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/9.2/sys/compat/linux/linux_socket.c 247558 2013-03-01 18:39:46Z jhb $");
31
32 /* XXX we use functions that might not exist. */
33 #include "opt_compat.h"
34 #include "opt_inet6.h"
35
36 #include <sys/param.h>
37 #include <sys/proc.h>
38 #include <sys/systm.h>
39 #include <sys/sysproto.h>
40 #include <sys/capability.h>
41 #include <sys/fcntl.h>
42 #include <sys/file.h>
43 #include <sys/limits.h>
44 #include <sys/lock.h>
45 #include <sys/malloc.h>
46 #include <sys/mutex.h>
47 #include <sys/mbuf.h>
48 #include <sys/socket.h>
49 #include <sys/socketvar.h>
50 #include <sys/syscallsubr.h>
51 #include <sys/uio.h>
52 #include <sys/syslog.h>
53 #include <sys/un.h>
54
55 #include <net/if.h>
56 #include <netinet/in.h>
57 #include <netinet/in_systm.h>
58 #include <netinet/ip.h>
59 #include <netinet/tcp.h>
60 #ifdef INET6
61 #include <netinet/ip6.h>
62 #include <netinet6/ip6_var.h>
63 #include <netinet6/in6_var.h>
64 #endif
65
66 #ifdef COMPAT_LINUX32
67 #include <machine/../linux32/linux.h>
68 #include <machine/../linux32/linux32_proto.h>
69 #else
70 #include <machine/../linux/linux.h>
71 #include <machine/../linux/linux_proto.h>
72 #endif
73 #include <compat/linux/linux_socket.h>
74 #include <compat/linux/linux_util.h>
75
76 static int linux_to_bsd_domain(int);
77
78 /*
79 * Reads a linux sockaddr and does any necessary translation.
80 * Linux sockaddrs don't have a length field, only a family.
81 * Copy the osockaddr structure pointed to by osa to kernel, adjust
82 * family and convert to sockaddr.
83 */
84 static int
85 linux_getsockaddr(struct sockaddr **sap, const struct osockaddr *osa, int salen)
86 {
87 struct sockaddr *sa;
88 struct osockaddr *kosa;
89 #ifdef INET6
90 struct sockaddr_in6 *sin6;
91 int oldv6size;
92 #endif
93 char *name;
94 int bdom, error, hdrlen, namelen;
95
96 if (salen < 2 || salen > UCHAR_MAX || !osa)
97 return (EINVAL);
98
99 #ifdef INET6
100 oldv6size = 0;
101 /*
102 * Check for old (pre-RFC2553) sockaddr_in6. We may accept it
103 * if it's a v4-mapped address, so reserve the proper space
104 * for it.
105 */
106 if (salen == sizeof(struct sockaddr_in6) - sizeof(uint32_t)) {
107 salen += sizeof(uint32_t);
108 oldv6size = 1;
109 }
110 #endif
111
112 kosa = malloc(salen, M_SONAME, M_WAITOK);
113
114 if ((error = copyin(osa, kosa, salen)))
115 goto out;
116
117 bdom = linux_to_bsd_domain(kosa->sa_family);
118 if (bdom == -1) {
119 error = EAFNOSUPPORT;
120 goto out;
121 }
122
123 #ifdef INET6
124 /*
125 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6,
126 * which lacks the scope id compared with RFC2553 one. If we detect
127 * the situation, reject the address and write a message to system log.
128 *
129 * Still accept addresses for which the scope id is not used.
130 */
131 if (oldv6size) {
132 if (bdom == AF_INET6) {
133 sin6 = (struct sockaddr_in6 *)kosa;
134 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) ||
135 (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
136 !IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
137 !IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) &&
138 !IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
139 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) {
140 sin6->sin6_scope_id = 0;
141 } else {
142 log(LOG_DEBUG,
143 "obsolete pre-RFC2553 sockaddr_in6 rejected\n");
144 error = EINVAL;
145 goto out;
146 }
147 } else
148 salen -= sizeof(uint32_t);
149 }
150 #endif
151 if (bdom == AF_INET) {
152 if (salen < sizeof(struct sockaddr_in)) {
153 error = EINVAL;
154 goto out;
155 }
156 salen = sizeof(struct sockaddr_in);
157 }
158
159 if (bdom == AF_LOCAL && salen > sizeof(struct sockaddr_un)) {
160 hdrlen = offsetof(struct sockaddr_un, sun_path);
161 name = ((struct sockaddr_un *)kosa)->sun_path;
162 if (*name == '\0') {
163 /*
164 * Linux abstract namespace starts with a NULL byte.
165 * XXX We do not support abstract namespace yet.
166 */
167 namelen = strnlen(name + 1, salen - hdrlen - 1) + 1;
168 } else
169 namelen = strnlen(name, salen - hdrlen);
170 salen = hdrlen + namelen;
171 if (salen > sizeof(struct sockaddr_un)) {
172 error = ENAMETOOLONG;
173 goto out;
174 }
175 }
176
177 sa = (struct sockaddr *)kosa;
178 sa->sa_family = bdom;
179 sa->sa_len = salen;
180
181 *sap = sa;
182 return (0);
183
184 out:
185 free(kosa, M_SONAME);
186 return (error);
187 }
188
189 static int
190 linux_to_bsd_domain(int domain)
191 {
192
193 switch (domain) {
194 case LINUX_AF_UNSPEC:
195 return (AF_UNSPEC);
196 case LINUX_AF_UNIX:
197 return (AF_LOCAL);
198 case LINUX_AF_INET:
199 return (AF_INET);
200 case LINUX_AF_INET6:
201 return (AF_INET6);
202 case LINUX_AF_AX25:
203 return (AF_CCITT);
204 case LINUX_AF_IPX:
205 return (AF_IPX);
206 case LINUX_AF_APPLETALK:
207 return (AF_APPLETALK);
208 }
209 return (-1);
210 }
211
212 static int
213 bsd_to_linux_domain(int domain)
214 {
215
216 switch (domain) {
217 case AF_UNSPEC:
