[Bluez-devel] Lost L2CAP packet problems in 2.6.0-test5

[Alexandros Karypidis <karypid@inf.uth.gr>]

Hi all,

I am having some problems with the last packet sent over an L2CAP connection 
using 2.6.0-test5.

The short description:

I have a program which runs correctly on 2.4.22. It is a simple packet 
exchange over an L2CAP connection among peers A and B. When I run it using 
2.6.0, it always loses the last packet sent from peer A to peer B.

Peer A closes the connection after sending the last packet. IMPORTANT: Peer A 
is a custom-built embedded device which does not even have an OS. It is a 
dumb device which does not have a real BT stack. It simply repeats a sequence 
of HCI commands which results in an L2CAP connection establishment, a couple 
of small packets being exchanged (less than 100 bytes payload) and then the 
connection being torn down.

Now, I am pretty sure that A operates correctly, because whenever I run the 
client B on a computer with the 2.4.22 kernel (tested both with BlueZ and 
Affix stacks), everything works perfectly.

Whenever I run client B on a computer with the 2.6.0-test5 kernel, the last 
packet sent from A before the connection is closed is lost.

-- 
In theory, there is no difference between theory and practice.
In practice, there is. -- Yogi Berra.

Alexandros Karypidis
University of Thessaly
Computer & Communications Engineering dept.



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