Merge "IP metrics: update link layer mapping"

import static android.net.NetworkCapabilities.TRANSPORT_BLUETOOTH;

import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;

import static android.net.NetworkCapabilities.TRANSPORT_ETHERNET;

import static android.net.NetworkCapabilities.TRANSPORT_LOWPAN;

import static android.net.NetworkCapabilities.TRANSPORT_VPN;

import static android.net.NetworkCapabilities.TRANSPORT_WIFI;

import static android.net.NetworkCapabilities.TRANSPORT_WIFI_AWARE;

        TRANSPORT_LINKLAYER_MAP[TRANSPORT_BLUETOOTH]  = IpConnectivityLogClass.BLUETOOTH;

        TRANSPORT_LINKLAYER_MAP[TRANSPORT_ETHERNET]   = IpConnectivityLogClass.ETHERNET;

        TRANSPORT_LINKLAYER_MAP[TRANSPORT_VPN]        = IpConnectivityLogClass.UNKNOWN;

        // TODO: change mapping TRANSPORT_WIFI_AWARE -> WIFI_AWARE

        TRANSPORT_LINKLAYER_MAP[TRANSPORT_WIFI_AWARE] = IpConnectivityLogClass.UNKNOWN;

        TRANSPORT_LINKLAYER_MAP[TRANSPORT_WIFI_AWARE] = IpConnectivityLogClass.WIFI_NAN;

        TRANSPORT_LINKLAYER_MAP[TRANSPORT_LOWPAN]     = IpConnectivityLogClass.LOWPAN;

    };

    private static int ifnameToLinkLayer(String ifname) {

        // Do not try to catch all interface names with regexes, instead only catch patterns that

        // are cheap to check, and otherwise fallback on postprocessing in aggregation layer.

        for (int i = 0; i < IFNAME_LINKLAYER_MAP.size(); i++) {

            String pattern = IFNAME_LINKLAYER_MAP.valueAt(i);

        for (int i = 0; i < KNOWN_PREFIX; i++) {

            String pattern = IFNAME_PREFIXES[i];

            if (ifname.startsWith(pattern)) {

                return IFNAME_LINKLAYER_MAP.keyAt(i);

                return IFNAME_LINKLAYERS[i];

            }

        }

        return IpConnectivityLogClass.UNKNOWN;

    }

    private static final SparseArray<String> IFNAME_LINKLAYER_MAP = new SparseArray<String>();

    private static final int KNOWN_PREFIX = 7;

    private static final String[] IFNAME_PREFIXES = new String[KNOWN_PREFIX];

    private static final int[] IFNAME_LINKLAYERS = new int[KNOWN_PREFIX];

    static {

        IFNAME_LINKLAYER_MAP.put(IpConnectivityLogClass.CELLULAR, "rmnet");

        IFNAME_LINKLAYER_MAP.put(IpConnectivityLogClass.WIFI, "wlan");

        IFNAME_LINKLAYER_MAP.put(IpConnectivityLogClass.BLUETOOTH, "bt-pan");

        // TODO: rekey to USB

        IFNAME_LINKLAYER_MAP.put(IpConnectivityLogClass.ETHERNET, "usb");

        // TODO: add mappings for nan -> WIFI_AWARE and p2p -> WIFI_P2P

        // Ordered from most likely link layer to least likely.

        IFNAME_PREFIXES[0] = "rmnet";

        IFNAME_LINKLAYERS[0] = IpConnectivityLogClass.CELLULAR;

        IFNAME_PREFIXES[1] = "wlan";

        IFNAME_LINKLAYERS[1] = IpConnectivityLogClass.WIFI;

        IFNAME_PREFIXES[2] = "bt-pan";

        IFNAME_LINKLAYERS[2] = IpConnectivityLogClass.BLUETOOTH;

        IFNAME_PREFIXES[3] = "p2p";

        IFNAME_LINKLAYERS[3] = IpConnectivityLogClass.WIFI_P2P;

        IFNAME_PREFIXES[4] = "aware";

        IFNAME_LINKLAYERS[4] = IpConnectivityLogClass.WIFI_NAN;

        IFNAME_PREFIXES[5] = "eth";

        IFNAME_LINKLAYERS[5] = IpConnectivityLogClass.ETHERNET;

        IFNAME_PREFIXES[6] = "wpan";

        IFNAME_LINKLAYERS[6] = IpConnectivityLogClass.LOWPAN;

    }

}