218 return (LINUX_AF_UNSPEC);
219 case AF_LOCAL:
220 return (LINUX_AF_UNIX);
221 case AF_INET:
222 return (LINUX_AF_INET);
223 case AF_INET6:
224 return (LINUX_AF_INET6);
225 case AF_CCITT:
226 return (LINUX_AF_AX25);
227 case AF_IPX:
228 return (LINUX_AF_IPX);
229 case AF_APPLETALK:
230 return (LINUX_AF_APPLETALK);
231 }
232 return (-1);
233 }
234
235 static int
236 linux_to_bsd_sockopt_level(int level)
237 {
238
239 switch (level) {
240 case LINUX_SOL_SOCKET:
241 return (SOL_SOCKET);
242 }
243 return (level);
244 }
245
246 static int
247 bsd_to_linux_sockopt_level(int level)
248 {
249
250 switch (level) {
251 case SOL_SOCKET:
252 return (LINUX_SOL_SOCKET);
253 }
254 return (level);
255 }
256
257 static int
258 linux_to_bsd_ip_sockopt(int opt)
259 {
260
261 switch (opt) {
262 case LINUX_IP_TOS:
263 return (IP_TOS);
264 case LINUX_IP_TTL:
265 return (IP_TTL);
266 case LINUX_IP_OPTIONS:
267 return (IP_OPTIONS);
268 case LINUX_IP_MULTICAST_IF:
269 return (IP_MULTICAST_IF);
270 case LINUX_IP_MULTICAST_TTL:
271 return (IP_MULTICAST_TTL);
272 case LINUX_IP_MULTICAST_LOOP:
273 return (IP_MULTICAST_LOOP);
274 case LINUX_IP_ADD_MEMBERSHIP:
275 return (IP_ADD_MEMBERSHIP);
276 case LINUX_IP_DROP_MEMBERSHIP:
277 return (IP_DROP_MEMBERSHIP);
278 case LINUX_IP_HDRINCL:
279 return (IP_HDRINCL);
280 }
281 return (-1);
282 }
283
284 static int
285 linux_to_bsd_so_sockopt(int opt)
286 {
287
288 switch (opt) {
289 case LINUX_SO_DEBUG:
290 return (SO_DEBUG);
291 case LINUX_SO_REUSEADDR:
292 return (SO_REUSEADDR);
293 case LINUX_SO_TYPE:
294 return (SO_TYPE);
295 case LINUX_SO_ERROR:
296 return (SO_ERROR);
297 case LINUX_SO_DONTROUTE:
298 return (SO_DONTROUTE);
299 case LINUX_SO_BROADCAST:
300 return (SO_BROADCAST);
301 case LINUX_SO_SNDBUF:
302 return (SO_SNDBUF);
303 case LINUX_SO_RCVBUF:
304 return (SO_RCVBUF);
305 case LINUX_SO_KEEPALIVE:
306 return (SO_KEEPALIVE);
307 case LINUX_SO_OOBINLINE:
308 return (SO_OOBINLINE);
309 case LINUX_SO_LINGER:
310 return (SO_LINGER);
311 case LINUX_SO_PEERCRED:
312 return (LOCAL_PEERCRED);
313 case LINUX_SO_RCVLOWAT:
314 return (SO_RCVLOWAT);
315 case LINUX_SO_SNDLOWAT:
316 return (SO_SNDLOWAT);
317 case LINUX_SO_RCVTIMEO:
318 return (SO_RCVTIMEO);
319 case LINUX_SO_SNDTIMEO:
320 return (SO_SNDTIMEO);
321 case LINUX_SO_TIMESTAMP:
322 return (SO_TIMESTAMP);
323 case LINUX_SO_ACCEPTCONN:
324 return (SO_ACCEPTCONN);
325 }
326 return (-1);
327 }
328
329 static int
330 linux_to_bsd_tcp_sockopt(int opt)
331 {
332
333 switch (opt) {
334 case LINUX_TCP_NODELAY:
335 return (TCP_NODELAY);
336 case LINUX_TCP_MAXSEG:
337 return (TCP_MAXSEG);
338 case LINUX_TCP_KEEPIDLE:
339 return (TCP_KEEPIDLE);
340 case LINUX_TCP_KEEPINTVL:
341 return (TCP_KEEPINTVL);
342 case LINUX_TCP_KEEPCNT:
343 return (TCP_KEEPCNT);
344 case LINUX_TCP_MD5SIG:
345 return (TCP_MD5SIG);
346 }
347 return (-1);
348 }
349
350 static int
351 linux_to_bsd_msg_flags(int flags)
352 {
353 int ret_flags = 0;
354
355 if (flags & LINUX_MSG_OOB)
356 ret_flags |= MSG_OOB;
357 if (flags & LINUX_MSG_PEEK)
358 ret_flags |= MSG_PEEK;
359 if (flags & LINUX_MSG_DONTROUTE)
360 ret_flags |= MSG_DONTROUTE;
361 if (flags & LINUX_MSG_CTRUNC)
362 ret_flags |= MSG_CTRUNC;
363 if (flags & LINUX_MSG_TRUNC)
364 ret_flags |= MSG_TRUNC;
365 if (flags & LINUX_MSG_DONTWAIT)
366 ret_flags |= MSG_DONTWAIT;
367 if (flags & LINUX_MSG_EOR)
368 ret_flags |= MSG_EOR;
369 if (flags & LINUX_MSG_WAITALL)
370 ret_flags |= MSG_WAITALL;
371 if (flags & LINUX_MSG_NOSIGNAL)
372 ret_flags |= MSG_NOSIGNAL;
373 #if 0 /* not handled */
374 if (flags & LINUX_MSG_PROXY)
375 ;
376 if (flags & LINUX_MSG_FIN)
377 ;
378 if (flags & LINUX_MSG_SYN)
379 ;
380 if (flags & LINUX_MSG_CONFIRM)
381 ;
382 if (flags & LINUX_MSG_RST)
383 ;
384 if (flags & LINUX_MSG_ERRQUEUE)
385 ;
386 #endif
387 return ret_flags;
388 }
389
390 /*
391 * If bsd_to_linux_sockaddr() or linux_to_bsd_sockaddr() faults, then the
392 * native syscall will fault. Thus, we don't really need to check the
393 * return values for these functions.
394 */
395
396 static int
397 bsd_to_linux_sockaddr(struct sockaddr *arg)
398 {
399 struct sockaddr sa;
400 size_t sa_len = sizeof(struct sockaddr);
401 int error;
402
403 if ((error = copyin(arg, &sa, sa_len)))
404 return (error);
405
406 *(u_short *)&sa = sa.sa_family;
407
408 error = copyout(&sa, arg, sa_len);
409
410 return (error);
411 }
412
413 static int
414 linux_to_bsd_sockaddr(struct sockaddr *arg, int len)
415 {
416 struct sockaddr sa;
417 size_t sa_len = sizeof(struct sockaddr);
418 int error;
419
420 if ((error = copyin(arg, &sa, sa_len)))
421 return (error);
422
423 sa.sa_family = *(sa_family_t *)&sa;
424 sa.sa_len = len;
425
426 error = copyout(&sa, arg, sa_len);
427
428 return (error);
429 }
430
431
432 static int
433 linux_sa_put(struct osockaddr *osa)
434 {
435 struct osockaddr sa;
436 int error, bdom;
437
438 /*
439 * Only read/write the osockaddr family part, the rest is
440 * not changed.
