blob: 8fd37cd7b501364800f6219034f9774b41b20bd5 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
11 * Copyright (C) 2000,2001 Andi Kleen, SuSE Labs
12 */
13
14#include <linux/kernel.h>
15#include <linux/fs.h>
16#include <linux/sched.h>
17#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>
24#include <linux/netfilter_ipv4/ip_tables.h>
25#include <linux/security.h>
26
27#include <net/scm.h>
28#include <net/sock.h>
29#include <asm/uaccess.h>
30#include <net/compat.h>
31
32static 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
38 while(niov > 0) {
39 compat_uptr_t buf;
40 compat_size_t len;
41
42 if(get_user(len, &uiov32->iov_len) ||
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
57int 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. */
77int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,
78 char *kern_address, int mode)
79{
80 int tot_len;
81
82 if(kern_msg->msg_namelen) {
83 if(mode==VERIFY_READ) {
84 int err = move_addr_to_kernel(kern_msg->msg_name,
85 kern_msg->msg_namelen,
86 kern_address);
87 if(err < 0)
88 return err;
89 }
90 kern_msg->msg_name = kern_address;
91 } else
92 kern_msg->msg_name = NULL;
93
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 tot_len = iov_from_user_compat_to_kern(kern_iov,
95 (struct compat_iovec __user *)kern_msg->msg_iov,
96 kern_msg->msg_iovlen);
97 if(tot_len >= 0)
98 kern_msg->msg_iov = kern_iov;
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
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
124static 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 */
Al Viro8920e8f2005-09-07 18:28:51 -0700138int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 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;
Al Viro8920e8f2005-09-07 18:28:51 -0700145 int err = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146
147 kcmlen = 0;
148 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
149 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
150 while(ucmsg != NULL) {
151 if(get_user(ucmlen, &ucmsg->cmsg_len))
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)));
Al Viro8920e8f2005-09-07 18:28:51 -0700160 tmp = CMSG_ALIGN(tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 kcmlen += tmp;
162 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
163 }
164 if(kcmlen == 0)
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 */
Al Viro8920e8f2005-09-07 18:28:51 -0700172 if (kcmlen > stackbuf_size)
173 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
174 if (kcmsg == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 return -ENOBUFS;
176
177 /* Now copy them over neatly. */
178 memset(kcmsg, 0, kcmlen);
179 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
180 while(ucmsg != NULL) {
Al Viro8920e8f2005-09-07 18:28:51 -0700181 if (__get_user(ucmlen, &ucmsg->cmsg_len))
182 goto Efault;
183 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
184 goto Einval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
186 CMSG_ALIGN(sizeof(struct cmsghdr)));
Al Viro8920e8f2005-09-07 18:28:51 -0700187 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
188 goto Einval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 kcmsg->cmsg_len = tmp;
Al Viro8920e8f2005-09-07 18:28:51 -0700190 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
198 /* Advance. */
Al Viro8920e8f2005-09-07 18:28:51 -0700199 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 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
Al Viro8920e8f2005-09-07 18:28:51 -0700208Einval:
209 err = -EINVAL;
210Efault:
211 if (kcmsg_base != (struct cmsghdr *)stackbuf)
212 sock_kfree_s(sk, kcmsg_base, kcmlen);
213 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214}
215
216int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
217{
218 struct compat_timeval ctv;
219 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
220 struct compat_cmsghdr cmhdr;
221 int cmlen;
222
223 if(cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
224 kmsg->msg_flags |= MSG_CTRUNC;
225 return 0; /* XXX: return error? check spec. */
226 }
227
228 if (level == SOL_SOCKET && type == SO_TIMESTAMP) {
229 struct timeval *tv = (struct timeval *)data;
230 ctv.tv_sec = tv->tv_sec;
231 ctv.tv_usec = tv->tv_usec;
232 data = &ctv;
233 len = sizeof(struct compat_timeval);
234 }
235
236 cmlen = CMSG_COMPAT_LEN(len);
237 if(kmsg->msg_controllen < cmlen) {
238 kmsg->msg_flags |= MSG_CTRUNC;
239 cmlen = kmsg->msg_controllen;
240 }
241 cmhdr.cmsg_level = level;
