[ndnSIM] Sending a custom Interest

[Spyridon (Spyros) Mastorakis]

Hi,

you should be able to use the SendInterest method directly from the afterReceiveInterest callback of your strategy to send out the Interests that you need.

Just make sure that there is a FIB entry for the appropriate name.

Thanks,

Spyridon (Spyros) Mastorakis
Personal Website: http://cs.ucla.edu/~mastorakis/ <http://cs.ucla.edu/~mastorakis/>
Internet Research Laboratory
Computer Science Department
UCLA

> On Apr 24, 2017, at 11:08 PM, Michał Król <mharnen at gmail.com> wrote:
> 
> Hi Spyridon,
> 
> thank you for your answer. I've read both before starting my strategy. However, I don't see anything concerning creating and sending a custom interest (not the one passed by the forwarder) from the strategy. Am I missing something?
> 
> On 25/04/17 01:22, Spyridon (Spyros) Mastorakis wrote:
>> Hi,
>> 
>> please take a look at the related documentation:
>> 
>> http://ndnsim.net/2.3/helpers.html#forwarding-strategy <http://ndnsim.net/2.3/helpers.html#forwarding-strategy>
>> http://ndnsim.net/2.3/fw.html#writing-your-own-custom-strategy <http://ndnsim.net/2.3/fw.html#writing-your-own-custom-strategy>
>> 
>> Thanks,
>> 
>> Spyridon (Spyros) Mastorakis
>> Personal Website: http://cs.ucla.edu/~mastorakis/ <http://cs.ucla.edu/%7Emastorakis/>
>> Internet Research Laboratory
>> Computer Science Department
>> UCLA
>> 
>>> On Apr 24, 2017, at 7:50 AM, Michał Król <mharnen at gmail.com <mailto:mharnen at gmail.com>> wrote:
>>> 
>>> Dear All,
>>> 
>>> I'm trying to send a new Interest packet from my forwarding strategy (for signaling reasons). So after I get an interest for data I forward it, and want to generate and broadcast another one to my neighbors.
>>> 
>>> I tried to modify the code from ndn-app.cpp as that's the only "example" I found. However, the interest is not passed to the Forwarder and I'm not sure how to do it. The callback "afterSendInterest" is invoked.
>>> 
>>> I'm wondering if I can use "NullTransport" for that (as it's done for ndn-app) or I need a different one?
>>> 
>>> Is it the right way to implement a signaling protocol in my forwarding strategy?
>>> 
>>> I would be grateful for any advices/comments.
>>> 
>>> 
>>> Regards,
>>> 
>>> Michał Król
>>> 
>>> 
>>> 
>>> //create and add a face
>>> 
>>>  auto genericLink = make_unique<nfd::face::GenericLinkService>();
>>>  auto transport = make_unique<ns3::ndn::NullTransport>("appFace://", "appFace://",
>>> ::ndn::nfd::FACE_SCOPE_LOCAL);
>>>  m_face = std::make_shared<Face>(std::move(genericLink), std::move(transport));
>>>  m_genericLinkService = static_cast<nfd::face::GenericLinkService*>(m_face->getLinkService());
>>>  m_face->setMetric(1);
>>>  m_forwarder.addFace(m_face);
>>> 
>>> 
>>> //connect callbacks
>>>  m_genericLinkService->afterReceiveData.connect([this] (Data data) {
>>>                      onData(data);
>>>                        });
>>> 
>>>  m_genericLinkService->afterSendInterest.connect([this] (Interest interest) {
>>>                      afterInterest(interest);
>>>                        });
>>> 
>>> 
>>> //send an interest
>>> 
>>>  shared_ptr<Name> name = make_shared<Name>("/signaling");
>>>  shared_ptr<Interest> interest = make_shared<Interest>();
>>>  interest->setName(*name);
>>> 
>>>  m_genericLinkService->sendInterest(*interest);
>>> 
>>> 
>> 
> 

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