441 */
442 error = copyin(osa, &sa, sizeof(sa.sa_family));
443 if (error)
444 return (error);
445
446 bdom = bsd_to_linux_domain(sa.sa_family);
447 if (bdom == -1)
448 return (EINVAL);
449
450 sa.sa_family = bdom;
451 error = copyout(&sa, osa, sizeof(sa.sa_family));
452 if (error)
453 return (error);
454
455 return (0);
456 }
457
458 static int
459 linux_to_bsd_cmsg_type(int cmsg_type)
460 {
461
462 switch (cmsg_type) {
463 case LINUX_SCM_RIGHTS:
464 return (SCM_RIGHTS);
465 case LINUX_SCM_CREDENTIALS:
466 return (SCM_CREDS);
467 }
468 return (-1);
469 }
470
471 static int
472 bsd_to_linux_cmsg_type(int cmsg_type)
473 {
474
475 switch (cmsg_type) {
476 case SCM_RIGHTS:
477 return (LINUX_SCM_RIGHTS);
478 case SCM_CREDS:
479 return (LINUX_SCM_CREDENTIALS);
480 }
481 return (-1);
482 }
483
484 static int
485 linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr)
486 {
487 if (lhdr->msg_controllen > INT_MAX)
488 return (ENOBUFS);
489
490 bhdr->msg_name = PTRIN(lhdr->msg_name);
491 bhdr->msg_namelen = lhdr->msg_namelen;
492 bhdr->msg_iov = PTRIN(lhdr->msg_iov);
493 bhdr->msg_iovlen = lhdr->msg_iovlen;
494 bhdr->msg_control = PTRIN(lhdr->msg_control);
495
496 /*
497 * msg_controllen is skipped since BSD and LINUX control messages
498 * are potentially different sizes (e.g. the cred structure used
499 * by SCM_CREDS is different between the two operating system).
500 *
501 * The caller can set it (if necessary) after converting all the
502 * control messages.
503 */
504
505 bhdr->msg_flags = linux_to_bsd_msg_flags(lhdr->msg_flags);
506 return (0);
507 }
508
509 static int
510 bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr)
511 {
512 lhdr->msg_name = PTROUT(bhdr->msg_name);
513 lhdr->msg_namelen = bhdr->msg_namelen;
514 lhdr->msg_iov = PTROUT(bhdr->msg_iov);
515 lhdr->msg_iovlen = bhdr->msg_iovlen;
516 lhdr->msg_control = PTROUT(bhdr->msg_control);
517
518 /*
519 * msg_controllen is skipped since BSD and LINUX control messages
520 * are potentially different sizes (e.g. the cred structure used
521 * by SCM_CREDS is different between the two operating system).
522 *
523 * The caller can set it (if necessary) after converting all the
524 * control messages.
525 */
526
527 /* msg_flags skipped */
528 return (0);
529 }
530
531 static int
532 linux_set_socket_flags(struct thread *td, int s, int flags)
533 {
534 int error;
535
536 if (flags & LINUX_SOCK_NONBLOCK) {
537 error = kern_fcntl(td, s, F_SETFL, O_NONBLOCK);
538 if (error)
539 return (error);
540 }
541 if (flags & LINUX_SOCK_CLOEXEC) {
542 error = kern_fcntl(td, s, F_SETFD, FD_CLOEXEC);
543 if (error)
544 return (error);
545 }
546 return (0);
547 }
548
549 static int
550 linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags,
551 struct mbuf *control, enum uio_seg segflg)
552 {
553 struct sockaddr *to;
554 int error;
555
556 if (mp->msg_name != NULL) {
557 error = linux_getsockaddr(&to, mp->msg_name, mp->msg_namelen);
558 if (error)
559 return (error);
560 mp->msg_name = to;
561 } else
562 to = NULL;
563
564 error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control,
565 segflg);
566
567 if (to)
568 free(to, M_SONAME);
569 return (error);
570 }
571
572 /* Return 0 if IP_HDRINCL is set for the given socket. */
573 static int
574 linux_check_hdrincl(struct thread *td, int s)
575 {
576 int error, optval, size_val;
577
578 size_val = sizeof(optval);
579 error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL,
580 &optval, UIO_SYSSPACE, &size_val);
581 if (error)
582 return (error);
583
584 return (optval == 0);
585 }
586
587 struct linux_sendto_args {
588 int s;
589 l_uintptr_t msg;
590 int len;
591 int flags;
592 l_uintptr_t to;
593 int tolen;
594 };
595
596 /*
597 * Updated sendto() when IP_HDRINCL is set:
598 * tweak endian-dependent fields in the IP packet.
599 */
600 static int
601 linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args)
602 {
603 /*
604 * linux_ip_copysize defines how many bytes we should copy
605 * from the beginning of the IP packet before we customize it for BSD.
606 * It should include all the fields we modify (ip_len and ip_off).
607 */
608 #define linux_ip_copysize 8
609
610 struct ip *packet;
611 struct msghdr msg;
612 struct iovec aiov[1];
613 int error;
614
615 /* Check that the packet isn't too big or too small. */
616 if (linux_args->len < linux_ip_copysize ||
617 linux_args->len > IP_MAXPACKET)
618 return (EINVAL);
619
620 packet = (struct ip *)malloc(linux_args->len, M_TEMP, M_WAITOK);
621
622 /* Make kernel copy of the packet to be sent */
623 if ((error = copyin(PTRIN(linux_args->msg), packet,
624 linux_args->len)))
625 goto goout;
626
627 /* Convert fields from Linux to BSD raw IP socket format */
628 packet->ip_len = linux_args->len;
629 packet->ip_off = ntohs(packet->ip_off);
630
631 /* Prepare the msghdr and iovec structures describing the new packet */
632 msg.msg_name = PTRIN(linux_args->to);
633 msg.msg_namelen = linux_args->tolen;
634 msg.msg_iov = aiov;
635 msg.msg_iovlen = 1;
636 msg.msg_control = NULL;
637 msg.msg_flags = 0;
638 aiov[0].iov_base = (char *)packet;
639 aiov[0].iov_len = linux_args->len;
640 error = linux_sendit(td, linux_args->s, &msg, linux_args->flags,
641 NULL, UIO_SYSSPACE);
642 goout:
643 free(packet, M_TEMP);
644 return (error);
645 }
646
647 struct linux_socket_args {
648 int domain;
649 int type;
650 int protocol;
651 };
652
653 static int
654 linux_socket(struct thread *td, struct linux_socket_args *args)
655 {
656 struct socket_args /* {
657 int domain;
658 int type;
659 int protocol;
660 } */ bsd_args;
661 int retval_socket, socket_flags;
662
663 bsd_args.protocol = args->protocol;
664 socket_flags = args->type & ~LINUX_SOCK_TYPE_MASK;
665 if (socket_flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK))
666 return (EINVAL);
667 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK;
668 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX)
669 return (EINVAL);
670 bsd_args.domain = linux_to_bsd_domain(args->domain);
671 if (bsd_args.domain == -1)
672 return (EAFNOSUPPORT);
673
674 retval_socket = sys_socket(td, &bsd_args);
675 if (retval_socket)
676 return (retval_socket);
677
678 retval_socket = linux_set_socket_flags(td, td->td_retval[0],
679 socket_flags);
680 if (retval_socket) {
681 (void)kern_close(td, td->td_retval[0]);
682 goto out;
683 }
684
685 if (bsd_args.type == SOCK_RAW
686 && (bsd_args.protocol == IPPROTO_RAW || bsd_args.protocol == 0)
687 && bsd_args.domain == PF_INET) {
688 /* It's a raw IP socket: set the IP_HDRINCL option. */
689 int hdrincl;
690
691 hdrincl = 1;
692 /* We ignore any error returned by kern_setsockopt() */
693 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL,
694 &hdrincl, UIO_SYSSPACE, sizeof(hdrincl));
695 }
696 #ifdef INET6
697 /*
698 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default
699 * and some apps depend on this. So, set V6ONLY to 0 for Linux apps.
