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Commit | Line | Data |
---|---|---|
4768fbcb | 1 | /* |
1da177e4 LT |
2 | * 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> | |
4768fbcb | 11 | * Copyright (C) 2000,2001 Andi Kleen, SuSE Labs |
1da177e4 LT |
12 | */ |
13 | ||
14 | #include <linux/kernel.h> | |
15 | #include <linux/fs.h> | |
1da177e4 LT |
16 | #include <linux/types.h> |
17 | #include <linux/file.h> | |
18 | #include <linux/icmpv6.h> | |
19 | #include <linux/socket.h> | |
20 | #include <linux/syscalls.h> | |
21 | #include <linux/filter.h> | |
22 | #include <linux/compat.h> | |
1da177e4 LT |
23 | #include <linux/security.h> |
24 | ||
25 | #include <net/scm.h> | |
26 | #include <net/sock.h> | |
dae50295 DS |
27 | #include <net/ip.h> |
28 | #include <net/ipv6.h> | |
1da177e4 LT |
29 | #include <asm/uaccess.h> |
30 | #include <net/compat.h> | |
31 | ||
32 | static inline int iov_from_user_compat_to_kern(struct iovec *kiov, | |
33 | struct compat_iovec __user *uiov32, | |
34 | int niov) | |
35 | { | |
36 | int tot_len = 0; | |
37 | ||
e71a4783 | 38 | while (niov > 0) { |
1da177e4 LT |
39 | compat_uptr_t buf; |
40 | compat_size_t len; | |
41 | ||
e71a4783 | 42 | if (get_user(len, &uiov32->iov_len) || |
1da177e4 LT |
43 | get_user(buf, &uiov32->iov_base)) { |
44 | tot_len = -EFAULT; | |
45 | break; | |
46 | } | |
47 | tot_len += len; | |
48 | kiov->iov_base = compat_ptr(buf); | |
49 | kiov->iov_len = (__kernel_size_t) len; | |
50 | uiov32++; | |
51 | kiov++; | |
52 | niov--; | |
53 | } | |
54 | return tot_len; | |
55 | } | |
56 | ||
57 | int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg) | |
58 | { | |
59 | compat_uptr_t tmp1, tmp2, tmp3; | |
60 | ||
61 | if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || | |
62 | __get_user(tmp1, &umsg->msg_name) || | |
63 | __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || | |
64 | __get_user(tmp2, &umsg->msg_iov) || | |
65 | __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) || | |
66 | __get_user(tmp3, &umsg->msg_control) || | |
67 | __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || | |
68 | __get_user(kmsg->msg_flags, &umsg->msg_flags)) | |
69 | return -EFAULT; | |
70 | kmsg->msg_name = compat_ptr(tmp1); | |
71 | kmsg->msg_iov = compat_ptr(tmp2); | |
72 | kmsg->msg_control = compat_ptr(tmp3); | |
73 | return 0; | |
74 | } | |
75 | ||
76 | /* I've named the args so it is easy to tell whose space the pointers are in. */ | |
77 | int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov, | |
230b1839 | 78 | struct sockaddr *kern_address, int mode) |
1da177e4 LT |
79 | { |
80 | int tot_len; | |
81 | ||
e71a4783 SH |
82 | if (kern_msg->msg_namelen) { |
83 | if (mode==VERIFY_READ) { | |
1da177e4 LT |
84 | int err = move_addr_to_kernel(kern_msg->msg_name, |
85 | kern_msg->msg_namelen, | |
86 | kern_address); | |
e71a4783 | 87 | if (err < 0) |
1da177e4 LT |
88 | return err; |
89 | } | |
90 | kern_msg->msg_name = kern_address; | |
91 | } else | |
92 | kern_msg->msg_name = NULL; | |
93 | ||
1da177e4 LT |
94 | tot_len = iov_from_user_compat_to_kern(kern_iov, |
95 | (struct compat_iovec __user *)kern_msg->msg_iov, | |
96 | kern_msg->msg_iovlen); | |
e71a4783 | 97 | if (tot_len >= 0) |
1da177e4 | 98 | kern_msg->msg_iov = kern_iov; |
1da177e4 LT |
99 | |
100 | return tot_len; | |
101 | } | |
102 | ||
103 | /* Bleech... */ | |
104 | #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) | |
105 | ||
106 | #define CMSG_COMPAT_DATA(cmsg) \ | |
107 | ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)))) | |
108 | #define CMSG_COMPAT_SPACE(len) \ | |
109 | (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len)) | |
110 | #define CMSG_COMPAT_LEN(len) \ | |
