nfa/ee/nfa_ee_api.c

/******************************************************************************
 *
 *  Copyright (C) 2010-2014 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.
 *
 ******************************************************************************/

/******************************************************************************
 *
 *  NFA interface to NFCEE - API functions
 *
 ******************************************************************************/
#include "nfa_ee_api.h"
#include <string.h>
#include "nfa_dm_int.h"
#include "nfa_ee_int.h"
#include "nfa_sys_int.h"

/*****************************************************************************
**  APIs
*****************************************************************************/
/*******************************************************************************
**
** Function         NFA_EeDiscover
**
** Description      This function retrieves the NFCEE information from NFCC.
**                  The NFCEE information is reported in NFA_EE_DISCOVER_EVT.
**
**                  This function may be called when a system supports removable
**                  NFCEEs,
**
** Returns          NFA_STATUS_OK if information is retrieved successfully
**                  NFA_STATUS_FAILED If wrong state (retry later)
**                  NFA_STATUS_INVALID_PARAM If bad parameter
**
*******************************************************************************/
tNFA_STATUS NFA_EeDiscover(tNFA_EE_CBACK* p_cback) {
  tNFA_EE_API_DISCOVER* p_msg;
  tNFA_STATUS status = NFA_STATUS_FAILED;

  NFA_TRACE_API0("NFA_EeDiscover()");

  if (nfa_ee_cb.em_state != NFA_EE_EM_STATE_INIT_DONE) {
    NFA_TRACE_ERROR1("NFA_EeDiscover bad em state: %d", nfa_ee_cb.em_state);
    status = NFA_STATUS_FAILED;
  } else if ((nfa_ee_cb.p_ee_disc_cback != NULL) || (p_cback == NULL)) {
    NFA_TRACE_ERROR0("NFA_EeDiscover() in progress or NULL callback function");
    status = NFA_STATUS_INVALID_PARAM;
  } else {
    p_msg = (tNFA_EE_API_DISCOVER*)GKI_getbuf(sizeof(tNFA_EE_API_DISCOVER));
    if (p_msg != NULL) {
      p_msg->hdr.event = NFA_EE_API_DISCOVER_EVT;
      p_msg->p_cback = p_cback;

      nfa_sys_sendmsg(p_msg);

      status = NFA_STATUS_OK;
    }
  }

  return status;
}

/*******************************************************************************
**
** Function         NFA_EeGetInfo
**
** Description      This function retrieves the NFCEE information from NFA.
**                  The actual number of NFCEE is returned in p_num_nfcee
**                  and NFCEE information is returned in p_info
**
** Returns          NFA_STATUS_OK if information is retrieved successfully
**                  NFA_STATUS_FAILED If wrong state (retry later)
**                  NFA_STATUS_INVALID_PARAM If bad parameter
**
*******************************************************************************/
tNFA_STATUS NFA_EeGetInfo(uint8_t* p_num_nfcee, tNFA_EE_INFO* p_info) {
  int xx, ret = nfa_ee_cb.cur_ee;
  tNFA_EE_ECB* p_cb = nfa_ee_cb.ecb;
  uint8_t max_ret;
  uint8_t num_ret = 0;

  NFA_TRACE_DEBUG2("NFA_EeGetInfo em_state:%d cur_ee:%d", nfa_ee_cb.em_state,
                   nfa_ee_cb.cur_ee);
  /* validate parameters */
  if (p_info == NULL || p_num_nfcee == NULL) {
    NFA_TRACE_ERROR0("NFA_EeGetInfo bad parameter");
    return (NFA_STATUS_INVALID_PARAM);
  }
  max_ret = *p_num_nfcee;
  *p_num_nfcee = 0;
  if (nfa_ee_cb.em_state == NFA_EE_EM_STATE_INIT) {
    NFA_TRACE_ERROR1("NFA_EeGetInfo bad em state: %d", nfa_ee_cb.em_state);
    return (NFA_STATUS_FAILED);
  }

