1/*-
2 * Copyright (c) 1995 S��ren 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: head/sys/compat/linux/linux_socket.c 276512 2015-01-01 20:53:38Z 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_socket.h>
74#include <compat/linux/linux_util.h>
75
76static int linux_to_bsd_domain(int);
77
78/*
79 * Reads a linux sockaddr and does any necessary translation.
80 * Linux sockaddrs don't have a length field, only a family.
81 * Copy the osockaddr structure pointed to by osa to kernel, adjust
82 * family and convert to sockaddr.
83 */
84static int
85linux_getsockaddr(struct sockaddr **sap, const struct osockaddr *osa, int salen)
86{
87 struct sockaddr *sa;
88 struct osockaddr *kosa;
89#ifdef INET6
90 struct sockaddr_in6 *sin6;
91 int oldv6size;
92#endif
93 char *name;
94 int bdom, error, hdrlen, namelen;
95
96 if (salen < 2 || salen > UCHAR_MAX || !osa)
97 return (EINVAL);
98
99#ifdef INET6
100 oldv6size = 0;
101 /*
102 * Check for old (pre-RFC2553) sockaddr_in6. We may accept it
103 * if it's a v4-mapped address, so reserve the proper space
104 * for it.
105 */
106 if (salen == sizeof(struct sockaddr_in6) - sizeof(uint32_t)) {
107 salen += sizeof(uint32_t);
108 oldv6size = 1;
109 }
110#endif
111
112 kosa = malloc(salen, M_SONAME, M_WAITOK);
113
114 if ((error = copyin(osa, kosa, salen)))
115 goto out;
116
117 bdom = linux_to_bsd_domain(kosa->sa_family);
118 if (bdom == -1) {
119 error = EAFNOSUPPORT;
120 goto out;
121 }
122
123#ifdef INET6
124 /*
125 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6,
126 * which lacks the scope id compared with RFC2553 one. If we detect
127 * the situation, reject the address and write a message to system log.
128 *
129 * Still accept addresses for which the scope id is not used.
130 */
131 if (oldv6size) {
132 if (bdom == AF_INET6) {
133 sin6 = (struct sockaddr_in6 *)kosa;
134 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) ||
135 (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
136 !IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
137 !IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) &&
138 !IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
139 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) {
140 sin6->sin6_scope_id = 0;
141 } else {
142 log(LOG_DEBUG,
143 "obsolete pre-RFC2553 sockaddr_in6 rejected\n");
144 error = EINVAL;
145 goto out;
146 }
147 } else
148 salen -= sizeof(uint32_t);
149 }
150#endif
151 if (bdom == AF_INET) {
152 if (salen < sizeof(struct sockaddr_in)) {
153 error = EINVAL;
154 goto out;
155 }
156 salen = sizeof(struct sockaddr_in);
157 }
158
159 if (bdom == AF_LOCAL && salen > sizeof(struct sockaddr_un)) {
160 hdrlen = offsetof(struct sockaddr_un, sun_path);
161 name = ((struct sockaddr_un *)kosa)->sun_path;
162 if (*name == '\0') {
163 /*
164 * Linux abstract namespace starts with a NULL byte.
165 * XXX We do not support abstract namespace yet.
166 */
167 namelen = strnlen(name + 1, salen - hdrlen - 1) + 1;
168 } else
169 namelen = strnlen(name, salen - hdrlen);
170 salen = hdrlen + namelen;
171 if (salen > sizeof(struct sockaddr_un)) {
172 error = ENAMETOOLONG;
173 goto out;
174 }
175 }
176
177 sa = (struct sockaddr *)kosa;
178 sa->sa_family = bdom;
179 sa->sa_len = salen;
180
181 *sap = sa;
182 return (0);
183
184out:
185 free(kosa, M_SONAME);
186 return (error);
187}
188
189static int
190linux_to_bsd_domain(int domain)
191{
192
193 switch (domain) {
194 case LINUX_AF_UNSPEC:
195 return (AF_UNSPEC);
196 case LINUX_AF_UNIX:
197 return (AF_LOCAL);
198 case LINUX_AF_INET:
199 return (AF_INET);
200 case LINUX_AF_INET6:
201 return (AF_INET6);
202 case LINUX_AF_AX25:
203 return (AF_CCITT);
204 case LINUX_AF_IPX:
205 return (AF_IPX);
206 case LINUX_AF_APPLETALK:
207 return (AF_APPLETALK);
208 }
209 return (-1);
210}
211
212static int
213bsd_to_linux_domain(int domain)
214{
215
216 switch (domain) {
217 case AF_UNSPEC:
218 return (LINUX_AF_UNSPEC);
219 case AF_LOCAL:
220 return (LINUX_AF_UNIX);
221 case AF_INET:
222 return (LINUX_AF_INET);
223 case AF_INET6:
224 return (LINUX_AF_INET6);
225 case AF_CCITT:
226 return (LINUX_AF_AX25);
227 case AF_IPX:
228 return (LINUX_AF_IPX);
229 case AF_APPLETALK:
230 return (LINUX_AF_APPLETALK);
231 }
232 return (-1);
233}
234
235static int
236linux_to_bsd_sockopt_level(int level)
237{
238
239 switch (level) {
240 case LINUX_SOL_SOCKET:
241 return (SOL_SOCKET);
242 }
243 return (level);
244}
245
246static int
247bsd_to_linux_sockopt_level(int level)
248{
249
250 switch (level) {
251 case SOL_SOCKET:
252 return (LINUX_SOL_SOCKET);
253 }
254 return (level);
255}
256
257static int
258linux_to_bsd_ip_sockopt(int opt)
259{
260
261 switch (opt) {
262 case LINUX_IP_TOS:
263 return (IP_TOS);
264 case LINUX_IP_TTL:
265 return (IP_TTL);
266 case LINUX_IP_OPTIONS:
267 return (IP_OPTIONS);
268 case LINUX_IP_MULTICAST_IF:
269 return (IP_MULTICAST_IF);
270 case LINUX_IP_MULTICAST_TTL:
271 return (IP_MULTICAST_TTL);
272 case LINUX_IP_MULTICAST_LOOP:
273 return (IP_MULTICAST_LOOP);
274 case LINUX_IP_ADD_MEMBERSHIP:
275 return (IP_ADD_MEMBERSHIP);
276 case LINUX_IP_DROP_MEMBERSHIP:
277 return (IP_DROP_MEMBERSHIP);
278 case LINUX_IP_HDRINCL:
279 return (IP_HDRINCL);
280 }
281 return (-1);
282}
283
284static int
285linux_to_bsd_so_sockopt(int opt)
286{
287
288 switch (opt) {
289 case LINUX_SO_DEBUG:
290 return (SO_DEBUG);
291 case LINUX_SO_REUSEADDR:
292 return (SO_REUSEADDR);
293 case LINUX_SO_TYPE:
294 return (SO_TYPE);
295 case LINUX_SO_ERROR:
296 return (SO_ERROR);
297 case LINUX_SO_DONTROUTE:
298 return (SO_DONTROUTE);
299 case LINUX_SO_BROADCAST:
300 return (SO_BROADCAST);
301 case LINUX_SO_SNDBUF:
302 return (SO_SNDBUF);
303 case LINUX_SO_RCVBUF:
304 return (SO_RCVBUF);
305 case LINUX_SO_KEEPALIVE:
306 return (SO_KEEPALIVE);
307 case LINUX_SO_OOBINLINE:
308 return (SO_OOBINLINE);
309 case LINUX_SO_LINGER:
310 return (SO_LINGER);
311 case LINUX_SO_PEERCRED:
312 return (LOCAL_PEERCRED);
313 case LINUX_SO_RCVLOWAT:
314 return (SO_RCVLOWAT);
315 case LINUX_SO_SNDLOWAT:
316 return (SO_SNDLOWAT);
317 case LINUX_SO_RCVTIMEO:
318 return (SO_RCVTIMEO);
319 case LINUX_SO_SNDTIMEO:
320 return (SO_SNDTIMEO);
321 case LINUX_SO_TIMESTAMP:
322 return (SO_TIMESTAMP);
323 case LINUX_SO_ACCEPTCONN:
324 return (SO_ACCEPTCONN);
325 }
326 return (-1);
327}
328
329static int
330linux_to_bsd_tcp_sockopt(int opt)
331{
332
333 switch (opt) {
334 case LINUX_TCP_NODELAY:
335 return (TCP_NODELAY);
336 case LINUX_TCP_MAXSEG:
337 return (TCP_MAXSEG);
338 case LINUX_TCP_KEEPIDLE:
339 return (TCP_KEEPIDLE);
340 case LINUX_TCP_KEEPINTVL:
341 return (TCP_KEEPINTVL);
342 case LINUX_TCP_KEEPCNT:
343 return (TCP_KEEPCNT);
344 case LINUX_TCP_MD5SIG:
345 return (TCP_MD5SIG);
346 }
347 return (-1);
348}
349
350static int
351linux_to_bsd_msg_flags(int flags)
352{
353 int ret_flags = 0;
354
355 if (flags & LINUX_MSG_OOB)
356 ret_flags |= MSG_OOB;
357 if (flags & LINUX_MSG_PEEK)
358 ret_flags |= MSG_PEEK;
359 if (flags & LINUX_MSG_DONTROUTE)
360 ret_flags |= MSG_DONTROUTE;
361 if (flags & LINUX_MSG_CTRUNC)
362 ret_flags |= MSG_CTRUNC;
363 if (flags & LINUX_MSG_TRUNC)
364 ret_flags |= MSG_TRUNC;
365 if (flags & LINUX_MSG_DONTWAIT)
366 ret_flags |= MSG_DONTWAIT;
367 if (flags & LINUX_MSG_EOR)
368 ret_flags |= MSG_EOR;
369 if (flags & LINUX_MSG_WAITALL)
370 ret_flags |= MSG_WAITALL;
371 if (flags & LINUX_MSG_NOSIGNAL)
372 ret_flags |= MSG_NOSIGNAL;
373#if 0 /* not handled */
374 if (flags & LINUX_MSG_PROXY)
375 ;
376 if (flags & LINUX_MSG_FIN)
377 ;
378 if (flags & LINUX_MSG_SYN)
379 ;
380 if (flags & LINUX_MSG_CONFIRM)
381 ;
382 if (flags & LINUX_MSG_RST)
383 ;
384 if (flags & LINUX_MSG_ERRQUEUE)
385 ;
386#endif
387 return ret_flags;
388}
389
390/*
391* If bsd_to_linux_sockaddr() or linux_to_bsd_sockaddr() faults, then the
392* native syscall will fault. Thus, we don't really need to check the
393* return values for these functions.
394*/
395
396static int
397bsd_to_linux_sockaddr(struct sockaddr *arg)
398{
399 struct sockaddr sa;
400 size_t sa_len = sizeof(struct sockaddr);
401 int error;
402
403 if ((error = copyin(arg, &sa, sa_len)))
404 return (error);
405
406 *(u_short *)&sa = sa.sa_family;
407
408 error = copyout(&sa, arg, sa_len);
409
410 return (error);
411}
412
413static int
414linux_to_bsd_sockaddr(struct sockaddr *arg, int len)
415{
416 struct sockaddr sa;
417 size_t sa_len = sizeof(struct sockaddr);
418 int error;
419
420 if ((error = copyin(arg, &sa, sa_len)))
421 return (error);
422
423 sa.sa_family = *(sa_family_t *)&sa;
424 sa.sa_len = len;
425
426 error = copyout(&sa, arg, sa_len);
427
428 return (error);
429}
430
431
432static int
433linux_sa_put(struct osockaddr *osa)
434{
435 struct osockaddr sa;
436 int error, bdom;
437
438 /*
439 * Only read/write the osockaddr family part, the rest is
440 * not changed.
441 */
442 error = copyin(osa, &sa, sizeof(sa.sa_family));
443 if (error)
444 return (error);
445
446 bdom = bsd_to_linux_domain(sa.sa_family);
447 if (bdom == -1)
448 return (EINVAL);
449
450 sa.sa_family = bdom;
451 error = copyout(&sa, osa, sizeof(sa.sa_family));
452 if (error)
453 return (error);
454
455 return (0);
456}
457
458static int
459linux_to_bsd_cmsg_type(int cmsg_type)
460{
461
462 switch (cmsg_type) {
463 case LINUX_SCM_RIGHTS:
464 return (SCM_RIGHTS);
465 case LINUX_SCM_CREDENTIALS:
466 return (SCM_CREDS);
467 }
468 return (-1);
469}
470
471static int
472bsd_to_linux_cmsg_type(int cmsg_type)
473{
474
475 switch (cmsg_type) {
476 case SCM_RIGHTS:
477 return (LINUX_SCM_RIGHTS);
478 case SCM_CREDS:
479 return (LINUX_SCM_CREDENTIALS);
480 }
481 return (-1);
482}
483
484static int
485linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr)
486{
487 if (lhdr->msg_controllen > INT_MAX)
488 return (ENOBUFS);
489
490 bhdr->msg_name = PTRIN(lhdr->msg_name);
491 bhdr->msg_namelen = lhdr->msg_namelen;
492 bhdr->msg_iov = PTRIN(lhdr->msg_iov);
493 bhdr->msg_iovlen = lhdr->msg_iovlen;
494 bhdr->msg_control = PTRIN(lhdr->msg_control);
495
496 /*
497 * msg_controllen is skipped since BSD and LINUX control messages
498 * are potentially different sizes (e.g. the cred structure used
499 * by SCM_CREDS is different between the two operating system).
