blob: 6def90e0a1124b6772c480d099e7f6a505ba82f8 [file] [log] [blame]
YOSHIFUJI Hideaki4768fbc2007-02-09 23:25:31 +09001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * 32bit Socket syscall emulation. Based on arch/sparc64/kernel/sys_sparc32.c.
3 *
4 * Copyright (C) 2000 VA Linux Co
5 * Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
6 * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
7 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
8 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
9 * Copyright (C) 2000 Hewlett-Packard Co.
10 * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
YOSHIFUJI Hideaki4768fbc2007-02-09 23:25:31 +090011 * Copyright (C) 2000,2001 Andi Kleen, SuSE Labs
Linus Torvalds1da177e2005-04-16 15:20:36 -070012 */
13
14#include <linux/kernel.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090015#include <linux/gfp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/fs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/types.h>
18#include <linux/file.h>
19#include <linux/icmpv6.h>
20#include <linux/socket.h>
21#include <linux/syscalls.h>
22#include <linux/filter.h>
23#include <linux/compat.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/security.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040025#include <linux/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
27#include <net/scm.h>
28#include <net/sock.h>
David L Stevensdae50292008-04-27 01:06:07 -070029#include <net/ip.h>
30#include <net/ipv6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <asm/uaccess.h>
32#include <net/compat.h>
33
34static inline int iov_from_user_compat_to_kern(struct iovec *kiov,
35 struct compat_iovec __user *uiov32,
36 int niov)
37{
38 int tot_len = 0;
39
Stephen Hemmingere71a4782007-04-10 20:10:33 -070040 while (niov > 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 compat_uptr_t buf;
42 compat_size_t len;
43
Stephen Hemmingere71a4782007-04-10 20:10:33 -070044 if (get_user(len, &uiov32->iov_len) ||
David S. Miller8acfe462010-10-28 11:41:55 -070045 get_user(buf, &uiov32->iov_base))
46 return -EFAULT;
47
48 if (len > INT_MAX - tot_len)
49 len = INT_MAX - tot_len;
50
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 tot_len += len;
52 kiov->iov_base = compat_ptr(buf);
53 kiov->iov_len = (__kernel_size_t) len;
54 uiov32++;
55 kiov++;
56 niov--;
57 }
58 return tot_len;
59}
60
61int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg)
62{
63 compat_uptr_t tmp1, tmp2, tmp3;
64
65 if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) ||
66 __get_user(tmp1, &umsg->msg_name) ||
67 __get_user(kmsg->msg_namelen, &umsg->msg_namelen) ||
68 __get_user(tmp2, &umsg->msg_iov) ||
69 __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) ||
70 __get_user(tmp3, &umsg->msg_control) ||
71 __get_user(kmsg->msg_controllen, &umsg->msg_controllen) ||
72 __get_user(kmsg->msg_flags, &umsg->msg_flags))
73 return -EFAULT;
74 kmsg->msg_name = compat_ptr(tmp1);
75 kmsg->msg_iov = compat_ptr(tmp2);
76 kmsg->msg_control = compat_ptr(tmp3);
77 return 0;
78}
79
80/* I've named the args so it is easy to tell whose space the pointers are in. */
81int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -070082 struct sockaddr *kern_address, int mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -070083{
84 int tot_len;
85
Stephen Hemmingere71a4782007-04-10 20:10:33 -070086 if (kern_msg->msg_namelen) {
Eric Dumazetc6d409c2010-06-03 20:03:40 -070087 if (mode == VERIFY_READ) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 int err = move_addr_to_kernel(kern_msg->msg_name,
89 kern_msg->msg_namelen,
90 kern_address);
Stephen Hemmingere71a4782007-04-10 20:10:33 -070091 if (err < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 return err;
93 }
94 kern_msg->msg_name = kern_address;
95 } else
96 kern_msg->msg_name = NULL;
97
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 tot_len = iov_from_user_compat_to_kern(kern_iov,
99 (struct compat_iovec __user *)kern_msg->msg_iov,
100 kern_msg->msg_iovlen);
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700101 if (tot_len >= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 kern_msg->msg_iov = kern_iov;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
104 return tot_len;
105}
106
107/* Bleech... */
108#define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32))
