/******************************************************************************
*
* Copyright (C) 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 <string.h>
#include "bt_common.h"
#include "bta_gattc_int.h"
#include "bta_sys.h"
#include "btcore/include/bdaddr.h"
#include "l2c_api.h"
#include "utl.h"
/*****************************************************************************
* Constants
****************************************************************************/
static const uint8_t base_uuid[LEN_UUID_128] = {
0xFB, 0x34, 0x9B, 0x5F, 0x80, 0x00, 0x00, 0x80,
0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
static const BD_ADDR dummy_bda = {0, 0, 0, 0, 0, 0};
/*******************************************************************************
*
* Function bta_gatt_convert_uuid16_to_uuid128
*
* Description Convert a 16 bits UUID to be an standard 128 bits one.
*
* Returns true if two uuid match; false otherwise.
*
******************************************************************************/
void bta_gatt_convert_uuid16_to_uuid128(uint8_t uuid_128[LEN_UUID_128],
uint16_t uuid_16) {
uint8_t* p = &uuid_128[LEN_UUID_128 - 4];
memcpy(uuid_128, base_uuid, LEN_UUID_128);
UINT16_TO_STREAM(p, uuid_16);
}
/*******************************************************************************
*
* Function bta_gattc_uuid_compare
*
* Description Compare two UUID to see if they are the same.
*
* Returns true if two uuid match; false otherwise.
*
******************************************************************************/
bool bta_gattc_uuid_compare(const tBT_UUID* p_src, const tBT_UUID* p_tar,
bool is_precise) {
uint8_t su[LEN_UUID_128], tu[LEN_UUID_128];
const uint8_t *ps, *pt;
/* any of the UUID is unspecified */
if (p_src == 0 || p_tar == 0) {
if (is_precise)
return false;
else
return true;
}
/* If both are 16-bit, we can do a simple compare */
if (p_src->len == 2 && p_tar->len == 2) {
return p_src->uu.uuid16 == p_tar->uu.uuid16;
}
/* One or both of the UUIDs is 128-bit */
if (p_src->len == LEN_UUID_16) {
/* convert a 16 bits UUID to 128 bits value */
bta_gatt_convert_uuid16_to_uuid128(su, p_src->uu.uuid16);
ps = su;
} else
ps = p_src->uu.uuid128;
if (p_tar->len == LEN_UUID_16) {
/* convert a 16 bits UUID to 128 bits value */
bta_gatt_convert_uuid16_to_uuid128(tu, p_tar->uu.uuid16);
pt = tu;
} else
pt = p_tar->uu.uuid128;
return (memcmp(ps, pt, LEN_UUID_128) == 0);
}
/*******************************************************************************
*
* 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,
BD_ADDR 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 && bdcmp(p_clcb->bda, remote_bda) == 0)
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(tBTA_GATTC_IF client_if,
BD_ADDR 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)
APPL_TRACE_DEBUG("bta_gattc_clcb_alloc: found clcb[%d] available",
i_clcb);
#endif
p_clcb = &bta_gattc_cb.clcb[i_clcb];
p_clcb->in_use = true;
p_clcb->status = BTA_GATT_OK;
p_clcb->transport = transport;
bdcpy(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(tBTA_GATTC_IF client_if,
BD_ADDR 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) {
tBTA_GATTC_SERV* p_srcb = NULL;
if (p_clcb) {
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;
/* clean up cache */
if (p_srcb->p_srvc_cache) {
list_free(p_srcb->p_srvc_cache);
p_srcb->p_srvc_cache = NULL;
}
}
osi_free_and_reset((void**)&p_clcb->p_q_cmd);
memset(p_clcb, 0, sizeof(tBTA_GATTC_CLCB));
} else {
APPL_TRACE_ERROR("bta_gattc_clcb_dealloc p_clcb=NULL");
}
}
/*******************************************************************************
*
* 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(BD_ADDR 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 && bdcmp(p_srcb->server_bda, bda) == 0) 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(BD_ADDR 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 (bdcmp(p_srcb->server_bda, bda) == 0) 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(BD_ADDR 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) {
if (p_tcb->p_srvc_cache != NULL) list_free(p_tcb->p_srvc_cache);
osi_free_and_reset((void**)&p_tcb->p_srvc_list);
memset(p_tcb, 0, sizeof(tBTA_GATTC_SERV));
p_tcb->in_use = true;
bdcpy(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;
}
APPL_TRACE_ERROR("%s: already has a pending command!!", __func__);
/* 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 &&
bdcmp(p_clreg->notif_reg[i].remote_bda, p_srcb->server_bda) == 0 &&
p_clreg->notif_reg[i].handle == p_notify->handle) {
APPL_TRACE_DEBUG("Notification registered!");
return true;
}
}
return false;
}
/*******************************************************************************
*
* Function bta_gattc_clear_notif_registration
*
* Description Clear up the notification registration information by
* BD_ADDR.
* 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) {
BD_ADDR remote_bda;
tBTA_GATTC_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 &&
!bdcmp(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 {
APPL_TRACE_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(tBTA_GATTC_IF client_if, BD_ADDR_PTR 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 &&
((remote_bda_ptr != NULL &&
bdcmp(p_bg_tck->remote_bda, remote_bda_ptr) == 0) ||
(remote_bda_ptr == NULL &&
bdcmp(p_bg_tck->remote_bda, dummy_bda) == 0))) {
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) {
if (remote_bda_ptr) {
bdstr_t bdstr = {0};
APPL_TRACE_ERROR(
"%s unable to find the bg connection mask for: %s", __func__,
bdaddr_to_string((bt_bdaddr_t*)remote_bda_ptr, bdstr, sizeof(bdstr)));
}
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;
if (remote_bda_ptr)
bdcpy(p_bg_tck->remote_bda, remote_bda_ptr);
else
bdcpy(p_bg_tck->remote_bda, dummy_bda);
p_cif_mask = &p_bg_tck->cif_mask;
*p_cif_mask = (1 << (client_if - 1));
return true;
}
}
APPL_TRACE_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(tBTA_GATTC_IF client_if, BD_ADDR 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 && (bdcmp(p_bg_tck->remote_bda, remote_bda) == 0 ||
bdcmp(p_bg_tck->remote_bda, dummy_bda) == 0)) {
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, tBTA_GATT_STATUS status,
BD_ADDR 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;
bdcpy(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(BD_ADDR 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)
APPL_TRACE_DEBUG("bta_gattc_conn_alloc: found conn_track[%d] available",
i_conn);
#endif
p_conn->in_use = true;
bdcpy(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(BD_ADDR 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 && bdcmp(remote_bda, p_conn->remote_bda) == 0) {
#if (BTA_GATT_DEBUG == TRUE)
APPL_TRACE_DEBUG("bta_gattc_conn_find: found conn_track[%d] matched",
i_conn);
#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(BD_ADDR 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(BD_ADDR remote_bda) {
tBTA_GATTC_CONN* p_conn = bta_gattc_conn_find(remote_bda);
if (p_conn != NULL) {
p_conn->in_use = false;
memset(p_conn->remote_bda, 0, BD_ADDR_LEN);
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) {
APPL_TRACE_DEBUG(" disconnection ID: [%d] not used by BTA",
p_msg->int_conn.hdr.layer_specific);
}
return p_clcb;
}