Re: [MirageOS-devel] mirage-www on xen and networking (on ARM)

[David Scott <scott.dj@xxxxxxxxx>]

On Mon, Mar 30, 2015 at 10:11 PM, Magnus Therning <magnus@xxxxxxxxxxxx> wrote:

On Sun, Mar 29, 2015 at 09:00:27PM +0100, David Scott wrote:
> On Sun, Mar 29, 2015 at 7:52 PM, Magnus Therning <magnus@xxxxxxxxxxxx>
> wrote:
[...]
>> This time around I don't get anything in reply to my requests
>> though.
>
> This is probably because my debug suggestion removed the assert and
> probably confused the higher layers.

Indeed, I put back the assert statement, after the if, and started
getting the partial reply again.

> Unless I'm misreading this, I think it must be a bug in
> mirage-net-xen (the ethernet driver) misreading the ethernet frames
> somehow? Or perhaps the peer host is sending extra junk on the end
> of its IP packets but within the ethernet frames?
>
> What kind of network are you using?

It's a standard cable modem & router (Netgear). The cubietruck is
connected directly to the modem. I'm issuing the HTTP from a laptop,
and both a wireless and wired connection gives the same behaviour.

> I've filed this issue for now:
>
> https://github.com/mirage/mirage-net-xen/issues/24

Excellent. Let me know if there's something else I should try.

I was planning on capturing some traffic from a third system to see
what's actually on the network, but I don't think I'll find the time
to do that until towards the end of the week.

After a clean rebuild on my cubieboard, I'm getting the assertion failures too, which is good. I notice the assert that's failing was added relatively recently[1] in tcpip v2.2.3 so it's possible that it's simply highlighting an old bug in mirage-net-xen. The hunt continues...

Cheers,

Dave

[1]Âhttps://github.com/mirage/mirage-tcpip/commit/00ca58327682dd1363459ee570964aade0704b7c

Â

/M

--
Magnus Therning           OpenPGP: 0xAB4DFBA4
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  Â-- Hector Louis Berlioz

--

Dave Scott

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