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138 lines
4.1 KiB
138 lines
4.1 KiB
/******************************************************************************
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*
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* Copyright 2003-2012 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 module contains functions which operate on the AVCTP connection
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* control block.
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*
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******************************************************************************/
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#include <string.h>
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#include "avct_api.h"
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#include "avct_int.h"
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#include "bt_target.h"
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#include "bt_types.h"
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/*******************************************************************************
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*
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* Function avct_ccb_alloc
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*
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* Description Allocate a connection control block; copy parameters to ccb.
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*
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*
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* Returns pointer to the ccb, or NULL if none could be allocated.
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*
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******************************************************************************/
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tAVCT_CCB* avct_ccb_alloc(tAVCT_CC* p_cc) {
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tAVCT_CCB* p_ccb = &avct_cb.ccb[0];
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int i;
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for (i = 0; i < AVCT_NUM_CONN; i++, p_ccb++) {
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if (!p_ccb->allocated) {
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p_ccb->allocated = AVCT_ALOC_LCB;
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memcpy(&p_ccb->cc, p_cc, sizeof(tAVCT_CC));
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AVCT_TRACE_DEBUG("avct_ccb_alloc %d", i);
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break;
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}
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}
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if (i == AVCT_NUM_CONN) {
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/* out of ccbs */
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p_ccb = NULL;
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AVCT_TRACE_WARNING("Out of ccbs");
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}
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return p_ccb;
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}
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/*******************************************************************************
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*
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* Function avct_ccb_dealloc
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*
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* Description Deallocate a connection control block and call application
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* callback.
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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 avct_ccb_dealloc(tAVCT_CCB* p_ccb, uint8_t event, uint16_t result,
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const RawAddress* bd_addr) {
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tAVCT_CTRL_CBACK* p_cback = p_ccb->cc.p_ctrl_cback;
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AVCT_TRACE_DEBUG("avct_ccb_dealloc %d", avct_ccb_to_idx(p_ccb));
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if (p_ccb->p_bcb == NULL) {
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memset(p_ccb, 0, sizeof(tAVCT_CCB));
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} else {
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/* control channel is down, but the browsing channel is still connected 0
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* disconnect it now */
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avct_bcb_event(p_ccb->p_bcb, AVCT_LCB_UL_UNBIND_EVT,
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(tAVCT_LCB_EVT*)&p_ccb);
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p_ccb->p_lcb = NULL;
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}
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if (event != AVCT_NO_EVT) {
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(*p_cback)(avct_ccb_to_idx(p_ccb), event, result, bd_addr);
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}
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}
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/*******************************************************************************
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*
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* Function avct_ccb_to_idx
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*
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* Description Given a pointer to an ccb, return its index.
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*
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*
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* Returns Index of ccb.
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*
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******************************************************************************/
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uint8_t avct_ccb_to_idx(tAVCT_CCB* p_ccb) {
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/* use array arithmetic to determine index */
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return (uint8_t)(p_ccb - avct_cb.ccb);
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}
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/*******************************************************************************
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*
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* Function avct_ccb_by_idx
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*
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* Description Return ccb pointer based on ccb index (or handle).
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*
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*
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* Returns pointer to the ccb, or NULL if none found.
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*
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******************************************************************************/
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tAVCT_CCB* avct_ccb_by_idx(uint8_t idx) {
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tAVCT_CCB* p_ccb;
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/* verify index */
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if (idx < AVCT_NUM_CONN) {
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p_ccb = &avct_cb.ccb[idx];
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/* verify ccb is allocated */
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if (!p_ccb->allocated) {
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p_ccb = NULL;
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AVCT_TRACE_WARNING("ccb %d not allocated", idx);
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}
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} else {
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p_ccb = NULL;
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AVCT_TRACE_WARNING("No ccb for idx %d", idx);
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}
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return p_ccb;
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}
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