/******************************************************************************
*
* Copyright 2003-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* This file contains the GATT client utility function.
*
******************************************************************************/
#define LOG_TAG "bt_bta_gattc"
#include "bt_target.h"
#include <base/logging.h>
#include <string.h>
#include "bt_common.h"
#include "bta_gattc_int.h"
#include "bta_sys.h"
#include "l2c_api.h"
#include "utl.h"
/*******************************************************************************
*
* Function bta_gattc_cl_get_regcb
*
* Description get registration control block by client interface.
*
* Returns pointer to the regcb
*
******************************************************************************/
tBTA_GATTC_RCB* bta_gattc_cl_get_regcb(uint8_t client_if) {
uint8_t i = 0;
tBTA_GATTC_RCB* p_clrcb = &bta_gattc_cb.cl_rcb[0];
for (i = 0; i < BTA_GATTC_CL_MAX; i++, p_clrcb++) {
if (p_clrcb->in_use && p_clrcb->client_if == client_if) return p_clrcb;
}
return NULL;
}
/*******************************************************************************
*
* Function bta_gattc_num_reg_app
*
* Description find the number of registered application.
*
* Returns pointer to the regcb
*
******************************************************************************/
uint8_t bta_gattc_num_reg_app(void) {
uint8_t i = 0, j = 0;
for (i = 0; i < BTA_GATTC_CL_MAX; i++) {
if (bta_gattc_cb.cl_rcb[i].in_use) j++;
}
return j;
}
/*******************************************************************************
*
* Function bta_gattc_find_clcb_by_cif
*
* Description get clcb by client interface and remote bd adddress
*
* Returns pointer to the clcb
*
******************************************************************************/
tBTA_GATTC_CLCB* bta_gattc_find_clcb_by_cif(uint8_t client_if,
const RawAddress& remote_bda,
tBTA_TRANSPORT transport) {
tBTA_GATTC_CLCB* p_clcb = &bta_gattc_cb.clcb[0];
uint8_t i;
for (i = 0; i < BTA_GATTC_CLCB_MAX; i++, p_clcb++) {
if (p_clcb->in_use && p_clcb->p_rcb->client_if == client_if &&
p_clcb->transport == transport && p_clcb->bda == remote_bda)
return p_clcb;
}
return NULL;
}
/*******************************************************************************
*
* Function bta_gattc_find_clcb_by_conn_id
*
* Description get clcb by connection ID
*
* Returns pointer to the clcb
*
******************************************************************************/
tBTA_GATTC_CLCB* bta_gattc_find_clcb_by_conn_id(uint16_t conn_id) {
tBTA_GATTC_CLCB* p_clcb = &bta_gattc_cb.clcb[0];
uint8_t i;
for (i = 0; i < BTA_GATTC_CLCB_MAX; i++, p_clcb++) {
if (p_clcb->in_use && p_clcb->bta_conn_id == conn_id) return p_clcb;
}
return NULL;
}
/*******************************************************************************
*
* Function bta_gattc_clcb_alloc
*
* Description allocate CLCB
*
* Returns pointer to the clcb
*
******************************************************************************/
tBTA_GATTC_CLCB* bta_gattc_clcb_alloc(tGATT_IF client_if,
const RawAddress& remote_bda,
tBTA_TRANSPORT transport) {
uint8_t i_clcb = 0;
tBTA_GATTC_CLCB* p_clcb = NULL;
for (i_clcb = 0; i_clcb < BTA_GATTC_CLCB_MAX; i_clcb++) {
if (!bta_gattc_cb.clcb[i_clcb].in_use) {
#if (BTA_GATT_DEBUG == TRUE)
VLOG(1) << __func__ << ": found clcb:" << +i_clcb << " available";
#endif
p_clcb = &bta_gattc_cb.clcb[i_clcb];
p_clcb->in_use = true;
p_clcb->status = GATT_SUCCESS;
p_clcb->transport = transport;
p_clcb->bda = remote_bda;
p_clcb->p_rcb = bta_gattc_cl_get_regcb(client_if);
p_clcb->p_srcb = bta_gattc_find_srcb(remote_bda);
if (p_clcb->p_srcb == NULL)
p_clcb->p_srcb = bta_gattc_srcb_alloc(remote_bda);
if (p_clcb->p_rcb != NULL && p_clcb->p_srcb != NULL) {
p_clcb->p_srcb->num_clcb++;
p_clcb->p_rcb->num_clcb++;
} else {
/* release this clcb if clcb or srcb allocation failed */
p_clcb->in_use = false;
p_clcb = NULL;
}
break;
}
}
return p_clcb;
}
/*******************************************************************************
*
* Function bta_gattc_find_alloc_clcb
*
* Description find or allocate CLCB if not found.
