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/cdefs.h>
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\03UDPENCAP"
46
47 static void gre_status(int s);
48
49 static void
gre_status(int s)50 gre_status(int s)
51 {
52 uint32_t opts, port;
53
54 opts = 0;
55 ifr.ifr_data = (caddr_t)&opts;
56 if (ioctl(s, GREGKEY, &ifr) == 0)
57 if (opts != 0)
58 printf("\tgrekey: 0x%x (%u)\n", opts, opts);
59 opts = 0;
60 if (ioctl(s, GREGOPTS, &ifr) != 0 || opts == 0)
61 return;
62
63 port = 0;
64 ifr.ifr_data = (caddr_t)&port;
65 if (ioctl(s, GREGPORT, &ifr) == 0 && port != 0)
66 printf("\tudpport: %u\n", port);
67 printb("\toptions", opts, GREBITS);
68 putchar('\n');
69 }
70
71 static void
setifgrekey(const char * val,int dummy __unused,int s,const struct afswtch * afp)72 setifgrekey(const char *val, int dummy __unused, int s,
73 const struct afswtch *afp)
74 {
75 uint32_t grekey = strtol(val, NULL, 0);
76
77 strlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
78 ifr.ifr_data = (caddr_t)&grekey;
79 if (ioctl(s, GRESKEY, (caddr_t)&ifr) < 0)
80 warn("ioctl (set grekey)");
81 }
82
83 static void
setifgreport(const char * val,int dummy __unused,int s,const struct afswtch * afp)84 setifgreport(const char *val, int dummy __unused, int s,
85 const struct afswtch *afp)
86 {
87 uint32_t udpport = strtol(val, NULL, 0);
88
89 strlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
90 ifr.ifr_data = (caddr_t)&udpport;
91 if (ioctl(s, GRESPORT, (caddr_t)&ifr) < 0)
92 warn("ioctl (set udpport)");
93 }
94
95 static void
setifgreopts(const char * val,int d,int s,const struct afswtch * afp)96 setifgreopts(const char *val, int d, int s, const struct afswtch *afp)
97 {
98 uint32_t opts;
99
100 ifr.ifr_data = (caddr_t)&opts;
101 if (ioctl(s, GREGOPTS, &ifr) == -1) {
102 warn("ioctl(GREGOPTS)");
103 return;
104 }
105
106 if (d < 0)
107 opts &= ~(-d);
108 else
109 opts |= d;
110
111 if (ioctl(s, GRESOPTS, &ifr) == -1) {
112 warn("ioctl(GIFSOPTS)");
113 return;
114 }
115 }
116
117
118 static struct cmd gre_cmds[] = {
119 DEF_CMD_ARG("grekey", setifgrekey),
120 DEF_CMD_ARG("udpport", setifgreport),
121 DEF_CMD("enable_csum", GRE_ENABLE_CSUM, setifgreopts),
122 DEF_CMD("-enable_csum",-GRE_ENABLE_CSUM,setifgreopts),
123 DEF_CMD("enable_seq", GRE_ENABLE_SEQ, setifgreopts),
124 DEF_CMD("-enable_seq",-GRE_ENABLE_SEQ, setifgreopts),
125 DEF_CMD("udpencap", GRE_UDPENCAP, setifgreopts),
126 DEF_CMD("-udpencap",-GRE_UDPENCAP, setifgreopts),
127 };
128 static struct afswtch af_gre = {
129 .af_name = "af_gre",
130 .af_af = AF_UNSPEC,
131 .af_other_status = gre_status,
132 };
133
134 static __constructor void
gre_ctor(void)135 gre_ctor(void)
136 {
137 size_t i;
138
139 for (i = 0; i < nitems(gre_cmds); i++)
140 cmd_register(&gre_cmds[i]);
141 af_register(&af_gre);
142 }
143