[RFC] ipfw named states support

[Julian Elischer]

On 26/05/2016 6:11 PM, Dmitry Selivanov wrote:
> 18.05.2016 17:46, Andrey V. Elsukov пишет:
>> We have the patch that adds named states support to ipfw.
>> The idea is that we add a symbolic name-label to each dynamic state in
>> addition to IP addresses, protocol and ports.
>> This introduces new syntax for check-state and keep-state rules:
>>
>>   check-state { token | default | any }
>>   keep-state { token | default }
>
>> 1. Is this feature useful?
> Yes.
>> 2. How to commit it? Due to changed syntax it can break existing
>> rulesets. Probably, we can add some mandatory prefix to state name, 
>> e.g.
>> ':'.
> Maybe create new opcode, e.g. "save-state", and deprecate 
> "keep-state" with "save-state default".
> I'm sorry I didn't understand what Lev Serebryakov suggests, and I 
> could duplicate his suggestion.
I have already hoped for  a different version of keep-state, that 
saves the state without actually acting upon it.
>
> Maybe there is a sense to add "search-state" option and use it 
> instead of "check-state" action. E.g. "allow dst-port 80 
> search-state NAME".
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