500 *
501 * The caller can set it (if necessary) after converting all the
502 * control messages.
503 */
504
505 bhdr->msg_flags = linux_to_bsd_msg_flags(lhdr->msg_flags);
506 return (0);
507}
508
509static int
510bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr)
511{
512 lhdr->msg_name = PTROUT(bhdr->msg_name);
513 lhdr->msg_namelen = bhdr->msg_namelen;
514 lhdr->msg_iov = PTROUT(bhdr->msg_iov);
515 lhdr->msg_iovlen = bhdr->msg_iovlen;
516 lhdr->msg_control = PTROUT(bhdr->msg_control);
517
518 /*
519 * msg_controllen is skipped since BSD and LINUX control messages
520 * are potentially different sizes (e.g. the cred structure used
521 * by SCM_CREDS is different between the two operating system).
522 *
523 * The caller can set it (if necessary) after converting all the
524 * control messages.
525 */
526
527 /* msg_flags skipped */
528 return (0);
529}
530
531static int
532linux_set_socket_flags(struct thread *td, int s, int flags)
533{
534 int error;
535
536 if (flags & LINUX_SOCK_NONBLOCK) {
537 error = kern_fcntl(td, s, F_SETFL, O_NONBLOCK);
538 if (error)
539 return (error);
540 }
541 if (flags & LINUX_SOCK_CLOEXEC) {
542 error = kern_fcntl(td, s, F_SETFD, FD_CLOEXEC);
543 if (error)
544 return (error);
545 }
546 return (0);
547}
548
549static int
550linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags,
551 struct mbuf *control, enum uio_seg segflg)
552{
553 struct sockaddr *to;
554 int error;
555
556 if (mp->msg_name != NULL) {
557 error = linux_getsockaddr(&to, mp->msg_name, mp->msg_namelen);
558 if (error)
559 return (error);
560 mp->msg_name = to;
561 } else
562 to = NULL;
563
564 error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control,
565 segflg);
566
567 if (to)
568 free(to, M_SONAME);
569 return (error);
570}
571
572/* Return 0 if IP_HDRINCL is set for the given socket. */
573static int
574linux_check_hdrincl(struct thread *td, int s)
575{
576 int error, optval;
577 socklen_t size_val;
578
579 size_val = sizeof(optval);
580 error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL,
581 &optval, UIO_SYSSPACE, &size_val);
582 if (error)
583 return (error);
584
585 return (optval == 0);
586}
587
588struct linux_sendto_args {
589 int s;
590 l_uintptr_t msg;
591 int len;
592 int flags;
593 l_uintptr_t to;
594 int tolen;
595};
596
597/*
598 * Updated sendto() when IP_HDRINCL is set:
599 * tweak endian-dependent fields in the IP packet.
600 */
601static int
602linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args)
603{
604/*
605 * linux_ip_copysize defines how many bytes we should copy
606 * from the beginning of the IP packet before we customize it for BSD.
607 * It should include all the fields we modify (ip_len and ip_off).
608 */
609#define linux_ip_copysize 8
610
611 struct ip *packet;
612 struct msghdr msg;
613 struct iovec aiov[1];
614 int error;
615
616 /* Check that the packet isn't too big or too small. */
617 if (linux_args->len < linux_ip_copysize ||
618 linux_args->len > IP_MAXPACKET)
619 return (EINVAL);
620
621 packet = (struct ip *)malloc(linux_args->len, M_TEMP, M_WAITOK);
622
623 /* Make kernel copy of the packet to be sent */
624 if ((error = copyin(PTRIN(linux_args->msg), packet,
625 linux_args->len)))
626 goto goout;
627
628 /* Convert fields from Linux to BSD raw IP socket format */
629 packet->ip_len = linux_args->len;
630 packet->ip_off = ntohs(packet->ip_off);
631
632 /* Prepare the msghdr and iovec structures describing the new packet */
633 msg.msg_name = PTRIN(linux_args->to);
634 msg.msg_namelen = linux_args->tolen;
635 msg.msg_iov = aiov;
636 msg.msg_iovlen = 1;
637 msg.msg_control = NULL;
638 msg.msg_flags = 0;
639 aiov[0].iov_base = (char *)packet;
640 aiov[0].iov_len = linux_args->len;
641 error = linux_sendit(td, linux_args->s, &msg, linux_args->flags,
642 NULL, UIO_SYSSPACE);
643goout:
644 free(packet, M_TEMP);
645 return (error);
646}
647
648struct linux_socket_args {
649 int domain;
650 int type;
651 int protocol;
652};
653
654static int
655linux_socket(struct thread *td, struct linux_socket_args *args)
656{
657 struct socket_args /* {
658 int domain;
659 int type;
660 int protocol;
661 } */ bsd_args;
662 int retval_socket, socket_flags;
663
664 bsd_args.protocol = args->protocol;
665 socket_flags = args->type & ~LINUX_SOCK_TYPE_MASK;
666 if (socket_flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK))
667 return (EINVAL);
668 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK;
669 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX)
670 return (EINVAL);
671 bsd_args.domain = linux_to_bsd_domain(args->domain);
672 if (bsd_args.domain == -1)
673 return (EAFNOSUPPORT);
674
675 retval_socket = sys_socket(td, &bsd_args);
676 if (retval_socket)
677 return (retval_socket);
678
679 retval_socket = linux_set_socket_flags(td, td->td_retval[0],
680 socket_flags);
681 if (retval_socket) {
682 (void)kern_close(td, td->td_retval[0]);
683 goto out;
684 }
685
686 if (bsd_args.type == SOCK_RAW
687 && (bsd_args.protocol == IPPROTO_RAW || bsd_args.protocol == 0)
688 && bsd_args.domain == PF_INET) {
689 /* It's a raw IP socket: set the IP_HDRINCL option. */
690 int hdrincl;
691
692 hdrincl = 1;
693 /* We ignore any error returned by kern_setsockopt() */
694 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL,
695 &hdrincl, UIO_SYSSPACE, sizeof(hdrincl));
696 }
697#ifdef INET6
698 /*
699 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default
700 * and some apps depend on this. So, set V6ONLY to 0 for Linux apps.
701 * For simplicity we do this unconditionally of the net.inet6.ip6.v6only
702 * sysctl value.
703 */
704 if (bsd_args.domain == PF_INET6) {
705 int v6only;
706
707 v6only = 0;
708 /* We ignore any error returned by setsockopt() */
709 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY,
710 &v6only, UIO_SYSSPACE, sizeof(v6only));
711 }
712#endif
713
714out:
715 return (retval_socket);
716}
717
718struct linux_bind_args {
719 int s;
720 l_uintptr_t name;
721 int namelen;
722};
723
724static int
725linux_bind(struct thread *td, struct linux_bind_args *args)
726{
727 struct sockaddr *sa;
728 int error;
729
730 error = linux_getsockaddr(&sa, PTRIN(args->name),
731 args->namelen);
732 if (error)
733 return (error);
734
735 error = kern_bindat(td, AT_FDCWD, args->s, sa);
736 free(sa, M_SONAME);
737 if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in))
738 return (EINVAL);
739 return (error);
740}
741
742struct linux_connect_args {
743 int s;
744 l_uintptr_t name;
745 int namelen;
746};
747int linux_connect(struct thread *, struct linux_connect_args *);
748
749int
750linux_connect(struct thread *td, struct linux_connect_args *args)
751{
752 cap_rights_t rights;
753 struct socket *so;
754 struct sockaddr *sa;
755 u_int fflag;
756 int error;
757
758 error = linux_getsockaddr(&sa, (struct osockaddr *)PTRIN(args->name),
759 args->namelen);
760 if (error)
761 return (error);
762
763 error = kern_connectat(td, AT_FDCWD, args->s, sa);
764 free(sa, M_SONAME);
765 if (error != EISCONN)
766 return (error);
767
768 /*
769 * Linux doesn't return EISCONN the first time it occurs,
770 * when on a non-blocking socket. Instead it returns the
771 * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD.
772 *
773 * XXXRW: Instead of using fgetsock(), check that it is a
774 * socket and use the file descriptor reference instead of
775 * creating a new one.
776 */
777 error = fgetsock(td, args->s, cap_rights_init(&rights, CAP_CONNECT),
778 &so, &fflag);
779 if (error == 0) {
780 error = EISCONN;
781 if (fflag & FNONBLOCK) {
782 SOCK_LOCK(so);
783 if (so->so_emuldata == 0)
784 error = so->so_error;
785 so->so_emuldata = (void *)1;
786 SOCK_UNLOCK(so);
787 }
788 fputsock(so);
789 }
790 return (error);
791}
792
793struct linux_listen_args {
794 int s;
795 int backlog;
796};
797
798static int
799linux_listen(struct thread *td, struct linux_listen_args *args)
800{
801 struct listen_args /* {
802 int s;
803 int backlog;
804 } */ bsd_args;
805
806 bsd_args.s = args->s;
807 bsd_args.backlog = args->backlog;
808 return (sys_listen(td, &bsd_args));
809}
810
811static int
812linux_accept_common(struct thread *td, int s, l_uintptr_t addr,
813 l_uintptr_t namelen, int flags)
814{
815 struct accept_args /* {
816 int s;
817 struct sockaddr * __restrict name;
818 socklen_t * __restrict anamelen;
819 } */ bsd_args;
820 int error;
821
822 if (flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK))
823 return (EINVAL);
824
825 bsd_args.s = s;
826 /* XXX: */
827 bsd_args.name = (struct sockaddr * __restrict)PTRIN(addr);
828 bsd_args.anamelen = PTRIN(namelen);/* XXX */
829 error = sys_accept(td, &bsd_args);
830 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.name);
831 if (error) {
832 if (error == EFAULT && namelen != sizeof(struct sockaddr_in))
833 return (EINVAL);
834 return (error);
835 }
836
837 /*
838 * linux appears not to copy flags from the parent socket to the
839 * accepted one, so we must clear the flags in the new descriptor
840 * and apply the requested flags.
841 */
842 error = kern_fcntl(td, td->td_retval[0], F_SETFL, 0);
843 if (error)
844 goto out;
845 error = linux_set_socket_flags(td, td->td_retval[0], flags);
846 if (error)
847 goto out;
848 if (addr)
849 error = linux_sa_put(PTRIN(addr));
850
851out:
852 if (error) {
853 (void)kern_close(td, td->td_retval[0]);
854 td->td_retval[0] = 0;
855 }
856 return (error);
857}
858
859struct linux_accept_args {
860 int s;
861 l_uintptr_t addr;
862 l_uintptr_t namelen;
863};
864
865static int
866linux_accept(struct thread *td, struct linux_accept_args *args)
867{
868
869 return (linux_accept_common(td, args->s, args->addr,
870 args->namelen, 0));
871}
872
873struct linux_accept4_args {
874 int s;
875 l_uintptr_t addr;
876 l_uintptr_t namelen;
877 int flags;
878};
879
880static int
881linux_accept4(struct thread *td, struct linux_accept4_args *args)
882{
883
884 return (linux_accept_common(td, args->s, args->addr,
885 args->namelen, args->flags));
886}
887
888struct linux_getsockname_args {
889 int s;
890 l_uintptr_t addr;
891 l_uintptr_t namelen;
892};
893
894static int
895linux_getsockname(struct thread *td, struct linux_getsockname_args *args)
896{
897 struct getsockname_args /* {
898 int fdes;
899 struct sockaddr * __restrict asa;
900 socklen_t * __restrict alen;
901 } */ bsd_args;
902 int error;
903
904 bsd_args.fdes = args->s;
905 /* XXX: */
906 bsd_args.asa = (struct sockaddr * __restrict)PTRIN(args->addr);
907 bsd_args.alen = PTRIN(args->namelen); /* XXX */
908 error = sys_getsockname(td, &bsd_args);
909 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa);
910 if (error)
911 return (error);
912 error = linux_sa_put(PTRIN(args->addr));
913 if (error)
914 return (error);
915 return (0);
916}
917
918struct linux_getpeername_args {
919 int s;
920 l_uintptr_t addr;
921 l_uintptr_t namelen;
922};
923
924static int
925linux_getpeername(struct thread *td, struct linux_getpeername_args *args)
926{
927 struct getpeername_args /* {
928 int fdes;
929 caddr_t asa;
930 int *alen;
931 } */ bsd_args;
932 int error;
933
934 bsd_args.fdes = args->s;
935 bsd_args.asa = (struct sockaddr *)PTRIN(args->addr);
936 bsd_args.alen = (socklen_t *)PTRIN(args->namelen);
937 error = sys_getpeername(td, &bsd_args);
938 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa);
939 if (error)
940 return (error);
941 error = linux_sa_put(PTRIN(args->addr));
942 if (error)
943 return (error);
944 return (0);
945}
946
947struct linux_socketpair_args {
948 int domain;
949 int type;
950 int protocol;
951 l_uintptr_t rsv;
952};
953
954static int
955linux_socketpair(struct thread *td, struct linux_socketpair_args *args)
956{
957 struct socketpair_args /* {
958 int domain;
959 int type;
960 int protocol;
961 int *rsv;
962 } */ bsd_args;
963 int error, socket_flags;
964 int sv[2];
965
966 bsd_args.domain = linux_to_bsd_domain(args->domain);
967 if (bsd_args.domain != PF_LOCAL)
968 return (EAFNOSUPPORT);
969
970 socket_flags = args->type & ~LINUX_SOCK_TYPE_MASK;
971 if (socket_flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK))
972 return (EINVAL);
973 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK;
974 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX)
975 return (EINVAL);
976
977 if (args->protocol != 0 && args->protocol != PF_UNIX)
978
979 /*
980 * Use of PF_UNIX as protocol argument is not right,
981 * but Linux does it.
