bta/ag/bta_ag_rfc.cc

/******************************************************************************
 *
 *  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 audio gateway functions controlling the RFCOMM
 *  connections.
 *
 ******************************************************************************/

#include <string.h>

#include "bt_common.h"
#include "bta_ag_api.h"
#include "bta_ag_co.h"
#include "bta_ag_int.h"
#include "bta_api.h"
#include "bta_sys.h"
#include "btm_api.h"
#include "osi/include/osi.h"
#include "port_api.h"
#include "rfcdefs.h"
#include "utl.h"

/* Event mask for RfCOMM port callback */
#define BTA_AG_PORT_EV_MASK PORT_EV_RXCHAR

/* each scb has its own rfcomm callbacks */
void bta_ag_port_cback_1(uint32_t code, uint16_t port_handle);
void bta_ag_port_cback_2(uint32_t code, uint16_t port_handle);
void bta_ag_port_cback_3(uint32_t code, uint16_t port_handle);

void bta_ag_mgmt_cback_1(uint32_t code, uint16_t port_handle);
void bta_ag_mgmt_cback_2(uint32_t code, uint16_t port_handle);
void bta_ag_mgmt_cback_3(uint32_t code, uint16_t port_handle);

int bta_ag_data_cback_1(uint16_t port_handle, void* p_data, uint16_t len);
int bta_ag_data_cback_2(uint16_t port_handle, void* p_data, uint16_t len);
int bta_ag_data_cback_3(uint16_t port_handle, void* p_data, uint16_t len);

/* rfcomm callback function tables */
typedef tPORT_CALLBACK* tBTA_AG_PORT_CBACK;
const tBTA_AG_PORT_CBACK bta_ag_port_cback_tbl[] = {
    bta_ag_port_cback_1, bta_ag_port_cback_2, bta_ag_port_cback_3};

const tBTA_AG_PORT_CBACK bta_ag_mgmt_cback_tbl[] = {
    bta_ag_mgmt_cback_1, bta_ag_mgmt_cback_2, bta_ag_mgmt_cback_3};

typedef tPORT_DATA_CALLBACK* tBTA_AG_DATA_CBACK;
const tBTA_AG_DATA_CBACK bta_ag_data_cback_tbl[] = {
    bta_ag_data_cback_1, bta_ag_data_cback_2, bta_ag_data_cback_3};

/*******************************************************************************
 *
 * Function         bta_ag_port_cback
 *
 * Description      RFCOMM Port callback
 *
 *
 * Returns          void
 *
 ******************************************************************************/
static void bta_ag_port_cback(UNUSED_ATTR uint32_t code, uint16_t port_handle,
                              uint16_t handle) {
  tBTA_AG_SCB* p_scb;

  p_scb = bta_ag_scb_by_idx(handle);
  if (p_scb != NULL) {
    /* ignore port events for port handles other than connected handle */
    if (port_handle != p_scb->conn_handle) {
      APPL_TRACE_DEBUG(
          "ag_port_cback ignoring handle:%d conn_handle = %d other handle = %d",
          port_handle, p_scb->conn_handle, handle);
      return;
    }

    BT_HDR* p_buf = (BT_HDR*)osi_malloc(sizeof(BT_HDR));
    p_buf->event = BTA_AG_RFC_DATA_EVT;
    p_buf->layer_specific = handle;
    bta_sys_sendmsg(p_buf);
  }
}

/*******************************************************************************
 *
 * Function         bta_ag_mgmt_cback
 *
 * Description      RFCOMM management callback
 *
 *
 * Returns          void
 *
 ******************************************************************************/
static void bta_ag_mgmt_cback(uint32_t code, uint16_t port_handle,
                              uint16_t handle) {
  tBTA_AG_SCB* p_scb;
  uint16_t event;
  uint8_t i;
  bool found_handle = false;

  APPL_TRACE_DEBUG("ag_mgmt_cback : code = %d, port_handle = %d, handle = %d",
                   code, port_handle, handle);

  p_scb = bta_ag_scb_by_idx(handle);
  if (p_scb != NULL) {
    /* ignore close event for port handles other than connected handle */
    if ((code != PORT_SUCCESS) && (port_handle != p_scb->conn_handle)) {
      APPL_TRACE_DEBUG("ag_mgmt_cback ignoring handle:%d", port_handle);
      return;
    }

    if (code == PORT_SUCCESS) {
      if (p_scb->conn_handle) /* Outgoing connection */
      {
        if (port_handle == p_scb->conn_handle) found_handle = true;
      } else /* Incoming connection */
      {
        for (i = 0; i < BTA_AG_NUM_IDX; i++) {
          if (port_handle == p_scb->serv_handle[i]) found_handle = true;
        }
      }

