[linux.git] / net / compat.c

/*
 * 32bit Socket syscall emulation. Based on arch/sparc64/kernel/sys_sparc32.c.
 *
 * Copyright (C) 2000		VA Linux Co
 * Copyright (C) 2000		Don Dugger <[email protected]>
 * Copyright (C) 1999 		Arun Sharma <[email protected]>
 * Copyright (C) 1997,1998 	Jakub Jelinek ([email protected])
 * Copyright (C) 1997 		David S. Miller ([email protected])
 * Copyright (C) 2000		Hewlett-Packard Co.
 * Copyright (C) 2000		David Mosberger-Tang <[email protected]>
 * Copyright (C) 2000,2001	Andi Kleen, SuSE Labs
 */

#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/types.h>
#include <linux/file.h>
#include <linux/icmpv6.h>
#include <linux/socket.h>
#include <linux/syscalls.h>
#include <linux/filter.h>
#include <linux/compat.h>
#include <linux/security.h>

#include <net/scm.h>
#include <net/sock.h>
#include <asm/uaccess.h>
#include <net/compat.h>

static inline int iov_from_user_compat_to_kern(struct iovec *kiov,
					  struct compat_iovec __user *uiov32,
					  int niov)
{
	int tot_len = 0;

	while (niov > 0) {
		compat_uptr_t buf;
		compat_size_t len;

		if (get_user(len, &uiov32->iov_len) ||
		   get_user(buf, &uiov32->iov_base)) {
			tot_len = -EFAULT;
			break;
		}
		tot_len += len;
		kiov->iov_base = compat_ptr(buf);
		kiov->iov_len = (__kernel_size_t) len;
		uiov32++;
		kiov++;
		niov--;
	}
	return tot_len;
}

int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg)
{
	compat_uptr_t tmp1, tmp2, tmp3;

	if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) ||
	    __get_user(tmp1, &umsg->msg_name) ||
	    __get_user(kmsg->msg_namelen, &umsg->msg_namelen) ||
	    __get_user(tmp2, &umsg->msg_iov) ||
	    __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) ||
	    __get_user(tmp3, &umsg->msg_control) ||
	    __get_user(kmsg->msg_controllen, &umsg->msg_controllen) ||
	    __get_user(kmsg->msg_flags, &umsg->msg_flags))
		return -EFAULT;
	kmsg->msg_name = compat_ptr(tmp1);
	kmsg->msg_iov = compat_ptr(tmp2);
	kmsg->msg_control = compat_ptr(tmp3);
	return 0;
}

/* I've named the args so it is easy to tell whose space the pointers are in. */
int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,
		   char *kern_address, int mode)
{
	int tot_len;

	if (kern_msg->msg_namelen) {
		if (mode==VERIFY_READ) {
			int err = move_addr_to_kernel(kern_msg->msg_name,
						      kern_msg->msg_namelen,
						      kern_address);
			if (err < 0)
				return err;
		}
		kern_msg->msg_name = kern_address;
	} else
		kern_msg->msg_name = NULL;

	tot_len = iov_from_user_compat_to_kern(kern_iov,
					  (struct compat_iovec __user *)kern_msg->msg_iov,
					  kern_msg->msg_iovlen);
	if (tot_len >= 0)
		kern_msg->msg_iov = kern_iov;

	return tot_len;
}

/* Bleech... */
#define CMSG_COMPAT_ALIGN(len)	ALIGN((len), sizeof(s32))

#define CMSG_COMPAT_DATA(cmsg)				\
	((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))))
#define CMSG_COMPAT_SPACE(len)				\
	(CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len))
#define CMSG_COMPAT_LEN(len)				\
	(CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len))

#define CMSG_COMPAT_FIRSTHDR(msg)			\
	(((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ?	\
	 (struct compat_cmsghdr __user *)((msg)->msg_control) :		\
	 (struct compat_cmsghdr __user *)NULL)

#define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
	((ucmlen) >= sizeof(struct compat_cmsghdr) && \
	 (ucmlen) <= (unsigned long) \
	 ((mhdr)->msg_controllen - \
	  ((char *)(ucmsg) - (char *)(mhdr)->msg_control)))

static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
		struct compat_cmsghdr __user *cmsg, int cmsg_len)
{
	char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
	if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
			msg->msg_controllen)
		return NULL;
	return (struct compat_cmsghdr __user *)ptr;
}

/* There is a lot of hair here because the alignment rules (and
 * thus placement) of cmsg headers and length are different for
 * 32-bit apps.  -DaveM
 */
int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
			       unsigned char *stackbuf, int stackbuf_size)
{
	struct compat_cmsghdr __user *ucmsg;
	struct cmsghdr *kcmsg, *kcmsg_base;
	compat_size_t ucmlen;
	__kernel_size_t kcmlen, tmp;
	int err = -EFAULT;

	kcmlen = 0;
	kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
	ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
	while (ucmsg != NULL) {
		if (get_user(ucmlen, &ucmsg->cmsg_len))
			return -EFAULT;

		/* Catch bogons. */
		if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
			return -EINVAL;

		tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
		       CMSG_ALIGN(sizeof(struct cmsghdr)));
		tmp = CMSG_ALIGN(tmp);
		kcmlen += tmp;
		ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
	}
	if (kcmlen == 0)
		return -EINVAL;

