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/11.1/sys/compat/linux/linux_socket.c 315955 2017-03-25 14:28:20Z 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 <net/vnet.h>
57 #include <netinet/in.h>
58 #include <netinet/in_systm.h>
59 #include <netinet/ip.h>
60 #include <netinet/tcp.h>
61 #ifdef INET6
62 #include <netinet/ip6.h>
63 #include <netinet6/ip6_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_ip6_sockopt(int opt)
293 {
294
295 switch (opt) {
296 case LINUX_IPV6_NEXTHOP:
297 return (IPV6_NEXTHOP);
298 case LINUX_IPV6_UNICAST_HOPS:
299 return (IPV6_UNICAST_HOPS);
300 case LINUX_IPV6_MULTICAST_IF:
301 return (IPV6_MULTICAST_IF);
302 case LINUX_IPV6_MULTICAST_HOPS:
303 return (IPV6_MULTICAST_HOPS);
304 case LINUX_IPV6_MULTICAST_LOOP:
305 return (IPV6_MULTICAST_LOOP);
306 case LINUX_IPV6_ADD_MEMBERSHIP:
307 return (IPV6_JOIN_GROUP);
308 case LINUX_IPV6_DROP_MEMBERSHIP:
309 return (IPV6_LEAVE_GROUP);
310 case LINUX_IPV6_V6ONLY:
311 return (IPV6_V6ONLY);
312 case LINUX_IPV6_DONTFRAG:
313 return (IPV6_DONTFRAG);
314 #if 0
315 case LINUX_IPV6_CHECKSUM:
316 return (IPV6_CHECKSUM);
317 case LINUX_IPV6_RECVPKTINFO:
318 return (IPV6_RECVPKTINFO);
319 case LINUX_IPV6_PKTINFO:
320 return (IPV6_PKTINFO);
321 case LINUX_IPV6_RECVHOPLIMIT:
322 return (IPV6_RECVHOPLIMIT);
323 case LINUX_IPV6_HOPLIMIT:
324 return (IPV6_HOPLIMIT);
325 case LINUX_IPV6_RECVHOPOPTS:
326 return (IPV6_RECVHOPOPTS);
327 case LINUX_IPV6_HOPOPTS:
328 return (IPV6_HOPOPTS);
329 case LINUX_IPV6_RTHDRDSTOPTS:
330 return (IPV6_RTHDRDSTOPTS);
331 case LINUX_IPV6_RECVRTHDR:
332 return (IPV6_RECVRTHDR);
333 case LINUX_IPV6_RTHDR:
334 return (IPV6_RTHDR);
335 case LINUX_IPV6_RECVDSTOPTS:
336 return (IPV6_RECVDSTOPTS);
337 case LINUX_IPV6_DSTOPTS:
338 return (IPV6_DSTOPTS);
339 case LINUX_IPV6_RECVPATHMTU:
340 return (IPV6_RECVPATHMTU);
341 case LINUX_IPV6_PATHMTU:
342 return (IPV6_PATHMTU);
343 #endif
344 }
345 return (-1);
346 }
347
348 static int
349 linux_to_bsd_so_sockopt(int opt)
350 {
351
352 switch (opt) {
353 case LINUX_SO_DEBUG:
354 return (SO_DEBUG);
355 case LINUX_SO_REUSEADDR:
356 return (SO_REUSEADDR);
357 case LINUX_SO_TYPE:
358 return (SO_TYPE);
359 case LINUX_SO_ERROR:
360 return (SO_ERROR);
361 case LINUX_SO_DONTROUTE:
362 return (SO_DONTROUTE);
363 case LINUX_SO_BROADCAST:
364 return (SO_BROADCAST);
365 case LINUX_SO_SNDBUF:
366 return (SO_SNDBUF);
367 case LINUX_SO_RCVBUF:
368 return (SO_RCVBUF);
369 case LINUX_SO_KEEPALIVE:
370 return (SO_KEEPALIVE);
371 case LINUX_SO_OOBINLINE:
372 return (SO_OOBINLINE);
373 case LINUX_SO_LINGER:
374 return (SO_LINGER);
375 case LINUX_SO_PEERCRED:
376 return (LOCAL_PEERCRED);
377 case LINUX_SO_RCVLOWAT:
378 return (SO_RCVLOWAT);
379 case LINUX_SO_SNDLOWAT:
380 return (SO_SNDLOWAT);
381 case LINUX_SO_RCVTIMEO:
382 return (SO_RCVTIMEO);
383 case LINUX_SO_SNDTIMEO:
384 return (SO_SNDTIMEO);
385 case LINUX_SO_TIMESTAMP:
386 return (SO_TIMESTAMP);
387 case LINUX_SO_ACCEPTCONN:
388 return (SO_ACCEPTCONN);
389 }
390 return (-1);
391 }
392
393 static int
394 linux_to_bsd_tcp_sockopt(int opt)
395 {
396
397 switch (opt) {
398 case LINUX_TCP_NODELAY:
399 return (TCP_NODELAY);
400 case LINUX_TCP_MAXSEG:
401 return (TCP_MAXSEG);
402 case LINUX_TCP_KEEPIDLE:
403 return (TCP_KEEPIDLE);
404 case LINUX_TCP_KEEPINTVL:
405 return (TCP_KEEPINTVL);
406 case LINUX_TCP_KEEPCNT:
407 return (TCP_KEEPCNT);
408 case LINUX_TCP_MD5SIG:
409 return (TCP_MD5SIG);
410 }
411 return (-1);
412 }
413
414 static int
415 linux_to_bsd_msg_flags(int flags)
416 {
417 int ret_flags = 0;
418
419 if (flags & LINUX_MSG_OOB)
420 ret_flags |= MSG_OOB;
421 if (flags & LINUX_MSG_PEEK)
422 ret_flags |= MSG_PEEK;
423 if (flags & LINUX_MSG_DONTROUTE)
424 ret_flags |= MSG_DONTROUTE;
425 if (flags & LINUX_MSG_CTRUNC)
426 ret_flags |= MSG_CTRUNC;
427 if (flags & LINUX_MSG_TRUNC)
428 ret_flags |= MSG_TRUNC;
429 if (flags & LINUX_MSG_DONTWAIT)
430 ret_flags |= MSG_DONTWAIT;
431 if (flags & LINUX_MSG_EOR)
432 ret_flags |= MSG_EOR;
433 if (flags & LINUX_MSG_WAITALL)
434 ret_flags |= MSG_WAITALL;
435 if (flags & LINUX_MSG_NOSIGNAL)
436 ret_flags |= MSG_NOSIGNAL;
437 #if 0 /* not handled */
438 if (flags & LINUX_MSG_PROXY)
439 ;
440 if (flags & LINUX_MSG_FIN)
441 ;
442 if (flags & LINUX_MSG_SYN)
443 ;
444 if (flags & LINUX_MSG_CONFIRM)
445 ;
446 if (flags & LINUX_MSG_RST)
447 ;
448 if (flags & LINUX_MSG_ERRQUEUE)
449 ;
450 #endif
451 return (ret_flags);
452 }
453
454 /*
455 * If bsd_to_linux_sockaddr() or linux_to_bsd_sockaddr() faults, then the
456 * native syscall will fault. Thus, we don't really need to check the
457 * return values for these functions.
