1/* $NetBSD: if_43.c,v 1.13 2016/11/05 23:30:22 pgoyette 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 1.13 2016/11/05 23:30:22 pgoyette 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
58#include <sys/syscallargs.h>
59
60#include <net/if.h>
61#include <net/bpf.h>
62#include <net/route.h>
63#include <netinet/in.h>
64#include <netinet/in_systm.h>
65#include <netinet/ip.h>
66#include <net/if_gre.h>
67#include <net/if_atm.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/if_43.h>
77#include <uvm/uvm_extern.h>
78
79u_long
80compat_cvtcmd(u_long cmd)
81{
82 u_long ncmd;
83
84 if (IOCPARM_LEN(cmd) != sizeof(struct oifreq))
85 return cmd;
86
87 switch (cmd) {
88 case OSIOCSIFADDR:
89 return SIOCSIFADDR;
90 case OOSIOCGIFADDR:
91 return SIOCGIFADDR;
92 case OSIOCSIFDSTADDR:
93 return SIOCSIFDSTADDR;
94 case OOSIOCGIFDSTADDR:
95 return SIOCGIFDSTADDR;
96 case OSIOCSIFFLAGS:
97 return SIOCSIFFLAGS;
98 case OSIOCGIFFLAGS:
99 return SIOCGIFFLAGS;
100 case OOSIOCGIFBRDADDR:
101 return SIOCGIFBRDADDR;
102 case OSIOCSIFBRDADDR:
103 return SIOCSIFBRDADDR;
104 case OOSIOCGIFCONF:
105 return SIOCGIFCONF;
106 case OOSIOCGIFNETMASK:
107 return SIOCGIFNETMASK;
108 case OSIOCSIFNETMASK:
109 return SIOCSIFNETMASK;
110 case OSIOCGIFCONF:
111 return SIOCGIFCONF;
112 case OSIOCADDMULTI:
113 return SIOCADDMULTI;
114 case OSIOCDELMULTI:
115 return SIOCDELMULTI;
116 case OSIOCSIFMEDIA:
117 return SIOCSIFMEDIA;
118 case OSIOCGIFMTU:
119 return SIOCGIFMTU;
120 case OSIOCGIFDATA:
121 return SIOCGIFDATA;
122 case OSIOCZIFDATA:
123 return SIOCZIFDATA;
124 case OBIOCGETIF:
125 return BIOCGETIF;
126 case OBIOCSETIF:
127 return BIOCSETIF;
128 case OTAPGIFNAME:
129 return TAPGIFNAME;
130 default:
131 /*
132 * XXX: the following code should be removed and the
133 * needing treatment ioctls should move to the switch
134 * above.
135 */
136 ncmd = ((cmd) & ~(IOCPARM_MASK << IOCPARM_SHIFT)) |
137 (sizeof(struct ifreq) << IOCPARM_SHIFT);
138 switch (ncmd) {
139 case BIOCGETIF:
140 case BIOCSETIF:
141 case GREDSOCK:
142 case GREGADDRD:
143 case GREGADDRS:
144 case GREGPROTO:
145 case GRESADDRD:
146 case GRESADDRS:
147 case GRESPROTO:
148 case GRESSOCK:
149#ifdef COMPAT_20
150 case OSIOCG80211STATS:
151 case OSIOCG80211ZSTATS:
152#endif /* COMPAT_20 */
153 case SIOCADDMULTI:
154 case SIOCDELMULTI:
155 case SIOCDIFADDR:
156 case SIOCDIFADDR_IN6:
157 case SIOCDIFPHYADDR:
158 case SIOCGDEFIFACE_IN6:
159 case SIOCG80211NWID:
160 case SIOCG80211STATS:
161 case SIOCG80211ZSTATS:
162 case SIOCGIFADDR:
163 case SIOCGIFADDR_IN6:
164 case SIOCGIFAFLAG_IN6:
165 case SIOCGIFALIFETIME_IN6:
166 case SIOCGIFBRDADDR:
167 case SIOCGIFDLT:
168 case SIOCGIFDSTADDR:
169 case SIOCGIFDSTADDR_IN6:
170 case SIOCGIFFLAGS:
171 case SIOCGIFGENERIC:
172 case SIOCGIFMETRIC:
173 case SIOCGIFMTU:
174 case SIOCGIFNETMASK:
175 case SIOCGIFNETMASK_IN6:
176 case SIOCGIFPDSTADDR:
177 case SIOCGIFPDSTADDR_IN6:
178 case SIOCGIFPSRCADDR:
179 case SIOCGIFPSRCADDR_IN6:
