The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/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("$FreeBSD$");
   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         case LINUX_SCM_CREDENTIALS:
  450                 return (SCM_CREDS);
  451         }
  452         return (-1);
  453 }
  454 
  455 static int
  456 bsd_to_linux_cmsg_type(int cmsg_type)
  457 {
  458 
  459         switch (cmsg_type) {
  460         case SCM_RIGHTS:
  461                 return (LINUX_SCM_RIGHTS);
  462         case SCM_CREDS:
  463                 return (LINUX_SCM_CREDENTIALS);
  464         }
  465         return (-1);
  466 }
  467 
  468 
  469 
  470 static int
  471 linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr)
  472 {
  473         if (lhdr->msg_controllen > INT_MAX)
  474                 return (ENOBUFS);
  475 
  476         bhdr->msg_name          = PTRIN(lhdr->msg_name);
  477         bhdr->msg_namelen       = lhdr->msg_namelen;
  478         bhdr->msg_iov           = PTRIN(lhdr->msg_iov);
  479         bhdr->msg_iovlen        = lhdr->msg_iovlen;
  480         bhdr->msg_control       = PTRIN(lhdr->msg_control);
  481 
  482         /*
  483          * msg_controllen is skipped since BSD and LINUX control messages
  484          * are potentially different sizes (e.g. the cred structure used
  485          * by SCM_CREDS is different between the two operating system).
  486          *
  487          * The caller can set it (if necessary) after converting all the
  488          * control messages.
  489          */
  490 
  491         bhdr->msg_flags         = linux_to_bsd_msg_flags(lhdr->msg_flags);
  492         return (0);
  493 }
  494 
  495 static int
  496 bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr)
  497 {
  498         lhdr->msg_name          = PTROUT(bhdr->msg_name);
  499         lhdr->msg_namelen       = bhdr->msg_namelen;
  500         lhdr->msg_iov           = PTROUT(bhdr->msg_iov);
  501         lhdr->msg_iovlen        = bhdr->msg_iovlen;
  502         lhdr->msg_control       = PTROUT(bhdr->msg_control);
  503 
  504         /*
  505          * msg_controllen is skipped since BSD and LINUX control messages
  506          * are potentially different sizes (e.g. the cred structure used
  507          * by SCM_CREDS is different between the two operating system).
  508          *
  509          * The caller can set it (if necessary) after converting all the
  510          * control messages.
  511          */
  512 
  513         /* msg_flags skipped */
  514         return (0);
  515 }
  516 
  517 static int
  518 linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags,
  519     struct mbuf *control, enum uio_seg segflg)
  520 {
  521         struct sockaddr *to;
  522         int error;
  523 
  524         if (mp->msg_name != NULL) {
  525                 error = linux_getsockaddr(&to, mp->msg_name, mp->msg_namelen);
  526                 if (error)
  527                         return (error);
  528                 mp->msg_name = to;
  529         } else
  530                 to = NULL;
  531 
  532         error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control,
  533             segflg);
  534 
  535         if (to)
  536                 FREE(to, M_SONAME);
  537         return (error);
  538 }
  539 
  540 /* Return 0 if IP_HDRINCL is set for the given socket. */
  541 static int
  542 linux_check_hdrincl(struct thread *td, int s)
  543 {
  544         int error, optval, size_val;
  545 
  546         size_val = sizeof(optval);
  547         error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL,
  548             &optval, UIO_SYSSPACE, &size_val);
  549         if (error)
  550                 return (error);
  551 
  552         return (optval == 0);
  553 }
  554 
  555 struct linux_sendto_args {
  556         int s;
  557         l_uintptr_t msg;
  558         int len;
  559         int flags;
  560         l_uintptr_t to;
  561         int tolen;
  562 };
  563 
  564 /*
  565  * Updated sendto() when IP_HDRINCL is set:
  566  * tweak endian-dependent fields in the IP packet.
  567  */
  568 static int
  569 linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args)
  570 {
  571 /*
  572  * linux_ip_copysize defines how many bytes we should copy
  573  * from the beginning of the IP packet before we customize it for BSD.
  574  * It should include all the fields we modify (ip_len and ip_off).
