Function getAddressFamily

src/utils/proxy.ts:41–55

(options: LookupOptions)

 * Handles: 0 | 4 | 6 | 'IPv4' | 'IPv6' | undefined
 */
export function getAddressFamily(options: LookupOptions): 0 | 4 | 6 {
  switch (options.family) {
    case 0:
    case 4:
    case 6:
      return options.family
    case 'IPv6':
      return 6
    case 'IPv4':
    case undefined:
      return 4
    default:
      throw new Error(`Unsupported address family: ${options.family}`)
  }
}

type EnvLike = Record<string, string | undefined>