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444 lines
15 KiB
444 lines
15 KiB
/******************************************************************************
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*
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* Copyright 2005-2012 Broadcom Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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/******************************************************************************
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*
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* This file contains the HID host main functions and state machine.
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*
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******************************************************************************/
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#include <string.h> // memset
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#include <cstdint>
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#include "bt_target.h" // Must be first to define build configuration
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#if (BTA_HH_INCLUDED == TRUE)
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#include "bta/hh/bta_hh_int.h"
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/*****************************************************************************
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* Global data
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****************************************************************************/
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tBTA_HH_CB bta_hh_cb;
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/*****************************************************************************
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* Static functions
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****************************************************************************/
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static const char* bta_hh_evt_code(tBTA_HH_INT_EVT evt_code);
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static const char* bta_hh_state_code(tBTA_HH_STATE state_code);
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static void bta_hh_better_state_machine(tBTA_HH_DEV_CB* p_cb, uint16_t event,
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const tBTA_HH_DATA* p_data) {
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switch (p_cb->state) {
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case BTA_HH_IDLE_ST:
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switch (event) {
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case BTA_HH_API_OPEN_EVT:
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p_cb->state = BTA_HH_W4_CONN_ST;
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bta_hh_start_sdp(p_cb, p_data);
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break;
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case BTA_HH_INT_OPEN_EVT:
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p_cb->state = BTA_HH_W4_CONN_ST;
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bta_hh_open_act(p_cb, p_data);
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break;
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case BTA_HH_INT_CLOSE_EVT:
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bta_hh_close_act(p_cb, p_data);
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break;
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case BTA_HH_API_MAINT_DEV_EVT:
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bta_hh_maint_dev_act(p_cb, p_data);
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break;
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case BTA_HH_OPEN_CMPL_EVT:
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p_cb->state = BTA_HH_CONN_ST;
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bta_hh_open_cmpl_act(p_cb, p_data);
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break;
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case BTA_HH_GATT_OPEN_EVT:
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p_cb->state = BTA_HH_W4_CONN_ST;
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bta_hh_gatt_open(p_cb, p_data);
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break;
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}
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break;
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case BTA_HH_W4_CONN_ST:
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switch (event) {
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case BTA_HH_API_CLOSE_EVT:
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p_cb->state = BTA_HH_IDLE_ST;
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break;
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case BTA_HH_INT_OPEN_EVT:
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bta_hh_open_act(p_cb, p_data);
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break;
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case BTA_HH_INT_CLOSE_EVT:
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p_cb->state = BTA_HH_IDLE_ST;
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bta_hh_open_failure(p_cb, p_data);
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break;
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case BTA_HH_SDP_CMPL_EVT:
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bta_hh_sdp_cmpl(p_cb, p_data);
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break;
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case BTA_HH_API_WRITE_DEV_EVT:
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bta_hh_write_dev_act(p_cb, p_data);
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break;
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case BTA_HH_API_MAINT_DEV_EVT:
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p_cb->state = BTA_HH_IDLE_ST;
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bta_hh_maint_dev_act(p_cb, p_data);
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break;
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case BTA_HH_OPEN_CMPL_EVT:
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p_cb->state = BTA_HH_CONN_ST;
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bta_hh_open_cmpl_act(p_cb, p_data);
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break;
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case BTA_HH_GATT_CLOSE_EVT:
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p_cb->state = BTA_HH_IDLE_ST;
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bta_hh_le_open_fail(p_cb, p_data);
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break;
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case BTA_HH_GATT_OPEN_EVT:
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bta_hh_gatt_open(p_cb, p_data);
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break;
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case BTA_HH_START_ENC_EVT:
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p_cb->state = BTA_HH_W4_SEC;
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bta_hh_start_security(p_cb, p_data);
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break;
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}
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break;
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case BTA_HH_CONN_ST:
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switch (event) {
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case BTA_HH_API_CLOSE_EVT:
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bta_hh_api_disc_act(p_cb, p_data);
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break;
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case BTA_HH_INT_OPEN_EVT:
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bta_hh_open_act(p_cb, p_data);
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break;
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case BTA_HH_INT_CLOSE_EVT:
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p_cb->state = BTA_HH_IDLE_ST;
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bta_hh_close_act(p_cb, p_data);
