($fout, "cache_mem " . $memory_cache_size . " MB\n");
+	if ($harddisk_cache_size == "") $harddisk_cache_size="500";
+	if ($level_subdirs == "") $level_subdirs="16";
+	fwrite($fout, "cache_dir aufs /var/squid/cache " . $harddisk_cache_size . " " . $level_subdirs . " 256\n");
+	fwrite($fout, "\n");
+			
+	if ($error_language == "") $error_language="English";
+	fwrite($fout, "error_directory /usr/local/etc/squid/errors/" . $error_language . "\n");
+	fwrite($fout, "\n");
+			
+	if ($offline_mode == "on") {
+		fwrite($fout, "offline_mode on\n");
+		fwrite($fout, "\n");
+	}
+			
+	if ($memory_replacement == "") $memory_replacement="heap GDSF";
+	fwrite($fout, "memory_replacement_policy " . $memory_replacement . "\n");
+	if ($cache_replacement == "") $cache_replacement="heap GDSF";
+	fwrite($fout, "cache_replacement_policy " . $cache_replacement . "\n");
+	fwrite($fout, "\n");
+			
+	if ($log_enabled == "on" ) {
+		fwrite($fout, "cache_access_log /var/squid/logs/access.log\n");
+		fwrite($fout, "cache_log /var/squid/logs/cache.log\n");
+		fwrite($fout, "cache_store_log none\n");
+	} else {
+		fwrite($fout, "cache_access_log /dev/null\n");
+		fwrite($fout, "cache_log /dev/null\n");
+		fwrite($fout, "cache_store_log none\n");
+	}
+
+	if ($log_query_terms == "on") {
+		fwrite($fout, "strip_query_terms off\n");
+	} else {
+		fwrite($fout, "strip_query_terms on\n");
+	}
+				
+	if ($log_user_agents == "on") {
+		fwrite($fout, "useragent_log /var/squid/logs/useragent.log\n");
+	} 
+	fwrite($fout, "\n");
+			
+	fwrite($fout, "log_mime_hdrs off\n");
+	fwrite($fout, "emulate_httpd_log on\n");
+	if ($client_ip_forwarding !== "on") { 
+		fwrite($fout, "forwarded_for off\n");
+	} elseif ($user_forwarding !== "on") {
+		fwrite($fout, "forwarded_for off\n");
+	} else {
+		fwrite($fout, "forwarded_for on\n");
+	} 
+	fwrite($fout, "\n");
+	
+	if ($no_auth == "on") {
+		fwrite($fout, "\n");
+	}
+			
+	if ($local_auth == "on") {
+		fwrite($fout, "auth_param basic program /usr/local/libexec/squid/ncsa_auth /usr/local/etc/squid/advanced/ncsa/passwd\n");
+		fwrite($fout, "auth_param basic children 5\n");
+		fwrite($fout, "auth_param basic realm pfSense Advanced Proxy Service\n");
+		fwrite($fout, "auth_param basic credentialsttl 60 minutes\n");
+		fwrite($fout, "\n");
+	}
+		
+	/* TODO: placeholder for local user management */
+		
+	if ($throttle_binary_files == "on") {
+		if (!file_exists("/usr/local/etc/squid/acls")) mwexec("/bin/mkdir -p /usr/local/etc/squid/acls");
+			$binary_out = "\.bin$\n\.cab$\n\.gz$\n\.rar$\n\.sea$\n\.tar$\n\.tgz$\n\.zip$\n";	
+
+			$throttle_out = fopen("/usr/local/etc/squid/acls/dst_throttle_binary.acl","w");
+			fwrite($throttle_out, $binary_out);
+			fwrite($fout, 'acl for_throttled_binary url_regex -i "/usr/local/etc/squid/acls/dst_throttle_binary.acl"' . "\n");
+			fclose($throttle_out);
+		} else {
+			if (file_exists("/usr/local/etc/squid/acls/dst_throttle_binary.acl")) unlink("/usr/local/etc/squid/acls/dst_throttle_binary.acl");
+	}
+			
+	if ($throttle_cd_images == "on") {
+		if (!file_exists("/usr/local/etc/squid/acls")) mwexec("/bin/mkdir -p /usr/local/etc/squid/acls");
+				
+		$cd_out = "\.b5t$\n\.bin$\n\.bwt$\n\.cdi$\n\.cue$\n\.gho$\n\.img$\n\.iso$\n\.mds$\n\.nrg$\n\.pqi$\n";
+				