  /* compose output */
  for (xx = 0; (xx < ret) && (num_ret < max_ret); xx++, p_cb++) {
    NFA_TRACE_DEBUG4("xx:%d max_ret:%d, num_ret:%d ee_status:0x%x", xx, max_ret,
                     num_ret, p_cb->ee_status);
    if ((p_cb->ee_status & NFA_EE_STATUS_INT_MASK) ||
        (p_cb->ee_status == NFA_EE_STATUS_REMOVED)) {
      continue;
    }
    p_info->ee_handle = NFA_HANDLE_GROUP_EE | (tNFA_HANDLE)p_cb->nfcee_id;
    p_info->ee_status = p_cb->ee_status;
    p_info->num_interface = p_cb->num_interface;
    p_info->num_tlvs = p_cb->num_tlvs;
    memcpy(p_info->ee_interface, p_cb->ee_interface, p_cb->num_interface);
    memcpy(p_info->ee_tlv, p_cb->ee_tlv, p_cb->num_tlvs * sizeof(tNFA_EE_TLV));
    p_info++;
    num_ret++;
  }
  NFA_TRACE_DEBUG1("num_ret:%d", num_ret);
  *p_num_nfcee = num_ret;
  return (NFA_STATUS_OK);
}

/*******************************************************************************
**
** Function         NFA_EeRegister
**
** Description      This function registers a callback function to receive the
**                  events from NFA-EE module.
**
** Returns          NFA_STATUS_OK if successfully initiated
**                  NFA_STATUS_FAILED otherwise
**                  NFA_STATUS_INVALID_PARAM If bad parameter
**
*******************************************************************************/
tNFA_STATUS NFA_EeRegister(tNFA_EE_CBACK* p_cback) {
  tNFA_EE_API_REGISTER* p_msg;
  tNFA_STATUS status = NFA_STATUS_FAILED;

  NFA_TRACE_API0("NFA_EeRegister()");

  if (p_cback == NULL) {
    NFA_TRACE_ERROR0("NFA_EeRegister(): with NULL callback function");
    status = NFA_STATUS_INVALID_PARAM;
  } else {
    p_msg = (tNFA_EE_API_REGISTER*)GKI_getbuf(sizeof(tNFA_EE_API_REGISTER));
    if (p_msg != NULL) {
      p_msg->hdr.event = NFA_EE_API_REGISTER_EVT;
      p_msg->p_cback = p_cback;

      nfa_sys_sendmsg(p_msg);

      status = NFA_STATUS_OK;
    }
  }

  return status;
}

/*******************************************************************************
**
** Function         NFA_EeDeregister
**
** Description      This function de-registers the callback function
**
** Returns          NFA_STATUS_OK if successfully initiated
**                  NFA_STATUS_FAILED otherwise
**                  NFA_STATUS_INVALID_PARAM If bad parameter
**
*******************************************************************************/
tNFA_STATUS NFA_EeDeregister(tNFA_EE_CBACK* p_cback) {
  tNFA_EE_API_DEREGISTER* p_msg;
  tNFA_STATUS status = NFA_STATUS_INVALID_PARAM;
  int index = NFA_EE_MAX_CBACKS;
  int xx;

  for (xx = 0; xx < NFA_EE_MAX_CBACKS; xx++) {
    if (nfa_ee_cb.p_ee_cback[xx] == p_cback) {
      index = xx;
      status = NFA_STATUS_FAILED;
      break;
    }
  }

  NFA_TRACE_API2("NFA_EeDeregister() %d, status:%d", index, status);
  if ((status != NFA_STATUS_INVALID_PARAM) &&
      (p_msg = (tNFA_EE_API_DEREGISTER*)GKI_getbuf(
           sizeof(tNFA_EE_API_DEREGISTER))) != NULL) {
    p_msg->hdr.event = NFA_EE_API_DEREGISTER_EVT;
    p_msg->index = index;

    nfa_sys_sendmsg(p_msg);