242 cmhdr.cmsg_type = type;
243 cmhdr.cmsg_len = cmlen;
244
245 if(copy_to_user(cm, &cmhdr, sizeof cmhdr))
246 return -EFAULT;
247 if(copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
248 return -EFAULT;
249 cmlen = CMSG_COMPAT_SPACE(len);
250 kmsg->msg_control += cmlen;
251 kmsg->msg_controllen -= cmlen;
252 return 0;
253}
254
255void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
256{
257 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
258 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
259 int fdnum = scm->fp->count;
260 struct file **fp = scm->fp->fp;
261 int __user *cmfptr;
262 int err = 0, i;
263
264 if (fdnum < fdmax)
265 fdmax = fdnum;
266
267 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
268 int new_fd;
269 err = security_file_receive(fp[i]);
270 if (err)
271 break;
272 err = get_unused_fd();
273 if (err < 0)
274 break;
275 new_fd = err;
276 err = put_user(new_fd, cmfptr);
277 if (err) {
278 put_unused_fd(new_fd);
279 break;
280 }
281 /* Bump the usage count and install the file. */
282 get_file(fp[i]);
283 fd_install(new_fd, fp[i]);
284 }
285
286 if (i > 0) {
287 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
288 if (!err)
289 err = put_user(SOL_SOCKET, &cm->cmsg_level);
290 if (!err)
291 err = put_user(SCM_RIGHTS, &cm->cmsg_type);
292 if (!err)
293 err = put_user(cmlen, &cm->cmsg_len);
294 if (!err) {
295 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
296 kmsg->msg_control += cmlen;
297 kmsg->msg_controllen -= cmlen;
298 }
299 }
300 if (i < fdnum)
301 kmsg->msg_flags |= MSG_CTRUNC;
302
303 /*
304 * All of the files that fit in the message have had their
305 * usage counts incremented, so we just free the list.
306 */
307 __scm_destroy(scm);
308}
309
310/*
311 * For now, we assume that the compatibility and native version
312 * of struct ipt_entry are the same - sfr. FIXME
313 */
314struct compat_ipt_replace {
315 char name[IPT_TABLE_MAXNAMELEN];
316 u32 valid_hooks;
317 u32 num_entries;
318 u32 size;
319 u32 hook_entry[NF_IP_NUMHOOKS];
320 u32 underflow[NF_IP_NUMHOOKS];
321 u32 num_counters;
322 compat_uptr_t counters; /* struct ipt_counters * */
323 struct ipt_entry entries[0];
324};
325
326static int do_netfilter_replace(int fd, int level, int optname,
327 char __user *optval, int optlen)
328{
329 struct compat_ipt_replace __user *urepl;
330 struct ipt_replace __user *repl_nat;
331 char name[IPT_TABLE_MAXNAMELEN];
332 u32 origsize, tmp32, num_counters;
333 unsigned int repl_nat_size;
334 int ret;
335 int i;
336 compat_uptr_t ucntrs;
337
338 urepl = (struct compat_ipt_replace __user *)optval;
339 if (get_user(origsize, &urepl->size))
340 return -EFAULT;
341
342 /* Hack: Causes ipchains to give correct error msg --RR */
343 if (optlen != sizeof(*urepl) + origsize)
344 return -ENOPROTOOPT;
345
346 /* XXX Assumes that size of ipt_entry is the same both in
347 * native and compat environments.
348 */
349 repl_nat_size = sizeof(*repl_nat) + origsize;
350 repl_nat = compat_alloc_user_space(repl_nat_size);
351
352 ret = -EFAULT;
353 if (put_user(origsize, &repl_nat->size))
354 goto out;
355
356 if (!access_ok(VERIFY_READ, urepl, optlen) ||
357 !access_ok(VERIFY_WRITE, repl_nat, optlen))
358 goto out;
359
360 if (__copy_from_user(name, urepl->name, sizeof(urepl->name)) ||
361 __copy_to_user(repl_nat->name, name, sizeof(repl_nat->name)))
362 goto out;
363
364 if (__get_user(tmp32, &urepl->valid_hooks) ||
365 __put_user(tmp32, &repl_nat->valid_hooks))
366 goto out;
367
368 if (__get_user(tmp32, &urepl->num_entries) ||
369 __put_user(tmp32, &repl_nat->num_entries))
370 goto out;
371
372 if (__get_user(num_counters, &urepl->num_counters) ||
373 __put_user(num_counters, &repl_nat->num_counters))
374 goto out;
375
376 if (__get_user(ucntrs, &urepl->counters) ||
377 __put_user(compat_ptr(ucntrs), &repl_nat->counters))
378 goto out;
379
380 if (__copy_in_user(&repl_nat->entries[0],
381 &urepl->entries[0],
382 origsize))
383 goto out;
384
385 for (i = 0; i < NF_IP_NUMHOOKS; i++) {
386 if (__get_user(tmp32, &urepl->hook_entry[i]) ||
387 __put_user(tmp32, &repl_nat->hook_entry[i]) ||
388 __get_user(tmp32, &urepl->underflow[i]) ||
389 __put_user(tmp32, &repl_nat->underflow[i]))
390 goto out;
391 }
392
393 /*
394 * Since struct ipt_counters just contains two u_int64_t members
395 * we can just do the access_ok check here and pass the (converted)
396 * pointer into the standard syscall. We hope that the pointer is
397 * not misaligned ...
