1 /* 2 * 32bit Socket syscall emulation. Based on arch/sparc64/kernel/sys_sparc32.c. 3 * 4 * Copyright (C) 2000 VA Linux Co 5 * Copyright (C) 2000 Don Dugger <n0ano@valinux.com> 6 * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com> 7 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) 8 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) 9 * Copyright (C) 2000 Hewlett-Packard Co. 10 * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com> 11 * Copyright (C) 2000,2001 Andi Kleen, SuSE Labs 12 */ 13 14 #include <linux/kernel.h> 15 #include <linux/fs.h> 16 #include <linux/sched.h> 17 #include <linux/types.h> 18 #include <linux/file.h> 19 #include <linux/icmpv6.h> 20 #include <linux/socket.h> 21 #include <linux/syscalls.h> 22 #include <linux/filter.h> 23 #include <linux/compat.h> 24 #include <linux/netfilter_ipv4/ip_tables.h> 25 #include <linux/security.h> 26 27 #include <net/scm.h> 28 #include <net/sock.h> 29 #include <asm/uaccess.h> 30 #include <net/compat.h> 31 32 static inline int iov_from_user_compat_to_kern(struct iovec *kiov, 33 struct compat_iovec __user *uiov32, 34 int niov) 35 { 36 int tot_len = 0; 37 38 while(niov > 0) { 39 compat_uptr_t buf; 40 compat_size_t len; 41 42 if(get_user(len, &uiov32->iov_len) || 43 get_user(buf, &uiov32->iov_base)) { 44 tot_len = -EFAULT; 45 break; 46 } 47 tot_len += len; 48 kiov->iov_base = compat_ptr(buf); 49 kiov->iov_len = (__kernel_size_t) len; 50 uiov32++; 51 kiov++; 52 niov--; 53 } 54 return tot_len; 55 } 56 57 int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg) 58 { 59 compat_uptr_t tmp1, tmp2, tmp3; 60 61 if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || 62 __get_user(tmp1, &umsg->msg_name) || 63 __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || 64 __get_user(tmp2, &umsg->msg_iov) || 65 __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) || 66 __get_user(tmp3, &umsg->msg_control) || 67 __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || 68 __get_user(kmsg->msg_flags, &umsg->msg_flags)) 69 return -EFAULT; 70 kmsg->msg_name = compat_ptr(tmp1); 71 kmsg->msg_iov = compat_ptr(tmp2); 72 kmsg->msg_control = compat_ptr(tmp3); 73 return 0; 74 } 75 76 /* I've named the args so it is easy to tell whose space the pointers are in. */ 77 int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov, 78 char *kern_address, int mode) 79 { 80 int tot_len; 81 82 if(kern_msg->msg_namelen) { 83 if(mode==VERIFY_READ) { 84 int err = move_addr_to_kernel(kern_msg->msg_name, 85 kern_msg->msg_namelen, 86 kern_address); 87 if(err < 0) 88 return err; 89 } 90 kern_msg->msg_name = kern_address; 91 } else 92 kern_msg->msg_name = NULL; 93 94 tot_len = iov_from_user_compat_to_kern(kern_iov, 95 (struct compat_iovec __user *)kern_msg->msg_iov, 96 kern_msg->msg_iovlen); 97 if(tot_len >= 0) 98 kern_msg->msg_iov = kern_iov; 99 100 return tot_len; 101 } 102 103 /* Bleech... */ 104 #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) 105 106 #define CMSG_COMPAT_DATA(cmsg) \ 107 ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)))) 108 #define CMSG_COMPAT_SPACE(len) \ 109 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len)) 110 #define CMSG_COMPAT_LEN(len) \ 111 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len)) 112 113 #define CMSG_COMPAT_FIRSTHDR(msg) \ 114 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \ 115 (struct compat_cmsghdr __user *)((msg)->msg_control) : \ 116 (struct compat_cmsghdr __user *)NULL) 117 118 #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \ 119 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \ 120 (ucmlen) <= (unsigned long) \ 121 ((mhdr)->msg_controllen - \ 122 ((char *)(ucmsg) - (char *)(mhdr)->msg_control))) 123 124 static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg, 125 struct compat_cmsghdr __user *cmsg, int cmsg_len) 126 { 127 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len); 128 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) > 