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/netfilter_ipv4/ip_tables.h> 24#include <linux/security.h> 25 26#include <net/scm.h> 27#include <net/sock.h> 28#include <asm/uaccess.h> 29#include <net/compat.h> 30 31static inline int iov_from_user_compat_to_kern(struct iovec *kiov, 32 struct compat_iovec __user *uiov32, 33 int niov) 34{ 35 int tot_len = 0; 36 37 while (niov > 0) { 38 compat_uptr_t buf; 39 compat_size_t len; 40 41 if (get_user(len, &uiov32->iov_len) || 42 get_user(buf, &uiov32->iov_base)) { 43 tot_len = -EFAULT; 44 break; 45 } 46 tot_len += len; 47 kiov->iov_base = compat_ptr(buf); 48 kiov->iov_len = (__kernel_size_t) len; 49 uiov32++; 50 kiov++; 51 niov--; 52 } 53 return tot_len; 54} 55 56int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg) 57{ 58 compat_uptr_t tmp1, tmp2, tmp3; 59 60 if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || 61 __get_user(tmp1, &umsg->msg_name) || 62 __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || 63 __get_user(tmp2, &umsg->msg_iov) || 64 __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) || 65 __get_user(tmp3, &umsg->msg_control) || 66 __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || 67 __get_user(kmsg->msg_flags, &umsg->msg_flags)) 68 return -EFAULT; 69 kmsg->msg_name = compat_ptr(tmp1); 70 kmsg->msg_iov = compat_ptr(tmp2); 71 kmsg->msg_control = compat_ptr(tmp3); 72 return 0; 73} 74 75/* I've named the args so it is easy to tell whose space the pointers are in. */ 76int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov, 77 char *kern_address, int mode) 78{ 79 int tot_len; 80 81 if (kern_msg->msg_namelen) { 82 if (mode==VERIFY_READ) { 83 int err = move_addr_to_kernel(kern_msg->msg_name, 84 kern_msg->msg_namelen, 85 kern_address); 86 if (err < 0) 87 return err; 88 } 89 kern_msg->msg_name = kern_address; 90 } else 91 kern_msg->msg_name = NULL; 92 93 tot_len = iov_from_user_compat_to_kern(kern_iov, 94 (struct compat_iovec __user *)kern_msg->msg_iov, 95 kern_msg->msg_iovlen); 96 if (tot_len >= 0) 97 kern_msg->msg_iov = kern_iov; 98 99 return tot_len; 100} 101 102/* Bleech... */ 103#define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) 104 105#define CMSG_COMPAT_DATA(cmsg) \ 106 ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)))) 107#define CMSG_COMPAT_SPACE(len) \ 108 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len)) 109#define CMSG_COMPAT_LEN(len) \ 110 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len)) 111 112#define CMSG_COMPAT_FIRSTHDR(msg) \ 113 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \ 114 (struct compat_cmsghdr __user *)((msg)->msg_control) : \ 115 (struct compat_cmsghdr __user *)NULL) 116 117#define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \ 118 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \ 119 (ucmlen) <= (unsigned long) \ 120 ((mhdr)->msg_controllen - \ 121 ((char *)(ucmsg) - (char *)(mhdr)->msg_control))) 122 123static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg, 124 struct compat_cmsghdr __user *cmsg, int cmsg_len) 125{ 126 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len); 127 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) > 128 msg->msg_controllen) 129 return NULL; 130 return (struct compat_cmsghdr __user *)ptr; 131} 132 133/* There is a lot of hair here because the alignment rules (and 134 * thus placement) of cmsg headers and length are different for 135 * 32-bit apps. -DaveM 136 */ 137int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, 138 unsigned char *stackbuf, int stackbuf_size) 139{ 140 struct compat_cmsghdr __user *ucmsg; 141 struct cmsghdr *kcmsg, *kcmsg_base; 142 compat_size_t ucmlen; 143 __kernel_size_t kcmlen, tmp; 144 int err = -EFAULT; 145 146 kcmlen = 0; 147 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; 148 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); 149 while (ucmsg != NULL) { 150 if (get_user(ucmlen, &ucmsg->cmsg_len)) 151 return -EFAULT; 152 153 /* Catch bogons. */ 154 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) 155 return -EINVAL; 156 157 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + 158 CMSG_ALIGN(sizeof(struct cmsghdr))); 159 tmp = CMSG_ALIGN(tmp); 160 kcmlen += tmp; 161 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); 162 } 163 if (kcmlen == 0) 164 return -EINVAL; 165 166 /* The kcmlen holds the 64-bit version of the control length. 