  575  */
  576 #define linux_ip_copysize       8
  577 
  578         struct ip *packet;
  579         struct msghdr msg;
  580         struct iovec aiov[1];
  581         int error;
  582 
  583         /* Check that the packet isn't too big or too small. */
  584         if (linux_args->len < linux_ip_copysize ||
  585             linux_args->len > IP_MAXPACKET)
  586                 return (EINVAL);
  587 
  588         packet = (struct ip *)malloc(linux_args->len, M_TEMP, M_WAITOK);
  589 
  590         /* Make kernel copy of the packet to be sent */
  591         if ((error = copyin(PTRIN(linux_args->msg), packet,
  592             linux_args->len)))
  593                 goto goout;
  594 
  595         /* Convert fields from Linux to BSD raw IP socket format */
  596         packet->ip_len = linux_args->len;
  597         packet->ip_off = ntohs(packet->ip_off);
  598 
  599         /* Prepare the msghdr and iovec structures describing the new packet */
  600         msg.msg_name = PTRIN(linux_args->to);
  601         msg.msg_namelen = linux_args->tolen;
  602         msg.msg_iov = aiov;
  603         msg.msg_iovlen = 1;
  604         msg.msg_control = NULL;
  605         msg.msg_flags = 0;
  606         aiov[0].iov_base = (char *)packet;
  607         aiov[0].iov_len = linux_args->len;
  608         error = linux_sendit(td, linux_args->s, &msg, linux_args->flags,
  609             NULL, UIO_SYSSPACE);
  610 goout:
  611         free(packet, M_TEMP);
  612         return (error);
  613 }
  614 
  615 struct linux_socket_args {
  616         int domain;
  617         int type;
  618         int protocol;
  619 };
  620 
  621 static int
  622 linux_socket(struct thread *td, struct linux_socket_args *args)
  623 {
  624         struct socket_args /* {
  625                 int domain;
  626                 int type;
  627                 int protocol;
  628         } */ bsd_args;
  629         int retval_socket, socket_flags;
  630 
  631         bsd_args.protocol = args->protocol;
  632         socket_flags = args->type & ~LINUX_SOCK_TYPE_MASK;
  633         if (socket_flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK))
  634                 return (EINVAL);
  635         bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK;
  636         if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX)
  637                 return (EINVAL);
  638         bsd_args.domain = linux_to_bsd_domain(args->domain);
  639         if (bsd_args.domain == -1)
  640                 return (EAFNOSUPPORT);
  641 
  642         retval_socket = socket(td, &bsd_args);
  643         if (retval_socket)
  644                 return (retval_socket);
  645 
  646         if (socket_flags & LINUX_SOCK_NONBLOCK) {
  647                 retval_socket = kern_fcntl(td, td->td_retval[0],
  648                     F_SETFL, O_NONBLOCK);
  649                 if (retval_socket) {
  650                         (void)kern_close(td, td->td_retval[0]);
  651                         goto out;
  652                 }
  653         }
  654         if (socket_flags & LINUX_SOCK_CLOEXEC) {
  655                 retval_socket = kern_fcntl(td, td->td_retval[0],
  656                     F_SETFD, FD_CLOEXEC);
  657                 if (retval_socket) {
  658                         (void)kern_close(td, td->td_retval[0]);
  659                         goto out;
  660                 }
  661         }
  662 
  663         if (bsd_args.type == SOCK_RAW
  664             && (bsd_args.protocol == IPPROTO_RAW || bsd_args.protocol == 0)
  665             && bsd_args.domain == PF_INET) {
  666                 /* It's a raw IP socket: set the IP_HDRINCL option. */
  667                 int hdrincl;
  668 
  669                 hdrincl = 1;
  670                 /* We ignore any error returned by kern_setsockopt() */
  671                 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL,
  672                     &hdrincl, UIO_SYSSPACE, sizeof(hdrincl));
  673         }
  674 #ifdef INET6
  675         /*
  676          * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by
  677          * default and some apps depend on this. So, set V6ONLY to 0
  678          * for Linux apps if the sysctl value is set to 1.
  679          */
  680         if (bsd_args.domain == PF_INET6
  681 #ifndef KLD_MODULE
  682             /*
  683              * XXX: Avoid undefined symbol error with an IPv4 only
  684              * kernel.
  685              */
  686             && ip6_v6only
  687 #endif
  688             ) {
  689                 int v6only;
  690 
  691                 v6only = 0;
  692                 /* We ignore any error returned by setsockopt() */
  693                 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY,
  694                     &v6only, UIO_SYSSPACE, sizeof(v6only));
  695         }
  696 #endif
  697 
  698 out:
  699         return (retval_socket);
  700 }
  701 
  702 struct linux_bind_args {
  703         int s;
  704         l_uintptr_t name;
  705         int namelen;
  706 };
  707 
  708 static int
  709 linux_bind(struct thread *td, struct linux_bind_args *args)
  710 {
  711         struct sockaddr *sa;
  712         int error;
  713 
  714         error = linux_getsockaddr(&sa, PTRIN(args->name),
  715             args->namelen);
  716         if (error)
  717                 return (error);
  718 
  719         error = kern_bind(td, args->s, sa);
  720         free(sa, M_SONAME);
  721         if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in))
  722                 return (EINVAL);
  723         return (error);
  724 }
  725 
  726 struct linux_connect_args {
  727         int s;
  728         l_uintptr_t name;
  729         int namelen;
  730 };
  731 int linux_connect(struct thread *, struct linux_connect_args *);
  732 
  733 int
  734 linux_connect(struct thread *td, struct linux_connect_args *args)
  735 {
  736         struct socket *so;
  737         struct sockaddr *sa;
  738         u_int fflag;
  739         int error;
  740 
  741         error = linux_getsockaddr(&sa, (struct osockaddr *)PTRIN(args->name),
  742             args->namelen);
  743         if (error)
  744                 return (error);
  745 
  746         error = kern_connect(td, args->s, sa);
  747         free(sa, M_SONAME);
  748         if (error != EISCONN)
  749                 return (error);
  750 
  751         /*
  752          * Linux doesn't return EISCONN the first time it occurs,
  753          * when on a non-blocking socket. Instead it returns the
  754          * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD.
  755          *
  756          * XXXRW: Instead of using fgetsock(), check that it is a
  757          * socket and use the file descriptor reference instead of
  758          * creating a new one.