129 msg->msg_controllen) 130 return NULL; 131 return (struct compat_cmsghdr __user *)ptr; 132 } 133 134 /* There is a lot of hair here because the alignment rules (and 135 * thus placement) of cmsg headers and length are different for 136 * 32-bit apps. -DaveM 137 */ 138 int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, 139 unsigned char *stackbuf, int stackbuf_size) 140 { 141 struct compat_cmsghdr __user *ucmsg; 142 struct cmsghdr *kcmsg, *kcmsg_base; 143 compat_size_t ucmlen; 144 __kernel_size_t kcmlen, tmp; 145 int err = -EFAULT; 146 147 kcmlen = 0; 148 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; 149 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); 150 while(ucmsg != NULL) { 151 if(get_user(ucmlen, &ucmsg->cmsg_len)) 152 return -EFAULT; 153 154 /* Catch bogons. */ 155 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) 156 return -EINVAL; 157 158 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + 159 CMSG_ALIGN(sizeof(struct cmsghdr))); 160 tmp = CMSG_ALIGN(tmp); 161 kcmlen += tmp; 162 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); 163 } 164 if(kcmlen == 0) 165 return -EINVAL; 166 167 /* The kcmlen holds the 64-bit version of the control length. 168 * It may not be modified as we do not stick it into the kmsg 169 * until we have successfully copied over all of the data 170 * from the user. 171 */ 172 if (kcmlen > stackbuf_size) 173 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); 174 if (kcmsg == NULL) 175 return -ENOBUFS; 176 177 /* Now copy them over neatly. */ 178 memset(kcmsg, 0, kcmlen); 179 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); 180 while(ucmsg != NULL) { 181 if (__get_user(ucmlen, &ucmsg->cmsg_len)) 182 goto Efault; 183 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) 184 goto Einval; 185 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + 186 CMSG_ALIGN(sizeof(struct cmsghdr))); 187 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) 188 goto Einval; 189 kcmsg->cmsg_len = tmp; 190 tmp = CMSG_ALIGN(tmp); 191 if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) || 192 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) || 193 copy_from_user(CMSG_DATA(kcmsg), 194 CMSG_COMPAT_DATA(ucmsg), 195 (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))))) 196 goto Efault; 197 198 /* Advance. */ 199 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); 200 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); 201 } 202 203 /* Ok, looks like we made it. Hook it up and return success. */ 204 kmsg->msg_control = kcmsg_base; 205 kmsg->msg_controllen = kcmlen; 206 return 0; 207 208 Einval: 209 err = -EINVAL; 210 Efault: 211 if (kcmsg_base != (struct cmsghdr *)stackbuf) 212 sock_kfree_s(sk, kcmsg_base, kcmlen); 213 return err; 214 } 215 216 int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) 217 { 218 struct compat_timeval ctv; 219 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; 220 struct compat_cmsghdr cmhdr; 221 int cmlen; 222 223 if(cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { 224 kmsg->msg_flags |= MSG_CTRUNC; 225 return 0; /* XXX: return error? check spec. */ 226 } 227 228 if (level == SOL_SOCKET && type == SO_TIMESTAMP) { 229 struct timeval *tv = (struct timeval *)data; 230 ctv.tv_sec = tv->tv_sec; 231 ctv.tv_usec = tv->tv_usec; 232 data = &ctv; 233 len = sizeof(struct compat_timeval); 234 } 235 236 cmlen = CMSG_COMPAT_LEN(len); 237 if(kmsg->msg_controllen < cmlen) { 238 kmsg->msg_flags |= MSG_CTRUNC; 239 cmlen = kmsg->msg_controllen; 240 } 241 cmhdr.cmsg_level = level; 242 cmhdr.cmsg_type = type; 243 cmhdr.cmsg_len = cmlen; 244 245 if(copy_to_user(cm, &cmhdr, sizeof cmhdr)) 246 return -EFAULT; 247 if(copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) 248 return -EFAULT; 249 cmlen = CMSG_COMPAT_SPACE(len); 250 kmsg->msg_control += cmlen; 251 kmsg->msg_controllen -= cmlen; 252 return 0; 253 } 254 