Return-Path: Message-ID: Date: Mon, 4 Dec 2006 09:36:41 +0100 From: "Mikael Lindqvist" To: "BlueZ users" In-Reply-To: <1165180510.19590.68.camel@localhost> MIME-Version: 1.0 References: <1165171236.19590.65.camel@localhost> <1165180510.19590.68.camel@localhost> Subject: Re: [Bluez-users] Timeout for connections Reply-To: BlueZ users List-Id: BlueZ users List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Sender: bluez-users-bounces@lists.sourceforge.net Errors-To: bluez-users-bounces@lists.sourceforge.net Hi Marcel, I ended up creating a little helper program that I run suid root that sets the Page Timeout on startup of my application. I also use this program to set the local name and try to force the inquiry mode to get RSSI. I have a feeling that you won't like hearing about this at all and you will probably take the opportunity to tell me I should use D-BUS. Something which I'm thinking about more and more. The problem with D-BUS is just that there is no Obex service available, and I don't want half my application using D-BUS and the other half not. So then I'm thinking more and more about writing a D-BUS Obex service. But before I do that it would be nice to get some feedback on the thoughts I have for that API. Where would be a good place to get that feedback? This mailing list is certanly one place, but what more is there? -- Mikael On 12/3/06, Marcel Holtmann wrote: > Hi Mikael, > > > > > I would like to be able to set a timeout for service discoveries (and > > > > eventually for rfcomm connections as well, but so far I've been > > > > experimenting with service discoveries). For this I use non blocking > > > > sockets by passing SDP_NON_BLOCKING to sdp_connect. Then I use select > > > > with a timeout on the socket, and if it times out I call sdp_close. > > > > > > > > The problem is that after I have done this I can't use the bluetooth > > > > chip for other connections for some time. Dumping the traffic with > > > > hcidump, I saw that this is because even though the l2cap socket is > > > > closed, the bluetooth chip is still doing the connection in the > > > > background. For this connection to actually get canceled the chip > > > > needs to be sent a HCI_Create_Connection_Cancel command, but it is not > > > > sent when the socket is closed. > > > > > > use a 2.6.19 kernel and this command will be sent. > > > > > > > Oh ok... Haven't had to build my own kernel before but I guess there > > is a first time for everything... I'm using ubuntu and they say it > > won't be available until next version in april... Problem is that > > there are people who I can't tell "build the latest kernel" who relies > > on the software I'm developing... what to do... > > there is a chance that Fedora Core will update their kernel to 2.6.19 > very soon. Otherwise you are out of luck. > > > Is there another way I can set a timeout for connections? > > No. Only the kernel can keep track of connections. If you try to do it > by yourself in userspace you will break more than you fix. The reference > count for the ACL link is tricky and only the kernel has all needed > information to do it right. > > Regards > > Marcel > > > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share your > opinions on IT & business topics through brief surveys - and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Bluez-users mailing list > Bluez-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bluez-users > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Bluez-users mailing list Bluez-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-users