1 /* net/if.h -- declarations for inquiring about network interfaces
2 Copyright (C) 2000, 2012 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
28 /* Convert an interface name to an index, and vice versa. */
30 extern unsigned int if_nametoindex (const char *__ifname) __THROW;
31 extern char *if_indextoname (unsigned int __ifindex, char *__ifname) __THROW;
33 /* Return a list of all interfaces and their indices. */
37 unsigned int if_index; /* 1, 2, ... */
38 char *if_name; /* null terminated name: "eth0", ... */
41 extern struct if_nameindex *if_nameindex (void) __THROW;
43 /* Free the data returned from if_nameindex. */
45 extern void if_freenameindex (struct if_nameindex *__ptr) __THROW;