ip-num
Version:
A TypeScript library for working with IPv4, IPv6 and ASN numbers. It provides representations of these internet protocol numbers with the ability to perform various IP related operations like parsing, validating etc. on them
96 lines • 3.81 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.collapseIPv6Number = exports.expandIPv6Number = void 0;
const BinaryUtils_1 = require("./BinaryUtils");
const Validator_1 = require("./Validator");
let extractPrefix = (ipv6String) => {
return ipv6String.includes("/") ? `/${ipv6String.split("/")[1]}` : "";
};
/**
* Expands an IPv6 number in abbreviated format into its full form
*
* {@see https://en.wikipedia.org/wiki/IPv6_address#Representation} for more on the representation of IPv6 addresses
*
* @param {string} ipv6String the abbreviated IPv6 address to expand
* @returns {string} the expanded IPv6 address
*/
exports.expandIPv6Number = (ipv6String) => {
let expandWithZero = (hexadecimalArray) => {
let paddedArray = hexadecimalArray.map((hexadecimal) => {
return BinaryUtils_1.leftPadWithZeroBit(hexadecimal, 4);
});
return paddedArray.join(":");
};
let expandDoubleColon = (gapCount) => {
let pads = [];
for (let count = 0; count < gapCount; count++) {
pads.push("0000");
}
return pads.join(":");
};
if (/(:){3,}/.test(ipv6String))
throw "given IPv6 contains consecutive : more than two";
const prefix = extractPrefix(ipv6String);
if (ipv6String.includes("/")) {
ipv6String = ipv6String.split("/")[0];
}
let isValid = Validator_1.Validator.IPV6_PATTERN.test(ipv6String);
if (!isValid) {
throw Error(Validator_1.Validator.invalidIPv6PatternMessage);
}
if (ipv6String.includes("::")) {
let split = ipv6String.split("::");
let leftPortion = split[0];
let rightPortion = split[1];
let leftPortionSplit = leftPortion.split(":").filter(hexadecimal => { return hexadecimal !== ""; });
let rightPortionSplit = rightPortion.split(":").filter(hexadecimal => { return hexadecimal !== ""; });
let doublePortion = expandDoubleColon(8 - (leftPortionSplit.length + rightPortionSplit.length));
let leftString = expandWithZero(leftPortionSplit);
if (leftString !== "") {
leftString += ":";
}
let rightString = expandWithZero(rightPortionSplit);
if (rightString !== "") {
rightString = ":" + rightString;
}
return `${leftString}${doublePortion}${rightString}${prefix}`;
}
else {
return `${expandWithZero(ipv6String.split(":"))}${prefix}`;
}
};
/**
* Collapses an IPv6 number in full format into its abbreviated form
*
* {@see https://en.wikipedia.org/wiki/IPv6_address#Representation} for more on the representation of IPv6 addresses
*
* @param {string} ipv6String the full form IPv6 number to collapse
* @returns {string} the collapsed IPv6 number
*/
exports.collapseIPv6Number = (ipv6String) => {
const prefix = extractPrefix(ipv6String);
if (ipv6String.includes("/")) {
ipv6String = ipv6String.split("/")[0];
}
let isValid = Validator_1.Validator.IPV6_PATTERN.test(ipv6String);
if (!isValid) {
throw Error(Validator_1.Validator.invalidIPv6PatternMessage);
}
let hexadecimals = ipv6String.split(":");
let hexadecimalsWithoutLeadingZeros = hexadecimals.map((hexidecimal) => {
let withoutLeadingZero = hexidecimal.replace(/^0+/, '');
if (withoutLeadingZero !== '') {
return withoutLeadingZero;
}
else {
return "0";
}
});
let contracted = hexadecimalsWithoutLeadingZeros.join(":").replace(/((^0)?(:0){2,}|(^0)(:0){1,})/, ':');
if (contracted.slice(-1) === ":") {
return `${contracted}:${prefix}`;
}
contracted = contracted.replace(":0:", "::");
return `${contracted}${prefix}`;
};
//# sourceMappingURL=IPv6Utils.js.map