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


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

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

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    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/capsicum.h>
   41 #include <sys/fcntl.h>
   42 #include <sys/file.h>
   43 #include <sys/limits.h>
   44 #include <sys/lock.h>
   45 #include <sys/malloc.h>
   46 #include <sys/mutex.h>
   47 #include <sys/mbuf.h>
   48 #include <sys/socket.h>
   49 #include <sys/socketvar.h>
   50 #include <sys/syscallsubr.h>
   51 #include <sys/uio.h>
   52 #include <sys/syslog.h>
   53 #include <sys/un.h>
   54 
   55 #include <net/if.h>
   56 #include <netinet/in.h>
   57 #include <netinet/in_systm.h>
   58 #include <netinet/ip.h>
   59 #include <netinet/tcp.h>
   60 #ifdef INET6
   61 #include <netinet/ip6.h>
   62 #include <netinet6/ip6_var.h>
   63 #include <netinet6/in6_var.h>
   64 #endif
   65 
   66 #ifdef COMPAT_LINUX32
   67 #include <machine/../linux32/linux.h>
   68 #include <machine/../linux32/linux32_proto.h>
   69 #else
   70 #include <machine/../linux/linux.h>
   71 #include <machine/../linux/linux_proto.h>
   72 #endif
   73 #include <compat/linux/linux_file.h>
   74 #include <compat/linux/linux_socket.h>
   75 #include <compat/linux/linux_timer.h>
   76 #include <compat/linux/linux_util.h>
   77 
   78 static int linux_to_bsd_domain(int);
   79 static int linux_sendmsg_common(struct thread *, l_int, struct l_msghdr *,
   80                                         l_uint);
   81 static int linux_recvmsg_common(struct thread *, l_int, struct l_msghdr *,
   82                                         l_uint, struct msghdr *);
   83 static int linux_set_socket_flags(int, int *);
   84 
   85 /*
   86  * Reads a linux sockaddr and does any necessary translation.
   87  * Linux sockaddrs don't have a length field, only a family.
   88  * Copy the osockaddr structure pointed to by osa to kernel, adjust
   89  * family and convert to sockaddr.
   90  */
   91 static int
   92 linux_getsockaddr(struct sockaddr **sap, const struct osockaddr *osa, int salen)
   93 {
   94         struct sockaddr *sa;
   95         struct osockaddr *kosa;
   96 #ifdef INET6
   97         struct sockaddr_in6 *sin6;
   98         int oldv6size;
   99 #endif
  100         char *name;
  101         int bdom, error, hdrlen, namelen;
  102 
  103         if (salen < 2 || salen > UCHAR_MAX || !osa)
  104                 return (EINVAL);
  105 
  106 #ifdef INET6
  107         oldv6size = 0;
  108         /*
  109          * Check for old (pre-RFC2553) sockaddr_in6. We may accept it
  110          * if it's a v4-mapped address, so reserve the proper space
  111          * for it.
  112          */
  113         if (salen == sizeof(struct sockaddr_in6) - sizeof(uint32_t)) {
  114                 salen += sizeof(uint32_t);
  115                 oldv6size = 1;
  116         }
  117 #endif
  118 
  119         kosa = malloc(salen, M_SONAME, M_WAITOK);
  120 
  121         if ((error = copyin(osa, kosa, salen)))
  122                 goto out;
  123 
  124         bdom = linux_to_bsd_domain(kosa->sa_family);
  125         if (bdom == -1) {
  126                 error = EAFNOSUPPORT;
  127                 goto out;
  128         }
  129 
  130 #ifdef INET6
  131         /*
  132          * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6,
  133          * which lacks the scope id compared with RFC2553 one. If we detect
  134          * the situation, reject the address and write a message to system log.
  135          *
  136          * Still accept addresses for which the scope id is not used.
  137          */
  138         if (oldv6size) {
  139                 if (bdom == AF_INET6) {
  140                         sin6 = (struct sockaddr_in6 *)kosa;
  141                         if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) ||
  142                             (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
  143                              !IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
  144                              !IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) &&
  145                              !IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
  146                              !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) {
  147                                 sin6->sin6_scope_id = 0;
  148                         } else {
  149                                 log(LOG_DEBUG,
  150                                     "obsolete pre-RFC2553 sockaddr_in6 rejected\n");
  151                                 error = EINVAL;
  152                                 goto out;
  153                         }
  154                 } else
  155                         salen -= sizeof(uint32_t);
  156         }
  157 #endif
  158         if (bdom == AF_INET) {
  159                 if (salen < sizeof(struct sockaddr_in)) {
  160                         error = EINVAL;
  161                         goto out;
  162                 }
  163                 salen = sizeof(struct sockaddr_in);
  164         }
  165 
  166         if (bdom == AF_LOCAL && salen > sizeof(struct sockaddr_un)) {
  167                 hdrlen = offsetof(struct sockaddr_un, sun_path);
  168                 name = ((struct sockaddr_un *)kosa)->sun_path;
  169                 if (*name == '\0') {
  170                         /*
  171                          * Linux abstract namespace starts with a NULL byte.
  172                          * XXX We do not support abstract namespace yet.
  173                          */
  174                         namelen = strnlen(name + 1, salen - hdrlen - 1) + 1;
  175                 } else
  176                         namelen = strnlen(name, salen - hdrlen);
  177                 salen = hdrlen + namelen;
  178                 if (salen > sizeof(struct sockaddr_un)) {
  179                         error = ENAMETOOLONG;
  180                         goto out;
  181                 }
  182         }
  183 
  184         sa = (struct sockaddr *)kosa;
  185         sa->sa_family = bdom;
  186         sa->sa_len = salen;
  187 
  188         *sap = sa;
  189         return (0);
  190 
  191 out:
  192         free(kosa, M_SONAME);
  193         return (error);
  194 }
  195 
  196 static int
  197 linux_to_bsd_domain(int domain)
  198 {
  199 
  200         switch (domain) {
  201         case LINUX_AF_UNSPEC:
  202                 return (AF_UNSPEC);
  203         case LINUX_AF_UNIX:
  204                 return (AF_LOCAL);
  205         case LINUX_AF_INET:
  206                 return (AF_INET);
  207         case LINUX_AF_INET6:
  208                 return (AF_INET6);
  209         case LINUX_AF_AX25:
  210                 return (AF_CCITT);
  211         case LINUX_AF_IPX:
  212                 return (AF_IPX);
  213         case LINUX_AF_APPLETALK:
  214                 return (AF_APPLETALK);
  215         }
  216         return (-1);
  217 }
  218 
  219 static int
  220 bsd_to_linux_domain(int domain)
  221 {
  222 
  223         switch (domain) {
  224         case AF_UNSPEC:
  225                 return (LINUX_AF_UNSPEC);
  226         case AF_LOCAL:
  227                 return (LINUX_AF_UNIX);
  228         case AF_INET:
  229                 return (LINUX_AF_INET);
  230         case AF_INET6:
  231                 return (LINUX_AF_INET6);
  232         case AF_CCITT:
  233                 return (LINUX_AF_AX25);
  234         case AF_IPX:
  235                 return (LINUX_AF_IPX);
  236         case AF_APPLETALK:
