Where i fill the extension field?

[m1guer]

I'm trying to implement some authentication to identify the users who are connected to the socket (by the PID), but I didn't find a way to put it in "Extension," or am I doing it the wrong way? here is my code: https://gist.github.com/m1guer/7bc54537a20117508885cf7d27724952

[Totodore]

You can modify the extension map by using SocketRef::extensions.

[m1guer]

hmm but where should i put extensions on the client side??? which field will it be?