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/******************************************************************************
*
* 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 module contains functions which operate on the AVCTP connection
* control block.
*
******************************************************************************/
#include <string.h>
#include "stack/bt_types.h"
#include "common/bt_target.h"
#include "stack/avct_api.h"
#include "avct_int.h"
#if (defined(AVCT_INCLUDED) && AVCT_INCLUDED == TRUE)
/*******************************************************************************
**
** Function avct_ccb_alloc
**
** Description Allocate a connection control block; copy parameters to ccb.
**
**
** Returns pointer to the ccb, or NULL if none could be allocated.
**
*******************************************************************************/
tAVCT_CCB *avct_ccb_alloc(tAVCT_CC *p_cc)
{
tAVCT_CCB *p_ccb = &avct_cb.ccb[0];
int i;
for (i = 0; i < AVCT_NUM_CONN; i++, p_ccb++) {
if (!p_ccb->allocated) {
p_ccb->allocated = AVCT_ALOC_LCB;
memcpy(&p_ccb->cc, p_cc, sizeof(tAVCT_CC));
AVCT_TRACE_DEBUG("avct_ccb_alloc %d", i);
break;
}
}
if (i == AVCT_NUM_CONN) {
/* out of ccbs */
p_ccb = NULL;
AVCT_TRACE_WARNING("Out of ccbs");
}
return p_ccb;
}
/*******************************************************************************
**
** Function avct_ccb_dealloc
**
** Description Deallocate a connection control block and call application
** callback.
**
**
** Returns void.
**
*******************************************************************************/
void avct_ccb_dealloc(tAVCT_CCB *p_ccb, UINT8 event, UINT16 result, BD_ADDR bd_addr)
{
tAVCT_CTRL_CBACK *p_cback = p_ccb->cc.p_ctrl_cback;
AVCT_TRACE_DEBUG("avct_ccb_dealloc %d", avct_ccb_to_idx(p_ccb));
#if (AVCT_BROWSE_INCLUDED == TRUE)
if (p_ccb->p_bcb == NULL) {
memset(p_ccb, 0, sizeof(tAVCT_CCB));
} else {
/* control channel is down, but the browsing channel is still connected 0 disconnect it now */
avct_bcb_event(p_ccb->p_bcb, AVCT_LCB_UL_UNBIND_EVT, (tAVCT_LCB_EVT *) &p_ccb);
p_ccb->p_lcb = NULL;
}
#else
memset(p_ccb, 0, sizeof(tAVCT_CCB));
#endif
if (event != AVCT_NO_EVT) {
(*p_cback)(avct_ccb_to_idx(p_ccb), event, result, bd_addr);
}
}
/*******************************************************************************
**
** Function avct_ccb_to_idx
**
** Description Given a pointer to an ccb, return its index.
**
**
** Returns Index of ccb.
**
*******************************************************************************/
UINT8 avct_ccb_to_idx(tAVCT_CCB *p_ccb)
{
/* use array arithmetic to determine index */
return (UINT8) (p_ccb - avct_cb.ccb);
}
/*******************************************************************************
**
** Function avct_ccb_by_idx
**
** Description Return ccb pointer based on ccb index (or handle).
**
**
** Returns pointer to the ccb, or NULL if none found.
**
*******************************************************************************/
tAVCT_CCB *avct_ccb_by_idx(UINT8 idx)
{
tAVCT_CCB *p_ccb;
/* verify index */
if (idx < AVCT_NUM_CONN) {
p_ccb = &avct_cb.ccb[idx];
/* verify ccb is allocated */
if (!p_ccb->allocated) {
p_ccb = NULL;
AVCT_TRACE_WARNING("ccb %d not allocated", idx);
}
} else {
p_ccb = NULL;
AVCT_TRACE_WARNING("No ccb for idx %d", idx);
}
return p_ccb;
}
#endif /* #if (defined(AVCT_INCLUDED) && AVCT_INCLUDED == TRUE) */
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