linux_socket.c

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    1 /*-
    2  * Copyright (c) 1995 Søren Schmidt
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer
   10  *    in this position and unchanged.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 3. The name of the author may not be used to endorse or promote products
   15  *    derived from this software without specific prior written permission
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: releng/7.4/sys/compat/linux/linux_socket.c 226023 2011-10-04 19:07:38Z cperciva $");
   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/fcntl.h>
   41 #include <sys/file.h>
   42 #include <sys/limits.h>
   43 #include <sys/lock.h>
   44 #include <sys/malloc.h>
   45 #include <sys/mutex.h>
   46 #include <sys/mbuf.h>
   47 #include <sys/socket.h>
   48 #include <sys/socketvar.h>
   49 #include <sys/syscallsubr.h>
   50 #include <sys/uio.h>
   51 #include <sys/syslog.h>
   52 #include <sys/un.h>
   53 
   54 #include <netinet/in.h>
   55 #include <netinet/in_systm.h>
   56 #include <netinet/ip.h>
   57 #ifdef INET6
   58 #include <netinet/ip6.h>
   59 #include <netinet6/ip6_var.h>
   60 #endif
   61 
   62 #ifdef COMPAT_LINUX32
   63 #include <machine/../linux32/linux.h>
   64 #include <machine/../linux32/linux32_proto.h>
   65 #else
   66 #include <machine/../linux/linux.h>
   67 #include <machine/../linux/linux_proto.h>
   68 #endif
   69 #include <compat/linux/linux_socket.h>
   70 #include <compat/linux/linux_util.h>
   71 
   72 static int do_sa_get(struct sockaddr **, const struct osockaddr *, int *,
   73     struct malloc_type *);
   74 static int linux_to_bsd_domain(int);
   75 
   76 /*
   77  * Reads a linux sockaddr and does any necessary translation.
   78  * Linux sockaddrs don't have a length field, only a family.
   79  */
   80 static int
   81 linux_getsockaddr(struct sockaddr **sap, const struct osockaddr *osa, int len)
   82 {
   83         int osalen = len;
   84 
   85         return (do_sa_get(sap, osa, &osalen, M_SONAME));
   86 }
   87 
   88 /*
   89  * Copy the osockaddr structure pointed to by osa to kernel, adjust
   90  * family and convert to sockaddr.
   91  */
   92 static int
   93 do_sa_get(struct sockaddr **sap, const struct osockaddr *osa, int *osalen,
   94     struct malloc_type *mtype)
   95 {
   96         int error=0, bdom;
   97         struct sockaddr *sa;
   98         struct osockaddr *kosa;
   99         int alloclen;
  100 #ifdef INET6
  101         int oldv6size;
  102         struct sockaddr_in6 *sin6;
  103 #endif
  104         int namelen;
  105 
  106         if (*osalen < 2 || *osalen > UCHAR_MAX || !osa)
  107                 return (EINVAL);
  108 
  109         alloclen = *osalen;
  110 #ifdef INET6
  111         oldv6size = 0;
  112         /*
  113          * Check for old (pre-RFC2553) sockaddr_in6. We may accept it
  114          * if it's a v4-mapped address, so reserve the proper space
  115          * for it.
  116          */
  117         if (alloclen == sizeof (struct sockaddr_in6) - sizeof (u_int32_t)) {
  118                 alloclen = sizeof (struct sockaddr_in6);
  119                 oldv6size = 1;
  120         }
  121 #endif
  122 
  123         MALLOC(kosa, struct osockaddr *, alloclen, mtype, M_WAITOK);
  124 
  125         if ((error = copyin(osa, kosa, *osalen)))
  126                 goto out;
  127 
  128         bdom = linux_to_bsd_domain(kosa->sa_family);
  129         if (bdom == -1) {
  130                 error = EAFNOSUPPORT;
  131                 goto out;
  132         }
  133 
  134 #ifdef INET6
  135         /*
  136          * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6,
  137          * which lacks the scope id compared with RFC2553 one. If we detect
  138          * the situation, reject the address and write a message to system log.
  139          *
  140          * Still accept addresses for which the scope id is not used.
  141          */
  142         if (oldv6size && bdom == AF_INET6) {
  143                 sin6 = (struct sockaddr_in6 *)kosa;
  144                 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) ||
  145                     (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
  146                      !IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
  147                      !IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) &&
  148                      !IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
  149                      !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) {
  150                         sin6->sin6_scope_id = 0;
  151                 } else {
  152                         log(LOG_DEBUG,
  153                             "obsolete pre-RFC2553 sockaddr_in6 rejected\n");
  154                         error = EINVAL;
  155                         goto out;
  156                 }
  157         } else
  158 #endif
  159         if (bdom == AF_INET) {
  160                 alloclen = sizeof(struct sockaddr_in);
  161                 if (*osalen < alloclen) {
  162                         error = EINVAL;
  163                         goto out;
  164                 }
  165         }
  166 
  167         if ((bdom == AF_LOCAL) && (*osalen > sizeof(struct sockaddr_un))) {
  168                 for (namelen = 0;
  169                     namelen < *osalen - offsetof(struct sockaddr_un, sun_path);
  170                     namelen++)
  171                         if (!((struct sockaddr_un *)kosa)->sun_path[namelen])
  172                                 break;
  173                 if (namelen + offsetof(struct sockaddr_un, sun_path) >
  174                     sizeof(struct sockaddr_un)) {
  175                         error = EINVAL;
  176                         goto out;
  177                 }
  178                 alloclen = sizeof(struct sockaddr_un);
  179         }
  180 
  181         sa = (struct sockaddr *) kosa;
  182         sa->sa_family = bdom;
  183         sa->sa_len = alloclen;
  184 
  185         *sap = sa;
  186         *osalen = alloclen;
  187         return (0);
  188 
  189 out:
  190         FREE(kosa, mtype);
  191         return (error);
  192 }
  193 
  194 static int
  195 linux_to_bsd_domain(int domain)
  196 {
  197 
  198         switch (domain) {
  199         case LINUX_AF_UNSPEC:
  200                 return (AF_UNSPEC);
  201         case LINUX_AF_UNIX:
  202                 return (AF_LOCAL);
  203         case LINUX_AF_INET:
  204                 return (AF_INET);
  205         case LINUX_AF_INET6:
  206                 return (AF_INET6);
  207         case LINUX_AF_AX25:
  208                 return (AF_CCITT);
  209         case LINUX_AF_IPX:
  210                 return (AF_IPX);
  211         case LINUX_AF_APPLETALK:
  212                 return (AF_APPLETALK);
  213         }
  214         return (-1);
  215 }
  216 
  217 static int
  218 bsd_to_linux_domain(int domain)
  219 {
  220 
  221         switch (domain) {
  222         case AF_UNSPEC:
  223                 return (LINUX_AF_UNSPEC);
  224         case AF_LOCAL:
  225                 return (LINUX_AF_UNIX);
  226         case AF_INET:
  227                 return (LINUX_AF_INET);
  228         case AF_INET6:
  229                 return (LINUX_AF_INET6);
  230         case AF_CCITT:
  231                 return (LINUX_AF_AX25);
  232         case AF_IPX:
  233                 return (LINUX_AF_IPX);
  234         case AF_APPLETALK:
  235                 return (LINUX_AF_APPLETALK);
  236         }
  237         return (-1);
  238 }
  239 
  240 static int
  241 linux_to_bsd_sockopt_level(int level)
  242 {
  243 
  244         switch (level) {
  245         case LINUX_SOL_SOCKET:
  246                 return (SOL_SOCKET);
  247         }
  248         return (level);
  249 }
  250 
  251 static int
  252 bsd_to_linux_sockopt_level(int level)
  253 {
  254 
  255         switch (level) {
  256         case SOL_SOCKET:
  257                 return (LINUX_SOL_SOCKET);
  258         }
  259         return (level);
  260 }
  261 
  262 static int
  263 linux_to_bsd_ip_sockopt(int opt)
  264 {
  265 
  266         switch (opt) {
  267         case LINUX_IP_TOS:
  268                 return (IP_TOS);
  269         case LINUX_IP_TTL:
  270                 return (IP_TTL);
  271         case LINUX_IP_OPTIONS:
  272                 return (IP_OPTIONS);
  273         case LINUX_IP_MULTICAST_IF:
  274                 return (IP_MULTICAST_IF);
  275         case LINUX_IP_MULTICAST_TTL:
  276                 return (IP_MULTICAST_TTL);
  277         case LINUX_IP_MULTICAST_LOOP:
  278                 return (IP_MULTICAST_LOOP);
  279         case LINUX_IP_ADD_MEMBERSHIP:
  280                 return (IP_ADD_MEMBERSHIP);
  281         case LINUX_IP_DROP_MEMBERSHIP:
  282                 return (IP_DROP_MEMBERSHIP);
  283         case LINUX_IP_HDRINCL:
  284                 return (IP_HDRINCL);
  285         }
  286         return (-1);
  287 }
  288 
  289 static int
  290 linux_to_bsd_so_sockopt(int opt)
  291 {
  292 
  293         switch (opt) {
  294         case LINUX_SO_DEBUG:
  295                 return (SO_DEBUG);
  296         case LINUX_SO_REUSEADDR:
  297                 return (SO_REUSEADDR);
  298         case LINUX_SO_TYPE:
  299                 return (SO_TYPE);
  300         case LINUX_SO_ERROR:
  301                 return (SO_ERROR);
  302         case LINUX_SO_DONTROUTE:
  303                 return (SO_DONTROUTE);
  304         case LINUX_SO_BROADCAST:
  305                 return (SO_BROADCAST);
  306         case LINUX_SO_SNDBUF:
  307                 return (SO_SNDBUF);
  308         case LINUX_SO_RCVBUF:
  309                 return (SO_RCVBUF);
  310         case LINUX_SO_KEEPALIVE:
  311                 return (SO_KEEPALIVE);
  312         case LINUX_SO_OOBINLINE:
  313                 return (SO_OOBINLINE);
  314         case LINUX_SO_LINGER:
  315                 return (SO_LINGER);
  316         case LINUX_SO_PEERCRED:
  317                 return (LOCAL_PEERCRED);
  318         case LINUX_SO_RCVLOWAT:
  319                 return (SO_RCVLOWAT);
  320         case LINUX_SO_SNDLOWAT:
  321                 return (SO_SNDLOWAT);
  322         case LINUX_SO_RCVTIMEO:
  323                 return (SO_RCVTIMEO);
  324         case LINUX_SO_SNDTIMEO:
  325                 return (SO_SNDTIMEO);
  326         case LINUX_SO_TIMESTAMP:
  327                 return (SO_TIMESTAMP);
  328         case LINUX_SO_ACCEPTCONN:
  329                 return (SO_ACCEPTCONN);
  330         }
  331         return (-1);
  332 }
  333 
  334 static int
  335 linux_to_bsd_msg_flags(int flags)
  336 {
  337         int ret_flags = 0;
  338 
  339         if (flags & LINUX_MSG_OOB)
  340                 ret_flags |= MSG_OOB;
  341         if (flags & LINUX_MSG_PEEK)
  342                 ret_flags |= MSG_PEEK;
  343         if (flags & LINUX_MSG_DONTROUTE)
  344                 ret_flags |= MSG_DONTROUTE;
  345         if (flags & LINUX_MSG_CTRUNC)
  346                 ret_flags |= MSG_CTRUNC;
  347         if (flags & LINUX_MSG_TRUNC)
  348                 ret_flags |= MSG_TRUNC;
  349         if (flags & LINUX_MSG_DONTWAIT)
  350                 ret_flags |= MSG_DONTWAIT;
  351         if (flags & LINUX_MSG_EOR)
  352                 ret_flags |= MSG_EOR;
  353         if (flags & LINUX_MSG_WAITALL)
  354                 ret_flags |= MSG_WAITALL;
  355         if (flags & LINUX_MSG_NOSIGNAL)
  356                 ret_flags |= MSG_NOSIGNAL;
  357 #if 0 /* not handled */
  358         if (flags & LINUX_MSG_PROXY)
  359                 ;
  360         if (flags & LINUX_MSG_FIN)
  361                 ;
  362         if (flags & LINUX_MSG_SYN)
  363                 ;
  364         if (flags & LINUX_MSG_CONFIRM)
  365                 ;
  366         if (flags & LINUX_MSG_RST)
  367                 ;
  368         if (flags & LINUX_MSG_ERRQUEUE)
  369                 ;
  370 #endif
  371         return ret_flags;
  372 }
  373 
  374 /*
  375 * If bsd_to_linux_sockaddr() or linux_to_bsd_sockaddr() faults, then the
  376 * native syscall will fault.  Thus, we don't really need to check the
  377 * return values for these functions.
  378 */
  379 
  380 static int
  381 bsd_to_linux_sockaddr(struct sockaddr *arg)
  382 {
  383         struct sockaddr sa;
  384         size_t sa_len = sizeof(struct sockaddr);
  385         int error;
  386         
  387         if ((error = copyin(arg, &sa, sa_len)))
  388                 return (error);
  389         
  390         *(u_short *)&sa = sa.sa_family;
  391         
  392         error = copyout(&sa, arg, sa_len);
  393         
  394         return (error);
  395 }
  396 
  397 static int
  398 linux_to_bsd_sockaddr(struct sockaddr *arg, int len)
  399 {
  400         struct sockaddr sa;
  401         size_t sa_len = sizeof(struct sockaddr);
  402         int error;
  403 
  404         if ((error = copyin(arg, &sa, sa_len)))
  405                 return (error);
  406 
  407         sa.sa_family = *(sa_family_t *)&sa;
  408         sa.sa_len = len;
  409 
  410         error = copyout(&sa, arg, sa_len);
  411 
  412         return (error);
  413 }
  414 
  415 
  416 static int
  417 linux_sa_put(struct osockaddr *osa)
  418 {
  419         struct osockaddr sa;
  420         int error, bdom;
  421 
  422         /*
  423          * Only read/write the osockaddr family part, the rest is
  424          * not changed.