458 */
459
460 static int
461 bsd_to_linux_sockaddr(struct sockaddr *arg)
462 {
463 struct sockaddr sa;
464 size_t sa_len = sizeof(struct sockaddr);
465 int error, bdom;
466
467 if ((error = copyin(arg, &sa, sa_len)))
468 return (error);
469
470 bdom = bsd_to_linux_domain(sa.sa_family);
471 if (bdom == -1)
472 return (EAFNOSUPPORT);
473
474 *(u_short *)&sa = bdom;
475 return (copyout(&sa, arg, sa_len));
476 }
477
478 static int
479 linux_to_bsd_sockaddr(struct sockaddr *arg, int len)
480 {
481 struct sockaddr sa;
482 size_t sa_len = sizeof(struct sockaddr);
483 int error, bdom;
484
485 if ((error = copyin(arg, &sa, sa_len)))
486 return (error);
487
488 bdom = linux_to_bsd_domain(*(sa_family_t *)&sa);
489 if (bdom == -1)
490 return (EAFNOSUPPORT);
491
492 sa.sa_family = bdom;
493 sa.sa_len = len;
494 return (copyout(&sa, arg, sa_len));
495 }
496
497 static int
498 linux_sa_put(struct osockaddr *osa)
499 {
500 struct osockaddr sa;
501 int error, bdom;
502
503 /*
504 * Only read/write the osockaddr family part, the rest is
505 * not changed.
506 */
507 error = copyin(osa, &sa, sizeof(sa.sa_family));
508 if (error != 0)
509 return (error);
510
511 bdom = bsd_to_linux_domain(sa.sa_family);
512 if (bdom == -1)
513 return (EINVAL);
514
515 sa.sa_family = bdom;
516 return (copyout(&sa, osa, sizeof(sa.sa_family)));
517 }
518
519 static int
520 linux_to_bsd_cmsg_type(int cmsg_type)
521 {
522
523 switch (cmsg_type) {
524 case LINUX_SCM_RIGHTS:
525 return (SCM_RIGHTS);
526 case LINUX_SCM_CREDENTIALS:
527 return (SCM_CREDS);
528 }
529 return (-1);
530 }
531
532 static int
533 bsd_to_linux_cmsg_type(int cmsg_type)
534 {
535
536 switch (cmsg_type) {
537 case SCM_RIGHTS:
538 return (LINUX_SCM_RIGHTS);
539 case SCM_CREDS:
540 return (LINUX_SCM_CREDENTIALS);
541 case SCM_TIMESTAMP:
542 return (LINUX_SCM_TIMESTAMP);
543 }
544 return (-1);
545 }
546
547 static int
548 linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr)
549 {
550 if (lhdr->msg_controllen > INT_MAX)
551 return (ENOBUFS);
552
553 bhdr->msg_name = PTRIN(lhdr->msg_name);
554 bhdr->msg_namelen = lhdr->msg_namelen;
555 bhdr->msg_iov = PTRIN(lhdr->msg_iov);
556 bhdr->msg_iovlen = lhdr->msg_iovlen;
557 bhdr->msg_control = PTRIN(lhdr->msg_control);
558
559 /*
560 * msg_controllen is skipped since BSD and LINUX control messages
561 * are potentially different sizes (e.g. the cred structure used
562 * by SCM_CREDS is different between the two operating system).
563 *
564 * The caller can set it (if necessary) after converting all the
565 * control messages.
566 */
567
568 bhdr->msg_flags = linux_to_bsd_msg_flags(lhdr->msg_flags);
569 return (0);
570 }
571
572 static int
573 bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr)
574 {
575 lhdr->msg_name = PTROUT(bhdr->msg_name);
576 lhdr->msg_namelen = bhdr->msg_namelen;
577 lhdr->msg_iov = PTROUT(bhdr->msg_iov);
578 lhdr->msg_iovlen = bhdr->msg_iovlen;
579 lhdr->msg_control = PTROUT(bhdr->msg_control);
580
581 /*
582 * msg_controllen is skipped since BSD and LINUX control messages
583 * are potentially different sizes (e.g. the cred structure used
584 * by SCM_CREDS is different between the two operating system).
585 *
586 * The caller can set it (if necessary) after converting all the
587 * control messages.
588 */
589
590 /* msg_flags skipped */
591 return (0);
592 }
593
594 static int
595 linux_set_socket_flags(int lflags, int *flags)
596 {
597
598 if (lflags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK))
599 return (EINVAL);
600 if (lflags & LINUX_SOCK_NONBLOCK)
601 *flags |= SOCK_NONBLOCK;
602 if (lflags & LINUX_SOCK_CLOEXEC)
603 *flags |= SOCK_CLOEXEC;
604 return (0);
605 }
606
607 static int
608 linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags,
609 struct mbuf *control, enum uio_seg segflg)
610 {
611 struct sockaddr *to;
612 int error;
613
614 if (mp->msg_name != NULL) {
615 error = linux_getsockaddr(&to, mp->msg_name, mp->msg_namelen);
616 if (error != 0)
617 return (error);
618 mp->msg_name = to;
619 } else
620 to = NULL;
621
622 error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control,
623 segflg);
624
625 if (to)
626 free(to, M_SONAME);
627 return (error);
628 }
629
630 /* Return 0 if IP_HDRINCL is set for the given socket. */
631 static int
632 linux_check_hdrincl(struct thread *td, int s)
633 {
634 int error, optval;
635 socklen_t size_val;
636
637 size_val = sizeof(optval);
638 error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL,
639 &optval, UIO_SYSSPACE, &size_val);
640 if (error != 0)
641 return (error);
642
643 return (optval == 0);
644 }
645
646 /*
647 * Updated sendto() when IP_HDRINCL is set:
648 * tweak endian-dependent fields in the IP packet.
