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/7.3/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 = EINVAL;
  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 
  162         if ((bdom == AF_LOCAL) && (*osalen > sizeof(struct sockaddr_un))) {
  163                 for (namelen = 0;
  164                     namelen < *osalen - offsetof(struct sockaddr_un, sun_path);
  165                     namelen++)
  166                         if (!((struct sockaddr_un *)kosa)->sun_path[namelen])
  167                                 break;
  168                 if (namelen + offsetof(struct sockaddr_un, sun_path) >
  169                     sizeof(struct sockaddr_un)) {
  170                         error = EINVAL;
  171                         goto out;
  172                 }
  173                 alloclen = sizeof(struct sockaddr_un);
  174         }
  175 
  176         sa = (struct sockaddr *) kosa;
  177         sa->sa_family = bdom;
  178         sa->sa_len = alloclen;
  179 
  180         *sap = sa;
  181         *osalen = alloclen;
  182         return (0);
  183 
  184 out:
  185         FREE(kosa, mtype);
  186         return (error);
  187 }
  188 
  189 static int
  190 linux_to_bsd_domain(int domain)
  191 {
  192 
  193         switch (domain) {
  194         case LINUX_AF_UNSPEC:
  195                 return (AF_UNSPEC);
  196         case LINUX_AF_UNIX:
  197                 return (AF_LOCAL);
  198         case LINUX_AF_INET:
  199                 return (AF_INET);
  200         case LINUX_AF_INET6:
  201                 return (AF_INET6);
  202         case LINUX_AF_AX25:
  203                 return (AF_CCITT);
  204         case LINUX_AF_IPX:
  205                 return (AF_IPX);
  206         case LINUX_AF_APPLETALK:
  207                 return (AF_APPLETALK);
  208         }
  209         return (-1);
  210 }
  211 
  212 static int
  213 bsd_to_linux_domain(int domain)
  214 {
  215 
  216         switch (domain) {
  217         case AF_UNSPEC:
  218                 return (LINUX_AF_UNSPEC);
  219         case AF_LOCAL:
  220                 return (LINUX_AF_UNIX);
  221         case AF_INET:
  222                 return (LINUX_AF_INET);
  223         case AF_INET6:
  224                 return (LINUX_AF_INET6);
  225         case AF_CCITT:
  226                 return (LINUX_AF_AX25);
  227         case AF_IPX:
  228                 return (LINUX_AF_IPX);
  229         case AF_APPLETALK:
  230                 return (LINUX_AF_APPLETALK);
  231         }
  232         return (-1);
  233 }
  234 
  235 static int
  236 linux_to_bsd_sockopt_level(int level)
  237 {
  238 
  239         switch (level) {
  240         case LINUX_SOL_SOCKET:
  241                 return (SOL_SOCKET);
  242         }
  243         return (level);
  244 }
  245 
  246 static int
  247 bsd_to_linux_sockopt_level(int level)
  248 {
  249 
  250         switch (level) {
  251         case SOL_SOCKET:
  252                 return (LINUX_SOL_SOCKET);
  253         }
  254         return (level);
  255 }
  256 
  257 static int
  258 linux_to_bsd_ip_sockopt(int opt)
  259 {
  260 
  261         switch (opt) {
  262         case LINUX_IP_TOS:
  263                 return (IP_TOS);
  264         case LINUX_IP_TTL:
  265                 return (IP_TTL);
  266         case LINUX_IP_OPTIONS:
  267                 return (IP_OPTIONS);
  268         case LINUX_IP_MULTICAST_IF:
  269                 return (IP_MULTICAST_IF);
  270         case LINUX_IP_MULTICAST_TTL:
  271                 return (IP_MULTICAST_TTL);
  272         case LINUX_IP_MULTICAST_LOOP:
  273                 return (IP_MULTICAST_LOOP);
  274         case LINUX_IP_ADD_MEMBERSHIP:
  275                 return (IP_ADD_MEMBERSHIP);
  276         case LINUX_IP_DROP_MEMBERSHIP:
  277                 return (IP_DROP_MEMBERSHIP);
  278         case LINUX_IP_HDRINCL:
  279                 return (IP_HDRINCL);
  280         }
  281         return (-1);
  282 }
  283 
  284 static int
  285 linux_to_bsd_so_sockopt(int opt)
  286 {
  287 
  288         switch (opt) {
  289         case LINUX_SO_DEBUG:
  290                 return (SO_DEBUG);
  291         case LINUX_SO_REUSEADDR:
  292                 return (SO_REUSEADDR);
  293         case LINUX_SO_TYPE:
  294                 return (SO_TYPE);
  295         case LINUX_SO_ERROR:
  296                 return (SO_ERROR);
  297         case LINUX_SO_DONTROUTE:
  298                 return (SO_DONTROUTE);
  299         case LINUX_SO_BROADCAST:
  300                 return (SO_BROADCAST);
  301         case LINUX_SO_SNDBUF:
  302                 return (SO_SNDBUF);
  303         case LINUX_SO_RCVBUF:
  304                 return (SO_RCVBUF);
  305         case LINUX_SO_KEEPALIVE:
  306                 return (SO_KEEPALIVE);
  307         case LINUX_SO_OOBINLINE:
  308                 return (SO_OOBINLINE);
  309         case LINUX_SO_LINGER:
  310                 return (SO_LINGER);
  311         case LINUX_SO_PEERCRED:
  312                 return (LOCAL_PEERCRED);
  313         case LINUX_SO_RCVLOWAT:
  314                 return (SO_RCVLOWAT);
  315         case LINUX_SO_SNDLOWAT:
  316                 return (SO_SNDLOWAT);
  317         case LINUX_SO_RCVTIMEO:
  318                 return (SO_RCVTIMEO);
  319         case LINUX_SO_SNDTIMEO:
  320                 return (SO_SNDTIMEO);
  321         case LINUX_SO_TIMESTAMP:
  322                 return (SO_TIMESTAMP);
  323         case LINUX_SO_ACCEPTCONN:
  324                 return (SO_ACCEPTCONN);
  325         }
  326         return (-1);
  327 }
  328 
  329 static int
  330 linux_to_bsd_msg_flags(int flags)
  331 {
  332         int ret_flags = 0;
  333 
  334         if (flags & LINUX_MSG_OOB)
  335                 ret_flags |= MSG_OOB;
  336         if (flags & LINUX_MSG_PEEK)
  337                 ret_flags |= MSG_PEEK;
  338         if (flags & LINUX_MSG_DONTROUTE)
  339                 ret_flags |= MSG_DONTROUTE;
  340         if (flags & LINUX_MSG_CTRUNC)
  341                 ret_flags |= MSG_CTRUNC;
  342         if (flags & LINUX_MSG_TRUNC)
  343                 ret_flags |= MSG_TRUNC;
  344         if (flags & LINUX_MSG_DONTWAIT)
  345                 ret_flags |= MSG_DONTWAIT;
  346         if (flags & LINUX_MSG_EOR)
  347                 ret_flags |= MSG_EOR;
  348         if (flags & LINUX_MSG_WAITALL)
  349                 ret_flags |= MSG_WAITALL;
  350         if (flags & LINUX_MSG_NOSIGNAL)
  351                 ret_flags |= MSG_NOSIGNAL;
  352 #if 0 /* not handled */
  353         if (flags & LINUX_MSG_PROXY)
  354                 ;
  355         if (flags & LINUX_MSG_FIN)
  356                 ;
  357         if (flags & LINUX_MSG_SYN)
  358                 ;
  359         if (flags & LINUX_MSG_CONFIRM)
  360                 ;
  361         if (flags & LINUX_MSG_RST)
  362                 ;
  363         if (flags & LINUX_MSG_ERRQUEUE)
  364                 ;
  365 #endif
  366         return ret_flags;
  367 }
  368 
  369 /*
  370 * If bsd_to_linux_sockaddr() or linux_to_bsd_sockaddr() faults, then the
  371 * native syscall will fault.  Thus, we don't really need to check the
  372 * return values for these functions.
