Re: [RFC] meta ematch

[jamal <hadi@xxxxxxxxxx>]

On Sun, 2005-01-16 at 10:57, Thomas Graf wrote:

> The rvalue may also point to a metadata in the kernel. This gets
> useful when comparing dev against real dev or if nfmark, tcindex,
> you name it carries a ifindex for example. It would even be possible
> to compare two strings from userspace but that wouldn't make sense.
> The only difference between lvalue and rvalue is that the lvalue
> carries the operand.
> 

ok, more clarity.

> 
> > I am not sure iam following yet:
> > 
> > So in the case of indev, you would need to 
> > - get indev ifindex from skb
> > - get indev name from skb
> > - compare the two??
> >

Can you explain the above in context of indev = "eth0"? I am still not
sure i get it:

+     if (meta_get(skb, info, &meta->lvalue, &l_value) < 0 ||
+         meta_get(skb, info, &meta->rvalue, &r_value) < 0)
+             return 0;
+     r = meta_type_ops(&meta->lvalue)->compare(&l_value, &r_value);


cheers,
jamal