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authorGarrett D'Amore <garrett@damore.org>2018-02-25 17:56:55 -0800
committerGarrett D'Amore <garrett@damore.org>2018-02-25 17:56:55 -0800
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More man page reorganization.
Man pages need special handling, and we can have other kinds of documentation like initial starting guides, etc., which would have different processing applied. So lets move them off into their own directory.
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-= nng_sub(7)
-//
-// Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
-// Copyright 2018 Capitar IT Group BV <info@capitar.com>
-//
-// This document is supplied under the terms of the MIT License, a
-// copy of which should be located in the distribution where this
-// file was obtained (LICENSE.txt). A copy of the license may also be
-// found online at https://opensource.org/licenses/MIT.
-//
-
-== NAME
-
-nng_sub - subscriber protocol
-
-== SYNOPSIS
-
-[source,c]
-----------
-#include <nng/protocol/pubsub0/sub.h>
-
-int nng_sub0_open(nng_socket *s);
-----------
-
-== DESCRIPTION
-
-The _nng_sub_ 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_sub_ protocol is the subscriber side, and the
-<<nng_pub#,nng_pub(7)>> protocol is the publisher side.
-
-NOTE: 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_sub0_open()` call creates a subscriber socket. This socket
-may be used to receive messages, but is unable to send them. Attempts
-to send 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 following protocol-specific options are available.
-
-`NNG_OPT_SUB_SUBSCRIBE`::
-
- This option registers a topic that the subscriber is interested in.
- The option is write-only, and takes an array of bytes, of arbitrary size.
- Each incoming message is checked against the list of subscribed topics.
- If the body begins with the entire set of bytes in the topic, then the
- message is accepted. If no topic matches, then the message is
- discarded.
-+
-TIP: To receive all messages, an empty topic (zero length) can be used.
-
-`NNG_OPT_SUB_UNSUBSCRIBE`::
-
- This option, also read-only, removes a topic from the subscription list.
- Note that if the topic was not previously subscribed to with
- `NNG_OPT_SUB_SUBSCRIBE` then an `NNG_ENOENT` error will result.
-
-=== Protocol Headers
-
-The _nng_sub_ protocol has no protocol-specific headers.
-
-== SEE ALSO
-
-<<nng#,nng(7)>>,
-<<nng_pub#,nng_pub(7)>>