417 lines
12 KiB
C
417 lines
12 KiB
C
/******************************************************************************
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*
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* Copyright (C) 2004-2012 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 PAN main functions and state machine.
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*
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******************************************************************************/
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#include "bt_target.h"
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#if defined(BTA_PAN_INCLUDED) && (BTA_PAN_INCLUDED == TRUE)
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#include <string.h>
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#include "bta_api.h"
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#include "bta_sys.h"
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#include "bt_common.h"
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#include "pan_api.h"
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#include "bta_pan_api.h"
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#include "bta_pan_int.h"
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#include "utl.h"
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/*****************************************************************************
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** Constants and types
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*****************************************************************************/
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/* state machine action enumeration list */
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enum
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{
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BTA_PAN_API_CLOSE,
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BTA_PAN_TX_PATH,
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BTA_PAN_RX_PATH,
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BTA_PAN_TX_FLOW,
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BTA_PAN_WRITE_BUF,
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BTA_PAN_CONN_OPEN,
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BTA_PAN_CONN_CLOSE,
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BTA_PAN_FREE_BUF,
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BTA_PAN_IGNORE
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};
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/* type for action functions */
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typedef void (*tBTA_PAN_ACTION)(tBTA_PAN_SCB *p_scb, tBTA_PAN_DATA *p_data);
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/* action function list */
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const tBTA_PAN_ACTION bta_pan_action[] =
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{
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bta_pan_api_close,
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bta_pan_tx_path,
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bta_pan_rx_path,
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bta_pan_tx_flow,
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bta_pan_write_buf,
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bta_pan_conn_open,
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bta_pan_conn_close,
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bta_pan_free_buf,
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};
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/* state table information */
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#define BTA_PAN_ACTIONS 1 /* number of actions */
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#define BTA_PAN_NEXT_STATE 1 /* position of next state */
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#define BTA_PAN_NUM_COLS 2 /* number of columns in state tables */
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/* state table for listen state */
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const UINT8 bta_pan_st_idle[][BTA_PAN_NUM_COLS] =
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{
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/* API_CLOSE */ {BTA_PAN_API_CLOSE, BTA_PAN_IDLE_ST},
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/* CI_TX_READY */ {BTA_PAN_IGNORE, BTA_PAN_IDLE_ST},
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/* CI_RX_READY */ {BTA_PAN_IGNORE, BTA_PAN_IDLE_ST},
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/* CI_TX_FLOW */ {BTA_PAN_IGNORE, BTA_PAN_IDLE_ST},
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/* CI_RX_WRITE */ {BTA_PAN_IGNORE, BTA_PAN_IDLE_ST},
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/* CI_RX_WRITEBUF */ {BTA_PAN_IGNORE, BTA_PAN_IDLE_ST},
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/* PAN_CONN_OPEN */ {BTA_PAN_CONN_OPEN, BTA_PAN_OPEN_ST},
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/* PAN_CONN_CLOSE */ {BTA_PAN_CONN_OPEN, BTA_PAN_IDLE_ST},
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/* FLOW_ENABLE */ {BTA_PAN_IGNORE, BTA_PAN_IDLE_ST},
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/* BNEP_DATA */ {BTA_PAN_IGNORE, BTA_PAN_IDLE_ST}
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};
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/* state table for open state */
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const UINT8 bta_pan_st_open[][BTA_PAN_NUM_COLS] =
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{
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/* API_CLOSE */ {BTA_PAN_API_CLOSE, BTA_PAN_OPEN_ST},
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/* CI_TX_READY */ {BTA_PAN_TX_PATH, BTA_PAN_OPEN_ST},
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/* CI_RX_READY */ {BTA_PAN_RX_PATH, BTA_PAN_OPEN_ST},
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/* CI_TX_FLOW */ {BTA_PAN_TX_FLOW, BTA_PAN_OPEN_ST},
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/* CI_RX_WRITE */ {BTA_PAN_IGNORE, BTA_PAN_OPEN_ST},
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/* CI_RX_WRITEBUF */ {BTA_PAN_WRITE_BUF, BTA_PAN_OPEN_ST},
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/* PAN_CONN_OPEN */ {BTA_PAN_IGNORE, BTA_PAN_OPEN_ST},
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/* PAN_CONN_CLOSE */ {BTA_PAN_CONN_CLOSE, BTA_PAN_IDLE_ST},
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/* FLOW_ENABLE */ {BTA_PAN_RX_PATH, BTA_PAN_OPEN_ST},
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/* BNEP_DATA */ {BTA_PAN_TX_PATH, BTA_PAN_OPEN_ST}
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};
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/* state table for closing state */
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const UINT8 bta_pan_st_closing[][BTA_PAN_NUM_COLS] =
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{
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/* API_CLOSE */ {BTA_PAN_IGNORE, BTA_PAN_CLOSING_ST},
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/* CI_TX_READY */ {BTA_PAN_TX_PATH, BTA_PAN_CLOSING_ST},
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/* CI_RX_READY */ {BTA_PAN_RX_PATH, BTA_PAN_CLOSING_ST},
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/* CI_TX_FLOW */ {BTA_PAN_TX_FLOW, BTA_PAN_CLOSING_ST},
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/* CI_RX_WRITE */ {BTA_PAN_IGNORE, BTA_PAN_CLOSING_ST},
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/* CI_RX_WRITEBUF */ {BTA_PAN_FREE_BUF, BTA_PAN_CLOSING_ST},
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/* PAN_CONN_OPEN */ {BTA_PAN_IGNORE, BTA_PAN_CLOSING_ST},