167 * It may not be modified as we do not stick it into the kmsg 168 * until we have successfully copied over all of the data 169 * from the user. 170 */ 171 if (kcmlen > stackbuf_size) 172 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); 173 if (kcmsg == NULL) 174 return -ENOBUFS; 175 176 /* Now copy them over neatly. */ 177 memset(kcmsg, 0, kcmlen); 178 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); 179 while (ucmsg != NULL) { 180 if (__get_user(ucmlen, &ucmsg->cmsg_len)) 181 goto Efault; 182 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) 183 goto Einval; 184 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + 185 CMSG_ALIGN(sizeof(struct cmsghdr))); 186 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) 187 goto Einval; 188 kcmsg->cmsg_len = tmp; 189 tmp = CMSG_ALIGN(tmp); 190 if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) || 191 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) || 192 copy_from_user(CMSG_DATA(kcmsg), 193 CMSG_COMPAT_DATA(ucmsg), 194 (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))))) 195 goto Efault; 196 197 /* Advance. */ 198 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); 199 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); 200 } 201 202 /* Ok, looks like we made it. Hook it up and return success. */ 203 kmsg->msg_control = kcmsg_base; 204 kmsg->msg_controllen = kcmlen; 205 return 0; 206 207Einval: 208 err = -EINVAL; 209Efault: 210 if (kcmsg_base != (struct cmsghdr *)stackbuf) 211 sock_kfree_s(sk, kcmsg_base, kcmlen); 212 return err; 213} 214 215int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) 216{ 217 struct compat_timeval ctv; 218 struct compat_timespec cts; 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; 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(ctv); 234 } 235 if (level == SOL_SOCKET && type == SO_TIMESTAMPNS) { 236 struct timespec *ts = (struct timespec *)data; 237 cts.tv_sec = ts->tv_sec; 238 cts.tv_nsec = ts->tv_nsec; 239 data = &cts; 240 len = sizeof(cts); 241 } 242 243 cmlen = CMSG_COMPAT_LEN(len); 244 if (kmsg->msg_controllen < cmlen) { 245 kmsg->msg_flags |= MSG_CTRUNC; 246 cmlen = kmsg->msg_controllen; 247 } 248 cmhdr.cmsg_level = level; 249 cmhdr.cmsg_type = type; 250 cmhdr.cmsg_len = cmlen; 251 252 if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) 253 return -EFAULT; 254 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) 255 return -EFAULT; 256 cmlen = CMSG_COMPAT_SPACE(len); 257 kmsg->msg_control += cmlen; 258 kmsg->msg_controllen -= cmlen; 259 return 0; 260} 261 262void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) 263{ 264 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; 265 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); 266 int fdnum = scm->fp->count; 267 struct file **fp = scm->fp->fp; 268 int __user *cmfptr; 269 int err = 0, i; 270 271 if (fdnum < fdmax) 272 fdmax = fdnum; 273 274 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { 275 int new_fd; 276 err = security_file_receive(fp[i]); 277 if (err) 278 break; 279 err = get_unused_fd(); 280 if (err < 0) 281 break; 282 new_fd = err; 283 err = put_user(new_fd, cmfptr); 284 if (err) { 285 put_unused_fd(new_fd); 286 break; 287 } 288 /* Bump the usage count and install the file. */ 289 get_file(fp[i]); 290 fd_install(new_fd, fp[i]); 291 } 292 293 if (i > 0) { 294 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); 295 err = put_user(SOL_SOCKET, &cm->cmsg_level); 