  237                 return (LINUX_AF_APPLETALK);
  238         }
  239         return (-1);
  240 }
  241 
  242 static int
  243 linux_to_bsd_sockopt_level(int level)
  244 {
  245 
  246         switch (level) {
  247         case LINUX_SOL_SOCKET:
  248                 return (SOL_SOCKET);
  249         }
  250         return (level);
  251 }
  252 
  253 static int
  254 bsd_to_linux_sockopt_level(int level)
  255 {
  256 
  257         switch (level) {
  258         case SOL_SOCKET:
  259                 return (LINUX_SOL_SOCKET);
  260         }
  261         return (level);
  262 }
  263 
  264 static int
  265 linux_to_bsd_ip_sockopt(int opt)
  266 {
  267 
  268         switch (opt) {
  269         case LINUX_IP_TOS:
  270                 return (IP_TOS);
  271         case LINUX_IP_TTL:
  272                 return (IP_TTL);
  273         case LINUX_IP_OPTIONS:
  274                 return (IP_OPTIONS);
  275         case LINUX_IP_MULTICAST_IF:
  276                 return (IP_MULTICAST_IF);
  277         case LINUX_IP_MULTICAST_TTL:
  278                 return (IP_MULTICAST_TTL);
  279         case LINUX_IP_MULTICAST_LOOP:
  280                 return (IP_MULTICAST_LOOP);
  281         case LINUX_IP_ADD_MEMBERSHIP:
  282                 return (IP_ADD_MEMBERSHIP);
  283         case LINUX_IP_DROP_MEMBERSHIP:
  284                 return (IP_DROP_MEMBERSHIP);
  285         case LINUX_IP_HDRINCL:
  286                 return (IP_HDRINCL);
  287         }
  288         return (-1);
  289 }
  290 
  291 static int
  292 linux_to_bsd_ip6_sockopt(int opt)
  293 {
  294 
  295         switch (opt) {
  296         case LINUX_IPV6_NEXTHOP:
  297                 return (IPV6_NEXTHOP);
  298         case LINUX_IPV6_UNICAST_HOPS:
  299                 return (IPV6_UNICAST_HOPS);
  300         case LINUX_IPV6_MULTICAST_IF:
  301                 return (IPV6_MULTICAST_IF);
  302         case LINUX_IPV6_MULTICAST_HOPS:
  303                 return (IPV6_MULTICAST_HOPS);
  304         case LINUX_IPV6_MULTICAST_LOOP:
  305                 return (IPV6_MULTICAST_LOOP);
  306         case LINUX_IPV6_ADD_MEMBERSHIP:
  307                 return (IPV6_JOIN_GROUP);
  308         case LINUX_IPV6_DROP_MEMBERSHIP:
  309                 return (IPV6_LEAVE_GROUP);
  310         case LINUX_IPV6_V6ONLY:
  311                 return (IPV6_V6ONLY);
  312         case LINUX_IPV6_DONTFRAG:
  313                 return (IPV6_DONTFRAG);
  314 #if 0
  315         case LINUX_IPV6_CHECKSUM:
  316                 return (IPV6_CHECKSUM);
  317         case LINUX_IPV6_RECVPKTINFO:
  318                 return (IPV6_RECVPKTINFO);
  319         case LINUX_IPV6_PKTINFO:
  320                 return (IPV6_PKTINFO);
  321         case LINUX_IPV6_RECVHOPLIMIT:
  322                 return (IPV6_RECVHOPLIMIT);
  323         case LINUX_IPV6_HOPLIMIT:
  324                 return (IPV6_HOPLIMIT);
  325         case LINUX_IPV6_RECVHOPOPTS:
  326                 return (IPV6_RECVHOPOPTS);
  327         case LINUX_IPV6_HOPOPTS:
  328                 return (IPV6_HOPOPTS);
  329         case LINUX_IPV6_RTHDRDSTOPTS:
  330                 return (IPV6_RTHDRDSTOPTS);
  331         case LINUX_IPV6_RECVRTHDR:
  332                 return (IPV6_RECVRTHDR);
  333         case LINUX_IPV6_RTHDR:
  334                 return (IPV6_RTHDR);
  335         case LINUX_IPV6_RECVDSTOPTS:
  336                 return (IPV6_RECVDSTOPTS);
  337         case LINUX_IPV6_DSTOPTS:
  338                 return (IPV6_DSTOPTS);
  339         case LINUX_IPV6_RECVPATHMTU:
  340                 return (IPV6_RECVPATHMTU);
  341         case LINUX_IPV6_PATHMTU:
  342                 return (IPV6_PATHMTU);
  343 #endif
  344         }
  345         return (-1);
  346 }
  347 
  348 static int
  349 linux_to_bsd_so_sockopt(int opt)
  350 {
  351 
  352         switch (opt) {
  353         case LINUX_SO_DEBUG:
  354                 return (SO_DEBUG);
  355         case LINUX_SO_REUSEADDR:
  356                 return (SO_REUSEADDR);
  357         case LINUX_SO_TYPE:
  358                 return (SO_TYPE);
  359         case LINUX_SO_ERROR:
  360                 return (SO_ERROR);
  361         case LINUX_SO_DONTROUTE:
  362                 return (SO_DONTROUTE);
  363         case LINUX_SO_BROADCAST:
  364                 return (SO_BROADCAST);
  365         case LINUX_SO_SNDBUF:
  366                 return (SO_SNDBUF);
  367         case LINUX_SO_RCVBUF:
  368                 return (SO_RCVBUF);
  369         case LINUX_SO_KEEPALIVE:
  370                 return (SO_KEEPALIVE);
  371         case LINUX_SO_OOBINLINE:
  372                 return (SO_OOBINLINE);
  373         case LINUX_SO_LINGER:
  374                 return (SO_LINGER);
  375         case LINUX_SO_PEERCRED:
  376                 return (LOCAL_PEERCRED);
  377         case LINUX_SO_RCVLOWAT:
  378                 return (SO_RCVLOWAT);
  379         case LINUX_SO_SNDLOWAT:
  380                 return (SO_SNDLOWAT);
  381         case LINUX_SO_RCVTIMEO:
  382                 return (SO_RCVTIMEO);
  383         case LINUX_SO_SNDTIMEO:
  384                 return (SO_SNDTIMEO);
  385         case LINUX_SO_TIMESTAMP:
  386                 return (SO_TIMESTAMP);
  387         case LINUX_SO_ACCEPTCONN:
  388                 return (SO_ACCEPTCONN);
  389         }
  390         return (-1);
  391 }
  392 
  393 static int
  394 linux_to_bsd_tcp_sockopt(int opt)
  395 {
  396 
  397         switch (opt) {
  398         case LINUX_TCP_NODELAY:
  399                 return (TCP_NODELAY);
  400         case LINUX_TCP_MAXSEG:
  401                 return (TCP_MAXSEG);
  402         case LINUX_TCP_KEEPIDLE:
  403                 return (TCP_KEEPIDLE);
  404         case LINUX_TCP_KEEPINTVL:
  405                 return (TCP_KEEPINTVL);
  406         case LINUX_TCP_KEEPCNT:
  407                 return (TCP_KEEPCNT);
  408         case LINUX_TCP_MD5SIG:
  409                 return (TCP_MD5SIG);
  410         }
  411         return (-1);
  412 }
  413 
  414 static int
  415 linux_to_bsd_msg_flags(int flags)
  416 {
  417         int ret_flags = 0;
  418 
  419         if (flags & LINUX_MSG_OOB)
  420                 ret_flags |= MSG_OOB;
  421         if (flags & LINUX_MSG_PEEK)
  422                 ret_flags |= MSG_PEEK;
  423         if (flags & LINUX_MSG_DONTROUTE)
  424                 ret_flags |= MSG_DONTROUTE;
  425         if (flags & LINUX_MSG_CTRUNC)
  426                 ret_flags |= MSG_CTRUNC;
  427         if (flags & LINUX_MSG_TRUNC)
  428                 ret_flags |= MSG_TRUNC;
  429         if (flags & LINUX_MSG_DONTWAIT)
  430                 ret_flags |= MSG_DONTWAIT;
  431         if (flags & LINUX_MSG_EOR)
  432                 ret_flags |= MSG_EOR;
  433         if (flags & LINUX_MSG_WAITALL)
  434                 ret_flags |= MSG_WAITALL;
  435         if (flags & LINUX_MSG_NOSIGNAL)
  436                 ret_flags |= MSG_NOSIGNAL;
  437 #if 0 /* not handled */
  438         if (flags & LINUX_MSG_PROXY)
  439                 ;
  440         if (flags & LINUX_MSG_FIN)
  441                 ;
  442         if (flags & LINUX_MSG_SYN)
  443                 ;
  444         if (flags & LINUX_MSG_CONFIRM)
  445                 ;
  446         if (flags & LINUX_MSG_RST)
  447                 ;
  448         if (flags & LINUX_MSG_ERRQUEUE)
  449                 ;
  450 #endif
  451         return (ret_flags);
  452 }
  453 
  454 /*
  455 * If bsd_to_linux_sockaddr() or linux_to_bsd_sockaddr() faults, then the
  456 * native syscall will fault.  Thus, we don't really need to check the
  457 * return values for these functions.
