= nn_bind(3compat)
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//
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// Copyright 2020 Staysail Systems, Inc. <info@staysail.tech>
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// Copyright 2018 Capitar IT Group BV <info@capitar.com>
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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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nn_bind - accept connections from remote peers (compatible API)
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== SYNOPSIS
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[source, c]
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----
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#include <nanomsg/nn.h>
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int nn_bind(int sock, const char *url)
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----
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== DESCRIPTION
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The `nn_bind()` function arranges for the socket _sock_ to
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accept connections at the address specified by _url_.
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An identifier for this socket's association with the _url_ is
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returned to the caller on success.
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This identfier can be used with
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xref:nn_shutdown.3compat.adoc[`nn_shutdown()`] to
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remove the association later.
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NOTE: This function is provided for API
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xref:nng_compat.3compat.adoc[compatibility] with legacy _libnanomsg_.
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Consider using the relevant xref:libnng.3.adoc[modern API] instead.
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NOTE: The bind operation is performed asynchronously, and may not have
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completed before this function returns control to the caller.
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IMPORTANT: Only transports supported by legacy _libnanomsg_ may be
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used with this function.
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In particular, only the schemes `tcp://`, `ipc://`, `inproc://`, and `ws://` are
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supported with this function.
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(Use the xref:libnng.3.adoc[modern API] to use other schemes.)
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== RETURN VALUES
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This function returns a positive identifier on success, and -1 on error.
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== ERRORS
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[horizontal]
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`EADDRINUSE`:: The address specified by _url_ is already in use.
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`EADDRNOTAVAIL`:: The address specified by _url_ is not available.
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`EBADF`:: The socket _sock_ is not open.
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`EINVAL`:: An invalid _url_ was supplied.
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== SEE ALSO
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[.text-left]
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xref:nn_connect.3compat.adoc[nn_connect(3compat)],
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xref:nn_errno.3compat.adoc[nn_errno(3compat)],
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xref:nn_shutdown.3compat.adoc[nn_shutdown(3compat)],
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xref:nn_socket.3compat.adoc[nn_socket(3compat)],
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xref:nng_compat.3compat.adoc[nn_compat(3compat)],
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xref:nng.7.adoc[nng(7)]
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