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break;
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case BTA_HH_INT_DATA_EVT:
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bta_hh_data_act(p_cb, p_data);
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break;
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case BTA_HH_INT_CTRL_DATA:
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bta_hh_ctrl_dat_act(p_cb, p_data);
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break;
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case BTA_HH_INT_HANDSK_EVT:
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bta_hh_handsk_act(p_cb, p_data);
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break;
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case BTA_HH_API_WRITE_DEV_EVT:
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bta_hh_write_dev_act(p_cb, p_data);
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break;
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case BTA_HH_API_GET_DSCP_EVT:
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bta_hh_get_dscp_act(p_cb, p_data);
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break;
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case BTA_HH_API_MAINT_DEV_EVT:
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bta_hh_maint_dev_act(p_cb, p_data);
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break;
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case BTA_HH_GATT_CLOSE_EVT:
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p_cb->state = BTA_HH_IDLE_ST;
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bta_hh_gatt_close(p_cb, p_data);
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break;
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}
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break;
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case BTA_HH_W4_SEC:
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switch (event) {
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case BTA_HH_API_CLOSE_EVT:
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bta_hh_api_disc_act(p_cb, p_data);
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break;
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case BTA_HH_INT_CLOSE_EVT:
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p_cb->state = BTA_HH_IDLE_ST;
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bta_hh_open_failure(p_cb, p_data);
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break;
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case BTA_HH_API_MAINT_DEV_EVT:
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bta_hh_maint_dev_act(p_cb, p_data);
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break;
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case BTA_HH_GATT_CLOSE_EVT:
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p_cb->state = BTA_HH_IDLE_ST;
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bta_hh_le_open_fail(p_cb, p_data);
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break;
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case BTA_HH_ENC_CMPL_EVT:
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p_cb->state = BTA_HH_W4_CONN_ST;
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bta_hh_security_cmpl(p_cb, p_data);
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break;
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case BTA_HH_GATT_ENC_CMPL_EVT:
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bta_hh_le_notify_enc_cmpl(p_cb, p_data);
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break;
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}
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break;
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}
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}
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/*******************************************************************************
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*
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* Function bta_hh_sm_execute
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*
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* Description State machine event handling function for HID Host
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*
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*
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* Returns void
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*
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******************************************************************************/
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void bta_hh_sm_execute(tBTA_HH_DEV_CB* p_cb, uint16_t event,
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const tBTA_HH_DATA* p_data) {
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tBTA_HH cback_data;
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tBTA_HH_EVT cback_event = 0;
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tBTA_HH_STATE in_state;
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tBTA_HH_INT_EVT debug_event = static_cast<tBTA_HH_INT_EVT>(event);
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memset(&cback_data, 0, sizeof(tBTA_HH));
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/* handle exception, no valid control block was found */
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if (!p_cb) {
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/* BTA HH enabled already? otherwise ignore the event although it's bad*/
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if (bta_hh_cb.p_cback != NULL) {
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switch (event) {
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/* no control block available for new connection */
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case BTA_HH_API_OPEN_EVT:
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cback_event = BTA_HH_OPEN_EVT;
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/* build cback data */
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cback_data.conn.bda = ((tBTA_HH_API_CONN*)p_data)->bd_addr;
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cback_data.conn.status = BTA_HH_ERR_DB_FULL;
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cback_data.conn.handle = BTA_HH_INVALID_HANDLE;
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break;
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/* DB full, BTA_HhAddDev */
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case BTA_HH_API_MAINT_DEV_EVT:
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cback_event = p_data->api_maintdev.sub_event;
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if (p_data->api_maintdev.sub_event == BTA_HH_ADD_DEV_EVT) {
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cback_data.dev_info.bda = p_data->api_maintdev.bda;
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cback_data.dev_info.status = BTA_HH_ERR_DB_FULL;
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cback_data.dev_info.handle = BTA_HH_INVALID_HANDLE;
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} else {
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cback_data.dev_info.status = BTA_HH_ERR_HDL;
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cback_data.dev_info.handle =
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(uint8_t)p_data->api_maintdev.hdr.layer_specific;
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}
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break;
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case BTA_HH_API_WRITE_DEV_EVT:
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cback_event = (p_data->api_sndcmd.t_type - HID_TRANS_GET_REPORT) +
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BTA_HH_GET_RPT_EVT;
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osi_free_and_reset((void**)&p_data->api_sndcmd.p_data);
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if (p_data->api_sndcmd.t_type == HID_TRANS_SET_PROTOCOL ||
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p_data->api_sndcmd.t_type == HID_TRANS_SET_REPORT ||
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p_data->api_sndcmd.t_type == HID_TRANS_SET_IDLE) {
