1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2008 Andrew Thompson. 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#include <sys/cdefs.h>
29__FBSDID("$FreeBSD$");
30
31#include <sys/param.h>
32#include <sys/ioctl.h>
33#include <sys/socket.h>
34#include <sys/sockio.h>
35#include <net/if.h>
36#include <net/if_gre.h>
37
38#include <ctype.h>
39#include <limits.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <string.h>
43#include <err.h>
44
45#include "ifconfig.h"
46
47#define	GREBITS	"\020\01ENABLE_CSUM\02ENABLE_SEQ\03UDPENCAP"
48
49static	void gre_status(int s);
50
51static void
52gre_status(int s)
53{
54	uint32_t opts, port;
55
56	opts = 0;
57	ifr.ifr_data = (caddr_t)&opts;
58	if (ioctl(s, GREGKEY, &ifr) == 0)
59		if (opts != 0)
60			printf("\tgrekey: 0x%x (%u)\n", opts, opts);
61	opts = 0;
62	if (ioctl(s, GREGOPTS, &ifr) != 0 || opts == 0)
63		return;
64
65	port = 0;
66	ifr.ifr_data = (caddr_t)&port;
67	if (ioctl(s, GREGPORT, &ifr) == 0 && port != 0)
68		printf("\tudpport: %u\n", port);
69	printb("\toptions", opts, GREBITS);
70	putchar('\n');
71}
72
73static void
74setifgrekey(const char *val, int dummy __unused, int s,
75    const struct afswtch *afp)
76{
77	uint32_t grekey = strtol(val, NULL, 0);
78
79	strlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
80	ifr.ifr_data = (caddr_t)&grekey;
81	if (ioctl(s, GRESKEY, (caddr_t)&ifr) < 0)
82		warn("ioctl (set grekey)");
83}
84
85static void
86setifgreport(const char *val, int dummy __unused, int s,
87    const struct afswtch *afp)
88{
89	uint32_t udpport = strtol(val, NULL, 0);
90
91	strlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
92	ifr.ifr_data = (caddr_t)&udpport;
93	if (ioctl(s, GRESPORT, (caddr_t)&ifr) < 0)
94		warn("ioctl (set udpport)");
95}
96
97static void
98setifgreopts(const char *val, int d, int s, const struct afswtch *afp)
99{
100	uint32_t opts;
101
102	ifr.ifr_data = (caddr_t)&opts;
103	if (ioctl(s, GREGOPTS, &ifr) == -1) {
104		warn("ioctl(GREGOPTS)");
105		return;
106	}
107
108	if (d < 0)
109		opts &= ~(-d);
110	else
111		opts |= d;
112
113	if (ioctl(s, GRESOPTS, &ifr) == -1) {
114		warn("ioctl(GIFSOPTS)");
115		return;
116	}
117}
118
119
120static struct cmd gre_cmds[] = {
121	DEF_CMD_ARG("grekey",			setifgrekey),
122	DEF_CMD_ARG("udpport",			setifgreport),
123	DEF_CMD("enable_csum", GRE_ENABLE_CSUM,	setifgreopts),
124	DEF_CMD("-enable_csum",-GRE_ENABLE_CSUM,setifgreopts),
125	DEF_CMD("enable_seq", GRE_ENABLE_SEQ,	setifgreopts),
126	DEF_CMD("-enable_seq",-GRE_ENABLE_SEQ,	setifgreopts),
127	DEF_CMD("udpencap", GRE_UDPENCAP,	setifgreopts),
128	DEF_CMD("-udpencap",-GRE_UDPENCAP,	setifgreopts),
129};
130static struct afswtch af_gre = {
131	.af_name	= "af_gre",
132	.af_af		= AF_UNSPEC,
133	.af_other_status = gre_status,
134};
135
136static __constructor void
137gre_ctor(void)
138{
139	size_t i;
140
141	for (i = 0; i < nitems(gre_cmds);  i++)
142		cmd_register(&gre_cmds[i]);
143	af_register(&af_gre);
144}
145