[Bluez-users] Network Access Point - pairing problem

[Bluez-users] Network Access Point - pairing problem

[D.W.]

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Hello,

I want to use bluez for a standalone network access point. All works fine(pand or dund), the thing is that the pairing doesn't work at first contact (client is a windows-pc). 

So I have to establish a rfcomm-connection manually(from the server side rfcomm connect 0 btad) first. This pairing works,  I disconnect and then I am able to connect the client to the NAT.

Does anybody know what's wrong and what I can do to make the pairing work without this manually initiated rfcomm-connnection ?

Thanks in advance,

Daniel



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Re: [Bluez-users] Network Access Point - pairing problem

[Marcel Holtmann]

Hi Daniel,

> I want to use bluez for a standalone network access point. All works
> fine(pand or dund), the thing is that the pairing doesn't work at
> first contact (client is a windows-pc). 
> 
> So I have to establish a rfcomm-connection manually(from the server
> side rfcomm connect 0 btad) first. This pairing works,  I disconnect
> and then I am able to connect the client to the NAT.
> 
> Does anybody know what's wrong and what I can do to make the pairing
> work without this manually initiated rfcomm-connnection ?

are we talking about security mode 2 or security mode 3? What kernel do
you use?

Regards

Marcel




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[Bluez-users] Network Access Point - pairing problem

[D.W.]

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Hi Marcel,
Thank you for your reply.
I use kernel 2.4.22 on an axis devboard82. The bluez stack is not the latest(PAN, SDP, utils, libs are still seperate packages), because I had problems porting later versions to the devboard.
But except the pairing problem at first contact it works perfectly.
Except the PIN (it's a static one at server side) there is no further authentification necessary.
Security mode 2 or 3? What do you mean? Can I check it?
When I try to connect to the server at first contact, I have to enter the PIN(client side) and after entering the right pin I get the message :"Authentification failed." 
Regards Daniel


 
> Hi Daniel,
> 
> > I want to use bluez for a standalone network access point. All works
> > fine(pand or dund), the thing is that the pairing doesn't work at
> > first contact (client is a windows-pc). 
> > 
> > So I have to establish a rfcomm-connection manually(from the server
> > side rfcomm connect 0 btad) first. This pairing works,  I disconnect
> > and then I am able to connect the client to the NAT.
> > 
> > Does anybody know what's wrong and what I can do to make the pairing
> > work without this manually initiated rfcomm-connnection ?
> 
> are we talking about security mode 2 or security mode 3? What kernel do
> you use?
> 
> Regards
> 
> Marcel
> 
> 

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Re: [Bluez-users] Network Access Point - pairing problem

[Marcel Holtmann]

Hi Daniel,

> I use kernel 2.4.22 on an axis devboard82. The bluez stack is not the
> latest(PAN, SDP, utils, libs are still seperate packages), because I
> had problems porting later versions to the devboard.

you use a version where many fixes are missing.

> But except the pairing problem at first contact it works perfectly.
> Except the PIN (it's a static one at server side) there is no further
> authentification necessary.
> Security mode 2 or 3? What do you mean? Can I check it?

What does "hciconfig -a" say?

> When I try to connect to the server at first contact, I have to enter
> the PIN(client side) and after entering the right pin I get the
> message :"Authentification failed." 

Run "hcidump -x" and we can see what really happens.

Regards

Marcel




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[Bluez-users] Network Access Point - pairing problem

[D.W.]

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Hi Marcel,
this is the output when I execute hciconfig -a.
hci0:	Type: USB 
	BD Address: 00:02:5B:01:21:14 ACL MTU: 192:8  SCO MTU: 64:8
	UP RUNNING PSCAN ISCAN 
	RX bytes:936 acl:0 sco:0 events:23 errors:0
	TX bytes:327 acl:0 sco:0 commands:22 errors:0
	Features: 0xff 0xff 0x0f 0x00
	Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3 
	Link policy: HOLD SNIFF PARK 
	Link mode: ACCEPT MASTER 
	Name: 'BlueZ (0)'
	Class: 0x000100
	Service Classes: Unspecified
	Device Class: Computer, Uncategorized
	HCI Ver: 1.1 (0x1) HCI Rev: 0x110 LMP Ver: 1.1 (0x1) LMP Subver: 0x110
	Manufacturer: Cambridge Silicon Radio (10)