  458 */
  459 
  460 static int
  461 bsd_to_linux_sockaddr(struct sockaddr *arg)
  462 {
  463         struct sockaddr sa;
  464         size_t sa_len = sizeof(struct sockaddr);
  465         int error, bdom;
  466 
  467         if ((error = copyin(arg, &sa, sa_len)))
  468                 return (error);
  469 
  470         bdom = bsd_to_linux_domain(sa.sa_family);
  471         if (bdom == -1)
  472                 return (EAFNOSUPPORT);
  473 
  474         *(u_short *)&sa = bdom;
  475         return (copyout(&sa, arg, sa_len));
  476 }
  477 
  478 static int
  479 linux_to_bsd_sockaddr(struct sockaddr *arg, int len)
  480 {
  481         struct sockaddr sa;
  482         size_t sa_len = sizeof(struct sockaddr);
  483         int error, bdom;
  484 
  485         if ((error = copyin(arg, &sa, sa_len)))
  486                 return (error);
  487 
  488         bdom = linux_to_bsd_domain(*(sa_family_t *)&sa);
  489         if (bdom == -1)
  490                 return (EAFNOSUPPORT);
  491 
  492         sa.sa_family = bdom;
  493         sa.sa_len = len;
  494         return (copyout(&sa, arg, sa_len));
  495 }
  496 
  497 static int
  498 linux_sa_put(struct osockaddr *osa)
  499 {
  500         struct osockaddr sa;
  501         int error, bdom;
  502 
  503         /*
  504          * Only read/write the osockaddr family part, the rest is
  505          * not changed.
  506          */
  507         error = copyin(osa, &sa, sizeof(sa.sa_family));
  508         if (error)
  509                 return (error);
  510 
  511         bdom = bsd_to_linux_domain(sa.sa_family);
  512         if (bdom == -1)
  513                 return (EINVAL);
  514 
  515         sa.sa_family = bdom;
  516         return (copyout(&sa, osa, sizeof(sa.sa_family)));
  517 }
  518 
  519 static int
  520 linux_to_bsd_cmsg_type(int cmsg_type)
  521 {
  522 
  523         switch (cmsg_type) {
  524         case LINUX_SCM_RIGHTS:
  525                 return (SCM_RIGHTS);
  526         case LINUX_SCM_CREDENTIALS:
  527                 return (SCM_CREDS);
  528         }
  529         return (-1);
  530 }
  531 
  532 static int
  533 bsd_to_linux_cmsg_type(int cmsg_type)
  534 {
  535 
  536         switch (cmsg_type) {
  537         case SCM_RIGHTS:
  538                 return (LINUX_SCM_RIGHTS);
  539         case SCM_CREDS:
  540                 return (LINUX_SCM_CREDENTIALS);
  541         case SCM_TIMESTAMP:
  542                 return (LINUX_SCM_TIMESTAMP);
  543         }
  544         return (-1);
  545 }
  546 
  547 static int
  548 linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr)
  549 {
  550         if (lhdr->msg_controllen > INT_MAX)
  551                 return (ENOBUFS);
  552 
  553         bhdr->msg_name          = PTRIN(lhdr->msg_name);
  554         bhdr->msg_namelen       = lhdr->msg_namelen;
  555         bhdr->msg_iov           = PTRIN(lhdr->msg_iov);
  556         bhdr->msg_iovlen        = lhdr->msg_iovlen;
  557         bhdr->msg_control       = PTRIN(lhdr->msg_control);
  558 
  559         /*
  560          * msg_controllen is skipped since BSD and LINUX control messages
  561          * are potentially different sizes (e.g. the cred structure used
  562          * by SCM_CREDS is different between the two operating system).
  563          *
  564          * The caller can set it (if necessary) after converting all the
  565          * control messages.
  566          */
  567 
  568         bhdr->msg_flags         = linux_to_bsd_msg_flags(lhdr->msg_flags);
  569         return (0);
  570 }
  571 
  572 static int
  573 bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr)
  574 {
  575         lhdr->msg_name          = PTROUT(bhdr->msg_name);
  576         lhdr->msg_namelen       = bhdr->msg_namelen;
  577         lhdr->msg_iov           = PTROUT(bhdr->msg_iov);
  578         lhdr->msg_iovlen        = bhdr->msg_iovlen;
  579         lhdr->msg_control       = PTROUT(bhdr->msg_control);
  580 
  581         /*
  582          * msg_controllen is skipped since BSD and LINUX control messages
  583          * are potentially different sizes (e.g. the cred structure used
  584          * by SCM_CREDS is different between the two operating system).
  585          *
  586          * The caller can set it (if necessary) after converting all the
  587          * control messages.
  588          */
  589 
  590         /* msg_flags skipped */
  591         return (0);
  592 }
  593 
  594 static int
  595 linux_set_socket_flags(int lflags, int *flags)
  596 {
  597 
  598         if (lflags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK))
  599                 return (EINVAL);
  600         if (lflags & LINUX_SOCK_NONBLOCK)
  601                 *flags |= SOCK_NONBLOCK;
  602         if (lflags & LINUX_SOCK_CLOEXEC)
  603                 *flags |= SOCK_CLOEXEC;
  604         return (0);
  605 }
  606 
  607 static int
  608 linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags,
  609     struct mbuf *control, enum uio_seg segflg)
  610 {
  611         struct sockaddr *to;
  612         int error;
  613 
  614         if (mp->msg_name != NULL) {
  615                 error = linux_getsockaddr(&to, mp->msg_name, mp->msg_namelen);
  616                 if (error)
  617                         return (error);
  618                 mp->msg_name = to;
  619         } else
  620                 to = NULL;
  621 
  622         error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control,
  623             segflg);
  624 
  625         if (to)
  626                 free(to, M_SONAME);
  627         return (error);
  628 }
  629 
  630 /* Return 0 if IP_HDRINCL is set for the given socket. */
  631 static int
  632 linux_check_hdrincl(struct thread *td, int s)
  633 {
  634         int error, optval;
  635         socklen_t size_val;
  636 
  637         size_val = sizeof(optval);
  638         error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL,
  639             &optval, UIO_SYSSPACE, &size_val);
  640         if (error)
  641                 return (error);
  642 
  643         return (optval == 0);
  644 }
  645 
  646 /*
  647  * Updated sendto() when IP_HDRINCL is set:
  648  * tweak endian-dependent fields in the IP packet.
  649  */
  650 static int
  651 linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args)
  652 {
  653 /*
  654  * linux_ip_copysize defines how many bytes we should copy
  655  * from the beginning of the IP packet before we customize it for BSD.
  656  * It should include all the fields we modify (ip_len and ip_off).
  657  */
  658 #define linux_ip_copysize       8
  659 
  660         struct ip *packet;
  661         struct msghdr msg;
  662         struct iovec aiov[1];
  663         int error;
  664 
  665         /* Check that the packet isn't too big or too small. */
  666         if (linux_args->len < linux_ip_copysize ||
  667             linux_args->len > IP_MAXPACKET)
  668                 return (EINVAL);
  669 
  670         packet = (struct ip *)malloc(linux_args->len, M_LINUX, M_WAITOK);
  671 
  672         /* Make kernel copy of the packet to be sent */
  673         if ((error = copyin(PTRIN(linux_args->msg), packet,
  674             linux_args->len)))
  675                 goto goout;
  676 
  677         /* Convert fields from Linux to BSD raw IP socket format */
  678         packet->ip_len = linux_args->len;
  679         packet->ip_off = ntohs(packet->ip_off);
  680 
  681         /* Prepare the msghdr and iovec structures describing the new packet */
  682         msg.msg_name = PTRIN(linux_args->to);
  683         msg.msg_namelen = linux_args->tolen;
  684         msg.msg_iov = aiov;
  685         msg.msg_iovlen = 1;
  686         msg.msg_control = NULL;
  687         msg.msg_flags = 0;
  688         aiov[0].iov_base = (char *)packet;
  689         aiov[0].iov_len = linux_args->len;
  690         error = linux_sendit(td, linux_args->s, &msg, linux_args->flags,
  691             NULL, UIO_SYSSPACE);
  692 goout:
  693         free(packet, M_LINUX);
  694         return (error);
  695 }
  696 
  697 int
  698 linux_socket(struct thread *td, struct linux_socket_args *args)
  699 {
  700         struct socket_args /* {
  701                 int domain;
  702                 int type;
  703                 int protocol;
  704         } */ bsd_args;
  705         int retval_socket;
  706 
  707         bsd_args.protocol = args->protocol;
  708         bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK;
  709         if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX)
  710                 return (EINVAL);
  711         retval_socket = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK,
  712                 &bsd_args.type);
  713         if (retval_socket != 0)
  714                 return (retval_socket);
  715         bsd_args.domain = linux_to_bsd_domain(args->domain);
  716         if (bsd_args.domain == -1)
  717                 return (EAFNOSUPPORT);
  718 
  719         retval_socket = sys_socket(td, &bsd_args);
  720         if (retval_socket)
  721                 return (retval_socket);
  722 
  723         if (bsd_args.type == SOCK_RAW
  724             && (bsd_args.protocol == IPPROTO_RAW || bsd_args.protocol == 0)
  725             && bsd_args.domain == PF_INET) {
  726                 /* It's a raw IP socket: set the IP_HDRINCL option. */
  727                 int hdrincl;
  728 
  729                 hdrincl = 1;
  730                 /* We ignore any error returned by kern_setsockopt() */
  731                 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL,
  732                     &hdrincl, UIO_SYSSPACE, sizeof(hdrincl));
  733         }
  734 #ifdef INET6
  735         /*
  736          * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default
  737          * and some apps depend on this. So, set V6ONLY to 0 for Linux apps.
