RE: drvAsynIPPort question

[Mark Rivers <rivers@cars.uchicago.edu>]

> I see that connection is closed in asynCommonDisconnect() method (file 
> interfaces/asynOctetSyncIO.c), but it isn't quite clear to me how this 
> method would get called (pasynOctetSyncIO->disconnect() does not seem to 
> do it).

The method you need to call is pasynCommonSyncIO->disconnectDevice(pasynUser)

Note that the pasynUser that you pass in this call must be created with pasynCommonSyncIO->connect(), and it must NOT be the pasynUser that you created with pasynOctetSyncIO->connect().  That is a common mistake.

Note that the asyn unfortunately has two meanings of the term "connect".  

1) The first meaning is to connect a pasynUser to an asyn port driver and address.
2) The second to connect the asyn port driver to the underlying device, in your case a TCP socket.

pasynManager->connectDevice does the type 1 connection.
pasynCommon->connect does the type 2 connection.

To make things even more confusing the terms "connect" and "connectDevice" are reversed in the asynXXXSyncIO functions.

The asynXXXSyncIO functions pasynXXXSyncIO->connect do a type 1 connection.  This really should have been called "connectDevice" to make it consistent with the pasynManager function.

pasynCommonSyncIO->connect does a type 1 connection, to be consistent with all of the other asynXXXSyncIO methods.  pasynCommonSyncIO->connectDevice does a type 2 connection, while this should have been called "connect" to be consistent with the pasynCommon method.

Unfortunately we need to live with these names, it's too late to change them now.

Mark

-----Original Message-----
From: tech-talk-bounces@aps.anl.gov [mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of Sinisa Veseli
Sent: Wednesday, March 20, 2013 12:02 PM
To: tech-talk@aps.anl.gov
Subject: drvAsynIPPort question

Hi,

Does anyone know what is the proper way to destroy tcp socket created 
via drvAsynIPPortConfigure?

My test client and server use drvAsynIPPortConfigure and 
drvAsynIPServerPortConfigure from asyn 4-18, and I can connect and 
exchange data between the two. However, no matter what I try, I am not 
able to destroy the client socket properly.

I see that connection is closed in asynCommonDisconnect() method (file 
interfaces/asynOctetSyncIO.c), but it isn't quite clear to me how this 
method would get called (pasynOctetSyncIO->disconnect() does not seem to 
do it).


I looked through marCCD.cpp in area detector module (Tim Madden kindly 
pointed that out as an example),  but I only saw 
pasynOctetSyncIO->connect() being called.


In any case, I would appreciate any pointers, and sorry if I'm missing 
something obvious...

Thanks,

Sinisa




-- 
Sinisa Veseli
Software Services Group
APS Engineering Support Division
Argonne National Laboratory
sveseli@anl.gov
(630)252-9182