	/* The kcmlen holds the 64-bit version of the control length.
	 * It may not be modified as we do not stick it into the kmsg
	 * until we have successfully copied over all of the data
	 * from the user.
	 */
	if (kcmlen > stackbuf_size)
		kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
	if (kcmsg == NULL)
		return -ENOBUFS;

	/* Now copy them over neatly. */
	memset(kcmsg, 0, kcmlen);
	ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
	while (ucmsg != NULL) {
		if (__get_user(ucmlen, &ucmsg->cmsg_len))
			goto Efault;
		if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
			goto Einval;
		tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
		       CMSG_ALIGN(sizeof(struct cmsghdr)));
		if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
			goto Einval;
		kcmsg->cmsg_len = tmp;
		tmp = CMSG_ALIGN(tmp);
		if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) ||
		    __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) ||
		    copy_from_user(CMSG_DATA(kcmsg),
				   CMSG_COMPAT_DATA(ucmsg),
				   (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg)))))
			goto Efault;

		/* Advance. */
		kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
		ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
	}

	/* Ok, looks like we made it.  Hook it up and return success. */
	kmsg->msg_control = kcmsg_base;
	kmsg->msg_controllen = kcmlen;
	return 0;

Einval:
	err = -EINVAL;
Efault:
	if (kcmsg_base != (struct cmsghdr *)stackbuf)
		sock_kfree_s(sk, kcmsg_base, kcmlen);
	return err;
}

int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
{
	struct compat_timeval ctv;
	struct compat_timespec cts;
	struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
	struct compat_cmsghdr cmhdr;
	int cmlen;

	if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
		kmsg->msg_flags |= MSG_CTRUNC;
		return 0; /* XXX: return error? check spec. */
	}

	if (level == SOL_SOCKET && type == SO_TIMESTAMP) {
		struct timeval *tv = (struct timeval *)data;
		ctv.tv_sec = tv->tv_sec;
		ctv.tv_usec = tv->tv_usec;
		data = &ctv;
		len = sizeof(ctv);
	}
	if (level == SOL_SOCKET && type == SO_TIMESTAMPNS) {
		struct timespec *ts = (struct timespec *)data;
		cts.tv_sec = ts->tv_sec;
		cts.tv_nsec = ts->tv_nsec;
		data = &cts;
		len = sizeof(cts);
	}

	cmlen = CMSG_COMPAT_LEN(len);
	if (kmsg->msg_controllen < cmlen) {
		kmsg->msg_flags |= MSG_CTRUNC;
		cmlen = kmsg->msg_controllen;
	}
	cmhdr.cmsg_level = level;
	cmhdr.cmsg_type = type;
	cmhdr.cmsg_len = cmlen;

	if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
		return -EFAULT;
	if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
		return -EFAULT;
	cmlen = CMSG_COMPAT_SPACE(len);
	if (kmsg->msg_controllen < cmlen)
		cmlen = kmsg->msg_controllen;
	kmsg->msg_control += cmlen;
	kmsg->msg_controllen -= cmlen;
	return 0;
}

void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
{
	struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
	int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
	int fdnum = scm->fp->count;
	struct file **fp = scm->fp->fp;
	int __user *cmfptr;
	int err = 0, i;

	if (fdnum < fdmax)
		fdmax = fdnum;

	for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
		int new_fd;
		err = security_file_receive(fp[i]);
		if (err)
			break;
		err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags
					  ? O_CLOEXEC : 0);
		if (err < 0)
			break;
		new_fd = err;
		err = put_user(new_fd, cmfptr);
		if (err) {
			put_unused_fd(new_fd);
			break;
		}
		/* Bump the usage count and install the file. */
		get_file(fp[i]);
		fd_install(new_fd, fp[i]);
	}

	if (i > 0) {
		int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
		err = put_user(SOL_SOCKET, &cm->cmsg_level);
		if (!err)
			err = put_user(SCM_RIGHTS, &cm->cmsg_type);
		if (!err)
			err = put_user(cmlen, &cm->cmsg_len);
		if (!err) {
			cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
			kmsg->msg_control += cmlen;
			kmsg->msg_controllen -= cmlen;
		}
	}
	if (i < fdnum)
		kmsg->msg_flags |= MSG_CTRUNC;

	/*
	 * All of the files that fit in the message have had their
	 * usage counts incremented, so we just free the list.
	 */
	__scm_destroy(scm);
}

/*
 * A struct sock_filter is architecture independent.
 */
struct compat_sock_fprog {
	u16		len;
	compat_uptr_t	filter;		/* struct sock_filter * */
};

static int do_set_attach_filter(struct socket *sock, int level, int optname,
				char __user *optval, int optlen)
{
	struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
	struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
	compat_uptr_t ptr;
	u16 len;

	if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) ||
	    !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) ||
	    __get_user(len, &fprog32->len) ||
	    __get_user(ptr, &fprog32->filter) ||
	    __put_user(len, &kfprog->len) ||
	    __put_user(compat_ptr(ptr), &kfprog->filter))
		return -EFAULT;

	return sock_setsockopt(sock, level, optname, (char __user *)kfprog,
			      sizeof(struct sock_fprog));
}

static int do_set_sock_timeout(struct socket *sock, int level,
		int optname, char __user *optval, int optlen)
{
	struct compat_timeval __user *up = (struct compat_timeval __user *) optval;
	struct timeval ktime;
	mm_segment_t old_fs;
	int err;

