1 /*-
2 * Copyright (c) 1995 Søren Schmidt
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD: releng/6.3/sys/compat/linux/linux_socket.c 172041 2007-09-03 13:18:42Z netchild $");
31
32 /* XXX we use functions that might not exist. */
33 #include "opt_compat.h"
34 #include "opt_inet6.h"
35
36 #ifndef COMPAT_43
37 #error "Unable to compile Linux-emulator due to missing COMPAT_43 option!"
38 #endif
39
40 #include <sys/param.h>
41 #include <sys/proc.h>
42 #include <sys/systm.h>
43 #include <sys/sysproto.h>
44 #include <sys/fcntl.h>
45 #include <sys/file.h>
46 #include <sys/limits.h>
47 #include <sys/lock.h>
48 #include <sys/malloc.h>
49 #include <sys/mutex.h>
50 #include <sys/mbuf.h>
51 #include <sys/socket.h>
52 #include <sys/socketvar.h>
53 #include <sys/syscallsubr.h>
54 #include <sys/uio.h>
55 #include <sys/syslog.h>
56 #include <sys/un.h>
57
58 #include <netinet/in.h>
59 #include <netinet/in_systm.h>
60 #include <netinet/ip.h>
61 #ifdef INET6
62 #include <netinet/ip6.h>
63 #include <netinet6/ip6_var.h>
64 #endif
65
66 #include "opt_compat.h"
67
68 #ifdef COMPAT_LINUX32
69 #include <machine/../linux32/linux.h>
70 #include <machine/../linux32/linux32_proto.h>
71 #else
72 #include <machine/../linux/linux.h>
73 #include <machine/../linux/linux_proto.h>
74 #endif
75 #include <compat/linux/linux_socket.h>
76 #include <compat/linux/linux_util.h>
77
78 static int do_sa_get(struct sockaddr **, const struct osockaddr *, int *,
79 struct malloc_type *);
80 static int linux_to_bsd_domain(int);
81
82 /*
83 * Reads a linux sockaddr and does any necessary translation.
84 * Linux sockaddrs don't have a length field, only a family.
85 */
86 static int
87 linux_getsockaddr(struct sockaddr **sap, const struct osockaddr *osa, int len)
88 {
89 int osalen = len;
90
91 return (do_sa_get(sap, osa, &osalen, M_SONAME));
92 }
93
94 /*
95 * Copy the osockaddr structure pointed to by osa to kernel, adjust
96 * family and convert to sockaddr.
97 */
98 static int
99 do_sa_get(struct sockaddr **sap, const struct osockaddr *osa, int *osalen,
100 struct malloc_type *mtype)
101 {
102 int error=0, bdom;
103 struct sockaddr *sa;
104 struct osockaddr *kosa;
105 int alloclen;
106 #ifdef INET6
107 int oldv6size;
108 struct sockaddr_in6 *sin6;
109 #endif
110
111 if (*osalen < 2 || *osalen > UCHAR_MAX || !osa)
112 return (EINVAL);
113
114 alloclen = *osalen;
115 #ifdef INET6
116 oldv6size = 0;
117 /*
118 * Check for old (pre-RFC2553) sockaddr_in6. We may accept it
119 * if it's a v4-mapped address, so reserve the proper space
120 * for it.
121 */
122 if (alloclen == sizeof (struct sockaddr_in6) - sizeof (u_int32_t)) {
123 alloclen = sizeof (struct sockaddr_in6);
124 oldv6size = 1;
125 }
126 #endif
127
128 MALLOC(kosa, struct osockaddr *, alloclen, mtype, M_WAITOK);
129
130 if ((error = copyin(osa, kosa, *osalen)))
131 goto out;
132
133 bdom = linux_to_bsd_domain(kosa->sa_family);
134 if (bdom == -1) {
135 error = EINVAL;
136 goto out;
137 }
138
139 #ifdef INET6
140 /*
141 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6,
142 * which lacks the scope id compared with RFC2553 one. If we detect
143 * the situation, reject the address and write a message to system log.
144 *
145 * Still accept addresses for which the scope id is not used.