111 | (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len)) | |
112 | ||
113 | #define CMSG_COMPAT_FIRSTHDR(msg) \ | |
114 | (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \ | |
115 | (struct compat_cmsghdr __user *)((msg)->msg_control) : \ | |
116 | (struct compat_cmsghdr __user *)NULL) | |
117 | ||
118 | #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \ | |
119 | ((ucmlen) >= sizeof(struct compat_cmsghdr) && \ | |
120 | (ucmlen) <= (unsigned long) \ | |
121 | ((mhdr)->msg_controllen - \ | |
122 | ((char *)(ucmsg) - (char *)(mhdr)->msg_control))) | |
123 | ||
124 | static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg, | |
125 | struct compat_cmsghdr __user *cmsg, int cmsg_len) | |
126 | { | |
127 | char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len); | |
128 | if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) > | |
129 | msg->msg_controllen) | |
130 | return NULL; | |
131 | return (struct compat_cmsghdr __user *)ptr; | |
132 | } | |
133 | ||
134 | /* There is a lot of hair here because the alignment rules (and | |
135 | * thus placement) of cmsg headers and length are different for | |
136 | * 32-bit apps. -DaveM | |
137 | */ | |
8920e8f9 | 138 | int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, |
1da177e4 LT |
139 | unsigned char *stackbuf, int stackbuf_size) |
140 | { | |
141 | struct compat_cmsghdr __user *ucmsg; | |
142 | struct cmsghdr *kcmsg, *kcmsg_base; | |
143 | compat_size_t ucmlen; | |
144 | __kernel_size_t kcmlen, tmp; | |
8920e8f9 | 145 | int err = -EFAULT; |
1da177e4 LT |
146 | |
147 | kcmlen = 0; | |
148 | kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; | |
149 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); | |
e71a4783 SH |
150 | while (ucmsg != NULL) { |
151 | if (get_user(ucmlen, &ucmsg->cmsg_len)) | |
1da177e4 LT |
152 | return -EFAULT; |
153 | ||
154 | /* Catch bogons. */ | |
155 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) | |
156 | return -EINVAL; | |
157 | ||
158 | tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + | |
159 | CMSG_ALIGN(sizeof(struct cmsghdr))); | |
8920e8f9 | 160 | tmp = CMSG_ALIGN(tmp); |
1da177e4 LT |
161 | kcmlen += tmp; |
162 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); | |
163 | } | |
e71a4783 | 164 | if (kcmlen == 0) |
1da177e4 LT |
165 | return -EINVAL; |
166 | ||
167 | /* The kcmlen holds the 64-bit version of the control length. | |
168 | * It may not be modified as we do not stick it into the kmsg | |
169 | * until we have successfully copied over all of the data | |
170 | * from the user. | |
171 | */ | |
8920e8f9 AV |
172 | if (kcmlen > stackbuf_size) |
173 | kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); | |
174 | if (kcmsg == NULL) | |
1da177e4 LT |
175 | return -ENOBUFS; |
176 | ||
177 | /* Now copy them over neatly. */ | |
178 | memset(kcmsg, 0, kcmlen); | |
179 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); | |
e71a4783 | 180 | while (ucmsg != NULL) { |
8920e8f9 AV |
181 | if (__get_user(ucmlen, &ucmsg->cmsg_len)) |
182 | goto Efault; | |
183 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) | |
184 | goto Einval; | |
1da177e4 LT |
185 | tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + |
186 | CMSG_ALIGN(sizeof(struct cmsghdr))); | |
8920e8f9 AV |
187 | if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) |
188 | goto Einval; | |
1da177e4 | 189 | kcmsg->cmsg_len = tmp; |
8920e8f9 AV |
190 | tmp = CMSG_ALIGN(tmp); |
191 | if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) || | |
192 | __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) || | |
193 | copy_from_user(CMSG_DATA(kcmsg), | |
194 | CMSG_COMPAT_DATA(ucmsg), | |
195 | (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))))) | |
196 | goto Efault; | |