982 * Do not map PF_UNIX as its Linux value is identical
983 * to FreeBSD one.
984 */
985 return (EPROTONOSUPPORT);
986 else
987 bsd_args.protocol = 0;
988 bsd_args.rsv = (int *)PTRIN(args->rsv);
989 error = kern_socketpair(td, bsd_args.domain, bsd_args.type,
990 bsd_args.protocol, sv);
991 if (error)
992 return (error);
993 error = linux_set_socket_flags(td, sv[0], socket_flags);
994 if (error)
995 goto out;
996 error = linux_set_socket_flags(td, sv[1], socket_flags);
997 if (error)
998 goto out;
999
1000 error = copyout(sv, bsd_args.rsv, 2 * sizeof(int));
1001
1002out:
1003 if (error) {
1004 (void)kern_close(td, sv[0]);
1005 (void)kern_close(td, sv[1]);
1006 }
1007 return (error);
1008}
1009
1010struct linux_send_args {
1011 int s;
1012 l_uintptr_t msg;
1013 int len;
1014 int flags;
1015};
1016
1017static int
1018linux_send(struct thread *td, struct linux_send_args *args)
1019{
1020 struct sendto_args /* {
1021 int s;
1022 caddr_t buf;
1023 int len;
1024 int flags;
1025 caddr_t to;
1026 int tolen;
1027 } */ bsd_args;
1028
1029 bsd_args.s = args->s;
1030 bsd_args.buf = (caddr_t)PTRIN(args->msg);
1031 bsd_args.len = args->len;
1032 bsd_args.flags = args->flags;
1033 bsd_args.to = NULL;
1034 bsd_args.tolen = 0;
1035 return sys_sendto(td, &bsd_args);
1036}
1037
1038struct linux_recv_args {
1039 int s;
1040 l_uintptr_t msg;
1041 int len;
1042 int flags;
1043};
1044
1045static int
1046linux_recv(struct thread *td, struct linux_recv_args *args)
1047{
1048 struct recvfrom_args /* {
1049 int s;
1050 caddr_t buf;
1051 int len;
1052 int flags;
1053 struct sockaddr *from;
1054 socklen_t fromlenaddr;
1055 } */ bsd_args;
1056
1057 bsd_args.s = args->s;
1058 bsd_args.buf = (caddr_t)PTRIN(args->msg);
1059 bsd_args.len = args->len;
1060 bsd_args.flags = linux_to_bsd_msg_flags(args->flags);
1061 bsd_args.from = NULL;
1062 bsd_args.fromlenaddr = 0;
1063 return (sys_recvfrom(td, &bsd_args));
1064}
1065
1066static int
1067linux_sendto(struct thread *td, struct linux_sendto_args *args)
1068{
1069 struct msghdr msg;
1070 struct iovec aiov;
1071 int error;
1072
1073 if (linux_check_hdrincl(td, args->s) == 0)
1074 /* IP_HDRINCL set, tweak the packet before sending */
1075 return (linux_sendto_hdrincl(td, args));
1076
1077 msg.msg_name = PTRIN(args->to);
1078 msg.msg_namelen = args->tolen;
1079 msg.msg_iov = &aiov;
1080 msg.msg_iovlen = 1;
1081 msg.msg_control = NULL;
1082 msg.msg_flags = 0;
1083 aiov.iov_base = PTRIN(args->msg);
1084 aiov.iov_len = args->len;
1085 error = linux_sendit(td, args->s, &msg, args->flags, NULL,
1086 UIO_USERSPACE);
1087 return (error);
1088}
1089
1090struct linux_recvfrom_args {
1091 int s;
1092 l_uintptr_t buf;
1093 int len;
1094 int flags;
1095 l_uintptr_t from;
1096 l_uintptr_t fromlen;
1097};
1098
1099static int
1100linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args)
1101{
1102 struct recvfrom_args /* {
1103 int s;
1104 caddr_t buf;
1105 size_t len;
1106 int flags;
1107 struct sockaddr * __restrict from;
1108 socklen_t * __restrict fromlenaddr;
1109 } */ bsd_args;
1110 size_t len;
1111 int error;
1112
1113 if ((error = copyin(PTRIN(args->fromlen), &len, sizeof(size_t))))
1114 return (error);
1115
1116 bsd_args.s = args->s;
1117 bsd_args.buf = PTRIN(args->buf);
1118 bsd_args.len = args->len;
1119 bsd_args.flags = linux_to_bsd_msg_flags(args->flags);
1120 /* XXX: */
1121 bsd_args.from = (struct sockaddr * __restrict)PTRIN(args->from);
1122 bsd_args.fromlenaddr = PTRIN(args->fromlen);/* XXX */
1123
1124 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.from, len);
1125 error = sys_recvfrom(td, &bsd_args);
1126 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.from);
1127
1128 if (error)
1129 return (error);
1130 if (args->from) {
1131 error = linux_sa_put((struct osockaddr *)
1132 PTRIN(args->from));
1133 if (error)
1134 return (error);
1135 }
1136 return (0);
1137}
1138
1139struct linux_sendmsg_args {
1140 int s;
1141 l_uintptr_t msg;
1142 int flags;
1143};
1144
1145static int
1146linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args)
1147{
1148 struct cmsghdr *cmsg;
1149 struct cmsgcred cmcred;
1150 struct mbuf *control;
1151 struct msghdr msg;
1152 struct l_cmsghdr linux_cmsg;
1153 struct l_cmsghdr *ptr_cmsg;
1154 struct l_msghdr linux_msg;
1155 struct iovec *iov;
1156 socklen_t datalen;
1157 struct sockaddr *sa;
1158 sa_family_t sa_family;
1159 void *data;
1160 int error;
1161
1162 error = copyin(PTRIN(args->msg), &linux_msg, sizeof(linux_msg));
1163 if (error)
1164 return (error);
1165
1166 /*
1167 * Some Linux applications (ping) define a non-NULL control data
1168 * pointer, but a msg_controllen of 0, which is not allowed in the
1169 * FreeBSD system call interface. NULL the msg_control pointer in
1170 * order to handle this case. This should be checked, but allows the
1171 * Linux ping to work.
1172 */
1173 if (PTRIN(linux_msg.msg_control) != NULL && linux_msg.msg_controllen == 0)
1174 linux_msg.msg_control = PTROUT(NULL);
1175
1176 error = linux_to_bsd_msghdr(&msg, &linux_msg);
1177 if (error)
1178 return (error);
1179
1180#ifdef COMPAT_LINUX32
1181 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen,
1182 &iov, EMSGSIZE);
1183#else
1184 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
1185#endif
1186 if (error)
1187 return (error);
1188
1189 control = NULL;
1190 cmsg = NULL;
1191
1192 if ((ptr_cmsg = LINUX_CMSG_FIRSTHDR(&linux_msg)) != NULL) {
1193 error = kern_getsockname(td, args->s, &sa, &datalen);
1194 if (error)
1195 goto bad;
1196 sa_family = sa->sa_family;
1197 free(sa, M_SONAME);
1198
1199 error = ENOBUFS;
1200 cmsg = malloc(CMSG_HDRSZ, M_TEMP, M_WAITOK | M_ZERO);
1201 control = m_get(M_WAITOK, MT_CONTROL);
1202 if (control == NULL)
1203 goto bad;
1204
1205 do {
1206 error = copyin(ptr_cmsg, &linux_cmsg,
1207 sizeof(struct l_cmsghdr));
1208 if (error)
1209 goto bad;
1210
1211 error = EINVAL;
1212 if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr))
1213 goto bad;
1214
1215 /*
1216 * Now we support only SCM_RIGHTS and SCM_CRED,
1217 * so return EINVAL in any other cmsg_type
1218 */
1219 cmsg->cmsg_type =
1220 linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type);
1221 cmsg->cmsg_level =
1222 linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level);
1223 if (cmsg->cmsg_type == -1
1224 || cmsg->cmsg_level != SOL_SOCKET)
1225 goto bad;
1226
1227 /*
1228 * Some applications (e.g. pulseaudio) attempt to
1229 * send ancillary data even if the underlying protocol
1230 * doesn't support it which is not allowed in the
1231 * FreeBSD system call interface.
