private void Input_OnReceive(object sender, ChannelReceivedEventArgs e)
{
MbapHeader header = MbapHeader.Decode(e.Message);
if (header == null)
{
logger?.LogWarning("MBAP Header returned null");
return; //assume keep alive
}
if (!map.HasItem(header.UnitId))
{
byte[] errorMsg = ModbusErrorMessage.Create(e.Message, ErrorCode.GatewayPathsNotAvailable);
this.InputChannel.SendAsync(errorMsg).GetAwaiter();
return;
}
if (!map.GetItem(header.UnitId).Authorize(e.Message))
{
byte[] errorMsg = ModbusErrorMessage.Create(e.Message, ErrorCode.IllegalAddress);
this.InputChannel.SendAsync(errorMsg).GetAwaiter();
return;
}
byte[] message = e.Message;
byte[] msg = null;
foreach (var filter in InputFilters)
{
msg = filter.Execute(message);
msg ??= message;
}
OutputChannel.SendAsync(msg).GetAwaiter();
}
private void Cache_OnExpired(object sender, CacheItemExpiredEventArgs e)
{
Tuple <ushort, byte[]> tuple = (Tuple <ushort, byte[]>)e.Value;
byte[] errorMsg = ModbusErrorMessage.Create(tuple.Item2, ErrorCode.DeviceFailedToRespond);
OnReceive?.Invoke(this, new ChannelReceivedEventArgs(channel.Id, errorMsg));
}