// Push message on to RNetIfIndex's Write Q.
// Messages that cannot be posted are freed.
public static void PostMessage(NetIfManager manager, int ioIndex, byte rNetIfIndex)
{
String dbgmsg = null;
if (ioIndex == -1)
{
return;
}
LinkDriver p = manager.GetLinkDriver(rNetIfIndex);
if (p == null)
{
rNetIfIndex = ProtocolConstants.NETIF_UNSET;
}
if ((p != null) || !isMaster) // Check destination netIf was not detached.
{
if (p == null)
{
p = manager.GetLinkDriver(ProtocolConstants.NETIF_BRIDGE_LINK);
}
if (p != null)
{
PacketBuffer b = manager.IoBuffers[ioIndex];
// Check for circular routing: examine prior destination netIf.
if ((b.dNetIf != ProtocolConstants.NETIF_UNSET) && (b.dNetIf == rNetIfIndex))
{
// Ignore circular messages.
dbgmsg = String.Format("Circular message on netIf [{0}]: ditching message.", rNetIfIndex);
}
else
{
b.dNetIf = rNetIfIndex;
if (p.NetIfIndex == ProtocolConstants.NETIF_BRIDGE_LINK)
{
byte netIfs = (byte)((rNetIfIndex << 4) | b.iNetIf); // Use destination to pass netIfs across bridge.
b.destination((ushort)(((256 - netIfs) << 8) | netIfs));
}
if (p.LinkWriteQueue.Push(ioIndex) != -1) // Check post queue not full.
{
if (Settings.DebugLevel > 6)
{
Log.d(TAG, "Posting:" + ioIndex + " to " + p.NetIfIndex);
}
return;
}
dbgmsg = String.Format("Write Q full on netIf [{0}]: ditching message.", rNetIfIndex);
}
}
}
// Messages that were not posted are freed.
if (Settings.DebugLevel > 1)
{
Log.w(TAG, dbgmsg);
}
manager.IoBuffersFreeHeap.Release(ioIndex);
}
// IOPort set up serial number for device at other end of link.
// For the master port, set up temp SN and append netIfIndex.
// For all other ports, set SN idx to null. It will be set when device connects.
public void NetIfSerialNumberSetup(byte netIfIndex)
{
LinkDriver p = Manager.GetLinkDriver(netIfIndex);
if (p != null)
{
if (netIfIndex == ProtocolConstants.NETIF_USER_BASE)
{
byte len;
int idx = SerialNumbersFreeHeap.Allocate();
if (idx != -1)
{
len = Primitives.Strlen(MasterSN);
CopyToSerialNumber(idx, len, MasterSN, 0);
IoSerialNumbers[idx].Text[len - 1] = Primitives.NibbleToHexChar(netIfIndex);
}
p.SerialIndex = idx;
}
else
{
p.SerialIndex = -1;
}
}
}