Re: [Anima-bootstrap] anima-bootstrap: Bootstrap proxy discovery options

Brian, 

Are the session-id and the nonce equivalent?

Why is the 30000 a parameter passed into the into the grasp.discover call? This looks like a timeout for how long to wait for a response (GRASP_DEF_TIMEOUT/2)? If so this would provide the 30s behavior but is leveraging a side-effect dubiously. Sufficient for PoC; I’m just asking to understand. 

Toerless’s suggestion appears to be to include the “locator-option” within the discover message. Did you include that? Currently "locator-option” is not part of the [grasp] s3.7.2 Discover Message. Are you comfortable adding that as Toerless argues for?

- max

> On Dec 3, 2015, at 9:27 PM, Brian E Carpenter <brian.e.carpenter@gmail.com> wrote:
> 
> On 04/12/2015 14:43, Toerless Eckert wrote:
> 
> ...
>>   IMHO, i would let the proxy periodically (30 secs) just announce that its providing
>>   AN enrollment proxy function via link-local IPv6 multicast. 
> 
> Here's the Python code to do that with my prototype:
> 
> import grasp
> import time
> 
> OK, nonce = grasp.register_asa("Boot")
> if not OK:
>    #we've got a serious problem...
>    raise RuntimeError("Can't register as ASA")
> 
> obj = objective(0,":Boot")
> x = grasp.register_obj(nonce, obj)
> if not x == "OK":
>    #we've got a different problem...
>    raise RuntimeError(x)
> 
> while True:
>    grasp.discover(nonce, obj, 30000)
> 
> What this does is register the caller as an ASA called "Boot" that handles the
> objective called ":Boot", and then LL multicast a discovery message every
> 30s. That will tell the others that it's there. It's running in another window
> as I type. I didn't write the handler code for the receiving end yet though,
> so I just get output like this twice a minute:
> 
> CBOR->Python gives:  [1, 1248700, b'$\x06\xe0\x07S\x07\x00\x01(\xcc\xdcL\x97\x03g\x81', ':Boot', 0, 6, 0]
> 
>> Maybe with port-number
>>   and protocol (EST over IPv6 link-local ) as parameters so it's extensible.
> 
> If you want parameters, we'd need to use the (synch) flooding method
> instead. Maybe I'll write that code next week; it will be very similar to
> the discovery case. I don't think there are any real problems here.
> 
> Python+CBOR is fun. Thanks, Toerless, for pushing the CBOR idea.
> 
>   Brian
> 
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