1 /* $OpenBSD: sysctl.c,v 1.16 2024/02/03 16:21:20 deraadt Exp $ */
2
3 /*
4 * Copyright (c) 2009 Theo de Raadt <deraadt@openbsd.org>
5 * Copyright (c) 2007 Kenneth R. Westerback <krw@openbsd.org>
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20 #include <sys/types.h>
21 #include <sys/socket.h>
22 #include <sys/time.h>
23 #include <sys/sysctl.h>
24 #include <sys/uio.h>
25
26 #include <netinet/in.h>
27
28 #include <ctype.h>
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <unistd.h>
33
34 #include <machine/cpu.h>
35
36 #define SOIIKEY_LEN 16
37
38 struct var {
39 char *name;
40 int (*print)(struct var *);
41 int nmib;
42 int mib[3];
43 };
44
45 int pstring(struct var *);
46 int pint(struct var *);
47
48 struct var vars[] = {
49 { "kern.osrelease", pstring, 2,
50 { CTL_KERN, KERN_OSRELEASE }},
51 { "hw.machine", pstring, 2,
52 { CTL_HW, HW_MACHINE }},
53 { "hw.model", pstring, 2,
54 { CTL_HW, HW_MODEL }},
55 { "hw.product", pstring, 2,
56 { CTL_HW, HW_PRODUCT }},
57 { "hw.disknames", pstring, 2,
58 { CTL_HW, HW_DISKNAMES }},
59 { "hw.ncpufound", pint, 2,
60 { CTL_HW, HW_NCPUFOUND }},
61 #ifdef __amd64__
62 { "machdep.retpoline", pint, 2,
63 { CTL_MACHDEP, CPU_RETPOLINE }},
64 #endif
65 #ifdef CPU_COMPATIBLE
66 { "machdep.compatible", pstring, 2,
67 { CTL_MACHDEP, CPU_COMPATIBLE }},
68 #endif
69 };
70
71 int nflag;
72 char *name;
73
74 int
pint(struct var * v)75 pint(struct var *v)
76 {
77 int n;
78 size_t len = sizeof(n);
79
80 if (sysctl(v->mib, v->nmib, &n, &len, NULL, 0) != -1) {
81 if (nflag == 0)
82 printf("%s=", v->name);
83 printf("%d\n", n);
84 return (0);
85 }
86 return (1);
87 }
88
89 int
pstring(struct var * v)90 pstring(struct var *v)
91 {
92 char *p;
93 size_t len;
94
95 if (sysctl(v->mib, v->nmib, NULL, &len, NULL, 0) != -1)
96 if ((p = malloc(len)) != NULL)
97 if (sysctl(v->mib, v->nmib, p, &len, NULL, 0) != -1) {
98 if (nflag == 0)
99 printf("%s=", v->name);
100 printf("%s\n", p);
101 return (0);
102 }
103 return (1);
104 }
105
106 int
parse_hex_char(char ch)107 parse_hex_char(char ch)
108 {
109 if (ch >= '0' && ch <= '9')
110 return (ch - '0');
111
112 ch = tolower((unsigned char)ch);
113 if (ch >= 'a' && ch <= 'f')
114 return (ch - 'a' + 10);
115
116 return (-1);
117 }
118
119 int
set_soii_key(char * src)120 set_soii_key(char *src)
121 {
122 uint8_t key[SOIIKEY_LEN];
123 int mib[4] = {CTL_NET, PF_INET6, IPPROTO_IPV6, IPV6CTL_SOIIKEY};
124 int i, c;
125
126 for(i = 0; i < SOIIKEY_LEN; i++) {
127 if ((c = parse_hex_char(src[2 * i])) == -1)
128 return (-1);
129 key[i] = c << 4;
130 if ((c = parse_hex_char(src[2 * i + 1])) == -1)
131 return (-1);
132 key[i] |= c;
133 }
134
135 return sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, NULL, key,
136 SOIIKEY_LEN);
137 }
138
139 int
main(int argc,char * argv[])140 main(int argc, char *argv[])
141 {
142 int ch, i;
143
144 while ((ch = getopt(argc, argv, "n")) != -1) {
145 switch (ch) {
146 case 'n':
147 nflag = 1;
148 break;
149 default:
150 fprintf(stderr, "usage: sysctl [-n] [name]\n");
151 exit(1);
152 }
153 }
154
155 argc -= optind;
156 argv += optind;
157
158 if (argc == 0) {
159 for (i = 0; i < sizeof(vars)/sizeof(vars[0]); i++)
160 (vars[i].print)(&vars[i]);
161 exit(0);
162 }
163
164 while (argc--) {
165 name = *argv++;
166 /*
167 * strlen("net.inet6.ip6.soiikey="
168 * "00000000000000000000000000000000") == 54
169 * strlen("net.inet6.ip6.soiikey=") == 22
170 */
171 if (strlen(name) == 54 && strncmp(name,
172 "net.inet6.ip6.soiikey=", 22) == 0) {
173 set_soii_key(name + 22);
174 continue;
175 }
176
177 for (i = 0; i < sizeof(vars)/sizeof(vars[0]); i++) {
178 if (strcmp(name, vars[i].name) == 0) {
179 (vars[i].print)(&vars[i]);
180 break;
181 }
182 }
183 }
184
185 exit(0);
186 }
187