	if (optlen < sizeof(*up))
		return -EINVAL;
	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
	    __get_user(ktime.tv_sec, &up->tv_sec) ||
	    __get_user(ktime.tv_usec, &up->tv_usec))
		return -EFAULT;
	old_fs = get_fs();
	set_fs(KERNEL_DS);
	err = sock_setsockopt(sock, level, optname, (char *) &ktime, sizeof(ktime));
	set_fs(old_fs);

	return err;
}

static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
				char __user *optval, int optlen)
{
	if (optname == SO_ATTACH_FILTER)
		return do_set_attach_filter(sock, level, optname,
					    optval, optlen);
	if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
		return do_set_sock_timeout(sock, level, optname, optval, optlen);

	return sock_setsockopt(sock, level, optname, optval, optlen);
}

asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
				char __user *optval, int optlen)
{
	int err;
	struct socket *sock;

	if (optlen < 0)
		return -EINVAL;

	if ((sock = sockfd_lookup(fd, &err))!=NULL)
	{
		err = security_socket_setsockopt(sock,level,optname);
		if (err) {
			sockfd_put(sock);
			return err;
		}

		if (level == SOL_SOCKET)
			err = compat_sock_setsockopt(sock, level,
					optname, optval, optlen);
		else if (sock->ops->compat_setsockopt)
			err = sock->ops->compat_setsockopt(sock, level,
					optname, optval, optlen);
		else
			err = sock->ops->setsockopt(sock, level,
					optname, optval, optlen);
		sockfd_put(sock);
	}
	return err;
}

static int do_get_sock_timeout(struct socket *sock, int level, int optname,
		char __user *optval, int __user *optlen)
{
	struct compat_timeval __user *up;
	struct timeval ktime;
	mm_segment_t old_fs;
	int len, err;

	up = (struct compat_timeval __user *) optval;
	if (get_user(len, optlen))
		return -EFAULT;
	if (len < sizeof(*up))
		return -EINVAL;
	len = sizeof(ktime);
	old_fs = get_fs();
	set_fs(KERNEL_DS);
	err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len);
	set_fs(old_fs);

	if (!err) {
		if (put_user(sizeof(*up), optlen) ||
		    !access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
		    __put_user(ktime.tv_sec, &up->tv_sec) ||
		    __put_user(ktime.tv_usec, &up->tv_usec))
			err = -EFAULT;
	}
	return err;
}

static int compat_sock_getsockopt(struct socket *sock, int level, int optname,
				char __user *optval, int __user *optlen)
{
	if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
		return do_get_sock_timeout(sock, level, optname, optval, optlen);
	return sock_getsockopt(sock, level, optname, optval, optlen);
}

int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
{
	struct compat_timeval __user *ctv =
			(struct compat_timeval __user*) userstamp;
	int err = -ENOENT;
	struct timeval tv;

	if (!sock_flag(sk, SOCK_TIMESTAMP))
		sock_enable_timestamp(sk);
	tv = ktime_to_timeval(sk->sk_stamp);
	if (tv.tv_sec == -1)
		return err;
	if (tv.tv_sec == 0) {
		sk->sk_stamp = ktime_get_real();
		tv = ktime_to_timeval(sk->sk_stamp);
	}
	err = 0;
	if (put_user(tv.tv_sec, &ctv->tv_sec) ||
			put_user(tv.tv_usec, &ctv->tv_usec))
		err = -EFAULT;
	return err;
}
EXPORT_SYMBOL(compat_sock_get_timestamp);

int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp)
{
	struct compat_timespec __user *ctv =
			(struct compat_timespec __user*) userstamp;
	int err = -ENOENT;
	struct timespec ts;

	if (!sock_flag(sk, SOCK_TIMESTAMP))
		sock_enable_timestamp(sk);
	ts = ktime_to_timespec(sk->sk_stamp);
	if (ts.tv_sec == -1)
		return err;
	if (ts.tv_sec == 0) {
		sk->sk_stamp = ktime_get_real();
		ts = ktime_to_timespec(sk->sk_stamp);
	}
	err = 0;
	if (put_user(ts.tv_sec, &ctv->tv_sec) ||
			put_user(ts.tv_nsec, &ctv->tv_nsec))
		err = -EFAULT;
	return err;
}
EXPORT_SYMBOL(compat_sock_get_timestampns);

asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
				char __user *optval, int __user *optlen)
{
	int err;
	struct socket *sock;

	if ((sock = sockfd_lookup(fd, &err))!=NULL)
	{
		err = security_socket_getsockopt(sock, level,
							   optname);
		if (err) {
			sockfd_put(sock);
			return err;
		}

		if (level == SOL_SOCKET)
			err = compat_sock_getsockopt(sock, level,
					optname, optval, optlen);
		else if (sock->ops->compat_getsockopt)
			err = sock->ops->compat_getsockopt(sock, level,
					optname, optval, optlen);
		else
			err = sock->ops->getsockopt(sock, level,
					optname, optval, optlen);
		sockfd_put(sock);
	}
	return err;
}
/* Argument list sizes for compat_sys_socketcall */
#define AL(x) ((x) * sizeof(u32))
static unsigned char nas[18]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
				AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
				AL(6),AL(2),AL(5),AL(5),AL(3),AL(3)};
#undef AL

asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags)
{
	return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
}

asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
{
	return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
}

asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
{
	int ret;
	u32 a[6];
	u32 a0, a1;

	if (call < SYS_SOCKET || call > SYS_RECVMSG)
		return -EINVAL;
	if (copy_from_user(a, args, nas[call]))
		return -EFAULT;
	a0 = a[0];
	a1 = a[1];

	switch (call) {
	case SYS_SOCKET:
		ret = sys_socket(a0, a1, a[2]);
		break;
	case SYS_BIND:
		ret = sys_bind(a0, compat_ptr(a1), a[2]);
		break;
	case SYS_CONNECT:
		ret = sys_connect(a0, compat_ptr(a1), a[2]);
		break;
	case SYS_LISTEN:
		ret = sys_listen(a0, a1);
		break;
	case SYS_ACCEPT:
		ret = sys_accept(a0, compat_ptr(a1), compat_ptr(a[2]));
		break;
	case SYS_GETSOCKNAME:
		ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
		break;
	case SYS_GETPEERNAME:
		ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
		break;
	case SYS_SOCKETPAIR:
		ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
		break;
	case SYS_SEND:
		ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
		break;
	case SYS_SENDTO:
		ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
		break;
	case SYS_RECV:
		ret = sys_recv(a0, compat_ptr(a1), a[2], a[3]);
		break;
	case SYS_RECVFROM:
		ret = sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), compat_ptr(a[5]));
		break;
	case SYS_SHUTDOWN:
		ret = sys_shutdown(a0,a1);
		break;
	case SYS_SETSOCKOPT:
		ret = compat_sys_setsockopt(a0, a1, a[2],
				compat_ptr(a[3]), a[4]);
		break;
	case SYS_GETSOCKOPT:
		ret = compat_sys_getsockopt(a0, a1, a[2],
				compat_ptr(a[3]), compat_ptr(a[4]));
		break;
	case SYS_SENDMSG:
		ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
		break;
	case SYS_RECVMSG:
		ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
		break;
	default:
		ret = -EINVAL;
		break;
	}
	return ret;
}
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 <[email protected]>
	6	* Copyright (C) 1999 Arun Sharma <[email protected]>
	7	* Copyright (C) 1997,1998 Jakub Jelinek ([email protected])
	8	* Copyright (C) 1997 David S. Miller ([email protected])
	9	* Copyright (C) 2000 Hewlett-Packard Co.
	10	* Copyright (C) 2000 David Mosberger-Tang <[email protected]>
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>
	27	#include <asm/uaccess.h>
	28	#include <net/compat.h>
	29
	30	static inline int iov_from_user_compat_to_kern(struct iovec *kiov,
	31	struct compat_iovec __user *uiov32,
	32	int niov)
	33	{
	34	int tot_len = 0;
	35
e71a4783	36	while (niov > 0) {
1da177e4 LT	37	compat_uptr_t buf;
	38	compat_size_t len;
	39
e71a4783	40	if (get_user(len, &uiov32->iov_len) \|\|
1da177e4 LT	41	get_user(buf, &uiov32->iov_base)) {
	42	tot_len = -EFAULT;
	43	break;
	44	}
	45	tot_len += len;
	46	kiov->iov_base = compat_ptr(buf);
	47	kiov->iov_len = (__kernel_size_t) len;
	48	uiov32++;
	49	kiov++;
	50	niov--;
	51	}
	52	return tot_len;
	53	}
	54
	55	int get_compat_msghdr(struct msghdr kmsg, struct compat_msghdr __user umsg)
	56	{
	57	compat_uptr_t tmp1, tmp2, tmp3;
	58
	59	if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) \|\|
	60	__get_user(tmp1, &umsg->msg_name) \|\|
	61	__get_user(kmsg->msg_namelen, &umsg->msg_namelen) \|\|
	62	__get_user(tmp2, &umsg->msg_iov) \|\|
	63	__get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) \|\|
	64	__get_user(tmp3, &umsg->msg_control) \|\|
	65	__get_user(kmsg->msg_controllen, &umsg->msg_controllen) \|\|
	66	__get_user(kmsg->msg_flags, &umsg->msg_flags))
	67	return -EFAULT;
	68	kmsg->msg_name = compat_ptr(tmp1);
	69	kmsg->msg_iov = compat_ptr(tmp2);
	70	kmsg->msg_control = compat_ptr(tmp3);
	71	return 0;
	72	}
	73
	74	/* I've named the args so it is easy to tell whose space the pointers are in. */
	75	int verify_compat_iovec(struct msghdr kern_msg, struct iovec kern_iov,
	76	char *kern_address, int mode)
	77	{
	78	int tot_len;
	79
e71a4783 SH	80	if (kern_msg->msg_namelen) {
e71a4783 SH	81	if (mode==VERIFY_READ) {
1da177e4 LT	82	int err = move_addr_to_kernel(kern_msg->msg_name,
	83	kern_msg->msg_namelen,
	84	kern_address);
e71a4783	85	if (err < 0)
1da177e4 LT	86	return err;
	87	}
	88	kern_msg->msg_name = kern_address;
	89	} else
	90	kern_msg->msg_name = NULL;
