1/* $NetBSD: if_43.c,v 1.22 2019/05/17 07:37:11 msaitoh 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 1.22 2019/05/17 07:37:11 msaitoh 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/sys/socket.h>
73#include <compat/sys/sockio.h>
74
75#include <compat/common/compat_util.h>
76#include <compat/common/compat_mod.h>
77#include <uvm/uvm_extern.h>
78
79#if defined(COMPAT_43)
80
81/*
82 * Use a wrapper so that the compat_cvtcmd() can return a u_long
83 */
84static int
85do_compat_cvtcmd(u_long *ncmd, u_long ocmd)
86{
87
88 *ncmd = compat_cvtcmd(ocmd);
89 return 0;
90}
91
92u_long
93compat_cvtcmd(u_long cmd)
94{
95 u_long ncmd;
96
97 if (IOCPARM_LEN(cmd) != sizeof(struct oifreq))
98 return cmd;
99
100 switch (cmd) {
101 case OSIOCSIFADDR:
102 return SIOCSIFADDR;
103 case OOSIOCGIFADDR:
104 return SIOCGIFADDR;
105 case OSIOCSIFDSTADDR:
106 return SIOCSIFDSTADDR;
107 case OOSIOCGIFDSTADDR:
108 return SIOCGIFDSTADDR;
109 case OSIOCSIFFLAGS:
110 return SIOCSIFFLAGS;
111 case OSIOCGIFFLAGS:
112 return SIOCGIFFLAGS;
113 case OOSIOCGIFBRDADDR:
114 return SIOCGIFBRDADDR;
115 case OSIOCSIFBRDADDR:
116 return SIOCSIFBRDADDR;
117 case OOSIOCGIFCONF:
118 return SIOCGIFCONF;
119 case OOSIOCGIFNETMASK:
120 return SIOCGIFNETMASK;
121 case OSIOCSIFNETMASK:
122 return SIOCSIFNETMASK;
123 case OSIOCGIFCONF:
124 return SIOCGIFCONF;
125 case OSIOCADDMULTI:
126 return SIOCADDMULTI;
127 case OSIOCDELMULTI:
128 return SIOCDELMULTI;
129 case SIOCSIFMEDIA_43:
130 return SIOCSIFMEDIA_80;
131 case OSIOCGIFMTU:
132 return SIOCGIFMTU;
133 case OSIOCGIFDATA:
134 return SIOCGIFDATA;
135 case OSIOCZIFDATA:
136 return SIOCZIFDATA;
137 case OBIOCGETIF:
138 return BIOCGETIF;
139 case OBIOCSETIF:
140 return BIOCSETIF;
141 case OTAPGIFNAME:
142 return TAPGIFNAME;
143 default:
144 /*
145 * XXX: the following code should be removed and the
146 * needing treatment ioctls should move to the switch
147 * above.
148 */
149 ncmd = ((cmd) & ~(IOCPARM_MASK << IOCPARM_SHIFT)) |
150 (sizeof(struct ifreq) << IOCPARM_SHIFT);
151 switch (ncmd) {
152 case BIOCGETIF:
153 case BIOCSETIF:
154 case GREDSOCK:
155 case GREGADDRD:
156 case GREGADDRS:
157 case GREGPROTO:
158 case GRESADDRD:
159 case GRESADDRS:
160 case GRESPROTO:
161 case GRESSOCK:
162 case SIOCADDMULTI:
163 case SIOCDELMULTI:
164 case SIOCDIFADDR:
165 case SIOCDIFADDR_IN6:
166 case SIOCDIFPHYADDR:
167 case SIOCGDEFIFACE_IN6:
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 SIOCSDEFIFACE_IN6:
196 case SIOCSIFADDR:
197 case SIOCSIFADDR_IN6:
198 case SIOCSIFBRDADDR:
199 case SIOCSIFDSTADDR:
200 case SIOCSIFDSTADDR_IN6:
201 case SIOCSIFFLAGS:
202 case SIOCSIFGENERIC:
203 case SIOCSIFMEDIA:
204 case SIOCSIFMETRIC:
205 case SIOCSIFMTU:
206 case SIOCSIFNETMASK:
207 case SIOCSIFNETMASK_IN6:
208 case SIOCSNDFLUSH_IN6:
209 case SIOCSPFXFLUSH_IN6:
210 case SIOCSRTRFLUSH_IN6:
211 case SIOCSVH:
212 case TAPGIFNAME:
213 return ncmd;
214 default:
215 { int rv;
216
217 MODULE_HOOK_CALL(if43_cvtcmd_20_hook, (ncmd), enosys(),
218 rv);
219 if (rv == 0)
220 return ncmd;
221 return cmd;
222 }
223 }
224 }
225}
226
227int
228compat_ifioctl(struct socket *so, u_long ocmd, u_long cmd, void *data,
229 struct lwp *l)
230{
231 int error;
232 struct ifreq *ifr = (struct ifreq *)data;
233 struct ifreq ifrb;
234 struct oifreq *oifr = NULL;
235 struct ifnet *ifp;
236 struct sockaddr *sa;
237 struct psref psref;
238 int bound = curlwp_bind();
239
240 ifp = if_get(ifr->ifr_name, &psref);
241 if (ifp == NULL) {
242 curlwp_bindx(bound);
243 return ENXIO;
244 }
245
246 /*
247 * If we have not been converted, make sure that we are.
248 * (because the upper layer handles old socket calls, but
249 * not oifreq calls.
250 */
251 if (cmd == ocmd) {
252 cmd = compat_cvtcmd(ocmd);
253 }
254 if (cmd != ocmd) {
255 oifr = data;
256 data = ifr = &ifrb;
257 IFREQO2N_43(oifr, ifr);
258 }
259
260 switch (ocmd) {
261 case OSIOCSIFADDR:
262 case OSIOCSIFDSTADDR:
263 case OSIOCSIFBRDADDR:
264 case OSIOCSIFNETMASK:
265 sa = &ifr->ifr_addr;
266#if BYTE_ORDER != BIG_ENDIAN
267 if (sa->sa_family == 0 && sa->sa_len < 16) {
268 sa->sa_family = sa->sa_len;
269 sa->sa_len = 16;
270 }
271#else
272 if (sa->sa_len == 0)
273 sa->sa_len = 16;
274#endif
275 break;
276 }
277
278 error = (*so->so_proto->pr_usrreqs->pr_ioctl)(so, cmd, ifr, ifp);
279 if_put(ifp, &psref);
280 curlwp_bindx(bound);
281
282 switch (ocmd) {
283 case OOSIOCGIFADDR:
284 case OOSIOCGIFDSTADDR:
285 case OOSIOCGIFBRDADDR:
286 case OOSIOCGIFNETMASK:
287 *(u_int16_t *)&ifr->ifr_addr =
288 ((struct sockaddr *)&ifr->ifr_addr)->sa_family;
289 break;
290 }
291
292 if (cmd != ocmd)
293 IFREQN2O_43(oifr, ifr);
294
295 return error;
296}
297
298int
299if_43_init(void)
300{
301
302 MODULE_HOOK_SET(if_cvtcmd_43_hook, "if_43", do_compat_cvtcmd);
303 MODULE_HOOK_SET(if_ifioctl_43_hook, "if_43", compat_ifioctl);
304 return 0;
305}
306
307int
308if_43_fini(void)
309{
310
311 MODULE_HOOK_UNSET(if_cvtcmd_43_hook);
312 MODULE_HOOK_UNSET(if_ifioctl_43_hook);
313 return 0;
314}
315#endif /* defined(COMPAT_43) */
316