700 * For simplicity we do this unconditionally of the net.inet6.ip6.v6only
701 * sysctl value.
702 */
703 if (bsd_args.domain == PF_INET6) {
704 int v6only;
705
706 v6only = 0;
707 /* We ignore any error returned by setsockopt() */
708 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY,
709 &v6only, UIO_SYSSPACE, sizeof(v6only));
710 }
711 #endif
712
713 out:
714 return (retval_socket);
715 }
716
717 struct linux_bind_args {
718 int s;
719 l_uintptr_t name;
720 int namelen;
721 };
722
723 static int
724 linux_bind(struct thread *td, struct linux_bind_args *args)
725 {
726 struct sockaddr *sa;
727 int error;
728
729 error = linux_getsockaddr(&sa, PTRIN(args->name),
730 args->namelen);
731 if (error)
732 return (error);
733
734 error = kern_bind(td, args->s, sa);
735 free(sa, M_SONAME);
736 if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in))
737 return (EINVAL);
738 return (error);
739 }
740
741 struct linux_connect_args {
742 int s;
743 l_uintptr_t name;
744 int namelen;
745 };
746 int linux_connect(struct thread *, struct linux_connect_args *);
747
748 int
749 linux_connect(struct thread *td, struct linux_connect_args *args)
750 {
751 struct socket *so;
752 struct sockaddr *sa;
753 u_int fflag;
754 int error;
755
756 error = linux_getsockaddr(&sa, (struct osockaddr *)PTRIN(args->name),
757 args->namelen);
758 if (error)
759 return (error);
760
761 error = kern_connect(td, args->s, sa);
762 free(sa, M_SONAME);
763 if (error != EISCONN)
764 return (error);
765
766 /*
767 * Linux doesn't return EISCONN the first time it occurs,
768 * when on a non-blocking socket. Instead it returns the
769 * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD.
770 *
771 * XXXRW: Instead of using fgetsock(), check that it is a
772 * socket and use the file descriptor reference instead of
773 * creating a new one.
774 */
775 error = fgetsock(td, args->s, CAP_CONNECT, &so, &fflag);
776 if (error == 0) {
777 error = EISCONN;
778 if (fflag & FNONBLOCK) {
779 SOCK_LOCK(so);
780 if (so->so_emuldata == 0)
781 error = so->so_error;
782 so->so_emuldata = (void *)1;
783 SOCK_UNLOCK(so);
784 }
785 fputsock(so);
786 }
787 return (error);
788 }
789
790 struct linux_listen_args {
791 int s;
792 int backlog;
793 };
794
795 static int
796 linux_listen(struct thread *td, struct linux_listen_args *args)
797 {
798 struct listen_args /* {
799 int s;
800 int backlog;
801 } */ bsd_args;
802
803 bsd_args.s = args->s;
804 bsd_args.backlog = args->backlog;
805 return (sys_listen(td, &bsd_args));
806 }
807
808 static int
809 linux_accept_common(struct thread *td, int s, l_uintptr_t addr,
810 l_uintptr_t namelen, int flags)
811 {
812 struct accept_args /* {
813 int s;
814 struct sockaddr * __restrict name;
815 socklen_t * __restrict anamelen;
816 } */ bsd_args;
817 int error;
818
819 if (flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK))
820 return (EINVAL);
821
822 bsd_args.s = s;
823 /* XXX: */
824 bsd_args.name = (struct sockaddr * __restrict)PTRIN(addr);
825 bsd_args.anamelen = PTRIN(namelen);/* XXX */
826 error = sys_accept(td, &bsd_args);
827 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.name);
828 if (error) {
829 if (error == EFAULT && namelen != sizeof(struct sockaddr_in))
830 return (EINVAL);
831 return (error);
832 }
833
834 /*
835 * linux appears not to copy flags from the parent socket to the
836 * accepted one, so we must clear the flags in the new descriptor
837 * and apply the requested flags.
