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Re: [MirageOS-devel] Mirage OS 2.4 errors on install and mirage-skeleton build

On 5 May 2015 at 09:35, Anil Madhavapeddy <anil@xxxxxxxxxx> wrote:
> On 4 May 2015, at 14:50, Justin Cormack <justin@xxxxxxxxxxxxxxxxxxxxx> wrote:
>> I have sent a pull request to fix the requires root issue - it was
>> trying to bring the interface up which requires root, so long as it is
>> already up this is fine, I use:
>> sudo ip tuntap add dev tap0 mode tap user justin && sudo ip link set dev 
>> tap0 up
>> to create interfaces. The disappearing thing is the interface going
>> down again, it is not a persistence thing, as it is not actually
>> removed.
> This almost works for me, except that I still get a permissions error
> since the `set_up_and_running` ioctl call checks for IFF_MULTICAST and
> IFF_BROADCAST in addition to IFF_UP and IFF_RUNNING.  These aren't
> set when I create a persistent tun with `otun add tun10 tun`, but it
> shouldn't matter much if those aren't set.  Any particular reason that
> we need them?

Odd, I can't replicate that, in fact I can't create any interfaces
which don't have multicast and broadcast set. On the other hand,
IFF_UP is the only flag that actually matters at this point, so just
testing for that would be sufficient.


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