109
110#define CMSG_COMPAT_DATA(cmsg) \
111 ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))))
112#define CMSG_COMPAT_SPACE(len) \
113 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len))
114#define CMSG_COMPAT_LEN(len) \
115 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len))
116
117#define CMSG_COMPAT_FIRSTHDR(msg) \
118 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \
119 (struct compat_cmsghdr __user *)((msg)->msg_control) : \
120 (struct compat_cmsghdr __user *)NULL)
121
122#define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
123 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \
124 (ucmlen) <= (unsigned long) \
125 ((mhdr)->msg_controllen - \
126 ((char *)(ucmsg) - (char *)(mhdr)->msg_control)))
127
128static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
129 struct compat_cmsghdr __user *cmsg, int cmsg_len)
130{
131 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
132 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
133 msg->msg_controllen)
134 return NULL;
135 return (struct compat_cmsghdr __user *)ptr;
136}
137
138/* There is a lot of hair here because the alignment rules (and
139 * thus placement) of cmsg headers and length are different for
140 * 32-bit apps. -DaveM
141 */
Al Viro8920e8f2005-09-07 18:28:51 -0700142int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 unsigned char *stackbuf, int stackbuf_size)
144{
145 struct compat_cmsghdr __user *ucmsg;
146 struct cmsghdr *kcmsg, *kcmsg_base;
147 compat_size_t ucmlen;
148 __kernel_size_t kcmlen, tmp;
Al Viro8920e8f2005-09-07 18:28:51 -0700149 int err = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
151 kcmlen = 0;
152 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
153 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700154 while (ucmsg != NULL) {
155 if (get_user(ucmlen, &ucmsg->cmsg_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 return -EFAULT;
157
158 /* Catch bogons. */
159 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
160 return -EINVAL;
161
162 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
163 CMSG_ALIGN(sizeof(struct cmsghdr)));
Al Viro8920e8f2005-09-07 18:28:51 -0700164 tmp = CMSG_ALIGN(tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 kcmlen += tmp;
166 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
167 }
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700168 if (kcmlen == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 return -EINVAL;
170
171 /* The kcmlen holds the 64-bit version of the control length.
172 * It may not be modified as we do not stick it into the kmsg
173 * until we have successfully copied over all of the data
174 * from the user.
175 */
Al Viro8920e8f2005-09-07 18:28:51 -0700176 if (kcmlen > stackbuf_size)
177 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
178 if (kcmsg == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 return -ENOBUFS;
180
181 /* Now copy them over neatly. */
182 memset(kcmsg, 0, kcmlen);
183 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700184 while (ucmsg != NULL) {
Al Viro8920e8f2005-09-07 18:28:51 -0700185 if (__get_user(ucmlen, &ucmsg->cmsg_len))
186 goto Efault;
187 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
188 goto Einval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
190 CMSG_ALIGN(sizeof(struct cmsghdr)));
Al Viro8920e8f2005-09-07 18:28:51 -0700191 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
192 goto Einval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 kcmsg->cmsg_len = tmp;
Al Viro8920e8f2005-09-07 18:28:51 -0700194 tmp = CMSG_ALIGN(tmp);
195 if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) ||
196 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) ||
197 copy_from_user(CMSG_DATA(kcmsg),
198 CMSG_COMPAT_DATA(ucmsg),
199 (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg)))))
200 goto Efault;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201
202 /* Advance. */
Al Viro8920e8f2005-09-07 18:28:51 -0700203 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
205 }
206
207 /* Ok, looks like we made it. Hook it up and return success. */
208 kmsg->msg_control = kcmsg_base;
209 kmsg->msg_controllen = kcmlen;
210 return 0;
211
Al Viro8920e8f2005-09-07 18:28:51 -0700212Einval:
213 err = -EINVAL;
214Efault:
215 if (kcmsg_base != (struct cmsghdr *)stackbuf)
216 sock_kfree_s(sk, kcmsg_base, kcmlen);
217 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218}
219
220int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
221{
222 struct compat_timeval ctv;
Patrick Ohly20d49472009-02-12 05:03:38 +0000223 struct compat_timespec cts[3];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
225 struct compat_cmsghdr cmhdr;
226 int cmlen;
227
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700228 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 kmsg->msg_flags |= MSG_CTRUNC;
230 return 0; /* XXX: return error? check spec. */
231 }
232
Patrick Ohlyd35aac12008-11-12 01:54:56 -0800233 if (level == SOL_SOCKET && type == SCM_TIMESTAMP) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 struct timeval *tv = (struct timeval *)data;
235 ctv.tv_sec = tv->tv_sec;
236 ctv.tv_usec = tv->tv_usec;
237 data = &ctv;
Eric Dumazet92f37fd2007-03-25 22:14:49 -0700238 len = sizeof(ctv);
239 }
Patrick Ohly20d49472009-02-12 05:03:38 +0000240 if (level == SOL_SOCKET &&
241 (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) {
242 int count = type == SCM_TIMESTAMPNS ? 1 : 3;
243 int i;
Eric Dumazet92f37fd2007-03-25 22:14:49 -0700244 struct timespec *ts = (struct timespec *)data;
Patrick Ohly20d49472009-02-12 05:03:38 +0000245 for (i = 0; i < count; i++) {
246 cts[i].tv_sec = ts[i].tv_sec;
247 cts[i].tv_nsec = ts[i].tv_nsec;
248 }
Eric Dumazet92f37fd2007-03-25 22:14:49 -0700249 data = &cts;
Patrick Ohly20d49472009-02-12 05:03:38 +0000250 len = sizeof(cts[0]) * count;
YOSHIFUJI Hideaki4768fbc2007-02-09 23:25:31 +0900251 }
252
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 cmlen = CMSG_COMPAT_LEN(len);
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700254 if (kmsg->msg_controllen < cmlen) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 kmsg->msg_flags |= MSG_CTRUNC;
256 cmlen = kmsg->msg_controllen;
257 }
258 cmhdr.cmsg_level = level;
259 cmhdr.cmsg_type = type;
260 cmhdr.cmsg_len = cmlen;
261
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700262 if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 return -EFAULT;
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700264 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 return -EFAULT;
266 cmlen = CMSG_COMPAT_SPACE(len);
Wei Yongjun1ac70e72007-12-20 14:36:44 -0800267 if (kmsg->msg_controllen < cmlen)
268 cmlen = kmsg->msg_controllen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 kmsg->msg_control += cmlen;
270 kmsg->msg_controllen -= cmlen;
271 return 0;
272}
273
274void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
275{
276 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
277 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
278 int fdnum = scm->fp->count;
279 struct file **fp = scm->fp->fp;
280 int __user *cmfptr;
281 int err = 0, i;
282
283 if (fdnum < fdmax)
284 fdmax = fdnum;
285
286 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
287 int new_fd;
288 err = security_file_receive(fp[i]);
289 if (err)
290 break;
Ulrich Drepper4a195422007-07-15 23:40:34 -0700291 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags
292 ? O_CLOEXEC : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 if (err < 0)
294 break;
295 new_fd = err;
296 err = put_user(new_fd, cmfptr);
297 if (err) {
298 put_unused_fd(new_fd);
299 break;
300 }
301 /* Bump the usage count and install the file. */
302 get_file(fp[i]);
303 fd_install(new_fd, fp[i]);
304 }
305
306 if (i > 0) {
307 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
Miklos Szeredieffee6a2006-10-09 21:42:14 -0700308 err = put_user(SOL_SOCKET, &cm->cmsg_level);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 if (!err)
310 err = put_user(SCM_RIGHTS, &cm->cmsg_type);
311 if (!err)
312 err = put_user(cmlen, &cm->cmsg_len);
313 if (!err) {
314 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
315 kmsg->msg_control += cmlen;
316 kmsg->msg_controllen -= cmlen;
317 }
318 }
319 if (i < fdnum)
320 kmsg->msg_flags |= MSG_CTRUNC;
321
322 /*
323 * All of the files that fit in the message have had their
324 * usage counts incremented, so we just free the list.
325 */
326 __scm_destroy(scm);
327}
328
329/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 * A struct sock_filter is architecture independent.