  373 */
  374 
  375 static int
  376 bsd_to_linux_sockaddr(struct sockaddr *arg)
  377 {
  378         struct sockaddr sa;
  379         size_t sa_len = sizeof(struct sockaddr);
  380         int error;
  381         
  382         if ((error = copyin(arg, &sa, sa_len)))
  383                 return (error);
  384         
  385         *(u_short *)&sa = sa.sa_family;
  386         
  387         error = copyout(&sa, arg, sa_len);
  388         
  389         return (error);
  390 }
  391 
  392 static int
  393 linux_to_bsd_sockaddr(struct sockaddr *arg, int len)
  394 {
  395         struct sockaddr sa;
  396         size_t sa_len = sizeof(struct sockaddr);
  397         int error;
  398 
  399         if ((error = copyin(arg, &sa, sa_len)))
  400                 return (error);
  401 
  402         sa.sa_family = *(sa_family_t *)&sa;
  403         sa.sa_len = len;
  404 
  405         error = copyout(&sa, arg, sa_len);
  406 
  407         return (error);
  408 }
  409 
  410 
  411 static int
  412 linux_sa_put(struct osockaddr *osa)
  413 {
  414         struct osockaddr sa;
  415         int error, bdom;
  416 
  417         /*
  418          * Only read/write the osockaddr family part, the rest is
  419          * not changed.
  420          */
  421         error = copyin(osa, &sa, sizeof(sa.sa_family));
  422         if (error)
  423                 return (error);
  424 
  425         bdom = bsd_to_linux_domain(sa.sa_family);
  426         if (bdom == -1)
  427                 return (EINVAL);
  428 
  429         sa.sa_family = bdom;
  430         error = copyout(&sa, osa, sizeof(sa.sa_family));
  431         if (error)
  432                 return (error);
  433 
  434         return (0);
  435 }
  436 
  437 static int
  438 linux_to_bsd_cmsg_type(int cmsg_type)
  439 {
  440 
  441         switch (cmsg_type) {
  442         case LINUX_SCM_RIGHTS:
  443                 return (SCM_RIGHTS);
  444         }
  445         return (-1);
  446 }
  447 
  448 static int
  449 bsd_to_linux_cmsg_type(int cmsg_type)
  450 {
  451 
  452         switch (cmsg_type) {
  453         case SCM_RIGHTS:
  454                 return (LINUX_SCM_RIGHTS);
  455         }
  456         return (-1);
  457 }
  458 
  459 
  460 
  461 static int
  462 linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr)
  463 {
  464         if (lhdr->msg_controllen > INT_MAX)
  465                 return (ENOBUFS);
  466 
  467         bhdr->msg_name          = PTRIN(lhdr->msg_name);
  468         bhdr->msg_namelen       = lhdr->msg_namelen;
  469         bhdr->msg_iov           = PTRIN(lhdr->msg_iov);
  470         bhdr->msg_iovlen        = lhdr->msg_iovlen;
  471         bhdr->msg_control       = PTRIN(lhdr->msg_control);
  472         bhdr->msg_controllen    = lhdr->msg_controllen;
  473         bhdr->msg_flags         = linux_to_bsd_msg_flags(lhdr->msg_flags);
  474         return (0);
  475 }
  476 
  477 static int
  478 bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr)
  479 {
  480         lhdr->msg_name          = PTROUT(bhdr->msg_name);
  481         lhdr->msg_namelen       = bhdr->msg_namelen;
  482         lhdr->msg_iov           = PTROUT(bhdr->msg_iov);
  483         lhdr->msg_iovlen        = bhdr->msg_iovlen;
  484         lhdr->msg_control       = PTROUT(bhdr->msg_control);
  485         lhdr->msg_controllen    = bhdr->msg_controllen;
  486         /* msg_flags skipped */
  487         return (0);
  488 }
  489 
  490 static int
  491 linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags,
  492     struct mbuf *control, enum uio_seg segflg)
  493 {
  494         struct sockaddr *to;
  495         int error;
  496 
  497         if (mp->msg_name != NULL) {
  498                 error = linux_getsockaddr(&to, mp->msg_name, mp->msg_namelen);
  499                 if (error)
  500                         return (error);
  501                 mp->msg_name = to;
  502         } else
  503                 to = NULL;
  504 
  505         error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control,
  506             segflg);
  507 
  508         if (to)
  509                 FREE(to, M_SONAME);
  510         return (error);
  511 }
  512 
  513 /* Return 0 if IP_HDRINCL is set for the given socket. */
  514 static int
  515 linux_check_hdrincl(struct thread *td, int s)
  516 {
  517         int error, optval, size_val;
  518 
  519         size_val = sizeof(optval);
  520         error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL,
  521             &optval, UIO_SYSSPACE, &size_val);
  522         if (error)
  523                 return (error);
  524 
  525         return (optval == 0);
  526 }
  527 
  528 struct linux_sendto_args {
  529         int s;
  530         l_uintptr_t msg;
  531         int len;
  532         int flags;
  533         l_uintptr_t to;
  534         int tolen;
  535 };
  536 
  537 /*
  538  * Updated sendto() when IP_HDRINCL is set:
  539  * tweak endian-dependent fields in the IP packet.
