Re: GSM modem via Bluetooth?

[Dan Williams <dcbw redhat com>]

On Sat, 2010-11-20 at 23:28 +0300, Andrey Borzenkov wrote:
> On Sat, Nov 20, 2010 at 1:24 AM, Dan Williams <dcbw redhat com> wrote:
> > On Thu, 2010-11-04 at 15:33 +0300, Andrey Borzenkov wrote:
> >> I have Nokia E51 and am using KDE with bluedevil; Modemmanager 0.4 and
> >> NM 0.8.2-rc1. I can browse phone and transfer files, but modemmanager
> >> does not display any available device when BT is activated. Is it
> >> supposed to work at all and if yes, what is requires to get it
> >> working? Pointers to documentation is appreciated. Thank you!
> >
> > Getting this working first requires adding a "connection" for the
> > device, since we can't scan for it.  Once the connection is added and
> > known to NM, it'll show up in the menu and you can choose it.  While it
> > doesn't help you immediately with bluedevil, this is how we did the
> > gnome side of things:
> >
> > http://blogs.gnome.org/dcbw/2009/07/10/unwire-with-networkmanager/
> >
> 
> Yes, I know this but it does not really help to make it running using
> "Bordmittel".
> 
> OK, I have phone that exports DUN:
> 
> {pts/1}% sdptool search DUN
> Inquiring ...
> Searching for DUN on 00:24:03:BE:1A:29 ...
> Service Name: Dial-Up Networking
> Service RecHandle: 0x100c5
> Service Class ID List:
>   "Dialup Networking" (0x1103)
> Protocol Descriptor List:
>   "L2CAP" (0x0100)
>   "RFCOMM" (0x0003)
>     Channel: 4
> Language Base Attr List:
>   code_ISO639: 0x454e
>   encoding:    0x6a
>   base_offset: 0x100
> Profile Descriptor List:
>   "Dialup Networking" (0x1103)
>     Version: 0x0100
> 
> As I understand, I need serial port that is used by ModemManager. I
> now create serial port for the phone:
> 
> {pts/0}% sudo rfcomm bind 00:24:03:BE:1A:29 4
> {pts/0}% ll /dev/rfcomm0
> crw-rw---- 1 root dialout 216, 0 Ноя 20 23:22 /dev/rfcomm0
> 
> But this port is ignored by ModemManager:
> 
> {pts/0}% dbus-send --print-reply --system
> --dest=org.freedesktop.ModemManager /org/freedesktop/ModemManager
> org.freedesktop.ModemManager.EnumerateDevices
> method return sender=:1.10 -> dest=:1.315 reply_serial=2
>    array [
>    ]
> 
> So what is missing in this case? Thank you!

You don't actually need to create the rfcomm port yourself.  NM will
create that on-the-fly when starting up DUN for the device.  Since we
cannot scan for devices with Bluetooth (takes way too long and
interrupts existing connections) NM requires that a 'connection' already
be defined for a phone before you can use it; that connection stores
various config we want to know before connecting (like the BT address!).

Here's how it works for GNOME desktops:

http://blogs.gnome.org/dcbw/2009/07/10/unwire-with-networkmanager/

Dan