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glibc  2.9
if.h
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00001 /* net/if.h -- declarations for inquiring about network interfaces
00002    Copyright (C) 2000 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #ifndef _NET_IF_H
00021 
00022 #define _NET_IF_H    1
00023 #include <features.h>
00024 
00025 
00026 __BEGIN_DECLS
00027 
00028 /* Convert an interface name to an index, and vice versa.  */
00029 
00030 extern unsigned int if_nametoindex (__const char *__ifname) __THROW;
00031 extern char *if_indextoname (unsigned int __ifindex, char *__ifname) __THROW;
00032 
00033 /* Return a list of all interfaces and their indices.  */
00034 
00035 struct if_nameindex
00036   {
00037     unsigned int if_index;  /* 1, 2, ... */
00038     char *if_name;          /* null terminated name: "eth0", ... */
00039   };
00040 
00041 extern struct if_nameindex *if_nameindex (void) __THROW;
00042 
00043 /* Free the data returned from if_nameindex.  */
00044 
00045 extern void if_freenameindex (struct if_nameindex *__ptr) __THROW;
00046 
00047 __END_DECLS
00048 
00049 
00050 #endif /* net/if.h */