  425          */
  426         error = copyin(osa, &sa, sizeof(sa.sa_family));
  427         if (error)
  428                 return (error);
  429 
  430         bdom = bsd_to_linux_domain(sa.sa_family);
  431         if (bdom == -1)
  432                 return (EINVAL);
  433 
  434         sa.sa_family = bdom;
  435         error = copyout(&sa, osa, sizeof(sa.sa_family));
  436         if (error)
  437                 return (error);
  438 
  439         return (0);
  440 }
  441 
  442 static int
  443 linux_to_bsd_cmsg_type(int cmsg_type)
  444 {
  445 
  446         switch (cmsg_type) {
  447         case LINUX_SCM_RIGHTS:
  448                 return (SCM_RIGHTS);
  449         }
  450         return (-1);
  451 }
  452 
  453 static int
  454 bsd_to_linux_cmsg_type(int cmsg_type)
  455 {
  456 
  457         switch (cmsg_type) {
  458         case SCM_RIGHTS:
  459                 return (LINUX_SCM_RIGHTS);
  460         }
  461         return (-1);
  462 }
  463 
  464 
  465 
  466 static int
  467 linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr)
  468 {
  469         if (lhdr->msg_controllen > INT_MAX)
  470                 return (ENOBUFS);
  471 
  472         bhdr->msg_name          = PTRIN(lhdr->msg_name);
  473         bhdr->msg_namelen       = lhdr->msg_namelen;
  474         bhdr->msg_iov           = PTRIN(lhdr->msg_iov);
  475         bhdr->msg_iovlen        = lhdr->msg_iovlen;
  476         bhdr->msg_control       = PTRIN(lhdr->msg_control);
  477         bhdr->msg_controllen    = lhdr->msg_controllen;
  478         bhdr->msg_flags         = linux_to_bsd_msg_flags(lhdr->msg_flags);
  479         return (0);
  480 }
  481 
  482 static int
  483 bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr)
  484 {
  485         lhdr->msg_name          = PTROUT(bhdr->msg_name);
  486         lhdr->msg_namelen       = bhdr->msg_namelen;
  487         lhdr->msg_iov           = PTROUT(bhdr->msg_iov);
  488         lhdr->msg_iovlen        = bhdr->msg_iovlen;
  489         lhdr->msg_control       = PTROUT(bhdr->msg_control);
  490         lhdr->msg_controllen    = bhdr->msg_controllen;
  491         /* msg_flags skipped */
  492         return (0);
  493 }
  494 
  495 static int
  496 linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags,
  497     struct mbuf *control, enum uio_seg segflg)
  498 {
  499         struct sockaddr *to;
  500         int error;
  501 
  502         if (mp->msg_name != NULL) {
  503                 error = linux_getsockaddr(&to, mp->msg_name, mp->msg_namelen);
  504                 if (error)
  505                         return (error);
  506                 mp->msg_name = to;
  507         } else
  508                 to = NULL;
  509 
  510         error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control,
  511             segflg);
  512 
  513         if (to)
  514                 FREE(to, M_SONAME);
  515         return (error);
  516 }
  517 
  518 /* Return 0 if IP_HDRINCL is set for the given socket. */
  519 static int
  520 linux_check_hdrincl(struct thread *td, int s)
  521 {
  522         int error, optval, size_val;
  523 
  524         size_val = sizeof(optval);
  525         error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL,
  526             &optval, UIO_SYSSPACE, &size_val);
  527         if (error)
  528                 return (error);
  529 
  530         return (optval == 0);
  531 }
  532 
  533 struct linux_sendto_args {
  534         int s;
  535         l_uintptr_t msg;
  536         int len;
  537         int flags;
  538         l_uintptr_t to;
  539         int tolen;
  540 };
  541 
  542 /*
  543  * Updated sendto() when IP_HDRINCL is set:
  544  * tweak endian-dependent fields in the IP packet.
  545  */
  546 static int
  547 linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args)
  548 {
  549 /*
  550  * linux_ip_copysize defines how many bytes we should copy
  551  * from the beginning of the IP packet before we customize it for BSD.
  552  * It should include all the fields we modify (ip_len and ip_off).
  553  */
  554 #define linux_ip_copysize       8
  555 
  556         struct ip *packet;
  557         struct msghdr msg;
  558         struct iovec aiov[1];
  559         int error;
  560 
  561         /* Check that the packet isn't too big or too small. */
  562         if (linux_args->len < linux_ip_copysize ||
  563             linux_args->len > IP_MAXPACKET)
  564                 return (EINVAL);
  565 
  566         packet = (struct ip *)malloc(linux_args->len, M_TEMP, M_WAITOK);
  567 
  568         /* Make kernel copy of the packet to be sent */
  569         if ((error = copyin(PTRIN(linux_args->msg), packet,
  570             linux_args->len)))
  571                 goto goout;
  572 
  573         /* Convert fields from Linux to BSD raw IP socket format */
  574         packet->ip_len = linux_args->len;
  575         packet->ip_off = ntohs(packet->ip_off);
  576 
  577         /* Prepare the msghdr and iovec structures describing the new packet */
  578         msg.msg_name = PTRIN(linux_args->to);
  579         msg.msg_namelen = linux_args->tolen;
  580         msg.msg_iov = aiov;
  581         msg.msg_iovlen = 1;
  582         msg.msg_control = NULL;
  583         msg.msg_flags = 0;
  584         aiov[0].iov_base = (char *)packet;
  585         aiov[0].iov_len = linux_args->len;
  586         error = linux_sendit(td, linux_args->s, &msg, linux_args->flags,
  587             NULL, UIO_SYSSPACE);
  588 goout:
  589         free(packet, M_TEMP);
  590         return (error);
  591 }
  592 
  593 struct linux_socket_args {
  594         int domain;
  595         int type;
  596         int protocol;
  597 };
  598 
  599 static int
  600 linux_socket(struct thread *td, struct linux_socket_args *args)
  601 {
  602         struct socket_args /* {
  603                 int domain;
  604                 int type;
  605                 int protocol;
  606         } */ bsd_args;
  607         int retval_socket, socket_flags;
  608 
  609         bsd_args.protocol = args->protocol;
  610         socket_flags = args->type & ~LINUX_SOCK_TYPE_MASK;
  611         if (socket_flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK))
  612                 return (EINVAL);
  613         bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK;
  614         if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX)
  615                 return (EINVAL);
  616         bsd_args.domain = linux_to_bsd_domain(args->domain);
  617         if (bsd_args.domain == -1)
  618                 return (EAFNOSUPPORT);
  619 
  620         retval_socket = socket(td, &bsd_args);
  621         if (retval_socket)
  622                 return (retval_socket);
  623 
  624         if (socket_flags & LINUX_SOCK_NONBLOCK) {
  625                 retval_socket = kern_fcntl(td, td->td_retval[0],
  626                     F_SETFL, O_NONBLOCK);
  627                 if (retval_socket) {
  628                         (void)kern_close(td, td->td_retval[0]);
  629                         goto out;
  630                 }
  631         }
  632         if (socket_flags & LINUX_SOCK_CLOEXEC) {
  633                 retval_socket = kern_fcntl(td, td->td_retval[0],
  634                     F_SETFD, FD_CLOEXEC);
  635                 if (retval_socket) {
  636                         (void)kern_close(td, td->td_retval[0]);
  637                         goto out;
  638                 }
  639         }
  640 
  641         if (bsd_args.type == SOCK_RAW
  642             && (bsd_args.protocol == IPPROTO_RAW || bsd_args.protocol == 0)
  643             && bsd_args.domain == PF_INET) {
  644                 /* It's a raw IP socket: set the IP_HDRINCL option. */
  645                 int hdrincl;
  646 
  647                 hdrincl = 1;
  648                 /* We ignore any error returned by kern_setsockopt() */
  649                 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL,
  650                     &hdrincl, UIO_SYSSPACE, sizeof(hdrincl));
  651         }
  652 #ifdef INET6
  653         /*
  654          * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by
  655          * default and some apps depend on this. So, set V6ONLY to 0
  656          * for Linux apps if the sysctl value is set to 1.