649 */
650 static int
651 linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args)
652 {
653 /*
654 * linux_ip_copysize defines how many bytes we should copy
655 * from the beginning of the IP packet before we customize it for BSD.
656 * It should include all the fields we modify (ip_len and ip_off).
657 */
658 #define linux_ip_copysize 8
659
660 struct ip *packet;
661 struct msghdr msg;
662 struct iovec aiov[1];
663 int error;
664
665 /* Check that the packet isn't too big or too small. */
666 if (linux_args->len < linux_ip_copysize ||
667 linux_args->len > IP_MAXPACKET)
668 return (EINVAL);
669
670 packet = (struct ip *)malloc(linux_args->len, M_LINUX, M_WAITOK);
671
672 /* Make kernel copy of the packet to be sent */
673 if ((error = copyin(PTRIN(linux_args->msg), packet,
674 linux_args->len)))
675 goto goout;
676
677 /* Convert fields from Linux to BSD raw IP socket format */
678 packet->ip_len = linux_args->len;
679 packet->ip_off = ntohs(packet->ip_off);
680
681 /* Prepare the msghdr and iovec structures describing the new packet */
682 msg.msg_name = PTRIN(linux_args->to);
683 msg.msg_namelen = linux_args->tolen;
684 msg.msg_iov = aiov;
685 msg.msg_iovlen = 1;
686 msg.msg_control = NULL;
687 msg.msg_flags = 0;
688 aiov[0].iov_base = (char *)packet;
689 aiov[0].iov_len = linux_args->len;
690 error = linux_sendit(td, linux_args->s, &msg, linux_args->flags,
691 NULL, UIO_SYSSPACE);
692 goout:
693 free(packet, M_LINUX);
694 return (error);
695 }
696
697 int
698 linux_socket(struct thread *td, struct linux_socket_args *args)
699 {
700 int domain, retval_socket, type;
701
702 type = args->type & LINUX_SOCK_TYPE_MASK;
703 if (type < 0 || type > LINUX_SOCK_MAX)
704 return (EINVAL);
705 retval_socket = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK,
706 &type);
707 if (retval_socket != 0)
708 return (retval_socket);
709 domain = linux_to_bsd_domain(args->domain);
710 if (domain == -1)
711 return (EAFNOSUPPORT);
712
713 retval_socket = kern_socket(td, domain, type, args->protocol);
714 if (retval_socket)
715 return (retval_socket);
716
717 if (type == SOCK_RAW
718 && (args->protocol == IPPROTO_RAW || args->protocol == 0)
719 && domain == PF_INET) {
720 /* It's a raw IP socket: set the IP_HDRINCL option. */
721 int hdrincl;
722
723 hdrincl = 1;
724 /* We ignore any error returned by kern_setsockopt() */
725 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL,
726 &hdrincl, UIO_SYSSPACE, sizeof(hdrincl));
727 }
728 #ifdef INET6
729 /*
730 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default
731 * and some apps depend on this. So, set V6ONLY to 0 for Linux apps.
732 * For simplicity we do this unconditionally of the net.inet6.ip6.v6only
733 * sysctl value.
734 */
735 if (domain == PF_INET6) {
736 int v6only;
737
738 v6only = 0;
739 /* We ignore any error returned by setsockopt() */
740 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY,
741 &v6only, UIO_SYSSPACE, sizeof(v6only));
742 }
743 #endif
744
745 return (retval_socket);
746 }
747
748 int
749 linux_bind(struct thread *td, struct linux_bind_args *args)
750 {
751 struct sockaddr *sa;
752 int error;
753
754 error = linux_getsockaddr(&sa, PTRIN(args->name),
755 args->namelen);
756 if (error != 0)
757 return (error);
758
759 error = kern_bindat(td, AT_FDCWD, args->s, sa);
760 free(sa, M_SONAME);
761 if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in))
762 return (EINVAL);
763 return (error);
764 }
765
766 int
767 linux_connect(struct thread *td, struct linux_connect_args *args)
768 {
769 cap_rights_t rights;
770 struct socket *so;
771 struct sockaddr *sa;
772 struct file *fp;
773 u_int fflag;
774 int error;
775
776 error = linux_getsockaddr(&sa, (struct osockaddr *)PTRIN(args->name),
777 args->namelen);
778 if (error != 0)
779 return (error);
780
781 error = kern_connectat(td, AT_FDCWD, args->s, sa);
782 free(sa, M_SONAME);
783 if (error != EISCONN)
784 return (error);
785
786 /*
787 * Linux doesn't return EISCONN the first time it occurs,
788 * when on a non-blocking socket. Instead it returns the
789 * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD.
