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BACnetClient.cs
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BACnetClient.cs
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/**************************************************************************
* MIT License
*
* Copyright (C) 2014 Morten Kvistgaard <mk@pch-engineering.dk>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*********************************************************************/
using System.Collections.Concurrent;
namespace System.IO.BACnet;
public delegate void MessageRecievedHandler(IBacnetTransport sender, byte[] buffer, int offset, int msgLength, BacnetAddress remoteAddress);
/// <summary>
/// BACnet network client or server
/// </summary>
public class BacnetClient : IDisposable
{
private int _retries;
private int _invokeId;
private readonly LastSegmentAck _lastSegmentAck = new();
private uint _writepriority;
/// <summary>
/// Dictionary of List of Tuples with sequence-number and byte[] per invoke-id
/// TODO: invoke-id should be PER (remote) DEVICE!
/// </summary>
private Dictionary<byte, List<Tuple<byte, byte[]>>> _segmentsPerInvokeId = new();
private ConcurrentDictionary<byte, object> _locksPerInvokeId = new();
private Dictionary<byte, byte> _expectedSegmentsPerInvokeId = new();
public const int DEFAULT_UDP_PORT = 0xBAC0;
public const int DEFAULT_TIMEOUT = 1000;
public const int DEFAULT_RETRIES = 3;
public IBacnetTransport Transport { get; }
public ushort VendorId { get; set; } = 260;
public int Timeout { get; set; }
public int TransmitTimeout { get; set; } = 30000;
public BacnetMaxSegments MaxSegments { get; set; } = BacnetMaxSegments.MAX_SEG0;
public byte ProposedWindowSize { get; set; } = 10;
public bool ForceWindowSize { get; set; }
public bool DefaultSegmentationHandling { get; set; } = true;
public ILog Log { get; set; } = LogManager.GetLogger<BacnetClient>();
/// <summary>
/// Used as the number of tentatives
/// </summary>
public int Retries
{
get => _retries;
set => _retries = Math.Max(1, value);
}
public uint WritePriority
{
get => _writepriority;
set { if (value < 17) _writepriority = value; }
}
// These members allows to access undecoded buffer by the application
// layer, when the basic undecoding process is not really able to do the job
// in particular with application_specific_encoding values
public byte[] raw_buffer;
public int raw_offset, raw_length;
public class Segmentation
{
// ReSharper disable InconsistentNaming
// was public before refactor so can't change this
public EncodeBuffer buffer;
public byte sequence_number;
public byte window_size;
public byte max_segments;
// ReSharper restore InconsistentNaming
}
private class LastSegmentAck
{
private readonly ManualResetEvent _wait = new(false);
private readonly object _lockObject = new();
private BacnetAddress _address;
private byte _invokeId;
public byte SequenceNumber;
public byte WindowSize;
public void Set(BacnetAddress adr, byte invokeId, byte sequenceNumber, byte windowSize)
{
lock (_lockObject)
{
_address = adr;
_invokeId = invokeId;
SequenceNumber = sequenceNumber;
WindowSize = windowSize;
_wait.Set();
}
}
public bool Wait(BacnetAddress adr, byte invokeId, int timeout)
{
Monitor.Enter(_lockObject);
while (!adr.Equals(this._address) || this._invokeId != invokeId)
{
_wait.Reset();
Monitor.Exit(_lockObject);
if (!_wait.WaitOne(timeout)) return false;
Monitor.Enter(_lockObject);
}
Monitor.Exit(_lockObject);
_address = null;
return true;
}
}
public BacnetClient(int port = DEFAULT_UDP_PORT, int timeout = DEFAULT_TIMEOUT, int retries = DEFAULT_RETRIES)
: this(new BacnetIpUdpProtocolTransport(port), timeout, retries)
{
}
public BacnetClient(IBacnetTransport transport, int timeout = DEFAULT_TIMEOUT, int retries = DEFAULT_RETRIES)
{
Transport = transport;
Timeout = timeout;
Retries = retries;
}
public override bool Equals(object obj)
{
return Transport.Equals((obj as BacnetClient)?.Transport);
}
public override int GetHashCode()
{
return Transport.GetHashCode();
}
public override string ToString()
{
return Transport.ToString();
}
public EncodeBuffer GetEncodeBuffer(int startOffset)
{
return new EncodeBuffer(new byte[Transport.MaxBufferLength], startOffset);
}
public void Start()
{
Transport.Start();
Transport.MessageRecieved += OnRecieve;
Log.Info("Started communication");
}
public delegate void ConfirmedServiceRequestHandler(BacnetClient sender, BacnetAddress adr, BacnetPduTypes type, BacnetConfirmedServices service, BacnetMaxSegments maxSegments, BacnetMaxAdpu maxAdpu, byte invokeId, byte[] buffer, int offset, int length);
public event ConfirmedServiceRequestHandler OnConfirmedServiceRequest;
public delegate void ReadPropertyRequestHandler(BacnetClient sender, BacnetAddress adr, byte invokeId, BacnetObjectId objectId, BacnetPropertyReference property, BacnetMaxSegments maxSegments);
public event ReadPropertyRequestHandler OnReadPropertyRequest;
public delegate void ReadPropertyMultipleRequestHandler(BacnetClient sender, BacnetAddress adr, byte invokeId, IList<BacnetReadAccessSpecification> properties, BacnetMaxSegments maxSegments);
public event ReadPropertyMultipleRequestHandler OnReadPropertyMultipleRequest;
public delegate void WritePropertyRequestHandler(BacnetClient sender, BacnetAddress adr, byte invokeId, BacnetObjectId objectId, BacnetPropertyValue value, BacnetMaxSegments maxSegments);
public event WritePropertyRequestHandler OnWritePropertyRequest;
