net/compat.c

   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/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>
  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
  36         while (niov > 0) {
  37                 compat_uptr_t buf;
  38                 compat_size_t len;
  39
  40                 if (get_user(len, &uiov32->iov_len) ||
  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
  80         if (kern_msg->msg_namelen) {
  81                 if (mode==VERIFY_READ) {
  82                         int err = move_addr_to_kernel(kern_msg->msg_name,
  83                                                       kern_msg->msg_namelen,
  84                                                       kern_address);
  85                         if (err < 0)
  86                                 return err;
  87                 }
  88                 kern_msg->msg_name = kern_address;
  89         } else
  90                 kern_msg->msg_name = NULL;
  91
  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);
  95         if (tot_len >= 0)
  96                 kern_msg->msg_iov = kern_iov;
  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  */
 136 int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
 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;
 143         int err = -EFAULT;
 144
 145         kcmlen = 0;
 146         kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
 147         ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
 148         while (ucmsg != NULL) {
 149                 if (get_user(ucmlen, &ucmsg->cmsg_len))
 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)));
 158                 tmp = CMSG_ALIGN(tmp);
 159                 kcmlen += tmp;
 160                 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
 161         }
 162         if (kcmlen == 0)
 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          */
 170         if (kcmlen > stackbuf_size)
 171                 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
 172         if (kcmsg == NULL)
 173                 return -ENOBUFS;
 174
 175         /* Now copy them over neatly. */
 176         memset(kcmsg, 0, kcmlen);
 177         ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
 178         while (ucmsg != NULL) {
 179                 if (__get_user(ucmlen, &ucmsg->cmsg_len))
 180                         goto Efault;
 181                 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
 182                         goto Einval;
 183                 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
 184                        CMSG_ALIGN(sizeof(struct cmsghdr)));
 185                 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
 186                         goto Einval;
 187                 kcmsg->cmsg_len = tmp;
 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;
 195
 196                 /* Advance. */
 197                 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
 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
 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;
 212 }
 213
 214 int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
 215 {
 216         struct compat_timeval ctv;
 217         struct compat_timespec cts;
 218         struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
 219         struct compat_cmsghdr cmhdr;
 220         int cmlen;
 221
 222         if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
 223                 kmsg->msg_flags |= MSG_CTRUNC;
 224                 return 0; /* XXX: return error? check spec. */
 225         }
 226
 227         if (level == SOL_SOCKET && type == SO_TIMESTAMP) {
 228                 struct timeval *tv = (struct timeval *)data;
 229                 ctv.tv_sec = tv->tv_sec;
 230                 ctv.tv_usec = tv->tv_usec;
 231                 data = &ctv;
 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);
 240         }
 241
 242         cmlen = CMSG_COMPAT_LEN(len);
 243         if (kmsg->msg_controllen < cmlen) {
 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
 251         if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
 252                 return -EFAULT;
 253         if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
 254                 return -EFAULT;
 255         cmlen = CMSG_COMPAT_SPACE(len);
 256         if (kmsg->msg_controllen < cmlen)
 257                 cmlen = kmsg->msg_controllen;
 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;
 280                 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags
 281                                           ? O_CLOEXEC : 0);
 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));
 297                 err = put_user(SOL_SOCKET, &cm->cmsg_level);
 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
 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
 326 static int do_set_attach_filter(struct socket *sock, int level, int optname,
 327                                 char __user *optval, int optlen)
 328 {
 329         struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
 330         struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
 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
 342         return sock_setsockopt(sock, level, optname, (char __user *)kfprog,
 343                               sizeof(struct sock_fprog));
 344 }
 345
 346 static int do_set_sock_timeout(struct socket *sock, int level,
 347                 int optname, char __user *optval, int optlen)
 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);
 362         err = sock_setsockopt(sock, level, optname, (char *) &ktime, sizeof(ktime));
 363         set_fs(old_fs);
 364
 365         return err;
 366 }
 367
 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
 380 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
 381                                 char __user *optval, int optlen)
 382 {
 383         int err;
 384         struct socket *sock;
 385
 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;
 409 }
 410
 411 static int do_get_sock_timeout(struct socket *sock, int level, int optname,
 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);
 427         err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len);
 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
 440 static int compat_sock_getsockopt(struct socket *sock, int level, int optname,
 441                                 char __user *optval, int __user *optlen)
 442 {
 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);
 446 }
 447
 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;
 453         struct timeval tv;
 454
 455         if (!sock_flag(sk, SOCK_TIMESTAMP))
 456                 sock_enable_timestamp(sk);
 457         tv = ktime_to_timeval(sk->sk_stamp);
 458         if (tv.tv_sec == -1)
 459                 return err;
 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))
 467                 err = -EFAULT;
 468         return err;
 469 }
 470 EXPORT_SYMBOL(compat_sock_get_timestamp);
 471
 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
 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 }
 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;
 546
 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];
 553
 554         switch (call) {
 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 }