1. NetworkManagementService

继承了 INetworkManagementService.Stub，因此提供对应的 AIDL 定义的服务：

在 frameworks/base/core/java/android/os/INetworkManagementService.aidl 中定义

interface INetworkManagementService
{

    /* Register and unregister an observer to receive events. */
    void registerObserver(INetworkManagementEventObserver obs);
    void unregisterObserver(INetworkManagementEventObserver obs);

    /* Returns a list of currently known network interfaces */
    String[] listInterfaces();

    /* Retrieves the specified interface config */
    InterfaceConfiguration getInterfaceConfig(String iface);

    /* Sets the configuration of the specified interface */
    void setInterfaceConfig(String iface, in InterfaceConfiguration cfg);

    /* Clear all IP addresses on the specified interface */
    void clearInterfaceAddresses(String iface);

    /* Set interface up or down */
    void setInterfaceDown(String iface);
    void setInterfaceUp(String iface);

    ... /* IPv6 related */

    /* Add or remove the specified route to the interface.*/
    void addRoute(int netId, in RouteInfo route);
    void removeRoute(int netId, in RouteInfo route);

    /* Set the specified MTU size */
    void setMtu(String iface, int mtu);

    /* Shuts down the service */
    void shutdown();

    ....../* tethering related */

    /* Set or remove quota for an interface. */
    void setInterfaceQuota(String iface, long quotaBytes);
    void removeInterfaceQuota(String iface);

    /* Set or remove alert for an interface; requires that iface already has quota. */
    void setInterfaceAlert(String iface, long alertBytes);
    void removeInterfaceAlert(String iface);

    /* Set alert across all interfaces. */
    void setGlobalAlert(long alertBytes);

    /* Control network activity of a UID over interfaces with a quota limit. */
    void setUidMeteredNetworkDenylist(int uid, boolean enable);
    void setUidMeteredNetworkAllowlist(int uid, boolean enable);
    boolean setDataSaverModeEnabled(boolean enable);

    void setUidCleartextNetworkPolicy(int uid, int policy);

    /* Return status of bandwidth control module. */
    boolean isBandwidthControlEnabled();

    /* Sets or remove idletimer for an interface.
     *
     * This either initializes a new idletimer or increases its
     * reference-counting if an idletimer already exists for given
     * {@code iface}.
     *
     * {@code type} is the type of the interface, such as TYPE_MOBILE.
     *
     * Every {@code addIdleTimer} should be paired with a
     * {@link removeIdleTimer} to cleanup when the network disconnects.
     */
    void addIdleTimer(String iface, int timeout, int type);
    void removeIdleTimer(String iface);

    void setFirewallEnabled(boolean enabled);
    boolean isFirewallEnabled();
    void setFirewallInterfaceRule(String iface, boolean allow);
    void setFirewallUidRule(int chain, int uid, int rule);
    void setFirewallUidRules(int chain, in int[] uids, in int[] rules);
    void setFirewallChainEnabled(int chain, boolean enable);

    /* VPN related */
    void addVpnUidRanges(int netId, in UidRange[] ranges);
    void removeVpnUidRanges(int netId, in UidRange[] ranges);

    /* Start listening for mobile activity state changes. */
    void registerNetworkActivityListener(INetworkActivityListener listener);

    /* Stop listening for mobile activity state changes.*/
    void unregisterNetworkActivityListener(INetworkActivityListener listener);

    /* Check whether the mobile radio is currently active. */
    boolean isNetworkActive();

    /* Add or remove an interface to a network. */
    void addInterfaceToNetwork(String iface, int netId);
    void removeInterfaceFromNetwork(String iface, int netId);

    void addLegacyRouteForNetId(int netId, in RouteInfo routeInfo, int uid);

    void setDefaultNetId(int netId);
    void clearDefaultNetId();

    /* Set permission for a network.
     * @param permission PERMISSION_NONE to clear permissions.
     *                   PERMISSION_NETWORK or PERMISSION_SYSTEM to set permission.
     */
    void setNetworkPermission(int netId, int permission);

    /* Allow or deny UID to call protect(). */
    void allowProtect(int uid);
    void denyProtect(int uid);

    void addInterfaceToLocalNetwork(String iface, in List<RouteInfo> routes);
    void removeInterfaceFromLocalNetwork(String iface);
    int removeRoutesFromLocalNetwork(in List<RouteInfo> routes);

    boolean isNetworkRestricted(int uid);
}

2.  WIFI_SERVICE_CLASS 服务

初始化发生在 WifiService 类，实际实现在 WifiServiceImpl 类，而继承了 BaseWifiService，实现了 IWifiManager （IWifiManager.Stub）的接口，即为对客户端层面需要提供的服务。

IWifiManager 定义如下：

文件为：frameworks/base/wifi/java/android/net/wifi/IWifiManager.aidl

interface IWifiManager
{
    long getSupportedFeatures();

    oneway void getWifiActivityEnergyInfoAsync(in IOnWifiActivityEnergyInfoListener listener);

    ParceledListSlice getConfiguredNetworks(String packageName, String featureId);

    ParceledListSlice getPrivilegedConfiguredNetworks(String packageName, String featureId);

    Map getAllMatchingFqdnsForScanResults(in List<ScanResult> scanResult);

    Map getMatchingOsuProviders(in List<ScanResult> scanResult);

    Map getMatchingPasspointConfigsForOsuProviders(in List<OsuProvider> osuProviders);

    int addOrUpdateNetwork(in WifiConfiguration config, String packageName);

    boolean addOrUpdatePasspointConfiguration(in PasspointConfiguration config, String packageName);

    boolean removePasspointConfiguration(in String fqdn, String packageName);

    List<PasspointConfiguration> getPasspointConfigurations(in String packageName);

    List<WifiConfiguration> getWifiConfigsForPasspointProfiles(in List<String> fqdnList);

    void queryPasspointIcon(long bssid, String fileName);

    int matchProviderWithCurrentNetwork(String fqdn);

    void deauthenticateNetwork(long holdoff, boolean ess);

    boolean removeNetwork(int netId, String packageName);