[Bluez-devel] Belkin USB Adaptors and Failing hci_inquiry

[Bluez-devel] Belkin USB Adaptors and Failing hci_inquiry

[Heba Khamis]

Hi,

I am developing an application for automatic network discovery using bluetooth 
i.e. Running the application will result in connections to any other computers
running the same application:
  - Each application is running a server which accepts connections (once a
  connection is made, the connection is maintained until a transmission
  error occcurs or the socket is closed by either party);
  - and a client which repeatedly queries for bluetooth devices to connect to.

So in total an application makes and
maintains 2*(#other applications) connections.
        
This causes no problems when using the Belkin F8T003 Bluetooth USB Adaptor
(this is a bluetooth v1.1 compliant device).
        
However, when using the Belkin F8T009 Bluetooth USB Adaptor
(this is a bluetooth v1.2 compliant device)
"Device or Resource Busy" errors are observed
when the application tries to query
when there are 3 or more connections maintained by it.

Is this a bluetooth hardware issue,
a Bluez stack issue,
or does Bluez just not support this particular device??
        
I have installed all the latest versions:
  - Bluez-lib
  - Bluez-hcidump
I am running Fedora core 4 with the latest available updates of the kernel.

I've used hcidump to try and figure it out, but all it tells me is:
   HCI Command: Inquiry (0x01|0x0001) plen 5
     lap 0x9e8b33 len 8 num 255
   HCI Event: Command Status (0x0f) plen 4
    Inquiry (0x01|0x0001) status 0x0c ncmd 1
     Error: Command Disallowed

This really doesn't help me to understand why this is happening.
The status of that particular bluetooth device (a Belkin F8T003 Bluetooth USB 
bluetooth v1.1 compliant Adaptor) when the error occurs is as follows:
   a local server socket is listening for connections
   two remote clients are connected to the device
   a local client thread is attempting to query other devices using hci_inquiry

Please advise if I am overlooking something, or if this is not a Bluez issue,
could you please direct me to the appropriate contact.

Thanks,
Heba
 




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Re: [Bluez-devel] Belkin USB Adaptors and Failing hci_inquiry

[Marcel Holtmann]

Hi Heba,

> I am developing an application for automatic network discovery using bluetooth 
> i.e. Running the application will result in connections to any other computers
> running the same application:
>   - Each application is running a server which accepts connections (once a
>   connection is made, the connection is maintained until a transmission
>   error occcurs or the socket is closed by either party);
>   - and a client which repeatedly queries for bluetooth devices to connect to.
> 
> So in total an application makes and
> maintains 2*(#other applications) connections.
>         
> This causes no problems when using the Belkin F8T003 Bluetooth USB Adaptor
> (this is a bluetooth v1.1 compliant device).
>         
> However, when using the Belkin F8T009 Bluetooth USB Adaptor
> (this is a bluetooth v1.2 compliant device)
> "Device or Resource Busy" errors are observed
> when the application tries to query
> when there are 3 or more connections maintained by it.
> 
> Is this a bluetooth hardware issue,
> a Bluez stack issue,
> or does Bluez just not support this particular device??
>         
> I have installed all the latest versions:
>   - Bluez-lib
>   - Bluez-hcidump
> I am running Fedora core 4 with the latest available updates of the kernel.
> 
> I've used hcidump to try and figure it out, but all it tells me is:
>    HCI Command: Inquiry (0x01|0x0001) plen 5
>      lap 0x9e8b33 len 8 num 255
>    HCI Event: Command Status (0x0f) plen 4
>     Inquiry (0x01|0x0001) status 0x0c ncmd 1
>      Error: Command Disallowed
> 
> This really doesn't help me to understand why this is happening.
> The status of that particular bluetooth device (a Belkin F8T003 Bluetooth USB 
> bluetooth v1.1 compliant Adaptor) when the error occurs is as follows:
>    a local server socket is listening for connections
>    two remote clients are connected to the device
>    a local client thread is attempting to query other devices using hci_inquiry
> 
> Please advise if I am overlooking something, or if this is not a Bluez issue,
> could you please direct me to the appropriate contact.

send in the "hciconfig -a" output for both devices.

Regards

Marcel




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[Bluez-devel] Re: Belkin USB Adaptors and Failing hci_inquiry

[Heba Khamis]

Hey Marcel,

Marcel Holtmann <marcel <at> holtmann.org> writes:

> 
> Hi Heba,
> 
>>I am developing an application for automatic network discovery using 
>>bluetooth
>>i.e. Running the application will result in connections to any other 
>>computers
>>running the same application:
>>- Each application is running a server which accepts connections 
>>  (once a connection is made, the connection is maintained until a 
>>  transmission error occcurs or the socket is closed by either party);
>>- and a client which repeatedly queries for bluetooth devices to 
>>  connect to.
>> 
>>So in total an application makes and
>>maintains 2*(#other applications) connections.
>>         
>>This causes no problems when using the Belkin F8T003 Bluetooth USB Adaptor
>>(this is a bluetooth v1.1 compliant device).
>>         
>>However, when using the Belkin F8T009 Bluetooth USB Adaptor
>>(this is a bluetooth v1.2 compliant device)
>>"Device or Resource Busy" errors are observed
>>when the application tries to query
>>when there are 3 or more connections maintained by it.
>>     
>>I have installed all the latest versions:
>>  - Bluez-lib
>>  - Bluez-hcidump
>>I am running Fedora core 4 with the latest available updates of the kernel.
>> 
>>I've used hcidump to try and figure it out, but all it tells me is:
>>   HCI Command: Inquiry (0x01|0x0001) plen 5
>>     lap 0x9e8b33 len 8 num 255
>>   HCI Event: Command Status (0x0f) plen 4
>>    Inquiry (0x01|0x0001) status 0x0c ncmd 1
>>     Error: Command Disallowed
>> 
>>This really doesn't help me to understand why this is happening.
>>The status of that particular bluetooth device 
>>(a Belkin F8T003 Bluetooth USB bluetooth v1.1 compliant Adaptor) 
>>when the error occurs is as follows:
>> a local server socket is listening for connections
>> two remote clients are connected to the device
>> a local client thread is attempting to query other devices 
<< using hci_inquiry
>> 
> 
>send in the "hciconfig -a" output for both devices.
> 
>Regards
> 
>Marcel
>

