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android / platform / system / bt / a430f5183c9836302f19d793a13e3670b21cc489 / . / stack / gatt / gatt_main.cc
blob: 164a86ff167a7852b32edeeefb3e30eae2fe8b42 [file] [log] [blame]
/******************************************************************************
*
* Copyright 2008-2012 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 main ATT functions
*
******************************************************************************/
#include "bt_target.h"
#include "bt_common.h"
#include "bt_utils.h"
#include "btif/include/btif_storage.h"
#include "connection_manager.h"
#include "device/include/interop.h"
#include "l2c_api.h"
#include "osi/include/osi.h"
#include "stack/btm/btm_ble_int.h"
#include "stack/btm/btm_dev.h"
#include "stack/btm/btm_sec.h"
#include "stack/eatt/eatt.h"
#include "stack/gatt/gatt_int.h"
#include "stack/include/l2cap_acl_interface.h"
using base::StringPrintf;
using bluetooth::eatt::EattExtension;
/******************************************************************************/
/* L O C A L F U N C T I O N P R O T O T Y P E S */
/******************************************************************************/
static void gatt_le_connect_cback(uint16_t chan, const RawAddress& bd_addr,
bool connected, uint16_t reason,
tBT_TRANSPORT transport);
static void gatt_le_data_ind(uint16_t chan, const RawAddress& bd_addr,
BT_HDR* p_buf);
static void gatt_le_cong_cback(const RawAddress& remote_bda, bool congest);
static void gatt_l2cif_connect_ind_cback(const RawAddress& bd_addr,
uint16_t l2cap_cid, uint16_t psm,
uint8_t l2cap_id);
static void gatt_l2cif_connect_cfm_cback(uint16_t l2cap_cid, uint16_t result);
static void gatt_l2cif_config_ind_cback(uint16_t l2cap_cid,
tL2CAP_CFG_INFO* p_cfg);
static void gatt_l2cif_config_cfm_cback(uint16_t lcid, uint16_t result,
tL2CAP_CFG_INFO* p_cfg);
static void gatt_l2cif_disconnect_ind_cback(uint16_t l2cap_cid,
bool ack_needed);
static void gatt_l2cif_disconnect(uint16_t l2cap_cid);
static void gatt_l2cif_data_ind_cback(uint16_t l2cap_cid, BT_HDR* p_msg);
static void gatt_send_conn_cback(tGATT_TCB* p_tcb);
static void gatt_l2cif_congest_cback(uint16_t cid, bool congested);
static void gatt_on_l2cap_error(uint16_t lcid, uint16_t result);
static const tL2CAP_APPL_INFO dyn_info = {
gatt_l2cif_connect_ind_cback,
gatt_l2cif_connect_cfm_cback,
gatt_l2cif_config_ind_cback,
gatt_l2cif_config_cfm_cback,
gatt_l2cif_disconnect_ind_cback,
gatt_l2cif_data_ind_cback,
gatt_l2cif_congest_cback,
NULL,
gatt_on_l2cap_error,
NULL,
NULL,
NULL
};
tGATT_CB gatt_cb;
/*******************************************************************************
*
* Function gatt_init
*
* Description This function is enable the GATT profile on the device.
* It clears out the control blocks, and registers with L2CAP.
*
* Returns void
*
******************************************************************************/
void gatt_init(void) {
tL2CAP_FIXED_CHNL_REG fixed_reg;
VLOG(1) << __func__;
gatt_cb = tGATT_CB();
connection_manager::reset(true);
memset(&fixed_reg, 0, sizeof(tL2CAP_FIXED_CHNL_REG));
gatt_cb.sign_op_queue = fixed_queue_new(SIZE_MAX);
gatt_cb.srv_chg_clt_q = fixed_queue_new(SIZE_MAX);
/* First, register fixed L2CAP channel for ATT over BLE */
fixed_reg.pL2CA_FixedConn_Cb = gatt_le_connect_cback;
fixed_reg.pL2CA_FixedData_Cb = gatt_le_data_ind;
fixed_reg.pL2CA_FixedCong_Cb = gatt_le_cong_cback; /* congestion callback */
fixed_reg.default_idle_tout = 0xffff; /* 0xffff default idle timeout */
L2CA_RegisterFixedChannel(L2CAP_ATT_CID, &fixed_reg);
/* Now, register with L2CAP for ATT PSM over BR/EDR */
if (!L2CA_Register2(BT_PSM_ATT, dyn_info, false /* enable_snoop */, nullptr,
GATT_MAX_MTU_SIZE, 0, BTM_SEC_NONE)) {
LOG(ERROR) << "ATT Dynamic Registration failed";
}
gatt_cb.hdl_cfg.gatt_start_hdl = GATT_GATT_START_HANDLE;
gatt_cb.hdl_cfg.gap_start_hdl = GATT_GAP_START_HANDLE;
gatt_cb.hdl_cfg.app_start_hdl = GATT_APP_START_HANDLE;
gatt_cb.hdl_list_info = new std::list<tGATT_HDL_LIST_ELEM>();
gatt_cb.srv_list_info = new std::list<tGATT_SRV_LIST_ELEM>();
gatt_profile_db_init();
EattExtension::GetInstance()->Start();
}
/*******************************************************************************
*
* Function gatt_free
*
* Description This function frees resources used by the GATT profile.