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/* PAN_CONN_CLOSE */ {BTA_PAN_CONN_CLOSE, BTA_PAN_IDLE_ST},
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/* FLOW_ENABLE */ {BTA_PAN_RX_PATH, BTA_PAN_CLOSING_ST},
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/* BNEP_DATA */ {BTA_PAN_TX_PATH, BTA_PAN_CLOSING_ST}
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};
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/* type for state table */
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typedef const UINT8 (*tBTA_PAN_ST_TBL)[BTA_PAN_NUM_COLS];
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/* state table */
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const tBTA_PAN_ST_TBL bta_pan_st_tbl[] = {
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bta_pan_st_idle,
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bta_pan_st_open,
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bta_pan_st_closing
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};
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/*****************************************************************************
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** Global data
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*****************************************************************************/
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/* PAN control block */
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#if BTA_DYNAMIC_MEMORY == FALSE
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tBTA_PAN_CB bta_pan_cb;
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#endif
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/*******************************************************************************
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**
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** Function bta_pan_scb_alloc
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**
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** Description Allocate a PAN server control block.
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**
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**
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** Returns pointer to the scb, or NULL if none could be allocated.
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**
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*******************************************************************************/
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tBTA_PAN_SCB *bta_pan_scb_alloc(void)
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{
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tBTA_PAN_SCB *p_scb = &bta_pan_cb.scb[0];
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int i;
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for (i = 0; i < BTA_PAN_NUM_CONN; i++, p_scb++)
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{
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if (!p_scb->in_use)
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{
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p_scb->in_use = TRUE;
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APPL_TRACE_DEBUG("bta_pan_scb_alloc %d", i);
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break;
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}
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}
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if (i == BTA_PAN_NUM_CONN)
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{
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/* out of scbs */
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p_scb = NULL;
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APPL_TRACE_WARNING("Out of scbs");
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}
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return p_scb;
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}
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/*******************************************************************************
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**
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** Function bta_pan_sm_execute
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**
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** Description State machine event handling function for PAN
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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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static void bta_pan_sm_execute(tBTA_PAN_SCB *p_scb, UINT16 event, tBTA_PAN_DATA *p_data)
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{
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tBTA_PAN_ST_TBL state_table;
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UINT8 action;
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int i;
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APPL_TRACE_EVENT("PAN scb=%d event=0x%x state=%d", bta_pan_scb_to_idx(p_scb), event, p_scb->state);
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/* look up the state table for the current state */
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state_table = bta_pan_st_tbl[p_scb->state];
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event &= 0x00FF;
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/* set next state */
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p_scb->state = state_table[event][BTA_PAN_NEXT_STATE];
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/* execute action functions */
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for (i = 0; i < BTA_PAN_ACTIONS; i++)
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{
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if ((action = state_table[event][i]) < BTA_PAN_IGNORE)
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{
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(*bta_pan_action[action])(p_scb, p_data);
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}
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else
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{
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APPL_TRACE_EVENT("action: %d", action);
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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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**
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** Function bta_pan_api_enable
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**
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** Description Handle an API enable event.
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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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static void bta_pan_api_enable(tBTA_PAN_DATA *p_data)
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{
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/* initialize control block */
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memset(&bta_pan_cb, 0, sizeof(bta_pan_cb));
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/* store callback function */
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bta_pan_cb.p_cback = p_data->api_enable.p_cback;
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bta_pan_enable(p_data);
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}
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/*******************************************************************************
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**
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** Function bta_pan_api_disable
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**
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** Description Handle an API disable event.
