Function parseIPv4

server/src/allowed-hosts.ts:25–35

(host: string)

const MDNS = /\.local$/i;

function parseIPv4(host: string): [number, number, number, number] | null {
  const m = IPV4_SHAPE.exec(host);
  if (!m) return null;
  const parts: number[] = [];
  for (let i = 1; i <= 4; i++) {
    const n = Number(m[i]);
    if (!Number.isInteger(n) || n < 0 || n > 255) return null;
    parts.push(n);
  }
  return parts as [number, number, number, number];
}

function isPrivateOrLoopbackV4(host: string): boolean {
  const ip = parseIPv4(host);