17da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt/* 27da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * Copyright (C) 2010 The Android Open Source Project 37da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * 47da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * Licensed under the Apache License, Version 2.0 (the "License"); 57da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * you may not use this file except in compliance with the License. 67da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * You may obtain a copy of the License at 77da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * 87da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * http://www.apache.org/licenses/LICENSE-2.0 97da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * 107da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * Unless required by applicable law or agreed to in writing, software 117da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * distributed under the License is distributed on an "AS IS" BASIS, 127da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 137da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * See the License for the specific language governing permissions and 147da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * limitations under the License. 157da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt */ 167da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt 177da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnuttpackage android.net.dhcp; 187da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt 1951697effe9567a144532190ad534370a00c15996Lorenzo Colittiimport java.net.Inet4Address; 207da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnuttimport java.nio.ByteBuffer; 217da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt 227da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt/** 237da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * This class implements the DHCP-DECLINE packet. 247da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt */ 257da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnuttclass DhcpDeclinePacket extends DhcpPacket { 267da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt /** 277da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * Generates a DECLINE packet with the specified parameters. 287da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt */ 293e979321a5d96b9e2688f67ef0f936602c0f7e5aLorenzo Colitti DhcpDeclinePacket(int transId, short secs, Inet4Address clientIp, Inet4Address yourIp, 3051697effe9567a144532190ad534370a00c15996Lorenzo Colitti Inet4Address nextIp, Inet4Address relayIp, 317da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt byte[] clientMac) { 323e979321a5d96b9e2688f67ef0f936602c0f7e5aLorenzo Colitti super(transId, secs, clientIp, yourIp, nextIp, relayIp, clientMac, false); 337da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt } 347da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt 357da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt public String toString() { 367da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt String s = super.toString(); 377da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt return s + " DECLINE"; 387da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt } 397da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt 407da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt /** 417da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * Fills in a packet with the requested DECLINE attributes. 427da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt */ 437da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt public ByteBuffer buildPacket(int encap, short destUdp, short srcUdp) { 447da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt ByteBuffer result = ByteBuffer.allocate(MAX_LENGTH); 457da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt 467da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt fillInPacket(encap, mClientIp, mYourIp, destUdp, srcUdp, result, 477da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt DHCP_BOOTREQUEST, false); 487da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt result.flip(); 497da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt return result; 507da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt } 517da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt 527da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt /** 537da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * Adds optional parameters to the DECLINE packet. 547da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt */ 557da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt void finishPacket(ByteBuffer buffer) { 56f443bfc25e80ef46aedd616d4ecb4c95abd7be7aLorenzo Colitti addTlv(buffer, DHCP_MESSAGE_TYPE, DHCP_MESSAGE_TYPE_DECLINE); 57f443bfc25e80ef46aedd616d4ecb4c95abd7be7aLorenzo Colitti addTlv(buffer, DHCP_CLIENT_IDENTIFIER, getClientId()); 58f443bfc25e80ef46aedd616d4ecb4c95abd7be7aLorenzo Colitti // RFC 2131 says we MUST NOT include our common client TLVs or the parameter request list. 59f443bfc25e80ef46aedd616d4ecb4c95abd7be7aLorenzo Colitti addTlvEnd(buffer); 607da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt } 617da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt} 62