      if (!found_handle) {
        APPL_TRACE_ERROR(
            "bta_ag_mgmt_cback: PORT_SUCCESS, ignoring handle = %d",
            port_handle);
        return;
      }

      event = BTA_AG_RFC_OPEN_EVT;
    }
    /* distinguish server close events */
    else if (port_handle == p_scb->conn_handle) {
      event = BTA_AG_RFC_CLOSE_EVT;
    } else {
      event = BTA_AG_RFC_SRV_CLOSE_EVT;
    }

    tBTA_AG_RFC* p_buf = (tBTA_AG_RFC*)osi_malloc(sizeof(tBTA_AG_RFC));
    p_buf->hdr.event = event;
    p_buf->hdr.layer_specific = handle;
    p_buf->port_handle = port_handle;
    bta_sys_sendmsg(p_buf);
  }
}

/*******************************************************************************
 *
 * Function         bta_ag_data_cback
 *
 * Description      RFCOMM data callback
 *
 *
 * Returns          void
 *
 ******************************************************************************/
static int bta_ag_data_cback(UNUSED_ATTR uint16_t port_handle, void* p_data,
                             uint16_t len, uint16_t handle) {
  /* call data call-out directly */
  bta_ag_co_tx_write(handle, (uint8_t*)p_data, len);
  return 0;
}

/*******************************************************************************
 *
 * Function         bta_ag_port_cback_1 to 3
 *                  bta_ag_mgmt_cback_1 to 3
 *
 * Description      RFCOMM callback functions.  This is an easy way to
 *                  distinguish scb from the callback.
 *
 *
 * Returns          void
 *
 ******************************************************************************/
void bta_ag_mgmt_cback_1(uint32_t code, uint16_t handle) {
  bta_ag_mgmt_cback(code, handle, 1);
}
void bta_ag_mgmt_cback_2(uint32_t code, uint16_t handle) {
  bta_ag_mgmt_cback(code, handle, 2);
}
void bta_ag_mgmt_cback_3(uint32_t code, uint16_t handle) {
  bta_ag_mgmt_cback(code, handle, 3);
}
void bta_ag_port_cback_1(uint32_t code, uint16_t handle) {
  bta_ag_port_cback(code, handle, 1);
}
void bta_ag_port_cback_2(uint32_t code, uint16_t handle) {
  bta_ag_port_cback(code, handle, 2);
}
void bta_ag_port_cback_3(uint32_t code, uint16_t handle) {
  bta_ag_port_cback(code, handle, 3);
}

/*******************************************************************************
 *
 * Function         bta_ag_data_cback_1 to 3
 *
 * Description      RFCOMM data callback functions.  This is an easy way to
 *                  distinguish scb from the callback.
 *
 *
 * Returns          void
 *
 ******************************************************************************/
int bta_ag_data_cback_1(uint16_t port_handle, void* p_data, uint16_t len) {
  return bta_ag_data_cback(port_handle, p_data, len, 1);
}
int bta_ag_data_cback_2(uint16_t port_handle, void* p_data, uint16_t len) {
  return bta_ag_data_cback(port_handle, p_data, len, 2);
}
int bta_ag_data_cback_3(uint16_t port_handle, void* p_data, uint16_t len) {
  return bta_ag_data_cback(port_handle, p_data, len, 3);
}

/*******************************************************************************
 *
 * Function         bta_ag_setup_port
 *
 * Description      Setup RFCOMM port for use by AG.
 *
 *
 * Returns          void
 *
 ******************************************************************************/
void bta_ag_setup_port(tBTA_AG_SCB* p_scb, uint16_t handle) {
  uint16_t i = bta_ag_scb_to_idx(p_scb) - 1;

  /* set up data callback if using pass through mode */
  if (bta_ag_cb.parse_mode == BTA_AG_PASS_THROUGH) {
    PORT_SetDataCallback(handle, bta_ag_data_cback_tbl[i]);
  }

  PORT_SetEventMask(handle, BTA_AG_PORT_EV_MASK);
  PORT_SetEventCallback(handle, bta_ag_port_cback_tbl[i]);
}

/*******************************************************************************
 *
 * Function         bta_ag_start_servers
 *
 * Description      Setup RFCOMM servers for use by AG.
 *
 *
 * Returns          void
 *
 ******************************************************************************/
void bta_ag_start_servers(tBTA_AG_SCB* p_scb, tBTA_SERVICE_MASK services) {
  int i;
  int bta_ag_port_status;

  services >>= BTA_HSP_SERVICE_ID;
  for (i = 0; i < BTA_AG_NUM_IDX && services != 0; i++, services >>= 1) {
    /* if service is set in mask */
    if (services & 1) {
      BTM_SetSecurityLevel(false, "", bta_ag_sec_id[i], p_scb->serv_sec_mask,
                           BT_PSM_RFCOMM, BTM_SEC_PROTO_RFCOMM,
                           bta_ag_cb.profile[i].scn);