790 */
791 error = getsock_cap(td, args->s, cap_rights_init(&rights, CAP_CONNECT),
792 &fp, &fflag, NULL);
793 if (error != 0)
794 return (error);
795
796 error = EISCONN;
797 so = fp->f_data;
798 if (fflag & FNONBLOCK) {
799 SOCK_LOCK(so);
800 if (so->so_emuldata == 0)
801 error = so->so_error;
802 so->so_emuldata = (void *)1;
803 SOCK_UNLOCK(so);
804 }
805 fdrop(fp, td);
806
807 return (error);
808 }
809
810 int
811 linux_listen(struct thread *td, struct linux_listen_args *args)
812 {
813
814 return (kern_listen(td, args->s, args->backlog));
815 }
816
817 static int
818 linux_accept_common(struct thread *td, int s, l_uintptr_t addr,
819 l_uintptr_t namelen, int flags)
820 {
821 struct accept4_args /* {
822 int s;
823 struct sockaddr * __restrict name;
824 socklen_t * __restrict anamelen;
825 int flags;
826 } */ bsd_args;
827 cap_rights_t rights;
828 struct socket *so;
829 struct file *fp;
830 int error, error1;
831
832 bsd_args.s = s;
833 bsd_args.name = (struct sockaddr * __restrict)PTRIN(addr);
834 bsd_args.anamelen = PTRIN(namelen);
835 bsd_args.flags = 0;
836 error = linux_set_socket_flags(flags, &bsd_args.flags);
837 if (error != 0)
838 return (error);
839 error = sys_accept4(td, &bsd_args);
840 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.name);
841 if (error != 0) {
842 if (error == EFAULT && namelen != sizeof(struct sockaddr_in))
843 return (EINVAL);
844 if (error == EINVAL) {
845 error1 = getsock_cap(td, s,
846 cap_rights_init(&rights, CAP_ACCEPT), &fp, NULL, NULL);
847 if (error1 != 0)
848 return (error1);
849 so = fp->f_data;
850 if (so->so_type == SOCK_DGRAM) {
851 fdrop(fp, td);
852 return (EOPNOTSUPP);
853 }
854 fdrop(fp, td);
855 }
856 return (error);
857 }
858 if (addr)
859 error = linux_sa_put(PTRIN(addr));
860 if (error != 0) {
861 (void)kern_close(td, td->td_retval[0]);
862 td->td_retval[0] = 0;
863 }
864 return (error);
865 }
866
867 int
868 linux_accept(struct thread *td, struct linux_accept_args *args)
869 {
870
871 return (linux_accept_common(td, args->s, args->addr,
872 args->namelen, 0));
873 }
874
875 int
876 linux_accept4(struct thread *td, struct linux_accept4_args *args)
877 {
878
879 return (linux_accept_common(td, args->s, args->addr,
880 args->namelen, args->flags));
881 }
882
883 int
884 linux_getsockname(struct thread *td, struct linux_getsockname_args *args)
885 {
886 struct getsockname_args /* {
887 int fdes;
888 struct sockaddr * __restrict asa;
889 socklen_t * __restrict alen;
890 } */ bsd_args;
891 int error;
892
893 bsd_args.fdes = args->s;
894 bsd_args.asa = (struct sockaddr * __restrict)PTRIN(args->addr);
895 bsd_args.alen = PTRIN(args->namelen);
896 error = sys_getsockname(td, &bsd_args);
897 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa);
898 if (error != 0)
899 return (error);
900 return (linux_sa_put(PTRIN(args->addr)));
901 }
902
903 int
904 linux_getpeername(struct thread *td, struct linux_getpeername_args *args)
905 {
906 struct getpeername_args /* {
907 int fdes;
908 caddr_t asa;
909 int *alen;
910 } */ bsd_args;
911 int error;
912
913 bsd_args.fdes = args->s;
914 bsd_args.asa = (struct sockaddr *)PTRIN(args->addr);
915 bsd_args.alen = (socklen_t *)PTRIN(args->namelen);
916 error = sys_getpeername(td, &bsd_args);
917 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa);
918 if (error != 0)
919 return (error);
920 return (linux_sa_put(PTRIN(args->addr)));
921 }
922
923 int
924 linux_socketpair(struct thread *td, struct linux_socketpair_args *args)
925 {
926 struct socketpair_args /* {
927 int domain;
928 int type;
929 int protocol;
930 int *rsv;
931 } */ bsd_args;
932 int error;
933
934 bsd_args.domain = linux_to_bsd_domain(args->domain);
935 if (bsd_args.domain != PF_LOCAL)
936 return (EAFNOSUPPORT);
937 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK;
938 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX)
939 return (EINVAL);
940 error = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK,
941 &bsd_args.type);
942 if (error != 0)
943 return (error);
944 if (args->protocol != 0 && args->protocol != PF_UNIX)
945
946 /*
947 * Use of PF_UNIX as protocol argument is not right,
948 * but Linux does it.
949 * Do not map PF_UNIX as its Linux value is identical
950 * to FreeBSD one.
951 */
952 return (EPROTONOSUPPORT);
953 else
954 bsd_args.protocol = 0;
955 bsd_args.rsv = (int *)PTRIN(args->rsv);
956 return (sys_socketpair(td, &bsd_args));
957 }
958
959 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
960 struct linux_send_args {
961 register_t s;
962 register_t msg;
963 register_t len;
964 register_t flags;
965 };
966
967 static int
968 linux_send(struct thread *td, struct linux_send_args *args)
969 {
970 struct sendto_args /* {
971 int s;
972 caddr_t buf;
973 int len;
974 int flags;
975 caddr_t to;
976 int tolen;
977 } */ bsd_args;
978
979 bsd_args.s = args->s;
980 bsd_args.buf = (caddr_t)PTRIN(args->msg);
981 bsd_args.len = args->len;
982 bsd_args.flags = args->flags;
983 bsd_args.to = NULL;
984 bsd_args.tolen = 0;
985 return (sys_sendto(td, &bsd_args));
986 }
987
988 struct linux_recv_args {
989 register_t s;
990 register_t msg;
