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/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         if(kern_msg->msg_iovlen > UIO_FASTIOV) {
  95                 kern_iov = kmalloc(kern_msg->msg_iovlen * sizeof(struct iovec),
  96                                    GFP_KERNEL);
  97                 if(!kern_iov)
  98                         return -ENOMEM;
  99         }
 100
 101         tot_len = iov_from_user_compat_to_kern(kern_iov,
 102                                           (struct compat_iovec __user *)kern_msg->msg_iov,
 103                                           kern_msg->msg_iovlen);
 104         if(tot_len >= 0)
 105                 kern_msg->msg_iov = kern_iov;
 106         else if(kern_msg->msg_iovlen > UIO_FASTIOV)
 107                 kfree(kern_iov);
 108
 109         return tot_len;
 110 }
 111
 112 /* Bleech... */
 113 #define CMSG_COMPAT_ALIGN(len)  ALIGN((len), sizeof(s32))
 114
 115 #define CMSG_COMPAT_DATA(cmsg)                          \
 116         ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))))
 117 #define CMSG_COMPAT_SPACE(len)                          \
 118         (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len))
 119 #define CMSG_COMPAT_LEN(len)                            \
 120         (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len))
 121
 122 #define CMSG_COMPAT_FIRSTHDR(msg)                       \
 123         (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ?     \
 124          (struct compat_cmsghdr __user *)((msg)->msg_control) :         \
 125          (struct compat_cmsghdr __user *)NULL)
 126
 127 #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
 128         ((ucmlen) >= sizeof(struct compat_cmsghdr) && \
 129          (ucmlen) <= (unsigned long) \
 130          ((mhdr)->msg_controllen - \
 131           ((char *)(ucmsg) - (char *)(mhdr)->msg_control)))
 132
 133 static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
 134                 struct compat_cmsghdr __user *cmsg, int cmsg_len)
 135 {
 136         char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
 137         if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
 138                         msg->msg_controllen)
 139                 return NULL;
 140         return (struct compat_cmsghdr __user *)ptr;
 141 }
 142
 143 /* There is a lot of hair here because the alignment rules (and
 144  * thus placement) of cmsg headers and length are different for
 145  * 32-bit apps.  -DaveM
 146  */
 147 int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg,
 148                                unsigned char *stackbuf, int stackbuf_size)
 149 {
 150         struct compat_cmsghdr __user *ucmsg;
 151         struct cmsghdr *kcmsg, *kcmsg_base;
 152         compat_size_t ucmlen;
 153         __kernel_size_t kcmlen, tmp;
 154
 155         kcmlen = 0;
 156         kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
 157         ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
 158         while(ucmsg != NULL) {
 159                 if(get_user(ucmlen, &ucmsg->cmsg_len))
 160                         return -EFAULT;
 161
 162                 /* Catch bogons. */
 163                 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
 164                         return -EINVAL;
 165
 166                 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
 167                        CMSG_ALIGN(sizeof(struct cmsghdr)));
 168                 kcmlen += tmp;
 169                 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
 170         }
 171         if(kcmlen == 0)
 172                 return -EINVAL;
 173
 174         /* The kcmlen holds the 64-bit version of the control length.
 175          * It may not be modified as we do not stick it into the kmsg
 176          * until we have successfully copied over all of the data
 177          * from the user.
 178          */
 179         if(kcmlen > stackbuf_size)
 180                 kcmsg_base = kcmsg = kmalloc(kcmlen, GFP_KERNEL);
 181         if(kcmsg == NULL)
 182                 return -ENOBUFS;
 183
 184         /* Now copy them over neatly. */
 185         memset(kcmsg, 0, kcmlen);
 186         ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
 187         while(ucmsg != NULL) {
 188                 __get_user(ucmlen, &ucmsg->cmsg_len);
 189                 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
 190                        CMSG_ALIGN(sizeof(struct cmsghdr)));
 191                 kcmsg->cmsg_len = tmp;
 192                 __get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level);
 193                 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type);
 194
 195                 /* Copy over the data. */
 196                 if(copy_from_user(CMSG_DATA(kcmsg),
 197                                   CMSG_COMPAT_DATA(ucmsg),
 198                                   (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg)))))
 199                         goto out_free_efault;
 200
 201                 /* Advance. */
 202                 kcmsg = (struct cmsghdr *)((char *)kcmsg + CMSG_ALIGN(tmp));
 203                 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
 204         }
 205
 206         /* Ok, looks like we made it.  Hook it up and return success. */
 207         kmsg->msg_control = kcmsg_base;
 208         kmsg->msg_controllen = kcmlen;
 209         return 0;
 210
