[Bluez-users] Where does the Bluez stores registered services?

[Bluez-users] Where does the Bluez stores registered services?

[Tushar Paturde]

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Hi,
I had registered one btl2cap service  using Bluez api's . Even after
stopping the service it is still returned by service discovery done from
another device. I would like to know where is the registry of these services
maintained by bluez library.  Also how can I modify this services registry ?

Regards,

Tushar Paturde

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Re: [Bluez-users] Where does the Bluez stores registered services?

[Marcel Holtmann]

Hi Tushar,

> I had registered one btl2cap service  using Bluez api's . Even after
> stopping the service it is still returned by service discovery done
> from another device. I would like to know where is the registry of
> these services maintained by bluez library.  Also how can I modify
> this services registry ? 

if the service record doesn't disappear, then your code is wrong. You
have used persistent SDP records. Don't do that. And it is even better
to register the service records over D-Bus.

Regards

Marcel



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Re: [Bluez-users] Where does the Bluez stores registered services?

[Tushar Paturde]

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Hi Marcel,
The code snippet  that I'm using for registering  new service record is as
below .

#define BT_INVALID_SDDB_HANDLE 0
....
bt_result_t bt_sddb_update_record(bt_record_t *record)
{
    int scanned;
    sdp_record_t *rec = sdp_extract_pdu((uint8_t *)record->data, &scanned);
    if (rec == NULL) {
        return BT_RESULT_FAILURE;
    }

    if (record->id == BT_INVALID_SDDB_HANDLE) {
        if (sdp_record_register(g_sess, rec, 0) < 0) {
            sdp_record_free(rec);
            return BT_RESULT_FAILURE;
        }
        record->id = (bt_sddbid_t)rec->handle;
        return BT_RESULT_SUCCESS;
    } else {
        int retval;
        rec->handle = record->id;
        retval = sdp_record_update(g_sess, rec);
        sdp_record_free(rec);
        if (retval < 0) {
            return BT_RESULT_FAILURE;
        }
        record->id = (bt_sddbid_t)rec->handle;
        return BT_RESULT_SUCCESS;
    }
}


In this code sdp_record_register return with success but the  value of
"rec->handle " is set to zero (0).  This is problem for me. I think the
value should be greater than zero or ideally 1. Because the "record" that is
passed with service information has set it's handle to zero i.e it point to
the default service record.

This is causes problem in the upper layer of java implementation . So I need
to kill the app manually at present. But it seems "sdp_record_register"
operation is success because the registered service can be  browsed by
external device.


Regards,

Tushar

NB: This code snippet is part of phonme project jsr82 implementation
btSDDB.c .


On 4/16/07, Marcel Holtmann <marcel@holtmann.org> wrote:
>
> Hi Tushar,
>
> > I had registered one btl2cap service  using Bluez api's . Even after
> > stopping the service it is still returned by service discovery done
> > from another device. I would like to know where is the registry of
> > these services maintained by bluez library.  Also how can I modify
> > this services registry ?
>
> if the service record doesn't disappear, then your code is wrong. You
> have used persistent SDP records. Don't do that. And it is even better
> to register the service records over D-Bus.
>
> Regards
>
> Marcel
>
>
>
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> Download DB2 Express C - the FREE version of DB2 express and take
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-- 
Tushar Paturde

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Re: [Bluez-users] Where does the Bluez stores registered services?

[Marcel Holtmann]

Hi Tushar,

> The code snippet  that I'm using for registering  new service record
> is as below .
> 
> #define BT_INVALID_SDDB_HANDLE 0
> ....
> bt_result_t bt_sddb_update_record(bt_record_t *record) 
> {
>     int scanned;
>     sdp_record_t *rec = sdp_extract_pdu((uint8_t *)record->data,
> &scanned);
>     if (rec == NULL) {
>         return BT_RESULT_FAILURE;
>     }
> 
>     if (record->id == BT_INVALID_SDDB_HANDLE) { 
>         if (sdp_record_register(g_sess, rec, 0) < 0) {
>             sdp_record_free(rec);
>             return BT_RESULT_FAILURE;
>         }
>         record->id = (bt_sddbid_t)rec->handle;
>         return BT_RESULT_SUCCESS;
>     } else {
>         int retval;
>         rec->handle = record->id;
>         retval = sdp_record_update(g_sess, rec);
>         sdp_record_free(rec);
>         if (retval < 0) { 
>             return BT_RESULT_FAILURE;
>         }
>         record->id = (bt_sddbid_t)rec->handle;
>         return BT_RESULT_SUCCESS;
>     }
> }
> 
> 
> 
> In this code sdp_record_register return with success but the   value
> of "rec->handle " is set to zero (0).  This is problem for me. I think
> the value should be greater than zero or ideally 1. Because the "
> record" that is passed with service information has set it's handle to
> zero i.e it point to the default service record.  
> 
> This is causes problem in the upper layer of java implementation . So
> I need to kill the app manually at present. But it seems
> "sdp_record_register" operation is success because the registered
> service can be  browsed by external device. 

I don't see your problem, but you might really consider to use the D-Bus
based service record registration. You can even use XML based service
record description.

Regards

Marcel



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