*
* Returns void
*
******************************************************************************/
void gatt_free(void) {
int i;
VLOG(1) << __func__;
fixed_queue_free(gatt_cb.sign_op_queue, NULL);
gatt_cb.sign_op_queue = NULL;
fixed_queue_free(gatt_cb.srv_chg_clt_q, NULL);
gatt_cb.srv_chg_clt_q = NULL;
for (i = 0; i < GATT_MAX_PHY_CHANNEL; i++) {
gatt_cb.tcb[i].pending_enc_clcb = std::queue<tGATT_CLCB*>();
fixed_queue_free(gatt_cb.tcb[i].pending_ind_q, NULL);
gatt_cb.tcb[i].pending_ind_q = NULL;
alarm_free(gatt_cb.tcb[i].conf_timer);
gatt_cb.tcb[i].conf_timer = NULL;
alarm_free(gatt_cb.tcb[i].ind_ack_timer);
gatt_cb.tcb[i].ind_ack_timer = NULL;
fixed_queue_free(gatt_cb.tcb[i].sr_cmd.multi_rsp_q, NULL);
gatt_cb.tcb[i].sr_cmd.multi_rsp_q = NULL;
if (gatt_cb.tcb[i].eatt)
EattExtension::GetInstance()->FreeGattResources(gatt_cb.tcb[i].peer_bda);
}
gatt_cb.hdl_list_info->clear();
delete gatt_cb.hdl_list_info;
gatt_cb.hdl_list_info = nullptr;
gatt_cb.srv_list_info->clear();
delete gatt_cb.srv_list_info;
gatt_cb.srv_list_info = nullptr;
EattExtension::GetInstance()->Stop();
}
void gatt_find_in_device_record(const RawAddress& bd_addr,
tBLE_BD_ADDR* address_with_type) {
const tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bd_addr);
if (p_dev_rec == nullptr) {
return;
}
if (p_dev_rec->device_type & BT_DEVICE_TYPE_BLE) {
if (p_dev_rec->ble.identity_address_with_type.bda.IsEmpty()) {
*address_with_type = {.type = p_dev_rec->ble.ble_addr_type,
.bda = bd_addr};
return;
}
*address_with_type = p_dev_rec->ble.identity_address_with_type;
return;
}
*address_with_type = {.type = BLE_ADDR_PUBLIC, .bda = bd_addr};
return;
}
/*******************************************************************************
*
* Function gatt_connect
*
* Description This function is called to initiate a connection to a peer
* device.
*
* Parameter rem_bda: remote device address to connect to.
*
* Returns true if connection is started, otherwise return false.
*
******************************************************************************/
bool gatt_connect(const RawAddress& rem_bda, tGATT_TCB* p_tcb,
tBT_TRANSPORT transport, uint8_t initiating_phys,
tGATT_IF gatt_if) {
if (gatt_get_ch_state(p_tcb) != GATT_CH_OPEN)
gatt_set_ch_state(p_tcb, GATT_CH_CONN);
if (transport != BT_TRANSPORT_LE) {
p_tcb->att_lcid = L2CA_ConnectReq2(BT_PSM_ATT, rem_bda, BTM_SEC_NONE);
return p_tcb->att_lcid != 0;
}
// Already connected, mark the link as used
if (gatt_get_ch_state(p_tcb) == GATT_CH_OPEN) {
gatt_update_app_use_link_flag(gatt_if, p_tcb, true, true);
return true;
}
p_tcb->att_lcid = L2CAP_ATT_CID;
return acl_create_le_connection_with_id(gatt_if, rem_bda);
}
/*******************************************************************************
*
* Function gatt_disconnect
*
* Description This function is called to disconnect to an ATT device.
*
* Parameter p_tcb: pointer to the TCB to disconnect.
*
* Returns true: if connection found and to be disconnected; otherwise
* return false.