*
* Returns pointer to the clcb
*
******************************************************************************/
tBTA_GATTC_CLCB* bta_gattc_find_alloc_clcb(tGATT_IF client_if,
const RawAddress& remote_bda,
tBTA_TRANSPORT transport) {
tBTA_GATTC_CLCB* p_clcb;
p_clcb = bta_gattc_find_clcb_by_cif(client_if, remote_bda, transport);
if (p_clcb == NULL) {
p_clcb = bta_gattc_clcb_alloc(client_if, remote_bda, transport);
}
return p_clcb;
}
/*******************************************************************************
*
* Function bta_gattc_clcb_dealloc
*
* Description Deallocte a clcb
*
* Returns pointer to the clcb
*
******************************************************************************/
void bta_gattc_clcb_dealloc(tBTA_GATTC_CLCB* p_clcb) {
if (!p_clcb) {
LOG(ERROR) << __func__ << " p_clcb=NULL";
return;
}
tBTA_GATTC_SERV* p_srcb = p_clcb->p_srcb;
if (p_srcb->num_clcb) p_srcb->num_clcb--;
if (p_clcb->p_rcb->num_clcb) p_clcb->p_rcb->num_clcb--;
/* if the srcb is no longer needed, reset the state */
if (p_srcb->num_clcb == 0) {
p_srcb->connected = false;
p_srcb->state = BTA_GATTC_SERV_IDLE;
p_srcb->mtu = 0;
// clear reallocating
p_srcb->gatt_database.Clear();
}
osi_free_and_reset((void**)&p_clcb->p_q_cmd);
memset(p_clcb, 0, sizeof(tBTA_GATTC_CLCB));
}
/*******************************************************************************
*
* Function bta_gattc_find_srcb
*
* Description find server cache by remote bd address currently in use
*
* Returns pointer to the server cache.
*
******************************************************************************/
tBTA_GATTC_SERV* bta_gattc_find_srcb(const RawAddress& bda) {
tBTA_GATTC_SERV* p_srcb = &bta_gattc_cb.known_server[0];
uint8_t i;
for (i = 0; i < BTA_GATTC_KNOWN_SR_MAX; i++, p_srcb++) {
if (p_srcb->in_use && p_srcb->server_bda == bda) return p_srcb;
}
return NULL;
}
/*******************************************************************************
*
* Function bta_gattc_find_srvr_cache
*
* Description find server cache by remote bd address
*
* Returns pointer to the server cache.
*
******************************************************************************/
tBTA_GATTC_SERV* bta_gattc_find_srvr_cache(const RawAddress& bda) {
tBTA_GATTC_SERV* p_srcb = &bta_gattc_cb.known_server[0];
uint8_t i;
for (i = 0; i < BTA_GATTC_KNOWN_SR_MAX; i++, p_srcb++) {
if (p_srcb->server_bda == bda) return p_srcb;
}
return NULL;
}
/*******************************************************************************
*
* Function bta_gattc_find_scb_by_cid
*
* Description find server control block by connection ID
*
* Returns pointer to the server cache.
*
******************************************************************************/
tBTA_GATTC_SERV* bta_gattc_find_scb_by_cid(uint16_t conn_id) {
tBTA_GATTC_CLCB* p_clcb = bta_gattc_find_clcb_by_conn_id(conn_id);
if (p_clcb)
return p_clcb->p_srcb;
else
return NULL;
}
/*******************************************************************************
*
* Function bta_gattc_srcb_alloc
*
* Description allocate server cache control block
*
* Returns pointer to the server cache.
