Return-Path: From: Marcel Holtmann To: BlueZ users In-Reply-To: References: Date: Sun, 03 Dec 2006 19:40:36 +0100 Message-Id: <1165171236.19590.65.camel@localhost> Mime-Version: 1.0 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 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. > To work around this I made some code to send this command myself > before calling sdp_close. This works, but the problem is that you need > to be root to send the HCI_Create_Connection_Cancel command. The > implication being that if you want to set a timeout for service > discovery, you need to be root. And this can't be the case, am I > thinking wrong in some fundamental way? Never ever do that this way. The kernel (and the kernel only) should control the ACL links. 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