[Buildroot] Shutting down a websocket

[Graham Newton <gnewton@peavey-eu.com>]

I have a websocket application that communicates with another server via 
a standard socket.  What I would like to do is shutdown the websocket 
cleanly in the event of the standard socket shutting down.
At present if I detect the standard socket shutting down I flag the 
event and call libwebsocket_callback_on_writable.  At the start of the 
processing of LWS_CALLBACK_SERVER_WRITEABLE I test the flag and return 
-1 to shutdown the websocket like so:
     case LWS_CALLBACK_SERVER_WRITEABLE:
         {

             if( pss->shutdown  ){  // pss is a pointer to websocket 
specific user data
                 return -1;         // Shutdown websocket
             }
             ...
However this appears to causes problems in that later I get an assert in 
insert_wsi_socket_into_fds at assert(wsi->sock); which appears to 
suggest that the socket has been shutdown but the websocket object is 
still being serviced.
Am I shutting down the websocket in the correct manner?
Thanks
Graham

-- 
Graham Newton
Senior Software Engineer
------------------------------------------------------------------------
Peavey Digital Research
A Division of Peavey Electronics Corporation


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