*
******************************************************************************/
bool gatt_disconnect(tGATT_TCB* p_tcb) {
VLOG(1) << __func__;
if (!p_tcb) return false;
tGATT_CH_STATE ch_state = gatt_get_ch_state(p_tcb);
if (ch_state == GATT_CH_CLOSING) {
VLOG(1) << __func__ << " already in closing state";
return true;
}
if (p_tcb->att_lcid == L2CAP_ATT_CID) {
if (ch_state == GATT_CH_OPEN) {
L2CA_RemoveFixedChnl(L2CAP_ATT_CID, p_tcb->peer_bda);
gatt_set_ch_state(p_tcb, GATT_CH_CLOSING);
} else {
connection_manager::direct_connect_remove(CONN_MGR_ID_L2CAP,
p_tcb->peer_bda);
gatt_cleanup_upon_disc(p_tcb->peer_bda, GATT_CONN_TERMINATE_LOCAL_HOST,
p_tcb->transport);
}
} else {
if ((ch_state == GATT_CH_OPEN) || (ch_state == GATT_CH_CFG)) {
gatt_l2cif_disconnect(p_tcb->att_lcid);
} else {
VLOG(1) << __func__ << " gatt_disconnect channel not opened";
}
}
return true;
}
/*******************************************************************************
*
* Function gatt_update_app_hold_link_status
*
* Description Update the application use link status
*
* Returns true if any modifications are made or
* when it already exists, false otherwise.
*
******************************************************************************/
bool gatt_update_app_hold_link_status(tGATT_IF gatt_if, tGATT_TCB* p_tcb,
bool is_add) {
auto& holders = p_tcb->app_hold_link;
VLOG(1) << __func__;
if (is_add) {
auto ret = holders.insert(gatt_if);
if (ret.second) {
VLOG(1) << "added gatt_if=" << +gatt_if;
} else {
VLOG(1) << "attempt to add already existing gatt_if=" << +gatt_if;
}
return true;
}
//! is_add
if (!holders.erase(gatt_if)) {
VLOG(1) << "attempt to remove nonexisting gatt_if=" << +gatt_if;
return false;
}
VLOG(1) << "removed gatt_if=" << +gatt_if;
return true;
}
/*******************************************************************************
*
* Function gatt_update_app_use_link_flag
*
* Description Update the application use link flag and optional to check
* the acl link if the link is up then set the idle time out
* accordingly
*
* Returns void.
*
******************************************************************************/
void gatt_update_app_use_link_flag(tGATT_IF gatt_if, tGATT_TCB* p_tcb,
bool is_add, bool check_acl_link) {
VLOG(1) << StringPrintf("%s: is_add=%d chk_link=%d", __func__, is_add,
check_acl_link);
if (!p_tcb) return;
// If we make no modification, i.e. kill app that was never connected to a
// device, skip updating the device state.
if (!gatt_update_app_hold_link_status(gatt_if, p_tcb, is_add)) return;
if (!check_acl_link) {
return;
}
bool is_valid_handle =
(BTM_GetHCIConnHandle(p_tcb->peer_bda, p_tcb->transport) !=
GATT_INVALID_ACL_HANDLE);
if (is_add) {
if (p_tcb->att_lcid == L2CAP_ATT_CID && is_valid_handle) {
VLOG(1) << "disable link idle timer";
/* acl link is connected disable the idle timeout */
GATT_SetIdleTimeout(p_tcb->peer_bda, GATT_LINK_NO_IDLE_TIMEOUT,
p_tcb->transport);
}
} else {
if (p_tcb->app_hold_link.empty()) {
// acl link is connected but no application needs to use the link
if (p_tcb->att_lcid == L2CAP_ATT_CID && is_valid_handle) {
/* Drop EATT before closing ATT */
EattExtension::GetInstance()->Disconnect(p_tcb->peer_bda);
/* for fixed channel, set the timeout value to
GATT_LINK_IDLE_TIMEOUT_WHEN_NO_APP seconds */
VLOG(1) << " start link idle timer = "
<< GATT_LINK_IDLE_TIMEOUT_WHEN_NO_APP << " sec";
GATT_SetIdleTimeout(p_tcb->peer_bda, GATT_LINK_IDLE_TIMEOUT_WHEN_NO_APP,
p_tcb->transport);
} else
// disconnect the dynamic channel
gatt_disconnect(p_tcb);
}
}
}
/** GATT connection initiation */
bool gatt_act_connect(tGATT_REG* p_reg, const RawAddress& bd_addr,
tBT_TRANSPORT transport, int8_t initiating_phys) {
tGATT_TCB* p_tcb = gatt_find_tcb_by_addr(bd_addr, transport);
if (p_tcb != NULL) {
/* before link down, another app try to open a GATT connection */
uint8_t st = gatt_get_ch_state(p_tcb);
if (st == GATT_CH_OPEN && p_tcb->app_hold_link.empty() &&
transport == BT_TRANSPORT_LE) {
if (!gatt_connect(bd_addr, p_tcb, transport, initiating_phys,
p_reg->gatt_if))
return false;
} else if (st == GATT_CH_CLOSING) {
LOG(INFO) << "Must finish disconnection before new connection";
/* need to complete the closing first */
return false;
}
return true;
}
p_tcb = gatt_allocate_tcb_by_bdaddr(bd_addr, transport);
if (!p_tcb) {
LOG(ERROR) << "Max TCB for gatt_if [ " << +p_reg->gatt_if << "] reached.";
return false;
}
if (!gatt_connect(bd_addr, p_tcb, transport, initiating_phys,
p_reg->gatt_if)) {
LOG(ERROR) << "gatt_connect failed";
fixed_queue_free(p_tcb->pending_ind_q, NULL);
*p_tcb = tGATT_TCB();
return false;
}
return true;
}
namespace connection_manager {
void on_connection_timed_out(uint8_t app_id, const RawAddress& address) {
gatt_le_connect_cback(L2CAP_ATT_CID, address, false, 0xff, BT_TRANSPORT_LE);
}
} // namespace connection_manager
/** This callback function is called by L2CAP to indicate that the ATT fixed
* channel for LE is connected (conn = true)/disconnected (conn = false).