  657          */
  658         if (bsd_args.domain == PF_INET6
  659 #ifndef KLD_MODULE
  660             /*
  661              * XXX: Avoid undefined symbol error with an IPv4 only
  662              * kernel.
  663              */
  664             && ip6_v6only
  665 #endif
  666             ) {
  667                 int v6only;
  668 
  669                 v6only = 0;
  670                 /* We ignore any error returned by setsockopt() */
  671                 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY,
  672                     &v6only, UIO_SYSSPACE, sizeof(v6only));
  673         }
  674 #endif
  675 
  676 out:
  677         return (retval_socket);
  678 }
  679 
  680 struct linux_bind_args {
  681         int s;
  682         l_uintptr_t name;
  683         int namelen;
  684 };
  685 
  686 static int
  687 linux_bind(struct thread *td, struct linux_bind_args *args)
  688 {
  689         struct sockaddr *sa;
  690         int error;
  691 
  692         error = linux_getsockaddr(&sa, PTRIN(args->name),
  693             args->namelen);
  694         if (error)
  695                 return (error);
  696 
  697         error = kern_bind(td, args->s, sa);
  698         free(sa, M_SONAME);
  699         if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in))
  700                 return (EINVAL);
  701         return (error);
  702 }
  703 
  704 struct linux_connect_args {
  705         int s;
  706         l_uintptr_t name;
  707         int namelen;
  708 };
  709 int linux_connect(struct thread *, struct linux_connect_args *);
  710 
  711 int
  712 linux_connect(struct thread *td, struct linux_connect_args *args)
  713 {
  714         struct socket *so;
  715         struct sockaddr *sa;
  716         u_int fflag;
  717         int error;
  718 
  719         error = linux_getsockaddr(&sa, (struct osockaddr *)PTRIN(args->name),
  720             args->namelen);
  721         if (error)
  722                 return (error);
  723 
  724         error = kern_connect(td, args->s, sa);
  725         free(sa, M_SONAME);
  726         if (error != EISCONN)
  727                 return (error);
  728 
  729         /*
  730          * Linux doesn't return EISCONN the first time it occurs,
  731          * when on a non-blocking socket. Instead it returns the
  732          * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD.
  733          *
  734          * XXXRW: Instead of using fgetsock(), check that it is a
  735          * socket and use the file descriptor reference instead of
  736          * creating a new one.
  737          */
  738         error = fgetsock(td, args->s, &so, &fflag);
  739         if (error == 0) {
  740                 error = EISCONN;
  741                 if (fflag & FNONBLOCK) {
  742                         SOCK_LOCK(so);
  743                         if (so->so_emuldata == 0)
  744                                 error = so->so_error;
  745                         so->so_emuldata = (void *)1;
  746                         SOCK_UNLOCK(so);
  747                 }
  748                 fputsock(so);
  749         }
  750         return (error);
  751 }
  752 
  753 struct linux_listen_args {
  754         int s;
  755         int backlog;
  756 };
  757 
  758 static int
  759 linux_listen(struct thread *td, struct linux_listen_args *args)
  760 {
  761         struct listen_args /* {
  762                 int s;
  763                 int backlog;
  764         } */ bsd_args;
  765 
  766         bsd_args.s = args->s;
  767         bsd_args.backlog = args->backlog;
  768         return (listen(td, &bsd_args));
  769 }
  770 
  771 struct linux_accept_args {
  772         int s;
  773         l_uintptr_t addr;
  774         l_uintptr_t namelen;
  775 };
  776 
  777 static int
  778 linux_accept(struct thread *td, struct linux_accept_args *args)
  779 {
  780         struct accept_args /* {
  781                 int     s;
  782                 struct sockaddr * __restrict name;
  783                 socklen_t * __restrict anamelen;
  784         } */ bsd_args;
  785         int error, fd;
  786 
  787         bsd_args.s = args->s;
  788         /* XXX: */
  789         bsd_args.name = (struct sockaddr * __restrict)PTRIN(args->addr);
  790         bsd_args.anamelen = PTRIN(args->namelen);/* XXX */
  791         error = accept(td, &bsd_args);
  792         bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.name);
  793         if (error) {
  794                 if (error == EFAULT && args->namelen != sizeof(struct sockaddr_in))
  795                         return (EINVAL);
  796                 return (error);
  797         }
  798         if (args->addr) {
  799                 error = linux_sa_put(PTRIN(args->addr));
  800                 if (error) {
  801                         (void)kern_close(td, td->td_retval[0]);
  802                         return (error);
  803                 }
  804         }
  805 
  806         /*
  807          * linux appears not to copy flags from the parent socket to the
  808          * accepted one, so we must clear the flags in the new descriptor.
  809          * Ignore any errors, because we already have an open fd.
