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nuttx/wireless/bluetooth/bt_ioctl.c

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/****************************************************************************
* wireless/bluetooth/bt_ioctl.c
* Bluetooth network IOCTL handler
*
* 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 <assert.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/wqueue.h>
#include <nuttx/semaphore.h>
#include <nuttx/net/netdev.h>
#include <nuttx/net/bluetooth.h>
#include <nuttx/wireless/bt_core.h>
#include <nuttx/wireless/bt_hci.h>
#include <nuttx/wireless/bt_ioctl.h>
#include "bt_hcicore.h"
#include "bt_conn.h"
#include "bt_ioctl.h"
#ifdef CONFIG_NETDEV_IOCTL /* Not optional! */
/****************************************************************************
* Public Types
****************************************************************************/
/* These structures encapsulate all globals used by the IOCTL logic. */
/* Scan state variables */
struct btnet_scanstate_s
{
sem_t bs_exclsem; /* Manages exclusive access */
volatile bool bs_scanning; /* True: Scanning in progress */
volatile uint8_t bs_head; /* Head of circular list (for removal) */
uint8_t bs_tail; /* Tail of circular list (for addition) */
struct bt_scanresponse_s bs_rsp[CONFIG_BLUETOOTH_MAXSCANRESULT];
};
/* Discovery state variables. NOTE: This function must be cast-compatible
* with struct bt_gatt_discover_params_s.
*/
struct btnet_discoverstate_s
{
struct bt_gatt_discover_params_s bd_params;
struct bt_uuid_s bd_uuid; /* Discovery UUID */
sem_t bd_exclsem; /* Manages exclusive access */
volatile bool bd_discovering; /* True: Discovery in progress */
volatile uint8_t bd_head; /* Head of circular list (for removal) */
volatile uint8_t bd_tail; /* Tail of circular list (for addition) */
struct bt_discresonse_s bd_rsp[CONFIG_BLUETOOTH_MAXDISCOVER];
};
/* GATT read state variables. */
struct btnet_rdstate_s
{
bool rd_pending; /* True: result not yet received */
uint8_t rd_result; /* The result of the read */
uint8_t rd_head; /* Start of data to read */
uint8_t rd_tail; /* End data to read */
uint8_t rd_data[HCI_GATTRD_DATA]; /* Data read */
};
/****************************************************************************
* Private Data
****************************************************************************/
/* At present only a single Bluetooth device is supported. So we can simply
* maintain the scan, MTU exchange, and discovery states as globals.
*
* NOTE: This limits to a single Bluetooth device with one concurrent scan
* action, one concurrent MTU exchange, and one concurrent discovery action.
*
* REVISIT: A fix might be to (1) allocate instances on each IOCTL command
* the starts an operation, keeping the allocated structures in a list. (2)
* Return a reference number with each such command. That reference number
* would then be used in each IOCTL command that gets the result of the
* previously requested data. (3) The allocated instance would be freed
* wither (1) it is empty or (2) it has expired without being harvested.
*/
static struct btnet_scanstate_s g_scanstate;
static struct btnet_discoverstate_s g_discoverstate;
static struct bt_result_s g_exchangeresult;
static struct btnet_rdstate_s g_rdstate;
static struct bt_result_s g_gattwrresult;
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: btnet_scan_callback
*
* Description:
* This is an HCI callback function. HCI provides scan result data via
* this callback function. The scan result data will be added to the
* cached scan results.