838 */
839 error = kern_fcntl(td, td->td_retval[0], F_SETFL, 0);
840 if (error)
841 goto out;
842 error = linux_set_socket_flags(td, td->td_retval[0], flags);
843 if (error)
844 goto out;
845 if (addr)
846 error = linux_sa_put(PTRIN(addr));
847
848 out:
849 if (error) {
850 (void)kern_close(td, td->td_retval[0]);
851 td->td_retval[0] = 0;
852 }
853 return (error);
854 }
855
856 struct linux_accept_args {
857 int s;
858 l_uintptr_t addr;
859 l_uintptr_t namelen;
860 };
861
862 static int
863 linux_accept(struct thread *td, struct linux_accept_args *args)
864 {
865
866 return (linux_accept_common(td, args->s, args->addr,
867 args->namelen, 0));
868 }
869
870 struct linux_accept4_args {
871 int s;
872 l_uintptr_t addr;
873 l_uintptr_t namelen;
874 int flags;
875 };
876
877 static int
878 linux_accept4(struct thread *td, struct linux_accept4_args *args)
879 {
880
881 return (linux_accept_common(td, args->s, args->addr,
882 args->namelen, args->flags));
883 }
884
885 struct linux_getsockname_args {
886 int s;
887 l_uintptr_t addr;
888 l_uintptr_t namelen;
889 };
890
891 static int
892 linux_getsockname(struct thread *td, struct linux_getsockname_args *args)
893 {
894 struct getsockname_args /* {
895 int fdes;
896 struct sockaddr * __restrict asa;
897 socklen_t * __restrict alen;
898 } */ bsd_args;
899 int error;
900
901 bsd_args.fdes = args->s;
902 /* XXX: */
903 bsd_args.asa = (struct sockaddr * __restrict)PTRIN(args->addr);
904 bsd_args.alen = PTRIN(args->namelen); /* XXX */
905 error = sys_getsockname(td, &bsd_args);
906 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa);
907 if (error)
908 return (error);
909 error = linux_sa_put(PTRIN(args->addr));
910 if (error)
911 return (error);
912 return (0);
913 }
914
915 struct linux_getpeername_args {
916 int s;
917 l_uintptr_t addr;
918 l_uintptr_t namelen;
919 };
920
921 static int
922 linux_getpeername(struct thread *td, struct linux_getpeername_args *args)
923 {
924 struct getpeername_args /* {
925 int fdes;
926 caddr_t asa;
927 int *alen;
928 } */ bsd_args;
929 int error;
930
931 bsd_args.fdes = args->s;
932 bsd_args.asa = (struct sockaddr *)PTRIN(args->addr);
933 bsd_args.alen = (int *)PTRIN(args->namelen);
934 error = sys_getpeername(td, &bsd_args);
935 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa);
936 if (error)
937 return (error);
938 error = linux_sa_put(PTRIN(args->addr));
939 if (error)
940 return (error);
941 return (0);
942 }
943
944 struct linux_socketpair_args {
945 int domain;
946 int type;
947 int protocol;
948 l_uintptr_t rsv;
949 };
950
951 static int
952 linux_socketpair(struct thread *td, struct linux_socketpair_args *args)
953 {
954 struct socketpair_args /* {
955 int domain;
956 int type;
957 int protocol;
958 int *rsv;
959 } */ bsd_args;
960 int error, socket_flags;
961 int sv[2];
962
963 bsd_args.domain = linux_to_bsd_domain(args->domain);
964 if (bsd_args.domain != PF_LOCAL)
965 return (EAFNOSUPPORT);
966
967 socket_flags = args->type & ~LINUX_SOCK_TYPE_MASK;
968 if (socket_flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK))
969 return (EINVAL);
970 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK;
971 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX)
972 return (EINVAL);
973
974 if (args->protocol != 0 && args->protocol != PF_UNIX)
975
976 /*
977 * Use of PF_UNIX as protocol argument is not right,
978 * but Linux does it.
979 * Do not map PF_UNIX as its Linux value is identical
980 * to FreeBSD one.
981 */
982 return (EPROTONOSUPPORT);
983 else
984 bsd_args.protocol = 0;
985 bsd_args.rsv = (int *)PTRIN(args->rsv);
986 error = kern_socketpair(td, bsd_args.domain, bsd_args.type,
987 bsd_args.protocol, sv);
988 if (error)
989 return (error);
990 error = linux_set_socket_flags(td, sv[0], socket_flags);
991 if (error)
992 goto out;
993 error = linux_set_socket_flags(td, sv[1], socket_flags);
994 if (error)
995 goto out;
996
997 error = copyout(sv, bsd_args.rsv, 2 * sizeof(int));
998
999 out:
1000 if (error) {
1001 (void)kern_close(td, sv[0]);
1002 (void)kern_close(td, sv[1]);
1003 }
1004 return (error);
1005 }
1006
1007 struct linux_send_args {
1008 int s;
1009 l_uintptr_t msg;
1010 int len;
1011 int flags;
1012 };
1013
1014 static int
1015 linux_send(struct thread *td, struct linux_send_args *args)
1016 {
1017 struct sendto_args /* {
1018 int s;
1019 caddr_t buf;
1020 int len;
1021 int flags;
1022 caddr_t to;
1023 int tolen;
1024 } */ bsd_args;
1025
1026 bsd_args.s = args->s;
1027 bsd_args.buf = (caddr_t)PTRIN(args->msg);
1028 bsd_args.len = args->len;
1029 bsd_args.flags = args->flags;
1030 bsd_args.to = NULL;
1031 bsd_args.tolen = 0;
1032 return sys_sendto(td, &bsd_args);
1033 }
1034
1035 struct linux_recv_args {
1036 int s;
1037 l_uintptr_t msg;
1038 int len;
1039 int flags;
1040 };
1041
1042 static int
1043 linux_recv(struct thread *td, struct linux_recv_args *args)
1044 {
1045 struct recvfrom_args /* {
1046 int s;
1047 caddr_t buf;
1048 int len;
1049 int flags;
1050 struct sockaddr *from;
1051 socklen_t fromlenaddr;
1052 } */ bsd_args;
1053
1054 bsd_args.s = args->s;
1055 bsd_args.buf = (caddr_t)PTRIN(args->msg);
1056 bsd_args.len = args->len;
1057 bsd_args.flags = linux_to_bsd_msg_flags(args->flags);
1058 bsd_args.from = NULL;
1059 bsd_args.fromlenaddr = 0;
1060 return (sys_recvfrom(td, &bsd_args));
1061 }
1062
1063 static int
1064 linux_sendto(struct thread *td, struct linux_sendto_args *args)
1065 {
1066 struct msghdr msg;
1067 struct iovec aiov;
1068 int error;
1069
1070 if (linux_check_hdrincl(td, args->s) == 0)
1071 /* IP_HDRINCL set, tweak the packet before sending */
1072 return (linux_sendto_hdrincl(td, args));
1073
1074 msg.msg_name = PTRIN(args->to);
1075 msg.msg_namelen = args->tolen;
1076 msg.msg_iov = &aiov;
1077 msg.msg_iovlen = 1;
1078 msg.msg_control = NULL;
1079 msg.msg_flags = 0;
1080 aiov.iov_base = PTRIN(args->msg);
1081 aiov.iov_len = args->len;
1082 error = linux_sendit(td, args->s, &msg, args->flags, NULL,
1083 UIO_USERSPACE);
1084 return (error);
1085 }
1086
1087 struct linux_recvfrom_args {
1088 int s;
1089 l_uintptr_t buf;
1090 int len;
1091 int flags;
1092 l_uintptr_t from;
1093 l_uintptr_t fromlen;
1094 };
1095
1096 static int
1097 linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args)
1098 {
1099 struct recvfrom_args /* {
1100 int s;
1101 caddr_t buf;
1102 size_t len;
1103 int flags;
1104 struct sockaddr * __restrict from;
1105 socklen_t * __restrict fromlenaddr;
1106 } */ bsd_args;
1107 size_t len;
1108 int error;
1109
1110 if ((error = copyin(PTRIN(args->fromlen), &len, sizeof(size_t))))
1111 return (error);
1112
1113 bsd_args.s = args->s;
1114 bsd_args.buf = PTRIN(args->buf);
1115 bsd_args.len = args->len;
1116 bsd_args.flags = linux_to_bsd_msg_flags(args->flags);
1117 /* XXX: */
1118 bsd_args.from = (struct sockaddr * __restrict)PTRIN(args->from);
1119 bsd_args.fromlenaddr = PTRIN(args->fromlen);/* XXX */
1120
1121 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.from, len);
1122 error = sys_recvfrom(td, &bsd_args);
1123 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.from);
1124
1125 if (error)
1126 return (error);
1127 if (args->from) {
1128 error = linux_sa_put((struct osockaddr *)
1129 PTRIN(args->from));
1130 if (error)
1131 return (error);
1132 }
1133 return (0);
1134 }
1135
1136 struct linux_sendmsg_args {
1137 int s;
1138 l_uintptr_t msg;
1139 int flags;
1140 };
1141
1142 static int
1143 linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args)
1144 {
1145 struct cmsghdr *cmsg;
1146 struct cmsgcred cmcred;
1147 struct mbuf *control;
1148 struct msghdr msg;
1149 struct l_cmsghdr linux_cmsg;
1150 struct l_cmsghdr *ptr_cmsg;
1151 struct l_msghdr linux_msg;
1152 struct iovec *iov;
1153 socklen_t datalen;
1154 struct sockaddr *sa;
1155 sa_family_t sa_family;
1156 void *data;
1157 int error;
1158
1159 error = copyin(PTRIN(args->msg), &linux_msg, sizeof(linux_msg));
1160 if (error)
1161 return (error);
1162
1163 /*
1164 * Some Linux applications (ping) define a non-NULL control data
1165 * pointer, but a msg_controllen of 0, which is not allowed in the
1166 * FreeBSD system call interface. NULL the msg_control pointer in
1167 * order to handle this case. This should be checked, but allows the
1168 * Linux ping to work.
