1 /* $NetBSD: if_43.c,v 1.27 2023/03/30 17:48:10 riastradh Exp $ */
2
3 /*
4 * Copyright (c) 1982, 1986, 1989, 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)uipc_syscalls.c 8.4 (Berkeley) 2/21/94
32 */
33
34 #include <sys/cdefs.h>
35 __KERNEL_RCSID(0, "$NetBSD: if_43.c,v 1.27 2023/03/30 17:48:10 riastradh Exp $");
36
37 #if defined(_KERNEL_OPT)
38 #include "opt_compat_netbsd.h"
39 #endif
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/filedesc.h>
44 #include <sys/kernel.h>
45 #include <sys/proc.h>
46 #include <sys/file.h>
47 #include <sys/socket.h>
48 #include <sys/socketvar.h>
49 #include <sys/stat.h>
50 #include <sys/ioctl.h>
51 #include <sys/fcntl.h>
52 #include <sys/syslog.h>
53 #include <sys/unistd.h>
54 #include <sys/resourcevar.h>
55 #include <sys/mbuf.h> /* for MLEN */
56 #include <sys/protosw.h>
57 #include <sys/compat_stub.h>
58
59 #include <sys/syscallargs.h>
60
61 #include <net/if.h>
62 #include <net/bpf.h>
63 #include <net/route.h>
64 #include <netinet/in.h>
65 #include <netinet/in_systm.h>
66 #include <netinet/ip.h>
67 #include <net/if_gre.h>
68 #include <net/if_tap.h>
69 #include <net80211/ieee80211_ioctl.h>
70 #include <netinet6/in6_var.h>
71 #include <netinet6/nd6.h>
72 #include <compat/net/if.h>
73 #include <compat/sys/socket.h>
74 #include <compat/sys/sockio.h>
75
76 #include <compat/common/compat_util.h>
77 #include <compat/common/compat_mod.h>
78 #include <uvm/uvm_extern.h>
79
80 #if defined(COMPAT_43)
81
82 /*
83 * Use a wrapper so that the compat_cvtcmd() can return a u_long
84 */
85 static int
do_compat_cvtcmd(u_long * ncmd,u_long ocmd)86 do_compat_cvtcmd(u_long *ncmd, u_long ocmd)
87 {
88
89 *ncmd = compat_cvtcmd(ocmd);
90 return 0;
91 }
92
93 u_long
compat_cvtcmd(u_long cmd)94 compat_cvtcmd(u_long cmd)
95 {
96 u_long ncmd;
97
98 if (IOCPARM_LEN(cmd) != sizeof(struct oifreq))
99 return cmd;
100
101 switch (cmd) {
102 case OSIOCSIFADDR:
103 return SIOCSIFADDR;
104 case OOSIOCGIFADDR:
105 return SIOCGIFADDR;
106 case OSIOCSIFDSTADDR:
107 return SIOCSIFDSTADDR;
108 case OOSIOCGIFDSTADDR:
109 return SIOCGIFDSTADDR;
110 case OSIOCSIFFLAGS:
111 return SIOCSIFFLAGS;
112 case OSIOCGIFFLAGS:
113 return SIOCGIFFLAGS;
114 case OOSIOCGIFBRDADDR:
115 return SIOCGIFBRDADDR;
116 case OSIOCSIFBRDADDR:
117 return SIOCSIFBRDADDR;
118 case OOSIOCGIFCONF:
119 return SIOCGIFCONF;
120 case OOSIOCGIFNETMASK:
121 return SIOCGIFNETMASK;
122 case OSIOCSIFNETMASK:
123 return SIOCSIFNETMASK;
124 case OSIOCGIFCONF:
125 return SIOCGIFCONF;
126 case OSIOCADDMULTI:
127 return SIOCADDMULTI;
128 case OSIOCDELMULTI:
129 return SIOCDELMULTI;
130 case SIOCSIFMEDIA_43:
131 return SIOCSIFMEDIA_80;
132 case OSIOCGIFMTU:
133 return SIOCGIFMTU;
134 case OSIOCGIFDATA:
135 return SIOCGIFDATA;
136 case OSIOCZIFDATA:
137 return SIOCZIFDATA;
138 case OBIOCGETIF:
139 return BIOCGETIF;
140 case OBIOCSETIF:
141 return BIOCSETIF;
142 case OTAPGIFNAME:
143 return TAPGIFNAME;
144 default:
145 /*
146 * XXX: the following code should be removed and the
147 * needing treatment ioctls should move to the switch
148 * above.
