Re: bluetooth tethering to at&t phone issues

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On Fri, 15 Aug 2008, Xamindar wrote:

-> Does anyone know how to set up bluetooth pan the *new* way? As in not using
-> the old daemon? I searched the blues wiki and found that I need to create a
-> /etc/bluetooth/network.conf file but it fails to explain what to do after
-> that. All else I could find was dbus info on setting it up which suggests
-> there should he a program or script out there to do this. Does anyone know?

With pand? I'm not aware of an old daemon, just the current 'pand' that is 
still in the sources. The subject of this message talks of tethering, which is 
with rfcomm & pppd or dund calling pppd itself. I started to play around with 
the file called ppporc, too, but still not sure what it does exactly. Anyway, 
with pand you need to know the side of the connection you are on, and if the 
serving side, whether you want to do NAP or GN. I did write scripts for this, 
local - not meant for other systems but you can get an idea of from them. Hope 
this is what you meant, if not, maybe others can make use of the scripts at 
least.

(See files attached, 1-4)


An odd thing is, when I use --role NAP, I get the interface created under the 
[GN] block of the network.conf file. Yet the sdp record also says "NAP". The 
/etc/bluetooth/nap-service I start by hand; not sure if it would auto-exec if 
another pand client was looking for a NAP service.



network.conf

[General]
Disable=
DisableSecurity=false
Interface=hci0

[PANU Role]
Interface=bnep%d
Script=/etc/bluetooth/panu-client

[GN Role]
Interface=pan0
Script=/etc/bluetooth/nap-service

[NAP Role]
Interface=pan1
Script=/etc/bluetooth/nap-service




You'll need the bridge-utils for brctl, they're on sourceforge.net 
(http://bridge.sourceforge.net/). Some of the syntax is likely Zsh-specific, 
probably [ ${status} = "0" ] is. If re-writing for other shells you'll need a 
way to get the error codes of commands. I don't use these scripts a whole lot, 
so likely there are bugs; I leave the debugging to whomever. I saw an 
"RTnetlink answers: File exists" error today, but it's harmless. You'll also 
need something to handle pairing.


10: pan0: <BROADCAST,MULTICAST,DYNAMIC,UP,LOWER_UP> mtu 1500 qdisc noqueue 
state UNKNOWN
     link/ether e2:1a:fc:f3:45:9f brd ff:ff:ff:ff:ff:ff
     inet 192.168.20.1/24 brd 192.168.20.255 scope global pan0

Service Name: Network Access Point
Service Description: BlueZ PAN Service
Service Provider: BlueZ PAN
Service RecHandle: 0x10005
Service Class ID List:
   "Network Access Point" (0x1116)
Protocol Descriptor List:
   "L2CAP" (0x0100)
     PSM: 15
   "BNEP" (0x000f)
     Version: 0x0100
     SEQ16: 800 806
Language Base Attr List:
   code_ISO639: 0x656e
   encoding:    0x6a
   base_offset: 0x100
Profile Descriptor List:
   "Network Access Point" (0x1116)
     Version: 0x0100



Remove the bridge later:

ip link set pan0 down
brctl delbr pan0


-> Or is this a closely guarded secret that only the bluez devs know about?

Yes. And now that you know, you can't be allowed to leave here alive. ;)


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