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/* Copyright (C) 1994-2020 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
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <hurd.h>
#include <hurd/fd.h>
#include <hurd/ifsock.h>
#include <hurd/socket.h>
#include <sysdep-cancel.h>
#include "hurd/hurdsocket.h"
/* Send N bytes of BUF on socket FD to peer at address ADDR (which is
ADDR_LEN bytes long). Returns the number sent, or -1 for errors. */
ssize_t
__sendto (int fd,
const void *buf,
size_t n,
int flags,
const struct sockaddr_un *addr,
socklen_t addr_len)
{
addr_port_t aport = MACH_PORT_NULL;
error_t err;
size_t wrote;
/* Get an address port for the desired destination address. */
error_t create_address_port (io_t port,
const struct sockaddr_un *addr,
socklen_t addr_len,
addr_port_t *aport)
{
error_t err_port;
if (addr->sun_family == AF_LOCAL)
{
char *name = _hurd_sun_path_dupa (addr, addr_len);
/* For the local domain, we must look up the name as a file and talk
to it with the ifsock protocol. */
file_t file = __file_name_lookup (name, 0, 0);
if (file == MACH_PORT_NULL)
return errno;
err_port = __ifsock_getsockaddr (file, aport);
__mach_port_deallocate (__mach_task_self (), file);
if (err_port == MIG_BAD_ID || err_port == EOPNOTSUPP)
/* The file did not grok the ifsock protocol. */
err_port = ENOTSOCK;
}
else
{
err_port = __socket_create_address (port,
addr->sun_family,
(char *) addr,
addr_len,
aport);
}
return err_port;
}
err = HURD_DPORT_USE_CANCEL (fd,
({
if (addr != NULL)
err = create_address_port (port, addr, addr_len,
&aport);
else
err = 0;
if (! err)
{
/* Send the data. */
int cancel_oldtype = LIBC_CANCEL_ASYNC();
err = __socket_send (port, aport,
flags, buf, n,
NULL,
MACH_MSG_TYPE_COPY_SEND, 0,
NULL, 0, &wrote);
LIBC_CANCEL_RESET (cancel_oldtype);
}
err;
}));
if (aport != MACH_PORT_NULL)
__mach_port_deallocate (__mach_task_self (), aport);
return err ? __hurd_sockfail (fd, flags, err) : wrote;
}
weak_alias (__sendto, sendto)
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