public static ResponseType ProcessCEMI(ref KnxDatagram datagram, byte[] cemi, bool threeLevelGroupAddressing, bool isDebug)
{
try
{
// CEMI
// +--------+--------+--------+--------+----------------+----------------+--------+----------------+
// | Msg |Add.Info| Ctrl 1 | Ctrl 2 | Source Address | Dest. Address | Data | APDU |
// | Code | Length | | | | | Length | |
// +--------+--------+--------+--------+----------------+----------------+--------+----------------+
// 1 byte 1 byte 1 byte 1 byte 2 bytes 2 bytes 1 byte 2 bytes
//
// Message Code = 0x11 - a L_Data.req primitive
// COMMON EMI MESSAGE CODES FOR DATA LINK LAYER PRIMITIVES
// FROM NETWORK LAYER TO DATA LINK LAYER
// +---------------------------+--------------+-------------------------+---------------------+------------------+
// | Data Link Layer Primitive | Message Code | Data Link Layer Service | Service Description | Common EMI Frame |
// +---------------------------+--------------+-------------------------+---------------------+------------------+
// | L_Raw.req | 0x10 | | | |
// +---------------------------+--------------+-------------------------+---------------------+------------------+
// | | | | Primitive used for | Sample Common |
// | L_Data.req | 0x11 | Data Service | transmitting a data | EMI frame |
// | | | | frame | |
// +---------------------------+--------------+-------------------------+---------------------+------------------+
// | L_Poll_Data.req | 0x13 | Poll Data Service | | |
// +---------------------------+--------------+-------------------------+---------------------+------------------+
// | L_Raw.req | 0x10 | | | |
// +---------------------------+--------------+-------------------------+---------------------+------------------+
// FROM DATA LINK LAYER TO NETWORK LAYER
// +---------------------------+--------------+-------------------------+---------------------+
// | Data Link Layer Primitive | Message Code | Data Link Layer Service | Service Description |
// +---------------------------+--------------+-------------------------+---------------------+
// | L_Poll_Data.con | 0x25 | Poll Data Service | |
// +---------------------------+--------------+-------------------------+---------------------+
// | | | | Primitive used for |
// | L_Data.ind | 0x29 | Data Service | receiving a data |
// | | | | frame |
// +---------------------------+--------------+-------------------------+---------------------+
// | L_Busmon.ind | 0x2B | Bus Monitor Service | |
// +---------------------------+--------------+-------------------------+---------------------+
// | L_Raw.ind | 0x2D | | |
// +---------------------------+--------------+-------------------------+---------------------+
// | | | | Primitive used for |
// | | | | local confirmation |
// | L_Data.con | 0x2E | Data Service | that a frame was |
// | | | | sent (does not mean |
// | | | | successful receive) |
// +---------------------------+--------------+-------------------------+---------------------+
// | L_Raw.con | 0x2F | | |
// +---------------------------+--------------+-------------------------+---------------------+
// Add.Info Length = 0x00 - no additional info
// Control Field 1 = see the bit structure above
// Control Field 2 = see the bit structure above
// Source Address = 0x0000 - filled in by router/gateway with its source address which is
// part of the KNX subnet
// Dest. Address = KNX group or individual address (2 byte)
// Data Length = Number of bytes of data in the APDU excluding the TPCI/APCI bits
// APDU = Application Protocol Data Unit - the actual payload including transport
// protocol control information (TPCI), application protocol control
// information (APCI) and data passed as an argument from higher layers of
// the KNX communication stack
//
datagram.MessageCode = cemi[0];
datagram.AdditionalInfoLength = cemi[1];
if (datagram.AdditionalInfoLength > 0)
{
