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index.html
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index.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>PittMesh IP Address calculator</title>
<style>
#transcript {
border: 2px groove threedface;
font-family: monospace;
padding: 0.35em 0.75em 0.75em 0.625em;
margin: 8px 2px;
}
@media all and (min-width: 400px) {
.output {
display: inline-block;
white-space: nowrap;
}
.output label {
display: inline-block;
width: 4.5em;
}
}
@media all and (max-width: 479px) {
.input input {
width: calc(100% - 9.25em);
}
.input label {
display: block;
text-align: center;
}
.output input {
width: calc(100% - 12.5em);
}
h1 {
text-align: center;
}
}
@media all and (max-width: 399px) {
.output {
white-space: normal;
}
.output input {
width: calc(100% - 7.25em);
}
.output label {
display: block;
text-align: center;
}
}
</style>
</head>
<body>
<h1>PittMesh IP address calculator</h1>
<hr/>
<p>
This tool takes a router's MAC address and calculates the two IP addresses
that the router needs: mesh interface and wlan client interface.
</p>
<form id="calc" onSubmit="return calc();">
<fieldset form="calc">
<legend>Input</legend>
<div class="input">
<label for="mac">MAC address</label>
<input name="mac" id="mac" placeholder="de:ad:be:ef:00:00"/>
<button type="submit">Calculate</button>
</div>
</fieldset>
<fieldset form="calc">
<legend>Output</legend>
<div class="output">
<label for="mesh">Mesh IP</label>
<input name="mesh" id="mesh" disabled="disabled"/>
<button id="copy-mesh" type="button">copy</button>
</div>
<div class="output">
<label for="wlan">WLAN IP</label>
<input name="wlan" id="wlan" disabled="disabled"/>
<button id="copy-wlan" type="button">copy</button>
</div>
</fieldset>
</form>
<div id="transcript">
<p>Log messages will appear here.</p>
<p><a href="https://github.com/pittmesh/ip-calculator">Fork ip-calculator on Github</a>.</p>
</div>
<script>
"use strict";
//
// constants
//
var meshPrefix = [100];
var wlanPrefix = [10];
var wlanSuffix = [1];
var macEl = document.getElementById('mac');
var meshEl = document.getElementById('mesh');
var wlanEl = document.getElementById('wlan');
var transcriptEl = document.getElementById('transcript');
var cssError = "color:red; font-family:helvetica,sans-serif; font-weight:bold; text-shadow:0 1px 2px rgba(0,0,0,.5);";
var cssSuccess = "color:green; font-family:helvetica,sans-serif; font-weight:bold; text-shadow:0 1px 2px rgba(0,0,0,.5);";
var cssWarning = "background-color:gray; color:yellow; display: block; font-family:helvetica,sans-serif; font-weight:bold; text-shadow:0 1px 2px rgba(0,0,0,.5); width: 100%;";
function calc() {
var mac = macEl.value;
var macArray = mac.split(/[:-]/);
if (!mac.match(/^([0-9A-Fa-f]{2}[:-]){5}[0-9A-Fa-f]{2}$/)) {
displayError("The MAC address does not appear to be valid. Ensure that there are six octets, separated by colons (:) or hyphens (-) with valid hexadecimal values 00-FF");
return false;
}
var macArrayDecimals = convertHexToDecimals(macArray);
var meshIP = calcMeshIP(adjustOctets(lastThreeOctets(macArrayDecimals)));
var wlanIP = calcWlanIP(adjustOctets(lastTwoOctets(macArrayDecimals)));
meshEl.value = meshIP;
wlanEl.value = wlanIP;
displaySuccess("MAC Address "+macArray.join(":")+" calculates to Mesh IP "+meshIP+" WLAN IP "+wlanIP);
return false;
}
function calcMeshIP(lastThree) {
return makeIP(meshPrefix.concat(lastThree));
}
function calcWlanIP(lastTwo) {
return makeIP(wlanPrefix.concat(lastTwo).concat(wlanSuffix));
}
function makeIP(arr) { return arr.join("."); }
function pad(s, l, p) { return (Array(l||2).join(p||"0")+s).slice(-l||-2); }
function padcall(c, i, a) { return pad(c); }
function log(text, style) {
var date = new Date();
var timestamp = "["+[date.getHours(), date.getMinutes(), date.getSeconds()].map(padcall).join(":")+"]";
transcriptEl.appendFirst(createLogLineElement(timestamp, text, style));
console.log("[%.2d:%.2d:%.2d] %c"+text, date.getHours(), date.getMinutes(), date.getSeconds(), style);
}
function displayError(text) {
log(text, cssError);
}
function displaySuccess(text) {
log(text, cssSuccess);
}
function displayWarning(text) {
log(text, cssWarning);
}
function createLogLineElement(time, text, style) {
var line = document.createElement("p");
var lineTime = document.createElement("span");
var lineText = document.createElement("span");
lineTime.appendChild(document.createTextNode(time));
lineText.appendChild(document.createTextNode(text));
lineTime.classList.add("time");
lineText.classList.add("text");
lineText.style = style;
line.appendChild(lineTime);
line.appendChild(lineText);
return line;
}
function adjustOctets(arr) {
console.log(arr.length);
if (arr.length == 3) {
arr[0] %= 32 + 96;
arr[2] -= (arr[2] % 64 - arr[2] % 32);
} else if (arr.length == 2) {
arr[1] -= (arr[1] % 64 - arr[1] % 32);
}
return arr;
}
function convertHexToDecimals(arr) { return arr.map( function(h) { return parseInt(h, 16); } ); }
function firstThreeOctets(arr) { return arr.slice(0, 3); }
function lastThreeOctets(arr) { return arr.slice(3, 6); }
function lastTwoOctets(arr) { return arr.slice(4, 6); }
HTMLElement.prototype.appendFirst = function(childNode){
if(this.firstChild)
this.insertBefore(childNode, this.firstChild);
else
this.appendChild(childNode);
};
function doCopy(element) {
element.disabled = false;
element.select();
try {
var successful = document.execCommand('copy');
var msg = successful ? 'Successfully' : 'Unsuccessfully';
displaySuccess(msg + " copied to clipboard.");
} catch (err) {
displayError("Oops, unable to copy to clipboard. You are on your own.");
} finally {
element.disabled = true;
}
}
function copyInput(element) {
return function(event) {
event.preventDefault();
doCopy(element);
}
}
document.getElementById("copy-mesh").addEventListener('click', copyInput(meshEl));
document.getElementById("copy-wlan").addEventListener('click', copyInput(wlanEl));
</script>
</body>
</html>