[Bluez-users] rfcomm0: connection refused

[Bluez-users] rfcomm0: connection refused

[Virat Gohil]

 Hi All,

 I tried connecting to GPRS using my nokia 6820 and CSR usbdongle. I am able
to start hcid, sdpd.

 I am also able to l2ping my device.

 I can bind the device to rfcomm0, after patching the kernel

 I was able to connect to The Internet once, but after I restarted I got the
following error while connecting using pppd

 rfcomm0: connection refused!

 I thought may be I messed up a setting here or there, so I re-installed
RedHat 9.0 and tried again, I was able to conenct once, after I restart I
get the same problem. please help.

 The following is the output of hcidump:

 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 3 scid 0x0040
 < HCI Command: Write Link Policy Settings(0x02|0x000d) plen 4
 > HCI Event: Number of Completed Packets(0x13) plen 5
 > HCI Event: Command Complete(0x0e) plen 6
> HCI Event: Page Scan Repetition Mode Change(0x20) plen 7
 > HCI Event: Max Slots Change(0x1b) plen 3
 > 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
 > ACL data: handle 0x0029 flags 0x02 dlen 16
 L2CAP(s): Config req: dcid 0x0040 flags 0x0000 clen 4
 MTU 32772
 < ACL data: handle 0x0029 flags 0x02 dlen 14
 L2CAP(s): Config rsp: scid 0x0040 flags 0x0000 result 0 clen 0
 > HCI Event: Number of Completed Packets(0x13) plen 5
 > HCI Event: Number of Completed Packets(0x13) plen 5
 > 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 0x40 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
 > ACL data: handle 0x0029 flags 0x02 dlen 8
 L2CAP(d): cid 0x40 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 0x40 len 14 [psm 3]
 RFCOMM(s): PN CMD: cr 1 dlci 0 pf 0 ilen 10 fcs 0x70 mcc_len 8
 dlci 2 frame_type 0 credit_flow 15 pri 0 ack_timer 0 frame_size 1019
 max_retrans 0 credits 7
 > HCI Event: Number of Completed Packets(0x13) plen 5
 > ACL data: handle 0x0029 flags 0x02 dlen 18
 L2CAP(d): cid 0x40 len 14 [psm 3]
 RFCOMM(s): PN RSP: cr 0 dlci 0 pf 0 ilen 10 fcs 0xaa mcc_len 8
 dlci 2 frame_type 0 credit_flow 14 pri 0 ack_timer 0 frame_size 324
 max_retrans 0 credits 0
 < ACL data: handle 0x0029 flags 0x02 dlen 8
 L2CAP(d): cid 0x40 len 4 [psm 3]
 RFCOMM(s): SABM: cr 1 dlci 2 pf 1 ilen 0 fcs 0x59
 > HCI Event: Number of Completed Packets(0x13) plen 5
 > HCI Event: Link Key Request(0x17) plen 6
 < HCI Command: Link Key Request Reply(0x01|0x000b) plen 22
 > HCI Event: Command Complete(0x0e) plen 10
 > ACL data: handle 0x0029 flags 0x02 dlen 8
 L2CAP(d): cid 0x40 len 4 [psm 3]
 RFCOMM(s): DM: cr 1 dlci 2 pf 1 ilen 0 fcs 0x73
 < ACL data: handle 0x0029 flags 0x02 dlen 8
 L2CAP(d): cid 0x40 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
> HCI Event: Number of Completed Packets(0x13) plen 5
 > ACL data: handle 0x0029 flags 0x02 dlen 8
 L2CAP(d): cid 0x40 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
 > HCI Event: Command Status(0x0f) plen 4
 > HCI Event: Disconn Complete(0x05) plen 4

 Thank You, and all the people who have contributed in the development of
 bluez!!

 Virat




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Re: [Bluez-users] rfcomm0: connection refused

[Marcel Holtmann]

Hi Virat,

>  I tried connecting to GPRS using my nokia 6820 and CSR usbdongle. I am able
> to start hcid, sdpd.
> 
>  I am also able to l2ping my device.
> 
>  I can bind the device to rfcomm0, after patching the kernel

about what patch are you talking? What kernel do you use?

>  I was able to connect to The Internet once, but after I restarted I got the
> following error while connecting using pppd
> 
>  rfcomm0: connection refused!

This can be a PIN problem or you use the wrong RFCOMM channel number.
Check the channel number of DUN with sdptool first.

>  I thought may be I messed up a setting here or there, so I re-installed
> RedHat 9.0 and tried again, I was able to conenct once, after I restart I
> get the same problem. please help.
> 
>  The following is the output of hcidump:

Fix up your mailer. This messed up hcidump was hard to read.

