/******************************************************************************
*
* Copyright 2002-2012 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 module contains the channel control block state machine and
* functions which operate on the channel control block.
*
******************************************************************************/
#include <string.h>
#include "avdt_api.h"
#include "avdt_int.h"
#include "avdtc_api.h"
#include "bt_common.h"
#include "bt_target.h"
#include "bt_types.h"
#include "bt_utils.h"
#include "btu.h"
#include "osi/include/osi.h"
/*****************************************************************************
* state machine constants and types
****************************************************************************/
/* verbose state strings for trace */
const char* const avdt_ccb_st_str[] = {"CCB_IDLE_ST", "CCB_OPENING_ST",
"CCB_OPEN_ST", "CCB_CLOSING_ST"};
/* verbose event strings for trace */
const char* const avdt_ccb_evt_str[] = {
"API_DISCOVER_REQ_EVT", "API_GETCAP_REQ_EVT",
"API_START_REQ_EVT", "API_SUSPEND_REQ_EVT",
"API_DISCOVER_RSP_EVT", "API_GETCAP_RSP_EVT",
"API_START_RSP_EVT", "API_SUSPEND_RSP_EVT",
"API_CONNECT_REQ_EVT", "API_DISCONNECT_REQ_EVT",
"MSG_DISCOVER_CMD_EVT", "MSG_GETCAP_CMD_EVT",
"MSG_START_CMD_EVT", "MSG_SUSPEND_CMD_EVT",
"MSG_DISCOVER_RSP_EVT", "MSG_GETCAP_RSP_EVT",
"MSG_START_RSP_EVT", "MSG_SUSPEND_RSP_EVT",
"RCVRSP_EVT", "SENDMSG_EVT",
"RET_TOUT_EVT", "RSP_TOUT_EVT",
"IDLE_TOUT_EVT", "UL_OPEN_EVT",
"UL_CLOSE_EVT", "LL_OPEN_EVT",
"LL_CLOSE_EVT", "LL_CONG_EVT"};
/* action function list */
const tAVDT_CCB_ACTION avdt_ccb_action[] = {
avdt_ccb_chan_open, avdt_ccb_chan_close,
avdt_ccb_chk_close, avdt_ccb_hdl_discover_cmd,
avdt_ccb_hdl_discover_rsp, avdt_ccb_hdl_getcap_cmd,
avdt_ccb_hdl_getcap_rsp, avdt_ccb_hdl_start_cmd,
avdt_ccb_hdl_start_rsp, avdt_ccb_hdl_suspend_cmd,
avdt_ccb_hdl_suspend_rsp, avdt_ccb_snd_discover_cmd,
avdt_ccb_snd_discover_rsp, avdt_ccb_snd_getcap_cmd,
avdt_ccb_snd_getcap_rsp, avdt_ccb_snd_start_cmd,
avdt_ccb_snd_start_rsp, avdt_ccb_snd_suspend_cmd,
avdt_ccb_snd_suspend_rsp, avdt_ccb_clear_cmds,
avdt_ccb_cmd_fail, avdt_ccb_free_cmd,
avdt_ccb_cong_state, avdt_ccb_ret_cmd,
avdt_ccb_snd_cmd, avdt_ccb_snd_msg,
avdt_ccb_set_reconn, avdt_ccb_clr_reconn,
avdt_ccb_chk_reconn, avdt_ccb_chk_timer,
avdt_ccb_set_conn, avdt_ccb_set_disconn,
avdt_ccb_do_disconn, avdt_ccb_ll_closed,
avdt_ccb_ll_opened, avdt_ccb_dealloc};
/* state table information */
#define AVDT_CCB_ACTIONS 2 /* number of actions */
#define AVDT_CCB_NEXT_STATE 2 /* position of next state */
#define AVDT_CCB_NUM_COLS 3 /* number of columns in state tables */
/* state table for idle state */
const uint8_t avdt_ccb_st_idle[][AVDT_CCB_NUM_COLS] = {
/* Event */
/* Action 1 Action 2 Next state */
/* API_DISCOVER_REQ_EVT */
{AVDT_CCB_SND_DISCOVER_CMD, AVDT_CCB_CHAN_OPEN, AVDT_CCB_OPENING_ST},
/* API_GETCAP_REQ_EVT */
{AVDT_CCB_SND_GETCAP_CMD, AVDT_CCB_CHAN_OPEN, AVDT_CCB_OPENING_ST},
/* API_START_REQ_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* API_SUSPEND_REQ_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* API_DISCOVER_RSP_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* API_GETCAP_RSP_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* API_START_RSP_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* API_SUSPEND_RSP_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* API_CONNECT_REQ_EVT */
{AVDT_CCB_SET_CONN, AVDT_CCB_CHAN_OPEN, AVDT_CCB_OPENING_ST},