991 register_t len;
992 register_t flags;
993 };
994
995 static int
996 linux_recv(struct thread *td, struct linux_recv_args *args)
997 {
998 struct recvfrom_args /* {
999 int s;
1000 caddr_t buf;
1001 int len;
1002 int flags;
1003 struct sockaddr *from;
1004 socklen_t fromlenaddr;
1005 } */ bsd_args;
1006
1007 bsd_args.s = args->s;
1008 bsd_args.buf = (caddr_t)PTRIN(args->msg);
1009 bsd_args.len = args->len;
1010 bsd_args.flags = linux_to_bsd_msg_flags(args->flags);
1011 bsd_args.from = NULL;
1012 bsd_args.fromlenaddr = 0;
1013 return (sys_recvfrom(td, &bsd_args));
1014 }
1015 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1016
1017 int
1018 linux_sendto(struct thread *td, struct linux_sendto_args *args)
1019 {
1020 struct msghdr msg;
1021 struct iovec aiov;
1022
1023 if (linux_check_hdrincl(td, args->s) == 0)
1024 /* IP_HDRINCL set, tweak the packet before sending */
1025 return (linux_sendto_hdrincl(td, args));
1026
1027 msg.msg_name = PTRIN(args->to);
1028 msg.msg_namelen = args->tolen;
1029 msg.msg_iov = &aiov;
1030 msg.msg_iovlen = 1;
1031 msg.msg_control = NULL;
1032 msg.msg_flags = 0;
1033 aiov.iov_base = PTRIN(args->msg);
1034 aiov.iov_len = args->len;
1035 return (linux_sendit(td, args->s, &msg, args->flags, NULL,
1036 UIO_USERSPACE));
1037 }
1038
1039 int
1040 linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args)
1041 {
1042 struct msghdr msg;
1043 struct iovec aiov;
1044 int error, fromlen;
1045
1046 if (PTRIN(args->fromlen) != NULL) {
1047 error = copyin(PTRIN(args->fromlen), &fromlen,
1048 sizeof(fromlen));
1049 if (error != 0)
1050 return (error);
1051 if (fromlen < 0)
1052 return (EINVAL);
1053 msg.msg_namelen = fromlen;
1054 } else
1055 msg.msg_namelen = 0;
1056
1057 msg.msg_name = (struct sockaddr * __restrict)PTRIN(args->from);
1058 msg.msg_iov = &aiov;
1059 msg.msg_iovlen = 1;
1060 aiov.iov_base = PTRIN(args->buf);
1061 aiov.iov_len = args->len;
1062 msg.msg_control = 0;
1063 msg.msg_flags = linux_to_bsd_msg_flags(args->flags);
1064
1065 error = kern_recvit(td, args->s, &msg, UIO_USERSPACE, NULL);
1066 if (error != 0)
1067 return (error);
1068
1069 if (PTRIN(args->from) != NULL) {
1070 error = bsd_to_linux_sockaddr((struct sockaddr *)
1071 PTRIN(args->from));
1072 if (error != 0)
1073 return (error);
1074
1075 error = linux_sa_put((struct osockaddr *)
1076 PTRIN(args->from));
1077 }
1078
1079 if (PTRIN(args->fromlen) != NULL)
1080 error = copyout(&msg.msg_namelen, PTRIN(args->fromlen),
1081 sizeof(msg.msg_namelen));
1082
1083 return (error);
1084 }
1085
1086 static int
1087 linux_sendmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr,
1088 l_uint flags)
1089 {
1090 struct cmsghdr *cmsg;
1091 struct cmsgcred cmcred;
1092 struct mbuf *control;
1093 struct msghdr msg;
1094 struct l_cmsghdr linux_cmsg;
1095 struct l_cmsghdr *ptr_cmsg;
1096 struct l_msghdr linux_msg;
1097 struct iovec *iov;
1098 socklen_t datalen;
1099 struct sockaddr *sa;
1100 sa_family_t sa_family;
1101 void *data;
1102 int error;
1103
1104 error = copyin(msghdr, &linux_msg, sizeof(linux_msg));
1105 if (error != 0)
1106 return (error);
1107
1108 /*
1109 * Some Linux applications (ping) define a non-NULL control data
1110 * pointer, but a msg_controllen of 0, which is not allowed in the
1111 * FreeBSD system call interface. NULL the msg_control pointer in
1112 * order to handle this case. This should be checked, but allows the
1113 * Linux ping to work.
1114 */
1115 if (PTRIN(linux_msg.msg_control) != NULL && linux_msg.msg_controllen == 0)
1116 linux_msg.msg_control = PTROUT(NULL);
1117
1118 error = linux_to_bsd_msghdr(&msg, &linux_msg);
1119 if (error != 0)
1120 return (error);
1121
1122 #ifdef COMPAT_LINUX32
1123 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen,
1124 &iov, EMSGSIZE);
1125 #else
1126 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
1127 #endif
1128 if (error != 0)
1129 return (error);
1130
1131 control = NULL;
1132 cmsg = NULL;
1133
1134 if ((ptr_cmsg = LINUX_CMSG_FIRSTHDR(&linux_msg)) != NULL) {
1135 error = kern_getsockname(td, s, &sa, &datalen);
1136 if (error != 0)
1137 goto bad;
1138 sa_family = sa->sa_family;
1139 free(sa, M_SONAME);
1140
1141 error = ENOBUFS;
1142 cmsg = malloc(CMSG_HDRSZ, M_LINUX, M_WAITOK|M_ZERO);
1143 control = m_get(M_WAITOK, MT_CONTROL);
1144
1145 do {
1146 error = copyin(ptr_cmsg, &linux_cmsg,
1147 sizeof(struct l_cmsghdr));
1148 if (error != 0)
1149 goto bad;
1150
1151 error = EINVAL;
1152 if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr))
1153 goto bad;
1154
1155 /*
1156 * Now we support only SCM_RIGHTS and SCM_CRED,
1157 * so return EINVAL in any other cmsg_type
1158 */
1159 cmsg->cmsg_type =
1160 linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type);
1161 cmsg->cmsg_level =
1162 linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level);
1163 if (cmsg->cmsg_type == -1
1164 || cmsg->cmsg_level != SOL_SOCKET)
1165 goto bad;
1166
1167 /*
1168 * Some applications (e.g. pulseaudio) attempt to
1169 * send ancillary data even if the underlying protocol
1170 * doesn't support it which is not allowed in the
1171 * FreeBSD system call interface.