*
* Input Parameters:
* Scan result data
*
* Returned Value:
* None
*
****************************************************************************/
static void btnet_scan_callback(FAR const bt_addr_le_t *addr, int8_t rssi,
uint8_t adv_type, FAR const uint8_t *adv_data,
uint8_t len)
{
FAR struct bt_scanresponse_s *rsp;
uint8_t nexttail;
uint8_t head;
uint8_t tail;
int ret;
if (!g_scanstate.bs_scanning)
{
wlerr("ERROR: Results received while not scanning\n");
return;
}
if (len > CONFIG_BLUETOOTH_MAXSCANDATA)
{
wlerr("ERROR: Scan result is too big: %u\n", len);
return;
}
/* Get exclusive access to the scan data */
while ((ret = nxsem_wait(&g_scanstate.bs_exclsem)) < 0)
{
DEBUGASSERT(ret == -EINTR || ret == -ECANCELED);
if (ret != -EINTR)
{
return;
}
}
/* Add the scan data to the cache */
tail = g_scanstate.bs_tail;
nexttail = tail + 1;
if (nexttail >= CONFIG_BLUETOOTH_MAXSCANRESULT)
{
nexttail = 0;
}
/* Is the circular buffer full? */
head = g_scanstate.bs_head;
if (nexttail == head)
{
wlerr("ERROR: Too many scan results\n");
if (++head >= CONFIG_BLUETOOTH_MAXSCANRESULT)
{
head = 0;
}
g_scanstate.bs_head = head;
}
/* Save the new scan result */
rsp = &g_scanstate.bs_rsp[tail];
memcpy(&rsp->sr_addr, addr, sizeof(bt_addr_le_t));
rsp->sr_rssi = rssi;
rsp->sr_type = adv_type;
rsp->sr_len = len;
memcpy(&rsp->sr_data, adv_data, len);
g_scanstate.bs_tail = nexttail;
nxsem_post(&g_scanstate.bs_exclsem);
}
/****************************************************************************
* Name: btnet_scan_result
*
* Description:
* This function implements the SIOCBTSCANGET IOCTL command. It returns
* the current, buffered discovered handles.
*
* Input Parameters:
* result - Location to return the scan result data
* maxrsp - The maximum number of responses that can be returned.
*
* Returned Value:
* On success, the actual number of scan results obtain is returned. A
* negated errno value is returned on any failure.
*
****************************************************************************/
static int btnet_scan_result(FAR struct bt_scanresponse_s *result,
uint8_t maxrsp)
{
uint8_t head;
uint8_t tail;
uint8_t nrsp;
bool scanning;
int ret;
scanning = g_scanstate.bs_scanning;
wlinfo("Scanning? %s\n", scanning ? "YES" : "NO");
/* Get exclusive access to the scan data while we are actively scanning.
* The semaphore is uninitialized in other cases.
*/
if (scanning)
{
/* Get exclusive access to the scan data */
ret = nxsem_wait(&g_scanstate.bs_exclsem);
if (ret < 0)
{
DEBUGASSERT(ret == -EINTR || ret == -ECANCELED);
return ret;
}
}
/* Copy all available results */
head = g_scanstate.bs_head;
tail = g_scanstate.bs_tail;
for (nrsp = 0; nrsp < maxrsp && head != tail; nrsp++)
{
FAR const uint8_t *src;
FAR uint8_t *dest;
/* Copy data from the head index into the user buffer */
src = (FAR const uint8_t *)&g_scanstate.bs_rsp[head];
dest = (FAR uint8_t *)&result[nrsp];
memcpy(dest, src, sizeof(struct bt_scanresponse_s));
/* Increment the head index */
if (++head >= CONFIG_BLUETOOTH_MAXSCANRESULT)
{
head = 0;
}
}
g_scanstate.bs_head = head;
if (scanning)
{
nxsem_post(&g_scanstate.bs_exclsem);
}
return nrsp;
}
/****************************************************************************
* Name: btnet_exchange_rsp
*
* Description:
* Result of MTU exchange.
*
* Input Parameters:
* conn - The address of the peer in the MTU exchange
* result - The result of the MTU exchange
*
* Returned Value:
* None
*
****************************************************************************/
static void btnet_exchange_rsp(FAR struct bt_conn_s *conn, uint8_t result)
{
wlinfo("Exchange %s\n", result == 0 ? "succeeded" : "failed");
g_exchangeresult.br_pending = false;
g_exchangeresult.br_result = result;
}
/****************************************************************************
* Name: btnet_discover_func
*
* Description:
* GATT discovery callback. This function is called when a new handle is
* discovered
*
* Input Parameters:
* attr - The discovered attributes
* arg - The original discovery parameters
*
* Returned Value:
* BT_GATT_ITER_CONTINUE meaning to continue the iteration.