149 */
150 ncmd = ((cmd) & ~(IOCPARM_MASK << IOCPARM_SHIFT)) |
151 (sizeof(struct ifreq) << IOCPARM_SHIFT);
152 switch (ncmd) {
153 case BIOCGETIF:
154 case BIOCSETIF:
155 case GREDSOCK:
156 case GREGADDRD:
157 case GREGADDRS:
158 case GREGPROTO:
159 case GRESADDRD:
160 case GRESADDRS:
161 case GRESPROTO:
162 case GRESSOCK:
163 case SIOCADDMULTI:
164 case SIOCDELMULTI:
165 case SIOCDIFADDR:
166 case SIOCDIFADDR_IN6:
167 case SIOCDIFPHYADDR:
168 case SIOCG80211NWID:
169 case SIOCG80211STATS:
170 case SIOCG80211ZSTATS:
171 case SIOCGIFADDR:
172 case SIOCGIFADDR_IN6:
173 case SIOCGIFAFLAG_IN6:
174 case SIOCGIFALIFETIME_IN6:
175 case SIOCGIFBRDADDR:
176 case SIOCGIFDLT:
177 case SIOCGIFDSTADDR:
178 case SIOCGIFDSTADDR_IN6:
179 case SIOCGIFFLAGS:
180 case SIOCGIFGENERIC:
181 case SIOCGIFMETRIC:
182 case SIOCGIFMTU:
183 case SIOCGIFNETMASK:
184 case SIOCGIFNETMASK_IN6:
185 case SIOCGIFPDSTADDR:
186 case SIOCGIFPDSTADDR_IN6:
187 case SIOCGIFPSRCADDR:
188 case SIOCGIFPSRCADDR_IN6:
189 case SIOCGIFSTAT_ICMP6:
190 case SIOCGIFSTAT_IN6:
191 case SIOCGVH:
192 case SIOCIFCREATE:
193 case SIOCIFDESTROY:
194 case SIOCS80211NWID:
195 case SIOCSIFADDR:
196 case SIOCSIFADDR_IN6:
197 case SIOCSIFBRDADDR:
198 case SIOCSIFDSTADDR:
199 case SIOCSIFDSTADDR_IN6:
200 case SIOCSIFFLAGS:
201 case SIOCSIFGENERIC:
202 case SIOCSIFMEDIA:
203 case SIOCSIFMETRIC:
204 case SIOCSIFMTU:
205 case SIOCSIFNETMASK:
206 case SIOCSIFNETMASK_IN6:
207 case SIOCSVH:
208 case TAPGIFNAME:
209 return ncmd;
210 default:
211 { int rv;
212
213 MODULE_HOOK_CALL(if43_cvtcmd_20_hook, (ncmd), enosys(),
214 rv);
215 if (rv == 0)
216 return ncmd;
217 return cmd;
218 }
219 }
220 }
221 }
222
223 int
compat_ifioctl(struct socket * so,u_long ocmd,u_long cmd,void * data,struct lwp * l)224 compat_ifioctl(struct socket *so, u_long ocmd, u_long cmd, void *data,
225 struct lwp *l)
226 {
227 int error;
228 struct ifreq *ifr = (struct ifreq *)data;
229 struct ifreq ifrb;
230 struct oifreq *oifr = NULL;
231 struct ifnet *ifp;
232 struct sockaddr *sa;
233 struct psref psref;
234 int bound = curlwp_bind();
235
236 ifp = if_get(ifr->ifr_name, &psref);
237 if (ifp == NULL) {
238 curlwp_bindx(bound);
239 return ENXIO;
240 }
241
242 /*
243 * If we have not been converted, make sure that we are.
244 * (because the upper layer handles old socket calls, but
245 * not oifreq calls.
246 */
247 if (cmd == ocmd) {
248 cmd = compat_cvtcmd(ocmd);
249 }
250 if (cmd != ocmd) {
251 oifr = data;
252 ifr = &ifrb;
253 IFREQO2N_43(oifr, ifr);
254 }
255
256 switch (ocmd) {
257 enum { maxlen = sizeof(oifr->ifr_ifru) };
258 CTASSERT(maxlen == 16);
259 socklen_t famlen;
260 case OSIOCSIFADDR:
261 case OSIOCSIFDSTADDR:
262 case OSIOCSIFBRDADDR:
263 case OSIOCSIFNETMASK:
264 sa = &ifr->ifr_addr;
265 #if BYTE_ORDER != BIG_ENDIAN
266 if (sa->sa_family == 0 && sa->sa_len < maxlen) {
267 sa->sa_family = sa->sa_len;
268 sa->sa_len = maxlen;
269 }
270 #else
271 if (sa->sa_len == 0)
272 sa->sa_len = maxlen;
273 #endif
274 famlen = sockaddr_getsize_by_family(sa->sa_family);
275 if (famlen > sa->sa_len) {
276 curlwp_bindx(bound);
277 return EAFNOSUPPORT;
278 }
279
280 break;
281 }
282
283 error = (*so->so_proto->pr_usrreqs->pr_ioctl)(so, cmd, ifr, ifp);
284 if_put(ifp, &psref);
285 curlwp_bindx(bound);
286
287 switch (ocmd) {
288 case OOSIOCGIFADDR:
289 case OOSIOCGIFDSTADDR:
290 case OOSIOCGIFBRDADDR:
291 case OOSIOCGIFNETMASK:
292 *(u_int16_t *)&ifr->ifr_addr =
293 ((struct sockaddr *)&ifr->ifr_addr)->sa_family;
294 break;
295 }
296
297 if (cmd != ocmd)
298 IFREQN2O_43(oifr, ifr);
299
300 return error;
301 }
302
303 int
if_43_init(void)304 if_43_init(void)
305 {
306
307 MODULE_HOOK_SET(if_cvtcmd_43_hook, do_compat_cvtcmd);
308 MODULE_HOOK_SET(if_ifioctl_43_hook, compat_ifioctl);
309 return 0;
310 }
311
312 int
if_43_fini(void)313 if_43_fini(void)
314 {
315
316 MODULE_HOOK_UNSET(if_cvtcmd_43_hook);
317 MODULE_HOOK_UNSET(if_ifioctl_43_hook);
318 return 0;
319 }
320 #endif /* defined(COMPAT_43) */
321