SYNOPSIS
#include <nng/nng.h>
int nng_listener_start(nng_listener l, int flags);DESCRIPTION
The nng_listener_start() function starts the listener l.
This causes the listener to bind to the address it was created with, and to start accepting connections from remote dialers. Each new connection results in a pipe, which will be attached to the listener’s socket.
Normally, the act of "binding" to it’s address is done
synchronously, including any necessary name resolution. As a result,
a failure, such as if the address is already in use, will be returned
immediately. However, if the special value NNG_FLAG_NONBLOCK is
supplied in flags, then this is done asynchronously; furthermore any
failure to bind will be periodically reattempted in the background.
While NNG_FLAG_NONBLOCK can help an application be more resilient,
it also generally makes diagnosing failures somewhat more difficult.
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Once a listener has started, it is generally not possible to change it’s configuration.
RETURN VALUES
This function returns 0 on success, and non-zero otherwise.
ERRORS
NNG_ECLOSED-
Parameter l does not refer to an open listener.
NNG_ESTATE-
The listener l is already started.