/****************************************************************************** * * Copyright (C) 2003-2012 Broadcom Corporation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ******************************************************************************/ /****************************************************************************** * * This file contains the GATT client main functions and state machine. * ******************************************************************************/ #include "bt_target.h" #if defined(BTA_GATT_INCLUDED) && (BTA_GATT_INCLUDED == TRUE) #include #include "bta_gattc_int.h" #include "gki.h" /***************************************************************************** ** Constants and types *****************************************************************************/ /* state machine action enumeration list */ enum { BTA_GATTC_OPEN, BTA_GATTC_OPEN_FAIL, //BTA_GATTC_OPEN_FAIL_IN_CONN, //<--- need to remove this? BTA_GATTC_OPEN_ERROR, BTA_GATTC_CANCEL_OPEN, BTA_GATTC_CANCEL_OPEN_OK, BTA_GATTC_CANCEL_OPEN_ERROR, BTA_GATTC_CONN, BTA_GATTC_START_DISCOVER, BTA_GATTC_DISC_CMPL, BTA_GATTC_Q_CMD, BTA_GATTC_CLOSE, BTA_GATTC_CLOSE_FAIL, BTA_GATTC_READ, BTA_GATTC_WRITE, BTA_GATTC_OP_CMPL, BTA_GATTC_SEARCH, BTA_GATTC_FAIL, BTA_GATTC_CONFIRM, BTA_GATTC_EXEC, BTA_GATTC_READ_MULTI, BTA_GATTC_CI_OPEN, BTA_GATTC_CI_LOAD, BTA_GATTC_CI_SAVE, BTA_GATTC_CACHE_OPEN, BTA_GATTC_IGNORE_OP_CMPL, BTA_GATTC_IGNORE }; /* type for action functions */ typedef void (*tBTA_GATTC_ACTION)(tBTA_GATTC_CLCB *p_clcb, tBTA_GATTC_DATA *p_data); /* action function list */ const tBTA_GATTC_ACTION bta_gattc_action[] = { bta_gattc_open, bta_gattc_open_fail, //bta_gattc_open_fail_in_conn, //<--- need to remove this? bta_gattc_open_error, bta_gattc_cancel_open, bta_gattc_cancel_open_ok, bta_gattc_cancel_open_error, bta_gattc_conn, bta_gattc_start_discover, bta_gattc_disc_cmpl, bta_gattc_q_cmd, bta_gattc_close, bta_gattc_close_fail, bta_gattc_read, bta_gattc_write, bta_gattc_op_cmpl, bta_gattc_search, bta_gattc_fail, bta_gattc_confirm, bta_gattc_execute, bta_gattc_read_multi, bta_gattc_ci_open, bta_gattc_ci_load, bta_gattc_ci_save, bta_gattc_cache_open, bta_gattc_ignore_op_cmpl }; /* state table information */ #define BTA_GATTC_ACTIONS 1 /* number of actions */ #define BTA_GATTC_NEXT_STATE 1 /* position of next state */ #define BTA_GATTC_NUM_COLS 2 /* number of columns in state tables */ /* state table for idle state */ static const UINT8 bta_gattc_st_idle[][BTA_GATTC_NUM_COLS] = { /* Event Action 1 Next state */ /* BTA_GATTC_API_OPEN_EVT */ {BTA_GATTC_OPEN, BTA_GATTC_W4_CONN_ST}, /* BTA_GATTC_INT_OPEN_FAIL_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_IDLE_ST}, /* BTA_GATTC_API_CANCEL_OPEN_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_IDLE_ST}, /* BTA_GATTC_INT_CANCEL_OPEN_OK_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_IDLE_ST}, /* BTA_GATTC_API_READ_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_IDLE_ST}, /* BTA_GATTC_API_WRITE_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_IDLE_ST}, /* BTA_GATTC_API_EXEC_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_IDLE_ST}, /* BTA_GATTC_API_CLOSE_EVT */ {BTA_GATTC_CLOSE_FAIL, BTA_GATTC_IDLE_ST}, /* BTA_GATTC_API_SEARCH_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_IDLE_ST}, /* BTA_GATTC_API_CONFIRM_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_IDLE_ST}, /* BTA_GATTC_API_READ_MULTI_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_IDLE_ST}, /* BTA_GATTC_INT_CONN_EVT */ {BTA_GATTC_CONN, BTA_GATTC_CONN_ST}, /* BTA_GATTC_INT_DISCOVER_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_IDLE_ST}, /* BTA_GATTC_DISCOVER_CMPL_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_IDLE_ST}, /* BTA_GATTC_OP_CMPL_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_IDLE_ST}, /* BTA_GATTC_INT_DISCONN_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_IDLE_ST}, /* ===> for cache loading, saving */ /* BTA_GATTC_START_CACHE_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_IDLE_ST}, /* BTA_GATTC_CI_CACHE_OPEN_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_IDLE_ST}, /* BTA_GATTC_CI_CACHE_LOAD_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_IDLE_ST}, /* BTA_GATTC_CI_CACHE_SAVE_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_IDLE_ST} }; /* state table for wait for open state */ static const UINT8 bta_gattc_st_w4_conn[][BTA_GATTC_NUM_COLS] = { /* Event Action 1 Next state */ /* BTA_GATTC_API_OPEN_EVT */ {BTA_GATTC_OPEN, BTA_GATTC_W4_CONN_ST}, /* BTA_GATTC_INT_OPEN_FAIL_EVT */ {BTA_GATTC_OPEN_FAIL, BTA_GATTC_IDLE_ST}, /* BTA_GATTC_API_CANCEL_OPEN_EVT */ {BTA_GATTC_CANCEL_OPEN, BTA_GATTC_W4_CONN_ST}, /* BTA_GATTC_INT_CANCEL_OPEN_OK_EVT */ {BTA_GATTC_CANCEL_OPEN_OK, BTA_GATTC_IDLE_ST}, /* BTA_GATTC_API_READ_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_W4_CONN_ST}, /* BTA_GATTC_API_WRITE_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_W4_CONN_ST}, /* BTA_GATTC_API_EXEC_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_W4_CONN_ST}, /* BTA_GATTC_API_CLOSE_EVT */ {BTA_GATTC_CLOSE_FAIL, BTA_GATTC_W4_CONN_ST}, /* BTA_GATTC_API_SEARCH_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_W4_CONN_ST}, /* BTA_GATTC_API_CONFIRM_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_W4_CONN_ST}, /* BTA_GATTC_API_READ_MULTI_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_W4_CONN_ST}, /* BTA_GATTC_INT_CONN_EVT */ {BTA_GATTC_CONN, BTA_GATTC_CONN_ST}, /* BTA_GATTC_INT_DISCOVER_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_W4_CONN_ST}, /* BTA_GATTC_DISCOVER_CMPL_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_W4_CONN_ST}, /* BTA_GATTC_OP_CMPL_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_W4_CONN_ST}, /* BTA_GATTC_INT_DISCONN_EVT */ {BTA_GATTC_CLOSE, BTA_GATTC_IDLE_ST}, /* ===> for cache loading, saving */ /* BTA_GATTC_START_CACHE_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_W4_CONN_ST}, /* BTA_GATTC_CI_CACHE_OPEN_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_W4_CONN_ST}, /* BTA_GATTC_CI_CACHE_LOAD_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_W4_CONN_ST}, /* BTA_GATTC_CI_CACHE_SAVE_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_W4_CONN_ST} }; /* state table for open state */ static const UINT8 bta_gattc_st_connected[][BTA_GATTC_NUM_COLS] = { /* Event Action 1 Next state */ /* BTA_GATTC_API_OPEN_EVT */ {BTA_GATTC_OPEN_ERROR, BTA_GATTC_CONN_ST}, /* BTA_GATTC_INT_OPEN_FAIL_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_CONN_ST}, /* BTA_GATTC_API_CANCEL_OPEN_EVT */ {BTA_GATTC_CANCEL_OPEN_ERROR, BTA_GATTC_CONN_ST}, /* BTA_GATTC_INT_CANCEL_OPEN_OK_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_CONN_ST}, /* BTA_GATTC_API_READ_EVT */ {BTA_GATTC_READ, BTA_GATTC_CONN_ST}, /* BTA_GATTC_API_WRITE_EVT */ {BTA_GATTC_WRITE, BTA_GATTC_CONN_ST}, /* BTA_GATTC_API_EXEC_EVT */ {BTA_GATTC_EXEC, BTA_GATTC_CONN_ST}, /* BTA_GATTC_API_CLOSE_EVT */ {BTA_GATTC_CLOSE, BTA_GATTC_IDLE_ST}, //BTA_GATTC_CLOSING_ST /* BTA_GATTC_API_SEARCH_EVT */ {BTA_GATTC_SEARCH, BTA_GATTC_CONN_ST}, /* BTA_GATTC_API_CONFIRM_EVT */ {BTA_GATTC_CONFIRM, BTA_GATTC_CONN_ST}, /* BTA_GATTC_API_READ_MULTI_EVT */ {BTA_GATTC_READ_MULTI, BTA_GATTC_CONN_ST}, /* BTA_GATTC_INT_CONN_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_CONN_ST}, /* BTA_GATTC_INT_DISCOVER_EVT */ {BTA_GATTC_START_DISCOVER, BTA_GATTC_DISCOVER_ST}, /* BTA_GATTC_DISCOVER_CMPL_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_CONN_ST}, /* BTA_GATTC_OP_CMPL_EVT */ {BTA_GATTC_OP_CMPL, BTA_GATTC_CONN_ST}, /* BTA_GATTC_INT_DISCONN_EVT */ {BTA_GATTC_CLOSE, BTA_GATTC_IDLE_ST}, /* ===> for cache loading, saving */ /* BTA_GATTC_START_CACHE_EVT */ {BTA_GATTC_CACHE_OPEN, BTA_GATTC_DISCOVER_ST}, /* BTA_GATTC_CI_CACHE_OPEN_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_CONN_ST}, /* BTA_GATTC_CI_CACHE_LOAD_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_CONN_ST}, /* BTA_GATTC_CI_CACHE_SAVE_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_CONN_ST} }; /* state table for discover state */ static const UINT8 bta_gattc_st_discover[][BTA_GATTC_NUM_COLS] = { /* Event Action 1 Next state */ /* BTA_GATTC_API_OPEN_EVT */ {BTA_GATTC_OPEN_ERROR, BTA_GATTC_DISCOVER_ST}, /* BTA_GATTC_INT_OPEN_FAIL_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_DISCOVER_ST}, /* BTA_GATTC_API_CANCEL_OPEN_EVT */ {BTA_GATTC_CANCEL_OPEN_ERROR, BTA_GATTC_DISCOVER_ST}, /* BTA_GATTC_INT_CANCEL_OPEN_OK_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_DISCOVER_ST}, /* BTA_GATTC_API_READ_EVT */ {BTA_GATTC_Q_CMD, BTA_GATTC_DISCOVER_ST}, /* BTA_GATTC_API_WRITE_EVT */ {BTA_GATTC_Q_CMD, BTA_GATTC_DISCOVER_ST}, /* BTA_GATTC_API_EXEC_EVT */ {BTA_GATTC_Q_CMD, BTA_GATTC_DISCOVER_ST}, /* BTA_GATTC_API_CLOSE_EVT */ {BTA_GATTC_CLOSE, BTA_GATTC_IDLE_ST }, //BTA_GATTC_CLOSING_ST /* BTA_GATTC_API_SEARCH_EVT */ {BTA_GATTC_Q_CMD, BTA_GATTC_DISCOVER_ST}, /* BTA_GATTC_API_CONFIRM_EVT */ {BTA_GATTC_CONFIRM, BTA_GATTC_DISCOVER_ST}, /* BTA_GATTC_API_READ_MULTI_EVT */ {BTA_GATTC_Q_CMD, BTA_GATTC_DISCOVER_ST}, /* BTA_GATTC_INT_CONN_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_DISCOVER_ST}, /* BTA_GATTC_INT_DISCOVER_EVT */ {BTA_GATTC_START_DISCOVER, BTA_GATTC_DISCOVER_ST}, /* BTA_GATTC_DISCOVER_CMPL_EVT */ {BTA_GATTC_DISC_CMPL, BTA_GATTC_CONN_ST}, /* BTA_GATTC_OP_CMPL_EVT */ {BTA_GATTC_IGNORE_OP_CMPL, BTA_GATTC_DISCOVER_ST}, /* BTA_GATTC_INT_DISCONN_EVT */ {BTA_GATTC_CLOSE, BTA_GATTC_IDLE_ST}, /* ===> for cache loading, saving */ /* BTA_GATTC_START_CACHE_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_DISCOVER_ST}, /* BTA_GATTC_CI_CACHE_OPEN_EVT */ {BTA_GATTC_CI_OPEN, BTA_GATTC_DISCOVER_ST}, /* BTA_GATTC_CI_CACHE_LOAD_EVT */ {BTA_GATTC_CI_LOAD, BTA_GATTC_DISCOVER_ST}, /* BTA_GATTC_CI_CACHE_SAVE_EVT */ {BTA_GATTC_CI_SAVE, BTA_GATTC_DISCOVER_ST} }; /* type for state table */ typedef const UINT8 (*tBTA_GATTC_ST_TBL)[BTA_GATTC_NUM_COLS]; /* state table */ const tBTA_GATTC_ST_TBL bta_gattc_st_tbl[] = { bta_gattc_st_idle, bta_gattc_st_w4_conn, bta_gattc_st_connected, bta_gattc_st_discover }; /***************************************************************************** ** Global data *****************************************************************************/ /* GATTC control block */ #if BTA_DYNAMIC_MEMORY == FALSE tBTA_GATTC_CB bta_gattc_cb; #endif #if BTA_GATT_DEBUG == TRUE static char *gattc_evt_code(tBTA_GATTC_INT_EVT evt_code); static char *gattc_state_code(tBTA_GATTC_STATE state_code); #endif /******************************************************************************* ** ** Function bta_gattc_sm_execute ** ** Description State machine event handling function for GATTC ** ** ** Returns void ** *******************************************************************************/ void bta_gattc_sm_execute(tBTA_GATTC_CLCB *p_clcb, UINT16 event, tBTA_GATTC_DATA *p_data) { tBTA_GATTC_ST_TBL state_table; UINT8 action; int i; #if BTA_GATT_DEBUG == TRUE tBTA_GATTC_STATE in_state = p_clcb->state; UINT16 in_event = event; APPL_TRACE_DEBUG4("bta_gattc_sm_execute: State 0x%02x [%s], Event 0x%x[%s]", in_state, gattc_state_code(in_state), in_event, gattc_evt_code(in_event)); #endif /* look up the state table for the current state */ state_table = bta_gattc_st_tbl[p_clcb->state]; event &= 0x00FF; /* set next state */ p_clcb->state = state_table[event][BTA_GATTC_NEXT_STATE]; /* execute action functions */ for (i = 0; i < BTA_GATTC_ACTIONS; i++) { if ((action = state_table[event][i]) != BTA_GATTC_IGNORE) { (*bta_gattc_action[action])(p_clcb, p_data); } else { break; } } #if BTA_GATT_DEBUG == TRUE if (in_state != p_clcb->state) { APPL_TRACE_DEBUG3("GATTC State Change: [%s] -> [%s] after Event [%s]", gattc_state_code(in_state), gattc_state_code(p_clcb->state), gattc_evt_code(in_event)); } #endif } /******************************************************************************* ** ** Function bta_gattc_hdl_event ** ** Description GATT client main event handling function. ** ** ** Returns void ** *******************************************************************************/ BOOLEAN bta_gattc_hdl_event(BT_HDR *p_msg) { tBTA_GATTC_CB *p_cb = &bta_gattc_cb; tBTA_GATTC_CLCB *p_clcb = NULL; #if BTA_GATT_DEBUG == TRUE APPL_TRACE_DEBUG1("bta_gattc_hdl_event: Event [%s]", gattc_evt_code(p_msg->event)); #endif switch (p_msg->event) { case BTA_GATTC_API_REG_EVT: bta_gattc_register(p_cb, (tBTA_GATTC_DATA *) p_msg); break; case BTA_GATTC_INT_START_IF_EVT: bta_gattc_start_if(p_cb, (tBTA_GATTC_DATA *) p_msg); break; case BTA_GATTC_API_DEREG_EVT: bta_gattc_deregister(p_cb, (tBTA_GATTC_DATA *) p_msg); break; case BTA_GATTC_INT_DEREG_EVT: bta_gattc_int_deregister(p_cb, (tBTA_GATTC_DATA *) p_msg); break; case BTA_GATTC_API_OPEN_EVT: bta_gattc_process_api_open(p_cb, (tBTA_GATTC_DATA *) p_msg); break; case BTA_GATTC_API_CANCEL_OPEN_EVT: bta_gattc_process_api_open_cancel(p_cb, (tBTA_GATTC_DATA *) p_msg); break; default: if ((p_clcb = bta_gattc_find_clcb_by_conn_id(p_msg->layer_specific)) != NULL) { bta_gattc_sm_execute(p_clcb, p_msg->event, (tBTA_GATTC_DATA *) p_msg); } else { APPL_TRACE_ERROR1("Unknown conn ID: %d", p_msg->layer_specific); } break; } return(TRUE); } /***************************************************************************** ** Debug Functions *****************************************************************************/ #if BTA_GATT_DEBUG == TRUE /******************************************************************************* ** ** Function gattc_evt_code ** ** Description ** ** Returns void ** *******************************************************************************/ static char *gattc_evt_code(tBTA_GATTC_INT_EVT evt_code) { switch (evt_code) { case BTA_GATTC_API_OPEN_EVT: return "BTA_GATTC_API_OPEN_EVT"; case BTA_GATTC_INT_OPEN_FAIL_EVT: return "BTA_GATTC_INT_OPEN_FAIL_EVT"; case BTA_GATTC_API_CANCEL_OPEN_EVT: return "BTA_GATTC_API_CANCEL_OPEN_EVT"; case BTA_GATTC_INT_CANCEL_OPEN_OK_EVT: return "BTA_GATTC_INT_CANCEL_OPEN_OK_EVT"; case BTA_GATTC_API_READ_EVT: return "BTA_GATTC_API_READ_EVT"; case BTA_GATTC_API_WRITE_EVT: return "BTA_GATTC_API_WRITE_EVT"; case BTA_GATTC_API_EXEC_EVT: return "BTA_GATTC_API_EXEC_EVT"; case BTA_GATTC_API_CLOSE_EVT: return "BTA_GATTC_API_CLOSE_EVT"; case BTA_GATTC_API_SEARCH_EVT: return "BTA_GATTC_API_SEARCH_EVT"; case BTA_GATTC_API_CONFIRM_EVT: return "BTA_GATTC_API_CONFIRM_EVT"; case BTA_GATTC_API_READ_MULTI_EVT: return "BTA_GATTC_API_READ_MULTI_EVT"; case BTA_GATTC_INT_CONN_EVT: return "BTA_GATTC_INT_CONN_EVT"; case BTA_GATTC_INT_DISCOVER_EVT: return "BTA_GATTC_INT_DISCOVER_EVT"; case BTA_GATTC_DISCOVER_CMPL_EVT: return "BTA_GATTC_DISCOVER_CMPL_EVT"; case BTA_GATTC_OP_CMPL_EVT: return "BTA_GATTC_OP_CMPL_EVT"; case BTA_GATTC_INT_DISCONN_EVT: return "BTA_GATTC_INT_DISCONN_EVT"; case BTA_GATTC_START_CACHE_EVT: return "BTA_GATTC_START_CACHE_EVT"; case BTA_GATTC_CI_CACHE_OPEN_EVT: return "BTA_GATTC_CI_CACHE_OPEN_EVT"; case BTA_GATTC_CI_CACHE_LOAD_EVT: return "BTA_GATTC_CI_CACHE_LOAD_EVT"; case BTA_GATTC_CI_CACHE_SAVE_EVT: return "BTA_GATTC_CI_CACHE_SAVE_EVT"; case BTA_GATTC_INT_START_IF_EVT: return "BTA_GATTC_INT_START_IF_EVT"; case BTA_GATTC_API_REG_EVT: return "BTA_GATTC_API_REG_EVT"; case BTA_GATTC_API_DEREG_EVT: return "BTA_GATTC_API_DEREG_EVT"; default: return "unknown GATTC event code"; } } /******************************************************************************* ** ** Function gattc_state_code ** ** Description ** ** Returns void ** *******************************************************************************/ static char *gattc_state_code(tBTA_GATTC_STATE state_code) { switch (state_code) { case BTA_GATTC_IDLE_ST: return "GATTC_IDLE_ST"; case BTA_GATTC_W4_CONN_ST: return "GATTC_W4_CONN_ST"; case BTA_GATTC_CONN_ST: return "GATTC_CONN_ST"; case BTA_GATTC_DISCOVER_ST: return "GATTC_DISCOVER_ST"; default: return "unknown GATTC state code"; } } #endif /* Debug Functions */ #endif /* BTA_GATT_INCLUDED */