  759          */
  760         error = fgetsock(td, args->s, &so, &fflag);
  761         if (error == 0) {
  762                 error = EISCONN;
  763                 if (fflag & FNONBLOCK) {
  764                         SOCK_LOCK(so);
  765                         if (so->so_emuldata == 0)
  766                                 error = so->so_error;
  767                         so->so_emuldata = (void *)1;
  768                         SOCK_UNLOCK(so);
  769                 }
  770                 fputsock(so);
  771         }
  772         return (error);
  773 }
  774 
  775 struct linux_listen_args {
  776         int s;
  777         int backlog;
  778 };
  779 
  780 static int
  781 linux_listen(struct thread *td, struct linux_listen_args *args)
  782 {
  783         struct listen_args /* {
  784                 int s;
  785                 int backlog;
  786         } */ bsd_args;
  787 
  788         bsd_args.s = args->s;
  789         bsd_args.backlog = args->backlog;
  790         return (listen(td, &bsd_args));
  791 }
  792 
  793 struct linux_accept_args {
  794         int s;
  795         l_uintptr_t addr;
  796         l_uintptr_t namelen;
  797 };
  798 
  799 static int
  800 linux_accept(struct thread *td, struct linux_accept_args *args)
  801 {
  802         struct accept_args /* {
  803                 int     s;
  804                 struct sockaddr * __restrict name;
  805                 socklen_t * __restrict anamelen;
  806         } */ bsd_args;
  807         int error, fd;
  808 
  809         bsd_args.s = args->s;
  810         /* XXX: */
  811         bsd_args.name = (struct sockaddr * __restrict)PTRIN(args->addr);
  812         bsd_args.anamelen = PTRIN(args->namelen);/* XXX */
  813         error = accept(td, &bsd_args);
  814         bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.name);
  815         if (error) {
  816                 if (error == EFAULT && args->namelen != sizeof(struct sockaddr_in))
  817                         return (EINVAL);
  818                 return (error);
  819         }
  820         if (args->addr) {
  821                 error = linux_sa_put(PTRIN(args->addr));
  822                 if (error) {
  823                         (void)kern_close(td, td->td_retval[0]);
  824                         return (error);
  825                 }
  826         }
  827 
  828         /*
  829          * linux appears not to copy flags from the parent socket to the
  830          * accepted one, so we must clear the flags in the new descriptor.
  831          * Ignore any errors, because we already have an open fd.
  832          */
  833         fd = td->td_retval[0];
  834         (void)kern_fcntl(td, fd, F_SETFL, 0);
  835         td->td_retval[0] = fd;
  836         return (0);
  837 }
  838 
  839 struct linux_getsockname_args {
  840         int s;
  841         l_uintptr_t addr;
  842         l_uintptr_t namelen;
  843 };
  844 
  845 static int
  846 linux_getsockname(struct thread *td, struct linux_getsockname_args *args)
  847 {
  848         struct getsockname_args /* {
  849                 int     fdes;
  850                 struct sockaddr * __restrict asa;
  851                 socklen_t * __restrict alen;
  852         } */ bsd_args;
  853         int error;
  854 
  855         bsd_args.fdes = args->s;
  856         /* XXX: */
  857         bsd_args.asa = (struct sockaddr * __restrict)PTRIN(args->addr);
  858         bsd_args.alen = PTRIN(args->namelen);   /* XXX */
  859         error = getsockname(td, &bsd_args);
  860         bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa);
  861         if (error)
  862                 return (error);
  863         error = linux_sa_put(PTRIN(args->addr));
  864         if (error)
  865                 return (error);
  866         return (0);
  867 }
  868 
  869 struct linux_getpeername_args {
  870         int s;
  871         l_uintptr_t addr;
  872         l_uintptr_t namelen;
  873 };
  874 
  875 static int
  876 linux_getpeername(struct thread *td, struct linux_getpeername_args *args)
  877 {
  878         struct getpeername_args /* {
  879                 int fdes;
  880                 caddr_t asa;
  881                 int *alen;
  882         } */ bsd_args;
  883         int error;
  884 
  885         bsd_args.fdes = args->s;
  886         bsd_args.asa = (struct sockaddr *)PTRIN(args->addr);
  887         bsd_args.alen = (int *)PTRIN(args->namelen);
  888         error = getpeername(td, &bsd_args);
  889         bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa);
  890         if (error)
  891                 return (error);
  892         error = linux_sa_put(PTRIN(args->addr));
  893         if (error)
  894                 return (error);
  895         return (0);
  896 }
  897 
  898 struct linux_socketpair_args {
  899         int domain;
  900         int type;
  901         int protocol;
  902         l_uintptr_t rsv;
  903 };
  904 
  905 static int
  906 linux_socketpair(struct thread *td, struct linux_socketpair_args *args)
  907 {
  908         struct socketpair_args /* {
  909                 int domain;
  910                 int type;
  911                 int protocol;
  912                 int *rsv;
  913         } */ bsd_args;
  914 
  915         bsd_args.domain = linux_to_bsd_domain(args->domain);
  916         if (bsd_args.domain != PF_LOCAL)
  917                 return (EAFNOSUPPORT);
  918 
  919         bsd_args.type = args->type;
  920         if (args->protocol != 0 && args->protocol != PF_UNIX)
  921 
  922                 /*
  923                  * Use of PF_UNIX as protocol argument is not right,
  924                  * but Linux does it.
  925                  * Do not map PF_UNIX as its Linux value is identical
  926                  * to FreeBSD one.