146 */
147 if (oldv6size && bdom == AF_INET6) {
148 sin6 = (struct sockaddr_in6 *)kosa;
149 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) ||
150 (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
151 !IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
152 !IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) &&
153 !IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
154 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) {
155 sin6->sin6_scope_id = 0;
156 } else {
157 log(LOG_DEBUG,
158 "obsolete pre-RFC2553 sockaddr_in6 rejected\n");
159 error = EINVAL;
160 goto out;
161 }
162 } else
163 #endif
164 if (bdom == AF_INET)
165 alloclen = sizeof(struct sockaddr_in);
166
167 sa = (struct sockaddr *) kosa;
168 sa->sa_family = bdom;
169 sa->sa_len = alloclen;
170
171 *sap = sa;
172 *osalen = alloclen;
173 return (0);
174
175 out:
176 FREE(kosa, mtype);
177 return (error);
178 }
179
180 static int
181 linux_to_bsd_domain(int domain)
182 {
183
184 switch (domain) {
185 case LINUX_AF_UNSPEC:
186 return (AF_UNSPEC);
187 case LINUX_AF_UNIX:
188 return (AF_LOCAL);
189 case LINUX_AF_INET:
190 return (AF_INET);
191 case LINUX_AF_INET6:
192 return (AF_INET6);
193 case LINUX_AF_AX25:
194 return (AF_CCITT);
195 case LINUX_AF_IPX:
196 return (AF_IPX);
197 case LINUX_AF_APPLETALK:
198 return (AF_APPLETALK);
199 }
200 return (-1);
201 }
202
203 #ifndef __alpha__
204 static int
205 bsd_to_linux_domain(int domain)
206 {
207
208 switch (domain) {
209 case AF_UNSPEC:
210 return (LINUX_AF_UNSPEC);
211 case AF_LOCAL:
212 return (LINUX_AF_UNIX);
213 case AF_INET:
214 return (LINUX_AF_INET);
215 case AF_INET6:
216 return (LINUX_AF_INET6);
217 case AF_CCITT:
218 return (LINUX_AF_AX25);
219 case AF_IPX:
220 return (LINUX_AF_IPX);
221 case AF_APPLETALK:
222 return (LINUX_AF_APPLETALK);
223 }
224 return (-1);
225 }
226
227 static int
228 linux_to_bsd_sockopt_level(int level)
229 {
230
231 switch (level) {
232 case LINUX_SOL_SOCKET:
233 return (SOL_SOCKET);
234 }
235 return (level);
236 }
237
238 static int
239 bsd_to_linux_sockopt_level(int level)
240 {
241
242 switch (level) {
243 case SOL_SOCKET:
244 return (LINUX_SOL_SOCKET);
245 }
246 return (level);
247 }
248
249 static int
250 linux_to_bsd_ip_sockopt(int opt)
251 {
252
253 switch (opt) {
254 case LINUX_IP_TOS:
255 return (IP_TOS);
256 case LINUX_IP_TTL:
257 return (IP_TTL);
258 case LINUX_IP_OPTIONS:
259 return (IP_OPTIONS);
260 case LINUX_IP_MULTICAST_IF:
261 return (IP_MULTICAST_IF);
262 case LINUX_IP_MULTICAST_TTL:
263 return (IP_MULTICAST_TTL);
264 case LINUX_IP_MULTICAST_LOOP:
265 return (IP_MULTICAST_LOOP);
266 case LINUX_IP_ADD_MEMBERSHIP:
267 return (IP_ADD_MEMBERSHIP);
268 case LINUX_IP_DROP_MEMBERSHIP:
269 return (IP_DROP_MEMBERSHIP);
270 case LINUX_IP_HDRINCL:
271 return (IP_HDRINCL);
272 }
273 return (-1);
274 }
275
276 static int
277 linux_to_bsd_so_sockopt(int opt)
278 {
279
280 switch (opt) {
281 case LINUX_SO_DEBUG:
282 return (SO_DEBUG);
283 case LINUX_SO_REUSEADDR:
284 return (SO_REUSEADDR);
285 case LINUX_SO_TYPE:
286 return (SO_TYPE);
287 case LINUX_SO_ERROR:
288 return (SO_ERROR);
289 case LINUX_SO_DONTROUTE:
290 return (SO_DONTROUTE);
291 case LINUX_SO_BROADCAST:
292 return (SO_BROADCAST);
293 case LINUX_SO_SNDBUF:
294 return (SO_SNDBUF);
295 case LINUX_SO_RCVBUF:
296 return (SO_RCVBUF);
297 case LINUX_SO_KEEPALIVE:
298 return (SO_KEEPALIVE);
299 case LINUX_SO_OOBINLINE:
300 return (SO_OOBINLINE);
301 case LINUX_SO_LINGER:
302 return (SO_LINGER);
303 case LINUX_SO_PEERCRED:
304 return (LOCAL_PEERCRED);
305 case LINUX_SO_RCVLOWAT:
306 return (SO_RCVLOWAT);
307 case LINUX_SO_SNDLOWAT:
308 return (SO_SNDLOWAT);
309 case LINUX_SO_RCVTIMEO:
310 return (SO_RCVTIMEO);
311 case LINUX_SO_SNDTIMEO:
312 return (SO_SNDTIMEO);
313 case LINUX_SO_TIMESTAMP:
314 return (SO_TIMESTAMP);
315 case LINUX_SO_ACCEPTCONN:
316 return (SO_ACCEPTCONN);
317 }
318 return (-1);
319 }
320
321 static int
322 linux_to_bsd_msg_flags(int flags)
323 {
324 int ret_flags = 0;
325
326 if (flags & LINUX_MSG_OOB)
327 ret_flags |= MSG_OOB;
328 if (flags & LINUX_MSG_PEEK)
329 ret_flags |= MSG_PEEK;
330 if (flags & LINUX_MSG_DONTROUTE)
331 ret_flags |= MSG_DONTROUTE;
332 if (flags & LINUX_MSG_CTRUNC)
333 ret_flags |= MSG_CTRUNC;
334 if (flags & LINUX_MSG_TRUNC)
335 ret_flags |= MSG_TRUNC;
336 if (flags & LINUX_MSG_DONTWAIT)
337 ret_flags |= MSG_DONTWAIT;
338 if (flags & LINUX_MSG_EOR)
339 ret_flags |= MSG_EOR;
340 if (flags & LINUX_MSG_WAITALL)
341 ret_flags |= MSG_WAITALL;
342 if (flags & LINUX_MSG_NOSIGNAL)
343 ret_flags |= MSG_NOSIGNAL;
344 #if 0 /* not handled */
345 if (flags & LINUX_MSG_PROXY)
346 ;
347 if (flags & LINUX_MSG_FIN)
348 ;
349 if (flags & LINUX_MSG_SYN)
350 ;
351 if (flags & LINUX_MSG_CONFIRM)
352 ;
353 if (flags & LINUX_MSG_RST)
354 ;
355 if (flags & LINUX_MSG_ERRQUEUE)
356 ;
357 #endif
358 return ret_flags;
359 }
360
361 /*
362 * If bsd_to_linux_sockaddr() or linux_to_bsd_sockaddr() faults, then the
363 * native syscall will fault. Thus, we don't really need to check the
364 * return values for these functions.