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cback_data.dev_status.status = BTA_HH_ERR_HDL;
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cback_data.dev_status.handle =
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(uint8_t)p_data->api_sndcmd.hdr.layer_specific;
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} else if (p_data->api_sndcmd.t_type != HID_TRANS_DATA &&
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p_data->api_sndcmd.t_type != HID_TRANS_CONTROL) {
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cback_data.hs_data.handle =
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(uint8_t)p_data->api_sndcmd.hdr.layer_specific;
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cback_data.hs_data.status = BTA_HH_ERR_HDL;
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/* hs_data.rsp_data will be all zero, which is not valid value */
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} else if (p_data->api_sndcmd.t_type == HID_TRANS_CONTROL &&
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p_data->api_sndcmd.param ==
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BTA_HH_CTRL_VIRTUAL_CABLE_UNPLUG) {
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cback_data.status = BTA_HH_ERR_HDL;
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cback_event = BTA_HH_VC_UNPLUG_EVT;
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} else
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cback_event = 0;
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break;
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case BTA_HH_API_CLOSE_EVT:
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cback_event = BTA_HH_CLOSE_EVT;
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cback_data.dev_status.status = BTA_HH_ERR_HDL;
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cback_data.dev_status.handle =
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(uint8_t)p_data->api_sndcmd.hdr.layer_specific;
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break;
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default:
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/* invalid handle, call bad API event */
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APPL_TRACE_ERROR("wrong device handle: [%d]",
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p_data->hdr.layer_specific);
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/* Free the callback buffer now */
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if (p_data != NULL)
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osi_free_and_reset((void**)&p_data->hid_cback.p_data);
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break;
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}
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if (cback_event) (*bta_hh_cb.p_cback)(cback_event, &cback_data);
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}
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}
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/* corresponding CB is found, go to state machine */
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else {
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in_state = p_cb->state;
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APPL_TRACE_EVENT("bta_hh_sm_execute: State 0x%02x [%s], Event [%s]",
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in_state, bta_hh_state_code(in_state),
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bta_hh_evt_code(debug_event));
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if ((p_cb->state == BTA_HH_NULL_ST) || (p_cb->state >= BTA_HH_INVALID_ST)) {
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APPL_TRACE_ERROR(
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"bta_hh_sm_execute: Invalid state State = 0x%x, Event = %d",
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p_cb->state, event);
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return;
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}
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bta_hh_better_state_machine(p_cb, event, p_data);
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if (in_state != p_cb->state) {
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LOG_DEBUG("HHID State Change: [%s] -> [%s] after Event [%s]",
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bta_hh_state_code(in_state), bta_hh_state_code(p_cb->state),
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bta_hh_evt_code(debug_event));
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}
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}
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}
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/*******************************************************************************
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*
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* Function bta_hh_hdl_event
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*
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* Description HID host main event handling function.
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*
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*
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* Returns void
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*
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******************************************************************************/
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bool bta_hh_hdl_event(BT_HDR_RIGID* p_msg) {
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uint8_t index = BTA_HH_IDX_INVALID;
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tBTA_HH_DEV_CB* p_cb = NULL;
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switch (p_msg->event) {
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case BTA_HH_API_ENABLE_EVT:
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bta_hh_api_enable((tBTA_HH_DATA*)p_msg);
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break;
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case BTA_HH_API_DISABLE_EVT:
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bta_hh_api_disable();
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break;
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case BTA_HH_DISC_CMPL_EVT: /* disable complete */
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bta_hh_disc_cmpl();
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break;
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default:
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/* all events processed in state machine need to find corresponding
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CB before proceed */
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if (p_msg->event == BTA_HH_API_OPEN_EVT) {
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index = bta_hh_find_cb(((tBTA_HH_API_CONN*)p_msg)->bd_addr);
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} else if (p_msg->event == BTA_HH_API_MAINT_DEV_EVT) {
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/* if add device */
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if (((tBTA_HH_MAINT_DEV*)p_msg)->sub_event == BTA_HH_ADD_DEV_EVT) {
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index = bta_hh_find_cb(((tBTA_HH_MAINT_DEV*)p_msg)->bda);
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} else /* else remove device by handle */
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{
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index = bta_hh_dev_handle_to_cb_idx((uint8_t)p_msg->layer_specific);
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/* If BT disable is done while the HID device is connected and
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* Link_Key uses unauthenticated combination
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* then we can get into a situation where remove_bonding is called
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* with the index set to 0 (without getting
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* cleaned up). Only when VIRTUAL_UNPLUG is called do we cleanup the
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* index and make it MAX_KNOWN.
