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- /****************************************************************************
- * net/bluetooth/bluetooth_sendto.c
- *
- * Copyright (C) 2018 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>
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <stdint.h>
- #include <stdbool.h>
- #include <string.h>
- #include <errno.h>
- #include <assert.h>
- #include <debug.h>
- #include <netpacket/bluetooth.h>
- #include <arch/irq.h>
- #include <nuttx/clock.h>
- #include <nuttx/semaphore.h>
- #include <nuttx/mm/iob.h>
- #include <nuttx/net/radiodev.h>
- #include <nuttx/net/bluetooth.h>
- #include <nuttx/net/net.h>
- #include <nuttx/net/ip.h>
- #include <nuttx/wireless/bluetooth/bt_hci.h>
- #include "utils/utils.h"
- #include "netdev/netdev.h"
- #include "devif/devif.h"
- #include "socket/socket.h"
- #include "bluetooth/bluetooth.h"
- #ifdef CONFIG_NET_BLUETOOTH
- /****************************************************************************
- * Private Types
- ****************************************************************************/
- /* This structure holds the state of the send operation until it can be
- * operated upon from the event handler.
- */
- struct bluetooth_sendto_s
- {
- FAR struct socket *is_sock; /* Points to the parent socket structure */
- FAR struct devif_callback_s *is_cb; /* Reference to callback instance */
- bt_addr_t is_destaddr; /* Frame destination address */
- uint8_t is_channel; /* Frame destination channel */
- sem_t is_sem; /* Used to wake up the waiting thread */
- FAR const uint8_t *is_buffer; /* User buffer of data to send */
- size_t is_buflen; /* Number of bytes in the is_buffer */
- ssize_t is_sent; /* The number of bytes sent (or error) */
- };
- /****************************************************************************
- * Private Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: bluetooth_sendto_eventhandler
- ****************************************************************************/
- static uint16_t bluetooth_sendto_eventhandler(FAR struct net_driver_s *dev,
- FAR void *pvconn,
- FAR void *pvpriv,
- uint16_t flags)
- {
- FAR struct radio_driver_s *radio;
- FAR struct bluetooth_sendto_s *pstate;
- struct bluetooth_frame_meta_s meta;
- FAR struct iob_s *iob;
- int hdrlen;
- int ret;
- DEBUGASSERT(pvpriv != NULL && dev != NULL && pvconn != NULL);
- /* Ignore polls from non Bluetooth network drivers */
- if (dev->d_lltype != NET_LL_BLUETOOTH)
- {
- return flags;
- }
- /* Make sure that this is the driver to which the socket is connected. */
- #warning Missing logic
- pstate = (FAR struct bluetooth_sendto_s *)pvpriv;
- radio = (FAR struct radio_driver_s *)dev;
- ninfo("flags: %04x sent: %d\n", flags, pstate->is_sent);
- if (pstate != NULL && (flags & BLUETOOTH_POLL) != 0)
- {
- /* Initialize the meta data */
- BLUETOOTH_ADDRCOPY(&meta.bm_raddr, &pstate->is_destaddr);
- meta.bm_channel = pstate->is_channel;
- /* Get the Bluetooth MAC header length */
- hdrlen = radio->r_get_mhrlen(radio, &meta);
- if (hdrlen < 0)
- {
- nerr("ERROR: Failed to get header length: %d\n", hdrlen);
- ret = hdrlen;
- goto errout;
- }
- /* Verify that the user buffer can fit within the frame with this
- * MAC header.
- */
- DEBUGASSERT(BLUETOOTH_MAX_FRAMELEN <= CONFIG_IOB_BUFSIZE);
- if (pstate->is_buflen + hdrlen > BLUETOOTH_MAX_FRAMELEN)
- {
- nerr("ERROR: User buffer will not fit into the frame: %u > %u\n",
- (unsigned int)(pstate->is_buflen + hdrlen),
- (unsigned int)CONFIG_IOB_BUFSIZE);
- ret = -E2BIG;
- goto errout;
- }
- /* Allocate an IOB to hold the frame data */
- iob = net_ioballoc(false);
- if (iob == NULL)
- {
- nwarn("WARNING: Failed to allocate IOB\n");
- return flags;
- }
- /* Initialize the IOB */
- iob->io_offset = hdrlen;
- iob->io_len = pstate->is_buflen + hdrlen;
- iob->io_pktlen = pstate->is_buflen + hdrlen;
- /* Copy the user data into the IOB */
- memcpy(&iob->io_data[hdrlen], pstate->is_buffer, pstate->is_buflen);
- /* And submit the IOB to the network driver */
- ret = radio->r_req_data(radio, &meta, iob);
- if (ret < 0)
- {
- nerr("ERROR: r_req_data() failed: %d\n", ret);
- goto errout;
- }
- /* Save the successful result */
- pstate->is_sent = pstate->is_buflen;
- /* Don't allow any further call backs. */
- pstate->is_cb->flags = 0;
- pstate->is_cb->priv = NULL;
- pstate->is_cb->event = NULL;
- /* Wake up the waiting thread */
- nxsem_post(&pstate->is_sem);
- }
- return flags;
- errout:
- /* Don't allow any further call backs. */
- pstate->is_cb->flags = 0;
- pstate->is_cb->priv = NULL;
- pstate->is_cb->event = NULL;
- pstate->is_sent = ret;
- /* Wake up the waiting thread */
- nxsem_post(&pstate->is_sem);
- return flags;
- }
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: psock_bluetooth_sendto
- *
- * Description:
- * If sendto() is used on a connection-mode (SOCK_STREAM, SOCK_SEQPACKET)
- * socket, the parameters to and 'tolen' are ignored (and the error EISCONN
- * may be returned when they are not NULL and 0), and the error ENOTCONN is
- * returned when the socket was not actually connected.