*
****************************************************************************/
static uint8_t btnet_discover_func(FAR const struct bt_gatt_attr_s *attr,
FAR void *arg)
{
uint8_t nexttail;
uint8_t head;
uint8_t tail;
int ret;
wlinfo("Discovered handle %u\n", attr->handle);
if (!g_discoverstate.bd_discovering)
{
wlerr("ERROR: Results received while not discovering\n");
return BT_GATT_ITER_STOP;
}
/* Get exclusive access to the discovered data */
while ((ret = nxsem_wait(&g_discoverstate.bd_exclsem)) < 0)
{
DEBUGASSERT(ret == -EINTR || ret == -ECANCELED);
if (ret != -EINTR)
{
return BT_GATT_ITER_STOP;
}
}
/* Add the discovered data to the cache */
tail = g_discoverstate.bd_tail;
nexttail = tail + 1;
if (nexttail >= CONFIG_BLUETOOTH_MAXSCANRESULT)
{
nexttail = 0;
}
/* Is the circular buffer full? */
head = g_discoverstate.bd_head;
if (nexttail == head)
{
wlerr("ERROR: Too many handles discovered. Data lost.\n");
if (++head >= CONFIG_BLUETOOTH_MAXSCANRESULT)
{
head = 0;
}
g_discoverstate.bd_head = head;
}
/* Save the newly discovered handle */
g_discoverstate.bd_rsp[tail].dr_handle = attr->handle;
g_discoverstate.bd_rsp[tail].dr_perm = attr->perm;
g_discoverstate.bd_tail = nexttail;
nxsem_post(&g_discoverstate.bd_exclsem);
return BT_GATT_ITER_CONTINUE;
}
/****************************************************************************
* Name: btnet_discover_destroy
*
* Description:
* GATT destroy callback. This function is called when a discovery
* completes.
*
* Input Parameters:
* arg - The original discovery parameters
*
* Returned Value:
* None
*
****************************************************************************/
static void btnet_discover_destroy(FAR void *arg)
{
FAR struct bt_gatt_discover_params *params = arg;
/* There is nothing that needs to be down here. The parameters were
* allocated on the stack and are long gone.
*/
wlinfo("Discover destroy. params %p\n", params);
DEBUGASSERT(params != NULL && g_discoverstate.bd_discovering);
UNUSED(params);
memset(&g_discoverstate.bd_params, 0, sizeof(struct btnet_discoverstate_s));
nxsem_destroy(&g_discoverstate.bd_exclsem);
g_discoverstate.bd_discovering = false;
}
/****************************************************************************
* Name: btnet_discover_result
*
* Description:
* This function implements the SIOCBTDISCGET IOCTL command. It returns
* the current, buffered discovered handles.
*
* Input Parameters:
* result - Location to return the discovery result data
* maxrsp - The maximum number of responses that can be returned.
*
* Returned Value:
* On success, the actual number of discovery results obtain is returned. A
* negated errno value is returned on any failure.
*
****************************************************************************/
static int btnet_discover_result(FAR struct bt_discresonse_s *result,
uint8_t maxrsp)
{
uint8_t head;
uint8_t tail;
uint8_t nrsp;
bool discovering;
int ret;
discovering = g_discoverstate.bd_discovering;
wlinfo("Discovering? %s\n", discovering ? "YES" : "NO");
/* Get exclusive access to the discovery data while we are actively
* discovering. The semaphore is uninitialized in other cases.
*/
if (discovering)
{
ret = nxsem_wait(&g_discoverstate.bd_exclsem);
if (ret < 0)
{
DEBUGASSERT(ret == -EINTR || ret == -ECANCELED);
return ret;
}
}
/* Copy all available results */
head = g_discoverstate.bd_head;
tail = g_discoverstate.bd_tail;
for (nrsp = 0; nrsp < maxrsp && head != tail; nrsp++)
{
/* Copy data from the head index into the user buffer */
result[nrsp].dr_handle = g_discoverstate.bd_rsp[head].dr_handle;
result[nrsp].dr_perm = g_discoverstate.bd_rsp[head].dr_perm;
/* Increment the head index */
if (++head >= CONFIG_BLUETOOTH_MAXDISCOVER)
{
head = 0;
}
}
g_discoverstate.bd_head = head;
if (discovering)
{
nxsem_post(&g_discoverstate.bd_exclsem);
}
return nrsp;
}
/****************************************************************************
* Name: btnet_read_callback
*
* Description:
* Handle network IOCTL commands directed to this device.
*
* Input Parameters:
* conn - Connection of read
* result - The result status of the read.