  540  */
  541 static int
  542 linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args)
  543 {
  544 /*
  545  * linux_ip_copysize defines how many bytes we should copy
  546  * from the beginning of the IP packet before we customize it for BSD.
  547  * It should include all the fields we modify (ip_len and ip_off).
  548  */
  549 #define linux_ip_copysize       8
  550 
  551         struct ip *packet;
  552         struct msghdr msg;
  553         struct iovec aiov[1];
  554         int error;
  555 
  556         /* Check that the packet isn't too big or too small. */
  557         if (linux_args->len < linux_ip_copysize ||
  558             linux_args->len > IP_MAXPACKET)
  559                 return (EINVAL);
  560 
  561         packet = (struct ip *)malloc(linux_args->len, M_TEMP, M_WAITOK);
  562 
  563         /* Make kernel copy of the packet to be sent */
  564         if ((error = copyin(PTRIN(linux_args->msg), packet,
  565             linux_args->len)))
  566                 goto goout;
  567 
  568         /* Convert fields from Linux to BSD raw IP socket format */
  569         packet->ip_len = linux_args->len;
  570         packet->ip_off = ntohs(packet->ip_off);
  571 
  572         /* Prepare the msghdr and iovec structures describing the new packet */
  573         msg.msg_name = PTRIN(linux_args->to);
  574         msg.msg_namelen = linux_args->tolen;
  575         msg.msg_iov = aiov;
  576         msg.msg_iovlen = 1;
  577         msg.msg_control = NULL;
  578         msg.msg_flags = 0;
  579         aiov[0].iov_base = (char *)packet;
  580         aiov[0].iov_len = linux_args->len;
  581         error = linux_sendit(td, linux_args->s, &msg, linux_args->flags,
  582             NULL, UIO_SYSSPACE);
  583 goout:
  584         free(packet, M_TEMP);
  585         return (error);
  586 }
  587 
  588 struct linux_socket_args {
  589         int domain;
  590         int type;
  591         int protocol;
  592 };
  593 
  594 static int
  595 linux_socket(struct thread *td, struct linux_socket_args *args)
  596 {
  597         struct socket_args /* {
  598                 int domain;
  599                 int type;
  600                 int protocol;
  601         } */ bsd_args;
  602         int retval_socket, socket_flags;
  603 
  604         bsd_args.protocol = args->protocol;
  605         socket_flags = args->type & ~LINUX_SOCK_TYPE_MASK;
  606         if (socket_flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK))
  607                 return (EINVAL);
  608         bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK;
  609         if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX)
  610                 return (EINVAL);
  611         bsd_args.domain = linux_to_bsd_domain(args->domain);
  612         if (bsd_args.domain == -1)
  613                 return (EAFNOSUPPORT);
  614 
  615         retval_socket = socket(td, &bsd_args);
  616         if (retval_socket)
  617                 return (retval_socket);
  618 
  619         if (socket_flags & LINUX_SOCK_NONBLOCK) {
  620                 retval_socket = kern_fcntl(td, td->td_retval[0],
  621                     F_SETFL, O_NONBLOCK);
  622                 if (retval_socket) {
  623                         (void)kern_close(td, td->td_retval[0]);
  624                         goto out;
  625                 }
  626         }
  627         if (socket_flags & LINUX_SOCK_CLOEXEC) {
  628                 retval_socket = kern_fcntl(td, td->td_retval[0],
  629                     F_SETFD, FD_CLOEXEC);
  630                 if (retval_socket) {
  631                         (void)kern_close(td, td->td_retval[0]);
  632                         goto out;
  633                 }
  634         }
  635 
  636         if (bsd_args.type == SOCK_RAW
  637             && (bsd_args.protocol == IPPROTO_RAW || bsd_args.protocol == 0)
  638             && bsd_args.domain == PF_INET) {
  639                 /* It's a raw IP socket: set the IP_HDRINCL option. */
  640                 int hdrincl;
  641 
  642                 hdrincl = 1;
  643                 /* We ignore any error returned by kern_setsockopt() */
  644                 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL,
  645                     &hdrincl, UIO_SYSSPACE, sizeof(hdrincl));
  646         }
  647 #ifdef INET6
  648         /*
  649          * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by
  650          * default and some apps depend on this. So, set V6ONLY to 0
  651          * for Linux apps if the sysctl value is set to 1.
  652          */
  653         if (bsd_args.domain == PF_INET6
  654 #ifndef KLD_MODULE
  655             /*
  656              * XXX: Avoid undefined symbol error with an IPv4 only
  657              * kernel.
