/usr/include/nice/interfaces.h is in libnice-dev 0.1.14-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* interfaces.h - Source for interface discovery code
*
* Farsight Helper functions
* Copyright (C) 2006 Youness Alaoui <kakaroto@kakaroto.homelinux.net>
* Copyright (C) 2008-2009 Collabora, Nokia
* Contact: Youness Alaoui
* Copyright (C) 2008-2009 Nokia Corporation. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __LIBNICE_INTERFACES_H__
#define __LIBNICE_INTERFACES_H__
/**
* SECTION:interfaces
* @short_description: Utility functions to discover local network interfaces
* @include: interfaces.h
* @stability: Stable
*
* These utility functions allow the discovery of local network interfaces
* in a portable manner, they also allow finding the local ip addresses or
* the address allocated to a network interface.
*/
#include <glib.h>
G_BEGIN_DECLS
/**
* nice_interfaces_get_ip_for_interface:
* @interface_name: name of local interface
*
* Retrieves the IP address of an interface by its name. If this fails, %NULL
* is returned.
*
* Returns: (nullable) (transfer full): a newly-allocated string with the IP
* address
*/
gchar * nice_interfaces_get_ip_for_interface (gchar *interface_name);
/**
* nice_interfaces_get_local_ips:
* @include_loopback: Include any loopback devices
*
* Get a list of local ipv4 interface addresses
*
* Returns: (element-type utf8) (transfer full): a newly-allocated #GList of
* strings. The caller must free it.
*/
GList * nice_interfaces_get_local_ips (gboolean include_loopback);
/**
* nice_interfaces_get_local_interfaces:
*
* Get the list of local interfaces
*
* Returns: (element-type utf8) (transfer full): a newly-allocated #GList of
* strings. The caller must free it.
*/
GList * nice_interfaces_get_local_interfaces (void);
G_END_DECLS
#endif /* __LIBNICE_INTERFACES_H__ */
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