331 */
332struct compat_sock_fprog {
333 u16 len;
334 compat_uptr_t filter; /* struct sock_filter * */
335};
336
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800337static int do_set_attach_filter(struct socket *sock, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700338 char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339{
340 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
YOSHIFUJI Hideaki4768fbc2007-02-09 23:25:31 +0900341 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 compat_uptr_t ptr;
343 u16 len;
344
345 if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) ||
346 !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) ||
347 __get_user(len, &fprog32->len) ||
348 __get_user(ptr, &fprog32->filter) ||
349 __put_user(len, &kfprog->len) ||
350 __put_user(compat_ptr(ptr), &kfprog->filter))
351 return -EFAULT;
352
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800353 return sock_setsockopt(sock, level, optname, (char __user *)kfprog,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 sizeof(struct sock_fprog));
355}
356
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800357static int do_set_sock_timeout(struct socket *sock, int level,
David S. Millerb7058842009-09-30 16:12:20 -0700358 int optname, char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359{
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700360 struct compat_timeval __user *up = (struct compat_timeval __user *)optval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 struct timeval ktime;
362 mm_segment_t old_fs;
363 int err;
364
365 if (optlen < sizeof(*up))
366 return -EINVAL;
367 if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
368 __get_user(ktime.tv_sec, &up->tv_sec) ||
369 __get_user(ktime.tv_usec, &up->tv_usec))
370 return -EFAULT;
371 old_fs = get_fs();
372 set_fs(KERNEL_DS);
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700373 err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 set_fs(old_fs);
375
376 return err;
377}
378
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800379static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700380 char __user *optval, unsigned int optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800381{
382 if (optname == SO_ATTACH_FILTER)
383 return do_set_attach_filter(sock, level, optname,
384 optval, optlen);
385 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
386 return do_set_sock_timeout(sock, level, optname, optval, optlen);
387
388 return sock_setsockopt(sock, level, optname, optval, optlen);
389}
390
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700392 char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393{
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800394 int err;
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700395 struct socket *sock = sockfd_lookup(fd, &err);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800396
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700397 if (sock) {
398 err = security_socket_setsockopt(sock, level, optname);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800399 if (err) {
400 sockfd_put(sock);
401 return err;
402 }
403
404 if (level == SOL_SOCKET)
405 err = compat_sock_setsockopt(sock, level,
406 optname, optval, optlen);
407 else if (sock->ops->compat_setsockopt)
408 err = sock->ops->compat_setsockopt(sock, level,
409 optname, optval, optlen);
410 else
411 err = sock->ops->setsockopt(sock, level,
412 optname, optval, optlen);
413 sockfd_put(sock);
414 }
415 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416}
417
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800418static int do_get_sock_timeout(struct socket *sock, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 char __user *optval, int __user *optlen)
420{
421 struct compat_timeval __user *up;
422 struct timeval ktime;
423 mm_segment_t old_fs;
424 int len, err;
425
426 up = (struct compat_timeval __user *) optval;
427 if (get_user(len, optlen))
428 return -EFAULT;
429 if (len < sizeof(*up))
430 return -EINVAL;
431 len = sizeof(ktime);
432 old_fs = get_fs();
433 set_fs(KERNEL_DS);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800434 err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 set_fs(old_fs);
436
437 if (!err) {
