Re: [Bluez-devel] hci inquiry error with name scan

["Vikas Sinha" <compuvikas@gmail.com>]

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Thanks Andreas,
I am waiting for ur patch. If there anything I can do please tell me. I took
other way to overcome this problem. I have allocated MAX space for array of
inquery structure (i.e. 256) and then doing inquiry and making it memset
zero after using its result.  I think ur right .



On 6/1/07, Andreas Gaufer <Andreas.Gaufer@bluecellnetworks.com> wrote:
>
> Hi Avaited,
>
> i believe this is a bug in hci.c in the bluez-libs package. It returns
> wrong names if multiple hci_read_remote_name calls are done in a short
> period of time.
>
> hci_send_req which is used by hci_read_remote_name returns data of the
> first EVT_REMOTE_NAME_REQ_COMPLETE that occurs on the device even if it
> does not match the bdaddres that was requested.
>
> This problem was also already noticed by Sjoerd Simons in June 2004 and
> sent to this list with the subject "btaddr <-> name bug ?" (1)
>
> I prepared a patch that should fix that problem. I will provide that
> patch on this list as soon as I'm finished with stress-testing it.
>
> Greetings
>
> Andy
>
>
> 1) http://thread.gmane.org/gmane.linux.bluez.devel/2489/focus=2491
>
>
> On Tue, 26 Dec 2006 04:47:47 +0000 (UTC)
> Avaited <compuvikas@gmail.com> wrote:
>
> > hi all
> >
> > I am facing a big problem with hci layer process. I have developed a
> platform
> > and http wraper for bluetooth services using bluez.  I am searching all
> device
> > present in vicinity by using hci.c function 'hci_scan()'. later for each
> > number(BDADDR) i am searching its name by hci_read_remote_name(). Most
> of the
> > time I am getting right name(i.e. what ever name i am giving to my
> devices ) But
> > some time name get swaped with some one. Lisk in my case my mobile name
> was
> > SHARK and my Machine name was VIKAS [0], VIKAS[1], my friends mobile was
> GOLD,
> > SILVER. but when I had done scan name it returned me my mobile,s name as
> > VIKAS[1]. I am surprise why this happened.
> >
> > Is there any problem with present bluez stack I am using
> > bluez-bluefw-1.0-6
> > bluez-pin-0.23-3
> > bluez-hcidump-1.11-1
> > bluez-libs-2.10-2
> > bluez-utils-2.10-2.1
> > on redhat 4.0 Enterprise Edition
> > with kernel 2.6.9-5.EL i386
> > int getScanName(bdaddr_t *device_bt,char * device_name,bdaddr_t
> *dongle_bt)
> > {
> >         if((s = GetScanSock(dongle_bt)) < 0)    // this will connect to
> local dongle
> >         {
> >                 ERR_LOG(ERR,"Unable to open socket");
> >                 return -s;
> >         }
> >         if(hci_read_remote_name(s,
> device_bt,sizeof(device_name),device_name,0) < 0)
> >         {
> >                 ERR_LOG(DBG,"No Name found");
> >                 close(s);
> >                 return -NOTFOUND;
> >         }
> >         ERR_LOG(DBG,"Name of Device hci scan  [%s] DeviceBT
> > [%s]",device_name,device_bt);
> >         close(s);
> >         return 0;
> > }
> > this function get called for each device found in scan.
> >
> >
> > I am in deep trouble to know what is problem with this.
> >
> > Please help
> >
> >
> >
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-- 
Impossible
itself contain
I M Possible

Vikas

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