<?php
/*
	functions.inc.php
	Copyright (C) 2013-2015 Electric Sheep Fencing, LP
*/

if (Connection_Aborted()) {
	exit;
}

require_once("config.inc");
require_once("pfsense-utils.inc");

function get_stats() {
	$stats['cpu'] = cpu_usage();
	$stats['mem'] = mem_usage();
	$stats['uptime'] = get_uptime();
	$stats['states'] = get_pfstate();
	$stats['temp'] = get_temp();
	$stats['datetime'] = update_date_time();
	$stats['interfacestatistics'] = get_interfacestats();
	$stats['interfacestatus'] = get_interfacestatus();
	$stats['cpufreq'] = get_cpufreq();
	$stats['load_average'] = get_load_average();
	$stats['mbuf'] = get_mbuf();
	$stats['mbufpercent'] = get_mbuf(true);
	$stats['statepercent'] = get_pfstate(true);
	$stats = join("|", $stats);
	return $stats;
}

function get_uptime() {
	$uptime = get_uptime_sec();

	if (intval($uptime) == 0) {
		return;
	}

	$updays = (int)($uptime / 86400);
	$uptime %= 86400;
	$uphours = (int)($uptime / 3600);
	$uptime %= 3600;
	$upmins = (int)($uptime / 60);
	$uptime %= 60;
	$upsecs = (int)($uptime);

	$uptimestr = "";
	if ($updays > 1) {
		$uptimestr .= "$updays Days ";
	} else if ($updays > 0) {
		$uptimestr .= "1 Day ";
	}

	if ($uphours > 1) {
		$hours = "s";
	}

	if ($upmins > 1) {
		$minutes = "s";
	}

	if ($upmins > 1) {
		$seconds = "s";
	}

	$uptimestr .= sprintf("%02d Hour$hours %02d Minute$minutes %02d Second$seconds", $uphours, $upmins, $upsecs);
	return $uptimestr;
}

/* Calculates non-idle CPU time and returns as a percentage */
function cpu_usage() {
	$duration = 1;
	$diff = array('user', 'nice', 'sys', 'intr', 'idle');
	$cpuTicks = array_combine($diff, explode(" ", get_single_sysctl('kern.cp_time')));
	sleep($duration);
	$cpuTicks2 = array_combine($diff, explode(" ", get_single_sysctl('kern.cp_time')));

	$totalStart = array_sum($cpuTicks);
	$totalEnd = array_sum($cpuTicks2);

	// Something wrapped ?!?!
	if ($totalEnd <= $totalStart) {
		return 0;
	}

	// Calculate total cycles used
	$totalUsed = ($totalEnd - $totalStart) - ($cpuTicks2['idle'] - $cpuTicks['idle']);

	// Calculate the percentage used
	$cpuUsage = floor(100 * ($totalUsed / ($totalEnd - $totalStart)));

	return $cpuUsage;
}

function get_pfstate($percent=false) {
	global $config;
	$matches = "";
	if (isset($config['system']['maximumstates']) and $config['system']['maximumstates'] > 0) {
		$maxstates="{$config['system']['maximumstates']}";
	} else {
		$maxstates=pfsense_default_state_size();
	}
	$curentries = `/sbin/pfctl -si |grep current`;
	if (preg_match("/([0-9]+)/", $curentries, $matches)) {
		$curentries = $matches[1];
	}
	if (!is_numeric($curentries)) {
		$curentries = 0;
	}
	if ($percent) {
		if (intval($maxstates) > 0) {
			return round(($curentries / $maxstates) * 100, 0);
		} else {
			return "NA";
		}
	} else {
		return $curentries . "/" . $maxstates;
	}
}

function has_temp() {
	/* no known temp monitors available at present */

	/* should only reach here if there is no hardware monitor */
	return false;
}

function get_hwtype() {
	return;
}

function get_mbuf($percent=false) {
	$mbufs_output=trim(`/usr/bin/netstat -mb | /usr/bin/grep "mbuf clusters in use" | /usr/bin/awk '{ print $1 }'`);
	list($mbufs_current, $mbufs_cache, $mbufs_total, $mbufs_max) = explode("/", $mbufs_output);
	if ($percent) {
		if ($mbufs_max > 0) {
			return round(($mbufs_total / $mbufs_max) * 100, 0);
		} else {
			return "NA";
		}
	} else {
		return "{$mbufs_total}/{$mbufs_max}";
	}
}

function get_temp() {
	$temp_out = get_single_sysctl("dev.cpu.0.temperature");
	if ($temp_out == "") {
		$temp_out = get_single_sysctl("hw.acpi.thermal.tz0.temperature");
	}

	// Remove 'C' from the end and spaces
	$temp_out = trim(rtrim($temp_out, 'C'));

	if ($temp_out[0] == '-') {
		return '';
	}

	return $temp_out;
}

/* Get mounted filesystems and usage. Do not display entries for virtual filesystems (e.g. devfs, nullfs, unionfs) */
function get_mounted_filesystems() {
	$mout = "";
	$filesystems = array();
	exec("/bin/df -Tht ufs,zfs,cd9660 | /usr/bin/awk '{print $1, $2, $3, $6, $7;}'", $mout);