1da177e4 LT |
197 | |
198 | /* Advance. */ | |
8920e8f9 | 199 | kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); |
1da177e4 LT |
200 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); |
201 | } | |
202 | ||
203 | /* Ok, looks like we made it. Hook it up and return success. */ | |
204 | kmsg->msg_control = kcmsg_base; | |
205 | kmsg->msg_controllen = kcmlen; | |
206 | return 0; | |
207 | ||
8920e8f9 AV |
208 | Einval: |
209 | err = -EINVAL; | |
210 | Efault: | |
211 | if (kcmsg_base != (struct cmsghdr *)stackbuf) | |
212 | sock_kfree_s(sk, kcmsg_base, kcmlen); | |
213 | return err; | |
1da177e4 LT |
214 | } |
215 | ||
216 | int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) | |
217 | { | |
218 | struct compat_timeval ctv; | |
20d49473 | 219 | struct compat_timespec cts[3]; |
1da177e4 LT |
220 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; |
221 | struct compat_cmsghdr cmhdr; | |
222 | int cmlen; | |
223 | ||
e71a4783 | 224 | if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { |
1da177e4 LT |
225 | kmsg->msg_flags |= MSG_CTRUNC; |
226 | return 0; /* XXX: return error? check spec. */ | |
227 | } | |
228 | ||
d35aac10 | 229 | if (level == SOL_SOCKET && type == SCM_TIMESTAMP) { |
1da177e4 LT |
230 | struct timeval *tv = (struct timeval *)data; |
231 | ctv.tv_sec = tv->tv_sec; | |
232 | ctv.tv_usec = tv->tv_usec; | |
233 | data = &ctv; | |
92f37fd2 ED |
234 | len = sizeof(ctv); |
235 | } | |
20d49473 PO |
236 | if (level == SOL_SOCKET && |
237 | (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) { | |
238 | int count = type == SCM_TIMESTAMPNS ? 1 : 3; | |
239 | int i; | |
92f37fd2 | 240 | struct timespec *ts = (struct timespec *)data; |
20d49473 PO |
241 | for (i = 0; i < count; i++) { |
242 | cts[i].tv_sec = ts[i].tv_sec; | |
243 | cts[i].tv_nsec = ts[i].tv_nsec; | |
244 | } | |
92f37fd2 | 245 | data = &cts; |
20d49473 | 246 | len = sizeof(cts[0]) * count; |
4768fbcb YH |
247 | } |
248 | ||
1da177e4 | 249 | cmlen = CMSG_COMPAT_LEN(len); |
e71a4783 | 250 | if (kmsg->msg_controllen < cmlen) { |
1da177e4 LT |
251 | kmsg->msg_flags |= MSG_CTRUNC; |
252 | cmlen = kmsg->msg_controllen; | |
253 | } | |
254 | cmhdr.cmsg_level = level; | |
255 | cmhdr.cmsg_type = type; | |
256 | cmhdr.cmsg_len = cmlen; | |
257 | ||
e71a4783 | 258 | if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) |
1da177e4 | 259 | return -EFAULT; |
e71a4783 | 260 | if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) |
1da177e4 LT |
261 | return -EFAULT; |
262 | cmlen = CMSG_COMPAT_SPACE(len); | |
1ac70e7a WY |
263 | if (kmsg->msg_controllen < cmlen) |
264 | cmlen = kmsg->msg_controllen; | |
1da177e4 LT |
265 | kmsg->msg_control += cmlen; |
266 | kmsg->msg_controllen -= cmlen; | |
267 | return 0; | |
268 | } | |
269 | ||
270 | void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) | |
271 | { | |
272 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; | |
273 | int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); | |
274 | int fdnum = scm->fp->count; | |
275 | struct file **fp = scm->fp->fp; | |
276 | int __user *cmfptr; | |
277 | int err = 0, i; | |
278 | ||
279 | if (fdnum < fdmax) | |
280 | fdmax = fdnum; | |
281 | ||
282 | for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { | |
283 | int new_fd; | |
284 | err = security_file_receive(fp[i]); | |
285 | if (err) | |
286 | break; | |
4a19542e UD |
287 | err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags |
288 | ? O_CLOEXEC : 0); | |
1da177e4 LT |
289 | if (err < 0) |
290 | break; | |
291 | new_fd = err; | |
292 | err = put_user(new_fd, cmfptr); | |
293 | if (err) { | |
294 | put_unused_fd(new_fd); | |
295 | break; | |
296 | } | |
297 | /* Bump the usage count and install the file. */ | |