* data - The data read
* length - The Number of bytes read
*
* Returned Value:
* None
*
****************************************************************************/
static void btnet_read_callback(FAR struct bt_conn_s *conn, int result,
FAR const void *data, uint16_t length)
{
wlinfo("Read complete: result %d length %u\n", result, length);
DEBUGASSERT(conn != NULL && g_rdstate.rd_pending);
if (length > HCI_GATTRD_DATA)
{
g_rdstate.rd_result = ENFILE;
}
else
{
DEBUGASSERT((unsigned int)result < UINT8_MAX);
g_rdstate.rd_result = result;
g_rdstate.rd_head = 0;
g_rdstate.rd_tail = length;
memcpy(g_rdstate.rd_data, data, length);
}
g_rdstate.rd_pending = false;
}
/****************************************************************************
* Name: btnet_read_result
*
* Description:
* Handle network IOCTL commands directed to this device.
*
* Input Parameters:
* btreq - IOCTL command data
*
* Returned Value:
* OK on success; Negated errno on failure.
*
****************************************************************************/
static int btnet_read_result(FAR struct btreq_s *btreq)
{
int head;
int rdlen;
DEBUGASSERT(btreq != NULL && btreq->btr_rddata != NULL);
/* Is the read complete? */
btreq->btr_rdpending = g_rdstate.rd_pending;
if (!g_rdstate.rd_pending)
{
return -EBUSY;
}
/* Yes... return the read data */
head = g_rdstate.rd_head;
if (head >= g_rdstate.rd_tail)
{
return -ENODATA;
}
rdlen = btreq->btr_rdsize;
if (rdlen + head >= g_rdstate.rd_tail)
{
rdlen = g_rdstate.rd_tail - head;
}
btreq->btr_rdresult = g_rdstate.rd_result;
btreq->btr_rdsize = rdlen;
memcpy(btreq->btr_rddata, &g_rdstate.rd_data[head], rdlen);
g_rdstate.rd_head = head + rdlen;
return OK;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: btnet_ioctl
*
* Description:
* Handle network IOCTL commands directed to this device.
*
* Input Parameters:
* netdev - Reference to the NuttX driver state structure
* cmd - The IOCTL command
* arg - The argument for the IOCTL command
*
* Returned Value:
* OK on success; Negated errno on failure.
*
****************************************************************************/
int btnet_ioctl(FAR struct net_driver_s *netdev, int cmd, unsigned long arg)
{
FAR struct btreq_s *btreq = (FAR struct btreq_s *)((uintptr_t)arg);
int ret;
wlinfo("cmd=%04x arg=%ul\n", cmd, arg);
DEBUGASSERT(netdev != NULL && netdev->d_private != NULL);
if (btreq == NULL)
{
return -EINVAL;
}
wlinfo("ifname: %s\n", btreq->btr_name);
/* Process the command */
switch (cmd)
{
/* SIOCGBTINFO: Get Bluetooth device Info. Given the device name,
* fill in the btreq_s structure.
*
* REVISIT: Little more than a stub at present. It does return the
* device address associated with the device name which in itself is
* important.
*/
case SIOCGBTINFO:
{
memset(&btreq->btru.btri, 0, sizeof(btreq->btru.btri));
BLUETOOTH_ADDRCOPY(btreq->btr_bdaddr.val, g_btdev.bdaddr.val);
btreq->btr_num_cmd = CONFIG_BLUETOOTH_BUFFER_PREALLOC;
btreq->btr_num_acl = CONFIG_BLUETOOTH_BUFFER_PREALLOC;
btreq->btr_acl_mtu = BLUETOOTH_MAX_MTU;
btreq->btr_sco_mtu = BLUETOOTH_MAX_MTU;
btreq->btr_max_acl = CONFIG_IOB_NBUFFERS;
ret = OK;
}
break;
/* SIOCGBTFEAT
* Get Bluetooth BR/BDR device Features. This returns the cached
* basic (page 0) and extended (page 1 & 2) features. Only page 0
* is valid.
* SIOCGBTLEFEAT
* Get Bluetooth LE device Features. This returns the cached page
* 0-2 features. Only page 0 is value.
*/
case SIOCGBTFEAT:
case SIOCGBTLEFEAT:
{
FAR const uint8_t *src;
memset(&btreq->btru.btrf, 0, sizeof(btreq->btru.btrf));
if (cmd == SIOCGBTFEAT)
{
src = g_btdev.features;
}
else
{
src = g_btdev.le_features;
}
memcpy(btreq->btr_features0, src, 8);
ret = OK;
}
break;
/* SIOCBTADVSTART: Set advertisement data, scan response data,
* advertisement parameters and start advertising.
