pfSense

<?php

/*

	graph.php

	part of m0n0wall (http://m0n0.ch/wall)

	Copyright (C) 2013-2015 Electric Sheep Fencing, LP

	Copyright (C) 2004-2006 T. Lechat <dev@lechat.org>, Manuel Kasper <mk@neon1.net>

	and Jonathan Watt <jwatt@jwatt.org>.

	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.

*/

/*

	pfSense_MODULE:	graph

*/

##|+PRIV

##|*IDENT=page-diagnostics-interfacetraffic

##|*NAME=Diagnostics: Interface Traffic page

##|*DESCR=Allow access to the 'Diagnostics: Interface Traffic' page.

##|*MATCH=graph.php*

##|-PRIV

require("globals.inc");

require("guiconfig.inc");

header("Last-Modified: " . gmdate( "D, j M Y H:i:s" ) . " GMT" );

header("Expires: " . gmdate( "D, j M Y H:i:s", time() ) . " GMT" );

header("Cache-Control: no-store, no-cache, must-revalidate" ); // HTTP/1.1

header("Cache-Control: post-check=0, pre-check=0", FALSE );

header("Pragma: no-cache"); // HTTP/1.0

header("Content-type: image/svg+xml");

/********** HTTP GET Based Conf ***********/

$ifnum=@$_GET["ifnum"];  // BSD / SNMP interface name / number

$ifnum = get_real_interface($ifnum);

$ifname=@$_GET["ifname"]?$_GET["ifname"]:"Interface $ifnum";  //Interface name that will be showed on top right of graph

/********* Other conf *******/

if (isset($config["widgets"]["trafficgraphs"]["scale_type"]))

	$scale_type = $config["widgets"]["trafficgraphs"]["scale_type"];

else

	$scale_type = "up";

$nb_plot=120;                   //NB plot in graph

if ($_GET["timeint"])

	$time_interval = $_GET["timeint"];		//Refresh time Interval

else

	$time_interval = 3;

if ($_GET["initdelay"])

	$init_delay = $_GET["initdelay"];		//Initial Delay

else

	$init_delay = 3;

//SVG attributes

$attribs['axis']='fill="black" stroke="black"';

$attribs['in']='fill="#FF0000" font-family="Tahoma, Verdana, Arial, Helvetica, sans-serif" font-size="7"';

$attribs['out']='fill="#000000" font-family="Tahoma, Verdana, Arial, Helvetica, sans-serif" font-size="7"';

$attribs['graph_in']='fill="none" stroke="#FF0000" stroke-opacity="0.8"';

$attribs['graph_out']='fill="none" stroke="#000000" stroke-opacity="0.8"';

$attribs['legend']='fill="black" font-family="Tahoma, Verdana, Arial, Helvetica, sans-serif" font-size="4"';

$attribs['graphname']='fill="#FF0000" font-family="Tahoma, Verdana, Arial, Helvetica, sans-serif" font-size="8"';

$attribs['grid_txt']='fill="gray" font-family="Tahoma, Verdana, Arial, Helvetica, sans-serif" font-size="6"';

$attribs['grid']='stroke="gray" stroke-opacity="0.5"';

$attribs['switch_unit']='fill="#FF0000" font-family="Tahoma, Verdana, Arial, Helvetica, sans-serif" font-size="4" text-decoration="underline"';

$attribs['switch_scale']='fill="#FF0000" font-family="Tahoma, Verdana, Arial, Helvetica, sans-serif" font-size="4" text-decoration="underline"';

$attribs['error']='fill="blue" font-family="Arial" font-size="4"';

$attribs['collect_initial']='fill="gray" font-family="Tahoma, Verdana, Arial, Helvetica, sans-serif" font-size="4"';

//Error text if we cannot fetch data : depends on which method is used

$error_text = "Cannot get data about interface " . htmlspecialchars($ifnum);

$height=100;            //SVG internal height : do not modify

$width=200;             //SVG internal width : do not modify

$fetch_link = "ifstats.php?if=" . htmlspecialchars($ifnum);

/* check for custom theme colors */

if(file_exists("/usr/local/www/themes/{$g['theme']}/graph.php")) {

	$themetxt = file_get_contents("/usr/local/www/themes/{$g['theme']}/graph.php");

	eval($themetxt);