1232 */
1233 if (sa_family != AF_UNIX)
1234 continue;
1235
1236 data = LINUX_CMSG_DATA(ptr_cmsg);
1237 datalen = linux_cmsg.cmsg_len - L_CMSG_HDRSZ;
1238
1239 switch (cmsg->cmsg_type)
1240 {
1241 case SCM_RIGHTS:
1242 break;
1243
1244 case SCM_CREDS:
1245 data = &cmcred;
1246 datalen = sizeof(cmcred);
1247
1248 /*
1249 * The lower levels will fill in the structure
1250 */
1251 bzero(data, datalen);
1252 break;
1253 }
1254
1255 cmsg->cmsg_len = CMSG_LEN(datalen);
1256
1257 error = ENOBUFS;
1258 if (!m_append(control, CMSG_HDRSZ, (c_caddr_t)cmsg))
1259 goto bad;
1260 if (!m_append(control, datalen, (c_caddr_t)data))
1261 goto bad;
1262 } while ((ptr_cmsg = LINUX_CMSG_NXTHDR(&linux_msg, ptr_cmsg)));
1263
1264 if (m_length(control, NULL) == 0) {
1265 m_freem(control);
1266 control = NULL;
1267 }
1268 }
1269
1270 msg.msg_iov = iov;
1271 msg.msg_flags = 0;
1272 error = linux_sendit(td, args->s, &msg, args->flags, control,
1273 UIO_USERSPACE);
1274
1275bad:
1276 free(iov, M_IOV);
1277 if (cmsg)
1278 free(cmsg, M_TEMP);
1279 return (error);
1280}
1281
1282struct linux_recvmsg_args {
1283 int s;
1284 l_uintptr_t msg;
1285 int flags;
1286};
1287
1288static int
1289linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args)
1290{
1291 struct cmsghdr *cm;
1292 struct cmsgcred *cmcred;
1293 struct msghdr msg;
1294 struct l_cmsghdr *linux_cmsg = NULL;
1295 struct l_ucred linux_ucred;
1296 socklen_t datalen, outlen;
1297 struct l_msghdr linux_msg;
1298 struct iovec *iov, *uiov;
1299 struct mbuf *control = NULL;
1300 struct mbuf **controlp;
1301 caddr_t outbuf;
1302 void *data;
1303 int error, i, fd, fds, *fdp;
1304
1305 error = copyin(PTRIN(args->msg), &linux_msg, sizeof(linux_msg));
1306 if (error)
1307 return (error);
1308
1309 error = linux_to_bsd_msghdr(&msg, &linux_msg);
1310 if (error)
1311 return (error);
1312
1313#ifdef COMPAT_LINUX32
1314 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen,
1315 &iov, EMSGSIZE);
1316#else
1317 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
1318#endif
1319 if (error)
1320 return (error);
1321
1322 if (msg.msg_name) {
1323 error = linux_to_bsd_sockaddr((struct sockaddr *)msg.msg_name,
1324 msg.msg_namelen);
1325 if (error)
1326 goto bad;
1327 }
1328
1329 uiov = msg.msg_iov;
1330 msg.msg_iov = iov;
1331 controlp = (msg.msg_control != NULL) ? &control : NULL;
1332 error = kern_recvit(td, args->s, &msg, UIO_USERSPACE, controlp);
1333 msg.msg_iov = uiov;
1334 if (error)
1335 goto bad;
1336
1337 error = bsd_to_linux_msghdr(&msg, &linux_msg);
1338 if (error)
1339 goto bad;
1340
1341 if (linux_msg.msg_name) {
1342 error = bsd_to_linux_sockaddr((struct sockaddr *)
1343 PTRIN(linux_msg.msg_name));
1344 if (error)
1345 goto bad;
1346 }
1347 if (linux_msg.msg_name && linux_msg.msg_namelen > 2) {
1348 error = linux_sa_put(PTRIN(linux_msg.msg_name));
1349 if (error)
1350 goto bad;
1351 }
1352
1353 outbuf = PTRIN(linux_msg.msg_control);
1354 outlen = 0;
1355
1356 if (control) {
1357 linux_cmsg = malloc(L_CMSG_HDRSZ, M_TEMP, M_WAITOK | M_ZERO);
1358
1359 msg.msg_control = mtod(control, struct cmsghdr *);
1360 msg.msg_controllen = control->m_len;
1361
1362 cm = CMSG_FIRSTHDR(&msg);
1363
1364 while (cm != NULL) {
1365 linux_cmsg->cmsg_type =
1366 bsd_to_linux_cmsg_type(cm->cmsg_type);
1367 linux_cmsg->cmsg_level =
1368 bsd_to_linux_sockopt_level(cm->cmsg_level);
1369 if (linux_cmsg->cmsg_type == -1
1370 || cm->cmsg_level != SOL_SOCKET)
1371 {
1372 error = EINVAL;
1373 goto bad;
1374 }
1375
1376 data = CMSG_DATA(cm);
1377 datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data;
1378
1379 switch (cm->cmsg_type)
1380 {
1381 case SCM_RIGHTS:
1382 if (args->flags & LINUX_MSG_CMSG_CLOEXEC) {
1383 fds = datalen / sizeof(int);
1384 fdp = data;
1385 for (i = 0; i < fds; i++) {
1386 fd = *fdp++;
1387 (void)kern_fcntl(td, fd,
1388 F_SETFD, FD_CLOEXEC);
1389 }
1390 }
1391 break;
1392
1393 case SCM_CREDS:
1394 /*
1395 * Currently LOCAL_CREDS is never in
1396 * effect for Linux so no need to worry
1397 * about sockcred
1398 */
1399 if (datalen != sizeof(*cmcred)) {
1400 error = EMSGSIZE;
1401 goto bad;
1402 }
1403 cmcred = (struct cmsgcred *)data;
1404 bzero(&linux_ucred, sizeof(linux_ucred));
1405 linux_ucred.pid = cmcred->cmcred_pid;
1406 linux_ucred.uid = cmcred->cmcred_uid;
1407 linux_ucred.gid = cmcred->cmcred_gid;
1408 data = &linux_ucred;
1409 datalen = sizeof(linux_ucred);
1410 break;
1411 }
1412
1413 if (outlen + LINUX_CMSG_LEN(datalen) >
1414 linux_msg.msg_controllen) {
1415 if (outlen == 0) {
1416 error = EMSGSIZE;
1417 goto bad;
1418 } else {
1419 linux_msg.msg_flags |=
1420 LINUX_MSG_CTRUNC;
1421 goto out;
1422 }
1423 }
1424
1425 linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen);
1426
1427 error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ);
1428 if (error)
1429 goto bad;
1430 outbuf += L_CMSG_HDRSZ;
1431
1432 error = copyout(data, outbuf, datalen);
1433 if (error)
1434 goto bad;
1435
1436 outbuf += LINUX_CMSG_ALIGN(datalen);
1437 outlen += LINUX_CMSG_LEN(datalen);
1438
1439 cm = CMSG_NXTHDR(&msg, cm);
1440 }
1441 }
1442
1443out:
1444 linux_msg.msg_controllen = outlen;
1445 error = copyout(&linux_msg, PTRIN(args->msg), sizeof(linux_msg));
1446
1447bad:
1448 free(iov, M_IOV);
1449 m_freem(control);
1450 free(linux_cmsg, M_TEMP);
1451
1452 return (error);
1453}
1454
1455struct linux_shutdown_args {
1456 int s;
1457 int how;
1458};
1459
1460static int
1461linux_shutdown(struct thread *td, struct linux_shutdown_args *args)
1462{
1463 struct shutdown_args /* {
1464 int s;
1465 int how;
1466 } */ bsd_args;
1467
1468 bsd_args.s = args->s;
1469 bsd_args.how = args->how;
1470 return (sys_shutdown(td, &bsd_args));
1471}
1472
1473struct linux_setsockopt_args {
1474 int s;
1475 int level;
1476 int optname;
1477 l_uintptr_t optval;
1478 int optlen;
1479};
1480
1481static int
1482linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args)
1483{
1484 struct setsockopt_args /* {
1485 int s;
1486 int level;
1487 int name;
1488 caddr_t val;
1489 int valsize;
1490 } */ bsd_args;
1491 l_timeval linux_tv;
1492 struct timeval tv;
1493 int error, name;
1494
1495 bsd_args.s = args->s;
1496 bsd_args.level = linux_to_bsd_sockopt_level(args->level);
1497 switch (bsd_args.level) {
1498 case SOL_SOCKET:
1499 name = linux_to_bsd_so_sockopt(args->optname);
1500 switch (name) {
1501 case SO_RCVTIMEO:
1502 /* FALLTHROUGH */
1503 case SO_SNDTIMEO:
1504 error = copyin(PTRIN(args->optval), &linux_tv,
1505 sizeof(linux_tv));
1506 if (error)
1507 return (error);
1508 tv.tv_sec = linux_tv.tv_sec;
1509 tv.tv_usec = linux_tv.tv_usec;
1510 return (kern_setsockopt(td, args->s, bsd_args.level,
1511 name, &tv, UIO_SYSSPACE, sizeof(tv)));
1512 /* NOTREACHED */
1513 break;
1514 default:
1515 break;
1516 }
1517 break;
1518 case IPPROTO_IP:
1519 name = linux_to_bsd_ip_sockopt(args->optname);
1520 break;
1521 case IPPROTO_TCP:
1522 name = linux_to_bsd_tcp_sockopt(args->optname);
1523 break;
1524 default:
1525 name = -1;
1526 break;
1527 }
1528 if (name == -1)
1529 return (ENOPROTOOPT);
1530
1531 bsd_args.name = name;
1532 bsd_args.val = PTRIN(args->optval);
1533 bsd_args.valsize = args->optlen;
1534
1535 if (name == IPV6_NEXTHOP) {
1536 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val,
1537 bsd_args.valsize);
1538 error = sys_setsockopt(td, &bsd_args);
1539 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val);
1540 } else
1541 error = sys_setsockopt(td, &bsd_args);
1542
1543 return (error);
1544}
1545
1546struct linux_getsockopt_args {
1547 int s;
1548 int level;
1549 int optname;
1550 l_uintptr_t optval;
1551 l_uintptr_t optlen;
1552};
1553
1554static int
1555linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args)
1556{
1557 struct getsockopt_args /* {
1558 int s;
1559 int level;
1560 int name;
1561 caddr_t val;
1562 int *avalsize;
1563 } */ bsd_args;
1564 l_timeval linux_tv;
1565 struct timeval tv;
1566 socklen_t tv_len, xulen;
1567 struct xucred xu;
1568 struct l_ucred lxu;
1569 int error, name;
1570
1571 bsd_args.s = args->s;
1572 bsd_args.level = linux_to_bsd_sockopt_level(args->level);
1573 switch (bsd_args.level) {
1574 case SOL_SOCKET:
1575 name = linux_to_bsd_so_sockopt(args->optname);
1576 switch (name) {
1577 case SO_RCVTIMEO:
1578 /* FALLTHROUGH */
1579 case SO_SNDTIMEO:
1580 tv_len = sizeof(tv);
1581 error = kern_getsockopt(td, args->s, bsd_args.level,
1582 name, &tv, UIO_SYSSPACE, &tv_len);
1583 if (error)
1584 return (error);
1585 linux_tv.tv_sec = tv.tv_sec;
1586 linux_tv.tv_usec = tv.tv_usec;
1587 return (copyout(&linux_tv, PTRIN(args->optval),
1588 sizeof(linux_tv)));
1589 /* NOTREACHED */
1590 break;
1591 case LOCAL_PEERCRED:
1592 if (args->optlen != sizeof(lxu))
1593 return (EINVAL);
1594 xulen = sizeof(xu);
1595 error = kern_getsockopt(td, args->s, bsd_args.level,
1596 name, &xu, UIO_SYSSPACE, &xulen);
1597 if (error)
1598 return (error);
1599 /*
1600 * XXX Use 0 for pid as the FreeBSD does not cache peer pid.
1601 */
1602 lxu.pid = 0;
1603 lxu.uid = xu.cr_uid;
1604 lxu.gid = xu.cr_gid;
1605 return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu)));
1606 /* NOTREACHED */
1607 break;
1608 default:
1609 break;
1610 }
1611 break;
1612 case IPPROTO_IP:
1613 name = linux_to_bsd_ip_sockopt(args->optname);
1614 break;
1615 case IPPROTO_TCP:
1616 name = linux_to_bsd_tcp_sockopt(args->optname);
1617 break;
1618 default:
1619 name = -1;
1620 break;
1621 }
1622 if (name == -1)
1623 return (EINVAL);
1624
1625 bsd_args.name = name;
1626 bsd_args.val = PTRIN(args->optval);
1627 bsd_args.avalsize = PTRIN(args->optlen);
1628
1629 if (name == IPV6_NEXTHOP) {
1630 error = sys_getsockopt(td, &bsd_args);
1631 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val);
1632 } else
1633 error = sys_getsockopt(td, &bsd_args);
1634
1635 return (error);
1636}
1637
1638/* Argument list sizes for linux_socketcall */
1639
1640#define LINUX_AL(x) ((x) * sizeof(l_ulong))
1641
1642static const unsigned char lxs_args[] = {
1643 LINUX_AL(0) /* unused*/, LINUX_AL(3) /* socket */,
1644 LINUX_AL(3) /* bind */, LINUX_AL(3) /* connect */,
1645 LINUX_AL(2) /* listen */, LINUX_AL(3) /* accept */,
1646 LINUX_AL(3) /* getsockname */, LINUX_AL(3) /* getpeername */,
1647 LINUX_AL(4) /* socketpair */, LINUX_AL(4) /* send */,
1648 LINUX_AL(4) /* recv */, LINUX_AL(6) /* sendto */,
1649 LINUX_AL(6) /* recvfrom */, LINUX_AL(2) /* shutdown */,
1650 LINUX_AL(5) /* setsockopt */, LINUX_AL(5) /* getsockopt */,
1651 LINUX_AL(3) /* sendmsg */, LINUX_AL(3) /* recvmsg */,
1652 LINUX_AL(4) /* accept4 */
1653};
1654
1655#define LINUX_AL_SIZE sizeof(lxs_args) / sizeof(lxs_args[0]) - 1
1656
1657int
1658linux_socketcall(struct thread *td, struct linux_socketcall_args *args)
1659{
1660 l_ulong a[6];
1661 void *arg;
1662 int error;
1663
1664 if (args->what < LINUX_SOCKET || args->what > LINUX_AL_SIZE)
1665 return (EINVAL);
1666 error = copyin(PTRIN(args->args), a, lxs_args[args->what]);
1667 if (error)
1668 return (error);
1669
1670 arg = a;
1671 switch (args->what) {
1672 case LINUX_SOCKET:
1673 return (linux_socket(td, arg));
1674 case LINUX_BIND:
1675 return (linux_bind(td, arg));
1676 case LINUX_CONNECT:
1677 return (linux_connect(td, arg));
1678 case LINUX_LISTEN:
1679 return (linux_listen(td, arg));
1680 case LINUX_ACCEPT:
1681 return (linux_accept(td, arg));
1682 case LINUX_GETSOCKNAME:
1683 return (linux_getsockname(td, arg));
1684 case LINUX_GETPEERNAME:
1685 return (linux_getpeername(td, arg));
1686 case LINUX_SOCKETPAIR:
1687 return (linux_socketpair(td, arg));
1688 case LINUX_SEND:
1689 return (linux_send(td, arg));
1690 case LINUX_RECV:
1691 return (linux_recv(td, arg));
1692 case LINUX_SENDTO:
1693 return (linux_sendto(td, arg));
1694 case LINUX_RECVFROM:
1695 return (linux_recvfrom(td, arg));
1696 case LINUX_SHUTDOWN:
1697 return (linux_shutdown(td, arg));
1698 case LINUX_SETSOCKOPT:
1699 return (linux_setsockopt(td, arg));
1700 case LINUX_GETSOCKOPT:
1701 return (linux_getsockopt(td, arg));
1702 case LINUX_SENDMSG:
1703 return (linux_sendmsg(td, arg));
1704 case LINUX_RECVMSG:
1705 return (linux_recvmsg(td, arg));
1706 case LINUX_ACCEPT4:
1707 return (linux_accept4(td, arg));
1708 }
1709
1710 uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what);
1711 return (ENOSYS);
1712}
2 * Copyright (c) 1995 S��ren 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: head/sys/compat/linux/linux_socket.c 276512 2015-01-01 20:53:38Z 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_socket.h>
74#include <compat/linux/linux_util.h>
75
76static int linux_to_bsd_domain(int);
77
78/*
79 * Reads a linux sockaddr and does any necessary translation.
