<?php
/*
	havp.inc
	part of pfSense (https://www.pfSense.org/)
	Copyright (C) 2009-2010 Sergey Dvoriancev <dv_serg@mail.ru>
	Copyright (C) 2014 Andrew Nikitin <andrey.b.nikitin@gmail.com>.
	Copyright (C) 2015 ESF, LLC
	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.
*/
require_once('globals.inc');
require_once('config.inc');
require_once('util.inc');
require_once('system.inc');
require_once('pfsense-utils.inc');
require_once('pkg-utils.inc');
require_once('service-utils.inc');

/*
* ------------------------------------------------------------------------------
* Globals
* ------------------------------------------------------------------------------
* Set to true to enable debug
*/
define('HV_DEBUG',		'false');

/* Use clamd daemon or libclam */
//define('HV_USE_CLAMD',	'true');
define('HV_CLAMD_TCPSOCKET',	'true');

/*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* RAM Disk - use as 'tmp' dir for faster scanning
* Note: these options allow RAM Disk allocation
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* Set 'true' to enable RAM Disk
*/
define('HV_USE_TMPRAMDISK',	'true');
/* Set 'false' to disable RAM Disk on VM in case you have troubles */
define('HV_VM_TMPRAMDISK',	'true');

/*
* ------------------------------------------------------------------------------
* Forms
* ------------------------------------------------------------------------------
*/
define('HVFORM_HAVP',		'havp');
define('HVFORM_FSCAN',		'havpfscan');
define('HVFORM_AVSET',		'havpavset');

/*
* ------------------------------------------------------------------------------
* Defines
* ------------------------------------------------------------------------------
*/
/* HAVP */
define('HVDEF_ADDR',		'127.0.0.1');
define('HVDEF_PROXYPORT',	'8080');
define('HVDEF_MAXSCANSIZE',	'5000000'); // [bytes] ! do not enter 0 or big size !
define('HVDEF_MAXARCSCANSIZE',	'5000000'); // [bytes] ! do not enter 0 or big size !
define('HVDEF_PID_FILE',	'/var/run/havp.pid');

$pf_version=substr(trim(file_get_contents("/etc/version")), 0, 3);
if ($pf_version == "2.1" || $pf_version == "2.2") {
	define("HVDEF_WORK_DIR", 	"/usr/pbi/havp-" . php_uname("m") . "/local/etc");
	define('HVDEF_TEMPLATES',	"/usr/pbi/havp-" . php_uname("m") . "/local/share/examples/havp/templates");
	define('HVDEF_TEMPLATES_EX',	HVDEF_TEMPLATES . '_ex');
} else {
	define("HVDEF_WORK_DIR", 	"/usr/local/etc/havp");
	define('HVDEF_TEMPLATES',	'/usr/local/share/examples/havp/templates');
	define('HVDEF_TEMPLATES_EX',	HVDEF_TEMPLATES . '_ex');
}

define('HVDEF_LOG_DIR',		'/var/log/havp');
define('HVDEF_TEMP_DIR',	'/var/tmp');
define('HVDEF_HAVPTEMP_DIR',	HVDEF_TEMP_DIR . '/havp');
define('HVDEF_RAMTEMP_DIR',	HVDEF_TEMP_DIR . '/havpRAM');
define('HVDEF_SCANTEMPFILE',	'/havp-XXXXXX');
define('HVDEF_HAVP_CONFIG',	HVDEF_WORK_DIR . '/havp.config');
define('HVDEF_HAVP_XMLCONF',	HVDEF_WORK_DIR . '/havp_conf.xml');
define('HVDEF_HAVP_WHITELIST',	HVDEF_WORK_DIR . '/whitelist');
define('HVDEF_HAVP_BLACKLIST',	HVDEF_WORK_DIR . '/blacklist');
define('HVDEF_HAVP_ACCESSLOG',	HVDEF_LOG_DIR . '/access.log');
define('HVDEF_HAVP_ERRORLOG',	HVDEF_LOG_DIR . '/havp.log');
define('HVDEF_HAVP_MINSRV',	'3');
define('HVDEF_HAVP_MAXSRV',	'100');

/* ClamAV */
define('HVDEF_CLAM_RUNDIR',	'/var/run/clamav');
define('HVDEF_CLAM_DBDIR',	'/var/db/clamav');
define('HVDEF_AVLOG_DIR',	'/var/log/clamav');
define('HVDEF_CLAM_SOCKET',	HVDEF_CLAM_RUNDIR . '/clamd.sock');
define('HVDEF_CLAM_PID',	HVDEF_CLAM_RUNDIR . '/clamd.pid');
define('HVDEF_CLAM_LOG',	HVDEF_AVLOG_DIR . '/clamd.log');
define('HVDEF_CLAM_WORKDIR',	'/usr/local/etc');
define('HVDEF_CLAM_CONFIG',	'/usr/local/etc/clamd.conf');
define('HVDEF_CLAM_TCPSOCKET',	'3310');
define('HVDEF_FRESHCLAM_CONF',	'/usr/local/etc/freshclam.conf');
define('HVDEF_FRESHCLAM_LOG',	HVDEF_AVLOG_DIR . '/freshclam.log');
define('HVDEF_CLAMSCAN_LOG',	'/var/log/clamscan.log');
define('HVDEF_STATUS_FILE',	'/var/tmp/havp.status');

/* Scripts */
define('HVDEF_SCRIPT_DIR',		'/usr/local/etc/rc.d');
define('HVDEF_AVCRON_SCRIPT',		'/clamav-freshclam');
define('HVDEF_HAVP_STARTUP_SCRIPT',	HVDEF_SCRIPT_DIR . '/havp.sh');
define('HVDEF_CLAM_STARTUP_SCRIPT',	HVDEF_SCRIPT_DIR . '/clamd');
define('HVDEF_AVUPD_SCRIPT',		HVDEF_SCRIPT_DIR . '/havp_avupdate');

/* Status */
define('HVDEF_HAVP_STATUS_FILE',	'/tmp/havp.status');
define('HVDEF_CLAM_STATUS_FILE',	'/tmp/clam.status');
define('HVDEF_UPD_STATUS_FILE',		'/tmp/havp.update.status');
define('HVDEF_FRESHCLAM_STATUS_FILE',	'/tmp/havp.freshclam.status');

/* Cron */
define('HVDEF_CLAM_UPD_CRONNAME',	'havp_clam_update');
define('HVDEF_CLAM_UPD_CRONCMD',	HVDEF_SCRIPT_DIR . HVDEF_AVCRON_SCRIPT . " start");
define('HVDEF_CLAM_UPD_CRONKEY',	HVDEF_AVCRON_SCRIPT);

/* User */
define('HVDEF_USER',		'havp');
define('HVDEF_GROUP',		'havp');
define('HVDEF_AVUSER',		HVDEF_USER);

define('HV_SCANTEMPFILE',	'hv_scan_tempfile');

/*
* ------------------------------------------------------------------------------
* XML fields
* ------------------------------------------------------------------------------
*/
define('F_ENABLE',		'enable');
define('F_USECLAMD',		'useclamd');
define('F_PROXYMODE',		'proxymode');
define('F_PROXYINTERFACE',	'proxyinterface');
define('F_PROXYBINDIFACE',	'proxybindiface'); // internal var
define('F_PROXYPORT',		'proxyport');
define('F_PARENTPROXY',		'parentproxy');
define('F_LANGUAGE',		'lang');
define('F_MAXDOWNLOADSIZE',	'maxdownloadsize');
define('F_RANGE',		'range');
define('F_WHITELIST',		'whitelist');
define('F_BLACKLIST',		'blacklist');
define('F_ENABLEFORWARDEDIP',	'enableforwardedip');
define('F_ENABLEXFORWARDEDFOR',	'enablexforwardedfor');
define('F_ENABLERAMDISK',	'enableramdisk');
/* Scanner */
define('F_FAILSCANERROR',	'failscanerror');
define('F_SCANMAXSIZE',		'scanmaxsize');
define('F_SCANIMG',		'scanimg');
define('F_SCANARC',		'scanarc');
define('F_SCANSTREAM',		'scanstream');
define('F_SCANARCMAXSIZE',	'scanarcmaxsize');
define('F_SCANBROKENEXE',	'scanbrokenexe');
/* Antivirus Options */
define('F_HAVPUPDATE',		'havpavupdate');
define('F_DBREGION',		'dbregion');
define('F_AVUPDATESERVER',	'avupdateserver');
/* Logging */
define('F_SYSLOG',		'syslog');
define('F_LOG',			'log');
define('F_AVSETSYSLOG',		'avsetsyslog');
define('F_AVSETLOG',		'avsetlog');

define('F_TEMPLATEPATH',	'templatepath'); // internal var
/* File Scanner [HVFORM_FSCAN] */
define('F_SCANFILEPATH',	'scanfilepath');
define('F_DISABLEXFORWARD',	'disablexforward');
define('F_FORWARDEDIP',		'forwardedip');

