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/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/filter.h>
  22 #include <linux/compat.h>
  23 #include <linux/netfilter_ipv4/ip_tables.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 *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 *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         if(kern_msg->msg_iovlen > UIO_FASTIOV) {
  93                 kern_iov = kmalloc(kern_msg->msg_iovlen * sizeof(struct iovec),
  94                                    GFP_KERNEL);
  95                 if(!kern_iov)
  96                         return -ENOMEM;
  97         }
  98
  99         tot_len = iov_from_user_compat_to_kern(kern_iov,
 100                                           (struct compat_iovec *)kern_msg->msg_iov,
 101                                           kern_msg->msg_iovlen);
 102         if(tot_len >= 0)
 103                 kern_msg->msg_iov = kern_iov;
 104         else if(kern_msg->msg_iovlen > UIO_FASTIOV)
 105                 kfree(kern_iov);
 106
 107         return tot_len;
 108 }
 109
 110 /* Bleech... */
 111 #define CMSG_COMPAT_ALIGN(len)  ALIGN((len), sizeof(s32))
 112
 113 #define CMSG_COMPAT_DATA(cmsg)                          \
 114         ((void *)((char *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))))
 115 #define CMSG_COMPAT_SPACE(len)                          \
 116         (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len))
 117 #define CMSG_COMPAT_LEN(len)                            \
 118         (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len))
 119
 120 #define CMSG_COMPAT_FIRSTHDR(msg)                       \
 121         (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ?     \
 122          (struct compat_cmsghdr *)((msg)->msg_control) :                \
 123          (struct compat_cmsghdr *)NULL)
 124
 125 static inline struct compat_cmsghdr *cmsg_compat_nxthdr(struct msghdr *msg,
 126                 struct compat_cmsghdr *cmsg, int cmsg_len)
 127 {
 128         struct compat_cmsghdr *ptr;
 129
 130         ptr = (struct compat_cmsghdr *)(((unsigned char *)cmsg) +
 131                         CMSG_COMPAT_ALIGN(cmsg_len));
 132         if ((unsigned long)((char *)(ptr + 1) - (char *)msg->msg_control) >
 133                         msg->msg_controllen)
 134                 return NULL;
 135         return ptr;
 136 }
 137
 138 /* There is a lot of hair here because the alignment rules (and
 139  * thus placement) of cmsg headers and length are different for
 140  * 32-bit apps.  -DaveM
 141  */
 142 int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg,
 143                                unsigned char *stackbuf, int stackbuf_size)
 144 {
 145         struct compat_cmsghdr *ucmsg;
 146         struct cmsghdr *kcmsg, *kcmsg_base;
 147         compat_size_t ucmlen;
 148         __kernel_size_t kcmlen, tmp;
 149
 150         kcmlen = 0;
 151         kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
 152         ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
 153         while(ucmsg != NULL) {
 154                 if(get_user(ucmlen, &ucmsg->cmsg_len))
 155                         return -EFAULT;
 156
 157                 /* Catch bogons. */
 158                 if(CMSG_COMPAT_ALIGN(ucmlen) <
 159                    CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)))
 160                         return -EINVAL;
 161                 if((unsigned long)(((char *)ucmsg - (char *)kmsg->msg_control)
 162                                    + ucmlen) > kmsg->msg_controllen)
 163                         return -EINVAL;
 164
 165                 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
 166                        CMSG_ALIGN(sizeof(struct cmsghdr)));
 167                 kcmlen += tmp;
 168                 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
 169         }
 170         if(kcmlen == 0)
 171                 return -EINVAL;
 172
 173         /* The kcmlen holds the 64-bit version of the control length.
 174          * It may not be modified as we do not stick it into the kmsg
 175          * until we have successfully copied over all of the data
 176          * from the user.
