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esp-idf/components/bt/host/bluedroid/stack/gatt/gatt_main.c

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/******************************************************************************
*
* Copyright (C) 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 "common/bt_target.h"
#if BLE_INCLUDED == TRUE
#include "gatt_int.h"
#include "stack/l2c_api.h"
#include "btm_int.h"
#include "btm_ble_int.h"
#include "osi/allocator.h"
/* Configuration flags. */
#define GATT_L2C_CFG_IND_DONE (1<<0)
#define GATT_L2C_CFG_CFM_DONE (1<<1)
/* minimum GATT MTU size over BR/EDR link
*/
#define GATT_MIN_BR_MTU_SIZE 48
/********************************************************************************/
/* 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 chan, BD_ADDR bd_addr, BOOLEAN connected,
UINT16 reason, tBT_TRANSPORT transport);
static void gatt_le_data_ind (UINT16 chan, BD_ADDR bd_addr, BT_HDR *p_buf);
static void gatt_le_cong_cback(BD_ADDR remote_bda, BOOLEAN congest);
#if (CLASSIC_BT_GATT_INCLUDED == TRUE)
static void gatt_l2cif_connect_ind_cback (BD_ADDR bd_addr, UINT16 l2cap_cid,
UINT16 psm, UINT8 l2cap_id);
static void gatt_l2cif_connect_cfm_cback (UINT16 l2cap_cid, UINT16 result);
static void gatt_l2cif_config_ind_cback (UINT16 l2cap_cid, tL2CAP_CFG_INFO *p_cfg);
static void gatt_l2cif_config_cfm_cback (UINT16 l2cap_cid, tL2CAP_CFG_INFO *p_cfg);
static void gatt_l2cif_disconnect_ind_cback (UINT16 l2cap_cid, BOOLEAN ack_needed);
static void gatt_l2cif_disconnect_cfm_cback (UINT16 l2cap_cid, UINT16 result);
static void gatt_l2cif_data_ind_cback (UINT16 l2cap_cid, BT_HDR *p_msg);
#endif ///CLASSIC_BT_GATT_INCLUDED == TRUE
static void gatt_send_conn_cback (tGATT_TCB *p_tcb);
#if (CLASSIC_BT_GATT_INCLUDED == TRUE)
static void gatt_l2cif_congest_cback (UINT16 cid, BOOLEAN congested);
static const tL2CAP_APPL_INFO dyn_info = {
gatt_l2cif_connect_ind_cback,
gatt_l2cif_connect_cfm_cback,
NULL,
gatt_l2cif_config_ind_cback,
gatt_l2cif_config_cfm_cback,
gatt_l2cif_disconnect_ind_cback,
gatt_l2cif_disconnect_cfm_cback,
NULL,
gatt_l2cif_data_ind_cback,
gatt_l2cif_congest_cback,
NULL
} ;
#endif ///CLASSIC_BT_GATT_INCLUDED == TRUE
#if GATT_DYNAMIC_MEMORY == FALSE
tGATT_CB gatt_cb;
#else
tGATT_CB *gatt_cb_ptr;
#endif
tGATT_DEFAULT gatt_default;
/*******************************************************************************
**
** 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;
#if GATT_DYNAMIC_MEMORY
gatt_cb_ptr = (tGATT_CB *)osi_malloc(sizeof(tGATT_CB));
#endif /* #if GATT_DYNAMIC_MEMORY */
memset (&gatt_cb, 0, sizeof(tGATT_CB));
memset (&fixed_reg, 0, sizeof(tL2CAP_FIXED_CHNL_REG));
gatt_cb.p_clcb_list = list_new(osi_free_func);
gatt_cb.p_tcb_list = list_new(osi_free_func);
#if defined(GATT_INITIAL_TRACE_LEVEL)
gatt_cb.trace_level = GATT_INITIAL_TRACE_LEVEL;
#else
gatt_cb.trace_level = BT_TRACE_LEVEL_NONE; /* No traces */
#endif
gatt_cb.def_mtu_size = GATT_DEF_BLE_MTU_SIZE;
gatt_cb.sign_op_queue = fixed_queue_new(QUEUE_SIZE_MAX);
gatt_cb.srv_chg_clt_q = fixed_queue_new(QUEUE_SIZE_MAX);
gatt_cb.pending_new_srv_start_q = fixed_queue_new(QUEUE_SIZE_MAX);
/* First, register fixed L2CAP channel for ATT over BLE */
fixed_reg.fixed_chnl_opts.mode = L2CAP_FCR_BASIC_MODE;
fixed_reg.fixed_chnl_opts.max_transmit = 0xFF;
fixed_reg.fixed_chnl_opts.rtrans_tout = 2000;
fixed_reg.fixed_chnl_opts.mon_tout = 12000;
fixed_reg.fixed_chnl_opts.mps = 670;
fixed_reg.fixed_chnl_opts.tx_win_sz = 1;
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);
#if (CLASSIC_BT_GATT_INCLUDED == TRUE)
/* Now, register with L2CAP for ATT PSM over BR/EDR */
if (!L2CA_Register (BT_PSM_ATT, (tL2CAP_APPL_INFO *) &dyn_info)) {
GATT_TRACE_ERROR ("ATT Dynamic Registration failed");
}
#endif ///CLASSIC_BT_GATT_INCLUDED == TRUE
BTM_SetSecurityLevel(TRUE, "", BTM_SEC_SERVICE_ATT, BTM_SEC_NONE, BT_PSM_ATT, 0, 0);
BTM_SetSecurityLevel(FALSE, "", BTM_SEC_SERVICE_ATT, BTM_SEC_NONE, BT_PSM_ATT, 0, 0);
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;
#if (GATTS_INCLUDED == TRUE)
gatt_profile_db_init();
#endif ///GATTS_INCLUDED == TRUE
//init local MTU size
gatt_default.local_mtu = GATT_MAX_MTU_SIZE;
