[Bluez-users] Can't connect RFCOMM socket

[Bluez-users] Can't connect RFCOMM socket

[soraberri]

Hi

First of all thanks again for your time, maybe this is another proof of 
my lack of basic knowledge, but I've trying a lot and can't get ride of 
this error (I know this error is in many mails arround the list, but I 
have not find the particular remedy for mine)

When I try:

  rfcomm connect rfcomm0 00:10:60:A5:8F:8A 5

I get:

Can't connect RFCOMM socket: Connection refused
___________

modules l2cap, rfcomm are already loaded.
I have not paired both devices before, I only worry about this when the 
pop-up PIN helper window claims for the PIN... but this time it doesn't 
happen ¿how should I pair before?

Regards,


This is the dump for the device running rfcomm connect:
______________________________________________________________
HCIDump - HCI packet analyzer ver 1.11
device: hci0 snap_len: 1028 filter: 0xffffffff
< HCI Command: Create Connection (0x01|0x0005) plen 13
   8A 8F A5 60 10 00 18 CC 02 00 00 00 01
 > HCI Event: Command Status (0x0f) plen 4
   00 01 05 04
 > HCI Event: Connect Complete (0x03) plen 11
   00 29 00 8A 8F A5 60 10 00 01 00
< ACL data: handle 0x0029 flags 0x02 dlen 12
     L2CAP(s): Connect req: psm 3 scid 0x0040
< HCI Command: Write Link Policy Settings (0x02|0x000d) plen 4
   29 00 0F 00
 > HCI Event: Number of Completed Packets (0x13) plen 5
   01 29 00 01 00
 > HCI Event: Command Complete (0x0e) plen 6
   01 0D 08 00 29 00
 > HCI Event: Page Scan Repetition Mode Change (0x20) plen 7
   8A 8F A5 60 10 00 01
 > HCI Event: Max Slots Change (0x1b) plen 3
   29 00 05
 > ACL data: handle 0x0029 flags 0x02 dlen 16
     L2CAP(s): Connect rsp: dcid 0x0040 scid 0x0040 result 0 status 0
< ACL data: handle 0x0029 flags 0x02 dlen 16
     L2CAP(s): Config req: dcid 0x0040 flags 0x0000 clen 4
     MTU 1024
 > HCI Event: Number of Completed Packets (0x13) plen 5
   01 29 00 01 00
 > ACL data: handle 0x0029 flags 0x02 dlen 14
     L2CAP(s): Config rsp: scid 0x0040 flags 0x0000 result 0 clen 0
 > ACL data: handle 0x0029 flags 0x02 dlen 16
     L2CAP(s): Config req: dcid 0x0040 flags 0x0000 clen 4
     MTU 1024
< ACL data: handle 0x0029 flags 0x02 dlen 14
     L2CAP(s): Config rsp: scid 0x0040 flags 0x0000 result 0 clen 0
< ACL data: handle 0x0029 flags 0x02 dlen 8
     L2CAP(d): cid 0x0040 len 4 [psm 3]
       RFCOMM(s): SABM: cr 1 dlci 0 pf 1 ilen 0 fcs 0x1c
 > HCI Event: Number of Completed Packets (0x13) plen 5
   01 29 00 01 00
 > HCI Event: Number of Completed Packets (0x13) plen 5
   01 29 00 01 00
 > ACL data: handle 0x0029 flags 0x02 dlen 8
     L2CAP(d): cid 0x0040 len 4 [psm 3]
       RFCOMM(s): UA: cr 1 dlci 0 pf 1 ilen 0 fcs 0xd7
< ACL data: handle 0x0029 flags 0x02 dlen 18
     L2CAP(d): cid 0x0040 len 14 [psm 3]
       RFCOMM(s): PN CMD: cr 1 dlci 0 pf 0 ilen 10 fcs 0x70 mcc_len 8
       dlci 10 frame_type 0 credit_flow 15 pri 7 ack_timer 0
       frame_size 1019 max_retrans 0 credits 7
 > HCI Event: Number of Completed Packets (0x13) plen 5
   01 29 00 01 00
 > ACL data: handle 0x0029 flags 0x02 dlen 8
     L2CAP(d): cid 0x0040 len 4 [psm 3]
       RFCOMM(s): DM: cr 1 dlci 10 pf 1 ilen 0 fcs 0xa6
< ACL data: handle 0x0029 flags 0x02 dlen 8
     L2CAP(d): cid 0x0040 len 4 [psm 3]
       RFCOMM(s): DISC: cr 1 dlci 0 pf 1 ilen 0 fcs 0xfd
< ACL data: handle 0x0029 flags 0x02 dlen 12
     L2CAP(s): Disconn req: dcid 0x0040 scid 0x0040
 > HCI Event: Number of Completed Packets (0x13) plen 5
   01 29 00 01 00
 > HCI Event: Number of Completed Packets (0x13) plen 5
   01 29 00 01 00
 > ACL data: handle 0x0029 flags 0x02 dlen 8
     L2CAP(d): cid 0x0040 len 4 [psm 3]
       RFCOMM(s): UA: cr 1 dlci 0 pf 1 ilen 0 fcs 0xd7
 > ACL data: handle 0x0029 flags 0x02 dlen 12
     L2CAP(s): Disconn rsp: dcid 0x0040 scid 0x0040
< HCI Command: Disconnect (0x01|0x0006) plen 3
   29 00 13
 > HCI Event: Command Status (0x0f) plen 4
   00 01 06 04
 > HCI Event: Disconn Complete (0x05) plen 4
   00 29 00 16