365 */
366
367 static int
368 bsd_to_linux_sockaddr(struct sockaddr *arg)
369 {
370 struct sockaddr sa;
371 size_t sa_len = sizeof(struct sockaddr);
372 int error;
373
374 if ((error = copyin(arg, &sa, sa_len)))
375 return (error);
376
377 *(u_short *)&sa = sa.sa_family;
378
379 error = copyout(&sa, arg, sa_len);
380
381 return (error);
382 }
383
384 static int
385 linux_to_bsd_sockaddr(struct sockaddr *arg, int len)
386 {
387 struct sockaddr sa;
388 size_t sa_len = sizeof(struct sockaddr);
389 int error;
390
391 if ((error = copyin(arg, &sa, sa_len)))
392 return (error);
393
394 sa.sa_family = *(sa_family_t *)&sa;
395 sa.sa_len = len;
396
397 error = copyout(&sa, arg, sa_len);
398
399 return (error);
400 }
401
402
403 static int
404 linux_sa_put(struct osockaddr *osa)
405 {
406 struct osockaddr sa;
407 int error, bdom;
408
409 /*
410 * Only read/write the osockaddr family part, the rest is
411 * not changed.
412 */
413 error = copyin(osa, &sa, sizeof(sa.sa_family));
414 if (error)
415 return (error);
416
417 bdom = bsd_to_linux_domain(sa.sa_family);
418 if (bdom == -1)
419 return (EINVAL);
420
421 sa.sa_family = bdom;
422 error = copyout(&sa, osa, sizeof(sa.sa_family));
423 if (error)
424 return (error);
425
426 return (0);
427 }
428
429 static int
430 linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags,
431 enum uio_seg segflg)
432 {
433 struct mbuf *control;
434 struct sockaddr *to;
435 int error;
436
437 if (mp->msg_name != NULL) {
438 error = linux_getsockaddr(&to, mp->msg_name, mp->msg_namelen);
439 if (error)
440 return (error);
441 mp->msg_name = to;
442 } else
443 to = NULL;
444
445 if (mp->msg_control != NULL) {
446 struct cmsghdr *cmsg;
447
448 if (mp->msg_controllen < sizeof(struct cmsghdr)) {
449 error = EINVAL;
450 goto bad;
451 }
452 error = sockargs(&control, mp->msg_control,
453 mp->msg_controllen, MT_CONTROL);
454 if (error)
455 goto bad;
456
457 cmsg = mtod(control, struct cmsghdr *);
458 cmsg->cmsg_level = linux_to_bsd_sockopt_level(cmsg->cmsg_level);
459 } else
460 control = NULL;
461
462 error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control,
463 segflg);
464
465 bad:
466 if (to)
467 FREE(to, M_SONAME);
468 return (error);
469 }
470
471 /* Return 0 if IP_HDRINCL is set for the given socket. */
472 static int
473 linux_check_hdrincl(struct thread *td, int s)
474 {
475 int error, optval, size_val;
476
477 size_val = sizeof(optval);
478 error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL,
479 &optval, UIO_SYSSPACE, &size_val);
480 if (error)
481 return (error);
482
483 return (optval == 0);
484 }
485
486 struct linux_sendto_args {
487 int s;
488 l_uintptr_t msg;
489 int len;
490 int flags;
491 l_uintptr_t to;
492 int tolen;
493 };
494
495 /*
496 * Updated sendto() when IP_HDRINCL is set:
497 * tweak endian-dependent fields in the IP packet.
498 */
499 static int
500 linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args)
501 {
502 /*
503 * linux_ip_copysize defines how many bytes we should copy
504 * from the beginning of the IP packet before we customize it for BSD.
505 * It should include all the fields we modify (ip_len and ip_off).