}
/*******************************************************************************
**
** Function gatt_free
**
** Description This function frees resources used by the GATT profile.
**
** Returns void
**
*******************************************************************************/
#if (GATT_INCLUDED == TRUE)
void gatt_free(void)
{
GATT_TRACE_DEBUG("gatt_free()");
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;
fixed_queue_free(gatt_cb.pending_new_srv_start_q, NULL);
gatt_cb.pending_new_srv_start_q = NULL;
list_node_t *p_node = NULL;
tGATT_TCB *p_tcb = NULL;
for(p_node = list_begin(gatt_cb.p_tcb_list); p_node; p_node = list_next(p_node)) {
p_tcb = list_node(p_node);
fixed_queue_free(p_tcb->pending_enc_clcb, NULL);
p_tcb->pending_enc_clcb = NULL;
fixed_queue_free(p_tcb->pending_ind_q, NULL);
p_tcb->pending_ind_q = NULL;
btu_free_timer(&p_tcb->conf_timer_ent);
memset(&p_tcb->conf_timer_ent, 0, sizeof(TIMER_LIST_ENT));
btu_free_timer(&p_tcb->ind_ack_timer_ent);
memset(&p_tcb->ind_ack_timer_ent, 0, sizeof(TIMER_LIST_ENT));
#if (GATTS_INCLUDED == TRUE)
fixed_queue_free(p_tcb->sr_cmd.multi_rsp_q, NULL);
p_tcb->sr_cmd.multi_rsp_q = NULL;
#endif /* #if (GATTS_INCLUDED == TRUE) */
}
list_free(gatt_cb.p_tcb_list);
#if (GATTC_INCLUDED == TRUE)
list_free(gatt_cb.p_clcb_list);
#endif //(GATTC_INCLUDED == TRUE)
#if (GATTS_INCLUDED == TRUE)
for (int i = 0; i < GATT_MAX_SR_PROFILES; i++) {
gatt_remove_an_item_from_list(&gatt_cb.hdl_list_info, &gatt_cb.hdl_list[i]);
gatt_free_attr_value_buffer(&gatt_cb.hdl_list[i]);
gatt_free_hdl_buffer(&gatt_cb.hdl_list[i]);
}
#endif /* #if (GATTS_INCLUDED == TRUE) */
#if GATT_DYNAMIC_MEMORY
FREE_AND_RESET(gatt_cb_ptr);
#endif /* #if GATT_DYNAMIC_MEMORY */
}
#endif ///GATTS_INCLUDED == TRUE
/*******************************************************************************
**
** 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.
** bd_addr_type: emote device address type.
** Returns TRUE if connection is started, otherwise return FALSE.
**
*******************************************************************************/
BOOLEAN gatt_connect (BD_ADDR rem_bda, tBLE_ADDR_TYPE bd_addr_type, tGATT_TCB *p_tcb, tBT_TRANSPORT transport, BOOLEAN is_aux)
{
BOOLEAN gatt_ret = FALSE;
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 = L2CAP_ATT_CID;
gatt_ret = L2CA_ConnectFixedChnl (L2CAP_ATT_CID, rem_bda, bd_addr_type, is_aux);
#if (CLASSIC_BT_GATT_INCLUDED == TRUE)
} else {
if ((p_tcb->att_lcid = L2CA_ConnectReq(BT_PSM_ATT, rem_bda)) != 0) {
gatt_ret = TRUE;
}
#endif ///CLASSIC_BT_GATT_INCLUDED == TRUE
}
return gatt_ret;
