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 android.util.Log; 207da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt 217da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnuttimport java.net.InetAddress; 227da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnuttimport java.net.Inet4Address; 237da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnuttimport java.nio.ByteBuffer; 247da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt 257da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt/** 267da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * This class implements the DHCP-REQUEST packet. 277da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt */ 287da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnuttclass DhcpRequestPacket extends DhcpPacket { 297da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt /** 307da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * Generates a REQUEST packet with the specified parameters. 317da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt */ 327da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt DhcpRequestPacket(int transId, InetAddress clientIp, byte[] clientMac, 337da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt boolean broadcast) { 347da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt super(transId, clientIp, Inet4Address.ANY, Inet4Address.ANY, 357da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt Inet4Address.ANY, clientMac, broadcast); 367da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt } 377da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt 387da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt public String toString() { 397da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt String s = super.toString(); 407da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt return s + " REQUEST, desired IP " + mRequestedIp + " from host '" 417da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt + mHostName + "', param list length " 427da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt + (mRequestedParams == null ? 0 : mRequestedParams.length); 437da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt } 447da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt 457da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt /** 467da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * Fills in a packet with the requested REQUEST attributes. 477da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt */ 487da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt public ByteBuffer buildPacket(int encap, short destUdp, short srcUdp) { 497da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt ByteBuffer result = ByteBuffer.allocate(MAX_LENGTH); 507da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt 517da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt fillInPacket(encap, Inet4Address.ALL, Inet4Address.ANY, destUdp, srcUdp, 527da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt result, DHCP_BOOTREQUEST, mBroadcast); 537da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt result.flip(); 547da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt return result; 557da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt } 567da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt 577da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt /** 587da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * Adds the optional parameters to the client-generated REQUEST packet. 597da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt */ 607da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt void finishPacket(ByteBuffer buffer) { 617da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt byte[] clientId = new byte[7]; 627da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt 637da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt // assemble client identifier 647da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt clientId[0] = CLIENT_ID_ETHER; 657da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt System.arraycopy(mClientMac, 0, clientId, 1, 6); 667da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt 677da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt addTlv(buffer, DHCP_MESSAGE_TYPE, DHCP_MESSAGE_TYPE_REQUEST); 687da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt addTlv(buffer, DHCP_PARAMETER_LIST, mRequestedParams); 697da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt addTlv(buffer, DHCP_REQUESTED_IP, mRequestedIp); 707da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt addTlv(buffer, DHCP_SERVER_IDENTIFIER, mServerIdentifier); 717da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt addTlv(buffer, DHCP_CLIENT_IDENTIFIER, clientId); 727da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt addTlvEnd(buffer); 737da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt } 747da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt 757da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt /** 767da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt * Notifies the specified state machine of the REQUEST packet parameters. 777da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt */ 787da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt public void doNextOp(DhcpStateMachine machine) { 797da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt InetAddress clientRequest = 807da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt mRequestedIp == null ? mClientIp : mRequestedIp; 817da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt Log.v(TAG, "requested IP is " + mRequestedIp + " and client IP is " + 827da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt mClientIp); 837da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt machine.onRequestReceived(mBroadcast, mTransId, mClientMac, 847da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt clientRequest, mRequestedParams, mHostName); 857da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt } 867da02ad3b7a8a0b13a2ccc84e666baa8e6370482Stan Chesnutt} 87