1169 */
1170 if (PTRIN(linux_msg.msg_control) != NULL && linux_msg.msg_controllen == 0)
1171 linux_msg.msg_control = PTROUT(NULL);
1172
1173 error = linux_to_bsd_msghdr(&msg, &linux_msg);
1174 if (error)
1175 return (error);
1176
1177 #ifdef COMPAT_LINUX32
1178 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen,
1179 &iov, EMSGSIZE);
1180 #else
1181 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
1182 #endif
1183 if (error)
1184 return (error);
1185
1186 control = NULL;
1187 cmsg = NULL;
1188
1189 if ((ptr_cmsg = LINUX_CMSG_FIRSTHDR(&linux_msg)) != NULL) {
1190 error = kern_getsockname(td, args->s, &sa, &datalen);
1191 if (error)
1192 goto bad;
1193 sa_family = sa->sa_family;
1194 free(sa, M_SONAME);
1195
1196 error = ENOBUFS;
1197 cmsg = malloc(CMSG_HDRSZ, M_TEMP, M_WAITOK | M_ZERO);
1198 control = m_get(M_WAIT, MT_CONTROL);
1199 if (control == NULL)
1200 goto bad;
1201
1202 do {
1203 error = copyin(ptr_cmsg, &linux_cmsg,
1204 sizeof(struct l_cmsghdr));
1205 if (error)
1206 goto bad;
1207
1208 error = EINVAL;
1209 if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr))
1210 goto bad;
1211
1212 /*
1213 * Now we support only SCM_RIGHTS and SCM_CRED,
1214 * so return EINVAL in any other cmsg_type
1215 */
1216 cmsg->cmsg_type =
1217 linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type);
1218 cmsg->cmsg_level =
1219 linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level);
1220 if (cmsg->cmsg_type == -1
1221 || cmsg->cmsg_level != SOL_SOCKET)
1222 goto bad;
1223
1224 /*
1225 * Some applications (e.g. pulseaudio) attempt to
1226 * send ancillary data even if the underlying protocol
1227 * doesn't support it which is not allowed in the
1228 * FreeBSD system call interface.
1229 */
1230 if (sa_family != AF_UNIX)
1231 continue;
1232
1233 data = LINUX_CMSG_DATA(ptr_cmsg);
1234 datalen = linux_cmsg.cmsg_len - L_CMSG_HDRSZ;
1235
1236 switch (cmsg->cmsg_type)
1237 {
1238 case SCM_RIGHTS:
1239 break;
1240
1241 case SCM_CREDS:
1242 data = &cmcred;
1243 datalen = sizeof(cmcred);
1244
1245 /*
1246 * The lower levels will fill in the structure
1247 */
1248 bzero(data, datalen);
1249 break;
1250 }
1251
1252 cmsg->cmsg_len = CMSG_LEN(datalen);
1253
1254 error = ENOBUFS;
1255 if (!m_append(control, CMSG_HDRSZ, (c_caddr_t)cmsg))
1256 goto bad;
1257 if (!m_append(control, datalen, (c_caddr_t)data))
1258 goto bad;
1259 } while ((ptr_cmsg = LINUX_CMSG_NXTHDR(&linux_msg, ptr_cmsg)));
1260
1261 if (m_length(control, NULL) == 0) {
1262 m_freem(control);
1263 control = NULL;
1264 }
1265 }
1266
1267 msg.msg_iov = iov;
1268 msg.msg_flags = 0;
1269 error = linux_sendit(td, args->s, &msg, args->flags, control,
1270 UIO_USERSPACE);
1271
1272 bad:
1273 free(iov, M_IOV);
1274 if (cmsg)
1275 free(cmsg, M_TEMP);
1276 return (error);
1277 }
1278
1279 struct linux_recvmsg_args {
1280 int s;
1281 l_uintptr_t msg;
1282 int flags;
1283 };
1284
1285 static int
1286 linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args)
1287 {
1288 struct cmsghdr *cm;
1289 struct cmsgcred *cmcred;
1290 struct msghdr msg;
1291 struct l_cmsghdr *linux_cmsg = NULL;
1292 struct l_ucred linux_ucred;
1293 socklen_t datalen, outlen;
1294 struct l_msghdr linux_msg;
1295 struct iovec *iov, *uiov;
1296 struct mbuf *control = NULL;
1297 struct mbuf **controlp;
1298 caddr_t outbuf;
1299 void *data;
1300 int error, i, fd, fds, *fdp;
1301
1302 error = copyin(PTRIN(args->msg), &linux_msg, sizeof(linux_msg));
1303 if (error)
1304 return (error);
1305
1306 error = linux_to_bsd_msghdr(&msg, &linux_msg);
1307 if (error)
1308 return (error);
1309
1310 #ifdef COMPAT_LINUX32
1311 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen,
1312 &iov, EMSGSIZE);
1313 #else
1314 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
1315 #endif
1316 if (error)
1317 return (error);
1318
1319 if (msg.msg_name) {
1320 error = linux_to_bsd_sockaddr((struct sockaddr *)msg.msg_name,
1321 msg.msg_namelen);
1322 if (error)
1323 goto bad;
1324 }
1325
1326 uiov = msg.msg_iov;
1327 msg.msg_iov = iov;
1328 controlp = (msg.msg_control != NULL) ? &control : NULL;
1329 error = kern_recvit(td, args->s, &msg, UIO_USERSPACE, controlp);
1330 msg.msg_iov = uiov;
1331 if (error)
1332 goto bad;
1333
1334 error = bsd_to_linux_msghdr(&msg, &linux_msg);
1335 if (error)
1336 goto bad;
1337
1338 if (linux_msg.msg_name) {
1339 error = bsd_to_linux_sockaddr((struct sockaddr *)
1340 PTRIN(linux_msg.msg_name));
1341 if (error)
1342 goto bad;
1343 }
1344 if (linux_msg.msg_name && linux_msg.msg_namelen > 2) {
1345 error = linux_sa_put(PTRIN(linux_msg.msg_name));
1346 if (error)
1347 goto bad;
1348 }
1349
1350 outbuf = PTRIN(linux_msg.msg_control);
1351 outlen = 0;
1352
1353 if (control) {
