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??");
}
}