sysdeps/mach/hurd/sendto.c

   1 /* Copyright (C) 1994, 1995 Free Software Foundation, Inc.
   2 This file is part of the GNU C Library.
   3
   4 The GNU C Library is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 License, or (at your option) any later version.
   8
   9 The GNU C Library is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <ansidecl.h>
  20 #include <errno.h>
  21 #include <sys/socket.h>
  22 #include <hurd.h>
  23 #include <hurd/socket.h>
  24 #include <hurd/fd.h>
  25 #include <sys/un.h>
  26 #include <hurd/ifsock.h>
  27
  28 /* Send N bytes of BUF on socket FD to peer at address ADDR (which is
  29    ADDR_LEN bytes long).  Returns the number sent, or -1 for errors.  */
  30 int
  31 DEFUN(sendto, (fd, buf, n, flags, addr, addr_len),
  32       int fd AND PTR buf AND size_t n AND int flags AND
  33       const struct sockaddr_un *addr AND size_t addr_len)
  34 {
  35   addr_port_t aport;
  36   error_t err;
  37   int wrote;
  38
  39   if (addr->sun_family == AF_LOCAL)
  40     {
  41       /* For the local domain, we must look up the name as a file and talk
  42          to it with the ifsock protocol.  */
  43       file_t file = __file_name_lookup (addr->sun_path, 0, 0);
  44       if (file == MACH_PORT_NULL)
  45         return -1;
  46       err = __ifsock_getsockaddr (file, &aport);
  47       __mach_port_deallocate (__mach_task_self (), file);
  48       if (err == MIG_BAD_ID || err == EOPNOTSUPP)
  49         /* The file did not grok the ifsock protocol.  */
  50         err = ENOTSOCK;
  51       if (err)
  52         return __hurd_fail (err);
  53     }
  54   else
  55     err = EIEIO;
  56
  57   /* Get an address port for the desired destination address.  */
  58   err = HURD_DPORT_USE (fd,
  59                         ({
  60                           if (err)
  61                             err = __socket_create_address (port,
  62                                                            addr->sun_family,
  63                                                            (char *) addr,
  64                                                            addr_len,
  65                                                            &aport);
  66                           if (! err)
  67                             {
  68                               /* Send the data.  */
  69                               err = __socket_send (port, aport,
  70                                                    flags, buf, n,
  71                                                    NULL,
  72                                                    MACH_MSG_TYPE_COPY_SEND, 0,
  73                                                    NULL, 0, &wrote);
  74                               __mach_port_deallocate (__mach_task_self (),
  75                                                       aport);
  76                             }
  77                           err;
  78                         }));
  79
  80   return err ? __hurd_dfail (fd, err) : wrote;
  81 }