SIPSorcery.Net.STUNServer.STUNSecondaryReceived C# (CSharp) Method

        public void STUNSecondaryReceived(IPEndPoint localEndPoint, IPEndPoint receivedEndPoint, byte[] buffer, int bufferLength)
        {
            try
            {
                //Console.WriteLine("\n=> received from " + IPSocketAddress.GetSocketString(receivedEndPoint) + " on " + IPSocketAddress.GetSocketString(receivedOnEndPoint));
                //Console.WriteLine(Utility.PrintBuffer(buffer));

                STUNMessage stunRequest = STUNMessage.ParseSTUNMessage(buffer, bufferLength);
                //Console.WriteLine(stunRequest.ToString());

                FireSTUNSecondaryRequestInTraceEvent(localEndPoint, receivedEndPoint, stunRequest);

                STUNMessage stunResponse = GetResponse(receivedEndPoint, stunRequest, true);
                byte[] stunResponseBuffer = stunResponse.ToByteBuffer();

                bool changeAddress = false;
                bool changePort = false;
                foreach (STUNAttribute attr in stunRequest.Attributes)
                {
                    if (attr.AttributeType == STUNAttributeTypesEnum.ChangeRequest)
                    {
                        STUNChangeRequestAttribute changeReqAttr = (STUNChangeRequestAttribute)attr;
                        changeAddress = changeReqAttr.ChangeAddress;
                        changePort = changeReqAttr.ChangePort;
                        break;
                    }
                }

                if (!changeAddress)
                {
                    if (!changePort)
                    {
                        //Console.WriteLine("<= sending to " + IPSocketAddress.GetSocketString(receivedEndPoint) + " from " + IPSocketAddress.GetSocketString(m_secondaryEndPoint));
                        m_secondarySend(receivedEndPoint, stunResponseBuffer);

                        FireSTUNSecondaryResponseOutTraceEvent(m_secondaryEndPoint, receivedEndPoint, stunResponse);
                    }
                    else
                    {
                        //Console.WriteLine("<= sending to " + IPSocketAddress.GetSocketString(receivedEndPoint) + " from " + IPSocketAddress.GetSocketString(m_secondaryDiffPortEndPoint));
                        m_secondaryDiffPortSocket.Send(stunResponseBuffer, stunResponseBuffer.Length, receivedEndPoint);

                        FireSTUNSecondaryResponseOutTraceEvent(m_secondaryDiffPortEndPoint, receivedEndPoint, stunResponse);
                    }
                }
                else
                {
                    if (!changePort)
                    {
                        //Console.WriteLine("<= sending to " + IPSocketAddress.GetSocketString(receivedEndPoint) + " from " + IPSocketAddress.GetSocketString(m_primaryEndPoint));
                        m_primarySend(receivedEndPoint, stunResponseBuffer);

                        FireSTUNPrimaryResponseOutTraceEvent(m_primaryEndPoint, receivedEndPoint, stunResponse);
                    }
                    else
                    {
                        //Console.WriteLine("<= sending to " + IPSocketAddress.GetSocketString(receivedEndPoint) + " from " + IPSocketAddress.GetSocketString(m_primaryDiffPortEndPoint));
                        m_primaryDiffPortSocket.Send(stunResponseBuffer, stunResponseBuffer.Length, receivedEndPoint);

                        FireSTUNPrimaryResponseOutTraceEvent(m_primaryDiffPortEndPoint, receivedEndPoint, stunResponse);
                    }
                }
            }
            catch (Exception excp)
            {
                logger.Debug("Exception STUNSecondaryReceived. " + excp.Message);
            }
        }