180 case SIOCGIFSTAT_ICMP6:
181 case SIOCGIFSTAT_IN6:
182 case SIOCGPVCSIF:
183 case SIOCGVH:
184 case SIOCIFCREATE:
185 case SIOCIFDESTROY:
186 case SIOCS80211NWID:
187 case SIOCSDEFIFACE_IN6:
188 case SIOCSIFADDR:
189 case SIOCSIFADDR_IN6:
190 case SIOCSIFBRDADDR:
191 case SIOCSIFDSTADDR:
192 case SIOCSIFDSTADDR_IN6:
193 case SIOCSIFFLAGS:
194 case SIOCSIFGENERIC:
195 case SIOCSIFMEDIA:
196 case SIOCSIFMETRIC:
197 case SIOCSIFMTU:
198 case SIOCSIFNETMASK:
199 case SIOCSIFNETMASK_IN6:
200 case SIOCSNDFLUSH_IN6:
201 case SIOCSPFXFLUSH_IN6:
202 case SIOCSPVCSIF:
203 case SIOCSRTRFLUSH_IN6:
204 case SIOCSVH:
205 case TAPGIFNAME:
206 return ncmd;
207 default:
208 return cmd;
209 }
210 }
211}
212
213int
214compat_ifioctl(struct socket *so, u_long ocmd, u_long cmd, void *data,
215 struct lwp *l)
216{
217 int error;
218 struct ifreq *ifr = (struct ifreq *)data;
219 struct ifreq ifrb;
220 struct oifreq *oifr = NULL;
221 struct ifnet *ifp;
222 struct sockaddr *sa;
223 struct psref psref;
224 int bound = curlwp_bind();
225
226 ifp = if_get(ifr->ifr_name, &psref);
227 if (ifp == NULL) {
228 curlwp_bindx(bound);
229 return ENXIO;
230 }
231
232 /*
233 * If we have not been converted, make sure that we are.
234 * (because the upper layer handles old socket calls, but
235 * not oifreq calls.
236 */
237 if (cmd == ocmd) {
238 cmd = compat_cvtcmd(ocmd);
239 }
240 if (cmd != ocmd) {
241 oifr = data;
242 data = ifr = &ifrb;
243 ifreqo2n(oifr, ifr);
244 }
245
246 switch (ocmd) {
247 case OSIOCSIFADDR:
248 case OSIOCSIFDSTADDR:
249 case OSIOCSIFBRDADDR:
250 case OSIOCSIFNETMASK:
251 sa = &ifr->ifr_addr;
252#if BYTE_ORDER != BIG_ENDIAN
253 if (sa->sa_family == 0 && sa->sa_len < 16) {
254 sa->sa_family = sa->sa_len;
255 sa->sa_len = 16;
256 }
257#else
258 if (sa->sa_len == 0)
259 sa->sa_len = 16;
260#endif
261 break;
262 }
263
264 error = (*so->so_proto->pr_usrreqs->pr_ioctl)(so, cmd, ifr, ifp);
265 if_put(ifp, &psref);
266 curlwp_bindx(bound);
267
268 switch (ocmd) {
269 case OOSIOCGIFADDR:
270 case OOSIOCGIFDSTADDR:
271 case OOSIOCGIFBRDADDR:
272 case OOSIOCGIFNETMASK:
273 *(u_int16_t *)&ifr->ifr_addr =
274 ((struct sockaddr *)&ifr->ifr_addr)->sa_family;
275 break;
276 }
277
278 if (cmd != ocmd)
279 ifreqn2o(oifr, ifr);
280
281 return error;
282}
283
284#if defined(COMPAT_43)
285static u_long (*orig_compat_cvtcmd)(u_long);
286static int (*orig_compat_ifioctl)(struct socket *, u_long, u_long,
287 void *, struct lwp *);
288
289void
290if_43_init(void)
291{
292 extern u_long (*vec_compat_cvtcmd)(u_long);
293 extern int (*vec_compat_ifioctl)(struct socket *, u_long, u_long,
294 void *, struct lwp *);
295
296 orig_compat_cvtcmd = vec_compat_cvtcmd;
297 vec_compat_cvtcmd = compat_cvtcmd;
298
299 orig_compat_ifioctl = vec_compat_ifioctl;
300 vec_compat_ifioctl = compat_ifioctl;
301}
302
303void
304if_43_fini(void)
305{
306
307 vec_compat_cvtcmd = orig_compat_cvtcmd;
308 vec_compat_ifioctl = orig_compat_ifioctl;
309}
310#endif /* defined(COMPAT_43) */
311