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diff --git a/REORG.TODO/sysdeps/generic/net/if.h b/REORG.TODO/sysdeps/generic/net/if.h
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+/* net/if.h -- declarations for inquiring about network interfaces
+ Copyright (C) 2000-2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C 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.
+
+ The GNU C 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 the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _NET_IF_H
+
+#define _NET_IF_H 1
+#include <features.h>
+
+
+__BEGIN_DECLS
+
+/* Convert an interface name to an index, and vice versa. */
+
+extern unsigned int if_nametoindex (const char *__ifname) __THROW;
+extern char *if_indextoname (unsigned int __ifindex, char *__ifname) __THROW;
+
+/* Return a list of all interfaces and their indices. */
+
+struct if_nameindex
+ {
+ unsigned int if_index; /* 1, 2, ... */
+ char *if_name; /* null terminated name: "eth0", ... */
+ };
+
+extern struct if_nameindex *if_nameindex (void) __THROW;
+
+/* Free the data returned from if_nameindex. */
+
+extern void if_freenameindex (struct if_nameindex *__ptr) __THROW;
+
+__END_DECLS
+
+
+#endif /* net/if.h */