 177          */
 178         if(kcmlen > stackbuf_size)
 179                 kcmsg_base = kcmsg = kmalloc(kcmlen, GFP_KERNEL);
 180         if(kcmsg == NULL)
 181                 return -ENOBUFS;
 182
 183         /* Now copy them over neatly. */
 184         memset(kcmsg, 0, kcmlen);
 185         ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
 186         while(ucmsg != NULL) {
 187                 __get_user(ucmlen, &ucmsg->cmsg_len);
 188                 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
 189                        CMSG_ALIGN(sizeof(struct cmsghdr)));
 190                 kcmsg->cmsg_len = tmp;
 191                 __get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level);
 192                 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type);
 193
 194                 /* Copy over the data. */
 195                 if(copy_from_user(CMSG_DATA(kcmsg),
 196                                   CMSG_COMPAT_DATA(ucmsg),
 197                                   (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg)))))
 198                         goto out_free_efault;
 199
 200                 /* Advance. */
 201                 kcmsg = (struct cmsghdr *)((char *)kcmsg + CMSG_ALIGN(tmp));
 202                 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
 203         }
 204
 205         /* Ok, looks like we made it.  Hook it up and return success. */
 206         kmsg->msg_control = kcmsg_base;
 207         kmsg->msg_controllen = kcmlen;
 208         return 0;
 209
 210 out_free_efault:
 211         if(kcmsg_base != (struct cmsghdr *)stackbuf)
 212                 kfree(kcmsg_base);
 213         return -EFAULT;
 214 }
 215
 216 int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
 217 {
 218         struct compat_cmsghdr *cm = (struct compat_cmsghdr *) kmsg->msg_control;
 219         struct compat_cmsghdr cmhdr;
 220         int cmlen = CMSG_COMPAT_LEN(len);
 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(kmsg->msg_controllen < cmlen) {
 228                 kmsg->msg_flags |= MSG_CTRUNC;
 229                 cmlen = kmsg->msg_controllen;
 230         }
 231         cmhdr.cmsg_level = level;
 232         cmhdr.cmsg_type = type;
 233         cmhdr.cmsg_len = cmlen;
 234
 235         if(copy_to_user(cm, &cmhdr, sizeof cmhdr))
 236                 return -EFAULT;
 237         if(copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
 238                 return -EFAULT;
 239         cmlen = CMSG_COMPAT_SPACE(len);
 240         kmsg->msg_control += cmlen;
 241         kmsg->msg_controllen -= cmlen;
 242         return 0;
 243 }
 244
 245 void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
 246 {
 247         struct compat_cmsghdr *cm = (struct compat_cmsghdr *) kmsg->msg_control;
 248         int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
 249         int fdnum = scm->fp->count;
 250         struct file **fp = scm->fp->fp;
 251         int *cmfptr;
 252         int err = 0, i;
 253
 254         if (fdnum < fdmax)
 255                 fdmax = fdnum;
 256
 257         for (i = 0, cmfptr = (int *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
 258                 int new_fd;
 259                 err = get_unused_fd();
 260                 if (err < 0)
 261                         break;
 262                 new_fd = err;
 263                 err = put_user(new_fd, cmfptr);
 264                 if (err) {
 265                         put_unused_fd(new_fd);
 266                         break;
 267                 }
 268                 /* Bump the usage count and install the file. */
 269                 get_file(fp[i]);
 270                 fd_install(new_fd, fp[i]);
 271         }
 272
 273         if (i > 0) {
 274                 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
 275                 if (!err)
 276                         err = put_user(SOL_SOCKET, &cm->cmsg_level);
 277                 if (!err)
 278                         err = put_user(SCM_RIGHTS, &cm->cmsg_type);
 279                 if (!err)
 280                         err = put_user(cmlen, &cm->cmsg_len);
 281                 if (!err) {
 282                         cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
 283                         kmsg->msg_control += cmlen;
 284                         kmsg->msg_controllen -= cmlen;
 285                 }
 286         }
 287         if (i < fdnum)
 288                 kmsg->msg_flags |= MSG_CTRUNC;
 289
 290         /*
 291          * All of the files that fit in the message have had their
 292          * usage counts incremented, so we just free the list.
