Re: [Bluez-users] nonblocking socket

Jeff Wilson
2006-08-03T21:45:22Z

Never mind on the example program, no need to create one, I can
reproduce the problem with sdptool v2.25:

`sdptool browse <remote-addr>`

Failed to connect to SDP server on <remote-addr>: Operation already in progress

local hcidump -X -V

HCI sniffer - Bluetooth packet analyzer ver 1.30
device: hci0 snap_len: 1028 filter: 0xffffffff
< HCI Command: Create Connection (0x01|0x0005) plen 13
bdaddr remote-addr ptype 0xcc18 rswitch 0x01 clkoffset 0x0000
Packet type: DM1 DM3 DM5 DH1 DH3 DH5
> HCI Event: Command Status (0x0f) plen 4
Create Connection (0x01|0x0005) status 0x0b ncmd 1
Error: ACL Connection Already Exists

remote hcidump -X -V

(nothing)

Any ideas? I have rebooted the client since this started up. Thanks
for your time.

Regards,
Jeff

On 8/3/06, Jeff Wilson <jazzbotley@gmail.com> wrote:
> I will put together an example and post it in the next day or two. As
> to "why nonblocking?" it's to service multiple sockets with a single
> thread (event-based approach).
>
> Thanks,
> Jeff
>
> On 8/3/06, Marcel Holtmann <marcel@holtmann.org> wrote:
> > Hi Jeff,
> >
> > > I am using bluez-libs-2.25 on 2.6.11-mh2 to develop BlueZ support for
> > > a multithreaded process. My BlueZ contribution opens a non-blocking
> > > RFCOMM socket in one thread, and blocking SDP query in another. So
> > > far, I have RFCOMM support working, and I have also integrated
> > > Bluetooth inquiry and SDP queries.
> > >
> > > When I set RFCOMM to nonblocking, the sdp_connect returns an error,
> > > with errno set to EALREADY. Why does one thread affect the other?
> > >
> > > This same SDP query worked fine before I change the RFCOMM to nonblocking.
> >
> > can you provide a simple test program for this? It sounds like a strange
> > bug with threading. However why do you need a non-blocking socket when
> > you are using threading?
> >
> > Regards
> >
> > Marcel
> >
> >
> >
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