506 */
507 #define linux_ip_copysize 8
508
509 struct ip *packet;
510 struct msghdr msg;
511 struct iovec aiov[1];
512 int error;
513
514 /* Check that the packet isn't too big or too small. */
515 if (linux_args->len < linux_ip_copysize ||
516 linux_args->len > IP_MAXPACKET)
517 return (EINVAL);
518
519 packet = (struct ip *)malloc(linux_args->len, M_TEMP, M_WAITOK);
520
521 /* Make kernel copy of the packet to be sent */
522 if ((error = copyin(PTRIN(linux_args->msg), packet,
523 linux_args->len)))
524 goto goout;
525
526 /* Convert fields from Linux to BSD raw IP socket format */
527 packet->ip_len = linux_args->len;
528 packet->ip_off = ntohs(packet->ip_off);
529
530 /* Prepare the msghdr and iovec structures describing the new packet */
531 msg.msg_name = PTRIN(linux_args->to);
532 msg.msg_namelen = linux_args->tolen;
533 msg.msg_iov = aiov;
534 msg.msg_iovlen = 1;
535 msg.msg_control = NULL;
536 msg.msg_flags = 0;
537 aiov[0].iov_base = (char *)packet;
538 aiov[0].iov_len = linux_args->len;
539 error = linux_sendit(td, linux_args->s, &msg, linux_args->flags,
540 UIO_SYSSPACE);
541 goout:
542 free(packet, M_TEMP);
543 return (error);
544 }
545
546 struct linux_socket_args {
547 int domain;
548 int type;
549 int protocol;
550 };
551
552 static int
553 linux_socket(struct thread *td, struct linux_socket_args *args)
554 {
555 struct linux_socket_args linux_args;
556 struct socket_args /* {
557 int domain;
558 int type;
559 int protocol;
560 } */ bsd_args;
561 int error;
562 int retval_socket;
563
564 if ((error = copyin(args, &linux_args, sizeof(linux_args))))
565 return (error);
566
567 bsd_args.protocol = linux_args.protocol;
568 bsd_args.type = linux_args.type;
569 bsd_args.domain = linux_to_bsd_domain(linux_args.domain);
570 if (bsd_args.domain == -1)
571 return (EINVAL);
572
573 retval_socket = socket(td, &bsd_args);
574 if (bsd_args.type == SOCK_RAW
575 && (bsd_args.protocol == IPPROTO_RAW || bsd_args.protocol == 0)
576 && bsd_args.domain == AF_INET
577 && retval_socket >= 0) {
578 /* It's a raw IP socket: set the IP_HDRINCL option. */
579 int hdrincl;
580
581 hdrincl = 1;
582 /* We ignore any error returned by kern_setsockopt() */
583 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL,
584 &hdrincl, UIO_SYSSPACE, sizeof(hdrincl));
585 }
586 #ifdef INET6
587 /*
588 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by
589 * default and some apps depend on this. So, set V6ONLY to 0
590 * for Linux apps if the sysctl value is set to 1.
591 */
592 if (bsd_args.domain == PF_INET6 && retval_socket >= 0
593 #ifndef KLD_MODULE
594 /*
595 * XXX: Avoid undefined symbol error with an IPv4 only
596 * kernel.
597 */
598 && ip6_v6only
599 #endif
600 ) {
601 int v6only;
602
603 v6only = 0;
604 /* We ignore any error returned by setsockopt() */
605 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY,
606 &v6only, UIO_SYSSPACE, sizeof(v6only));
607 }
608 #endif
609
610 return (retval_socket);
611 }
612
613 struct linux_bind_args {
614 int s;
615 l_uintptr_t name;
616 int namelen;
617 };
618
619 static int
620 linux_bind(struct thread *td, struct linux_bind_args *args)
621 {
622 struct linux_bind_args linux_args;
623 struct sockaddr *sa;
624 int error;
625
626 if ((error = copyin(args, &linux_args, sizeof(linux_args))))
627 return (error);
628
629 error = linux_getsockaddr(&sa, PTRIN(linux_args.name),
630 linux_args.namelen);
631 if (error)
632 return (error);
633
634 error = kern_bind(td, linux_args.s, sa);
635 if (error == EADDRNOTAVAIL && linux_args.namelen != sizeof(struct sockaddr_in))
636 return (EINVAL);
637 return (error);
638 }
639
640 struct linux_connect_args {
641 int s;
642 l_uintptr_t name;
643 int namelen;
644 };
645 int linux_connect(struct thread *, struct linux_connect_args *);
646 #endif /* !__alpha__*/
647
648 int
649 linux_connect(struct thread *td, struct linux_connect_args *args)
650 {
651 struct linux_connect_args linux_args;
652 struct socket *so;
653 struct sockaddr *sa;
654 u_int fflag;
655 int error;
656
657 #ifdef __alpha__
658 bcopy(args, &linux_args, sizeof(linux_args));
659 #else
660 if ((error = copyin(args, &linux_args, sizeof(linux_args))))
661 return (error);
662 #endif /* __alpha__ */
663
664 error = linux_getsockaddr(&sa,
665 (struct osockaddr *)PTRIN(linux_args.name),
666 linux_args.namelen);
667 if (error)
668 return (error);
669
670 error = kern_connect(td, linux_args.s, sa);
671 if (error != EISCONN)
672 return (error);
673
674 /*
675 * Linux doesn't return EISCONN the first time it occurs,
676 * when on a non-blocking socket. Instead it returns the
677 * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD.