} 

/********* Graph DATA **************/

print('<?xml version="1.0" ?>' . "\n");?>

<svg width="100%" height="100%" viewBox="0 0 <?=$width?> <?=$height?>" preserveAspectRatio="none" xml:space="preserve" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" onload="init(evt)">

  <g id="graph">

    <rect id="bg" x1="0" y1="0" width="100%" height="100%" fill="white"/>

    <line id="axis_x" x1="0" y1="0" x2="0" y2="100%" <?=$attribs['axis']?>/>

    <line id="axis_y" x1="0" y1="100%" x2="100%" y2="100%" <?=$attribs['axis']?>/>

    <path id="graph_out" d="M0 <?=$height?> L 0 <?=$height?>" <?=$attribs['graph_out']?>/>

    <path id="graph_in"  d="M0 <?=$height?> L 0 <?=$height?>" <?=$attribs['graph_in']?>/>

    <path id="grid"  d="M0 <?=$height/4*1?> L <?=$width?> <?=$height/4*1?> M0 <?=$height/4*2?> L <?=$width?> <?=$height/4*2?> M0 <?=$height/4*3?> L <?=$width?> <?=$height/4*3?>" <?=$attribs['grid']?>/>

    <text id="grid_txt1" x="<?=$width?>" y="<?=$height/4*1?>" <?=$attribs['grid_txt']?> text-anchor="end"> </text>

    <text id="grid_txt2" x="<?=$width?>" y="<?=$height/4*2?>" <?=$attribs['grid_txt']?> text-anchor="end"> </text>

    <text id="grid_txt3" x="<?=$width?>" y="<?=$height/4*3?>" <?=$attribs['grid_txt']?> text-anchor="end"> </text>

    <text id="graph_in_lbl" x="5" y="8" <?=$attribs['in']?>><?=gettext("In"); ?></text>

    <text id="graph_out_lbl" x="5" y="16" <?=$attribs['out']?>><?=gettext("Out"); ?></text>

    <text id="graph_in_txt" x="20" y="8" <?=$attribs['in']?>> </text>

    <text id="graph_out_txt" x="20" y="16" <?=$attribs['out']?>> </text>

    <text id="ifname" x="<?=$width?>" y="8" <?=$attribs['graphname']?> text-anchor="end"><?=htmlspecialchars($ifname)?></text>

    <text id="switch_unit" x="<?=$width*0.55?>" y="5" <?=$attribs['switch_unit']?>><?=gettext("Switch to bytes/s"); ?></text>

    <text id="switch_scale" x="<?=$width*0.55?>" y="11" <?=$attribs['switch_scale']?>><?=gettext("AutoScale"); ?> (<?=$scale_type?>)</text>

    <text id="date" x="<?=$width*0.33?>" y="5" <?=$attribs['legend']?>> </text>

    <text id="time" x="<?=$width*0.33?>" y="11" <?=$attribs['legend']?>> </text>

    <text id="graphlast" x="<?=$width*0.55?>" y="17" <?=$attribs['legend']?>><?=gettext("Graph shows last"); ?> <?=$time_interval*$nb_plot?> <?=gettext("seconds"); ?></text>

    <polygon id="axis_arrow_x" <?=$attribs['axis']?> points="<?=($width) . "," . ($height)?> <?=($width-2) . "," . ($height-2)?> <?=($width-2) . "," . $height?>"/>

    <text id="error" x="<?=$width*0.5?>" y="<?=$height*0.5?>"  visibility="hidden" <?=$attribs['error']?> text-anchor="middle"><?=$error_text?></text>

    <text id="collect_initial" x="<?=$width*0.5?>" y="<?=$height*0.5?>"  visibility="hidden" <?=$attribs['collect_initial']?> text-anchor="middle"><?=gettext("Collecting initial data, please wait"); ?>...</text>

  </g>

  <script type="text/ecmascript">

    <![CDATA[

/**

 * getURL is a proprietary Adobe function, but it's simplicity has made it very

 * popular. If getURL is undefined we spin our own by wrapping XMLHttpRequest.