datagram.AdditionalInfo = new byte[datagram.AdditionalInfoLength];
for (var i = 0; i < datagram.AdditionalInfoLength; i++)
{
datagram.AdditionalInfo[i] = cemi[2 + i];
}
}
datagram.ControlField1 = cemi[2 + datagram.AdditionalInfoLength];
datagram.ControlField2 = cemi[3 + datagram.AdditionalInfoLength];
datagram.SourceAddress = Networking.GetIndividualAddress(new[] { cemi[4 + datagram.AdditionalInfoLength], cemi[5 + datagram.AdditionalInfoLength] });
datagram.DestinationAddress =
Networking.GetKnxDestinationAddressType(datagram.ControlField2).Equals(KnxDestinationAddressType.Individual)
? Networking.GetIndividualAddress(new[] { cemi[6 + datagram.AdditionalInfoLength], cemi[7 + datagram.AdditionalInfoLength] })
: Networking.GetGroupAddress(new[] { cemi[6 + datagram.AdditionalInfoLength], cemi[7 + datagram.AdditionalInfoLength] }, threeLevelGroupAddressing);
datagram.DataLength = cemi[8 + datagram.AdditionalInfoLength];
datagram.Apdu = new byte[datagram.DataLength + 1];
for (var i = 0; i < datagram.Apdu.Length; i++)
{
datagram.Apdu[i] = cemi[9 + i + datagram.AdditionalInfoLength];
}
datagram.Data = DataProcessing.GetData(datagram.DataLength, datagram.Apdu);
if (isDebug)
{
System.Diagnostics.Debug.WriteLine("-----------------------------------------------------------------------------------------------------");
System.Diagnostics.Debug.WriteLine(BitConverter.ToString(cemi));
System.Diagnostics.Debug.WriteLine("Event Header Length: " + datagram.HeaderLength);
System.Diagnostics.Debug.WriteLine("Event Protocol Version: " + datagram.ProtocolVersion.ToString("x"));
System.Diagnostics.Debug.WriteLine("Event Service Type: 0x" + BitConverter.ToString(datagram.ServiceType).Replace("-", string.Empty));
System.Diagnostics.Debug.WriteLine("Event Total Length: " + datagram.TotalLength);
System.Diagnostics.Debug.WriteLine("Event Message Code: " + datagram.MessageCode.ToString("x"));
System.Diagnostics.Debug.WriteLine("Event Aditional Info Length: " + datagram.AdditionalInfoLength);
if (datagram.AdditionalInfoLength > 0)
{
System.Diagnostics.Debug.WriteLine("Event Aditional Info: 0x" + BitConverter.ToString(datagram.AdditionalInfo).Replace("-", string.Empty));
}
System.Diagnostics.Debug.WriteLine("Event Control Field 1: " + Convert.ToString(datagram.ControlField1, 2));
System.Diagnostics.Debug.WriteLine("Event Control Field 2: " + Convert.ToString(datagram.ControlField2, 2));
System.Diagnostics.Debug.WriteLine("Event Source Address: " + datagram.SourceAddress);
System.Diagnostics.Debug.WriteLine("Event Destination Address: " + datagram.DestinationAddress);
System.Diagnostics.Debug.WriteLine("Event Data Length: " + datagram.DataLength);
System.Diagnostics.Debug.WriteLine("Event APDU: 0x" + BitConverter.ToString(datagram.Apdu).Replace("-", string.Empty));
System.Diagnostics.Debug.WriteLine("Event Data: " + datagram.Data);
System.Diagnostics.Debug.WriteLine("-----------------------------------------------------------------------------------------------------");
}
if (datagram.MessageCode != 0x29)
{
return(ResponseType.Other);
}
var type = datagram.Apdu[1] >> 4;
switch (type)
{
case 8:
return(ResponseType.Event);
case 4:
return(ResponseType.Status);
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
}
return(ResponseType.Other);
}
public static byte[] CreateActionDatagramCommon(string destinationAddress, byte[] data, byte[] header, byte actionMessageCode)
{
int i;
var dataLength = DataProcessing.GetDataLength(data);
// HEADER
var datagram = new byte[dataLength + 10 + header.Length];
for (i = 0; i < header.Length; i++)
{
datagram[i] = header[i];
}
// CEMI (start at position 6)
// +--------+--------+--------+--------+----------------+----------------+--------+----------------+
// | Msg |Add.Info| Ctrl 1 | Ctrl 2 | Source Address | Dest. Address | Data | APDU |
// | Code | Length | | | | | Length | |