    status = NFA_STATUS_OK;
  }

  return status;
}

/*******************************************************************************
**
** Function         NFA_EeModeSet
**
** Description      This function is called to activate
**                  (mode = NFA_EE_MD_ACTIVATE) or deactivate
**                  (mode = NFA_EE_MD_DEACTIVATE) the NFCEE identified by the
**                  given ee_handle. The result of this operation is reported
**                  with the NFA_EE_MODE_SET_EVT.
**
** Returns          NFA_STATUS_OK if successfully initiated
**                  NFA_STATUS_FAILED otherwise
**                  NFA_STATUS_INVALID_PARAM If bad parameter
**
*******************************************************************************/
tNFA_STATUS NFA_EeModeSet(tNFA_HANDLE ee_handle, tNFA_EE_MD mode) {
  tNFA_EE_API_MODE_SET* p_msg;
  tNFA_STATUS status = NFA_STATUS_FAILED;
  tNFA_EE_ECB *p_cb, *p_found = NULL;
  uint32_t xx;
  uint8_t nfcee_id = (ee_handle & 0xFF);

  p_cb = nfa_ee_cb.ecb;
  for (xx = 0; xx < nfa_ee_cb.cur_ee; xx++, p_cb++) {
    if (nfcee_id == p_cb->nfcee_id) {
      p_found = p_cb;
      break;
    }
  }
  NFA_TRACE_API2("NFA_EeModeSet(): handle:<0x%x>, mode:0x%02X", ee_handle,
                 mode);

  if (p_found == NULL) {
    NFA_TRACE_ERROR1("NFA_EeModeSet() invalid NFCEE:0x%04x", ee_handle);
    status = NFA_STATUS_INVALID_PARAM;
  } else {
    p_msg = (tNFA_EE_API_MODE_SET*)GKI_getbuf(sizeof(tNFA_EE_API_MODE_SET));
    if (p_msg != NULL) {
      p_msg->hdr.event = NFA_EE_API_MODE_SET_EVT;
      p_msg->nfcee_id = nfcee_id;
      p_msg->mode = mode;
      p_msg->p_cb = p_found;

      nfa_sys_sendmsg(p_msg);

      status = NFA_STATUS_OK;
    }
  }

  return status;
}

/*******************************************************************************
**
** Function         NFA_EeSetDefaultTechRouting
**
** Description      This function is called to add, change or remove the
**                  default routing based on RF technology in the listen mode
**                  routing table for the given ee_handle. The status of this
**                  operation is reported as the NFA_EE_SET_TECH_CFG_EVT.
**
** Note:            If RF discovery is started,
**                  NFA_StopRfDiscovery()/NFA_RF_DISCOVERY_STOPPED_EVT should
**                  happen before calling this function
**
** Note:            NFA_EeUpdateNow() should be called after last NFA-EE
**                  function to change the listen mode routing is called.
**
** Returns          NFA_STATUS_OK if successfully initiated
**                  NFA_STATUS_FAILED otherwise
**                  NFA_STATUS_INVALID_PARAM If bad parameter
**
*******************************************************************************/
tNFA_STATUS NFA_EeSetDefaultTechRouting(
    tNFA_HANDLE ee_handle, tNFA_TECHNOLOGY_MASK technologies_switch_on,
    tNFA_TECHNOLOGY_MASK technologies_switch_off,
    tNFA_TECHNOLOGY_MASK technologies_battery_off) {
  tNFA_EE_API_SET_TECH_CFG* p_msg;
  tNFA_STATUS status = NFA_STATUS_FAILED;
  uint8_t nfcee_id = (uint8_t)(ee_handle & 0xFF);
  tNFA_EE_ECB* p_cb;

  NFA_TRACE_API4(
      "NFA_EeSetDefaultTechRouting(): "
      "handle:<0x%x>technology_mask:<0x%x>/<0x%x>/<0x%x>",
      ee_handle, technologies_switch_on, technologies_switch_off,
      technologies_battery_off);
  p_cb = nfa_ee_find_ecb(nfcee_id);

