sysdeps/mach/hurd/bind.c

   1 /* Copyright (C) 1992, 1994 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/fd.h>
  24 #include <hurd/socket.h>
  25 #include <hurd/paths.h>
  26 #include <fcntl.h>
  27 #include <stddef.h>
  28 #include <hurd/ifsock.h>
  29 #include <sys/un.h>
  30 #include <string.h>
  31
  32 /* Give the socket FD the local address ADDR (which is LEN bytes long).  */
  33 int
  34 DEFUN(bind, (fd, addr, len),
  35       int fd AND struct sockaddr *addr AND size_t len)
  36 {
  37   addr_port_t aport;
  38   error_t err;
  39
  40   if (addr->sa_family == AF_LOCAL)
  41     {
  42       /* For the local domain, we must create a node in the filesystem
  43          using the ifsock translator and then fetch the address from it.  */
  44       struct sockaddr_un *unaddr = (struct sockaddr_un *) addr;
  45       file_t dir, node;
  46       char name[len - offsetof (struct sockaddr_un, sun_path)], *n;
  47       strncpy (name, unaddr->sun_path, sizeof name);
  48       dir = __file_name_split (name, &n);
  49       if (dir == MACH_PORT_NULL)
  50         return -1;
  51
  52       /* Create a new, unlinked node in the target directory.  */
  53       err = __dir_mkfile (dir, O_CREAT, 0666 & ~_hurd_umask, &node);
  54
  55       if (! err)
  56         {
  57           file_t ifsock;
  58           /* Set the node's translator to make it a local-domain socket.  */
  59           err = __file_set_translator (node,
  60                                        FS_TRANS_EXCL | FS_TRANS_SET,
  61                                        FS_TRANS_EXCL | FS_TRANS_SET, 0,
  62                                        _HURD_IFSOCK, sizeof _HURD_IFSOCK,
  63                                        MACH_PORT_NULL,
  64                                        MACH_MSG_TYPE_COPY_SEND);
  65           if (! err)
  66             /* Get a port to the ifsock translator.  */
  67             err = __hurd_invoke_translator (node, 0, &ifsock);
  68           if (! err)
  69             /* Get the address port.  */
  70             err = __ifsock_getsockaddr (ifsock, &aport);
  71           __mach_port_deallocate (__mach_task_self (), ifsock);
  72           if (! err)
  73             /* Link the node, now a socket, into the target directory.  */
  74             err = __dir_link (node, dir, name);
  75           __mach_port_deallocate (__mach_task_self (), node);
  76         }
  77       __mach_port_deallocate (__mach_task_self (), dir);
  78
  79       if (err)
  80         return __hurd_fail (err);
  81     }
  82   else
  83     err = EIEIO;
  84
  85   err = HURD_DPORT_USE (fd,
  86                         ({
  87                           if (err)
  88                             err = __socket_create_address (port,
  89                                                            addr->sa_family,
  90                                                            (char *) addr, len,
  91                                                            &aport, 1);
  92                           if (! err)
  93                             {
  94                               err = __socket_bind (port, aport);
  95                               __mach_port_deallocate (__mach_task_self (),
  96                                                       aport);
  97                             }
  98                           err;
  99                         }));
 100
 101   return err ? __hurd_dfail (fd, err) : 0;
 102 }