public delegate void WritePropertyMultipleRequestHandler(BacnetClient sender, BacnetAddress adr, byte invokeId, BacnetObjectId objectId, ICollection<BacnetPropertyValue> values, BacnetMaxSegments maxSegments);
public event WritePropertyMultipleRequestHandler OnWritePropertyMultipleRequest;
public delegate void AtomicWriteFileRequestHandler(BacnetClient sender, BacnetAddress adr, byte invokeId, bool isStream, BacnetObjectId objectId, int position, uint blockCount, byte[][] blocks, int[] counts, BacnetMaxSegments maxSegments);
public event AtomicWriteFileRequestHandler OnAtomicWriteFileRequest;
public delegate void AtomicReadFileRequestHandler(BacnetClient sender, BacnetAddress adr, byte invokeId, bool isStream, BacnetObjectId objectId, int position, uint count, BacnetMaxSegments maxSegments);
public event AtomicReadFileRequestHandler OnAtomicReadFileRequest;
public delegate void SubscribeCOVRequestHandler(BacnetClient sender, BacnetAddress adr, byte invokeId, uint subscriberProcessIdentifier, BacnetObjectId monitoredObjectIdentifier, bool cancellationRequest, bool issueConfirmedNotifications, uint lifetime, BacnetMaxSegments maxSegments);
public event SubscribeCOVRequestHandler OnSubscribeCOV;
public delegate void EventNotificationCallbackHandler(BacnetClient sender, BacnetAddress adr, byte invokeId, BacnetEventNotificationData eventData, bool needConfirm);
public event EventNotificationCallbackHandler OnEventNotify;
public delegate void SubscribeCOVPropertyRequestHandler(BacnetClient sender, BacnetAddress adr, byte invokeId, uint subscriberProcessIdentifier, BacnetObjectId monitoredObjectIdentifier, BacnetPropertyReference monitoredProperty, bool cancellationRequest, bool issueConfirmedNotifications, uint lifetime, float covIncrement, BacnetMaxSegments maxSegments);
public event SubscribeCOVPropertyRequestHandler OnSubscribeCOVProperty;
public delegate void DeviceCommunicationControlRequestHandler(BacnetClient sender, BacnetAddress adr, byte invokeId, uint timeDuration, uint enableDisable, string password, BacnetMaxSegments maxSegments);
public event DeviceCommunicationControlRequestHandler OnDeviceCommunicationControl;
public delegate void ReinitializedRequestHandler(BacnetClient sender, BacnetAddress adr, byte invokeId, BacnetReinitializedStates state, string password, BacnetMaxSegments maxSegments);
public event ReinitializedRequestHandler OnReinitializedDevice;
public delegate void ReadRangeHandler(BacnetClient sender, BacnetAddress adr, byte invokeId, BacnetObjectId objectId, BacnetPropertyReference property, BacnetReadRangeRequestTypes requestType, uint position, DateTime time, int count, BacnetMaxSegments maxSegments);
public event ReadRangeHandler OnReadRange;
public delegate void CreateObjectRequestHandler(BacnetClient sender, BacnetAddress adr, byte invokeId, BacnetObjectId objectId, ICollection<BacnetPropertyValue> values, BacnetMaxSegments maxSegments);
public event CreateObjectRequestHandler OnCreateObjectRequest;
public delegate void DeleteObjectRequestHandler(BacnetClient sender, BacnetAddress adr, byte invokeId, BacnetObjectId objectId, BacnetMaxSegments maxSegments);
public event DeleteObjectRequestHandler OnDeleteObjectRequest;
public delegate void GetAlarmSummaryOrEventInformationRequestHandler(BacnetClient sender, BacnetAddress adr, byte invokeId, bool getEvent, BacnetObjectId objectId, BacnetMaxAdpu maxApdu, BacnetMaxSegments max_segments);
public event GetAlarmSummaryOrEventInformationRequestHandler OnGetAlarmSummaryOrEventInformation;
public delegate void AlarmAcknowledgeRequestHandler(BacnetClient sender, BacnetAddress adr, byte invokeId, uint ackProcessIdentifier, BacnetObjectId eventObjectIdentifier, uint eventStateAcked, string ackSource, BacnetGenericTime eventTimeStamp, BacnetGenericTime ackTimeStamp);
public event AlarmAcknowledgeRequestHandler OnAlarmAcknowledge;
protected void ProcessConfirmedServiceRequest(BacnetAddress address, BacnetPduTypes type, BacnetConfirmedServices service, BacnetMaxSegments maxSegments, BacnetMaxAdpu maxAdpu, byte invokeId, byte[] buffer, int offset, int length)
{
try
{
Log.Debug($"ConfirmedServiceRequest {service}");
raw_buffer = buffer;
raw_length = length;
raw_offset = offset;
OnConfirmedServiceRequest?.Invoke(this, address, type, service, maxSegments, maxAdpu, invokeId, buffer, offset, length);
//don't send segmented messages, if client don't want it
if ((type & BacnetPduTypes.SEGMENTED_RESPONSE_ACCEPTED) == 0)
maxSegments = BacnetMaxSegments.MAX_SEG0;
if (service == BacnetConfirmedServices.SERVICE_CONFIRMED_READ_PROPERTY && OnReadPropertyRequest != null)
{
int thsRejectReason;
if ((thsRejectReason = Services.DecodeReadProperty(buffer, offset, length, out var objectId, out var property)) >= 0)
{
OnReadPropertyRequest(this, address, invokeId, objectId, property, maxSegments);
}
else
{
switch (thsRejectReason)
{
case -1:
SendConfirmedServiceReject(address, invokeId, BacnetRejectReason.MISSING_REQUIRED_PARAMETER);
break;
case -2:
SendConfirmedServiceReject(address, invokeId, BacnetRejectReason.INVALID_TAG);
break;
case -3:
SendConfirmedServiceReject(address, invokeId, BacnetRejectReason.TOO_MANY_ARGUMENTS);
break;
}
Log.Warn("Couldn't decode DecodeReadProperty");
}
}
else if (service == BacnetConfirmedServices.SERVICE_CONFIRMED_WRITE_PROPERTY && OnWritePropertyRequest != null)
{
if (Services.DecodeWriteProperty(address, buffer, offset, length, out var objectId, out var value) >= 0)
OnWritePropertyRequest(this, address, invokeId, objectId, value, maxSegments);
else
{
// DAL
SendAbort(address, invokeId, BacnetAbortReason.OTHER);