  738          * For simplicity we do this unconditionally of the net.inet6.ip6.v6only
  739          * sysctl value.
  740          */
  741         if (bsd_args.domain == PF_INET6) {
  742                 int v6only;
  743 
  744                 v6only = 0;
  745                 /* We ignore any error returned by setsockopt() */
  746                 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY,
  747                     &v6only, UIO_SYSSPACE, sizeof(v6only));
  748         }
  749 #endif
  750 
  751         return (retval_socket);
  752 }
  753 
  754 int
  755 linux_bind(struct thread *td, struct linux_bind_args *args)
  756 {
  757         struct sockaddr *sa;
  758         int error;
  759 
  760         error = linux_getsockaddr(&sa, PTRIN(args->name),
  761             args->namelen);
  762         if (error)
  763                 return (error);
  764 
  765         error = kern_bind(td, args->s, sa);
  766         free(sa, M_SONAME);
  767         if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in))
  768                 return (EINVAL);
  769         return (error);
  770 }
  771 
  772 int
  773 linux_connect(struct thread *td, struct linux_connect_args *args)
  774 {
  775         cap_rights_t rights;
  776         struct socket *so;
  777         struct sockaddr *sa;
  778         u_int fflag;
  779         int error;
  780 
  781         error = linux_getsockaddr(&sa, (struct osockaddr *)PTRIN(args->name),
  782             args->namelen);
  783         if (error)
  784                 return (error);
  785 
  786         error = kern_connect(td, args->s, sa);
  787         free(sa, M_SONAME);
  788         if (error != EISCONN)
  789                 return (error);
  790 
  791         /*
  792          * Linux doesn't return EISCONN the first time it occurs,
  793          * when on a non-blocking socket. Instead it returns the
  794          * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD.
  795          *
  796          * XXXRW: Instead of using fgetsock(), check that it is a
  797          * socket and use the file descriptor reference instead of
  798          * creating a new one.
  799          */
  800         error = fgetsock(td, args->s, cap_rights_init(&rights, CAP_CONNECT),
  801             &so, &fflag);
  802         if (error == 0) {
  803                 error = EISCONN;
  804                 if (fflag & FNONBLOCK) {
  805                         SOCK_LOCK(so);
  806                         if (so->so_emuldata == 0)
  807                                 error = so->so_error;
  808                         so->so_emuldata = (void *)1;
  809                         SOCK_UNLOCK(so);
  810                 }
  811                 fputsock(so);
  812         }
  813         return (error);
  814 }
  815 
  816 int
  817 linux_listen(struct thread *td, struct linux_listen_args *args)
  818 {
  819         struct listen_args /* {
  820                 int s;
  821                 int backlog;
  822         } */ bsd_args;
  823 
  824         bsd_args.s = args->s;
  825         bsd_args.backlog = args->backlog;
  826         return (sys_listen(td, &bsd_args));
  827 }
  828 
  829 static int
  830 linux_accept_common(struct thread *td, int s, l_uintptr_t addr,
  831     l_uintptr_t namelen, int flags)
  832 {
  833         struct accept4_args /* {
  834                 int     s;
  835                 struct sockaddr * __restrict name;
  836                 socklen_t * __restrict anamelen;
  837                 int     flags;
  838         } */ bsd_args;
  839         cap_rights_t rights;
  840         struct socket *so;
  841         struct file *fp;
  842         int error, error1;
  843 
  844         bsd_args.s = s;
  845         /* XXX: */
  846         bsd_args.name = (struct sockaddr * __restrict)PTRIN(addr);
  847         bsd_args.anamelen = PTRIN(namelen);/* XXX */
  848         bsd_args.flags = 0;
  849         error = linux_set_socket_flags(flags, &bsd_args.flags);
  850         if (error != 0)
  851                 return (error);
  852         error = sys_accept4(td, &bsd_args);
  853         bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.name);
  854         if (error) {
  855                 if (error == EFAULT && namelen != sizeof(struct sockaddr_in))
  856                         return (EINVAL);
  857                 if (error == EINVAL) {
  858                         error1 = getsock_cap(td, s,
  859                             cap_rights_init(&rights, CAP_ACCEPT), &fp, NULL);
  860                         if (error1 != 0)
  861                                 return (error1);
  862                         so = fp->f_data;
  863                         if (so->so_type == SOCK_DGRAM) {
  864                                 fdrop(fp, td);
  865                                 return (EOPNOTSUPP);
  866                         }
  867                         fdrop(fp, td);
  868                 }
  869                 return (error);
  870         }
  871         if (addr)
  872                 error = linux_sa_put(PTRIN(addr));
  873         if (error) {
  874                 (void)kern_close(td, td->td_retval[0]);
  875                 td->td_retval[0] = 0;
  876         }
  877         return (error);
  878 }
  879 
  880 int
  881 linux_accept(struct thread *td, struct linux_accept_args *args)
  882 {
  883 
  884         return (linux_accept_common(td, args->s, args->addr,
  885             args->namelen, 0));
  886 }
  887 
  888 int
  889 linux_accept4(struct thread *td, struct linux_accept4_args *args)
  890 {
  891 
  892         return (linux_accept_common(td, args->s, args->addr,
  893             args->namelen, args->flags));
  894 }
  895 
  896 int
  897 linux_getsockname(struct thread *td, struct linux_getsockname_args *args)
  898 {
  899         struct getsockname_args /* {
  900                 int     fdes;
  901                 struct sockaddr * __restrict asa;
  902                 socklen_t * __restrict alen;
  903         } */ bsd_args;
  904         int error;
  905 
  906         bsd_args.fdes = args->s;
  907         /* XXX: */
  908         bsd_args.asa = (struct sockaddr * __restrict)PTRIN(args->addr);
  909         bsd_args.alen = PTRIN(args->namelen);   /* XXX */
  910         error = sys_getsockname(td, &bsd_args);
  911         bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa);
  912         if (error)
  913                 return (error);
  914         return (linux_sa_put(PTRIN(args->addr)));
  915 }
  916 
  917 int
  918 linux_getpeername(struct thread *td, struct linux_getpeername_args *args)
  919 {
  920         struct getpeername_args /* {
  921                 int fdes;
  922                 caddr_t asa;
  923                 int *alen;
  924         } */ bsd_args;
  925         int error;
  926 
  927         bsd_args.fdes = args->s;
  928         bsd_args.asa = (struct sockaddr *)PTRIN(args->addr);
  929         bsd_args.alen = (socklen_t *)PTRIN(args->namelen);
  930         error = sys_getpeername(td, &bsd_args);
  931         bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa);
  932         if (error)
  933                 return (error);
  934         return (linux_sa_put(PTRIN(args->addr)));
  935 }
  936 
  937 int
  938 linux_socketpair(struct thread *td, struct linux_socketpair_args *args)
  939 {
  940         struct socketpair_args /* {
  941                 int domain;
  942                 int type;
  943                 int protocol;
  944                 int *rsv;
  945         } */ bsd_args;
  946         int error;
  947 
  948         bsd_args.domain = linux_to_bsd_domain(args->domain);
  949         if (bsd_args.domain != PF_LOCAL)
  950                 return (EAFNOSUPPORT);
  951         bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK;
  952         if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX)
  953                 return (EINVAL);
  954         error = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK,
  955                 &bsd_args.type);
  956         if (error != 0)
  957                 return (error);
  958         if (args->protocol != 0 && args->protocol != PF_UNIX)
  959 
  960                 /*
  961                  * Use of PF_UNIX as protocol argument is not right,
  962                  * but Linux does it.
