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104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
/* Copyright (C) 1994-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <hurd.h>
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#include <hurd/fd.h>
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#include <hurd/ifsock.h>
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#include <hurd/socket.h>
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#include <sysdep-cancel.h>
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#include "hurd/hurdsocket.h"
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/* Send N bytes of BUF on socket FD to peer at address ADDR (which is
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ADDR_LEN bytes long). Returns the number sent, or -1 for errors. */
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ssize_t
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__sendto (int fd,
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const void *buf,
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size_t n,
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int flags,
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const struct sockaddr_un *addr,
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socklen_t addr_len)
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{
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addr_port_t aport = MACH_PORT_NULL;
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error_t err;
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vm_size_t wrote;
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/* Get an address port for the desired destination address. */
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error_t create_address_port (io_t port,
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const struct sockaddr_un *addr,
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socklen_t addr_len,
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addr_port_t *aport)
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{
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error_t err_port;
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if (addr->sun_family == AF_LOCAL)
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{
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char *name = _hurd_sun_path_dupa (addr, addr_len);
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/* For the local domain, we must look up the name as a file and talk
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to it with the ifsock protocol. */
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file_t file = __file_name_lookup (name, 0, 0);
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if (file == MACH_PORT_NULL)
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return errno;
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err_port = __ifsock_getsockaddr (file, aport);
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__mach_port_deallocate (__mach_task_self (), file);
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if (err_port == MIG_BAD_ID || err_port == EOPNOTSUPP)
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/* The file did not grok the ifsock protocol. */
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err_port = ENOTSOCK;
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}
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else
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{
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err_port = __socket_create_address (port,
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addr->sun_family,
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(char *) addr,
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addr_len,
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aport);
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}
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return err_port;
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}
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err = HURD_DPORT_USE_CANCEL (fd,
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({
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if (addr != NULL)
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err = create_address_port (port, addr, addr_len,
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&aport);
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else
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err = 0;
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if (! err)
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{
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/* Send the data. */
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int cancel_oldtype = LIBC_CANCEL_ASYNC();
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err = __socket_send (port, aport,
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flags, buf, n,
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NULL,
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MACH_MSG_TYPE_COPY_SEND, 0,
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NULL, 0, &wrote);
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LIBC_CANCEL_RESET (cancel_oldtype);
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}
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err;
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}));
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if (aport != MACH_PORT_NULL)
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__mach_port_deallocate (__mach_task_self (), aport);
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return err ? __hurd_sockfail (fd, flags, err) : wrote;
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}
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weak_alias (__sendto, sendto)
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