/// <summary>
/// DHCP handler.
/// </summary>
/// <param name="packetData">Packet data.</param>
/// <exception cref="OverflowException">Thrown if UDP_Data array length is greater than Int32.MaxValue.</exception>
/// <exception cref="sysIO.IOException">Thrown on IO error.</exception>
public static void DHCPHandler(byte[] packetData)
{
var dhcp_packet = new DHCPPacket(packetData);
var receiver = UdpClient.GetClient(dhcp_packet.DestinationPort);
if (receiver != null)
{
receiver.ReceiveData(dhcp_packet);
}
}
/// <summary>
/// Receive data
/// </summary>
/// <param name="timeout">timeout value, default 5000ms</param>
/// <returns>time value (-1 = timeout)</returns>
/// <exception cref="InvalidOperationException">Thrown on fatal error (contact support).</exception>
private int Receive(int timeout = 5000)
{
int second = 0;
int _deltaT = 0;
while (rxBuffer.Count < 1)
{
if (second > (timeout / 1000))
{
return(-1);
}
if (_deltaT != RTC.Second)
{
second++;
_deltaT = RTC.Second;
}
}
var packet = new DHCPPacket(rxBuffer.Dequeue().RawData);
if (packet.MessageType == 2) //Boot Reply
{
if (packet.RawData[284] == 0x02) //Offer packet received
{
Global.mDebugger.Send("Offer received.");
return(SendRequestPacket(packet.Client));
}
else if (packet.RawData[284] == 0x05 || packet.RawData[284] == 0x06) //ACK or NAK DHCP packet received
{
var ack = new DHCPAck(packet.RawData);
if (asked)
{
Apply(ack, true);
}
else
{
Apply(ack);
}
}
}
return(second);
}