}
/*******************************************************************************
**
** 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.
**
*******************************************************************************/
BOOLEAN gatt_disconnect (tGATT_TCB *p_tcb)
{
BOOLEAN ret = FALSE;
tGATT_CH_STATE ch_state;
GATT_TRACE_DEBUG ("gatt_disconnect ");
if (p_tcb != NULL) {
ret = TRUE;
if ( (ch_state = gatt_get_ch_state(p_tcb)) != GATT_CH_CLOSING ) {
if (p_tcb->att_lcid == L2CAP_ATT_CID) {
if (ch_state == GATT_CH_OPEN) {
/* only LCB exist between remote device and local */
ret = L2CA_RemoveFixedChnl (L2CAP_ATT_CID, p_tcb->peer_bda);
} else {
gatt_set_ch_state(p_tcb, GATT_CH_CLOSING);
ret = L2CA_CancelBleConnectReq (p_tcb->peer_bda);
}
#if (CLASSIC_BT_GATT_INCLUDED == TRUE)
} else {
ret = L2CA_DisconnectReq(p_tcb->att_lcid);
#endif ///CLASSIC_BT_GATT_INCLUDED == TRUE
}
} else {
GATT_TRACE_DEBUG ("gatt_disconnect already in closing state");
}
}
return ret;
}
/*******************************************************************************
**
** Function gatt_update_app_hold_link_status
**
** Description Update the application use link status
**
** Returns void.
**
*******************************************************************************/
void gatt_update_app_hold_link_status (tGATT_IF gatt_if, tGATT_TCB *p_tcb, BOOLEAN is_add)
{
UINT8 i;
BOOLEAN found = FALSE;
if (p_tcb == NULL) {
GATT_TRACE_ERROR("gatt_update_app_hold_link_status p_tcb=NULL");
return;
}
for (i = 0; i < GATT_MAX_APPS; i++) {
if (p_tcb->app_hold_link[i] == gatt_if) {
found = TRUE;
if (!is_add) {
p_tcb->app_hold_link[i] = 0;
break;
}
}
}
if (!found && is_add) {
for (i = 0; i < GATT_MAX_APPS; i++) {
if (p_tcb->app_hold_link[i] == 0) {
p_tcb->app_hold_link[i] = gatt_if;
found = TRUE;
break;
}
}
}
GATT_TRACE_DEBUG("gatt_update_app_hold_link_status found=%d[1-found] idx=%d gatt_if=%d is_add=%d", found, i, gatt_if, is_add);
}
/*******************************************************************************
**
** 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, BOOLEAN is_add, BOOLEAN check_acl_link)
{
GATT_TRACE_DEBUG("gatt_update_app_use_link_flag is_add=%d chk_link=%d",
is_add, check_acl_link);
gatt_update_app_hold_link_status(gatt_if, p_tcb, is_add);
if (check_acl_link &&
p_tcb &&
p_tcb->att_lcid == L2CAP_ATT_CID && /* only update link idle timer for fixed channel */
(BTM_GetHCIConnHandle(p_tcb->peer_bda, p_tcb->transport) != GATT_INVALID_ACL_HANDLE)) {
if (is_add) {
GATT_TRACE_DEBUG("GATT disables 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 (!gatt_num_apps_hold_link(p_tcb)) {
/* acl link is connected but no application needs to use the link
so set the timeout value to GATT_LINK_IDLE_TIMEOUT_WHEN_NO_APP seconds */
GATT_TRACE_DEBUG("GATT starts link idle timer =%d sec", GATT_LINK_IDLE_TIMEOUT_WHEN_NO_APP);
GATT_SetIdleTimeout(p_tcb->peer_bda, GATT_LINK_IDLE_TIMEOUT_WHEN_NO_APP, p_tcb->transport);
