getsockname and gepeername of "POSIX TCP Sockets over WebSockets" get stuck during exchange with proxy server

Both functions exhibit similar behavior, so let's consider getsockname. The implementation (in websocket_to_posix_proxy.cpp) prepares a message, sends the message and waits for the reply forever. On the proxy server side (websocket_to_posix_proxy) the log yells "Received too small sockets call message!". On examination, it seems like the client specifies an incorrect size of the message being sent to the server.