1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2009 Hiroki Sato. 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 #ifndef lint
29 static const char rcsid[] =
30 "$FreeBSD$";
31 #endif
32
33 #include <sys/param.h>
34 #include <sys/ioctl.h>
35 #include <sys/socket.h>
36 #include <sys/sockio.h>
37
38 #include <stdlib.h>
39 #include <unistd.h>
40
41 #include <net/ethernet.h>
42 #include <net/if.h>
43 #include <net/if_gif.h>
44 #include <net/route.h>
45
46 #include <ctype.h>
47 #include <stdio.h>
48 #include <string.h>
49 #include <stdlib.h>
50 #include <unistd.h>
51 #include <err.h>
52 #include <errno.h>
53
54 #include "ifconfig.h"
55
56 #define GIFBITS "\020\2IGNORE_SOURCE"
57
58 static void gif_status(int);
59
60 static void
gif_status(int s)61 gif_status(int s)
62 {
63 int opts;
64
65 ifr.ifr_data = (caddr_t)&opts;
66 #ifndef FSTACK
67 if (ioctl(s, GIFGOPTS, &ifr) == -1)
68 #else
69 size_t offset = (char *)&(ifr.ifr_data) - (char *)&(ifr);
70 size_t clen = sizeof(int);
71 if (ioctl_va(s, GIFGOPTS, &ifr, 3, offset, ifr.ifr_data, clen) == -1)
72 #endif
73 return;
74 if (opts == 0)
75 return;
76 printb("\toptions", opts, GIFBITS);
77 putchar('\n');
78 }
79
80 static void
setgifopts(const char * val,int d,int s,const struct afswtch * afp)81 setgifopts(const char *val, int d, int s, const struct afswtch *afp)
82 {
83 int opts;
84
85 ifr.ifr_data = (caddr_t)&opts;
86 #ifndef FSTACK
87 if (ioctl(s, GIFGOPTS, &ifr) == -1) {
88 #else
89 size_t offset = (char *)&(ifr.ifr_data) - (char *)&(ifr);
90 size_t clen = sizeof(int);
91 if (ioctl_va(s, GIFGOPTS, &ifr, 3, offset, ifr.ifr_data, clen) == -1) {
92 #endif
93 warn("ioctl(GIFGOPTS)");
94 return;
95 }
96
97 if (d < 0)
98 opts &= ~(-d);
99 else
100 opts |= d;
101
102 #ifndef FSTACK
103 if (ioctl(s, GIFSOPTS, &ifr) == -1) {
104 #else
105 if (ioctl_va(s, GIFSOPTS, &ifr, 3, offset, ifr.ifr_data, clen) == -1) {
106 #endif
107 warn("ioctl(GIFSOPTS)");
108 return;
109 }
110 }
111
112 static struct cmd gif_cmds[] = {
113 DEF_CMD("ignore_source", GIF_IGNORE_SOURCE, setgifopts),
114 DEF_CMD("-ignore_source", -GIF_IGNORE_SOURCE, setgifopts),
115 };
116
117 static struct afswtch af_gif = {
118 .af_name = "af_gif",
119 .af_af = AF_UNSPEC,
120 .af_other_status = gif_status,
121 };
122
123 static __constructor void
124 gif_ctor(void)
125 {
126 size_t i;
127
128 for (i = 0; i < nitems(gif_cmds); i++)
129 cmd_register(&gif_cmds[i]);
130 af_register(&af_gif);
131 }
132