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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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static void bta_pan_api_disable(tBTA_PAN_DATA *p_data)
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{
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UNUSED(p_data);
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bta_pan_disable();
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}
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/*******************************************************************************
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**
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** Function bta_pan_api_open
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**
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** Description Handle an API listen event.
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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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static void bta_pan_api_open(tBTA_PAN_DATA *p_data)
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{
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tBTA_PAN_SCB *p_scb;
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tBTA_PAN_OPEN data;
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/* allocate an scb */
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if ((p_scb = bta_pan_scb_alloc()) != NULL)
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{
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bta_pan_open(p_scb, p_data);
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}
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else
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{
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bdcpy(data.bd_addr, p_data->api_open.bd_addr);
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data.status = BTA_PAN_FAIL;
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bta_pan_cb.p_cback(BTA_PAN_OPEN_EVT, (tBTA_PAN *)&data);
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}
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}
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/*******************************************************************************
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**
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** Function bta_pan_scb_dealloc
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**
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** Description Deallocate a link control block.
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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_pan_scb_dealloc(tBTA_PAN_SCB *p_scb)
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{
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APPL_TRACE_DEBUG("bta_pan_scb_dealloc %d", bta_pan_scb_to_idx(p_scb));
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fixed_queue_free(p_scb->data_queue, NULL);
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memset(p_scb, 0, sizeof(tBTA_PAN_SCB));
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}
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/*******************************************************************************
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**
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** Function bta_pan_scb_to_idx
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**
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** Description Given a pointer to an scb, return its index.
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**
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**
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** Returns Index of scb.
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**
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*******************************************************************************/
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UINT8 bta_pan_scb_to_idx(tBTA_PAN_SCB *p_scb)
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{
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return ((UINT8) (p_scb - bta_pan_cb.scb)) + 1;
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}
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/*******************************************************************************
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**
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** Function bta_pan_scb_by_handle
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**
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** Description Find scb associated with handle.
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**
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**
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** Returns Pointer to scb or NULL if not found.
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**
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*******************************************************************************/
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tBTA_PAN_SCB *bta_pan_scb_by_handle(UINT16 handle)
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{
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tBTA_PAN_SCB *p_scb = &bta_pan_cb.scb[0];
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UINT8 i;
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for (i = 0; i < BTA_PAN_NUM_CONN; i++, p_scb++)
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{
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if (p_scb->handle == handle)
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{
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return p_scb;;
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}
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}
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APPL_TRACE_WARNING("No scb for handle %d", handle);
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return NULL;
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}
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/*******************************************************************************
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**
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** Function bta_pan_hdl_event
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**
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** Description Data gateway 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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BOOLEAN bta_pan_hdl_event(BT_HDR *p_msg)
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{
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tBTA_PAN_SCB *p_scb;
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BOOLEAN freebuf = TRUE;
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switch (p_msg->event)
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{
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/* handle enable event */
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case BTA_PAN_API_ENABLE_EVT:
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bta_pan_api_enable((tBTA_PAN_DATA *) p_msg);
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break;
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/* handle disable event */
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case BTA_PAN_API_DISABLE_EVT:
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bta_pan_api_disable((tBTA_PAN_DATA *) p_msg);
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break;
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/* handle set role event */
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case BTA_PAN_API_SET_ROLE_EVT:
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bta_pan_set_role((tBTA_PAN_DATA *) p_msg);
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break;
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/* handle open event */
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case BTA_PAN_API_OPEN_EVT:
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bta_pan_api_open((tBTA_PAN_DATA *) p_msg);
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break;
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/* events that require buffer not be released */
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case BTA_PAN_CI_RX_WRITEBUF_EVT:
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freebuf = FALSE;
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if ((p_scb = bta_pan_scb_by_handle(p_msg->layer_specific)) != NULL)
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{
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bta_pan_sm_execute(p_scb, p_msg->event, (tBTA_PAN_DATA *) p_msg);
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}
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break;
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/* all other events */
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default:
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if ((p_scb = bta_pan_scb_by_handle(p_msg->layer_specific)) != NULL)
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{
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bta_pan_sm_execute(p_scb, p_msg->event, (tBTA_PAN_DATA *) p_msg);
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}
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break;
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}
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return freebuf;
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}
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#endif /* BTA_PAN_INCLUDED */
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