+		$throttle_out = fopen("/usr/local/etc/squid/acls/dst_throttle_cd.acl","w");
+		fwrite($throttle_out, $cd_out);
+		fwrite($fout, 'acl for_throttled_cd url_regex -i "/usr/local/etc/squid/acls/dst_throttle_cd.acl"' . "\n");
+		fclose($throttle_out);
+	} else {
+		if (file_exists("/usr/local/etc/squid/acls/dst_throttle_cd.acl")) unlink("/usr/local/etc/squid/acls/dst_throttle_cd.acl");
+	}
+			
+	if ($throttle_multimedia == "on") {
+		if (!file_exists("/usr/local/etc/squid/acls")) mwexec("/bin/mkdir -p /usr/local/etc/squid/acls");
+			
+		$multimedia_out = "\.aiff?$\n\.asf$\n\.avi$\n\.divx$\n\.mov$\n\.mp3$\n\.mpe?g$\n\.qt$\n\.ra?m$\n";			
+			
+		$throttle_out = fopen("/usr/local/etc/squid/acls/dst_throttle_multimedia.acl","w");
+		fwrite($throttle_out, $multimedia_out);
+		fwrite($fout, 'acl for_throttled_multimedia url_regex -i "/usr/local/etc/squid/acls/dst_throttle_multimedia.acl"' . "\n");
+		fclose($throttle_out);
+	} else {
+		if (file_exists("/usr/local/etc/squid/acls/dst_throttle_multimedia.acl")) unlink("/usr/local/etc/squid/acls/dst_throttle_multimedia.acl");			
+	}	
+			
+	fwrite($fout, "acl within_timeframe time MTWHFAS 00:00-24:00\n");
+	fwrite($fout, "\n");
+			
+    /* obtain interface subnet and address for Squid rules */
+    $lactive_interface = strtolower($active_interface);
+            
+    $lancfg = $config['interfaces'][$lactive_interface];
+    $lanif = $lancfg['if'];
+    $lanip = $lancfg['ipaddr'];
+    $lansa = gen_subnet($lancfg['ipaddr'], $lancfg['subnet']);
+    $lansn = $lancfg['subnet'];			
+
+	fwrite($fout, "acl all src " . $lansa . "/" . $lansn . "\n");
+	fwrite($fout, "acl localnet src " . $lansa . "/" . $lansn . "\n");
+	fwrite($fout, "acl localhost src 127.0.0.1/255.255.255.255\n");
+	fwrite($fout, "acl Safe_ports port 80 # http\n");
+	fwrite($fout, "acl Safe_ports port 21 # ftp\n");
+	fwrite($fout, "acl Safe_ports port 443 563 # https, snews\n");
+	fwrite($fout, "acl Safe_ports port 70 # gopher\n");
+	fwrite($fout, "acl Safe_ports port 210 # wais\n");
+	fwrite($fout, "acl Safe_ports port 1025-65535 # unregistered ports\n");
+	fwrite($fout, "acl Safe_ports port 280 # http-mgmt\n");
+	fwrite($fout, "acl Safe_ports port 488 # gss-http\n");
+	fwrite($fout, "acl Safe_ports port 591 # filemaker\n");
+	fwrite($fout, "acl Safe_ports port 777 # multiling http\n");
+	fwrite($fout, "acl Safe_ports port 800 # Squids port (for icons)\n");
+	fwrite($fout, "\n");
+			
+	/* allow access through proxy for custom admin port */
+          $custom_port = $config['system']['webgui']['port'];
+	if ($custom_port !== "") {
+		fwrite($fout, "acl pf_admin_port port " . $custom_port . "\n");
+	}
+			
+	/* define subnets allowed to utilize proxy service */
+	if ($allowed_subnets !== "") {
+		if (!file_exists("/usr/local/etc/squid/acls")) mwexec("/bin/mkdir -p /usr/local/etc/squid/acls");
+	
+		$aclout = fopen("/usr/local/etc/squid/acls/src_subnets.acl","w");
+				
+		$allowed_subnets_array = split(";",$allowed_subnets);
+		foreach ($allowed_subnets_array as $ind_allowed_subnets) {
+			fwrite($aclout, $ind_allowed_subnets . "\n");
+		}
+				
+		fclose($aclout);
+				
+		fwrite($fout, 'acl pf_networks src "/usr/local/etc/squid/acls/src_subnets.acl"' . "\n");
+	}
+			
+	/* define ip addresses that have 'unrestricted' access */
