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50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/* net/if.h -- declarations for inquiring about network interfaces
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Copyright (C) 2000-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _NET_IF_H
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#define _NET_IF_H 1
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#include <features.h>
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__BEGIN_DECLS
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/* Convert an interface name to an index, and vice versa. */
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extern unsigned int if_nametoindex (const char *__ifname) __THROW;
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extern char *if_indextoname (unsigned int __ifindex, char *__ifname) __THROW;
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/* Return a list of all interfaces and their indices. */
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struct if_nameindex
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{
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unsigned int if_index; /* 1, 2, ... */
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char *if_name; /* null terminated name: "eth0", ... */
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};
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extern struct if_nameindex *if_nameindex (void) __THROW;
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/* Free the data returned from if_nameindex. */
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extern void if_freenameindex (struct if_nameindex *__ptr) __THROW;
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__END_DECLS
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#endif /* net/if.h */
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