	91
1da177e4 LT	92	tot_len = iov_from_user_compat_to_kern(kern_iov,
	93	(struct compat_iovec __user *)kern_msg->msg_iov,
	94	kern_msg->msg_iovlen);
e71a4783	95	if (tot_len >= 0)
1da177e4	96	kern_msg->msg_iov = kern_iov;
1da177e4 LT	97
	98	return tot_len;
	99	}
	100
	101	/* Bleech... */
	102	#define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32))
	103
	104	#define CMSG_COMPAT_DATA(cmsg) \
	105	((void __user )((char __user )(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))))
	106	#define CMSG_COMPAT_SPACE(len) \
	107	(CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len))
	108	#define CMSG_COMPAT_LEN(len) \
	109	(CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len))
	110
	111	#define CMSG_COMPAT_FIRSTHDR(msg) \
	112	(((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \
	113	(struct compat_cmsghdr __user *)((msg)->msg_control) : \
	114	(struct compat_cmsghdr __user *)NULL)
	115
	116	#define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
	117	((ucmlen) >= sizeof(struct compat_cmsghdr) && \
	118	(ucmlen) <= (unsigned long) \
	119	((mhdr)->msg_controllen - \
	120	((char )(ucmsg) - (char )(mhdr)->msg_control)))
	121
	122	static inline struct compat_cmsghdr __user cmsg_compat_nxthdr(struct msghdr msg,
	123	struct compat_cmsghdr __user *cmsg, int cmsg_len)
	124	{
	125	char __user ptr = (char __user )cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
	126	if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
	127	msg->msg_controllen)
	128	return NULL;
	129	return (struct compat_cmsghdr __user *)ptr;
	130	}
	131
	132	/* There is a lot of hair here because the alignment rules (and
	133	* thus placement) of cmsg headers and length are different for
	134	* 32-bit apps. -DaveM
	135	*/
8920e8f9	136	int cmsghdr_from_user_compat_to_kern(struct msghdr kmsg, struct sock sk,
1da177e4 LT	137	unsigned char *stackbuf, int stackbuf_size)
	138	{
	139	struct compat_cmsghdr __user *ucmsg;
	140	struct cmsghdr kcmsg, kcmsg_base;
	141	compat_size_t ucmlen;
	142	__kernel_size_t kcmlen, tmp;
8920e8f9	143	int err = -EFAULT;
1da177e4 LT	144
	145	kcmlen = 0;
	146	kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
	147	ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
e71a4783 SH	148	while (ucmsg != NULL) {
e71a4783 SH	149	if (get_user(ucmlen, &ucmsg->cmsg_len))
1da177e4 LT	150	return -EFAULT;
	151
	152	/* Catch bogons. */
	153	if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
	154	return -EINVAL;
	155
	156	tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
	157	CMSG_ALIGN(sizeof(struct cmsghdr)));
8920e8f9	158	tmp = CMSG_ALIGN(tmp);
1da177e4 LT	159	kcmlen += tmp;
	160	ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
	161	}
e71a4783	162	if (kcmlen == 0)
1da177e4 LT	163	return -EINVAL;
	164
	165	/* The kcmlen holds the 64-bit version of the control length.
	166	* It may not be modified as we do not stick it into the kmsg
	167	* until we have successfully copied over all of the data
	168	* from the user.
	169	*/
8920e8f9 AV	170	if (kcmlen > stackbuf_size)
	171	kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
	172	if (kcmsg == NULL)
1da177e4 LT	173	return -ENOBUFS;
	174
	175	/* Now copy them over neatly. */
	176	memset(kcmsg, 0, kcmlen);
	177	ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
e71a4783	178	while (ucmsg != NULL) {
8920e8f9 AV	179	if (__get_user(ucmlen, &ucmsg->cmsg_len))
	180	goto Efault;
	181	if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
	182	goto Einval;
1da177e4 LT	183	tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
1da177e4 LT	184	CMSG_ALIGN(sizeof(struct cmsghdr)));
8920e8f9 AV	185	if ((char )kcmsg_base + kcmlen - (char )kcmsg < CMSG_ALIGN(tmp))
8920e8f9 AV	186	goto Einval;
1da177e4	187	kcmsg->cmsg_len = tmp;
8920e8f9 AV	188	tmp = CMSG_ALIGN(tmp);
	189	if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) \|\|
	190	__get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) \|\|
	191	copy_from_user(CMSG_DATA(kcmsg),
	192	CMSG_COMPAT_DATA(ucmsg),
	193	(ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg)))))
	194	goto Efault;
1da177e4 LT	195
1da177e4 LT	196	/* Advance. */
8920e8f9	197	kcmsg = (struct cmsghdr )((char )kcmsg + tmp);
1da177e4 LT	198	ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
	199	}
	200