//ErrorResponse(address, service, invokeId, BacnetErrorClasses.ERROR_CLASS_SERVICES, BacnetErrorCodes.ERROR_CODE_ABORT_OTHER);
//SendConfirmedServiceReject(adr, invokeId, BacnetRejectReason.OTHER);
Log.Warn("Couldn't decode DecodeWriteProperty");
}
}
else if (service == BacnetConfirmedServices.SERVICE_CONFIRMED_READ_PROP_MULTIPLE && OnReadPropertyMultipleRequest != null)
{
if (Services.DecodeReadPropertyMultiple(buffer, offset, length, out var properties) >= 0)
OnReadPropertyMultipleRequest(this, address, invokeId, properties, maxSegments);
else
{
// DAL
SendAbort(address, invokeId, BacnetAbortReason.OTHER);
//ErrorResponse(address, service, invokeId, BacnetErrorClasses.ERROR_CLASS_SERVICES, BacnetErrorCodes.ERROR_CODE_ABORT_OTHER);
Log.Warn("Couldn't decode DecodeReadPropertyMultiple");
}
}
else if (service == BacnetConfirmedServices.SERVICE_CONFIRMED_WRITE_PROP_MULTIPLE && OnWritePropertyMultipleRequest != null)
{
if (Services.DecodeWritePropertyMultiple(address, buffer, offset, length, out var objectId, out var values) >= 0)
OnWritePropertyMultipleRequest(this, address, invokeId, objectId, values, maxSegments);
else
{
// DAL
SendAbort(address, invokeId, BacnetAbortReason.OTHER);
//ErrorResponse(address, service, invokeId, BacnetErrorClasses.ERROR_CLASS_SERVICES, BacnetErrorCodes.ERROR_CODE_ABORT_OTHER);
Log.Warn("Couldn't decode DecodeWritePropertyMultiple");
}
}
else if (service == BacnetConfirmedServices.SERVICE_CONFIRMED_COV_NOTIFICATION && OnCOVNotification != null)
{
if (Services.DecodeCOVNotifyUnconfirmed(address, buffer, offset, length, out var subscriberProcessIdentifier, out var initiatingDeviceIdentifier, out var monitoredObjectIdentifier, out var timeRemaining, out var values) >= 0)
OnCOVNotification(this, address, invokeId, subscriberProcessIdentifier, initiatingDeviceIdentifier, monitoredObjectIdentifier, timeRemaining, true, values, maxSegments);
else
{
// DAL
SendAbort(address, invokeId, BacnetAbortReason.OTHER);
//ErrorResponse(address, service, invokeId, BacnetErrorClasses.ERROR_CLASS_SERVICES, BacnetErrorCodes.ERROR_CODE_ABORT_OTHER);
Log.Warn("Couldn't decode COVNotify");
}
}
else if (service == BacnetConfirmedServices.SERVICE_CONFIRMED_ATOMIC_WRITE_FILE && OnAtomicWriteFileRequest != null)
{
if (Services.DecodeAtomicWriteFile(buffer, offset, length, out var isStream, out var objectId, out var position, out var blockCount, out var blocks, out var counts) >= 0)
OnAtomicWriteFileRequest(this, address, invokeId, isStream, objectId, position, blockCount, blocks, counts, maxSegments);
else
{
// DAL
SendAbort(address, invokeId, BacnetAbortReason.OTHER);
//ErrorResponse(address, service, invokeId, BacnetErrorClasses.ERROR_CLASS_SERVICES, BacnetErrorCodes.ERROR_CODE_ABORT_OTHER);
Log.Warn("Couldn't decode AtomicWriteFile");
}
}
else if (service == BacnetConfirmedServices.SERVICE_CONFIRMED_ATOMIC_READ_FILE && OnAtomicReadFileRequest != null)
{
if (Services.DecodeAtomicReadFile(buffer, offset, length, out var isStream, out var objectId, out var position, out var count) >= 0)
OnAtomicReadFileRequest(this, address, invokeId, isStream, objectId, position, count, maxSegments);
else
{
// DAL
SendAbort(address, invokeId, BacnetAbortReason.OTHER);
//ErrorResponse(address, service, invokeId, BacnetErrorClasses.ERROR_CLASS_SERVICES, BacnetErrorCodes.ERROR_CODE_ABORT_OTHER);
Log.Warn("Couldn't decode AtomicReadFile");
}
}
else if (service == BacnetConfirmedServices.SERVICE_CONFIRMED_SUBSCRIBE_COV && OnSubscribeCOV != null)
{
if (Services.DecodeSubscribeCOV(buffer, offset, length, out var subscriberProcessIdentifier, out var monitoredObjectIdentifier, out var cancellationRequest, out var issueConfirmedNotifications, out var lifetime) >= 0)
OnSubscribeCOV(this, address, invokeId, subscriberProcessIdentifier, monitoredObjectIdentifier, cancellationRequest, issueConfirmedNotifications, lifetime, maxSegments);
else
{
// DAL
SendAbort(address, invokeId, BacnetAbortReason.OTHER);
//ErrorResponse(address, service, invokeId, BacnetErrorClasses.ERROR_CLASS_SERVICES, BacnetErrorCodes.ERROR_CODE_ABORT_OTHER);
Log.Warn("Couldn't decode SubscribeCOV");
}
}
else if (service == BacnetConfirmedServices.SERVICE_CONFIRMED_SUBSCRIBE_COV_PROPERTY && OnSubscribeCOVProperty != null)
{
if (Services.DecodeSubscribeProperty(buffer, offset, length, out var subscriberProcessIdentifier, out var monitoredObjectIdentifier, out var monitoredProperty, out var cancellationRequest, out var issueConfirmedNotifications, out var lifetime, out var covIncrement) >= 0)
OnSubscribeCOVProperty(this, address, invokeId, subscriberProcessIdentifier, monitoredObjectIdentifier, monitoredProperty, cancellationRequest, issueConfirmedNotifications, lifetime, covIncrement, maxSegments);
else
{
// DAL
SendAbort(address, invokeId, BacnetAbortReason.OTHER);
//ErrorResponse(address, service, invokeId, BacnetErrorClasses.ERROR_CLASS_SERVICES, BacnetErrorCodes.ERROR_CODE_ABORT_OTHER);
Log.Warn("Couldn't decode SubscribeCOVProperty");
}
}
else if (service == BacnetConfirmedServices.SERVICE_CONFIRMED_DEVICE_COMMUNICATION_CONTROL && OnDeviceCommunicationControl != null)
{
// DAL
if (Services.DecodeDeviceCommunicationControl(buffer, offset, length, out var timeDuration, out var enableDisable, out var password) >= 0)
OnDeviceCommunicationControl(this, address, invokeId, timeDuration, enableDisable, password, maxSegments);
else
{
// DAL
SendAbort(address, invokeId, BacnetAbortReason.OTHER);
//ErrorResponse(address, service, invokeId, BacnetErrorClasses.ERROR_CLASS_SERVICES, BacnetErrorCodes.ERROR_CODE_ABORT_OTHER);