*
******************************************************************************/
tBTA_GATTC_SERV* bta_gattc_srcb_alloc(const RawAddress& bda) {
tBTA_GATTC_SERV *p_tcb = &bta_gattc_cb.known_server[0], *p_recycle = NULL;
bool found = false;
uint8_t i;
for (i = 0; i < BTA_GATTC_KNOWN_SR_MAX; i++, p_tcb++) {
if (!p_tcb->in_use) {
found = true;
break;
} else if (!p_tcb->connected) {
p_recycle = p_tcb;
}
}
/* if not found, try to recycle one known device */
if (!found && !p_recycle)
p_tcb = NULL;
else if (!found && p_recycle)
p_tcb = p_recycle;
if (p_tcb != NULL) {
// clear reallocating
p_tcb->gatt_database.Clear();
p_tcb->pending_discovery.Clear();
*p_tcb = tBTA_GATTC_SERV();
p_tcb->in_use = true;
p_tcb->server_bda = bda;
}
return p_tcb;
}
/*******************************************************************************
*
* Function bta_gattc_enqueue
*
* Description enqueue a client request in clcb.
*
* Returns success or failure.
*
******************************************************************************/
bool bta_gattc_enqueue(tBTA_GATTC_CLCB* p_clcb, tBTA_GATTC_DATA* p_data) {
if (p_clcb->p_q_cmd == NULL) {
p_clcb->p_q_cmd = p_data;
return true;
}
LOG(ERROR) << __func__ << ": already has a pending command";
/* skip the callback now. ----- need to send callback ? */
return false;
}
/*******************************************************************************
*
* Function bta_gattc_check_notif_registry
*
* Description check if the service notificaition has been registered.
*
* Returns
*
******************************************************************************/
bool bta_gattc_check_notif_registry(tBTA_GATTC_RCB* p_clreg,
tBTA_GATTC_SERV* p_srcb,
tBTA_GATTC_NOTIFY* p_notify) {
uint8_t i;
for (i = 0; i < BTA_GATTC_NOTIF_REG_MAX; i++) {
if (p_clreg->notif_reg[i].in_use &&
p_clreg->notif_reg[i].remote_bda == p_srcb->server_bda &&
p_clreg->notif_reg[i].handle == p_notify->handle) {
VLOG(1) << "Notification registered!";
return true;
}
}
return false;
}
/*******************************************************************************
*
* Function bta_gattc_clear_notif_registration
*
* Description Clear up the notification registration information by
* RawAddress.
* Where handle is between start_handle and end_handle, and
* start_handle and end_handle are boundaries of service
* containing characteristic.
*
* Returns None.
*
******************************************************************************/
void bta_gattc_clear_notif_registration(tBTA_GATTC_SERV* p_srcb,
uint16_t conn_id, uint16_t start_handle,
uint16_t end_handle) {
RawAddress remote_bda;
tGATT_IF gatt_if;
tBTA_GATTC_RCB* p_clrcb;
uint8_t i;
tGATT_TRANSPORT transport;
uint16_t handle;
if (GATT_GetConnectionInfor(conn_id, &gatt_if, remote_bda, &transport)) {
p_clrcb = bta_gattc_cl_get_regcb(gatt_if);
if (p_clrcb != NULL) {
for (i = 0; i < BTA_GATTC_NOTIF_REG_MAX; i++) {
if (p_clrcb->notif_reg[i].in_use &&
p_clrcb->notif_reg[i].remote_bda == remote_bda) {
/* It's enough to get service or characteristic handle, as
* clear boundaries are always around service.
*/
handle = p_clrcb->notif_reg[i].handle;
if (handle >= start_handle && handle <= end_handle)
memset(&p_clrcb->notif_reg[i], 0, sizeof(tBTA_GATTC_NOTIF_REG));
}
}
}
} else {
LOG(ERROR) << "can not clear indication/notif registration for unknown app";
}
return;
}
/*******************************************************************************
*
* Function bta_gattc_mark_bg_conn
*
* Description mark background connection status when a bg connection is
* initiated or terminated.
*
* Returns true if success; false otherwise.