 211 out_free_efault:
 212         if(kcmsg_base != (struct cmsghdr *)stackbuf)
 213                 kfree(kcmsg_base);
 214         return -EFAULT;
 215 }
 216
 217 int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
 218 {
 219         struct compat_timeval ctv;
 220         struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
 221         struct compat_cmsghdr cmhdr;
 222         int cmlen;
 223
 224         if(cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
 225                 kmsg->msg_flags |= MSG_CTRUNC;
 226                 return 0; /* XXX: return error? check spec. */
 227         }
 228
 229         if (level == SOL_SOCKET && type == SO_TIMESTAMP) {
 230                 struct timeval *tv = (struct timeval *)data;
 231                 ctv.tv_sec = tv->tv_sec;
 232                 ctv.tv_usec = tv->tv_usec;
 233                 data = &ctv;
 234                 len = sizeof(struct compat_timeval);
 235         }
 236
 237         cmlen = CMSG_COMPAT_LEN(len);
 238         if(kmsg->msg_controllen < cmlen) {
 239                 kmsg->msg_flags |= MSG_CTRUNC;
 240                 cmlen = kmsg->msg_controllen;
 241         }
 242         cmhdr.cmsg_level = level;
 243         cmhdr.cmsg_type = type;
 244         cmhdr.cmsg_len = cmlen;
 245
 246         if(copy_to_user(cm, &cmhdr, sizeof cmhdr))
 247                 return -EFAULT;
 248         if(copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
 249                 return -EFAULT;
 250         cmlen = CMSG_COMPAT_SPACE(len);
 251         kmsg->msg_control += cmlen;
 252         kmsg->msg_controllen -= cmlen;
 253         return 0;
 254 }
 255
 256 void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
 257 {
 258         struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
 259         int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
 260         int fdnum = scm->fp->count;
 261         struct file **fp = scm->fp->fp;
 262         int __user *cmfptr;
 263         int err = 0, i;
 264
 265         if (fdnum < fdmax)
 266                 fdmax = fdnum;
 267
 268         for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
 269                 int new_fd;
 270                 err = security_file_receive(fp[i]);
 271                 if (err)
 272                         break;
 273                 err = get_unused_fd();
 274                 if (err < 0)
 275                         break;
 276                 new_fd = err;
 277                 err = put_user(new_fd, cmfptr);
 278                 if (err) {
 279                         put_unused_fd(new_fd);
 280                         break;
 281                 }
 282                 /* Bump the usage count and install the file. */
 283                 get_file(fp[i]);
 284                 fd_install(new_fd, fp[i]);
 285         }
 286
 287         if (i > 0) {
 288                 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
 289                 if (!err)
 290                         err = put_user(SOL_SOCKET, &cm->cmsg_level);
 291                 if (!err)
 292                         err = put_user(SCM_RIGHTS, &cm->cmsg_type);
 293                 if (!err)
 294                         err = put_user(cmlen, &cm->cmsg_len);
 295                 if (!err) {
 296                         cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
 297                         kmsg->msg_control += cmlen;
 298                         kmsg->msg_controllen -= cmlen;
 299                 }
 300         }
 301         if (i < fdnum)
 302                 kmsg->msg_flags |= MSG_CTRUNC;
 303
 304         /*
 305          * All of the files that fit in the message have had their
 306          * usage counts incremented, so we just free the list.
 307          */
 308         __scm_destroy(scm);
 309 }
 310
 311 /*
 312  * For now, we assume that the compatibility and native version
 313  * of struct ipt_entry are the same - sfr.  FIXME
 314  */
 315 struct compat_ipt_replace {
 316         char                    name[IPT_TABLE_MAXNAMELEN];
 317         u32                     valid_hooks;
 318         u32                     num_entries;
 319         u32                     size;
 320         u32                     hook_entry[NF_IP_NUMHOOKS];
 321         u32                     underflow[NF_IP_NUMHOOKS];
 322         u32                     num_counters;
 323         compat_uptr_t           counters;       /* struct ipt_counters * */
 324         struct ipt_entry        entries[0];
 325 };
 326
 327 static int do_netfilter_replace(int fd, int level, int optname,
 328                                 char __user *optval, int optlen)
 329 {
 330         struct compat_ipt_replace __user *urepl;
 331         struct ipt_replace __user *repl_nat;
 332         char name[IPT_TABLE_MAXNAMELEN];
 333         u32 origsize, tmp32, num_counters;
 334         unsigned int repl_nat_size;
 335         int ret;
 336         int i;
 337         compat_uptr_t ucntrs;
 338
 339         urepl = (struct compat_ipt_replace __user *)optval;
 340         if (get_user(origsize, &urepl->size))
 341                 return -EFAULT;
 342
 343         /* Hack: Causes ipchains to give correct error msg --RR */
 344         if (optlen != sizeof(*urepl) + origsize)
 345                 return -ENOPROTOOPT;
 346
 347         /* XXX Assumes that size of ipt_entry is the same both in
 348          *     native and compat environments.
