367 lines
11 KiB
C
367 lines
11 KiB
C
/****************************************************************************
|
|
* 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/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, IOBUSER_NET_SOCK_BLUETOOTH);
|
|
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;
|
|
}
|
|
|
|
/* 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.
|
|
*/
|
|
|
|
nxsem_init(&state.is_sem, 0, 0); /* Doesn't really fail */
|
|
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();
|
|
|
|
/* 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 */
|