*/
static void gatt_le_connect_cback(uint16_t chan, const RawAddress& bd_addr,
bool connected, uint16_t reason,
tBT_TRANSPORT transport) {
tGATT_TCB* p_tcb = gatt_find_tcb_by_addr(bd_addr, transport);
bool check_srv_chg = false;
tGATTS_SRV_CHG* p_srv_chg_clt = NULL;
if (transport == BT_TRANSPORT_BR_EDR) {
LOG_WARN("Ignoring fixed channel connect/disconnect on br_edr for GATT");
return;
}
VLOG(1) << "GATT ATT protocol channel with BDA: " << bd_addr << " is "
<< ((connected) ? "connected" : "disconnected");
p_srv_chg_clt = gatt_is_bda_in_the_srv_chg_clt_list(bd_addr);
if (p_srv_chg_clt != NULL) {
check_srv_chg = true;
} else {
if (btm_sec_is_a_bonded_dev(bd_addr))
gatt_add_a_bonded_dev_for_srv_chg(bd_addr);
}
if (!connected) {
gatt_cleanup_upon_disc(bd_addr, static_cast<tGATT_DISCONN_REASON>(reason),
transport);
return;
}
/* do we have a channel initiating a connection? */
if (p_tcb) {
/* we are initiating connection */
if (gatt_get_ch_state(p_tcb) == GATT_CH_CONN) {
/* send callback */
gatt_set_ch_state(p_tcb, GATT_CH_OPEN);
p_tcb->payload_size = GATT_DEF_BLE_MTU_SIZE;
gatt_send_conn_cback(p_tcb);
}
if (check_srv_chg) gatt_chk_srv_chg(p_srv_chg_clt);
}
/* this is incoming connection or background connection callback */
else {
p_tcb = gatt_allocate_tcb_by_bdaddr(bd_addr, BT_TRANSPORT_LE);
if (!p_tcb) {
LOG(ERROR) << "CCB max out, no rsources";
return;
}
p_tcb->att_lcid = L2CAP_ATT_CID;
gatt_set_ch_state(p_tcb, GATT_CH_OPEN);
p_tcb->payload_size = GATT_DEF_BLE_MTU_SIZE;
gatt_send_conn_cback(p_tcb);
if (check_srv_chg) {
gatt_chk_srv_chg(p_srv_chg_clt);
}
}
EattExtension::GetInstance()->Connect(bd_addr);
}
/** This function is called to process the congestion callback from lcb */
static void gatt_channel_congestion(tGATT_TCB* p_tcb, bool congested) {
uint8_t i = 0;
tGATT_REG* p_reg = NULL;
uint16_t conn_id;
/* if uncongested, check to see if there is any more pending data */
if (p_tcb != NULL && !congested) {
gatt_cl_send_next_cmd_inq(*p_tcb);
}
/* notifying all applications for the connection up event */
for (i = 0, p_reg = gatt_cb.cl_rcb; i < GATT_MAX_APPS; i++, p_reg++) {
if (p_reg->in_use) {
if (p_reg->app_cb.p_congestion_cb) {
conn_id = GATT_CREATE_CONN_ID(p_tcb->tcb_idx, p_reg->gatt_if);
(*p_reg->app_cb.p_congestion_cb)(conn_id, congested);
}
}
}
}
void gatt_notify_phy_updated(tGATT_STATUS status, uint16_t handle,
uint8_t tx_phy, uint8_t rx_phy) {
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev_by_handle(handle);
if (!p_dev_rec) {
LOG_WARN("No Device Found!");
return;
}