  if (p_cb == NULL) {
    NFA_TRACE_ERROR0("Bad ee_handle");
    status = NFA_STATUS_INVALID_PARAM;
  } else {
    p_msg =
        (tNFA_EE_API_SET_TECH_CFG*)GKI_getbuf(sizeof(tNFA_EE_API_SET_TECH_CFG));
    if (p_msg != NULL) {
      p_msg->hdr.event = NFA_EE_API_SET_TECH_CFG_EVT;
      p_msg->nfcee_id = nfcee_id;
      p_msg->p_cb = p_cb;
      p_msg->technologies_switch_on = technologies_switch_on;
      p_msg->technologies_switch_off = technologies_switch_off;
      p_msg->technologies_battery_off = technologies_battery_off;

      nfa_sys_sendmsg(p_msg);

      status = NFA_STATUS_OK;
    }
  }

  return status;
}

/*******************************************************************************
**
** Function         NFA_EeSetDefaultProtoRouting
**
** Description      This function is called to add, change or remove the
**                  default routing based on Protocol in the listen mode routing
**                  table for the given ee_handle. The status of this
**                  operation is reported as the NFA_EE_SET_PROTO_CFG_EVT.
**
** Note:            If RF discovery is started,
**                  NFA_StopRfDiscovery()/NFA_RF_DISCOVERY_STOPPED_EVT should
**                  happen before calling this function
**
** Note:            NFA_EeUpdateNow() should be called after last NFA-EE
**                  function to change the listen mode routing is called.
**
** Returns          NFA_STATUS_OK if successfully initiated
**                  NFA_STATUS_FAILED otherwise
**                  NFA_STATUS_INVALID_PARAM If bad parameter
**
*******************************************************************************/
tNFA_STATUS NFA_EeSetDefaultProtoRouting(
    tNFA_HANDLE ee_handle, tNFA_PROTOCOL_MASK protocols_switch_on,
    tNFA_PROTOCOL_MASK protocols_switch_off,
    tNFA_PROTOCOL_MASK protocols_battery_off) {
  tNFA_EE_API_SET_PROTO_CFG* p_msg;
  tNFA_STATUS status = NFA_STATUS_FAILED;
  uint8_t nfcee_id = (uint8_t)(ee_handle & 0xFF);
  tNFA_EE_ECB* p_cb;

  NFA_TRACE_API4(
      "NFA_EeSetDefaultProtoRouting(): "
      "handle:<0x%x>protocol_mask:<0x%x>/<0x%x>/<0x%x>",
      ee_handle, protocols_switch_on, protocols_switch_off,
      protocols_battery_off);
  p_cb = nfa_ee_find_ecb(nfcee_id);

  if (p_cb == NULL) {
    NFA_TRACE_ERROR0("Bad ee_handle");
    status = NFA_STATUS_INVALID_PARAM;
  } else {
    p_msg = (tNFA_EE_API_SET_PROTO_CFG*)GKI_getbuf(
        sizeof(tNFA_EE_API_SET_PROTO_CFG));
    if (p_msg != NULL) {
      p_msg->hdr.event = NFA_EE_API_SET_PROTO_CFG_EVT;
      p_msg->nfcee_id = nfcee_id;
      p_msg->p_cb = p_cb;
      p_msg->protocols_switch_on = protocols_switch_on;
      p_msg->protocols_switch_off = protocols_switch_off;
      p_msg->protocols_battery_off = protocols_battery_off;

      nfa_sys_sendmsg(p_msg);

      status = NFA_STATUS_OK;
    }
  }

  return status;
}

/*******************************************************************************
**
** Function         NFA_EeAddAidRouting
**
** Description      This function is called to add an AID entry in the
**                  listen mode routing table in NFCC. The status of this
**                  operation is reported as the NFA_EE_ADD_AID_EVT.
**
** Note:            If RF discovery is started,
**                  NFA_StopRfDiscovery()/NFA_RF_DISCOVERY_STOPPED_EVT should
**                  happen before calling this function
**
** Note:            NFA_EeUpdateNow() should be called after last NFA-EE
**                  function to change the listen mode routing is called.
**
** Returns          NFA_STATUS_OK if successfully initiated
**                  NFA_STATUS_FAILED otherwise
**                  NFA_STATUS_INVALID_PARAM If bad parameter
**
*******************************************************************************/
tNFA_STATUS NFA_EeAddAidRouting(tNFA_HANDLE ee_handle, uint8_t aid_len,
                                uint8_t* p_aid, tNFA_EE_PWR_STATE power_state) {
  tNFA_EE_API_ADD_AID* p_msg;
  tNFA_STATUS status = NFA_STATUS_FAILED;
  uint16_t size = sizeof(tNFA_EE_API_ADD_AID) + aid_len;
  uint8_t nfcee_id = (uint8_t)(ee_handle & 0xFF);
  tNFA_EE_ECB* p_cb;