  810          */
  811         fd = td->td_retval[0];
  812         (void)kern_fcntl(td, fd, F_SETFL, 0);
  813         td->td_retval[0] = fd;
  814         return (0);
  815 }
  816 
  817 struct linux_getsockname_args {
  818         int s;
  819         l_uintptr_t addr;
  820         l_uintptr_t namelen;
  821 };
  822 
  823 static int
  824 linux_getsockname(struct thread *td, struct linux_getsockname_args *args)
  825 {
  826         struct getsockname_args /* {
  827                 int     fdes;
  828                 struct sockaddr * __restrict asa;
  829                 socklen_t * __restrict alen;
  830         } */ bsd_args;
  831         int error;
  832 
  833         bsd_args.fdes = args->s;
  834         /* XXX: */
  835         bsd_args.asa = (struct sockaddr * __restrict)PTRIN(args->addr);
  836         bsd_args.alen = PTRIN(args->namelen);   /* XXX */
  837         error = getsockname(td, &bsd_args);
  838         bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa);
  839         if (error)
  840                 return (error);
  841         error = linux_sa_put(PTRIN(args->addr));
  842         if (error)
  843                 return (error);
  844         return (0);
  845 }
  846 
  847 struct linux_getpeername_args {
  848         int s;
  849         l_uintptr_t addr;
  850         l_uintptr_t namelen;
  851 };
  852 
  853 static int
  854 linux_getpeername(struct thread *td, struct linux_getpeername_args *args)
  855 {
  856         struct getpeername_args /* {
  857                 int fdes;
  858                 caddr_t asa;
  859                 int *alen;
  860         } */ bsd_args;
  861         int error;
  862 
  863         bsd_args.fdes = args->s;
  864         bsd_args.asa = (struct sockaddr *)PTRIN(args->addr);
  865         bsd_args.alen = (int *)PTRIN(args->namelen);
  866         error = getpeername(td, &bsd_args);
  867         bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa);
  868         if (error)
  869                 return (error);
  870         error = linux_sa_put(PTRIN(args->addr));
  871         if (error)
  872                 return (error);
  873         return (0);
  874 }
  875 
  876 struct linux_socketpair_args {
  877         int domain;
  878         int type;
  879         int protocol;
  880         l_uintptr_t rsv;
  881 };
  882 
  883 static int
  884 linux_socketpair(struct thread *td, struct linux_socketpair_args *args)
  885 {
  886         struct socketpair_args /* {
  887                 int domain;
  888                 int type;
  889                 int protocol;
  890                 int *rsv;
  891         } */ bsd_args;
  892 
  893         bsd_args.domain = linux_to_bsd_domain(args->domain);
  894         if (bsd_args.domain != PF_LOCAL)
  895                 return (EAFNOSUPPORT);
  896 
  897         bsd_args.type = args->type;
  898         if (args->protocol != 0 && args->protocol != PF_UNIX)
  899 
  900                 /*
  901                  * Use of PF_UNIX as protocol argument is not right,
  902                  * but Linux does it.
  903                  * Do not map PF_UNIX as its Linux value is identical
  904                  * to FreeBSD one.
  905                  */
  906                 return (EPROTONOSUPPORT);
  907         else
  908                 bsd_args.protocol = 0;
  909         bsd_args.rsv = (int *)PTRIN(args->rsv);
  910         return (socketpair(td, &bsd_args));
  911 }
  912 
  913 struct linux_send_args {
  914         int s;
  915         l_uintptr_t msg;
  916         int len;
  917         int flags;
  918 };
  919 
  920 static int
  921 linux_send(struct thread *td, struct linux_send_args *args)
  922 {
  923         struct sendto_args /* {
  924                 int s;
  925                 caddr_t buf;
  926                 int len;
  927                 int flags;
  928                 caddr_t to;
  929                 int tolen;
  930         } */ bsd_args;
  931 
  932         bsd_args.s = args->s;
  933         bsd_args.buf = (caddr_t)PTRIN(args->msg);
  934         bsd_args.len = args->len;
  935         bsd_args.flags = args->flags;
  936         bsd_args.to = NULL;
  937         bsd_args.tolen = 0;
  938         return sendto(td, &bsd_args);
  939 }
  940 
  941 struct linux_recv_args {
  942         int s;
  943         l_uintptr_t msg;
  944         int len;
  945         int flags;
  946 };
  947 
  948 static int
  949 linux_recv(struct thread *td, struct linux_recv_args *args)
  950 {
  951         struct recvfrom_args /* {
  952                 int s;
  953                 caddr_t buf;
  954                 int len;
  955                 int flags;
  956                 struct sockaddr *from;
  957                 socklen_t fromlenaddr;
  958         } */ bsd_args;
  959 
  960         bsd_args.s = args->s;
  961         bsd_args.buf = (caddr_t)PTRIN(args->msg);
  962         bsd_args.len = args->len;
  963         bsd_args.flags = linux_to_bsd_msg_flags(args->flags);
  964         bsd_args.from = NULL;
  965         bsd_args.fromlenaddr = 0;
  966         return (recvfrom(td, &bsd_args));
  967 }
  968 
  969 static int
  970 linux_sendto(struct thread *td, struct linux_sendto_args *args)
  971 {
  972         struct msghdr msg;
  973         struct iovec aiov;
  974         int error;
  975 
  976         if (linux_check_hdrincl(td, args->s) == 0)
  977                 /* IP_HDRINCL set, tweak the packet before sending */
  978                 return (linux_sendto_hdrincl(td, args));
  979 
  980         msg.msg_name = PTRIN(args->to);
  981         msg.msg_namelen = args->tolen;
  982         msg.msg_iov = &aiov;
  983         msg.msg_iovlen = 1;
  984         msg.msg_control = NULL;
  985         msg.msg_flags = 0;
  986         aiov.iov_base = PTRIN(args->msg);
  987         aiov.iov_len = args->len;
  988         error = linux_sendit(td, args->s, &msg, args->flags, NULL,
  989             UIO_USERSPACE);
  990         return (error);
  991 }
  992 
  993 struct linux_recvfrom_args {
  994         int s;
  995         l_uintptr_t buf;
  996         int len;
  997         int flags;
  998         l_uintptr_t from;
  999         l_uintptr_t fromlen;
 1000 };
 1001 
 1002 static int
 1003 linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args)
 1004 {
 1005         struct recvfrom_args /* {
 1006                 int     s;
 1007                 caddr_t buf;
 1008                 size_t  len;
 1009                 int     flags;
 1010                 struct sockaddr * __restrict from;
 1011                 socklen_t * __restrict fromlenaddr;
 1012         } */ bsd_args;
 1013         size_t len;
 1014         int error;
 1015 
 1016         if ((error = copyin(PTRIN(args->fromlen), &len, sizeof(size_t))))
 1017                 return (error);
 1018 
 1019         bsd_args.s = args->s;
 1020         bsd_args.buf = PTRIN(args->buf);
 1021         bsd_args.len = args->len;
 1022         bsd_args.flags = linux_to_bsd_msg_flags(args->flags);
 1023         /* XXX: */
 1024         bsd_args.from = (struct sockaddr * __restrict)PTRIN(args->from);
 1025         bsd_args.fromlenaddr = PTRIN(args->fromlen);/* XXX */
 1026         
 1027         linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.from, len);
 1028         error = recvfrom(td, &bsd_args);
 1029         bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.from);
 1030         
 1031         if (error)
 1032                 return (error);
 1033         if (args->from) {
 1034                 error = linux_sa_put((struct osockaddr *)
 1035                     PTRIN(args->from));
 1036                 if (error)
 1037                         return (error);
 1038         }
 1039         return (0);
 1040 }
 1041 
 1042 struct linux_sendmsg_args {
 1043         int s;
 1044         l_uintptr_t msg;
 1045         int flags;
 1046 };
 1047 
 1048 static int
 1049 linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args)
 1050 {
 1051         struct cmsghdr *cmsg;
 1052         struct mbuf *control;
 1053         struct msghdr msg;
 1054         struct l_cmsghdr linux_cmsg;
 1055         struct l_cmsghdr *ptr_cmsg;
 1056         struct l_msghdr linux_msg;
 1057         struct iovec *iov;
 1058         socklen_t datalen;
 1059         void *data;
 1060         int error;
 1061 
 1062         error = copyin(PTRIN(args->msg), &linux_msg, sizeof(linux_msg));
 1063         if (error)
 1064                 return (error);
 1065         error = linux_to_bsd_msghdr(&msg, &linux_msg);
 1066         if (error)
 1067                 return (error);
 1068 
 1069         /*
 1070          * Some Linux applications (ping) define a non-NULL control data
 1071          * pointer, but a msg_controllen of 0, which is not allowed in the
 1072          * FreeBSD system call interface.  NULL the msg_control pointer in
 1073          * order to handle this case.  This should be checked, but allows the
 1074          * Linux ping to work.