296 if (!err) 297 err = put_user(SCM_RIGHTS, &cm->cmsg_type); 298 if (!err) 299 err = put_user(cmlen, &cm->cmsg_len); 300 if (!err) { 301 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); 302 kmsg->msg_control += cmlen; 303 kmsg->msg_controllen -= cmlen; 304 } 305 } 306 if (i < fdnum) 307 kmsg->msg_flags |= MSG_CTRUNC; 308 309 /* 310 * All of the files that fit in the message have had their 311 * usage counts incremented, so we just free the list. 312 */ 313 __scm_destroy(scm); 314} 315 316struct compat_ipt_replace { 317 char name[IPT_TABLE_MAXNAMELEN]; 318 u32 valid_hooks; 319 u32 num_entries; 320 u32 size; 321 u32 hook_entry[NF_IP_NUMHOOKS]; 322 u32 underflow[NF_IP_NUMHOOKS]; 323 u32 num_counters; 324 compat_uptr_t counters; /* struct ipt_counters * */ 325 struct ipt_entry entries[0]; 326}; 327 328static int do_netfilter_replace(int fd, int level, int optname, 329 char __user *optval, int optlen) 330{ 331 struct compat_ipt_replace __user *urepl; 332 struct ipt_replace __user *repl_nat; 333 char name[IPT_TABLE_MAXNAMELEN]; 334 u32 origsize, tmp32, num_counters; 335 unsigned int repl_nat_size; 336 int ret; 337 int i; 338 compat_uptr_t ucntrs; 339 340 urepl = (struct compat_ipt_replace __user *)optval; 341 if (get_user(origsize, &urepl->size)) 342 return -EFAULT; 343 344 /* Hack: Causes ipchains to give correct error msg --RR */ 345 if (optlen != sizeof(*urepl) + origsize) 346 return -ENOPROTOOPT; 347 348 repl_nat_size = sizeof(*repl_nat) + origsize; 349 repl_nat = compat_alloc_user_space(repl_nat_size); 350 351 ret = -EFAULT; 352 if (put_user(origsize, &repl_nat->size)) 353 goto out; 354 355 if (!access_ok(VERIFY_READ, urepl, optlen) || 356 !access_ok(VERIFY_WRITE, repl_nat, optlen)) 357 goto out; 358 359 if (__copy_from_user(name, urepl->name, sizeof(urepl->name)) || 360 __copy_to_user(repl_nat->name, name, sizeof(repl_nat->name))) 361 goto out; 362 363 if (__get_user(tmp32, &urepl->valid_hooks) || 364 __put_user(tmp32, &repl_nat->valid_hooks)) 365 goto out; 366 367 if (__get_user(tmp32, &urepl->num_entries) || 368 __put_user(tmp32, &repl_nat->num_entries)) 369 goto out; 370 371 if (__get_user(num_counters, &urepl->num_counters) || 372 __put_user(num_counters, &repl_nat->num_counters)) 373 goto out; 374 375 if (__get_user(ucntrs, &urepl->counters) || 376 __put_user(compat_ptr(ucntrs), &repl_nat->counters)) 377 goto out; 378 379 if (__copy_in_user(&repl_nat->entries[0], 380 &urepl->entries[0], 381 origsize)) 382 goto out; 383 384 for (i = 0; i < NF_IP_NUMHOOKS; i++) { 385 if (__get_user(tmp32, &urepl->hook_entry[i]) || 386 __put_user(tmp32, &repl_nat->hook_entry[i]) || 387 __get_user(tmp32, &urepl->underflow[i]) || 388 __put_user(tmp32, &repl_nat->underflow[i])) 389 goto out; 390 } 391 392 /* 393 * Since struct ipt_counters just contains two u_int64_t members 394 * we can just do the access_ok check here and pass the (converted) 395 * pointer into the standard syscall. We hope that the pointer is 396 * not misaligned ... 397 */ 398 if (!access_ok(VERIFY_WRITE, compat_ptr(ucntrs), 399 num_counters * sizeof(struct ipt_counters))) 400 goto out; 401 402 403 ret = sys_setsockopt(fd, level, optname, 404 (char __user *)repl_nat, repl_nat_size); 405 406out: 407 return ret; 408} 409 410/* 411 * A struct sock_filter is architecture independent. 412 */ 413struct compat_sock_fprog { 414 u16 len; 415 compat_uptr_t filter; /* struct sock_filter * */ 416}; 417 418static int do_set_attach_filter(struct socket *sock, int level, int optname, 419 char __user *optval, int optlen) 420{ 421 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; 422 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); 423 compat_uptr_t ptr; 424 u16 len; 425 426 if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) || 427 !