[ndnSIM] [EXT]Re: External connections to simulation environment

[Hafsteinn Hjartarson]

Hello Junxiao,

I am in the process of connecting the ESP's to ndnSIM using the
TapBridgeNetDevice as you suggested.

As I understand it, I cannot use YourSunny's port to connect the ESP8266 to
my ns-3/ndnSIM simulation environment. What do you suggest I use on the
ESP8266 ?

Could you also please explain to me why you say that by doing this
(connecting external ESP's to a ndnSIM simulation) would make it difficult
to create reproducible experiments?

Best regards,
Hafsteinn

On Sun, Jul 26, 2020 at 5:25 AM Junxiao Shi <shijunxiao at email.arizona.edu>
wrote:

> Hi Hafsteinn
>
> While esp8266ndn used to contain an adaptation of NDN-Lite, it was removed
> earlier this year.
> Current version of esp8266ndn is a *port* of NDNph, a different C++
> library that limits the use of dynamic memory allocations.
> See @yoursunny's blog post about this update:
> https://yoursunny.com/t/2020/NDNph-intro/
> At the moment NDNph cannot run in ns-3 and NDNph. It may or may not happen
> in the future, depending on how many people are interested in this feature
> and whether @yoursunny feels like it.
>
>
> It is certainly possible to connect a real world network device, including
> the ESP8266, to ns-3 and ndnSIM.
> This can be achieved with TapBridgeNetDevice:
> https://www.nsnam.org/docs/release/3.31/models/html/emulation-overview.html
> However, it is difficult to create a reproducible experiment.
>
>
> A better method to achieve your simulation depends on whether the
> algorithm is CPU constrained or memory constrained.
>
> For a memory constrained algorithm:
>
>    1. Define the data structures in NDNph. Find out roughly how many
>    records you can fit in the memory of the target device such as ESP8266.
>    2. Implement the algorithms in ndnSIM using ndn-cxx. Limit the table
>    size of each IoT node not to exceed the limit measured in the previous step.
>
> For a CPU constrained algorithm:
>
>    1. Implement the key operations (such as crypto) in NDNph. Find out
>    roughly how much time does it take to execute (a thousand times of) each
>    operation.
>    2. Implement the algorithms in ndnSIM using ndn-cxx. Model the CPU
>    time for each operation via the simulation scheduler.
>
>
>
> Finally, it is certainly possible to run this experiment in a real network
> that consists of ESP8266 devices and physical machines.
> That would make a stronger case, but it would take significantly more
> effort to create a reproducible experiment.
>
> Yours, Junxiao
>
> On Sat, Jul 25, 2020 at 8:20 PM Hafsteinn Hjartarson via ndnSIM <
> ndnsim at lists.cs.ucla.edu> wrote:
>
>> Hi everyone and thank you for your feedback,
>>
>> To be more precise, I have set up yoursunny's arduino library for NDN on
>> the ESP8266 which can be found here ->
>> https://github.com/yoursunny/esp8266ndn
>>
>> In the paper "Securing ICN-Based UAV Ad Hoc Networks with Blockchain" by
>> Kai Lei et al. , they propose a framework to mitigate the risk of content
>> poisoning in drones communicating over an NDN network. The framework was
>> tested successfully on a powerful machine running NDNsim.
>>
>> What I want to do is to try to use this method to mitigate content
>> poisoning in resource constrained devices such as the ESP8266. In order to
>> test this I must be able to both install NDN on the ESP8266 and connect it
>> to a network where I am able to modify the routers (NFD) myself.
>>
>> Is there possibly a better way to do this? Perhaps not using NDNsim at
>> all?
>>
>> I hope I am making myself understandable and really appreciate all your
>> help.
>>
>> Best regards,
>> Hafsteinn
>>
>> On Sat, Jul 25, 2020 at 4:27 PM Lixia Zhang <lixia at cs.ucla.edu> wrote:
>>
>>>
>>> > On Jul 23, 2020, at 6:36 AM, Hafsteinn Hjartarson via ndnSIM <
>>> ndnsim at lists.cs.ucla.edu> wrote:
>>> >
>>> > Hello,
>>> >
>>> > I am working on a research project related to iot and ndn.
>>> >
>>> > I have set up ndn-lite on two ESP8266 (one acting as a consumer and
>>> one as a producer) and I want to connect them to my simulation network
>>> running on a virtual machine.
>>> >
>>> > Is this possible?
>>>
>>> one first question: what would you like to achieve from doing this?
>>>
>>> Lixia
>>>
>>
>
>
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