  NFA_TRACE_API1("NFA_EeAddAidRouting(): handle:<0x%x>", ee_handle);
  p_cb = nfa_ee_find_ecb(nfcee_id);

  /* validate parameters - make sure the AID is in valid length range */
  if ((p_cb == NULL) || (aid_len == 0) || (p_aid == NULL) ||
      (aid_len < NFA_MIN_AID_LEN) || (aid_len > NFA_MAX_AID_LEN)) {
    NFA_TRACE_ERROR1("Bad ee_handle or AID (len=%d)", aid_len);
    status = NFA_STATUS_INVALID_PARAM;
  } else {
    p_msg = (tNFA_EE_API_ADD_AID*)GKI_getbuf(size);
    if (p_msg != NULL) {
      NFA_TRACE_DEBUG2("aid:<%02x%02x>", p_aid[0], p_aid[1]);
      p_msg->hdr.event = NFA_EE_API_ADD_AID_EVT;
      p_msg->nfcee_id = nfcee_id;
      p_msg->p_cb = p_cb;
      p_msg->aid_len = aid_len;
      p_msg->power_state = power_state;
      p_msg->p_aid = (uint8_t*)(p_msg + 1);
      memcpy(p_msg->p_aid, p_aid, aid_len);

      nfa_sys_sendmsg(p_msg);

      status = NFA_STATUS_OK;
    }
  }

  return status;
}

/*******************************************************************************
**
** Function         NFA_EeRemoveAidRouting
**
** Description      This function is called to remove the given AID entry from
**                  the listen mode routing table. If the entry configures VS,
**                  it is also removed. The status of this operation is reported
**                  as the NFA_EE_REMOVE_AID_EVT.
**
** Note:            If RF discovery is started,
**                  NFA_StopRfDiscovery()/NFA_RF_DISCOVERY_STOPPED_EVT should
**                  happen before calling this function
**
** Note:            NFA_EeUpdateNow() should be called after last NFA-EE
**                  function to change the listen mode routing is called.
**
** Returns          NFA_STATUS_OK if successfully initiated
**                  NFA_STATUS_FAILED otherwise
**                  NFA_STATUS_INVALID_PARAM If bad parameter
**
*******************************************************************************/
tNFA_STATUS NFA_EeRemoveAidRouting(uint8_t aid_len, uint8_t* p_aid) {
  tNFA_EE_API_REMOVE_AID* p_msg;
  tNFA_STATUS status = NFA_STATUS_FAILED;
  uint16_t size = sizeof(tNFA_EE_API_REMOVE_AID) + aid_len;

  NFA_TRACE_API0("NFA_EeRemoveAidRouting()");
  if ((aid_len == 0) || (p_aid == NULL) || (aid_len > NFA_MAX_AID_LEN)) {
    NFA_TRACE_ERROR0("Bad AID");
    status = NFA_STATUS_INVALID_PARAM;
  } else {
    p_msg = (tNFA_EE_API_REMOVE_AID*)GKI_getbuf(size);
    if (p_msg != NULL) {
      p_msg->hdr.event = NFA_EE_API_REMOVE_AID_EVT;
      p_msg->aid_len = aid_len;
      p_msg->p_aid = (uint8_t*)(p_msg + 1);
      memcpy(p_msg->p_aid, p_aid, aid_len);

      nfa_sys_sendmsg(p_msg);

      status = NFA_STATUS_OK;
    }
  }

  return status;
}

/*******************************************************************************
**
** Function         NFA_EeGetLmrtRemainingSize
**
** Description      This function is called to get remaining size of the
**                  Listen Mode Routing Table.
**                  The remaining size is reported in NFA_EE_REMAINING_SIZE_EVT
**
** Returns          NFA_STATUS_OK if successfully initiated
**                  NFA_STATUS_FAILED otherwise
**
*******************************************************************************/
tNFA_STATUS NFA_EeGetLmrtRemainingSize(void) {
  tNFA_EE_API_LMRT_SIZE* p_msg;
  tNFA_STATUS status = NFA_STATUS_FAILED;

