2 * 32bit Socket syscall emulation. Based on arch/sparc64/kernel/sys_sparc32.c.
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
14 #include <linux/kernel.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>
27 #include <asm/uaccess.h>
28 #include <net/compat.h>
30 static inline int iov_from_user_compat_to_kern(struct iovec *kiov,
31 struct compat_iovec __user *uiov32,
40 if (get_user(len, &uiov32->iov_len) ||
41 get_user(buf, &uiov32->iov_base)) {
46 kiov->iov_base = compat_ptr(buf);
47 kiov->iov_len = (__kernel_size_t) len;
55 int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg)
57 compat_uptr_t tmp1, tmp2, tmp3;
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))
68 kmsg->msg_name = compat_ptr(tmp1);
69 kmsg->msg_iov = compat_ptr(tmp2);
70 kmsg->msg_control = compat_ptr(tmp3);
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)
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,
88 kern_msg->msg_name = kern_address;
90 kern_msg->msg_name = NULL;
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);
96 kern_msg->msg_iov = kern_iov;
102 #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32))
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))
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)
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)))
122 static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
123 struct compat_cmsghdr __user *cmsg, int cmsg_len)
125 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
126 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
129 return (struct compat_cmsghdr __user *)ptr;
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
136 int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
137 unsigned char *stackbuf, int stackbuf_size)
139 struct compat_cmsghdr __user *ucmsg;
140 struct cmsghdr *kcmsg, *kcmsg_base;
141 compat_size_t ucmlen;
142 __kernel_size_t kcmlen, tmp;
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))
153 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
156 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
157 CMSG_ALIGN(sizeof(struct cmsghdr)));
158 tmp = CMSG_ALIGN(tmp);
160 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
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
170 if (kcmlen > stackbuf_size)
171 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
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))
181 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
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))
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)))))
197 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
198 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
201 /* Ok, looks like we made it. Hook it up and return success. */
202 kmsg->msg_control = kcmsg_base;
203 kmsg->msg_controllen = kcmlen;
209 if (kcmsg_base != (struct cmsghdr *)stackbuf)
210 sock_kfree_s(sk, kcmsg_base, kcmlen);
214 int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
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;
222 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
223 kmsg->msg_flags |= MSG_CTRUNC;
224 return 0; /* XXX: return error? check spec. */
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;
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;
242 cmlen = CMSG_COMPAT_LEN(len);
243 if (kmsg->msg_controllen < cmlen) {
244 kmsg->msg_flags |= MSG_CTRUNC;
245 cmlen = kmsg->msg_controllen;
247 cmhdr.cmsg_level = level;
248 cmhdr.cmsg_type = type;
249 cmhdr.cmsg_len = cmlen;
251 if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
253 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
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;
263 void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
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;
275 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
277 err = security_file_receive(fp[i]);
280 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags
285 err = put_user(new_fd, cmfptr);
287 put_unused_fd(new_fd);
290 /* Bump the usage count and install the file. */
292 fd_install(new_fd, fp[i]);
296 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
297 err = put_user(SOL_SOCKET, &cm->cmsg_level);
299 err = put_user(SCM_RIGHTS, &cm->cmsg_type);
301 err = put_user(cmlen, &cm->cmsg_len);
303 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
304 kmsg->msg_control += cmlen;
305 kmsg->msg_controllen -= cmlen;
309 kmsg->msg_flags |= MSG_CTRUNC;
312 * All of the files that fit in the message have had their
313 * usage counts incremented, so we just free the list.
319 * A struct sock_filter is architecture independent.