  927                  */
  928                 return (EPROTONOSUPPORT);
  929         else
  930                 bsd_args.protocol = 0;
  931         bsd_args.rsv = (int *)PTRIN(args->rsv);
  932         return (socketpair(td, &bsd_args));
  933 }
  934 
  935 struct linux_send_args {
  936         int s;
  937         l_uintptr_t msg;
  938         int len;
  939         int flags;
  940 };
  941 
  942 static int
  943 linux_send(struct thread *td, struct linux_send_args *args)
  944 {
  945         struct sendto_args /* {
  946                 int s;
  947                 caddr_t buf;
  948                 int len;
  949                 int flags;
  950                 caddr_t to;
  951                 int tolen;
  952         } */ bsd_args;
  953 
  954         bsd_args.s = args->s;
  955         bsd_args.buf = (caddr_t)PTRIN(args->msg);
  956         bsd_args.len = args->len;
  957         bsd_args.flags = args->flags;
  958         bsd_args.to = NULL;
  959         bsd_args.tolen = 0;
  960         return sendto(td, &bsd_args);
  961 }
  962 
  963 struct linux_recv_args {
  964         int s;
  965         l_uintptr_t msg;
  966         int len;
  967         int flags;
  968 };
  969 
  970 static int
  971 linux_recv(struct thread *td, struct linux_recv_args *args)
  972 {
  973         struct recvfrom_args /* {
  974                 int s;
  975                 caddr_t buf;
  976                 int len;
  977                 int flags;
  978                 struct sockaddr *from;
  979                 socklen_t fromlenaddr;
  980         } */ bsd_args;
  981 
  982         bsd_args.s = args->s;
  983         bsd_args.buf = (caddr_t)PTRIN(args->msg);
  984         bsd_args.len = args->len;
  985         bsd_args.flags = linux_to_bsd_msg_flags(args->flags);
  986         bsd_args.from = NULL;
  987         bsd_args.fromlenaddr = 0;
  988         return (recvfrom(td, &bsd_args));
  989 }
  990 
  991 static int
  992 linux_sendto(struct thread *td, struct linux_sendto_args *args)
  993 {
  994         struct msghdr msg;
  995         struct iovec aiov;
  996         int error;
  997 
  998         if (linux_check_hdrincl(td, args->s) == 0)
  999                 /* IP_HDRINCL set, tweak the packet before sending */
 1000                 return (linux_sendto_hdrincl(td, args));
 1001 
 1002         msg.msg_name = PTRIN(args->to);
 1003         msg.msg_namelen = args->tolen;
 1004         msg.msg_iov = &aiov;
 1005         msg.msg_iovlen = 1;
 1006         msg.msg_control = NULL;
 1007         msg.msg_flags = 0;
 1008         aiov.iov_base = PTRIN(args->msg);
 1009         aiov.iov_len = args->len;
 1010         error = linux_sendit(td, args->s, &msg, args->flags, NULL,
 1011             UIO_USERSPACE);
 1012         return (error);
 1013 }
 1014 
 1015 struct linux_recvfrom_args {
 1016         int s;
 1017         l_uintptr_t buf;
 1018         int len;
 1019         int flags;
 1020         l_uintptr_t from;
 1021         l_uintptr_t fromlen;
 1022 };
 1023 
 1024 static int
 1025 linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args)
 1026 {
 1027         struct recvfrom_args /* {
 1028                 int     s;
 1029                 caddr_t buf;
 1030                 size_t  len;
 1031                 int     flags;
 1032                 struct sockaddr * __restrict from;
 1033                 socklen_t * __restrict fromlenaddr;
 1034         } */ bsd_args;
 1035         size_t len;
 1036         int error;
 1037 
 1038         if ((error = copyin(PTRIN(args->fromlen), &len, sizeof(size_t))))
 1039                 return (error);
 1040 
 1041         bsd_args.s = args->s;
 1042         bsd_args.buf = PTRIN(args->buf);
 1043         bsd_args.len = args->len;
 1044         bsd_args.flags = linux_to_bsd_msg_flags(args->flags);
 1045         /* XXX: */
 1046         bsd_args.from = (struct sockaddr * __restrict)PTRIN(args->from);
 1047         bsd_args.fromlenaddr = PTRIN(args->fromlen);/* XXX */
 1048         
 1049         linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.from, len);
 1050         error = recvfrom(td, &bsd_args);
 1051         bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.from);
 1052         
 1053         if (error)
 1054                 return (error);
 1055         if (args->from) {
 1056                 error = linux_sa_put((struct osockaddr *)
 1057                     PTRIN(args->from));
 1058                 if (error)
 1059                         return (error);
 1060         }
 1061         return (0);
 1062 }
 1063 
 1064 struct linux_sendmsg_args {
 1065         int s;
 1066         l_uintptr_t msg;
 1067         int flags;
 1068 };
 1069 
 1070 static int
 1071 linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args)
 1072 {
 1073         struct cmsghdr *cmsg;
 1074         struct cmsgcred cmcred;
 1075         struct mbuf *control;
 1076         struct msghdr msg;
 1077         struct l_cmsghdr linux_cmsg;
 1078         struct l_cmsghdr *ptr_cmsg;
 1079         struct l_msghdr linux_msg;
 1080         struct iovec *iov;
 1081         socklen_t datalen;
 1082         struct sockaddr *sa;
 1083         sa_family_t sa_family;
 1084         void *data;
 1085         int error;
 1086 
 1087         error = copyin(PTRIN(args->msg), &linux_msg, sizeof(linux_msg));
 1088         if (error)
 1089                 return (error);
 1090 
 1091         /*
 1092          * Some Linux applications (ping) define a non-NULL control data
 1093          * pointer, but a msg_controllen of 0, which is not allowed in the
 1094          * FreeBSD system call interface.  NULL the msg_control pointer in
 1095          * order to handle this case.  This should be checked, but allows the
 1096          * Linux ping to work.