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* So if REMOVE_DEVICE is called and in_use is false then we should
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* treat this as a NULL p_cb. Hence we
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* force the index to be IDX_INVALID
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*/
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if ((index != BTA_HH_IDX_INVALID) &&
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(!bta_hh_cb.kdev[index].in_use)) {
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index = BTA_HH_IDX_INVALID;
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}
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}
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} else if (p_msg->event == BTA_HH_INT_OPEN_EVT) {
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index = bta_hh_find_cb(((tBTA_HH_CBACK_DATA*)p_msg)->addr);
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} else
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index = bta_hh_dev_handle_to_cb_idx((uint8_t)p_msg->layer_specific);
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if (index != BTA_HH_IDX_INVALID) p_cb = &bta_hh_cb.kdev[index];
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APPL_TRACE_DEBUG("bta_hh_hdl_event:: handle = %d dev_cb[%d] ",
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p_msg->layer_specific, index);
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bta_hh_sm_execute(p_cb, p_msg->event, (tBTA_HH_DATA*)p_msg);
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}
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return (true);
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}
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/*****************************************************************************
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* Debug Functions
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****************************************************************************/
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/*******************************************************************************
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*
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* Function bta_hh_evt_code
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*
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* Description
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*
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* Returns void
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*
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******************************************************************************/
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static const char* bta_hh_evt_code(tBTA_HH_INT_EVT evt_code) {
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switch (evt_code) {
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case BTA_HH_API_DISABLE_EVT:
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return "BTA_HH_API_DISABLE_EVT";
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case BTA_HH_API_ENABLE_EVT:
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return "BTA_HH_API_ENABLE_EVT";
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case BTA_HH_API_OPEN_EVT:
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return "BTA_HH_API_OPEN_EVT";
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case BTA_HH_API_CLOSE_EVT:
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return "BTA_HH_API_CLOSE_EVT";
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case BTA_HH_INT_OPEN_EVT:
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return "BTA_HH_INT_OPEN_EVT";
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case BTA_HH_INT_CLOSE_EVT:
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return "BTA_HH_INT_CLOSE_EVT";
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case BTA_HH_INT_HANDSK_EVT:
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return "BTA_HH_INT_HANDSK_EVT";
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case BTA_HH_INT_DATA_EVT:
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return "BTA_HH_INT_DATA_EVT";
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case BTA_HH_INT_CTRL_DATA:
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return "BTA_HH_INT_CTRL_DATA";
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case BTA_HH_API_WRITE_DEV_EVT:
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return "BTA_HH_API_WRITE_DEV_EVT";
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case BTA_HH_SDP_CMPL_EVT:
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return "BTA_HH_SDP_CMPL_EVT";
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case BTA_HH_DISC_CMPL_EVT:
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return "BTA_HH_DISC_CMPL_EVT";
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case BTA_HH_API_MAINT_DEV_EVT:
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return "BTA_HH_API_MAINT_DEV_EVT";
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case BTA_HH_API_GET_DSCP_EVT:
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return "BTA_HH_API_GET_DSCP_EVT";
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case BTA_HH_OPEN_CMPL_EVT:
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return "BTA_HH_OPEN_CMPL_EVT";
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case BTA_HH_GATT_CLOSE_EVT:
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return "BTA_HH_GATT_CLOSE_EVT";
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case BTA_HH_GATT_OPEN_EVT:
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return "BTA_HH_GATT_OPEN_EVT";
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case BTA_HH_START_ENC_EVT:
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return "BTA_HH_START_ENC_EVT";
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case BTA_HH_ENC_CMPL_EVT:
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return "BTA_HH_ENC_CMPL_EVT";
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default:
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return "unknown HID Host event code";
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}
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}
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/*******************************************************************************
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*
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* Function bta_hh_state_code
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*
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* Description get string representation of HID host state code.
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*
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* Returns void
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*
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******************************************************************************/
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static const char* bta_hh_state_code(tBTA_HH_STATE state_code) {
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switch (state_code) {
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case BTA_HH_NULL_ST:
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return "BTA_HH_NULL_ST";
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case BTA_HH_IDLE_ST:
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return "BTA_HH_IDLE_ST";
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case BTA_HH_W4_CONN_ST:
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return "BTA_HH_W4_CONN_ST";
|
|
case BTA_HH_CONN_ST:
|
|
return "BTA_HH_CONN_ST";
|
|
case BTA_HH_W4_SEC:
|
|
return "BTA_HH_W4_SEC";
|
|
default:
|
|
return "unknown HID Host state";
|
|
}
|
|
}
|
|
|
|
#endif /* BTA_HH_INCLUDED */
|