source: grub-pc/trunk/fuentes/debian/grub-extras/disabled/gpxe/src/core/interface.c @ 22

Last change on this file since 22 was 22, checked in by mabarracus, 4 years ago

updated version and apply net.ifnames=0 into debian/rules

File size: 1.9 KB
Line 
1/*
2 * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19FILE_LICENCE ( GPL2_OR_LATER );
20
21#include <gpxe/wrap.h>
22#include <gpxe/interface.h>
23
24/** @file
25 *
26 * Object communication interfaces
27 *
28 */
29
30/**
31 * Plug an interface into a new destination interface
32 *
33 * @v intf              Interface
34 * @v dest              New destination interface
35 *
36 * The reference to the existing destination interface is dropped, a
37 * reference to the new destination interface is obtained, and the
38 * interface is updated to point to the new destination interface.
39 *
40 * Note that there is no "unplug" call; instead you must plug the
41 * interface into a null interface.
42 */
43void plug ( struct interface *intf, struct interface *dest ) {
44        DBGC ( intf, "INTF %p moving from INTF %p to INTF %p\n",
45               intf, intf->dest, dest );
46        intf_put ( intf->dest );
47        intf->dest = intf_get ( dest );
48}
49
50/**
51 * Plug two interfaces together
52 *
53 * @v a                 Interface A
54 * @v b                 Interface B
55 *
56 * Plugs interface A into interface B, and interface B into interface
57 * A.  (The basic plug() function is unidirectional; this function is
58 * merely a shorthand for two calls to plug(), hence the name.)
59 */
60void plug_plug ( struct interface *a, struct interface *b ) {
61        plug ( a, b );
62        plug ( b, a );
63}
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