438 if (put_user(sizeof(*up), optlen) ||
439 !access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
440 __put_user(ktime.tv_sec, &up->tv_sec) ||
441 __put_user(ktime.tv_usec, &up->tv_usec))
442 err = -EFAULT;
443 }
444 return err;
445}
446
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800447static int compat_sock_getsockopt(struct socket *sock, int level, int optname,
448 char __user *optval, int __user *optlen)
449{
450 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
451 return do_get_sock_timeout(sock, level, optname, optval, optlen);
452 return sock_getsockopt(sock, level, optname, optval, optlen);
453}
454
Shaun Pereiraf0ac2612006-03-21 23:59:39 -0800455int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
456{
457 struct compat_timeval __user *ctv =
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700458 (struct compat_timeval __user *) userstamp;
Shaun Pereiraf0ac2612006-03-21 23:59:39 -0800459 int err = -ENOENT;
Eric Dumazetb7aa0bf2007-04-19 16:16:32 -0700460 struct timeval tv;
Shaun Pereiraf0ac2612006-03-21 23:59:39 -0800461
462 if (!sock_flag(sk, SOCK_TIMESTAMP))
Patrick Ohly20d49472009-02-12 05:03:38 +0000463 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
Eric Dumazetb7aa0bf2007-04-19 16:16:32 -0700464 tv = ktime_to_timeval(sk->sk_stamp);
465 if (tv.tv_sec == -1)
Shaun Pereiraf0ac2612006-03-21 23:59:39 -0800466 return err;
Eric Dumazetb7aa0bf2007-04-19 16:16:32 -0700467 if (tv.tv_sec == 0) {
468 sk->sk_stamp = ktime_get_real();
469 tv = ktime_to_timeval(sk->sk_stamp);
470 }
471 err = 0;
472 if (put_user(tv.tv_sec, &ctv->tv_sec) ||
473 put_user(tv.tv_usec, &ctv->tv_usec))
Shaun Pereiraf0ac2612006-03-21 23:59:39 -0800474 err = -EFAULT;
475 return err;
476}
477EXPORT_SYMBOL(compat_sock_get_timestamp);
478
Eric Dumazetae40eb12007-03-18 17:33:16 -0700479int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp)
480{
481 struct compat_timespec __user *ctv =
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700482 (struct compat_timespec __user *) userstamp;
Eric Dumazetae40eb12007-03-18 17:33:16 -0700483 int err = -ENOENT;
484 struct timespec ts;
485
486 if (!sock_flag(sk, SOCK_TIMESTAMP))
Patrick Ohly20d49472009-02-12 05:03:38 +0000487 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
Eric Dumazetae40eb12007-03-18 17:33:16 -0700488 ts = ktime_to_timespec(sk->sk_stamp);
489 if (ts.tv_sec == -1)
490 return err;
491 if (ts.tv_sec == 0) {
492 sk->sk_stamp = ktime_get_real();
493 ts = ktime_to_timespec(sk->sk_stamp);
494 }
495 err = 0;
496 if (put_user(ts.tv_sec, &ctv->tv_sec) ||
497 put_user(ts.tv_nsec, &ctv->tv_nsec))
498 err = -EFAULT;
499 return err;
500}
501EXPORT_SYMBOL(compat_sock_get_timestampns);
502
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
504 char __user *optval, int __user *optlen)
505{
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800506 int err;
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700507 struct socket *sock = sockfd_lookup(fd, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700509 if (sock) {
510 err = security_socket_getsockopt(sock, level, optname);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800511 if (err) {
512 sockfd_put(sock);
513 return err;
514 }
515
516 if (level == SOL_SOCKET)
517 err = compat_sock_getsockopt(sock, level,
518 optname, optval, optlen);
519 else if (sock->ops->compat_getsockopt)
520 err = sock->ops->compat_getsockopt(sock, level,
521 optname, optval, optlen);
522 else
523 err = sock->ops->getsockopt(sock, level,
524 optname, optval, optlen);
525 sockfd_put(sock);
526 }
527 return err;
528}
David L Stevensdae50292008-04-27 01:06:07 -0700529
530struct compat_group_req {
531 __u32 gr_interface;
532 struct __kernel_sockaddr_storage gr_group
533 __attribute__ ((aligned(4)));
Eric Dumazetbc105022010-06-03 03:21:52 -0700534} __packed;
David L Stevensdae50292008-04-27 01:06:07 -0700535
536struct compat_group_source_req {
537 __u32 gsr_interface;
538 struct __kernel_sockaddr_storage gsr_group
539 __attribute__ ((aligned(4)));
540 struct __kernel_sockaddr_storage gsr_source
541 __attribute__ ((aligned(4)));
Eric Dumazetbc105022010-06-03 03:21:52 -0700542} __packed;
David L Stevensdae50292008-04-27 01:06:07 -0700543
544struct compat_group_filter {
545 __u32 gf_interface;
546 struct __kernel_sockaddr_storage gf_group
