maemo.org - Talk - Network via USB

Hi, I've been a longtime reader since the Nokia 770 days. Finally took the plunge on the N810 a couple weeks ago.

I want to share my laptop's wifi internet connection with the tablet via the stock usb cable (I also have a usb otg cable I bought off of ebay, though I would prefer to do this via usb rather than usb-otg->ethernet adapter). This is for a couple reasons, firstly my laptop has an atheros card which has far greater range than the wifi chip in the n810 and secondly to decrease latency with VNC sessions and perhaps VNC without a dedicated router in between.

I've come across a lot of scattered information on this topic but from what I have been able to piece together I cannot get it working - this is most likely primarily because most of the old instructions are outdated.

I am running Diablo on a N810. I have a couple SD card backup copies of the OS so I am not worried about trashing an install.

Ok so on the host side I am running Ubuntu 9.04 Jaunty (x86).

Ubuntu /etc/network/interfaces file:

Code:

auto lo

iface lo inet loopback



# The primary network interface

auto eth0

#iface eth0 inet dhcp



allow-hotplug usb0



mapping hotplug

        script grep

        map usb0



iface usb0 inet static

       address 192.168.2.14

       netmask 255.255.255.0

       broadcast 192.168.2.255

#       up iptables -I INPUT 1 -s 192.168.2.15 -j ACCEPT

up iptables -t nat -A POSTROUTING -o eth0 -s 192.168.2.15 -j MASQUERADE

up echo 1 > /proc/sys/net/ipv4/ip_forward

down iptables -t nat -D POSTROUTING -o eth0 -s 192.168.2.15 -j MASQUERADE

down echo 0 > /proc/sys/net/ipv4/ip_forward





iface br3 inet dhcp

         hostname ash

         pre-up   echo     "Adding ethernet bridge between LAN and PAN"

         pre-up   ifconfig ath0 0.0.0.0

         pre-up   brctl    addbr br3

         pre-up   brctl    setfd br3 0

         pre-up   brctl    stp br3 off

         pre-up   brctl    addif br3 ath0         

         pre-down echo     "Removing ethernet bridge between LAN and PAN"

         post-down brctl    delif br3 ath0

         post-down brctl    delbr br3

         post-down ifdown ath0

         post-down ifup ath0

(ath0 is my wireless card)

Error msg:

Code:

$ sudo ifup usb0

SIOCSIFADDR: No such device

usb0: ERROR while getting interface flags: No such device

SIOCSIFNETMASK: No such device

SIOCSIFBRDADDR: No such device

usb0: ERROR while getting interface flags: No such device

usb0: ERROR while getting interface flags: No such device

Failed to bring up usb0.

Nokia N810
/etc/network/interfaces

Code:

auto lo

iface lo inet loopback

auto eth0

iface eth0 inet dhcp

auto usb0

iface usb0 inet static

        address 192.168.2.15

        netmask 255.255.255.0

        gateway 192.168.2.14

Error msg:

Code:

Nokia-N810-43-7:~# ifdown usb0

mc-disconnect[2548]: GLIB DEBUG default - checking MC status

mc-disconnect[2548]: GLIB DEBUG default - mission_control_get_presence: MC not running.

run-parts: /etc/network/if-post-down.d/zz_proxy_unset exited with return code 1

Nokia-N810-43-7:~# ifup usb0

run-parts: /etc/network/if-up.d/00_proxy_set exited with return code 1

I have installed libicd-network-dummy described in maemo bug #3306.

I can ping 192.168.2.15 (the tablet) from the tablet regardless of my connection. But not the laptop to the tablet at all. Also I see DUMMY, USB, and DEFAULT in the connections manager. I have the usb-otg-control applet installed with USB network device mode selected.

Anyway I'm not entirely sure where the problem is but obviously the connection is severed. I don't see anything on either end from lsusb. Any pointers from anyone that has got this working in Diablo would be appreciated. Thank you.