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/param.h>
29 #include <sys/ioctl.h>
30 #include <sys/socket.h>
31 #include <sys/sockio.h>
32 #include <net/if.h>
33 #include <net/if_gre.h>
34
35 #include <ctype.h>
36 #include <limits.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40 #include <err.h>
41
42 #include "ifconfig.h"
43
44 static const char *GREBITS[] = {
45 [0] = "ENABLE_CSUM",
46 [1] = "ENABLE_SEQ",
47 [2] = "UDPENCAP",
48 };
49
50 static void
gre_status(if_ctx * ctx)51 gre_status(if_ctx *ctx)
52 {
53 uint32_t opts = 0, port;
54 struct ifreq ifr = { .ifr_data = (caddr_t)&opts };
55
56 if (ioctl_ctx(ctx, GREGKEY, &ifr) == 0)
57 if (opts != 0)
58 printf("\tgrekey: 0x%x (%u)\n", opts, opts);
59 opts = 0;
60 if (ioctl_ctx(ctx, GREGOPTS, &ifr) != 0 || opts == 0)
61 return;
62
63 port = 0;
64 ifr.ifr_data = (caddr_t)&port;
65 if (ioctl_ctx_ifr(ctx, GREGPORT, &ifr) == 0 && port != 0)
66 printf("\tudpport: %u\n", port);
67 printf("\toptions=%x", opts);
68 print_bits("options", &opts, 1, GREBITS, nitems(GREBITS));
69 putchar('\n');
70 }
71
72 static void
setifgrekey(if_ctx * ctx,const char * val,int dummy __unused)73 setifgrekey(if_ctx *ctx, const char *val, int dummy __unused)
74 {
75 uint32_t grekey = strtol(val, NULL, 0);
76 struct ifreq ifr = { .ifr_data = (caddr_t)&grekey };
77
78 ifr.ifr_data = (caddr_t)&grekey;
79 if (ioctl_ctx_ifr(ctx, GRESKEY, &ifr) < 0)
80 warn("ioctl (set grekey)");
81 }
82
83 static void
setifgreport(if_ctx * ctx,const char * val,int dummy __unused)84 setifgreport(if_ctx *ctx, const char *val, int dummy __unused)
85 {
86 uint32_t udpport = strtol(val, NULL, 0);
87 struct ifreq ifr = { .ifr_data = (caddr_t)&udpport };
88
89 if (ioctl_ctx_ifr(ctx, GRESPORT, &ifr) < 0)
90 warn("ioctl (set udpport)");
91 }
92
93 static void
setifgreopts(if_ctx * ctx,const char * val __unused,int d)94 setifgreopts(if_ctx *ctx, const char *val __unused, int d)
95 {
96 uint32_t opts;
97 struct ifreq ifr = { .ifr_data = (caddr_t)&opts };
98
99 if (ioctl_ctx_ifr(ctx, GREGOPTS, &ifr) == -1) {
100 warn("ioctl(GREGOPTS)");
101 return;
102 }
103
104 if (d < 0)
105 opts &= ~(-d);
106 else
107 opts |= d;
108
109 if (ioctl_ctx(ctx, GRESOPTS, &ifr) == -1) {
110 warn("ioctl(GIFSOPTS)");
111 return;
112 }
113 }
114
115
116 static struct cmd gre_cmds[] = {
117 DEF_CMD_ARG("grekey", setifgrekey),
118 DEF_CMD_ARG("udpport", setifgreport),
119 DEF_CMD("enable_csum", GRE_ENABLE_CSUM, setifgreopts),
120 DEF_CMD("-enable_csum",-GRE_ENABLE_CSUM,setifgreopts),
121 DEF_CMD("enable_seq", GRE_ENABLE_SEQ, setifgreopts),
122 DEF_CMD("-enable_seq",-GRE_ENABLE_SEQ, setifgreopts),
123 DEF_CMD("udpencap", GRE_UDPENCAP, setifgreopts),
124 DEF_CMD("-udpencap",-GRE_UDPENCAP, setifgreopts),
125 };
126 static struct afswtch af_gre = {
127 .af_name = "af_gre",
128 .af_af = AF_UNSPEC,
129 .af_other_status = gre_status,
130 };
131
132 static __constructor void
gre_ctor(void)133 gre_ctor(void)
134 {
135 size_t i;
136
137 for (i = 0; i < nitems(gre_cmds); i++)
138 cmd_register(&gre_cmds[i]);
139 af_register(&af_gre);
140 }
141