From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <45094871.7010003@infitsrl.com> Date: Thu, 14 Sep 2006 14:17:53 +0200 From: Fabrizio Guglielmino MIME-Version: 1.0 To: BlueZ development References: <3f5a9ba20609132122ue951876kcdfaacae30110f66@mail.gmail.com> <450940DC.5080809@infitsrl.com> In-Reply-To: Subject: Re: [Bluez-devel] About concurrency sdp_connect Reply-To: BlueZ development List-Id: BlueZ development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Sender: bluez-devel-bounces@lists.sourceforge.net Errors-To: bluez-devel-bounces@lists.sourceforge.net Hi Peter, I'm not expert in bluez kernel driver programming but I've developed an = application using socket abstraction on Windows (microsoft stack) and I can connect simultaneously to many = devices (7 max) with the same usb dongled tested with bluez on linux. So I think it can't be a hardware problem, = or better may be the hardware limitation but I think it's bypassable in software layers. bye Fabrizio Peter Wippich ha scritto: > 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 ea= sier > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=3Dlnk&kid=3D120709&bid=3D263057&dat= =3D121642 > _______________________________________________ > Bluez-devel mailing list > Bluez-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bluez-devel > > > = -- = ______________________________ Fabrizio Guglielmino = Infit Srl Software Engineering Tel. +39 11 7410915 Fax. +39 11 7410915 www.infitsrl.com C.so Svizzera, 79/8 - Torino ______________________________ Il presente messaggio ed ogni eventuale allegato hanno natura confidenziale e sono riservati ai destinatari indicati. La diffusione a terzi e qualsiasi altro uso non autorizzato sono proibiti. I messaggi ed i relativi allegati possono essere soggetti ad alterazioni. Il mittente declina ogni responsabilit=E0 per le eventuali alterazioni, modificazioni o falsificazioni. ------------------------------------------------------------------------- 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 easi= er Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=3Dlnk&kid=3D120709&bid=3D263057&dat=3D1= 21642 _______________________________________________ Bluez-devel mailing list Bluez-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-devel