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NOTE: This documentation is for version 0.2.0 of nng, but the latest released version is 1.1.0. Please see the documentation for 1.1.0 for the most up-to-date information.


#include <nng/protocol/pubsub0/pub.h>

int nng_pub0_open(nng_socket *s);


The nng_pub protocol is one half of a publisher/subscriber pattern. In this pattern, a publisher sends data, which is broadcast to all subscribers. The subscribing applications only see the data to which they have subscribed.

The nng_pub protocol is the publisher side, and the nng_sub(7) protocol is the subscriber side.

In this implementation, the publisher delivers all messages to all subscribers. The subscribers maintain their own subscriptions, and filter them locally. Thus, this pattern should not be used in an attempt to reduce bandwidth consumption.

The topics that subscribers subscribe to is just the first part of the message body. Applications should construct their messages accordingly.

Socket Operations

The nng_pub0_open() call creates a publisher socket. This socket may be used to send messages, but is unable to receive them. Attempts to receive messages will result in NNG_ENOTSUP.

Protocol Versions

Only version 0 of this protocol is supported. (At the time of writing, no other versions of this protocol have been defined.)

Protocol Options

The nng_pub protocol has no protocol-specific options.

Protocol Headers

The nng_pub protocol has no protocol-specific headers.


NNG Reference Manual v0.2.0 © 2018 Staysail Systems, Inc, © 2018 Capitar IT Group BV
This document is supplied under the MIT License.
nanomsg™ and nng™ are trademarks of Garrett D'Amore.