tGATT_TCB* p_tcb =
gatt_find_tcb_by_addr(p_dev_rec->ble.pseudo_addr, BT_TRANSPORT_LE);
if (!p_tcb) return;
for (int i = 0; i < GATT_MAX_APPS; i++) {
tGATT_REG* p_reg = &gatt_cb.cl_rcb[i];
if (p_reg->in_use && p_reg->app_cb.p_phy_update_cb) {
uint16_t conn_id = GATT_CREATE_CONN_ID(p_tcb->tcb_idx, p_reg->gatt_if);
(*p_reg->app_cb.p_phy_update_cb)(p_reg->gatt_if, conn_id, tx_phy, rx_phy,
status);
}
}
}
void gatt_notify_conn_update(const RawAddress& remote, uint16_t interval,
uint16_t latency, uint16_t timeout,
tHCI_STATUS status) {
tGATT_TCB* p_tcb = gatt_find_tcb_by_addr(remote, BT_TRANSPORT_LE);
if (!p_tcb) return;
for (int i = 0; i < GATT_MAX_APPS; i++) {
tGATT_REG* p_reg = &gatt_cb.cl_rcb[i];
if (p_reg->in_use && p_reg->app_cb.p_conn_update_cb) {
uint16_t conn_id = GATT_CREATE_CONN_ID(p_tcb->tcb_idx, p_reg->gatt_if);
(*p_reg->app_cb.p_conn_update_cb)(p_reg->gatt_if, conn_id, interval,
latency, timeout,
static_cast<tGATT_STATUS>(status));
}
}
}
/** This function is called when GATT fixed channel is congested or uncongested
*/
static void gatt_le_cong_cback(const RawAddress& remote_bda, bool congested) {
tGATT_TCB* p_tcb = gatt_find_tcb_by_addr(remote_bda, BT_TRANSPORT_LE);
if (!p_tcb) return;
/* if uncongested, check to see if there is any more pending data */
gatt_channel_congestion(p_tcb, congested);
}
/*******************************************************************************
*
* Function gatt_le_data_ind
*
* Description This function is called when data is received from L2CAP.
* if we are the originator of the connection, we are the ATT
* client, and the received message is queued up for the
* client.
*
* If we are the destination of the connection, we are the ATT
* server, so the message is passed to the server processing
* function.
*
* Returns void
*
******************************************************************************/
static void gatt_le_data_ind(uint16_t chan, const RawAddress& bd_addr,
BT_HDR* p_buf) {
/* Find CCB based on bd addr */
tGATT_TCB* p_tcb = gatt_find_tcb_by_addr(bd_addr, BT_TRANSPORT_LE);
if (p_tcb) {
if (gatt_get_ch_state(p_tcb) < GATT_CH_OPEN) {
LOG(WARNING) << "ATT - Ignored L2CAP data while in state: "
<< +gatt_get_ch_state(p_tcb);
} else
gatt_data_process(*p_tcb, L2CAP_ATT_CID, p_buf);
}
osi_free(p_buf);
}
/*******************************************************************************
*
* Function gatt_l2cif_connect_ind
*
* Description This function handles an inbound connection indication
* from L2CAP. This is the case where we are acting as a
* server.