	201	/* Ok, looks like we made it. Hook it up and return success. */
	202	kmsg->msg_control = kcmsg_base;
	203	kmsg->msg_controllen = kcmlen;
	204	return 0;
	205
8920e8f9 AV	206	Einval:
	207	err = -EINVAL;
	208	Efault:
	209	if (kcmsg_base != (struct cmsghdr *)stackbuf)
	210	sock_kfree_s(sk, kcmsg_base, kcmlen);
	211	return err;
1da177e4 LT	212	}
	213
	214	int put_cmsg_compat(struct msghdr kmsg, int level, int type, int len, void data)
	215	{
	216	struct compat_timeval ctv;
92f37fd2	217	struct compat_timespec cts;
1da177e4 LT	218	struct compat_cmsghdr __user cm = (struct compat_cmsghdr __user ) kmsg->msg_control;
	219	struct compat_cmsghdr cmhdr;
	220	int cmlen;
	221
e71a4783	222	if (cm == NULL \|\| kmsg->msg_controllen < sizeof(*cm)) {
1da177e4 LT	223	kmsg->msg_flags \|= MSG_CTRUNC;
	224	return 0; /* XXX: return error? check spec. */
	225	}
	226
4768fbcb	227	if (level == SOL_SOCKET && type == SO_TIMESTAMP) {
1da177e4 LT	228	struct timeval tv = (struct timeval )data;
	229	ctv.tv_sec = tv->tv_sec;
	230	ctv.tv_usec = tv->tv_usec;
	231	data = &ctv;
92f37fd2 ED	232	len = sizeof(ctv);
	233	}
	234	if (level == SOL_SOCKET && type == SO_TIMESTAMPNS) {
	235	struct timespec ts = (struct timespec )data;
	236	cts.tv_sec = ts->tv_sec;
	237	cts.tv_nsec = ts->tv_nsec;
	238	data = &cts;
	239	len = sizeof(cts);
4768fbcb YH	240	}
4768fbcb YH	241
1da177e4	242	cmlen = CMSG_COMPAT_LEN(len);
e71a4783	243	if (kmsg->msg_controllen < cmlen) {
1da177e4 LT	244	kmsg->msg_flags \|= MSG_CTRUNC;
	245	cmlen = kmsg->msg_controllen;
	246	}
	247	cmhdr.cmsg_level = level;
	248	cmhdr.cmsg_type = type;
	249	cmhdr.cmsg_len = cmlen;
	250
e71a4783	251	if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
1da177e4	252	return -EFAULT;
e71a4783	253	if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
1da177e4 LT	254	return -EFAULT;
1da177e4 LT	255	cmlen = CMSG_COMPAT_SPACE(len);
1ac70e7a WY	256	if (kmsg->msg_controllen < cmlen)
1ac70e7a WY	257	cmlen = kmsg->msg_controllen;
1da177e4 LT	258	kmsg->msg_control += cmlen;
	259	kmsg->msg_controllen -= cmlen;
	260	return 0;
	261	}
	262
	263	void scm_detach_fds_compat(struct msghdr kmsg, struct scm_cookie scm)
	264	{
	265	struct compat_cmsghdr __user cm = (struct compat_cmsghdr __user ) kmsg->msg_control;
	266	int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
	267	int fdnum = scm->fp->count;
	268	struct file **fp = scm->fp->fp;
	269	int __user *cmfptr;
	270	int err = 0, i;
	271
	272	if (fdnum < fdmax)
	273	fdmax = fdnum;
	274
	275	for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
	276	int new_fd;
	277	err = security_file_receive(fp[i]);
	278	if (err)
	279	break;
4a19542e UD	280	err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags
4a19542e UD	281	? O_CLOEXEC : 0);
1da177e4 LT	282	if (err < 0)
	283	break;
	284	new_fd = err;
	285	err = put_user(new_fd, cmfptr);
	286	if (err) {
	287	put_unused_fd(new_fd);
	288	break;
	289	}
	290	/* Bump the usage count and install the file. */
	291	get_file(fp[i]);
	292	fd_install(new_fd, fp[i]);
	293	}
	294
	295	if (i > 0) {
	296	int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
effee6a0	297	err = put_user(SOL_SOCKET, &cm->cmsg_level);
1da177e4 LT	298	if (!err)
	299	err = put_user(SCM_RIGHTS, &cm->cmsg_type);
	300	if (!err)
	301	err = put_user(cmlen, &cm->cmsg_len);
	302	if (!err) {
	303	cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
	304	kmsg->msg_control += cmlen;
	305	kmsg->msg_controllen -= cmlen;
	306	}
	307	}
	308	if (i < fdnum)
	309	kmsg->msg_flags \|= MSG_CTRUNC;
	310
	311	/*
	312	* All of the files that fit in the message have had their
	313	* usage counts incremented, so we just free the list.
	314	*/
	315	__scm_destroy(scm);
	316	}
	317
1da177e4 LT	318	/*
	319	* A struct sock_filter is architecture independent.
	320	*/
	321	struct compat_sock_fprog {
	322	u16 len;
	323	compat_uptr_t filter; /* struct sock_filter * */
	324	};
	325
3fdadf7d	326	static int do_set_attach_filter(struct socket *sock, int level, int optname,
1da177e4 LT	327	char __user *optval, int optlen)
	328	{
	329	struct compat_sock_fprog __user fprog32 = (struct compat_sock_fprog __user )optval;
4768fbcb	330	struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
1da177e4 LT	331	compat_uptr_t ptr;
	332	u16 len;
	333
	334	if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) \|\|