__________________________________________________________

and this is the dump for the remote device
________________________________________________________
HCIDump - HCI packet analyzer ver 1.11
device: hci0 snap_len: 1028 filter: 0xffffffff

 > HCI Event: Connect Request (0x04) plen 10

  AA 96 A5 60 10 00 04 01 12 01
< HCI Command: Accept Connection Request (0x01|0x0009) plen 7
  AA 96 A5 60 10 00 01

 > HCI Event: Command Status (0x0f) plen 4

  00 01 09 04

 > HCI Event: Connect Complete (0x03) plen 11

  00 29 00 AA 96 A5 60 10 00 01 00
< HCI Command: Write Link Policy Settings (0x02|0x000d) plen 4
  29 00 0F 00

 > HCI Event: Page Scan Repetition Mode Change (0x20) plen 7

  AA 96 A5 60 10 00 01

 > HCI Event: Command Complete (0x0e) plen 6

  01 0D 08 00 29 00
< HCI Command: Change Connection Packet Type (0x01|0x000f) plen 4
  29 00 18 CC

 > HCI Event: Max Slots Change (0x1b) plen 3

  29 00 05

 > HCI Event: Command Status (0x0f) plen 4

  00 01 0F 04

 > HCI Event: Connection Packet Type Changed (0x1d) plen 5

  00 29 00 18 CC

 > ACL data: handle 0x0029 flags 0x02 dlen 12

    L2CAP(s): Connect req: psm 3 scid 0x0040
< ACL data: handle 0x0029 flags 0x02 dlen 16
    L2CAP(s): Connect rsp: dcid 0x0040 scid 0x0040 result 0 status 0

 > HCI Event: Number of Completed Packets (0x13) plen 5

  01 29 00 01 00

 > ACL data: handle 0x0029 flags 0x02 dlen 16

    L2CAP(s): Config req: dcid 0x0040 flags 0x0000 clen 4
    MTU 1024
< ACL data: handle 0x0029 flags 0x02 dlen 14
    L2CAP(s): Config rsp: scid 0x0040 flags 0x0000 result 0 clen 0
< ACL data: handle 0x0029 flags 0x02 dlen 16
    L2CAP(s): Config req: dcid 0x0040 flags 0x0000 clen 4
    MTU 1024

 > HCI Event: Number of Completed Packets (0x13) plen 5

  01 29 00 01 00

 > HCI Event: Number of Completed Packets (0x13) plen 5

  01 29 00 01 00

 > ACL data: handle 0x0029 flags 0x02 dlen 14

    L2CAP(s): Config rsp: scid 0x0040 flags 0x0000 result 0 clen 0

 > ACL data: handle 0x0029 flags 0x02 dlen 8

    L2CAP(d): cid 0x0040 len 4 [psm 3]
      RFCOMM(s): SABM: cr 1 dlci 0 pf 1 ilen 0 fcs 0x1c
< ACL data: handle 0x0029 flags 0x02 dlen 8
    L2CAP(d): cid 0x0040 len 4 [psm 3]
      RFCOMM(s): UA: cr 1 dlci 0 pf 1 ilen 0 fcs 0xd7

