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



On 31 Mar 2015 00:05, "David Scott" <scott.dj@xxxxxxxxx> wrote:
>
>
>
> 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...

Ah, that's "good" news indeed. I'll try, but won't make any promises, to look a bit at it too. More as a learning exercise then with an aim to actually find and fix the issue :)

/M

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