80 * Linux sockaddrs don't have a length field, only a family.
81 * Copy the osockaddr structure pointed to by osa to kernel, adjust
82 * family and convert to sockaddr.
83 */
84static int
85linux_getsockaddr(struct sockaddr **sap, const struct osockaddr *osa, int salen)
86{
87 struct sockaddr *sa;
88 struct osockaddr *kosa;
89#ifdef INET6
90 struct sockaddr_in6 *sin6;
91 int oldv6size;
92#endif
93 char *name;
94 int bdom, error, hdrlen, namelen;
95
96 if (salen < 2 || salen > UCHAR_MAX || !osa)
97 return (EINVAL);
98
99#ifdef INET6
100 oldv6size = 0;
101 /*
102 * Check for old (pre-RFC2553) sockaddr_in6. We may accept it
103 * if it's a v4-mapped address, so reserve the proper space
104 * for it.
105 */
106 if (salen == sizeof(struct sockaddr_in6) - sizeof(uint32_t)) {
107 salen += sizeof(uint32_t);
108 oldv6size = 1;
109 }
110#endif
111
112 kosa = malloc(salen, M_SONAME, M_WAITOK);
113
114 if ((error = copyin(osa, kosa, salen)))
115 goto out;
116
117 bdom = linux_to_bsd_domain(kosa->sa_family);
118 if (bdom == -1) {
119 error = EAFNOSUPPORT;
120 goto out;
121 }
122
123#ifdef INET6
124 /*
125 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6,
126 * which lacks the scope id compared with RFC2553 one. If we detect
127 * the situation, reject the address and write a message to system log.
128 *
129 * Still accept addresses for which the scope id is not used.
130 */
131 if (oldv6size) {
132 if (bdom == AF_INET6) {
133 sin6 = (struct sockaddr_in6 *)kosa;
134 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) ||
135 (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
136 !IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
137 !IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) &&
138 !IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
139 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) {
140 sin6->sin6_scope_id = 0;
141 } else {
142 log(LOG_DEBUG,
143 "obsolete pre-RFC2553 sockaddr_in6 rejected\n");
144 error = EINVAL;
145 goto out;
146 }
147 } else
148 salen -= sizeof(uint32_t);
149 }
150#endif
151 if (bdom == AF_INET) {
152 if (salen < sizeof(struct sockaddr_in)) {
153 error = EINVAL;
154 goto out;
155 }
156 salen = sizeof(struct sockaddr_in);
157 }
158
159 if (bdom == AF_LOCAL && salen > sizeof(struct sockaddr_un)) {
160 hdrlen = offsetof(struct sockaddr_un, sun_path);
161 name = ((struct sockaddr_un *)kosa)->sun_path;
162 if (*name == '\0') {
163 /*
164 * Linux abstract namespace starts with a NULL byte.
165 * XXX We do not support abstract namespace yet.
166 */
167 namelen = strnlen(name + 1, salen - hdrlen - 1) + 1;
168 } else
169 namelen = strnlen(name, salen - hdrlen);
170 salen = hdrlen + namelen;
171 if (salen > sizeof(struct sockaddr_un)) {
172 error = ENAMETOOLONG;
173 goto out;
174 }
175 }
176
177 sa = (struct sockaddr *)kosa;
178 sa->sa_family = bdom;
179 sa->sa_len = salen;
180
181 *sap = sa;
182 return (0);
183
184out:
185 free(kosa, M_SONAME);
186 return (error);
187}
188
189static int
190linux_to_bsd_domain(int domain)
191{
192
193 switch (domain) {
194 case LINUX_AF_UNSPEC:
195 return (AF_UNSPEC);
196 case LINUX_AF_UNIX:
197 return (AF_LOCAL);
198 case LINUX_AF_INET:
199 return (AF_INET);
200 case LINUX_AF_INET6:
201 return (AF_INET6);
202 case LINUX_AF_AX25:
203 return (AF_CCITT);
204 case LINUX_AF_IPX:
205 return (AF_IPX);
206 case LINUX_AF_APPLETALK:
207 return (AF_APPLETALK);
208 }
209 return (-1);
210}
211
212static int
213bsd_to_linux_domain(int domain)
214{
215
216 switch (domain) {
217 case AF_UNSPEC:
218 return (LINUX_AF_UNSPEC);
219 case AF_LOCAL:
220 return (LINUX_AF_UNIX);
221 case AF_INET:
222 return (LINUX_AF_INET);
223 case AF_INET6:
224 return (LINUX_AF_INET6);
225 case AF_CCITT:
226 return (LINUX_AF_AX25);
227 case AF_IPX:
228 return (LINUX_AF_IPX);
229 case AF_APPLETALK:
230 return (LINUX_AF_APPLETALK);
231 }
232 return (-1);
233}
234
235static int
236linux_to_bsd_sockopt_level(int level)
237{
238
239 switch (level) {
240 case LINUX_SOL_SOCKET:
241 return (SOL_SOCKET);
242 }
243 return (level);
244}
245
246static int
247bsd_to_linux_sockopt_level(int level)
248{
249
250 switch (level) {
251 case SOL_SOCKET:
252 return (LINUX_SOL_SOCKET);
253 }
254 return (level);
255}
256
257static int
258linux_to_bsd_ip_sockopt(int opt)
259{
260
261 switch (opt) {
262 case LINUX_IP_TOS:
263 return (IP_TOS);
264 case LINUX_IP_TTL:
265 return (IP_TTL);
266 case LINUX_IP_OPTIONS:
267 return (IP_OPTIONS);
268 case LINUX_IP_MULTICAST_IF:
269 return (IP_MULTICAST_IF);
270 case LINUX_IP_MULTICAST_TTL:
271 return (IP_MULTICAST_TTL);
272 case LINUX_IP_MULTICAST_LOOP:
273 return (IP_MULTICAST_LOOP);
274 case LINUX_IP_ADD_MEMBERSHIP:
275 return (IP_ADD_MEMBERSHIP);
276 case LINUX_IP_DROP_MEMBERSHIP:
277 return (IP_DROP_MEMBERSHIP);
278 case LINUX_IP_HDRINCL:
279 return (IP_HDRINCL);
280 }
281 return (-1);
282}
283
284static int
285linux_to_bsd_so_sockopt(int opt)
286{
287
288 switch (opt) {
289 case LINUX_SO_DEBUG:
290 return (SO_DEBUG);
291 case LINUX_SO_REUSEADDR:
292 return (SO_REUSEADDR);
293 case LINUX_SO_TYPE:
294 return (SO_TYPE);
295 case LINUX_SO_ERROR:
296 return (SO_ERROR);
297 case LINUX_SO_DONTROUTE:
298 return (SO_DONTROUTE);
299 case LINUX_SO_BROADCAST:
300 return (SO_BROADCAST);
301 case LINUX_SO_SNDBUF:
302 return (SO_SNDBUF);
303 case LINUX_SO_RCVBUF:
304 return (SO_RCVBUF);
305 case LINUX_SO_KEEPALIVE:
306 return (SO_KEEPALIVE);
307 case LINUX_SO_OOBINLINE:
308 return (SO_OOBINLINE);
309 case LINUX_SO_LINGER:
310 return (SO_LINGER);
311 case LINUX_SO_PEERCRED:
312 return (LOCAL_PEERCRED);
313 case LINUX_SO_RCVLOWAT:
314 return (SO_RCVLOWAT);
315 case LINUX_SO_SNDLOWAT:
316 return (SO_SNDLOWAT);
317 case LINUX_SO_RCVTIMEO:
318 return (SO_RCVTIMEO);
319 case LINUX_SO_SNDTIMEO:
320 return (SO_SNDTIMEO);
321 case LINUX_SO_TIMESTAMP:
322 return (SO_TIMESTAMP);
323 case LINUX_SO_ACCEPTCONN:
324 return (SO_ACCEPTCONN);
325 }
326 return (-1);
327}
328
329static int
330linux_to_bsd_tcp_sockopt(int opt)
331{
332
333 switch (opt) {
334 case LINUX_TCP_NODELAY:
335 return (TCP_NODELAY);
336 case LINUX_TCP_MAXSEG:
337 return (TCP_MAXSEG);
338 case LINUX_TCP_KEEPIDLE:
339 return (TCP_KEEPIDLE);
340 case LINUX_TCP_KEEPINTVL:
341 return (TCP_KEEPINTVL);
342 case LINUX_TCP_KEEPCNT:
343 return (TCP_KEEPCNT);
344 case LINUX_TCP_MD5SIG:
345 return (TCP_MD5SIG);
346 }
347 return (-1);
348}
349
350static int
351linux_to_bsd_msg_flags(int flags)
352{
353 int ret_flags = 0;
354
355 if (flags & LINUX_MSG_OOB)
356 ret_flags |= MSG_OOB;
357 if (flags & LINUX_MSG_PEEK)
358 ret_flags |= MSG_PEEK;
359 if (flags & LINUX_MSG_DONTROUTE)
360 ret_flags |= MSG_DONTROUTE;
361 if (flags & LINUX_MSG_CTRUNC)
362 ret_flags |= MSG_CTRUNC;
363 if (flags & LINUX_MSG_TRUNC)
364 ret_flags |= MSG_TRUNC;
365 if (flags & LINUX_MSG_DONTWAIT)
366 ret_flags |= MSG_DONTWAIT;
367 if (flags & LINUX_MSG_EOR)
368 ret_flags |= MSG_EOR;
369 if (flags & LINUX_MSG_WAITALL)
370 ret_flags |= MSG_WAITALL;
371 if (flags & LINUX_MSG_NOSIGNAL)
372 ret_flags |= MSG_NOSIGNAL;
373#if 0 /* not handled */
374 if (flags & LINUX_MSG_PROXY)
375 ;
376 if (flags & LINUX_MSG_FIN)
377 ;
378 if (flags & LINUX_MSG_SYN)
379 ;
380 if (flags & LINUX_MSG_CONFIRM)
381 ;
382 if (flags & LINUX_MSG_RST)
383 ;
384 if (flags & LINUX_MSG_ERRQUEUE)
385 ;
386#endif
387 return ret_flags;
388}
389
390/*
391* If bsd_to_linux_sockaddr() or linux_to_bsd_sockaddr() faults, then the
392* native syscall will fault. Thus, we don't really need to check the
393* return values for these functions.
394*/
395
396static int
397bsd_to_linux_sockaddr(struct sockaddr *arg)
398{
399 struct sockaddr sa;
400 size_t sa_len = sizeof(struct sockaddr);
401 int error;
402
403 if ((error = copyin(arg, &sa, sa_len)))
404 return (error);
405
406 *(u_short *)&sa = sa.sa_family;
407
408 error = copyout(&sa, arg, sa_len);
409
410 return (error);
411}
412
413static int
414linux_to_bsd_sockaddr(struct sockaddr *arg, int len)
415{
416 struct sockaddr sa;
417 size_t sa_len = sizeof(struct sockaddr);
418 int error;
419
420 if ((error = copyin(arg, &sa, sa_len)))
421 return (error);
422
423 sa.sa_family = *(sa_family_t *)&sa;
424 sa.sa_len = len;
425
426 error = copyout(&sa, arg, sa_len);
427
428 return (error);
429}
430
431
432static int
433linux_sa_put(struct osockaddr *osa)
434{
435 struct osockaddr sa;
436 int error, bdom;
437
438 /*
439 * Only read/write the osockaddr family part, the rest is
440 * not changed.
441 */
442 error = copyin(osa, &sa, sizeof(sa.sa_family));
443 if (error)
444 return (error);
445
446 bdom = bsd_to_linux_domain(sa.sa_family);
447 if (bdom == -1)
448 return (EINVAL);
449
450 sa.sa_family = bdom;
451 error = copyout(&sa, osa, sizeof(sa.sa_family));
452 if (error)
453 return (error);
454
455 return (0);
456}
457
458static int
459linux_to_bsd_cmsg_type(int cmsg_type)
460{
461
462 switch (cmsg_type) {
463 case LINUX_SCM_RIGHTS:
464 return (SCM_RIGHTS);
465 case LINUX_SCM_CREDENTIALS:
466 return (SCM_CREDS);
467 }
468 return (-1);
469}
470
471static int
472bsd_to_linux_cmsg_type(int cmsg_type)
473{
474
475 switch (cmsg_type) {
476 case SCM_RIGHTS:
477 return (LINUX_SCM_RIGHTS);
478 case SCM_CREDS:
479 return (LINUX_SCM_CREDENTIALS);
480 }
481 return (-1);
482}
483
484static int
485linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr)
486{
487 if (lhdr->msg_controllen > INT_MAX)
488 return (ENOBUFS);
489
490 bhdr->msg_name = PTRIN(lhdr->msg_name);
491 bhdr->msg_namelen = lhdr->msg_namelen;
492 bhdr->msg_iov = PTRIN(lhdr->msg_iov);
493 bhdr->msg_iovlen = lhdr->msg_iovlen;
494 bhdr->msg_control = PTRIN(lhdr->msg_control);
495
496 /*
497 * msg_controllen is skipped since BSD and LINUX control messages
498 * are potentially different sizes (e.g. the cred structure used
499 * by SCM_CREDS is different between the two operating system).
