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/10.3/sys/compat/linux/linux_socket.c 294529 2016-01-21 19:19:24Z dchagin $");
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/capsicum.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_file.h>
74 #include <compat/linux/linux_socket.h>
75 #include <compat/linux/linux_timer.h>
76 #include <compat/linux/linux_util.h>
77
78 static int linux_to_bsd_domain(int);
79 static int linux_sendmsg_common(struct thread *, l_int, struct l_msghdr *,
80 l_uint);
81 static int linux_recvmsg_common(struct thread *, l_int, struct l_msghdr *,
82 l_uint, struct msghdr *);
83 static int linux_set_socket_flags(int, int *);
84
85 /*
86 * Reads a linux sockaddr and does any necessary translation.
87 * Linux sockaddrs don't have a length field, only a family.
88 * Copy the osockaddr structure pointed to by osa to kernel, adjust
89 * family and convert to sockaddr.
90 */
91 static int
92 linux_getsockaddr(struct sockaddr **sap, const struct osockaddr *osa, int salen)
93 {
94 struct sockaddr *sa;
95 struct osockaddr *kosa;
96 #ifdef INET6
97 struct sockaddr_in6 *sin6;
98 int oldv6size;
99 #endif
100 char *name;
101 int bdom, error, hdrlen, namelen;
102
103 if (salen < 2 || salen > UCHAR_MAX || !osa)
104 return (EINVAL);
105
106 #ifdef INET6
107 oldv6size = 0;
108 /*
109 * Check for old (pre-RFC2553) sockaddr_in6. We may accept it
110 * if it's a v4-mapped address, so reserve the proper space
111 * for it.
112 */
113 if (salen == sizeof(struct sockaddr_in6) - sizeof(uint32_t)) {
114 salen += sizeof(uint32_t);
115 oldv6size = 1;
116 }
117 #endif
118
119 kosa = malloc(salen, M_SONAME, M_WAITOK);
120
121 if ((error = copyin(osa, kosa, salen)))
122 goto out;
123
124 bdom = linux_to_bsd_domain(kosa->sa_family);
125 if (bdom == -1) {
126 error = EAFNOSUPPORT;
127 goto out;
128 }
129
130 #ifdef INET6
131 /*
132 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6,
133 * which lacks the scope id compared with RFC2553 one. If we detect
134 * the situation, reject the address and write a message to system log.
135 *
136 * Still accept addresses for which the scope id is not used.
137 */
138 if (oldv6size) {
139 if (bdom == AF_INET6) {
140 sin6 = (struct sockaddr_in6 *)kosa;
141 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) ||
142 (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
143 !IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
144 !IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) &&
145 !IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
146 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) {
147 sin6->sin6_scope_id = 0;
148 } else {
149 log(LOG_DEBUG,
150 "obsolete pre-RFC2553 sockaddr_in6 rejected\n");
151 error = EINVAL;
152 goto out;
153 }
154 } else
155 salen -= sizeof(uint32_t);
156 }
157 #endif
158 if (bdom == AF_INET) {
159 if (salen < sizeof(struct sockaddr_in)) {
160 error = EINVAL;
161 goto out;
162 }
163 salen = sizeof(struct sockaddr_in);
164 }
165
166 if (bdom == AF_LOCAL && salen > sizeof(struct sockaddr_un)) {
167 hdrlen = offsetof(struct sockaddr_un, sun_path);
168 name = ((struct sockaddr_un *)kosa)->sun_path;
169 if (*name == '\0') {
170 /*
171 * Linux abstract namespace starts with a NULL byte.
172 * XXX We do not support abstract namespace yet.
173 */
174 namelen = strnlen(name + 1, salen - hdrlen - 1) + 1;
175 } else
176 namelen = strnlen(name, salen - hdrlen);
177 salen = hdrlen + namelen;
178 if (salen > sizeof(struct sockaddr_un)) {
179 error = ENAMETOOLONG;
180 goto out;
181 }
182 }
183
184 sa = (struct sockaddr *)kosa;
185 sa->sa_family = bdom;
186 sa->sa_len = salen;
187
188 *sap = sa;
189 return (0);
190
191 out:
192 free(kosa, M_SONAME);
193 return (error);
194 }
195
196 static int
197 linux_to_bsd_domain(int domain)
198 {
199
200 switch (domain) {
201 case LINUX_AF_UNSPEC:
202 return (AF_UNSPEC);
203 case LINUX_AF_UNIX:
204 return (AF_LOCAL);
205 case LINUX_AF_INET:
206 return (AF_INET);
207 case LINUX_AF_INET6:
208 return (AF_INET6);
209 case LINUX_AF_AX25:
210 return (AF_CCITT);
211 case LINUX_AF_IPX:
212 return (AF_IPX);
213 case LINUX_AF_APPLETALK:
214 return (AF_APPLETALK);
215 }
216 return (-1);
217 }
218
219 static int
220 bsd_to_linux_domain(int domain)
221 {
222
223 switch (domain) {
224 case AF_UNSPEC:
225 return (LINUX_AF_UNSPEC);
226 case AF_LOCAL:
227 return (LINUX_AF_UNIX);
228 case AF_INET:
229 return (LINUX_AF_INET);
230 case AF_INET6:
231 return (LINUX_AF_INET6);
232 case AF_CCITT:
233 return (LINUX_AF_AX25);
234 case AF_IPX:
235 return (LINUX_AF_IPX);
236 case AF_APPLETALK:
237 return (LINUX_AF_APPLETALK);
238 }
239 return (-1);
240 }
241
242 static int
243 linux_to_bsd_sockopt_level(int level)
244 {
245
246 switch (level) {
247 case LINUX_SOL_SOCKET:
248 return (SOL_SOCKET);
249 }
250 return (level);
251 }
252
253 static int
254 bsd_to_linux_sockopt_level(int level)
255 {
256
257 switch (level) {
258 case SOL_SOCKET:
259 return (LINUX_SOL_SOCKET);
260 }
261 return (level);
262 }
263
264 static int
265 linux_to_bsd_ip_sockopt(int opt)
266 {
267
268 switch (opt) {
269 case LINUX_IP_TOS:
270 return (IP_TOS);
271 case LINUX_IP_TTL:
272 return (IP_TTL);
273 case LINUX_IP_OPTIONS:
274 return (IP_OPTIONS);
275 case LINUX_IP_MULTICAST_IF:
276 return (IP_MULTICAST_IF);
277 case LINUX_IP_MULTICAST_TTL:
278 return (IP_MULTICAST_TTL);
