1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.net.dhcp; 18 19 import java.net.InetAddress; 20 import java.nio.ByteBuffer; 21 22 /** 23 * This class implements the DHCP-DECLINE packet. 24 */ 25 class DhcpDeclinePacket extends DhcpPacket { 26 /** 27 * Generates a DECLINE packet with the specified parameters. 28 */ 29 DhcpDeclinePacket(int transId, InetAddress clientIp, InetAddress yourIp, 30 InetAddress nextIp, InetAddress relayIp, 31 byte[] clientMac) { 32 super(transId, clientIp, yourIp, nextIp, relayIp, clientMac, false); 33 } 34 35 public String toString() { 36 String s = super.toString(); 37 return s + " DECLINE"; 38 } 39 40 /** 41 * Fills in a packet with the requested DECLINE attributes. 42 */ 43 public ByteBuffer buildPacket(int encap, short destUdp, short srcUdp) { 44 ByteBuffer result = ByteBuffer.allocate(MAX_LENGTH); 45 46 fillInPacket(encap, mClientIp, mYourIp, destUdp, srcUdp, result, 47 DHCP_BOOTREQUEST, false); 48 result.flip(); 49 return result; 50 } 51 52 /** 53 * Adds optional parameters to the DECLINE packet. 54 */ 55 void finishPacket(ByteBuffer buffer) { 56 // None needed 57 } 58 59 /** 60 * Informs the state machine of the arrival of a DECLINE packet. 61 */ 62 public void doNextOp(DhcpStateMachine machine) { 63 machine.onDeclineReceived(mClientMac, mRequestedIp); 64 } 65 } 66
