Function getNonInternalInterfaceAddresses

src/node/services/serverService.ts:99–134

(
  networkInterfaces: NetworkInterfaces,
  family: "IPv4" | "IPv6"
)

}

function getNonInternalInterfaceAddresses(
  networkInterfaces: NetworkInterfaces,
  family: "IPv4" | "IPv6"
): string[] {
  const addresses: string[] = [];
  const emptyInfos: os.NetworkInterfaceInfo[] = [];

  for (const name of Object.keys(networkInterfaces)) {
    const infos: os.NetworkInterfaceInfo[] = networkInterfaces[name] ?? emptyInfos;
    for (const info of infos) {
      const infoFamily = info.family;

      if (infoFamily !== family) {
        continue;
      }

      if (info.internal) {
        continue;
      }

      const address = info.address;

      // Filter out link-local addresses (they are rarely what users want to copy/paste).
      if (family === "IPv4" && address.startsWith("169.254.")) {
        continue;
      }
      if (family === "IPv6" && address.toLowerCase().startsWith("fe80:")) {
        continue;
      }

      addresses.push(address);
    }
  }

  return Array.from(new Set(addresses)).sort();
}

function parseIpv4Octets(address: string): [number, number, number, number] | null {
  const parts = address.split(".");