 > HCI Event: Number of Completed Packets (0x13) plen 5

  01 29 00 01 00

 > ACL data: handle 0x0029 flags 0x02 dlen 18

    L2CAP(d): cid 0x0040 len 14 [psm 3]
      RFCOMM(s): PN CMD: cr 1 dlci 0 pf 0 ilen 10 fcs 0x70 mcc_len 8
      dlci 10 frame_type 0 credit_flow 15 pri 7 ack_timer 0
      frame_size 1019 max_retrans 0 credits 7
< ACL data: handle 0x0029 flags 0x02 dlen 8
    L2CAP(d): cid 0x0040 len 4 [psm 3]
      RFCOMM(s): DM: cr 1 dlci 10 pf 1 ilen 0 fcs 0xa6

 > HCI Event: Number of Completed Packets (0x13) plen 5

  01 29 00 01 00

 > ACL data: handle 0x0029 flags 0x02 dlen 8

    L2CAP(d): cid 0x0040 len 4 [psm 3]
      RFCOMM(s): DISC: cr 1 dlci 0 pf 1 ilen 0 fcs 0xfd
< ACL data: handle 0x0029 flags 0x02 dlen 8
    L2CAP(d): cid 0x0040 len 4 [psm 3]
      RFCOMM(s): UA: cr 1 dlci 0 pf 1 ilen 0 fcs 0xd7

 > ACL data: handle 0x0029 flags 0x02 dlen 12

    L2CAP(s): Disconn req: dcid 0x0040 scid 0x0040
< ACL data: handle 0x0029 flags 0x02 dlen 12
    L2CAP(s): Disconn rsp: dcid 0x0040 scid 0x0040

 > HCI Event: Number of Completed Packets (0x13) plen 5

  01 29 00 01 00

 > HCI Event: Number of Completed Packets (0x13) plen 5

  01 29 00 01 00

 > HCI Event: Disconn Complete (0x05) plen 4

  00 29 00 13



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Re: [Bluez-users] Can't connect RFCOMM socket

[Marcel Holtmann]

Hi,

> First of all thanks again for your time, maybe this is another proof of 
> my lack of basic knowledge, but I've trying a lot and can't get ride of 
> this error (I know this error is in many mails arround the list, but I 
> have not find the particular remedy for mine)
> 
> When I try:
> 
>   rfcomm connect rfcomm0 00:10:60:A5:8F:8A 5
> 
> I get:
> 
> Can't connect RFCOMM socket: Connection refused

the dump shows that there is no service running on RFCOMM channel on the
other side.

Regards

Marcel




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Re: [Bluez-users] Can't connect RFCOMM socket

[Filipa Duarte]

Hi everyone,

Marcel, many thanks for your help, but I still
couldn't connect to my friend PC. So I decided to
connect to a mobile phone first. It is an Sony
Ericsson Z600.

The 'hcitool scan' shows me the phone and the phone
also recognize my laptop. After this, I did a 'rfcomm
bind' on the laptop.

When I try to connect the mobile phone to my laptop,
the mobile phone asks me the passkey. When I
introduced the PIN (the same I have defined in the
/etc/bluetooth/pin) the reply on the phone is 'passkey
mismatch'.

