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Re: [libvirt] [PATCH v3 11/14] Core driver implementation with ebtables support




"Daniel P. Berrange" <berrange redhat com> wrote on 03/25/2010 11:49:05 AM:

> Please respond to "Daniel P. Berrange"

>
> On Tue, Mar 23, 2010 at 10:54:17AM -0400, stefanb us ibm com wrote:
> > +/*
> > +    char macaddr[VIR_MAC_STRING_BUFLEN],
> > +         ipaddr[INET_ADDRSTRLEN],
> > +         number[20];
> > +    char chain[MAX_CHAINNAME_LENGTH];
> > +    virBuffer buf = VIR_BUFFER_INITIALIZER;
> > +
> > +    if (nwfilter->chainsuffix == VIR_NWFILTER_CHAINSUFFIX_ROOT)
> > +        PRINT_ROOT_CHAIN(chain, chainPrefix, ifname);
> > +    else
> > +        PRINT_CHAIN(chain, chainPrefix, ifname,
> > +                    virNWFilterChainSuffixTypeToString
> (nwfilter->chainsuffix));
>
> Since we're passing this into the shell, I think we should do paranoid
> validation on the 'chain' and 'ifname' fields, since they ultimately come
> from the user specified XML. Validate that it only contains a-Z, 0-0, -, _


Actually the user specified XML only currently allows the chain names 'arp',
'ipv4', 'ipv6' and 'root'. Others will already be rejected when parsing the filter.

With the interface names I was assuming that at the point where this part here
gets called is already well after the establishment of tap interfaces and the
net->ifname contains valid values otherwise the creation of the tap or macvtap
would have blown earlier.

>
>
> It would also be nice to put a variety of XML files in a tests/nwfilterdata
> directory and making a test suite to run the parser API against them, as
> well as adding some real world examples in the examples/nwfilter directory
> for end users to start from.


In the v4 patch series I am adding filters to examples/xml/nwfilter that are
automatically copied to /etc/libvirt/nwfilter for libvirt to pick up.

Gerhard has written a couple of test cases but they are for the external
test suite from what I know. So, yes, we'll add test cases over time.

  Regards,
    Stefan

>
> Regards,
> Daniel
> --
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