  658              */
  659             && ip6_v6only
  660 #endif
  661             ) {
  662                 int v6only;
  663 
  664                 v6only = 0;
  665                 /* We ignore any error returned by setsockopt() */
  666                 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY,
  667                     &v6only, UIO_SYSSPACE, sizeof(v6only));
  668         }
  669 #endif
  670 
  671 out:
  672         return (retval_socket);
  673 }
  674 
  675 struct linux_bind_args {
  676         int s;
  677         l_uintptr_t name;
  678         int namelen;
  679 };
  680 
  681 static int
  682 linux_bind(struct thread *td, struct linux_bind_args *args)
  683 {
  684         struct sockaddr *sa;
  685         int error;
  686 
  687         error = linux_getsockaddr(&sa, PTRIN(args->name),
  688             args->namelen);
  689         if (error)
  690                 return (error);
  691 
  692         error = kern_bind(td, args->s, sa);
  693         free(sa, M_SONAME);
  694         if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in))
  695                 return (EINVAL);
  696         return (error);
  697 }
  698 
  699 struct linux_connect_args {
  700         int s;
  701         l_uintptr_t name;
  702         int namelen;
  703 };
  704 int linux_connect(struct thread *, struct linux_connect_args *);
  705 
  706 int
  707 linux_connect(struct thread *td, struct linux_connect_args *args)
  708 {
  709         struct socket *so;
  710         struct sockaddr *sa;
  711         u_int fflag;
  712         int error;
  713 
  714         error = linux_getsockaddr(&sa, (struct osockaddr *)PTRIN(args->name),
  715             args->namelen);
  716         if (error)
  717                 return (error);
  718 
  719         error = kern_connect(td, args->s, sa);
  720         free(sa, M_SONAME);
  721         if (error != EISCONN)
  722                 return (error);
  723 
  724         /*
  725          * Linux doesn't return EISCONN the first time it occurs,
  726          * when on a non-blocking socket. Instead it returns the
  727          * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD.
  728          *
  729          * XXXRW: Instead of using fgetsock(), check that it is a
  730          * socket and use the file descriptor reference instead of
  731          * creating a new one.
  732          */
  733         error = fgetsock(td, args->s, &so, &fflag);
  734         if (error == 0) {
  735                 error = EISCONN;
  736                 if (fflag & FNONBLOCK) {
  737                         SOCK_LOCK(so);
  738                         if (so->so_emuldata == 0)
  739                                 error = so->so_error;
  740                         so->so_emuldata = (void *)1;
  741                         SOCK_UNLOCK(so);
  742                 }
  743                 fputsock(so);
  744         }
  745         return (error);
  746 }
  747 
  748 struct linux_listen_args {
  749         int s;
  750         int backlog;
  751 };
  752 
  753 static int
  754 linux_listen(struct thread *td, struct linux_listen_args *args)
  755 {
  756         struct listen_args /* {
  757                 int s;
  758                 int backlog;
  759         } */ bsd_args;
  760 
  761         bsd_args.s = args->s;
  762         bsd_args.backlog = args->backlog;
  763         return (listen(td, &bsd_args));
  764 }
  765 
  766 struct linux_accept_args {
  767         int s;
  768         l_uintptr_t addr;
  769         l_uintptr_t namelen;
  770 };
  771 
  772 static int
  773 linux_accept(struct thread *td, struct linux_accept_args *args)
  774 {
  775         struct accept_args /* {
  776                 int     s;
  777                 struct sockaddr * __restrict name;
  778                 socklen_t * __restrict anamelen;
  779         } */ bsd_args;
  780         int error, fd;
  781 
  782         bsd_args.s = args->s;
  783         /* XXX: */
  784         bsd_args.name = (struct sockaddr * __restrict)PTRIN(args->addr);
  785         bsd_args.anamelen = PTRIN(args->namelen);/* XXX */
  786         error = accept(td, &bsd_args);
  787         bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.name);
  788         if (error) {
  789                 if (error == EFAULT && args->namelen != sizeof(struct sockaddr_in))
  790                         return (EINVAL);
  791                 return (error);
  792         }
  793         if (args->addr) {
  794                 error = linux_sa_put(PTRIN(args->addr));
  795                 if (error) {
  796                         (void)kern_close(td, td->td_retval[0]);
  797                         return (error);
  798                 }
  799         }
  800 
  801         /*
  802          * linux appears not to copy flags from the parent socket to the
  803          * accepted one, so we must clear the flags in the new descriptor.
  804          * Ignore any errors, because we already have an open fd.
  805          */
  806         fd = td->td_retval[0];
  807         (void)kern_fcntl(td, fd, F_SETFL, 0);
  808         td->td_retval[0] = fd;
  809         return (0);
  810 }
  811 
  812 struct linux_getsockname_args {
  813         int s;
  814         l_uintptr_t addr;
  815         l_uintptr_t namelen;
  816 };
  817 
  818 static int
  819 linux_getsockname(struct thread *td, struct linux_getsockname_args *args)
  820 {
  821         struct getsockname_args /* {
  822                 int     fdes;
  823                 struct sockaddr * __restrict asa;
  824                 socklen_t * __restrict alen;
  825         } */ bsd_args;
  826         int error;
  827 
  828         bsd_args.fdes = args->s;
  829         /* XXX: */
  830         bsd_args.asa = (struct sockaddr * __restrict)PTRIN(args->addr);
  831         bsd_args.alen = PTRIN(args->namelen);   /* XXX */
  832         error = getsockname(td, &bsd_args);
  833         bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa);
  834         if (error)
  835                 return (error);
  836         error = linux_sa_put(PTRIN(args->addr));
  837         if (error)
  838                 return (error);
  839         return (0);
  840 }
  841 
  842 struct linux_getpeername_args {
  843         int s;
  844         l_uintptr_t addr;
  845         l_uintptr_t namelen;
  846 };
  847 
  848 static int
  849 linux_getpeername(struct thread *td, struct linux_getpeername_args *args)
  850 {
  851         struct getpeername_args /* {
  852                 int fdes;
  853                 caddr_t asa;
  854                 int *alen;
  855         } */ bsd_args;
  856         int error;
  857 
  858         bsd_args.fdes = args->s;
  859         bsd_args.asa = (struct sockaddr *)PTRIN(args->addr);
  860         bsd_args.alen = (int *)PTRIN(args->namelen);
  861         error = getpeername(td, &bsd_args);
  862         bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa);
  863         if (error)
  864                 return (error);
  865         error = linux_sa_put(PTRIN(args->addr));
  866         if (error)
  867                 return (error);
  868         return (0);
  869 }
  870 
  871 struct linux_socketpair_args {
  872         int domain;
  873         int type;
  874         int protocol;
  875         l_uintptr_t rsv;
  876 };
  877 
  878 static int
  879 linux_socketpair(struct thread *td, struct linux_socketpair_args *args)
  880 {
  881         struct socketpair_args /* {
  882                 int domain;
  883                 int type;
  884                 int protocol;
  885                 int *rsv;
  886         } */ bsd_args;
  887 
  888         bsd_args.domain = linux_to_bsd_domain(args->domain);
  889         if (bsd_args.domain != PF_LOCAL)
  890                 return (EAFNOSUPPORT);
  891 
  892         bsd_args.type = args->type;
  893         if (args->protocol != 0 && args->protocol != PF_UNIX)
  894 
  895                 /*
  896                  * Use of PF_UNIX as protocol argument is not right,
  897                  * but Linux does it.
