static TNLNetworkReachabilityStatus _NetworkReachabilityStatusFromFlags()

in Source/TNLCommunicationAgent.m [832:886]
42 lines of code
13 McCabe index (conditional complexity)

static TNLNetworkReachabilityStatus _NetworkReachabilityStatusFromFlags(TNLNetworkReachabilityFlags flags)
{
    if (tnl_available_ios_12) {
        const TNLNetworkReachabilityMask mask = flags;
        if (TNL_BITMASK_EXCLUDES_FLAGS(mask, TNLNetworkReachabilityMaskPathStatusSatisfied)) {
            return TNLNetworkReachabilityNotReachable;
        }

        if (TNL_BITMASK_INTERSECTS_FLAGS(mask, TNLNetworkReachabilityMaskPathIntefaceTypeWifi)) {
            return TNLNetworkReachabilityReachableViaEthernet;
        }

        if (TNL_BITMASK_INTERSECTS_FLAGS(mask, TNLNetworkReachabilityMaskPathIntefaceTypeWired)) {
            return TNLNetworkReachabilityReachableViaEthernet;
        }

        if (TNL_BITMASK_INTERSECTS_FLAGS(mask, TNLNetworkReachabilityMaskPathIntefaceTypeCellular)) {
            return TNLNetworkReachabilityReachableViaWWAN;
        }

        // "Other" happens when using VPN or other tunneling protocol.
        // On iOS/tvOS/watchOS devices: WiFi or Wired or Cellular would have been hit above.
        // On Mac and iOS Simulator: WiFi or Wired will _NOT_ be provide in the flags so, even though we coerce to WiFi in this case on Mac, presume Ethernet if we get here.
        if (TNL_BITMASK_INTERSECTS_FLAGS(mask, TNLNetworkReachabilityMaskPathIntefaceTypeOther)) {
            return TNLNetworkReachabilityReachableViaEthernet;
        }

        return TNLNetworkReachabilityUndetermined;
    }

    if (TNL_BITMASK_EXCLUDES_FLAGS(flags, kSCNetworkReachabilityFlagsReachable)) {
        return TNLNetworkReachabilityNotReachable;
    }

#if TARGET_OS_IOS
    if (TNL_BITMASK_INTERSECTS_FLAGS(flags, kSCNetworkReachabilityFlagsIsWWAN)) {
        return TNLNetworkReachabilityReachableViaWWAN;
    }
#endif

    if (TNL_BITMASK_EXCLUDES_FLAGS(flags, kSCNetworkReachabilityFlagsConnectionRequired)) {
        return TNLNetworkReachabilityReachableViaEthernet;
    }

    if (TNL_BITMASK_EXCLUDES_FLAGS(flags, kSCNetworkReachabilityFlagsInterventionRequired)) {
        if (TNL_BITMASK_INTERSECTS_FLAGS(flags, kSCNetworkReachabilityFlagsConnectionOnDemand)) {
            return TNLNetworkReachabilityReachableViaEthernet;
        }
        if (TNL_BITMASK_INTERSECTS_FLAGS(flags, kSCNetworkReachabilityFlagsConnectionOnTraffic)) {
            return TNLNetworkReachabilityReachableViaEthernet;
        }
    }

    return TNLNetworkReachabilityNotReachable;
}