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- /****************************************************************************
- * net/local/local_sendto.c
- *
- * Copyright (C) 2015, 2017 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #if defined(CONFIG_NET) && defined(CONFIG_NET_LOCAL_DGRAM)
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <unistd.h>
- #include <errno.h>
- #include <assert.h>
- #include <debug.h>
- #include <nuttx/net/net.h>
- #include "socket/socket.h"
- #include "local/local.h"
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: psock_local_sendto
- *
- * Description:
- * This function implements the Unix domain-specific logic of the
- * standard sendto() socket operation.
- *
- * Input Parameters:
- * psock A pointer to a NuttX-specific, internal socket structure
- * buf Data to send
- * len Length of data to send
- * flags Send flags
- * to Address of recipient
- * tolen The length of the address structure
- *
- * NOTE: All input parameters were verified by sendto() before this
- * function was called.
- *
- * Returned Value:
- * On success, returns the number of characters sent. On error,
- * a negated errno value is returned. See the description in
- * net/socket/sendto.c for the list of appropriate return value.
- *
- ****************************************************************************/
- ssize_t psock_local_sendto(FAR struct socket *psock, FAR const void *buf,
- size_t len, int flags, FAR const struct sockaddr *to,
- socklen_t tolen)
- {
- FAR struct local_conn_s *conn = (FAR struct local_conn_s *)psock->s_conn;
- FAR struct sockaddr_un *unaddr = (FAR struct sockaddr_un *)to;
- ssize_t nsent;
- int ret;
- /* We keep packet sizes in a uint16_t, so there is a upper limit to the
- * 'len' that can be supported.
- */
- DEBUGASSERT(buf && len <= UINT16_MAX);
- /* Verify that this is not a connected peer socket. It need not be
- * bound, however. If unbound, recvfrom will see this as a nameless
- * connection.
- */
- if (conn->lc_state != LOCAL_STATE_UNBOUND &&
- conn->lc_state != LOCAL_STATE_BOUND)
- {
- /* Either not bound to address or it is connected */
- nerr("ERROR: Connected state\n");
- return -EISCONN;
- }
- /* The outgoing FIFO should not be open */
- DEBUGASSERT(conn->lc_outfile.f_inode == 0);
- /* At present, only standard pathname type address are support */
- if (tolen < sizeof(sa_family_t) + 2)
- {
- /* EFAULT - An invalid user space address was specified for a parameter */
- return -EFAULT;
- }
- /* Make sure that half duplex FIFO has been created.
- * REVISIT: Or should be just make sure that it already exists?
- */
- ret = local_create_halfduplex(conn, unaddr->sun_path);
- if (ret < 0)
- {
- nerr("ERROR: Failed to create FIFO for %s: %d\n",
- conn->lc_path, ret);
- return ret;
- }
- /* Open the sending side of the transfer */
- ret = local_open_sender(conn, unaddr->sun_path,
- _SS_ISNONBLOCK(psock->s_flags));
- if (ret < 0)
- {
- nerr("ERROR: Failed to open FIFO for %s: %d\n",
- unaddr->sun_path, ret);
- nsent = ret;
- goto errout_with_halfduplex;
- }
- /* Send the packet */
- nsent = local_send_packet(&conn->lc_outfile, buf, len);
- if (nsent < 0)
- {
- nerr("ERROR: Failed to send the packet: %d\n", ret);
- }
- else
- {
- /* local_send_packet returns 0 if all 'len' bytes were sent */
- nsent = len;
- }
- /* Now we can close the write-only socket descriptor */
- file_close(&conn->lc_outfile);
- conn->lc_outfile.f_inode = NULL;
- errout_with_halfduplex:
- /* Release our reference to the half duplex FIFO */
- (void)local_release_halfduplex(conn);
- return nsent;
- }
- #endif /* CONFIG_NET && CONFIG_NET_LOCAL_DGRAM */
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