sysdeps/mach/hurd/sendto.c

   1 /* Copyright (C) 1994, 1995, 1996 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 <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 (fd, buf, n, flags, addr, addr_len)
  31      int fd;
  32      const void *buf;
  33      size_t n;
  34      int flags;
  35      const struct sockaddr_un *addr;
  36      size_t addr_len;
  37 {
  38   addr_port_t aport;
  39   error_t err;
  40   int wrote;
  41
  42   if (addr->sun_family == AF_LOCAL)
  43     {
  44       /* For the local domain, we must look up the name as a file and talk
  45          to it with the ifsock protocol.  */
  46       file_t file = __file_name_lookup (addr->sun_path, 0, 0);
  47       if (file == MACH_PORT_NULL)
  48         return -1;
  49       err = __ifsock_getsockaddr (file, &aport);
  50       __mach_port_deallocate (__mach_task_self (), file);
  51       if (err == MIG_BAD_ID || err == EOPNOTSUPP)
  52         /* The file did not grok the ifsock protocol.  */
  53         err = ENOTSOCK;
  54       if (err)
  55         return __hurd_fail (err);
  56     }
  57   else
  58     err = EIEIO;
  59
  60   /* Get an address port for the desired destination address.  */
  61   err = HURD_DPORT_USE (fd,
  62                         ({
  63                           if (err)
  64                             err = __socket_create_address (port,
  65                                                            addr->sun_family,
  66                                                            (char *) addr,
  67                                                            addr_len,
  68                                                            &aport);
  69                           if (! err)
  70                             {
  71                               /* Send the data.  */
  72                               err = __socket_send (port, aport,
  73                                                    flags, buf, n,
  74                                                    NULL,
  75                                                    MACH_MSG_TYPE_COPY_SEND, 0,
  76                                                    NULL, 0, &wrote);
  77                               __mach_port_deallocate (__mach_task_self (),
  78                                                       aport);
  79                             }
  80                           err;
  81                         }));
  82
  83   return err ? __hurd_dfail (fd, err) : wrote;
  84 }