/*
* ------------------------------------------------------------------------------
* Global Config
* ------------------------------------------------------------------------------
*/
$havp_config = array();
$havp_config[HV_SCANTEMPFILE] = HVDEF_HAVPTEMP_DIR . HVDEF_SCANTEMPFILE;

/*
* ------------------------------------------------------------------------------
* Initialization
* ------------------------------------------------------------------------------
*/
havp_convert_pfxml_xml();

/*
* ==============================================================================
* Installation and config
* ==============================================================================
*/
function havp_install() {
	update_status("HAVP check system ...\n");
	havp_check_system();
	// Remove stale scripts
	unlink_if_exists(HVDEF_SCRIPT_DIR . "/havp");
	unlink_if_exists(HVDEF_SCRIPT_DIR . "/clamd.sh");

	havp_avset_resync();
	havp_update_AV();

	update_status("Starting update of AV databases. Wait 5-20 min before use ...");
}

function havp_deinstall() {
	$crontask = "/usr/bin/nice -n20 " . HVDEF_AVUPD_SCRIPT;
	install_cron_job($crontask, false);
	mwexec("/usr/bin/killall -9 havp");
	unlink_if_exists(HVDEF_HAVP_STARTUP_SCRIPT);
	unlink_if_exists(HVDEF_PID_FILE);
	// unlink_if_exists(HVDEF_CLAM_STARTUP_SCRIPT);
	// unlink_if_exists(HVDEF_AVUPD_SCRIPT);
	// unlink_if_exists(HVDEF_CLAM_PID);
	// unlink_if_exists(HVDEF_CLAM_SOCKET);
	if (is_dir("/usr/local/share/examples/havp/")) {
		mwexec("/bin/rm -rf /usr/local/share/examples/havp/");
	}
	umountRAMDisk();
}
/*
* ==============================================================================
* Events
* ==============================================================================
* Before form
* ------------------------------------------------------------------------------
*/
function havp_fscan_before_form(&$pkg) {
	if (is_array($pkg['fields']['field'])) {
		foreach ($pkg['fields']['field'] as $key => $field) {
			if ($field['fieldname'] === F_SCANFILEPATH) {
				$pkg['fields']['field'][$key]['description'] .= havp_fscan_html();
				break;
			}
		}
	}
}
/*
* ------------------------------------------------------------------------------
* Validation
* ------------------------------------------------------------------------------
*/
function havp_validate_settings($post, &$input_errors) {
	$submit = isset($_GET['submit']) ? $_GET['submit'] : $_POST['submit'];

	/* Manual AV database update */
	if ($submit === 'Update_AV') {
		havp_update_AV();
	} elseif ($submit === 'Start_scan') {
	/* Scan file or directory */
		if (file_exists($post[F_SCANFILEPATH])) {
			start_antivirus_scanner($post[F_SCANFILEPATH]);
		} else {
			$input_errors[] = "File or path does not exist: '{$post[F_SCANFILEPATH]}'.";
		}
	} else {
		/* Interfaces */
		if (!isset($post[F_PROXYINTERFACE]) || empty($post[F_PROXYINTERFACE])) {
			$post[F_PROXYINTERFACE] = "lan";
		}

		/* Port validation */
		$prxport = trim($post[F_PROXYPORT]);
		if (!empty($prxport) && !is_port($prxport)) {
			$input_errors[] = 'You must enter a valid port number in the \'Proxy Port\' field';
		}

		/* Parent proxy validation */
		$parent = trim($post[F_PARENT]);

		/* Max Download Size validation */
		$maxval = trim($post[F_MAXDOWNLOADSIZE]);
		if (!empty($maxval) && !is_numericint($maxval)) {
			$input_errors[] = 'You must enter a valid numeric value in \'Max download size\' field.';
		}

		/* Scan Max File Size validation */
		$maxval = trim($post[F_SCANMAXSIZE]);
		if (!empty($maxval) && !is_numericint($maxval)) {
			$input_errors[] = 'You must enter a valid numeric value in \'Scan Max File Size\' field.';
		}

		/* Whitelist validation */
		$lst = str_replace(array(" ", ";"), "\n", $post[F_WHITELIST]);
		$lst = explode("\n", $lst);
		foreach ($lst as $dm) {
			$dm = trim($dm);
			if ($dm && check_bw_domain($dm) === false) {
				$input_errors[] = "Invalid whitelist element: {$dm}. Valid examples: '*domain.com, domain.com/*path*'.";
			}
		}

		/* Blacklist validation */
		$lst = str_replace(array(" ", ";"), "\n", $post[F_BLACKLIST]);
		$lst = explode("\n", $lst);
		foreach ($lst as $dm) {
			$dm = trim($dm);
			if ($dm && check_bw_domain($dm) === false) {
				$input_errors[] = "Invalid blacklist element: {$dm}. Valid examples: '*domain.com, domain.com/*path*'.";
			}
		}
	}
}
/*
* ------------------------------------------------------------------------------
* Resync
* ------------------------------------------------------------------------------
*/
function havp_resync() {
	global $havp_config;

	havp_convert_pfxml_xml();
	havp_check_system();

	/*
	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	* Whitelist and Blacklist
	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	*/
	// Also white-listed by default:
	$whitelist = havp_whitelist_def() . "\n" . str_replace(";", "\n", $havp_config[F_WHITELIST]);
	$blacklist = str_replace(";", "\n", $havp_config[F_BLACKLIST]);
	// Fix: stupid HAVP parser - error on 0x0D:
	$whitelist = str_replace("\r", "", $whitelist);
	$blacklist = str_replace("\r", "", $blacklist);
	file_put_contents(HVDEF_HAVP_WHITELIST, $whitelist);
	file_put_contents(HVDEF_HAVP_BLACKLIST, $blacklist);

	/* Reconfigure clamd */
	havp_reconfigure_clamd();

	/* Configure HAVP */
	file_put_contents (HVDEF_HAVP_CONFIG, havp_config_havp());
	havp_set_file_access(HVDEF_WORK_DIR, HVDEF_USER, '0755');

	if ($havp_config[F_ENABLE] === 'true') {
		mwexec_bg(HVDEF_HAVP_STARTUP_SCRIPT . " restart");
		log_error("Starting HAVP");
	} else {
		mwexec_bg(HVDEF_HAVP_STARTUP_SCRIPT . " stop");
		log_error("Stopping HAVP");
	}

	/* Reconfigure Squid */
	havp_configure_squid();

	/* Reconfigure AV parts */
	havp_reconfigure_freshclam();
	havp_reconfigure_cron();

}

function havp_avset_resync() {
	havp_convert_pfxml_xml();
	havp_check_system();
	/* Reconfigure */
	havp_reconfigure_clamd();
	havp_reconfigure_freshclam();
	havp_reconfigure_cron();
}
/*
* ==============================================================================
* Check system
* ==============================================================================
*/
function havp_check_system() {
	global $havp_config;

	/* Check/create user/group accounts */
	$grp = exec('/usr/sbin/pw group show ' . HVDEF_GROUP);
	if (strpos($grp, HVDEF_GROUP) !== 0) {
		exec('/usr/sbin/pw group add ' . HVDEF_GROUP);
		log_error("Antivirus: Group '" . HVDEF_GROUP . "' was added.");
	}
	$usr = exec('/usr/sbin/pw usershow -n ' . HVDEF_USER);
	if (strpos($usr, HVDEF_USER) !== 0) {
		exec('/usr/sbin/pw useradd ' . HVDEF_USER . ' -g ' . HVDEF_GROUP . ' -h - -s "/sbin/nologin" -d "/nonexistent" -c "havp daemon"');
		log_error("Antivirus: User '" . HVDEF_USER . "' was added.");
	}

	/* Workdir permissions */
	havp_set_file_access(HVDEF_WORK_DIR, HVDEF_USER, '');

	/* HAVP tempdir */
	if (!file_exists(HVDEF_HAVPTEMP_DIR)) {
		mwexec("/bin/mkdir -p " . HVDEF_HAVPTEMP_DIR);
	}
	havp_set_file_access(HVDEF_HAVPTEMP_DIR, HVDEF_USER, '');

	/* ClamAV dbdir */
	if (!file_exists(HVDEF_CLAM_DBDIR)) {
		mwexec("/bin/mkdir -p " . HVDEF_CLAM_DBDIR);
	}
	havp_set_file_access(HVDEF_CLAM_DBDIR, HVDEF_AVUSER, '');

	/* RAM tempdir */
	if (!file_exists(HVDEF_RAMTEMP_DIR)) {
		mwexec("/bin/mkdir -p " . HVDEF_RAMTEMP_DIR);
	}
	havp_set_file_access(HVDEF_RAMTEMP_DIR, HVDEF_USER, '');

	/* Template directory and permissions */
	if (!file_exists(HVDEF_TEMPLATES_EX)) {
		mwexec("/bin/mkdir -p " . HVDEF_TEMPLATES_EX);
	}
	havp_set_file_access(HVDEF_TEMPLATES, HVDEF_USER, '');
	havp_set_file_access(HVDEF_TEMPLATES_EX, HVDEF_USER, '');

