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 197da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnuttimport java.net.InetAddress; 207da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnuttimport java.nio.ByteBuffer; 217da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt 227da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt/** 237da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * This class implements the (unused) DHCP-INFORM packet. 247da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt */ 257da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnuttclass DhcpInformPacket extends DhcpPacket { 267da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt /** 277da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * Generates an INFORM packet with the specified parameters. 287da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt */ 297da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt DhcpInformPacket(int transId, InetAddress clientIp, InetAddress yourIp, 307da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt InetAddress nextIp, InetAddress relayIp, 317da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt byte[] clientMac) { 327da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt super(transId, 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 + " INFORM"; 387da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt } 397da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt 407da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt /** 417da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * Builds an INFORM packet. 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 additional parameters to the INFORM packet. 547da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt */ 557da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt void finishPacket(ByteBuffer buffer) { 567da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt byte[] clientId = new byte[7]; 577da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt 587da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt clientId[0] = CLIENT_ID_ETHER; 597da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt System.arraycopy(mClientMac, 0, clientId, 1, 6); 607da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt 617da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt addTlv(buffer, DHCP_MESSAGE_TYPE, DHCP_MESSAGE_TYPE_REQUEST); 627da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt addTlv(buffer, DHCP_PARAMETER_LIST, mRequestedParams); 637da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt addTlvEnd(buffer); 647da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt } 657da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt 667da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt /** 677da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * Informs the state machine of the arrival of an INFORM packet. Not 687da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * used currently. 697da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt */ 707da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt public void doNextOp(DhcpStateMachine machine) { 717da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt InetAddress clientRequest = 727da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt mRequestedIp == null ? mClientIp : mRequestedIp; 737da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt machine.onInformReceived(mTransId, mClientMac, clientRequest, 747da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt mRequestedParams); 757da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt } 767da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt} 77