298 | get_file(fp[i]); | |
299 | fd_install(new_fd, fp[i]); | |
300 | } | |
301 | ||
302 | if (i > 0) { | |
303 | int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); | |
effee6a0 | 304 | err = put_user(SOL_SOCKET, &cm->cmsg_level); |
1da177e4 LT |
305 | if (!err) |
306 | err = put_user(SCM_RIGHTS, &cm->cmsg_type); | |
307 | if (!err) | |
308 | err = put_user(cmlen, &cm->cmsg_len); | |
309 | if (!err) { | |
310 | cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); | |
311 | kmsg->msg_control += cmlen; | |
312 | kmsg->msg_controllen -= cmlen; | |
313 | } | |
314 | } | |
315 | if (i < fdnum) | |
316 | kmsg->msg_flags |= MSG_CTRUNC; | |
317 | ||
318 | /* | |
319 | * All of the files that fit in the message have had their | |
320 | * usage counts incremented, so we just free the list. | |
321 | */ | |
322 | __scm_destroy(scm); | |
323 | } | |
324 | ||
1da177e4 LT |
325 | /* |
326 | * A struct sock_filter is architecture independent. | |
327 | */ | |
328 | struct compat_sock_fprog { | |
329 | u16 len; | |
330 | compat_uptr_t filter; /* struct sock_filter * */ | |
331 | }; | |
332 | ||
3fdadf7d | 333 | static int do_set_attach_filter(struct socket *sock, int level, int optname, |
b7058842 | 334 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
335 | { |
336 | struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; | |
4768fbcb | 337 | struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); |
1da177e4 LT |
338 | compat_uptr_t ptr; |
339 | u16 len; | |
340 | ||
341 | if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) || | |
342 | !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) || | |
343 | __get_user(len, &fprog32->len) || | |
344 | __get_user(ptr, &fprog32->filter) || | |
345 | __put_user(len, &kfprog->len) || | |
346 | __put_user(compat_ptr(ptr), &kfprog->filter)) | |
347 | return -EFAULT; | |
348 | ||
3fdadf7d | 349 | return sock_setsockopt(sock, level, optname, (char __user *)kfprog, |
1da177e4 LT |
350 | sizeof(struct sock_fprog)); |
351 | } | |
352 | ||
3fdadf7d | 353 | static int do_set_sock_timeout(struct socket *sock, int level, |
b7058842 | 354 | int optname, char __user *optval, unsigned int optlen) |
1da177e4 LT |
355 | { |
356 | struct compat_timeval __user *up = (struct compat_timeval __user *) optval; | |
357 | struct timeval ktime; | |
358 | mm_segment_t old_fs; | |
359 | int err; | |
360 | ||
361 | if (optlen < sizeof(*up)) | |
362 | return -EINVAL; | |
363 | if (!access_ok(VERIFY_READ, up, sizeof(*up)) || | |
364 | __get_user(ktime.tv_sec, &up->tv_sec) || | |
365 | __get_user(ktime.tv_usec, &up->tv_usec)) | |
366 | return -EFAULT; | |
367 | old_fs = get_fs(); | |
368 | set_fs(KERNEL_DS); | |
3fdadf7d | 369 | err = sock_setsockopt(sock, level, optname, (char *) &ktime, sizeof(ktime)); |
1da177e4 LT |
370 | set_fs(old_fs); |
371 | ||
372 | return err; | |
373 | } | |
374 | ||
3fdadf7d | 375 | static int compat_sock_setsockopt(struct socket *sock, int level, int optname, |
b7058842 | 376 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
377 | { |
378 | if (optname == SO_ATTACH_FILTER) | |
379 | return do_set_attach_filter(sock, level, optname, | |
380 | optval, optlen); | |
381 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) | |
382 | return do_set_sock_timeout(sock, level, optname, optval, optlen); | |
383 | ||
384 | return sock_setsockopt(sock, level, optname, optval, optlen); | |
385 | } | |
386 | ||
1da177e4 | 387 | asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, |
b7058842 | 388 | char __user *optval, unsigned int optlen) |
1da177e4 | 389 | { |
3fdadf7d DM |
390 | int err; |
391 | struct socket *sock; | |
392 | ||
3fdadf7d DM |
393 | if ((sock = sockfd_lookup(fd, &err))!=NULL) |
394 | { | |