// +--------+--------+--------+--------+----------------+----------------+--------+----------------+
// 1 byte 1 byte 1 byte 1 byte 2 bytes 2 bytes 1 byte 2 bytes
//
// Message Code = 0x11 - a L_Data.req primitive
// COMMON EMI MESSAGE CODES FOR DATA LINK LAYER PRIMITIVES
// FROM NETWORK LAYER TO DATA LINK LAYER
// +---------------------------+--------------+-------------------------+---------------------+------------------+
// | Data Link Layer Primitive | Message Code | Data Link Layer Service | Service Description | Common EMI Frame |
// +---------------------------+--------------+-------------------------+---------------------+------------------+
// | L_Raw.req | 0x10 | | | |
// +---------------------------+--------------+-------------------------+---------------------+------------------+
// | | | | Primitive used for | Sample Common |
// | L_Data.req | 0x11 | Data Service | transmitting a data | EMI frame |
// | | | | frame | |
// +---------------------------+--------------+-------------------------+---------------------+------------------+
// | L_Poll_Data.req | 0x13 | Poll Data Service | | |
// +---------------------------+--------------+-------------------------+---------------------+------------------+
// | L_Raw.req | 0x10 | | | |
// +---------------------------+--------------+-------------------------+---------------------+------------------+
// FROM DATA LINK LAYER TO NETWORK LAYER
// +---------------------------+--------------+-------------------------+---------------------+
// | Data Link Layer Primitive | Message Code | Data Link Layer Service | Service Description |
// +---------------------------+--------------+-------------------------+---------------------+
// | L_Poll_Data.con | 0x25 | Poll Data Service | |
// +---------------------------+--------------+-------------------------+---------------------+
// | | | | Primitive used for |
// | L_Data.ind | 0x29 | Data Service | receiving a data |
// | | | | frame |
// +---------------------------+--------------+-------------------------+---------------------+
// | L_Busmon.ind | 0x2B | Bus Monitor Service | |
// +---------------------------+--------------+-------------------------+---------------------+
// | L_Raw.ind | 0x2D | | |
// +---------------------------+--------------+-------------------------+---------------------+
// | | | | Primitive used for |
// | | | | local confirmation |
// | L_Data.con | 0x2E | Data Service | that a frame was |
// | | | | sent (does not mean |
// | | | | successful receive) |
// +---------------------------+--------------+-------------------------+---------------------+
// | L_Raw.con | 0x2F | | |
// +---------------------------+--------------+-------------------------+---------------------+
// Add.Info Length = 0x00 - no additional info
// Control Field 1 = see the bit structure above
// Control Field 2 = see the bit structure above
// Source Address = 0x0000 - filled in by router/gateway with its source address which is
// part of the KNX subnet
// Dest. Address = KNX group or individual address (2 byte)
// Data Length = Number of bytes of data in the APDU excluding the TPCI/APCI bits
// APDU = Application Protocol Data Unit - the actual payload including transport
// protocol control information (TPCI), application protocol control
// information (APCI) and data passed as an argument from higher layers of
// the KNX communication stack
//
datagram[i++] =
actionMessageCode != 0x00
? actionMessageCode
: (byte)0x11;
datagram[i++] = 0x00;
datagram[i++] = 0xAC;
datagram[i++] =
Networking.IsAddressIndividual(destinationAddress)
? (byte)0x50
: (byte)0xF0;
datagram[i++] = 0x00;
datagram[i++] = 0x00;
var dst_address = Networking.GetAddress(destinationAddress);
datagram[i++] = dst_address[0];
datagram[i++] = dst_address[1];
datagram[i++] = (byte)dataLength;
datagram[i++] = 0x00;
datagram[i] = 0x80;
DataProcessing.WriteData(datagram, data, i);
return(datagram);
}