+	if ($unrestricted_ip_address !== "") {
+		if (!file_exists("/usr/local/etc/squid/acls")) mwexec("/bin/mkdir -p /usr/local/etc/squid/acls");
+			$aclout = fopen("/usr/local/etc/squid/acls/src_unrestricted_ip.acl","w");
+		
+			$unrestricted_ip_array = split(";",$unrestricted_ip_address);
+			foreach ($unrestricted_ip_array as $ind_unrestricted_ip) {
+				fwrite($aclout, $ind_unrestricted_ip . "\n");
+		}
+				
+		fclose($aclout);
+		
+		fwrite($fout, 'acl pf_unrestricted_ip src "/usr/local/etc/squid/acls/src_unrestricted_ip.acl"' . "\n");
+	}
+			
+	/* define mac addresses that have 'unrestricted' access */
+	if ($unrestricted_mac_addresses !== "") {
+		if (!file_exists("/usr/local/etc/squid/acls")) mwexec("/bin/mkdir -p /usr/local/etc/squid/acls");
+
+		$aclout = fopen("/usr/local/etc/squid/acls/src_unrestricted_mac.acl","w");
+			
+		$unrestricted_mac_array = split(";",$unrestricted_mac_addresses);
+		foreach ($unrestricted_mac_array as $ind_unrestricted_mac) {
+			fwrite($aclout, $ind_unrestricted_mac . "\n");
+		}
+			
+		fclose($aclout);
+		
+		fwrite($fout, 'acl pf_unrestricted_mac src "/usr/local/etc/squid/acls/src_unrestricted_mac.acl"' . "\n");
+	}
+			
+	/* define ip addresses that are banned from using the proxy service */
+	if ($banned_ip_addresses !== "") {
+		if (!file_exists("/usr/local/etc/squid/acls")) mwexec("/bin/mkdir -p /usr/local/etc/squid/acls");
+
+			$aclout = fopen("/usr/local/etc/squid/acls/src_banned_ip.acl","w");
+			
+			$banned_ip_array = split(";",$banned_ip_addresses);
+			foreach ($banned_ip_array as $ind_banned_ip) {
+				fwrite($aclout, $ind_banned_ip . "\n");
+		}
+				
+			fclose($aclout);
+		
+		fwrite($fout, 'acl pf_banned_ip src "/usr/local/etc/squid/acls/src_banned_ip.acl"' . "\n");
+	}
+			
+	/* define mac addresses that are banned from using the proxy service */
+	if ($banned_mac_addresses !== "") {
+		if (!file_exists("/usr/local/etc/squid/acls")) mwexec("/bin/mkdir -p /usr/local/etc/squid/acls");
+	
+			$aclout = fopen("/usr/local/etc/squid/acls/src_banned_mac.acl","w");
+			
+			$banned_mac_array = split(";",$banned_mac_addresses);
+			foreach ($banned_mac_array as $ind_banned_mac) {
+				fwrite($aclout, $ind_banned_mac . "\n");
+			}
+				
+		fclose($aclout);
+		
+		fwrite($fout, 'acl pf_banned_mac src "/usr/local/etc/squid/acls/src_banned_mac.acl"' . "\n");
+	}
+			
+    fwrite($fout, "acl CONNECT method CONNECT\n");
+    fwrite($fout, "\n");
+            
+    fwrite($fout, "#access to squid; local machine; no restrictions\n");
+    fwrite($fout, "http_access allow localnet\n");
+    fwrite($fout, "http_access allow localhost\n");
+	fwrite($fout, "\n");
+       		
+	fwrite($fout, "#Deny non web services\n");
+    fwrite($fout, "http_access deny !Safe_ports\n");
+    fwrite($fout, "http_access deny CONNECT\n");
+    fwrite($fout, "\n");
+            
+    fwrite($fout, "#Set custom configured ACLs\n");
+    fwrite($fout, "http_access deny all\n");
+    fwrite($fout, "\n");
+            
+	if ($dl_overall !== "" and $dl_per_host == "") {
+		fwrite($fout, "#Set throttle and bandwidth restrictions\n");
+		
+       	fwrite($fout, "delay_pools 1\n");
+       	fwrite($fout, "delay_class 1 3\n");
+       	
+       	if ($dl_overall == "unlimited") {
