hono
Version:
Web framework built on Web Standards
83 lines (82 loc) • 2.15 kB
JavaScript
// src/utils/ipaddr.ts
var expandIPv6 = (ipV6) => {
const sections = ipV6.split(":");
for (let i = 0; i < sections.length; i++) {
const node = sections[i];
if (node !== "") {
sections[i] = node.padStart(4, "0");
} else {
sections[i + 1] === "" && sections.splice(i + 1, 1);
sections[i] = new Array(8 - sections.length + 1).fill("0000").join(":");
}
}
return sections.join(":");
};
var IPV4_REGEX = /^[0-9]{0,3}\.[0-9]{0,3}\.[0-9]{0,3}\.[0-9]{0,3}$/;
var distinctRemoteAddr = (remoteAddr) => {
if (IPV4_REGEX.test(remoteAddr)) {
return "IPv4";
}
if (remoteAddr.includes(":")) {
return "IPv6";
}
};
var convertIPv4ToBinary = (ipv4) => {
const parts = ipv4.split(".");
let result = 0n;
for (let i = 0; i < 4; i++) {
result <<= 8n;
result += BigInt(parts[i]);
}
return result;
};
var convertIPv6ToBinary = (ipv6) => {
const sections = expandIPv6(ipv6).split(":");
let result = 0n;
for (let i = 0; i < 8; i++) {
result <<= 16n;
result += BigInt(parseInt(sections[i], 16));
}
return result;
};
var convertIPv6BinaryToString = (ipV6) => {
const sections = [];
for (let i = 0; i < 8; i++) {
sections.push((ipV6 >> BigInt(16 * (7 - i)) & 0xffffn).toString(16));
}
let currentZeroStart = -1;
let maxZeroStart = -1;
let maxZeroEnd = -1;
for (let i = 0; i < 8; i++) {
if (sections[i] === "0") {
if (currentZeroStart === -1) {
currentZeroStart = i;
}
} else {
if (currentZeroStart > -1) {
if (i - currentZeroStart > maxZeroEnd - maxZeroStart) {
maxZeroStart = currentZeroStart;
maxZeroEnd = i;
}
currentZeroStart = -1;
}
}
}
if (currentZeroStart > -1) {
if (8 - currentZeroStart > maxZeroEnd - maxZeroStart) {
maxZeroStart = currentZeroStart;
maxZeroEnd = 8;
}
}
if (maxZeroStart !== -1) {
sections.splice(maxZeroStart, maxZeroEnd - maxZeroStart, ":");
}
return sections.join(":").replace(/:{2,}/g, "::");
};
export {
convertIPv4ToBinary,
convertIPv6BinaryToString,
convertIPv6ToBinary,
distinctRemoteAddr,
expandIPv6
};