This is the output while trying to connect to the NAP at first contact:

HCIDump - HCI packet analyzer ver 1.5
device: hci0 snap_len: 1028 filter: 0xffffffff
> HCI Event: Connect Request(0x04) plen 10
  B0 3A 4C 3D 0F 00 04 01 52 01 
< HCI Command: Accept Connection Request(0x01|0x0009) plen 7
  B0 3A 4C 3D 0F 00 00 
> HCI Event: Command Status(0x0f) plen 4
  00 01 09 04 
> HCI Event: Role Change(0x12) plen 8
  00 B0 3A 4C 3D 0F 00 00 
> HCI Event: Connect Complete(0x03) plen 11
  00 28 00 B0 3A 4C 3D 0F 00 01 00 
< HCI Command: Write Link Policy Settings(0x02|0x000d) plen 4
  28 00 0E 00 
> HCI Event: Page Scan Repetition Mode Change(0x20) plen 7
  B0 3A 4C 3D 0F 00 01 
> HCI Event: Max Slots Change(0x1b) plen 3
  28 00 05 
> HCI Event: Command Complete(0x0e) plen 6
  01 0D 08 00 28 00 
< HCI Command: Change Connection Packet Type(0x01|0x000f) plen 4
  28 00 18 CC 
> HCI Event: Command Status(0x0f) plen 4
  00 01 0F 04 
> HCI Event: Connection Packet Type Changed(0x1d) plen 5
  00 28 00 18 CC 
> HCI Event: PIN Code Request(0x16) plen 6
  B0 3A 4C 3D 0F 00 
< HCI Command: PIN Code Request Reply(0x01|0x000d) plen 23
  B0 3A 4C 3D 0F 00 05 42 6C 75 65 5A 00 00 00 00 00 00 00 00 
  00 00 00 
> HCI Event: Command Complete(0x0e) plen 10
  01 0D 04 00 B0 3A 4C 3D 0F 00 
> HCI Event: Disconn Complete(0x05) plen 4
  00 28 00 05 

Regards Daniel



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Re: [Bluez-users] Network Access Point - pairing problem

[Marcel Holtmann]

Hi Daniel,

> this is the output when I execute hciconfig -a.
> hci0:	Type: USB 
> 	BD Address: 00:02:5B:01:21:14 ACL MTU: 192:8  SCO MTU: 64:8
> 	UP RUNNING PSCAN ISCAN 
> 	RX bytes:936 acl:0 sco:0 events:23 errors:0
> 	TX bytes:327 acl:0 sco:0 commands:22 errors:0
> 	Features: 0xff 0xff 0x0f 0x00
> 	Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3 
> 	Link policy: HOLD SNIFF PARK 
> 	Link mode: ACCEPT MASTER 
> 	Name: 'BlueZ (0)'
> 	Class: 0x000100
> 	Service Classes: Unspecified
> 	Device Class: Computer, Uncategorized
> 	HCI Ver: 1.1 (0x1) HCI Rev: 0x110 LMP Ver: 1.1 (0x1) LMP Subver: 0x110
> 	Manufacturer: Cambridge Silicon Radio (10)

you forcing a role switch (master role), but you aren't allowing it in
the link policy? Fix this.