/* API_DISCONNECT_REQ_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* MSG_DISCOVER_CMD_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* MSG_GETCAP_CMD_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* MSG_START_CMD_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* MSG_SUSPEND_CMD_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* MSG_DISCOVER_RSP_EVT */
{AVDT_CCB_HDL_DISCOVER_RSP, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* MSG_GETCAP_RSP_EVT */
{AVDT_CCB_HDL_GETCAP_RSP, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* MSG_START_RSP_EVT */
{AVDT_CCB_HDL_START_RSP, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* MSG_SUSPEND_RSP_EVT */
{AVDT_CCB_HDL_SUSPEND_RSP, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* RCVRSP_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* SENDMSG_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* RET_TOUT_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* RSP_TOUT_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* IDLE_TOUT_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* UL_OPEN_EVT */
{AVDT_CCB_CHAN_OPEN, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* UL_CLOSE_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* LL_OPEN_EVT */
{AVDT_CCB_LL_OPENED, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* LL_CLOSE_EVT */
{AVDT_CCB_LL_CLOSED, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* LL_CONG_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST}};
/* state table for opening state */
const uint8_t avdt_ccb_st_opening[][AVDT_CCB_NUM_COLS] = {
/* Event */
/* Action 1 Action 2 Next state */
/* API_DISCOVER_REQ_EVT */
{AVDT_CCB_SND_DISCOVER_CMD, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* API_GETCAP_REQ_EVT */
{AVDT_CCB_SND_GETCAP_CMD, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* API_START_REQ_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* API_SUSPEND_REQ_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* API_DISCOVER_RSP_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* API_GETCAP_RSP_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* API_START_RSP_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* API_SUSPEND_RSP_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* API_CONNECT_REQ_EVT */
{AVDT_CCB_SET_CONN, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* API_DISCONNECT_REQ_EVT */
{AVDT_CCB_SET_DISCONN, AVDT_CCB_DO_DISCONN, AVDT_CCB_CLOSING_ST},
/* MSG_DISCOVER_CMD_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* MSG_GETCAP_CMD_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* MSG_START_CMD_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* MSG_SUSPEND_CMD_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* MSG_DISCOVER_RSP_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* MSG_GETCAP_RSP_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* MSG_START_RSP_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* MSG_SUSPEND_RSP_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* RCVRSP_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* SENDMSG_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* RET_TOUT_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* RSP_TOUT_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* IDLE_TOUT_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* UL_OPEN_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* UL_CLOSE_EVT */
{AVDT_CCB_CLEAR_CMDS, AVDT_CCB_CHAN_CLOSE, AVDT_CCB_CLOSING_ST},
/* LL_OPEN_EVT */
{AVDT_CCB_SND_CMD, AVDT_CCB_LL_OPENED, AVDT_CCB_OPEN_ST},
/* LL_CLOSE_EVT */
{AVDT_CCB_LL_CLOSED, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* LL_CONG_EVT */
