Subject: Problems opening connections for an HDP implementation.

Hi everybody,

I am developing a free/open source implementation of HDP using sancane's MCAP
implementation. I am using ERTM and STREAMING mode provided by Gustavo's
patches from 3th October. I've been testing my implementation between two
computers (both of them using the previously mentioned profiles). This test
seems working correctly but I am also trying to test it against a Nonin Onix
II 9560BT PulseOximeter (certified by Continua). This device is using HDP but
when I try to test my HDP implementation I've observed that the MCAP control
channel L2CAP connection is not correctly opened (see trace bellow)

...
> HCI Event: Number of Completed Packets (0x13) plen 5
handle 46 packets 1
> ACL data: handle 46 flags 0x02 dlen 12
L2CAP(s): Connect req: psm 49704 scid 0x0041
< ACL data: handle 46 flags 0x02 dlen 16
L2CAP(s): Connect rsp: dcid 0x0040 scid 0x0041 result 0 status 0
Connection successful
....

There is a thread waiting for incoming connections on this psm, but it is
never waked up from the recv system call.

.....
> HCI Event: Number of Completed Packets (0x13) plen 5
handle 46 packets 1
> HCI Event: Link Key Request (0x17) plen 6
bdaddr 00:1C:05:00:19:56
< HCI Command: Link Key Request Reply (0x01|0x000b) plen 22
bdaddr 00:1C:05:00:19:56 key DD4D176E23CDB1D95334CD8A7D077773
> HCI Event: Command Complete (0x0e) plen 10
Link Key Request Reply (0x01|0x000b) ncmd 1
status 0x00 bdaddr 00:1C:05:00:19:56
> HCI Event: Encrypt Change (0x08) plen 4
status 0x00 handle 46 encrypt 0x01
< HCI Command: Read RSSI (0x05|0x0005) plen 2
handle 46
....
This part of the trace is repeated until local host closes L2CAP connection.
....

< ACL data: handle 46 flags 0x02 dlen 12
L2CAP(s): Disconn req: dcid 0x0041 scid 0x0040
> HCI Event: Number of Completed Packets (0x13) plen 5
handle 46 packets 1
> ACL data: handle 46 flags 0x02 dlen 12
L2CAP(s): Disconn rsp: dcid 0x0041 scid 0x0040
....

> HCI Event: Command Complete (0x0e) plen 7
Read Transmit Power Level (0x03|0x002d) ncmd 1
status 0x00 handle 46 level 3
< HCI Command: Disconnect (0x01|0x0006) plen 3
handle 46 reason 0x13
Reason: Remote User Terminated Connection
> HCI Event: Command Status (0x0f) plen 4
Disconnect (0x01|0x0006) status 0x00 ncmd 1
> HCI Event: Disconn Complete (0x05) plen 4
status 0x00 handle 46 reason 0x16
Reason: Connection Terminated by Local Host


What am I doing wrong? Why the connection to this socket is not finished?

If you are interested in the complete trace I can send it to you.


Thank you very much.
Regards.

Jose.




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2009-11-06 11:03:39

by Santiago Carot

[permalink] [raw]
Subject: Re: Problems opening connections for an HDP implementation.

sancane escribi?:
> Hi Jos?,
>
> Jos? Antonio Santos Cadenas escribi?:
>> Hi everybody,
>>
>> I am developing a free/open source implementation of HDP using sancane's MCAP
>> implementation. I am using ERTM and STREAMING mode provided by Gustavo's
>> patches from 3th October. I've been testing my implementation between two
>> computers (both of them using the previously mentioned profiles). This test
>> seems working correctly but I am also trying to test it against a Nonin Onix
>> II 9560BT PulseOximeter (certified by Continua). This device is using HDP but
>> when I try to test my HDP implementation I've observed that the MCAP control
>> channel L2CAP connection is not correctly opened (see trace bellow)
>>
>> ...
>>> HCI Event: Number of Completed Packets (0x13) plen 5
>> handle 46 packets 1
>>> ACL data: handle 46 flags 0x02 dlen 12
>> L2CAP(s): Connect req: psm 49704 scid 0x0041
>> < ACL data: handle 46 flags 0x02 dlen 16
>> L2CAP(s): Connect rsp: dcid 0x0040 scid 0x0041 result 0 status 0
>> Connection successful
>> ....
>>
>> There is a thread waiting for incoming connections on this psm, but it is
>> never waked up from the recv system call.
>>
>
> MCAP control channels are simply L2CAP socket with ERTM enabled. Current
> implementations waits in a recv