678 *
679 * XXXRW: Instead of using fgetsock(), check that it is a
680 * socket and use the file descriptor reference instead of
681 * creating a new one.
682 */
683 NET_LOCK_GIANT();
684 error = fgetsock(td, linux_args.s, &so, &fflag);
685 if (error == 0) {
686 error = EISCONN;
687 if (fflag & FNONBLOCK) {
688 SOCK_LOCK(so);
689 if (so->so_emuldata == 0)
690 error = so->so_error;
691 so->so_emuldata = (void *)1;
692 SOCK_UNLOCK(so);
693 }
694 fputsock(so);
695 }
696 NET_UNLOCK_GIANT();
697 return (error);
698 }
699
700 #ifndef __alpha__
701
702 struct linux_listen_args {
703 int s;
704 int backlog;
705 };
706
707 static int
708 linux_listen(struct thread *td, struct linux_listen_args *args)
709 {
710 struct linux_listen_args linux_args;
711 struct listen_args /* {
712 int s;
713 int backlog;
714 } */ bsd_args;
715 int error;
716
717 if ((error = copyin(args, &linux_args, sizeof(linux_args))))
718 return (error);
719
720 bsd_args.s = linux_args.s;
721 bsd_args.backlog = linux_args.backlog;
722 return (listen(td, &bsd_args));
723 }
724
725 struct linux_accept_args {
726 int s;
727 l_uintptr_t addr;
728 l_uintptr_t namelen;
729 };
730
731 static int
732 linux_accept(struct thread *td, struct linux_accept_args *args)
733 {
734 struct linux_accept_args linux_args;
735 struct accept_args /* {
736 int s;
737 struct sockaddr * __restrict name;
738 socklen_t * __restrict anamelen;
739 } */ bsd_args;
740 int error, fd;
741
742 if ((error = copyin(args, &linux_args, sizeof(linux_args))))
743 return (error);
744
745 bsd_args.s = linux_args.s;
746 /* XXX: */
747 bsd_args.name = (struct sockaddr * __restrict)PTRIN(linux_args.addr);
748 bsd_args.anamelen = PTRIN(linux_args.namelen);/* XXX */
749 error = accept(td, &bsd_args);
750 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.name);
751 if (error) {
752 if (error == EFAULT && linux_args.namelen != sizeof(struct sockaddr_in))
753 return (EINVAL);
754 return (error);
755 }
756 if (linux_args.addr) {
757 error = linux_sa_put(PTRIN(linux_args.addr));
758 if (error) {
759 (void)kern_close(td, td->td_retval[0]);
760 return (error);
761 }
762 }
763
764 /*
765 * linux appears not to copy flags from the parent socket to the
766 * accepted one, so we must clear the flags in the new descriptor.
767 * Ignore any errors, because we already have an open fd.
768 */
769 fd = td->td_retval[0];
770 (void)kern_fcntl(td, fd, F_SETFL, 0);
771 td->td_retval[0] = fd;
772 return (0);
773 }
774
775 struct linux_getsockname_args {
776 int s;
777 l_uintptr_t addr;
778 l_uintptr_t namelen;
779 };
780
781 static int
782 linux_getsockname(struct thread *td, struct linux_getsockname_args *args)
783 {
784 struct linux_getsockname_args linux_args;
785 struct getsockname_args /* {
786 int fdes;
787 struct sockaddr * __restrict asa;
788 socklen_t * __restrict alen;
789 } */ bsd_args;
790 int error;
791
792 if ((error = copyin(args, &linux_args, sizeof(linux_args))))
793 return (error);
794
795 bsd_args.fdes = linux_args.s;
796 /* XXX: */
797 bsd_args.asa = (struct sockaddr * __restrict)PTRIN(linux_args.addr);
798 bsd_args.alen = PTRIN(linux_args.namelen); /* XXX */
799 error = getsockname(td, &bsd_args);
800 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa);
801 if (error)
802 return (error);
803 error = linux_sa_put(PTRIN(linux_args.addr));
804 if (error)
805 return (error);
806 return (0);
807 }
808
809 struct linux_getpeername_args {
810 int s;
811 l_uintptr_t addr;
812 l_uintptr_t namelen;
813 };
814
815 static int
816 linux_getpeername(struct thread *td, struct linux_getpeername_args *args)
817 {
818 struct linux_getpeername_args linux_args;
819 struct getpeername_args /* {
820 int fdes;
821 caddr_t asa;
822 int *alen;
823 } */ bsd_args;
824 int error;
825
826 if ((error = copyin(args, &linux_args, sizeof(linux_args))))
827 return (error);
828
829 bsd_args.fdes = linux_args.s;
830 bsd_args.asa = (struct sockaddr *)PTRIN(linux_args.addr);
831 bsd_args.alen = (int *)PTRIN(linux_args.namelen);
832 error = getpeername(td, &bsd_args);
833 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa);