}
}
}
}
/*******************************************************************************
**
** Function gatt_act_connect
**
** Description GATT connection initiation.
**
** Returns void.
**
*******************************************************************************/
BOOLEAN gatt_act_connect (tGATT_REG *p_reg, BD_ADDR bd_addr,
tBLE_ADDR_TYPE bd_addr_type, tBT_TRANSPORT transport, BOOLEAN is_aux)
{
BOOLEAN ret = FALSE;
tGATT_TCB *p_tcb;
UINT8 st;
if ((p_tcb = gatt_find_tcb_by_addr(bd_addr, transport)) != NULL) {
ret = TRUE;
st = gatt_get_ch_state(p_tcb);
/* before link down, another app try to open a GATT connection */
if (st == GATT_CH_OPEN && gatt_num_apps_hold_link(p_tcb) == 0 &&
transport == BT_TRANSPORT_LE ) {
if (!gatt_connect(bd_addr, bd_addr_type, p_tcb, transport, is_aux)) {
ret = FALSE;
}
} else if (st == GATT_CH_CLOSING) {
/* need to complete the closing first */
ret = FALSE;
} else {
GATT_TRACE_WARNING("gatt_connect wrong state %d", st);
}
} else {
if ((p_tcb = gatt_allocate_tcb_by_bdaddr(bd_addr, transport)) != NULL) {
if (!gatt_connect(bd_addr, bd_addr_type, p_tcb, transport, is_aux)) {
GATT_TRACE_ERROR("gatt_connect failed");
// code enter here if create connection failed. if disconnect after connection, code will not enter here
// p_tcb, p_tcb->pending_enc_clcb, and p_tcb->pending_ind_q have been freed in gatt_cleanup_upon_disc(),
// but here p_tcb is get from gatt_allocate_tcb_by_bdaddr(), is too old, so we get p_tcb again
p_tcb = gatt_find_tcb_by_addr(bd_addr, transport);
if(p_tcb != NULL) {
if(p_tcb->pending_enc_clcb != NULL) {
fixed_queue_free(p_tcb->pending_enc_clcb, NULL);
}
if(p_tcb->pending_ind_q != NULL) {
fixed_queue_free(p_tcb->pending_ind_q, NULL);
}
gatt_tcb_free(p_tcb);
}
} else {
ret = TRUE;
}
} else {
ret = 0;
GATT_TRACE_ERROR("Max TCB for gatt_if [%d] reached.", p_reg->gatt_if);
}
}
if (ret) {
gatt_update_app_use_link_flag(p_reg->gatt_if, p_tcb, TRUE, FALSE);
}
return ret;
}
/*******************************************************************************
**
** Function gatt_le_connect_cback
**
** Description 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 chan, BD_ADDR bd_addr, BOOLEAN connected,
UINT16 reason, tBT_TRANSPORT transport)
{
tGATT_TCB *p_tcb = gatt_find_tcb_by_addr(bd_addr, transport);
BOOLEAN check_srv_chg = FALSE;
tGATTS_SRV_CHG *p_srv_chg_clt = NULL;
/* ignore all fixed channel connect/disconnect on BR/EDR link for GATT */
if (transport == BT_TRANSPORT_BR_EDR) {
return;
}
GATT_TRACE_DEBUG ("GATT ATT protocol channel with BDA: %08x%04x is %s",
(bd_addr[0] << 24) + (bd_addr[1] << 16) + (bd_addr[2] << 8) + bd_addr[3],
(bd_addr[4] << 8) + bd_addr[5], (connected) ? "connected" : "disconnected");
if ((p_srv_chg_clt = gatt_is_bda_in_the_srv_chg_clt_list(bd_addr)) != 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) {
/* 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) {
#if (GATTS_INCLUDED == TRUE)
gatt_chk_srv_chg (p_srv_chg_clt);
#endif ///GATTS_INCLUDED == TRUE
}
}
/* this is incoming connection or background connection callback */
else {
if ((p_tcb = gatt_allocate_tcb_by_bdaddr(bd_addr, BT_TRANSPORT_LE)) != NULL) {
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) {
#if (GATTS_INCLUDED == TRUE)
gatt_chk_srv_chg (p_srv_chg_clt);
#endif ///GATTS_INCLUDED == TRUE
}
} else {
GATT_TRACE_ERROR("CCB max out, no rsources");
}
}
} else {
gatt_cleanup_upon_disc(bd_addr, reason, transport);
GATT_TRACE_DEBUG ("ATT disconnected");
}
}
/*******************************************************************************
**
** Function gatt_channel_congestion
**
** Description This function is called to process the congestion callback
** from lcb
**
** Returns void
**
*******************************************************************************/
static void gatt_channel_congestion(tGATT_TCB *p_tcb, BOOLEAN congested)
{
UINT8 i = 0;
tGATT_REG *p_reg = NULL;
UINT16 conn_id;
#if (GATTC_INCLUDED == TRUE)
/* if uncongested, check to see if there is any more pending data */
if (p_tcb != NULL && congested == FALSE) {
gatt_cl_send_next_cmd_inq(p_tcb);
}
#endif ///GATTC_INCLUDED == TRUE
/* 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);