547 __attribute__ ((aligned(4)));
548 __u32 gf_fmode;
549 __u32 gf_numsrc;
550 struct __kernel_sockaddr_storage gf_slist[1]
551 __attribute__ ((aligned(4)));
Eric Dumazetbc105022010-06-03 03:21:52 -0700552} __packed;
David L Stevensdae50292008-04-27 01:06:07 -0700553
David L Stevensbe666e0a2008-04-29 03:23:00 -0700554#define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \
555 sizeof(struct __kernel_sockaddr_storage))
556
David L Stevensdae50292008-04-27 01:06:07 -0700557
558int compat_mc_setsockopt(struct sock *sock, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700559 char __user *optval, unsigned int optlen,
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700560 int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int))
David L Stevensdae50292008-04-27 01:06:07 -0700561{
562 char __user *koptval = optval;
563 int koptlen = optlen;
564
565 switch (optname) {
566 case MCAST_JOIN_GROUP:
567 case MCAST_LEAVE_GROUP:
568 {
569 struct compat_group_req __user *gr32 = (void *)optval;
570 struct group_req __user *kgr =
571 compat_alloc_user_space(sizeof(struct group_req));
572 u32 interface;
573
574 if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) ||
575 !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) ||
576 __get_user(interface, &gr32->gr_interface) ||
577 __put_user(interface, &kgr->gr_interface) ||
578 copy_in_user(&kgr->gr_group, &gr32->gr_group,
579 sizeof(kgr->gr_group)))
580 return -EFAULT;
581 koptval = (char __user *)kgr;
582 koptlen = sizeof(struct group_req);
583 break;
584 }
585 case MCAST_JOIN_SOURCE_GROUP:
586 case MCAST_LEAVE_SOURCE_GROUP:
587 case MCAST_BLOCK_SOURCE:
588 case MCAST_UNBLOCK_SOURCE:
589 {
590 struct compat_group_source_req __user *gsr32 = (void *)optval;
David L Stevensbe666e0a2008-04-29 03:23:00 -0700591 struct group_source_req __user *kgsr = compat_alloc_user_space(
David L Stevensdae50292008-04-27 01:06:07 -0700592 sizeof(struct group_source_req));
593 u32 interface;
594
595 if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) ||
596 !access_ok(VERIFY_WRITE, kgsr,
597 sizeof(struct group_source_req)) ||
598 __get_user(interface, &gsr32->gsr_interface) ||
599 __put_user(interface, &kgsr->gsr_interface) ||
600 copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group,
601 sizeof(kgsr->gsr_group)) ||
602 copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source,
603 sizeof(kgsr->gsr_source)))
604 return -EFAULT;
605 koptval = (char __user *)kgsr;
606 koptlen = sizeof(struct group_source_req);
607 break;
608 }
609 case MCAST_MSFILTER:
610 {
611 struct compat_group_filter __user *gf32 = (void *)optval;
David L Stevensbe666e0a2008-04-29 03:23:00 -0700612 struct group_filter __user *kgf;
David L Stevensdae50292008-04-27 01:06:07 -0700613 u32 interface, fmode, numsrc;
614
David L Stevensbe666e0a2008-04-29 03:23:00 -0700615 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
David L Stevensdae50292008-04-27 01:06:07 -0700616 __get_user(interface, &gf32->gf_interface) ||
617 __get_user(fmode, &gf32->gf_fmode) ||
618 __get_user(numsrc, &gf32->gf_numsrc))
619 return -EFAULT;
620 koptlen = optlen + sizeof(struct group_filter) -
621 sizeof(struct compat_group_filter);
622 if (koptlen < GROUP_FILTER_SIZE(numsrc))
623 return -EINVAL;
624 kgf = compat_alloc_user_space(koptlen);
625 if (!access_ok(VERIFY_WRITE, kgf, koptlen) ||
626 __put_user(interface, &kgf->gf_interface) ||
627 __put_user(fmode, &kgf->gf_fmode) ||
628 __put_user(numsrc, &kgf->gf_numsrc) ||
629 copy_in_user(&kgf->gf_group, &gf32->gf_group,
630 sizeof(kgf->gf_group)) ||
David L Stevensbe666e0a2008-04-29 03:23:00 -0700631 (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist,
David L Stevensdae50292008-04-27 01:06:07 -0700632 numsrc * sizeof(kgf->gf_slist[0]))))
633 return -EFAULT;
634 koptval = (char __user *)kgf;
635 break;
636 }
637
638 default:
639 break;
640 }
641 return setsockopt(sock, level, optname, koptval, koptlen);
642}
David L Stevensdae50292008-04-27 01:06:07 -0700643EXPORT_SYMBOL(compat_mc_setsockopt);
644
David L Stevens42908c62008-04-29 03:23:22 -0700645int compat_mc_getsockopt(struct sock *sock, int level, int optname,
646 char __user *optval, int __user *optlen,
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700647 int (*getsockopt)(struct sock *, int, int, char __user *, int __user *))
