FileDocCategorySizeDatePackage
DhcpRequestPacket.javaAPI DocAndroid 5.1 API3004Thu Mar 12 22:22:10 GMT 2015android.net.dhcp

DhcpRequestPacket

public class DhcpRequestPacket extends DhcpPacket
This class implements the DHCP-REQUEST packet.

Fields Summary
Constructors Summary
DhcpRequestPacket(int transId, InetAddress clientIp, byte[] clientMac, boolean broadcast)
Generates a REQUEST packet with the specified parameters.

        super(transId, clientIp, Inet4Address.ANY, Inet4Address.ANY,
          Inet4Address.ANY, clientMac, broadcast);
Methods Summary
public java.nio.ByteBufferbuildPacket(int encap, short destUdp, short srcUdp)
Fills in a packet with the requested REQUEST attributes.

        ByteBuffer result = ByteBuffer.allocate(MAX_LENGTH);

        fillInPacket(encap, Inet4Address.ALL, Inet4Address.ANY, destUdp, srcUdp,
            result, DHCP_BOOTREQUEST, mBroadcast);
        result.flip();
        return result;
public voiddoNextOp(DhcpStateMachine machine)
Notifies the specified state machine of the REQUEST packet parameters.

        InetAddress clientRequest =
            mRequestedIp == null ? mClientIp : mRequestedIp;
        Log.v(TAG, "requested IP is " + mRequestedIp + " and client IP is " +
            mClientIp);
        machine.onRequestReceived(mBroadcast, mTransId, mClientMac,
            clientRequest, mRequestedParams, mHostName);
voidfinishPacket(java.nio.ByteBuffer buffer)
Adds the optional parameters to the client-generated REQUEST packet.

        byte[] clientId = new byte[7];

        // assemble client identifier
        clientId[0] = CLIENT_ID_ETHER;
        System.arraycopy(mClientMac, 0, clientId, 1, 6);

        addTlv(buffer, DHCP_MESSAGE_TYPE, DHCP_MESSAGE_TYPE_REQUEST);
        addTlv(buffer, DHCP_PARAMETER_LIST, mRequestedParams);
        addTlv(buffer, DHCP_REQUESTED_IP, mRequestedIp);
        addTlv(buffer, DHCP_SERVER_IDENTIFIER, mServerIdentifier);
        addTlv(buffer, DHCP_CLIENT_IDENTIFIER, clientId);
        addTlvEnd(buffer);
public java.lang.StringtoString()

        String s = super.toString();
        return s + " REQUEST, desired IP " + mRequestedIp + " from host '"
            + mHostName + "', param list length "
            + (mRequestedParams == null ? 0 : mRequestedParams.length);