 1075          */
 1076         if (msg.msg_control != NULL && msg.msg_controllen == 0)
 1077                 msg.msg_control = NULL;
 1078 
 1079 #ifdef COMPAT_LINUX32
 1080         error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen,
 1081             &iov, EMSGSIZE);
 1082 #else
 1083         error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
 1084 #endif
 1085         if (error)
 1086                 return (error);
 1087 
 1088         if (msg.msg_control != NULL) {
 1089                 error = ENOBUFS;
 1090                 cmsg = malloc(CMSG_HDRSZ, M_TEMP, M_WAITOK | M_ZERO);
 1091                 control = m_get(M_WAIT, MT_CONTROL);
 1092                 if (control == NULL)
 1093                         goto bad;
 1094                 ptr_cmsg = LINUX_CMSG_FIRSTHDR(&msg);
 1095 
 1096                 do {
 1097                         error = copyin(ptr_cmsg, &linux_cmsg,
 1098                             sizeof(struct l_cmsghdr));
 1099                         if (error)
 1100                                 goto bad;
 1101 
 1102                         error = EINVAL;
 1103                         if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr))
 1104                                 goto bad;
 1105 
 1106                         /*
 1107                          * Now we support only SCM_RIGHTS, so return EINVAL
 1108                          * in any other cmsg_type
 1109                          */
 1110                         if ((cmsg->cmsg_type =
 1111                             linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type)) == -1)
 1112                                 goto bad;
 1113                         cmsg->cmsg_level =
 1114                             linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level);
 1115 
 1116                         datalen = linux_cmsg.cmsg_len - L_CMSG_HDRSZ;
 1117                         cmsg->cmsg_len = CMSG_LEN(datalen);
 1118                         data = LINUX_CMSG_DATA(ptr_cmsg);
 1119 
 1120                         error = ENOBUFS;
 1121                         if (!m_append(control, CMSG_HDRSZ, (c_caddr_t) cmsg))
 1122                                 goto bad;
 1123                         if (!m_append(control, datalen, (c_caddr_t) data))
 1124                                 goto bad;
 1125                 } while ((ptr_cmsg = LINUX_CMSG_NXTHDR(&msg, ptr_cmsg)));
 1126         } else {
 1127                 control = NULL;
 1128                 cmsg = NULL;
 1129         }
 1130 
 1131         msg.msg_iov = iov;
 1132         msg.msg_flags = 0;
 1133         error = linux_sendit(td, args->s, &msg, args->flags, control,
 1134             UIO_USERSPACE);
 1135 
 1136 bad:
 1137         free(iov, M_IOV);
 1138         if (cmsg)
 1139                 free(cmsg, M_TEMP);
 1140         return (error);
 1141 }
 1142 
 1143 struct linux_recvmsg_args {
 1144         int s;
 1145         l_uintptr_t msg;
 1146         int flags;
 1147 };
 1148 
 1149 static int
 1150 linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args)
 1151 {
 1152         struct cmsghdr *cm;
 1153         struct msghdr msg;
 1154         struct l_cmsghdr *linux_cmsg = NULL;
 1155         socklen_t datalen, outlen, clen;
 1156         struct l_msghdr linux_msg;
 1157         struct iovec *iov, *uiov;
 1158         struct mbuf *control = NULL;
 1159         struct mbuf **controlp;
 1160         caddr_t outbuf;
 1161         void *data;
 1162         int error, i, fd, fds, *fdp;
 1163 
 1164         error = copyin(PTRIN(args->msg), &linux_msg, sizeof(linux_msg));
 1165         if (error)
 1166                 return (error);
 1167 
 1168         error = linux_to_bsd_msghdr(&msg, &linux_msg);
 1169         if (error)
 1170                 return (error);
 1171 
 1172 #ifdef COMPAT_LINUX32
 1173         error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen,
 1174             &iov, EMSGSIZE);
 1175 #else
 1176         error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
 1177 #endif
 1178         if (error)
 1179                 return (error);
 1180 
 1181         if (msg.msg_name) {
 1182                 error = linux_to_bsd_sockaddr((struct sockaddr *)msg.msg_name,
 1183                     msg.msg_namelen);
 1184                 if (error)
 1185                         goto bad;
 1186         }
 1187 
 1188         uiov = msg.msg_iov;
 1189         msg.msg_iov = iov;
 1190         controlp = (msg.msg_control != NULL) ? &control : NULL;
 1191         error = kern_recvit(td, args->s, &msg, UIO_USERSPACE, controlp);
 1192         msg.msg_iov = uiov;
 1193         if (error)
 1194                 goto bad;
 1195 
 1196         error = bsd_to_linux_msghdr(&msg, &linux_msg);
 1197         if (error)
 1198                 goto bad;
 1199 
 1200         if (linux_msg.msg_name) {
 1201                 error = bsd_to_linux_sockaddr((struct sockaddr *)
 1202                     PTRIN(linux_msg.msg_name));
 1203                 if (error)
 1204                         goto bad;
 1205         }
 1206         if (linux_msg.msg_name && linux_msg.msg_namelen > 2) {
 1207                 error = linux_sa_put(PTRIN(linux_msg.msg_name));
 1208                 if (error)
 1209                         goto bad;
 1210         }
 1211 
 1212         if (control) {
 1213 
 1214                 linux_cmsg = malloc(L_CMSG_HDRSZ, M_TEMP, M_WAITOK | M_ZERO);
 1215                 outbuf = PTRIN(linux_msg.msg_control);
 1216                 cm = mtod(control, struct cmsghdr *);
 1217                 outlen = 0;
 1218                 clen = control->m_len;
 1219 
 1220                 while (cm != NULL) {
 1221 
 1222                         if ((linux_cmsg->cmsg_type =
 1223                             bsd_to_linux_cmsg_type(cm->cmsg_type)) == -1)
 1224                         {
 1225                                 error = EINVAL;
 1226                                 goto bad;
 1227                         }
 1228                         data = CMSG_DATA(cm);
 1229                         datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data;
 1230 
 1231                         switch (linux_cmsg->cmsg_type)
 1232                         {
 1233                         case LINUX_SCM_RIGHTS:
 1234                                 if (outlen + LINUX_CMSG_LEN(datalen) >
 1235                                     linux_msg.msg_controllen) {
 1236                                         if (outlen == 0) {
 1237                                                 error = EMSGSIZE;
 1238                                                 goto bad;
 1239                                         } else {
 1240                                                 linux_msg.msg_flags |=
 1241                                                     LINUX_MSG_CTRUNC;
 1242                                                 goto out;
 1243                                         }
 1244                                 }
 1245                                 if (args->flags & LINUX_MSG_CMSG_CLOEXEC) {
 1246                                         fds = datalen / sizeof(int);
 1247                                         fdp = data;
 1248                                         for (i = 0; i < fds; i++) {
 1249                                                 fd = *fdp++;
 1250                                                 (void)kern_fcntl(td, fd,