 1097          */
 1098         if (PTRIN(linux_msg.msg_control) != NULL && linux_msg.msg_controllen == 0)
 1099                 linux_msg.msg_control = PTROUT(NULL);
 1100 
 1101         error = linux_to_bsd_msghdr(&msg, &linux_msg);
 1102         if (error)
 1103                 return (error);
 1104 
 1105 #ifdef COMPAT_LINUX32
 1106         error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen,
 1107             &iov, EMSGSIZE);
 1108 #else
 1109         error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
 1110 #endif
 1111         if (error)
 1112                 return (error);
 1113 
 1114         control = NULL;
 1115         cmsg = NULL;
 1116 
 1117         if ((ptr_cmsg = LINUX_CMSG_FIRSTHDR(&linux_msg)) != NULL) {
 1118                 error = kern_getsockname(td, args->s, &sa, &datalen);
 1119                 if (error)
 1120                         goto bad;
 1121                 sa_family = sa->sa_family;
 1122                 free(sa, M_SONAME);
 1123 
 1124                 error = ENOBUFS;
 1125                 cmsg = malloc(CMSG_HDRSZ, M_TEMP, M_WAITOK | M_ZERO);
 1126                 control = m_get(M_WAIT, MT_CONTROL);
 1127                 if (control == NULL)
 1128                         goto bad;
 1129 
 1130                 do {
 1131                         error = copyin(ptr_cmsg, &linux_cmsg,
 1132                             sizeof(struct l_cmsghdr));
 1133                         if (error)
 1134                                 goto bad;
 1135 
 1136                         error = EINVAL;
 1137                         if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr))
 1138                                 goto bad;
 1139 
 1140                         /*
 1141                          * Now we support only SCM_RIGHTS and SCM_CRED,
 1142                          * so return EINVAL in any other cmsg_type
 1143                          */
 1144                         cmsg->cmsg_type =
 1145                             linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type);
 1146                         cmsg->cmsg_level =
 1147                             linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level);
 1148                         if (cmsg->cmsg_type == -1
 1149                             || cmsg->cmsg_level != SOL_SOCKET)
 1150                                 goto bad;
 1151 
 1152                         /*
 1153                          * Some applications (e.g. pulseaudio) attempt to
 1154                          * send ancillary data even if the underlying protocol
 1155                          * doesn't support it which is not allowed in the
 1156                          * FreeBSD system call interface.
 1157                          */
 1158                         if (sa_family != AF_UNIX)
 1159                                 continue;
 1160 
 1161                         data = LINUX_CMSG_DATA(ptr_cmsg);
 1162                         datalen = linux_cmsg.cmsg_len - L_CMSG_HDRSZ;
 1163 
 1164                         switch (cmsg->cmsg_type)
 1165                         {
 1166                         case SCM_RIGHTS:
 1167                                 break;
 1168 
 1169                         case SCM_CREDS:
 1170                                 data = &cmcred;
 1171                                 datalen = sizeof(cmcred);
 1172 
 1173                                 /*
 1174                                  * The lower levels will fill in the structure
 1175                                  */
 1176                                 bzero(data, datalen);
 1177                                 break;
 1178                         }
 1179 
 1180                         cmsg->cmsg_len = CMSG_LEN(datalen);
 1181 
 1182                         error = ENOBUFS;
 1183                         if (!m_append(control, CMSG_HDRSZ, (c_caddr_t) cmsg))
 1184                                 goto bad;
 1185                         if (!m_append(control, datalen, (c_caddr_t) data))
 1186                                 goto bad;
 1187                 } while ((ptr_cmsg = LINUX_CMSG_NXTHDR(&linux_msg, ptr_cmsg)));
 1188 
 1189                 if (m_length(control, NULL) == 0) {
 1190                         m_freem(control);
 1191                         control = NULL;
 1192                 }
 1193         }
 1194 
 1195         msg.msg_iov = iov;
 1196         msg.msg_flags = 0;
 1197         error = linux_sendit(td, args->s, &msg, args->flags, control,
 1198             UIO_USERSPACE);
 1199 
 1200 bad:
 1201         free(iov, M_IOV);
 1202         if (cmsg)
 1203                 free(cmsg, M_TEMP);
 1204         return (error);
 1205 }
 1206 
 1207 struct linux_recvmsg_args {
 1208         int s;
 1209         l_uintptr_t msg;
 1210         int flags;
 1211 };
 1212 
 1213 static int
 1214 linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args)
 1215 {
 1216         struct cmsghdr *cm;
 1217         struct cmsgcred *cmcred;
 1218         struct msghdr msg;
 1219         struct l_cmsghdr *linux_cmsg = NULL;
 1220         struct l_ucred linux_ucred;
 1221         socklen_t datalen, outlen;
 1222         struct l_msghdr linux_msg;
 1223         struct iovec *iov, *uiov;
 1224         struct mbuf *control = NULL;
 1225         struct mbuf **controlp;
 1226         caddr_t outbuf;
 1227         void *data;
 1228         int error, i, fd, fds, *fdp;
 1229 
 1230         error = copyin(PTRIN(args->msg), &linux_msg, sizeof(linux_msg));
 1231         if (error)
 1232                 return (error);
 1233 
 1234         error = linux_to_bsd_msghdr(&msg, &linux_msg);
 1235         if (error)
 1236                 return (error);
 1237 
 1238 #ifdef COMPAT_LINUX32
 1239         error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen,
 1240             &iov, EMSGSIZE);
 1241 #else
 1242         error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