  963                  * Do not map PF_UNIX as its Linux value is identical
  964                  * to FreeBSD one.
  965                  */
  966                 return (EPROTONOSUPPORT);
  967         else
  968                 bsd_args.protocol = 0;
  969         bsd_args.rsv = (int *)PTRIN(args->rsv);
  970         return (sys_socketpair(td, &bsd_args));
  971 }
  972 
  973 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
  974 struct linux_send_args {
  975         int s;
  976         l_uintptr_t msg;
  977         int len;
  978         int flags;
  979 };
  980 
  981 static int
  982 linux_send(struct thread *td, struct linux_send_args *args)
  983 {
  984         struct sendto_args /* {
  985                 int s;
  986                 caddr_t buf;
  987                 int len;
  988                 int flags;
  989                 caddr_t to;
  990                 int tolen;
  991         } */ bsd_args;
  992 
  993         bsd_args.s = args->s;
  994         bsd_args.buf = (caddr_t)PTRIN(args->msg);
  995         bsd_args.len = args->len;
  996         bsd_args.flags = args->flags;
  997         bsd_args.to = NULL;
  998         bsd_args.tolen = 0;
  999         return (sys_sendto(td, &bsd_args));
 1000 }
 1001 
 1002 struct linux_recv_args {
 1003         int s;
 1004         l_uintptr_t msg;
 1005         int len;
 1006         int flags;
 1007 };
 1008 
 1009 static int
 1010 linux_recv(struct thread *td, struct linux_recv_args *args)
 1011 {
 1012         struct recvfrom_args /* {
 1013                 int s;
 1014                 caddr_t buf;
 1015                 int len;
 1016                 int flags;
 1017                 struct sockaddr *from;
 1018                 socklen_t fromlenaddr;
 1019         } */ bsd_args;
 1020 
 1021         bsd_args.s = args->s;
 1022         bsd_args.buf = (caddr_t)PTRIN(args->msg);
 1023         bsd_args.len = args->len;
 1024         bsd_args.flags = linux_to_bsd_msg_flags(args->flags);
 1025         bsd_args.from = NULL;
 1026         bsd_args.fromlenaddr = 0;
 1027         return (sys_recvfrom(td, &bsd_args));
 1028 }
 1029 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
 1030 
 1031 int
 1032 linux_sendto(struct thread *td, struct linux_sendto_args *args)
 1033 {
 1034         struct msghdr msg;
 1035         struct iovec aiov;
 1036 
 1037         if (linux_check_hdrincl(td, args->s) == 0)
 1038                 /* IP_HDRINCL set, tweak the packet before sending */
 1039                 return (linux_sendto_hdrincl(td, args));
 1040 
 1041         msg.msg_name = PTRIN(args->to);
 1042         msg.msg_namelen = args->tolen;
 1043         msg.msg_iov = &aiov;
 1044         msg.msg_iovlen = 1;
 1045         msg.msg_control = NULL;
 1046         msg.msg_flags = 0;
 1047         aiov.iov_base = PTRIN(args->msg);
 1048         aiov.iov_len = args->len;
 1049         return (linux_sendit(td, args->s, &msg, args->flags, NULL,
 1050             UIO_USERSPACE));
 1051 }
 1052 
 1053 int
 1054 linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args)
 1055 {
 1056         struct msghdr msg;
 1057         struct iovec aiov;
 1058         int error, fromlen;
 1059 
 1060         if (PTRIN(args->fromlen) != NULL) {
 1061                 error = copyin(PTRIN(args->fromlen), &fromlen,
 1062                     sizeof(fromlen));
 1063                 if (error != 0)
 1064                         return (error);
 1065                 if (fromlen < 0)
 1066                         return (EINVAL);
 1067                 msg.msg_namelen = fromlen;
 1068         } else
 1069                 msg.msg_namelen = 0;
 1070 
 1071         msg.msg_name = (struct sockaddr * __restrict)PTRIN(args->from);
 1072         msg.msg_iov = &aiov;
 1073         msg.msg_iovlen = 1;
 1074         aiov.iov_base = PTRIN(args->buf);
 1075         aiov.iov_len = args->len;
 1076         msg.msg_control = 0;
 1077         msg.msg_flags = linux_to_bsd_msg_flags(args->flags);
 1078 
 1079         error = kern_recvit(td, args->s, &msg, UIO_USERSPACE, NULL);
 1080         if (error != 0)
 1081                 return (error);
 1082 
 1083         if (PTRIN(args->from) != NULL) {
 1084                 error = bsd_to_linux_sockaddr((struct sockaddr *)
 1085                     PTRIN(args->from));
 1086                 if (error != 0)
 1087                         return (error);
 1088 
 1089                 error = linux_sa_put((struct osockaddr *)
 1090                     PTRIN(args->from));
 1091         }
 1092 
 1093         if (PTRIN(args->fromlen) != NULL)
 1094                 error = copyout(&msg.msg_namelen, PTRIN(args->fromlen),
 1095                     sizeof(msg.msg_namelen));
 1096 
 1097         return (error);
 1098 }
 1099 
 1100 static int
 1101 linux_sendmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr,
 1102     l_uint flags)
 1103 {
 1104         struct cmsghdr *cmsg;
 1105         struct cmsgcred cmcred;
 1106         struct mbuf *control;
 1107         struct msghdr msg;
 1108         struct l_cmsghdr linux_cmsg;
 1109         struct l_cmsghdr *ptr_cmsg;
 1110         struct l_msghdr linux_msg;
 1111         struct iovec *iov;
 1112         socklen_t datalen;
 1113         struct sockaddr *sa;
 1114         sa_family_t sa_family;
 1115         void *data;
 1116         int error;
 1117 
 1118         error = copyin(msghdr, &linux_msg, sizeof(linux_msg));
 1119         if (error != 0)
 1120                 return (error);
 1121 
 1122         /*
 1123          * Some Linux applications (ping) define a non-NULL control data
 1124          * pointer, but a msg_controllen of 0, which is not allowed in the
 1125          * FreeBSD system call interface.  NULL the msg_control pointer in
 1126          * order to handle this case.  This should be checked, but allows the
 1127          * Linux ping to work.
 1128          */
 1129         if (PTRIN(linux_msg.msg_control) != NULL && linux_msg.msg_controllen == 0)
 1130                 linux_msg.msg_control = PTROUT(NULL);
 1131 
 1132         error = linux_to_bsd_msghdr(&msg, &linux_msg);
 1133         if (error != 0)
 1134                 return (error);
 1135 
 1136 #ifdef COMPAT_LINUX32
 1137         error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen,
 1138             &iov, EMSGSIZE);
 1139 #else
 1140         error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
 1141 #endif
 1142         if (error != 0)
 1143                 return (error);
 1144 
 1145         control = NULL;
 1146         cmsg = NULL;
 1147 
 1148         if ((ptr_cmsg = LINUX_CMSG_FIRSTHDR(&linux_msg)) != NULL) {
 1149                 error = kern_getsockname(td, s, &sa, &datalen);
 1150                 if (error != 0)
 1151                         goto bad;
 1152                 sa_family = sa->sa_family;
 1153                 free(sa, M_SONAME);
 1154 
 1155                 error = ENOBUFS;
 1156                 cmsg = malloc(CMSG_HDRSZ, M_LINUX, M_WAITOK|M_ZERO);
 1157                 control = m_get(M_WAITOK, MT_CONTROL);
 1158 
 1159                 do {
 1160                         error = copyin(ptr_cmsg, &linux_cmsg,
 1161                             sizeof(struct l_cmsghdr));
 1162                         if (error != 0)
 1163                                 goto bad;
 1164 
 1165                         error = EINVAL;
 1166                         if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr))
 1167                                 goto bad;
 1168 
 1169                         /*
 1170                          * Now we support only SCM_RIGHTS and SCM_CRED,
 1171                          * so return EINVAL in any other cmsg_type
 1172                          */
 1173                         cmsg->cmsg_type =
 1174                             linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type);
 1175                         cmsg->cmsg_level =
 1176                             linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level);
 1177                         if (cmsg->cmsg_type == -1
 1178                             || cmsg->cmsg_level != SOL_SOCKET)
 1179                                 goto bad;
 1180 
 1181                         /*
 1182                          * Some applications (e.g. pulseaudio) attempt to
 1183                          * send ancillary data even if the underlying protocol
 1184                          * doesn't support it which is not allowed in the
 1185                          * FreeBSD system call interface.