+       		fwrite($fout, "delay_parameters 1 -1/-1 -1/-1 " . ($dl_overall * 125) . "/" . ($dl_overall * 250) . "\n");
+       	} else {
+       		fwrite($fout, "delay_parameters 1 " . ($dl_overall * 125) . "/" . ($dl_overall * 250) . " -1/-1 -1/-1\n");
+       	}
+       	
+   		/* if no unrestricted ip addresses are defined; this line is ignored */ 	      	
+ 		if ($unrestricted_ip_address == "") fwrite($fout, "delay_access 1 deny pf_unrestricted_ip\n");
+  	
+       	fwrite($fout, "#delay_access 1 deny for_extended_users\n");
+       	
+   		/* this will define bandwidth delay restrictions for specified throttles */
+   		if ($throttle_binary_files == "on") {
+   			fwrite($fout, "delay_access 1 allow all for_throttled_binary\n");
+   		}
+   		if ($throttle_cd_images == "on") {
+   			fwrite($fout, "delay_access 1 allow all for_throttled_cd\n");
+   		}
+   		if ($throttle_multimedia == "on") {
+   			fwrite($fout, "delay_access 1 allow all for_throttled_multimedia\n");
+   		} else {
+   			fwrite($fout, "delay_access 1 allow all\n");
+   		}       	
+   		fwrite($fout, "delay_initial_bucket_level 100%\n\n");
+    }
+            
+    if ($dl_per_host !== "" and $dl_overall == "") {
+		fwrite($fout, "#Set throttle and bandwidth restrictions\n");   
+		
+       	fwrite($fout, "delay_pools 1\n");
+      	fwrite($fout, "delay_class 1 3\n");
+      	
+      	if ($dl_per_host == "unlimited") {
+      		fwrite($fout, "delay_parameters 1 " . ($dl_per_host * 125) . "/" . ($dl_per_host * 250) . "-1/-1 -1/-1\n");
+      	} else {
+       		fwrite($fout, "delay_parameters 1 -1/-1 -1/-1 " . ($dl_per_host * 125) . "/" . ($dl_per_host * 250) . "\n");
+       	}
+
+   		/* if no unrestricted ip addresses are defined; this line is ignored */ 	
+ 		if ($unrestricted_ip_address !== "") fwrite($fout, "delay_access 1 deny pf_unrestricted_ip\n");
+  		
+       	fwrite($fout, "#delay_access 1 deny for_extended_users\n");
+       	
+   		/* this will define bandwidth delay restrictions for specified throttles */     	
+   		if ($throttle_binary_files == "on") {
+   			fwrite($fout, "delay_access 1 allow all for_throttled_binary\n");
+   		}
+   		if ($throttle_cd_images == "on") {
+   			fwrite($fout, "delay_access 1 allow all for_throttled_cd\n");
+   		}
+   		if ($throttle_multimedia == "on") {
+   			fwrite($fout, "delay_access 1 allow all for_throttled_multimedia\n");
+   		} else {
+   			fwrite($fout, "delay_access 1 allow all\n");
+   		}
+       	fwrite($fout, "delay_initial_bucket_level 100%\n\n");
+		fwrite($fout, "\n");  	
+    }
+	        
+    if ($dl_overall !== "" and $dl_per_host !== "") {    
+    	/* if no bandwidth restrictions are specified, then these parameters are not necessary */
+    	if ($dl_overall !== "unlimited" and $dl_per_host !== "unlimited") { 	
+			fwrite($fout, "#Set throttle and bandwidth restrictions\n");
+
+   			if ($dl_overall == "unlimited" and $dl_per_host !== "") { 
+   				fwrite($fout, "delay_pools 1\n");
+   				fwrite($fout, "delay_class 1 3\n");
+   				fwrite($fout, "delay_parameters 1 -1/-1 -1/-1 " . ($dl_per_host * 125) . "/" . ($dl_overall * 250) . "\n");
+   			} elseif ($dl_overall !== "" and $dl_per_host == "unlimited") {
+   				fwrite($fout, "delay_pools 1\n");
+   				fwrite($fout, "delay_class 1 3\n");