 */

if (typeof getURL == 'undefined') {

  getURL = function(url, callback) {

    if (!url)

      throw '<?=gettext("No URL for getURL"); ?>';

    try {

      if (typeof callback.operationComplete == 'function')

        callback = callback.operationComplete;

    } catch (e) {}

    if (typeof callback != 'function')

      throw '<?=gettext("No callback function for getURL"); ?>';

    var http_request = null;

    if (typeof XMLHttpRequest != 'undefined') {

      http_request = new XMLHttpRequest();

    }

    else if (typeof ActiveXObject != 'undefined') {

      try {

        http_request = new ActiveXObject('Msxml2.XMLHTTP');

      } catch (e) {

        try {

          http_request = new ActiveXObject('Microsoft.XMLHTTP');

        } catch (e) {}

      }

    }

    if (!http_request)

      throw '<?=gettext("Both getURL and XMLHttpRequest are undefined"); ?>';

    http_request.onreadystatechange = function() {

      if (http_request.readyState == 4) {

        callback( { success : true,

                    content : http_request.responseText,

                    contentType : http_request.getResponseHeader("Content-Type") } );

      }

    }

    http_request.open('GET', url, true);

    http_request.send(null);

  }

}

var SVGDoc = null;

var last_ifin = 0;

var last_ifout = 0;

var last_ugmt = 0;

var max = 0;

var plot_in = new Array();

var plot_out = new Array();

var max_num_points = <?=$nb_plot?>;  // maximum number of plot data points

var step = <?=$width?> / max_num_points ;

var unit = 'bits';

var scale_type = '<?=$scale_type?>';

function init(evt) {

  SVGDoc = evt.target.ownerDocument;

  SVGDoc.getElementById("switch_unit").addEventListener("mousedown", switch_unit, false);

  SVGDoc.getElementById("switch_scale").addEventListener("mousedown", switch_scale, false);

  fetch_data();

}

function switch_unit(event)

{

  SVGDoc.getElementById('switch_unit').firstChild.data = '<?=gettext("Switch to"); ?> ' + unit + '/s';

  unit = (unit == 'bits') ? 'bytes' : 'bits';

}

function switch_scale(event)

{

  scale_type = (scale_type == 'up') ? '<?=gettext("follow"); ?>' : '<?=gettext("up"); ?>';

  SVGDoc.getElementById('switch_scale').firstChild.data = 'AutoScale (' + scale_type + ')';

}

function fetch_data() {

  getURL('<?=$fetch_link?>', plot_data);

}

function plot_data(obj) {

  // Show datetimelegend

  var now = new Date();

  var time = LZ(now.getHours()) + ":" + LZ(now.getMinutes()) + ":" + LZ(now.getSeconds());

  SVGDoc.getElementById('time').firstChild.data = time;

  var date = (now.getMonth()+1) + "/" + now.getDate() + "/" + now.getFullYear();

  SVGDoc.getElementById('date').firstChild.data = date;

  if (!obj.success)

    return handle_error();  // getURL failed to get data

  var t = obj.content.split("|");

  var ugmt = parseFloat(t[0]);  // ugmt is an unixtimestamp style

  var ifin = parseInt(t[1], 10);    // number of bytes received by the interface

  var ifout = parseInt(t[2], 10);   // number of bytes sent by the interface

  var scale;

  if (!isNumber(ifin) || !isNumber(ifout))

    return handle_error();

  var diff_ugmt  = ugmt - last_ugmt;

  var diff_ifin  = ifin - last_ifin;

  var diff_ifout = ifout - last_ifout;

  if (diff_ugmt == 0)

    diff_ugmt = 1;  /* avoid division by zero */

  last_ugmt = ugmt;

  last_ifin = ifin;

  last_ifout = ifout;

  var graphTimerId = 0;

  switch (plot_in.length) {

  	case 0:

  		SVGDoc.getElementById("collect_initial").setAttributeNS(null, 'visibility', 'visible');

		plot_in[0] = diff_ifin / diff_ugmt;

		plot_out[0] = diff_ifout / diff_ugmt;

		setTimeout('fetch_data()',<?=1000*($time_interval + $init_delay)?>);

		return;

	case 1:

    	SVGDoc.getElementById("collect_initial").setAttributeNS(null, 'visibility', 'hidden');

    	break;

    case max_num_points:

		// shift plot to left if the maximum number of plot points has been reached

		var i = 0;

		while (i < max_num_points) {

		  plot_in[i] = plot_in[i+1];

		  plot_out[i] = plot_out[++i];

		}

		plot_in.length--;

		plot_out.length--;

  }

  plot_in[plot_in.length] = diff_ifin / diff_ugmt;

  plot_out[plot_out.length]= diff_ifout / diff_ugmt;

  var index_plot = plot_in.length - 1;

  SVGDoc.getElementById('graph_in_txt').firstChild.data = formatSpeed(plot_in[index_plot], unit);

