Examples with DHCPOption net.floodlightcontroller.packet.DHCPOption used on opensource projects

Example 1 with DHCPOption

use of net.floodlightcontroller.packet.DHCPOption in project open-kilda by telstra.

the class PacketFactory method DhcpDiscoveryRequestEthernet.

/**
 * Generates a DHCP request Ethernet frame.
 * @param hostMac The host MAC address of for the request.
 * @returnAn An Ethernet frame that contains a DHCP request packet.
 */
public static Ethernet DhcpDiscoveryRequestEthernet(MacAddress hostMac) {
    List<DHCPOption> optionList = new ArrayList<DHCPOption>();
    byte[] requestValue = new byte[4];
    requestValue[0] = requestValue[1] = requestValue[2] = requestValue[3] = 0;
    DHCPOption requestOption = new DHCPOption().setCode(DHCP.DHCPOptionCode.OptionCode_RequestedIP.getValue()).setLength((byte) 4).setData(requestValue);
    byte[] msgTypeValue = new byte[1];
    // DHCP request
    msgTypeValue[0] = 1;
    DHCPOption msgTypeOption = new DHCPOption().setCode(DHCP.DHCPOptionCode.OptionCode_MessageType.getValue()).setLength((byte) 1).setData(msgTypeValue);
    byte[] reqParamValue = new byte[4];
    // subnet mask
    reqParamValue[0] = 1;
    // Router
    reqParamValue[1] = 3;
    // Domain Name Server
    reqParamValue[2] = 6;
    // NTP Server
    reqParamValue[3] = 42;
    DHCPOption reqParamOption = new DHCPOption().setCode(DHCP.DHCPOptionCode.OptionCode_RequestedParameters.getValue()).setLength((byte) 4).setData(reqParamValue);
    byte[] clientIdValue = new byte[7];
    // Ethernet
    clientIdValue[0] = 1;
    System.arraycopy(hostMac.getBytes(), 0, clientIdValue, 1, 6);
    DHCPOption clientIdOption = new DHCPOption().setCode(DHCP.DHCPOptionCode.OptionCode_ClientID.getValue()).setLength((byte) 7).setData(clientIdValue);
    DHCPOption endOption = new DHCPOption().setCode(DHCP.DHCPOptionCode.OptionCode_END.getValue()).setLength((byte) 0).setData(null);
    optionList.add(requestOption);
    optionList.add(msgTypeOption);
    optionList.add(reqParamOption);
    optionList.add(clientIdOption);
    optionList.add(endOption);
    Ethernet requestPacket = new Ethernet();
    requestPacket.setSourceMACAddress(hostMac.getBytes()).setDestinationMACAddress(broadcastMac).setEtherType(EthType.IPv4).setPayload(new IPv4().setVersion((byte) 4).setDiffServ((byte) 0).setIdentification((short) 100).setFlags((byte) 0).setFragmentOffset((short) 0).setTtl((byte) 250).setProtocol(IpProtocol.UDP).setChecksum((short) 0).setSourceAddress(0).setDestinationAddress(broadcastIp).setPayload(new UDP().setSourcePort(UDP.DHCP_CLIENT_PORT).setDestinationPort(UDP.DHCP_SERVER_PORT).setChecksum((short) 0).setPayload(new DHCP().setOpCode(DHCP.OPCODE_REQUEST).setHardwareType(DHCP.HWTYPE_ETHERNET).setHardwareAddressLength((byte) 6).setHops((byte) 0).setTransactionId(0x00003d1d).setSeconds((short) 0).setFlags((short) 0).setClientIPAddress(IPv4Address.NONE).setYourIPAddress(IPv4Address.NONE).setServerIPAddress(IPv4Address.NONE).setGatewayIPAddress(IPv4Address.NONE).setClientHardwareAddress(hostMac).setOptions(optionList))));
    return requestPacket;
}