255 void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) 256 { 257 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; 258 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); 259 int fdnum = scm->fp->count; 260 struct file **fp = scm->fp->fp; 261 int __user *cmfptr; 262 int err = 0, i; 263 264 if (fdnum < fdmax) 265 fdmax = fdnum; 266 267 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { 268 int new_fd; 269 err = security_file_receive(fp[i]); 270 if (err) 271 break; 272 err = get_unused_fd(); 273 if (err < 0) 274 break; 275 new_fd = err; 276 err = put_user(new_fd, cmfptr); 277 if (err) { 278 put_unused_fd(new_fd); 279 break; 280 } 281 /* Bump the usage count and install the file. */ 282 get_file(fp[i]); 283 fd_install(new_fd, fp[i]); 284 } 285 286 if (i > 0) { 287 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); 288 if (!err) 289 err = put_user(SOL_SOCKET, &cm->cmsg_level); 290 if (!err) 291 err = put_user(SCM_RIGHTS, &cm->cmsg_type); 292 if (!err) 293 err = put_user(cmlen, &cm->cmsg_len); 294 if (!err) { 295 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); 296 kmsg->msg_control += cmlen; 297 kmsg->msg_controllen -= cmlen; 298 } 299 } 300 if (i < fdnum) 301 kmsg->msg_flags |= MSG_CTRUNC; 302 303 /* 304 * All of the files that fit in the message have had their 305 * usage counts incremented, so we just free the list. 306 */ 307 __scm_destroy(scm); 308 } 309 310 /* 311 * For now, we assume that the compatibility and native version 312 * of struct ipt_entry are the same - sfr. FIXME 313 */ 314 struct compat_ipt_replace { 315 char name[IPT_TABLE_MAXNAMELEN]; 316 u32 valid_hooks; 317 u32 num_entries; 318 u32 size; 319 u32 hook_entry[NF_IP_NUMHOOKS]; 320 u32 underflow[NF_IP_NUMHOOKS]; 321 u32 num_counters; 322 compat_uptr_t counters; /* struct ipt_counters * */ 323 struct ipt_entry entries[0]; 324 }; 325 326 static int do_netfilter_replace(int fd, int level, int optname, 327 char __user *optval, int optlen) 328 { 329 struct compat_ipt_replace __user *urepl; 330 struct ipt_replace __user *repl_nat; 331 char name[IPT_TABLE_MAXNAMELEN]; 332 u32 origsize, tmp32, num_counters; 333 unsigned int repl_nat_size; 334 int ret; 335 int i; 336 compat_uptr_t ucntrs; 337 338 urepl = (struct compat_ipt_replace __user *)optval; 339 if (get_user(origsize, &urepl->size)) 340 return -EFAULT; 341 342 /* Hack: Causes ipchains to give correct error msg --RR */ 343 if (optlen != sizeof(*urepl) + origsize) 344 return -ENOPROTOOPT; 345 346 /* XXX Assumes that size of ipt_entry is the same both in 347 * native and compat environments. 348 */ 349 repl_nat_size = sizeof(*repl_nat) + origsize; 350 repl_nat = compat_alloc_user_space(repl_nat_size); 351 352 ret = -EFAULT; 353 if (put_user(origsize, &repl_nat->size)) 354 goto out; 355 356 if (!access_ok(VERIFY_READ, urepl, optlen) || 357 !access_ok(VERIFY_WRITE, repl_nat, optlen)) 358 goto out; 359 360 if (__copy_from_user(name, urepl->name, sizeof(urepl->name)) || 361 __copy_to_user(repl_nat->name, name, sizeof(repl_nat->name))) 362 goto out; 363 364 if (__get_user(tmp32, &urepl->valid_hooks) || 365 __put_user(tmp32, &repl_nat->valid_hooks)) 366 goto out; 367 368 if (__get_user(tmp32, &urepl->num_entries) || 369 __put_user(tmp32, &repl_nat->num_entries)) 370 goto out; 371 372 if (__get_user(num_counters, &urepl->num_counters) || 373 __put_user(num_counters, &repl_nat->num_counters)) 374 goto out; 375 376 if (__get_user(ucntrs, &urepl->counters) || 377 __put_user(compat_ptr(ucntrs), &repl_nat->counters)) 378 goto out; 379 380 if (__copy_in_user(&repl_nat->entries[0], 381 &urepl->entries[0], 382 origsize)) 383 goto out; 384 385 for (i = 0; i < NF_IP_NUMHOOKS; i++) { 386 if (__get_user(tmp32, &urepl->hook_entry[i]) || 387 __put_user(tmp32, &repl_nat->hook_entry[i]) || 388 __get_user(tmp32, &urepl->underflow[i]) || 389 __put_user(tmp32, &repl_nat->underflow[i])) 390 goto out; 391 } 392 393 /* 394 * Since struct ipt_counters just contains two u_int64_t members 395 * we can just do the access_ok check here and pass the (converted) 396 * pointer into the standard syscall. We hope that the pointer is 397 * not misaligned ... 