Regards

Marcel




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Re: [Bluez-users] rfcomm0: connection refused

[Marcel Holtmann]

Hi Virat,

> > about what patch are you talking? What kernel do you use?
> 
> I am using 2.4.20-8 which comes with RedHat Linux 9.0

not really good. Better you use 2.4.26-mh1.

> > This can be a PIN problem or you use the wrong RFCOMM channel number.
> > Check the channel number of DUN with sdptool first.
> 
> I dont think so, as I was able to connect once, and then it failed after
> restart and without me making any changes.

Check it with "sdptool browse <bdaddr>". What does "hciconfig -a" say?

> > Fix up your mailer. This messed up hcidump was hard to read.
> 
> I am attaching a text file with the hcidump with this mail, hope you wont
> mind that.

Use the suffix *.txt so I can view it inline in my mailer.

Regards

Marcel




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Re: [Bluez-users] rfcomm0: connection refused

[Marcel Holtmann]

Hi Virat,

> > not really good. Better you use 2.4.26-mh1.
> 
> sorry, but I dont know much about kernel, my question is can I use
> 2.4.26-mh1 patch on 2.4.20 series kernel or shall I download the source for
> 2.4.26 series and then apply the patch that you suggested?

take a look at www.kernelnewbies.org for kernel FAQ etc. Anyhow the
patch-2.4.26-mh1 is as the name indicates for Linux kernel 2.4.26. You
have to choose another one, but these patches only apply to a vanilla
kernel from www.kernel.org and not the RedHat specific kernels.

> > > > This can be a PIN problem or you use the wrong RFCOMM channel number.
> > > > Check the channel number of DUN with sdptool first.
> > >
> > > I dont think so, as I was able to connect once, and then it failed after
> > > restart and without me making any changes.
> >
> > Check it with "sdptool browse <bdaddr>". What does "hciconfig -a" say?
> 
> I am attaching the output of "sdptool browse" and hciconfig -a and the
> hcidump with this mail. Thanks again

Maybe you have initiated a pairing between phone and PC, but the phone
didn't save the link key. Make sure that you accept a new pairing on the
phone and that you also store it. Check the list of paired devices.

Regards

Marcel




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Re: [Bluez-users] rfcomm0: connection refused

[Marcel Holtmann]

Hi Virat,

> > Maybe you have initiated a pairing between phone and PC, but the phone
> > didn't save the link key. Make sure that you accept a new pairing on the
> > phone and that you also store it. Check the list of paired devices.
> 
> The phone is already paired with the PC once, and I have my pc's name as
> matrix on my phone's paired devices list as matrix although my Linux's
> hostname is localhost, could this be a problem, my windoz hostname is
> matrix.

the hostname doesn't matter, but if you dual-boot your machine then you
always have to pair again.

Regards

Marcel




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Re: [Bluez-users] rfcomm0: connection refused

[Marcel Holtmann]

Hi Virat,

> > the hostname doesn't matter, but if you dual-boot your machine then you
> > always have to pair again.
> 
> it asked me to pair once, I did pair, then after restart whenever I try to
> connect my phone says invalid passcode and my pc says connection refused! my
> phone no longer asks me for pairing under Linux.
> 
> will play around a  bit longer with the new kernel that you suggested, going
> thru patch howto and kernel docs currently. I am enjoying this.

may the new kernel helps, but I think it is a phone related problem.

Regards

Marcel




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[Bluez-users] rfcomm0: connection refused

[Virat Gohil]

 > Hi Virat,
 >
 > > > the hostname doesn't matter, but if you dual-boot your machine then
you
 > > > always have to pair again.

 > > it asked me to pair once, I did pair, then after restart whenever I try
to
 > > connect my phone says invalid passcode and my pc says connection
refused! my
 > > phone no longer asks me for pairing under Linux.
 > >
 > > will play around a  bit longer with the new kernel that you suggested,
going
 > > thru patch howto and kernel docs currently. I am enjoying this.
 >
 > may the new kernel helps, but I think it is a phone related problem.
 >
 > Regards
 >
 > Marcel

 Thanks for all your help, the problem was not on my m/c or Linux, it was on
my phone, it automatically tried to connect and did not ask me PIN, so now
what I  do is every time I start Linux, I  delete the paired device (my PC),
everytime I start windoj it automatically asks me for  PIN. now I can surf
The Internet on Linux  my fav. OS.

 btw, I am using Nokia 6820.

 Thanks once again.

 Virat





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