2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 1995 Søren Schmidt
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 /* XXX we use functions that might not exist. */
33 #include "opt_compat.h"
34 #include "opt_inet6.h"
36 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/sysproto.h>
40 #include <sys/capsicum.h>
41 #include <sys/fcntl.h>
43 #include <sys/filedesc.h>
44 #include <sys/limits.h>
46 #include <sys/malloc.h>
47 #include <sys/mutex.h>
49 #include <sys/socket.h>
50 #include <sys/socketvar.h>
51 #include <sys/syscallsubr.h>
54 #include <sys/syslog.h>
56 #include <sys/unistd.h>
58 #include <security/audit/audit.h>
62 #include <netinet/in.h>
63 #include <netinet/in_systm.h>
64 #include <netinet/ip.h>
65 #include <netinet/tcp.h>
67 #include <netinet/ip6.h>
68 #include <netinet6/ip6_var.h>
72 #include <machine/../linux32/linux.h>
73 #include <machine/../linux32/linux32_proto.h>
75 #include <machine/../linux/linux.h>
76 #include <machine/../linux/linux_proto.h>
78 #include <compat/linux/linux_common.h>
79 #include <compat/linux/linux_file.h>
80 #include <compat/linux/linux_mib.h>
81 #include <compat/linux/linux_socket.h>
82 #include <compat/linux/linux_timer.h>
83 #include <compat/linux/linux_util.h>
85 #define SECURITY_CONTEXT_STRING "unconfined"
87 static int linux_sendmsg_common(struct thread *, l_int, struct l_msghdr *,
89 static int linux_recvmsg_common(struct thread *, l_int, struct l_msghdr *,
90 l_uint, struct msghdr *);
91 static int linux_set_socket_flags(int, int *);
94 linux_to_bsd_sockopt_level(int level)
97 if (level == LINUX_SOL_SOCKET)
99 /* Remaining values are RFC-defined protocol numbers. */
104 bsd_to_linux_sockopt_level(int level)
107 if (level == SOL_SOCKET)
108 return (LINUX_SOL_SOCKET);
113 linux_to_bsd_ip_sockopt(int opt)
117 /* known and translated sockopts */
122 case LINUX_IP_HDRINCL:
124 case LINUX_IP_OPTIONS:
126 case LINUX_IP_RECVOPTS:
127 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_RECVOPTS");
128 return (IP_RECVOPTS);
129 case LINUX_IP_RETOPTS:
130 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_REETOPTS");
132 case LINUX_IP_RECVTTL:
133 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_RECVTTL");
135 case LINUX_IP_RECVTOS:
136 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_RECVTOS");
138 case LINUX_IP_FREEBIND:
139 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_FREEBIND");
141 case LINUX_IP_IPSEC_POLICY:
142 /* we have this option, but not documented in ip(4) manpage */
143 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_IPSEC_POLICY");
144 return (IP_IPSEC_POLICY);
145 case LINUX_IP_MINTTL:
146 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_MINTTL");
148 case LINUX_IP_MULTICAST_IF:
149 return (IP_MULTICAST_IF);
150 case LINUX_IP_MULTICAST_TTL:
151 return (IP_MULTICAST_TTL);
152 case LINUX_IP_MULTICAST_LOOP:
153 return (IP_MULTICAST_LOOP);
154 case LINUX_IP_ADD_MEMBERSHIP:
155 return (IP_ADD_MEMBERSHIP);
156 case LINUX_IP_DROP_MEMBERSHIP:
157 return (IP_DROP_MEMBERSHIP);
158 case LINUX_IP_UNBLOCK_SOURCE:
159 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_UNBLOCK_SOURCE");
160 return (IP_UNBLOCK_SOURCE);
161 case LINUX_IP_BLOCK_SOURCE:
162 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_BLOCK_SOURCE");
163 return (IP_BLOCK_SOURCE);
164 case LINUX_IP_ADD_SOURCE_MEMBERSHIP:
165 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_ADD_SOURCE_MEMBERSHIP");
166 return (IP_ADD_SOURCE_MEMBERSHIP);
167 case LINUX_IP_DROP_SOURCE_MEMBERSHIP:
168 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_DROP_SOURCE_MEMBERSHIP");
169 return (IP_DROP_SOURCE_MEMBERSHIP);
170 case LINUX_MCAST_JOIN_GROUP:
171 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_MCAST_JOIN_GROUP");
172 return (MCAST_JOIN_GROUP);
173 case LINUX_MCAST_LEAVE_GROUP:
174 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_MCAST_LEAVE_GROUP");
175 return (MCAST_LEAVE_GROUP);
176 case LINUX_MCAST_JOIN_SOURCE_GROUP:
177 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_MCAST_JOIN_SOURCE_GROUP");
178 return (MCAST_JOIN_SOURCE_GROUP);
179 case LINUX_MCAST_LEAVE_SOURCE_GROUP:
180 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_MCAST_LEAVE_SOURCE_GROUP");
181 return (MCAST_LEAVE_SOURCE_GROUP);
183 /* known but not implemented sockopts */
184 case LINUX_IP_ROUTER_ALERT:
185 LINUX_RATELIMIT_MSG_OPT1(
186 "unsupported IPv4 socket option IP_ROUTER_ALERT (%d), you can not do user-space routing from linux programs",
189 case LINUX_IP_PKTINFO:
190 LINUX_RATELIMIT_MSG_OPT1(
191 "unsupported IPv4 socket option IP_PKTINFO (%d), you can not get extended packet info for datagram sockets in linux programs",
194 case LINUX_IP_PKTOPTIONS:
195 LINUX_RATELIMIT_MSG_OPT1(
196 "unsupported IPv4 socket option IP_PKTOPTIONS (%d)",
199 case LINUX_IP_MTU_DISCOVER:
200 LINUX_RATELIMIT_MSG_OPT1(
201 "unsupported IPv4 socket option IP_MTU_DISCOVER (%d), your linux program can not control path-MTU discovery",
204 case LINUX_IP_RECVERR:
205 /* needed by steam */
206 LINUX_RATELIMIT_MSG_OPT1(
207 "unsupported IPv4 socket option IP_RECVERR (%d), you can not get extended reliability info in linux programs",
211 LINUX_RATELIMIT_MSG_OPT1(
212 "unsupported IPv4 socket option IP_MTU (%d), your linux program can not control the MTU on this socket",
215 case LINUX_IP_XFRM_POLICY:
216 LINUX_RATELIMIT_MSG_OPT1(
217 "unsupported IPv4 socket option IP_XFRM_POLICY (%d)",
220 case LINUX_IP_PASSSEC:
221 /* needed by steam */
222 LINUX_RATELIMIT_MSG_OPT1(
223 "unsupported IPv4 socket option IP_PASSSEC (%d), you can not get IPSEC related credential information associated with this socket in linux programs -- if you do not use IPSEC, you can ignore this",
226 case LINUX_IP_TRANSPARENT:
227 /* IP_BINDANY or more? */
228 LINUX_RATELIMIT_MSG_OPT1(
229 "unsupported IPv4 socket option IP_TRANSPARENT (%d), you can not enable transparent proxying in linux programs -- note, IP_FREEBIND is supported, no idea if the FreeBSD IP_BINDANY is equivalent to the Linux IP_TRANSPARENT or not, any info is welcome",
232 case LINUX_IP_NODEFRAG:
233 LINUX_RATELIMIT_MSG_OPT1(
234 "unsupported IPv4 socket option IP_NODEFRAG (%d)",
237 case LINUX_IP_CHECKSUM:
238 LINUX_RATELIMIT_MSG_OPT1(
239 "unsupported IPv4 socket option IP_CHECKSUM (%d)",