*
******************************************************************************/
bool bta_gattc_mark_bg_conn(tGATT_IF client_if,
const RawAddress& remote_bda_ptr, bool add) {
tBTA_GATTC_BG_TCK* p_bg_tck = &bta_gattc_cb.bg_track[0];
uint8_t i = 0;
tBTA_GATTC_CIF_MASK* p_cif_mask;
for (i = 0; i < BTA_GATTC_KNOWN_SR_MAX; i++, p_bg_tck++) {
if (p_bg_tck->in_use && ((p_bg_tck->remote_bda == remote_bda_ptr) ||
(p_bg_tck->remote_bda.IsEmpty()))) {
p_cif_mask = &p_bg_tck->cif_mask;
if (add) /* mask on the cif bit */
*p_cif_mask |= (1 << (client_if - 1));
else {
if (client_if != 0)
*p_cif_mask &= (~(1 << (client_if - 1)));
else
*p_cif_mask = 0;
}
/* no BG connection for this device, make it available */
if (p_bg_tck->cif_mask == 0) {
memset(p_bg_tck, 0, sizeof(tBTA_GATTC_BG_TCK));
}
return true;
}
}
if (!add) {
LOG(ERROR) << __func__
<< " unable to find the bg connection mask for bd_addr="
<< remote_bda_ptr;
return false;
} else /* adding a new device mask */
{
for (i = 0, p_bg_tck = &bta_gattc_cb.bg_track[0];
i < BTA_GATTC_KNOWN_SR_MAX; i++, p_bg_tck++) {
if (!p_bg_tck->in_use) {
p_bg_tck->in_use = true;
p_bg_tck->remote_bda = remote_bda_ptr;
p_cif_mask = &p_bg_tck->cif_mask;
*p_cif_mask = (1 << (client_if - 1));
return true;
}
}
LOG(ERROR) << "no available space to mark the bg connection status";
return false;
}
}
/*******************************************************************************
*
* Function bta_gattc_check_bg_conn
*
* Description check if this is a background connection background
* connection.
*
* Returns true if success; false otherwise.
*
******************************************************************************/
bool bta_gattc_check_bg_conn(tGATT_IF client_if, const RawAddress& remote_bda,
uint8_t role) {
tBTA_GATTC_BG_TCK* p_bg_tck = &bta_gattc_cb.bg_track[0];
uint8_t i = 0;
bool is_bg_conn = false;
for (i = 0; i < BTA_GATTC_KNOWN_SR_MAX && !is_bg_conn; i++, p_bg_tck++) {
if (p_bg_tck->in_use && (p_bg_tck->remote_bda == remote_bda ||
p_bg_tck->remote_bda.IsEmpty())) {
if (((p_bg_tck->cif_mask & (1 << (client_if - 1))) != 0) &&
role == HCI_ROLE_MASTER)
is_bg_conn = true;
}
}
return is_bg_conn;
}
/*******************************************************************************
*
* Function bta_gattc_send_open_cback
*
* Description send open callback
*
* Returns
*
******************************************************************************/
void bta_gattc_send_open_cback(tBTA_GATTC_RCB* p_clreg, tGATT_STATUS status,
const RawAddress& remote_bda, uint16_t conn_id,
tBTA_TRANSPORT transport, uint16_t mtu) {
tBTA_GATTC cb_data;
if (p_clreg->p_cback) {
memset(&cb_data, 0, sizeof(tBTA_GATTC));
cb_data.open.status = status;
cb_data.open.client_if = p_clreg->client_if;
cb_data.open.conn_id = conn_id;
cb_data.open.mtu = mtu;
cb_data.open.transport = transport;
cb_data.open.remote_bda = remote_bda;
(*p_clreg->p_cback)(BTA_GATTC_OPEN_EVT, &cb_data);
}
}
/*******************************************************************************
*
* Function bta_gattc_conn_alloc
*
* Description allocate connection tracking spot
*
* Returns pointer to the clcb
*
******************************************************************************/
tBTA_GATTC_CONN* bta_gattc_conn_alloc(const RawAddress& remote_bda) {
uint8_t i_conn = 0;
tBTA_GATTC_CONN* p_conn = &bta_gattc_cb.conn_track[0];
for (i_conn = 0; i_conn < BTA_GATTC_CONN_MAX; i_conn++, p_conn++) {
if (!p_conn->in_use) {
#if (BTA_GATT_DEBUG == TRUE)
VLOG(1) << __func__ << ": found conn_track:" << +i_conn << " available";
#endif
p_conn->in_use = true;
p_conn->remote_bda = remote_bda;
return p_conn;
}
}
return NULL;
}