Log.Warn("Couldn't decode DeviceCommunicationControl");
}
}
else if (service == BacnetConfirmedServices.SERVICE_CONFIRMED_REINITIALIZE_DEVICE && OnReinitializedDevice != null)
{
// DAL
if (Services.DecodeReinitializeDevice(buffer, offset, length, out var state, out var password) >= 0)
OnReinitializedDevice(this, address, invokeId, state, password, maxSegments);
else
{
// DAL
SendAbort(address, invokeId, BacnetAbortReason.OTHER);
//ErrorResponse(address, service, invokeId, BacnetErrorClasses.ERROR_CLASS_SERVICES, BacnetErrorCodes.ERROR_CODE_ABORT_OTHER);
Log.Warn("Couldn't decode ReinitializeDevice");
}
}
else if (service == BacnetConfirmedServices.SERVICE_CONFIRMED_EVENT_NOTIFICATION && OnEventNotify != null) // F. Chaxel
{
if (Services.DecodeEventNotifyData(buffer, offset, length, out var eventData) >= 0)
{
OnEventNotify(this, address, invokeId, eventData, true);
}
else
{
// DAL
SendAbort(address, invokeId, BacnetAbortReason.OTHER);
//ErrorResponse(address, service, invokeId, BacnetErrorClasses.ERROR_CLASS_SERVICES, BacnetErrorCodes.ERROR_CODE_ABORT_OTHER);
Log.Warn("Couldn't decode confirmed Event/Alarm Notification");
}
}
else if (service == BacnetConfirmedServices.SERVICE_CONFIRMED_READ_RANGE && OnReadRange != null)
{
if (Services.DecodeReadRange(buffer, offset, length, out var objectId, out var property, out var requestType, out var position, out var time, out var count) >= 0)
OnReadRange(this, address, invokeId, objectId, property, requestType, position, time, count, maxSegments);
else
{
// DAL
SendAbort(address, invokeId, BacnetAbortReason.OTHER);
//ErrorResponse(address, service, invokeId, BacnetErrorClasses.ERROR_CLASS_SERVICES, BacnetErrorCodes.ERROR_CODE_ABORT_OTHER);
Log.Warn("Couldn't decode ReadRange");
}
}
else if (service == BacnetConfirmedServices.SERVICE_CONFIRMED_CREATE_OBJECT && OnCreateObjectRequest != null)
{
if (Services.DecodeCreateObject(address, buffer, offset, length, out var objectId, out var values) >= 0)
OnCreateObjectRequest(this, address, invokeId, objectId, values, maxSegments);
else
{
// DAL
SendAbort(address, invokeId, BacnetAbortReason.OTHER);
//ErrorResponse(address, service, invokeId, BacnetErrorClasses.ERROR_CLASS_SERVICES, BacnetErrorCodes.ERROR_CODE_ABORT_OTHER);
Log.Warn("Couldn't decode CreateObject");
}
}
else if (service == BacnetConfirmedServices.SERVICE_CONFIRMED_DELETE_OBJECT && OnDeleteObjectRequest != null)
{
if (Services.DecodeDeleteObject(buffer, offset, length, out var objectId) >= 0)
OnDeleteObjectRequest(this, address, invokeId, objectId, maxSegments);
else
{
// DAL
SendAbort(address, invokeId, BacnetAbortReason.OTHER);
//ErrorResponse(address, service, invokeId, BacnetErrorClasses.ERROR_CLASS_SERVICES, BacnetErrorCodes.ERROR_CODE_ABORT_OTHER);
Log.Warn("Couldn't decode DecodeDeleteObject");
}
}
else if (service == BacnetConfirmedServices.SERVICE_CONFIRMED_GET_ALARM_SUMMARY && OnGetAlarmSummaryOrEventInformation != null)
{
// DAL -- added the core code required but since I couldn't test it we just reject this service
// rejecting it shouldn't be too bad a thing since GetAlarmSummary has been retired anyway...
// if someone needs it they can uncomment the related code and test.
#if false
BacnetObjectId objectId = default(BacnetObjectId);
objectId.Type = BacnetObjectTypes.MAX_BACNET_OBJECT_TYPE;
if (Services.DecodeAlarmSummaryOrEventRequest(buffer, offset, length, false, ref objectId) >= 0)
{
OnGetAlarmSummaryOrEventInformation(this, address, invokeId, false, objectId, maxAdpu, maxSegments);
}
else
{
// DAL
SendAbort(address, invokeId, BacnetAbortReason.OTHER);
//ErrorResponse(address, service, invokeId, BacnetErrorClasses.ERROR_CLASS_SERVICES, BacnetErrorCodes.ERROR_CODE_ABORT_OTHER);
Log.Warn("Couldn't decode GetAlarmSummary");
}
#else
SendConfirmedServiceReject(address, invokeId, BacnetRejectReason.RECOGNIZED_SERVICE); // should be unrecognized but this is the way it was spelled..
#endif
}
else if (service == BacnetConfirmedServices.SERVICE_CONFIRMED_GET_EVENT_INFORMATION && OnGetAlarmSummaryOrEventInformation != null)
{
// DAL
BacnetObjectId objectId = default;
objectId.Type = BacnetObjectTypes.MAX_BACNET_OBJECT_TYPE;
if (Services.DecodeAlarmSummaryOrEventRequest(buffer, offset, length, true, ref objectId) >= 0)
{
OnGetAlarmSummaryOrEventInformation(this, address, invokeId, true, objectId, maxAdpu, maxSegments);
}
else
{
// DAL
SendAbort(address, invokeId, BacnetAbortReason.OTHER);
//ErrorResponse(address, service, invokeId, BacnetErrorClasses.ERROR_CLASS_SERVICES, BacnetErrorCodes.ERROR_CODE_ABORT_OTHER);
Log.Warn("Couldn't decode GetEventInformation");
}
}
else if (service == BacnetConfirmedServices.SERVICE_CONFIRMED_ACKNOWLEDGE_ALARM && OnAlarmAcknowledge != null)
{
// DAL
if (Services.DecodeAlarmAcknowledge(buffer, offset, length, out uint ackProcessIdentifier, out BacnetObjectId eventObjectIdentifier, out uint eventStateAcked, out string ackSource, out BacnetGenericTime eventTimeStamp, out BacnetGenericTime ackTimeStamp) >= 0)
{
OnAlarmAcknowledge(this, address, invokeId, ackProcessIdentifier, eventObjectIdentifier, eventStateAcked, ackSource, eventTimeStamp, ackTimeStamp);
}
else
{
// DAL
SendAbort(address, invokeId, BacnetAbortReason.OTHER);
//ErrorResponse(address, service, invokeId, BacnetErrorClasses.ERROR_CLASS_SERVICES, BacnetErrorCodes.ERROR_CODE_ABORT_OTHER);
Log.Warn("Couldn't decode AlarmAcknowledge");
}
}
else
{
// DAL
SendConfirmedServiceReject(address, invokeId, BacnetRejectReason.RECOGNIZED_SERVICE); // should be unrecognized but this is the way it was spelled..