 1251                                                     F_SETFD, FD_CLOEXEC);
 1252                                         }
 1253                                 }
 1254                                 break;
 1255                         }
 1256 
 1257                         linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen);
 1258                         linux_cmsg->cmsg_level =
 1259                             bsd_to_linux_sockopt_level(cm->cmsg_level);
 1260 
 1261                         error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ);
 1262                         if (error)
 1263                                 goto bad;
 1264                         outbuf += L_CMSG_HDRSZ;
 1265 
 1266                         error = copyout(data, outbuf, datalen);
 1267                         if (error)
 1268                                 goto bad;
 1269 
 1270                         outbuf += LINUX_CMSG_ALIGN(datalen);
 1271                         outlen += LINUX_CMSG_LEN(datalen);
 1272                         linux_msg.msg_controllen = outlen;
 1273 
 1274                         if (CMSG_SPACE(datalen) < clen) {
 1275                                 clen -= CMSG_SPACE(datalen);
 1276                                 cm = (struct cmsghdr *)
 1277                                     ((caddr_t)cm + CMSG_SPACE(datalen));
 1278                         } else
 1279                                 cm = NULL;
 1280                 }
 1281         }
 1282 
 1283 out:
 1284         error = copyout(&linux_msg, PTRIN(args->msg), sizeof(linux_msg));
 1285 
 1286 bad:
 1287         free(iov, M_IOV);
 1288         if (control != NULL)
 1289                 m_freem(control);
 1290         if (linux_cmsg != NULL)
 1291                 free(linux_cmsg, M_TEMP);
 1292 
 1293         return (error);
 1294 }
 1295 
 1296 struct linux_shutdown_args {
 1297         int s;
 1298         int how;
 1299 };
 1300 
 1301 static int
 1302 linux_shutdown(struct thread *td, struct linux_shutdown_args *args)
 1303 {
 1304         struct shutdown_args /* {
 1305                 int s;
 1306                 int how;
 1307         } */ bsd_args;
 1308 
 1309         bsd_args.s = args->s;
 1310         bsd_args.how = args->how;
 1311         return (shutdown(td, &bsd_args));
 1312 }
 1313 
 1314 struct linux_setsockopt_args {
 1315         int s;
 1316         int level;
 1317         int optname;
 1318         l_uintptr_t optval;
 1319         int optlen;
 1320 };
 1321 
 1322 static int
 1323 linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args)
 1324 {
 1325         struct setsockopt_args /* {
 1326                 int s;
 1327                 int level;
 1328                 int name;
 1329                 caddr_t val;
 1330                 int valsize;
 1331         } */ bsd_args;
 1332         l_timeval linux_tv;
 1333         struct timeval tv;
 1334         int error, name;
 1335 
 1336         bsd_args.s = args->s;
 1337         bsd_args.level = linux_to_bsd_sockopt_level(args->level);
 1338         switch (bsd_args.level) {
 1339         case SOL_SOCKET:
 1340                 name = linux_to_bsd_so_sockopt(args->optname);
 1341                 switch (name) {
 1342                 case SO_RCVTIMEO:
 1343                         /* FALLTHROUGH */
 1344                 case SO_SNDTIMEO:
 1345                         error = copyin(PTRIN(args->optval), &linux_tv,
 1346                             sizeof(linux_tv));
 1347                         if (error)
 1348                                 return (error);
 1349                         tv.tv_sec = linux_tv.tv_sec;
 1350                         tv.tv_usec = linux_tv.tv_usec;
 1351                         return (kern_setsockopt(td, args->s, bsd_args.level,
 1352                             name, &tv, UIO_SYSSPACE, sizeof(tv)));
 1353                         /* NOTREACHED */
 1354                         break;
 1355                 default:
 1356                         break;
 1357                 }
 1358                 break;
 1359         case IPPROTO_IP:
 1360                 name = linux_to_bsd_ip_sockopt(args->optname);
 1361                 break;
 1362         case IPPROTO_TCP:
 1363                 /* Linux TCP option values match BSD's */
 1364                 name = args->optname;
 1365                 break;
 1366         default:
 1367                 name = -1;
 1368                 break;
 1369         }
 1370         if (name == -1)
 1371                 return (ENOPROTOOPT);
 1372 
 1373         bsd_args.name = name;
 1374         bsd_args.val = PTRIN(args->optval);
 1375         bsd_args.valsize = args->optlen;
 1376 
 1377         if (name == IPV6_NEXTHOP) {
 1378                 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val,
 1379                         bsd_args.valsize);
 1380                 error = setsockopt(td, &bsd_args);
 1381                 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val);
 1382         } else
 1383                 error = setsockopt(td, &bsd_args);
 1384 
 1385         return (error);
 1386 }
 1387 
 1388 struct linux_getsockopt_args {
 1389         int s;
 1390         int level;
 1391         int optname;
 1392         l_uintptr_t optval;
 1393         l_uintptr_t optlen;
 1394 };
 1395 
 1396 static int
 1397 linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args)
 1398 {
 1399         struct getsockopt_args /* {
 1400                 int s;
 1401                 int level;
 1402                 int name;
 1403                 caddr_t val;
 1404                 int *avalsize;
 1405         } */ bsd_args;
 1406         l_timeval linux_tv;
 1407         struct timeval tv;
 1408         socklen_t tv_len, xulen;
 1409         struct xucred xu;
 1410         struct l_ucred lxu;
 1411         int error, name;
 1412 
 1413         bsd_args.s = args->s;
 1414         bsd_args.level = linux_to_bsd_sockopt_level(args->level);
 1415         switch (bsd_args.level) {
 1416         case SOL_SOCKET:
 1417                 name = linux_to_bsd_so_sockopt(args->optname);
 1418                 switch (name) {
 1419                 case SO_RCVTIMEO:
 1420                         /* FALLTHROUGH */
 1421                 case SO_SNDTIMEO:
 1422                         tv_len = sizeof(tv);
 1423                         error = kern_getsockopt(td, args->s, bsd_args.level,
 1424                             name, &tv, UIO_SYSSPACE, &tv_len);
 1425                         if (error)
 1426                                 return (error);
 1427                         linux_tv.tv_sec = tv.tv_sec;
 1428                         linux_tv.tv_usec = tv.tv_usec;
 1429                         return (copyout(&linux_tv, PTRIN(args->optval),
 1430                             sizeof(linux_tv)));
 1431                         /* NOTREACHED */
 1432                         break;
 1433                 case LOCAL_PEERCRED:
 1434                         if (args->optlen != sizeof(lxu))
 1435                                 return (EINVAL);
 1436                         xulen = sizeof(xu);
 1437                         error = kern_getsockopt(td, args->s, bsd_args.level,
 1438                             name, &xu, UIO_SYSSPACE, &xulen);
 1439                         if (error)
 1440                                 return (error);
 1441                         /*
 1442                          * XXX Use 0 for pid as the FreeBSD does not cache peer pid.
