private void OnReceive(IAsyncResult result)
{
DhcpData data = new DhcpData((Byte[])result.AsyncState);
data.Result = result;
if (!this.m_Abort)
{
Trace.TraceInformation("Dhcp Messages Received, Queued for Processing.");
// Queue this request for processing
ThreadPool.QueueUserWorkItem(new WaitCallback(this.CompleteRequest), data);
this.Listen();
}
}
private void OnReceive(IAsyncResult result)
{
DhcpData data = new DhcpData((Byte[])result.AsyncState);
data.Result = result;
if (!this.m_Abort)
{
Trace.TraceInformation("Dhcp Messages Received, Queued for Processing.");
// Queue this request for processing
ThreadPool.QueueUserWorkItem(new WaitCallback(this.CompleteRequest), data);
this.Listen();
}
}
private void CompleteRequest(Object state)
{
DhcpData messageData = (DhcpData)state;
EndPoint source = new IPEndPoint(0, 0);
this.m_AbortLock.AcquireReaderLock(-1);
try {
if (this.m_Abort)
{
return;
}
messageData.BufferSize = this.m_DhcpSocket.EndReceiveFrom(messageData.Result, ref source);
messageData.Source = (IPEndPoint)source;
} catch (ArgumentException ex) {
Trace.TraceInformation("DHCP: " + ex.Message);
return;
} finally
{
this.m_AbortLock.ReleaseLock();
}
DhcpMessage message;
try
{
message = new DhcpMessage(messageData);
}
catch (ArgumentException ex)
{
TraceException("Error Parsing Dhcp Message", ex);
return;
}
catch (InvalidCastException ex)
{
TraceException("Error Parsing Dhcp Message", ex);
return;
}
catch (IndexOutOfRangeException ex)
{
TraceException("Error Parsing Dhcp Message", ex);
return;
}
catch (Exception ex)
{
TraceException("Error Parsing Dhcp Message", ex);
throw;
}
if (message.Operation == DhcpOperation.BootRequest)
{
Byte[] messageTypeData = message.GetOptionData(DhcpOption.DhcpMessageType);
if (messageTypeData != null && messageTypeData.Length == 1)
{
DhcpMessageType messageType = (DhcpMessageType)messageTypeData[0];
switch (messageType)
{
case DhcpMessageType.Discover:
Trace.TraceInformation("{0} Dhcp DISCOVER Message Received.", Thread.CurrentThread.ManagedThreadId);
this.DhcpDiscover(message);
Trace.TraceInformation("{0} Dhcp DISCOVER Message Processed.", Thread.CurrentThread.ManagedThreadId);
break;
case DhcpMessageType.Request:
Trace.TraceInformation("{0} Dhcp REQUEST Message Received.", Thread.CurrentThread.ManagedThreadId);
this.DhcpRequest(message);
Trace.TraceInformation("{0} Dhcp REQUEST Message Processed.", Thread.CurrentThread.ManagedThreadId);
break;
default:
Trace.TraceWarning("Unknown Dhcp Message ({0}) Received, Ignoring.", messageType.ToString());
break;
}
}
else
{
Trace.TraceWarning("Unknown Dhcp Data Received, Ignoring.");
}
}
}
internal DhcpMessage(DhcpData data)
: this(data.MessageBuffer)
{
}
internal DhcpMessage(DhcpData data)
: this(data.MessageBuffer)
{
}