Log.Debug($"Confirmed service not handled: {service}");
}
}
catch (Exception ex)
{
// DAL
SendAbort(address, invokeId, BacnetAbortReason.OTHER);
//ErrorResponse(address, service, invokeId, BacnetErrorClasses.ERROR_CLASS_DEVICE, BacnetErrorCodes.ERROR_CODE_ABORT_OTHER);
Log.Error("Error in ProcessConfirmedServiceRequest", ex);
}
}
public delegate void UnconfirmedServiceRequestHandler(BacnetClient sender, BacnetAddress adr, BacnetPduTypes type, BacnetUnconfirmedServices service, byte[] buffer, int offset, int length);
public event UnconfirmedServiceRequestHandler OnUnconfirmedServiceRequest;
public delegate void WhoHasHandler(BacnetClient sender, BacnetAddress adr, int lowLimit, int highLimit, BacnetObjectId? objId, string objName);
public event WhoHasHandler OnWhoHas;
public delegate void IamHandler(BacnetClient sender, BacnetAddress adr, uint deviceId, uint maxAPDU, BacnetSegmentations segmentation, ushort vendorId);
public event IamHandler OnIam;
public delegate void WhoIsHandler(BacnetClient sender, BacnetAddress adr, int lowLimit, int highLimit);
public event WhoIsHandler OnWhoIs;
public delegate void TimeSynchronizeHandler(BacnetClient sender, BacnetAddress adr, DateTime dateTime, bool utc);
public event TimeSynchronizeHandler OnTimeSynchronize;
//used by both 'confirmed' and 'unconfirmed' notify
public delegate void COVNotificationHandler(BacnetClient sender, BacnetAddress adr, byte invokeId, uint subscriberProcessIdentifier, BacnetObjectId initiatingDeviceIdentifier, BacnetObjectId monitoredObjectIdentifier, uint timeRemaining, bool needConfirm, ICollection<BacnetPropertyValue> values, BacnetMaxSegments maxSegments);
public event COVNotificationHandler OnCOVNotification;
protected void ProcessUnconfirmedServiceRequest(BacnetAddress address, BacnetPduTypes type, BacnetUnconfirmedServices service, byte[] buffer, int offset, int length)
{
try
{
Log.Debug("UnconfirmedServiceRequest");
OnUnconfirmedServiceRequest?.Invoke(this, address, type, service, buffer, offset, length);
if (service == BacnetUnconfirmedServices.SERVICE_UNCONFIRMED_I_AM && OnIam != null)
{
if (Services.DecodeIamBroadcast(buffer, offset, out var deviceId, out var maxAdpu, out var segmentation, out var vendorId) >= 0)
OnIam(this, address, deviceId, maxAdpu, segmentation, vendorId);
else
Log.Warn("Couldn't decode IamBroadcast");
}
else if (service == BacnetUnconfirmedServices.SERVICE_UNCONFIRMED_WHO_IS && OnWhoIs != null)
{
if (Services.DecodeWhoIsBroadcast(buffer, offset, length, out var lowLimit, out var highLimit) >= 0)
OnWhoIs(this, address, lowLimit, highLimit);
else
Log.Warn("Couldn't decode WhoIsBroadcast");
}
// added by thamersalek
else if (service == BacnetUnconfirmedServices.SERVICE_UNCONFIRMED_WHO_HAS && OnWhoHas != null)
{
if (Services.DecodeWhoHasBroadcast(buffer, offset, length, out var lowLimit, out var highLimit, out var objId, out var objName) >= 0)
OnWhoHas(this, address, lowLimit, highLimit, objId, objName);
else
Log.Warn("Couldn't decode WhoHasBroadcast");
}
else if (service == BacnetUnconfirmedServices.SERVICE_UNCONFIRMED_COV_NOTIFICATION && OnCOVNotification != null)
{
if (Services.DecodeCOVNotifyUnconfirmed(address, buffer, offset, length, out var subscriberProcessIdentifier, out var initiatingDeviceIdentifier, out var monitoredObjectIdentifier, out var timeRemaining, out var values) >= 0)
OnCOVNotification(this, address, 0, subscriberProcessIdentifier, initiatingDeviceIdentifier, monitoredObjectIdentifier, timeRemaining, false, values, BacnetMaxSegments.MAX_SEG0);
else
Log.Warn("Couldn't decode COVNotifyUnconfirmed");
}
else if (service == BacnetUnconfirmedServices.SERVICE_UNCONFIRMED_TIME_SYNCHRONIZATION && OnTimeSynchronize != null)
{
if (Services.DecodeTimeSync(buffer, offset, length, out var dateTime) >= 0)
OnTimeSynchronize(this, address, dateTime, false);
else
Log.Warn("Couldn't decode TimeSynchronize");
}
else if (service == BacnetUnconfirmedServices.SERVICE_UNCONFIRMED_UTC_TIME_SYNCHRONIZATION && OnTimeSynchronize != null)
{
if (Services.DecodeTimeSync(buffer, offset, length, out var dateTime) >= 0)
OnTimeSynchronize(this, address, dateTime, true);
else
Log.Warn("Couldn't decode TimeSynchronize");
}
else if (service == BacnetUnconfirmedServices.SERVICE_UNCONFIRMED_EVENT_NOTIFICATION && OnEventNotify != null) // F. Chaxel
{
if (Services.DecodeEventNotifyData(buffer, offset, length, out var eventData) >= 0)
OnEventNotify(this, address, 0, eventData, false);
else
Log.Warn("Couldn't decode unconfirmed Event/Alarm Notification");
}
else
{
Log.Debug($"Unconfirmed service not handled: {service}");
// SendUnConfirmedServiceReject(adr); ? exists ?