 1186                          */
 1187                         if (sa_family != AF_UNIX)
 1188                                 continue;
 1189 
 1190                         data = LINUX_CMSG_DATA(ptr_cmsg);
 1191                         datalen = linux_cmsg.cmsg_len - L_CMSG_HDRSZ;
 1192 
 1193                         switch (cmsg->cmsg_type)
 1194                         {
 1195                         case SCM_RIGHTS:
 1196                                 break;
 1197 
 1198                         case SCM_CREDS:
 1199                                 data = &cmcred;
 1200                                 datalen = sizeof(cmcred);
 1201 
 1202                                 /*
 1203                                  * The lower levels will fill in the structure
 1204                                  */
 1205                                 bzero(data, datalen);
 1206                                 break;
 1207                         }
 1208 
 1209                         cmsg->cmsg_len = CMSG_LEN(datalen);
 1210 
 1211                         error = ENOBUFS;
 1212                         if (!m_append(control, CMSG_HDRSZ, (c_caddr_t)cmsg))
 1213                                 goto bad;
 1214                         if (!m_append(control, datalen, (c_caddr_t)data))
 1215                                 goto bad;
 1216                 } while ((ptr_cmsg = LINUX_CMSG_NXTHDR(&linux_msg, ptr_cmsg)));
 1217 
 1218                 if (m_length(control, NULL) == 0) {
 1219                         m_freem(control);
 1220                         control = NULL;
 1221                 }
 1222         }
 1223 
 1224         msg.msg_iov = iov;
 1225         msg.msg_flags = 0;
 1226         error = linux_sendit(td, s, &msg, flags, control, UIO_USERSPACE);
 1227         control = NULL;
 1228 
 1229 bad:
 1230         m_freem(control);
 1231         free(iov, M_IOV);
 1232         if (cmsg)
 1233                 free(cmsg, M_LINUX);
 1234         return (error);
 1235 }
 1236 
 1237 int
 1238 linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args)
 1239 {
 1240 
 1241         return (linux_sendmsg_common(td, args->s, PTRIN(args->msg),
 1242             args->flags));
 1243 }
 1244 
 1245 int
 1246 linux_sendmmsg(struct thread *td, struct linux_sendmmsg_args *args)
 1247 {
 1248         struct l_mmsghdr *msg;
 1249         l_uint retval;
 1250         int error, datagrams;
 1251 
 1252         if (args->vlen > UIO_MAXIOV)
 1253                 args->vlen = UIO_MAXIOV;
 1254 
 1255         msg = PTRIN(args->msg);
 1256         datagrams = 0;
 1257         while (datagrams < args->vlen) {
 1258                 error = linux_sendmsg_common(td, args->s, &msg->msg_hdr,
 1259                     args->flags);
 1260                 if (error != 0)
 1261                         break;
 1262 
 1263                 retval = td->td_retval[0];
 1264                 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len));
 1265                 if (error != 0)
 1266                         break;
 1267                 ++msg;
 1268                 ++datagrams;
 1269         }
 1270         if (error == 0)
 1271                 td->td_retval[0] = datagrams;
 1272         return (error);
 1273 }
 1274 
 1275 static int
 1276 linux_recvmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr,
 1277     l_uint flags, struct msghdr *msg)
 1278 {
 1279         struct cmsghdr *cm;
 1280         struct cmsgcred *cmcred;
 1281         struct l_cmsghdr *linux_cmsg = NULL;
 1282         struct l_ucred linux_ucred;
 1283         socklen_t datalen, outlen;
 1284         struct l_msghdr linux_msg;
 1285         struct iovec *iov, *uiov;
 1286         struct mbuf *control = NULL;
 1287         struct mbuf **controlp;
 1288         struct timeval *ftmvl;
 1289         l_timeval ltmvl;
 1290         caddr_t outbuf;
 1291         void *data;
 1292         int error, i, fd, fds, *fdp;
 1293 
 1294         error = copyin(msghdr, &linux_msg, sizeof(linux_msg));
 1295         if (error != 0)
 1296                 return (error);
 1297 
 1298         error = linux_to_bsd_msghdr(msg, &linux_msg);
 1299         if (error != 0)
 1300                 return (error);
 1301 
 1302 #ifdef COMPAT_LINUX32
 1303         error = linux32_copyiniov(PTRIN(msg->msg_iov), msg->msg_iovlen,
 1304             &iov, EMSGSIZE);
 1305 #else
 1306         error = copyiniov(msg->msg_iov, msg->msg_iovlen, &iov, EMSGSIZE);
 1307 #endif
 1308         if (error != 0)
 1309                 return (error);
 1310 
 1311         if (msg->msg_name) {
 1312                 error = linux_to_bsd_sockaddr((struct sockaddr *)msg->msg_name,
 1313                     msg->msg_namelen);
 1314                 if (error != 0)
 1315                         goto bad;
 1316         }
 1317 
 1318         uiov = msg->msg_iov;
 1319         msg->msg_iov = iov;
 1320         controlp = (msg->msg_control != NULL) ? &control : NULL;
 1321         error = kern_recvit(td, s, msg, UIO_USERSPACE, controlp);
 1322         msg->msg_iov = uiov;
 1323         if (error != 0)
 1324                 goto bad;
 1325 
 1326         error = bsd_to_linux_msghdr(msg, &linux_msg);
 1327         if (error != 0)
 1328                 goto bad;
 1329 
 1330         if (linux_msg.msg_name) {
 1331                 error = bsd_to_linux_sockaddr((struct sockaddr *)
 1332                     PTRIN(linux_msg.msg_name));
 1333                 if (error != 0)
 1334                         goto bad;
 1335         }
 1336         if (linux_msg.msg_name && linux_msg.msg_namelen > 2) {
 1337                 error = linux_sa_put(PTRIN(linux_msg.msg_name));
 1338                 if (error != 0)
 1339                         goto bad;
 1340         }
 1341 
 1342         outbuf = PTRIN(linux_msg.msg_control);
 1343         outlen = 0;
 1344 
 1345         if (control) {
 1346                 linux_cmsg = malloc(L_CMSG_HDRSZ, M_LINUX, M_WAITOK | M_ZERO);
 1347 
 1348                 msg->msg_control = mtod(control, struct cmsghdr *);
 1349                 msg->msg_controllen = control->m_len;
 1350 
 1351                 cm = CMSG_FIRSTHDR(msg);
 1352 
 1353                 while (cm != NULL) {
 1354                         linux_cmsg->cmsg_type =
 1355                             bsd_to_linux_cmsg_type(cm->cmsg_type);
 1356                         linux_cmsg->cmsg_level =
 1357                             bsd_to_linux_sockopt_level(cm->cmsg_level);
 1358                         if (linux_cmsg->cmsg_type == -1
 1359                             || cm->cmsg_level != SOL_SOCKET)
 1360                         {
 1361                                 error = EINVAL;
 1362                                 goto bad;
 1363                         }
 1364 
 1365                         data = CMSG_DATA(cm);
 1366                         datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data;
 1367 
 1368                         switch (cm->cmsg_type)
 1369                         {
 1370                         case SCM_RIGHTS:
 1371                                 if (flags & LINUX_MSG_CMSG_CLOEXEC) {
 1372                                         fds = datalen / sizeof(int);
 1373                                         fdp = data;
 1374                                         for (i = 0; i < fds; i++) {
 1375                                                 fd = *fdp++;
 1376                                                 (void)kern_fcntl(td, fd,
 1377                                                     F_SETFD, FD_CLOEXEC);
 1378                                         }
 1379                                 }
 1380                                 break;
 1381 
 1382                         case SCM_CREDS:
 1383                                 /*
 1384                                  * Currently LOCAL_CREDS is never in
 1385                                  * effect for Linux so no need to worry
 1386                                  * about sockcred
 1387                                  */
 1388                                 if (datalen != sizeof(*cmcred)) {
 1389                                         error = EMSGSIZE;
 1390                                         goto bad;
 1391                                 }
 1392                                 cmcred = (struct cmsgcred *)data;
 1393                                 bzero(&linux_ucred, sizeof(linux_ucred));
 1394                                 linux_ucred.pid = cmcred->cmcred_pid;
 1395                                 linux_ucred.uid = cmcred->cmcred_uid;
 1396                                 linux_ucred.gid = cmcred->cmcred_gid;
 1397                                 data = &linux_ucred;
 1398                                 datalen = sizeof(linux_ucred);
 1399                                 break;
 1400 
 1401                         case SCM_TIMESTAMP:
 1402                                 if (datalen != sizeof(struct timeval)) {
 1403                                         error = EMSGSIZE;
 1404                                         goto bad;
 1405                                 }
 1406                                 ftmvl = (struct timeval *)data;
 1407                                 ltmvl.tv_sec = ftmvl->tv_sec;
 1408                                 ltmvl.tv_usec = ftmvl->tv_usec;
 1409                                 data = &ltmvl;
 1410                                 datalen = sizeof(ltmvl);
 1411                                 break;
 1412                         }
 1413 
