diff options
Diffstat (limited to 'common/framework/com/android/net/module/util/InterfaceParams.java')
-rw-r--r-- | common/framework/com/android/net/module/util/InterfaceParams.java | 105 |
1 files changed, 0 insertions, 105 deletions
diff --git a/common/framework/com/android/net/module/util/InterfaceParams.java b/common/framework/com/android/net/module/util/InterfaceParams.java deleted file mode 100644 index 30762ebb..00000000 --- a/common/framework/com/android/net/module/util/InterfaceParams.java +++ /dev/null @@ -1,105 +0,0 @@ -/* - * Copyright (C) 2019 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -package com.android.net.module.util; - -import android.net.MacAddress; -import android.text.TextUtils; - -import java.net.NetworkInterface; -import java.net.SocketException; - - -/** - * Encapsulate the interface parameters common to IpClient/IpServer components. - * - * Basically all java.net.NetworkInterface methods throw Exceptions. IpClient - * and IpServer (sub)components need most or all of this information at some - * point during their lifecycles, so pass only this simplified object around - * which can be created once when IpClient/IpServer are told to start. - * - * @hide - */ -public class InterfaceParams { - public final String name; - public final int index; - public final boolean hasMacAddress; - public final MacAddress macAddr; - public final int defaultMtu; - - // TODO: move the below to NetworkStackConstants when this class is moved to the NetworkStack. - private static final int ETHER_MTU = 1500; - private static final int IPV6_MIN_MTU = 1280; - - - /** - * Return InterfaceParams corresponding with an interface name - * @param name the interface name - */ - public static InterfaceParams getByName(String name) { - final NetworkInterface netif = getNetworkInterfaceByName(name); - if (netif == null) return null; - - // Not all interfaces have MAC addresses, e.g. rmnet_data0. - final MacAddress macAddr = getMacAddress(netif); - - try { - return new InterfaceParams(name, netif.getIndex(), macAddr, netif.getMTU()); - } catch (IllegalArgumentException | SocketException e) { - return null; - } - } - - public InterfaceParams(String name, int index, MacAddress macAddr) { - this(name, index, macAddr, ETHER_MTU); - } - - public InterfaceParams(String name, int index, MacAddress macAddr, int defaultMtu) { - if (TextUtils.isEmpty(name)) { - throw new IllegalArgumentException("impossible interface name"); - } - - if (index <= 0) throw new IllegalArgumentException("invalid interface index"); - - this.name = name; - this.index = index; - this.hasMacAddress = (macAddr != null); - this.macAddr = hasMacAddress ? macAddr : MacAddress.fromBytes(new byte[] { - 0x02, 0x00, 0x00, 0x00, 0x00, 0x00 }); - this.defaultMtu = (defaultMtu > IPV6_MIN_MTU) ? defaultMtu : IPV6_MIN_MTU; - } - - @Override - public String toString() { - return String.format("%s/%d/%s/%d", name, index, macAddr, defaultMtu); - } - - private static NetworkInterface getNetworkInterfaceByName(String name) { - try { - return NetworkInterface.getByName(name); - } catch (NullPointerException | SocketException e) { - return null; - } - } - - private static MacAddress getMacAddress(NetworkInterface netif) { - try { - return MacAddress.fromBytes(netif.getHardwareAddress()); - } catch (IllegalArgumentException | NullPointerException | SocketException e) { - return null; - } - } -} |