	/* HAVP log dir */
	if (!file_exists(HVDEF_LOG_DIR)) {
		mwexec("/bin/mkdir -p " . HVDEF_LOG_DIR);
	}
	havp_set_file_access(HVDEF_LOG_DIR, HVDEF_USER, '');
	/* Create log files if needed */
	if (!file_exists(HVDEF_HAVP_ACCESSLOG)) {
		file_put_contents(HVDEF_HAVP_ACCESSLOG, '');
	}
	if (!file_exists(HVDEF_HAVP_ERRORLOG)) {
		file_put_contents(HVDEF_HAVP_ERRORLOG, '');
	}
	/* Log dir permissions */
	havp_set_file_access(HVDEF_LOG_DIR, HVDEF_USER, '0764');

	/* PID file */
	if (!file_exists(HVDEF_PID_FILE)) {
		file_put_contents(HVDEF_PID_FILE, '');
	}
	havp_set_file_access(HVDEF_PID_FILE, HVDEF_USER, '0664');

	/* freshclam config permissions */
	if (!file_exists(HVDEF_FRESHCLAM_CONF)) {
		file_put_contents(HVDEF_FRESHCLAM_CONF, '');
	}
	havp_set_file_access(HVDEF_FRESHCLAM_CONF, HVDEF_AVUSER, '0664');

	/* AV log dir */
	if (!file_exists(HVDEF_AVLOG_DIR)) {
		mwexec("mkdir -p " . HVDEF_AVLOG_DIR);
	}
	havp_set_file_access(HVDEF_AVLOG_DIR, HVDEF_USER, '');

	/* Create AV log files if needed */
	if (!file_exists(HVDEF_CLAM_LOG)) {
		file_put_contents(HVDEF_CLAM_LOG, '');
	}
	if (!file_exists(HVDEF_FRESHCLAM_LOG)) {
		file_put_contents(HVDEF_FRESHCLAM_LOG, '');
	}
	/* Log dir permissions */
	havp_set_file_access(HVDEF_AVLOG_DIR, HVDEF_USER, '0777');

	/* ClamAV */
	/* Directory for pid and socket files */
	if (!file_exists(HVDEF_CLAM_RUNDIR)) {
		mwexec("mkdir -p " . HVDEF_CLAM_RUNDIR);
	}
	havp_set_file_access(HVDEF_CLAM_RUNDIR, HVDEF_USER, '0774');

	/* AV update script */
	file_put_contents(HVDEF_AVUPD_SCRIPT, havp_AVupdate_script());
	havp_set_file_access(HVDEF_AVUPD_SCRIPT, HVDEF_AVUSER, '0755');

	/* AV update notification script */
	// file_put_contents(HVDEF_ON_AVUPD_SCRIPT, havp_on_avupd_script());
	// havp_set_file_access(HVDEF_ON_AVUPD_SCRIPT, HVDEF_AVUSER, '0755');

	/* Startup scripts (HAVP and clamd) */
	havp_startup_script();
	hv_clamd_startup_script();

	/* mount RAMDisk */
	mountRAMdisk(true);
}
/*
* ==============================================================================
* Reconfigure package parts
* ==============================================================================
*/
function havp_reconfigure_clamd() {
	file_put_contents(HVDEF_CLAM_CONFIG, havp_config_clam());
	havp_set_file_access(HVDEF_CLAM_CONFIG, HVDEF_USER, '0664');
}

function havp_reconfigure_freshclam() {
	file_put_contents (HVDEF_FRESHCLAM_CONF, havp_config_freshclam());
	havp_set_file_access(HVDEF_FRESHCLAM_CONF, HVDEF_USER, '0664');
}

function havp_reconfigure_cron() {
	global $config;

	/* Cron task */
	$on = false;
	$optval = array("", "*/1", "*/2", "*/3", "*/4", "*/6", "*/8", "*/12", "0");
	$opt = array("0", "*", "*", "*", "*", "root");
	$opt[1] = $optval[$havp_config[F_HAVPUPDATE]];
	$on = ($opt[1] != "");
	$crontask = "/usr/bin/nice -n20 " . HVDEF_AVUPD_SCRIPT;

	// Set new cron task or remove it if inactive
	if ($on === true) {
		install_cron_job($crontask, true, $opt[0], $opt[1], $opt[2], $opt[3], $opt[4], $opt[5]);
	} else {
		install_cron_job($crontask, false);
	}
}
/*
* ------------------------------------------------------------------------------
* Convert configuration to XML
* ------------------------------------------------------------------------------
*/
function havp_convert_pfxml_xml() {
	global $config, $havp_config;

	$pfconf = $config['installedpackages'][HVFORM_HAVP]['config'][0];

	/* === GUI Fields === */
	$havp_config[F_ENABLE] = ($pfconf[F_ENABLE] === 'on' ? 'true' : 'false');

	/* ClamAV mode */
	$havp_config[F_USECLAMD] = $pfconf[F_USECLAMD];

	/* Proxy */
	$havp_config[F_PROXYMODE] = $pfconf[F_PROXYMODE] ?: 'standard';
	// TODO: Add check for Squid transparent
	$havp_config[F_PROXYINTERFACE] = $pfconf[F_PROXYINTERFACE];
	// TODO: Add check for Squid proxy port
	$havp_config[F_PROXYPORT] = $pfconf[F_PROXYPORT] ?: HVDEF_PROXYPORT;

	/* Parent proxy */
	// [F_PARENTPROXY] = "proxy_ip:port"
	$pfconf[F_PARENTPROXY] = trim($pfconf[F_PARENTPROXY]);
	if (!empty($pfconf[F_PARENTPROXY])) {
		$parent = explode(":", trim($pfconf[F_PARENTPROXY]));
		$havp_config[F_PARENTPROXY] = array('ip' => $parent[0], 'port' => $parent[1]);
	} else {
		$havp_config[F_PARENTPROXY] = '';
	}

	/* Language */
	$havp_config[F_LANGUAGE] = trim($pfconf[F_LANGUAGE]);

	/* HAVP proxy settings */
	$havp_config[F_ENABLEFORWARDEDIP] = ($pfconf[F_ENABLEFORWARDEDIP] === 'on' ? 'true' : 'false');
	$havp_config[F_ENABLEXFORWARDEDFOR] = ($pfconf[F_ENABLEXFORWARDEDFOR] === 'on' ? 'true' : 'false');
	$havp_config[F_MAXDOWNLOADSIZE]	= (is_numeric($pfconf[F_MAXDOWNLOADSIZE]) ? $pfconf[F_MAXDOWNLOADSIZE] : 0);
	$havp_config[F_RANGE] = ($pfconf[F_RANGE] === 'on' ? 'true' : 'false' );
	$havp_config[F_ENABLERAMDISK] = ($pfconf[F_ENABLERAMDISK] === 'on' ? 'true' : 'false');
	// Whitelist
	$havp_config[F_WHITELIST] = base64_decode($pfconf[F_WHITELIST]);
	$havp_config[F_WHITELIST] = str_replace(";", "\n", $havp_config[F_WHITELIST]);
	$havp_config[F_WHITELIST] = str_replace(";", " ", $havp_config[F_WHITELIST]);
	// Blacklist
	$havp_config[F_BLACKLIST] = base64_decode($pfconf[F_BLACKLIST]);
	$havp_config[F_BLACKLIST] = str_replace(";", "\n", $havp_config[F_BLACKLIST]);
	$havp_config[F_BLACKLIST] = str_replace(";", " ", $havp_config[F_BLACKLIST]);

	/*
	* ------------------------------------------------------------------------------
	* Temp RAMDisk
	* ------------------------------------------------------------------------------
	* Use RAMDisk only if capacity > calculated [MAXSCANSIZE * 50 connections]
	* Set up temp dir accordingly
	*/
	$havp_config[HV_SCANTEMPFILE] = HVDEF_HAVPTEMP_DIR . HVDEF_SCANTEMPFILE;
	if ($havp_config[F_ENABLERAMDISK] === 'true') {
		$sys_capacity = get_memory();
		$mem_capacity = intval($sys_capacity[0]) / 4; // [MB]
		$calculated = 50 * $havp_config[F_SCANMAXSIZE] / (1024 * 1024); // [MB]
	}
	/*
	* This restriction is required for balancing between pfSense and HAVP work speed
	* We cannot allocate memory at the expense of other services running on pfSense
	*/
	if ($mem_capacity > $calculated) {
		// Redefine temp file to RAM Disk
		$havp_config[HV_SCANTEMPFILE] = HVDEF_RAMTEMP_DIR . HVDEF_SCANTEMPFILE;
	} else {
		log_error("HAVP: RAMDisk not used. Diagnostic: system {$sys_capacity[0]}MB, available {$mem_capacity}MB, calculated {$calculated}MB. Try reducing 'MAXSCANSIZE' value.");
	}