 1414                         if (outlen + LINUX_CMSG_LEN(datalen) >
 1415                             linux_msg.msg_controllen) {
 1416                                 if (outlen == 0) {
 1417                                         error = EMSGSIZE;
 1418                                         goto bad;
 1419                                 } else {
 1420                                         linux_msg.msg_flags |=
 1421                                             LINUX_MSG_CTRUNC;
 1422                                         goto out;
 1423                                 }
 1424                         }
 1425 
 1426                         linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen);
 1427 
 1428                         error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ);
 1429                         if (error)
 1430                                 goto bad;
 1431                         outbuf += L_CMSG_HDRSZ;
 1432 
 1433                         error = copyout(data, outbuf, datalen);
 1434                         if (error)
 1435                                 goto bad;
 1436 
 1437                         outbuf += LINUX_CMSG_ALIGN(datalen);
 1438                         outlen += LINUX_CMSG_LEN(datalen);
 1439 
 1440                         cm = CMSG_NXTHDR(msg, cm);
 1441                 }
 1442         }
 1443 
 1444 out:
 1445         linux_msg.msg_controllen = outlen;
 1446         error = copyout(&linux_msg, msghdr, sizeof(linux_msg));
 1447 
 1448 bad:
 1449         free(iov, M_IOV);
 1450         m_freem(control);
 1451         free(linux_cmsg, M_LINUX);
 1452 
 1453         return (error);
 1454 }
 1455 
 1456 int
 1457 linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args)
 1458 {
 1459         struct msghdr bsd_msg;
 1460 
 1461         return (linux_recvmsg_common(td, args->s, PTRIN(args->msg),
 1462             args->flags, &bsd_msg));
 1463 }
 1464 
 1465 int
 1466 linux_recvmmsg(struct thread *td, struct linux_recvmmsg_args *args)
 1467 {
 1468         struct l_mmsghdr *msg;
 1469         struct msghdr bsd_msg;
 1470         struct l_timespec lts;
 1471         struct timespec ts, tts;
 1472         l_uint retval;
 1473         int error, datagrams;
 1474 
 1475         if (args->timeout) {
 1476                 error = copyin(args->timeout, &lts, sizeof(struct l_timespec));
 1477                 if (error != 0)
 1478                         return (error);
 1479                 error = linux_to_native_timespec(&ts, &lts);
 1480                 if (error != 0)
 1481                         return (error);
 1482                 getnanotime(&tts);
 1483                 timespecadd(&tts, &ts);
 1484         }
 1485 
 1486         msg = PTRIN(args->msg);
 1487         datagrams = 0;
 1488         while (datagrams < args->vlen) {
 1489                 error = linux_recvmsg_common(td, args->s, &msg->msg_hdr,
 1490                     args->flags & ~LINUX_MSG_WAITFORONE, &bsd_msg);
 1491                 if (error != 0)
 1492                         break;
 1493 
 1494                 retval = td->td_retval[0];
 1495                 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len));
 1496                 if (error != 0)
 1497                         break;
 1498                 ++msg;
 1499                 ++datagrams;
 1500 
 1501                 /*
 1502                  * MSG_WAITFORONE turns on MSG_DONTWAIT after one packet.
 1503                  */
 1504                 if (args->flags & LINUX_MSG_WAITFORONE)
 1505                         args->flags |= LINUX_MSG_DONTWAIT;
 1506 
 1507                 /*
 1508                  * See BUGS section of recvmmsg(2).
 1509                  */
 1510                 if (args->timeout) {
 1511                         getnanotime(&ts);
 1512                         timespecsub(&ts, &tts);
 1513                         if (!timespecisset(&ts) || ts.tv_sec > 0)
 1514                                 break;
 1515                 }
 1516                 /* Out of band data, return right away. */
 1517                 if (bsd_msg.msg_flags & MSG_OOB)
 1518                         break;
 1519         }
 1520         if (error == 0)
 1521                 td->td_retval[0] = datagrams;
 1522         return (error);
 1523 }
 1524 
 1525 int
 1526 linux_shutdown(struct thread *td, struct linux_shutdown_args *args)
 1527 {
 1528         struct shutdown_args /* {
 1529                 int s;
 1530                 int how;
 1531         } */ bsd_args;
 1532 
 1533         bsd_args.s = args->s;
 1534         bsd_args.how = args->how;
 1535         return (sys_shutdown(td, &bsd_args));
 1536 }
 1537 
 1538 int
 1539 linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args)
 1540 {
 1541         struct setsockopt_args /* {
 1542                 int s;
 1543                 int level;
 1544                 int name;
 1545                 caddr_t val;
 1546                 int valsize;
 1547         } */ bsd_args;
 1548         l_timeval linux_tv;
 1549         struct timeval tv;
 1550         int error, name;
 1551 
 1552         bsd_args.s = args->s;
 1553         bsd_args.level = linux_to_bsd_sockopt_level(args->level);
 1554         switch (bsd_args.level) {
 1555         case SOL_SOCKET:
 1556                 name = linux_to_bsd_so_sockopt(args->optname);
 1557                 switch (name) {
 1558                 case SO_RCVTIMEO:
 1559                         /* FALLTHROUGH */
 1560                 case SO_SNDTIMEO:
 1561                         error = copyin(PTRIN(args->optval), &linux_tv,
 1562                             sizeof(linux_tv));
 1563                         if (error)
 1564                                 return (error);
 1565                         tv.tv_sec = linux_tv.tv_sec;
 1566                         tv.tv_usec = linux_tv.tv_usec;
 1567                         return (kern_setsockopt(td, args->s, bsd_args.level,
 1568                             name, &tv, UIO_SYSSPACE, sizeof(tv)));
 1569                         /* NOTREACHED */
 1570                         break;
 1571                 default:
 1572                         break;
 1573                 }
 1574                 break;
 1575         case IPPROTO_IP:
 1576                 name = linux_to_bsd_ip_sockopt(args->optname);
 1577                 break;
 1578         case IPPROTO_IPV6:
 1579                 name = linux_to_bsd_ip6_sockopt(args->optname);
 1580                 break;
 1581         case IPPROTO_TCP:
 1582                 name = linux_to_bsd_tcp_sockopt(args->optname);
 1583                 break;
 1584         default:
 1585                 name = -1;
 1586                 break;
 1587         }
 1588         if (name == -1)
 1589                 return (ENOPROTOOPT);
 1590 
 1591         bsd_args.name = name;
 1592         bsd_args.val = PTRIN(args->optval);
 1593         bsd_args.valsize = args->optlen;
 1594 
 1595         if (name == IPV6_NEXTHOP) {
 1596                 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val,
 1597                         bsd_args.valsize);
 1598                 error = sys_setsockopt(td, &bsd_args);
 1599                 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val);
 1600         } else
 1601                 error = sys_setsockopt(td, &bsd_args);
 1602 
 1603         return (error);
 1604 }
 1605 
 1606 int
 1607 linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args)
 1608 {
 1609         struct getsockopt_args /* {
 1610                 int s;
 1611                 int level;
 1612                 int name;
 1613                 caddr_t val;
 1614                 int *avalsize;
 1615         } */ bsd_args;
 1616         l_timeval linux_tv;
 1617         struct timeval tv;
 1618         socklen_t tv_len, xulen, len;
 1619         struct xucred xu;
 1620         struct l_ucred lxu;
 1621         int error, name, newval;
 1622 
 1623         bsd_args.s = args->s;
 1624         bsd_args.level = linux_to_bsd_sockopt_level(args->level);
 1625         switch (bsd_args.level) {
 1626         case SOL_SOCKET:
 1627                 name = linux_to_bsd_so_sockopt(args->optname);
 1628                 switch (name) {
 1629                 case SO_RCVTIMEO:
 1630                         /* FALLTHROUGH */
 1631                 case SO_SNDTIMEO:
 1632                         tv_len = sizeof(tv);
 1633                         error = kern_getsockopt(td, args->s, bsd_args.level,
 1634                             name, &tv, UIO_SYSSPACE, &tv_len);
 1635                         if (error)
 1636                                 return (error);
 1637                         linux_tv.tv_sec = tv.tv_sec;
 1638                         linux_tv.tv_usec = tv.tv_usec;
 1639                         return (copyout(&linux_tv, PTRIN(args->optval),
 1640                             sizeof(linux_tv)));
 1641                         /* NOTREACHED */
 1642                         break;
 1643                 case LOCAL_PEERCRED:
 1644                         if (args->optlen != sizeof(lxu))
 1645                                 return (EINVAL);
 1646                         xulen = sizeof(xu);
 1647                         error = kern_getsockopt(td, args->s, bsd_args.level,
 1648                             name, &xu, UIO_SYSSPACE, &xulen);
 1649                         if (error)
 1650                                 return (error);
 1651                         /*
 1652                          * XXX Use 0 for pid as the FreeBSD does not cache peer pid.