 293          */
 294         __scm_destroy(scm);
 295 }
 296
 297 extern asmlinkage long sys_setsockopt(int fd, int level, int optname,
 298                                      char *optval, int optlen);
 299
 300 /*
 301  * For now, we assume that the compatibility and native version
 302  * of struct ipt_entry are the same - sfr.  FIXME
 303  */
 304 struct compat_ipt_replace {
 305         char                    name[IPT_TABLE_MAXNAMELEN];
 306         u32                     valid_hooks;
 307         u32                     num_entries;
 308         u32                     size;
 309         u32                     hook_entry[NF_IP_NUMHOOKS];
 310         u32                     underflow[NF_IP_NUMHOOKS];
 311         u32                     num_counters;
 312         compat_uptr_t           counters;       /* struct ipt_counters * */
 313         struct ipt_entry        entries[0];
 314 };
 315
 316 static int do_netfilter_replace(int fd, int level, int optname,
 317                                 char *optval, int optlen)
 318 {
 319         struct compat_ipt_replace *urepl = (struct compat_ipt_replace *)optval;
 320         struct ipt_replace *krepl;
 321         u32 origsize;
 322         unsigned int kreplsize;
 323         mm_segment_t old_fs;
 324         int ret;
 325         int i;
 326         compat_uptr_t ucntrs;
 327
 328         if (get_user(origsize, &urepl->size))
 329                 return -EFAULT;
 330
 331         /* Hack: Causes ipchains to give correct error msg --RR */
 332         if (optlen != sizeof(*urepl) + origsize)
 333                 return -ENOPROTOOPT;
 334
 335         /* XXX Assumes that size of ipt_entry is the same both in
 336          *     native and compat environments.
 337          */
 338         kreplsize = sizeof(*krepl) + origsize;
 339         krepl = (struct ipt_replace *)kmalloc(kreplsize, GFP_KERNEL);
 340         if (krepl == NULL)
 341                 return -ENOMEM;
 342
 343         ret = -EFAULT;
 344         krepl->size = origsize;
 345         if (!access_ok(VERIFY_READ, urepl, optlen) ||
 346             __copy_from_user(krepl->name, urepl->name, sizeof(urepl->name)) ||
 347             __get_user(krepl->valid_hooks, &urepl->valid_hooks) ||
 348             __get_user(krepl->num_entries, &urepl->num_entries) ||
 349             __get_user(krepl->num_counters, &urepl->num_counters) ||
 350             __get_user(ucntrs, &urepl->counters) ||
 351             __copy_from_user(krepl->entries, &urepl->entries, origsize))
 352                 goto out_free;
 353         for (i = 0; i < NF_IP_NUMHOOKS; i++) {
 354                 if (__get_user(krepl->hook_entry[i], &urepl->hook_entry[i]) ||
 355                     __get_user(krepl->underflow[i], &urepl->underflow[i]))
 356                         goto out_free;
 357         }
 358
 359         /*
 360          * Since struct ipt_counters just contains two u_int64_t members
 361          * we can just do the access_ok check here and pass the (converted)
 362          * pointer into the standard syscall.  We hope that the pointer is
 363          * not misaligned ...
 364          */
 365         krepl->counters = compat_ptr(ucntrs);
 366         if (!access_ok(VERIFY_WRITE, krepl->counters,
 367                         krepl->num_counters * sizeof(struct ipt_counters)))
 368                 goto out_free;
 369
 370         old_fs = get_fs();
 371         set_fs(KERNEL_DS);
 372         ret = sys_setsockopt(fd, level, optname, (char *)krepl, kreplsize);
 373         set_fs(old_fs);
 374
 375 out_free:
 376         kfree(krepl);
 377         return ret;
 378 }
 379
 380 /*
 381  * A struct sock_filter is architecture independent.
