Return-Path: Message-ID: <40718881.4050709@uni-paderborn.de> Date: Mon, 05 Apr 2004 18:25:37 +0200 From: Stefan Mischke MIME-Version: 1.0 To: Marcel Holtmann CC: BlueZ Mailing List Subject: Re: [Bluez-devel] L2CAP and SDP interface specification? References: <407174BC.8020503@uni-paderborn.de> <1081179607.2843.9.camel@pegasus> In-Reply-To: <1081179607.2843.9.camel@pegasus> Content-Type: text/html; charset=us-ascii List-ID: Hi Marcel,

in your "btk2003_slides.pdf" (very nice) you say on page 13 "C/C++ API für Kommandos und Events". Where is it? I can send commands easily via the bluez-libs' "hci_send_cmd", but how do I get the result/event? Ok, I could use "hci_send_req", but that function blocks until timeout. Isn't there a simple way to use "hci_send_cmd" and register some kind of callback for the result/event? Isn't bluetooth devices interrupt-driven? If not, isn't there some kind of global polling and event dispatching instance? I thought it was the hcid.

By "Glib" you mean "glib-ectomy.c" of hcid? In it's main loop it does "rc = poll(ufds, nfds, -1);". Does it wait/block forever for an event or what does "-1" mean? Btw, what's hcid for (except for initializing the device and giving it a name)?

I'm coming from the Windows realm and therefore, I'm not so familiar with Linux programming. Sorry for the stupid questions. ;-)

Thanks,
Stefan

Marcel Holtmann schrieb:

Hi Stefan,

where can I find the specification of the BlueZ L2CAP and SDP API? I 
hope there ist any.


the L2CAP API is a socket interface and you will find the API in the
bluetooth/l2cap.h header file. For an usage example look at l2test.

The SDP API can be found in bluetooth/sdp.h and bluetooth/sdp_lib.h and
for example code look at the dund and pand applications.

And how can I register my application for getting HCI events, so that I 
don't have to poll? hcid? API/specs?


The HCI API is also a socket interface. If you want to have some kind of
event based approach you have to use and IO event main loop like it is
used in the Glib.

Regards

Marcel