279 case LINUX_IP_MULTICAST_LOOP:
280 return (IP_MULTICAST_LOOP);
281 case LINUX_IP_ADD_MEMBERSHIP:
282 return (IP_ADD_MEMBERSHIP);
283 case LINUX_IP_DROP_MEMBERSHIP:
284 return (IP_DROP_MEMBERSHIP);
285 case LINUX_IP_HDRINCL:
286 return (IP_HDRINCL);
287 }
288 return (-1);
289 }
290
291 static int
292 linux_to_bsd_so_sockopt(int opt)
293 {
294
295 switch (opt) {
296 case LINUX_SO_DEBUG:
297 return (SO_DEBUG);
298 case LINUX_SO_REUSEADDR:
299 return (SO_REUSEADDR);
300 case LINUX_SO_TYPE:
301 return (SO_TYPE);
302 case LINUX_SO_ERROR:
303 return (SO_ERROR);
304 case LINUX_SO_DONTROUTE:
305 return (SO_DONTROUTE);
306 case LINUX_SO_BROADCAST:
307 return (SO_BROADCAST);
308 case LINUX_SO_SNDBUF:
309 return (SO_SNDBUF);
310 case LINUX_SO_RCVBUF:
311 return (SO_RCVBUF);
312 case LINUX_SO_KEEPALIVE:
313 return (SO_KEEPALIVE);
314 case LINUX_SO_OOBINLINE:
315 return (SO_OOBINLINE);
316 case LINUX_SO_LINGER:
317 return (SO_LINGER);
318 case LINUX_SO_PEERCRED:
319 return (LOCAL_PEERCRED);
320 case LINUX_SO_RCVLOWAT:
321 return (SO_RCVLOWAT);
322 case LINUX_SO_SNDLOWAT:
323 return (SO_SNDLOWAT);
324 case LINUX_SO_RCVTIMEO:
325 return (SO_RCVTIMEO);
326 case LINUX_SO_SNDTIMEO:
327 return (SO_SNDTIMEO);
328 case LINUX_SO_TIMESTAMP:
329 return (SO_TIMESTAMP);
330 case LINUX_SO_ACCEPTCONN:
331 return (SO_ACCEPTCONN);
332 }
333 return (-1);
334 }
335
336 static int
337 linux_to_bsd_tcp_sockopt(int opt)
338 {
339
340 switch (opt) {
341 case LINUX_TCP_NODELAY:
342 return (TCP_NODELAY);
343 case LINUX_TCP_MAXSEG:
344 return (TCP_MAXSEG);
345 case LINUX_TCP_KEEPIDLE:
346 return (TCP_KEEPIDLE);
347 case LINUX_TCP_KEEPINTVL:
348 return (TCP_KEEPINTVL);
349 case LINUX_TCP_KEEPCNT:
350 return (TCP_KEEPCNT);
351 case LINUX_TCP_MD5SIG:
352 return (TCP_MD5SIG);
353 }
354 return (-1);
355 }
356
357 static int
358 linux_to_bsd_msg_flags(int flags)
359 {
360 int ret_flags = 0;
361
362 if (flags & LINUX_MSG_OOB)
363 ret_flags |= MSG_OOB;
364 if (flags & LINUX_MSG_PEEK)
365 ret_flags |= MSG_PEEK;
366 if (flags & LINUX_MSG_DONTROUTE)
367 ret_flags |= MSG_DONTROUTE;
368 if (flags & LINUX_MSG_CTRUNC)
369 ret_flags |= MSG_CTRUNC;
370 if (flags & LINUX_MSG_TRUNC)
371 ret_flags |= MSG_TRUNC;
372 if (flags & LINUX_MSG_DONTWAIT)
373 ret_flags |= MSG_DONTWAIT;
374 if (flags & LINUX_MSG_EOR)
375 ret_flags |= MSG_EOR;
376 if (flags & LINUX_MSG_WAITALL)
377 ret_flags |= MSG_WAITALL;
378 if (flags & LINUX_MSG_NOSIGNAL)
379 ret_flags |= MSG_NOSIGNAL;
380 #if 0 /* not handled */
381 if (flags & LINUX_MSG_PROXY)
382 ;
383 if (flags & LINUX_MSG_FIN)
384 ;
385 if (flags & LINUX_MSG_SYN)
386 ;
387 if (flags & LINUX_MSG_CONFIRM)
388 ;
389 if (flags & LINUX_MSG_RST)
390 ;
391 if (flags & LINUX_MSG_ERRQUEUE)
392 ;
393 #endif
394 return ret_flags;
395 }
396
397 /*
398 * If bsd_to_linux_sockaddr() or linux_to_bsd_sockaddr() faults, then the
399 * native syscall will fault. Thus, we don't really need to check the
400 * return values for these functions.
401 */
402
403 static int
404 bsd_to_linux_sockaddr(struct sockaddr *arg)
405 {
406 struct sockaddr sa;
407 size_t sa_len = sizeof(struct sockaddr);
408 int error;
409
410 if ((error = copyin(arg, &sa, sa_len)))
411 return (error);
412
413 *(u_short *)&sa = sa.sa_family;
414
415 error = copyout(&sa, arg, sa_len);
416
417 return (error);
418 }
419
420 static int
421 linux_to_bsd_sockaddr(struct sockaddr *arg, int len)
422 {
423 struct sockaddr sa;
424 size_t sa_len = sizeof(struct sockaddr);
425 int error;
426
427 if ((error = copyin(arg, &sa, sa_len)))
428 return (error);
429
430 sa.sa_family = *(sa_family_t *)&sa;
431 sa.sa_len = len;
432
433 error = copyout(&sa, arg, sa_len);
434
435 return (error);
436 }
437
438 static int
439 linux_sa_put(struct osockaddr *osa)
440 {
441 struct osockaddr sa;
442 int error, bdom;
443
444 /*
445 * Only read/write the osockaddr family part, the rest is
446 * not changed.
447 */
448 error = copyin(osa, &sa, sizeof(sa.sa_family));
449 if (error)
450 return (error);
451
452 bdom = bsd_to_linux_domain(sa.sa_family);
453 if (bdom == -1)
454 return (EINVAL);
455
456 sa.sa_family = bdom;
457 error = copyout(&sa, osa, sizeof(sa.sa_family));
458 if (error)
459 return (error);
460
461 return (0);
462 }
463
464 static int
465 linux_to_bsd_cmsg_type(int cmsg_type)
466 {
467
468 switch (cmsg_type) {
469 case LINUX_SCM_RIGHTS:
470 return (SCM_RIGHTS);
471 case LINUX_SCM_CREDENTIALS:
472 return (SCM_CREDS);
473 }
474 return (-1);
475 }
476
477 static int
478 bsd_to_linux_cmsg_type(int cmsg_type)
479 {
480
481 switch (cmsg_type) {
482 case SCM_RIGHTS:
483 return (LINUX_SCM_RIGHTS);
484 case SCM_CREDS:
485 return (LINUX_SCM_CREDENTIALS);
486 case SCM_TIMESTAMP:
487 return (LINUX_SCM_TIMESTAMP);
488 }
489 return (-1);
490 }
491
492 static int
493 linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr)
494 {
495 if (lhdr->msg_controllen > INT_MAX)
496 return (ENOBUFS);
497
498 bhdr->msg_name = PTRIN(lhdr->msg_name);
499 bhdr->msg_namelen = lhdr->msg_namelen;
500 bhdr->msg_iov = PTRIN(lhdr->msg_iov);
501 bhdr->msg_iovlen = lhdr->msg_iovlen;
502 bhdr->msg_control = PTRIN(lhdr->msg_control);
503
504 /*
505 * msg_controllen is skipped since BSD and LINUX control messages
506 * are potentially different sizes (e.g. the cred structure used
507 * by SCM_CREDS is different between the two operating system).