395 | err = security_socket_setsockopt(sock,level,optname); | |
396 | if (err) { | |
397 | sockfd_put(sock); | |
398 | return err; | |
399 | } | |
400 | ||
401 | if (level == SOL_SOCKET) | |
402 | err = compat_sock_setsockopt(sock, level, | |
403 | optname, optval, optlen); | |
404 | else if (sock->ops->compat_setsockopt) | |
405 | err = sock->ops->compat_setsockopt(sock, level, | |
406 | optname, optval, optlen); | |
407 | else | |
408 | err = sock->ops->setsockopt(sock, level, | |
409 | optname, optval, optlen); | |
410 | sockfd_put(sock); | |
411 | } | |
412 | return err; | |
1da177e4 LT |
413 | } |
414 | ||
3fdadf7d | 415 | static int do_get_sock_timeout(struct socket *sock, int level, int optname, |
1da177e4 LT |
416 | char __user *optval, int __user *optlen) |
417 | { | |
418 | struct compat_timeval __user *up; | |
419 | struct timeval ktime; | |
420 | mm_segment_t old_fs; | |
421 | int len, err; | |
422 | ||
423 | up = (struct compat_timeval __user *) optval; | |
424 | if (get_user(len, optlen)) | |
425 | return -EFAULT; | |
426 | if (len < sizeof(*up)) | |
427 | return -EINVAL; | |
428 | len = sizeof(ktime); | |
429 | old_fs = get_fs(); | |
430 | set_fs(KERNEL_DS); | |
3fdadf7d | 431 | err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); |
1da177e4 LT |
432 | set_fs(old_fs); |
433 | ||
434 | if (!err) { | |
435 | if (put_user(sizeof(*up), optlen) || | |
436 | !access_ok(VERIFY_WRITE, up, sizeof(*up)) || | |
437 | __put_user(ktime.tv_sec, &up->tv_sec) || | |
438 | __put_user(ktime.tv_usec, &up->tv_usec)) | |
439 | err = -EFAULT; | |
440 | } | |
441 | return err; | |
442 | } | |
443 | ||
3fdadf7d | 444 | static int compat_sock_getsockopt(struct socket *sock, int level, int optname, |
1da177e4 LT |
445 | char __user *optval, int __user *optlen) |
446 | { | |
3fdadf7d DM |
447 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) |
448 | return do_get_sock_timeout(sock, level, optname, optval, optlen); | |
449 | return sock_getsockopt(sock, level, optname, optval, optlen); | |
1da177e4 LT |
450 | } |
451 | ||
f0ac2614 SP |
452 | int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) |
453 | { | |
454 | struct compat_timeval __user *ctv = | |
455 | (struct compat_timeval __user*) userstamp; | |
456 | int err = -ENOENT; | |
b7aa0bf7 | 457 | struct timeval tv; |
f0ac2614 SP |
458 | |
459 | if (!sock_flag(sk, SOCK_TIMESTAMP)) | |
20d49473 | 460 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
b7aa0bf7 ED |
461 | tv = ktime_to_timeval(sk->sk_stamp); |
462 | if (tv.tv_sec == -1) | |
f0ac2614 | 463 | return err; |
b7aa0bf7 ED |
464 | if (tv.tv_sec == 0) { |
465 | sk->sk_stamp = ktime_get_real(); | |
466 | tv = ktime_to_timeval(sk->sk_stamp); | |
467 | } | |
468 | err = 0; | |
469 | if (put_user(tv.tv_sec, &ctv->tv_sec) || | |
470 | put_user(tv.tv_usec, &ctv->tv_usec)) | |
f0ac2614 SP |
471 | err = -EFAULT; |
472 | return err; | |
473 | } | |
474 | EXPORT_SYMBOL(compat_sock_get_timestamp); | |
475 | ||
ae40eb1e ED |
476 | int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) |
477 | { | |
478 | struct compat_timespec __user *ctv = | |
479 | (struct compat_timespec __user*) userstamp; | |
480 | int err = -ENOENT; | |
481 | struct timespec ts; | |
482 | ||
483 | if (!sock_flag(sk, SOCK_TIMESTAMP)) | |
20d49473 | 484 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
ae40eb1e ED |
485 | ts = ktime_to_timespec(sk->sk_stamp); |
486 | if (ts.tv_sec == -1) | |
487 | return err; | |
488 | if (ts.tv_sec == 0) { | |
489 | sk->sk_stamp = ktime_get_real(); | |
490 | ts = ktime_to_timespec(sk->sk_stamp); | |
491 | } | |
492 | err = 0; | |
493 | if (put_user(ts.tv_sec, &ctv->tv_sec) || | |
494 | put_user(ts.tv_nsec, &ctv->tv_nsec)) | |
495 | err = -EFAULT; | |