  898                  * Do not map PF_UNIX as its Linux value is identical
  899                  * to FreeBSD one.
  900                  */
  901                 return (EPROTONOSUPPORT);
  902         else
  903                 bsd_args.protocol = 0;
  904         bsd_args.rsv = (int *)PTRIN(args->rsv);
  905         return (socketpair(td, &bsd_args));
  906 }
  907 
  908 struct linux_send_args {
  909         int s;
  910         l_uintptr_t msg;
  911         int len;
  912         int flags;
  913 };
  914 
  915 static int
  916 linux_send(struct thread *td, struct linux_send_args *args)
  917 {
  918         struct sendto_args /* {
  919                 int s;
  920                 caddr_t buf;
  921                 int len;
  922                 int flags;
  923                 caddr_t to;
  924                 int tolen;
  925         } */ bsd_args;
  926 
  927         bsd_args.s = args->s;
  928         bsd_args.buf = (caddr_t)PTRIN(args->msg);
  929         bsd_args.len = args->len;
  930         bsd_args.flags = args->flags;
  931         bsd_args.to = NULL;
  932         bsd_args.tolen = 0;
  933         return sendto(td, &bsd_args);
  934 }
  935 
  936 struct linux_recv_args {
  937         int s;
  938         l_uintptr_t msg;
  939         int len;
  940         int flags;
  941 };
  942 
  943 static int
  944 linux_recv(struct thread *td, struct linux_recv_args *args)
  945 {
  946         struct recvfrom_args /* {
  947                 int s;
  948                 caddr_t buf;
  949                 int len;
  950                 int flags;
  951                 struct sockaddr *from;
  952                 socklen_t fromlenaddr;
  953         } */ bsd_args;
  954 
  955         bsd_args.s = args->s;
  956         bsd_args.buf = (caddr_t)PTRIN(args->msg);
  957         bsd_args.len = args->len;
  958         bsd_args.flags = linux_to_bsd_msg_flags(args->flags);
  959         bsd_args.from = NULL;
  960         bsd_args.fromlenaddr = 0;
  961         return (recvfrom(td, &bsd_args));
  962 }
  963 
  964 static int
  965 linux_sendto(struct thread *td, struct linux_sendto_args *args)
  966 {
  967         struct msghdr msg;
  968         struct iovec aiov;
  969         int error;
  970 
  971         if (linux_check_hdrincl(td, args->s) == 0)
  972                 /* IP_HDRINCL set, tweak the packet before sending */
  973                 return (linux_sendto_hdrincl(td, args));
  974 
  975         msg.msg_name = PTRIN(args->to);
  976         msg.msg_namelen = args->tolen;
  977         msg.msg_iov = &aiov;
  978         msg.msg_iovlen = 1;
  979         msg.msg_control = NULL;
  980         msg.msg_flags = 0;
  981         aiov.iov_base = PTRIN(args->msg);
  982         aiov.iov_len = args->len;
  983         error = linux_sendit(td, args->s, &msg, args->flags, NULL,
  984             UIO_USERSPACE);
  985         return (error);
  986 }
  987 
  988 struct linux_recvfrom_args {
  989         int s;
  990         l_uintptr_t buf;
  991         int len;
  992         int flags;
  993         l_uintptr_t from;
  994         l_uintptr_t fromlen;
  995 };
  996 
  997 static int
  998 linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args)
  999 {
 1000         struct recvfrom_args /* {
 1001                 int     s;
 1002                 caddr_t buf;
 1003                 size_t  len;
 1004                 int     flags;
 1005                 struct sockaddr * __restrict from;
 1006                 socklen_t * __restrict fromlenaddr;
 1007         } */ bsd_args;
 1008         size_t len;
 1009         int error;
 1010 
 1011         if ((error = copyin(PTRIN(args->fromlen), &len, sizeof(size_t))))
 1012                 return (error);
 1013 
 1014         bsd_args.s = args->s;
 1015         bsd_args.buf = PTRIN(args->buf);
 1016         bsd_args.len = args->len;
 1017         bsd_args.flags = linux_to_bsd_msg_flags(args->flags);
 1018         /* XXX: */
 1019         bsd_args.from = (struct sockaddr * __restrict)PTRIN(args->from);
 1020         bsd_args.fromlenaddr = PTRIN(args->fromlen);/* XXX */
 1021         
 1022         linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.from, len);
 1023         error = recvfrom(td, &bsd_args);
 1024         bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.from);
 1025         
 1026         if (error)
 1027                 return (error);
 1028         if (args->from) {
 1029                 error = linux_sa_put((struct osockaddr *)
 1030                     PTRIN(args->from));
 1031                 if (error)
 1032                         return (error);
 1033         }
 1034         return (0);
 1035 }
 1036 
 1037 struct linux_sendmsg_args {
 1038         int s;
 1039         l_uintptr_t msg;
 1040         int flags;
 1041 };
 1042 
 1043 static int
 1044 linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args)
 1045 {
 1046         struct cmsghdr *cmsg;
 1047         struct mbuf *control;
 1048         struct msghdr msg;
 1049         struct l_cmsghdr linux_cmsg;
 1050         struct l_cmsghdr *ptr_cmsg;
 1051         struct l_msghdr linux_msg;
 1052         struct iovec *iov;
 1053         socklen_t datalen;
 1054         void *data;
 1055         int error;
 1056 
 1057         error = copyin(PTRIN(args->msg), &linux_msg, sizeof(linux_msg));
 1058         if (error)
 1059                 return (error);
 1060         error = linux_to_bsd_msghdr(&msg, &linux_msg);
 1061         if (error)
 1062                 return (error);
 1063 
 1064         /*
 1065          * Some Linux applications (ping) define a non-NULL control data
 1066          * pointer, but a msg_controllen of 0, which is not allowed in the
 1067          * FreeBSD system call interface.  NULL the msg_control pointer in
 1068          * order to handle this case.  This should be checked, but allows the
 1069          * Linux ping to work.
