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 #ifndef FSTACK
30 __FBSDID("$FreeBSD$");
31 #endif
32
33 #include <sys/param.h>
34 #include <sys/ioctl.h>
35 #include <sys/socket.h>
36 #include <sys/sockio.h>
37 #include <net/if.h>
38 #include <net/if_gre.h>
39
40 #include <ctype.h>
41 #include <limits.h>
42 #include <stdio.h>
43 #include <stdlib.h>
44 #include <string.h>
45 #include <err.h>
46
47 #include "ifconfig.h"
48
49 #define GREBITS "\020\01ENABLE_CSUM\02ENABLE_SEQ\03UDPENCAP"
50
51 static void gre_status(int s);
52
53 static void
gre_status(int s)54 gre_status(int s)
55 {
56 uint32_t opts, port;
57
58 opts = 0;
59 ifr.ifr_data = (caddr_t)&opts;
60 #ifndef FSTACK
61 if (ioctl(s, GREGKEY, &ifr) == 0)
62 #else
63 size_t offset = (char *)&(ifr.ifr_data) - (char *)&(ifr);
64 size_t clen = sizeof(uint32_t);
65 if (ioctl_va(s, GREGKEY, &ifr, 3, offset, ifr.ifr_data, clen) == 0)
66 #endif
67 if (opts != 0)
68 printf("\tgrekey: 0x%x (%u)\n", opts, opts);
69 opts = 0;
70 #ifndef FSTACK
71 if (ioctl(s, GREGOPTS, &ifr) != 0 || opts == 0)
72 #else
73 if (ioctl_va(s, GREGOPTS, &ifr, 3, offset, ifr.ifr_data, clen) != 0 || opts == 0)
74 #endif
75 return;
76
77 port = 0;
78 ifr.ifr_data = (caddr_t)&port;
79 #ifndef FSTACK
80 if (ioctl(s, GREGPORT, &ifr) == 0 && port != 0)
81 #else
82 if (ioctl_va(s, GREGOPTS, &ifr, 3, offset, ifr.ifr_data, clen) != 0 || opts == 0)
83 #endif
84 printf("\tudpport: %u\n", port);
85 printb("\toptions", opts, GREBITS);
86 putchar('\n');
87 }
88
89 static void
setifgrekey(const char * val,int dummy __unused,int s,const struct afswtch * afp)90 setifgrekey(const char *val, int dummy __unused, int s,
91 const struct afswtch *afp)
92 {
93 uint32_t grekey = strtol(val, NULL, 0);
94
95 strlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
96 ifr.ifr_data = (caddr_t)&grekey;
97 #ifndef FSTACK
98 if (ioctl(s, GRESKEY, (caddr_t)&ifr) < 0)
99 #else
100 size_t offset = (char *)&(ifr.ifr_data) - (char *)&(ifr);
101 size_t clen = sizeof(uint32_t);
102 if (ioctl_va(s, GRESKEY, (caddr_t)&ifr, 3, offset, ifr.ifr_data, clen) < 0)
103 #endif
104 warn("ioctl (set grekey)");
105 }
106
107 static void
setifgreport(const char * val,int dummy __unused,int s,const struct afswtch * afp)108 setifgreport(const char *val, int dummy __unused, int s,
109 const struct afswtch *afp)
110 {
111 uint32_t udpport = strtol(val, NULL, 0);
112
113 strlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
114 ifr.ifr_data = (caddr_t)&udpport;
115 #ifndef FSTACK
116 if (ioctl(s, GRESPORT, (caddr_t)&ifr) < 0)
117 #else
118 size_t offset = (char *)&(ifr.ifr_data) - (char *)&(ifr);
119 size_t clen = sizeof(uint32_t);
120 if (ioctl_va(s, GRESPORT, (caddr_t)&ifr, 3, offset, ifr.ifr_data, clen) < 0)
121 #endif
122 warn("ioctl (set udpport)");
123 }
124
125 static void
setifgreopts(const char * val,int d,int s,const struct afswtch * afp)126 setifgreopts(const char *val, int d, int s, const struct afswtch *afp)
127 {
128 uint32_t opts;
129
130 ifr.ifr_data = (caddr_t)&opts;
131 #ifndef FSTACK
132 if (ioctl(s, GREGOPTS, &ifr) == -1) {
133 #else
134 size_t offset = (char *)&(ifr.ifr_data) - (char *)&(ifr);
135 size_t clen = sizeof(uint32_t);
136 if (ioctl_va(s, GREGOPTS, (caddr_t)&ifr, 3, offset, ifr.ifr_data, clen) == -1) {
137 #endif
138 warn("ioctl(GREGOPTS)");
139 return;
140 }
141
142 if (d < 0)
143 opts &= ~(-d);
144 else
145 opts |= d;
146
147 #ifndef FSTACK
148 if (ioctl(s, GRESOPTS, &ifr) == -1) {
149 #else
150 if (ioctl_va(s, GRESOPTS, (caddr_t)&ifr, 3, offset, ifr.ifr_data, clen) == -1) {
151 #endif
152 warn("ioctl(GIFSOPTS)");
153 return;
154 }
155 }
156
157
158 static struct cmd gre_cmds[] = {
159 DEF_CMD_ARG("grekey", setifgrekey),
160 DEF_CMD_ARG("udpport", setifgreport),
161 DEF_CMD("enable_csum", GRE_ENABLE_CSUM, setifgreopts),
162 DEF_CMD("-enable_csum",-GRE_ENABLE_CSUM,setifgreopts),
163 DEF_CMD("enable_seq", GRE_ENABLE_SEQ, setifgreopts),
164 DEF_CMD("-enable_seq",-GRE_ENABLE_SEQ, setifgreopts),
165 DEF_CMD("udpencap", GRE_UDPENCAP, setifgreopts),
166 DEF_CMD("-udpencap",-GRE_UDPENCAP, setifgreopts),
167 };
168 static struct afswtch af_gre = {
169 .af_name = "af_gre",
170 .af_af = AF_UNSPEC,
171 .af_other_status = gre_status,
172 };
173
174 static __constructor void
175 gre_ctor(void)
176 {
177 size_t i;
178
179 for (i = 0; i < nitems(gre_cmds); i++)
180 cmd_register(&gre_cmds[i]);
181 af_register(&af_gre);
182 }
183