xref: /openbmc/linux/net/compat.c (revision d5cb9783536a41df9f9cba5b0a1d78047ed787f7)
1 /*
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 
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 
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 
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,
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 
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);
97 	if(tot_len >= 0)
98 		kern_msg->msg_iov = kern_iov;
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  */
138 int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
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;
145 	int err = -EFAULT;
146 
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)));
160 		tmp = CMSG_ALIGN(tmp);
161 		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 	 */
172 	if (kcmlen > stackbuf_size)
173 		kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
174 	if (kcmsg == NULL)
175 		return -ENOBUFS;
176 
177 	/* Now copy them over neatly. */
178 	memset(kcmsg, 0, kcmlen);
179 	ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
180 	while(ucmsg != NULL) {
181 		if (__get_user(ucmlen, &ucmsg->cmsg_len))
182 			goto Efault;
183 		if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
184 			goto Einval;
185 		tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
186 		       CMSG_ALIGN(sizeof(struct cmsghdr)));
187 		if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
188 			goto Einval;
189 		kcmsg->cmsg_len = tmp;
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;
197 
198 		/* Advance. */
199 		kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
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 
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;
214 }
215 
216 int 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 
255 void 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  */
314 struct 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 
326 static 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 
407 out:
408 	return ret;
409 }
410 
411 /*
412  * A struct sock_filter is architecture independent.
413  */
414 struct compat_sock_fprog {
415 	u16		len;
416 	compat_uptr_t	filter;		/* struct sock_filter * */
417 };
418 
419 static int do_set_attach_filter(int fd, int level, int optname,
420 				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 
435 	return sys_setsockopt(fd, level, optname, (char __user *)kfprog,
436 			      sizeof(struct sock_fprog));
437 }
438 
439 static int do_set_sock_timeout(int fd, int level, int optname, char __user *optval, int optlen)
440 {
441 	struct compat_timeval __user *up = (struct compat_timeval __user *) optval;
442 	struct timeval ktime;
443 	mm_segment_t old_fs;
444 	int err;
445 
446 	if (optlen < sizeof(*up))
447 		return -EINVAL;
448 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
449 	    __get_user(ktime.tv_sec, &up->tv_sec) ||
450 	    __get_user(ktime.tv_usec, &up->tv_usec))
451 		return -EFAULT;
452 	old_fs = get_fs();
453 	set_fs(KERNEL_DS);
454 	err = sys_setsockopt(fd, level, optname, (char *) &ktime, sizeof(ktime));
455 	set_fs(old_fs);
456 
457 	return err;
458 }
459 
460 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
461 				char __user *optval, int optlen)
462 {
463 	/* SO_SET_REPLACE seems to be the same in all levels */
464 	if (optname == IPT_SO_SET_REPLACE)
465 		return do_netfilter_replace(fd, level, optname,
466 					    optval, optlen);
467 	if (level == SOL_SOCKET && optname == SO_ATTACH_FILTER)
468 		return do_set_attach_filter(fd, level, optname,
469 					    optval, optlen);
470 	if (level == SOL_SOCKET &&
471 	    (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO))
472 		return do_set_sock_timeout(fd, level, optname, optval, optlen);
473 
474 	return sys_setsockopt(fd, level, optname, optval, optlen);
475 }
476 
477 static int do_get_sock_timeout(int fd, int level, int optname,
478 		char __user *optval, int __user *optlen)
479 {
480 	struct compat_timeval __user *up;
481 	struct timeval ktime;
482 	mm_segment_t old_fs;
483 	int len, err;
484 
485 	up = (struct compat_timeval __user *) optval;
486 	if (get_user(len, optlen))
487 		return -EFAULT;
488 	if (len < sizeof(*up))
489 		return -EINVAL;
490 	len = sizeof(ktime);
491 	old_fs = get_fs();
492 	set_fs(KERNEL_DS);
493 	err = sys_getsockopt(fd, level, optname, (char *) &ktime, &len);
494 	set_fs(old_fs);
495 
496 	if (!err) {
497 		if (put_user(sizeof(*up), optlen) ||
498 		    !access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
499 		    __put_user(ktime.tv_sec, &up->tv_sec) ||
500 		    __put_user(ktime.tv_usec, &up->tv_usec))
501 			err = -EFAULT;
502 	}
503 	return err;
504 }
505 
506 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
507 				char __user *optval, int __user *optlen)
508 {
509 	if (level == SOL_SOCKET &&
510 	    (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO))
511 		return do_get_sock_timeout(fd, level, optname, optval, optlen);
512 	return sys_getsockopt(fd, level, optname, optval, optlen);
513 }
514 
515 /* Argument list sizes for compat_sys_socketcall */
516 #define AL(x) ((x) * sizeof(u32))
517 static unsigned char nas[18]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
518 				AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
519 				AL(6),AL(2),AL(5),AL(5),AL(3),AL(3)};
520 #undef AL
521 
522 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags)
523 {
524 	return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
525 }
526 
527 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
528 {
529 	return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
530 }
531 
532 asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
533 {
534 	int ret;
535 	u32 a[6];
536 	u32 a0, a1;
537 
538 	if (call < SYS_SOCKET || call > SYS_RECVMSG)
539 		return -EINVAL;
540 	if (copy_from_user(a, args, nas[call]))
541 		return -EFAULT;
542 	a0 = a[0];
543 	a1 = a[1];
544 
545 	switch(call) {
546 	case SYS_SOCKET:
547 		ret = sys_socket(a0, a1, a[2]);
548 		break;
549 	case SYS_BIND:
550 		ret = sys_bind(a0, compat_ptr(a1), a[2]);
551 		break;
552 	case SYS_CONNECT:
553 		ret = sys_connect(a0, compat_ptr(a1), a[2]);
554 		break;
555 	case SYS_LISTEN:
556 		ret = sys_listen(a0, a1);
557 		break;
558 	case SYS_ACCEPT:
559 		ret = sys_accept(a0, compat_ptr(a1), compat_ptr(a[2]));
560 		break;
561 	case SYS_GETSOCKNAME:
562 		ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
563 		break;
564 	case SYS_GETPEERNAME:
565 		ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
566 		break;
567 	case SYS_SOCKETPAIR:
568 		ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
569 		break;
570 	case SYS_SEND:
571 		ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
572 		break;
573 	case SYS_SENDTO:
574 		ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
575 		break;
576 	case SYS_RECV:
577 		ret = sys_recv(a0, compat_ptr(a1), a[2], a[3]);
578 		break;
579 	case SYS_RECVFROM:
580 		ret = sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), compat_ptr(a[5]));
581 		break;
582 	case SYS_SHUTDOWN:
583 		ret = sys_shutdown(a0,a1);
584 		break;
585 	case SYS_SETSOCKOPT:
586 		ret = compat_sys_setsockopt(a0, a1, a[2],
587 				compat_ptr(a[3]), a[4]);
588 		break;
589 	case SYS_GETSOCKOPT:
590 		ret = compat_sys_getsockopt(a0, a1, a[2],
591 				compat_ptr(a[3]), compat_ptr(a[4]));
592 		break;
593 	case SYS_SENDMSG:
594 		ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
595 		break;
596 	case SYS_RECVMSG:
597 		ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
598 		break;
599 	default:
600 		ret = -EINVAL;
601 		break;
602 	}
603 	return ret;
604 }
605