sysdeps/generic/net/if.h

   1 /* net/if.h -- declarations for inquiring about network interfaces
   2    Copyright (C) 2000 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #ifndef _NET_IF_H
  21
  22 #define _NET_IF_H       1
  23 #include <features.h>
  24
  25
  26 __BEGIN_DECLS
  27
  28 /* Convert an interface name to an index, and vice versa.  */
  29
  30 extern unsigned int if_nametoindex (__const char *__ifname) __THROW;
  31 extern char *if_indextoname (unsigned int __ifindex, char *__ifname) __THROW;
  32
  33 /* Return a list of all interfaces and their indices.  */
  34
  35 struct if_nameindex
  36   {
  37     unsigned int if_index;      /* 1, 2, ... */
  38     char *if_name;              /* null terminated name: "eth0", ... */
  39   };
  40
  41 extern struct if_nameindex *if_nameindex (void) __THROW;
  42
  43 /* Free the data returned from if_nameindex.  */
  44
  45 extern void if_freenameindex (struct if_nameindex *__ptr) __THROW;
  46
  47 __END_DECLS
  48
  49
  50 #endif /* net/if.h */