+   				fwrite($fout, "delay_parameters 1 " . ($dl_overall * 125) . "/" . ($dl_overall * 250) . " -1/-1 -1/-1\n");
+   			}
+   		}
+   		
+   		if ($dl_overall !== "unlimited" and $dl_per_host !== "unlimited") {
+   		
+   			/* if no unrestricted ip addresses are defined; this line is ignored */
+   			if ($unrestricted_ip_address !== "") fwrite($fout, "delay_access 1 deny pf_unrestricted_ip\n");
+ 
+   			fwrite($fout, "#delay_access 1 deny for_extended_users\n");
+   		
+   			/* this will define bandwidth delay restrictions for specified throttles */
+   			if ($throttle_binary_files == "on") {
+   				fwrite($fout, "delay_access 1 allow all for_throttled_binary\n");
+   			}
+   			if ($throttle_cd_images == "on") {
+   				fwrite($fout, "delay_access 1 allow all for_throttled_cd\n");
+   			}
+   			if ($throttle_multimedia == "on") {
+   				fwrite($fout, "delay_access 1 allow all for_throttled_multimedia\n");
+   			} else {
+   				fwrite($fout, "delay_access 1 allow all\n");
+   			}
+   			fwrite($fout, "delay_initial_bucket_level 100%\n\n");
+   		}
+    }
+
+    fwrite($fout, "#Strip HTTP Header\n");
+    fwrite($fout, "header_access X-Forwarded-For deny all\n");
+    fwrite($fout, "header_access Via deny all\n");
+    fwrite($fout, "\n");
+            
+	/* TODO: acl customization for snmp support */
+	fwrite($fout, "snmp_access deny all\n");
+	fwrite($fout, "\n");           
+
+	if ($urlfilter_enable == "on") {
+		fwrite($fout, "redirect_program /usr/sbin/squidGuard");
+		fwrite($fout, "redirect_children 5");
+		fwrite($fout, "\n");
+	}	
+						
+	if ($max_upload_size != "") {
+		fwrite($fout, "request_body_max_size " . $max_download_size . "KB\n");
+	}
+			
+	if ($max_download_size != "") {
+		if ($unrestricted_ip_addresses !== "") fwrite($fout, "reply_body_max_size 0 allow pf_unrestricted_ip\n");
+		fwrite($fout, "#reply_body_max_size 0 allow for_extended_users\n");
+		fwrite($fout, "reply_body_max_size " . $max_download_size * 1024 . " allow all\n");
+		fwrite($fout, "\n");
+	}
+			
+	if ($visible_hostname !== "") {
+		fwrite($fout, "visible_hostname " . $visible_hostname . "\n");
+	} 
+			
+	if ($cache_admin_email !== "") {
+		fwrite($fout, "cache_mgr " . $cache_admin_email . "\n");
+		fwrite($fout, "\n");
+	}
+			
+	if ($maximum_object_size == "") $maximum_object_size="4096";
+	if ($minimum_object_size == "") $minimum_object_size="0";
+	fwrite($fout, "maximum_object_size " . $maximum_object_size . " KB\n");
+	fwrite($fout, "minimum_object_size " . $minimum_object_size . " KB\n");
+	fwrite($fout, "\n");
+			
+	if ($proxy_forwarding == "on") {
+		fwrite($fout, "cache_peer " . $upstream_proxy . "parent " . $upstream_proxy_port . "3130 login=" . upstream_username . ":" . upstream_password . " default no-query\n");
+		fwrite($fout, "never_direct allow all\n");
+	}	
+			
+	if ($transparent_proxy == "on") {
+       	fwrite($fout, "httpd_accel_host virtual\n");
+      	fwrite($fout, "httpd_accel_port 80\n");
+       	fwrite($fout, "httpd_accel_with_proxy on\n");
+       	fwrite($fout, "httpd_accel_uses_host_header on\n");	
+       	fwrite($fout, "\n");			
+    }
+			
+	fclose($fout);
+			
+	conf_mount_ro();
+	config_unlock();
+			
+	touch($squidconfig);
+} /* end function write_squid_config */
+