508 *
509 * The caller can set it (if necessary) after converting all the
510 * control messages.
511 */
512
513 bhdr->msg_flags = linux_to_bsd_msg_flags(lhdr->msg_flags);
514 return (0);
515 }
516
517 static int
518 bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr)
519 {
520 lhdr->msg_name = PTROUT(bhdr->msg_name);
521 lhdr->msg_namelen = bhdr->msg_namelen;
522 lhdr->msg_iov = PTROUT(bhdr->msg_iov);
523 lhdr->msg_iovlen = bhdr->msg_iovlen;
524 lhdr->msg_control = PTROUT(bhdr->msg_control);
525
526 /*
527 * msg_controllen is skipped since BSD and LINUX control messages
528 * are potentially different sizes (e.g. the cred structure used
529 * by SCM_CREDS is different between the two operating system).
530 *
531 * The caller can set it (if necessary) after converting all the
532 * control messages.
533 */
534
535 /* msg_flags skipped */
536 return (0);
537 }
538
539 static int
540 linux_set_socket_flags(int lflags, int *flags)
541 {
542
543 if (lflags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK))
544 return (EINVAL);
545 if (lflags & LINUX_SOCK_NONBLOCK)
546 *flags |= SOCK_NONBLOCK;
547 if (lflags & LINUX_SOCK_CLOEXEC)
548 *flags |= SOCK_CLOEXEC;
549 return (0);
550 }
551
552 static int
553 linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags,
554 struct mbuf *control, enum uio_seg segflg)
555 {
556 struct sockaddr *to;
557 int error;
558
559 if (mp->msg_name != NULL) {
560 error = linux_getsockaddr(&to, mp->msg_name, mp->msg_namelen);
561 if (error)
562 return (error);
563 mp->msg_name = to;
564 } else
565 to = NULL;
566
567 error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control,
568 segflg);
569
570 if (to)
571 free(to, M_SONAME);
572 return (error);
573 }
574
575 /* Return 0 if IP_HDRINCL is set for the given socket. */
576 static int
577 linux_check_hdrincl(struct thread *td, int s)
578 {
579 int error, optval;
580 socklen_t size_val;
581
582 size_val = sizeof(optval);
583 error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL,
584 &optval, UIO_SYSSPACE, &size_val);
585 if (error)
586 return (error);
587
588 return (optval == 0);
589 }
590
591 /*
592 * Updated sendto() when IP_HDRINCL is set:
593 * tweak endian-dependent fields in the IP packet.
594 */
595 static int
596 linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args)
597 {
598 /*
599 * linux_ip_copysize defines how many bytes we should copy
600 * from the beginning of the IP packet before we customize it for BSD.
601 * It should include all the fields we modify (ip_len and ip_off).
602 */
603 #define linux_ip_copysize 8
604
605 struct ip *packet;
606 struct msghdr msg;
607 struct iovec aiov[1];
608 int error;
609
610 /* Check that the packet isn't too big or too small. */
611 if (linux_args->len < linux_ip_copysize ||
612 linux_args->len > IP_MAXPACKET)
613 return (EINVAL);
614
615 packet = (struct ip *)malloc(linux_args->len, M_LINUX, M_WAITOK);
616
617 /* Make kernel copy of the packet to be sent */
618 if ((error = copyin(PTRIN(linux_args->msg), packet,
619 linux_args->len)))
620 goto goout;
621
622 /* Convert fields from Linux to BSD raw IP socket format */
623 packet->ip_len = linux_args->len;
624 packet->ip_off = ntohs(packet->ip_off);
625
626 /* Prepare the msghdr and iovec structures describing the new packet */
627 msg.msg_name = PTRIN(linux_args->to);
628 msg.msg_namelen = linux_args->tolen;
629 msg.msg_iov = aiov;
630 msg.msg_iovlen = 1;
631 msg.msg_control = NULL;
632 msg.msg_flags = 0;
633 aiov[0].iov_base = (char *)packet;
634 aiov[0].iov_len = linux_args->len;
635 error = linux_sendit(td, linux_args->s, &msg, linux_args->flags,
636 NULL, UIO_SYSSPACE);
637 goout:
638 free(packet, M_LINUX);
639 return (error);
640 }
641
642 int
643 linux_socket(struct thread *td, struct linux_socket_args *args)
644 {
645 struct socket_args /* {
646 int domain;
647 int type;
648 int protocol;
649 } */ bsd_args;
650 int retval_socket;
651
652 bsd_args.protocol = args->protocol;
653 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK;
654 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX)
655 return (EINVAL);
656 retval_socket = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK,
657 &bsd_args.type);
658 if (retval_socket != 0)
659 return (retval_socket);
660 bsd_args.domain = linux_to_bsd_domain(args->domain);
661 if (bsd_args.domain == -1)
662 return (EAFNOSUPPORT);
663
664 retval_socket = sys_socket(td, &bsd_args);
665 if (retval_socket)
666 return (retval_socket);
667
668 if (bsd_args.type == SOCK_RAW
669 && (bsd_args.protocol == IPPROTO_RAW || bsd_args.protocol == 0)
670 && bsd_args.domain == PF_INET) {
671 /* It's a raw IP socket: set the IP_HDRINCL option. */
672 int hdrincl;
673
674 hdrincl = 1;
675 /* We ignore any error returned by kern_setsockopt() */
676 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL,
677 &hdrincl, UIO_SYSSPACE, sizeof(hdrincl));
678 }
679 #ifdef INET6
680 /*
681 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default
682 * and some apps depend on this. So, set V6ONLY to 0 for Linux apps.
683 * For simplicity we do this unconditionally of the net.inet6.ip6.v6only
684 * sysctl value.
