sysdeps/generic/net/if.h

   1 /* net/if.h -- declarations for inquiring about network interfaces
   2    Copyright (C) 2000-2014 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   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.
   9
  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.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _NET_IF_H
  20
  21 #define _NET_IF_H       1
  22 #include <features.h>
  23
  24
  25 __BEGIN_DECLS
  26
  27 /* Convert an interface name to an index, and vice versa.  */
  28
  29 extern unsigned int if_nametoindex (const char *__ifname) __THROW;
  30 extern char *if_indextoname (unsigned int __ifindex, char *__ifname) __THROW;
  31
  32 /* Return a list of all interfaces and their indices.  */
  33
  34 struct if_nameindex
  35   {
  36     unsigned int if_index;      /* 1, 2, ... */
  37     char *if_name;              /* null terminated name: "eth0", ... */
  38   };
  39
  40 extern struct if_nameindex *if_nameindex (void) __THROW;
  41
  42 /* Free the data returned from if_nameindex.  */
  43
  44 extern void if_freenameindex (struct if_nameindex *__ptr) __THROW;
  45
  46 __END_DECLS
  47
  48
  49 #endif /* net/if.h */