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