 1653                          */
 1654                         lxu.pid = 0;
 1655                         lxu.uid = xu.cr_uid;
 1656                         lxu.gid = xu.cr_gid;
 1657                         return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu)));
 1658                         /* NOTREACHED */
 1659                         break;
 1660                 case SO_ERROR:
 1661                         len = sizeof(newval);
 1662                         error = kern_getsockopt(td, args->s, bsd_args.level,
 1663                             name, &newval, UIO_SYSSPACE, &len);
 1664                         if (error)
 1665                                 return (error);
 1666                         newval = -SV_ABI_ERRNO(td->td_proc, newval);
 1667                         return (copyout(&newval, PTRIN(args->optval), len));
 1668                         /* NOTREACHED */
 1669                 default:
 1670                         break;
 1671                 }
 1672                 break;
 1673         case IPPROTO_IP:
 1674                 name = linux_to_bsd_ip_sockopt(args->optname);
 1675                 break;
 1676         case IPPROTO_IPV6:
 1677                 name = linux_to_bsd_ip6_sockopt(args->optname);
 1678                 break;
 1679         case IPPROTO_TCP:
 1680                 name = linux_to_bsd_tcp_sockopt(args->optname);
 1681                 break;
 1682         default:
 1683                 name = -1;
 1684                 break;
 1685         }
 1686         if (name == -1)
 1687                 return (EINVAL);
 1688 
 1689         bsd_args.name = name;
 1690         bsd_args.val = PTRIN(args->optval);
 1691         bsd_args.avalsize = PTRIN(args->optlen);
 1692 
 1693         if (name == IPV6_NEXTHOP) {
 1694                 error = sys_getsockopt(td, &bsd_args);
 1695                 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val);
 1696         } else
 1697                 error = sys_getsockopt(td, &bsd_args);
 1698 
 1699         return (error);
 1700 }
 1701 
 1702 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
 1703 
 1704 /* Argument list sizes for linux_socketcall */
 1705 
 1706 #define LINUX_AL(x) ((x) * sizeof(l_ulong))
 1707 
 1708 static const unsigned char lxs_args[] = {
 1709         LINUX_AL(0) /* unused*/,        LINUX_AL(3) /* socket */,
 1710         LINUX_AL(3) /* bind */,         LINUX_AL(3) /* connect */,
 1711         LINUX_AL(2) /* listen */,       LINUX_AL(3) /* accept */,
 1712         LINUX_AL(3) /* getsockname */,  LINUX_AL(3) /* getpeername */,
 1713         LINUX_AL(4) /* socketpair */,   LINUX_AL(4) /* send */,
 1714         LINUX_AL(4) /* recv */,         LINUX_AL(6) /* sendto */,
 1715         LINUX_AL(6) /* recvfrom */,     LINUX_AL(2) /* shutdown */,
 1716         LINUX_AL(5) /* setsockopt */,   LINUX_AL(5) /* getsockopt */,
 1717         LINUX_AL(3) /* sendmsg */,      LINUX_AL(3) /* recvmsg */,
 1718         LINUX_AL(4) /* accept4 */,      LINUX_AL(5) /* recvmmsg */,
 1719         LINUX_AL(4) /* sendmmsg */
 1720 };
 1721 
 1722 #define LINUX_AL_SIZE   sizeof(lxs_args) / sizeof(lxs_args[0]) - 1
 1723 
 1724 int
 1725 linux_socketcall(struct thread *td, struct linux_socketcall_args *args)
 1726 {
 1727         l_ulong a[6];
 1728         void *arg;
 1729         int error;
 1730 
 1731         if (args->what < LINUX_SOCKET || args->what > LINUX_AL_SIZE)
 1732                 return (EINVAL);
 1733         error = copyin(PTRIN(args->args), a, lxs_args[args->what]);
 1734         if (error)
 1735                 return (error);
 1736 
 1737         arg = a;
 1738         switch (args->what) {
 1739         case LINUX_SOCKET:
 1740                 return (linux_socket(td, arg));
 1741         case LINUX_BIND:
 1742                 return (linux_bind(td, arg));
 1743         case LINUX_CONNECT:
 1744                 return (linux_connect(td, arg));
 1745         case LINUX_LISTEN:
 1746                 return (linux_listen(td, arg));
 1747         case LINUX_ACCEPT:
 1748                 return (linux_accept(td, arg));
 1749         case LINUX_GETSOCKNAME:
 1750                 return (linux_getsockname(td, arg));
 1751         case LINUX_GETPEERNAME:
 1752                 return (linux_getpeername(td, arg));
 1753         case LINUX_SOCKETPAIR:
 1754                 return (linux_socketpair(td, arg));
 1755         case LINUX_SEND:
 1756                 return (linux_send(td, arg));
 1757         case LINUX_RECV:
 1758                 return (linux_recv(td, arg));
 1759         case LINUX_SENDTO:
 1760                 return (linux_sendto(td, arg));
 1761         case LINUX_RECVFROM:
 1762                 return (linux_recvfrom(td, arg));
 1763         case LINUX_SHUTDOWN:
 1764                 return (linux_shutdown(td, arg));
 1765         case LINUX_SETSOCKOPT:
 1766                 return (linux_setsockopt(td, arg));
 1767         case LINUX_GETSOCKOPT:
 1768                 return (linux_getsockopt(td, arg));
 1769         case LINUX_SENDMSG:
 1770                 return (linux_sendmsg(td, arg));
 1771         case LINUX_RECVMSG:
 1772                 return (linux_recvmsg(td, arg));
 1773         case LINUX_ACCEPT4:
 1774                 return (linux_accept4(td, arg));
 1775         case LINUX_RECVMMSG:
 1776                 return (linux_recvmmsg(td, arg));
 1777         case LINUX_SENDMMSG:
 1778                 return (linux_sendmmsg(td, arg));
 1779         }
 1780 
 1781         uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what);
 1782         return (ENOSYS);
 1783 }
 1784 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */

Cache object: efd6bd67376cecdd65787349ab5cfa60


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.