Re: [Bluez-devel] About concurrency sdp_connect

Peter Wippich
2006-09-14T12:01:43Z

Hi Fabrizio,

On Thu, 14 Sep 2006, Fabrizio Guglielmino wrote:

> Are You sure it's hardware restriction?
> sdp_connect internally use the socket abstaction to create a l2cap
> socket and make a
> connection with standard connect.
> In old threads there is a discussion about actual software limitation of
> l2cap layer to make simultaneous
> connection so I think the problem in sdp_connect is the same.....
> bye

Well, maybe you did not went back far enough. The real problem is that
(all ?) Bluetooth hardware devices do not allow a second connect request
while another connect request is pending. I remember there was some
discussion to solve this in the l2cap layer by serializing connect
requests or reacting to the hardware responses proberly (retrying the
request when the hardware responds with command disallowed or similar to
the connect request). However, I don't know the current state . Get lost
somewhere ....

Ciao,
Peter

| Peter Wippich Voice: +49 30 46776411 |
| G&W Instruments GmbH fax: +49 30 46776419 |
| Gustav-Meyer-Allee 25, Geb. 12 Email: pewi@gw-instruments.de |
| D-13355 Berlin / Germany |

-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo