sysdeps/mach/hurd/sendto.c

   1 /* Copyright (C) 1994, 1995, 1996, 1997 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 not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include <errno.h>
  20 #include <sys/socket.h>
  21 #include <hurd.h>
  22 #include <hurd/socket.h>
  23 #include <hurd/fd.h>
  24 #include <sys/un.h>
  25 #include <hurd/ifsock.h>
  26
  27 /* Send N bytes of BUF on socket FD to peer at address ADDR (which is
  28    ADDR_LEN bytes long).  Returns the number sent, or -1 for errors.  */
  29 int
  30 sendto (int fd,
  31         const void *buf,
  32         size_t n,
  33         int flags,
  34         const struct sockaddr_un *addr,
  35         size_t addr_len)
  36 {
  37   addr_port_t aport;
  38   error_t err;
  39   int wrote;
  40
  41   if (addr->sun_family == AF_LOCAL)
  42     {
  43       /* For the local domain, we must look up the name as a file and talk
  44          to it with the ifsock protocol.  */
  45       file_t file = __file_name_lookup (addr->sun_path, 0, 0);
  46       if (file == MACH_PORT_NULL)
  47         return -1;
  48       err = __ifsock_getsockaddr (file, &aport);
  49       __mach_port_deallocate (__mach_task_self (), file);
  50       if (err == MIG_BAD_ID || err == EOPNOTSUPP)
  51         /* The file did not grok the ifsock protocol.  */
  52         err = ENOTSOCK;
  53       if (err)
  54         return __hurd_fail (err);
  55     }
  56   else
  57     err = EIEIO;
  58
  59   /* Get an address port for the desired destination address.  */
  60   err = HURD_DPORT_USE (fd,
  61                         ({
  62                           if (err)
  63                             err = __socket_create_address (port,
  64                                                            addr->sun_family,
  65                                                            (char *) addr,
  66                                                            addr_len,
  67                                                            &aport);
  68                           if (! err)
  69                             {
  70                               /* Send the data.  */
  71                               err = __socket_send (port, aport,
  72                                                    flags, buf, n,
  73                                                    NULL,
  74                                                    MACH_MSG_TYPE_COPY_SEND, 0,
  75                                                    NULL, 0, &wrote);
  76                               __mach_port_deallocate (__mach_task_self (),
  77                                                       aport);
  78                             }
  79                           err;
  80                         }));
  81
  82   return err ? __hurd_dfail (fd, err) : wrote;
  83 }