1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2009 Hiroki Sato.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
25 * THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#ifndef lint
29static const char rcsid[] =
30  "$FreeBSD$";
31#endif
32
33#include <sys/param.h>
34#include <sys/ioctl.h>
35#include <sys/socket.h>
36#include <sys/sockio.h>
37
38#include <stdlib.h>
39#include <unistd.h>
40
41#include <net/ethernet.h>
42#include <net/if.h>
43#include <net/if_gif.h>
44#include <net/route.h>
45
46#include <ctype.h>
47#include <stdio.h>
48#include <string.h>
49#include <stdlib.h>
50#include <unistd.h>
51#include <err.h>
52#include <errno.h>
53
54#include "ifconfig.h"
55
56#define	GIFBITS	"\020\2IGNORE_SOURCE"
57
58static void	gif_status(int);
59
60static void
61gif_status(int s)
62{
63	int opts;
64
65	ifr.ifr_data = (caddr_t)&opts;
66	if (ioctl(s, GIFGOPTS, &ifr) == -1)
67		return;
68	if (opts == 0)
69		return;
70	printb("\toptions", opts, GIFBITS);
71	putchar('\n');
72}
73
74static void
75setgifopts(const char *val, int d, int s, const struct afswtch *afp)
76{
77	int opts;
78
79	ifr.ifr_data = (caddr_t)&opts;
80	if (ioctl(s, GIFGOPTS, &ifr) == -1) {
81		warn("ioctl(GIFGOPTS)");
82		return;
83	}
84
85	if (d < 0)
86		opts &= ~(-d);
87	else
88		opts |= d;
89
90	if (ioctl(s, GIFSOPTS, &ifr) == -1) {
91		warn("ioctl(GIFSOPTS)");
92		return;
93	}
94}
95
96static struct cmd gif_cmds[] = {
97	DEF_CMD("ignore_source",	GIF_IGNORE_SOURCE,	setgifopts),
98	DEF_CMD("-ignore_source",	-GIF_IGNORE_SOURCE,	setgifopts),
99};
100
101static struct afswtch af_gif = {
102	.af_name	= "af_gif",
103	.af_af		= AF_UNSPEC,
104	.af_other_status = gif_status,
105};
106
107static __constructor void
108gif_ctor(void)
109{
110	size_t i;
111
112	for (i = 0; i < nitems(gif_cmds); i++)
113		cmd_register(&gif_cmds[i]);
114	af_register(&af_gif);
115}
116