*/
case SIOCBTADVSTART:
{
ret = bt_start_advertising(btreq->btr_advtype,
btreq->btr_advad,
btreq->btr_advad);
wlinfo("Start advertising: %d\n", ret);
}
break;
/* SIOCBTADVSTOP: Stop advertising. */
case SIOCBTADVSTOP:
{
wlinfo("Stop advertising\n");
bt_stop_advertising();
ret = OK;
}
break;
/* SIOCBTSCANSTART: Start LE scanning. Buffered scan results may be
* obtained via SIOCBTSCANGET
*/
case SIOCBTSCANSTART:
{
/* Are we already scanning? */
if (g_scanstate.bs_scanning)
{
wlwarn("WARNING: Already scanning\n");
ret = -EBUSY;
}
else
{
/* Initialize scan state */
nxsem_init(&g_scanstate.bs_exclsem, 0, 1);
g_scanstate.bs_scanning = true;
g_scanstate.bs_head = 0;
g_scanstate.bs_tail = 0;
ret = bt_start_scanning(btreq->btr_dupenable,
btnet_scan_callback);
wlinfo("Start scan: %d\n", ret);
if (ret < 0)
{
nxsem_destroy(&g_scanstate.bs_exclsem);
g_scanstate.bs_scanning = false;
}
}
}
break;
/* SIOCBTSCANGET: Return scan results buffered since the call time
* that the SIOCBTSCANGET command was invoked.
*/
case SIOCBTSCANGET:
{
ret = btnet_scan_result(btreq->btr_rsp, btreq->btr_nrsp);
wlinfo("Get scan results: %d\n", ret);
if (ret >= 0)
{
btreq->btr_nrsp = ret;
ret = OK;
}
}
break;
/* SIOCBTSCANSTOP: Stop LE scanning and discard any buffered results. */
case SIOCBTSCANSTOP:
{
/* Stop scanning */
ret = bt_stop_scanning();
wlinfo("Stop scanning: %d\n", ret);
nxsem_destroy(&g_scanstate.bs_exclsem);
g_scanstate.bs_scanning = false;
}
break;
/* SIOCBTSECURITY: Enable security for a connection. */
case SIOCBTSECURITY:
{
FAR struct bt_conn_s *conn;
/* Get the connection associated with the provided LE address */
conn = bt_conn_lookup_addr_le(&btreq->btr_secaddr);
if (conn == NULL)
{
wlwarn("WARNING: Peer not connected\n");
ret = -ENOTCONN;
}
else
{
ret = bt_conn_security(conn, btreq->btr_seclevel);
if (ret < 0)
{
wlerr("ERROR: Security setting failed: %d\n", ret);
}
bt_conn_release(conn);
}
}
break;
/* SIOCBTEXCHANGE: Exchange MTUs */
case SIOCBTEXCHANGE:
{
/* Check if we are still waiting for the result of the last exchange */
if (g_exchangeresult.br_pending)
{
wlwarn("WARNING: Last exchange not yet complete\n");
ret = -EBUSY;
}
else
{
FAR struct bt_conn_s *conn;
/* Get the connection associated with the provided LE address */
conn = bt_conn_lookup_addr_le(&btreq->btr_expeer);
if (conn == NULL)
{
wlwarn("WARNING: Peer not connected\n");
ret = -ENOTCONN;
}
else
{
ret = bt_gatt_exchange_mtu(conn, btnet_exchange_rsp);
if (ret == OK)
{
g_exchangeresult.br_pending = true;
g_exchangeresult.br_result = EBUSY;
}
bt_conn_release(conn);
}
}
}
break;
/* SIOCBTEXRESULT: Get the result of the MTU exchange */
case SIOCBTEXRESULT:
{
btreq->btr_expending = g_exchangeresult.br_pending;
btreq->btr_exresult = g_exchangeresult.br_result;
ret = OK;
}
break;
/* SIOCBTDISCOVER: Starts GATT discovery */
case SIOCBTDISCOVER:
{
FAR struct bt_conn_s *conn;
/* Check if discovery is already in progress */
if (g_discoverstate.bd_discovering)
{
wlwarn("WARNING: Discovery is already in progress\n");
ret = -EBUSY;
}
else
{
/* Get the connection associated with the provided LE address */
conn = bt_conn_lookup_addr_le(&btreq->btr_dpeer);
if (conn == NULL)
{
wlwarn("WARNING: Peer not connected\n");
ret = -ENOTCONN;
