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