242 case LINUX_IP_BIND_ADDRESS_NO_PORT:
243 LINUX_RATELIMIT_MSG_OPT1(
244 "unsupported IPv4 socket option IP_BIND_ADDRESS_NO_PORT (%d)",
247 case LINUX_IP_RECVFRAGSIZE:
248 LINUX_RATELIMIT_MSG_OPT1(
249 "unsupported IPv4 socket option IP_RECVFRAGSIZE (%d)",
252 case LINUX_MCAST_MSFILTER:
253 LINUX_RATELIMIT_MSG_OPT1(
254 "unsupported IPv4 socket option IP_MCAST_MSFILTER (%d)",
257 case LINUX_IP_MULTICAST_ALL:
258 LINUX_RATELIMIT_MSG_OPT1(
259 "unsupported IPv4 socket option IP_MULTICAST_ALL (%d), your linux program will not see all multicast groups joined by the entire system, only those the program joined itself on this socket",
262 case LINUX_IP_UNICAST_IF:
263 LINUX_RATELIMIT_MSG_OPT1(
264 "unsupported IPv4 socket option IP_UNICAST_IF (%d)",
268 /* unknown sockopts */
275 linux_to_bsd_ip6_sockopt(int opt)
279 /* known and translated sockopts */
280 case LINUX_IPV6_2292PKTINFO:
281 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292PKTINFO");
282 return (IPV6_2292PKTINFO);
283 case LINUX_IPV6_2292HOPOPTS:
284 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292HOPOPTS");
285 return (IPV6_2292HOPOPTS);
286 case LINUX_IPV6_2292DSTOPTS:
287 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292DSTOPTS");
288 return (IPV6_2292DSTOPTS);
289 case LINUX_IPV6_2292RTHDR:
290 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292RTHDR");
291 return (IPV6_2292RTHDR);
292 case LINUX_IPV6_2292PKTOPTIONS:
293 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292PKTOPTIONS");
294 return (IPV6_2292PKTOPTIONS);
295 case LINUX_IPV6_CHECKSUM:
296 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_CHECKSUM");
297 return (IPV6_CHECKSUM);
298 case LINUX_IPV6_2292HOPLIMIT:
299 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292HOPLIMIT");
300 return (IPV6_2292HOPLIMIT);
301 case LINUX_IPV6_NEXTHOP:
302 return (IPV6_NEXTHOP);
303 case LINUX_IPV6_UNICAST_HOPS:
304 return (IPV6_UNICAST_HOPS);
305 case LINUX_IPV6_MULTICAST_IF:
306 return (IPV6_MULTICAST_IF);
307 case LINUX_IPV6_MULTICAST_HOPS:
308 return (IPV6_MULTICAST_HOPS);
309 case LINUX_IPV6_MULTICAST_LOOP:
310 return (IPV6_MULTICAST_LOOP);
311 case LINUX_IPV6_ADD_MEMBERSHIP:
312 return (IPV6_JOIN_GROUP);
313 case LINUX_IPV6_DROP_MEMBERSHIP:
314 return (IPV6_LEAVE_GROUP);
315 case LINUX_IPV6_V6ONLY:
316 return (IPV6_V6ONLY);
317 case LINUX_IPV6_IPSEC_POLICY:
318 /* we have this option, but not documented in ip6(4) manpage */
319 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_IPSEC_POLICY");
320 return (IPV6_IPSEC_POLICY);
321 case LINUX_MCAST_JOIN_GROUP:
322 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_JOIN_GROUP");
323 return (IPV6_JOIN_GROUP);
324 case LINUX_MCAST_LEAVE_GROUP:
325 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_LEAVE_GROUP");
326 return (IPV6_LEAVE_GROUP);
327 case LINUX_IPV6_RECVPKTINFO:
328 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVPKTINFO");
329 return (IPV6_RECVPKTINFO);
330 case LINUX_IPV6_PKTINFO:
331 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_PKTINFO");
332 return (IPV6_PKTINFO);
333 case LINUX_IPV6_RECVHOPLIMIT:
334 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVHOPLIMIT");
335 return (IPV6_RECVHOPLIMIT);
336 case LINUX_IPV6_HOPLIMIT:
337 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_HOPLIMIT");
338 return (IPV6_HOPLIMIT);
339 case LINUX_IPV6_RECVHOPOPTS:
340 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVHOPOPTS");
341 return (IPV6_RECVHOPOPTS);
342 case LINUX_IPV6_HOPOPTS:
343 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_HOPOPTS");
344 return (IPV6_HOPOPTS);
345 case LINUX_IPV6_RTHDRDSTOPTS:
346 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RTHDRDSTOPTS");
347 return (IPV6_RTHDRDSTOPTS);
348 case LINUX_IPV6_RECVRTHDR:
349 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVRTHDR");
350 return (IPV6_RECVRTHDR);
351 case LINUX_IPV6_RTHDR:
352 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RTHDR");
354 case LINUX_IPV6_RECVDSTOPTS:
355 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVDSTOPTS");
356 return (IPV6_RECVDSTOPTS);
357 case LINUX_IPV6_DSTOPTS:
358 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_DSTOPTS");
359 return (IPV6_DSTOPTS);
360 case LINUX_IPV6_RECVPATHMTU:
361 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVPATHMTU");
362 return (IPV6_RECVPATHMTU);
363 case LINUX_IPV6_PATHMTU:
364 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_PATHMTU");
365 return (IPV6_PATHMTU);
366 case LINUX_IPV6_DONTFRAG:
367 return (IPV6_DONTFRAG);
368 case LINUX_IPV6_AUTOFLOWLABEL:
369 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_AUTOFLOWLABEL");
370 return (IPV6_AUTOFLOWLABEL);
371 case LINUX_IPV6_ORIGDSTADDR:
372 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_ORIGDSTADDR");
373 return (IPV6_ORIGDSTADDR);
374 case LINUX_IPV6_FREEBIND:
375 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_FREEBIND");
376 return (IPV6_BINDANY);
378 /* known but not implemented sockopts */
379 case LINUX_IPV6_ADDRFORM:
380 LINUX_RATELIMIT_MSG_OPT1(
381 "unsupported IPv6 socket option IPV6_ADDRFORM (%d), you linux program can not convert the socket to IPv4",
384 case LINUX_IPV6_AUTHHDR:
385 LINUX_RATELIMIT_MSG_OPT1(
386 "unsupported IPv6 socket option IPV6_AUTHHDR (%d), your linux program can not get the authentication header info of IPv6 packets",
389 case LINUX_IPV6_FLOWINFO:
390 LINUX_RATELIMIT_MSG_OPT1(
391 "unsupported IPv6 socket option IPV6_FLOWINFO (%d), your linux program can not get the flowid of IPv6 packets",
394 case LINUX_IPV6_ROUTER_ALERT:
395 LINUX_RATELIMIT_MSG_OPT1(
396 "unsupported IPv6 socket option IPV6_ROUTER_ALERT (%d), you can not do user-space routing from linux programs",
399 case LINUX_IPV6_MTU_DISCOVER:
400 LINUX_RATELIMIT_MSG_OPT1(
401 "unsupported IPv6 socket option IPV6_MTU_DISCOVER (%d), your linux program can not control path-MTU discovery",
405 LINUX_RATELIMIT_MSG_OPT1(
406 "unsupported IPv6 socket option IPV6_MTU (%d), your linux program can not control the MTU on this socket",
409 case LINUX_IPV6_JOIN_ANYCAST:
410 LINUX_RATELIMIT_MSG_OPT1(
411 "unsupported IPv6 socket option IPV6_JOIN_ANYCAST (%d)",
414 case LINUX_IPV6_LEAVE_ANYCAST:
415 LINUX_RATELIMIT_MSG_OPT1(
416 "unsupported IPv6 socket option IPV6_LEAVE_ANYCAST (%d)",