1172 */
1173 if (sa_family != AF_UNIX)
1174 continue;
1175
1176 data = LINUX_CMSG_DATA(ptr_cmsg);
1177 datalen = linux_cmsg.cmsg_len - L_CMSG_HDRSZ;
1178
1179 switch (cmsg->cmsg_type)
1180 {
1181 case SCM_RIGHTS:
1182 break;
1183
1184 case SCM_CREDS:
1185 data = &cmcred;
1186 datalen = sizeof(cmcred);
1187
1188 /*
1189 * The lower levels will fill in the structure
1190 */
1191 bzero(data, datalen);
1192 break;
1193 }
1194
1195 cmsg->cmsg_len = CMSG_LEN(datalen);
1196
1197 error = ENOBUFS;
1198 if (!m_append(control, CMSG_HDRSZ, (c_caddr_t)cmsg))
1199 goto bad;
1200 if (!m_append(control, datalen, (c_caddr_t)data))
1201 goto bad;
1202 } while ((ptr_cmsg = LINUX_CMSG_NXTHDR(&linux_msg, ptr_cmsg)));
1203
1204 if (m_length(control, NULL) == 0) {
1205 m_freem(control);
1206 control = NULL;
1207 }
1208 }
1209
1210 msg.msg_iov = iov;
1211 msg.msg_flags = 0;
1212 error = linux_sendit(td, s, &msg, flags, control, UIO_USERSPACE);
1213 control = NULL;
1214
1215 bad:
1216 m_freem(control);
1217 free(iov, M_IOV);
1218 if (cmsg)
1219 free(cmsg, M_LINUX);
1220 return (error);
1221 }
1222
1223 int
1224 linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args)
1225 {
1226
1227 return (linux_sendmsg_common(td, args->s, PTRIN(args->msg),
1228 args->flags));
1229 }
1230
1231 int
1232 linux_sendmmsg(struct thread *td, struct linux_sendmmsg_args *args)
1233 {
1234 struct l_mmsghdr *msg;
1235 l_uint retval;
1236 int error, datagrams;
1237
1238 if (args->vlen > UIO_MAXIOV)
1239 args->vlen = UIO_MAXIOV;
1240
1241 msg = PTRIN(args->msg);
1242 datagrams = 0;
1243 while (datagrams < args->vlen) {
1244 error = linux_sendmsg_common(td, args->s, &msg->msg_hdr,
1245 args->flags);
1246 if (error != 0)
1247 break;
1248
1249 retval = td->td_retval[0];
1250 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len));
1251 if (error != 0)
1252 break;
1253 ++msg;
1254 ++datagrams;
1255 }
1256 if (error == 0)
1257 td->td_retval[0] = datagrams;
1258 return (error);
1259 }
1260
1261 static int
1262 linux_recvmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr,
1263 l_uint flags, struct msghdr *msg)
1264 {
1265 struct cmsghdr *cm;
1266 struct cmsgcred *cmcred;
1267 struct l_cmsghdr *linux_cmsg = NULL;
1268 struct l_ucred linux_ucred;
1269 socklen_t datalen, outlen;
1270 struct l_msghdr linux_msg;
1271 struct iovec *iov, *uiov;
1272 struct mbuf *control = NULL;
1273 struct mbuf **controlp;
1274 struct timeval *ftmvl;
1275 l_timeval ltmvl;
1276 caddr_t outbuf;
1277 void *data;
1278 int error, i, fd, fds, *fdp;
1279
1280 error = copyin(msghdr, &linux_msg, sizeof(linux_msg));
1281 if (error != 0)
1282 return (error);
1283
1284 error = linux_to_bsd_msghdr(msg, &linux_msg);
1285 if (error != 0)
1286 return (error);
1287
1288 #ifdef COMPAT_LINUX32
1289 error = linux32_copyiniov(PTRIN(msg->msg_iov), msg->msg_iovlen,
1290 &iov, EMSGSIZE);
1291 #else
1292 error = copyiniov(msg->msg_iov, msg->msg_iovlen, &iov, EMSGSIZE);
1293 #endif
1294 if (error != 0)
1295 return (error);
1296
1297 if (msg->msg_name) {
1298 error = linux_to_bsd_sockaddr((struct sockaddr *)msg->msg_name,
1299 msg->msg_namelen);
1300 if (error != 0)
1301 goto bad;
1302 }
1303
1304 uiov = msg->msg_iov;
1305 msg->msg_iov = iov;
1306 controlp = (msg->msg_control != NULL) ? &control : NULL;
1307 error = kern_recvit(td, s, msg, UIO_USERSPACE, controlp);
1308 msg->msg_iov = uiov;
1309 if (error != 0)
1310 goto bad;
1311
1312 error = bsd_to_linux_msghdr(msg, &linux_msg);
1313 if (error != 0)
1314 goto bad;
1315
1316 if (linux_msg.msg_name) {
1317 error = bsd_to_linux_sockaddr((struct sockaddr *)
1318 PTRIN(linux_msg.msg_name));
1319 if (error != 0)
1320 goto bad;
1321 }
1322 if (linux_msg.msg_name && linux_msg.msg_namelen > 2) {
1323 error = linux_sa_put(PTRIN(linux_msg.msg_name));
1324 if (error != 0)
1325 goto bad;
1326 }
1327
1328 outbuf = PTRIN(linux_msg.msg_control);
1329 outlen = 0;
1330
1331 if (control) {
1332 linux_cmsg = malloc(L_CMSG_HDRSZ, M_LINUX, M_WAITOK | M_ZERO);
1333
1334 msg->msg_control = mtod(control, struct cmsghdr *);
1335 msg->msg_controllen = control->m_len;
1336
1337 cm = CMSG_FIRSTHDR(msg);
1338
1339 while (cm != NULL) {
1340 linux_cmsg->cmsg_type =
1341 bsd_to_linux_cmsg_type(cm->cmsg_type);
1342 linux_cmsg->cmsg_level =
1343 bsd_to_linux_sockopt_level(cm->cmsg_level);
1344 if (linux_cmsg->cmsg_type == -1
1345 || cm->cmsg_level != SOL_SOCKET)
1346 {
1347 error = EINVAL;
1348 goto bad;
1349 }
1350
1351 data = CMSG_DATA(cm);
1352 datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data;
1353
1354 switch (cm->cmsg_type)
1355 {
1356 case SCM_RIGHTS:
1357 if (flags & LINUX_MSG_CMSG_CLOEXEC) {
1358 fds = datalen / sizeof(int);
1359 fdp = data;
1360 for (i = 0; i < fds; i++) {
1361 fd = *fdp++;
1362 (void)kern_fcntl(td, fd,
1363 F_SETFD, FD_CLOEXEC);
1364 }
1365 }
1366 break;
1367
1368 case SCM_CREDS:
1369 /*
1370 * Currently LOCAL_CREDS is never in
1371 * effect for Linux so no need to worry
1372 * about sockcred
1373 */
1374 if (datalen != sizeof(*cmcred)) {
1375 error = EMSGSIZE;
1376 goto bad;
1377 }
1378 cmcred = (struct cmsgcred *)data;
1379 bzero(&linux_ucred, sizeof(linux_ucred));
1380 linux_ucred.pid = cmcred->cmcred_pid;
1381 linux_ucred.uid = cmcred->cmcred_uid;
1382 linux_ucred.gid = cmcred->cmcred_gid;
1383 data = &linux_ucred;
1384 datalen = sizeof(linux_ucred);
1385 break;
1386
1387 case SCM_TIMESTAMP:
1388 if (datalen != sizeof(struct timeval)) {
1389 error = EMSGSIZE;
1390 goto bad;
1391 }
1392 ftmvl = (struct timeval *)data;
1393 ltmvl.tv_sec = ftmvl->tv_sec;
1394 ltmvl.tv_usec = ftmvl->tv_usec;
1395 data = <mvl;
1396 datalen = sizeof(ltmvl);
1397 break;
1398 }
1399
1400 if (outlen + LINUX_CMSG_LEN(datalen) >
1401 linux_msg.msg_controllen) {
1402 if (outlen == 0) {
1403 error = EMSGSIZE;
