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