}
}
}
}
/*******************************************************************************
**
** Function gatt_le_cong_cback
**
** Description This function is called when GATT fixed channel is congested
** or uncongested.
**
** Returns void
**
*******************************************************************************/
static void gatt_le_cong_cback(BD_ADDR remote_bda, BOOLEAN congested)
{
tGATT_TCB *p_tcb = gatt_find_tcb_by_addr(remote_bda, BT_TRANSPORT_LE);
/* if uncongested, check to see if there is any more pending data */
if (p_tcb != NULL) {
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 chan, BD_ADDR bd_addr, BT_HDR *p_buf)
{
tGATT_TCB *p_tcb;
/* Find CCB based on bd addr */
if ((p_tcb = gatt_find_tcb_by_addr (bd_addr, BT_TRANSPORT_LE)) != NULL &&
gatt_get_ch_state(p_tcb) >= GATT_CH_OPEN) {
gatt_data_process(p_tcb, p_buf);
} else {
osi_free (p_buf);
if (p_tcb != NULL) {
GATT_TRACE_WARNING ("ATT - Ignored L2CAP data while in state: %d\n",
gatt_get_ch_state(p_tcb));
}
}
}
/*******************************************************************************
**
** 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
**
*******************************************************************************/
#if (CLASSIC_BT_GATT_INCLUDED == TRUE)
static void gatt_l2cif_connect_ind_cback (BD_ADDR bd_addr, UINT16 lcid, UINT16 psm, UINT8 id)
{
/* do we already have a control channel for this peer? */
UINT8 result = L2CAP_CONN_OK;
tL2CAP_CFG_INFO cfg;
tGATT_TCB *p_tcb = gatt_find_tcb_by_addr(bd_addr, BT_TRANSPORT_BR_EDR);
UNUSED(psm);
GATT_TRACE_ERROR("Connection indication cid = %d", lcid);
/* new connection ? */
if (p_tcb == NULL) {
/* allocate tcb */
if ((p_tcb = gatt_allocate_tcb_by_bdaddr(bd_addr, BT_TRANSPORT_BR_EDR)) == 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;
}
/* Send L2CAP connect rsp */
L2CA_ConnectRsp(bd_addr, id, lcid, result, 0);
/* if result ok, proceed with connection */
if (result == L2CAP_CONN_OK) {
/* transition to configuration state */
gatt_set_ch_state(p_tcb, GATT_CH_CFG);
/* Send L2CAP config req */
memset(&cfg, 0, sizeof(tL2CAP_CFG_INFO));
cfg.mtu_present = TRUE;
cfg.mtu = gatt_default.local_mtu;
L2CA_ConfigReq(lcid, &cfg);
}
}
/*******************************************************************************
**
** Function gatt_l2c_connect_cfm_cback
**
** Description This is the L2CAP connect confirm callback function.
**
**
** Returns void
**
*******************************************************************************/
static void gatt_l2cif_connect_cfm_cback(UINT16 lcid, UINT16 result)
{
tGATT_TCB *p_tcb;
tL2CAP_CFG_INFO cfg;
/* look up clcb for this channel */
if ((p_tcb = gatt_find_tcb_by_cid(lcid)) != NULL) {
GATT_TRACE_DEBUG("gatt_l2c_connect_cfm_cback result: %d ch_state: %d, lcid:0x%x", result, gatt_get_ch_state(p_tcb), p_tcb->att_lcid);
/* if in correct state */
if (gatt_get_ch_state(p_tcb) == GATT_CH_CONN) {
/* if result successful */
if (result == L2CAP_CONN_OK) {
/* set channel state */
gatt_set_ch_state(p_tcb, GATT_CH_CFG);
/* Send L2CAP config req */
memset(&cfg, 0, sizeof(tL2CAP_CFG_INFO));
cfg.mtu_present = TRUE;
cfg.mtu = gatt_default.local_mtu;
L2CA_ConfigReq(lcid, &cfg);
}
/* else initiating connection failure */
else {
gatt_cleanup_upon_disc(p_tcb->peer_bda, result, GATT_TRANSPORT_BR_EDR);
}
} else { /* wrong state, disconnect it */
if (result == L2CAP_CONN_OK) {
/* just in case the peer also accepts our connection - Send L2CAP disconnect req */
L2CA_DisconnectReq(lcid);
}
}
}
}
/*******************************************************************************
**
** Function gatt_l2cif_config_cfm_cback
**
** Description This is the L2CAP config confirm callback function.
**
**
** Returns void
**
*******************************************************************************/
void gatt_l2cif_config_cfm_cback(UINT16 lcid, tL2CAP_CFG_INFO *p_cfg)
{
tGATT_TCB *p_tcb;
tGATTS_SRV_CHG *p_srv_chg_clt = NULL;
/* look up clcb for this channel */
if ((p_tcb = gatt_find_tcb_by_cid(lcid)) != NULL) {
/* if in correct state */
if ( gatt_get_ch_state(p_tcb) == GATT_CH_CFG) {
/* if result successful */
if (p_cfg->result == L2CAP_CFG_OK) {
/* update flags */
p_tcb->ch_flags |= GATT_L2C_CFG_CFM_DONE;
/* if configuration complete */
if (p_tcb->ch_flags & GATT_L2C_CFG_IND_DONE) {
gatt_set_ch_state(p_tcb, GATT_CH_OPEN);
if ((p_srv_chg_clt = gatt_is_bda_in_the_srv_chg_clt_list(p_tcb->peer_bda)) != NULL) {
#if (GATTS_INCLUDED == TRUE)
gatt_chk_srv_chg(p_srv_chg_clt);
#endif ///GATTS_INCLUDED == TRUE
} 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);
}
}
/* else failure */
else {
/* Send L2CAP disconnect req */
L2CA_DisconnectReq(lcid);