  NFA_TRACE_API0("NFA_EeGetLmrtRemainingSize()");
  p_msg = (tNFA_EE_API_LMRT_SIZE*)GKI_getbuf(sizeof(tNFA_EE_API_LMRT_SIZE));
  if (p_msg != NULL) {
    p_msg->event = NFA_EE_API_LMRT_SIZE_EVT;
    nfa_sys_sendmsg(p_msg);
    status = NFA_STATUS_OK;
  }

  return status;
}

/******************************************************************************
**
** Function         NFA_EeUpdateNow
**
** Description      This function is called to send the current listen mode
**                  routing table and VS configuration to the NFCC (without
**                  waiting for NFA_EE_ROUT_TIMEOUT_VAL).
**
**                  The status of this operation is
**                  reported with the NFA_EE_UPDATED_EVT.
**
** Returns          NFA_STATUS_OK if successfully initiated
**                  NFA_STATUS_SEMANTIC_ERROR is update is currently in progress
**                  NFA_STATUS_FAILED otherwise
**
*******************************************************************************/
tNFA_STATUS NFA_EeUpdateNow(void) {
  NFC_HDR* p_msg;
  tNFA_STATUS status = NFA_STATUS_FAILED;

  NFA_TRACE_API0("NFA_EeUpdateNow()");
  if (nfa_ee_cb.ee_wait_evt & NFA_EE_WAIT_UPDATE_ALL) {
    NFA_TRACE_ERROR0("update in progress");
    status = NFA_STATUS_SEMANTIC_ERROR;
  } else {
    p_msg = (NFC_HDR*)GKI_getbuf(NFC_HDR_SIZE);
    if (p_msg != NULL) {
      p_msg->event = NFA_EE_API_UPDATE_NOW_EVT;

      nfa_sys_sendmsg(p_msg);

      status = NFA_STATUS_OK;
    }
  }

  return status;
}

/*******************************************************************************
**
** Function         NFA_EeConnect
**
** Description      Open connection to an NFCEE attached to the NFCC
**
**                  The status of this operation is
**                  reported with the NFA_EE_CONNECT_EVT.
**
** Returns          NFA_STATUS_OK if successfully initiated
**                  NFA_STATUS_FAILED otherwise
**                  NFA_STATUS_INVALID_PARAM If bad parameter
**
*******************************************************************************/
tNFA_STATUS NFA_EeConnect(tNFA_HANDLE ee_handle, uint8_t ee_interface,
                          tNFA_EE_CBACK* p_cback) {
  tNFA_EE_API_CONNECT* p_msg;
  tNFA_STATUS status = NFA_STATUS_FAILED;
  uint8_t nfcee_id = (uint8_t)(ee_handle & 0xFF);
  tNFA_EE_ECB* p_cb;

  NFA_TRACE_API2("NFA_EeConnect(): handle:<0x%x> ee_interface:0x%x", ee_handle,
                 ee_interface);
  p_cb = nfa_ee_find_ecb(nfcee_id);

  if ((p_cb == NULL) || (p_cback == NULL)) {
    NFA_TRACE_ERROR0("Bad ee_handle or NULL callback function");
    status = NFA_STATUS_INVALID_PARAM;
  } else {
    p_msg = (tNFA_EE_API_CONNECT*)GKI_getbuf(sizeof(tNFA_EE_API_CONNECT));
    if (p_msg != NULL) {
      p_msg->hdr.event = NFA_EE_API_CONNECT_EVT;
      p_msg->nfcee_id = nfcee_id;
      p_msg->p_cb = p_cb;
      p_msg->ee_interface = ee_interface;
      p_msg->p_cback = p_cback;