 1443                          */
 1444                         lxu.pid = 0;
 1445                         lxu.uid = xu.cr_uid;
 1446                         lxu.gid = xu.cr_gid;
 1447                         return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu)));
 1448                         /* NOTREACHED */
 1449                         break;
 1450                 default:
 1451                         break;
 1452                 }
 1453                 break;
 1454         case IPPROTO_IP:
 1455                 name = linux_to_bsd_ip_sockopt(args->optname);
 1456                 break;
 1457         case IPPROTO_TCP:
 1458                 /* Linux TCP option values match BSD's */
 1459                 name = args->optname;
 1460                 break;
 1461         default:
 1462                 name = -1;
 1463                 break;
 1464         }
 1465         if (name == -1)
 1466                 return (EINVAL);
 1467 
 1468         bsd_args.name = name;
 1469         bsd_args.val = PTRIN(args->optval);
 1470         bsd_args.avalsize = PTRIN(args->optlen);
 1471 
 1472         if (name == IPV6_NEXTHOP) {
 1473                 error = getsockopt(td, &bsd_args);
 1474                 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val);
 1475         } else
 1476                 error = getsockopt(td, &bsd_args);
 1477 
 1478         return (error);
 1479 }
 1480 
 1481 /* Argument list sizes for linux_socketcall */
 1482 
 1483 #define LINUX_AL(x) ((x) * sizeof(l_ulong))
 1484 
 1485 static const unsigned char lxs_args[] = {
 1486         LINUX_AL(0) /* unused*/,        LINUX_AL(3) /* socket */,
 1487         LINUX_AL(3) /* bind */,         LINUX_AL(3) /* connect */,
 1488         LINUX_AL(2) /* listen */,       LINUX_AL(3) /* accept */,
 1489         LINUX_AL(3) /* getsockname */,  LINUX_AL(3) /* getpeername */,
 1490         LINUX_AL(4) /* socketpair */,   LINUX_AL(4) /* send */,
 1491         LINUX_AL(4) /* recv */,         LINUX_AL(6) /* sendto */,
 1492         LINUX_AL(6) /* recvfrom */,     LINUX_AL(2) /* shutdown */,
 1493         LINUX_AL(5) /* setsockopt */,   LINUX_AL(5) /* getsockopt */,
 1494         LINUX_AL(3) /* sendmsg */,      LINUX_AL(3) /* recvmsg */
 1495 };
 1496 
 1497 #define LINUX_AL_SIZE   sizeof(lxs_args) / sizeof(lxs_args[0]) - 1
 1498 
 1499 int
 1500 linux_socketcall(struct thread *td, struct linux_socketcall_args *args)
 1501 {
 1502         l_ulong a[6];
 1503         void *arg;
 1504         int error;
 1505 
 1506         if (args->what < LINUX_SOCKET || args->what > LINUX_AL_SIZE)
 1507                 return (EINVAL);
 1508         error = copyin(PTRIN(args->args), a, lxs_args[args->what]);
 1509         if (error)
 1510                 return (error);
 1511 
 1512         arg = a;
 1513         switch (args->what) {
 1514         case LINUX_SOCKET:
 1515                 return (linux_socket(td, arg));
 1516         case LINUX_BIND:
 1517                 return (linux_bind(td, arg));
 1518         case LINUX_CONNECT:
 1519                 return (linux_connect(td, arg));
 1520         case LINUX_LISTEN:
 1521                 return (linux_listen(td, arg));
 1522         case LINUX_ACCEPT:
 1523                 return (linux_accept(td, arg));
 1524         case LINUX_GETSOCKNAME:
 1525                 return (linux_getsockname(td, arg));
 1526         case LINUX_GETPEERNAME:
 1527                 return (linux_getpeername(td, arg));
 1528         case LINUX_SOCKETPAIR:
 1529                 return (linux_socketpair(td, arg));
 1530         case LINUX_SEND:
 1531                 return (linux_send(td, arg));
 1532         case LINUX_RECV:
 1533                 return (linux_recv(td, arg));
 1534         case LINUX_SENDTO:
 1535                 return (linux_sendto(td, arg));
 1536         case LINUX_RECVFROM:
 1537                 return (linux_recvfrom(td, arg));
 1538         case LINUX_SHUTDOWN:
 1539                 return (linux_shutdown(td, arg));
 1540         case LINUX_SETSOCKOPT:
 1541                 return (linux_setsockopt(td, arg));
 1542         case LINUX_GETSOCKOPT:
 1543                 return (linux_getsockopt(td, arg));
 1544         case LINUX_SENDMSG:
 1545                 return (linux_sendmsg(td, arg));
 1546         case LINUX_RECVMSG:
 1547                 return (linux_recvmsg(td, arg));
 1548         }
 1549 
 1550         uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what);
 1551         return (ENOSYS);
 1552 }
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FreeBSD/Linux Kernel Cross Reference sys/compat/linux/linux_socket.c

FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/linux_socket.c
