[Nfd-dev] NFD dropping packets

[Gusev, Peter]

Sorry for the confusion. Yes, "old code” relates to my app and ndn-cpp library that I used.
I just want to understand more why packet is being dropped. Based on your reply, it seems that interests use selectors. I’ll check that first...

Thanks,

--
Peter Gusev

peter at remap.ucla.edu<mailto:peter at remap.ucla.edu>
+1 213 5872748

Research Scholar @ REMAP UCLA<http://remap.ucla.edu/>
Video streaming/ICN networks/Creative Development

On Dec 4, 2018, at 2:50 PM, Davide Pesavento <davidepesa at gmail.com<mailto:davidepesa at gmail.com>> wrote:

Hi Peter,

I don't understand what you mean by "old code", what is old? Your app? The library? NFD? All of them? What library is your app using?

Are you using any v0.3 packet format features in your app, such as Interest Parameters? If so, or if for some other reason your library is encoding the Interest in v0.3 format, then the decoder in NFD will not accept any TLV elements that were removed in v0.3, such as Selectors (type=9), and will drop the packet.

Davide

On Tue, Dec 4, 2018, 3:10 PM Gusev, Peter <peter at remap.ucla.edu<mailto:peter at remap.ucla.edu>> wrote:
Hi devs,


I recently noticed that I can’t fetch ndnrtc video stream with somewhat old (~2months) code. In the app I’m getting timeouts:

        1543953646377   [WARN ][       remote-stream]-          operator(): error fetching stream meta: Time out for interest /touchdesigner/ndnrtcOut/ndnrtc/%FD%03/video/s/_meta

while in NFD log I observer these messages:

        1543953961.057775 WARNING: [GenericLinkService] [id=287,local=unix:///private/var/run/nfd.sock,remote=fd://73] packet parse error (unrecognized element of critical type 9): DROP

Face 287 is an application face:

        faceid=287 remote=fd://73 local=unix:///private/var/run/nfd.sock congestion={base-marking-interval=100ms default-threshold=65536B} counters={in={0i 0d 0n 1120B} out={0i 0d 0n 0B}} flags={local on-demand point-to-point congestion-marking}

I was wondering whether these DROP messages relate to my code or not. I still can fetch video with my latest code though.

I’m using NFD 0.6.4 (macOS).

Thanks,

--
Peter Gusev

peter at remap.ucla.edu<mailto:peter at remap.ucla.edu>
+1 213 5872748

Research Scholar @ REMAP UCLA
Video streaming/ICN networks/Creative Development

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