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1 | /* net/if.h -- declarations for inquiring about network interfaces |
---|---|
2 | Copyright (C) 2000-2024 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 | <https://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 */ |
50 |
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