[Libwebsockets] TR: Web socket server received a ping

Andy Green andy at warmcat.com
Tue Oct 13 10:18:01 CEST 2020

On 10/13/20 8:51 AM, Peiffer Eric wrote:
> Hi ,
> I resend my question 

You sent it originally to "libwebsockets-bounces"

> is it a way to have an event when the web socket 
> server receive a web socket ping?

No, because in RFC6455 ws PING is defined to do one thing, return a PONG 
with the exact same payload as the PING came in with.  Lws takes care of 
that for you.

There's a callback LWS_CALLBACK_RECEIVE_PONG to indicate the PONG 
arrived though.

In v4.1+ the connection validity stuff takes care of the larger issue of 
confirming that the connection is still passing data both ways, and 
generates PINGs and times out PONGs for you.



> Regards,
> Eric
> ------------------------------------------------------------------------
> *De :* Peiffer Eric
> *Envoyé :* lundi 12 octobre 2020 14:27
> *À :* Libwebsockets <libwebsockets-bounces at ml.libwebsockets.org>
> *Objet :* Web socket server received a ping
> Hi,
> Is there a callback, when the web socket server receives a web socket 
> ping from the client?
> Regards,
> Eric.
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