685 */
686 if (bsd_args.domain == PF_INET6) {
687 int v6only;
688
689 v6only = 0;
690 /* We ignore any error returned by setsockopt() */
691 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY,
692 &v6only, UIO_SYSSPACE, sizeof(v6only));
693 }
694 #endif
695
696 return (retval_socket);
697 }
698
699 int
700 linux_bind(struct thread *td, struct linux_bind_args *args)
701 {
702 struct sockaddr *sa;
703 int error;
704
705 error = linux_getsockaddr(&sa, PTRIN(args->name),
706 args->namelen);
707 if (error)
708 return (error);
709
710 error = kern_bind(td, args->s, sa);
711 free(sa, M_SONAME);
712 if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in))
713 return (EINVAL);
714 return (error);
715 }
716
717 int
718 linux_connect(struct thread *td, struct linux_connect_args *args)
719 {
720 cap_rights_t rights;
721 struct socket *so;
722 struct sockaddr *sa;
723 u_int fflag;
724 int error;
725
726 error = linux_getsockaddr(&sa, (struct osockaddr *)PTRIN(args->name),
727 args->namelen);
728 if (error)
729 return (error);
730
731 error = kern_connect(td, args->s, sa);
732 free(sa, M_SONAME);
733 if (error != EISCONN)
734 return (error);
735
736 /*
737 * Linux doesn't return EISCONN the first time it occurs,
738 * when on a non-blocking socket. Instead it returns the
739 * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD.
740 *
741 * XXXRW: Instead of using fgetsock(), check that it is a
742 * socket and use the file descriptor reference instead of
743 * creating a new one.
744 */
745 error = fgetsock(td, args->s, cap_rights_init(&rights, CAP_CONNECT),
746 &so, &fflag);
747 if (error == 0) {
748 error = EISCONN;
749 if (fflag & FNONBLOCK) {
750 SOCK_LOCK(so);
751 if (so->so_emuldata == 0)
752 error = so->so_error;
753 so->so_emuldata = (void *)1;
754 SOCK_UNLOCK(so);
755 }
756 fputsock(so);
757 }
758 return (error);
759 }
760
761 int
762 linux_listen(struct thread *td, struct linux_listen_args *args)
763 {
764 struct listen_args /* {
765 int s;
766 int backlog;
767 } */ bsd_args;
768
769 bsd_args.s = args->s;
770 bsd_args.backlog = args->backlog;
771 return (sys_listen(td, &bsd_args));
772 }
773
774 static int
775 linux_accept_common(struct thread *td, int s, l_uintptr_t addr,
776 l_uintptr_t namelen, int flags)
777 {
778 struct accept4_args /* {
779 int s;
780 struct sockaddr * __restrict name;
781 socklen_t * __restrict anamelen;
782 int flags;
783 } */ bsd_args;
784 int error;
785
786 bsd_args.s = s;
787 /* XXX: */
788 bsd_args.name = (struct sockaddr * __restrict)PTRIN(addr);
789 bsd_args.anamelen = PTRIN(namelen);/* XXX */
790 bsd_args.flags = 0;
791 error = linux_set_socket_flags(flags, &bsd_args.flags);
792 if (error != 0)
793 return (error);
794 error = sys_accept4(td, &bsd_args);
795 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.name);
796 if (error) {
797 if (error == EFAULT && namelen != sizeof(struct sockaddr_in))
798 return (EINVAL);
799 return (error);
800 }
801 if (addr)
802 error = linux_sa_put(PTRIN(addr));
803 if (error) {
804 (void)kern_close(td, td->td_retval[0]);
805 td->td_retval[0] = 0;
806 }
807 return (error);
808 }
809
810 int
811 linux_accept(struct thread *td, struct linux_accept_args *args)
812 {
813
814 return (linux_accept_common(td, args->s, args->addr,
815 args->namelen, 0));
816 }
817
818 int
819 linux_accept4(struct thread *td, struct linux_accept4_args *args)
820 {
821
822 return (linux_accept_common(td, args->s, args->addr,
823 args->namelen, args->flags));
824 }
825
826 int
827 linux_getsockname(struct thread *td, struct linux_getsockname_args *args)
828 {
829 struct getsockname_args /* {
830 int fdes;
831 struct sockaddr * __restrict asa;
832 socklen_t * __restrict alen;
833 } */ bsd_args;
834 int error;
835
836 bsd_args.fdes = args->s;
837 /* XXX: */
838 bsd_args.asa = (struct sockaddr * __restrict)PTRIN(args->addr);
839 bsd_args.alen = PTRIN(args->namelen); /* XXX */
840 error = sys_getsockname(td, &bsd_args);
841 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa);
842 if (error)
843 return (error);
844 error = linux_sa_put(PTRIN(args->addr));
845 if (error)
846 return (error);
847 return (0);
848 }
849
850 int
851 linux_getpeername(struct thread *td, struct linux_getpeername_args *args)
852 {
853 struct getpeername_args /* {
854 int fdes;
855 caddr_t asa;
856 int *alen;
857 } */ bsd_args;
858 int error;
859
860 bsd_args.fdes = args->s;
861 bsd_args.asa = (struct sockaddr *)PTRIN(args->addr);
862 bsd_args.alen = (socklen_t *)PTRIN(args->namelen);
863 error = sys_getpeername(td, &bsd_args);
864 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa);
865 if (error)
866 return (error);
867 error = linux_sa_put(PTRIN(args->addr));
868 if (error)
869 return (error);
870 return (0);
871 }
872
873 int
874 linux_socketpair(struct thread *td, struct linux_socketpair_args *args)
875 {
876 struct socketpair_args /* {
877 int domain;
878 int type;
879 int protocol;
880 int *rsv;
881 } */ bsd_args;
882 int error;
883
884 bsd_args.domain = linux_to_bsd_domain(args->domain);
885 if (bsd_args.domain != PF_LOCAL)
886 return (EAFNOSUPPORT);
887 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK;
888 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX)
889 return (EINVAL);
890 error = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK,
891 &bsd_args.type);
892 if (error != 0)
893 return (error);
894 if (args->protocol != 0 && args->protocol != PF_UNIX)
895
896 /*
897 * Use of PF_UNIX as protocol argument is not right,
898 * but Linux does it.
899 * Do not map PF_UNIX as its Linux value is identical
900 * to FreeBSD one.