 1070          */
 1071         if (msg.msg_control != NULL && msg.msg_controllen == 0)
 1072                 msg.msg_control = NULL;
 1073 
 1074 #ifdef COMPAT_LINUX32
 1075         error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen,
 1076             &iov, EMSGSIZE);
 1077 #else
 1078         error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
 1079 #endif
 1080         if (error)
 1081                 return (error);
 1082 
 1083         if (msg.msg_control != NULL) {
 1084                 error = ENOBUFS;
 1085                 cmsg = malloc(CMSG_HDRSZ, M_TEMP, M_WAITOK | M_ZERO);
 1086                 control = m_get(M_WAIT, MT_CONTROL);
 1087                 if (control == NULL)
 1088                         goto bad;
 1089                 ptr_cmsg = LINUX_CMSG_FIRSTHDR(&msg);
 1090 
 1091                 do {
 1092                         error = copyin(ptr_cmsg, &linux_cmsg,
 1093                             sizeof(struct l_cmsghdr));
 1094                         if (error)
 1095                                 goto bad;
 1096 
 1097                         error = EINVAL;
 1098                         if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr))
 1099                                 goto bad;
 1100 
 1101                         /*
 1102                          * Now we support only SCM_RIGHTS, so return EINVAL
 1103                          * in any other cmsg_type
 1104                          */
 1105                         if ((cmsg->cmsg_type =
 1106                             linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type)) == -1)
 1107                                 goto bad;
 1108                         cmsg->cmsg_level =
 1109                             linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level);
 1110 
 1111                         datalen = linux_cmsg.cmsg_len - L_CMSG_HDRSZ;
 1112                         cmsg->cmsg_len = CMSG_LEN(datalen);
 1113                         data = LINUX_CMSG_DATA(ptr_cmsg);
 1114 
 1115                         error = ENOBUFS;
 1116                         if (!m_append(control, CMSG_HDRSZ, (c_caddr_t) cmsg))
 1117                                 goto bad;
 1118                         if (!m_append(control, datalen, (c_caddr_t) data))
 1119                                 goto bad;
 1120                 } while ((ptr_cmsg = LINUX_CMSG_NXTHDR(&msg, ptr_cmsg)));
 1121         } else {
 1122                 control = NULL;
 1123                 cmsg = NULL;
 1124         }
 1125 
 1126         msg.msg_iov = iov;
 1127         msg.msg_flags = 0;
 1128         error = linux_sendit(td, args->s, &msg, args->flags, control,
 1129             UIO_USERSPACE);
 1130 
 1131 bad:
 1132         free(iov, M_IOV);
 1133         if (cmsg)
 1134                 free(cmsg, M_TEMP);
 1135         return (error);
 1136 }
 1137 
 1138 struct linux_recvmsg_args {
 1139         int s;
 1140         l_uintptr_t msg;
 1141         int flags;
 1142 };
 1143 
 1144 static int
 1145 linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args)
 1146 {
 1147         struct cmsghdr *cm;
 1148         struct msghdr msg;
 1149         struct l_cmsghdr *linux_cmsg = NULL;
 1150         socklen_t datalen, outlen, clen;
 1151         struct l_msghdr linux_msg;
 1152         struct iovec *iov, *uiov;
 1153         struct mbuf *control = NULL;
 1154         struct mbuf **controlp;
 1155         caddr_t outbuf;
 1156         void *data;
 1157         int error, i, fd, fds, *fdp;
 1158 
 1159         error = copyin(PTRIN(args->msg), &linux_msg, sizeof(linux_msg));
 1160         if (error)
 1161                 return (error);
 1162 
 1163         error = linux_to_bsd_msghdr(&msg, &linux_msg);
 1164         if (error)
 1165                 return (error);
 1166 
 1167 #ifdef COMPAT_LINUX32
 1168         error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen,
 1169             &iov, EMSGSIZE);
 1170 #else
 1171         error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
 1172 #endif
 1173         if (error)
 1174                 return (error);
 1175 
 1176         if (msg.msg_name) {
 1177                 error = linux_to_bsd_sockaddr((struct sockaddr *)msg.msg_name,
 1178                     msg.msg_namelen);
 1179                 if (error)
 1180                         goto bad;
 1181         }
 1182 
 1183         uiov = msg.msg_iov;
 1184         msg.msg_iov = iov;
 1185         controlp = (msg.msg_control != NULL) ? &control : NULL;
 1186         error = kern_recvit(td, args->s, &msg, UIO_USERSPACE, controlp);
 1187         msg.msg_iov = uiov;
 1188         if (error)
 1189                 goto bad;
 1190 
 1191         error = bsd_to_linux_msghdr(&msg, &linux_msg);
 1192         if (error)
 1193                 goto bad;
 1194 
 1195         if (linux_msg.msg_name) {
 1196                 error = bsd_to_linux_sockaddr((struct sockaddr *)
 1197                     PTRIN(linux_msg.msg_name));
 1198                 if (error)
 1199                         goto bad;
 1200         }
 1201         if (linux_msg.msg_name && linux_msg.msg_namelen > 2) {
 1202                 error = linux_sa_put(PTRIN(linux_msg.msg_name));
 1203                 if (error)
 1204                         goto bad;
 1205         }
 1206 
 1207         if (control) {
 1208 
 1209                 linux_cmsg = malloc(L_CMSG_HDRSZ, M_TEMP, M_WAITOK | M_ZERO);
 1210                 outbuf = PTRIN(linux_msg.msg_control);
 1211                 cm = mtod(control, struct cmsghdr *);
 1212                 outlen = 0;
 1213                 clen = control->m_len;
 1214 
 1215                 while (cm != NULL) {
 1216 
 1217                         if ((linux_cmsg->cmsg_type =
 1218                             bsd_to_linux_cmsg_type(cm->cmsg_type)) == -1)
 1219                         {
 1220                                 error = EINVAL;
 1221                                 goto bad;
 1222                         }
 1223                         data = CMSG_DATA(cm);
 1224                         datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data;
 1225 
 1226                         switch (linux_cmsg->cmsg_type)
 1227                         {
 1228                         case LINUX_SCM_RIGHTS:
 1229                                 if (outlen + LINUX_CMSG_LEN(datalen) >
 1230                                     linux_msg.msg_controllen) {
 1231                                         if (outlen == 0) {
 1232                                                 error = EMSGSIZE;
 1233                                                 goto bad;
 1234                                         } else {
 1235                                                 linux_msg.msg_flags |=
 1236                                                     LINUX_MSG_CTRUNC;
 1237                                                 goto out;
 1238                                         }
 1239                                 }
 1240                                 if (args->flags & LINUX_MSG_CMSG_CLOEXEC) {
 1241                                         fds = datalen / sizeof(int);
 1242                                         fdp = data;
 1243                                         for (i = 0; i < fds; i++) {
 1244                                                 fd = *fdp++;
 1245                                                 (void)kern_fcntl(td, fd,