Here is the output of the 'hcidump -X':
HCIDump - HCI packet analyzer ver 1.16
device: hci0 snap_len: 1028 filter: 0xffffffff
> HCI Event: Connect Request (0x04) plen 10
  0000: b4 db c9 d9 0a 00 04 02  52 01      ........R.
< HCI Command: Accept Connection Request (0x01|0x0009)
plen 7
  0000: b4 db c9 d9 0a 00 01                .......
> HCI Event: Command Status (0x0f) plen 4
  0000: 00 01 09 04                         ....
> HCI Event: PIN code Request (0x16)plen6
  0000: b4 db c9 d9 0a 00                   ......
< HCI Command: PIN Code Request Reply (0x01|0x000d)
plen 23
  0000: b4 db c9 d9 0a 00 05 42  6c 75 65 5a 00 00 00
00          .......BlueZ....
  0010: 00 00 00 00 00 00 00                .......
> HCI Event: Command Complete (0x0e) plen 10
  0000: 01 0d 04 00 b4 db c9 d9  0a 00      ..........
< HCI Command: PIN Code Request Reply (0x01|0x000d)
plen 23
  0000: b4 db c9 d9 0a 00 05 42  6c 75 65 5a 00 00 00
00          .......BlueZ....
  0010: 00 00 00 00 00 00 00                .......
> HCI Event: Command Complete (0x0e) plen 10
  0000: 01 0d 04 00 b4 db c9 d9  0a 00      ..........
> HCI Event: Connect Complete (0x03) plen 11
  0000: 05 29 00 b4 db c9 d9 0a  00 01 00  
.).........

Could you please help me with this output? I am not
sure what it means, if the PIN helper is working or
not...

If it is not the PIN helper, could you give any
directions to look for the problem?

Many thanks. Regards,

Filipa

--- Marcel Holtmann <marcel@holtmann.org> wrote:

> Hi Filipa,
> 
> > I am have Linux 2.6.9 in my laptop and an
> Conceptronic
> > CBT 100U USB adapter. I installed bluez-utils-2.14
> and
> > bluez-libs-2.14.
> > 
> > 'hciconfig -a' shows me my device and 'hcitool
> scan'
> > show me the computer of a friend (a windows pc). I
> can
> > do an 'l2ping' and an 'rfcomm bind' to this
> computer
> > without any problem. 
> > 
> > The problems arrive when I try to do 'rfcomm
> connect'.
> > The answer is: "Can't connect RFCOMM socket:
> resource
> > temporarily unavailable". 
> 
> you can't use bind and connect together. Choose one.
> 
> > I saw on the web and on the mailling lists that
> there
> > is a problem with the 'bluepin'. I checked mine
> and it
> > didn't work. So, I created a new file (called pin
> in 
> > /usr/bin/) with:
> > 
> > #!bin/sh
> > # file: /usr/bin/pin
> > echo -n "PIN: "
> > cat /etc/bluetooth/pin
> > 
> > and created a file in /etc/bluetooth/ also called
> pin
> > with a numerical the PIN code.
> > 
> > Still I could not make the 'rfcomm connect' work!
> It
> > appears a window asking for the PIN in my friend's
> > computer, but in my computer I still have the same
> > answer.
> 
> Check with "hcidump -x" as root if it is really a
> PIN helper problem.
> 
> Regards
> 
> Marcel
> 
> 
> 
> 
>
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Re: [Bluez-users] Can't connect RFCOMM socket

[Marcel Holtmann]

Hi Filipa,

> Marcel, many thanks for your help, but I still
> couldn't connect to my friend PC. So I decided to
> connect to a mobile phone first. It is an Sony
> Ericsson Z600.
> 
> The 'hcitool scan' shows me the phone and the phone
> also recognize my laptop. After this, I did a 'rfcomm
> bind' on the laptop.
> 
> When I try to connect the mobile phone to my laptop,
> the mobile phone asks me the passkey. When I
> introduced the PIN (the same I have defined in the
> /etc/bluetooth/pin) the reply on the phone is 'passkey
> mismatch'.
> 
> Here is the output of the 'hcidump -X':
> HCIDump - HCI packet analyzer ver 1.16
> device: hci0 snap_len: 1028 filter: 0xffffffff
> > HCI Event: Connect Request (0x04) plen 10
>   0000: b4 db c9 d9 0a 00 04 02  52 01      ........R.
> < HCI Command: Accept Connection Request (0x01|0x0009)
> plen 7
>   0000: b4 db c9 d9 0a 00 01                .......
> > HCI Event: Command Status (0x0f) plen 4
>   0000: 00 01 09 04                         ....
> > HCI Event: PIN code Request (0x16)plen6
>   0000: b4 db c9 d9 0a 00                   ......
> < HCI Command: PIN Code Request Reply (0x01|0x000d)
> plen 23
>   0000: b4 db c9 d9 0a 00 05 42  6c 75 65 5a 00 00 00
> 00          .......BlueZ....
>   0010: 00 00 00 00 00 00 00                .......
> > HCI Event: Command Complete (0x0e) plen 10
>   0000: 01 0d 04 00 b4 db c9 d9  0a 00      ..........
> < HCI Command: PIN Code Request Reply (0x01|0x000d)
> plen 23
>   0000: b4 db c9 d9 0a 00 05 42  6c 75 65 5a 00 00 00
> 00          .......BlueZ....
>   0010: 00 00 00 00 00 00 00                .......
> > HCI Event: Command Complete (0x0e) plen 10
>   0000: 01 0d 04 00 b4 db c9 d9  0a 00      ..........
> > HCI Event: Connect Complete (0x03) plen 11
>   0000: 05 29 00 b4 db c9 d9 0a  00 01 00  
> .).........
> 
> Could you please help me with this output? I am not
> sure what it means, if the PIN helper is working or
> not...
> 
> If it is not the PIN helper, could you give any
> directions to look for the problem?