901 */
902 return (EPROTONOSUPPORT);
903 else
904 bsd_args.protocol = 0;
905 bsd_args.rsv = (int *)PTRIN(args->rsv);
906 return (sys_socketpair(td, &bsd_args));
907 }
908
909 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
910 struct linux_send_args {
911 int s;
912 l_uintptr_t msg;
913 int len;
914 int flags;
915 };
916
917 static int
918 linux_send(struct thread *td, struct linux_send_args *args)
919 {
920 struct sendto_args /* {
921 int s;
922 caddr_t buf;
923 int len;
924 int flags;
925 caddr_t to;
926 int tolen;
927 } */ bsd_args;
928
929 bsd_args.s = args->s;
930 bsd_args.buf = (caddr_t)PTRIN(args->msg);
931 bsd_args.len = args->len;
932 bsd_args.flags = args->flags;
933 bsd_args.to = NULL;
934 bsd_args.tolen = 0;
935 return sys_sendto(td, &bsd_args);
936 }
937
938 struct linux_recv_args {
939 int s;
940 l_uintptr_t msg;
941 int len;
942 int flags;
943 };
944
945 static int
946 linux_recv(struct thread *td, struct linux_recv_args *args)
947 {
948 struct recvfrom_args /* {
949 int s;
950 caddr_t buf;
951 int len;
952 int flags;
953 struct sockaddr *from;
954 socklen_t fromlenaddr;
955 } */ bsd_args;
956
957 bsd_args.s = args->s;
958 bsd_args.buf = (caddr_t)PTRIN(args->msg);
959 bsd_args.len = args->len;
960 bsd_args.flags = linux_to_bsd_msg_flags(args->flags);
961 bsd_args.from = NULL;
962 bsd_args.fromlenaddr = 0;
963 return (sys_recvfrom(td, &bsd_args));
964 }
965 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
966
967 int
968 linux_sendto(struct thread *td, struct linux_sendto_args *args)
969 {
970 struct msghdr msg;
971 struct iovec aiov;
972 int error;
973
974 if (linux_check_hdrincl(td, args->s) == 0)
975 /* IP_HDRINCL set, tweak the packet before sending */
976 return (linux_sendto_hdrincl(td, args));
977
978 msg.msg_name = PTRIN(args->to);
979 msg.msg_namelen = args->tolen;
980 msg.msg_iov = &aiov;
981 msg.msg_iovlen = 1;
982 msg.msg_control = NULL;
983 msg.msg_flags = 0;
984 aiov.iov_base = PTRIN(args->msg);
985 aiov.iov_len = args->len;
986 error = linux_sendit(td, args->s, &msg, args->flags, NULL,
987 UIO_USERSPACE);
988 return (error);
989 }
990
991 int
992 linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args)
993 {
994 struct msghdr msg;
995 struct iovec aiov;
996 int error;
997
998 if (PTRIN(args->fromlen) != NULL) {
999 error = copyin(PTRIN(args->fromlen), &msg.msg_namelen,
1000 sizeof(msg.msg_namelen));
1001 if (error != 0)
1002 return (error);
1003
1004 error = linux_to_bsd_sockaddr((struct sockaddr *)PTRIN(args->from),
1005 msg.msg_namelen);
1006 if (error != 0)
1007 return (error);
1008 } else
1009 msg.msg_namelen = 0;
1010
1011 msg.msg_name = (struct sockaddr * __restrict)PTRIN(args->from);
1012 msg.msg_iov = &aiov;
1013 msg.msg_iovlen = 1;
1014 aiov.iov_base = PTRIN(args->buf);
1015 aiov.iov_len = args->len;
1016 msg.msg_control = 0;
1017 msg.msg_flags = linux_to_bsd_msg_flags(args->flags);
1018
1019 error = kern_recvit(td, args->s, &msg, UIO_USERSPACE, NULL);
1020 if (error != 0)
1021 return (error);
1022
1023 if (PTRIN(args->from) != NULL) {
1024 error = bsd_to_linux_sockaddr((struct sockaddr *)
1025 PTRIN(args->from));
1026 if (error != 0)
1027 return (error);
1028
1029 error = linux_sa_put((struct osockaddr *)
1030 PTRIN(args->from));
1031 }
1032
1033 if (PTRIN(args->fromlen) != NULL)
1034 error = copyout(&msg.msg_namelen, PTRIN(args->fromlen),
1035 sizeof(msg.msg_namelen));
1036
1037 return (error);
1038 }
1039
1040 static int
1041 linux_sendmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr,
1042 l_uint flags)
1043 {
1044 struct cmsghdr *cmsg;
1045 struct cmsgcred cmcred;
1046 struct mbuf *control;
1047 struct msghdr msg;
1048 struct l_cmsghdr linux_cmsg;
1049 struct l_cmsghdr *ptr_cmsg;
1050 struct l_msghdr linux_msg;
1051 struct iovec *iov;
1052 socklen_t datalen;
1053 struct sockaddr *sa;
1054 sa_family_t sa_family;
1055 void *data;
1056 int error;
1057
1058 error = copyin(msghdr, &linux_msg, sizeof(linux_msg));
1059 if (error != 0)
1060 return (error);
1061
1062 /*
1063 * Some Linux applications (ping) define a non-NULL control data
1064 * pointer, but a msg_controllen of 0, which is not allowed in the
1065 * FreeBSD system call interface. NULL the msg_control pointer in
1066 * order to handle this case. This should be checked, but allows the
1067 * Linux ping to work.
1068 */
1069 if (PTRIN(linux_msg.msg_control) != NULL && linux_msg.msg_controllen == 0)
1070 linux_msg.msg_control = PTROUT(NULL);
1071
1072 error = linux_to_bsd_msghdr(&msg, &linux_msg);
1073 if (error != 0)
1074 return (error);
1075
1076 #ifdef COMPAT_LINUX32
1077 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen,
1078 &iov, EMSGSIZE);
1079 #else
1080 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
1081 #endif
1082 if (error != 0)
1083 return (error);
1084
1085 control = NULL;
1086 cmsg = NULL;
1087
1088 if ((ptr_cmsg = LINUX_CMSG_FIRSTHDR(&linux_msg)) != NULL) {
1089 error = kern_getsockname(td, s, &sa, &datalen);
1090 if (error != 0)
1091 goto bad;
1092 sa_family = sa->sa_family;
1093 free(sa, M_SONAME);
1094
1095 error = ENOBUFS;
1096 cmsg = malloc(CMSG_HDRSZ, M_LINUX, M_WAITOK|M_ZERO);
1097 control = m_get(M_WAITOK, MT_CONTROL);
1098
1099 do {
1100 error = copyin(ptr_cmsg, &linux_cmsg,
1101 sizeof(struct l_cmsghdr));
1102 if (error != 0)
1103 goto bad;
1104
1105 error = EINVAL;
1106 if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr))
1107 goto bad;
1108
1109 /*
1110 * Now we support only SCM_RIGHTS and SCM_CRED,
1111 * so return EINVAL in any other cmsg_type
1112 */
1113 cmsg->cmsg_type =
1114 linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type);
1115 cmsg->cmsg_level =
1116 linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level);
1117 if (cmsg->cmsg_type == -1
1118 || cmsg->cmsg_level != SOL_SOCKET)
1119 goto bad;
1120
1121 /*
1122 * Some applications (e.g. pulseaudio) attempt to
1123 * send ancillary data even if the underlying protocol
1124 * doesn't support it which is not allowed in the
1125 * FreeBSD system call interface.