398 */
399 if (!access_ok(VERIFY_WRITE, compat_ptr(ucntrs),
400 num_counters * sizeof(struct ipt_counters)))
401 goto out;
402
403
404 ret = sys_setsockopt(fd, level, optname,
405 (char __user *)repl_nat, repl_nat_size);
406
407out:
408 return ret;
409}
410
411/*
412 * A struct sock_filter is architecture independent.
413 */
414struct compat_sock_fprog {
415 u16 len;
416 compat_uptr_t filter; /* struct sock_filter * */
417};
418
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800419static int do_set_attach_filter(struct socket *sock, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 char __user *optval, int optlen)
421{
422 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
423 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
424 compat_uptr_t ptr;
425 u16 len;
426
427 if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) ||
428 !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) ||
429 __get_user(len, &fprog32->len) ||
430 __get_user(ptr, &fprog32->filter) ||
431 __put_user(len, &kfprog->len) ||
432 __put_user(compat_ptr(ptr), &kfprog->filter))
433 return -EFAULT;
434
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800435 return sock_setsockopt(sock, level, optname, (char __user *)kfprog,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 sizeof(struct sock_fprog));
437}
438
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800439static int do_set_sock_timeout(struct socket *sock, int level,
440 int optname, char __user *optval, int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441{
442 struct compat_timeval __user *up = (struct compat_timeval __user *) optval;
443 struct timeval ktime;
444 mm_segment_t old_fs;
445 int err;
446
447 if (optlen < sizeof(*up))
448 return -EINVAL;
449 if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
450 __get_user(ktime.tv_sec, &up->tv_sec) ||
451 __get_user(ktime.tv_usec, &up->tv_usec))
452 return -EFAULT;
453 old_fs = get_fs();
454 set_fs(KERNEL_DS);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800455 err = sock_setsockopt(sock, level, optname, (char *) &ktime, sizeof(ktime));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 set_fs(old_fs);
457
458 return err;
459}
460
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800461static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
462 char __user *optval, int optlen)
463{
464 if (optname == SO_ATTACH_FILTER)
465 return do_set_attach_filter(sock, level, optname,
466 optval, optlen);
467 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
468 return do_set_sock_timeout(sock, level, optname, optval, optlen);
469
470 return sock_setsockopt(sock, level, optname, optval, optlen);
471}
472
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
474 char __user *optval, int optlen)
475{
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800476 int err;
477 struct socket *sock;
478
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 /* SO_SET_REPLACE seems to be the same in all levels */
480 if (optname == IPT_SO_SET_REPLACE)
481 return do_netfilter_replace(fd, level, optname,
482 optval, optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800484 if (optlen < 0)
485 return -EINVAL;
486
487 if ((sock = sockfd_lookup(fd, &err))!=NULL)
488 {
489 err = security_socket_setsockopt(sock,level,optname);
490 if (err) {
491 sockfd_put(sock);
492 return err;
493 }
494
495 if (level == SOL_SOCKET)
496 err = compat_sock_setsockopt(sock, level,
497 optname, optval, optlen);
498 else if (sock->ops->compat_setsockopt)
499 err = sock->ops->compat_setsockopt(sock, level,
500 optname, optval, optlen);
501 else
502 err = sock->ops->setsockopt(sock, level,
503 optname, optval, optlen);
504 sockfd_put(sock);
505 }
506 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507}
508
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800509static int do_get_sock_timeout(struct socket *sock, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 char __user *optval, int __user *optlen)
511{
512 struct compat_timeval __user *up;
513 struct timeval ktime;
514 mm_segment_t old_fs;
515 int len, err;
516
517 up = (struct compat_timeval __user *) optval;
518 if (get_user(len, optlen))
519 return -EFAULT;
520 if (len < sizeof(*up))
521 return -EINVAL;
522 len = sizeof(ktime);
523 old_fs = get_fs();
524 set_fs(KERNEL_DS);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800525 err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 set_fs(old_fs);
527
528 if (!err) {
529 if (put_user(sizeof(*up), optlen) ||