834 if (error)
835 return (error);
836 error = linux_sa_put(PTRIN(linux_args.addr));
837 if (error)
838 return (error);
839 return (0);
840 }
841
842 struct linux_socketpair_args {
843 int domain;
844 int type;
845 int protocol;
846 l_uintptr_t rsv;
847 };
848
849 static int
850 linux_socketpair(struct thread *td, struct linux_socketpair_args *args)
851 {
852 struct linux_socketpair_args linux_args;
853 struct socketpair_args /* {
854 int domain;
855 int type;
856 int protocol;
857 int *rsv;
858 } */ bsd_args;
859 int error;
860
861 if ((error = copyin(args, &linux_args, sizeof(linux_args))))
862 return (error);
863
864 bsd_args.domain = linux_to_bsd_domain(linux_args.domain);
865 if (bsd_args.domain == -1)
866 return (EINVAL);
867
868 bsd_args.type = linux_args.type;
869 bsd_args.protocol = linux_args.protocol;
870 bsd_args.rsv = (int *)PTRIN(linux_args.rsv);
871 return (socketpair(td, &bsd_args));
872 }
873
874 struct linux_send_args {
875 int s;
876 l_uintptr_t msg;
877 int len;
878 int flags;
879 };
880
881 static int
882 linux_send(struct thread *td, struct linux_send_args *args)
883 {
884 struct linux_send_args linux_args;
885 struct sendto_args /* {
886 int s;
887 caddr_t buf;
888 int len;
889 int flags;
890 caddr_t to;
891 int tolen;
892 } */ bsd_args;
893 int error;
894
895 if ((error = copyin(args, &linux_args, sizeof(linux_args))))
896 return (error);
897
898 bsd_args.s = linux_args.s;
899 bsd_args.buf = (caddr_t)PTRIN(linux_args.msg);
900 bsd_args.len = linux_args.len;
901 bsd_args.flags = linux_args.flags;
902 bsd_args.to = NULL;
903 bsd_args.tolen = 0;
904 return sendto(td, &bsd_args);
905 }
906
907 struct linux_recv_args {
908 int s;
909 l_uintptr_t msg;
910 int len;
911 int flags;
912 };
913
914 static int
915 linux_recv(struct thread *td, struct linux_recv_args *args)
916 {
917 struct linux_recv_args linux_args;
918 struct recvfrom_args /* {
919 int s;
920 caddr_t buf;
921 int len;
922 int flags;
923 struct sockaddr *from;
924 socklen_t fromlenaddr;
925 } */ bsd_args;
926 int error;
927
928 if ((error = copyin(args, &linux_args, sizeof(linux_args))))
929 return (error);
930
931 bsd_args.s = linux_args.s;
932 bsd_args.buf = (caddr_t)PTRIN(linux_args.msg);
933 bsd_args.len = linux_args.len;
934 bsd_args.flags = linux_args.flags;
935 bsd_args.from = NULL;
936 bsd_args.fromlenaddr = 0;
937 return (recvfrom(td, &bsd_args));
938 }
939
940 static int
941 linux_sendto(struct thread *td, struct linux_sendto_args *args)
942 {
943 struct linux_sendto_args linux_args;
944 struct msghdr msg;
945 struct iovec aiov;
946 int error;
947
948 if ((error = copyin(args, &linux_args, sizeof(linux_args))))
949 return (error);
950
951 if (linux_check_hdrincl(td, linux_args.s) == 0)
952 /* IP_HDRINCL set, tweak the packet before sending */
953 return (linux_sendto_hdrincl(td, &linux_args));
954
955 msg.msg_name = PTRIN(linux_args.to);
956 msg.msg_namelen = linux_args.tolen;
957 msg.msg_iov = &aiov;
958 msg.msg_iovlen = 1;
959 msg.msg_control = NULL;
960 msg.msg_flags = 0;
961 aiov.iov_base = PTRIN(linux_args.msg);
962 aiov.iov_len = linux_args.len;
963 error = linux_sendit(td, linux_args.s, &msg, linux_args.flags,
964 UIO_USERSPACE);
965 return (error);
966 }
967
968 struct linux_recvfrom_args {
969 int s;
970 l_uintptr_t buf;
971 int len;
972 int flags;
973 l_uintptr_t from;
974 l_uintptr_t fromlen;
975 };
976
977 static int
978 linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args)
979 {
980 struct linux_recvfrom_args linux_args;
981 struct recvfrom_args /* {
982 int s;
983 caddr_t buf;
984 size_t len;
985 int flags;
986 struct sockaddr * __restrict from;
987 socklen_t * __restrict fromlenaddr;
988 } */ bsd_args;
989 size_t len;
990 int error;
991
992 if ((error = copyin(args, &linux_args, sizeof(linux_args))))
993 return (error);
994
995 if ((error = copyin(PTRIN(linux_args.fromlen), &len, sizeof(size_t))))
996 return (error);
997
998 bsd_args.s = linux_args.s;
999 bsd_args.buf = PTRIN(linux_args.buf);
1000 bsd_args.len = linux_args.len;
1001 bsd_args.flags = linux_to_bsd_msg_flags(linux_args.flags);
1002 /* XXX: */