1126 */
1127 if (sa_family != AF_UNIX)
1128 continue;
1129
1130 data = LINUX_CMSG_DATA(ptr_cmsg);
1131 datalen = linux_cmsg.cmsg_len - L_CMSG_HDRSZ;
1132
1133 switch (cmsg->cmsg_type)
1134 {
1135 case SCM_RIGHTS:
1136 break;
1137
1138 case SCM_CREDS:
1139 data = &cmcred;
1140 datalen = sizeof(cmcred);
1141
1142 /*
1143 * The lower levels will fill in the structure
1144 */
1145 bzero(data, datalen);
1146 break;
1147 }
1148
1149 cmsg->cmsg_len = CMSG_LEN(datalen);
1150
1151 error = ENOBUFS;
1152 if (!m_append(control, CMSG_HDRSZ, (c_caddr_t)cmsg))
1153 goto bad;
1154 if (!m_append(control, datalen, (c_caddr_t)data))
1155 goto bad;
1156 } while ((ptr_cmsg = LINUX_CMSG_NXTHDR(&linux_msg, ptr_cmsg)));
1157
1158 if (m_length(control, NULL) == 0) {
1159 m_freem(control);
1160 control = NULL;
1161 }
1162 }
1163
1164 msg.msg_iov = iov;
1165 msg.msg_flags = 0;
1166 error = linux_sendit(td, s, &msg, flags, control, UIO_USERSPACE);
1167 control = NULL;
1168
1169 bad:
1170 m_freem(control);
1171 free(iov, M_IOV);
1172 if (cmsg)
1173 free(cmsg, M_LINUX);
1174 return (error);
1175 }
1176
1177 int
1178 linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args)
1179 {
1180
1181 return (linux_sendmsg_common(td, args->s, PTRIN(args->msg),
1182 args->flags));
1183 }
1184
1185 int
1186 linux_sendmmsg(struct thread *td, struct linux_sendmmsg_args *args)
1187 {
1188 struct l_mmsghdr *msg;
1189 l_uint retval;
1190 int error, datagrams;
1191
1192 if (args->vlen > UIO_MAXIOV)
1193 args->vlen = UIO_MAXIOV;
1194
1195 msg = PTRIN(args->msg);
1196 datagrams = 0;
1197 while (datagrams < args->vlen) {
1198 error = linux_sendmsg_common(td, args->s, &msg->msg_hdr,
1199 args->flags);
1200 if (error != 0)
1201 break;
1202
1203 retval = td->td_retval[0];
1204 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len));
1205 if (error != 0)
1206 break;
1207 ++msg;
1208 ++datagrams;
1209 }
1210 if (error == 0)
1211 td->td_retval[0] = datagrams;
1212 return (error);
1213 }
1214
1215 static int
1216 linux_recvmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr,
1217 l_uint flags, struct msghdr *msg)
1218 {
1219 struct cmsghdr *cm;
1220 struct cmsgcred *cmcred;
1221 struct l_cmsghdr *linux_cmsg = NULL;
1222 struct l_ucred linux_ucred;
1223 socklen_t datalen, outlen;
1224 struct l_msghdr linux_msg;
1225 struct iovec *iov, *uiov;
1226 struct mbuf *control = NULL;
1227 struct mbuf **controlp;
1228 struct timeval *ftmvl;
1229 l_timeval ltmvl;
1230 caddr_t outbuf;
1231 void *data;
1232 int error, i, fd, fds, *fdp;
1233
1234 error = copyin(msghdr, &linux_msg, sizeof(linux_msg));
1235 if (error != 0)
1236 return (error);
1237
1238 error = linux_to_bsd_msghdr(msg, &linux_msg);
1239 if (error != 0)
1240 return (error);
1241
1242 #ifdef COMPAT_LINUX32
1243 error = linux32_copyiniov(PTRIN(msg->msg_iov), msg->msg_iovlen,
1244 &iov, EMSGSIZE);
1245 #else
1246 error = copyiniov(msg->msg_iov, msg->msg_iovlen, &iov, EMSGSIZE);
1247 #endif
1248 if (error != 0)
1249 return (error);
1250
1251 if (msg->msg_name) {
1252 error = linux_to_bsd_sockaddr((struct sockaddr *)msg->msg_name,
1253 msg->msg_namelen);
1254 if (error != 0)
1255 goto bad;
1256 }
1257
1258 uiov = msg->msg_iov;
1259 msg->msg_iov = iov;
1260 controlp = (msg->msg_control != NULL) ? &control : NULL;
1261 error = kern_recvit(td, s, msg, UIO_USERSPACE, controlp);
1262 msg->msg_iov = uiov;
1263 if (error != 0)
1264 goto bad;
1265
1266 error = bsd_to_linux_msghdr(msg, &linux_msg);
1267 if (error != 0)
1268 goto bad;
1269
1270 if (linux_msg.msg_name) {
1271 error = bsd_to_linux_sockaddr((struct sockaddr *)
1272 PTRIN(linux_msg.msg_name));
1273 if (error != 0)
1274 goto bad;
1275 }
1276 if (linux_msg.msg_name && linux_msg.msg_namelen > 2) {
1277 error = linux_sa_put(PTRIN(linux_msg.msg_name));
1278 if (error != 0)
1279 goto bad;
1280 }
1281
1282 outbuf = PTRIN(linux_msg.msg_control);
1283 outlen = 0;
1284
1285 if (control) {
1286 linux_cmsg = malloc(L_CMSG_HDRSZ, M_LINUX, M_WAITOK | M_ZERO);
1287
1288 msg->msg_control = mtod(control, struct cmsghdr *);
1289 msg->msg_controllen = control->m_len;
1290
1291 cm = CMSG_FIRSTHDR(msg);
1292
1293 while (cm != NULL) {
1294 linux_cmsg->cmsg_type =
1295 bsd_to_linux_cmsg_type(cm->cmsg_type);
1296 linux_cmsg->cmsg_level =
1297 bsd_to_linux_sockopt_level(cm->cmsg_level);
1298 if (linux_cmsg->cmsg_type == -1
1299 || cm->cmsg_level != SOL_SOCKET)
1300 {
1301 error = EINVAL;
1302 goto bad;
1303 }
1304
1305 data = CMSG_DATA(cm);
1306 datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data;
1307
1308 switch (cm->cmsg_type)
1309 {
1310 case SCM_RIGHTS:
1311 if (flags & LINUX_MSG_CMSG_CLOEXEC) {
1312 fds = datalen / sizeof(int);
1313 fdp = data;
1314 for (i = 0; i < fds; i++) {
1315 fd = *fdp++;
1316 (void)kern_fcntl(td, fd,
1317 F_SETFD, FD_CLOEXEC);
1318 }
1319 }
1320 break;
1321
1322 case SCM_CREDS:
1323 /*
1324 * Currently LOCAL_CREDS is never in
1325 * effect for Linux so no need to worry
1326 * about sockcred
1327 */
1328 if (datalen != sizeof(*cmcred)) {
1329 error = EMSGSIZE;
1330 goto bad;
1331 }
1332 cmcred = (struct cmsgcred *)data;
1333 bzero(&linux_ucred, sizeof(linux_ucred));
1334 linux_ucred.pid = cmcred->cmcred_pid;
1335 linux_ucred.uid = cmcred->cmcred_uid;
1336 linux_ucred.gid = cmcred->cmcred_gid;
1337 data = &linux_ucred;
1338 datalen = sizeof(linux_ucred);
1339 break;
1340
1341 case SCM_TIMESTAMP:
1342 if (datalen != sizeof(struct timeval)) {
1343 error = EMSGSIZE;
1344 goto bad;
1345 }
1346 ftmvl = (struct timeval *)data;
1347 ltmvl.tv_sec = ftmvl->tv_sec;
1348 ltmvl.tv_usec = ftmvl->tv_usec;
1349 data = <mvl;
1350 datalen = sizeof(ltmvl);
1351 break;
1352 }
1353
1354 if (outlen + LINUX_CMSG_LEN(datalen) >
1355 linux_msg.msg_controllen) {
1356 if (outlen == 0) {
1357 error = EMSGSIZE;