*
* Returns void
*
******************************************************************************/
static void gatt_l2cif_connect_ind_cback(const RawAddress& bd_addr,
uint16_t lcid,
UNUSED_ATTR uint16_t psm, uint8_t id) {
uint8_t result = L2CAP_CONN_OK;
LOG(INFO) << "Connection indication cid = " << +lcid;
/* new connection ? */
tGATT_TCB* p_tcb = gatt_find_tcb_by_addr(bd_addr, BT_TRANSPORT_BR_EDR);
if (p_tcb == NULL) {
/* allocate tcb */
p_tcb = gatt_allocate_tcb_by_bdaddr(bd_addr, BT_TRANSPORT_BR_EDR);
if (p_tcb == NULL) {
/* no tcb available, reject L2CAP connection */
result = L2CAP_CONN_NO_RESOURCES;
} else
p_tcb->att_lcid = lcid;
} else /* existing connection , reject it */
{
result = L2CAP_CONN_NO_RESOURCES;
}
/* If we reject the connection, send DisconnectReq */
if (result != L2CAP_CONN_OK) {
L2CA_DisconnectReq(lcid);
return;
}
/* transition to configuration state */
gatt_set_ch_state(p_tcb, GATT_CH_CFG);
}
static void gatt_on_l2cap_error(uint16_t lcid, uint16_t result) {
tGATT_TCB* p_tcb = gatt_find_tcb_by_cid(lcid);
if (p_tcb == nullptr) return;
if (gatt_get_ch_state(p_tcb) == GATT_CH_CONN) {
gatt_cleanup_upon_disc(p_tcb->peer_bda, GATT_CONN_L2C_FAILURE,
BT_TRANSPORT_BR_EDR);
} else {
gatt_l2cif_disconnect(lcid);
}
}
/** This is the L2CAP connect confirm callback function */
static void gatt_l2cif_connect_cfm_cback(uint16_t lcid, uint16_t result) {
tGATT_TCB* p_tcb;
/* look up clcb for this channel */
p_tcb = gatt_find_tcb_by_cid(lcid);
if (!p_tcb) return;
VLOG(1) << __func__
<< StringPrintf(" result: %d ch_state: %d, lcid:0x%x", result,
gatt_get_ch_state(p_tcb), p_tcb->att_lcid);
if (gatt_get_ch_state(p_tcb) == GATT_CH_CONN && result == L2CAP_CONN_OK) {
gatt_set_ch_state(p_tcb, GATT_CH_CFG);
} else {
gatt_on_l2cap_error(lcid, result);
}
}
/** This is the L2CAP config confirm callback function */
void gatt_l2cif_config_cfm_cback(uint16_t lcid, uint16_t initiator,
tL2CAP_CFG_INFO* p_cfg) {
gatt_l2cif_config_ind_cback(lcid, p_cfg);
/* look up clcb for this channel */
tGATT_TCB* p_tcb = gatt_find_tcb_by_cid(lcid);
if (!p_tcb) return;
/* if in incorrect state */
if (gatt_get_ch_state(p_tcb) != GATT_CH_CFG) return;
gatt_set_ch_state(p_tcb, GATT_CH_OPEN);
tGATTS_SRV_CHG* p_srv_chg_clt =
gatt_is_bda_in_the_srv_chg_clt_list(p_tcb->peer_bda);
if (p_srv_chg_clt != NULL) {
gatt_chk_srv_chg(p_srv_chg_clt);
} else {
if (btm_sec_is_a_bonded_dev(p_tcb->peer_bda))
gatt_add_a_bonded_dev_for_srv_chg(p_tcb->peer_bda);
}
/* send callback */
gatt_send_conn_cback(p_tcb);
}
/** This is the L2CAP config indication callback function */
void gatt_l2cif_config_ind_cback(uint16_t lcid, tL2CAP_CFG_INFO* p_cfg) {
/* look up clcb for this channel */
tGATT_TCB* p_tcb = gatt_find_tcb_by_cid(lcid);
if (!p_tcb) return;
/* GATT uses the smaller of our MTU and peer's MTU */
if (p_cfg->mtu_present && p_cfg->mtu < L2CAP_DEFAULT_MTU)
p_tcb->payload_size = p_cfg->mtu;
else
p_tcb->payload_size = L2CAP_DEFAULT_MTU;
}
/** This is the L2CAP disconnect indication callback function */
void gatt_l2cif_disconnect_ind_cback(uint16_t lcid, bool ack_needed) {
/* look up clcb for this channel */
tGATT_TCB* p_tcb = gatt_find_tcb_by_cid(lcid);
if (!p_tcb) return;
if (gatt_is_bda_in_the_srv_chg_clt_list(p_tcb->peer_bda) == NULL) {
if (btm_sec_is_a_bonded_dev(p_tcb->peer_bda))
gatt_add_a_bonded_dev_for_srv_chg(p_tcb->peer_bda);
}
/* send disconnect callback */
gatt_cleanup_upon_disc(p_tcb->peer_bda, GATT_CONN_TERMINATE_PEER_USER,
BT_TRANSPORT_BR_EDR);
}
static void gatt_l2cif_disconnect(uint16_t lcid) {
L2CA_DisconnectReq(lcid);
/* look up clcb for this channel */
tGATT_TCB* p_tcb = gatt_find_tcb_by_cid(lcid);
if (!p_tcb) return;
/* If the device is not in the service changed client list, add it... */
if (gatt_is_bda_in_the_srv_chg_clt_list(p_tcb->peer_bda) == NULL) {
if (btm_sec_is_a_bonded_dev(p_tcb->peer_bda))
gatt_add_a_bonded_dev_for_srv_chg(p_tcb->peer_bda);
}
gatt_cleanup_upon_disc(p_tcb->peer_bda, GATT_CONN_TERMINATE_LOCAL_HOST,
BT_TRANSPORT_BR_EDR);
}
/** This is the L2CAP data indication callback function */
static void gatt_l2cif_data_ind_cback(uint16_t lcid, BT_HDR* p_buf) {
/* look up clcb for this channel */
tGATT_TCB* p_tcb = gatt_find_tcb_by_cid(lcid);
if (p_tcb && gatt_get_ch_state(p_tcb) == GATT_CH_OPEN) {
/* process the data */
gatt_data_process(*p_tcb, lcid, p_buf);
}
osi_free(p_buf);
}
/** L2CAP congestion callback */
static void gatt_l2cif_congest_cback(uint16_t lcid, bool congested) {
tGATT_TCB* p_tcb = gatt_find_tcb_by_cid(lcid);
if (p_tcb != NULL) {
gatt_channel_congestion(p_tcb, congested);
}
}
/** Callback used to notify layer above about a connection */
static void gatt_send_conn_cback(tGATT_TCB* p_tcb) {
uint8_t i;
tGATT_REG* p_reg;
uint16_t conn_id;
std::set<tGATT_IF> apps =
connection_manager::get_apps_connecting_to(p_tcb->peer_bda);
/* notifying all applications for the connection up event */
for (i = 0, p_reg = gatt_cb.cl_rcb; i < GATT_MAX_APPS; i++, p_reg++) {
if (!p_reg->in_use) continue;
if (apps.find(p_reg->gatt_if) != apps.end())
gatt_update_app_use_link_flag(p_reg->gatt_if, p_tcb, true, true);
if (p_reg->app_cb.p_conn_cb) {
conn_id = GATT_CREATE_CONN_ID(p_tcb->tcb_idx, p_reg->gatt_if);
(*p_reg->app_cb.p_conn_cb)(p_reg->gatt_if, p_tcb->peer_bda, conn_id,
kGattConnected, GATT_CONN_OK,
p_tcb->transport);
}
}
/* Remove the direct connection */
connection_manager::on_connection_complete(p_tcb->peer_bda);
if (!p_tcb->app_hold_link.empty() && p_tcb->att_lcid == L2CAP_ATT_CID) {
/* disable idle timeout if one or more clients are holding the link disable
* the idle timer */
GATT_SetIdleTimeout(p_tcb->peer_bda, GATT_LINK_NO_IDLE_TIMEOUT,
p_tcb->transport);
}
}
/*******************************************************************************
*
* Function gatt_le_data_ind
*
* Description This function is called when data is received from L2CAP.
* if we are the originator of the connection, we are the ATT
* client, and the received message is queued up for the
* client.
*
* If we are the destination of the connection, we are the ATT
* server, so the message is passed to the server processing
* function.
*
* Returns void
*
******************************************************************************/
void gatt_data_process(tGATT_TCB& tcb, uint16_t cid, BT_HDR* p_buf) {
uint8_t* p = (uint8_t*)(p_buf + 1) + p_buf->offset;
uint8_t op_code, pseudo_op_code;
if (p_buf->len <= 0) {
LOG(ERROR) << "invalid data length, ignore";
return;
}
uint16_t msg_len = p_buf->len - 1;
STREAM_TO_UINT8(op_code, p);
/* remove the two MSBs associated with sign write and write cmd */
pseudo_op_code = op_code & (~GATT_WRITE_CMD_MASK);
if (pseudo_op_code >= GATT_OP_CODE_MAX) {
/* Note: PTS: GATT/SR/UNS/BI-01-C mandates error on unsupported ATT request.