}
}
catch (Exception ex)
{
Log.Error("Error in ProcessUnconfirmedServiceRequest", ex);
}
}
public delegate void SimpleAckHandler(BacnetClient sender, BacnetAddress adr, BacnetPduTypes type, BacnetConfirmedServices service, byte invokeId, byte[] data, int dataOffset, int dataLength);
public event SimpleAckHandler OnSimpleAck;
protected void ProcessSimpleAck(BacnetAddress adr, BacnetPduTypes type, BacnetConfirmedServices service, byte invokeId, byte[] buffer, int offset, int length)
{
try
{
Log.Debug($"Received SimpleAck for {service}");
OnSimpleAck?.Invoke(this, adr, type, service, invokeId, buffer, offset, length);
}
catch (Exception ex)
{
Log.Error("Error in ProcessSimpleAck", ex);
}
}
public delegate void ComplexAckHandler(BacnetClient sender, BacnetAddress adr, BacnetPduTypes type, BacnetConfirmedServices service, byte invokeId, byte[] buffer, int offset, int length);
public event ComplexAckHandler OnComplexAck;
protected void ProcessComplexAck(BacnetAddress adr, BacnetPduTypes type, BacnetConfirmedServices service, byte invokeId, byte[] buffer, int offset, int length)
{
try
{
Log.Debug($"Received ComplexAck for {service}");
OnComplexAck?.Invoke(this, adr, type, service, invokeId, buffer, offset, length);
}
catch (Exception ex)
{
Log.Error($"Error in {nameof(ProcessComplexAck)}", ex);
}
}
public delegate void ErrorHandler(BacnetClient sender, BacnetAddress adr, BacnetPduTypes type, BacnetConfirmedServices service, byte invokeId, BacnetErrorClasses errorClass, BacnetErrorCodes errorCode, byte[] buffer, int offset, int length);
public event ErrorHandler OnError;
protected void ProcessError(BacnetAddress adr, BacnetPduTypes type, BacnetConfirmedServices service, byte invokeId, byte[] buffer, int offset, int length)
{
try
{
if (Services.DecodeError(buffer, offset, length, out var errorClass, out var errorCode) < 0)
Log.Warn("Couldn't decode received Error");
Log.Debug($"Received Error {errorClass} {errorCode}");
OnError?.Invoke(this, adr, type, service, invokeId, errorClass, errorCode, buffer, offset, length);
}
catch (Exception ex)
{
Log.Error($"Error in {nameof(ProcessError)}", ex);
}
}
public delegate void AbortHandler(BacnetClient sender, BacnetAddress adr, BacnetPduTypes type, byte invokeId, BacnetAbortReason reason, byte[] buffer, int offset, int length);
public event AbortHandler OnAbort;
protected void ProcessAbort(BacnetAddress adr, BacnetPduTypes type, byte invokeId, BacnetAbortReason reason, byte[] buffer, int offset, int length)
{
try
{
Log.Debug($"Received Abort, reason: {reason}");
OnAbort?.Invoke(this, adr, type, invokeId, reason, buffer, offset, length);
}
catch (Exception ex)
{
Log.Error("Error in ProcessAbort", ex);
}
}
public delegate void RejectHandler(BacnetClient sender, BacnetAddress adr, BacnetPduTypes type, byte invokeId, BacnetRejectReason reason, byte[] buffer, int offset, int length);
public event RejectHandler OnReject;
protected void ProcessReject(BacnetAddress adr, BacnetPduTypes type, byte invokeId, BacnetRejectReason reason, byte[] buffer, int offset, int length)
{
try
{
Log.Debug($"Received Reject, reason: {reason}");
OnReject?.Invoke(this, adr, type, invokeId, reason, buffer, offset, length);
}
catch (Exception ex)
{
Log.Error("Error in ProcessReject", ex);
}
}
public delegate void SegmentAckHandler(BacnetClient sender, BacnetAddress adr, BacnetPduTypes type, byte originalInvokeId, byte sequenceNumber, byte actualWindowSize, byte[] buffer, int offset, int length);
public event SegmentAckHandler OnSegmentAck;
protected void ProcessSegmentAck(BacnetAddress adr, BacnetPduTypes type, byte originalInvokeId, byte sequenceNumber, byte actualWindowSize, byte[] buffer, int offset, int length)
{
try
{
Log.Debug("Received SegmentAck");
OnSegmentAck?.Invoke(this, adr, type, originalInvokeId, sequenceNumber, actualWindowSize, buffer, offset, length);
}
catch (Exception ex)
{
Log.Error("Error in ProcessSegmentAck", ex);
}
}
public delegate void SegmentHandler(BacnetClient sender, BacnetAddress adr, BacnetPduTypes type, BacnetConfirmedServices service, byte invokeId, BacnetMaxSegments maxSegments, BacnetMaxAdpu maxAdpu, byte sequenceNumber, byte[] buffer, int offset, int length);
public event SegmentHandler OnSegment;
private void ProcessSegment(BacnetAddress address, BacnetPduTypes type, BacnetConfirmedServices service, byte invokeId, BacnetMaxSegments maxSegments, BacnetMaxAdpu maxAdpu, bool server, byte sequenceNumber, byte proposedWindowNumber, byte[] buffer, int offset, int length)
{
lock (_locksPerInvokeId.GetOrAdd(invokeId, () => new object()))
{
ProcessSegmentLocked(address, type, service, invokeId, maxSegments, maxAdpu, server, sequenceNumber,
proposedWindowNumber, buffer, offset, length);
}
}
private void ProcessSegmentLocked(BacnetAddress adr, BacnetPduTypes type, BacnetConfirmedServices service,
byte invokeId, BacnetMaxSegments maxSegments, BacnetMaxAdpu maxAdpu, bool server, byte sequenceNumber,
byte proposedWindowNumber, byte[] buffer, int offset, int length)
{
Log.Trace($@"Processing Segment #{sequenceNumber} of invoke-id #{invokeId}");
if (!_segmentsPerInvokeId.ContainsKey(invokeId))
_segmentsPerInvokeId[invokeId] = new List<Tuple<byte, byte[]>>();
if (!_expectedSegmentsPerInvokeId.ContainsKey(invokeId))
_expectedSegmentsPerInvokeId[invokeId] = byte.MaxValue;
var moreFollows = (type & BacnetPduTypes.MORE_FOLLOWS) == BacnetPduTypes.MORE_FOLLOWS;
if (!moreFollows)
_expectedSegmentsPerInvokeId[invokeId] = (byte)(sequenceNumber + 1);
//send ACK
if (sequenceNumber % proposedWindowNumber == 0 || !moreFollows)
{
if (ForceWindowSize)
proposedWindowNumber = ProposedWindowSize;
SegmentAckResponse(adr, false, server, invokeId, sequenceNumber, proposedWindowNumber);
}
//Send on
OnSegment?.Invoke(this, adr, type, service, invokeId, maxSegments, maxAdpu, sequenceNumber, buffer, offset, length);
//default segment assembly. We run this seperately from the above handler, to make sure that it comes after!