}
}
}
}
/*******************************************************************************
**
** Function gatt_l2cif_config_ind_cback
**
** Description This is the L2CAP config indication callback function.
**
**
** Returns void
**
*******************************************************************************/
void gatt_l2cif_config_ind_cback(UINT16 lcid, tL2CAP_CFG_INFO *p_cfg)
{
tGATT_TCB *p_tcb;
tGATTS_SRV_CHG *p_srv_chg_clt = NULL;
/* look up clcb for this channel */
if ((p_tcb = gatt_find_tcb_by_cid(lcid)) != NULL) {
/* GATT uses the smaller of our MTU and peer's MTU */
if ( p_cfg->mtu_present &&
(p_cfg->mtu >= GATT_MIN_BR_MTU_SIZE && p_cfg->mtu < L2CAP_DEFAULT_MTU)) {
p_tcb->payload_size = p_cfg->mtu;
} else {
p_tcb->payload_size = L2CAP_DEFAULT_MTU;
}
/* send L2CAP configure response */
memset(p_cfg, 0, sizeof(tL2CAP_CFG_INFO));
p_cfg->result = L2CAP_CFG_OK;
L2CA_ConfigRsp(lcid, p_cfg);
/* if first config ind */
if ((p_tcb->ch_flags & GATT_L2C_CFG_IND_DONE) == 0) {
/* update flags */
p_tcb->ch_flags |= GATT_L2C_CFG_IND_DONE;
/* if configuration complete */
if (p_tcb->ch_flags & GATT_L2C_CFG_CFM_DONE) {
gatt_set_ch_state(p_tcb, GATT_CH_OPEN);
if ((p_srv_chg_clt = gatt_is_bda_in_the_srv_chg_clt_list(p_tcb->peer_bda)) != NULL) {
#if (GATTS_INCLUDED == TRUE)
gatt_chk_srv_chg(p_srv_chg_clt);
#endif ///GATTS_INCLUDED == TRUE
} 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);
}
}
}
}
/*******************************************************************************
**
** Function gatt_l2cif_disconnect_ind_cback
**
** Description This is the L2CAP disconnect indication callback function.
**
**
** Returns void
**
*******************************************************************************/
void gatt_l2cif_disconnect_ind_cback(UINT16 lcid, BOOLEAN ack_needed)
{
tGATT_TCB *p_tcb;
UINT16 reason;
/* look up clcb for this channel */
if ((p_tcb = gatt_find_tcb_by_cid(lcid)) != NULL) {
if (ack_needed) {
/* send L2CAP disconnect response */
L2CA_DisconnectRsp(lcid);
}
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);
}
}
/* if ACL link is still up, no reason is logged, l2cap is disconnect from peer */
if ((reason = L2CA_GetDisconnectReason(p_tcb->peer_bda, p_tcb->transport)) == 0) {
reason = GATT_CONN_TERMINATE_PEER_USER;
}
/* send disconnect callback */
gatt_cleanup_upon_disc(p_tcb->peer_bda, reason, GATT_TRANSPORT_BR_EDR);
}
}
/*******************************************************************************
**
** Function gatt_l2cif_disconnect_cfm_cback
**
** Description This is the L2CAP disconnect confirm callback function.
**
**
** Returns void
**
*******************************************************************************/
static void gatt_l2cif_disconnect_cfm_cback(UINT16 lcid, UINT16 result)
{
tGATT_TCB *p_tcb;
UINT16 reason;
UNUSED(result);
/* look up clcb for this channel */
if ((p_tcb = gatt_find_tcb_by_cid(lcid)) != NULL) {
/* 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);
}
}
/* send disconnect callback */
/* if ACL link is still up, no reason is logged, l2cap is disconnect from peer */
if ((reason = L2CA_GetDisconnectReason(p_tcb->peer_bda, p_tcb->transport)) == 0) {
reason = GATT_CONN_TERMINATE_LOCAL_HOST;
}
gatt_cleanup_upon_disc(p_tcb->peer_bda, reason, GATT_TRANSPORT_BR_EDR);
}
}
/*******************************************************************************
**
** Function gatt_l2cif_data_ind_cback
**
** Description This is the L2CAP data indication callback function.
**
**
** Returns void
**
*******************************************************************************/
static void gatt_l2cif_data_ind_cback(UINT16 lcid, BT_HDR *p_buf)
{
tGATT_TCB *p_tcb;
/* look up clcb for this channel */
if ((p_tcb = gatt_find_tcb_by_cid(lcid)) != NULL &&
gatt_get_ch_state(p_tcb) == GATT_CH_OPEN) {
/* process the data */
gatt_data_process(p_tcb, p_buf);
} else { /* prevent buffer leak */
osi_free(p_buf);
}
}
/*******************************************************************************
**
** Function gatt_l2cif_congest_cback
**
** Description L2CAP congestion callback
**
** Returns void
**
*******************************************************************************/
static void gatt_l2cif_congest_cback (UINT16 lcid, BOOLEAN congested)
{
tGATT_TCB *p_tcb = gatt_find_tcb_by_cid(lcid);
if (p_tcb != NULL) {
gatt_channel_congestion(p_tcb, congested);