	/* Scanner */
	$havp_config[F_FAILSCANERROR] = ( $pfconf[F_FAILSCANERROR] === 'on' ? 'true' : 'false' );
	$havp_config[F_SCANMAXSIZE] = ( is_numeric($pfconf[F_SCANMAXSIZE]) ? $pfconf[F_SCANMAXSIZE] : HVDEF_MAXSCANSIZE ) * 1024; // KB -> Byte
	$havp_config[F_SCANIMG] = ( $pfconf[F_SCANIMG] === 'on' ? 'true' : 'false' );
	$havp_config[F_SCANARC]	= ( $pfconf[F_SCANARC] === 'on' ? 'true' : 'false' );
	$havp_config[F_SCANSTREAM] = ( $pfconf[F_SCANSTREAM] === 'on' ? 'true' : 'false' );
	$havp_config[F_SCANBROKENEXE] = ( $pfconf[F_SCANBROKENEXE] === 'on' ? 'true' : 'false' );
	$havp_config[F_SCANARCMAXSIZE] = ( is_numeric($pfconf[F_SCANARCMAXSIZE]) ? $pfconf[F_SCANARCMAXSIZE] : HVDEF_MAXARCSCANSIZE );

	/* Log */
	$havp_config[F_SYSLOG] = ($pfconf[F_SYSLOG] === 'on' ? 'true' : 'false');
	$havp_config[F_LOG] = ($pfconf[F_LOG] === 'on' ? 'true' : 'false');

	/*
	* ------------------------------------------------------------------------------
	* Internal variables
	* ------------------------------------------------------------------------------
	*/
	/* Proxy */
	$havp_config[F_PROXYBINDIFACE]	= 'localhost';
	/* Language template files path */
	$lng = $havp_config[F_LANGUAGE]	? $havp_config[F_LANGUAGE] : "en";
	$havp_config[F_TEMPLATEPATH]	= (file_exists(HVDEF_TEMPLATES_EX . "/$lng") ? HVDEF_TEMPLATES_EX : HVDEF_TEMPLATES );
	$havp_config[F_TEMPLATEPATH]	.= "/$lng";
	/* AV settings */
	$pf_avset_conf = $config['installedpackages'][HVFORM_AVSET]['config'][0];
	$havp_config[F_HAVPUPDATE] = $pf_avset_conf[F_HAVPUPDATE];
	$havp_config[F_DBREGION] = $pf_avset_conf[F_DBREGION];
	$havp_config[F_AVUPDATESERVER] = $pf_avset_conf[F_AVUPDATESERVER];
	/* AV log */
	$havp_config[F_AVSETSYSLOG] = $pf_avset_conf[F_AVSETSYSLOG] === 'on' ? 'true' : 'false';
	$havp_config[F_AVSETLOG] = $pf_avset_conf[F_AVSETLOG] === 'on' ? 'true' : 'false';

	/* Store HAVP config cache */
	$cfg_xml = dump_xml_config($havp_config, 'havp');
	file_put_contents(HVDEF_HAVP_XMLCONF, $cfg_xml);

	return $havp_config;
}
/*
* ------------------------------------------------------------------------------
* Configuration
* ------------------------------------------------------------------------------
*/
/* HAVP config */
function havp_config_havp() {
	global $havp_config;

	$conf = array();
	$conf[] = <<< EOF
# ============================================================
# HAVP config file
# This file generated with HAVP configurator (part of pfSense)
# DO NOT EDIT manually, changes will be overwritten!
# (C) 2008 Serg Dvoriancev
# email: dv_serg@mail.ru
# ============================================================
EOF;
	$conf[] = "USER " . HVDEF_USER;
	$conf[] = "GROUP " . HVDEF_GROUP;
	$conf[] = "DAEMON true";
	$conf[] = "PIDFILE " . HVDEF_PID_FILE;
	$conf[] = "\n# For small home use, 8 should be minimum.";
	$conf[] = "# For 500 users corporate use, start at 40.";
	$conf[] = "SERVERNUMBER " . HVDEF_HAVP_MINSRV;
	$conf[] = "MAXSERVERS " . HVDEF_HAVP_MAXSRV;
	// Log
	$conf[] = "\n# log ";
	$conf[] = "ACCESSLOG " . HVDEF_HAVP_ACCESSLOG;
	$conf[] = "ERRORLOG " . ($havp_config[F_LOG] === 'true' ? HVDEF_HAVP_ERRORLOG : "/dev/null");
	// Syslog
	$conf[] = "\n# syslog";
	$conf[] = "USESYSLOG {$havp_config[F_SYSLOG]}";
	$conf[] = "SYSLOGNAME havp";
	$conf[] = "SYSLOGFACILITY daemon";
	$conf[] = "SYSLOGLEVEL " . (HV_DEBUG === 'true' ? "debug" : "info"); // err | warning | info | debug
	// Loglevel
	$conf[] = "\n# Level of HAVP logging\n#  0 = Only serious errors and information\n#  1 = Less interesting information is included";
	$conf[] = "LOG_OKS false"; // false - access_log requests viruses only, true - access_log all requests
	$conf[] = "LOGLEVEL " . ( HV_DEBUG === 'true' ? "1" : "0" ); // 0 - work level, 1 - debug level
	// Temp dir/file
	$conf[] = "\n# temp ";
	$conf[] = "SCANTEMPFILE " . $havp_config[HV_SCANTEMPFILE];
	$conf[] = "TEMPDIR " . HVDEF_TEMP_DIR;
	#
	$conf[] = "\n#";
	$conf[] = "DBRELOAD 180";
	$conf[] = "TRANSPARENT " . ( $havp_config[F_PROXYMODE] === 'transparent' ? "true" : "false" );
	// X-FORWARD, X-FORWARDED-FOR options
	$conf[] = "\n# if HAVP is used as parent proxy by some other proxy, this allows to write the real users IP to log, instead of proxy IP.";
	$conf[] = "FORWARDED_IP " . $havp_config[F_ENABLEFORWARDEDIP];
	$conf[] = "X_FORWARDED_FOR " . $havp_config[F_ENABLEXFORWARDEDFOR];
	// Parent proxy = [proxy:port]
	if (!empty($havp_config[F_PARENTPROXY])) {
		$conf[] = "\n# parent proxy ";
		$conf[] = "PARENTPROXY {$havp_config[F_PARENTPROXY]['ip']}";
		$conf[] = "PARENTPORT {$havp_config[F_PARENTPROXY]['port']}";
	}
	// Proxy listening on
	$conf[] = "\n# havp is listening on ";
	$conf[] = "PORT {$havp_config[F_PROXYPORT]}";
	// Bind to IP address
	$bind_iface = get_real_interface_address($havp_config[F_PROXYBINDIFACE]);
	$conf[] = "BIND_ADDRESS {$bind_iface[0]}";
	// Language template files
	$conf[] = "\n# Path to template files ";
	$conf[] = "TEMPLATEPATH {$havp_config[F_TEMPLATEPATH]}";
	// Whitelist and blacklist
	$conf[] = "\n# whitelist and blacklist";
	$conf[] = "WHITELISTFIRST true";
	$conf[] = "WHITELIST " . HVDEF_HAVP_WHITELIST;
	$conf[] = "BLACKLIST " . HVDEF_HAVP_BLACKLIST;
	// Pass/block files on scanner error
	$conf[] = "\n# block file if error scanning";
	$conf[] = "FAILSCANERROR {$havp_config[F_FAILSCANERROR]}";
	// Scanner timeout
	$conf[] = "\n# scanner ";
	$conf[] = "SCANNERTIMEOUT 10";
	// Scan multimedia streams?
	if ($havp_config[F_SCANSTREAM] === 'true') {
		$conf[] = "\n# always allow range, if stream scan enabled";
		$conf[] = "RANGE true";
		$conf[] = "\n# stream scan enabled";
		$conf[] = "STREAMUSERAGENT Player Winamp iTunes QuickTime Audio RMA/ MAD/ Foobar2000 XMMS";
		$conf[] = "STREAMSCANSIZE 2000";
	} else {
	// Resume downloads?
		$conf[] = "RANGE {$havp_config[F_RANGE]}";
		$conf[] = "\n# stream scan disabled";
		$conf[] = "STREAMSCANSIZE 0";
	}