	335	!access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) \|\|
	336	__get_user(len, &fprog32->len) \|\|
	337	__get_user(ptr, &fprog32->filter) \|\|
	338	__put_user(len, &kfprog->len) \|\|
	339	__put_user(compat_ptr(ptr), &kfprog->filter))
	340	return -EFAULT;
	341
3fdadf7d	342	return sock_setsockopt(sock, level, optname, (char __user *)kfprog,
1da177e4 LT	343	sizeof(struct sock_fprog));
	344	}
	345
3fdadf7d DM	346	static int do_set_sock_timeout(struct socket *sock, int level,
3fdadf7d DM	347	int optname, char __user *optval, int optlen)
1da177e4 LT	348	{
	349	struct compat_timeval __user up = (struct compat_timeval __user ) optval;
	350	struct timeval ktime;
	351	mm_segment_t old_fs;
	352	int err;
	353
	354	if (optlen < sizeof(*up))
	355	return -EINVAL;
	356	if (!access_ok(VERIFY_READ, up, sizeof(*up)) \|\|
	357	__get_user(ktime.tv_sec, &up->tv_sec) \|\|
	358	__get_user(ktime.tv_usec, &up->tv_usec))
	359	return -EFAULT;
	360	old_fs = get_fs();
	361	set_fs(KERNEL_DS);
3fdadf7d	362	err = sock_setsockopt(sock, level, optname, (char *) &ktime, sizeof(ktime));
1da177e4 LT	363	set_fs(old_fs);
	364
	365	return err;
	366	}
	367
3fdadf7d DM	368	static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
	369	char __user *optval, int optlen)
	370	{
	371	if (optname == SO_ATTACH_FILTER)
	372	return do_set_attach_filter(sock, level, optname,
	373	optval, optlen);
	374	if (optname == SO_RCVTIMEO \|\| optname == SO_SNDTIMEO)
	375	return do_set_sock_timeout(sock, level, optname, optval, optlen);
	376
	377	return sock_setsockopt(sock, level, optname, optval, optlen);
	378	}
	379
1da177e4 LT	380	asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
	381	char __user *optval, int optlen)
	382	{
3fdadf7d DM	383	int err;
	384	struct socket *sock;
	385
3fdadf7d DM	386	if (optlen < 0)
	387	return -EINVAL;
	388
	389	if ((sock = sockfd_lookup(fd, &err))!=NULL)
	390	{
	391	err = security_socket_setsockopt(sock,level,optname);
	392	if (err) {
	393	sockfd_put(sock);
	394	return err;
	395	}
	396
	397	if (level == SOL_SOCKET)
	398	err = compat_sock_setsockopt(sock, level,
	399	optname, optval, optlen);
	400	else if (sock->ops->compat_setsockopt)
	401	err = sock->ops->compat_setsockopt(sock, level,
	402	optname, optval, optlen);
	403	else
	404	err = sock->ops->setsockopt(sock, level,
	405	optname, optval, optlen);
	406	sockfd_put(sock);
	407	}
	408	return err;
1da177e4 LT	409	}
1da177e4 LT	410
3fdadf7d	411	static int do_get_sock_timeout(struct socket *sock, int level, int optname,
1da177e4 LT	412	char __user optval, int __user optlen)
	413	{
	414	struct compat_timeval __user *up;
	415	struct timeval ktime;
	416	mm_segment_t old_fs;
	417	int len, err;
	418
	419	up = (struct compat_timeval __user *) optval;
	420	if (get_user(len, optlen))
	421	return -EFAULT;
	422	if (len < sizeof(*up))
	423	return -EINVAL;
	424	len = sizeof(ktime);
	425	old_fs = get_fs();
	426	set_fs(KERNEL_DS);
3fdadf7d	427	err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len);
1da177e4 LT	428	set_fs(old_fs);
	429
	430	if (!err) {
	431	if (put_user(sizeof(*up), optlen) \|\|
	432	!access_ok(VERIFY_WRITE, up, sizeof(*up)) \|\|
	433	__put_user(ktime.tv_sec, &up->tv_sec) \|\|
	434	__put_user(ktime.tv_usec, &up->tv_usec))
	435	err = -EFAULT;
	436	}
	437	return err;
	438	}
	439
3fdadf7d	440	static int compat_sock_getsockopt(struct socket *sock, int level, int optname,
1da177e4 LT	441	char __user optval, int __user optlen)
1da177e4 LT	442	{
3fdadf7d DM	443	if (optname == SO_RCVTIMEO \|\| optname == SO_SNDTIMEO)
	444	return do_get_sock_timeout(sock, level, optname, optval, optlen);
	445	return sock_getsockopt(sock, level, optname, optval, optlen);
1da177e4 LT	446	}
1da177e4 LT	447
f0ac2614 SP	448	int compat_sock_get_timestamp(struct sock sk, struct timeval __user userstamp)
	449	{
	450	struct compat_timeval __user *ctv =
	451	(struct compat_timeval __user*) userstamp;
	452	int err = -ENOENT;
b7aa0bf7	453	struct timeval tv;
f0ac2614 SP	454
	455	if (!sock_flag(sk, SOCK_TIMESTAMP))
	456	sock_enable_timestamp(sk);
b7aa0bf7 ED	457	tv = ktime_to_timeval(sk->sk_stamp);
b7aa0bf7 ED	458	if (tv.tv_sec == -1)
f0ac2614	459	return err;
b7aa0bf7 ED	460	if (tv.tv_sec == 0) {
	461	sk->sk_stamp = ktime_get_real();
	462	tv = ktime_to_timeval(sk->sk_stamp);
	463	}
	464	err = 0;
	465	if (put_user(tv.tv_sec, &ctv->tv_sec) \|\|