419 case LINUX_IPV6_MULTICAST_ALL:
420 LINUX_RATELIMIT_MSG_OPT1(
421 "unsupported IPv6 socket option IPV6_MULTICAST_ALL (%d)",
424 case LINUX_IPV6_ROUTER_ALERT_ISOLATE:
425 LINUX_RATELIMIT_MSG_OPT1(
426 "unsupported IPv6 socket option IPV6_ROUTER_ALERT_ISOLATE (%d)",
429 case LINUX_IPV6_FLOWLABEL_MGR:
430 LINUX_RATELIMIT_MSG_OPT1(
431 "unsupported IPv6 socket option IPV6_FLOWLABEL_MGR (%d)",
434 case LINUX_IPV6_FLOWINFO_SEND:
435 LINUX_RATELIMIT_MSG_OPT1(
436 "unsupported IPv6 socket option IPV6_FLOWINFO_SEND (%d)",
439 case LINUX_IPV6_XFRM_POLICY:
440 LINUX_RATELIMIT_MSG_OPT1(
441 "unsupported IPv6 socket option IPV6_XFRM_POLICY (%d)",
444 case LINUX_IPV6_HDRINCL:
445 LINUX_RATELIMIT_MSG_OPT1(
446 "unsupported IPv6 socket option IPV6_HDRINCL (%d)",
449 case LINUX_MCAST_BLOCK_SOURCE:
450 LINUX_RATELIMIT_MSG_OPT1(
451 "unsupported IPv6 socket option MCAST_BLOCK_SOURCE (%d), your linux program may see more multicast stuff than it wants",
454 case LINUX_MCAST_UNBLOCK_SOURCE:
455 LINUX_RATELIMIT_MSG_OPT1(
456 "unsupported IPv6 socket option MCAST_UNBLOCK_SOURCE (%d), your linux program may not see all the multicast stuff it wants",
459 case LINUX_MCAST_JOIN_SOURCE_GROUP:
460 LINUX_RATELIMIT_MSG_OPT1(
461 "unsupported IPv6 socket option MCAST_JOIN_SOURCE_GROUP (%d), your linux program is not able to join a multicast source group",
464 case LINUX_MCAST_LEAVE_SOURCE_GROUP:
465 LINUX_RATELIMIT_MSG_OPT1(
466 "unsupported IPv6 socket option MCAST_LEAVE_SOURCE_GROUP (%d), your linux program is not able to leave a multicast source group -- but it was also not able to join one, so no issue",
469 case LINUX_MCAST_MSFILTER:
470 LINUX_RATELIMIT_MSG_OPT1(
471 "unsupported IPv6 socket option MCAST_MSFILTER (%d), your linux program can not manipulate the multicast filter, it may see more multicast data than it wants to see",
474 case LINUX_IPV6_ADDR_PREFERENCES:
475 LINUX_RATELIMIT_MSG_OPT1(
476 "unsupported IPv6 socket option IPV6_ADDR_PREFERENCES (%d)",
479 case LINUX_IPV6_MINHOPCOUNT:
480 LINUX_RATELIMIT_MSG_OPT1(
481 "unsupported IPv6 socket option IPV6_MINHOPCOUNT (%d)",
484 case LINUX_IPV6_TRANSPARENT:
485 /* IP_BINDANY or more? */
486 LINUX_RATELIMIT_MSG_OPT1(
487 "unsupported IPv6 socket option IPV6_TRANSPARENT (%d), you can not enable transparent proxying in linux programs -- note, IP_FREEBIND is supported, no idea if the FreeBSD IP_BINDANY is equivalent to the Linux IP_TRANSPARENT or not, any info is welcome",
490 case LINUX_IPV6_UNICAST_IF:
491 LINUX_RATELIMIT_MSG_OPT1(
492 "unsupported IPv6 socket option IPV6_UNICAST_IF (%d)",
495 case LINUX_IPV6_RECVFRAGSIZE:
496 LINUX_RATELIMIT_MSG_OPT1(
497 "unsupported IPv6 socket option IPV6_RECVFRAGSIZE (%d)",
501 /* unknown sockopts */
508 linux_to_bsd_so_sockopt(int opt)
514 case LINUX_SO_REUSEADDR:
515 return (SO_REUSEADDR);
520 case LINUX_SO_DONTROUTE:
521 return (SO_DONTROUTE);
522 case LINUX_SO_BROADCAST:
523 return (SO_BROADCAST);
524 case LINUX_SO_SNDBUF:
525 case LINUX_SO_SNDBUFFORCE:
527 case LINUX_SO_RCVBUF:
528 case LINUX_SO_RCVBUFFORCE:
530 case LINUX_SO_KEEPALIVE:
531 return (SO_KEEPALIVE);
532 case LINUX_SO_OOBINLINE:
533 return (SO_OOBINLINE);
534 case LINUX_SO_LINGER:
536 case LINUX_SO_REUSEPORT:
537 return (SO_REUSEPORT_LB);
538 case LINUX_SO_PASSCRED:
539 return (LOCAL_CREDS_PERSISTENT);
540 case LINUX_SO_PEERCRED:
541 return (LOCAL_PEERCRED);
542 case LINUX_SO_RCVLOWAT:
543 return (SO_RCVLOWAT);
544 case LINUX_SO_SNDLOWAT:
545 return (SO_SNDLOWAT);
546 case LINUX_SO_RCVTIMEO:
547 return (SO_RCVTIMEO);
548 case LINUX_SO_SNDTIMEO:
549 return (SO_SNDTIMEO);
550 case LINUX_SO_TIMESTAMP:
551 return (SO_TIMESTAMP);
552 case LINUX_SO_ACCEPTCONN:
553 return (SO_ACCEPTCONN);
554 case LINUX_SO_PROTOCOL:
555 return (SO_PROTOCOL);
561 linux_to_bsd_tcp_sockopt(int opt)
565 case LINUX_TCP_NODELAY:
566 return (TCP_NODELAY);
567 case LINUX_TCP_MAXSEG:
571 case LINUX_TCP_KEEPIDLE:
572 return (TCP_KEEPIDLE);
573 case LINUX_TCP_KEEPINTVL:
574 return (TCP_KEEPINTVL);
575 case LINUX_TCP_KEEPCNT:
576 return (TCP_KEEPCNT);
578 LINUX_RATELIMIT_MSG_OPT1(
579 "unsupported TCP socket option TCP_INFO (%d)", opt);
581 case LINUX_TCP_MD5SIG:
588 linux_to_bsd_msg_flags(int flags)
592 if (flags & LINUX_MSG_OOB)
593 ret_flags |= MSG_OOB;
594 if (flags & LINUX_MSG_PEEK)
595 ret_flags |= MSG_PEEK;
596 if (flags & LINUX_MSG_DONTROUTE)
597 ret_flags |= MSG_DONTROUTE;
598 if (flags & LINUX_MSG_CTRUNC)
599 ret_flags |= MSG_CTRUNC;
600 if (flags & LINUX_MSG_TRUNC)
601 ret_flags |= MSG_TRUNC;
602 if (flags & LINUX_MSG_DONTWAIT)
603 ret_flags |= MSG_DONTWAIT;
604 if (flags & LINUX_MSG_EOR)
605 ret_flags |= MSG_EOR;
606 if (flags & LINUX_MSG_WAITALL)
607 ret_flags |= MSG_WAITALL;
608 if (flags & LINUX_MSG_NOSIGNAL)
609 ret_flags |= MSG_NOSIGNAL;
610 if (flags & LINUX_MSG_PROXY)
611 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_PROXY (%d) not handled",
613 if (flags & LINUX_MSG_FIN)
614 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_FIN (%d) not handled",
616 if (flags & LINUX_MSG_SYN)
617 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_SYN (%d) not handled",
619 if (flags & LINUX_MSG_CONFIRM)
620 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_CONFIRM (%d) not handled",
622 if (flags & LINUX_MSG_RST)
623 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_RST (%d) not handled",
625 if (flags & LINUX_MSG_ERRQUEUE)
626 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_ERRQUEUE (%d) not handled",
632 linux_to_bsd_cmsg_type(int cmsg_type)
636 case LINUX_SCM_RIGHTS:
638 case LINUX_SCM_CREDENTIALS:
645 bsd_to_linux_cmsg_type(int cmsg_type)
650 return (LINUX_SCM_RIGHTS);
652 return (LINUX_SCM_CREDENTIALS);
654 return (LINUX_SCM_CREDENTIALS);
656 return (LINUX_SCM_TIMESTAMP);
662 linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr)
664 if (lhdr->msg_controllen > INT_MAX)
667 bhdr->msg_name = PTRIN(lhdr->msg_name);
668 bhdr->msg_namelen = lhdr->msg_namelen;
669 bhdr->msg_iov = PTRIN(lhdr->msg_iov);
670 bhdr->msg_iovlen = lhdr->msg_iovlen;
671 bhdr->msg_control = PTRIN(lhdr->msg_control);
674 * msg_controllen is skipped since BSD and LINUX control messages
675 * are potentially different sizes (e.g. the cred structure used
676 * by SCM_CREDS is different between the two operating system).