	// Scan options
	$conf[] = "SCANIMAGES {$havp_config[F_SCANIMG]}";
	$conf[] = "MAXSCANSIZE {$havp_config[F_SCANMAXSIZE]}";
	$conf[] = "KEEPBACKBUFFER 200000";
	$conf[] = "KEEPBACKTIME 5";
	$conf[] = "# After Trickling Time (seconds), some bytes are sent to browser to keep the connection alive";
	$conf[] = "TRICKLING 10";
	$conf[] = "TRICKLINGBYTES 1";
	$conf[] = "# Downloads larger than MAXDOWNLOADSIZE will be blocked.";
	$conf[] = "MAXDOWNLOADSIZE {$havp_config[F_MAXDOWNLOADSIZE]}";
	$conf[] = "\n# ClamAV Library Scanner (libclamav) ";
	$conf[] = "ENABLECLAMLIB " . ($havp_config[F_USECLAMD] !== 'true' ? "true" : "false");
	// Use clamd if configured
	if ($havp_config[F_USECLAMD] === 'true') {
		$conf[] = "\n# Clamd scanner (Clam daemon)";
		$conf[] = "ENABLECLAMD true";
		// Clamd socket
		if (HV_CLAMD_TCPSOCKET === 'true') {
			$conf[] = "CLAMDSERVER 127.0.0.1";
			$conf[] = "CLAMDPORT " . HVDEF_CLAM_TCPSOCKET;
		} else {
			$conf[] = "CLAMDSOCKET " . HVDEF_CLAM_SOCKET;
		}
	}
	$conf[] = "";
	return implode("\n", $conf);
}
/*
* ------------------------------------------------------------------------------
* Clamd config
* ------------------------------------------------------------------------------
*/
function havp_config_clam() {
	global $havp_config;

	$conf = array();
	$conf[] = <<< EOF
# ==============================================================================
# CLAMD config file
# This file generated with HAVP configurator (part of pfSense)
# DO NOT EDIT manually, changes will be overwritten!
# (C) 2008 Serg Dvoriancev
# email: dv_serg@mail.ru
# ==============================================================================
EOF;
	// Log
	$conf[] = "# log";
	$conf[] = "LogFileUnlock yes";
	$conf[] = "LogFileMaxSize 2M";
	$conf[] = "LogTime yes";
	$conf[] = "LogClean no";
	$conf[] = "LogFacility LOG_LOCAL6";
	$conf[] = "LogVerbose " . ( HV_DEBUG === "true" ? "yes" : "no" );
	# Syslog
	$islog = $havp_config[F_AVSETLOG] === 'true';
	$issyslog = $havp_config[F_AVSETSYSLOG] === 'true';
	$conf[] = "LogSyslog " . ($islog && $issyslog ? 'yes' : 'no');
	if ($islog && !$issyslog) {
		$conf[] = "LogFile " . HVDEF_CLAM_LOG;
	}
	// Sysdirs
	$conf[] = "\n# sysdirs";
	$conf[] = "PidFile " . HVDEF_CLAM_PID;
	$conf[] = "TemporaryDirectory " . HVDEF_TEMP_DIR;
	$conf[] = "DatabaseDirectory /var/db/clamav";
	// Socket
	$conf[] = "\n# socket";
	$conf[] = "LocalSocket " . HVDEF_CLAM_SOCKET;
	$conf[] = "FixStaleSocket yes";
	if (HV_CLAMD_TCPSOCKET === 'true') {
		$conf[] = "TCPAddr 127.0.0.1";
		$conf[] = "TCPSocket " . HVDEF_CLAM_TCPSOCKET;
	}
	$conf[] = "MaxConnectionQueueLength 30";
	// Daemon
	$conf[] = "\n# daemon";
	$conf[] = "MaxThreads 100";
	// Scanner
	$conf[] = "\n# scanner";
	$conf[] = "MaxDirectoryRecursion 255";
	$conf[] = "FollowDirectorySymlinks no"; // No need to scan symlinked dirs
	$conf[] = "FollowFileSymlinks yes";
	$conf[] = "# perform a database check.(sec) [3600 sec = 60 min]";
	$conf[] = "SelfCheck 3600";
	$conf[] = "# detect possibly unwanted applications.";
	$conf[] = "DetectPUA no"; // Possibly unwanted applications
	$conf[] = "AlgorithmicDetection yes";
	// Broken executables scanning
	$conf[] = "# executable";
	if ($havp_config[F_SCANBROKENEXE] === 'true') {
		$conf[] = "DetectBrokenExecutables yes";
	} else {
		$conf[] = "DetectBrokenExecutables no";
	}
	// Other scanner options
	$conf[] = "ScanPE yes";
	$conf[] = "ScanELF yes";
	$conf[] = "# documents";
	$conf[] = "ScanOLE2 yes";
	$conf[] = "ScanPDF yes";
	$conf[] = "# email";
	$conf[] = "ScanMail yes";
	$conf[] = "MailFollowURLs no";
	$conf[] = "PhishingSignatures yes";
	$conf[] = "PhishingScanURLs yes";
	$conf[] = "PhishingAlwaysBlockSSLMismatch no";
	$conf[] = "PhishingAlwaysBlockCloak no";
	$conf[] = "# html";
	$conf[] = "ScanHTML yes";
	$conf[] = "# archives";
	$conf[] = "ScanArchive yes";
	$conf[] = "ArchiveBlockEncrypted no";
	$conf[] = "# limits";
	$conf[] = "MaxScanSize 50M";
	$conf[] = "MaxFileSize 30M";
	$conf[] = "MaxRecursion 255";
	$conf[] = "MaxFiles 10000";
	// User/Group
	$conf[] = "\n# system";
	$conf[] = "User root"; // HVDEF_USER; must have full access to files for scan
	$conf[] = "AllowSupplementaryGroups yes";
	$conf[] = "Debug " . (HV_DEBUG === 'true' ? "yes" : "no");
	$conf[] = "";
	return implode("\n", $conf);
}
/*
* ------------------------------------------------------------------------------
* FreshClam config
* ------------------------------------------------------------------------------
*/
function havp_config_freshclam() {
	global $havp_config;
	$pfconf = $havp_config;
	$conf = array();

	$conf[] = <<< EOF
# ==============================================================================
# Freshclam config file
# This file generated with HAVP configurator (part of pfSense)
# DO NOT EDIT manually, changes will be overwritten!
# (C) 2008 Serg Dvoriancev
# email: dv_serg@mail.ru
# ==============================================================================
EOF;
	$conf[] = "DatabaseDirectory /var/db/clamav";
	// Log
	$conf[] = "LogFileMaxSize 2M";
	$conf[] = "LogTime yes";
	$conf[] = "LogVerbose " . ( HV_DEBUG === "true" ? "yes" : "no" );
	$conf[] = "LogFacility LOG_LOCAL6"; // LOG_LOCAL6 | LOG_MAIL
	// Syslog
	$conf[] = "\n# syslog";
	$is_syslog = ($pfconf[F_AVSETLOG] === 'true') && ($pfconf[F_AVSETSYSLOG] === 'true');
	$conf[] = "LogSyslog " . ( $is_syslog ? 'yes' : 'no');
	unset ($is_syslog);
	// Update log
	$conf[] = "UpdateLogFile " . HVDEF_FRESHCLAM_LOG;
	// Other options
	$conf[] = "\n# pid";
	$conf[] = "PidFile /var/run/clamav/freshclam.pid";
	$conf[] = "\n# db";
	$conf[] = "DatabaseOwner havp";
	$conf[] = "AllowSupplementaryGroups yes";
	$conf[] = "DNSDatabaseInfo current.cvd.clamav.net";

	$avsrv = $pfconf[F_AVUPDATESERVER];
	$avsrv = explode(" ", trim($avsrv));

	foreach ($avsrv as $asr) {
		if (!empty($asr)) {
			$conf[] = "DatabaseMirror $asr";
		}
	}

	// Regional mirrors
	if (!empty($pfconf[F_DBREGION])) {
		$conf[] = '# regional db';
		switch($pfconf[F_DBREGION]) {
			case 'au': $conf[] = "DatabaseMirror db.au.clamav.net"; break; // Australia
			case 'ca': $conf[] = "DatabaseMirror db.ca.clamav.net"; break; // Canada
			case 'cn': $conf[] = "DatabaseMirror db.cn.clamav.net"; break; // China
			case 'eu': $conf[] = "DatabaseMirror db.europe.clamav.net"; break; // Europe
			case 'id': $conf[] = "DatabaseMirror db.id.clamav.net"; break; // Indonesia
			case 'jp': $conf[] = "DatabaseMirror db.jp.clamav.net"; break; // Japan
			case 'kr': $conf[] = "DatabaseMirror db.kr.clamav.net"; break; // Korea
			case 'ml': $conf[] = "DatabaseMirror db.ml.clamav.net"; break; // Malaysia
			case 'ru': $conf[] = "DatabaseMirror db.ru.clamav.net"; break; // Russia
			case 'sa': $conf[] = "DatabaseMirror db.sa.clamav.net"; break; // South Africa
			case 'tw': $conf[] = "DatabaseMirror db.tw.clamav.net"; break; // Taiwan
			case 'uk': $conf[] = "DatabaseMirror db.uk.clamav.net"; break; // United kingdom
			case 'us': $conf[] = "DatabaseMirror db.us.clamav.net"; break; // United states
			default: break;
		}
	}