1003 bsd_args.from = (struct sockaddr * __restrict)PTRIN(linux_args.from);
1004 bsd_args.fromlenaddr = PTRIN(linux_args.fromlen);/* XXX */
1005
1006 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.from, len);
1007 error = recvfrom(td, &bsd_args);
1008 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.from);
1009
1010 if (error)
1011 return (error);
1012 if (linux_args.from) {
1013 error = linux_sa_put((struct osockaddr *)
1014 PTRIN(linux_args.from));
1015 if (error)
1016 return (error);
1017 }
1018 return (0);
1019 }
1020
1021 struct linux_sendmsg_args {
1022 int s;
1023 l_uintptr_t msg;
1024 int flags;
1025 };
1026
1027 static int
1028 linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args)
1029 {
1030 struct linux_sendmsg_args linux_args;
1031 struct msghdr msg;
1032 struct iovec *iov;
1033 int error;
1034
1035 /* XXXTJR sendmsg is broken on amd64 */
1036
1037 error = copyin(args, &linux_args, sizeof(linux_args));
1038 if (error)
1039 return (error);
1040 error = copyin(PTRIN(linux_args.msg), &msg, sizeof(msg));
1041 if (error)
1042 return (error);
1043
1044 /*
1045 * Some Linux applications (ping) define a non-NULL control data
1046 * pointer, but a msg_controllen of 0, which is not allowed in the
1047 * FreeBSD system call interface. NULL the msg_control pointer in
1048 * order to handle this case. This should be checked, but allows the
1049 * Linux ping to work.
1050 */
1051 if (msg.msg_control != NULL && msg.msg_controllen == 0)
1052 msg.msg_control = NULL;
1053 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
1054 if (error)
1055 return (error);
1056 msg.msg_iov = iov;
1057 msg.msg_flags = 0;
1058 error = linux_sendit(td, linux_args.s, &msg, linux_args.flags,
1059 UIO_USERSPACE);
1060 free(iov, M_IOV);
1061 return (error);
1062 }
1063
1064 struct linux_recvmsg_args {
1065 int s;
1066 l_uintptr_t msg;
1067 int flags;
1068 };
1069
1070 static int
1071 linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args)
1072 {
1073 struct linux_recvmsg_args linux_args;
1074 struct recvmsg_args /* {
1075 int s;
1076 struct msghdr *msg;
1077 int flags;
1078 } */ bsd_args;
1079 struct msghdr msg;
1080 struct cmsghdr *cmsg;
1081 int error;
1082
1083 /* XXXTJR recvmsg is broken on amd64 */
1084
1085 if ((error = copyin(args, &linux_args, sizeof(linux_args))))
1086 return (error);
1087
1088 if ((error = copyin(PTRIN(args->msg), &msg, sizeof (msg))))
1089 return (error);
1090
1091 bsd_args.s = linux_args.s;
1092 bsd_args.msg = PTRIN(linux_args.msg);
1093 bsd_args.flags = linux_to_bsd_msg_flags(linux_args.flags);
1094 if (msg.msg_name) {
1095 linux_to_bsd_sockaddr((struct sockaddr *)msg.msg_name,
1096 msg.msg_namelen);
1097 error = recvmsg(td, &bsd_args);
1098 bsd_to_linux_sockaddr((struct sockaddr *)msg.msg_name);
1099 } else
1100 error = recvmsg(td, &bsd_args);
1101 if (error)
1102 return (error);
1103
1104 if (bsd_args.msg->msg_control != NULL &&
1105 bsd_args.msg->msg_controllen > 0) {
1106 cmsg = (struct cmsghdr*)bsd_args.msg->msg_control;
1107 cmsg->cmsg_level = bsd_to_linux_sockopt_level(cmsg->cmsg_level);
1108 }
1109
1110 error = copyin(PTRIN(linux_args.msg), &msg, sizeof(msg));
1111 if (error)
1112 return (error);
1113 if (msg.msg_name && msg.msg_namelen > 2)
1114 error = linux_sa_put(msg.msg_name);
1115 return (error);
1116 }
1117
1118 struct linux_shutdown_args {
1119 int s;
1120 int how;
1121 };
1122
1123 static int
1124 linux_shutdown(struct thread *td, struct linux_shutdown_args *args)
1125 {
1126 struct linux_shutdown_args linux_args;
1127 struct shutdown_args /* {
1128 int s;
1129 int how;
1130 } */ bsd_args;
1131 int error;
1132
1133 if ((error = copyin(args, &linux_args, sizeof(linux_args))))
1134 return (error);
1135
1136 bsd_args.s = linux_args.s;
1137 bsd_args.how = linux_args.how;
1138 return (shutdown(td, &bsd_args));
1139 }
1140
1141 struct linux_setsockopt_args {
1142 int s;
1143 int level;
1144 int optname;
1145 l_uintptr_t optval;
1146 int optlen;
1147 };
1148
1149 static int
1150 linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args)
1151 {
1152 struct linux_setsockopt_args linux_args;
