Re: [Fwd: [ANNOUNCE] Layer-7 Filter for Linux QoS]

[Ethan Sommer <sommere@xxxxxxxxxxx>]

Philippe Biondi wrote:

> regexp support was planned but not done yet. (if someone know where I can
> download more free time !).
>
> The implementation should not be that hard, once you have the compiler to
> transform the string describing the regexp to an automaton.
>
> Note that to respect the framework, you have to deal with multiple
> patterns (should not be that hard). If you have pat1 and pat2, searching
> for (pat1|pat2) is not sufficient because for each match, you have to
> point which pattern matched.
>  
We actually planned on doing that initially. You should note that if you 
want to generate one automaton for multiple patterns, that is not a 
regular language (and thus can not be represented by a FA or DFA.)  You 
will have to try matching against the first pattern, then the next and 
so on.
Ethan