sysdeps/mach/hurd/bind.c

   1 /* Copyright (C) 1992, 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/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             /* Link the node, now a socket, into the target directory.  */
  67             err = __dir_link (dir, node, n);
  68           __mach_port_deallocate (__mach_task_self (), node);
  69           if (! err)
  70             {
  71               /* Get a port to the ifsock translator.  */
  72               ifsock = __file_name_lookup_under (dir, n, 0, 0);
  73               if (ifsock == MACH_PORT_NULL)
  74                 {
  75                   err = errno;
  76                   /* If we failed, get rid of the node we created.  */
  77                   __dir_unlink (dir, n);
  78                 }
  79             }
  80           if (! err)
  81             /* Get the address port.  */
  82             err = __ifsock_getsockaddr (ifsock, &aport);
  83           __mach_port_deallocate (__mach_task_self (), ifsock);
  84         }
  85       __mach_port_deallocate (__mach_task_self (), dir);
  86
  87       if (err)
  88         return __hurd_fail (err);
  89     }
  90   else
  91     err = EIEIO;
  92
  93   err = HURD_DPORT_USE (fd,
  94                         ({
  95                           if (err)
  96                             err = __socket_create_address (port,
  97                                                            addr->sa_family,
  98                                                            (char *) addr, len,
  99                                                            &aport);
 100                           if (! err)
 101                             {
 102                               err = __socket_bind (port, aport);
 103                               __mach_port_deallocate (__mach_task_self (),
 104                                                       aport);
 105                             }
 106                           err;
 107                         }));
 108
 109   return err ? __hurd_dfail (fd, err) : 0;
 110 }