1153 struct setsockopt_args /* {
1154 int s;
1155 int level;
1156 int name;
1157 caddr_t val;
1158 int valsize;
1159 } */ bsd_args;
1160 int error, name;
1161
1162 if ((error = copyin(args, &linux_args, sizeof(linux_args))))
1163 return (error);
1164
1165 bsd_args.s = linux_args.s;
1166 bsd_args.level = linux_to_bsd_sockopt_level(linux_args.level);
1167 switch (bsd_args.level) {
1168 case SOL_SOCKET:
1169 name = linux_to_bsd_so_sockopt(linux_args.optname);
1170 break;
1171 case IPPROTO_IP:
1172 name = linux_to_bsd_ip_sockopt(linux_args.optname);
1173 break;
1174 case IPPROTO_TCP:
1175 /* Linux TCP option values match BSD's */
1176 name = linux_args.optname;
1177 break;
1178 default:
1179 name = -1;
1180 break;
1181 }
1182 if (name == -1)
1183 return (ENOPROTOOPT);
1184
1185 bsd_args.name = name;
1186 bsd_args.val = PTRIN(linux_args.optval);
1187 bsd_args.valsize = linux_args.optlen;
1188
1189 if (name == IPV6_NEXTHOP) {
1190 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val,
1191 bsd_args.valsize);
1192 error = setsockopt(td, &bsd_args);
1193 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val);
1194 } else
1195 error = setsockopt(td, &bsd_args);
1196
1197 return (error);
1198 }
1199
1200 struct linux_getsockopt_args {
1201 int s;
1202 int level;
1203 int optname;
1204 l_uintptr_t optval;
1205 l_uintptr_t optlen;
1206 };
1207
1208 static int
1209 linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args)
1210 {
1211 struct linux_getsockopt_args linux_args;
1212 struct getsockopt_args /* {
1213 int s;
1214 int level;
1215 int name;
1216 caddr_t val;
1217 int *avalsize;
1218 } */ bsd_args;
1219 int error, name;
1220
1221 if ((error = copyin(args, &linux_args, sizeof(linux_args))))
1222 return (error);
1223
1224 bsd_args.s = linux_args.s;
1225 bsd_args.level = linux_to_bsd_sockopt_level(linux_args.level);
1226 switch (bsd_args.level) {
1227 case SOL_SOCKET:
1228 name = linux_to_bsd_so_sockopt(linux_args.optname);
1229 break;
1230 case IPPROTO_IP:
1231 name = linux_to_bsd_ip_sockopt(linux_args.optname);
1232 break;
1233 case IPPROTO_TCP:
1234 /* Linux TCP option values match BSD's */
1235 name = linux_args.optname;
1236 break;
1237 default:
1238 name = -1;
1239 break;
1240 }
1241 if (name == -1)
1242 return (EINVAL);
1243
1244 bsd_args.name = name;
1245 bsd_args.val = PTRIN(linux_args.optval);
1246 bsd_args.avalsize = PTRIN(linux_args.optlen);
1247
1248 if (name == IPV6_NEXTHOP) {
1249 error = getsockopt(td, &bsd_args);
1250 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val);
1251 } else
1252 error = getsockopt(td, &bsd_args);
1253
1254 return (error);
1255 }
1256
1257 int
1258 linux_socketcall(struct thread *td, struct linux_socketcall_args *args)
1259 {
1260 void *arg = (void *)(intptr_t)args->args;
1261
1262 switch (args->what) {
1263 case LINUX_SOCKET:
1264 return (linux_socket(td, arg));
1265 case LINUX_BIND:
1266 return (linux_bind(td, arg));
1267 case LINUX_CONNECT:
1268 return (linux_connect(td, arg));
1269 case LINUX_LISTEN:
1270 return (linux_listen(td, arg));
1271 case LINUX_ACCEPT:
1272 return (linux_accept(td, arg));
1273 case LINUX_GETSOCKNAME:
1274 return (linux_getsockname(td, arg));
1275 case LINUX_GETPEERNAME:
1276 return (linux_getpeername(td, arg));
1277 case LINUX_SOCKETPAIR:
1278 return (linux_socketpair(td, arg));
1279 case LINUX_SEND:
1280 return (linux_send(td, arg));
1281 case LINUX_RECV:
1282 return (linux_recv(td, arg));
1283 case LINUX_SENDTO:
1284 return (linux_sendto(td, arg));
1285 case LINUX_RECVFROM:
1286 return (linux_recvfrom(td, arg));
1287 case LINUX_SHUTDOWN:
1288 return (linux_shutdown(td, arg));
1289 case LINUX_SETSOCKOPT:
1290 return (linux_setsockopt(td, arg));
1291 case LINUX_GETSOCKOPT:
1292 return (linux_getsockopt(td, arg));
1293 case LINUX_SENDMSG:
1294 return (linux_sendmsg(td, arg));
1295 case LINUX_RECVMSG:
1296 return (linux_recvmsg(td, arg));
1297 }
1298
1299 uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what);
1300 return (ENOSYS);
1301 }
1302 #endif /*!__alpha__*/
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