 1243 #endif
 1244         if (error)
 1245                 return (error);
 1246 
 1247         if (msg.msg_name) {
 1248                 error = linux_to_bsd_sockaddr((struct sockaddr *)msg.msg_name,
 1249                     msg.msg_namelen);
 1250                 if (error)
 1251                         goto bad;
 1252         }
 1253 
 1254         uiov = msg.msg_iov;
 1255         msg.msg_iov = iov;
 1256         controlp = (msg.msg_control != NULL) ? &control : NULL;
 1257         error = kern_recvit(td, args->s, &msg, UIO_USERSPACE, controlp);
 1258         msg.msg_iov = uiov;
 1259         if (error)
 1260                 goto bad;
 1261 
 1262         error = bsd_to_linux_msghdr(&msg, &linux_msg);
 1263         if (error)
 1264                 goto bad;
 1265 
 1266         if (linux_msg.msg_name) {
 1267                 error = bsd_to_linux_sockaddr((struct sockaddr *)
 1268                     PTRIN(linux_msg.msg_name));
 1269                 if (error)
 1270                         goto bad;
 1271         }
 1272         if (linux_msg.msg_name && linux_msg.msg_namelen > 2) {
 1273                 error = linux_sa_put(PTRIN(linux_msg.msg_name));
 1274                 if (error)
 1275                         goto bad;
 1276         }
 1277 
 1278         outbuf = PTRIN(linux_msg.msg_control);
 1279         outlen = 0;
 1280 
 1281         if (control) {
 1282                 linux_cmsg = malloc(L_CMSG_HDRSZ, M_TEMP, M_WAITOK | M_ZERO);
 1283 
 1284                 msg.msg_control = mtod(control, struct cmsghdr *);
 1285                 msg.msg_controllen = control->m_len;
 1286 
 1287                 cm = CMSG_FIRSTHDR(&msg);
 1288 
 1289                 while (cm != NULL) {
 1290                         linux_cmsg->cmsg_type =
 1291                             bsd_to_linux_cmsg_type(cm->cmsg_type);
 1292                         linux_cmsg->cmsg_level =
 1293                             bsd_to_linux_sockopt_level(cm->cmsg_level);
 1294                         if (linux_cmsg->cmsg_type == -1
 1295                             || cm->cmsg_level != SOL_SOCKET)
 1296                         {
 1297                                 error = EINVAL;
 1298                                 goto bad;
 1299                         }
 1300 
 1301                         data = CMSG_DATA(cm);
 1302                         datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data;
 1303 
 1304                         switch (cm->cmsg_type)
 1305                         {
 1306                         case SCM_RIGHTS:
 1307                                 if (args->flags & LINUX_MSG_CMSG_CLOEXEC) {
 1308                                         fds = datalen / sizeof(int);
 1309                                         fdp = data;
 1310                                         for (i = 0; i < fds; i++) {
 1311                                                 fd = *fdp++;
 1312                                                 (void)kern_fcntl(td, fd,
 1313                                                     F_SETFD, FD_CLOEXEC);
 1314                                         }
 1315                                 }
 1316                                 break;
 1317 
 1318                         case SCM_CREDS:
 1319                                 /*
 1320                                  * Currently LOCAL_CREDS is never in
 1321                                  * effect for Linux so no need to worry
 1322                                  * about sockcred
 1323                                  */
 1324                                 if (datalen != sizeof (*cmcred)) {
 1325                                         error = EMSGSIZE;
 1326                                         goto bad;
 1327                                 }
 1328                                 cmcred = (struct cmsgcred *)data;
 1329                                 bzero(&linux_ucred, sizeof(linux_ucred));
 1330                                 linux_ucred.pid = cmcred->cmcred_pid;
 1331                                 linux_ucred.uid = cmcred->cmcred_uid;
 1332                                 linux_ucred.gid = cmcred->cmcred_gid;
 1333                                 data = &linux_ucred;
 1334                                 datalen = sizeof(linux_ucred);
 1335                                 break;
 1336                         }
 1337 
 1338                         if (outlen + LINUX_CMSG_LEN(datalen) >
 1339                             linux_msg.msg_controllen) {
 1340                                 if (outlen == 0) {
 1341                                         error = EMSGSIZE;
 1342                                         goto bad;
 1343                                 } else {
 1344                                         linux_msg.msg_flags |=
 1345                                             LINUX_MSG_CTRUNC;
 1346                                         goto out;
 1347                                 }
 1348                         }
 1349 
 1350                         linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen);
 1351 
 1352                         error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ);
 1353                         if (error)
 1354                                 goto bad;
 1355                         outbuf += L_CMSG_HDRSZ;
 1356 
 1357                         error = copyout(data, outbuf, datalen);
 1358                         if (error)
 1359                                 goto bad;
 1360 
 1361                         outbuf += LINUX_CMSG_ALIGN(datalen);
 1362                         outlen += LINUX_CMSG_LEN(datalen);
 1363 
 1364                         cm = CMSG_NXTHDR(&msg, cm);
 1365                 }
 1366         }
 1367 
 1368 out:
 1369         linux_msg.msg_controllen = outlen;
 1370         error = copyout(&linux_msg, PTRIN(args->msg), sizeof(linux_msg));
