stack/mcap/mca_dact.cc

/******************************************************************************
 *
 *  Copyright 2009-2012 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 is the implementation file for the MCAP Data Channel Action
 *  Functions.
 *
 ******************************************************************************/

#include <stddef.h>
#include "bt_common.h"
#include "bt_target.h"
#include "bt_utils.h"
#include "mca_api.h"
#include "mca_int.h"
#include "osi/include/osi.h"

/*******************************************************************************
 *
 * Function         mca_dcb_report_cong
 *
 * Description      This function is called to report the congestion flag.
 *
 * Returns          void.
 *
 ******************************************************************************/
void mca_dcb_report_cong(tMCA_DCB* p_dcb) {
  tMCA_CTRL evt_data;

  evt_data.cong_chg.cong = p_dcb->cong;
  evt_data.cong_chg.mdl = mca_dcb_to_hdl(p_dcb);
  evt_data.cong_chg.mdl_id = p_dcb->mdl_id;
  mca_ccb_report_event(p_dcb->p_ccb, MCA_CONG_CHG_EVT, &evt_data);
}

/*******************************************************************************
 *
 * Function         mca_dcb_tc_open
 *
 * Description      This function is called to report MCA_OPEN_IND_EVT or
 *                  MCA_OPEN_CFM_EVT event.
 *                  It also clears the congestion flag (dcb.cong).
 *
 * Returns          void.
 *
 ******************************************************************************/
void mca_dcb_tc_open(tMCA_DCB* p_dcb, tMCA_DCB_EVT* p_data) {
  tMCA_CTRL evt_data;
  tMCA_CCB* p_ccb = p_dcb->p_ccb;
  uint8_t event = MCA_OPEN_IND_EVT;

  if (p_data->open.param == MCA_INT) event = MCA_OPEN_CFM_EVT;
  p_dcb->cong = false;
  evt_data.open_cfm.mtu = p_data->open.peer_mtu;
  evt_data.open_cfm.mdl_id = p_dcb->mdl_id;
  evt_data.open_cfm.mdl = mca_dcb_to_hdl(p_dcb);
  mca_ccb_event(p_ccb, MCA_CCB_DL_OPEN_EVT, NULL);
  mca_ccb_report_event(p_ccb, event, &evt_data);
}

/*******************************************************************************
 *
 * Function         mca_dcb_cong
 *
 * Description      This function sets the congestion state for the DCB.
 *
 * Returns          void.
 *
 ******************************************************************************/
void mca_dcb_cong(tMCA_DCB* p_dcb, tMCA_DCB_EVT* p_data) {
  p_dcb->cong = p_data->llcong;
  mca_dcb_report_cong(p_dcb);
}

/*******************************************************************************
 *
 * Function         mca_dcb_free_data
 *
 * Description      This function frees the received message.
 *
 * Returns          void.
 *
 ******************************************************************************/
void mca_dcb_free_data(UNUSED_ATTR tMCA_DCB* p_dcb, tMCA_DCB_EVT* p_data) {
  osi_free(p_data);
}

/*******************************************************************************
 *
 * Function         mca_dcb_do_disconn
 *
 * Description      This function closes a data channel.
 *
 * Returns          void.
 *
 ******************************************************************************/
void mca_dcb_do_disconn(tMCA_DCB* p_dcb, UNUSED_ATTR tMCA_DCB_EVT* p_data) {
  if ((p_dcb->lcid == 0) || (!L2CA_DisconnectReq(p_dcb->lcid))) {
    tMCA_CLOSE close;
    close.param = MCA_INT;
    close.reason = L2CAP_DISC_OK;
    close.lcid = 0;
    tMCA_DCB_EVT mca_dcb_evt;
    mca_dcb_evt.close = close;
    mca_dcb_event(p_dcb, MCA_DCB_TC_CLOSE_EVT, &mca_dcb_evt);
  }
}

/*******************************************************************************
 *
 * Function         mca_dcb_snd_data
 *
 * Description      Send the data from application to the peer device.
 *
 * Returns          void.
 *
 ******************************************************************************/
void mca_dcb_snd_data(tMCA_DCB* p_dcb, tMCA_DCB_EVT* p_data) {
  uint8_t status;

  /* do not need to check cong, because API already checked the status */
  status = L2CA_DataWrite(p_dcb->lcid, p_data->p_pkt);
  if (status == L2CAP_DW_CONGESTED) {
    p_dcb->cong = true;
    mca_dcb_report_cong(p_dcb);
  }
}

/*******************************************************************************
 *
 * Function         mca_dcb_hdl_data
 *
 * Description      This function reports the received data through the data
 *                  callback function.
 *
 * Returns          void.
 *
 ******************************************************************************/
void mca_dcb_hdl_data(tMCA_DCB* p_dcb, tMCA_DCB_EVT* p_data) {
  (*p_dcb->p_cs->p_data_cback)(mca_dcb_to_hdl(p_dcb), (BT_HDR*)p_data);
}