}
}
#endif ///CLASSIC_BT_GATT_INCLUDED == TRUE
/*******************************************************************************
**
** Function gatt_send_conn_cback
**
** Description Callback used to notify layer above about a connection.
**
**
** Returns void
**
*******************************************************************************/
static void gatt_send_conn_cback(tGATT_TCB *p_tcb)
{
UINT8 i;
tGATT_REG *p_reg;
tGATT_BG_CONN_DEV *p_bg_dev = NULL;
UINT16 conn_id;
p_bg_dev = gatt_find_bg_dev(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) {
if (p_bg_dev && gatt_is_bg_dev_for_app(p_bg_dev, p_reg->gatt_if)) {
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,
TRUE, 0, p_tcb->transport);
}
}
}
if (gatt_num_apps_hold_link(p_tcb) && 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 *p_tcb, BT_HDR *p_buf)
{
UINT8 *p = (UINT8 *)(p_buf + 1) + p_buf->offset;
UINT8 op_code, pseudo_op_code;
#if (GATTS_INCLUDED == TRUE) || (GATTC_INCLUDED == TRUE)
UINT16 msg_len;
#endif ///(GATTS_INCLUDED == TRUE) || (GATTC_INCLUDED == TRUE)
if (p_buf->len > 0) {
#if (GATTS_INCLUDED == TRUE) || (GATTC_INCLUDED == TRUE)
msg_len = p_buf->len - 1;
#endif ///(GATTS_INCLUDED == TRUE) || (GATTC_INCLUDED == TRUE)
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) {
if (op_code == GATT_SIGN_CMD_WRITE) {
#if (SMP_INCLUDED == TRUE)
gatt_verify_signature(p_tcb, p_buf);
#endif ///SMP_INCLUDED == TRUE
} else {
/* message from client */
if ((op_code % 2) == 0) {
#if (GATTS_INCLUDED == TRUE)
gatt_server_handle_client_req (p_tcb, op_code, msg_len, p);
#endif ///GATTS_INCLUDED == TRUE
} else {
#if (GATTC_INCLUDED == TRUE)
gatt_client_handle_server_rsp (p_tcb, op_code, msg_len, p);
#endif ///GATTC_INCLUDED == TRUE
}
}
} else {
if (op_code & GATT_COMMAND_FLAG) {
GATT_TRACE_ERROR ("ATT - Rcvd L2CAP data, unknown cmd: 0x%x\n", op_code);
} else {
GATT_TRACE_ERROR ("ATT - Rcvd L2CAP data, unknown req: 0x%x\n", op_code);
gatt_send_error_rsp (p_tcb, GATT_REQ_NOT_SUPPORTED, op_code, 0, FALSE);
}
}
} else {
GATT_TRACE_ERROR ("invalid data length, ignore\n");
}
osi_free (p_buf);
}
/*******************************************************************************
**
** Function gatt_add_a_bonded_dev_for_srv_chg
**
** Description Add a bonded dev to the service changed client list
**
** Returns void
**
*******************************************************************************/
void gatt_add_a_bonded_dev_for_srv_chg (BD_ADDR bda)
{
tGATTS_SRV_CHG_REQ req;
tGATTS_SRV_CHG srv_chg_clt;
memcpy(srv_chg_clt.bda, bda, BD_ADDR_LEN);
srv_chg_clt.srv_changed = FALSE;
if (gatt_add_srv_chg_clt(&srv_chg_clt) != NULL) {
memcpy(req.srv_chg.bda, bda, BD_ADDR_LEN);
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);
}
}
}
/*******************************************************************************
**
** Function gatt_send_srv_chg_ind
**
** Description This function is called to send a service changed indication to
** the specified bd address
**
** Returns GATT_SUCCESS if successfully sent; otherwise error code
**
*******************************************************************************/
#if (GATTS_INCLUDED == TRUE)
tGATT_STATUS gatt_send_srv_chg_ind (BD_ADDR peer_bda)
{
UINT8 handle_range[GATT_SIZE_OF_SRV_CHG_HNDL_RANGE];
UINT8 *p = handle_range;
UINT16 conn_id;
tGATT_STATUS status = GATT_ERROR;
GATT_TRACE_DEBUG("gatt_send_srv_chg_ind");
if (gatt_cb.handle_of_h_r) {
if ((conn_id = gatt_profile_find_conn_id_by_bd_addr(peer_bda)) != GATT_INVALID_CONN_ID) {
UINT16_TO_STREAM (p, 1);
UINT16_TO_STREAM (p, 0xFFFF);
status = GATTS_HandleValueIndication (conn_id,
gatt_cb.handle_of_h_r,
GATT_SIZE_OF_SRV_CHG_HNDL_RANGE,
handle_range);
} else {
status = GATT_NOT_FOUND;
GATT_TRACE_ERROR("Unable to find conn_id for %02x%02x%02x%02x%02x%02x ",
peer_bda[0], peer_bda[1], peer_bda[2], peer_bda[3], peer_bda[4], peer_bda[5]);
}
}
return status;
}
/*******************************************************************************
