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<?php
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/*
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	graph.php
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	part of m0n0wall (http://m0n0.ch/wall)
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	Copyright (C) 2013-2015 Electric Sheep Fencing, LP
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	Copyright (C) 2004-2006 T. Lechat <dev@lechat.org>, Manuel Kasper <mk@neon1.net>
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	and Jonathan Watt <jwatt@jwatt.org>.
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	All rights reserved.
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	Redistribution and use in source and binary forms, with or without
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	modification, are permitted provided that the following conditions are met:
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	1. Redistributions of source code must retain the above copyright notice,
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	   this list of conditions and the following disclaimer.
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	2. Redistributions in binary form must reproduce the above copyright
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	   notice, this list of conditions and the following disclaimer in the
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	   documentation and/or other materials provided with the distribution.
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	THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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	INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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	AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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	AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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	OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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	SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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	INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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	CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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	ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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	POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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	pfSense_MODULE:	graph
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*/
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##|+PRIV
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##|*IDENT=page-diagnostics-interfacetraffic
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##|*NAME=Diagnostics: Interface Traffic page
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##|*DESCR=Allow access to the 'Diagnostics: Interface Traffic' page.
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##|*MATCH=graph.php*
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##|-PRIV
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require("globals.inc");
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require("guiconfig.inc");
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header("Last-Modified: " . gmdate( "D, j M Y H:i:s" ) . " GMT" );
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header("Expires: " . gmdate( "D, j M Y H:i:s", time() ) . " GMT" );
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header("Cache-Control: no-store, no-cache, must-revalidate" ); // HTTP/1.1
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header("Cache-Control: post-check=0, pre-check=0", FALSE );
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header("Pragma: no-cache"); // HTTP/1.0
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header("Content-type: image/svg+xml");
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53
/********** HTTP GET Based Conf ***********/
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$ifnum=@$_GET["ifnum"];  // BSD / SNMP interface name / number
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$ifnum = get_real_interface($ifnum);
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$ifname=@$_GET["ifname"]?$_GET["ifname"]:"Interface $ifnum";  //Interface name that will be showed on top right of graph
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58
/********* Other conf *******/
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if (isset($config["widgets"]["trafficgraphs"]["scale_type"]))
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	$scale_type = $config["widgets"]["trafficgraphs"]["scale_type"];
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else
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	$scale_type = "up";
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$nb_plot=120;                   //NB plot in graph
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if ($_GET["timeint"])
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	$time_interval = $_GET["timeint"];		//Refresh time Interval
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else
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	$time_interval = 3;
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if ($_GET["initdelay"])
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	$init_delay = $_GET["initdelay"];		//Initial Delay
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else
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	$init_delay = 3;
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//SVG attributes
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$attribs['axis']='fill="black" stroke="black"';
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$attribs['in']='fill="#FF0000" font-family="Tahoma, Verdana, Arial, Helvetica, sans-serif" font-size="7"';
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$attribs['out']='fill="#000000" font-family="Tahoma, Verdana, Arial, Helvetica, sans-serif" font-size="7"';
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$attribs['graph_in']='fill="none" stroke="#FF0000" stroke-opacity="0.8"';
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$attribs['graph_out']='fill="none" stroke="#000000" stroke-opacity="0.8"';
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$attribs['legend']='fill="black" font-family="Tahoma, Verdana, Arial, Helvetica, sans-serif" font-size="4"';
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$attribs['graphname']='fill="#FF0000" font-family="Tahoma, Verdana, Arial, Helvetica, sans-serif" font-size="8"';