 349          */
 350         repl_nat_size = sizeof(*repl_nat) + origsize;
 351         repl_nat = compat_alloc_user_space(repl_nat_size);
 352
 353         ret = -EFAULT;
 354         if (put_user(origsize, &repl_nat->size))
 355                 goto out;
 356
 357         if (!access_ok(VERIFY_READ, urepl, optlen) ||
 358             !access_ok(VERIFY_WRITE, repl_nat, optlen))
 359                 goto out;
 360
 361         if (__copy_from_user(name, urepl->name, sizeof(urepl->name)) ||
 362             __copy_to_user(repl_nat->name, name, sizeof(repl_nat->name)))
 363                 goto out;
 364
 365         if (__get_user(tmp32, &urepl->valid_hooks) ||
 366             __put_user(tmp32, &repl_nat->valid_hooks))
 367                 goto out;
 368
 369         if (__get_user(tmp32, &urepl->num_entries) ||
 370             __put_user(tmp32, &repl_nat->num_entries))
 371                 goto out;
 372
 373         if (__get_user(num_counters, &urepl->num_counters) ||
 374             __put_user(num_counters, &repl_nat->num_counters))
 375                 goto out;
 376
 377         if (__get_user(ucntrs, &urepl->counters) ||
 378             __put_user(compat_ptr(ucntrs), &repl_nat->counters))
 379                 goto out;
 380
 381         if (__copy_in_user(&repl_nat->entries[0],
 382                            &urepl->entries[0],
 383                            origsize))
 384                 goto out;
 385
 386         for (i = 0; i < NF_IP_NUMHOOKS; i++) {
 387                 if (__get_user(tmp32, &urepl->hook_entry[i]) ||
 388                     __put_user(tmp32, &repl_nat->hook_entry[i]) ||
 389                     __get_user(tmp32, &urepl->underflow[i]) ||
 390                     __put_user(tmp32, &repl_nat->underflow[i]))
 391                         goto out;
 392         }
 393
 394         /*
 395          * Since struct ipt_counters just contains two u_int64_t members
 396          * we can just do the access_ok check here and pass the (converted)
 397          * pointer into the standard syscall.  We hope that the pointer is
 398          * not misaligned ...
 399          */
 400         if (!access_ok(VERIFY_WRITE, compat_ptr(ucntrs),
 401                        num_counters * sizeof(struct ipt_counters)))
 402                 goto out;
 403
 404
 405         ret = sys_setsockopt(fd, level, optname,
 406                              (char __user *)repl_nat, repl_nat_size);
 407
 408 out:
 409         return ret;
 410 }
 411
 412 /*
 413  * A struct sock_filter is architecture independent.
 414  */
 415 struct compat_sock_fprog {
 416         u16             len;
 417         compat_uptr_t   filter;         /* struct sock_filter * */
 418 };
 419
 420 static int do_set_attach_filter(int fd, int level, int optname,
 421                                 char __user *optval, int optlen)
 422 {
 423         struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
 424         struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
 425         compat_uptr_t ptr;
 426         u16 len;
 427
 428         if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) ||
 429             !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) ||
 430             __get_user(len, &fprog32->len) ||
 431             __get_user(ptr, &fprog32->filter) ||
 432             __put_user(len, &kfprog->len) ||
 433             __put_user(compat_ptr(ptr), &kfprog->filter))
 434                 return -EFAULT;
 435
 436         return sys_setsockopt(fd, level, optname, (char __user *)kfprog,
 437                               sizeof(struct sock_fprog));
 438 }
 439
 440 static int do_set_sock_timeout(int fd, int level, int optname, char __user *optval, int optlen)
 441 {
 442         struct compat_timeval __user *up = (struct compat_timeval __user *) optval;
 443         struct timeval ktime;
 444         mm_segment_t old_fs;
 445         int err;
 446
 447         if (optlen < sizeof(*up))
 448                 return -EINVAL;
 449         if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 450             __get_user(ktime.tv_sec, &up->tv_sec) ||
 451             __get_user(ktime.tv_usec, &up->tv_usec))
 452                 return -EFAULT;
 453         old_fs = get_fs();
 454         set_fs(KERNEL_DS);
 455         err = sys_setsockopt(fd, level, optname, (char *) &ktime, sizeof(ktime));
 456         set_fs(old_fs);
 457
 458         return err;
 459 }
 460
 461 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
 462                                 char __user *optval, int optlen)
 463 {
 464         /* SO_SET_REPLACE seems to be the same in all levels */
 465         if (optname == IPT_SO_SET_REPLACE)
 466                 return do_netfilter_replace(fd, level, optname,
 467                                             optval, optlen);
 468         if (level == SOL_SOCKET && optname == SO_ATTACH_FILTER)
 469                 return do_set_attach_filter(fd, level, optname,
 470                                             optval, optlen);
 471         if (level == SOL_SOCKET &&
 472             (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO))
 473                 return do_set_sock_timeout(fd, level, optname, optval, optlen);
