xref: /freebsd/sbin/ifconfig/ifgre.c (revision 39ee7a7a6bdd1557b1c3532abf60d139798ac88b)
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("$FreeBSD$");
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 
47 static	void gre_status(int s);
48 
49 static void
50 gre_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 
65 static void
66 setifgrekey(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 
77 static void
78 setifgreopts(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 
100 static 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 };
107 static struct afswtch af_gre = {
108 	.af_name	= "af_gre",
109 	.af_af		= AF_UNSPEC,
110 	.af_other_status = gre_status,
111 };
112 
113 static __constructor void
114 gre_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