Function expandIpv6

server/modules/outboundTargetPolicy.js:152–168

(address)

}

function expandIpv6(address) {
  // Returns an array of 8 numeric hextets, or null if not a valid IPv6 literal.
  const stripped = address.replace(/^\[|\]$/g, "");
  if (net.isIP(stripped) !== 6) return null;
  const [head, tail] = stripped.split("::");
  const headParts = head ? head.split(":") : [];
  const tailParts = tail !== undefined && tail !== "" ? tail.split(":") : [];
  const fill = 8 - headParts.length - tailParts.length;
  if (fill < 0) return null;
  const parts = [
    ...headParts,
    ...Array(tail !== undefined ? fill : 0).fill("0"),
    ...tailParts,
  ];
  if (parts.length !== 8) return null;
  return parts.map((p) => parseInt(p || "0", 16) & 0xffff);
}

function isMetadataAddress(address) {
  if (METADATA_IP_ADDRESSES.has(address)) return true;