sorry:
sed s/recv/accept

> call for incoming connections. When a
> device connect with you, the thread is waked up to create an MCAP
> Communications Link (MCL). Since here, all negotiations are established
> using MCAP commands.
> At a minimum, the l2cap connection should be opened before MCAP working
> thread will be waked up.
> I suspect that the problem is that the l2cap with ERMT connections is
> not opened.
>
>> .....
>>> HCI Event: Number of Completed Packets (0x13) plen 5
>> handle 46 packets 1
>>> HCI Event: Link Key Request (0x17) plen 6
>> bdaddr 00:1C:05:00:19:56
>> < HCI Command: Link Key Request Reply (0x01|0x000b) plen 22
>> bdaddr 00:1C:05:00:19:56 key DD4D176E23CDB1D95334CD8A7D077773
>>> HCI Event: Command Complete (0x0e) plen 10
>> Link Key Request Reply (0x01|0x000b) ncmd 1
>> status 0x00 bdaddr 00:1C:05:00:19:56
>>> HCI Event: Encrypt Change (0x08) plen 4
>> status 0x00 handle 46 encrypt 0x01
>> < HCI Command: Read RSSI (0x05|0x0005) plen 2
>> handle 46
>> ....
>> This part of the trace is repeated until local host closes L2CAP connection.
>> ....
>>
>> < ACL data: handle 46 flags 0x02 dlen 12
>> L2CAP(s): Disconn req: dcid 0x0041 scid 0x0040
>>> HCI Event: Number of Completed Packets (0x13) plen 5
>> handle 46 packets 1
>>> ACL data: handle 46 flags 0x02 dlen 12
>> L2CAP(s): Disconn rsp: dcid 0x0041 scid 0x0040
>> ....
>>
>>> HCI Event: Command Complete (0x0e) plen 7
>> Read Transmit Power Level (0x03|0x002d) ncmd 1
>> status 0x00 handle 46 level 3
>> < HCI Command: Disconnect (0x01|0x0006) plen 3
>> handle 46 reason 0x13
>> Reason: Remote User Terminated Connection
>>> HCI Event: Command Status (0x0f) plen 4
>> Disconnect (0x01|0x0006) status 0x00 ncmd 1
>>> HCI Event: Disconn Complete (0x05) plen 4
>> status 0x00 handle 46 reason 0x16
>> Reason: Connection Terminated by Local Host
>>
>>
>> What am I doing wrong? Why the connection to this socket is not finished?
>>
>> If you are interested in the complete trace I can send it to you.
>>
>>
>> Thank you very much.
>> Regards.
>>
>> Jose.
>>
>
>


2009-11-06 09:48:28

by Santiago Carot

[permalink] [raw]
Subject: Re: Problems opening connections for an HDP implementation.

Hi Jos?,

Jos? Antonio Santos Cadenas escribi?:
> Hi everybody,
>
> I am developing a free/open source implementation of HDP using sancane's MCAP
> implementation. I am using ERTM and STREAMING mode provided by Gustavo's
> patches from 3th October. I've been testing my implementation between two
> computers (both of them using the previously mentioned profiles). This test
> seems working correctly but I am also trying to test it against a Nonin Onix
> II 9560BT PulseOximeter (certified by Continua). This device is using HDP but
> when I try to test my HDP implementation I've observed that the MCAP control
> channel L2CAP connection is not correctly opened (see trace bellow)
>
> ...
>> HCI Event: Number of Completed Packets (0x13) plen 5
> handle 46 packets 1
>> ACL data: handle 46 flags 0x02 dlen 12
> L2CAP(s): Connect req: psm 49704 scid 0x0041
> < ACL data: handle 46 flags 0x02 dlen 16
> L2CAP(s): Connect rsp: dcid 0x0040 scid 0x0041 result 0 status 0
> Connection successful
> ....
>
> There is a thread waiting for incoming connections on this psm, but it is
> never waked up from the recv system call.
>

MCAP control channels are simply L2CAP socket with ERTM enabled. Current
implementations waits in a recv call for incoming connections. When a
device connect with you, the thread is waked up to create an MCAP
Communications Link (MCL). Since here, all negotiations are established
using MCAP commands.
At a minimum, the l2cap connection should be opened before MCAP working
thread will be waked up.
I suspect that the problem is that the l2cap with ERMT connections is
not opened.

> .....
>> HCI Event: Number of Completed Packets (0x13) plen 5
> handle 46 packets 1
>> HCI Event: Link Key Request (0x17) plen 6
> bdaddr 00:1C:05:00:19:56
> < HCI Command: Link Key Request Reply (0x01|0x000b) plen 22
> bdaddr 00:1C:05:00:19:56 key DD4D176E23CDB1D95334CD8A7D077773
>> HCI Event: Command Complete (0x0e) plen 10
> Link Key Request Reply (0x01|0x000b) ncmd 1
> status 0x00 bdaddr 00:1C:05:00:19:56
>> HCI Event: Encrypt Change (0x08) plen 4
> status 0x00 handle 46 encrypt 0x01
> < HCI Command: Read RSSI (0x05|0x0005) plen 2
> handle 46
> ....
> This part of the trace is repeated until local host closes L2CAP connection.
> ....
>
> < ACL data: handle 46 flags 0x02 dlen 12
> L2CAP(s): Disconn req: dcid 0x0041 scid 0x0040
>> HCI Event: Number of Completed Packets (0x13) plen 5
> handle 46 packets 1
>> ACL data: handle 46 flags 0x02 dlen 12
> L2CAP(s): Disconn rsp: dcid 0x0041 scid 0x0040
> ....
>
>> HCI Event: Command Complete (0x0e) plen 7
> Read Transmit Power Level (0x03|0x002d) ncmd 1
> status 0x00 handle 46 level 3
> < HCI Command: Disconnect (0x01|0x0006) plen 3
> handle 46 reason 0x13
> Reason: Remote User Terminated Connection
>> HCI Event: Command Status (0x0f) plen 4
> Disconnect (0x01|0x0006) status 0x00 ncmd 1
>> HCI Event: Disconn Complete (0x05) plen 4
> status 0x00 handle 46 reason 0x16
> Reason: Connection Terminated by Local Host
>
>
> What am I doing wrong? Why the connection to this socket is not finished?
>
> If you are interested in the complete trace I can send it to you.
>
>
> Thank you very much.
> Regards.
>
> Jose.
>