public bool Decode(byte[] buf, ref int iptr)
{
networkNumber = BACnetUtil.ExtractUInt16(buf, ref iptr);
portID = buf[iptr++];
portInfoLen = buf[iptr++];
if (portInfoLen != 0)
{
// we are not ready to handle this.
throw new Exception("m0154-Cannot deal with portInfoLen > 0");
}
iptr += (int)portInfoLen;
return(true);
}
public void Decode(byte[] buffer, ref int pos)
{
networkNumber = BACnetUtil.ExtractUInt16(buffer, ref pos);
if (networkNumber == 0)
{
throw new Exception("m0205-Illegal network number of 0 in decode");
}
switch (buffer[pos++])
{
case 0:
// indicates a remote, or possibly a global, broadcast, perfectly legal.
isBroadcast = true;
isLocalBroadcast = false;
if (networkNumber != 0xffff)
{
isRemoteBroadcast = true;
}
else
{
// a remote b'cast with a dest network number is a global broadcast
isRemoteBroadcast = false;
}
break;
case 1:
MACaddress = new BACnetMACaddress(buffer[pos++]);
//MACaddress.length = buffer[pos++];
//MACaddress.uintMACaddress = buffer[pos++];
break;
case 6:
// extract the IP address
myIPEndPoint ipep = new myIPEndPoint();
ipep.Decode(buffer, ref pos);
MACaddress = new BACnetMACaddress(ipep);
//MACaddress.ipMACaddress = ipep;
// pos += 6;
break;
default:
throw new Exception("m0178-Illegal MAC address length??");
//break;
}
}
public virtual void Decode(byte[] buffer, ref int pos, bool tolerate0NN)
{
networkNumber = BACnetUtil.ExtractUInt16(buffer, ref pos);
if (!tolerate0NN && networkNumber == 0)
{
throw new Exception("m0161-Illegal network number of 0 in decode");
// So there is at least one router out there that includes a 0 in the NN part of the SADR when sending a who-is-router. This is benign, because routers
// broadcast their i-am routers. In any event FOR NOW, tolerate this transgression or else comms will not happen on these networks.
// but we do need to find a cleaner way of dealing with this!!
}
switch (buffer[pos++])
{
case 0:
// illegal for sadr
throw new Exception("m0506-MAC length of 0 illegal for SADR");
// break;
case 1:
MACaddress = new BACnetMACaddress(buffer[pos++]);
break;
case 6:
// extract the IP address
myIPEndPoint ipep = new myIPEndPoint();
ipep.Decode(buffer, ref pos);
MACaddress = new BACnetMACaddress(ipep);
//MACaddress.ipMACaddress = ipep;
break;
default:
throw new Exception("m0178-Illegal MAC address length??");
}
}
public void Encode(byte[] buffer, ref int pos)
{
BACnetUtil.EncodeContextTag(buffer, ref pos, 0, (int)(((UInt32)objectType << 22) | objectInstance), 4);
}
public void EncodeApplicationTag(byte[] buffer, ref int pos)
{
UInt32 objid = ((UInt32)objectType << 22) | (objectInstance & 0x3ffffff);
BACnetUtil.InsertApplicationTag(buffer, ref pos, BACnetEnums.BACNET_APPLICATION_TAG.BACNET_APPLICATION_TAG_OBJECT_ID, objid);
}
// the better method is to populate the pkt structure, then call encode...
public static void ReadPropertyObjectList_deprecated(BACnetManager bnm, Device device)
{
byte[] data = new byte[1024];
int optr = 0;
// BVLC Part
// http://www.bacnetwiki.com/wiki/index.php?title=BACnet_Virtual_Link_Control
data[optr++] = BACnetEnums.BACNET_BVLC_TYPE_BIP; // 81
data[optr++] = (byte)BACnetEnums.BACNET_BVLC_FUNCTION.BVLC_ORIGINAL_UNICAST_NPDU; //0a
int store_length_here = optr;
optr += 2;
// Start of NPDU
// http://www.bacnetwiki.com/wiki/index.php?title=NPDU
data[optr++] = 0x01; // Version
data[optr++] = 0x24; // NCPI - Dest present, expecting reply
if (device.adr != null)
{
device.adr.Encode(data, ref optr);
}
else
{
// this means we have an ethernet/IP address for a MAC address. At present
// we then dont know the network number
// todo - resolve the network number issue
ADR tempAdr = new ADR(0, device.directlyConnectedIPEndPointOfDevice);
tempAdr.Encode(data, ref optr);
}
data[optr++] = 0xff; // Hopcount
// APDU start
// http://www.bacnetwiki.com/wiki/index.php?title=APDU
// Unconfirmed Request
// Structure described here http://www.bacnetwiki.com/wiki/index.php?title=BACnet-Confirmed-Request-PDU
data[optr++] = 0x02; // PDU Type=0 and SA=1
data[optr++] = 0x04; // Max Resp (Encoded)
data[optr++] = 0x01; // Invoke ID
data[optr++] = 0x0c; // Service Choice 12 = ReadProperty
// Service Request
// Object type, instance (Device Object)
device.deviceObjectID.Encode(data, ref optr);
// Property Identifier (Object List)
data[optr++] = 0x19; // 19 Context Tag: 1, Length/Value/Type: 1
data[optr++] = 0x4c; // 4c Property Identifier: object-list (76)
BACnetUtil.InsertInt16(data, ref store_length_here, optr);
bnm.insideSocket.OurSendTo(data, optr, device.packet.directlyConnectedIPEndPointOfDevice);
}