**
** Function gatt_chk_srv_chg
**
** Description Check sending service changed Indication is required or not
** if required then send the Indication
**
** Returns void
**
*******************************************************************************/
void gatt_chk_srv_chg(tGATTS_SRV_CHG *p_srv_chg_clt)
{
GATT_TRACE_DEBUG("gatt_chk_srv_chg srv_changed=%d", p_srv_chg_clt->srv_changed );
if (p_srv_chg_clt->srv_changed) {
gatt_send_srv_chg_ind(p_srv_chg_clt->bda);
}
}
#endif ///GATTS_INCLUDED == TRUE
/*******************************************************************************
**
** Function gatt_init_srv_chg
**
** Description This function is used to initialize the service changed
** attribute value
**
** Returns void
**
*******************************************************************************/
void gatt_init_srv_chg (void)
{
tGATTS_SRV_CHG_REQ req;
tGATTS_SRV_CHG_RSP rsp;
BOOLEAN status;
UINT8 num_clients, i;
tGATTS_SRV_CHG srv_chg_clt;
GATT_TRACE_DEBUG("gatt_init_srv_chg");
if (gatt_cb.cb_info.p_srv_chg_callback) {
status = (*gatt_cb.cb_info.p_srv_chg_callback)(GATTS_SRV_CHG_CMD_READ_NUM_CLENTS, NULL, &rsp);
if (status && rsp.num_clients) {
GATT_TRACE_DEBUG("gatt_init_srv_chg num_srv_chg_clt_clients=%d", rsp.num_clients);
num_clients = rsp.num_clients;
i = 1; /* use one based index */
while ((i <= num_clients) && status) {
req.client_read_index = i;
if ((status = (*gatt_cb.cb_info.p_srv_chg_callback)(GATTS_SRV_CHG_CMD_READ_CLENT, &req, &rsp)) == TRUE) {
memcpy(&srv_chg_clt, &rsp.srv_chg , sizeof(tGATTS_SRV_CHG));
if (gatt_add_srv_chg_clt(&srv_chg_clt) == NULL) {
GATT_TRACE_ERROR("Unable to add a service change client");
status = FALSE;
}
}
i++;
}
}
} else {
GATT_TRACE_DEBUG("gatt_init_srv_chg callback not registered yet");
}
}
/*******************************************************************************
**
** Function gatt_proc_srv_chg
**
** Description This function is process the service changed request
**
** Returns void
**
*******************************************************************************/
#if (GATTS_INCLUDED == TRUE)
void gatt_proc_srv_chg (void)
{
UINT8 start_idx, found_idx;
BD_ADDR bda;
BOOLEAN srv_chg_ind_pending = FALSE;
tGATT_TCB *p_tcb;
tBT_TRANSPORT transport;
GATT_TRACE_DEBUG ("gatt_proc_srv_chg");
if (gatt_cb.cb_info.p_srv_chg_callback && gatt_cb.handle_of_h_r) {
gatt_set_srv_chg();
start_idx = 0;
while (gatt_find_the_connected_bda(start_idx, bda, &found_idx, &transport)) {
p_tcb = gatt_get_tcb_by_idx(found_idx);
srv_chg_ind_pending = gatt_is_srv_chg_ind_pending(p_tcb);
if (!srv_chg_ind_pending) {
gatt_send_srv_chg_ind(bda);
} else {
GATT_TRACE_DEBUG ("discard srv chg - already has one in the queue");
}
start_idx = ++found_idx;
}
}
}
#endif ///GATTS_INCLUDED == TRUE
/*******************************************************************************
**
** Function gatt_set_ch_state
**
** Description This function set the ch_state in tcb
**
** Returns none
**
*******************************************************************************/
void gatt_set_ch_state(tGATT_TCB *p_tcb, tGATT_CH_STATE ch_state)
{
if (p_tcb) {
GATT_TRACE_DEBUG ("gatt_set_ch_state: old=%d new=%d", p_tcb->ch_state, ch_state);
p_tcb->ch_state = ch_state;
}
}
/*******************************************************************************
**
** Function gatt_get_ch_state
**
** Description This function get the ch_state in tcb
**
** Returns none
**
*******************************************************************************/
tGATT_CH_STATE gatt_get_ch_state(tGATT_TCB *p_tcb)
{
tGATT_CH_STATE ch_state = GATT_CH_CLOSE;
if (p_tcb) {
GATT_TRACE_DEBUG ("gatt_get_ch_state: ch_state=%d", p_tcb->ch_state);
ch_state = p_tcb->ch_state;
}
return ch_state;
}
uint16_t gatt_get_local_mtu(void)
{
return gatt_default.local_mtu;
}
void gatt_set_local_mtu(uint16_t mtu)
{
gatt_default.local_mtu = mtu;
}
#endif /* BLE_INCLUDED */
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