{AVDT_CCB_CONG_STATE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST}};
/* state table for open state */
const uint8_t avdt_ccb_st_open[][AVDT_CCB_NUM_COLS] = {
/* Event */
/* Action 1 Action 2 Next state */
/* API_DISCOVER_REQ_EVT */
{AVDT_CCB_SND_DISCOVER_CMD, AVDT_CCB_SND_CMD, AVDT_CCB_OPEN_ST},
/* API_GETCAP_REQ_EVT */
{AVDT_CCB_SND_GETCAP_CMD, AVDT_CCB_SND_CMD, AVDT_CCB_OPEN_ST},
/* API_START_REQ_EVT */
{AVDT_CCB_SND_START_CMD, AVDT_CCB_SND_CMD, AVDT_CCB_OPEN_ST},
/* API_SUSPEND_REQ_EVT */
{AVDT_CCB_SND_SUSPEND_CMD, AVDT_CCB_SND_CMD, AVDT_CCB_OPEN_ST},
/* API_DISCOVER_RSP_EVT */
{AVDT_CCB_SND_DISCOVER_RSP, AVDT_CCB_SND_CMD, AVDT_CCB_OPEN_ST},
/* API_GETCAP_RSP_EVT */
{AVDT_CCB_SND_GETCAP_RSP, AVDT_CCB_SND_CMD, AVDT_CCB_OPEN_ST},
/* API_START_RSP_EVT */
{AVDT_CCB_SND_START_RSP, AVDT_CCB_SND_CMD, AVDT_CCB_OPEN_ST},
/* API_SUSPEND_RSP_EVT */
{AVDT_CCB_SND_SUSPEND_RSP, AVDT_CCB_SND_CMD, AVDT_CCB_OPEN_ST},
/* API_CONNECT_REQ_EVT */
{AVDT_CCB_SET_CONN, AVDT_CCB_LL_OPENED, AVDT_CCB_OPEN_ST},
/* API_DISCONNECT_REQ_EVT */
{AVDT_CCB_SET_DISCONN, AVDT_CCB_DO_DISCONN, AVDT_CCB_CLOSING_ST},
/* MSG_DISCOVER_CMD_EVT */
{AVDT_CCB_HDL_DISCOVER_CMD, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* MSG_GETCAP_CMD_EVT */
{AVDT_CCB_HDL_GETCAP_CMD, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* MSG_START_CMD_EVT */
{AVDT_CCB_HDL_START_CMD, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* MSG_SUSPEND_CMD_EVT */
{AVDT_CCB_HDL_SUSPEND_CMD, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* MSG_DISCOVER_RSP_EVT */
{AVDT_CCB_CHK_CLOSE, AVDT_CCB_HDL_DISCOVER_RSP, AVDT_CCB_OPEN_ST},
/* MSG_GETCAP_RSP_EVT */
{AVDT_CCB_CHK_CLOSE, AVDT_CCB_HDL_GETCAP_RSP, AVDT_CCB_OPEN_ST},
/* MSG_START_RSP_EVT */
{AVDT_CCB_HDL_START_RSP, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* MSG_SUSPEND_RSP_EVT */
{AVDT_CCB_HDL_SUSPEND_RSP, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* RCVRSP_EVT */
{AVDT_CCB_FREE_CMD, AVDT_CCB_SND_CMD, AVDT_CCB_OPEN_ST},
/* SENDMSG_EVT */
{AVDT_CCB_SND_MSG, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* RET_TOUT_EVT */
{AVDT_CCB_RET_CMD, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* RSP_TOUT_EVT */
{AVDT_CCB_CMD_FAIL, AVDT_CCB_SND_CMD, AVDT_CCB_OPEN_ST},
/* IDLE_TOUT_EVT */
{AVDT_CCB_CLEAR_CMDS, AVDT_CCB_CHAN_CLOSE, AVDT_CCB_CLOSING_ST},
/* UL_OPEN_EVT */
{AVDT_CCB_CHK_TIMER, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* UL_CLOSE_EVT */
{AVDT_CCB_CHK_CLOSE, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* LL_OPEN_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* LL_CLOSE_EVT */
{AVDT_CCB_LL_CLOSED, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* LL_CONG_EVT */
{AVDT_CCB_CONG_STATE, AVDT_CCB_SND_MSG, AVDT_CCB_OPEN_ST}};
/* state table for closing state */
const uint8_t avdt_ccb_st_closing[][AVDT_CCB_NUM_COLS] = {
/* Event */
/* Action 1 Action 2 Next state */
/* API_DISCOVER_REQ_EVT */
{AVDT_CCB_SET_RECONN, AVDT_CCB_SND_DISCOVER_CMD, AVDT_CCB_CLOSING_ST},
/* API_GETCAP_REQ_EVT */
{AVDT_CCB_SET_RECONN, AVDT_CCB_SND_GETCAP_CMD, AVDT_CCB_CLOSING_ST},
/* API_START_REQ_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* API_SUSPEND_REQ_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* API_DISCOVER_RSP_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* API_GETCAP_RSP_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* API_START_RSP_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* API_SUSPEND_RSP_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* API_CONNECT_REQ_EVT */
{AVDT_CCB_SET_RECONN, AVDT_CCB_SET_CONN, AVDT_CCB_CLOSING_ST},