> This is the output while trying to connect to the NAP at first contact:
> 
> HCIDump - HCI packet analyzer ver 1.5
> device: hci0 snap_len: 1028 filter: 0xffffffff
> > HCI Event: Connect Request(0x04) plen 10
>   B0 3A 4C 3D 0F 00 04 01 52 01 
> < HCI Command: Accept Connection Request(0x01|0x0009) plen 7
>   B0 3A 4C 3D 0F 00 00 
> > HCI Event: Command Status(0x0f) plen 4
>   00 01 09 04 
> > HCI Event: Role Change(0x12) plen 8
>   00 B0 3A 4C 3D 0F 00 00 
> > HCI Event: Connect Complete(0x03) plen 11
>   00 28 00 B0 3A 4C 3D 0F 00 01 00 
> < HCI Command: Write Link Policy Settings(0x02|0x000d) plen 4
>   28 00 0E 00 
> > HCI Event: Page Scan Repetition Mode Change(0x20) plen 7
>   B0 3A 4C 3D 0F 00 01 
> > HCI Event: Max Slots Change(0x1b) plen 3
>   28 00 05 
> > HCI Event: Command Complete(0x0e) plen 6
>   01 0D 08 00 28 00 
> < HCI Command: Change Connection Packet Type(0x01|0x000f) plen 4
>   28 00 18 CC 
> > HCI Event: Command Status(0x0f) plen 4
>   00 01 0F 04 
> > HCI Event: Connection Packet Type Changed(0x1d) plen 5
>   00 28 00 18 CC 
> > HCI Event: PIN Code Request(0x16) plen 6
>   B0 3A 4C 3D 0F 00 
> < HCI Command: PIN Code Request Reply(0x01|0x000d) plen 23
>   B0 3A 4C 3D 0F 00 05 42 6C 75 65 5A 00 00 00 00 00 00 00 00 
>   00 00 00 
> > HCI Event: Command Complete(0x0e) plen 10
>   01 0D 04 00 B0 3A 4C 3D 0F 00 
> > HCI Event: Disconn Complete(0x05) plen 4
>   00 28 00 05 

The PIN code you entered is simply wrong. Try "BlueZ".

Regards

Marcel




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[Bluez-users] Network Access Point - pairing problem

[D.W.]

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Hi Marcel,

it works perfectly now. Thank you very much for your help.
Where can I change this pin?
I assumed the pin is determined in hcid.conf.
Regards Daniel

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Re: [Bluez-users] Network Access Point - pairing problem

[Marcel Holtmann]

Hi Daniel,

> it works perfectly now. Thank you very much for your help.
> Where can I change this pin?
> I assumed the pin is determined in hcid.conf.

for incoming connections it is read from /etc/bluetooth/pin and you have
to restart hcid after that. Actually I like to change that and let hcid
always read the PIN from that file if needed. So patches are welcome.

Regards

Marcel




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Re: [Bluez-users] Network Access Point - pairing problem

[Jouni.Lohikoski@iki.fi]

Hi MH,

On Thu, Nov 04, 2004 at 12:05:32PM +0100, Marcel Holtmann wrote:
> > > HCI Event: PIN Code Request(0x16) plen 6
> >   B0 3A 4C 3D 0F 00 
> > < HCI Command: PIN Code Request Reply(0x01|0x000d) plen 23
> >   B0 3A 4C 3D 0F 00 05 42 6C 75 65 5A 00 00 00 00 00 00 00 00 
> >   00 00 00 
> 
> The PIN code you entered is simply wrong. Try "BlueZ".

btw, what and where is the tried PIN code in that hex dump? B0 3A 4C 3D 0F 00
is obviously Bluetooth address of the remote host, so somewhere here
is the PIN code "05 42 6C 75 65 5A 00 00 00 00 00 00 00 00 00 00 00",
but how it is encoded?

// jouni



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Re: [Bluez-users] Network Access Point - pairing problem

[Marcel Holtmann]

Hi Jouni,

> > > > HCI Event: PIN Code Request(0x16) plen 6
> > >   B0 3A 4C 3D 0F 00 
> > > < HCI Command: PIN Code Request Reply(0x01|0x000d) plen 23
> > >   B0 3A 4C 3D 0F 00 05 42 6C 75 65 5A 00 00 00 00 00 00 00 00 
> > >   00 00 00 
> > 
> > The PIN code you entered is simply wrong. Try "BlueZ".
> 
> btw, what and where is the tried PIN code in that hex dump? B0 3A 4C 3D 0F 00
> is obviously Bluetooth address of the remote host, so somewhere here
> is the PIN code "05 42 6C 75 65 5A 00 00 00 00 00 00 00 00 00 00 00",
> but how it is encoded?

you can use "hcidump -X" and you will see it. You can also read the
specification or think about what "05 42 6C 75 65 5A" maybe means ;)

Regards

Marcel




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