	$conf[] = "DatabaseMirror db.at.clamav.net";
	$conf[] = "DatabaseMirror db.au.clamav.net";
	$conf[] = "DatabaseMirror db.ba.clamav.net";
	$conf[] = "DatabaseMirror db.be.clamav.net";
	$conf[] = "DatabaseMirror db.ca.clamav.net";
	$conf[] = "DatabaseMirror db.ch.clamav.net";
	$conf[] = "DatabaseMirror db.cn.clamav.net";
	$conf[] = "DatabaseMirror db.cr.clamav.net";
	$conf[] = "DatabaseMirror db.cy.clamav.net";
	$conf[] = "DatabaseMirror db.cz.clamav.net";
	$conf[] = "DatabaseMirror db.de.clamav.net";
	$conf[] = "DatabaseMirror db.dk.clamav.net";
	$conf[] = "DatabaseMirror db.ec.clamav.net";
	$conf[] = "DatabaseMirror db.ee.clamav.net";
	$conf[] = "DatabaseMirror db.es.clamav.net";
	$conf[] = "DatabaseMirror db.fi.clamav.net";
	$conf[] = "DatabaseMirror db.fr.clamav.net";
	$conf[] = "DatabaseMirror db.gr.clamav.net";
	$conf[] = "DatabaseMirror db.hk.clamav.net";
	$conf[] = "DatabaseMirror db.hu.clamav.net";
	$conf[] = "DatabaseMirror db.id.clamav.net";
	$conf[] = "DatabaseMirror db.ie.clamav.net";
	$conf[] = "DatabaseMirror db.it.clamav.net";
	$conf[] = "DatabaseMirror db.jp.clamav.net";
	$conf[] = "DatabaseMirror db.kr.clamav.net";
	$conf[] = "DatabaseMirror db.li.clamav.net";
	$conf[] = "DatabaseMirror db.lt.clamav.net";
	$conf[] = "DatabaseMirror db.lv.clamav.net";
	$conf[] = "DatabaseMirror db.mt.clamav.net";
	$conf[] = "DatabaseMirror db.my.clamav.net";
	$conf[] = "DatabaseMirror db.ml.clamav.net";
	$conf[] = "DatabaseMirror db.no.clamav.net";
	$conf[] = "DatabaseMirror db.pl.clamav.net";
	$conf[] = "DatabaseMirror db.pt.clamav.net";
	$conf[] = "DatabaseMirror db.ro.clamav.net";
	$conf[] = "DatabaseMirror db.ru.clamav.net";
	$conf[] = "DatabaseMirror db.se.clamav.net";
	$conf[] = "DatabaseMirror db.sk.clamav.net";
	$conf[] = "DatabaseMirror db.th.clamav.net";
	$conf[] = "DatabaseMirror db.tr.clamav.net";
	$conf[] = "DatabaseMirror db.tw.clamav.net";
	$conf[] = "DatabaseMirror db.ua.clamav.net";
	$conf[] = "DatabaseMirror db.uk.clamav.net";
	$conf[] = "DatabaseMirror db.za.clamav.net";

	$conf[] = "\n# DO NOT TOUCH the following line ";
	$conf[] = "DatabaseMirror database.clamav.net";
	// Updates frequency
	$conf[] = "\n# Number of database checks per day. Default: 12 (every two hours)";
	$chks = 0;
	$conf[] = "Checks $chks";
	// Notifications
	$conf[] = "# notification";
	$conf[] = "OnUpdateExecute /bin/date \"+%Y.%m.%d %H:%M:%S Antivirus update success\" > " . HVDEF_FRESHCLAM_STATUS_FILE;
	$conf[] = "OnErrorExecute /bin/date \"+%Y.%m.%d %H:%M:%S Antivirus update error\" > "  . HVDEF_FRESHCLAM_STATUS_FILE;
	// Debug
	$conf[] = "Debug " . (HV_DEBUG === 'true' ? "yes" : "no");

	/*
	* ------------------------------------------------------------------------------
	* TODO: Proxy settings, GUI notifications...
	* ------------------------------------------------------------------------------
	$conf[] = <<< EOF
# Proxy settings
#HTTPProxyServer myproxy.com
#HTTPProxyPort 1234
#HTTPProxyUsername myusername
#HTTPProxyPassword mypass

# Make GUI display errors
# Run command when database update process fails.
# Default: disabled
#OnErrorExecute command

# Run command when freshclam reports outdated version.
# In the command string %v will be replaced by the new version number.
# Default: disabled
#OnOutdatedExecute command
EOF;
	* ------------------------------------------------------------------------------
	*/

	// Use Google Safebrowsing database
	$conf[] = "SafeBrowsing yes";

	$conf[] = "";
	return implode("\n", $conf);
}
/*
* ------------------------------------------------------------------------------
* Configure Squid
* ------------------------------------------------------------------------------
*/
function havp_configure_squid() {
	global $config, $havp_config;
	$new_opt = array();
	$on_configure = ($havp_config[F_PROXYMODE] === 'squid' ? true : false);

	if (!isset($config['installedpackages']['squid']['config'][0]['custom_options'])) {
		return;
	}

	if ($on_configure === true) {
		$new_opt[] = "never_direct allow all";
		$new_opt[] = "cache_peer 127.0.0.1 parent {$havp_config[F_PROXYPORT]} 0 name=havp no-query no-digest no-netdb-exchange default";
	}

	/* Copy options, but not 'cache_peer' option */
	$cust_opt = explode(";", $config['installedpackages']['squid']['config'][0]['custom_options']);
	foreach($cust_opt as $key => $val) {
		if (strpos($val, "never_direct") !== false) {
			continue;
		}
		if (strpos($val, "cache_peer 127.0.0.1 parent") !== false) {
			continue;
		}
		$new_opt[] = $val;
	}

	$new_opt = implode(";", $new_opt);
	if (file_exists('/usr/local/pkg/squid.inc')) {
		// Squid config update
		$config['installedpackages']['squid']['config'][0]['custom_options'] = $new_opt;

		// Disable upstream proxy
		if ($on_configure === true) {
			$config['installedpackages']['squidupstream']['config'][0]['proxy_forwarding'] = '';
		}

		write_config('HAVP: Updated redirector options in Squid config.');

		require_once('squid.inc');
		squid_resync();
	}
}
/*
* ------------------------------------------------------------------------------
* Default whitelist
* ------------------------------------------------------------------------------
*/
function havp_whitelist_def() {
	$whitelist = array();

	$whitelist[] = "*sourceforge.net/*clamav-*";
	$whitelist[] = "*pfsense.org/*";
	// Microsoft & Windows Update
	$whitelist[] = "*.microsoft.com/*";
	$whitelist[] = "*.windowsupdate.com/*";
	// Media and image extensions
	$whitelist[] = "*/*.gif\n*/*.swf\n*/*.png\n*/*.jpg\n*/*.jpeg\n*/*.mov\n*/*.avi\n*/*.flv\n*/*.bmp\n*/*.ico\n*/*.pdf\n*/*.mp3\n*/*.wma\n*/*.wmv\n*/*.ogg";

	return implode("\n", $whitelist);
}
/*
* ==============================================================================
* Utils
* ==============================================================================
*/
function havp_set_file_access($dir, $owner, $mod) {
	if (file_exists($dir)) {
		mwexec("/usr/bin/chgrp -R -v $owner $dir");
		mwexec("/usr/sbin/chown -R -v $owner $dir");
		if (!empty($mod)) {
			mwexec( "/bin/chmod -R -v $mod $dir");
		}
	}
}

function get_real_interface_address($iface) {
	global $config;

	if ($iface === 'localhost') {
		return array('127.0.0.1', '');
	}

	$iface = convert_friendly_interface_to_real_interface_name($iface);
	$line = trim(shell_exec("/sbin/ifconfig $iface | /usr/bin/grep inet | /usr/bin/grep -v inet6"));
	list($dummy, $ip, $dummy2, $netmask) = explode(" ", $line);

	return array($ip, long2ip(hexdec($netmask)));
}
/*
* -------------------------------------------------------------------------------
* Check blacklist/whitelist domains
* -------------------------------------------------------------------------------
*/
// Lines can hold URLs with wildcards with following rules:
// Line must contain domain/path
// Domains may begin with a wildcard
// Paths may begin and/or end with a wildcard
// URLs without wildcards are exact match
// Examples:
// (1) www.server-side.de	(Only this URL is whitelisted)
// (2) www.server-side.de/*	(Domain is completely whitelisted)
// (3) *server-side.de/index.html
// (4) */*.gif			(All .gif files are whitelisted)
// (5) www.server-side.de/novirus*
// (6) www.server-side.de/*novirus*
/*
* -------------------------------------------------------------------------------
*/
function check_bw_domain($_dm) {
	$domain = "";
	$path = "";

	if (!is_string($_dm)) {
		return false;
	}

	$pos = strpos($_dm, "/");
	if ($pos === false) {
		$domain = $_dm;
		$path = "";
	} else {
		$domain = substr($_dm, 0, $pos);
		$path = substr($_dm, $pos+1);
	}