 1371 
 1372 bad:
 1373         free(iov, M_IOV);
 1374         if (control != NULL)
 1375                 m_freem(control);
 1376         if (linux_cmsg != NULL)
 1377                 free(linux_cmsg, M_TEMP);
 1378 
 1379         return (error);
 1380 }
 1381 
 1382 struct linux_shutdown_args {
 1383         int s;
 1384         int how;
 1385 };
 1386 
 1387 static int
 1388 linux_shutdown(struct thread *td, struct linux_shutdown_args *args)
 1389 {
 1390         struct shutdown_args /* {
 1391                 int s;
 1392                 int how;
 1393         } */ bsd_args;
 1394 
 1395         bsd_args.s = args->s;
 1396         bsd_args.how = args->how;
 1397         return (shutdown(td, &bsd_args));
 1398 }
 1399 
 1400 struct linux_setsockopt_args {
 1401         int s;
 1402         int level;
 1403         int optname;
 1404         l_uintptr_t optval;
 1405         int optlen;
 1406 };
 1407 
 1408 static int
 1409 linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args)
 1410 {
 1411         struct setsockopt_args /* {
 1412                 int s;
 1413                 int level;
 1414                 int name;
 1415                 caddr_t val;
 1416                 int valsize;
 1417         } */ bsd_args;
 1418         l_timeval linux_tv;
 1419         struct timeval tv;
 1420         int error, name;
 1421 
 1422         bsd_args.s = args->s;
 1423         bsd_args.level = linux_to_bsd_sockopt_level(args->level);
 1424         switch (bsd_args.level) {
 1425         case SOL_SOCKET:
 1426                 name = linux_to_bsd_so_sockopt(args->optname);
 1427                 switch (name) {
 1428                 case SO_RCVTIMEO:
 1429                         /* FALLTHROUGH */
 1430                 case SO_SNDTIMEO:
 1431                         error = copyin(PTRIN(args->optval), &linux_tv,
 1432                             sizeof(linux_tv));
 1433                         if (error)
 1434                                 return (error);
 1435                         tv.tv_sec = linux_tv.tv_sec;
 1436                         tv.tv_usec = linux_tv.tv_usec;
 1437                         return (kern_setsockopt(td, args->s, bsd_args.level,
 1438                             name, &tv, UIO_SYSSPACE, sizeof(tv)));
 1439                         /* NOTREACHED */
 1440                         break;
 1441                 default:
 1442                         break;
 1443                 }
 1444                 break;
 1445         case IPPROTO_IP:
 1446                 name = linux_to_bsd_ip_sockopt(args->optname);
 1447                 break;
 1448         case IPPROTO_TCP:
 1449                 /* Linux TCP option values match BSD's */
 1450                 name = args->optname;
 1451                 break;
 1452         default:
 1453                 name = -1;
 1454                 break;
 1455         }
 1456         if (name == -1)
 1457                 return (ENOPROTOOPT);
 1458 
 1459         bsd_args.name = name;
 1460         bsd_args.val = PTRIN(args->optval);
 1461         bsd_args.valsize = args->optlen;
 1462 
 1463         if (name == IPV6_NEXTHOP) {
 1464                 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val,
 1465                         bsd_args.valsize);
 1466                 error = setsockopt(td, &bsd_args);
 1467                 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val);
 1468         } else
 1469                 error = setsockopt(td, &bsd_args);
 1470 
 1471         return (error);
 1472 }
 1473 
 1474 struct linux_getsockopt_args {
 1475         int s;
 1476         int level;
 1477         int optname;
 1478         l_uintptr_t optval;
 1479         l_uintptr_t optlen;
 1480 };
 1481 
 1482 static int
 1483 linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args)
 1484 {
 1485         struct getsockopt_args /* {
 1486                 int s;
 1487                 int level;
 1488                 int name;
 1489                 caddr_t val;
 1490                 int *avalsize;
 1491         } */ bsd_args;
 1492         l_timeval linux_tv;
 1493         struct timeval tv;
 1494         socklen_t tv_len, xulen;
 1495         struct xucred xu;
 1496         struct l_ucred lxu;
 1497         int error, name;
 1498 
 1499         bsd_args.s = args->s;
 1500         bsd_args.level = linux_to_bsd_sockopt_level(args->level);
 1501         switch (bsd_args.level) {
 1502         case SOL_SOCKET:
 1503                 name = linux_to_bsd_so_sockopt(args->optname);
 1504                 switch (name) {
 1505                 case SO_RCVTIMEO:
 1506                         /* FALLTHROUGH */
 1507                 case SO_SNDTIMEO:
 1508                         tv_len = sizeof(tv);
 1509                         error = kern_getsockopt(td, args->s, bsd_args.level,
 1510                             name, &tv, UIO_SYSSPACE, &tv_len);
 1511                         if (error)
 1512                                 return (error);
 1513                         linux_tv.tv_sec = tv.tv_sec;
 1514                         linux_tv.tv_usec = tv.tv_usec;
 1515                         return (copyout(&linux_tv, PTRIN(args->optval),
 1516                             sizeof(linux_tv)));
 1517                         /* NOTREACHED */
 1518                         break;
 1519                 case LOCAL_PEERCRED:
 1520                         if (args->optlen != sizeof(lxu))
 1521                                 return (EINVAL);
 1522                         xulen = sizeof(xu);
 1523                         error = kern_getsockopt(td, args->s, bsd_args.level,
 1524                             name, &xu, UIO_SYSSPACE, &xulen);
 1525                         if (error)
 1526                                 return (error);
 1527                         /*
 1528                          * XXX Use 0 for pid as the FreeBSD does not cache peer pid.
