private byte[] GetAmsMessage(byte[] tcpHeader)
{
uint responseLength = AmsHeaderHelper.GetResponseLength(tcpHeader);
byte[] response = new byte[responseLength];
GetMessage(response);
return(response);
}
//This is different thread!
private void ReadCallback(object sender, AmsSocketResponseArgs args)
{
if (args.Error != null)
{
// Lock the list.
lock (pendingResultsLock)
{
if (pendingResults.Count > 0)
{
foreach (var adsCommandResult in pendingResults.ToList())
{
adsCommandResult.UnknownException = args.Error;
adsCommandResult.Callback.Invoke(adsCommandResult);
}
}
else
{
throw args.Error;
}
}
}
if ((args.Response != null) && (args.Response.Length > 0) && (args.Error == null))
{
uint amsErrorCode = AmsHeaderHelper.GetErrorCode(args.Response);
uint invokeId = AmsHeaderHelper.GetInvokeId(args.Response);
bool isNotification = (AmsHeaderHelper.GetCommandId(args.Response) == AdsCommandId.DeviceNotification);
if (AmsPortTarget != AmsHeaderHelper.GetAmsPortSource(args.Response))
{
return;
}
if (!AmsNetIdTarget.Bytes.SequenceEqual(AmsHeaderHelper.GetAmsNetIdSource(args.Response)))
{
return;
}
//If notification then just start the callback
if (isNotification && (OnNotification != null))
{
var notifications = AdsNotification.GetNotifications(args.Response);
foreach (var notification in notifications)
{
var notificationRequest = NotificationRequests.FirstOrDefault(n => n.NotificationHandle == notification.NotificationHandle);
if (notificationRequest != null)
{
notificationRequest.ByteValue = notification.ByteValue;
if ((args.Context != null) && (RunNotificationsOnMainThread))
{
args.Context.Post(
new SendOrPostCallback(delegate
{
OnNotification(null, new AdsNotificationArgs(notificationRequest));
}), null);
}
else
{
OnNotification(null, new AdsNotificationArgs(notificationRequest));
}
}
}
}
//If not a notification then find the original command and call async callback
if (!isNotification)
{
AdsCommandResponse adsCommandResult = null;
// Do some locking before fiddling with the list.
lock (pendingResultsLock)
{
adsCommandResult = pendingResults.FirstOrDefault(r => r.CommandInvokeId == invokeId);
if (adsCommandResult == null)
{
return;
}
//throw new AdsException("I received a response from a request I didn't send?");
pendingResults.Remove(adsCommandResult);
}
if (amsErrorCode > 0)
{
adsCommandResult.AmsErrorCode = amsErrorCode;
}
else
{
adsCommandResult.SetResponse(args.Response);
}
adsCommandResult.Callback.Invoke(adsCommandResult);
}
}
}