  SVGDoc.getElementById('graph_out_txt').firstChild.data = formatSpeed(plot_out[index_plot], unit);

  /* determine peak for sensible scaling */

  if (scale_type == 'up') {

    if (plot_in[index_plot] > max)

      max = plot_in[index_plot];

    if (plot_out[index_plot] > max)

      max = plot_out[index_plot];

  }

  else if (scale_type == 'follow') {

    i = 0;

    max = 0;

    while (i < plot_in.length) {

      if (plot_in[i] > max)

        max = plot_in[i];

      if (plot_out[i] > max)

        max = plot_out[i];

      i++;

    }

  }

  var rmax;  // max, rounded up

  if (unit == 'bits') {

    /* round up max, such that

         100 kbps -> 200 kbps -> 400 kbps -> 800 kbps -> 1 Mbps -> 2 Mbps -> ... */

    rmax = 12500;

    i = 0;

    while (max > rmax) {

      i++;

      if (i && (i % 4 == 0))

        rmax *= 1.25;

      else

        rmax *= 2;

    }

  } else {

    /* round up max, such that

         10 KB/s -> 20 KB/s -> 40 KB/s -> 80 KB/s -> 100 KB/s -> 200 KB/s -> 400 KB/s -> 800 KB/s -> 1 MB/s ... */

    rmax = 10240;

    i = 0;

    while (max > rmax) {

      i++;

      if (i && (i % 4 == 0))

        rmax *= 1.25;

      else

        rmax *= 2;

      if (i == 8)

        rmax *= 1.024;

    }

  }

  scale = <?=$height?> / rmax;

  /* change labels accordingly */

  SVGDoc.getElementById('grid_txt1').firstChild.data = formatSpeed(3*rmax/4,unit);

  SVGDoc.getElementById('grid_txt2').firstChild.data = formatSpeed(2*rmax/4,unit);

  SVGDoc.getElementById('grid_txt3').firstChild.data = formatSpeed(rmax/4,unit);

  var path_in = "M 0 " + (<?=$height?> - (plot_in[0] * scale));

  var path_out = "M 0 " + (<?=$height?> - (plot_out[0] * scale));

  for (i = 1; i < plot_in.length; i++)

  {

    var x = step * i;

    var y_in = <?=$height?> - (plot_in[i] * scale);

    var y_out = <?=$height?> - (plot_out[i] * scale);

    path_in += " L" + x + " " + y_in;

    path_out += " L" + x + " " + y_out;

  }

  SVGDoc.getElementById('error').setAttributeNS(null, 'visibility', 'hidden');

  SVGDoc.getElementById('graph_in').setAttributeNS(null, 'd', path_in);

  SVGDoc.getElementById('graph_out').setAttributeNS(null, 'd', path_out);

  setTimeout('fetch_data()',<?=1000*$time_interval?>);

}

function handle_error() {

  SVGDoc.getElementById("error").setAttributeNS(null, 'visibility', 'visible');

  setTimeout('fetch_data()',<?=1000*$time_interval?>);

}

function isNumber(a) {

  return typeof a == 'number' && isFinite(a);

}

function formatSpeed(speed, unit) {

  if (unit == 'bits')

    return formatSpeedBits(speed);

  if (unit == 'bytes')

    return formatSpeedBytes(speed);

}

function formatSpeedBits(speed) {

  // format speed in bits/sec, input: bytes/sec

  if (speed < 125000)

    return Math.round(speed / 125) + " <?=gettext("Kbps"); ?>";

  if (speed < 125000000)

    return Math.round(speed / 1250)/100 + " <?=gettext("Mbps"); ?>";

  // else

  return Math.round(speed / 1250000)/100 + " <?=gettext("Gbps"); ?>";  /* wow! */

}

function formatSpeedBytes(speed) {

  // format speed in bytes/sec, input:  bytes/sec

  if (speed < 1048576)

    return Math.round(speed / 10.24)/100 + " <?=gettext("KB/s"); ?>";

  if (speed < 1073741824)

    return Math.round(speed / 10485.76)/100 + " <?=gettext("MB/s"); ?>";

  // else

  return Math.round(speed / 10737418.24)/100 + " <?=gettext("GB/s"); ?>";  /* wow! */

}

function LZ(x) {

  return (x < 0 || x > 9 ? "" : "0") + x;

}

    ]]>

  </script>

</svg>