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$attribs['grid_txt']='fill="gray" font-family="Tahoma, Verdana, Arial, Helvetica, sans-serif" font-size="6"';
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$attribs['grid']='stroke="gray" stroke-opacity="0.5"';
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$attribs['switch_unit']='fill="#FF0000" font-family="Tahoma, Verdana, Arial, Helvetica, sans-serif" font-size="4" text-decoration="underline"';
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$attribs['switch_scale']='fill="#FF0000" font-family="Tahoma, Verdana, Arial, Helvetica, sans-serif" font-size="4" text-decoration="underline"';
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$attribs['error']='fill="blue" font-family="Arial" font-size="4"';
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$attribs['collect_initial']='fill="gray" font-family="Tahoma, Verdana, Arial, Helvetica, sans-serif" font-size="4"';
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//Error text if we cannot fetch data : depends on which method is used
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$error_text = "Cannot get data about interface " . htmlspecialchars($ifnum);
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$height=100;            //SVG internal height : do not modify
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$width=200;             //SVG internal width : do not modify
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$fetch_link = "ifstats.php?if=" . htmlspecialchars($ifnum);
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/* check for custom theme colors */
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if(file_exists("/usr/local/www/themes/{$g['theme']}/graph.php")) {
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	$themetxt = file_get_contents("/usr/local/www/themes/{$g['theme']}/graph.php");
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	eval($themetxt);
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} 
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/********* Graph DATA **************/
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print('<?xml version="1.0" ?>' . "\n");?>
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<svg width="100%" height="100%" viewBox="0 0 <?=$width?> <?=$height?>" preserveAspectRatio="none" xml:space="preserve" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" onload="init(evt)">
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  <g id="graph">
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    <rect id="bg" x1="0" y1="0" width="100%" height="100%" fill="white"/>
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    <line id="axis_x" x1="0" y1="0" x2="0" y2="100%" <?=$attribs['axis']?>/>
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    <line id="axis_y" x1="0" y1="100%" x2="100%" y2="100%" <?=$attribs['axis']?>/>
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    <path id="graph_out" d="M0 <?=$height?> L 0 <?=$height?>" <?=$attribs['graph_out']?>/>
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    <path id="graph_in"  d="M0 <?=$height?> L 0 <?=$height?>" <?=$attribs['graph_in']?>/>
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    <path id="grid"  d="M0 <?=$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?>" <?=$attribs['grid']?>/>
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    <text id="grid_txt1" x="<?=$width?>" y="<?=$height/4*1?>" <?=$attribs['grid_txt']?> text-anchor="end"> </text>
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    <text id="grid_txt2" x="<?=$width?>" y="<?=$height/4*2?>" <?=$attribs['grid_txt']?> text-anchor="end"> </text>
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    <text id="grid_txt3" x="<?=$width?>" y="<?=$height/4*3?>" <?=$attribs['grid_txt']?> text-anchor="end"> </text>
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    <text id="graph_in_lbl" x="5" y="8" <?=$attribs['in']?>><?=gettext("In"); ?></text>
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    <text id="graph_out_lbl" x="5" y="16" <?=$attribs['out']?>><?=gettext("Out"); ?></text>
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    <text id="graph_in_txt" x="20" y="8" <?=$attribs['in']?>> </text>
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    <text id="graph_out_txt" x="20" y="16" <?=$attribs['out']?>> </text>
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    <text id="ifname" x="<?=$width?>" y="8" <?=$attribs['graphname']?> text-anchor="end"><?=htmlspecialchars($ifname)?></text>
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    <text id="switch_unit" x="<?=$width*0.55?>" y="5" <?=$attribs['switch_unit']?>><?=gettext("Switch to bytes/s"); ?></text>
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    <text id="switch_scale" x="<?=$width*0.55?>" y="11" <?=$attribs['switch_scale']?>><?=gettext("AutoScale"); ?> (<?=$scale_type?>)</text>
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    <text id="date" x="<?=$width*0.33?>" y="5" <?=$attribs['legend']?>> </text>
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    <text id="time" x="<?=$width*0.33?>" y="11" <?=$attribs['legend']?>> </text>
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    <text id="graphlast" x="<?=$width*0.55?>" y="17" <?=$attribs['legend']?>><?=gettext("Graph shows last"); ?> <?=$time_interval*$nb_plot?> <?=gettext("seconds"); ?></text>
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    <polygon id="axis_arrow_x" <?=$attribs['axis']?> points="<?=($width) . "," . ($height)?> <?=($width-2) . "," . ($height-2)?> <?=($width-2) . "," . $height?>"/>
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    <text id="error" x="<?=$width*0.5?>" y="<?=$height*0.5?>"  visibility="hidden" <?=$attribs['error']?> text-anchor="middle"><?=$error_text?></text>
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    <text id="collect_initial" x="<?=$width*0.5?>" y="<?=$height*0.5?>"  visibility="hidden" <?=$attribs['collect_initial']?> text-anchor="middle"><?=gettext("Collecting initial data, please wait"); ?>...</text>
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  </g>
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  <script type="text/ecmascript">
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    <![CDATA[
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/**
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 * getURL is a proprietary Adobe function, but it's simplicity has made it very
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 * popular. If getURL is undefined we spin our own by wrapping XMLHttpRequest.