 382  */
 383 struct compat_sock_fprog {
 384         u16             len;
 385         compat_uptr_t   filter;         /* struct sock_filter * */
 386 };
 387
 388 static int do_set_attach_filter(int fd, int level, int optname,
 389                                 char *optval, int optlen)
 390 {
 391         struct compat_sock_fprog *fprog32 = (struct compat_sock_fprog *)optval;
 392         struct sock_fprog *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
 393         compat_uptr_t ptr;
 394         u16 len;
 395
 396         if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) ||
 397             !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) ||
 398             __get_user(len, &fprog32->len) ||
 399             __get_user(ptr, &fprog32->filter) ||
 400             __put_user(len, &kfprog->len) ||
 401             __put_user(compat_ptr(ptr), &kfprog->filter))
 402                 return -EFAULT;
 403
 404         return sys_setsockopt(fd, level, optname, (char *)kfprog,
 405                               sizeof(struct sock_fprog));
 406 }
 407
 408 static int do_set_sock_timeout(int fd, int level, int optname, char *optval, int optlen)
 409 {
 410         struct compat_timeval *up = (struct compat_timeval *) optval;
 411         struct timeval ktime;
 412         mm_segment_t old_fs;
 413         int err;
 414
 415         if (optlen < sizeof(*up))
 416                 return -EINVAL;
 417         if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 418             __get_user(ktime.tv_sec, &up->tv_sec) ||
 419             __get_user(ktime.tv_usec, &up->tv_usec))
 420                 return -EFAULT;
 421         old_fs = get_fs();
 422         set_fs(KERNEL_DS);
 423         err = sys_setsockopt(fd, level, optname, (char *) &ktime, sizeof(ktime));
 424         set_fs(old_fs);
 425
 426         return err;
 427 }
 428
 429 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
 430                                 char *optval, int optlen)
 431 {
 432         if (optname == IPT_SO_SET_REPLACE)
 433                 return do_netfilter_replace(fd, level, optname,
 434                                             optval, optlen);
 435         if (optname == SO_ATTACH_FILTER)
 436                 return do_set_attach_filter(fd, level, optname,
 437                                             optval, optlen);
 438         if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
 439                 return do_set_sock_timeout(fd, level, optname, optval, optlen);
 440
 441         return sys_setsockopt(fd, level, optname, optval, optlen);
 442 }
 443
 444 extern asmlinkage long sys_getsockopt(int fd, int level, int optname,
 445                                        void * optval, int *optlen);
 446
 447 static int do_get_sock_timeout(int fd, int level, int optname, char *optval,
 448                 int *optlen)
 449 {
 450         struct compat_timeval *up = (struct compat_timeval *) optval;
 451         struct timeval ktime;
 452         mm_segment_t old_fs;
 453         int len, err;
 454
 455         if (get_user(len, optlen))
 456                 return -EFAULT;
 457         if (len < sizeof(*up))
 458                 return -EINVAL;
 459         len = sizeof(ktime);
 460         old_fs = get_fs();
 461         set_fs(KERNEL_DS);
 462         err = sys_getsockopt(fd, level, optname, (char *) &ktime, &len);
 463         set_fs(old_fs);
 464
 465         if (!err) {
 466                 if (put_user(sizeof(*up), optlen) ||
 467                     !access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
 468                     __put_user(ktime.tv_sec, &up->tv_sec) ||
 469                     __put_user(ktime.tv_usec, &up->tv_usec))
 470                         err = -EFAULT;
 471         }
 472         return err;
 473 }
 474
 475 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
 476                                 char *optval, int *optlen)
 477 {
 478         if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
 479                 return do_get_sock_timeout(fd, level, optname, optval, optlen);
 480         return sys_getsockopt(fd, level, optname, optval, optlen);
 481 }
 482
 483 /* Argument list sizes for compat_sys_socketcall */
 484 #define AL(x) ((x) * sizeof(u32))
 485 static unsigned char nas[18]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
