From mboxrd@z Thu Jan  1 00:00:00 1970
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Subject: Re: [Bluez-users] connecting 2 linux pc's
From: Marcel Holtmann <marcel@holtmann.org>
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Date: Mon, 28 Feb 2005 09:21:52 +0100

Hi Geert,

> After a long time trying, I still cannot connect
> 2 linux PC's together using usb-bluetooth sticks
> with rfcomm.
> 
> I'm using among others :
> knoppix 3.7 CD boot (bootoption knoppix26)
> debian PC (2.6.11-rc4-bk10 kernel, unstable dist)
> debian laptop (2.6.11-rc4 kernel, unstable dist)
> 
> All the modules like
> - hci_usb
> - rfcomm
> - bluetooth
> - l2cap
> are loaded either by the kernel (/etc/modules) or
> by hand using modprobe.
> 
> These command's are used to try to setup
> a connection :
> 
> hciconfig hci0 up
> sdptool add sp
> rfcomm bind 0 <bdaddr> 1
> rfcomm connect 0
> 
> While on the "receiving" debian laptop these command's
> were issued :
> 
> hciconfig hci0 up
> sdptool add sp
> rfcomm listen /dev/rfcomm0 1
> 
> To check connection I use cat/echo (or minicom)
> -> echo "hello world" > /dev/rfcomm0
> 
> This way I can connect to a pc with some proprietary OS,
> but I cannot build a connection between 2 linux pc's.
> 
> Yesterday I was able to start a connection between
> a debian PC and debian laptop but immedeatily after
> pressing the return button on the debian PC the
> laptop responded with (rfcomm listen /dev/rfcomm0) :
> 
>  Press control-c to disconnect
>  Disconnected
> 
> 
> It's probably one bit I have to toggle ;-)
> 
> Some settings in hcid.conf :
> pairing multi;
> lm accept;
> lp rswitch,hold,sniff,park;
> 
> My rfcomm.conf on the debian PC is
> modified like this :
> rfcomm0 {
>   bind yes;
>   device <bd-address of debian laptop connected BT dongle>;
>   channel 1;
> }
> 
> The service was restarted each time the config
> was altered with /etc/init.d/bluez-utils stop
> and then ..... start
> 
> In all the howto's/archives there is a lot of
> info how to connect to a phone or some device,
> but there's no info how to connect 2 pc's.
> Can anyone help ?

use real applications for the connection, like dund or pand. Or write
your RFCOMM handling by yourself. See rctest for an example.

Regards

Marcel




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