      bta_ag_port_status = RFCOMM_CreateConnection(
          bta_ag_uuid[i], bta_ag_cb.profile[i].scn, true, BTA_AG_MTU,
          (uint8_t*)bd_addr_any, &(p_scb->serv_handle[i]),
          bta_ag_mgmt_cback_tbl[bta_ag_scb_to_idx(p_scb) - 1]);

      if (bta_ag_port_status == PORT_SUCCESS) {
        bta_ag_setup_port(p_scb, p_scb->serv_handle[i]);
      } else {
        /* TODO: CR#137125 to handle to error properly */
        APPL_TRACE_DEBUG(
            "bta_ag_start_servers: RFCOMM_CreateConnection returned error:%d",
            bta_ag_port_status);
      }
    }
  }
}

/*******************************************************************************
 *
 * Function         bta_ag_close_servers
 *
 * Description      Close RFCOMM servers port for use by AG.
 *
 *
 * Returns          void
 *
 ******************************************************************************/
void bta_ag_close_servers(tBTA_AG_SCB* p_scb, tBTA_SERVICE_MASK services) {
  int i;

  services >>= BTA_HSP_SERVICE_ID;
  for (i = 0; i < BTA_AG_NUM_IDX && services != 0; i++, services >>= 1) {
    /* if service is set in mask */
    if (services & 1) {
      RFCOMM_RemoveServer(p_scb->serv_handle[i]);
      p_scb->serv_handle[i] = 0;
    }
  }
}

/*******************************************************************************
 *
 * Function         bta_ag_is_server_closed
 *
 * Description      Returns true if all servers are closed.
 *
 *
 * Returns          true if all servers are closed, false otherwise
 *
 ******************************************************************************/
bool bta_ag_is_server_closed(tBTA_AG_SCB* p_scb) {
  uint8_t xx;
  bool is_closed = true;

  for (xx = 0; xx < BTA_AG_NUM_IDX; xx++) {
    if (p_scb->serv_handle[xx] != 0) is_closed = false;
  }

  return is_closed;
}

/*******************************************************************************
 *
 * Function         bta_ag_rfc_do_open
 *
 * Description      Open an RFCOMM connection to the peer device.
 *
 *
 * Returns          void
 *
 ******************************************************************************/
void bta_ag_rfc_do_open(tBTA_AG_SCB* p_scb, tBTA_AG_DATA* p_data) {
  BTM_SetSecurityLevel(true, "", bta_ag_sec_id[p_scb->conn_service],
                       p_scb->cli_sec_mask, BT_PSM_RFCOMM, BTM_SEC_PROTO_RFCOMM,
                       p_scb->peer_scn);

  if (RFCOMM_CreateConnection(
          bta_ag_uuid[p_scb->conn_service], p_scb->peer_scn, false, BTA_AG_MTU,
          p_scb->peer_addr, &(p_scb->conn_handle),
          bta_ag_mgmt_cback_tbl[bta_ag_scb_to_idx(p_scb) - 1]) ==
      PORT_SUCCESS) {
    bta_ag_setup_port(p_scb, p_scb->conn_handle);
    APPL_TRACE_DEBUG("bta_ag_rfc_do_open : conn_handle = %d",
                     p_scb->conn_handle);
  }
  /* RFCOMM create connection failed; send ourselves RFCOMM close event */
  else {
    bta_ag_sm_execute(p_scb, BTA_AG_RFC_CLOSE_EVT, p_data);
  }
}

/*******************************************************************************
 *
 * Function         bta_ag_rfc_do_close
 *
 * Description      Close RFCOMM connection.
 *
 *
 * Returns          void
 *
 ******************************************************************************/
void bta_ag_rfc_do_close(tBTA_AG_SCB* p_scb, UNUSED_ATTR tBTA_AG_DATA* p_data) {
  if (p_scb->conn_handle) {
    RFCOMM_RemoveConnection(p_scb->conn_handle);
  } else {
    /* Close API was called while AG is in Opening state.               */
    /* Need to trigger the state machine to send callback to the app    */
    /* and move back to INIT state.                                     */
    tBTA_AG_RFC* p_buf = (tBTA_AG_RFC*)osi_malloc(sizeof(tBTA_AG_RFC));
    p_buf->hdr.event = BTA_AG_RFC_CLOSE_EVT;
    p_buf->hdr.layer_specific = bta_ag_scb_to_idx(p_scb);
    bta_sys_sendmsg(p_buf);

    /* Cancel SDP if it had been started. */
    /*
    if(p_scb->p_disc_db)
    {
        (void)SDP_CancelServiceSearch (p_scb->p_disc_db);
    }
    */
  }
}