/* API_DISCONNECT_REQ_EVT */
{AVDT_CCB_CLR_RECONN, AVDT_CCB_SET_DISCONN, AVDT_CCB_CLOSING_ST},
/* MSG_DISCOVER_CMD_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* MSG_GETCAP_CMD_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* MSG_START_CMD_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* MSG_SUSPEND_CMD_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* MSG_DISCOVER_RSP_EVT */
{AVDT_CCB_HDL_DISCOVER_RSP, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* MSG_GETCAP_RSP_EVT */
{AVDT_CCB_HDL_GETCAP_RSP, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* MSG_START_RSP_EVT */
{AVDT_CCB_HDL_START_RSP, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* MSG_SUSPEND_RSP_EVT */
{AVDT_CCB_HDL_SUSPEND_RSP, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* RCVRSP_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* SENDMSG_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* RET_TOUT_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* RSP_TOUT_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* IDLE_TOUT_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* UL_OPEN_EVT */
{AVDT_CCB_SET_RECONN, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* UL_CLOSE_EVT */
{AVDT_CCB_CLR_RECONN, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* LL_OPEN_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* LL_CLOSE_EVT */
{AVDT_CCB_CHK_RECONN, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* LL_CONG_EVT */
{AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST}};
/* type for state table */
typedef const uint8_t (*tAVDT_CCB_ST_TBL)[AVDT_CCB_NUM_COLS];
/* state table */
const tAVDT_CCB_ST_TBL avdt_ccb_st_tbl[] = {
avdt_ccb_st_idle, avdt_ccb_st_opening, avdt_ccb_st_open,
avdt_ccb_st_closing};
/*******************************************************************************
*
* Function avdt_ccb_init
*
* Description Initialize channel control block module.
*
*
* Returns Nothing.
*
******************************************************************************/
void avdt_ccb_init(void) {
for (size_t i = 0; i < AVDT_NUM_LINKS; i++) {
avdtp_cb.ccb[i].Reset(i);
}
avdtp_cb.p_ccb_act = avdt_ccb_action;
}
/*******************************************************************************
*
* Function avdt_ccb_event
*
* Description State machine event handling function for ccb
*
*
* Returns Nothing.
*
******************************************************************************/
void avdt_ccb_event(AvdtpCcb* p_ccb, uint8_t event, tAVDT_CCB_EVT* p_data) {
tAVDT_CCB_ST_TBL state_table;
uint8_t action;
int i;
#if (AVDT_DEBUG == TRUE)
AVDT_TRACE_EVENT("%s: CCB ccb=%d event=%s state=%s p_ccb=%p", __func__,
avdt_ccb_to_idx(p_ccb), avdt_ccb_evt_str[event],
avdt_ccb_st_str[p_ccb->state], p_ccb);
#endif
/* look up the state table for the current state */
state_table = avdt_ccb_st_tbl[p_ccb->state];
/* set next state */
if (p_ccb->state != state_table[event][AVDT_CCB_NEXT_STATE]) {
p_ccb->state = state_table[event][AVDT_CCB_NEXT_STATE];
}
/* execute action functions */
for (i = 0; i < AVDT_CCB_ACTIONS; i++) {
action = state_table[event][i];
AVDT_TRACE_DEBUG("%s: event=%s state=%s action=%d", __func__,
avdt_ccb_evt_str[event], avdt_ccb_st_str[p_ccb->state],
action);
if (action != AVDT_CCB_IGNORE) {
(*avdtp_cb.p_ccb_act[action])(p_ccb, p_data);
} else {
break;
}
}
}
/*******************************************************************************
*
* Function avdt_ccb_by_bd
*
* Description This lookup function finds the ccb for a BD address.
*
*
* Returns pointer to the ccb, or NULL if none found.