David L Stevens42908c62008-04-29 03:23:22 -0700648{
649 struct compat_group_filter __user *gf32 = (void *)optval;
650 struct group_filter __user *kgf;
651 int __user *koptlen;
652 u32 interface, fmode, numsrc;
653 int klen, ulen, err;
654
655 if (optname != MCAST_MSFILTER)
656 return getsockopt(sock, level, optname, optval, optlen);
657
658 koptlen = compat_alloc_user_space(sizeof(*koptlen));
659 if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) ||
660 __get_user(ulen, optlen))
661 return -EFAULT;
662
663 /* adjust len for pad */
664 klen = ulen + sizeof(*kgf) - sizeof(*gf32);
665
666 if (klen < GROUP_FILTER_SIZE(0))
667 return -EINVAL;
668
669 if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) ||
670 __put_user(klen, koptlen))
671 return -EFAULT;
672
673 /* have to allow space for previous compat_alloc_user_space, too */
674 kgf = compat_alloc_user_space(klen+sizeof(*optlen));
675
676 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
677 __get_user(interface, &gf32->gf_interface) ||
678 __get_user(fmode, &gf32->gf_fmode) ||
679 __get_user(numsrc, &gf32->gf_numsrc) ||
680 __put_user(interface, &kgf->gf_interface) ||
681 __put_user(fmode, &kgf->gf_fmode) ||
682 __put_user(numsrc, &kgf->gf_numsrc) ||
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700683 copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group)))
David L Stevens42908c62008-04-29 03:23:22 -0700684 return -EFAULT;
685
686 err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen);
687 if (err)
688 return err;
689
690 if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) ||
691 __get_user(klen, koptlen))
692 return -EFAULT;
693
694 ulen = klen - (sizeof(*kgf)-sizeof(*gf32));
695
696 if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) ||
697 __put_user(ulen, optlen))
698 return -EFAULT;
699
700 if (!access_ok(VERIFY_READ, kgf, klen) ||
701 !access_ok(VERIFY_WRITE, gf32, ulen) ||
702 __get_user(interface, &kgf->gf_interface) ||
703 __get_user(fmode, &kgf->gf_fmode) ||
704 __get_user(numsrc, &kgf->gf_numsrc) ||
705 __put_user(interface, &gf32->gf_interface) ||
706 __put_user(fmode, &gf32->gf_fmode) ||
707 __put_user(numsrc, &gf32->gf_numsrc))
708 return -EFAULT;
709 if (numsrc) {
710 int copylen;
711
712 klen -= GROUP_FILTER_SIZE(0);
713 copylen = numsrc * sizeof(gf32->gf_slist[0]);
714 if (copylen > klen)
715 copylen = klen;
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700716 if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen))
David L Stevens42908c62008-04-29 03:23:22 -0700717 return -EFAULT;
718 }
719 return err;
720}
David L Stevens42908c62008-04-29 03:23:22 -0700721EXPORT_SYMBOL(compat_mc_getsockopt);
722
David L Stevensdae50292008-04-27 01:06:07 -0700723
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724/* Argument list sizes for compat_sys_socketcall */
725#define AL(x) ((x) * sizeof(u32))
Anton Blanchard228e5482011-05-02 20:21:35 +0000726static unsigned char nas[21] = {
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700727 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
728 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
729 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
Anton Blanchard228e5482011-05-02 20:21:35 +0000730 AL(4), AL(5), AL(4)
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700731};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732#undef AL
733
734asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags)
735{
736 return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
737}
738
Anton Blanchard228e5482011-05-02 20:21:35 +0000739asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
740 unsigned vlen, unsigned int flags)
741{
742 return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
743 flags | MSG_CMSG_COMPAT);
744}
745
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
747{
748 return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
749}
750
Johannes Berg1dacc762009-07-01 11:26:02 +0000751asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned flags)
752{
753 return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT);
754}
755
756asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len,
757 unsigned flags, struct sockaddr __user *addr,