	466	put_user(tv.tv_usec, &ctv->tv_usec))
f0ac2614 SP	467	err = -EFAULT;
	468	return err;
	469	}
	470	EXPORT_SYMBOL(compat_sock_get_timestamp);
	471
ae40eb1e ED	472	int compat_sock_get_timestampns(struct sock sk, struct timespec __user userstamp)
	473	{
	474	struct compat_timespec __user *ctv =
	475	(struct compat_timespec __user*) userstamp;
	476	int err = -ENOENT;
	477	struct timespec ts;
	478
	479	if (!sock_flag(sk, SOCK_TIMESTAMP))
	480	sock_enable_timestamp(sk);
	481	ts = ktime_to_timespec(sk->sk_stamp);
	482	if (ts.tv_sec == -1)
	483	return err;
	484	if (ts.tv_sec == 0) {
	485	sk->sk_stamp = ktime_get_real();
	486	ts = ktime_to_timespec(sk->sk_stamp);
	487	}
	488	err = 0;
	489	if (put_user(ts.tv_sec, &ctv->tv_sec) \|\|
	490	put_user(ts.tv_nsec, &ctv->tv_nsec))
	491	err = -EFAULT;
	492	return err;
	493	}
	494	EXPORT_SYMBOL(compat_sock_get_timestampns);
	495
3fdadf7d DM	496	asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
	497	char __user optval, int __user optlen)
	498	{
	499	int err;
	500	struct socket *sock;
	501
	502	if ((sock = sockfd_lookup(fd, &err))!=NULL)
	503	{
	504	err = security_socket_getsockopt(sock, level,
	505	optname);
	506	if (err) {
	507	sockfd_put(sock);
	508	return err;
	509	}
	510
	511	if (level == SOL_SOCKET)
	512	err = compat_sock_getsockopt(sock, level,
	513	optname, optval, optlen);
	514	else if (sock->ops->compat_getsockopt)
	515	err = sock->ops->compat_getsockopt(sock, level,
	516	optname, optval, optlen);
	517	else
	518	err = sock->ops->getsockopt(sock, level,
	519	optname, optval, optlen);
	520	sockfd_put(sock);
	521	}
	522	return err;
	523	}
1da177e4 LT	524	/* Argument list sizes for compat_sys_socketcall */
	525	#define AL(x) ((x) * sizeof(u32))
	526	static unsigned char nas[18]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
	527	AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
	528	AL(6),AL(2),AL(5),AL(5),AL(3),AL(3)};
	529	#undef AL
	530
	531	asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags)
	532	{
	533	return sys_sendmsg(fd, (struct msghdr __user *)msg, flags \| MSG_CMSG_COMPAT);
	534	}
	535
	536	asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
	537	{
	538	return sys_recvmsg(fd, (struct msghdr __user *)msg, flags \| MSG_CMSG_COMPAT);
	539	}
	540
	541	asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
	542	{
	543	int ret;
	544	u32 a[6];
	545	u32 a0, a1;
4768fbcb	546
1da177e4 LT	547	if (call < SYS_SOCKET \|\| call > SYS_RECVMSG)
	548	return -EINVAL;
	549	if (copy_from_user(a, args, nas[call]))
	550	return -EFAULT;
	551	a0 = a[0];
	552	a1 = a[1];
4768fbcb	553
e71a4783	554	switch (call) {
1da177e4 LT	555	case SYS_SOCKET:
	556	ret = sys_socket(a0, a1, a[2]);
	557	break;
	558	case SYS_BIND:
	559	ret = sys_bind(a0, compat_ptr(a1), a[2]);
	560	break;
	561	case SYS_CONNECT:
	562	ret = sys_connect(a0, compat_ptr(a1), a[2]);
	563	break;
	564	case SYS_LISTEN:
	565	ret = sys_listen(a0, a1);
	566	break;
	567	case SYS_ACCEPT:
	568	ret = sys_accept(a0, compat_ptr(a1), compat_ptr(a[2]));
	569	break;
	570	case SYS_GETSOCKNAME:
	571	ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
	572	break;
	573	case SYS_GETPEERNAME:
	574	ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
	575	break;
	576	case SYS_SOCKETPAIR:
	577	ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
	578	break;
	579	case SYS_SEND:
	580	ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
	581	break;
	582	case SYS_SENDTO:
	583	ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
	584	break;
	585	case SYS_RECV:
	586	ret = sys_recv(a0, compat_ptr(a1), a[2], a[3]);
	587	break;
	588	case SYS_RECVFROM:
	589	ret = sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), compat_ptr(a[5]));
	590	break;
	591	case SYS_SHUTDOWN:
	592	ret = sys_shutdown(a0,a1);
	593	break;
	594	case SYS_SETSOCKOPT:
	595	ret = compat_sys_setsockopt(a0, a1, a[2],
	596	compat_ptr(a[3]), a[4]);
	597	break;
	598	case SYS_GETSOCKOPT:
	599	ret = compat_sys_getsockopt(a0, a1, a[2],
	600	compat_ptr(a[3]), compat_ptr(a[4]));
	601	break;
	602	case SYS_SENDMSG:
	603	ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
	604	break;
	605	case SYS_RECVMSG:
	606	ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
	607	break;
	608	default:
	609	ret = -EINVAL;
	610	break;
	611	}
	612	return ret;
	613	}