[Nfd-dev] [Ndn-interest] UDP_retransmissiom

[Davide Pesavento]

Giuseppe,

You didn't need to change the code. As Eric said, to enable the
LpReliability feature, you can specify "reliability on" when creating
a face with nfdc.

That being said, make sure you enable LpReliability on *both* ends of
the link, otherwise the receiver won't know that it has to send ACKs
back.

Best regards,
Davide

On Wed, Jan 10, 2018 at 10:10 AM, Giuseppe Carella
<gcarella228 at gmail.com> wrote:
> Good morning Eric,
>
> I tried to use this functionality changing the NFD code (I set the boolean
> variable isEnalbe = true into the file lp-reliability.hpp).
> It seems that the retransmission becomes mandatory in this way (every time
> the request is sent maxRetx + 1 times).
> Does it behave like that or the retransmission verifies only if the ack is
> not received within RTO?
> Is it possible to customize the value of RTO?
>
> Thank you.
> Giuseppe.
>
> 2018-01-04 20:18 GMT+01:00 Eric Newberry <enewberry at email.arizona.edu>:
>>
>> Hi Giuseppe,
>>
>> By default, the number of retransmissions is set to 3. The option
>> controlling this is in LpReliability::Options as maxRetx. However, currently
>> there is no way to set this option using nfdc or any other management tool.
>> Therefore, if you want to change this, you would need to modify the NFD
>> source code, recompile, and reinstall. There are no options relating to the
>> reliability system in nfd.conf.
>>
>> Eric
>>
>>
>> On 01/04/2018 02:10 AM, Giuseppe Carella wrote:
>>
>> Good morning Eric,
>>
>> Thank you for your answer.
>> I understood that it's possible to implement the retransmission by means
>> of NDNLPv2, which is a protocol located upon the transport layer.
>> So I have to set a maximum number of retransmissions, that's all (I hope).
>> Is it enough modifying some properties into nfd.conf to choose the maximum
>> number of retransmissions or I have to add some new APIs into applicative
>> layer?
>>
>> Thank you.
>> Giuseppe.
>>
>> 2018-01-04 9:31 GMT+01:00 Eric Newberry <enewberry at email.arizona.edu>:
>>>
>>> Giuseppe,
>>>
>>> NFD release 0.6.0 implements a link-layer reliability system as part of
>>> NDNLPv2 for unicast TCP, UDP, and Ethernet faces. It can be enabled by
>>> specifying "reliability on" when creating (or updating) a face with nfdc. In
>>> order for the system to function, it must be enabled on both ends of the
>>> link. The above command only enables it on one end.
>>>
>>> Eric
>>>
>>>
>>> On 01/04/2018 01:24 AM, Giuseppe Carella wrote:
>>>
>>> Good morning community,
>>>
>>> is it possible to configure NFD in order to allow an UDP communication
>>> with retransmission?
>>> I know that I could use TCP, but for my purpose it's necessary having UDP
>>> with retransmission.
>>>
>>> Thank you.
>>> Giuseppe.
>>>
>>>
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>>
>>
>
>
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