678 * The caller can set it (if necessary) after converting all the
682 bhdr->msg_flags = linux_to_bsd_msg_flags(lhdr->msg_flags);
687 bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr)
689 lhdr->msg_name = PTROUT(bhdr->msg_name);
690 lhdr->msg_namelen = bhdr->msg_namelen;
691 lhdr->msg_iov = PTROUT(bhdr->msg_iov);
692 lhdr->msg_iovlen = bhdr->msg_iovlen;
693 lhdr->msg_control = PTROUT(bhdr->msg_control);
696 * msg_controllen is skipped since BSD and LINUX control messages
697 * are potentially different sizes (e.g. the cred structure used
698 * by SCM_CREDS is different between the two operating system).
700 * The caller can set it (if necessary) after converting all the
704 /* msg_flags skipped */
709 linux_set_socket_flags(int lflags, int *flags)
712 if (lflags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK))
714 if (lflags & LINUX_SOCK_NONBLOCK)
715 *flags |= SOCK_NONBLOCK;
716 if (lflags & LINUX_SOCK_CLOEXEC)
717 *flags |= SOCK_CLOEXEC;
722 linux_copyout_sockaddr(const struct sockaddr *sa, void *uaddr, size_t len)
724 struct l_sockaddr *lsa;
727 error = bsd_to_linux_sockaddr(sa, &lsa, len);
731 error = copyout(lsa, uaddr, len);
738 linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags,
739 struct mbuf *control, enum uio_seg segflg)
744 if (mp->msg_name != NULL) {
745 len = mp->msg_namelen;
746 error = linux_to_bsd_sockaddr(mp->msg_name, &to, &len);
753 error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control,
761 /* Return 0 if IP_HDRINCL is set for the given socket. */
763 linux_check_hdrincl(struct thread *td, int s)
768 size_val = sizeof(optval);
769 error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL,
770 &optval, UIO_SYSSPACE, &size_val);
774 return (optval == 0);
778 * Updated sendto() when IP_HDRINCL is set:
779 * tweak endian-dependent fields in the IP packet.
782 linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args)
785 * linux_ip_copysize defines how many bytes we should copy
786 * from the beginning of the IP packet before we customize it for BSD.
787 * It should include all the fields we modify (ip_len and ip_off).
789 #define linux_ip_copysize 8
793 struct iovec aiov[1];
796 /* Check that the packet isn't too big or too small. */
797 if (linux_args->len < linux_ip_copysize ||
798 linux_args->len > IP_MAXPACKET)
801 packet = (struct ip *)malloc(linux_args->len, M_LINUX, M_WAITOK);
803 /* Make kernel copy of the packet to be sent */
804 if ((error = copyin(PTRIN(linux_args->msg), packet,
808 /* Convert fields from Linux to BSD raw IP socket format */
809 packet->ip_len = linux_args->len;
810 packet->ip_off = ntohs(packet->ip_off);
812 /* Prepare the msghdr and iovec structures describing the new packet */
813 msg.msg_name = PTRIN(linux_args->to);
814 msg.msg_namelen = linux_args->tolen;
817 msg.msg_control = NULL;
819 aiov[0].iov_base = (char *)packet;
820 aiov[0].iov_len = linux_args->len;
821 error = linux_sendit(td, linux_args->s, &msg, linux_args->flags,
824 free(packet, M_LINUX);
828 static const char *linux_netlink_names[] = {
829 [LINUX_NETLINK_ROUTE] = "ROUTE",
830 [LINUX_NETLINK_SOCK_DIAG] = "SOCK_DIAG",
831 [LINUX_NETLINK_NFLOG] = "NFLOG",
832 [LINUX_NETLINK_SELINUX] = "SELINUX",
833 [LINUX_NETLINK_AUDIT] = "AUDIT",
834 [LINUX_NETLINK_FIB_LOOKUP] = "FIB_LOOKUP",
835 [LINUX_NETLINK_NETFILTER] = "NETFILTER",
836 [LINUX_NETLINK_KOBJECT_UEVENT] = "KOBJECT_UEVENT",
840 linux_socket(struct thread *td, struct linux_socket_args *args)
842 int domain, retval_socket, type;
844 type = args->type & LINUX_SOCK_TYPE_MASK;
845 if (type < 0 || type > LINUX_SOCK_MAX)
847 retval_socket = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK,
849 if (retval_socket != 0)
850 return (retval_socket);
851 domain = linux_to_bsd_domain(args->domain);
853 /* Mask off SOCK_NONBLOCK / CLOEXEC for error messages. */
854 type = args->type & LINUX_SOCK_TYPE_MASK;
855 if (args->domain == LINUX_AF_NETLINK &&
856 args->protocol == LINUX_NETLINK_AUDIT) {
857 ; /* Do nothing, quietly. */
858 } else if (args->domain == LINUX_AF_NETLINK) {
861 if (args->protocol >= 0 &&
862 args->protocol < nitems(linux_netlink_names))
863 nl_name = linux_netlink_names[args->protocol];
868 "unsupported socket(AF_NETLINK, %d, "
869 "NETLINK_%s)", type, nl_name);
872 "unsupported socket(AF_NETLINK, %d, %d)",
873 type, args->protocol);
875 linux_msg(curthread, "unsupported socket domain %d, "
876 "type %d, protocol %d", args->domain, type,
879 return (EAFNOSUPPORT);
882 retval_socket = kern_socket(td, domain, type, args->protocol);
884 return (retval_socket);
887 && (args->protocol == IPPROTO_RAW || args->protocol == 0)
888 && domain == PF_INET) {
889 /* It's a raw IP socket: set the IP_HDRINCL option. */
893 /* We ignore any error returned by kern_setsockopt() */
894 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL,
895 &hdrincl, UIO_SYSSPACE, sizeof(hdrincl));
899 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default
900 * and some apps depend on this. So, set V6ONLY to 0 for Linux apps.
901 * For simplicity we do this unconditionally of the net.inet6.ip6.v6only
904 if (domain == PF_INET6) {
908 /* We ignore any error returned by setsockopt() */
909 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY,
910 &v6only, UIO_SYSSPACE, sizeof(v6only));
914 return (retval_socket);
918 linux_bind(struct thread *td, struct linux_bind_args *args)
923 error = linux_to_bsd_sockaddr(PTRIN(args->name), &sa,
928 error = kern_bindat(td, AT_FDCWD, args->s, sa);
932 if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in))
938 linux_connect(struct thread *td, struct linux_connect_args *args)
946 error = linux_to_bsd_sockaddr(PTRIN(args->name), &sa,
951 error = kern_connectat(td, AT_FDCWD, args->s, sa);
953 if (error != EISCONN)
957 * Linux doesn't return EISCONN the first time it occurs,
958 * when on a non-blocking socket. Instead it returns the
959 * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD.