500 *
501 * The caller can set it (if necessary) after converting all the
502 * control messages.
503 */
504
505 bhdr->msg_flags = linux_to_bsd_msg_flags(lhdr->msg_flags);
506 return (0);
507}
508
509static int
510bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr)
511{
512 lhdr->msg_name = PTROUT(bhdr->msg_name);
513 lhdr->msg_namelen = bhdr->msg_namelen;
514 lhdr->msg_iov = PTROUT(bhdr->msg_iov);
515 lhdr->msg_iovlen = bhdr->msg_iovlen;
516 lhdr->msg_control = PTROUT(bhdr->msg_control);
517
518 /*
519 * msg_controllen is skipped since BSD and LINUX control messages
520 * are potentially different sizes (e.g. the cred structure used
521 * by SCM_CREDS is different between the two operating system).
522 *
523 * The caller can set it (if necessary) after converting all the
524 * control messages.
525 */
526
527 /* msg_flags skipped */
528 return (0);
529}
530
531static int
532linux_set_socket_flags(struct thread *td, int s, int flags)
533{
534 int error;
535
536 if (flags & LINUX_SOCK_NONBLOCK) {
537 error = kern_fcntl(td, s, F_SETFL, O_NONBLOCK);
538 if (error)
539 return (error);
540 }
541 if (flags & LINUX_SOCK_CLOEXEC) {
542 error = kern_fcntl(td, s, F_SETFD, FD_CLOEXEC);
543 if (error)
544 return (error);
545 }
546 return (0);
547}
548
549static int
550linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags,
551 struct mbuf *control, enum uio_seg segflg)
552{
553 struct sockaddr *to;
554 int error;
555
556 if (mp->msg_name != NULL) {
557 error = linux_getsockaddr(&to, mp->msg_name, mp->msg_namelen);
558 if (error)
559 return (error);
560 mp->msg_name = to;
561 } else
562 to = NULL;
563
564 error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control,
565 segflg);
566
567 if (to)
568 free(to, M_SONAME);
569 return (error);
570}
571
572/* Return 0 if IP_HDRINCL is set for the given socket. */
573static int
574linux_check_hdrincl(struct thread *td, int s)
575{
576 int error, optval;
577 socklen_t size_val;
578
579 size_val = sizeof(optval);
580 error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL,
581 &optval, UIO_SYSSPACE, &size_val);
582 if (error)
583 return (error);
584
585 return (optval == 0);
586}
587
588struct linux_sendto_args {
589 int s;
590 l_uintptr_t msg;
591 int len;
592 int flags;
593 l_uintptr_t to;
594 int tolen;
595};
596
597/*
598 * Updated sendto() when IP_HDRINCL is set:
599 * tweak endian-dependent fields in the IP packet.
600 */
601static int
602linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args)
603{
604/*
605 * linux_ip_copysize defines how many bytes we should copy
606 * from the beginning of the IP packet before we customize it for BSD.
607 * It should include all the fields we modify (ip_len and ip_off).
608 */
609#define linux_ip_copysize 8
610
611 struct ip *packet;
612 struct msghdr msg;
613 struct iovec aiov[1];
614 int error;
615
616 /* Check that the packet isn't too big or too small. */
617 if (linux_args->len < linux_ip_copysize ||
618 linux_args->len > IP_MAXPACKET)
619 return (EINVAL);
620
621 packet = (struct ip *)malloc(linux_args->len, M_TEMP, M_WAITOK);
622
623 /* Make kernel copy of the packet to be sent */
624 if ((error = copyin(PTRIN(linux_args->msg), packet,
625 linux_args->len)))
626 goto goout;
627
628 /* Convert fields from Linux to BSD raw IP socket format */
629 packet->ip_len = linux_args->len;
630 packet->ip_off = ntohs(packet->ip_off);
631
632 /* Prepare the msghdr and iovec structures describing the new packet */
633 msg.msg_name = PTRIN(linux_args->to);
634 msg.msg_namelen = linux_args->tolen;
635 msg.msg_iov = aiov;
636 msg.msg_iovlen = 1;
637 msg.msg_control = NULL;
638 msg.msg_flags = 0;
639 aiov[0].iov_base = (char *)packet;
640 aiov[0].iov_len = linux_args->len;
641 error = linux_sendit(td, linux_args->s, &msg, linux_args->flags,
642 NULL, UIO_SYSSPACE);
643goout:
644 free(packet, M_TEMP);
645 return (error);
646}
647
648struct linux_socket_args {
649 int domain;
650 int type;
651 int protocol;
652};
653
654static int
655linux_socket(struct thread *td, struct linux_socket_args *args)
656{
657 struct socket_args /* {
658 int domain;
659 int type;
660 int protocol;
661 } */ bsd_args;
662 int retval_socket, socket_flags;
663
664 bsd_args.protocol = args->protocol;
665 socket_flags = args->type & ~LINUX_SOCK_TYPE_MASK;
666 if (socket_flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK))
667 return (EINVAL);
668 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK;
669 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX)
670 return (EINVAL);
671 bsd_args.domain = linux_to_bsd_domain(args->domain);
672 if (bsd_args.domain == -1)
673 return (EAFNOSUPPORT);
674
675 retval_socket = sys_socket(td, &bsd_args);
676 if (retval_socket)
677 return (retval_socket);
678
679 retval_socket = linux_set_socket_flags(td, td->td_retval[0],
680 socket_flags);
681 if (retval_socket) {
682 (void)kern_close(td, td->td_retval[0]);
683 goto out;
684 }
685
686 if (bsd_args.type == SOCK_RAW
687 && (bsd_args.protocol == IPPROTO_RAW || bsd_args.protocol == 0)
688 && bsd_args.domain == PF_INET) {
689 /* It's a raw IP socket: set the IP_HDRINCL option. */
690 int hdrincl;
691
692 hdrincl = 1;
693 /* We ignore any error returned by kern_setsockopt() */
694 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL,
695 &hdrincl, UIO_SYSSPACE, sizeof(hdrincl));
696 }
697#ifdef INET6
698 /*
699 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default
700 * and some apps depend on this. So, set V6ONLY to 0 for Linux apps.
701 * For simplicity we do this unconditionally of the net.inet6.ip6.v6only
702 * sysctl value.
703 */
704 if (bsd_args.domain == PF_INET6) {
705 int v6only;
706
707 v6only = 0;
708 /* We ignore any error returned by setsockopt() */
709 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY,
710 &v6only, UIO_SYSSPACE, sizeof(v6only));
711 }
712#endif
713
714out:
715 return (retval_socket);
716}
717
718struct linux_bind_args {
719 int s;
720 l_uintptr_t name;
721 int namelen;
722};
723
724static int
725linux_bind(struct thread *td, struct linux_bind_args *args)
726{
727 struct sockaddr *sa;
728 int error;
729
730 error = linux_getsockaddr(&sa, PTRIN(args->name),
731 args->namelen);
732 if (error)
733 return (error);
734
735 error = kern_bindat(td, AT_FDCWD, args->s, sa);
736 free(sa, M_SONAME);
737 if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in))
738 return (EINVAL);
739 return (error);
740}
741
742struct linux_connect_args {
743 int s;
744 l_uintptr_t name;
745 int namelen;
746};
747int linux_connect(struct thread *, struct linux_connect_args *);
748
749int
750linux_connect(struct thread *td, struct linux_connect_args *args)
751{
752 cap_rights_t rights;
753 struct socket *so;
754 struct sockaddr *sa;
755 u_int fflag;
756 int error;
757
758 error = linux_getsockaddr(&sa, (struct osockaddr *)PTRIN(args->name),
759 args->namelen);
760 if (error)
761 return (error);
762
763 error = kern_connectat(td, AT_FDCWD, args->s, sa);
764 free(sa, M_SONAME);
765 if (error != EISCONN)
766 return (error);
767
768 /*
769 * Linux doesn't return EISCONN the first time it occurs,
770 * when on a non-blocking socket. Instead it returns the
771 * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD.
772 *
773 * XXXRW: Instead of using fgetsock(), check that it is a
774 * socket and use the file descriptor reference instead of
775 * creating a new one.
776 */
777 error = fgetsock(td, args->s, cap_rights_init(&rights, CAP_CONNECT),
778 &so, &fflag);
779 if (error == 0) {
780 error = EISCONN;
781 if (fflag & FNONBLOCK) {
782 SOCK_LOCK(so);
783 if (so->so_emuldata == 0)
784 error = so->so_error;
785 so->so_emuldata = (void *)1;
786 SOCK_UNLOCK(so);
787 }
788 fputsock(so);
789 }
790 return (error);
791}
792
793struct linux_listen_args {
794 int s;
795 int backlog;
796};
797
798static int
799linux_listen(struct thread *td, struct linux_listen_args *args)
800{
801 struct listen_args /* {
802 int s;
803 int backlog;
804 } */ bsd_args;
805
806 bsd_args.s = args->s;
807 bsd_args.backlog = args->backlog;
808 return (sys_listen(td, &bsd_args));
809}
810
811static int
812linux_accept_common(struct thread *td, int s, l_uintptr_t addr,
813 l_uintptr_t namelen, int flags)
814{
815 struct accept_args /* {
816 int s;
817 struct sockaddr * __restrict name;
818 socklen_t * __restrict anamelen;
819 } */ bsd_args;
820 int error;
821
822 if (flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK))
823 return (EINVAL);
824
825 bsd_args.s = s;
826 /* XXX: */
827 bsd_args.name = (struct sockaddr * __restrict)PTRIN(addr);
828 bsd_args.anamelen = PTRIN(namelen);/* XXX */
829 error = sys_accept(td, &bsd_args);
830 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.name);
831 if (error) {
832 if (error == EFAULT && namelen != sizeof(struct sockaddr_in))
833 return (EINVAL);
834 return (error);
835 }
836
837 /*
838 * linux appears not to copy flags from the parent socket to the
839 * accepted one, so we must clear the flags in the new descriptor
840 * and apply the requested flags.
841 */
842 error = kern_fcntl(td, td->td_retval[0], F_SETFL, 0);
843 if (error)
844 goto out;
845 error = linux_set_socket_flags(td, td->td_retval[0], flags);
846 if (error)
847 goto out;
848 if (addr)
849 error = linux_sa_put(PTRIN(addr));
850
851out:
852 if (error) {
853 (void)kern_close(td, td->td_retval[0]);
854 td->td_retval[0] = 0;
855 }
856 return (error);
857}
858
859struct linux_accept_args {
860 int s;
861 l_uintptr_t addr;
862 l_uintptr_t namelen;
863};
864
865static int
866linux_accept(struct thread *td, struct linux_accept_args *args)
867{
868
869 return (linux_accept_common(td, args->s, args->addr,
870 args->namelen, 0));
871}
872
873struct linux_accept4_args {
874 int s;
875 l_uintptr_t addr;
876 l_uintptr_t namelen;
877 int flags;
878};
879
880static int
881linux_accept4(struct thread *td, struct linux_accept4_args *args)
882{
883
884 return (linux_accept_common(td, args->s, args->addr,
885 args->namelen, args->flags));
886}
887
888struct linux_getsockname_args {
889 int s;
890 l_uintptr_t addr;
891 l_uintptr_t namelen;
892};
893
894static int
895linux_getsockname(struct thread *td, struct linux_getsockname_args *args)
896{
897 struct getsockname_args /* {
898 int fdes;
899 struct sockaddr * __restrict asa;
900 socklen_t * __restrict alen;
901 } */ bsd_args;
902 int error;
903
904 bsd_args.fdes = args->s;
905 /* XXX: */
906 bsd_args.asa = (struct sockaddr * __restrict)PTRIN(args->addr);
907 bsd_args.alen = PTRIN(args->namelen); /* XXX */
908 error = sys_getsockname(td, &bsd_args);
909 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa);
910 if (error)
911 return (error);
912 error = linux_sa_put(PTRIN(args->addr));
913 if (error)
914 return (error);
915 return (0);
916}
917
918struct linux_getpeername_args {
919 int s;
920 l_uintptr_t addr;
921 l_uintptr_t namelen;
922};
923
924static int
925linux_getpeername(struct thread *td, struct linux_getpeername_args *args)
926{
927 struct getpeername_args /* {
928 int fdes;
929 caddr_t asa;
930 int *alen;
931 } */ bsd_args;
932 int error;
933
934 bsd_args.fdes = args->s;
935 bsd_args.asa = (struct sockaddr *)PTRIN(args->addr);
936 bsd_args.alen = (socklen_t *)PTRIN(args->namelen);
937 error = sys_getpeername(td, &bsd_args);
938 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa);
939 if (error)
940 return (error);
941 error = linux_sa_put(PTRIN(args->addr));
942 if (error)
943 return (error);
944 return (0);
945}
946
947struct linux_socketpair_args {
948 int domain;
949 int type;
950 int protocol;
951 l_uintptr_t rsv;
952};
953
954static int
955linux_socketpair(struct thread *td, struct linux_socketpair_args *args)
956{
957 struct socketpair_args /* {
958 int domain;
959 int type;
960 int protocol;
961 int *rsv;
962 } */ bsd_args;
963 int error, socket_flags;
964 int sv[2];
965
966 bsd_args.domain = linux_to_bsd_domain(args->domain);
967 if (bsd_args.domain != PF_LOCAL)
968 return (EAFNOSUPPORT);
969
970 socket_flags = args->type & ~LINUX_SOCK_TYPE_MASK;
971 if (socket_flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK))
972 return (EINVAL);
973 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK;
974 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX)
975 return (EINVAL);
976
977 if (args->protocol != 0 && args->protocol != PF_UNIX)
978
979 /*
980 * Use of PF_UNIX as protocol argument is not right,
981 * but Linux does it.