      nfa_sys_sendmsg(p_msg);

      status = NFA_STATUS_OK;
    }
  }

  return status;
}

/*******************************************************************************
**
** Function         NFA_EeSendData
**
** Description      Send data to the given NFCEE.
**                  This function shall be called after NFA_EE_CONNECT_EVT is
**                  reported and before NFA_EeDisconnect is called on the given
**                  ee_handle.
**
** Returns          NFA_STATUS_OK if successfully initiated
**                  NFA_STATUS_FAILED otherwise
**                  NFA_STATUS_INVALID_PARAM If bad parameter
**
*******************************************************************************/
tNFA_STATUS NFA_EeSendData(tNFA_HANDLE ee_handle, uint16_t data_len,
                           uint8_t* p_data) {
  tNFA_EE_API_SEND_DATA* p_msg;
  tNFA_STATUS status = NFA_STATUS_FAILED;
  uint8_t nfcee_id = (uint8_t)(ee_handle & 0xFF);
  tNFA_EE_ECB* p_cb;

  NFA_TRACE_API1("NFA_EeSendData(): handle:<0x%x>", ee_handle);

  p_cb = nfa_ee_find_ecb(nfcee_id);

  if ((p_cb == NULL) || (p_cb->conn_st != NFA_EE_CONN_ST_CONN) ||
      (p_data == NULL)) {
    NFA_TRACE_ERROR0("Bad ee_handle or NULL data");
    status = NFA_STATUS_INVALID_PARAM;
  } else {
    p_msg = (tNFA_EE_API_SEND_DATA*)GKI_getbuf(
        (uint16_t)(sizeof(tNFA_EE_API_SEND_DATA) + data_len));
    if (p_msg != NULL) {
      p_msg->hdr.event = NFA_EE_API_SEND_DATA_EVT;
      p_msg->nfcee_id = nfcee_id;
      p_msg->p_cb = p_cb;
      p_msg->data_len = data_len;
      p_msg->p_data = (uint8_t*)(p_msg + 1);
      memcpy(p_msg->p_data, p_data, data_len);

      nfa_sys_sendmsg(p_msg);

      status = NFA_STATUS_OK;
    }
  }

  return status;
}

/*******************************************************************************
**
** Function         NFA_EeDisconnect
**
** Description      Disconnect (if a connection is currently open) from an
**                  NFCEE interface. The result of this operation is reported
**                  with the NFA_EE_DISCONNECT_EVT.
**
** Returns          NFA_STATUS_OK if successfully initiated
**                  NFA_STATUS_FAILED otherwise
**                  NFA_STATUS_INVALID_PARAM If bad parameter
**
*******************************************************************************/
tNFA_STATUS NFA_EeDisconnect(tNFA_HANDLE ee_handle) {
  tNFA_EE_API_DISCONNECT* p_msg;
  tNFA_STATUS status = NFA_STATUS_FAILED;
  uint8_t nfcee_id = (uint8_t)(ee_handle & 0xFF);
  tNFA_EE_ECB* p_cb;

  NFA_TRACE_API1("NFA_EeDisconnect(): handle:<0x%x>", ee_handle);
  p_cb = nfa_ee_find_ecb(nfcee_id);

  if ((p_cb == NULL) || (p_cb->conn_st != NFA_EE_CONN_ST_CONN)) {
    NFA_TRACE_ERROR0("NFA_EeDisconnect() Bad ee_handle");
    status = NFA_STATUS_INVALID_PARAM;
  } else {
    p_msg = (tNFA_EE_API_DISCONNECT*)GKI_getbuf(sizeof(tNFA_EE_API_DISCONNECT));
    if (p_msg != NULL) {
      p_msg->hdr.event = NFA_EE_API_DISCONNECT_EVT;
      p_msg->nfcee_id = nfcee_id;
      p_msg->p_cb = p_cb;

      nfa_sys_sendmsg(p_msg);

      status = NFA_STATUS_OK;
    }
  }

  return status;
}