1358 goto bad;
1359 } else {
1360 linux_msg.msg_flags |=
1361 LINUX_MSG_CTRUNC;
1362 goto out;
1363 }
1364 }
1365
1366 linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen);
1367
1368 error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ);
1369 if (error)
1370 goto bad;
1371 outbuf += L_CMSG_HDRSZ;
1372
1373 error = copyout(data, outbuf, datalen);
1374 if (error)
1375 goto bad;
1376
1377 outbuf += LINUX_CMSG_ALIGN(datalen);
1378 outlen += LINUX_CMSG_LEN(datalen);
1379
1380 cm = CMSG_NXTHDR(msg, cm);
1381 }
1382 }
1383
1384 out:
1385 linux_msg.msg_controllen = outlen;
1386 error = copyout(&linux_msg, msghdr, sizeof(linux_msg));
1387
1388 bad:
1389 free(iov, M_IOV);
1390 m_freem(control);
1391 free(linux_cmsg, M_LINUX);
1392
1393 return (error);
1394 }
1395
1396 int
1397 linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args)
1398 {
1399 struct msghdr bsd_msg;
1400
1401 return (linux_recvmsg_common(td, args->s, PTRIN(args->msg),
1402 args->flags, &bsd_msg));
1403 }
1404
1405 int
1406 linux_recvmmsg(struct thread *td, struct linux_recvmmsg_args *args)
1407 {
1408 struct l_mmsghdr *msg;
1409 struct msghdr bsd_msg;
1410 struct l_timespec lts;
1411 struct timespec ts, tts;
1412 l_uint retval;
1413 int error, datagrams;
1414
1415 if (args->timeout) {
1416 error = copyin(args->timeout, <s, sizeof(struct l_timespec));
1417 if (error != 0)
1418 return (error);
1419 error = linux_to_native_timespec(&ts, <s);
1420 if (error != 0)
1421 return (error);
1422 getnanotime(&tts);
1423 timespecadd(&tts, &ts);
1424 }
1425
1426 msg = PTRIN(args->msg);
1427 datagrams = 0;
1428 while (datagrams < args->vlen) {
1429 error = linux_recvmsg_common(td, args->s, &msg->msg_hdr,
1430 args->flags & ~LINUX_MSG_WAITFORONE, &bsd_msg);
1431 if (error != 0)
1432 break;
1433
1434 retval = td->td_retval[0];
1435 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len));
1436 if (error != 0)
1437 break;
1438 ++msg;
1439 ++datagrams;
1440
1441 /*
1442 * MSG_WAITFORONE turns on MSG_DONTWAIT after one packet.
1443 */
1444 if (args->flags & LINUX_MSG_WAITFORONE)
1445 args->flags |= LINUX_MSG_DONTWAIT;
1446
1447 /*
1448 * See BUGS section of recvmmsg(2).
1449 */
1450 if (args->timeout) {
1451 getnanotime(&ts);
1452 timespecsub(&ts, &tts);
1453 if (!timespecisset(&ts) || ts.tv_sec > 0)
1454 break;
1455 }
1456 /* Out of band data, return right away. */
1457 if (bsd_msg.msg_flags & MSG_OOB)
1458 break;
1459 }
1460 if (error == 0)
1461 td->td_retval[0] = datagrams;
1462 return (error);
1463 }
1464
1465 int
1466 linux_shutdown(struct thread *td, struct linux_shutdown_args *args)
1467 {
1468 struct shutdown_args /* {
1469 int s;
1470 int how;
1471 } */ bsd_args;
1472
1473 bsd_args.s = args->s;
1474 bsd_args.how = args->how;
1475 return (sys_shutdown(td, &bsd_args));
1476 }
1477
1478 int
1479 linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args)
1480 {
1481 struct setsockopt_args /* {
1482 int s;
1483 int level;
1484 int name;
1485 caddr_t val;
1486 int valsize;
1487 } */ bsd_args;
1488 l_timeval linux_tv;
1489 struct timeval tv;
1490 int error, name;
1491
1492 bsd_args.s = args->s;
1493 bsd_args.level = linux_to_bsd_sockopt_level(args->level);
1494 switch (bsd_args.level) {
1495 case SOL_SOCKET:
1496 name = linux_to_bsd_so_sockopt(args->optname);
1497 switch (name) {
1498 case SO_RCVTIMEO:
1499 /* FALLTHROUGH */
1500 case SO_SNDTIMEO:
1501 error = copyin(PTRIN(args->optval), &linux_tv,
1502 sizeof(linux_tv));
1503 if (error)
1504 return (error);
1505 tv.tv_sec = linux_tv.tv_sec;
1506 tv.tv_usec = linux_tv.tv_usec;
1507 return (kern_setsockopt(td, args->s, bsd_args.level,
1508 name, &tv, UIO_SYSSPACE, sizeof(tv)));
1509 /* NOTREACHED */
1510 break;
1511 default:
1512 break;
1513 }
1514 break;
1515 case IPPROTO_IP:
1516 name = linux_to_bsd_ip_sockopt(args->optname);
1517 break;
1518 case IPPROTO_TCP:
1519 name = linux_to_bsd_tcp_sockopt(args->optname);
1520 break;
1521 default:
1522 name = -1;
1523 break;
1524 }
1525 if (name == -1)
1526 return (ENOPROTOOPT);
1527
1528 bsd_args.name = name;
1529 bsd_args.val = PTRIN(args->optval);
1530 bsd_args.valsize = args->optlen;
1531
1532 if (name == IPV6_NEXTHOP) {
1533 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val,
1534 bsd_args.valsize);
1535 error = sys_setsockopt(td, &bsd_args);
1536 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val);
1537 } else
1538 error = sys_setsockopt(td, &bsd_args);
1539
1540 return (error);
1541 }
1542
1543 int
1544 linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args)
1545 {
1546 struct getsockopt_args /* {
1547 int s;
1548 int level;
1549 int name;
1550 caddr_t val;
1551 int *avalsize;
1552 } */ bsd_args;
1553 l_timeval linux_tv;
1554 struct timeval tv;
1555 socklen_t tv_len, xulen;
1556 struct xucred xu;
1557 struct l_ucred lxu;
1558 int error, name;
1559
1560 bsd_args.s = args->s;
1561 bsd_args.level = linux_to_bsd_sockopt_level(args->level);
1562 switch (bsd_args.level) {
1563 case SOL_SOCKET:
1564 name = linux_to_bsd_so_sockopt(args->optname);
1565 switch (name) {
1566 case SO_RCVTIMEO:
1567 /* FALLTHROUGH */
1568 case SO_SNDTIMEO:
1569 tv_len = sizeof(tv);
1570 error = kern_getsockopt(td, args->s, bsd_args.level,
1571 name, &tv, UIO_SYSSPACE, &tv_len);
1572 if (error)
1573 return (error);
1574 linux_tv.tv_sec = tv.tv_sec;
1575 linux_tv.tv_usec = tv.tv_usec;
1576 return (copyout(&linux_tv, PTRIN(args->optval),
1577 sizeof(linux_tv)));
1578 /* NOTREACHED */
1579 break;
1580 case LOCAL_PEERCRED:
1581 if (args->optlen != sizeof(lxu))
1582 return (EINVAL);
1583 xulen = sizeof(xu);
1584 error = kern_getsockopt(td, args->s, bsd_args.level,
1585 name, &xu, UIO_SYSSPACE, &xulen);
1586 if (error)
1587 return (error);
1588 /*
1589 * XXX Use 0 for pid as the FreeBSD does not cache peer pid.
