// Helper routine for finalizing message state ready for sending.
// If justFree, simply frees message buffer.
// If dispatchAction=BabelConstants.SEND_TO_ROUTER, sends message to router.
// If dispatchAction=BabelConstants.POST_TO_WRITE, pushes message onto oPort's Write Q.
public void FinishMessageTransaction()
{
if (Finish == FinishAction.Free)
{
Manager.IoBuffersFreeHeap.Release(IoIndex);
}
else if (Finish == FinishAction.Keep)
{
}
else
{
if (ReturnCmd != 0)
{
MsgBuffer.command(ReturnCmd);
}
if (ChangeDir)
{
// Change general message direction:
// r<>s, RNetIf<>SNetIf, rPort<>sPort,
// Invert Is Reply flag, clear ACK flag
byte ports, flags = MsgBuffer.flagsRS();
ushort sender = MsgBuffer.sender();
MsgBuffer.sender(MsgBuffer.receiver());
MsgBuffer.receiver(sender);
flags ^= ProtocolConstants.MESSAGE_FLAGS_IS_REPLY;
flags &= Primitives.ByteNeg(ProtocolConstants.MESSAGE_FLAGS_ACK);
// Now swap ports.
ports = (byte)(flags & ProtocolConstants.MESSAGE_PORTS_MASK);
ports = (byte)((ports << 2) | (ports >> 2));
MsgBuffer.flagsRS((byte)((ports & ProtocolConstants.MESSAGE_PORTS_MASK) | (flags & ProtocolConstants.MESSAGE_FLAGS_MASK)));
}
else
{
// Caller might be relaying message to another adrs:netIf.
// So leave flagsRS alone.
}
MsgBuffer.pktLen = (byte)(ProtocolConstants.GENERAL_OVERHEADS_SIZE + MsgBuffer.dataLength());
MsgBuffer.UpdateCheckSum(MsgBuffer.pktLen);
if (Dispatch == Router.RouterAction.SendToRouter)
{
Router.RouteMessage(Manager, IoIndex);
}
else if (Dispatch == Router.RouterAction.PostToNetIf)
{
Router.PostMessage(Manager, IoIndex, ONetIfIndex);
}
}
}