961 error = getsock_cap(td, args->s, &cap_connect_rights,
968 if (fflag & FNONBLOCK) {
970 if (so->so_emuldata == 0)
971 error = so->so_error;
972 so->so_emuldata = (void *)1;
981 linux_listen(struct thread *td, struct linux_listen_args *args)
984 return (kern_listen(td, args->s, args->backlog));
988 linux_accept_common(struct thread *td, int s, l_uintptr_t addr,
989 l_uintptr_t namelen, int flags)
992 struct file *fp, *fp1;
1001 error = linux_set_socket_flags(flags, &bflags);
1005 if (PTRIN(addr) == NULL) {
1007 error = kern_accept4(td, s, NULL, NULL, bflags, NULL);
1009 error = copyin(PTRIN(namelen), &len, sizeof(len));
1014 error = kern_accept4(td, s, &sa, &len, bflags, &fp);
1018 * Translate errno values into ones used by Linux.
1022 * XXX. This is wrong, different sockaddr structures
1023 * have different sizes.
1027 if (namelen != sizeof(struct sockaddr_in))
1031 error1 = getsock_cap(td, s, &cap_accept_rights, &fp1, NULL, NULL);
1037 if (so->so_type == SOCK_DGRAM)
1046 error = linux_copyout_sockaddr(sa, PTRIN(addr), len);
1049 * XXX: We should also copyout the len, shouldn't we?
1053 fdclose(td, fp, td->td_retval[0]);
1054 td->td_retval[0] = 0;
1064 linux_accept(struct thread *td, struct linux_accept_args *args)
1067 return (linux_accept_common(td, args->s, args->addr,
1072 linux_accept4(struct thread *td, struct linux_accept4_args *args)
1075 return (linux_accept_common(td, args->s, args->addr,
1076 args->namelen, args->flags));
1080 linux_getsockname(struct thread *td, struct linux_getsockname_args *args)
1082 struct sockaddr *sa;
1085 error = copyin(PTRIN(args->namelen), &len, sizeof(len));
1089 error = kern_getsockname(td, args->s, &sa, &len);
1094 error = linux_copyout_sockaddr(sa, PTRIN(args->addr), len);
1098 error = copyout(&len, PTRIN(args->namelen), sizeof(len));
1103 linux_getpeername(struct thread *td, struct linux_getpeername_args *args)
1105 struct sockaddr *sa;
1108 error = copyin(PTRIN(args->namelen), &len, sizeof(len));
1114 error = kern_getpeername(td, args->s, &sa, &len);
1119 error = linux_copyout_sockaddr(sa, PTRIN(args->addr), len);
1123 error = copyout(&len, PTRIN(args->namelen), sizeof(len));
1128 linux_socketpair(struct thread *td, struct linux_socketpair_args *args)
1130 int domain, error, sv[2], type;
1132 domain = linux_to_bsd_domain(args->domain);
1133 if (domain != PF_LOCAL)
1134 return (EAFNOSUPPORT);
1135 type = args->type & LINUX_SOCK_TYPE_MASK;
1136 if (type < 0 || type > LINUX_SOCK_MAX)
1138 error = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK,
1142 if (args->protocol != 0 && args->protocol != PF_UNIX) {
1144 * Use of PF_UNIX as protocol argument is not right,
1145 * but Linux does it.
1146 * Do not map PF_UNIX as its Linux value is identical
1149 return (EPROTONOSUPPORT);
1151 error = kern_socketpair(td, domain, type, 0, sv);
1154 error = copyout(sv, PTRIN(args->rsv), 2 * sizeof(int));
1156 (void)kern_close(td, sv[0]);
1157 (void)kern_close(td, sv[1]);
1162 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1163 struct linux_send_args {
1171 linux_send(struct thread *td, struct linux_send_args *args)
1173 struct sendto_args /* {
1184 bsd_args.s = args->s;
1185 bsd_args.buf = (caddr_t)PTRIN(args->msg);
1186 bsd_args.len = args->len;
1187 bsd_args.flags = linux_to_bsd_msg_flags(args->flags);
1190 error = sys_sendto(td, &bsd_args);
1191 if (error == ENOTCONN) {
1193 * Linux doesn't return ENOTCONN for non-blocking sockets.
1194 * Instead it returns the EAGAIN.
1196 error = getsock_cap(td, args->s, &cap_send_rights, &fp,
1199 if (fflag & FNONBLOCK)
1207 struct linux_recv_args {
1215 linux_recv(struct thread *td, struct linux_recv_args *args)
1217 struct recvfrom_args /* {
1222 struct sockaddr *from;
1223 socklen_t fromlenaddr;
1226 bsd_args.s = args->s;
1227 bsd_args.buf = (caddr_t)PTRIN(args->msg);
1228 bsd_args.len = args->len;
1229 bsd_args.flags = linux_to_bsd_msg_flags(args->flags);
1230 bsd_args.from = NULL;
1231 bsd_args.fromlenaddr = 0;
1232 return (sys_recvfrom(td, &bsd_args));
1234 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1237 linux_sendto(struct thread *td, struct linux_sendto_args *args)
1242 if (linux_check_hdrincl(td, args->s) == 0)
1243 /* IP_HDRINCL set, tweak the packet before sending */
1244 return (linux_sendto_hdrincl(td, args));
1246 msg.msg_name = PTRIN(args->to);
1247 msg.msg_namelen = args->tolen;
1248 msg.msg_iov = &aiov;
1250 msg.msg_control = NULL;
1252 aiov.iov_base = PTRIN(args->msg);
1253 aiov.iov_len = args->len;
1254 return (linux_sendit(td, args->s, &msg, args->flags, NULL,
1259 linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args)
1261 struct sockaddr *sa;
1266 if (PTRIN(args->fromlen) != NULL) {
1267 error = copyin(PTRIN(args->fromlen), &fromlen,
1273 sa = malloc(fromlen, M_SONAME, M_WAITOK);
1280 msg.msg_namelen = fromlen;
1281 msg.msg_iov = &aiov;
1283 aiov.iov_base = PTRIN(args->buf);
1284 aiov.iov_len = args->len;
1285 msg.msg_control = 0;
1286 msg.msg_flags = linux_to_bsd_msg_flags(args->flags);
1288 error = kern_recvit(td, args->s, &msg, UIO_SYSSPACE, NULL);
1292 if (PTRIN(args->from) != NULL)
1293 error = linux_copyout_sockaddr(sa, PTRIN(args->from), msg.msg_namelen);
1295 if (error == 0 && PTRIN(args->fromlen) != NULL)
1296 error = copyout(&msg.msg_namelen, PTRIN(args->fromlen),
1297 sizeof(msg.msg_namelen));
1304 linux_sendmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr,
1307 struct cmsghdr *cmsg;
1308 struct mbuf *control;
1310 struct l_cmsghdr linux_cmsg;
1311 struct l_cmsghdr *ptr_cmsg;
1312 struct l_msghdr linux_msghdr;
1315 struct sockaddr *sa;
1317 sa_family_t sa_family;
1324 error = copyin(msghdr, &linux_msghdr, sizeof(linux_msghdr));
1329 * Some Linux applications (ping) define a non-NULL control data
1330 * pointer, but a msg_controllen of 0, which is not allowed in the
1331 * FreeBSD system call interface. NULL the msg_control pointer in
1332 * order to handle this case. This should be checked, but allows the
1333 * Linux ping to work.