1404 goto bad;
1405 } else {
1406 linux_msg.msg_flags |=
1407 LINUX_MSG_CTRUNC;
1408 goto out;
1409 }
1410 }
1411
1412 linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen);
1413
1414 error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ);
1415 if (error != 0)
1416 goto bad;
1417 outbuf += L_CMSG_HDRSZ;
1418
1419 error = copyout(data, outbuf, datalen);
1420 if (error != 0)
1421 goto bad;
1422
1423 outbuf += LINUX_CMSG_ALIGN(datalen);
1424 outlen += LINUX_CMSG_LEN(datalen);
1425
1426 cm = CMSG_NXTHDR(msg, cm);
1427 }
1428 }
1429
1430 out:
1431 linux_msg.msg_controllen = outlen;
1432 error = copyout(&linux_msg, msghdr, sizeof(linux_msg));
1433
1434 bad:
1435 free(iov, M_IOV);
1436 m_freem(control);
1437 free(linux_cmsg, M_LINUX);
1438
1439 return (error);
1440 }
1441
1442 int
1443 linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args)
1444 {
1445 struct msghdr bsd_msg;
1446
1447 return (linux_recvmsg_common(td, args->s, PTRIN(args->msg),
1448 args->flags, &bsd_msg));
1449 }
1450
1451 int
1452 linux_recvmmsg(struct thread *td, struct linux_recvmmsg_args *args)
1453 {
1454 struct l_mmsghdr *msg;
1455 struct msghdr bsd_msg;
1456 struct l_timespec lts;
1457 struct timespec ts, tts;
1458 l_uint retval;
1459 int error, datagrams;
1460
1461 if (args->timeout) {
1462 error = copyin(args->timeout, <s, sizeof(struct l_timespec));
1463 if (error != 0)
1464 return (error);
1465 error = linux_to_native_timespec(&ts, <s);
1466 if (error != 0)
1467 return (error);
1468 getnanotime(&tts);
1469 timespecadd(&tts, &ts);
1470 }
1471
1472 msg = PTRIN(args->msg);
1473 datagrams = 0;
1474 while (datagrams < args->vlen) {
1475 error = linux_recvmsg_common(td, args->s, &msg->msg_hdr,
1476 args->flags & ~LINUX_MSG_WAITFORONE, &bsd_msg);
1477 if (error != 0)
1478 break;
1479
1480 retval = td->td_retval[0];
1481 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len));
1482 if (error != 0)
1483 break;
1484 ++msg;
1485 ++datagrams;
1486
1487 /*
1488 * MSG_WAITFORONE turns on MSG_DONTWAIT after one packet.
1489 */
1490 if (args->flags & LINUX_MSG_WAITFORONE)
1491 args->flags |= LINUX_MSG_DONTWAIT;
1492
1493 /*
1494 * See BUGS section of recvmmsg(2).
1495 */
1496 if (args->timeout) {
1497 getnanotime(&ts);
1498 timespecsub(&ts, &tts);
1499 if (!timespecisset(&ts) || ts.tv_sec > 0)
1500 break;
1501 }
1502 /* Out of band data, return right away. */
1503 if (bsd_msg.msg_flags & MSG_OOB)
1504 break;
1505 }
1506 if (error == 0)
1507 td->td_retval[0] = datagrams;
1508 return (error);
1509 }
1510
1511 int
1512 linux_shutdown(struct thread *td, struct linux_shutdown_args *args)
1513 {
1514
1515 return (kern_shutdown(td, args->s, args->how));
1516 }
1517
1518 int
1519 linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args)
1520 {
1521 struct setsockopt_args /* {
1522 int s;
1523 int level;
1524 int name;
1525 caddr_t val;
1526 int valsize;
1527 } */ bsd_args;
1528 l_timeval linux_tv;
1529 struct timeval tv;
1530 int error, name;
1531
1532 bsd_args.s = args->s;
1533 bsd_args.level = linux_to_bsd_sockopt_level(args->level);
1534 switch (bsd_args.level) {
1535 case SOL_SOCKET:
1536 name = linux_to_bsd_so_sockopt(args->optname);
1537 switch (name) {
1538 case SO_RCVTIMEO:
1539 /* FALLTHROUGH */
1540 case SO_SNDTIMEO:
1541 error = copyin(PTRIN(args->optval), &linux_tv,
1542 sizeof(linux_tv));
1543 if (error != 0)
1544 return (error);
1545 tv.tv_sec = linux_tv.tv_sec;
1546 tv.tv_usec = linux_tv.tv_usec;
1547 return (kern_setsockopt(td, args->s, bsd_args.level,
1548 name, &tv, UIO_SYSSPACE, sizeof(tv)));
1549 /* NOTREACHED */
1550 default:
1551 break;
1552 }
1553 break;
1554 case IPPROTO_IP:
1555 name = linux_to_bsd_ip_sockopt(args->optname);
1556 break;
1557 case IPPROTO_IPV6:
1558 name = linux_to_bsd_ip6_sockopt(args->optname);
1559 break;
1560 case IPPROTO_TCP:
1561 name = linux_to_bsd_tcp_sockopt(args->optname);
1562 break;
1563 default:
1564 name = -1;
1565 break;
1566 }
1567 if (name == -1)
1568 return (ENOPROTOOPT);
1569
1570 bsd_args.name = name;
1571 bsd_args.val = PTRIN(args->optval);
1572 bsd_args.valsize = args->optlen;
1573
1574 if (name == IPV6_NEXTHOP) {
1575 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val,
1576 bsd_args.valsize);
1577 error = sys_setsockopt(td, &bsd_args);
1578 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val);
1579 } else
1580 error = sys_setsockopt(td, &bsd_args);
1581
1582 return (error);
1583 }
1584
1585 int
1586 linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args)
1587 {
1588 struct getsockopt_args /* {
1589 int s;
1590 int level;
1591 int name;
1592 caddr_t val;
1593 int *avalsize;
1594 } */ bsd_args;
1595 l_timeval linux_tv;
1596 struct timeval tv;
1597 socklen_t tv_len, xulen, len;
1598 struct xucred xu;
1599 struct l_ucred lxu;
1600 int error, name, newval;
1601
1602 bsd_args.s = args->s;
1603 bsd_args.level = linux_to_bsd_sockopt_level(args->level);
1604 switch (bsd_args.level) {
1605 case SOL_SOCKET:
1606 name = linux_to_bsd_so_sockopt(args->optname);
1607 switch (name) {
1608 case SO_RCVTIMEO:
1609 /* FALLTHROUGH */
1610 case SO_SNDTIMEO:
1611 tv_len = sizeof(tv);
1612 error = kern_getsockopt(td, args->s, bsd_args.level,
1613 name, &tv, UIO_SYSSPACE, &tv_len);
1614 if (error != 0)
1615 return (error);
1616 linux_tv.tv_sec = tv.tv_sec;
1617 linux_tv.tv_usec = tv.tv_usec;
1618 return (copyout(&linux_tv, PTRIN(args->optval),
1619 sizeof(linux_tv)));
1620 /* NOTREACHED */
1621 case LOCAL_PEERCRED:
1622 if (args->optlen < sizeof(lxu))
1623 return (EINVAL);
1624 xulen = sizeof(xu);
1625 error = kern_getsockopt(td, args->s, bsd_args.level,
1626 name, &xu, UIO_SYSSPACE, &xulen);
1627 if (error != 0)
1628 return (error);
1629 /*
1630 * XXX Use 0 for pid as the FreeBSD does not cache peer pid.