 1246                                                     F_SETFD, FD_CLOEXEC);
 1247                                         }
 1248                                 }
 1249                                 break;
 1250                         }
 1251 
 1252                         linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen);
 1253                         linux_cmsg->cmsg_level =
 1254                             bsd_to_linux_sockopt_level(cm->cmsg_level);
 1255 
 1256                         error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ);
 1257                         if (error)
 1258                                 goto bad;
 1259                         outbuf += L_CMSG_HDRSZ;
 1260 
 1261                         error = copyout(data, outbuf, datalen);
 1262                         if (error)
 1263                                 goto bad;
 1264 
 1265                         outbuf += LINUX_CMSG_ALIGN(datalen);
 1266                         outlen += LINUX_CMSG_LEN(datalen);
 1267                         linux_msg.msg_controllen = outlen;
 1268 
 1269                         if (CMSG_SPACE(datalen) < clen) {
 1270                                 clen -= CMSG_SPACE(datalen);
 1271                                 cm = (struct cmsghdr *)
 1272                                     ((caddr_t)cm + CMSG_SPACE(datalen));
 1273                         } else
 1274                                 cm = NULL;
 1275                 }
 1276         }
 1277 
 1278 out:
 1279         error = copyout(&linux_msg, PTRIN(args->msg), sizeof(linux_msg));
 1280 
 1281 bad:
 1282         free(iov, M_IOV);
 1283         if (control != NULL)
 1284                 m_freem(control);
 1285         if (linux_cmsg != NULL)
 1286                 free(linux_cmsg, M_TEMP);
 1287 
 1288         return (error);
 1289 }
 1290 
 1291 struct linux_shutdown_args {
 1292         int s;
 1293         int how;
 1294 };
 1295 
 1296 static int
 1297 linux_shutdown(struct thread *td, struct linux_shutdown_args *args)
 1298 {
 1299         struct shutdown_args /* {
 1300                 int s;
 1301                 int how;
 1302         } */ bsd_args;
 1303 
 1304         bsd_args.s = args->s;
 1305         bsd_args.how = args->how;
 1306         return (shutdown(td, &bsd_args));
 1307 }
 1308 
 1309 struct linux_setsockopt_args {
 1310         int s;
 1311         int level;
 1312         int optname;
 1313         l_uintptr_t optval;
 1314         int optlen;
 1315 };
 1316 
 1317 static int
 1318 linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args)
 1319 {
 1320         struct setsockopt_args /* {
 1321                 int s;
 1322                 int level;
 1323                 int name;
 1324                 caddr_t val;
 1325                 int valsize;
 1326         } */ bsd_args;
 1327         l_timeval linux_tv;
 1328         struct timeval tv;
 1329         int error, name;
 1330 
 1331         bsd_args.s = args->s;
 1332         bsd_args.level = linux_to_bsd_sockopt_level(args->level);
 1333         switch (bsd_args.level) {
 1334         case SOL_SOCKET:
 1335                 name = linux_to_bsd_so_sockopt(args->optname);
 1336                 switch (name) {
 1337                 case SO_RCVTIMEO:
 1338                         /* FALLTHROUGH */
 1339                 case SO_SNDTIMEO:
 1340                         error = copyin(PTRIN(args->optval), &linux_tv,
 1341                             sizeof(linux_tv));
 1342                         if (error)
 1343                                 return (error);
 1344                         tv.tv_sec = linux_tv.tv_sec;
 1345                         tv.tv_usec = linux_tv.tv_usec;
 1346                         return (kern_setsockopt(td, args->s, bsd_args.level,
 1347                             name, &tv, UIO_SYSSPACE, sizeof(tv)));
 1348                         /* NOTREACHED */
 1349                         break;
 1350                 default:
 1351                         break;
 1352                 }
 1353                 break;
 1354         case IPPROTO_IP:
 1355                 name = linux_to_bsd_ip_sockopt(args->optname);
 1356                 break;
 1357         case IPPROTO_TCP:
 1358                 /* Linux TCP option values match BSD's */
 1359                 name = args->optname;
 1360                 break;
 1361         default:
 1362                 name = -1;
 1363                 break;
 1364         }
 1365         if (name == -1)
 1366                 return (ENOPROTOOPT);
 1367 
 1368         bsd_args.name = name;
 1369         bsd_args.val = PTRIN(args->optval);
 1370         bsd_args.valsize = args->optlen;
 1371 
 1372         if (name == IPV6_NEXTHOP) {
 1373                 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val,
 1374                         bsd_args.valsize);
 1375                 error = setsockopt(td, &bsd_args);
 1376                 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val);
 1377         } else
 1378                 error = setsockopt(td, &bsd_args);
 1379 
 1380         return (error);
 1381 }
 1382 
 1383 struct linux_getsockopt_args {
 1384         int s;
 1385         int level;
 1386         int optname;
 1387         l_uintptr_t optval;
 1388         l_uintptr_t optlen;
 1389 };
 1390 
 1391 static int
 1392 linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args)
 1393 {
 1394         struct getsockopt_args /* {
 1395                 int s;
 1396                 int level;
 1397                 int name;
 1398                 caddr_t val;
 1399                 int *avalsize;
 1400         } */ bsd_args;
 1401         l_timeval linux_tv;
 1402         struct timeval tv;
 1403         socklen_t tv_len, xulen;
 1404         struct xucred xu;
 1405         struct l_ucred lxu;
 1406         int error, name;
 1407 
 1408         bsd_args.s = args->s;
 1409         bsd_args.level = linux_to_bsd_sockopt_level(args->level);
 1410         switch (bsd_args.level) {
 1411         case SOL_SOCKET:
 1412                 name = linux_to_bsd_so_sockopt(args->optname);
 1413                 switch (name) {
 1414                 case SO_RCVTIMEO:
 1415                         /* FALLTHROUGH */
 1416                 case SO_SNDTIMEO:
 1417                         tv_len = sizeof(tv);
 1418                         error = kern_getsockopt(td, args->s, bsd_args.level,
 1419                             name, &tv, UIO_SYSSPACE, &tv_len);
 1420                         if (error)
 1421                                 return (error);
 1422                         linux_tv.tv_sec = tv.tv_sec;
 1423                         linux_tv.tv_usec = tv.tv_usec;
 1424                         return (copyout(&linux_tv, PTRIN(args->optval),
 1425                             sizeof(linux_tv)));
 1426                         /* NOTREACHED */
 1427                         break;
 1428                 case LOCAL_PEERCRED:
 1429                         if (args->optlen != sizeof(lxu))
 1430                                 return (EINVAL);
 1431                         xulen = sizeof(xu);
 1432                         error = kern_getsockopt(td, args->s, bsd_args.level,
 1433                             name, &xu, UIO_SYSSPACE, &xulen);
 1434                         if (error)
 1435                                 return (error);
 1436                         /*
 1437                          * XXX Use 0 for pid as the FreeBSD does not cache peer pid.