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 */
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if (typeof getURL == 'undefined') {
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  getURL = function(url, callback) {
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    if (!url)
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      throw '<?=gettext("No URL for getURL"); ?>';
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    try {
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      if (typeof callback.operationComplete == 'function')
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        callback = callback.operationComplete;
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    } catch (e) {}
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    if (typeof callback != 'function')
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      throw '<?=gettext("No callback function for getURL"); ?>';
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    var http_request = null;
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    if (typeof XMLHttpRequest != 'undefined') {
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      http_request = new XMLHttpRequest();
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    }
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    else if (typeof ActiveXObject != 'undefined') {
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      try {
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        http_request = new ActiveXObject('Msxml2.XMLHTTP');
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      } catch (e) {
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        try {
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          http_request = new ActiveXObject('Microsoft.XMLHTTP');
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        } catch (e) {}
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      }
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    }
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    if (!http_request)
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      throw '<?=gettext("Both getURL and XMLHttpRequest are undefined"); ?>';
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    http_request.onreadystatechange = function() {
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      if (http_request.readyState == 4) {
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        callback( { success : true,
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                    content : http_request.responseText,
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                    contentType : http_request.getResponseHeader("Content-Type") } );
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      }
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    }
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    http_request.open('GET', url, true);
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    http_request.send(null);
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  }
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}
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var SVGDoc = null;
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var last_ifin = 0;
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var last_ifout = 0;
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var last_ugmt = 0;
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var max = 0;
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var plot_in = new Array();
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var plot_out = new Array();
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var max_num_points = <?=$nb_plot?>;  // maximum number of plot data points
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var step = <?=$width?> / max_num_points ;
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var unit = 'bits';
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var scale_type = '<?=$scale_type?>';
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function init(evt) {
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  SVGDoc = evt.target.ownerDocument;
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  SVGDoc.getElementById("switch_unit").addEventListener("mousedown", switch_unit, false);
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  SVGDoc.getElementById("switch_scale").addEventListener("mousedown", switch_scale, false);
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  fetch_data();
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}
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function switch_unit(event)
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{
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  SVGDoc.getElementById('switch_unit').firstChild.data = '<?=gettext("Switch to"); ?> ' + unit + '/s';
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  unit = (unit == 'bits') ? 'bytes' : 'bits';
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}
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function switch_scale(event)
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{
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  scale_type = (scale_type == 'up') ? '<?=gettext("follow"); ?>' : '<?=gettext("up"); ?>';
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  SVGDoc.getElementById('switch_scale').firstChild.data = 'AutoScale (' + scale_type + ')';
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}
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function fetch_data() {
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  getURL('<?=$fetch_link?>', plot_data);
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}
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function plot_data(obj) {
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  // Show datetimelegend
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  var now = new Date();
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  var time = LZ(now.getHours()) + ":" + LZ(now.getMinutes()) + ":" + LZ(now.getSeconds());
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  SVGDoc.getElementById('time').firstChild.data = time;
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  var date = (now.getMonth()+1) + "/" + now.getDate() + "/" + now.getFullYear();
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  SVGDoc.getElementById('date').firstChild.data = date;
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  if (!obj.success)
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    return handle_error();  // getURL failed to get data
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  var t = obj.content.split("|");
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  var ugmt = parseFloat(t[0]);  // ugmt is an unixtimestamp style
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  var ifin = parseInt(t[1], 10);    // number of bytes received by the interface
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  var ifout = parseInt(t[2], 10);   // number of bytes sent by the interface
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  var scale;
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  if (!isNumber(ifin) || !isNumber(ifout))
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    return handle_error();
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  var diff_ugmt  = ugmt - last_ugmt;
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  var diff_ifin  = ifin - last_ifin;
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  var diff_ifout = ifout - last_ifout;
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  if (diff_ugmt == 0)
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    diff_ugmt = 1;  /* avoid division by zero */
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  last_ugmt = ugmt;
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  last_ifin = ifin;
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  last_ifout = ifout;
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  var graphTimerId = 0;
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  switch (plot_in.length) {
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  	case 0:
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  		SVGDoc.getElementById("collect_initial").setAttributeNS(null, 'visibility', 'visible');
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		plot_in[0] = diff_ifin / diff_ugmt;
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		plot_out[0] = diff_ifout / diff_ugmt;
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		setTimeout('fetch_data()',<?=1000*($time_interval + $init_delay)?>);
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		return;
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	case 1:
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    	SVGDoc.getElementById("collect_initial").setAttributeNS(null, 'visibility', 'hidden');