982 * Do not map PF_UNIX as its Linux value is identical
983 * to FreeBSD one.
984 */
985 return (EPROTONOSUPPORT);
986 else
987 bsd_args.protocol = 0;
988 bsd_args.rsv = (int *)PTRIN(args->rsv);
989 error = kern_socketpair(td, bsd_args.domain, bsd_args.type,
990 bsd_args.protocol, sv);
991 if (error)
992 return (error);
993 error = linux_set_socket_flags(td, sv[0], socket_flags);
994 if (error)
995 goto out;
996 error = linux_set_socket_flags(td, sv[1], socket_flags);
997 if (error)
998 goto out;
999
1000 error = copyout(sv, bsd_args.rsv, 2 * sizeof(int));
1001
1002out:
1003 if (error) {
1004 (void)kern_close(td, sv[0]);
1005 (void)kern_close(td, sv[1]);
1006 }
1007 return (error);
1008}
1009
1010struct linux_send_args {
1011 int s;
1012 l_uintptr_t msg;
1013 int len;
1014 int flags;
1015};
1016
1017static int
1018linux_send(struct thread *td, struct linux_send_args *args)
1019{
1020 struct sendto_args /* {
1021 int s;
1022 caddr_t buf;
1023 int len;
1024 int flags;
1025 caddr_t to;
1026 int tolen;
1027 } */ bsd_args;
1028
1029 bsd_args.s = args->s;
1030 bsd_args.buf = (caddr_t)PTRIN(args->msg);
1031 bsd_args.len = args->len;
1032 bsd_args.flags = args->flags;
1033 bsd_args.to = NULL;
1034 bsd_args.tolen = 0;
1035 return sys_sendto(td, &bsd_args);
1036}
1037
1038struct linux_recv_args {
1039 int s;
1040 l_uintptr_t msg;
1041 int len;
1042 int flags;
1043};
1044
1045static int
1046linux_recv(struct thread *td, struct linux_recv_args *args)
1047{
1048 struct recvfrom_args /* {
1049 int s;
1050 caddr_t buf;
1051 int len;
1052 int flags;
1053 struct sockaddr *from;
1054 socklen_t fromlenaddr;
1055 } */ bsd_args;
1056
1057 bsd_args.s = args->s;
1058 bsd_args.buf = (caddr_t)PTRIN(args->msg);
1059 bsd_args.len = args->len;
1060 bsd_args.flags = linux_to_bsd_msg_flags(args->flags);
1061 bsd_args.from = NULL;
1062 bsd_args.fromlenaddr = 0;
1063 return (sys_recvfrom(td, &bsd_args));
1064}
1065
1066static int
1067linux_sendto(struct thread *td, struct linux_sendto_args *args)
1068{
1069 struct msghdr msg;
1070 struct iovec aiov;
1071 int error;
1072
1073 if (linux_check_hdrincl(td, args->s) == 0)
1074 /* IP_HDRINCL set, tweak the packet before sending */
1075 return (linux_sendto_hdrincl(td, args));
1076
1077 msg.msg_name = PTRIN(args->to);
1078 msg.msg_namelen = args->tolen;
1079 msg.msg_iov = &aiov;
1080 msg.msg_iovlen = 1;
1081 msg.msg_control = NULL;
1082 msg.msg_flags = 0;
1083 aiov.iov_base = PTRIN(args->msg);
1084 aiov.iov_len = args->len;
1085 error = linux_sendit(td, args->s, &msg, args->flags, NULL,
1086 UIO_USERSPACE);
1087 return (error);
1088}
1089
1090struct linux_recvfrom_args {
1091 int s;
1092 l_uintptr_t buf;
1093 int len;
1094 int flags;
1095 l_uintptr_t from;
1096 l_uintptr_t fromlen;
1097};
1098
1099static int
1100linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args)
1101{
1102 struct recvfrom_args /* {
1103 int s;
1104 caddr_t buf;
1105 size_t len;
1106 int flags;
1107 struct sockaddr * __restrict from;
1108 socklen_t * __restrict fromlenaddr;
1109 } */ bsd_args;
1110 size_t len;
1111 int error;
1112
1113 if ((error = copyin(PTRIN(args->fromlen), &len, sizeof(size_t))))
1114 return (error);
1115
1116 bsd_args.s = args->s;
1117 bsd_args.buf = PTRIN(args->buf);
1118 bsd_args.len = args->len;
1119 bsd_args.flags = linux_to_bsd_msg_flags(args->flags);
1120 /* XXX: */
1121 bsd_args.from = (struct sockaddr * __restrict)PTRIN(args->from);
1122 bsd_args.fromlenaddr = PTRIN(args->fromlen);/* XXX */
1123
1124 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.from, len);
1125 error = sys_recvfrom(td, &bsd_args);
1126 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.from);
1127
1128 if (error)
1129 return (error);
1130 if (args->from) {
1131 error = linux_sa_put((struct osockaddr *)
1132 PTRIN(args->from));
1133 if (error)
1134 return (error);
1135 }
1136 return (0);
1137}
1138
1139struct linux_sendmsg_args {
1140 int s;
1141 l_uintptr_t msg;
1142 int flags;
1143};
1144
1145static int
1146linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args)
1147{
1148 struct cmsghdr *cmsg;
1149 struct cmsgcred cmcred;
1150 struct mbuf *control;
1151 struct msghdr msg;
1152 struct l_cmsghdr linux_cmsg;
1153 struct l_cmsghdr *ptr_cmsg;
1154 struct l_msghdr linux_msg;
1155 struct iovec *iov;
1156 socklen_t datalen;
1157 struct sockaddr *sa;
1158 sa_family_t sa_family;
1159 void *data;
1160 int error;
1161
1162 error = copyin(PTRIN(args->msg), &linux_msg, sizeof(linux_msg));
1163 if (error)
1164 return (error);
1165
1166 /*
1167 * Some Linux applications (ping) define a non-NULL control data
1168 * pointer, but a msg_controllen of 0, which is not allowed in the
1169 * FreeBSD system call interface. NULL the msg_control pointer in
1170 * order to handle this case. This should be checked, but allows the
1171 * Linux ping to work.
1172 */
1173 if (PTRIN(linux_msg.msg_control) != NULL && linux_msg.msg_controllen == 0)
1174 linux_msg.msg_control = PTROUT(NULL);
1175
1176 error = linux_to_bsd_msghdr(&msg, &linux_msg);
1177 if (error)
1178 return (error);
1179
1180#ifdef COMPAT_LINUX32
1181 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen,
1182 &iov, EMSGSIZE);
1183#else
1184 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
1185#endif
1186 if (error)
1187 return (error);
1188
1189 control = NULL;
1190 cmsg = NULL;
1191
1192 if ((ptr_cmsg = LINUX_CMSG_FIRSTHDR(&linux_msg)) != NULL) {
1193 error = kern_getsockname(td, args->s, &sa, &datalen);
1194 if (error)
1195 goto bad;
1196 sa_family = sa->sa_family;
1197 free(sa, M_SONAME);
1198
1199 error = ENOBUFS;
1200 cmsg = malloc(CMSG_HDRSZ, M_TEMP, M_WAITOK | M_ZERO);
1201 control = m_get(M_WAITOK, MT_CONTROL);
1202 if (control == NULL)
1203 goto bad;
1204
1205 do {
1206 error = copyin(ptr_cmsg, &linux_cmsg,
1207 sizeof(struct l_cmsghdr));
1208 if (error)
1209 goto bad;
1210
1211 error = EINVAL;
1212 if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr))
1213 goto bad;
1214
1215 /*
1216 * Now we support only SCM_RIGHTS and SCM_CRED,
1217 * so return EINVAL in any other cmsg_type
1218 */
1219 cmsg->cmsg_type =
1220 linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type);
1221 cmsg->cmsg_level =
1222 linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level);
1223 if (cmsg->cmsg_type == -1
1224 || cmsg->cmsg_level != SOL_SOCKET)
1225 goto bad;
1226
1227 /*
1228 * Some applications (e.g. pulseaudio) attempt to
1229 * send ancillary data even if the underlying protocol
1230 * doesn't support it which is not allowed in the
1231 * FreeBSD system call interface.
