Re: [Bluez-devel] L2Cap Connection problem : PC - Nokia 6600

[Marcel Holtmann <marcel@holtmann.org>]

Hi,

> I'm a newbie (big surprise :). I'm trying to make a
> simple chat application between a Nokia 6600 phone
> (using j2me ) and my PC (using BlueZ) over L2CAP. The
> problem is that I can't get the connection to start.
> I'm guessing it's from connection parameters
> negotiation (probably imtu and omtu). First I didn't
> supply any of the mtus, neither on pc nor phone, then
> I used the same values (512). On both situations I get
> the following error message from connect : Can't
> connect. Connection refused(111). The phone is the
> server, and the PC is the client. I don't specify a
> psm on the connection string url on the phone because
> I get an exception. Instead I let the BCC of the phone
> supply me one. Then using the sdptool I find the psm
> (which is allways 4097 <-> 0x1001) and use it in the
> client application on the PC to connect. The code is
> very simple. Here it is :

I can't tell you anything about J2ME programming, but in general there
is no need to give the MTU values. The L2CAP will negotiate the default
values. In most cases it is 672.

> HCIDump - HCI packet analyzer ver 1.8
> device: hci0 snap_len: 1028 filter: 0xffffffff
> < HCI Command: Create Connection(0x01|0x0005) plen 13
> > HCI Event: Command Status(0x0f) plen 4
> > HCI Event: Connect Complete(0x03) plen 11
> < ACL data: handle 0x0029 flags 0x02 dlen 12
>     L2CAP(s): Connect req: psm 4097 scid 0x0040
> > HCI Event: Number of Completed Packets(0x13) plen 5
> > HCI Event: Max Slots Change(0x1b) plen 3
> > ACL data: handle 0x0029 flags 0x02 dlen 16
>     L2CAP(s): Connect rsp: dcid 0x0056 scid 0x0040
> result 1 status 2
> > HCI Event: QoS Setup Complete(0x0d) plen 21
> > ACL data: handle 0x0029 flags 0x02 dlen 16
>     L2CAP(s): Connect rsp: dcid 0x0056 scid 0x0040
> result 3 status 0
> < HCI Command: Disconnect(0x01|0x0006) plen 3
> > HCI Event: Command Status(0x0f) plen 4
> > HCI Event: Disconn Complete(0x05) plen 4
> 
> What means result 3 status 0, from hcidump ? Sorry I'm
> not familiar with hcidump. Thanks a lot in advance.

You can open the Bluetooth specification and look it up. However the
result 3 means "Connection refused - security block". There is no
pairing between your devices or the hcid is not running.

Some line above you have result 1 with status 2 and this means
"Connection pending" with "Authorization pending".

Regards

Marcel




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