#include <nng/nng.h> int nng_listener_close(nng_listener l);
nng_listener_close() function closes the listener l.
This also closes any pipes that have been created by the listener.
Once this function returns, the listener l and any of its resources
Therefore it is an error to attempt to access l
after this function has returned.
(Attempts to do so will result in
Listeners are implicitly closed when the socket they are associated with is closed.
This function returns 0 on success, and non-zero otherwise.
Parameter l does not refer to an open listener.