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) || 428 __get_user(len, &fprog32->len) || 429 __get_user(ptr, &fprog32->filter) || 430 __put_user(len, &kfprog->len) || 431 __put_user(compat_ptr(ptr), &kfprog->filter)) 432 return -EFAULT; 433 434 return sock_setsockopt(sock, level, optname, (char __user *)kfprog, 435 sizeof(struct sock_fprog)); 436} 437 438static int do_set_sock_timeout(struct socket *sock, int level, 439 int optname, char __user *optval, int optlen) 440{ 441 struct compat_timeval __user *up = (struct compat_timeval __user *) optval; 442 struct timeval ktime; 443 mm_segment_t old_fs; 444 int err; 445 446 if (optlen < sizeof(*up)) 447 return -EINVAL; 448 if (!access_ok(VERIFY_READ, up, sizeof(*up)) || 449 __get_user(ktime.tv_sec, &up->tv_sec) || 450 __get_user(ktime.tv_usec, &up->tv_usec)) 451 return -EFAULT; 452 old_fs = get_fs(); 453 set_fs(KERNEL_DS); 454 err = sock_setsockopt(sock, level, optname, (char *) &ktime, sizeof(ktime)); 455 set_fs(old_fs); 456 457 return err; 458} 459 460static int compat_sock_setsockopt(struct socket *sock, int level, int optname, 461 char __user *optval, int optlen) 462{ 463 if (optname == SO_ATTACH_FILTER) 464 return do_set_attach_filter(sock, level, optname, 465 optval, optlen); 466 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) 467 return do_set_sock_timeout(sock, level, optname, optval, optlen); 468 469 return sock_setsockopt(sock, level, optname, optval, optlen); 470} 471 472asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, 473 char __user *optval, int optlen) 474{ 475 int err; 476 struct socket *sock; 477 478 if (level == SOL_IPV6 && optname == IPT_SO_SET_REPLACE) 479 return do_netfilter_replace(fd, level, optname, 480 optval, optlen); 481 482 if (optlen < 0) 483 return -EINVAL; 484 485 if ((sock = sockfd_lookup(fd, &err))!=NULL) 486 { 487 err = security_socket_setsockopt(sock,level,optname); 488 if (err) { 489 sockfd_put(sock); 490 return err; 491 } 492 493 if (level == SOL_SOCKET) 494 err = compat_sock_setsockopt(sock, level, 495 optname, optval, optlen); 496 else if (sock->ops->compat_setsockopt) 497 err = sock->ops->compat_setsockopt(sock, level, 498 optname, optval, optlen); 499 else 500 err = sock->ops->setsockopt(sock, level, 501 optname, optval, optlen); 502 sockfd_put(sock); 503 } 504 return err; 505} 506 507static int do_get_sock_timeout(struct socket *sock, int level, int optname, 508 char __user *optval, int __user *optlen) 509{ 510 struct compat_timeval __user *up; 511 struct timeval ktime; 512 mm_segment_t old_fs; 513 int len, err; 514 515 up = (struct compat_timeval __user *) optval; 516 if (get_user(len, optlen)) 517 return -EFAULT; 518 if (len < sizeof(*up)) 519 return -EINVAL; 520 len = sizeof(ktime); 521 old_fs = get_fs(); 522 set_fs(KERNEL_DS); 523 err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); 524 set_fs(old_fs); 525 526 if (!err) { 527 if (put_user(sizeof(*up), optlen) || 528 !access_ok(VERIFY_WRITE, up, sizeof(*up)) || 529 __put_user(ktime.tv_sec, &up->tv_sec) || 530 __put_user(ktime.tv_usec, &up->tv_usec)) 531 err = -EFAULT; 532 } 533 return err; 534} 535 536static int compat_sock_getsockopt(struct socket *sock, int level, int optname, 537 char __user *optval, int __user *optlen) 538{ 539 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) 540 return do_get_sock_timeout(sock, level, optname, optval, optlen); 541 return sock_getsockopt(sock, level, optname, optval, optlen); 542} 543 544int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) 545{ 546 struct compat_timeval __user *ctv = 547 (struct compat_timeval __user*) userstamp; 548 int err = -ENOENT; 549 struct timeval tv; 550 551 if (!sock_flag(sk, SOCK_TIMESTAMP)) 552 sock_enable_timestamp(sk); 553 tv = ktime_to_timeval(sk->sk_stamp); 554 if (tv.tv_sec == -1) 555 return err; 556 if (tv.tv_sec == 0) { 557 sk->sk_stamp = ktime_get_real(); 558 tv = ktime_to_timeval(sk->sk_stamp); 559 } 560 err = 0; 561 if (put_user(tv.tv_sec, &ctv->tv_sec) || 562 put_user(tv.tv_usec, &ctv->tv_usec)) 563 err = -EFAULT; 564 