 486                                 AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
 487                                 AL(6),AL(2),AL(5),AL(5),AL(3),AL(3)};
 488 #undef AL
 489
 490 extern asmlinkage long sys_bind(int, struct sockaddr *, int);
 491 extern asmlinkage long sys_connect(int, struct sockaddr *, int);
 492 extern asmlinkage long sys_accept(int, struct sockaddr *, int *);
 493 extern asmlinkage long sys_getsockname(int, struct sockaddr *, int *);
 494 extern asmlinkage long sys_getpeername(int, struct sockaddr *, int *);
 495 extern asmlinkage long sys_send(int, void *, size_t, unsigned);
 496 extern asmlinkage long sys_sendto(int, void *, size_t, unsigned,
 497                 struct sockaddr *, int);
 498 extern asmlinkage long sys_recv(int, void *, size_t, unsigned);
 499 extern asmlinkage long sys_recvfrom(int, void *, size_t, unsigned,
 500                 struct sockaddr *, int *);
 501 extern asmlinkage long sys_socket(int, int, int);
 502 extern asmlinkage long sys_socketpair(int, int, int, int [2]);
 503 extern asmlinkage long sys_shutdown(int, int);
 504 extern asmlinkage long sys_listen(int, int);
 505
 506 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr *msg, unsigned flags)
 507 {
 508         return sys_sendmsg(fd, (struct msghdr *)msg, flags | MSG_CMSG_COMPAT);
 509 }
 510
 511 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr *msg, unsigned int flags)
 512 {
 513         return sys_recvmsg(fd, (struct msghdr *)msg, flags | MSG_CMSG_COMPAT);
 514 }
 515
 516 asmlinkage long compat_sys_socketcall(int call, u32 *args)
 517 {
 518         int ret;
 519         u32 a[6];
 520         u32 a0, a1;
 521
 522         if (call < SYS_SOCKET || call > SYS_RECVMSG)
 523                 return -EINVAL;
 524         if (copy_from_user(a, args, nas[call]))
 525                 return -EFAULT;
 526         a0 = a[0];
 527         a1 = a[1];
 528
 529         switch(call) {
 530         case SYS_SOCKET:
 531                 ret = sys_socket(a0, a1, a[2]);
 532                 break;
 533         case SYS_BIND:
 534                 ret = sys_bind(a0, compat_ptr(a1), a[2]);
 535                 break;
 536         case SYS_CONNECT:
 537                 ret = sys_connect(a0, compat_ptr(a1), a[2]);
 538                 break;
 539         case SYS_LISTEN:
 540                 ret = sys_listen(a0, a1);
 541                 break;
 542         case SYS_ACCEPT:
 543                 ret = sys_accept(a0, compat_ptr(a1), compat_ptr(a[2]));
 544                 break;
 545         case SYS_GETSOCKNAME:
 546                 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
 547                 break;
 548         case SYS_GETPEERNAME:
 549                 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
 550                 break;
 551         case SYS_SOCKETPAIR:
 552                 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
 553                 break;
 554         case SYS_SEND:
 555                 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
 556                 break;
 557         case SYS_SENDTO:
 558                 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
 559                 break;
 560         case SYS_RECV:
 561                 ret = sys_recv(a0, compat_ptr(a1), a[2], a[3]);
 562                 break;
 563         case SYS_RECVFROM:
 564                 ret = sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), compat_ptr(a[5]));
 565                 break;
 566         case SYS_SHUTDOWN:
 567                 ret = sys_shutdown(a0,a1);
 568                 break;
 569         case SYS_SETSOCKOPT:
 570                 ret = compat_sys_setsockopt(a0, a1, a[2],
 571                                 compat_ptr(a[3]), a[4]);
 572                 break;
 573         case SYS_GETSOCKOPT:
 574                 ret = compat_sys_getsockopt(a0, a1, a[2],
 575                                 compat_ptr(a[3]), compat_ptr(a[4]));
 576                 break;
 577         case SYS_SENDMSG:
 578                 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
 579                 break;
 580         case SYS_RECVMSG:
 581                 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
 582                 break;
 583         default:
 584                 ret = -EINVAL;
 585                 break;
 586         }
 587         return ret;
 588 }