1631 */
1632 lxu.pid = 0;
1633 lxu.uid = xu.cr_uid;
1634 lxu.gid = xu.cr_gid;
1635 return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu)));
1636 /* NOTREACHED */
1637 case SO_ERROR:
1638 len = sizeof(newval);
1639 error = kern_getsockopt(td, args->s, bsd_args.level,
1640 name, &newval, UIO_SYSSPACE, &len);
1641 if (error != 0)
1642 return (error);
1643 newval = -SV_ABI_ERRNO(td->td_proc, newval);
1644 return (copyout(&newval, PTRIN(args->optval), len));
1645 /* NOTREACHED */
1646 default:
1647 break;
1648 }
1649 break;
1650 case IPPROTO_IP:
1651 name = linux_to_bsd_ip_sockopt(args->optname);
1652 break;
1653 case IPPROTO_IPV6:
1654 name = linux_to_bsd_ip6_sockopt(args->optname);
1655 break;
1656 case IPPROTO_TCP:
1657 name = linux_to_bsd_tcp_sockopt(args->optname);
1658 break;
1659 default:
1660 name = -1;
1661 break;
1662 }
1663 if (name == -1)
1664 return (EINVAL);
1665
1666 bsd_args.name = name;
1667 bsd_args.val = PTRIN(args->optval);
1668 bsd_args.avalsize = PTRIN(args->optlen);
1669
1670 if (name == IPV6_NEXTHOP) {
1671 error = sys_getsockopt(td, &bsd_args);
1672 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val);
1673 } else
1674 error = sys_getsockopt(td, &bsd_args);
1675
1676 return (error);
1677 }
1678
1679 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1680
1681 /* Argument list sizes for linux_socketcall */
1682 static const unsigned char lxs_args_cnt[] = {
1683 0 /* unused*/, 3 /* socket */,
1684 3 /* bind */, 3 /* connect */,
1685 2 /* listen */, 3 /* accept */,
1686 3 /* getsockname */, 3 /* getpeername */,
1687 4 /* socketpair */, 4 /* send */,
1688 4 /* recv */, 6 /* sendto */,
1689 6 /* recvfrom */, 2 /* shutdown */,
1690 5 /* setsockopt */, 5 /* getsockopt */,
1691 3 /* sendmsg */, 3 /* recvmsg */,
1692 4 /* accept4 */, 5 /* recvmmsg */,
1693 4 /* sendmmsg */
1694 };
1695 #define LINUX_ARGS_CNT (nitems(lxs_args_cnt) - 1)
1696 #define LINUX_ARG_SIZE(x) (lxs_args_cnt[x] * sizeof(l_ulong))
1697
1698 int
1699 linux_socketcall(struct thread *td, struct linux_socketcall_args *args)
1700 {
1701 l_ulong a[6];
1702 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1703 register_t l_args[6];
1704 #endif
1705 void *arg;
1706 int error;
1707
1708 if (args->what < LINUX_SOCKET || args->what > LINUX_ARGS_CNT)
1709 return (EINVAL);
1710 error = copyin(PTRIN(args->args), a, LINUX_ARG_SIZE(args->what));
1711 if (error != 0)
1712 return (error);
1713
1714 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1715 for (int i = 0; i < lxs_args_cnt[args->what]; ++i)
1716 l_args[i] = a[i];
1717 arg = l_args;
1718 #else
1719 arg = a;
1720 #endif
1721 switch (args->what) {
1722 case LINUX_SOCKET:
1723 return (linux_socket(td, arg));
1724 case LINUX_BIND:
1725 return (linux_bind(td, arg));
1726 case LINUX_CONNECT:
1727 return (linux_connect(td, arg));
1728 case LINUX_LISTEN:
1729 return (linux_listen(td, arg));
1730 case LINUX_ACCEPT:
1731 return (linux_accept(td, arg));
1732 case LINUX_GETSOCKNAME:
1733 return (linux_getsockname(td, arg));
1734 case LINUX_GETPEERNAME:
1735 return (linux_getpeername(td, arg));
1736 case LINUX_SOCKETPAIR:
1737 return (linux_socketpair(td, arg));
1738 case LINUX_SEND:
1739 return (linux_send(td, arg));
1740 case LINUX_RECV:
1741 return (linux_recv(td, arg));
1742 case LINUX_SENDTO:
1743 return (linux_sendto(td, arg));
1744 case LINUX_RECVFROM:
1745 return (linux_recvfrom(td, arg));
1746 case LINUX_SHUTDOWN:
1747 return (linux_shutdown(td, arg));
1748 case LINUX_SETSOCKOPT:
1749 return (linux_setsockopt(td, arg));
1750 case LINUX_GETSOCKOPT:
1751 return (linux_getsockopt(td, arg));
1752 case LINUX_SENDMSG:
1753 return (linux_sendmsg(td, arg));
1754 case LINUX_RECVMSG:
1755 return (linux_recvmsg(td, arg));
1756 case LINUX_ACCEPT4:
1757 return (linux_accept4(td, arg));
1758 case LINUX_RECVMMSG:
1759 return (linux_recvmmsg(td, arg));
1760 case LINUX_SENDMMSG:
1761 return (linux_sendmmsg(td, arg));
1762 }
1763
1764 uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what);
1765 return (ENOSYS);
1766 }
1767 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
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