530 !access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
531 __put_user(ktime.tv_sec, &up->tv_sec) ||
532 __put_user(ktime.tv_usec, &up->tv_usec))
533 err = -EFAULT;
534 }
535 return err;
536}
537
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800538static int compat_sock_getsockopt(struct socket *sock, int level, int optname,
539 char __user *optval, int __user *optlen)
540{
541 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
542 return do_get_sock_timeout(sock, level, optname, optval, optlen);
543 return sock_getsockopt(sock, level, optname, optval, optlen);
544}
545
Shaun Pereiraf0ac2612006-03-21 23:59:39 -0800546int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
547{
548 struct compat_timeval __user *ctv =
549 (struct compat_timeval __user*) userstamp;
550 int err = -ENOENT;
551
552 if (!sock_flag(sk, SOCK_TIMESTAMP))
553 sock_enable_timestamp(sk);
554 if (sk->sk_stamp.tv_sec == -1)
555 return err;
556 if (sk->sk_stamp.tv_sec == 0)
557 do_gettimeofday(&sk->sk_stamp);
558 if (put_user(sk->sk_stamp.tv_sec, &ctv->tv_sec) ||
559 put_user(sk->sk_stamp.tv_usec, &ctv->tv_usec))
560 err = -EFAULT;
561 return err;
562}
563EXPORT_SYMBOL(compat_sock_get_timestamp);
564
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
566 char __user *optval, int __user *optlen)
567{
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800568 int err;
569 struct socket *sock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800571 if ((sock = sockfd_lookup(fd, &err))!=NULL)
572 {
573 err = security_socket_getsockopt(sock, level,
574 optname);
575 if (err) {
576 sockfd_put(sock);
577 return err;
578 }
579
580 if (level == SOL_SOCKET)
581 err = compat_sock_getsockopt(sock, level,
582 optname, optval, optlen);
583 else if (sock->ops->compat_getsockopt)
584 err = sock->ops->compat_getsockopt(sock, level,
585 optname, optval, optlen);
586 else
587 err = sock->ops->getsockopt(sock, level,
588 optname, optval, optlen);
589 sockfd_put(sock);
590 }
591 return err;
592}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593/* Argument list sizes for compat_sys_socketcall */
594#define AL(x) ((x) * sizeof(u32))
595static unsigned char nas[18]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
596 AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
597 AL(6),AL(2),AL(5),AL(5),AL(3),AL(3)};
598#undef AL
599
600asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags)
601{
602 return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
603}
604
605asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
606{
607 return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
608}
609
610asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
611{
612 int ret;
613 u32 a[6];
614 u32 a0, a1;
615
616 if (call < SYS_SOCKET || call > SYS_RECVMSG)
617 return -EINVAL;
618 if (copy_from_user(a, args, nas[call]))
619 return -EFAULT;
620 a0 = a[0];
621 a1 = a[1];
622
623 switch(call) {
624 case SYS_SOCKET:
625 ret = sys_socket(a0, a1, a[2]);
626 break;
627 case SYS_BIND:
628 ret = sys_bind(a0, compat_ptr(a1), a[2]);
629 break;
630 case SYS_CONNECT:
631 ret = sys_connect(a0, compat_ptr(a1), a[2]);
632 break;
633 case SYS_LISTEN:
634 ret = sys_listen(a0, a1);
635 break;
636 case SYS_ACCEPT:
637 ret = sys_accept(a0, compat_ptr(a1), compat_ptr(a[2]));
638 break;
639 case SYS_GETSOCKNAME:
640 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
641 break;
642 case SYS_GETPEERNAME:
643 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
644 break;
645 case SYS_SOCKETPAIR:
646 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
647 break;
648 case SYS_SEND:
649 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
650 break;
651 case SYS_SENDTO:
652 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
653 break;
654 case SYS_RECV:
655 ret = sys_recv(a0, compat_ptr(a1), a[2], a[3]);
656 break;
657 case SYS_RECVFROM:
658 ret = sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), compat_ptr(a[5]));
659 break;
660 case SYS_SHUTDOWN:
661 ret = sys_shutdown(a0,a1);
662 break;
663 case SYS_SETSOCKOPT:
664 ret = compat_sys_setsockopt(a0, a1, a[2],
665 compat_ptr(a[3]), a[4]);
666 break;
667 case SYS_GETSOCKOPT:
668 ret = compat_sys_getsockopt(a0, a1, a[2],
669 compat_ptr(a[3]), compat_ptr(a[4]));
670 break;
671 case SYS_SENDMSG:
672 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
673 break;
674 case SYS_RECVMSG:
675 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
676 break;
677 default:
678 ret = -EINVAL;
679 break;
680 }
681 return ret;
682}