[poky] QEMU networking

[Joshua Lock]

On Thu, 2011-05-12 at 10:10 -0600, Gary Thomas wrote:
> I'm having a devil of a time getting networking to work when
> I run qemu (a Poky derived image, of course!)  I'm running this
> on a box which itself is NAT'd to the real internet, like this:
> 
>     +-------------+        +------------------+
>     |   QEMUarm   |<------>|   My_Desktop     |<----> Internet
>     | 192.168.7.2 |        |   192.168.7.1    |
>     +-------------+        |   192.168.1.125  |
>                            +------------------+
> 
> Firstly, something is messing with the routing tables over time
> and I can't get past the first hop.  If I reconfigure the network
> on the QEMU system like this:
>    # ifconfig eth0 down
>    # ifconfig eth0 up
>    # route add default gw 192.168.7.1
> I can then access past "My_Desktop", e.g.
>    # ping 192.168.1.101
>       -or-
>    # ping 74.125.225.19    (www.google.com)
> This works fine and the routing table (route.good) is correct.
> 
> A little while later (minutes), the routing changes and now I can't
> get past 'My_Desktop' (i.e. I can ping 192.168.1.125, but not 192.168.1.101)
> The routing table has changed (route.bad)
> 
> What causes this?  I don't have avahi running anywhere and I've explicitly
> disabled that daemon on the QEMU system.
> 
> Finally, there seems to be no name resolution - /etc/resolv.conf comes
> up as:
>    nameserver 127.0.0.1
> If I want to resolve any real names, I have to update it manually.
> 
> Note: I'm running core-image-sato with web-webkit added using zypper.

I suspect ConnMan may have something to do with it. Though that's only a
suspicion based on some past experience.

Cheers,
Joshua
-- 
Joshua Lock
        Yocto Project Build Monkey
        Intel Open Source Technology Centre