496 | return err; | |
497 | } | |
498 | EXPORT_SYMBOL(compat_sock_get_timestampns); | |
499 | ||
3fdadf7d DM |
500 | asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, |
501 | char __user *optval, int __user *optlen) | |
502 | { | |
503 | int err; | |
504 | struct socket *sock; | |
505 | ||
506 | if ((sock = sockfd_lookup(fd, &err))!=NULL) | |
507 | { | |
508 | err = security_socket_getsockopt(sock, level, | |
509 | optname); | |
510 | if (err) { | |
511 | sockfd_put(sock); | |
512 | return err; | |
513 | } | |
514 | ||
515 | if (level == SOL_SOCKET) | |
516 | err = compat_sock_getsockopt(sock, level, | |
517 | optname, optval, optlen); | |
518 | else if (sock->ops->compat_getsockopt) | |
519 | err = sock->ops->compat_getsockopt(sock, level, | |
520 | optname, optval, optlen); | |
521 | else | |
522 | err = sock->ops->getsockopt(sock, level, | |
523 | optname, optval, optlen); | |
524 | sockfd_put(sock); | |
525 | } | |
526 | return err; | |
527 | } | |
dae50295 DS |
528 | |
529 | struct compat_group_req { | |
530 | __u32 gr_interface; | |
531 | struct __kernel_sockaddr_storage gr_group | |
532 | __attribute__ ((aligned(4))); | |
533 | } __attribute__ ((packed)); | |
534 | ||
535 | struct compat_group_source_req { | |
536 | __u32 gsr_interface; | |
537 | struct __kernel_sockaddr_storage gsr_group | |
538 | __attribute__ ((aligned(4))); | |
539 | struct __kernel_sockaddr_storage gsr_source | |
540 | __attribute__ ((aligned(4))); | |
541 | } __attribute__ ((packed)); | |
542 | ||
543 | struct compat_group_filter { | |
544 | __u32 gf_interface; | |
545 | struct __kernel_sockaddr_storage gf_group | |
546 | __attribute__ ((aligned(4))); | |
547 | __u32 gf_fmode; | |
548 | __u32 gf_numsrc; | |
549 | struct __kernel_sockaddr_storage gf_slist[1] | |
550 | __attribute__ ((aligned(4))); | |
551 | } __attribute__ ((packed)); | |
552 | ||
be666e0a DS |
553 | #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \ |
554 | sizeof(struct __kernel_sockaddr_storage)) | |
555 | ||
dae50295 DS |
556 | |
557 | int compat_mc_setsockopt(struct sock *sock, int level, int optname, | |
b7058842 DM |
558 | char __user *optval, unsigned int optlen, |
559 | int (*setsockopt)(struct sock *,int,int,char __user *,unsigned int)) | |
dae50295 DS |
560 | { |
561 | char __user *koptval = optval; | |
562 | int koptlen = optlen; | |
563 | ||
564 | switch (optname) { | |
565 | case MCAST_JOIN_GROUP: | |
566 | case MCAST_LEAVE_GROUP: | |
567 | { | |
568 | struct compat_group_req __user *gr32 = (void *)optval; | |
569 | struct group_req __user *kgr = | |
570 | compat_alloc_user_space(sizeof(struct group_req)); | |
571 | u32 interface; | |
572 | ||
573 | if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) || | |
574 | !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) || | |
575 | __get_user(interface, &gr32->gr_interface) || | |
576 | __put_user(interface, &kgr->gr_interface) || | |
577 | copy_in_user(&kgr->gr_group, &gr32->gr_group, | |
578 | sizeof(kgr->gr_group))) | |
579 | return -EFAULT; | |
580 | koptval = (char __user *)kgr; | |
581 | koptlen = sizeof(struct group_req); | |
582 | break; | |
583 | } | |
584 | case MCAST_JOIN_SOURCE_GROUP: | |
585 | case MCAST_LEAVE_SOURCE_GROUP: | |
586 | case MCAST_BLOCK_SOURCE: | |
587 | case MCAST_UNBLOCK_SOURCE: | |
588 | { | |
589 | struct compat_group_source_req __user *gsr32 = (void *)optval; | |
be666e0a | 590 | struct group_source_req __user *kgsr = compat_alloc_user_space( |
dae50295 DS |
591 | sizeof(struct group_source_req)); |
592 | u32 interface; | |
593 | ||
594 | if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) || | |
595 | !access_ok(VERIFY_WRITE, kgsr, | |
596 | sizeof(struct group_source_req)) || | |