1335 if (PTRIN(linux_msghdr.msg_control) != NULL &&
1336 linux_msghdr.msg_controllen == 0)
1337 linux_msghdr.msg_control = PTROUT(NULL);
1339 error = linux_to_bsd_msghdr(&msg, &linux_msghdr);
1343 #ifdef COMPAT_LINUX32
1344 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen,
1347 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
1354 error = kern_getsockname(td, s, &sa, &datalen);
1357 sa_family = sa->sa_family;
1360 if (flags & LINUX_MSG_OOB) {
1362 if (sa_family == AF_UNIX)
1365 error = getsock_cap(td, s, &cap_send_rights, &fp,
1370 if (so->so_type != SOCK_STREAM)
1377 if (linux_msghdr.msg_controllen >= sizeof(struct l_cmsghdr)) {
1379 control = m_get(M_WAITOK, MT_CONTROL);
1380 MCLGET(control, M_WAITOK);
1381 data = mtod(control, void *);
1384 ptr_cmsg = PTRIN(linux_msghdr.msg_control);
1385 clen = linux_msghdr.msg_controllen;
1387 error = copyin(ptr_cmsg, &linux_cmsg,
1388 sizeof(struct l_cmsghdr));
1393 if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr) ||
1394 linux_cmsg.cmsg_len > clen)
1397 if (datalen + CMSG_HDRSZ > MCLBYTES)
1401 * Now we support only SCM_RIGHTS and SCM_CRED,
1402 * so return EINVAL in any other cmsg_type
1406 linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type);
1408 linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level);
1409 if (cmsg->cmsg_type == -1
1410 || cmsg->cmsg_level != SOL_SOCKET) {
1411 linux_msg(curthread,
1412 "unsupported sendmsg cmsg level %d type %d",
1413 linux_cmsg.cmsg_level, linux_cmsg.cmsg_type);
1418 * Some applications (e.g. pulseaudio) attempt to
1419 * send ancillary data even if the underlying protocol
1420 * doesn't support it which is not allowed in the
1421 * FreeBSD system call interface.
1423 if (sa_family != AF_UNIX)
1426 if (cmsg->cmsg_type == SCM_CREDS) {
1427 len = sizeof(struct cmsgcred);
1428 if (datalen + CMSG_SPACE(len) > MCLBYTES)
1432 * The lower levels will fill in the structure
1434 memset(CMSG_DATA(data), 0, len);
1436 len = linux_cmsg.cmsg_len - L_CMSG_HDRSZ;
1437 if (datalen + CMSG_SPACE(len) < datalen ||
1438 datalen + CMSG_SPACE(len) > MCLBYTES)
1441 error = copyin(LINUX_CMSG_DATA(ptr_cmsg),
1442 CMSG_DATA(data), len);
1447 cmsg->cmsg_len = CMSG_LEN(len);
1448 data = (char *)data + CMSG_SPACE(len);
1449 datalen += CMSG_SPACE(len);
1452 if (clen <= LINUX_CMSG_ALIGN(linux_cmsg.cmsg_len))
1455 clen -= LINUX_CMSG_ALIGN(linux_cmsg.cmsg_len);
1456 ptr_cmsg = (struct l_cmsghdr *)((char *)ptr_cmsg +
1457 LINUX_CMSG_ALIGN(linux_cmsg.cmsg_len));
1458 } while(clen >= sizeof(struct l_cmsghdr));
1460 control->m_len = datalen;
1469 error = linux_sendit(td, s, &msg, flags, control, UIO_USERSPACE);
1479 linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args)
1482 return (linux_sendmsg_common(td, args->s, PTRIN(args->msg),
1487 linux_sendmmsg(struct thread *td, struct linux_sendmmsg_args *args)
1489 struct l_mmsghdr *msg;
1491 int error, datagrams;
1493 if (args->vlen > UIO_MAXIOV)
1494 args->vlen = UIO_MAXIOV;
1496 msg = PTRIN(args->msg);
1498 while (datagrams < args->vlen) {
1499 error = linux_sendmsg_common(td, args->s, &msg->msg_hdr,
1504 retval = td->td_retval[0];
1505 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len));
1512 td->td_retval[0] = datagrams;
1517 linux_recvmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr,
1518 l_uint flags, struct msghdr *msg)
1521 struct cmsgcred *cmcred;
1522 struct sockcred2 *scred;
1523 struct l_cmsghdr *linux_cmsg = NULL;
1524 struct l_ucred linux_ucred;
1525 socklen_t datalen, maxlen, outlen;
1526 struct l_msghdr linux_msghdr;
1527 struct iovec *iov, *uiov;
1528 struct mbuf *control = NULL;
1529 struct mbuf **controlp;
1530 struct timeval *ftmvl;
1531 struct sockaddr *sa;
1535 int error, i, fd, fds, *fdp;
1537 error = copyin(msghdr, &linux_msghdr, sizeof(linux_msghdr));
1541 error = linux_to_bsd_msghdr(msg, &linux_msghdr);
1545 #ifdef COMPAT_LINUX32
1546 error = linux32_copyiniov(PTRIN(msg->msg_iov), msg->msg_iovlen,
1549 error = copyiniov(msg->msg_iov, msg->msg_iovlen, &iov, EMSGSIZE);
1554 if (msg->msg_name != NULL && msg->msg_namelen > 0) {
1555 msg->msg_namelen = min(msg->msg_namelen, SOCK_MAXADDRLEN);
1556 sa = malloc(msg->msg_namelen, M_SONAME, M_WAITOK);
1560 msg->msg_name = NULL;
1563 uiov = msg->msg_iov;
1565 controlp = (msg->msg_control != NULL) ? &control : NULL;
1566 error = kern_recvit(td, s, msg, UIO_SYSSPACE, controlp);
1567 msg->msg_iov = uiov;
1572 * Note that kern_recvit() updates msg->msg_namelen.
