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/* Copyright (C) 1992-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <sys/socket.h>
#include <hurd.h>
#include <hurd/fd.h>
#include <hurd/socket.h>
#include <hurd/paths.h>
#include <fcntl.h>
#include <stddef.h>
#include <hurd/ifsock.h>
#include <sys/un.h>
#include <string.h>
/* Give the socket FD the local address ADDR (which is LEN bytes long). */
int
__bind (int fd, __CONST_SOCKADDR_ARG addrarg, socklen_t len)
{
addr_port_t aport;
error_t err;
const struct sockaddr_un *addr = addrarg.__sockaddr_un__;
if (addr->sun_family == AF_LOCAL)
{
/* For the local domain, we must create a node in the filesystem
using the ifsock translator and then fetch the address from it. */
file_t dir, node;
char name[len - offsetof (struct sockaddr_un, sun_path) + 1], *n;
strncpy (name, addr->sun_path, sizeof name - 1);
name[sizeof name - 1] = '\0'; /* Make sure */
dir = __file_name_split (name, &n);
if (dir == MACH_PORT_NULL)
return -1;
/* Create a new, unlinked node in the target directory. */
err = __dir_mkfile (dir, O_CREAT, 0666 & ~_hurd_umask, &node);
if (! err)
{
/* Set the node's translator to make it a local-domain socket. */
err = __file_set_translator (node,
FS_TRANS_EXCL | FS_TRANS_SET,
FS_TRANS_EXCL | FS_TRANS_SET, 0,
_HURD_IFSOCK, sizeof _HURD_IFSOCK,
MACH_PORT_NULL,
MACH_MSG_TYPE_COPY_SEND);
if (! err)
{
/* Link the node, now a socket, into the target directory. */
err = __dir_link (dir, node, n, 1);
if (err == EEXIST)
err = EADDRINUSE;
}
__mach_port_deallocate (__mach_task_self (), node);
if (! err)
{
/* Get a port to the ifsock translator. */
file_t ifsock = __file_name_lookup_under (dir, n, 0, 0);
if (ifsock == MACH_PORT_NULL)
{
err = errno;
/* If we failed, get rid of the node we created. */
__dir_unlink (dir, n);
}
else
{
/* Get the address port. */
err = __ifsock_getsockaddr (ifsock, &aport);
if (err == MIG_BAD_ID || err == EOPNOTSUPP)
/* We are not talking to /hurd/ifsock. Probably
someone came in after we linked our node, unlinked
it, and replaced it with a different node, before we
did our lookup. Treat it as if our link had failed
with EEXIST. */
err = EADDRINUSE;
}
__mach_port_deallocate (__mach_task_self (), ifsock);
}
}
__mach_port_deallocate (__mach_task_self (), dir);
if (err)
return __hurd_fail (err);
}
else
err = EIEIO;
err = HURD_DPORT_USE (fd,
({
if (err)
err = __socket_create_address (port,
addr->sun_family,
(char *) addr, len,
&aport);
if (! err)
{
err = __socket_bind (port, aport);
__mach_port_deallocate (__mach_task_self (),
aport);
}
err;
}));
return err ? __hurd_dfail (fd, err) : 0;
}
weak_alias (__bind, bind)
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