*/
LOG(ERROR) << __func__
<< ": ATT - Rcvd L2CAP data, unknown cmd: " << loghex(op_code);
gatt_send_error_rsp(tcb, cid, GATT_REQ_NOT_SUPPORTED, op_code, 0, false);
return;
}
if (op_code == GATT_SIGN_CMD_WRITE) {
gatt_verify_signature(tcb, cid, p_buf);
} else {
/* message from client */
if ((op_code % 2) == 0)
gatt_server_handle_client_req(tcb, cid, op_code, msg_len, p);
else
gatt_client_handle_server_rsp(tcb, cid, op_code, msg_len, p);
}
}
/** Add a bonded dev to the service changed client list */
void gatt_add_a_bonded_dev_for_srv_chg(const RawAddress& bda) {
tGATTS_SRV_CHG_REQ req;
tGATTS_SRV_CHG srv_chg_clt;
srv_chg_clt.bda = bda;
srv_chg_clt.srv_changed = false;
if (!gatt_add_srv_chg_clt(&srv_chg_clt)) return;
req.srv_chg.bda = bda;
req.srv_chg.srv_changed = false;
if (gatt_cb.cb_info.p_srv_chg_callback)
(*gatt_cb.cb_info.p_srv_chg_callback)(GATTS_SRV_CHG_CMD_ADD_CLIENT, &req,
NULL);
}
/** This function is called to send a service chnaged indication to the
* specified bd address */
void gatt_send_srv_chg_ind(const RawAddress& peer_bda) {
VLOG(1) << __func__;
if (!gatt_cb.handle_of_h_r) return;
uint16_t conn_id = gatt_profile_find_conn_id_by_bd_addr(peer_bda);
if (conn_id == GATT_INVALID_CONN_ID) {
LOG(ERROR) << "Unable to find conn_id for " << peer_bda;
return;
}
uint8_t handle_range[GATT_SIZE_OF_SRV_CHG_HNDL_RANGE];
uint8_t* p = handle_range;
UINT16_TO_STREAM(p, 1);
UINT16_TO_STREAM(p, 0xFFFF);
GATTS_HandleValueIndication(conn_id, gatt_cb.handle_of_h_r,
GATT_SIZE_OF_SRV_CHG_HNDL_RANGE, handle_range);
}
/** Check sending service chnaged Indication is required or not if required then
* send the Indication */
void gatt_chk_srv_chg(tGATTS_SRV_CHG* p_srv_chg_clt) {
VLOG(1) << __func__ << " srv_changed=" << +p_srv_chg_clt->srv_changed;
if (p_srv_chg_clt->srv_changed) {
gatt_send_srv_chg_ind(p_srv_chg_clt->bda);
}
}
/** This function is used to initialize the service changed attribute value */
void gatt_init_srv_chg(void) {
tGATTS_SRV_CHG_REQ req;
tGATTS_SRV_CHG_RSP rsp;
tGATTS_SRV_CHG srv_chg_clt;
VLOG(1) << __func__;
if (!gatt_cb.cb_info.p_srv_chg_callback) {
VLOG(1) << __func__ << " callback not registered yet";
return;
}
bool status = (*gatt_cb.cb_info.p_srv_chg_callback)(
GATTS_SRV_CHG_CMD_READ_NUM_CLENTS, NULL, &rsp);
if (!(status && rsp.num_clients)) return;
VLOG(1) << "num_srv_chg_clt_clients=" << +rsp.num_clients;
uint8_t num_clients = rsp.num_clients;
uint8_t i = 1; /* use one based index */
while ((i <= num_clients) && status) {
req.client_read_index = i;
status = (*gatt_cb.cb_info.p_srv_chg_callback)(GATTS_SRV_CHG_CMD_READ_CLENT,
&req, &rsp);
if (status) {
memcpy(&srv_chg_clt, &rsp.srv_chg, sizeof(tGATTS_SRV_CHG));
if (gatt_add_srv_chg_clt(&srv_chg_clt) == NULL) {
LOG(ERROR) << "Unable to add a service change client";
status = false;
}
}
i++;
}
}
/**This function is process the service changed request */
void gatt_proc_srv_chg(void) {
RawAddress bda;
tBT_TRANSPORT transport;
uint8_t found_idx;
VLOG(1) << __func__;
if (!gatt_cb.cb_info.p_srv_chg_callback || !gatt_cb.handle_of_h_r) return;
gatt_set_srv_chg();
uint8_t start_idx = 0;
while (gatt_find_the_connected_bda(start_idx, bda, &found_idx, &transport)) {
tGATT_TCB* p_tcb = &gatt_cb.tcb[found_idx];
bool send_indication = true;
if (gatt_is_srv_chg_ind_pending(p_tcb)) {
send_indication = false;
VLOG(1) << "discard srv chg - already has one in the queue";
}
// Some LE GATT clients don't respond to service changed indications.
char remote_name[BTM_MAX_REM_BD_NAME_LEN] = "";
if (send_indication &&
btif_storage_get_stored_remote_name(bda, remote_name)) {
if (interop_match_name(INTEROP_GATTC_NO_SERVICE_CHANGED_IND,
remote_name)) {
VLOG(1) << "discard srv chg - interop matched " << remote_name;
send_indication = false;
}
}
if (send_indication) gatt_send_srv_chg_ind(bda);
start_idx = ++found_idx;
}
}
/** This function set the ch_state in tcb */
void gatt_set_ch_state(tGATT_TCB* p_tcb, tGATT_CH_STATE ch_state) {
if (!p_tcb) return;
VLOG(1) << __func__ << ": old=" << +p_tcb->ch_state
<< " new=" << loghex(static_cast<uint8_t>(ch_state));
p_tcb->ch_state = ch_state;
}
/** This function get the ch_state in tcb */
tGATT_CH_STATE gatt_get_ch_state(tGATT_TCB* p_tcb) {
if (!p_tcb) return GATT_CH_CLOSE;
VLOG(1) << "gatt_get_ch_state: ch_state=" << +p_tcb->ch_state;
return p_tcb->ch_state;
}