1232 */
1233 if (sa_family != AF_UNIX)
1234 continue;
1235
1236 data = LINUX_CMSG_DATA(ptr_cmsg);
1237 datalen = linux_cmsg.cmsg_len - L_CMSG_HDRSZ;
1238
1239 switch (cmsg->cmsg_type)
1240 {
1241 case SCM_RIGHTS:
1242 break;
1243
1244 case SCM_CREDS:
1245 data = &cmcred;
1246 datalen = sizeof(cmcred);
1247
1248 /*
1249 * The lower levels will fill in the structure
1250 */
1251 bzero(data, datalen);
1252 break;
1253 }
1254
1255 cmsg->cmsg_len = CMSG_LEN(datalen);
1256
1257 error = ENOBUFS;
1258 if (!m_append(control, CMSG_HDRSZ, (c_caddr_t)cmsg))
1259 goto bad;
1260 if (!m_append(control, datalen, (c_caddr_t)data))
1261 goto bad;
1262 } while ((ptr_cmsg = LINUX_CMSG_NXTHDR(&linux_msg, ptr_cmsg)));
1263
1264 if (m_length(control, NULL) == 0) {
1265 m_freem(control);
1266 control = NULL;
1267 }
1268 }
1269
1270 msg.msg_iov = iov;
1271 msg.msg_flags = 0;
1272 error = linux_sendit(td, args->s, &msg, args->flags, control,
1273 UIO_USERSPACE);
1274
1275bad:
1276 free(iov, M_IOV);
1277 if (cmsg)
1278 free(cmsg, M_TEMP);
1279 return (error);
1280}
1281
1282struct linux_recvmsg_args {
1283 int s;
1284 l_uintptr_t msg;
1285 int flags;
1286};
1287
1288static int
1289linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args)
1290{
1291 struct cmsghdr *cm;
1292 struct cmsgcred *cmcred;
1293 struct msghdr msg;
1294 struct l_cmsghdr *linux_cmsg = NULL;
1295 struct l_ucred linux_ucred;
1296 socklen_t datalen, outlen;
1297 struct l_msghdr linux_msg;
1298 struct iovec *iov, *uiov;
1299 struct mbuf *control = NULL;
1300 struct mbuf **controlp;
1301 caddr_t outbuf;
1302 void *data;
1303 int error, i, fd, fds, *fdp;
1304
1305 error = copyin(PTRIN(args->msg), &linux_msg, sizeof(linux_msg));
1306 if (error)
1307 return (error);
1308
1309 error = linux_to_bsd_msghdr(&msg, &linux_msg);
1310 if (error)
1311 return (error);
1312
1313#ifdef COMPAT_LINUX32
1314 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen,
1315 &iov, EMSGSIZE);
1316#else
1317 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
1318#endif
1319 if (error)
1320 return (error);
1321
1322 if (msg.msg_name) {
1323 error = linux_to_bsd_sockaddr((struct sockaddr *)msg.msg_name,
1324 msg.msg_namelen);
1325 if (error)
1326 goto bad;
1327 }
1328
1329 uiov = msg.msg_iov;
1330 msg.msg_iov = iov;
1331 controlp = (msg.msg_control != NULL) ? &control : NULL;
1332 error = kern_recvit(td, args->s, &msg, UIO_USERSPACE, controlp);
1333 msg.msg_iov = uiov;
1334 if (error)
1335 goto bad;
1336
1337 error = bsd_to_linux_msghdr(&msg, &linux_msg);
1338 if (error)
1339 goto bad;
1340
1341 if (linux_msg.msg_name) {
1342 error = bsd_to_linux_sockaddr((struct sockaddr *)
1343 PTRIN(linux_msg.msg_name));
1344 if (error)
1345 goto bad;
1346 }
1347 if (linux_msg.msg_name && linux_msg.msg_namelen > 2) {
1348 error = linux_sa_put(PTRIN(linux_msg.msg_name));
1349 if (error)
1350 goto bad;
1351 }
1352
1353 outbuf = PTRIN(linux_msg.msg_control);
1354 outlen = 0;
1355
1356 if (control) {
1357 linux_cmsg = malloc(L_CMSG_HDRSZ, M_TEMP, M_WAITOK | M_ZERO);
1358
1359 msg.msg_control = mtod(control, struct cmsghdr *);
1360 msg.msg_controllen = control->m_len;
1361
1362 cm = CMSG_FIRSTHDR(&msg);
1363
1364 while (cm != NULL) {
1365 linux_cmsg->cmsg_type =
1366 bsd_to_linux_cmsg_type(cm->cmsg_type);
1367 linux_cmsg->cmsg_level =
1368 bsd_to_linux_sockopt_level(cm->cmsg_level);
1369 if (linux_cmsg->cmsg_type == -1
1370 || cm->cmsg_level != SOL_SOCKET)
1371 {
1372 error = EINVAL;
1373 goto bad;
1374 }
1375
1376 data = CMSG_DATA(cm);
1377 datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data;
1378
1379 switch (cm->cmsg_type)
1380 {
1381 case SCM_RIGHTS:
1382 if (args->flags & LINUX_MSG_CMSG_CLOEXEC) {
1383 fds = datalen / sizeof(int);
1384 fdp = data;
1385 for (i = 0; i < fds; i++) {
1386 fd = *fdp++;
1387 (void)kern_fcntl(td, fd,
1388 F_SETFD, FD_CLOEXEC);
1389 }
1390 }
1391 break;
1392
1393 case SCM_CREDS:
1394 /*
1395 * Currently LOCAL_CREDS is never in
1396 * effect for Linux so no need to worry
1397 * about sockcred
1398 */
1399 if (datalen != sizeof(*cmcred)) {
1400 error = EMSGSIZE;
1401 goto bad;
1402 }
1403 cmcred = (struct cmsgcred *)data;
1404 bzero(&linux_ucred, sizeof(linux_ucred));
1405 linux_ucred.pid = cmcred->cmcred_pid;
1406 linux_ucred.uid = cmcred->cmcred_uid;
1407 linux_ucred.gid = cmcred->cmcred_gid;
1408 data = &linux_ucred;
1409 datalen = sizeof(linux_ucred);
1410 break;
1411 }
1412
1413 if (outlen + LINUX_CMSG_LEN(datalen) >
1414 linux_msg.msg_controllen) {
1415 if (outlen == 0) {
1416 error = EMSGSIZE;
1417 goto bad;
1418 } else {
1419 linux_msg.msg_flags |=
1420 LINUX_MSG_CTRUNC;
1421 goto out;
1422 }
1423 }
1424
1425 linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen);
1426
1427 error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ);
1428 if (error)
1429 goto bad;
1430 outbuf += L_CMSG_HDRSZ;
1431
1432 error = copyout(data, outbuf, datalen);
1433 if (error)
1434 goto bad;
1435
1436 outbuf += LINUX_CMSG_ALIGN(datalen);
1437 outlen += LINUX_CMSG_LEN(datalen);
1438
1439 cm = CMSG_NXTHDR(&msg, cm);
1440 }
1441 }
1442
1443out:
1444 linux_msg.msg_controllen = outlen;
1445 error = copyout(&linux_msg, PTRIN(args->msg), sizeof(linux_msg));
1446
1447bad:
1448 free(iov, M_IOV);
1449 m_freem(control);
1450 free(linux_cmsg, M_TEMP);
1451
1452 return (error);
1453}
1454
1455struct linux_shutdown_args {
1456 int s;
1457 int how;
1458};
1459
1460static int
1461linux_shutdown(struct thread *td, struct linux_shutdown_args *args)
1462{
1463 struct shutdown_args /* {
1464 int s;
1465 int how;
1466 } */ bsd_args;
1467
1468 bsd_args.s = args->s;
1469 bsd_args.how = args->how;
1470 return (sys_shutdown(td, &bsd_args));
1471}
1472
1473struct linux_setsockopt_args {
1474 int s;
1475 int level;
1476 int optname;
1477 l_uintptr_t optval;
1478 int optlen;
1479};
1480
1481static int
1482linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args)
1483{
1484 struct setsockopt_args /* {
1485 int s;
1486 int level;
1487 int name;
1488 caddr_t val;
1489 int valsize;
1490 } */ bsd_args;
1491 l_timeval linux_tv;
1492 struct timeval tv;
1493 int error, name;
1494
1495 bsd_args.s = args->s;
1496 bsd_args.level = linux_to_bsd_sockopt_level(args->level);
1497 switch (bsd_args.level) {
1498 case SOL_SOCKET:
1499 name = linux_to_bsd_so_sockopt(args->optname);
1500 switch (name) {
1501 case SO_RCVTIMEO:
1502 /* FALLTHROUGH */
1503 case SO_SNDTIMEO:
1504 error = copyin(PTRIN(args->optval), &linux_tv,
1505 sizeof(linux_tv));
1506 if (error)
1507 return (error);
1508 tv.tv_sec = linux_tv.tv_sec;
1509 tv.tv_usec = linux_tv.tv_usec;
1510 return (kern_setsockopt(td, args->s, bsd_args.level,
1511 name, &tv, UIO_SYSSPACE, sizeof(tv)));
1512 /* NOTREACHED */
1513 break;
1514 default:
1515 break;
1516 }
1517 break;
1518 case IPPROTO_IP:
1519 name = linux_to_bsd_ip_sockopt(args->optname);
1520 break;
1521 case IPPROTO_TCP:
1522 name = linux_to_bsd_tcp_sockopt(args->optname);
1523 break;
1524 default:
1525 name = -1;
1526 break;
1527 }
1528 if (name == -1)
1529 return (ENOPROTOOPT);
1530
1531 bsd_args.name = name;
1532 bsd_args.val = PTRIN(args->optval);
1533 bsd_args.valsize = args->optlen;
1534
1535 if (name == IPV6_NEXTHOP) {
1536 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val,
1537 bsd_args.valsize);
1538 error = sys_setsockopt(td, &bsd_args);
1539 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val);
1540 } else
1541 error = sys_setsockopt(td, &bsd_args);
1542
1543 return (error);
1544}
1545
1546struct linux_getsockopt_args {
1547 int s;
1548 int level;
1549 int optname;
1550 l_uintptr_t optval;
1551 l_uintptr_t optlen;
1552};
1553
1554static int
1555linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args)
1556{
1557 struct getsockopt_args /* {
1558 int s;
1559 int level;
1560 int name;
1561 caddr_t val;
1562 int *avalsize;
1563 } */ bsd_args;
1564 l_timeval linux_tv;
1565 struct timeval tv;
1566 socklen_t tv_len, xulen;
1567 struct xucred xu;
1568 struct l_ucred lxu;
1569 int error, name;
1570
1571 bsd_args.s = args->s;
1572 bsd_args.level = linux_to_bsd_sockopt_level(args->level);
1573 switch (bsd_args.level) {
1574 case SOL_SOCKET:
1575 name = linux_to_bsd_so_sockopt(args->optname);
1576 switch (name) {
1577 case SO_RCVTIMEO:
1578 /* FALLTHROUGH */
1579 case SO_SNDTIMEO:
1580 tv_len = sizeof(tv);
1581 error = kern_getsockopt(td, args->s, bsd_args.level,
1582 name, &tv, UIO_SYSSPACE, &tv_len);
1583 if (error)
1584 return (error);
1585 linux_tv.tv_sec = tv.tv_sec;
1586 linux_tv.tv_usec = tv.tv_usec;
1587 return (copyout(&linux_tv, PTRIN(args->optval),
1588 sizeof(linux_tv)));
1589 /* NOTREACHED */
1590 break;
1591 case LOCAL_PEERCRED:
1592 if (args->optlen != sizeof(lxu))
1593 return (EINVAL);
1594 xulen = sizeof(xu);
1595 error = kern_getsockopt(td, args->s, bsd_args.level,
1596 name, &xu, UIO_SYSSPACE, &xulen);
1597 if (error)
1598 return (error);
1599 /*
1600 * XXX Use 0 for pid as the FreeBSD does not cache peer pid.
1601 */
1602 lxu.pid = 0;
1603 lxu.uid = xu.cr_uid;
1604 lxu.gid = xu.cr_gid;
1605 return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu)));
1606 /* NOTREACHED */
1607 break;
1608 default:
1609 break;
1610 }
1611 break;
1612 case IPPROTO_IP:
1613 name = linux_to_bsd_ip_sockopt(args->optname);
1614 break;
1615 case IPPROTO_TCP:
1616 name = linux_to_bsd_tcp_sockopt(args->optname);
1617 break;
1618 default:
1619 name = -1;
1620 break;
1621 }
1622 if (name == -1)
1623 return (EINVAL);
1624
1625 bsd_args.name = name;
1626 bsd_args.val = PTRIN(args->optval);
1627 bsd_args.avalsize = PTRIN(args->optlen);
1628
1629 if (name == IPV6_NEXTHOP) {
1630 error = sys_getsockopt(td, &bsd_args);
1631 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val);
1632 } else
1633 error = sys_getsockopt(td, &bsd_args);
1634
1635 return (error);
1636}
1637
1638/* Argument list sizes for linux_socketcall */
1639
1640#define LINUX_AL(x) ((x) * sizeof(l_ulong))
1641
1642static const unsigned char lxs_args[] = {
1643 LINUX_AL(0) /* unused*/, LINUX_AL(3) /* socket */,
1644 LINUX_AL(3) /* bind */, LINUX_AL(3) /* connect */,
1645 LINUX_AL(2) /* listen */, LINUX_AL(3) /* accept */,
1646 LINUX_AL(3) /* getsockname */, LINUX_AL(3) /* getpeername */,
1647 LINUX_AL(4) /* socketpair */, LINUX_AL(4) /* send */,
1648 LINUX_AL(4) /* recv */, LINUX_AL(6) /* sendto */,
1649 LINUX_AL(6) /* recvfrom */, LINUX_AL(2) /* shutdown */,
1650 LINUX_AL(5) /* setsockopt */, LINUX_AL(5) /* getsockopt */,
1651 LINUX_AL(3) /* sendmsg */, LINUX_AL(3) /* recvmsg */,
1652 LINUX_AL(4) /* accept4 */
1653};
1654
1655#define LINUX_AL_SIZE sizeof(lxs_args) / sizeof(lxs_args[0]) - 1
1656
1657int
1658linux_socketcall(struct thread *td, struct linux_socketcall_args *args)
1659{
1660 l_ulong a[6];
1661 void *arg;
1662 int error;
1663
1664 if (args->what < LINUX_SOCKET || args->what > LINUX_AL_SIZE)
1665 return (EINVAL);
1666 error = copyin(PTRIN(args->args), a, lxs_args[args->what]);
1667 if (error)
1668 return (error);
1669
1670 arg = a;
1671 switch (args->what) {
1672 case LINUX_SOCKET:
1673 return (linux_socket(td, arg));
1674 case LINUX_BIND:
1675 return (linux_bind(td, arg));
1676 case LINUX_CONNECT:
1677 return (linux_connect(td, arg));
1678 case LINUX_LISTEN:
1679 return (linux_listen(td, arg));
1680 case LINUX_ACCEPT:
1681 return (linux_accept(td, arg));
1682 case LINUX_GETSOCKNAME:
1683 return (linux_getsockname(td, arg));
1684 case LINUX_GETPEERNAME:
1685 return (linux_getpeername(td, arg));
1686 case LINUX_SOCKETPAIR:
1687 return (linux_socketpair(td, arg));
1688 case LINUX_SEND:
1689 return (linux_send(td, arg));
1690 case LINUX_RECV:
1691 return (linux_recv(td, arg));
1692 case LINUX_SENDTO:
1693 return (linux_sendto(td, arg));
1694 case LINUX_RECVFROM:
1695 return (linux_recvfrom(td, arg));
1696 case LINUX_SHUTDOWN:
1697 return (linux_shutdown(td, arg));
1698 case LINUX_SETSOCKOPT:
1699 return (linux_setsockopt(td, arg));
1700 case LINUX_GETSOCKOPT:
1701 return (linux_getsockopt(td, arg));
1702 case LINUX_SENDMSG:
1703 return (linux_sendmsg(td, arg));
1704 case LINUX_RECVMSG:
1705 return (linux_recvmsg(td, arg));
1706 case LINUX_ACCEPT4:
1707 return (linux_accept4(td, arg));
1708 }
1709
1710 uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what);
1711 return (ENOSYS);
1712}