root/compat/common/uipc_syscalls_43.c

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DEFINITIONS

This source file includes following definitions.
  1. compat_43_sys_accept
  2. compat_43_sys_getpeername
  3. compat_43_sys_getsockname
  4. compat_43_sys_recv
  5. compat_43_sys_recvfrom
  6. compat_43_sys_recvmsg
  7. compat_43_sys_send
  8. compat_43_sys_sendmsg

    1 /*      $OpenBSD: uipc_syscalls_43.c,v 1.7 2003/06/02 23:27:59 millert Exp $    */
    2 /*      $NetBSD: uipc_syscalls_43.c,v 1.5 1996/03/14 19:31:50 christos Exp $    */
    3 
    4 /*
    5  * Copyright (c) 1982, 1986, 1989, 1990, 1993
    6  *      The Regents of the University of California.  All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. Neither the name of the University nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  *      @(#)uipc_syscalls.c     8.4 (Berkeley) 2/21/94
   33  */
   34 
   35 #include <sys/param.h>
   36 #include <sys/systm.h>
   37 #include <sys/filedesc.h>
   38 #include <sys/kernel.h>
   39 #include <sys/proc.h>
   40 #include <sys/file.h>
   41 #include <sys/socket.h>
   42 #include <sys/socketvar.h>
   43 #include <sys/stat.h>
   44 #include <sys/ioctl.h>
   45 #include <sys/fcntl.h>
   46 #include <sys/malloc.h>
   47 #include <sys/syslog.h>
   48 #include <sys/unistd.h>
   49 #include <sys/resourcevar.h>
   50 
   51 #include <sys/mount.h>
   52 #include <sys/syscallargs.h>
   53 
   54 int
   55 compat_43_sys_accept(p, v, retval)
   56         struct proc *p;
   57         void *v;
   58         register_t *retval;
   59 {
   60         struct sys_accept_args /* {
   61                 syscallarg(int) s;
   62                 syscallarg(caddr_t) name;
   63                 syscallarg(int *) anamelen;
   64         } */ *uap = v;
   65         int error;
   66 
   67         if ((error = sys_accept(p, uap, retval)) != 0)
   68                 return error;
   69 
   70         if (SCARG(uap, name)) {
   71                 struct sockaddr sa;
   72 
   73                 if ((error = copyin(SCARG(uap, name), &sa, sizeof(sa))) != 0)
   74                         return error;
   75 
   76                 ((struct osockaddr*) &sa)->sa_family = sa.sa_family;
   77 
   78                 if ((error = copyout(&sa, SCARG(uap, name), sizeof(sa))) != 0)
   79                         return error;
   80         }
   81         return 0;
   82 }
   83 
   84 
   85 int
   86 compat_43_sys_getpeername(p, v, retval)
   87         struct proc *p;
   88         void *v;
   89         register_t *retval;
   90 {
   91         struct sys_getpeername_args /* {
   92                 syscallarg(int) fdes;
   93                 syscallarg(caddr_t) asa;
   94                 syscallarg(int *) alen;
   95         } */ *uap = v;
   96         struct sockaddr sa;
   97 
   98         int error;
   99 
  100         if ((error = sys_getpeername(p, uap, retval)) != 0)
  101                 return error;
  102 
  103         if ((error = copyin(SCARG(uap, asa), &sa, sizeof(sa))) != 0)
  104                 return error;
  105 
  106         ((struct osockaddr*) &sa)->sa_family = sa.sa_family;
  107 
  108         if ((error = copyout(&sa, SCARG(uap, asa), sizeof(sa))) != 0)
  109                 return error;
  110 
  111         return 0;
  112 }
  113 
  114 
  115 int
  116 compat_43_sys_getsockname(p, v, retval)
  117         struct proc *p;
  118         void *v;
  119         register_t *retval;
  120 {
  121         struct sys_getsockname_args /* {
  122                 syscallarg(int) fdes;
  123                 syscallarg(caddr_t) asa;
  124                 syscallarg(int *) alen;
  125         } */ *uap = v;
  126         struct sockaddr sa;
  127         int error;
  128 
  129         if ((error = sys_getsockname(p, uap, retval)) != 0)
  130                 return error;
  131 
  132         if ((error = copyin(SCARG(uap, asa), &sa, sizeof(sa))) != 0)
  133                 return error;
  134 
  135         ((struct osockaddr*) &sa)->sa_family = sa.sa_family;
  136 
  137         if ((error = copyout(&sa, SCARG(uap, asa), sizeof(sa))) != 0)
  138                 return error;
  139 
  140         return 0;
  141 }
  142 
  143 
  144 int
  145 compat_43_sys_recv(p, v, retval)
  146         struct proc *p;
  147         void *v;
  148         register_t *retval;
  149 {
  150         register struct compat_43_sys_recv_args /* {
  151                 syscallarg(int) s;
  152                 syscallarg(caddr_t) buf;
  153                 syscallarg(int) len;
  154                 syscallarg(int) flags;
  155         } */ *uap = v;
  156         struct msghdr msg;
  157         struct iovec aiov;
  158 
  159         msg.msg_name = 0;
  160         msg.msg_namelen = 0;
  161         msg.msg_iov = &aiov;
  162         msg.msg_iovlen = 1;
  163         aiov.iov_base = SCARG(uap, buf);
  164         aiov.iov_len = SCARG(uap, len);
  165         msg.msg_control = 0;
  166         msg.msg_flags = SCARG(uap, flags);
  167         return (recvit(p, SCARG(uap, s), &msg, (caddr_t)0, retval));
  168 }
  169 
  170 
  171 #ifdef MSG_COMPAT
  172 int