 1438                          */
 1439                         lxu.pid = 0;
 1440                         lxu.uid = xu.cr_uid;
 1441                         lxu.gid = xu.cr_gid;
 1442                         return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu)));
 1443                         /* NOTREACHED */
 1444                         break;
 1445                 default:
 1446                         break;
 1447                 }
 1448                 break;
 1449         case IPPROTO_IP:
 1450                 name = linux_to_bsd_ip_sockopt(args->optname);
 1451                 break;
 1452         case IPPROTO_TCP:
 1453                 /* Linux TCP option values match BSD's */
 1454                 name = args->optname;
 1455                 break;
 1456         default:
 1457                 name = -1;
 1458                 break;
 1459         }
 1460         if (name == -1)
 1461                 return (EINVAL);
 1462 
 1463         bsd_args.name = name;
 1464         bsd_args.val = PTRIN(args->optval);
 1465         bsd_args.avalsize = PTRIN(args->optlen);
 1466 
 1467         if (name == IPV6_NEXTHOP) {
 1468                 error = getsockopt(td, &bsd_args);
 1469                 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val);
 1470         } else
 1471                 error = getsockopt(td, &bsd_args);
 1472 
 1473         return (error);
 1474 }
 1475 
 1476 /* Argument list sizes for linux_socketcall */
 1477 
 1478 #define LINUX_AL(x) ((x) * sizeof(l_ulong))
 1479 
 1480 static const unsigned char lxs_args[] = {
 1481         LINUX_AL(0) /* unused*/,        LINUX_AL(3) /* socket */,
 1482         LINUX_AL(3) /* bind */,         LINUX_AL(3) /* connect */,
 1483         LINUX_AL(2) /* listen */,       LINUX_AL(3) /* accept */,
 1484         LINUX_AL(3) /* getsockname */,  LINUX_AL(3) /* getpeername */,
 1485         LINUX_AL(4) /* socketpair */,   LINUX_AL(4) /* send */,
 1486         LINUX_AL(4) /* recv */,         LINUX_AL(6) /* sendto */,
 1487         LINUX_AL(6) /* recvfrom */,     LINUX_AL(2) /* shutdown */,
 1488         LINUX_AL(5) /* setsockopt */,   LINUX_AL(5) /* getsockopt */,
 1489         LINUX_AL(3) /* sendmsg */,      LINUX_AL(3) /* recvmsg */
 1490 };
 1491 
 1492 #define LINUX_AL_SIZE   sizeof(lxs_args) / sizeof(lxs_args[0]) - 1
 1493 
 1494 int
 1495 linux_socketcall(struct thread *td, struct linux_socketcall_args *args)
 1496 {
 1497         l_ulong a[6];
 1498         void *arg;
 1499         int error;
 1500 
 1501         if (args->what < LINUX_SOCKET || args->what > LINUX_AL_SIZE)
 1502                 return (EINVAL);
 1503         error = copyin(PTRIN(args->args), a, lxs_args[args->what]);
 1504         if (error)
 1505                 return (error);
 1506 
 1507         arg = a;
 1508         switch (args->what) {
 1509         case LINUX_SOCKET:
 1510                 return (linux_socket(td, arg));
 1511         case LINUX_BIND:
 1512                 return (linux_bind(td, arg));
 1513         case LINUX_CONNECT:
 1514                 return (linux_connect(td, arg));
 1515         case LINUX_LISTEN:
 1516                 return (linux_listen(td, arg));
 1517         case LINUX_ACCEPT:
 1518                 return (linux_accept(td, arg));
 1519         case LINUX_GETSOCKNAME:
 1520                 return (linux_getsockname(td, arg));
 1521         case LINUX_GETPEERNAME:
 1522                 return (linux_getpeername(td, arg));
 1523         case LINUX_SOCKETPAIR:
 1524                 return (linux_socketpair(td, arg));
 1525         case LINUX_SEND:
 1526                 return (linux_send(td, arg));
 1527         case LINUX_RECV:
 1528                 return (linux_recv(td, arg));
 1529         case LINUX_SENDTO:
 1530                 return (linux_sendto(td, arg));
 1531         case LINUX_RECVFROM:
 1532                 return (linux_recvfrom(td, arg));
 1533         case LINUX_SHUTDOWN:
 1534                 return (linux_shutdown(td, arg));
 1535         case LINUX_SETSOCKOPT:
 1536                 return (linux_setsockopt(td, arg));
 1537         case LINUX_GETSOCKOPT:
 1538                 return (linux_getsockopt(td, arg));
 1539         case LINUX_SENDMSG:
 1540                 return (linux_sendmsg(td, arg));
 1541         case LINUX_RECVMSG:
 1542                 return (linux_recvmsg(td, arg));
 1543         }
 1544 
 1545         uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what);
 1546         return (ENOSYS);
 1547 }
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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