/*******************************************************************************
*
* Function bta_gattc_conn_find
*
* Description allocate connection tracking spot
*
* Returns pointer to the clcb
*
******************************************************************************/
tBTA_GATTC_CONN* bta_gattc_conn_find(const RawAddress& remote_bda) {
uint8_t i_conn = 0;
tBTA_GATTC_CONN* p_conn = &bta_gattc_cb.conn_track[0];
for (i_conn = 0; i_conn < BTA_GATTC_CONN_MAX; i_conn++, p_conn++) {
if (p_conn->in_use && remote_bda == p_conn->remote_bda) {
#if (BTA_GATT_DEBUG == TRUE)
VLOG(1) << __func__ << ": found conn_track:" << +i_conn << " matched";
#endif
return p_conn;
}
}
return NULL;
}
/*******************************************************************************
*
* Function bta_gattc_conn_find_alloc
*
* Description find or allocate connection tracking spot
*
* Returns pointer to the clcb
*
******************************************************************************/
tBTA_GATTC_CONN* bta_gattc_conn_find_alloc(const RawAddress& remote_bda) {
tBTA_GATTC_CONN* p_conn = bta_gattc_conn_find(remote_bda);
if (p_conn == NULL) {
p_conn = bta_gattc_conn_alloc(remote_bda);
}
return p_conn;
}
/*******************************************************************************
*
* Function bta_gattc_conn_dealloc
*
* Description de-allocate connection tracking spot
*
* Returns pointer to the clcb
*
******************************************************************************/
bool bta_gattc_conn_dealloc(const RawAddress& remote_bda) {
tBTA_GATTC_CONN* p_conn = bta_gattc_conn_find(remote_bda);
if (p_conn != NULL) {
p_conn->in_use = false;
p_conn->remote_bda = RawAddress::kEmpty;
return true;
}
return false;
}
/*******************************************************************************
*
* Function bta_gattc_find_int_conn_clcb
*
* Description try to locate a clcb when an internal connecion event
* arrives.
*
* Returns pointer to the clcb
*
******************************************************************************/
tBTA_GATTC_CLCB* bta_gattc_find_int_conn_clcb(tBTA_GATTC_DATA* p_msg) {
tBTA_GATTC_CLCB* p_clcb = NULL;
if (p_msg->int_conn.role == HCI_ROLE_SLAVE)
bta_gattc_conn_find_alloc(p_msg->int_conn.remote_bda);
/* try to locate a logic channel */
p_clcb = bta_gattc_find_clcb_by_cif(p_msg->int_conn.client_if,
p_msg->int_conn.remote_bda,
p_msg->int_conn.transport);
if (p_clcb == NULL) {
/* for a background connection or listening connection */
if (/*p_msg->int_conn.role == HCI_ROLE_SLAVE || */
bta_gattc_check_bg_conn(p_msg->int_conn.client_if,
p_msg->int_conn.remote_bda,
p_msg->int_conn.role)) {
/* allocate a new channel */
p_clcb = bta_gattc_clcb_alloc(p_msg->int_conn.client_if,
p_msg->int_conn.remote_bda,
p_msg->int_conn.transport);
}
}
return p_clcb;
}
/*******************************************************************************
*
* Function bta_gattc_find_int_disconn_clcb
*
* Description try to locate a clcb when an internal disconnect callback
* arrives.
*
* Returns pointer to the clcb
*
******************************************************************************/
tBTA_GATTC_CLCB* bta_gattc_find_int_disconn_clcb(tBTA_GATTC_DATA* p_msg) {
tBTA_GATTC_CLCB* p_clcb = NULL;
bta_gattc_conn_dealloc(p_msg->int_conn.remote_bda);
p_clcb = bta_gattc_find_clcb_by_conn_id(p_msg->int_conn.hdr.layer_specific);
if (p_clcb == NULL) {
/* connection attempt failed, send connection callback event */
p_clcb = bta_gattc_find_clcb_by_cif(p_msg->int_conn.client_if,
p_msg->int_conn.remote_bda,
p_msg->int_conn.transport);
}
if (p_clcb == NULL) {
VLOG(1) << " disconnection ID:" << +p_msg->int_conn.hdr.layer_specific
<< " not used by BTA";
}
return p_clcb;
}