1574 if (msg->msg_name != NULL && msg->msg_namelen > 0) {
1575 msg->msg_name = PTRIN(linux_msghdr.msg_name);
1576 error = linux_copyout_sockaddr(sa,
1577 PTRIN(msg->msg_name), msg->msg_namelen);
1582 error = bsd_to_linux_msghdr(msg, &linux_msghdr);
1586 maxlen = linux_msghdr.msg_controllen;
1587 linux_msghdr.msg_controllen = 0;
1589 linux_cmsg = malloc(L_CMSG_HDRSZ, M_LINUX, M_WAITOK | M_ZERO);
1591 msg->msg_control = mtod(control, struct cmsghdr *);
1592 msg->msg_controllen = control->m_len;
1594 cm = CMSG_FIRSTHDR(msg);
1595 outbuf = PTRIN(linux_msghdr.msg_control);
1597 while (cm != NULL) {
1598 linux_cmsg->cmsg_type =
1599 bsd_to_linux_cmsg_type(cm->cmsg_type);
1600 linux_cmsg->cmsg_level =
1601 bsd_to_linux_sockopt_level(cm->cmsg_level);
1602 if (linux_cmsg->cmsg_type == -1 ||
1603 cm->cmsg_level != SOL_SOCKET) {
1604 linux_msg(curthread,
1605 "unsupported recvmsg cmsg level %d type %d",
1606 cm->cmsg_level, cm->cmsg_type);
1611 data = CMSG_DATA(cm);
1612 datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data;
1614 switch (cm->cmsg_type) {
1616 if (flags & LINUX_MSG_CMSG_CLOEXEC) {
1617 fds = datalen / sizeof(int);
1619 for (i = 0; i < fds; i++) {
1621 (void)kern_fcntl(td, fd,
1622 F_SETFD, FD_CLOEXEC);
1629 * Currently LOCAL_CREDS is never in
1630 * effect for Linux so no need to worry
1633 if (datalen != sizeof(*cmcred)) {
1637 cmcred = (struct cmsgcred *)data;
1638 bzero(&linux_ucred, sizeof(linux_ucred));
1639 linux_ucred.pid = cmcred->cmcred_pid;
1640 linux_ucred.uid = cmcred->cmcred_uid;
1641 linux_ucred.gid = cmcred->cmcred_gid;
1642 data = &linux_ucred;
1643 datalen = sizeof(linux_ucred);
1648 bzero(&linux_ucred, sizeof(linux_ucred));
1649 linux_ucred.pid = scred->sc_pid;
1650 linux_ucred.uid = scred->sc_uid;
1651 linux_ucred.gid = scred->sc_gid;
1652 data = &linux_ucred;
1653 datalen = sizeof(linux_ucred);
1657 if (datalen != sizeof(struct timeval)) {
1661 ftmvl = (struct timeval *)data;
1662 ltmvl.tv_sec = ftmvl->tv_sec;
1663 ltmvl.tv_usec = ftmvl->tv_usec;
1665 datalen = sizeof(ltmvl);
1669 if (outlen + LINUX_CMSG_LEN(datalen) > maxlen) {
1674 linux_msghdr.msg_flags |= LINUX_MSG_CTRUNC;
1675 m_dispose_extcontrolm(control);
1680 linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen);
1682 error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ);
1685 outbuf += L_CMSG_HDRSZ;
1687 error = copyout(data, outbuf, datalen);
1691 outbuf += LINUX_CMSG_ALIGN(datalen);
1692 outlen += LINUX_CMSG_LEN(datalen);
1694 cm = CMSG_NXTHDR(msg, cm);
1696 linux_msghdr.msg_controllen = outlen;
1700 error = copyout(&linux_msghdr, msghdr, sizeof(linux_msghdr));
1703 if (control != NULL) {
1705 m_dispose_extcontrolm(control);
1709 free(linux_cmsg, M_LINUX);
1716 linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args)
1718 struct msghdr bsd_msg;
1720 return (linux_recvmsg_common(td, args->s, PTRIN(args->msg),
1721 args->flags, &bsd_msg));
1725 linux_recvmmsg(struct thread *td, struct linux_recvmmsg_args *args)
1727 struct l_mmsghdr *msg;
1728 struct msghdr bsd_msg;
1729 struct l_timespec lts;
1730 struct timespec ts, tts;
1732 int error, datagrams;
1734 if (args->timeout) {
1735 error = copyin(args->timeout, <s, sizeof(struct l_timespec));
1738 error = linux_to_native_timespec(&ts, <s);
1742 timespecadd(&tts, &ts, &tts);
1745 msg = PTRIN(args->msg);
1747 while (datagrams < args->vlen) {
1748 error = linux_recvmsg_common(td, args->s, &msg->msg_hdr,
1749 args->flags & ~LINUX_MSG_WAITFORONE, &bsd_msg);
1753 retval = td->td_retval[0];
1754 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len));
1761 * MSG_WAITFORONE turns on MSG_DONTWAIT after one packet.
1763 if (args->flags & LINUX_MSG_WAITFORONE)
1764 args->flags |= LINUX_MSG_DONTWAIT;
1767 * See BUGS section of recvmmsg(2).
1769 if (args->timeout) {
1771 timespecsub(&ts, &tts, &ts);
1772 if (!timespecisset(&ts) || ts.tv_sec > 0)
1775 /* Out of band data, return right away. */
1776 if (bsd_msg.msg_flags & MSG_OOB)
1780 td->td_retval[0] = datagrams;
1785 linux_shutdown(struct thread *td, struct linux_shutdown_args *args)
1788 return (kern_shutdown(td, args->s, args->how));
1792 linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args)
1795 struct sockaddr *sa;
1798 int error, level, name;
1800 level = linux_to_bsd_sockopt_level(args->level);
1803 name = linux_to_bsd_so_sockopt(args->optname);
1805 case LOCAL_CREDS_PERSISTENT:
1811 error = copyin(PTRIN(args->optval), &linux_tv,
1815 tv.tv_sec = linux_tv.tv_sec;
1816 tv.tv_usec = linux_tv.tv_usec;
1817 return (kern_setsockopt(td, args->s, level,
1818 name, &tv, UIO_SYSSPACE, sizeof(tv)));
1825 if (args->optname == LINUX_IP_RECVERR &&
1826 linux_ignore_ip_recverr) {
1828 * XXX: This is a hack to unbreak DNS resolution
1829 * with glibc 2.30 and above.
1833 name = linux_to_bsd_ip_sockopt(args->optname);
1836 name = linux_to_bsd_ip6_sockopt(args->optname);
1839 name = linux_to_bsd_tcp_sockopt(args->optname);
1847 linux_msg(curthread,
1848 "unsupported setsockopt level %d optname %d",
1849 args->level, args->optname);
1850 return (ENOPROTOOPT);
1853 if (name == IPV6_NEXTHOP) {
1855 error = linux_to_bsd_sockaddr(PTRIN(args->optval), &sa, &len);
1859 error = kern_setsockopt(td, args->s, level,
1860 name, sa, UIO_SYSSPACE, len);
1863 error = kern_setsockopt(td, args->s, level,
1864 name, PTRIN(args->optval), UIO_USERSPACE, args->optlen);
1871 linux_getsockopt_so_peergroups(struct thread *td,
1872 struct linux_getsockopt_args *args)
1875 socklen_t xulen, len;
1879 error = kern_getsockopt(td, args->s, 0,
1880 LOCAL_PEERCRED, &xu, UIO_SYSSPACE, &xulen);
1884 len = xu.cr_ngroups * sizeof(l_gid_t);
1885 if (args->optlen < len) {
1886 error = copyout(&len, PTRIN(args->optlen), sizeof(len));
1893 * "- 1" to skip the primary group.
1895 for (i = 0; i < xu.cr_ngroups - 1; i++) {
1896 error = copyout(xu.cr_groups + i + 1,
1897 (void *)(args->optval + i * sizeof(l_gid_t)),
1903 error = copyout(&len, PTRIN(args->optlen), sizeof(len));
1908 linux_getsockopt_so_peersec(struct thread *td,
1909 struct linux_getsockopt_args *args)
1914 len = sizeof(SECURITY_CONTEXT_STRING);
1915 if (args->optlen < len) {
1916 error = copyout(&len, PTRIN(args->optlen), sizeof(len));
1922 error = copyout(SECURITY_CONTEXT_STRING,
1923 PTRIN(args->optval), sizeof(SECURITY_CONTEXT_STRING));
1925 error = copyout(&len, PTRIN(args->optlen), sizeof(len));
1930 linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args)
1934 socklen_t tv_len, xulen, len;
1935 struct sockaddr *sa;
1938 int error, level, name, newval;
1940 level = linux_to_bsd_sockopt_level(args->level);
1943 switch (args->optname) {
1944 case LINUX_SO_PEERGROUPS:
1945 return (linux_getsockopt_so_peergroups(td, args));
1946 case LINUX_SO_PEERSEC:
1947 return (linux_getsockopt_so_peersec(td, args));
1952 name = linux_to_bsd_so_sockopt(args->optname);
1954 case LOCAL_CREDS_PERSISTENT:
1960 tv_len = sizeof(tv);
1961 error = kern_getsockopt(td, args->s, level,
1962 name, &tv, UIO_SYSSPACE, &tv_len);
1965 linux_tv.tv_sec = tv.tv_sec;
1966 linux_tv.tv_usec = tv.tv_usec;
1967 return (copyout(&linux_tv, PTRIN(args->optval),
1970 case LOCAL_PEERCRED:
1971 if (args->optlen < sizeof(lxu))
1974 * LOCAL_PEERCRED is not served at the SOL_SOCKET level,
1975 * but by the Unix socket's level 0.
