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/* Copyright (C) Ernesto Castellotti <mail@ernestocastellotti.it>
* SPDX-License-Identifier: MPL-2.0-no-copyleft-exception
*/
// Convert hex string to binary representation
function hex2bin(hexString){
var result = "";
hexString = hexString.replace(/0x/g, "").replace(/ /g, '').toLowerCase();
for(const hexChr of hexString) {
const bin = parseInt(hexChr, 16).toString(2).padStart(4, '0');
if (!bin.isNaN) {
result += bin;
} else {
throw new Error("The hex string is not valid!");
}
}
return result;
}
// Helper function to splice binary array and convert to decimal
function binSpliceToDec(binArray, len) {
const result = binArray.splice(0, len);
return parseInt(result.join(""), 2);
}
// GPON OMCI VLAN Table parser
function vlanTableParse(hexString) {
const binaryArray = hex2bin(hexString).split('');
var result = new Array();
while(binaryArray.length > 0) {
var vlanRule = new Array();
vlanRule.push(binSpliceToDec(binaryArray, 4));
vlanRule.push(binSpliceToDec(binaryArray, 13));
vlanRule.push(binSpliceToDec(binaryArray, 3));
binaryArray.splice(0, 12); // Padding
vlanRule.push( binSpliceToDec(binaryArray, 4));
vlanRule.push(binSpliceToDec(binaryArray, 13));
vlanRule.push(binSpliceToDec(binaryArray, 3));
binaryArray.splice(0, 8); // Padding
vlanRule.push(binSpliceToDec(binaryArray, 4));
vlanRule.push(binSpliceToDec(binaryArray, 2));
binaryArray.splice(0, 10); // Padding
vlanRule.push(binSpliceToDec(binaryArray, 4));
vlanRule.push(binSpliceToDec(binaryArray, 13));
vlanRule.push(binSpliceToDec(binaryArray, 3));
binaryArray.splice(0, 12); // Padding
vlanRule.push(binSpliceToDec(binaryArray, 4));
vlanRule.push(binSpliceToDec(binaryArray, 13));
vlanRule.push(binSpliceToDec(binaryArray, 3));
result.push(vlanRule);
}
return result;
}
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