The nng_pipe_dialer()
function returns the nng_dialer
that created the pipe p.
If the pipe was not created by a dialer, then the returned value will
have an identifier (nng_dialer_id()
) of -1
.
This function returns the dialer that created the pipe, unless it was
not created by a dialer, in which case a value initialized with
NNG_DIALER_INITIALIZER
will be returned.