ifgif.c revision 287730 
1/*-
2 * Copyright (c) 2009 Hiroki Sato.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
17 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
19 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
21 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
22 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef lint
27static const char rcsid[] =
28  "$FreeBSD: stable/10/sbin/ifconfig/ifgif.c 287730 2015-09-13 01:35:40Z hrs $";
29#endif
30
31#include <sys/param.h>
32#include <sys/ioctl.h>
33#include <sys/socket.h>
34#include <sys/sockio.h>
35
36#include <stdlib.h>
37#include <unistd.h>
38
39#include <net/ethernet.h>
40#include <net/if.h>
41#include <net/if_gif.h>
42#include <net/route.h>
43
44#include <ctype.h>
45#include <stdio.h>
46#include <string.h>
47#include <stdlib.h>
48#include <unistd.h>
49#include <err.h>
50#include <errno.h>
51
52#include "ifconfig.h"
53
54#define	GIFBITS	"\020\2IGNORE_SOURCE"
55
56static void	gif_status(int);
57
58static void
59gif_status(int s)
60{
61	int opts;
62
63	ifr.ifr_data = (caddr_t)&opts;
64	if (ioctl(s, GIFGOPTS, &ifr) == -1)
65		return;
66	if (opts == 0)
67		return;
68	printb("\toptions", opts, GIFBITS);
69	putchar('\n');
70}
71
72static void
73setgifopts(const char *val, int d, int s, const struct afswtch *afp)
74{
75	int opts;
76
77	ifr.ifr_data = (caddr_t)&opts;
78	if (ioctl(s, GIFGOPTS, &ifr) == -1) {
79		warn("ioctl(GIFGOPTS)");
80		return;
81	}
82
83	if (d < 0)
84		opts &= ~(-d);
85	else
86		opts |= d;
87
88	if (ioctl(s, GIFSOPTS, &ifr) == -1) {
89		warn("ioctl(GIFSOPTS)");
90		return;
91	}
92}
93
94static struct cmd gif_cmds[] = {
95	DEF_CMD("ignore_source",	GIF_IGNORE_SOURCE,	setgifopts),
96	DEF_CMD("-ignore_source",	-GIF_IGNORE_SOURCE,	setgifopts),
97};
98
99static struct afswtch af_gif = {
100	.af_name	= "af_gif",
101	.af_af		= AF_UNSPEC,
102	.af_other_status = gif_status,
103};
104
105static __constructor void
106gif_ctor(void)
107{
108	size_t i;
109
110	for (i = 0; i < nitems(gif_cmds); i++)
111		cmd_register(&gif_cmds[i]);
112	af_register(&af_gif);
113}
114