398 */ 399 if (!access_ok(VERIFY_WRITE, compat_ptr(ucntrs), 400 num_counters * sizeof(struct ipt_counters))) 401 goto out; 402 403 404 ret = sys_setsockopt(fd, level, optname, 405 (char __user *)repl_nat, repl_nat_size); 406 407 out: 408 return ret; 409 } 410 411 /* 412 * A struct sock_filter is architecture independent. 413 */ 414 struct compat_sock_fprog { 415 u16 len; 416 compat_uptr_t filter; /* struct sock_filter * */ 417 }; 418 419 static int do_set_attach_filter(struct socket *sock, int level, int optname, 420 char __user *optval, int optlen) 421 { 422 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; 423 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); 424 compat_uptr_t ptr; 425 u16 len; 426 427 if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) || 428 !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) || 429 __get_user(len, &fprog32->len) || 430 __get_user(ptr, &fprog32->filter) || 431 __put_user(len, &kfprog->len) || 432 __put_user(compat_ptr(ptr), &kfprog->filter)) 433 return -EFAULT; 434 435 return sock_setsockopt(sock, level, optname, (char __user *)kfprog, 436 sizeof(struct sock_fprog)); 437 } 438 439 static int do_set_sock_timeout(struct socket *sock, int level, 440 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 = sock_setsockopt(sock, level, optname, (char *) &ktime, sizeof(ktime)); 456 set_fs(old_fs); 457 458 return err; 459 } 460 461 static int compat_sock_setsockopt(struct socket *sock, int level, int optname, 462 char __user *optval, int optlen) 463 { 464 if (optname == SO_ATTACH_FILTER) 465 return do_set_attach_filter(sock, level, optname, 466 optval, optlen); 467 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) 468 return do_set_sock_timeout(sock, level, optname, optval, optlen); 469 470 return sock_setsockopt(sock, level, optname, optval, optlen); 471 } 472 473 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, 474 char __user *optval, int optlen) 475 { 476 int err; 477 struct socket *sock; 478 479 if (level == SOL_IPV6 && optname == IPT_SO_SET_REPLACE) 480 return do_netfilter_replace(fd, level, optname, 481 optval, optlen); 482 483 if (optlen < 0) 484 return -EINVAL; 485 486 if ((sock = sockfd_lookup(fd, &err))!=NULL) 487 { 488 err = security_socket_setsockopt(sock,level,optname); 489 if (err) { 490 sockfd_put(sock); 491 return err; 492 } 493 494 if (level == SOL_SOCKET) 495 err = compat_sock_setsockopt(sock, level, 496 optname, optval, optlen); 497 else if (sock->ops->compat_setsockopt) 498 err = sock->ops->compat_setsockopt(sock, level, 499 optname, optval, optlen); 500 else 501 err = sock->ops->setsockopt(sock, level, 502 optname, optval, optlen); 503 sockfd_put(sock); 504 } 505 return err; 506 } 507 508 static int do_get_sock_timeout(struct socket *sock, int level, int optname, 509 char __user *optval, int __user *optlen) 510 { 511 struct compat_timeval __user *up; 512 struct timeval ktime; 513 mm_segment_t old_fs; 514 int len, err; 515 516 up = (struct compat_timeval __user *) optval; 517 if (get_user(len, optlen)) 518 return -EFAULT; 519 if (len < sizeof(*up)) 520 return -EINVAL; 521 len = sizeof(ktime); 522 old_fs = get_fs(); 523 set_fs(KERNEL_DS); 524 err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); 525 set_fs(old_fs); 526 527 if (!err) { 528 if (put_user(sizeof(*up), optlen) || 529 !access_ok(VERIFY_WRITE, up, sizeof(*up)) || 530 __put_user(ktime.tv_sec, &up->tv_sec) || 531 __put_user(ktime.tv_usec, &up->tv_usec)) 532 err = -EFAULT; 533 } 534 return err; 535 } 536 537 static int compat_sock_getsockopt(struct socket *sock, int level, int optname, 538 char __user *optval, int __user *optlen) 539 { 540 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) 