*
******************************************************************************/
AvdtpCcb* avdt_ccb_by_bd(const RawAddress& bd_addr) {
AvdtpCcb* p_ccb = &avdtp_cb.ccb[0];
int i;
for (i = 0; i < AVDT_NUM_LINKS; i++, p_ccb++) {
/* if allocated ccb has matching ccb */
if (p_ccb->allocated && p_ccb->peer_addr == bd_addr) {
break;
}
}
if (i == AVDT_NUM_LINKS) {
/* if no ccb found */
p_ccb = NULL;
VLOG(1) << "No ccb for addr " << bd_addr;
}
return p_ccb;
}
/*******************************************************************************
*
* Function avdt_ccb_alloc
*
* Description Allocate a channel control block.
*
*
* Returns pointer to the ccb, or NULL if none could be allocated.
*
******************************************************************************/
AvdtpCcb* avdt_ccb_alloc(const RawAddress& bd_addr) {
// Find available entry
AvdtpCcb* p_ccb = &avdtp_cb.ccb[0];
for (int i = 0; i < AVDT_NUM_LINKS; i++, p_ccb++) {
if (!p_ccb->allocated) {
p_ccb->Allocate(bd_addr);
AVDT_TRACE_DEBUG("%s: allocated (index %d) for peer %s", __func__, i,
bd_addr.ToString().c_str());
return p_ccb;
}
}
AVDT_TRACE_WARNING("%s: out of AvdtpCcb entries", __func__);
return nullptr;
}
AvdtpCcb* avdt_ccb_alloc_by_channel_index(const RawAddress& bd_addr,
uint8_t channel_index) {
// Allocate the entry for the specified channel index
if (channel_index >= AVDT_NUM_LINKS) {
AVDT_TRACE_ERROR("%s: peer %s invalid channel index %d (max %d)", __func__,
bd_addr.ToString().c_str(), channel_index, AVDT_NUM_LINKS);
return nullptr;
}
AvdtpCcb* p_ccb = &avdtp_cb.ccb[channel_index];
if (p_ccb->allocated) {
AVDT_TRACE_ERROR("%s: peer %s channel index %d already allocated", __func__,
bd_addr.ToString().c_str(), channel_index);
return nullptr;
}
p_ccb->Allocate(bd_addr);
AVDT_TRACE_DEBUG("%s: allocated (index %d) peer=%s p_ccb=%p", __func__,
channel_index, p_ccb->peer_addr.ToString().c_str(), p_ccb);
return p_ccb;
}
void AvdtpCcb::Allocate(const RawAddress& peer_address) {
ResetCcb();
peer_addr = peer_address;
cmd_q = fixed_queue_new(SIZE_MAX);
rsp_q = fixed_queue_new(SIZE_MAX);
idle_ccb_timer = alarm_new("avdtp_ccb.idle_ccb_timer");
ret_ccb_timer = alarm_new("avdtp_ccb.ret_ccb_timer");
rsp_ccb_timer = alarm_new("avdtp_ccb.rsp_ccb_timer");
allocated = true;
}
/*******************************************************************************
*
* Function avdt_ccb_dealloc
*
* Description Deallocate a stream control block.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_dealloc(AvdtpCcb* p_ccb, UNUSED_ATTR tAVDT_CCB_EVT* p_data) {
AVDT_TRACE_DEBUG("%s: deallocated (index %d) peer=%s p_ccb=%p", __func__,
avdt_ccb_to_idx(p_ccb), p_ccb->peer_addr.ToString().c_str(),
p_ccb);
p_ccb->ResetCcb();
}
/*******************************************************************************
*
* Function avdt_ccb_to_idx
*
* Description Given a pointer to an ccb, return its index.
*
*
* Returns Index of ccb.
*
******************************************************************************/
uint8_t avdt_ccb_to_idx(AvdtpCcb* p_ccb) {
/* use array arithmetic to determine index */
return (uint8_t)(p_ccb - avdtp_cb.ccb);
}
/*******************************************************************************
*
* Function avdt_ccb_by_idx
*
* Description Return ccb pointer based on ccb index.
*
*
* Returns pointer to the ccb, or NULL if none found.
*
******************************************************************************/
AvdtpCcb* avdt_ccb_by_idx(uint8_t idx) {
AvdtpCcb* p_ccb;
/* verify index */
if (idx < AVDT_NUM_LINKS) {
p_ccb = &avdtp_cb.ccb[idx];
} else {
p_ccb = NULL;
AVDT_TRACE_WARNING("No ccb for idx %d", idx);
}
return p_ccb;
}