it looks like you have two instances of hcid running. This is bad. Kill
one and make sure that you restart the other one. The PIN you have to
enter in your phone is "BlueZ" according to this log.

Regards

Marcel




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[Bluez-users] Can't connect RFCOMM socket

[Matt]

[-- Attachment #1.1: Type: text/plain, Size: 1994 bytes --]

Hi,

                    I am using bluez-utils-3.28 and am trying to connect to
a Nokia phone from my PC which has a BT dongle.I run hcid .I scan for other
devies using hcitool scan..and connect to my Phone using....

$hcid &
$passkey-agent --default 0000 &
$ hcitool scan
$ rfcomm connect 0 00:0E:6D:E0:E5:13 1

The Phone asks for the pin . I enter "0000" as the PIN .After sometime I get
the error message
Can't connect RFCOMM socket: Resource temporarily unavailable.

hcidump shows that (After I enter the PIN on the phone )

> HCI Event: PIN Code Request (0x16) plen 6
< ACL data: handle 1 flags 0x02 dlen 8
    L2CAP(d): cid 0x0064 len 4 [psm 3]
      RFCOMM(s): DISC: cr 1 dlci 2 pf 1 ilen 0 fcs 0xb8
< ACL data: handle 1 flags 0x02 dlen 8
    L2CAP(d): cid 0x0064 len 4 [psm 3]
      RFCOMM(s): DISC: cr 1 dlci 0 pf 1 ilen 0 fcs 0xfd
< ACL data: handle 1 flags 0x02 dlen 12
    L2CAP(s): Disconn req: dcid 0x0064 scid 0x0040
> HCI Event: Number of Completed Packets (0x13) plen 5
> HCI Event: Number of Completed Packets (0x13) plen 5
> HCI Event: Number of Completed Packets (0x13) plen 5
> ACL data: handle 1 flags 0x02 dlen 8
    L2CAP(d): cid 0x0040 len 4 [psm 3]
      RFCOMM(s): UA: cr 1 dlci 2 pf 1 ilen 0 fcs 0x92
> ACL data: handle 1 flags 0x02 dlen 8
    L2CAP(d): cid 0x0040 len 4 [psm 3]
      RFCOMM(s): UA: cr 1 dlci 0 pf 1 ilen 0 fcs 0xd7
> ACL data: handle 1 flags 0x02 dlen 12
    L2CAP(s): Disconn rsp: dcid 0x0064 scid 0x0040
< HCI Command: Disconnect (0x01|0x0006) plen 3
> HCI Event: Command Status (0x0f) plen 4
> HCI Event: Disconn Complete (0x05) plen 4

        I tried after removing the link keys
(/var/lib/bluetooth/XX:XX:XX:XX:XX:XX/) .Still I get the same error..What
could be the problem here..?
       When I try the same thing with a PC with Fedora Core5 (without the
latest bluez and passkey-agent), I am asked to enter the PIN when I enter it
on the phone and the connection is successful..

Thank you for your time and consideration,
regards,
Matt.

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