	// Domains may begin with a wildcard: '*domain.xx' - *my.domain.com
	// Paths may begin and/or end with a wildcard: '*xxx*'
	// Regex: * - {0,}; + - {1,}; ? = {0,1}
	$df = "[a-zA-Z0-9\-]";
	$dm_fmt = "/^((\*)|(\*\.))?($df+\.)+$df{2,}$/i"; // d.com *d.com *.d.com
	$ph_fmt = "/^((\*)|((\*)?([^\*]+)(\*)?))$/i"; // *path*

	if (empty($path)) {
		// d.com *d.com *.d.com
		return preg_match($dm_fmt, $domain);
	} else {
		if (!empty($domain)) {
			return (($domain === '*') || preg_match($dm_fmt, $domain)) && preg_match($ph_fmt, $path);
		}
	}

	return false;
}
/*
* ------------------------------------------------------------------------------
* Filter rules
* ------------------------------------------------------------------------------
*/
function havp_generate_rules($type = 'filter') {

	global $config, $havp_config;
	$rules = array();

	// Do not configure any rules if HAVP is disabled
	if ($havp_config[F_ENABLE] !== 'true') {
		return '';
	}

	$proxymode = $havp_config[F_PROXYMODE];
	/*
	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	* HAVP always listens on 127.0.0.1:port
	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	* Proxy mode:
	* Standard		- Filter: rdr ifaces:port => 127.0.0.1:port
	* Parent for Squid	- Filter: No
	* Transparent		- Filter: rdr ifaces:port => 127.0.0.1:port;
	*			rdr any http => 127.0.0.1:port + allow http traffic via iface
	*			If Squid transparent, then as Standard.
	* Internal		- Filter: No
	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	*/

	$proxybindiface = 'lo0'; // 127.0.0.1
	$ifaces = array_map('convert_friendly_interface_to_real_interface_name', explode(',', $havp_config[F_PROXYINTERFACE]));
	$proxyport = ($havp_config[F_PROXYPORT] ? $havp_config[F_PROXYPORT] : HVDEF_PROXYPORT);

	// Squid already transparent
	$squid_transparent_proxy = ($config['installedpackages']['squid']['config'][0]['transparent_proxy'] == 'on');
	if (($proxymode === 'transparent') && $squid_transparent_proxy) {
		$proxymode = 'standard';
		log_error("HAVP: Squid is already configured as transparent proxy. Use 'Standard' proxy mode.");
	}

	// NAT
	if ($type == 'nat') {
		$rules[] = "";
		$rules[] = "# havp proxy ifaces redirect";
		foreach ($ifaces as $iface) {
			switch ($proxymode) {
				case 'transparent':
					// rdr any http => localhost:port
					$rules[] = "rdr on $iface proto tcp from any to !($iface) port 80 -> $proxybindiface port $proxyport";
				case 'standard':
				case 'squid':
					// rdr iface:port => localhost:port
					$rules[] = "rdr on $iface proto tcp from any to ($iface) port $proxyport -> $proxybindiface port $proxyport";
					break;
				// No more rdr
				case 'internal':
				default: break;
			}
		}
		$rules[] = "";
	}

	// Filter
	if ($type == 'filter' || $type == 'rule') {
		$rules[] = "";
		$rules[] = "# havp proxy ifaces rules";
		foreach ($ifaces as $iface) {
			switch ($proxymode) {
				case 'transparent':
					// Pass http on iface
					$rules[] = "pass in quick on $iface proto tcp from any to !($iface) port 80 flags S/SA keep state";
					break;
				// No more rules
				case 'standard':
				case 'squid':
				case 'internal':
				default: break;
			}
		}
		$rules[] = "";
	}

	return implode("\n", $rules);
}

function havp_filter_update() {
	$newrules = array();
	$newrules[] = "# HAVP Rules Start";
	$newrules[] = havp_generate_rules('nat');
	$newrules[] = havp_generate_rules('filter');
	$newrules[] = "# HAVP Rules End";
	$newrules[] = "";
	return implode("\n", $newrules);
}

/* AV update script */
function havp_update_AV() {
	file_put_contents(HVDEF_AVUPD_SCRIPT, havp_AVupdate_script());
	havp_set_file_access(HVDEF_AVUPD_SCRIPT, HVDEF_AVUSER, '0755');
	// Run update in background
	mwexec_bg(HVDEF_AVUPD_SCRIPT);
}
/*
* ==============================================================================
* Scripts
* ==============================================================================
*/
/* AV update script */
function havp_AVupdate_script() {
	$f = HVDEF_UPD_STATUS_FILE;
	$u = HVDEF_FRESHCLAM_STATUS_FILE;
	return <<< EOD
#!/bin/sh
/bin/date +"%Y.%m.%d %H:%M:%S Antivirus update started." > $f
/bin/date +"%Y.%m.%d %H:%M:%S Antivirus database already is updated." > $u
/usr/local/bin/freshclam
wait
cat $u >> $f
/usr/local/bin/sigtool --unpack-current daily.cvd
/usr/local/bin/sigtool --unpack-current main.cvd
wait
/bin/date +"%Y.%m.%d %H:%M:%S Antivirus update end." >> $f
EOD;

}

/* HAVP service startup script */
function havp_startup_script() {
	global $havp_config;
	$pid = HVDEF_PID_FILE;
	$havpchk = "/bin/ps auxw | /usr/bin/grep \"[h]avp -c\" | /usr/bin/awk '{print $2}'";
	$clamdchk = "/bin/ps auxw | /usr/bin/grep \"[c]lamd -c\" | /usr/bin/awk '{print $2}'";

	/* Create rc script */
	$rc = array();
	$rc['file'] = basename(HVDEF_HAVP_STARTUP_SCRIPT);

	$s[] = "\t# init";
	$s[] = "\techo 'Starting ..' > " . HVDEF_HAVP_STATUS_FILE;

	$s[] = "\t# start";
	$s[] = "\tif [ -z \"`{$havpchk}`\" ]; then";
	if ($havp_config[F_USECLAMD] === 'true') {
		$clampid_dir = HVDEF_CLAM_RUNDIR;
		$s[] = "\t\t# start clamd before (to be sure)";
		$s[] = "\t\t" . HVDEF_CLAM_STARTUP_SCRIPT . " start";
		$s[] = "\t\tsleep 2";
		$s[] = "";

		$s[] = "\t\t# if clamd started";
		$s[] = "\t\tif [ -n \"`{$clamdchk}`\" ]; then";
		$s[] = "\t\t\t# Waiting for ClamD";
		$s[] = "\t\t\techo -n \"Waiting for ClamD \"";
		$s[] = "\t\t\techo 'Waiting for ClamD' > " . HVDEF_HAVP_STATUS_FILE;
		$s[] = "\t\t\twhile [ \"`{$clamdchk}`\" != \"`/bin/cat {$clampid_dir}/clamd.pid`\" ]; do";
		$s[] = "\t\t\t\techo -n '.'";
		$s[] = "\t\t\t\tsleep 1";
		$s[] = "\t\t\tdone";
		$s[] = "\t\t\techo";
		$s[] = "\t\tfi";
		$s[] = "";
	}
	$s[] = "\t\t/usr/local/sbin/havp -c " . HVDEF_HAVP_CONFIG . " 2>/dev/null";
	$s[] = "\t\twait";
	$s[] = "\tfi";

	$s[] = "\t# Status";
	$s[] = "\tif [ -z \"`{$havpchk}`\" ]; then";
	$s[] = "\t\techo 'Stopped' > " . HVDEF_HAVP_STATUS_FILE;
	$s[] = "\telse";
	$s[] = "\t\techo 'Started' > " . HVDEF_HAVP_STATUS_FILE;
	$s[] = "\tfi";

	$s[] = "";
	$rc['start'] = implode("\n", $s);
	unset($s);

	$s[] = "# stop";
	$s[] = "\t /usr/bin/killall havp 2>/dev/null";
	$s[] = "\t sleep 2";
	$s[] = "\t /usr/bin/killall -9 havp 2>/dev/null";
	$s[] = "\t wait";
	$s[] = "\t echo 'Stopped' > " . HVDEF_HAVP_STATUS_FILE;
	$s[] = "";
	$rc['stop'] = implode("\n", $s);
	unset($s);

	// We don't use start if HAVP is disabled
	if ($havp_config[F_ENABLE] !== 'true') {
		$rc['start'] = "\t echo 'Disabled' > " . HVDEF_HAVP_STATUS_FILE;
	}

	write_rcfile($rc);
}

/* ClamD service startup script */
function hv_clamd_startup_script() {
	global $havp_config;
	$pid = HVDEF_CLAM_PID;
	$clamdchk = "/bin/ps auxw | /usr/bin/grep \"[c]lamd -c\" | /usr/bin/awk '{print $2}'";

	/* Create rc script */
	$rc = array();
	$rc['file'] = basename(HVDEF_CLAM_STARTUP_SCRIPT);
	$s[] = "\t\techo 'Starting..' > " . HVDEF_CLAM_STATUS_FILE;

