[Bug 172823] Re: PAN NAP not working on Ubuntu Gutsy

[TJ]

I'm trying to solve a similar issue. I did want to use the NAP profile
but so far I'm not too clear on if/how that is possible using the Gnome
Bluetooth Manager and/or the Ubuntu configuration. My issue is, getting
a mobile telephone to do the DHCP request on the PAN so the telephone
can use the PC and its Internet link as the Internet gateway rather than
using the (relatively expensive) 3G connection when
updating/installing/testing applications on the telephone.

The documentation at http://wiki.bluez.org/wiki/Network and in
particular the comments in the example /etc/bluetooth/network.conf show
the defaults:

# Network interface name for PANU for connections. default:bnep%d
# Network Interface name for Group Network server. default:pan0
# Network Interface name for Network Access Point server. default:pan1

When enabling "Network service" in Gnome Bluetooth Preferences applet,
pan0 (adhoc-network) becomes available.

I configured it in /etc/network/interfaces:

iface pan0 inet static
        address 10.254.2.254
        netmask 255.255.255.0
        pre-up /etc/init.d/dnsmasq restart
        up iptables -t nat -A POSTROUTING -o pan0 -j MASQUERADE
        down iptables -t nat -D POSTROUTING -o pan0 -j MASQUERADE

I'm using dnsmasq to provide DHCP/DNS for tun/tap interfaces so I added
a range to /etc/dnsmasq.conf

# egrep -v '^#|^$' /etc/dnsmasq.conf
user=nobody
interface=kvm0
interface=pan0
domain=lan.domain.net
dhcp-range=kvm,10.254.1.1,10.254.1.253,255.255.255.0,10.254.1.255,8h
dhcp-range=pan,10.254.2.1,10.254.2.253,255.255.255.0,10.254.2.255,8h

# ifup pan0
Restarting DNS forwarder and DHCP server: dnsmasq.
# ifconfig pan0
pan0      Link encap:Ethernet  HWaddr 00:00:00:00:00:00  
          inet addr:10.254.2.254  Bcast:10.254.2.255  Mask:255.255.255.0
          inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:145 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:29934 (29.2 KB)

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PAN NAP not working on Ubuntu Gutsy
https://bugs.launchpad.net/bugs/172823
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