758 int __user *addrlen)
759{
760 return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen);
761}
762
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -0700763asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
764 unsigned vlen, unsigned int flags,
Heiko Carstens60c2ffd2009-12-09 20:58:16 +0000765 struct compat_timespec __user *timeout)
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -0700766{
767 int datagrams;
768 struct timespec ktspec;
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -0700769
Jean-Mickael Guerin5b231362009-12-01 07:52:16 +0000770 if (timeout == NULL)
771 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
772 flags | MSG_CMSG_COMPAT, NULL);
773
Heiko Carstensde039f02009-12-09 20:59:15 +0000774 if (get_compat_timespec(&ktspec, timeout))
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -0700775 return -EFAULT;
776
777 datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
778 flags | MSG_CMSG_COMPAT, &ktspec);
Heiko Carstensde039f02009-12-09 20:59:15 +0000779 if (datagrams > 0 && put_compat_timespec(&ktspec, timeout))
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -0700780 datagrams = -EFAULT;
781
782 return datagrams;
783}
784
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
786{
787 int ret;
788 u32 a[6];
789 u32 a0, a1;
YOSHIFUJI Hideaki4768fbc2007-02-09 23:25:31 +0900790
Anton Blanchard228e5482011-05-02 20:21:35 +0000791 if (call < SYS_SOCKET || call > SYS_SENDMMSG)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792 return -EINVAL;
793 if (copy_from_user(a, args, nas[call]))
794 return -EFAULT;
795 a0 = a[0];
796 a1 = a[1];
YOSHIFUJI Hideaki4768fbc2007-02-09 23:25:31 +0900797
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700798 switch (call) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 case SYS_SOCKET:
800 ret = sys_socket(a0, a1, a[2]);
801 break;
802 case SYS_BIND:
803 ret = sys_bind(a0, compat_ptr(a1), a[2]);
804 break;
805 case SYS_CONNECT:
806 ret = sys_connect(a0, compat_ptr(a1), a[2]);
807 break;
808 case SYS_LISTEN:
809 ret = sys_listen(a0, a1);
810 break;
811 case SYS_ACCEPT:
Ulrich Drepperde11def2008-11-19 15:36:14 -0800812 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813 break;
814 case SYS_GETSOCKNAME:
815 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
816 break;
817 case SYS_GETPEERNAME:
818 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
819 break;
820 case SYS_SOCKETPAIR:
821 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
822 break;
823 case SYS_SEND:
824 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
825 break;
826 case SYS_SENDTO:
827 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
828 break;
829 case SYS_RECV:
Johannes Berg1dacc762009-07-01 11:26:02 +0000830 ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 break;
832 case SYS_RECVFROM:
Johannes Berg1dacc762009-07-01 11:26:02 +0000833 ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
834 compat_ptr(a[4]), compat_ptr(a[5]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 break;
836 case SYS_SHUTDOWN:
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700837 ret = sys_shutdown(a0, a1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 break;
839 case SYS_SETSOCKOPT:
840 ret = compat_sys_setsockopt(a0, a1, a[2],
841 compat_ptr(a[3]), a[4]);
842 break;
843 case SYS_GETSOCKOPT:
844 ret = compat_sys_getsockopt(a0, a1, a[2],
845 compat_ptr(a[3]), compat_ptr(a[4]));
846 break;
847 case SYS_SENDMSG:
848 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
849 break;
Anton Blanchard228e5482011-05-02 20:21:35 +0000850 case SYS_SENDMMSG:
851 ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]);
852 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 case SYS_RECVMSG:
854 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
855 break;
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -0700856 case SYS_RECVMMSG:
857 ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3],
858 compat_ptr(a[4]));
859 break;
Ulrich Drepperde11def2008-11-19 15:36:14 -0800860 case SYS_ACCEPT4:
861 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]);
Ulrich Drepperaaca0bd2008-07-23 21:29:20 -0700862 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 default:
864 ret = -EINVAL;
865 break;
866 }
867 return ret;
868}