  173 compat_43_sys_recvfrom(p, v, retval)
  174         struct proc *p;
  175         void *v;
  176         register_t *retval;
  177 {
  178         struct sys_recvfrom_args /* {
  179                 syscallarg(int) s;
  180                 syscallarg(caddr_t) buf;
  181                 syscallarg(size_t) len;
  182                 syscallarg(int) flags;
  183                 syscallarg(caddr_t) from;
  184                 syscallarg(int *) fromlenaddr;
  185         } */ *uap = v;
  186 
  187         SCARG(uap, flags) |= MSG_COMPAT;
  188         return (sys_recvfrom(p, uap, retval));
  189 }
  190 #endif
  191 
  192 
  193 #ifdef MSG_COMPAT
  194 /*
  195  * Old recvmsg.  This code takes advantage of the fact that the old msghdr
  196  * overlays the new one, missing only the flags, and with the (old) access
  197  * rights where the control fields are now.
  198  */
  199 int
  200 compat_43_sys_recvmsg(p, v, retval)
  201         struct proc *p;
  202         void *v;
  203         register_t *retval;
  204 {
  205         register struct compat_43_sys_recvmsg_args /* {
  206                 syscallarg(int) s;
  207                 syscallarg(struct omsghdr *) msg;
  208                 syscallarg(int) flags;
  209         } */ *uap = v;
  210         struct msghdr msg;
  211         struct iovec aiov[UIO_SMALLIOV], *iov;
  212         int error;
  213 
  214         error = copyin((caddr_t)SCARG(uap, msg), (caddr_t)&msg,
  215             sizeof (struct omsghdr));
  216         if (error)
  217                 return (error);
  218         if (msg.msg_iovlen <= 0 || msg.msg_iovlen > IOV_MAX)
  219                 return (EMSGSIZE);
  220         if (msg.msg_iovlen > UIO_SMALLIOV)
  221                 MALLOC(iov, struct iovec *,
  222                       sizeof(struct iovec) * msg.msg_iovlen, M_IOV, M_WAITOK);
  223         else
  224                 iov = aiov;
  225         msg.msg_flags = SCARG(uap, flags) | MSG_COMPAT;
  226         error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov,
  227             (unsigned)(msg.msg_iovlen * sizeof (struct iovec)));
  228         if (error)
  229                 goto done;
  230         msg.msg_iov = iov;
  231         error = recvit(p, SCARG(uap, s), &msg,
  232             (caddr_t)&SCARG(uap, msg)->msg_namelen, retval);
  233 
  234         if (msg.msg_controllen && error == 0)
  235                 error = copyout((caddr_t)&msg.msg_controllen,
  236                     (caddr_t)&SCARG(uap, msg)->msg_accrightslen, sizeof (int));
  237 done:
  238         if (iov != aiov)
  239                 FREE(iov, M_IOV);
  240         return (error);
  241 }
  242 #endif
  243 
  244 int
  245 compat_43_sys_send(p, v, retval)
  246         struct proc *p;
  247         void *v;
  248         register_t *retval;
  249 {
  250         register struct compat_43_sys_send_args /* {
  251                 syscallarg(int) s;
  252                 syscallarg(caddr_t) buf;
  253                 syscallarg(int) len;
  254                 syscallarg(int) flags;
  255         } */ *uap = v;
  256         struct msghdr msg;
  257         struct iovec aiov;
  258 
  259         msg.msg_name = 0;
  260         msg.msg_namelen = 0;
  261         msg.msg_iov = &aiov;
  262         msg.msg_iovlen = 1;
  263         aiov.iov_base = SCARG(uap, buf);
  264         aiov.iov_len = SCARG(uap, len);
  265         msg.msg_control = 0;
  266         msg.msg_flags = 0;
  267         return (sendit(p, SCARG(uap, s), &msg, SCARG(uap, flags), retval));
  268 }
  269 
  270 #ifdef MSG_COMPAT
  271 int
  272 compat_43_sys_sendmsg(p, v, retval)
  273         struct proc *p;
  274         void *v;
  275         register_t *retval;
  276 {
  277         register struct compat_43_sys_sendmsg_args /* {
  278                 syscallarg(int) s;
  279                 syscallarg(caddr_t) msg;
  280                 syscallarg(int) flags;
  281         } */ *uap = v;
  282         struct msghdr msg;
  283         struct iovec aiov[UIO_SMALLIOV], *iov;
  284         int error;
  285 
  286         error = copyin(SCARG(uap, msg), (caddr_t)&msg,
  287             sizeof (struct omsghdr));
  288         if (error)
  289                 return (error);
  290         if (msg.msg_iovlen <= 0 || msg.msg_iovlen > IOV_MAX)
  291                 return (EMSGSIZE);
  292         if (msg.msg_iovlen > UIO_SMALLIOV)
  293                 MALLOC(iov, struct iovec *,
  294                       sizeof(struct iovec) * msg.msg_iovlen, M_IOV, M_WAITOK);
  295         else
  296                 iov = aiov;
  297         error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov,
  298             (unsigned)(msg.msg_iovlen * sizeof (struct iovec)));
  299         if (error)
  300                 goto done;
  301         msg.msg_flags = MSG_COMPAT;
  302         msg.msg_iov = iov;
  303         error = sendit(p, SCARG(uap, s), &msg, SCARG(uap, flags), retval);
  304 done:
  305         if (iov != aiov)
  306                 FREE(iov, M_IOV);
  307         return (error);
  308 }
  309 #endif

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