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