return err; 565} 566EXPORT_SYMBOL(compat_sock_get_timestamp); 567 568int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) 569{ 570 struct compat_timespec __user *ctv = 571 (struct compat_timespec __user*) userstamp; 572 int err = -ENOENT; 573 struct timespec ts; 574 575 if (!sock_flag(sk, SOCK_TIMESTAMP)) 576 sock_enable_timestamp(sk); 577 ts = ktime_to_timespec(sk->sk_stamp); 578 if (ts.tv_sec == -1) 579 return err; 580 if (ts.tv_sec == 0) { 581 sk->sk_stamp = ktime_get_real(); 582 ts = ktime_to_timespec(sk->sk_stamp); 583 } 584 err = 0; 585 if (put_user(ts.tv_sec, &ctv->tv_sec) || 586 put_user(ts.tv_nsec, &ctv->tv_nsec)) 587 err = -EFAULT; 588 return err; 589} 590EXPORT_SYMBOL(compat_sock_get_timestampns); 591 592asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, 593 char __user *optval, int __user *optlen) 594{ 595 int err; 596 struct socket *sock; 597 598 if ((sock = sockfd_lookup(fd, &err))!=NULL) 599 { 600 err = security_socket_getsockopt(sock, level, 601 optname); 602 if (err) { 603 sockfd_put(sock); 604 return err; 605 } 606 607 if (level == SOL_SOCKET) 608 err = compat_sock_getsockopt(sock, level, 609 optname, optval, optlen); 610 else if (sock->ops->compat_getsockopt) 611 err = sock->ops->compat_getsockopt(sock, level, 612 optname, optval, optlen); 613 else 614 err = sock->ops->getsockopt(sock, level, 615 optname, optval, optlen); 616 sockfd_put(sock); 617 } 618 return err; 619} 620/* Argument list sizes for compat_sys_socketcall */ 621#define AL(x) ((x) * sizeof(u32)) 622static unsigned char nas[18]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3), 623 AL(3),AL(3),AL(4),AL(4),AL(4),AL(6), 624 AL(6),AL(2),AL(5),AL(5),AL(3),AL(3)}; 625#undef AL 626 627asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags) 628{ 629 return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); 630} 631 632asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags) 633{ 634 return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); 635} 636 637asmlinkage long compat_sys_socketcall(int call, u32 __user *args) 638{ 639 int ret; 640 u32 a[6]; 641 u32 a0, a1; 642 643 if (call < SYS_SOCKET || call > SYS_RECVMSG) 644 return -EINVAL; 645 if (copy_from_user(a, args, nas[call])) 646 return -EFAULT; 647 a0 = a[0]; 648 a1 = a[1]; 649 650 switch (call) { 651 case SYS_SOCKET: 652 ret = sys_socket(a0, a1, a[2]); 653 break; 654 case SYS_BIND: 655 ret = sys_bind(a0, compat_ptr(a1), a[2]); 656 break; 657 case SYS_CONNECT: 658 ret = sys_connect(a0, compat_ptr(a1), a[2]); 659 break; 660 case SYS_LISTEN: 661 ret = sys_listen(a0, a1); 662 break; 663 case SYS_ACCEPT: 664 ret = sys_accept(a0, compat_ptr(a1), compat_ptr(a[2])); 665 break; 666 case SYS_GETSOCKNAME: 667 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); 668 break; 669 case SYS_GETPEERNAME: 670 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); 671 break; 672 case SYS_SOCKETPAIR: 673 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); 674 break; 675 case SYS_SEND: 676 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]); 677 break; 678 case SYS_SENDTO: 679 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); 680 break; 681 case SYS_RECV: 682 ret = sys_recv(a0, compat_ptr(a1), a[2], a[3]); 683 break; 684 case SYS_RECVFROM: 685 ret = sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), compat_ptr(a[5])); 686 break; 687 case SYS_SHUTDOWN: 688 ret = sys_shutdown(a0,a1); 689 break; 690 case SYS_SETSOCKOPT: 691 ret = compat_sys_setsockopt(a0, a1, a[2], 692 compat_ptr(a[3]), a[4]); 693 break; 694 case SYS_GETSOCKOPT: 695 ret = compat_sys_getsockopt(a0, a1, a[2], 696 compat_ptr(a[3]), compat_ptr(a[4])); 697 break; 698 case SYS_SENDMSG: 699 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); 700 break; 701 case SYS_RECVMSG: 702 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); 703 break; 704 default: 705 ret = -EINVAL; 706 break; 707 } 708 return ret; 709} 710