= nng_stream_listener_alloc(3str)
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//
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// Copyright 2019 Staysail Systems, Inc. <info@staysail.tech>
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// Copyright 2018 Capitar IT Group BV <info@capitar.com>
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// Copyright 2019 Devolutions <info@devolutions.net>
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//
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// This document is supplied under the terms of the MIT License, a
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// copy of which should be located in the distribution where this
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// file was obtained (LICENSE.txt). A copy of the license may also be
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// found online at https://opensource.org/licenses/MIT.
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//
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== NAME
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nng_stream_listener_alloc - allocate byte stream listener
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== SYNOPSIS
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[source, c]
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----
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#include <nng/nng.h>
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int nng_stream_listener_alloc(nng_stream_listener **lp, const char *addr);
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int nng_stream_listener_alloc_url(nng_stream_listener **lp, const nng_url *url);
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----
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== DESCRIPTION
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These functions allocates a listener for byte streams.
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Listeners create
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xref:nng_stream.5.adoc[`nng_stream`] objects by accepting incoming
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connections, via the
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xref:nng_stream_listener_accept.3str.adoc[`nng_stream_listener_accept()`]
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function.
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The first form, `nng_stream_listener_alloc()`, connects to the address
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specified by _addr_, which should be a string representing a URL.
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The second form, `nng_stream_listener_alloc_url()`, takes a pre-parsed
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or pre-constructed
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xref:nng_url.5.adoc[`nng_url`] object to determine the remote address.
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These functions may support different URL schemes, such as
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`ipc://`, `tcp://`, `tls+tcp://`, or `ws://`.
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Both forms store the listener in the location referenced by _lp_.
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== RETURN VALUES
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These functions return 0 on success, and non-zero otherwise.
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== ERRORS
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[horizontal]
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`NNG_ENOMEM`:: Insufficient free memory exists.
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`NNG_ENOTSUP`:: The URL scheme is not supported by the implementation.
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`NNG_EADDRINVAL`:: The URL requested is invalid.
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== SEE ALSO
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[.text-left]
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xref:nng_strerror.3.adoc[nng_strerror(3)],
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xref:nng_stream_listener_accept.3str.adoc[nng_stream_listener_accept(3str)]
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xref:nng_stream_listener_close.3str.adoc[nng_stream_listener_close(3str)]
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xref:nng_stream_listener_free.3str.adoc[nng_stream_listener_free(3str)]
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xref:nng_stream_listener_get.3str.adoc[nng_stream_listener_get(3str)]
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xref:nng_stream_listener_listen.3str.adoc[nng_stream_listener_listen(3str)]
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xref:nng_stream_listener_set.3str.adoc[nng_stream_listener_set(3str)]
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xref:nng_stream_listener.5.adoc[nng_stream_listener(5)]
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