text: /******************************************************************************
   *
   *  Copyright (C) 2010-2012 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 of the API for GATT module of BTA.
   *
   ******************************************************************************/
  
  #include "bt_target.h"
  
  #if defined(BTA_GATT_INCLUDED) && (BTA_GATT_INCLUDED == TRUE)
  
  #include <string.h>
  #include "gki.h"
  #include "bta_sys.h"
  #include "bta_gatt_api.h"
  #include "bta_gattc_int.h"
  
  /*****************************************************************************
  **  Constants
  *****************************************************************************/
  
  static const tBTA_SYS_REG bta_gattc_reg = {
      bta_gattc_hdl_event,
      BTA_GATTC_Disable
  };
  
  
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_Disable
  **
  ** Description      This function is called to disable GATTC module
  **
  ** Parameters       None.
  **
  ** Returns          None
  **
  *******************************************************************************/
  void BTA_GATTC_Disable(void)
  {
      BT_HDR  *p_buf;
  
      if (bta_sys_is_register(BTA_ID_GATTC) == FALSE) {
          APPL_TRACE_WARNING("GATTC Module not enabled/already disabled\n");
          return;
      }
      if ((p_buf = (BT_HDR *) GKI_getbuf(sizeof(BT_HDR))) != NULL) {
          p_buf->event = BTA_GATTC_API_DISABLE_EVT;
          bta_sys_sendmsg(p_buf);
      }
      bta_sys_deregister(BTA_ID_GATTC);
  
  }
  
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_AppRegister
  **
  ** Description      This function is called to register application callbacks
  **                    with BTA GATTC module.
  **
  ** Parameters       p_app_uuid - applicaiton UUID
  **                  p_client_cb - pointer to the application callback function.
  **
  ** Returns          None
  **
  *******************************************************************************/
  void BTA_GATTC_AppRegister(tBT_UUID *p_app_uuid, tBTA_GATTC_CBACK *p_client_cb)
  {
      tBTA_GATTC_API_REG  *p_buf;
  
      if (bta_sys_is_register(BTA_ID_GATTC) == FALSE) {
          bta_sys_register(BTA_ID_GATTC, &bta_gattc_reg);
      }
  
      if ((p_buf = (tBTA_GATTC_API_REG *) GKI_getbuf(sizeof(tBTA_GATTC_API_REG))) != NULL) {
          p_buf->hdr.event    = BTA_GATTC_API_REG_EVT;
          if (p_app_uuid != NULL) {
              memcpy(&p_buf->app_uuid, p_app_uuid, sizeof(tBT_UUID));
          }
          p_buf->p_cback      = p_client_cb;
  
          bta_sys_sendmsg(p_buf);
      }
      return;
  }
  
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_AppDeregister
  **
  ** Description      This function is called to deregister an application
  **                  from BTA GATTC module.
  **
  ** Parameters       client_if - client interface identifier.
  **
  ** Returns          None
  **
  *******************************************************************************/
  void BTA_GATTC_AppDeregister(tBTA_GATTC_IF client_if)
  {
      tBTA_GATTC_API_DEREG  *p_buf;
  
      if ((p_buf = (tBTA_GATTC_API_DEREG *) GKI_getbuf(sizeof(tBTA_GATTC_API_DEREG))) != NULL) {
          p_buf->hdr.event = BTA_GATTC_API_DEREG_EVT;
          p_buf->client_if = client_if;
          bta_sys_sendmsg(p_buf);
      }
      return;
  }
  
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_Open
  **
  ** Description      Open a direct connection or add a background auto connection
  **                  bd address
  **
  ** Parameters       client_if: server interface.
  **                  remote_bda: remote device BD address.
  **                  is_direct: direct connection or background auto connection
  **                  transport: Transport to be used for GATT connection (BREDR/LE)
  **
  ** Returns          void
  **
  *******************************************************************************/
  void BTA_GATTC_Open(tBTA_GATTC_IF client_if, BD_ADDR remote_bda,
                      BOOLEAN is_direct, tBTA_GATT_TRANSPORT transport)
  {
      tBTA_GATTC_API_OPEN  *p_buf;
  
      if ((p_buf = (tBTA_GATTC_API_OPEN *) GKI_getbuf(sizeof(tBTA_GATTC_API_OPEN))) != NULL) {
          p_buf->hdr.event = BTA_GATTC_API_OPEN_EVT;
  
          p_buf->client_if = client_if;
          p_buf->is_direct = is_direct;
          p_buf->transport = transport;
          memcpy(p_buf->remote_bda, remote_bda, BD_ADDR_LEN);
  
  
          bta_sys_sendmsg(p_buf);
      }
      return;
  }
  
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_CancelOpen
  **
  ** Description      Cancel a direct open connection or remove a background auto connection
  **                  bd address
  **
  ** Parameters       client_if: server interface.
  **                  remote_bda: remote device BD address.
  **                  is_direct: direct connection or background auto connection
  **
  ** Returns          void
  **
  *******************************************************************************/
  void BTA_GATTC_CancelOpen(tBTA_GATTC_IF client_if, BD_ADDR remote_bda, BOOLEAN is_direct)
  {
      tBTA_GATTC_API_CANCEL_OPEN  *p_buf;
  