1590 */
1591 lxu.pid = 0;
1592 lxu.uid = xu.cr_uid;
1593 lxu.gid = xu.cr_gid;
1594 return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu)));
1595 /* NOTREACHED */
1596 break;
1597 default:
1598 break;
1599 }
1600 break;
1601 case IPPROTO_IP:
1602 name = linux_to_bsd_ip_sockopt(args->optname);
1603 break;
1604 case IPPROTO_TCP:
1605 name = linux_to_bsd_tcp_sockopt(args->optname);
1606 break;
1607 default:
1608 name = -1;
1609 break;
1610 }
1611 if (name == -1)
1612 return (EINVAL);
1613
1614 bsd_args.name = name;
1615 bsd_args.val = PTRIN(args->optval);
1616 bsd_args.avalsize = PTRIN(args->optlen);
1617
1618 if (name == IPV6_NEXTHOP) {
1619 error = sys_getsockopt(td, &bsd_args);
1620 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val);
1621 } else
1622 error = sys_getsockopt(td, &bsd_args);
1623
1624 return (error);
1625 }
1626
1627 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1628
1629 /* Argument list sizes for linux_socketcall */
1630
1631 #define LINUX_AL(x) ((x) * sizeof(l_ulong))
1632
1633 static const unsigned char lxs_args[] = {
1634 LINUX_AL(0) /* unused*/, LINUX_AL(3) /* socket */,
1635 LINUX_AL(3) /* bind */, LINUX_AL(3) /* connect */,
1636 LINUX_AL(2) /* listen */, LINUX_AL(3) /* accept */,
1637 LINUX_AL(3) /* getsockname */, LINUX_AL(3) /* getpeername */,
1638 LINUX_AL(4) /* socketpair */, LINUX_AL(4) /* send */,
1639 LINUX_AL(4) /* recv */, LINUX_AL(6) /* sendto */,
1640 LINUX_AL(6) /* recvfrom */, LINUX_AL(2) /* shutdown */,
1641 LINUX_AL(5) /* setsockopt */, LINUX_AL(5) /* getsockopt */,
1642 LINUX_AL(3) /* sendmsg */, LINUX_AL(3) /* recvmsg */,
1643 LINUX_AL(4) /* accept4 */, LINUX_AL(5) /* recvmmsg */,
1644 LINUX_AL(4) /* sendmmsg */
1645 };
1646
1647 #define LINUX_AL_SIZE sizeof(lxs_args) / sizeof(lxs_args[0]) - 1
1648
1649 int
1650 linux_socketcall(struct thread *td, struct linux_socketcall_args *args)
1651 {
1652 l_ulong a[6];
1653 void *arg;
1654 int error;
1655
1656 if (args->what < LINUX_SOCKET || args->what > LINUX_AL_SIZE)
1657 return (EINVAL);
1658 error = copyin(PTRIN(args->args), a, lxs_args[args->what]);
1659 if (error)
1660 return (error);
1661
1662 arg = a;
1663 switch (args->what) {
1664 case LINUX_SOCKET:
1665 return (linux_socket(td, arg));
1666 case LINUX_BIND:
1667 return (linux_bind(td, arg));
1668 case LINUX_CONNECT:
1669 return (linux_connect(td, arg));
1670 case LINUX_LISTEN:
1671 return (linux_listen(td, arg));
1672 case LINUX_ACCEPT:
1673 return (linux_accept(td, arg));
1674 case LINUX_GETSOCKNAME:
1675 return (linux_getsockname(td, arg));
1676 case LINUX_GETPEERNAME:
1677 return (linux_getpeername(td, arg));
1678 case LINUX_SOCKETPAIR:
1679 return (linux_socketpair(td, arg));
1680 case LINUX_SEND:
1681 return (linux_send(td, arg));
1682 case LINUX_RECV:
1683 return (linux_recv(td, arg));
1684 case LINUX_SENDTO:
1685 return (linux_sendto(td, arg));
1686 case LINUX_RECVFROM:
1687 return (linux_recvfrom(td, arg));
1688 case LINUX_SHUTDOWN:
1689 return (linux_shutdown(td, arg));
1690 case LINUX_SETSOCKOPT:
1691 return (linux_setsockopt(td, arg));
1692 case LINUX_GETSOCKOPT:
1693 return (linux_getsockopt(td, arg));
1694 case LINUX_SENDMSG:
1695 return (linux_sendmsg(td, arg));
1696 case LINUX_RECVMSG:
1697 return (linux_recvmsg(td, arg));
1698 case LINUX_ACCEPT4:
1699 return (linux_accept4(td, arg));
1700 case LINUX_RECVMMSG:
1701 return (linux_recvmmsg(td, arg));
1702 case LINUX_SENDMMSG:
1703 return (linux_sendmmsg(td, arg));
1704 }
1705
1706 uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what);
1707 return (ENOSYS);
1708 }
1709 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
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