	$s[] = "# start";
	$s[] = "\tif [ -z \"`{$clamdchk}`\" ]; then";
	$s[] = "\t\t/usr/local/sbin/clamd -c " . HVDEF_CLAM_CONFIG . " 2>/dev/null";
	$s[] = "\t\twait";
	$s[] = "\tfi";
	$s[] = "\techo 'Started' > " . HVDEF_CLAM_STATUS_FILE;
	$s[] = "";
	$rc['start'] = implode("\n", $s);
	unset($s);

	$s[] = "#stop";
	$s[] = "\t /usr/bin/killall clamd 2>/dev/null";
	$s[] = "\t sleep 2";
	$s[] = "\t /usr/bin/killall -9 clamd 2>/dev/null";
	$s[] = "\t wait";
	$s[] = "\t\techo 'Stopped' > " . HVDEF_CLAM_STATUS_FILE;
	$s[] = "";
	$rc['stop'] = implode("\n", $s);
	unset($s);

	write_rcfile($rc);
}

/*
* ==============================================================================
* RAM Disk
* ==============================================================================
*/
function mountRAMdisk($free_and_mount = true) {
	global $havp_config;
	$mnt_point = HVDEF_RAMTEMP_DIR;
	$mnt_flag_file = "$mnt_point/.mnt";

	/* RAM Disk disabled */
	if (HV_USE_TMPRAMDISK !== 'true') {
		umountRAMDisk();
		return;
	}

	/* RAM Disk on VM disabled */
	if ((HV_VM_TMPRAMDISK !== 'true') && VMWare_detect()) {
		umountRAMDisk();
		log_error("havp: RAMDisk on VM disabled.");
		return;
	}

	/* Free RAMDisk only */
	if ($free_and_mount !== true) {
		umountRAMDisk();
		return;
	}

	/* Temp RAMDisk */
	// Note: Use 1/4 of system memory capacity
	$ramdisk_capacity = get_memory();
	$ramdisk_capacity = intval(intval($ramdisk_capacity[0]) / 4); // [MB]

	/* RAMDisk already exists? */
	if (file_exists("/dev/md10")) {
		return;
	}

	/* Create and mount a swap backed file system on /var/tmp/havp by /dev/md10: */
	// mwexec("mdconfig -a -t swap -s {$ramdisk_capacity}M -u 10");
	// mwexec("newfs -U /dev/md10");
	// mwexec("mount /dev/md10 $mnt_point");
	/* RAM - faster, uses physical RAM */
	mwexec("/sbin/mdmfs -s {$ramdisk_capacity}M md10 {$mnt_point}");
	mwexec("/bin/chmod 1777 {$mnt_point}");

	/* Create flag file */
	file_put_contents($mnt_flag_file, "{$ramdisk_capacity}");
	/* syslog */
	if (HV_DEBUG === 'true') {
		log_error("HAVP: Create RAMDisk {$ramdisk_capacity}Mb.");
	}
}


function umountRAMDisk() {
	global $havp_config;

	/* Detach and free all resources used by /dev/md10 */
	mwexec("/sbin/umount -f " . HVDEF_RAMTEMP_DIR);
	mwexec("/sbin/mdconfig -d -u 10");
}

/*
* ==============================================================================
* Utilites
* ==============================================================================
*/
function VMWare_detect() {
	global $g;
	$fc = '';

	if (file_exists("{$g['varlog_path']}/dmesg.boot") !== false) {
		$fc = file_get_contents("{$g['varlog_path']}/dmesg.boot");
	}

	return (strpos($fc, "<VMware Virtual") !== false);
}

/* ------------------------------------------------------------------------------ */
function start_antivirus_scanner($filename) {
	$param = array();
	// $param[] = "-v"; // verbose
	if (HV_DEBUG === 'true') {
		$param[] = "--debug";			// debug option
	} else {
		$param[] = "--quiet";			// output only errors
	}
	$param[] = "--stdout";				// Write to stdout instead of stderr
	// $param[] = "--no-summary";			// Disable summary at end of scanning
	$param[] = "-i";				// Only print infected files
	$param[] = "--tempdir=" . HVDEF_TEMP_DIR;	// Create temporary files in DIRECTORY
	// $param[] = "-d FILE/DIR";			// Load virus database from FILE or load all .cvd and .db[2] files from DIR
	$param[] = "-l " . HVDEF_CLAMSCAN_LOG;		// Save scan report to FILE
	$param[] = "-r";				// Scan subdirectories recursively
	$param[] = "--remove";				// Remove infected files. Be careful!
	$param[] = "--detect-broken";			// Try to detect broken executable files
	$param[] = "--max-filesize=10000000";		// Files larger than this will be skipped and assumed clean
	$param[] = "--max-scansize=5000000";		// The maximum amount of data to scan for each container file (*)
	$param[] = "--max-files=10000";			// The maximum number of files to scan for each container file (*)
	$param[] = "--max-recursion=255";		// Maximum archive recursion level for container file (*)
	$param[] = "--max-dir-recursion=255";		// Maximum directory recursion level

	$param = implode(" ", $param);
	if ($havp_config[F_USECLAMD] === 'true') {
		$param = "clamdscan $param $filename";	// use clamd daemon (faster)
	} else {
		$param = "clamscan $param $filename";
	}

	// debug clamscan cmd
	if (HV_DEBUG === 'true') {
		file_put_contents("/tmp/clamscan.cmd", $param);
	}

	if (file_exists($filename)) {
		log_error("Antivirus: Starting file '$filename' scan. Log file is '" . HVDEF_CLAMSCAN_LOG . "'. Wait 5-10 minutes.");

		// Put file scan to log
		$cont = "Starting scan file {$filename}\n";
		file_put_contents(HVDEF_CLAMSCAN_LOG, $cont);

		mwexec_bg("$param");
		exec("/bin/date +\"%Y.%m.%d %H:%M:%S Starting scan of {$filename}.\" > " . HVDEF_CLAMSCAN_LOG);
	} else {
		log_error("Antivirus: Cannot scan file: {$filename} does not exist.");
	}
}

/*
* ------------------------------------------------------------------------------
* HTML
* ------------------------------------------------------------------------------
*/
function havp_fscan_html() {
	global $g;
	$clamscan_log = HVDEF_CLAMSCAN_LOG;

	return <<< EOD
<hr />
<span onclick="document.getElementById('scanfilepath').value = '/var/squid';" style="cursor: pointer;">
	<img src='./themes/{$g['theme']}/images/icons/icon_pass.gif' title='Click here' alt=''>
		<span style='text-decoration: underline;'>&nbsp;Squid cache path (scan your Squid cache now).</span>
	</img>
</span>
<br />
<span onclick="document.getElementById('scanfilepath').value = '/var/db';" style="cursor: pointer;">
	<img src='./themes/{$g['theme']}/images/icons/icon_pass.gif' title='Click here' alt=''>
		<span style='text-decoration: underline;'>&nbsp;Common DB path.</span>
	</img>
</span>
<br />
<span onclick="document.getElementById('scanfilepath').value = '/tmp';" style="cursor: pointer;">
	<img src='./themes/{$g['theme']}/images/icons/icon_pass.gif' title='Click here' alt=''>
		<span style='text-decoration: underline;'>&nbsp;Temp path.</span>
	</img>
</span>
<hr />
<input name='submit' type='submit' value='Start_scan' /><br />
Press button to start AV scanner now. After 5-10 minutes look at the log file '{$clamscan_log}'.<br />
In Diagnostics - Command Prompt - Execute Shell command: <strong>'/bin/cat {$clamscan_log}'</strong>)
EOD;

}

/*
* ==============================================================================
* Status, widgets
* ==============================================================================
*/
function havp_get_scan_log() {
	$s = '';
	$clamscanlog = "/var/log/clamscan.log";
	if (file_exists($clamscanlog)) {
		$s = file_get_contents("/var/log/clamscan.log");
	}
	if (empty($s)) {
		$s = "Not found.";
	}
	return $s;
}

function havp_get_filescanlist() {
	$slist = array();
	$slist[0]['descr'] = 'Squid cache path (scan you Squid cache now).';
	$slist[0]['path'] = '/var/squid';
	$slist[1]['descr'] = 'Common DB path.';
	$slist[1]['path'] = '/var/db';
	$slist[2]['descr'] = 'Temp path.';
	$slist[2]['path'] = '/tmp';
	return $slist;
}

function havp_get_av_viruslog() {
	$s = array();
	if (file_exists(HVDEF_HAVP_ACCESSLOG)) {
		$log = file_get_contents(HVDEF_HAVP_ACCESSLOG);
		$log = explode("\n", $log);
		$count = 0;
		foreach($log as $ln) {
			if (substr_count(strtolower($ln), "virus clam")) {
				$s[] = $ln;
			}
		}
	}
	return $s;
}

function havp_get_av_statistic() {
	$s = "Unknown.";
	if (file_exists(HVDEF_HAVP_ACCESSLOG)) {
		$log = file_get_contents(HVDEF_HAVP_ACCESSLOG);
		$count = substr_count(strtolower($log), "virus clam");
		$s = "Found $count viruses (total).";
	}
	return $s;
}

?>