	/* Get rid of the header */
	array_shift($mout);
	foreach ($mout as $fs) {
		$f = array();
		list($f['device'], $f['type'], $f['total_size'], $f['percent_used'], $f['mountpoint']) = explode(' ', $fs);

		/* We dont' want the trailing % sign. */
		$f['percent_used'] = trim($f['percent_used'], '%');

		$filesystems[] = $f;
	}
	return $filesystems;
}

function disk_usage($slice = '/') {
	$dfout = "";
	exec("/bin/df -h {$slice} | /usr/bin/tail -n 1 | /usr/bin/awk '{ print $5 }' | /usr/bin/cut -d '%' -f 1", $dfout);
	$diskusage = trim($dfout[0]);

	return $diskusage;
}

function swap_usage() {
	exec("/usr/sbin/swapinfo", $swap_info);
	$swap_used = "";
	foreach ($swap_info as $line) {
		if (preg_match('/(\d+)%$/', $line, $matches)) {
			$swap_used = $matches[1];
			break;
		}
	}

	return $swap_used;
}

function mem_usage() {
	$totalMem = get_single_sysctl("vm.stats.vm.v_page_count");
	if ($totalMem > 0) {
		$inactiveMem = get_single_sysctl("vm.stats.vm.v_inactive_count");
		$cachedMem = get_single_sysctl("vm.stats.vm.v_cache_count");
		$freeMem = get_single_sysctl("vm.stats.vm.v_free_count");
		$usedMem = $totalMem - ($inactiveMem + $cachedMem + $freeMem);
		$memUsage = round(($usedMem * 100) / $totalMem, 0);
	} else {
		$memUsage = "NA";
	}

	return $memUsage;
}

function update_date_time() {
	$datetime = date("D M j G:i:s T Y");
	return $datetime;
}

function get_cpufreq() {
	$cpufreqs = "";
	$out = "";
	$cpufreqs = explode(" ", get_single_sysctl('dev.cpu.0.freq_levels'));
	$maxfreq = explode("/", $cpufreqs[0]);
	$maxfreq = $maxfreq[0];
	$curfreq = "";
	$curfreq = get_single_sysctl('dev.cpu.0.freq');
	if (($curfreq > 0) && ($curfreq != $maxfreq)) {
		$out = "Current: {$curfreq} MHz, Max: {$maxfreq} MHz";
	}
	return $out;
}

function get_cpu_count($show_detail = false) {
	$cpucount = get_single_sysctl('kern.smp.cpus');

	if ($show_detail) {
		$cpudetail = "";
		exec("/usr/bin/grep 'SMP.*package.*core' /var/log/dmesg.boot | /usr/bin/cut -f2- -d' '", $cpudetail);
		$cpucount = $cpudetail[0];
	}
	return $cpucount;
}

function get_load_average() {
	$load_average = "";
	exec("/usr/bin/uptime | /usr/bin/sed 's/^.*: //'", $load_average);
	return $load_average[0];
}

function get_interfacestats() {
	global $config;
	//build interface list for widget use
	$ifdescrs = get_configured_interface_list();

	$array_in_packets = array();
	$array_out_packets = array();
	$array_in_bytes = array();
	$array_out_bytes = array();
	$array_in_errors = array();
	$array_out_errors = array();
	$array_collisions = array();
	$array_interrupt = array();
	$new_data = "";

	//build data arrays
	foreach ($ifdescrs as $ifdescr => $ifname) {
		$ifinfo = get_interface_info($ifdescr);
		$new_data .= "{$ifinfo['inpkts']},";
		$new_data .= "{$ifinfo['outpkts']},";
		$new_data .= format_bytes($ifinfo['inbytes']) . ",";
		$new_data .= format_bytes($ifinfo['outbytes']) . ",";
		if (isset($ifinfo['inerrs'])) {
			$new_data .= "{$ifinfo['inerrs']},";
			$new_data .= "{$ifinfo['outerrs']},";
		} else {
			$new_data .= "0,";
			$new_data .= "0,";
		}
		if (isset($ifinfo['collisions'])) {
			$new_data .= htmlspecialchars($ifinfo['collisions']) . ",";
		} else {
			$new_data .= "0,";
		}
	}//end for

	return $new_data;
}

function get_interfacestatus() {
	$data = "";
	global $config;

	//build interface list for widget use
	$ifdescrs = get_configured_interface_with_descr();

	foreach ($ifdescrs as $ifdescr => $ifname) {
		$ifinfo = get_interface_info($ifdescr);
		$data .= $ifname . "^";
		if ($ifinfo['status'] == "up" || $ifinfo['status'] == "associated") {
			$data .= "up";
		} else if ($ifinfo['status'] == "no carrier") {
			$data .= "down";
		} else if ($ifinfo['status'] == "down") {
			$data .= "block";
		}
		$data .= "^";
		if ($ifinfo['ipaddr']) {
			$data .= "<strong>" . htmlspecialchars($ifinfo['ipaddr']) . "</strong>";
		}
		$data .= "^";
		if ($ifinfo['ipaddrv6']) {
			$data .= "<strong>" . htmlspecialchars($ifinfo['ipaddrv6']) . "</strong>";
		}
		$data .= "^";
		if ($ifinfo['status'] != "down") {
			$data .= htmlspecialchars($ifinfo['media']);
		}

		$data .= "~";

	}
	return $data;
}

?>