321 struct compat_sock_fprog {
323 compat_uptr_t filter; /* struct sock_filter * */
326 static int do_set_attach_filter(struct socket *sock, int level, int optname,
327 char __user *optval, int optlen)
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));
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))
342 return sock_setsockopt(sock, level, optname, (char __user *)kfprog,
343 sizeof(struct sock_fprog));
346 static int do_set_sock_timeout(struct socket *sock, int level,
347 int optname, char __user *optval, int optlen)
349 struct compat_timeval __user *up = (struct compat_timeval __user *) optval;
350 struct timeval ktime;
354 if (optlen < sizeof(*up))
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))
362 err = sock_setsockopt(sock, level, optname, (char *) &ktime, sizeof(ktime));
368 static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
369 char __user *optval, int optlen)
371 if (optname == SO_ATTACH_FILTER)
372 return do_set_attach_filter(sock, level, optname,
374 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
375 return do_set_sock_timeout(sock, level, optname, optval, optlen);
377 return sock_setsockopt(sock, level, optname, optval, optlen);
380 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
381 char __user *optval, int optlen)
389 if ((sock = sockfd_lookup(fd, &err))!=NULL)
391 err = security_socket_setsockopt(sock,level,optname);
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);
404 err = sock->ops->setsockopt(sock, level,
405 optname, optval, optlen);
411 static int do_get_sock_timeout(struct socket *sock, int level, int optname,
412 char __user *optval, int __user *optlen)
414 struct compat_timeval __user *up;
415 struct timeval ktime;
419 up = (struct compat_timeval __user *) optval;
420 if (get_user(len, optlen))
422 if (len < sizeof(*up))
427 err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len);
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))
440 static int compat_sock_getsockopt(struct socket *sock, int level, int optname,
441 char __user *optval, int __user *optlen)
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);
448 int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
450 struct compat_timeval __user *ctv =
451 (struct compat_timeval __user*) userstamp;
455 if (!sock_flag(sk, SOCK_TIMESTAMP))
456 sock_enable_timestamp(sk);
457 tv = ktime_to_timeval(sk->sk_stamp);
460 if (tv.tv_sec == 0) {
461 sk->sk_stamp = ktime_get_real();
462 tv = ktime_to_timeval(sk->sk_stamp);
465 if (put_user(tv.tv_sec, &ctv->tv_sec) ||
466 put_user(tv.tv_usec, &ctv->tv_usec))
470 EXPORT_SYMBOL(compat_sock_get_timestamp);
472 int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp)
474 struct compat_timespec __user *ctv =
475 (struct compat_timespec __user*) userstamp;
479 if (!sock_flag(sk, SOCK_TIMESTAMP))
480 sock_enable_timestamp(sk);
481 ts = ktime_to_timespec(sk->sk_stamp);
484 if (ts.tv_sec == 0) {
485 sk->sk_stamp = ktime_get_real();
486 ts = ktime_to_timespec(sk->sk_stamp);
489 if (put_user(ts.tv_sec, &ctv->tv_sec) ||
490 put_user(ts.tv_nsec, &ctv->tv_nsec))
494 EXPORT_SYMBOL(compat_sock_get_timestampns);
496 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
497 char __user *optval, int __user *optlen)
502 if ((sock = sockfd_lookup(fd, &err))!=NULL)
504 err = security_socket_getsockopt(sock, level,
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);
518 err = sock->ops->getsockopt(sock, level,
519 optname, optval, optlen);
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)};
531 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags)
533 return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
536 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
538 return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
541 asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
547 if (call < SYS_SOCKET || call > SYS_RECVMSG)
549 if (copy_from_user(a, args, nas[call]))
556 ret = sys_socket(a0, a1, a[2]);
559 ret = sys_bind(a0, compat_ptr(a1), a[2]);
562 ret = sys_connect(a0, compat_ptr(a1), a[2]);
565 ret = sys_listen(a0, a1);
568 ret = sys_accept(a0, compat_ptr(a1), compat_ptr(a[2]));
570 case SYS_GETSOCKNAME:
571 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
573 case SYS_GETPEERNAME:
574 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
577 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
580 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
583 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
586 ret = sys_recv(a0, compat_ptr(a1), a[2], a[3]);
589 ret = sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), compat_ptr(a[5]));
592 ret = sys_shutdown(a0,a1);
595 ret = compat_sys_setsockopt(a0, a1, a[2],
596 compat_ptr(a[3]), a[4]);
599 ret = compat_sys_getsockopt(a0, a1, a[2],
600 compat_ptr(a[3]), compat_ptr(a[4]));
603 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
606 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);