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    	break;
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    case max_num_points:
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		// shift plot to left if the maximum number of plot points has been reached
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		var i = 0;
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		while (i < max_num_points) {
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		  plot_in[i] = plot_in[i+1];
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		  plot_out[i] = plot_out[++i];
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		}
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		plot_in.length--;
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		plot_out.length--;
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  }
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  plot_in[plot_in.length] = diff_ifin / diff_ugmt;
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  plot_out[plot_out.length]= diff_ifout / diff_ugmt;
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  var index_plot = plot_in.length - 1;
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  SVGDoc.getElementById('graph_in_txt').firstChild.data = formatSpeed(plot_in[index_plot], unit);
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  SVGDoc.getElementById('graph_out_txt').firstChild.data = formatSpeed(plot_out[index_plot], unit);
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  /* determine peak for sensible scaling */
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  if (scale_type == 'up') {
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    if (plot_in[index_plot] > max)
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      max = plot_in[index_plot];
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    if (plot_out[index_plot] > max)
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      max = plot_out[index_plot];
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  }
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  else if (scale_type == 'follow') {
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    i = 0;
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    max = 0;
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    while (i < plot_in.length) {
285
      if (plot_in[i] > max)
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        max = plot_in[i];
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      if (plot_out[i] > max)
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        max = plot_out[i];
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      i++;
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    }
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  }
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293
  var rmax;  // max, rounded up
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  if (unit == 'bits') {
296
    /* round up max, such that
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         100 kbps -> 200 kbps -> 400 kbps -> 800 kbps -> 1 Mbps -> 2 Mbps -> ... */
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    rmax = 12500;
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    i = 0;
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    while (max > rmax) {
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      i++;
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      if (i && (i % 4 == 0))
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        rmax *= 1.25;
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      else
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        rmax *= 2;
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    }
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  } else {
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    /* round up max, such that
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         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 ... */
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    rmax = 10240;
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    i = 0;
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    while (max > rmax) {
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      i++;
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      if (i && (i % 4 == 0))
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        rmax *= 1.25;
316
      else
317
        rmax *= 2;
318
      
319
      if (i == 8)
320
        rmax *= 1.024;
321
    }
322
  }
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  scale = <?=$height?> / rmax;
325
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  /* change labels accordingly */
327
  SVGDoc.getElementById('grid_txt1').firstChild.data = formatSpeed(3*rmax/4,unit);
328
  SVGDoc.getElementById('grid_txt2').firstChild.data = formatSpeed(2*rmax/4,unit);
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  SVGDoc.getElementById('grid_txt3').firstChild.data = formatSpeed(rmax/4,unit);
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331
  var path_in = "M 0 " + (<?=$height?> - (plot_in[0] * scale));
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  var path_out = "M 0 " + (<?=$height?> - (plot_out[0] * scale));
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  for (i = 1; i < plot_in.length; i++)
334
  {
335
    var x = step * i;
336
    var y_in = <?=$height?> - (plot_in[i] * scale);
337
    var y_out = <?=$height?> - (plot_out[i] * scale);
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    path_in += " L" + x + " " + y_in;
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    path_out += " L" + x + " " + y_out;
340
  }
341
342
  SVGDoc.getElementById('error').setAttributeNS(null, 'visibility', 'hidden');
343
  SVGDoc.getElementById('graph_in').setAttributeNS(null, 'd', path_in);
344
  SVGDoc.getElementById('graph_out').setAttributeNS(null, 'd', path_out);
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  setTimeout('fetch_data()',<?=1000*$time_interval?>);
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}
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function handle_error() {
350
  SVGDoc.getElementById("error").setAttributeNS(null, 'visibility', 'visible');
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  setTimeout('fetch_data()',<?=1000*$time_interval?>);
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}
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function isNumber(a) {
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  return typeof a == 'number' && isFinite(a);
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}
357
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function formatSpeed(speed, unit) {
359
  if (unit == 'bits')
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    return formatSpeedBits(speed);
361
  if (unit == 'bytes')
362
    return formatSpeedBytes(speed);
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}
364
365
function formatSpeedBits(speed) {
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  // format speed in bits/sec, input: bytes/sec
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  if (speed < 125000)
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    return Math.round(speed / 125) + " <?=gettext("Kbps"); ?>";
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  if (speed < 125000000)
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    return Math.round(speed / 1250)/100 + " <?=gettext("Mbps"); ?>";
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  // else
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  return Math.round(speed / 1250000)/100 + " <?=gettext("Gbps"); ?>";  /* wow! */
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}
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function formatSpeedBytes(speed) {
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  // format speed in bytes/sec, input:  bytes/sec
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  if (speed < 1048576)
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    return Math.round(speed / 10.24)/100 + " <?=gettext("KB/s"); ?>";
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  if (speed < 1073741824)
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    return Math.round(speed / 10485.76)/100 + " <?=gettext("MB/s"); ?>";
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  // else
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  return Math.round(speed / 10737418.24)/100 + " <?=gettext("GB/s"); ?>";  /* wow! */
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}
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function LZ(x) {
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  return (x < 0 || x > 9 ? "" : "0") + x;
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}
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389
    ]]>
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  </script>
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</svg>