 1529                          */
 1530                         lxu.pid = 0;
 1531                         lxu.uid = xu.cr_uid;
 1532                         lxu.gid = xu.cr_gid;
 1533                         return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu)));
 1534                         /* NOTREACHED */
 1535                         break;
 1536                 default:
 1537                         break;
 1538                 }
 1539                 break;
 1540         case IPPROTO_IP:
 1541                 name = linux_to_bsd_ip_sockopt(args->optname);
 1542                 break;
 1543         case IPPROTO_TCP:
 1544                 /* Linux TCP option values match BSD's */
 1545                 name = args->optname;
 1546                 break;
 1547         default:
 1548                 name = -1;
 1549                 break;
 1550         }
 1551         if (name == -1)
 1552                 return (EINVAL);
 1553 
 1554         bsd_args.name = name;
 1555         bsd_args.val = PTRIN(args->optval);
 1556         bsd_args.avalsize = PTRIN(args->optlen);
 1557 
 1558         if (name == IPV6_NEXTHOP) {
 1559                 error = getsockopt(td, &bsd_args);
 1560                 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val);
 1561         } else
 1562                 error = getsockopt(td, &bsd_args);
 1563 
 1564         return (error);
 1565 }
 1566 
 1567 /* Argument list sizes for linux_socketcall */
 1568 
 1569 #define LINUX_AL(x) ((x) * sizeof(l_ulong))
 1570 
 1571 static const unsigned char lxs_args[] = {
 1572         LINUX_AL(0) /* unused*/,        LINUX_AL(3) /* socket */,
 1573         LINUX_AL(3) /* bind */,         LINUX_AL(3) /* connect */,
 1574         LINUX_AL(2) /* listen */,       LINUX_AL(3) /* accept */,
 1575         LINUX_AL(3) /* getsockname */,  LINUX_AL(3) /* getpeername */,
 1576         LINUX_AL(4) /* socketpair */,   LINUX_AL(4) /* send */,
 1577         LINUX_AL(4) /* recv */,         LINUX_AL(6) /* sendto */,
 1578         LINUX_AL(6) /* recvfrom */,     LINUX_AL(2) /* shutdown */,
 1579         LINUX_AL(5) /* setsockopt */,   LINUX_AL(5) /* getsockopt */,
 1580         LINUX_AL(3) /* sendmsg */,      LINUX_AL(3) /* recvmsg */
 1581 };
 1582 
 1583 #define LINUX_AL_SIZE   sizeof(lxs_args) / sizeof(lxs_args[0]) - 1
 1584 
 1585 int
 1586 linux_socketcall(struct thread *td, struct linux_socketcall_args *args)
 1587 {
 1588         l_ulong a[6];
 1589         void *arg;
 1590         int error;
 1591 
 1592         if (args->what < LINUX_SOCKET || args->what > LINUX_AL_SIZE)
 1593                 return (EINVAL);
 1594         error = copyin(PTRIN(args->args), a, lxs_args[args->what]);
 1595         if (error)
 1596                 return (error);
 1597 
 1598         arg = a;
 1599         switch (args->what) {
 1600         case LINUX_SOCKET:
 1601                 return (linux_socket(td, arg));
 1602         case LINUX_BIND:
 1603                 return (linux_bind(td, arg));
 1604         case LINUX_CONNECT:
 1605                 return (linux_connect(td, arg));
 1606         case LINUX_LISTEN:
 1607                 return (linux_listen(td, arg));
 1608         case LINUX_ACCEPT:
 1609                 return (linux_accept(td, arg));
 1610         case LINUX_GETSOCKNAME:
 1611                 return (linux_getsockname(td, arg));
 1612         case LINUX_GETPEERNAME:
 1613                 return (linux_getpeername(td, arg));
 1614         case LINUX_SOCKETPAIR:
 1615                 return (linux_socketpair(td, arg));
 1616         case LINUX_SEND:
 1617                 return (linux_send(td, arg));
 1618         case LINUX_RECV:
 1619                 return (linux_recv(td, arg));
 1620         case LINUX_SENDTO:
 1621                 return (linux_sendto(td, arg));
 1622         case LINUX_RECVFROM:
 1623                 return (linux_recvfrom(td, arg));
 1624         case LINUX_SHUTDOWN:
 1625                 return (linux_shutdown(td, arg));
 1626         case LINUX_SETSOCKOPT:
 1627                 return (linux_setsockopt(td, arg));
 1628         case LINUX_GETSOCKOPT:
 1629                 return (linux_getsockopt(td, arg));
 1630         case LINUX_SENDMSG:
 1631                 return (linux_sendmsg(td, arg));
 1632         case LINUX_RECVMSG:
 1633                 return (linux_recvmsg(td, arg));
 1634         }
 1635 
 1636         uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what);
 1637         return (ENOSYS);
 1638 }

Cache object: ab09da9e7708187415989e8a36d0d4ee


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