597 | __get_user(interface, &gsr32->gsr_interface) || | |
598 | __put_user(interface, &kgsr->gsr_interface) || | |
599 | copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group, | |
600 | sizeof(kgsr->gsr_group)) || | |
601 | copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source, | |
602 | sizeof(kgsr->gsr_source))) | |
603 | return -EFAULT; | |
604 | koptval = (char __user *)kgsr; | |
605 | koptlen = sizeof(struct group_source_req); | |
606 | break; | |
607 | } | |
608 | case MCAST_MSFILTER: | |
609 | { | |
610 | struct compat_group_filter __user *gf32 = (void *)optval; | |
be666e0a | 611 | struct group_filter __user *kgf; |
dae50295 DS |
612 | u32 interface, fmode, numsrc; |
613 | ||
be666e0a | 614 | if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || |
dae50295 DS |
615 | __get_user(interface, &gf32->gf_interface) || |
616 | __get_user(fmode, &gf32->gf_fmode) || | |
617 | __get_user(numsrc, &gf32->gf_numsrc)) | |
618 | return -EFAULT; | |
619 | koptlen = optlen + sizeof(struct group_filter) - | |
620 | sizeof(struct compat_group_filter); | |
621 | if (koptlen < GROUP_FILTER_SIZE(numsrc)) | |
622 | return -EINVAL; | |
623 | kgf = compat_alloc_user_space(koptlen); | |
624 | if (!access_ok(VERIFY_WRITE, kgf, koptlen) || | |
625 | __put_user(interface, &kgf->gf_interface) || | |
626 | __put_user(fmode, &kgf->gf_fmode) || | |
627 | __put_user(numsrc, &kgf->gf_numsrc) || | |
628 | copy_in_user(&kgf->gf_group, &gf32->gf_group, | |
629 | sizeof(kgf->gf_group)) || | |
be666e0a | 630 | (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist, |
dae50295 DS |
631 | numsrc * sizeof(kgf->gf_slist[0])))) |
632 | return -EFAULT; | |
633 | koptval = (char __user *)kgf; | |
634 | break; | |
635 | } | |
636 | ||
637 | default: | |
638 | break; | |
639 | } | |
640 | return setsockopt(sock, level, optname, koptval, koptlen); | |
641 | } | |
642 | ||
643 | EXPORT_SYMBOL(compat_mc_setsockopt); | |
644 | ||
42908c69 DS |
645 | int compat_mc_getsockopt(struct sock *sock, int level, int optname, |
646 | char __user *optval, int __user *optlen, | |
647 | int (*getsockopt)(struct sock *,int,int,char __user *,int __user *)) | |
648 | { | |
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) || | |
683 | copy_in_user(&kgf->gf_group,&gf32->gf_group,sizeof(kgf->gf_group))) | |
684 | 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; | |
716 | if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen)) | |
717 | return -EFAULT; | |
718 | } | |
719 | return err; | |
720 | } | |
721 | ||
722 | EXPORT_SYMBOL(compat_mc_getsockopt); | |
723 | ||
dae50295 | 724 | |
1da177e4 LT |
725 | /* Argument list sizes for compat_sys_socketcall */ |
726 | #define AL(x) ((x) * sizeof(u32)) | |
a2e27255 | 727 | static unsigned char nas[20]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3), |
1da177e4 | 728 | AL(3),AL(3),AL(4),AL(4),AL(4),AL(6), |
aaca0bdc | 729 | AL(6),AL(2),AL(5),AL(5),AL(3),AL(3), |
a2e27255 | 730 | AL(4),AL(5)}; |
1da177e4 LT |
731 | #undef AL |
732 | ||
733 | asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags) | |
734 | { | |
735 | return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); | |
736 | } | |
737 | ||
738 | asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags) | |
739 | { | |
740 | return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); | |
741 | } | |
742 | ||
1dacc76d JB |
743 | asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned flags) |
744 | { | |
745 | return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT); | |
746 | } | |
747 | ||
748 | asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len, | |
749 | unsigned flags, struct sockaddr __user *addr, | |
750 | int __user *addrlen) | |
751 | { | |
