ifgre.c revision 288305 
1/*-
2 * Copyright (c) 2008 Andrew Thompson. 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#include <sys/cdefs.h>
27__FBSDID("$FreeBSD: head/sbin/ifconfig/ifgre.c 288305 2015-09-27 07:51:18Z ngie $");
28
29#include <sys/param.h>
30#include <sys/ioctl.h>
31#include <sys/socket.h>
32#include <sys/sockio.h>
33#include <net/if.h>
34#include <net/if_gre.h>
35
36#include <ctype.h>
37#include <limits.h>
38#include <stdio.h>
39#include <stdlib.h>
40#include <string.h>
41#include <err.h>
42
43#include "ifconfig.h"
44
45#define	GREBITS	"\020\01ENABLE_CSUM\02ENABLE_SEQ"
46
47static	void gre_status(int s);
48
49static void
50gre_status(int s)
51{
52	uint32_t opts = 0;
53
54	ifr.ifr_data = (caddr_t)&opts;
55	if (ioctl(s, GREGKEY, &ifr) == 0)
56		if (opts != 0)
57			printf("\tgrekey: 0x%x (%u)\n", opts, opts);
58	opts = 0;
59	if (ioctl(s, GREGOPTS, &ifr) != 0 || opts == 0)
60		return;
61	printb("\toptions", opts, GREBITS);
62	putchar('\n');
63}
64
65static void
66setifgrekey(const char *val, int dummy __unused, int s,
67    const struct afswtch *afp)
68{
69	uint32_t grekey = strtol(val, NULL, 0);
70
71	strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
72	ifr.ifr_data = (caddr_t)&grekey;
73	if (ioctl(s, GRESKEY, (caddr_t)&ifr) < 0)
74		warn("ioctl (set grekey)");
75}
76
77static void
78setifgreopts(const char *val, int d, int s, const struct afswtch *afp)
79{
80	uint32_t opts;
81
82	ifr.ifr_data = (caddr_t)&opts;
83	if (ioctl(s, GREGOPTS, &ifr) == -1) {
84		warn("ioctl(GREGOPTS)");
85		return;
86	}
87
88	if (d < 0)
89		opts &= ~(-d);
90	else
91		opts |= d;
92
93	if (ioctl(s, GRESOPTS, &ifr) == -1) {
94		warn("ioctl(GIFSOPTS)");
95		return;
96	}
97}
98
99
100static struct cmd gre_cmds[] = {
101	DEF_CMD_ARG("grekey",			setifgrekey),
102	DEF_CMD("enable_csum", GRE_ENABLE_CSUM,	setifgreopts),
103	DEF_CMD("-enable_csum",-GRE_ENABLE_CSUM,setifgreopts),
104	DEF_CMD("enable_seq", GRE_ENABLE_SEQ,	setifgreopts),
105	DEF_CMD("-enable_seq",-GRE_ENABLE_SEQ,	setifgreopts),
106};
107static struct afswtch af_gre = {
108	.af_name	= "af_gre",
109	.af_af		= AF_UNSPEC,
110	.af_other_status = gre_status,
111};
112
113static __constructor void
114gre_ctor(void)
115{
116	size_t i;
117
118	for (i = 0; i < nitems(gre_cmds);  i++)
119		cmd_register(&gre_cmds[i]);
120	af_register(&af_gre);
121}
122