541 return do_get_sock_timeout(sock, level, optname, optval, optlen); 542 return sock_getsockopt(sock, level, optname, optval, optlen); 543 } 544 545 int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) 546 { 547 struct compat_timeval __user *ctv = 548 (struct compat_timeval __user*) userstamp; 549 int err = -ENOENT; 550 551 if (!sock_flag(sk, SOCK_TIMESTAMP)) 552 sock_enable_timestamp(sk); 553 if (sk->sk_stamp.tv_sec == -1) 554 return err; 555 if (sk->sk_stamp.tv_sec == 0) 556 do_gettimeofday(&sk->sk_stamp); 557 if (put_user(sk->sk_stamp.tv_sec, &ctv->tv_sec) || 558 put_user(sk->sk_stamp.tv_usec, &ctv->tv_usec)) 559 err = -EFAULT; 560 return err; 561 } 562 EXPORT_SYMBOL(compat_sock_get_timestamp); 563 564 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, 565 char __user *optval, int __user *optlen) 566 { 567 int err; 568 struct socket *sock; 569 570 if ((sock = sockfd_lookup(fd, &err))!=NULL) 571 { 572 err = security_socket_getsockopt(sock, level, 573 optname); 574 if (err) { 575 sockfd_put(sock); 576 return err; 577 } 578 579 if (level == SOL_SOCKET) 580 err = compat_sock_getsockopt(sock, level, 581 optname, optval, optlen); 582 else if (sock->ops->compat_getsockopt) 583 err = sock->ops->compat_getsockopt(sock, level, 584 optname, optval, optlen); 585 else 586 err = sock->ops->getsockopt(sock, level, 587 optname, optval, optlen); 588 sockfd_put(sock); 589 } 590 return err; 591 } 592 /* Argument list sizes for compat_sys_socketcall */ 593 #define AL(x) ((x) * sizeof(u32)) 594 static unsigned char nas[18]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3), 595 AL(3),AL(3),AL(4),AL(4),AL(4),AL(6), 596 AL(6),AL(2),AL(5),AL(5),AL(3),AL(3)}; 597 #undef AL 598 599 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags) 600 { 601 return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); 602 } 603 604 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags) 605 { 606 return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); 607 } 608 609 asmlinkage long compat_sys_socketcall(int call, u32 __user *args) 610 { 611 int ret; 612 u32 a[6]; 613 u32 a0, a1; 614 615 if (call < SYS_SOCKET || call > SYS_RECVMSG) 616 return -EINVAL; 617 if (copy_from_user(a, args, nas[call])) 618 return -EFAULT; 619 a0 = a[0]; 620 a1 = a[1]; 621 622 switch(call) { 623 case SYS_SOCKET: 624 ret = sys_socket(a0, a1, a[2]); 625 break; 626 case SYS_BIND: 627 ret = sys_bind(a0, compat_ptr(a1), a[2]); 628 break; 629 case SYS_CONNECT: 630 ret = sys_connect(a0, compat_ptr(a1), a[2]); 631 break; 632 case SYS_LISTEN: 633 ret = sys_listen(a0, a1); 634 break; 635 case SYS_ACCEPT: 636 ret = sys_accept(a0, compat_ptr(a1), compat_ptr(a[2])); 637 break; 638 case SYS_GETSOCKNAME: 639 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); 640 break; 641 case SYS_GETPEERNAME: 642 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); 643 break; 644 case SYS_SOCKETPAIR: 645 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); 646 break; 647 case SYS_SEND: 648 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]); 649 break; 650 case SYS_SENDTO: 651 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); 652 break; 653 case SYS_RECV: 654 ret = sys_recv(a0, compat_ptr(a1), a[2], a[3]); 655 break; 656 case SYS_RECVFROM: 657 ret = sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), compat_ptr(a[5])); 658 break; 659 case SYS_SHUTDOWN: 660 ret = sys_shutdown(a0,a1); 661 break; 662 case SYS_SETSOCKOPT: 663 ret = compat_sys_setsockopt(a0, a1, a[2], 664 compat_ptr(a[3]), a[4]); 665 break; 666 case SYS_GETSOCKOPT: 667 ret = compat_sys_getsockopt(a0, a1, a[2], 668 compat_ptr(a[3]), compat_ptr(a[4])); 669 break; 670 case SYS_SENDMSG: 671 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); 672 break; 673 case SYS_RECVMSG: 674 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); 675 break; 676 default: 677 ret = -EINVAL; 678 break; 679 } 680 return ret; 681 } 682