1979 error = kern_getsockopt(td, args->s, level,
1980 name, &xu, UIO_SYSSPACE, &xulen);
1983 lxu.pid = xu.cr_pid;
1984 lxu.uid = xu.cr_uid;
1985 lxu.gid = xu.cr_gid;
1986 return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu)));
1989 len = sizeof(newval);
1990 error = kern_getsockopt(td, args->s, level,
1991 name, &newval, UIO_SYSSPACE, &len);
1994 newval = -bsd_to_linux_errno(newval);
1995 return (copyout(&newval, PTRIN(args->optval), len));
2002 name = linux_to_bsd_ip_sockopt(args->optname);
2005 name = linux_to_bsd_ip6_sockopt(args->optname);
2008 name = linux_to_bsd_tcp_sockopt(args->optname);
2016 linux_msg(curthread,
2017 "unsupported getsockopt level %d optname %d",
2018 args->level, args->optname);
2022 if (name == IPV6_NEXTHOP) {
2023 error = copyin(PTRIN(args->optlen), &len, sizeof(len));
2026 sa = malloc(len, M_SONAME, M_WAITOK);
2028 error = kern_getsockopt(td, args->s, level,
2029 name, sa, UIO_SYSSPACE, &len);
2033 error = linux_copyout_sockaddr(sa, PTRIN(args->optval), len);
2035 error = copyout(&len, PTRIN(args->optlen),
2041 error = copyin(PTRIN(args->optlen), &len, sizeof(len));
2045 error = kern_getsockopt(td, args->s, level,
2046 name, PTRIN(args->optval), UIO_USERSPACE, &len);
2048 error = copyout(&len, PTRIN(args->optlen),
2056 linux_sendfile_common(struct thread *td, l_int out, l_int in,
2057 l_loff_t *offset, l_size_t count)
2061 l_loff_t current_offset;
2065 error = fget_read(td, in, &cap_pread_rights, &fp);
2069 if (offset != NULL) {
2070 current_offset = *offset;
2072 error = (fp->f_ops->fo_flags & DFLAG_SEEKABLE) != 0 ?
2073 fo_seek(fp, 0, SEEK_CUR, td) : ESPIPE;
2076 current_offset = td->td_uretoff.tdu_off;
2081 /* Linux cannot have 0 count. */
2082 if (count <= 0 || current_offset < 0) {
2087 error = fo_sendfile(fp, out, NULL, NULL, current_offset, count,
2088 &bytes_read, 0, td);
2091 current_offset += bytes_read;
2093 if (offset != NULL) {
2094 *offset = current_offset;
2096 error = fo_seek(fp, current_offset, SEEK_SET, td);
2101 td->td_retval[0] = (ssize_t)bytes_read;
2104 if (error == ENOTSOCK)
2110 linux_sendfile(struct thread *td, struct linux_sendfile_args *arg)
2113 * Differences between FreeBSD and Linux sendfile:
2114 * - Linux doesn't send anything when count is 0 (FreeBSD uses 0 to
2115 * mean send the whole file.) In linux_sendfile given fds are still
2116 * checked for validity when the count is 0.
2117 * - Linux can send to any fd whereas FreeBSD only supports sockets.
2118 * The same restriction follows for linux_sendfile.
2119 * - Linux doesn't have an equivalent for FreeBSD's flags and sf_hdtr.
2120 * - Linux takes an offset pointer and updates it to the read location.
2121 * FreeBSD takes in an offset and a 'bytes read' parameter which is
2122 * only filled if it isn't NULL. We use this parameter to update the
2123 * offset pointer if it exists.
2124 * - Linux sendfile returns bytes read on success while FreeBSD
2125 * returns 0. We use the 'bytes read' parameter to get this value.
2133 if (arg->offset != NULL) {
2134 error = copyin(arg->offset, &offset, sizeof(offset));
2137 offset64 = (l_loff_t)offset;
2140 ret = linux_sendfile_common(td, arg->out, arg->in,
2141 arg->offset != NULL ? &offset64 : NULL, arg->count);
2143 if (arg->offset != NULL) {
2144 #if defined(__i386__) || defined(__arm__) || \
2145 (defined(__amd64__) && defined(COMPAT_LINUX32))
2146 if (offset64 > INT32_MAX)
2149 offset = (l_long)offset64;
2150 error = copyout(&offset, arg->offset, sizeof(offset));
2158 #if defined(__i386__) || defined(__arm__) || \
2159 (defined(__amd64__) && defined(COMPAT_LINUX32))
2162 linux_sendfile64(struct thread *td, struct linux_sendfile64_args *arg)
2168 if (arg->offset != NULL) {
2169 error = copyin(arg->offset, &offset, sizeof(offset));
2174 ret = linux_sendfile_common(td, arg->out, arg->in,
2175 arg->offset != NULL ? &offset : NULL, arg->count);
2177 if (arg->offset != NULL) {
2178 error = copyout(&offset, arg->offset, sizeof(offset));
2186 /* Argument list sizes for linux_socketcall */
2187 static const unsigned char lxs_args_cnt[] = {
2188 0 /* unused*/, 3 /* socket */,
2189 3 /* bind */, 3 /* connect */,
2190 2 /* listen */, 3 /* accept */,
2191 3 /* getsockname */, 3 /* getpeername */,
2192 4 /* socketpair */, 4 /* send */,
2193 4 /* recv */, 6 /* sendto */,
2194 6 /* recvfrom */, 2 /* shutdown */,
2195 5 /* setsockopt */, 5 /* getsockopt */,
2196 3 /* sendmsg */, 3 /* recvmsg */,
2197 4 /* accept4 */, 5 /* recvmmsg */,
2198 4 /* sendmmsg */, 4 /* sendfile */
2200 #define LINUX_ARGS_CNT (nitems(lxs_args_cnt) - 1)
2201 #define LINUX_ARG_SIZE(x) (lxs_args_cnt[x] * sizeof(l_ulong))
2204 linux_socketcall(struct thread *td, struct linux_socketcall_args *args)
2207 #if defined(__amd64__) && defined(COMPAT_LINUX32)
2208 register_t l_args[6];
2213 if (args->what < LINUX_SOCKET || args->what > LINUX_ARGS_CNT)
2215 error = copyin(PTRIN(args->args), a, LINUX_ARG_SIZE(args->what));
2219 #if defined(__amd64__) && defined(COMPAT_LINUX32)
2220 for (int i = 0; i < lxs_args_cnt[args->what]; ++i)
2226 switch (args->what) {
2228 return (linux_socket(td, arg));
2230 return (linux_bind(td, arg));
2232 return (linux_connect(td, arg));
2234 return (linux_listen(td, arg));
2236 return (linux_accept(td, arg));
2237 case LINUX_GETSOCKNAME:
2238 return (linux_getsockname(td, arg));
2239 case LINUX_GETPEERNAME:
2240 return (linux_getpeername(td, arg));
2241 case LINUX_SOCKETPAIR:
2242 return (linux_socketpair(td, arg));
2244 return (linux_send(td, arg));
2246 return (linux_recv(td, arg));
2248 return (linux_sendto(td, arg));
2249 case LINUX_RECVFROM:
2250 return (linux_recvfrom(td, arg));
2251 case LINUX_SHUTDOWN:
2252 return (linux_shutdown(td, arg));
2253 case LINUX_SETSOCKOPT:
2254 return (linux_setsockopt(td, arg));
2255 case LINUX_GETSOCKOPT:
2256 return (linux_getsockopt(td, arg));
2258 return (linux_sendmsg(td, arg));
2260 return (linux_recvmsg(td, arg));
2262 return (linux_accept4(td, arg));
2263 case LINUX_RECVMMSG:
2264 return (linux_recvmmsg(td, arg));
2265 case LINUX_SENDMMSG:
2266 return (linux_sendmmsg(td, arg));
2267 case LINUX_SENDFILE:
2268 return (linux_sendfile(td, arg));
2271 linux_msg(td, "socket type %d not implemented", args->what);
2274 #endif /* __i386__ || __arm__ || (__amd64__ && COMPAT_LINUX32) */