 474
 475         return sys_setsockopt(fd, level, optname, optval, optlen);
 476 }
 477
 478 static int do_get_sock_timeout(int fd, int level, int optname,
 479                 char __user *optval, int __user *optlen)
 480 {
 481         struct compat_timeval __user *up;
 482         struct timeval ktime;
 483         mm_segment_t old_fs;
 484         int len, err;
 485
 486         up = (struct compat_timeval __user *) optval;
 487         if (get_user(len, optlen))
 488                 return -EFAULT;
 489         if (len < sizeof(*up))
 490                 return -EINVAL;
 491         len = sizeof(ktime);
 492         old_fs = get_fs();
 493         set_fs(KERNEL_DS);
 494         err = sys_getsockopt(fd, level, optname, (char *) &ktime, &len);
 495         set_fs(old_fs);
 496
 497         if (!err) {
 498                 if (put_user(sizeof(*up), optlen) ||
 499                     !access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
 500                     __put_user(ktime.tv_sec, &up->tv_sec) ||
 501                     __put_user(ktime.tv_usec, &up->tv_usec))
 502                         err = -EFAULT;
 503         }
 504         return err;
 505 }
 506
 507 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
 508                                 char __user *optval, int __user *optlen)
 509 {
 510         if (level == SOL_SOCKET &&
 511             (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO))
 512                 return do_get_sock_timeout(fd, level, optname, optval, optlen);
 513         return sys_getsockopt(fd, level, optname, optval, optlen);
 514 }
 515
 516 /* Argument list sizes for compat_sys_socketcall */
 517 #define AL(x) ((x) * sizeof(u32))
 518 static unsigned char nas[18]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
 519                                 AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
 520                                 AL(6),AL(2),AL(5),AL(5),AL(3),AL(3)};
 521 #undef AL
 522
 523 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags)
 524 {
 525         return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
 526 }
 527
 528 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
 529 {
 530         return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
 531 }
 532
 533 asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
 534 {
 535         int ret;
 536         u32 a[6];
 537         u32 a0, a1;
 538
 539         if (call < SYS_SOCKET || call > SYS_RECVMSG)
 540                 return -EINVAL;
 541         if (copy_from_user(a, args, nas[call]))
 542                 return -EFAULT;
 543         a0 = a[0];
 544         a1 = a[1];
 545
 546         switch(call) {
 547         case SYS_SOCKET:
 548                 ret = sys_socket(a0, a1, a[2]);
 549                 break;
 550         case SYS_BIND:
 551                 ret = sys_bind(a0, compat_ptr(a1), a[2]);
 552                 break;
 553         case SYS_CONNECT:
 554                 ret = sys_connect(a0, compat_ptr(a1), a[2]);
 555                 break;
 556         case SYS_LISTEN:
 557                 ret = sys_listen(a0, a1);
 558                 break;
 559         case SYS_ACCEPT:
 560                 ret = sys_accept(a0, compat_ptr(a1), compat_ptr(a[2]));
 561                 break;
 562         case SYS_GETSOCKNAME:
 563                 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
 564                 break;
 565         case SYS_GETPEERNAME:
 566                 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
 567                 break;
 568         case SYS_SOCKETPAIR:
 569                 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
 570                 break;
 571         case SYS_SEND:
 572                 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
 573                 break;
 574         case SYS_SENDTO:
 575                 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
 576                 break;
 577         case SYS_RECV:
 578                 ret = sys_recv(a0, compat_ptr(a1), a[2], a[3]);
 579                 break;
 580         case SYS_RECVFROM:
 581                 ret = sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), compat_ptr(a[5]));
 582                 break;
 583         case SYS_SHUTDOWN:
 584                 ret = sys_shutdown(a0,a1);
 585                 break;
 586         case SYS_SETSOCKOPT:
 587                 ret = compat_sys_setsockopt(a0, a1, a[2],
 588                                 compat_ptr(a[3]), a[4]);
 589                 break;
 590         case SYS_GETSOCKOPT:
 591                 ret = compat_sys_getsockopt(a0, a1, a[2],
 592                                 compat_ptr(a[3]), compat_ptr(a[4]));
 593                 break;
 594         case SYS_SENDMSG:
 595                 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
 596                 break;
 597         case SYS_RECVMSG:
 598                 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
 599                 break;
 600         default:
 601                 ret = -EINVAL;
 602                 break;
 603         }
 604         return ret;
 605 }