752 | return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen); | |
753 | } | |
754 | ||
a2e27255 ACM |
755 | asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg, |
756 | unsigned vlen, unsigned int flags, | |
60c2ffd3 | 757 | struct compat_timespec __user *timeout) |
a2e27255 ACM |
758 | { |
759 | int datagrams; | |
760 | struct timespec ktspec; | |
a2e27255 | 761 | |
5b23136b JMG |
762 | if (timeout == NULL) |
763 | return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, | |
764 | flags | MSG_CMSG_COMPAT, NULL); | |
765 | ||
de039f02 | 766 | if (get_compat_timespec(&ktspec, timeout)) |
a2e27255 ACM |
767 | return -EFAULT; |
768 | ||
769 | datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, | |
770 | flags | MSG_CMSG_COMPAT, &ktspec); | |
de039f02 | 771 | if (datagrams > 0 && put_compat_timespec(&ktspec, timeout)) |
a2e27255 ACM |
772 | datagrams = -EFAULT; |
773 | ||
774 | return datagrams; | |
775 | } | |
776 | ||
1da177e4 LT |
777 | asmlinkage long compat_sys_socketcall(int call, u32 __user *args) |
778 | { | |
779 | int ret; | |
780 | u32 a[6]; | |
781 | u32 a0, a1; | |
4768fbcb | 782 | |
a2e27255 | 783 | if (call < SYS_SOCKET || call > SYS_RECVMMSG) |
1da177e4 LT |
784 | return -EINVAL; |
785 | if (copy_from_user(a, args, nas[call])) | |
786 | return -EFAULT; | |
787 | a0 = a[0]; | |
788 | a1 = a[1]; | |
4768fbcb | 789 | |
e71a4783 | 790 | switch (call) { |
1da177e4 LT |
791 | case SYS_SOCKET: |
792 | ret = sys_socket(a0, a1, a[2]); | |
793 | break; | |
794 | case SYS_BIND: | |
795 | ret = sys_bind(a0, compat_ptr(a1), a[2]); | |
796 | break; | |
797 | case SYS_CONNECT: | |
798 | ret = sys_connect(a0, compat_ptr(a1), a[2]); | |
799 | break; | |
800 | case SYS_LISTEN: | |
801 | ret = sys_listen(a0, a1); | |
802 | break; | |
803 | case SYS_ACCEPT: | |
de11defe | 804 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0); |
1da177e4 LT |
805 | break; |
806 | case SYS_GETSOCKNAME: | |
807 | ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); | |
808 | break; | |
809 | case SYS_GETPEERNAME: | |
810 | ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); | |
811 | break; | |
812 | case SYS_SOCKETPAIR: | |
813 | ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); | |
814 | break; | |
815 | case SYS_SEND: | |
816 | ret = sys_send(a0, compat_ptr(a1), a[2], a[3]); | |
817 | break; | |
818 | case SYS_SENDTO: | |
819 | ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); | |
820 | break; | |
821 | case SYS_RECV: | |
1dacc76d | 822 | ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]); |
1da177e4 LT |
823 | break; |
824 | case SYS_RECVFROM: | |
1dacc76d JB |
825 | ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], |
826 | compat_ptr(a[4]), compat_ptr(a[5])); | |
1da177e4 LT |
827 | break; |
828 | case SYS_SHUTDOWN: | |
829 | ret = sys_shutdown(a0,a1); | |
830 | break; | |
831 | case SYS_SETSOCKOPT: | |
832 | ret = compat_sys_setsockopt(a0, a1, a[2], | |
833 | compat_ptr(a[3]), a[4]); | |
834 | break; | |
835 | case SYS_GETSOCKOPT: | |
836 | ret = compat_sys_getsockopt(a0, a1, a[2], | |
837 | compat_ptr(a[3]), compat_ptr(a[4])); | |
838 | break; | |
839 | case SYS_SENDMSG: | |
840 | ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); | |
841 | break; | |
842 | case SYS_RECVMSG: | |
843 | ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); | |
844 | break; | |
a2e27255 ACM |
845 | case SYS_RECVMMSG: |
846 | ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3], | |
847 | compat_ptr(a[4])); | |
848 | break; | |
de11defe UD |
849 | case SYS_ACCEPT4: |
850 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); | |
aaca0bdc | 851 | break; |
1da177e4 LT |
852 | default: |
853 | ret = -EINVAL; | |
854 | break; | |
855 | } | |
856 | return ret; | |
857 | } |