if (DefaultSegmentationHandling)
PerformDefaultSegmentHandling(adr, type, service, invokeId, maxSegments, maxAdpu, sequenceNumber, buffer, offset, length);
}
/// <summary>
/// This is a simple handling that stores all segments in memory and assembles them when done
/// </summary>
private void PerformDefaultSegmentHandling(BacnetAddress adr, BacnetPduTypes type, BacnetConfirmedServices service, byte invokeId, BacnetMaxSegments maxSegments, BacnetMaxAdpu maxAdpu, byte sequenceNumber, byte[] buffer, int offset, int length)
{
var segments = _segmentsPerInvokeId[invokeId];
if (sequenceNumber == 0)
{
//copy buffer + encode new adpu header
type &= ~BacnetPduTypes.SEGMENTED_MESSAGE;
var confirmedServiceRequest = (type & BacnetPduTypes.PDU_TYPE_MASK) == BacnetPduTypes.PDU_TYPE_CONFIRMED_SERVICE_REQUEST;
var adpuHeaderLen = confirmedServiceRequest ? 4 : 3;
var copy = new byte[length + adpuHeaderLen];
Array.Copy(buffer, offset, copy, adpuHeaderLen, length);
var encodedBuffer = new EncodeBuffer(copy, 0);
if (confirmedServiceRequest)
APDU.EncodeConfirmedServiceRequest(encodedBuffer, type, service, maxSegments, maxAdpu, invokeId);
else
APDU.EncodeComplexAck(encodedBuffer, type, service, invokeId);
segments.Add(Tuple.Create(sequenceNumber, copy)); // doesn't include BVLC or NPDU
}
else
{
//copy only content part
segments.Add(Tuple.Create(sequenceNumber, buffer.Skip(offset).Take(length).ToArray()));
}
//process when finished
if (segments.Count < _expectedSegmentsPerInvokeId[invokeId])
return;
//assemble whole part
var apduBuffer = segments.OrderBy(s => s.Item1).SelectMany(s => s.Item2).ToArray();
segments.Clear();
_expectedSegmentsPerInvokeId[invokeId] = byte.MaxValue;
//process
ProcessApdu(adr, type, apduBuffer, 0, apduBuffer.Length);
}
private void ProcessApdu(BacnetAddress adr, BacnetPduTypes type, byte[] buffer, int offset, int length)
{
switch (type & BacnetPduTypes.PDU_TYPE_MASK)
{
case BacnetPduTypes.PDU_TYPE_UNCONFIRMED_SERVICE_REQUEST:
{
var apduHeaderLen = APDU.DecodeUnconfirmedServiceRequest(buffer, offset, out type, out var service);
offset += apduHeaderLen;
length -= apduHeaderLen;
ProcessUnconfirmedServiceRequest(adr, type, service, buffer, offset, length);
}
break;
case BacnetPduTypes.PDU_TYPE_SIMPLE_ACK:
{
var apduHeaderLen = APDU.DecodeSimpleAck(buffer, offset, out type, out var service, out var invokeId);
offset += apduHeaderLen;
length -= apduHeaderLen;
ProcessSimpleAck(adr, type, service, invokeId, buffer, offset, length);
}
break;
case BacnetPduTypes.PDU_TYPE_COMPLEX_ACK:
{
var apduHeaderLen = APDU.DecodeComplexAck(buffer, offset, out type, out var service, out var invokeId,
out var sequenceNumber, out var proposedWindowNumber);
offset += apduHeaderLen;
length -= apduHeaderLen;
if ((type & BacnetPduTypes.SEGMENTED_MESSAGE) == 0) //don't process segmented messages here
{
ProcessComplexAck(adr, type, service, invokeId, buffer, offset, length);
}
else
{
ProcessSegment(adr, type, service, invokeId, BacnetMaxSegments.MAX_SEG0, BacnetMaxAdpu.MAX_APDU50, false,
sequenceNumber, proposedWindowNumber, buffer, offset, length);
}
}
break;
case BacnetPduTypes.PDU_TYPE_SEGMENT_ACK:
{
var apduHeaderLen = APDU.DecodeSegmentAck(buffer, offset, out type, out var originalInvokeId,
out var sequenceNumber, out var actualWindowSize);
offset += apduHeaderLen;
length -= apduHeaderLen;
_lastSegmentAck.Set(adr, originalInvokeId, sequenceNumber, actualWindowSize);
ProcessSegmentAck(adr, type, originalInvokeId, sequenceNumber, actualWindowSize, buffer, offset, length);
}
break;
case BacnetPduTypes.PDU_TYPE_ERROR:
{
var apduHeaderLen = APDU.DecodeError(buffer, offset, out type, out var service, out var invokeId);
offset += apduHeaderLen;
length -= apduHeaderLen;
ProcessError(adr, type, service, invokeId, buffer, offset, length);
}
break;
case BacnetPduTypes.PDU_TYPE_ABORT:
{
var apduHeaderLen = APDU.DecodeAbort(buffer, offset, out type, out var invokeId, out var reason);
offset += apduHeaderLen;
length -= apduHeaderLen;
ProcessAbort(adr, type, invokeId, reason, buffer, offset, length);
}
break;
case BacnetPduTypes.PDU_TYPE_REJECT:
{
var apduHeaderLen = APDU.DecodeReject(buffer, offset, out type, out var invokeId, out var reason);
offset += apduHeaderLen;
length -= apduHeaderLen;
ProcessReject(adr, type, invokeId, reason, buffer, offset, length);
}
break;
case BacnetPduTypes.PDU_TYPE_CONFIRMED_SERVICE_REQUEST:
{
var apduHeaderLen = APDU.DecodeConfirmedServiceRequest(buffer, offset, out type, out var service,
out var maxSegments, out var maxAdpu, out var invokeId, out var sequenceNumber, out var proposedWindowNumber);
offset += apduHeaderLen;
length -= apduHeaderLen;
if ((type & BacnetPduTypes.SEGMENTED_MESSAGE) == 0) //don't process segmented messages here
{
ProcessConfirmedServiceRequest(adr, type, service, maxSegments, maxAdpu, invokeId, buffer, offset, length);
}
else
{
ProcessSegment(adr, type, service, invokeId, maxSegments, maxAdpu, true, sequenceNumber, proposedWindowNumber, buffer, offset, length);
}
}
break;
default:
Log.Warn($"Something else arrived: {type}");
break;
}
}
// DAL
public void SendNetworkMessage(BacnetAddress adr, byte[] buffer, int bufLen, BacnetNetworkMessageTypes messageType, ushort vendorId = 0)
{
if (adr == null)
{
adr = Transport.GetBroadcastAddress();
}
var b = GetEncodeBuffer(Transport.HeaderLength);
NPDU.Encode(b, BacnetNpduControls.NetworkLayerMessage, adr, null, 255, messageType, vendorId);
b.Add(buffer, bufLen);
Transport.Send(b.buffer, Transport.HeaderLength, b.offset - Transport.HeaderLength, adr, false, 0);
}
public void SendIAmRouterToNetwork(ushort[] networks)
{
var b = GetEncodeBuffer(0);
for (int i = 0; i < networks.Length; i++)
{
ASN1.encode_unsigned16(b, networks[i]);
}
SendNetworkMessage(null, b.buffer, b.offset, BacnetNetworkMessageTypes.NETWORK_MESSAGE_I_AM_ROUTER_TO_NETWORK);
}
public void SendInitializeRoutingTableAck(BacnetAddress adr, ushort[] networks)
{
var b = GetEncodeBuffer(0);
if (networks != null)
{
for (int i = 0; i < networks.Length; i++)
{
ASN1.encode_unsigned16(b, networks[i]);
}
}
SendNetworkMessage(adr, b.buffer, b.offset, BacnetNetworkMessageTypes.NETWORK_MESSAGE_INIT_RT_TABLE_ACK);
}