}
else
{
FAR struct bt_gatt_discover_params_s *params;
/* Set up the query */
g_discoverstate.bd_uuid.type = BT_UUID_16;
g_discoverstate.bd_uuid.u.u16 = btreq->btr_duuid16;
params = &g_discoverstate.bd_params;
params->uuid = &g_discoverstate.bd_uuid;
params->func = btnet_discover_func;
params->destroy = btnet_discover_destroy;
params->start_handle = btreq->btr_dstart;
params->end_handle = btreq->btr_dend;
nxsem_init(&g_discoverstate.bd_exclsem, 0, 1);
g_discoverstate.bd_discovering = true;
g_discoverstate.bd_head = 0;
g_discoverstate.bd_tail = 0;
/* Start the query */
switch (btreq->btr_dtype)
{
case GATT_DISCOVER:
ret = bt_gatt_discover(conn, params);
break;
case GATT_DISCOVER_DESC:
ret = bt_gatt_discover_descriptor(conn, params);
break;
case GATT_DISCOVER_CHAR:
ret = bt_gatt_discover_characteristic(conn, params);
break;
default:
wlerr("ERROR: Unrecognized GATT discover type: %u\n",
btreq->btr_dtype);
ret = -EINVAL;
}
if (ret < 0)
{
wlerr("ERROR: Failed to start discovery: %d\n", ret);
btnet_discover_destroy(params);
}
bt_conn_release(conn);
}
}
}
break;
/* SIOCBTDISCGET: Return discovered results buffered since the call time
* that the SIOCBTDISCGET command was invoked.
*/
case SIOCBTDISCGET:
{
ret = btnet_discover_result(btreq->btr_grsp, btreq->btr_gnrsp);
wlinfo("Get discovery results: %d\n", ret);
if (ret >= 0)
{
btreq->btr_nrsp = ret;
ret = OK;
}
}
break;
/* SIOCBTGATTRD: Initiate read of GATT data */
case SIOCBTGATTRD:
{
/* Is there already a read in progress? The current
* implementation can support only one read at a time.
* REVISIT.. see suggested design improvement above.
*/
if (g_rdstate.rd_pending)
{
wlwarn("WARNING: Read pending\n");
ret = -EBUSY;
}
else
{
FAR struct bt_conn_s *conn;
/* Get the connection associated with the provided LE address */
conn = bt_conn_lookup_addr_le(&btreq->btr_rdpeer);
if (conn == NULL)
{
wlwarn("WARNING: Peer not connected\n");
ret = -ENOTCONN;
}
else
{
/* Set up for the read */
g_rdstate.rd_pending = true;
g_rdstate.rd_head = 0;
g_rdstate.rd_tail = 0;
/* Initiate read.. single or multiple? */
if (btreq->btr_rdnhandles == 1)
{
/* Read single */
ret = bt_gatt_read(conn, btreq->btr_rdhandles[0],
btreq->btr_rdoffset,
btnet_read_callback);
}
else if (btreq->btr_rdnhandles < HCI_GATT_MAXHANDLES)
{
/* Read multiple */
DEBUGASSERT(btreq->btr_rdnhandles > 0);
ret = bt_gatt_read_multiple(conn, btreq->btr_rdhandles,
btreq->btr_rdnhandles,
btnet_read_callback);
}
else
{
ret = -ENFILE;
}
if (ret < 0)
{
wlerr("ERROR: Read operation failed: %d\n", ret);
}
bt_conn_release(conn);
}
}
}
break;
/* SIOCBTGATTRDGET: Get the result of the GATT data read */
case SIOCBTGATTRDGET:
{
ret = btnet_read_result(btreq);
wlinfo("Get read results: %d\n", ret);
}
break;
/* SIOCBTGATTWR: Write GATT data */
case SIOCBTGATTWR:
{
ret = -ENOSYS;
}
break;
/* SIOCBTGATTWRGET: Get the result of the GATT data write */
case SIOCBTGATTWRGET:
{
btreq->btr_wrpending = g_gattwrresult.br_pending;
btreq->btr_wrresult = g_gattwrresult.br_result;
ret = OK;
}
break;
default:
wlwarn("WARNING: Unrecognized IOCTL command: %02x\n", cmd);
ret = -ENOTTY;
break;
}
return ret;
}
#endif /* CONFIG_NETDEV_IOCTL */
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