- *
- * 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
- *
- * Returned Value:
- * On success, returns the number of characters sent. On error,
- * a negated errno value is retruend. See sendto() for the complete list
- * of return values.
- *
- ****************************************************************************/
- ssize_t psock_bluetooth_sendto(FAR struct socket *psock, FAR const void *buf,
- size_t len, int flags,
- FAR const struct sockaddr *to, socklen_t tolen)
- {
- FAR struct sockaddr_bt_s *destaddr;
- FAR struct radio_driver_s *radio;
- FAR struct bluetooth_conn_s *conn;
- struct bluetooth_sendto_s state;
- int ret = OK;
- /* Verify that the sockfd corresponds to valid, allocated socket */
- if (psock == NULL || psock->s_crefs <= 0)
- {
- return -EBADF;
- }
- conn = (FAR struct bluetooth_conn_s *)psock->s_conn;
- DEBUGASSERT(conn != NULL);
- /* Verify that the address is large enough to be a valid PF_BLUETOOTH
- * address.
- */
- if (tolen < sizeof(bt_addr_t))
- {
- return -EDESTADDRREQ;
- }
- /* Get the device driver that will service this transfer */
- radio = bluetooth_find_device(conn, &conn->bc_laddr);
- if (radio == NULL)
- {
- return -ENODEV;
- }
- /* Set the socket state to sending */
- psock->s_flags = _SS_SETSTATE(psock->s_flags, _SF_SEND);
- /* Perform the send operation */
- /* Initialize the state structure. This is done with the network locked
- * because we don't want anything to happen until we are ready.
- */
- net_lock();
- memset(&state, 0, sizeof(struct bluetooth_sendto_s));
- /* This semaphore is used for signaling and, hence, should not have
- * priority inheritance enabled.
- */
- (void)nxsem_init(&state.is_sem, 0, 0); /* Doesn't really fail */
- (void)nxsem_setprotocol(&state.is_sem, SEM_PRIO_NONE);
- state.is_sock = psock; /* Socket descriptor to use */
- state.is_buflen = len; /* Number of bytes to send */
- state.is_buffer = buf; /* Buffer to send from */
- /* Copy the destination address */
- destaddr = (FAR struct sockaddr_bt_s *)to;
- memcpy(&state.is_destaddr, &destaddr->bt_bdaddr,
- sizeof(bt_addr_t));
- if (len > 0)
- {
- /* Allocate resource to receive a callback */
- state.is_cb = bluetooth_callback_alloc(&radio->r_dev, conn);
- if (state.is_cb)
- {
- /* Set up the callback in the connection */
- state.is_cb->flags = PKT_POLL;
- state.is_cb->priv = (FAR void *)&state;
- state.is_cb->event = bluetooth_sendto_eventhandler;
- /* Notify the device driver that new TX data is available. */
- netdev_txnotify_dev(&radio->r_dev);
- /* Wait for the send to complete or an error to occur.
- * net_lockedwait will also terminate if a signal is received.
- */
- ret = net_lockedwait(&state.is_sem);
- /* Make sure that no further events are processed */
- bluetooth_callback_free(&radio->r_dev, conn, state.is_cb);
- }
- }
- nxsem_destroy(&state.is_sem);
- net_unlock();
- /* Set the socket state to idle */
- psock->s_flags = _SS_SETSTATE(psock->s_flags, _SF_IDLE);
- /* Check for a errors, Errors are signaled by negative errno values
- * for the send length
- */
- if (state.is_sent < 0)
- {
- return state.is_sent;
- }
- /* If net_lockedwait failed, then we were probably reawakened by a signal. In
- * this case, net_lockedwait will have returned negated errno appropriately.
- */
- if (ret < 0)
- {
- return ret;
- }
- /* Return the number of bytes actually sent */
- return state.is_sent;
- }
- #endif /* CONFIG_NET_BLUETOOTH */
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