public void SendRejectToNetwork(BacnetAddress adr, ushort[] networks)
{
var b = GetEncodeBuffer(0);
/* Sending our DNET doesn't make a lot of sense, does it? */
for (int i = 0; i < networks.Length; i++)
{
ASN1.encode_unsigned16(b, networks[i]);
}
SendNetworkMessage(adr, b.buffer, b.offset, BacnetNetworkMessageTypes.NETWORK_MESSAGE_REJECT_MESSAGE_TO_NETWORK);
}
public delegate void NetworkMessageHandler(BacnetClient sender, BacnetAddress adr, BacnetNpduControls npduFunction, BacnetNetworkMessageTypes npduMessageType, byte[] buffer, int offset, int messageLength);
public event NetworkMessageHandler OnNetworkMessage;
public delegate void WhoIsRouterToNetworkHandler(BacnetClient sender, BacnetAddress adr, BacnetNpduControls npduFunction, byte[] buffer, int offset, int messageLength);
public event WhoIsRouterToNetworkHandler OnWhoIsRouterToNetworkMessage;
public delegate void IAmRouterToNetworkHandler(BacnetClient sender, BacnetAddress adr, BacnetNpduControls npduFunction, byte[] buffer, int offset, int messageLength);
public event IAmRouterToNetworkHandler OnIAmRouterToNetworkMessage;
public delegate void ICouldBeRouterToNetworkHandler(BacnetClient sender, BacnetAddress adr, BacnetNpduControls npduFunction, byte[] buffer, int offset, int messageLength);
public event ICouldBeRouterToNetworkHandler OnICouldBeRouterToNetworkMessage;
public delegate void RejectMessageToNetworkHandler(BacnetClient sender, BacnetAddress adr, BacnetNpduControls npduFunction, byte[] buffer, int offset, int messageLength);
public event RejectMessageToNetworkHandler OnRejectMessageToNetworkMessage;
public delegate void RouterBusyToNetworkHandler(BacnetClient sender, BacnetAddress adr, BacnetNpduControls npduFunction, byte[] buffer, int offset, int messageLength);
public event RouterBusyToNetworkHandler OnRouterBusyToNetworkMessage;
public delegate void RouterAvailableToNetworkHandler(BacnetClient sender, BacnetAddress adr, BacnetNpduControls npduFunction, byte[] buffer, int offset, int messageLength);
public event RouterAvailableToNetworkHandler OnRouterAvailableToNetworkMessage;
public delegate void InitRtTableToNetworkHandler(BacnetClient sender, BacnetAddress adr, BacnetNpduControls npduFunction, byte[] buffer, int offset, int messageLength);
public event InitRtTableToNetworkHandler OnInitRtTableToNetworkMessage;
public delegate void InitRtTableAckToNetworkHandler(BacnetClient sender, BacnetAddress adr, BacnetNpduControls npduFunction, byte[] buffer, int offset, int messageLength);
public event InitRtTableAckToNetworkHandler OnInitRtTableAckToNetworkMessage;
public delegate void EstablishConnectionToNetworkHandler(BacnetClient sender, BacnetAddress adr, BacnetNpduControls npduFunction, byte[] buffer, int offset, int messageLength);
public event EstablishConnectionToNetworkHandler OnEstablishConnectionToNetworkMessage;
public delegate void DisconnectConnectionToNetworkHandler(BacnetClient sender, BacnetAddress adr, BacnetNpduControls npduFunction, byte[] buffer, int offset, int messageLength);
public event DisconnectConnectionToNetworkHandler OnDisconnectConnectionToNetworkMessage;
public delegate void UnrecognizedNetworkHandler(BacnetClient sender, BacnetAddress adr, BacnetNpduControls npduFunction, byte[] buffer, int offset, int messageLength);
public event UnrecognizedNetworkHandler OnUnrecognizedNetworkMessage;
private void ProcessNetworkMessage(BacnetAddress adr, BacnetNpduControls npduFunction, BacnetNetworkMessageTypes npduMessageType, byte[] buffer, int offset, int messageLength)
{
// DAL I don't want to make a generic router, but I do want to put in enough infrastructure
// that I can build on it to route multiple devices in the normal bacnet way.
OnNetworkMessage?.Invoke(this, adr, npduFunction, npduMessageType, buffer, offset, messageLength);
switch (npduMessageType)
{
case BacnetNetworkMessageTypes.NETWORK_MESSAGE_WHO_IS_ROUTER_TO_NETWORK:
OnWhoIsRouterToNetworkMessage?.Invoke(this, adr, npduFunction, buffer, offset, messageLength);
break;
case BacnetNetworkMessageTypes.NETWORK_MESSAGE_I_AM_ROUTER_TO_NETWORK:
OnIAmRouterToNetworkMessage?.Invoke(this, adr, npduFunction, buffer, offset, messageLength);
break;
case BacnetNetworkMessageTypes.NETWORK_MESSAGE_I_COULD_BE_ROUTER_TO_NETWORK:
OnICouldBeRouterToNetworkMessage?.Invoke(this, adr, npduFunction, buffer, offset, messageLength);
break;
case BacnetNetworkMessageTypes.NETWORK_MESSAGE_REJECT_MESSAGE_TO_NETWORK:
OnRejectMessageToNetworkMessage?.Invoke(this, adr, npduFunction, buffer, offset, messageLength);
break;
case BacnetNetworkMessageTypes.NETWORK_MESSAGE_ROUTER_BUSY_TO_NETWORK:
OnRouterBusyToNetworkMessage?.Invoke(this, adr, npduFunction, buffer, offset, messageLength);
break;
case BacnetNetworkMessageTypes.NETWORK_MESSAGE_ROUTER_AVAILABLE_TO_NETWORK:
OnRouterAvailableToNetworkMessage?.Invoke(this, adr, npduFunction, buffer, offset, messageLength);
break;
case BacnetNetworkMessageTypes.NETWORK_MESSAGE_INIT_RT_TABLE:
OnInitRtTableToNetworkMessage?.Invoke(this, adr, npduFunction, buffer, offset, messageLength);
break;
case BacnetNetworkMessageTypes.NETWORK_MESSAGE_INIT_RT_TABLE_ACK:
OnInitRtTableAckToNetworkMessage?.Invoke(this, adr, npduFunction, buffer, offset, messageLength);
break;
case BacnetNetworkMessageTypes.NETWORK_MESSAGE_ESTABLISH_CONNECTION_TO_NETWORK:
OnEstablishConnectionToNetworkMessage?.Invoke(this, adr, npduFunction, buffer, offset, messageLength);
break;
case BacnetNetworkMessageTypes.NETWORK_MESSAGE_DISCONNECT_CONNECTION_TO_NETWORK:
OnDisconnectConnectionToNetworkMessage?.Invoke(this, adr, npduFunction, buffer, offset, messageLength);
break;
default:
/* An unrecognized message is bad; send an error response. */
OnUnrecognizedNetworkMessage?.Invoke(this, adr, npduFunction, buffer, offset, messageLength);
break;
}
}
private void OnRecieve(IBacnetTransport sender, byte[] buffer, int offset, int msgLength, BacnetAddress remoteAddress)
{
try
{
if (Transport == null)
return; //we're disposed
if (msgLength <= 0)
return;
// parse
var npduLen = NPDU.Decode(buffer, offset, out var npduFunction, out var destination, out var source, out _, out var npduMessageType, out _);
// Modif FC
remoteAddress.RoutedSource = source;
// DAL