1354 linux_cmsg = malloc(L_CMSG_HDRSZ, M_TEMP, M_WAITOK | M_ZERO);
1355
1356 msg.msg_control = mtod(control, struct cmsghdr *);
1357 msg.msg_controllen = control->m_len;
1358
1359 cm = CMSG_FIRSTHDR(&msg);
1360
1361 while (cm != NULL) {
1362 linux_cmsg->cmsg_type =
1363 bsd_to_linux_cmsg_type(cm->cmsg_type);
1364 linux_cmsg->cmsg_level =
1365 bsd_to_linux_sockopt_level(cm->cmsg_level);
1366 if (linux_cmsg->cmsg_type == -1
1367 || cm->cmsg_level != SOL_SOCKET)
1368 {
1369 error = EINVAL;
1370 goto bad;
1371 }
1372
1373 data = CMSG_DATA(cm);
1374 datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data;
1375
1376 switch (cm->cmsg_type)
1377 {
1378 case SCM_RIGHTS:
1379 if (args->flags & LINUX_MSG_CMSG_CLOEXEC) {
1380 fds = datalen / sizeof(int);
1381 fdp = data;
1382 for (i = 0; i < fds; i++) {
1383 fd = *fdp++;
1384 (void)kern_fcntl(td, fd,
1385 F_SETFD, FD_CLOEXEC);
1386 }
1387 }
1388 break;
1389
1390 case SCM_CREDS:
1391 /*
1392 * Currently LOCAL_CREDS is never in
1393 * effect for Linux so no need to worry
1394 * about sockcred
1395 */
1396 if (datalen != sizeof(*cmcred)) {
1397 error = EMSGSIZE;
1398 goto bad;
1399 }
1400 cmcred = (struct cmsgcred *)data;
1401 bzero(&linux_ucred, sizeof(linux_ucred));
1402 linux_ucred.pid = cmcred->cmcred_pid;
1403 linux_ucred.uid = cmcred->cmcred_uid;
1404 linux_ucred.gid = cmcred->cmcred_gid;
1405 data = &linux_ucred;
1406 datalen = sizeof(linux_ucred);
1407 break;
1408 }
1409
1410 if (outlen + LINUX_CMSG_LEN(datalen) >
1411 linux_msg.msg_controllen) {
1412 if (outlen == 0) {
1413 error = EMSGSIZE;
1414 goto bad;
1415 } else {
1416 linux_msg.msg_flags |=
1417 LINUX_MSG_CTRUNC;
1418 goto out;
1419 }
1420 }
1421
1422 linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen);
1423
1424 error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ);
1425 if (error)
1426 goto bad;
1427 outbuf += L_CMSG_HDRSZ;
1428
1429 error = copyout(data, outbuf, datalen);
1430 if (error)
1431 goto bad;
1432
1433 outbuf += LINUX_CMSG_ALIGN(datalen);
1434 outlen += LINUX_CMSG_LEN(datalen);
1435
1436 cm = CMSG_NXTHDR(&msg, cm);
1437 }
1438 }
1439
1440 out:
1441 linux_msg.msg_controllen = outlen;
1442 error = copyout(&linux_msg, PTRIN(args->msg), sizeof(linux_msg));
1443
1444 bad:
1445 free(iov, M_IOV);
1446 if (control != NULL)
1447 m_freem(control);
1448 if (linux_cmsg != NULL)
1449 free(linux_cmsg, M_TEMP);
1450
1451 return (error);
1452 }
1453
1454 struct linux_shutdown_args {
1455 int s;
1456 int how;
1457 };
1458
1459 static int
1460 linux_shutdown(struct thread *td, struct linux_shutdown_args *args)
1461 {
1462 struct shutdown_args /* {
1463 int s;
1464 int how;
1465 } */ bsd_args;
1466
1467 bsd_args.s = args->s;
1468 bsd_args.how = args->how;
1469 return (sys_shutdown(td, &bsd_args));
1470 }
1471
1472 struct linux_setsockopt_args {
1473 int s;
1474 int level;
1475 int optname;
1476 l_uintptr_t optval;
1477 int optlen;
1478 };
1479
1480 static int
1481 linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args)
1482 {
1483 struct setsockopt_args /* {
1484 int s;
1485 int level;
1486 int name;
1487 caddr_t val;
1488 int valsize;
1489 } */ bsd_args;
1490 l_timeval linux_tv;
1491 struct timeval tv;
1492 int error, name;
1493
1494 bsd_args.s = args->s;
1495 bsd_args.level = linux_to_bsd_sockopt_level(args->level);
1496 switch (bsd_args.level) {
1497 case SOL_SOCKET:
1498 name = linux_to_bsd_so_sockopt(args->optname);
1499 switch (name) {
1500 case SO_RCVTIMEO:
1501 /* FALLTHROUGH */
1502 case SO_SNDTIMEO:
1503 error = copyin(PTRIN(args->optval), &linux_tv,
1504 sizeof(linux_tv));
1505 if (error)
1506 return (error);
1507 tv.tv_sec = linux_tv.tv_sec;
1508 tv.tv_usec = linux_tv.tv_usec;
1509 return (kern_setsockopt(td, args->s, bsd_args.level,
1510 name, &tv, UIO_SYSSPACE, sizeof(tv)));
1511 /* NOTREACHED */
1512 break;
1513 default:
1514 break;
1515 }
1516 break;
1517 case IPPROTO_IP:
1518 name = linux_to_bsd_ip_sockopt(args->optname);
1519 break;
1520 case IPPROTO_TCP:
1521 name = linux_to_bsd_tcp_sockopt(args->optname);
1522 break;
1523 default:
1524 name = -1;
1525 break;
1526 }
1527 if (name == -1)
1528 return (ENOPROTOOPT);
1529
1530 bsd_args.name = name;
1531 bsd_args.val = PTRIN(args->optval);
1532 bsd_args.valsize = args->optlen;
1533
1534 if (name == IPV6_NEXTHOP) {
1535 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val,
1536 bsd_args.valsize);
1537 error = sys_setsockopt(td, &bsd_args);
1538 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val);
1539 } else
1540 error = sys_setsockopt(td, &bsd_args);
1541
1542 return (error);
1543 }
1544
1545 struct linux_getsockopt_args {
1546 int s;
1547 int level;
1548 int optname;
1549 l_uintptr_t optval;
1550 l_uintptr_t optlen;
1551 };
1552
1553 static int