I did hciconfig -a and realised that some of the machines said:
   UP RUNNING PSCAN ISCAN
while some machines said:
   UP RUNNING (only!)
so I made sure that "service bluetooth start" was called before running the 
app,
however I still get "Device or Resource Busy" when some of the machines are
querying.

I have four machines 
   Linux-01 (with USB v1.2 Bluetooth adaptor)
   Linux-02 (with USB v1.2 Bluetooth adaptor)
   Linux-03 (with USB v1.2 Bluetooth adaptor)
   Linux-oldDongle (with USB v1.1 Bluetooth adaptor)

Before starting hciconfig -a output is as follows:

Linux-01:
hci0: Type: USB
      BD Address: 00:0A:3A:62:E5:A5 ACL MTU: 377:10 SCO MTU: 16:0
      UP RUNNING PSCAN ISCAN
      RX bytes:420 acl:0 sco:0 events:23 errors:0
      TX bytes:585 acl:0 sco:0 commands:23 errors:0
      Features: 0xff 0xfe 0x0d 0x38 0x08 0x08 0x00 0x00
      Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
      Link policy: RSWITCH HOLD SNIFF PARK
      Link mode: SLAVE ACCEPT
      Name: 'Computer-04'
      Class: 0x120104
      Service Classes: Networking
      Device Class: Computer, Desktop workstation
      HCI Ver: 1.2 (0x2) HCI Rev: 0x0 LMP Ver: 1.2 (0x2) LMP Subver: 0x309
      Manufacturer: Broadcom Corporation (15)

Linux-02:
hci0: Type: USB
      BD Address: 00:0A:3A:62:E5:A9 ACL MTU: 377:10 SCO MTU: 16:0
      UP RUNNING PSCAN ISCAN
      RX bytes:372 acl:7 sco:0 events:27 errors:0
      TX bytes:437 acl:7 sco:0 commands:17 errors:0
      Features: 0xff 0xfe 0x0d 0x38 0x08 0x08 0x00 0x00
      Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
      Link policy: RSWITCH HOLD SNIFF PARK
      Link mode: SLAVE ACCEPT
      Name: 'Computer-01-0'
      Class: 0x120104
      Service Classes: Networking
      Device Class: Computer, Desktop workstation
      HCI Ver: 1.2 (0x2) HCI Rev: 0x0 LMP Ver: 1.2 (0x2) LMP Subver: 0x309
      Manufacturer: Broadcom Corporation (15)

Linux-03:
hci0: Type: USB
      BD Address: 00:0A:3A:62:E3:17 ACL MTU: 377:10 SCO MTU: 16:0
      UP RUNNING PSCAN ISCAN
      RX bytes:372 acl:0 sco:0 events:15 errors:0
      TX bytes:55 acl:0 sco:0 commands:15 errors:0
      Features: 0xff 0xfe 0x0d 0x38 0x08 0x08 0x00 0x00
      Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
      Link policy: RSWITCH HOLD SNIFF PARK
      Link mode: SLAVE ACCEPT
      Name: 'Broadcom BCM2035'
      Class: 0x000000
      Service Classes: Unspecified
      Device Class: Miscellaneous,
      HCI Ver: 1.2 (0x2) HCI Rev: 0x0 LMP Ver: 1.2 (0x2) LMP Subver: 0x309
      Manufacturer: Broadcom Corporation (15)

Linux-oldDongle:
hci0: Type: USB
      BD Address: 00:0A:3A:62:81:FA ACL MTU: 192:8 SCO MTU: 64:8
      UP RUNNING PSCAN ISCAN
      RX bytes:936 acl:19 sco:0 events:51 errors:0
      TX bytes:438 acl:20 sco:0 commands:21 errors:0
      Features: 0xff 0xff 0x0b 0x00 0x00 0x00 0x00 0x00
      Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
      Link policy: RSWITCH HOLD SNIFF PARK
      Link mode: SLAVE ACCEPT
      Name: 'Heba'
      Class: 0x020104
      Service Classes: Networking
      Device Class: Computer, Desktop workstation
      HCI Ver: 1.1 (0x1) HCI Rev: 0x33c LMP Ver: 1.1 (0x1) LMP Subver: 0x33c
      Manufacturer: Cambridge silicon radio (10)


The connections status at the time of failure to query is as follows:
Linux-01 is connected to all other machines
Linux-02 is connected to Linux-01 and Linux-oldDongle
Linux-03 is connected to all other machines
Linux-oldDongle is connected to all other machines

Linux-02 and Linux-03 are failing to query: "Device or Resource Busy"
and Linux-01 and Linux-oldDongle are querying, 
however they are only finding 1 machine each. 
All machines have maintained all their connections even if failing
to query.

Any insights you can give would be greatly appreciated.

Thanks,
Heba.








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