1554 linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args)
1555 {
1556 struct getsockopt_args /* {
1557 int s;
1558 int level;
1559 int name;
1560 caddr_t val;
1561 int *avalsize;
1562 } */ bsd_args;
1563 l_timeval linux_tv;
1564 struct timeval tv;
1565 socklen_t tv_len, xulen;
1566 struct xucred xu;
1567 struct l_ucred lxu;
1568 int error, name;
1569
1570 bsd_args.s = args->s;
1571 bsd_args.level = linux_to_bsd_sockopt_level(args->level);
1572 switch (bsd_args.level) {
1573 case SOL_SOCKET:
1574 name = linux_to_bsd_so_sockopt(args->optname);
1575 switch (name) {
1576 case SO_RCVTIMEO:
1577 /* FALLTHROUGH */
1578 case SO_SNDTIMEO:
1579 tv_len = sizeof(tv);
1580 error = kern_getsockopt(td, args->s, bsd_args.level,
1581 name, &tv, UIO_SYSSPACE, &tv_len);
1582 if (error)
1583 return (error);
1584 linux_tv.tv_sec = tv.tv_sec;
1585 linux_tv.tv_usec = tv.tv_usec;
1586 return (copyout(&linux_tv, PTRIN(args->optval),
1587 sizeof(linux_tv)));
1588 /* NOTREACHED */
1589 break;
1590 case LOCAL_PEERCRED:
1591 if (args->optlen != sizeof(lxu))
1592 return (EINVAL);
1593 xulen = sizeof(xu);
1594 error = kern_getsockopt(td, args->s, bsd_args.level,
1595 name, &xu, UIO_SYSSPACE, &xulen);
1596 if (error)
1597 return (error);
1598 /*
1599 * XXX Use 0 for pid as the FreeBSD does not cache peer pid.
1600 */
1601 lxu.pid = 0;
1602 lxu.uid = xu.cr_uid;
1603 lxu.gid = xu.cr_gid;
1604 return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu)));
1605 /* NOTREACHED */
1606 break;
1607 default:
1608 break;
1609 }
1610 break;
1611 case IPPROTO_IP:
1612 name = linux_to_bsd_ip_sockopt(args->optname);
1613 break;
1614 case IPPROTO_TCP:
1615 name = linux_to_bsd_tcp_sockopt(args->optname);
1616 break;
1617 default:
1618 name = -1;
1619 break;
1620 }
1621 if (name == -1)
1622 return (EINVAL);
1623
1624 bsd_args.name = name;
1625 bsd_args.val = PTRIN(args->optval);
1626 bsd_args.avalsize = PTRIN(args->optlen);
1627
1628 if (name == IPV6_NEXTHOP) {
1629 error = sys_getsockopt(td, &bsd_args);
1630 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val);
1631 } else
1632 error = sys_getsockopt(td, &bsd_args);
1633
1634 return (error);
1635 }
1636
1637 /* Argument list sizes for linux_socketcall */
1638
1639 #define LINUX_AL(x) ((x) * sizeof(l_ulong))
1640
1641 static const unsigned char lxs_args[] = {
1642 LINUX_AL(0) /* unused*/, LINUX_AL(3) /* socket */,
1643 LINUX_AL(3) /* bind */, LINUX_AL(3) /* connect */,
1644 LINUX_AL(2) /* listen */, LINUX_AL(3) /* accept */,
1645 LINUX_AL(3) /* getsockname */, LINUX_AL(3) /* getpeername */,
1646 LINUX_AL(4) /* socketpair */, LINUX_AL(4) /* send */,
1647 LINUX_AL(4) /* recv */, LINUX_AL(6) /* sendto */,
1648 LINUX_AL(6) /* recvfrom */, LINUX_AL(2) /* shutdown */,
1649 LINUX_AL(5) /* setsockopt */, LINUX_AL(5) /* getsockopt */,
1650 LINUX_AL(3) /* sendmsg */, LINUX_AL(3) /* recvmsg */,
1651 LINUX_AL(4) /* accept4 */
1652 };
1653
1654 #define LINUX_AL_SIZE sizeof(lxs_args) / sizeof(lxs_args[0]) - 1
1655
1656 int
1657 linux_socketcall(struct thread *td, struct linux_socketcall_args *args)
1658 {
1659 l_ulong a[6];
1660 void *arg;
1661 int error;
1662
1663 if (args->what < LINUX_SOCKET || args->what > LINUX_AL_SIZE)
1664 return (EINVAL);
1665 error = copyin(PTRIN(args->args), a, lxs_args[args->what]);
1666 if (error)
1667 return (error);
1668
1669 arg = a;
1670 switch (args->what) {
1671 case LINUX_SOCKET:
1672 return (linux_socket(td, arg));
1673 case LINUX_BIND:
1674 return (linux_bind(td, arg));
1675 case LINUX_CONNECT:
1676 return (linux_connect(td, arg));
1677 case LINUX_LISTEN:
1678 return (linux_listen(td, arg));
1679 case LINUX_ACCEPT:
1680 return (linux_accept(td, arg));
1681 case LINUX_GETSOCKNAME:
1682 return (linux_getsockname(td, arg));
1683 case LINUX_GETPEERNAME:
1684 return (linux_getpeername(td, arg));
1685 case LINUX_SOCKETPAIR:
1686 return (linux_socketpair(td, arg));
1687 case LINUX_SEND:
1688 return (linux_send(td, arg));
1689 case LINUX_RECV:
1690 return (linux_recv(td, arg));
1691 case LINUX_SENDTO:
1692 return (linux_sendto(td, arg));
1693 case LINUX_RECVFROM:
1694 return (linux_recvfrom(td, arg));
1695 case LINUX_SHUTDOWN:
1696 return (linux_shutdown(td, arg));
1697 case LINUX_SETSOCKOPT:
1698 return (linux_setsockopt(td, arg));
1699 case LINUX_GETSOCKOPT:
1700 return (linux_getsockopt(td, arg));
1701 case LINUX_SENDMSG:
1702 return (linux_sendmsg(td, arg));
1703 case LINUX_RECVMSG:
1704 return (linux_recvmsg(td, arg));
1705 case LINUX_ACCEPT4:
1706 return (linux_accept4(td, arg));
1707 }
1708
1709 uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what);
1710 return (ENOSYS);
1711 }
Cache object: e5362e349dc49ffd08901b1b50b80071
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