      if ((p_buf = (tBTA_GATTC_API_CANCEL_OPEN *) GKI_getbuf(sizeof(tBTA_GATTC_API_CANCEL_OPEN))) != NULL) {
          p_buf->hdr.event = BTA_GATTC_API_CANCEL_OPEN_EVT;
  
          p_buf->client_if = client_if;
          p_buf->is_direct = is_direct;
          memcpy(p_buf->remote_bda, remote_bda, BD_ADDR_LEN);
  
          bta_sys_sendmsg(p_buf);
      }
      return;
  }
  
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_Close
  **
  ** Description      Close a connection to a GATT server.
  **
  ** Parameters       conn_id: connection ID to be closed.
  **
  ** Returns          void
  **
  *******************************************************************************/
  void BTA_GATTC_Close(UINT16 conn_id)
  {
      BT_HDR  *p_buf;
  
      if ((p_buf = (BT_HDR *) GKI_getbuf(sizeof(BT_HDR))) != NULL) {
          p_buf->event = BTA_GATTC_API_CLOSE_EVT;
  
          p_buf->layer_specific = conn_id;
  
          bta_sys_sendmsg(p_buf);
      }
      return;
  
  }
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_ConfigureMTU
  **
  ** Description      Configure the MTU size in the GATT channel. This can be done
  **                  only once per connection.
  **
  ** Parameters       conn_id: connection ID.
  **                  mtu: desired MTU size to use.
  **
  ** Returns          void
  **
  *******************************************************************************/
  void BTA_GATTC_ConfigureMTU (UINT16 conn_id, UINT16 mtu)
  {
      tBTA_GATTC_API_CFG_MTU  *p_buf;
  
      if ((p_buf = (tBTA_GATTC_API_CFG_MTU *) GKI_getbuf(sizeof(tBTA_GATTC_API_CFG_MTU))) != NULL) {
          p_buf->hdr.event = BTA_GATTC_API_CFG_MTU_EVT;
          p_buf->hdr.layer_specific = conn_id;
  
          p_buf->mtu = mtu;
  
          bta_sys_sendmsg(p_buf);
      }
      return;
  }
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_ServiceSearchRequest
  **
  ** Description      This function is called to request a GATT service discovery
  **                    on a GATT server. This function report service search result
  **                  by a callback event, and followed by a service search complete
  **                  event.
  **
  ** Parameters       conn_id: connection ID.
  **                  p_srvc_uuid: a UUID of the service application is interested in.
  **                              If Null, discover for all services.
  **
  ** Returns          None
  **
  *******************************************************************************/
  void BTA_GATTC_ServiceSearchRequest (UINT16 conn_id, tBT_UUID *p_srvc_uuid)
  {
      tBTA_GATTC_API_SEARCH  *p_buf;
      UINT16  len = sizeof(tBTA_GATTC_API_SEARCH) + sizeof(tBT_UUID);
  
      if ((p_buf = (tBTA_GATTC_API_SEARCH *) GKI_getbuf(len)) != NULL) {
          memset(p_buf, 0, len);
  
          p_buf->hdr.event = BTA_GATTC_API_SEARCH_EVT;
          p_buf->hdr.layer_specific = conn_id;
  
          if (p_srvc_uuid) {
              p_buf->p_srvc_uuid = (tBT_UUID *)(p_buf + 1);
              memcpy(p_buf->p_srvc_uuid, p_srvc_uuid, sizeof(tBT_UUID));
          } else {
              p_buf->p_srvc_uuid = NULL;
          }
  
          bta_sys_sendmsg(p_buf);
      }
      return;
  }
  
  
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_GetFirstChar
  **
  ** Description      This function is called to find the first characteristic of the
  **                  service on the given server.
  **
  ** Parameters       conn_id: connection ID which identify the server.
  **                  p_srvc_id: the service ID of which the characteristic is belonged to.
  **                  p_char_uuid_cond: Characteristic UUID, if NULL find the first available
  **                               characteristic.
  **                  p_char_result: output parameter which will store the GATT
  **                                  characteristic ID.
  **                  p_property: output parameter to carry the characteristic property.
  **
  ** Returns          returns status.
  **
  *******************************************************************************/
  tBTA_GATT_STATUS  BTA_GATTC_GetFirstChar (UINT16 conn_id, tBTA_GATT_SRVC_ID *p_srvc_id,
          tBT_UUID *p_char_uuid_cond,
          tBTA_GATTC_CHAR_ID *p_char_result,
          tBTA_GATT_CHAR_PROP *p_property)
  {
      tBTA_GATT_STATUS    status;
  
      if (!p_srvc_id || !p_char_result) {
          return BTA_GATT_ILLEGAL_PARAMETER;
      }
  
      if ((status = bta_gattc_query_cache(conn_id, BTA_GATTC_ATTR_TYPE_CHAR, p_srvc_id, NULL,
                                          p_char_uuid_cond, &p_char_result->char_id, (void *)p_property))
              == BTA_GATT_OK) {
          memcpy(&p_char_result->srvc_id, p_srvc_id, sizeof(tBTA_GATT_SRVC_ID));
      }
  
      return status;
  
  }
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_GetNextChar
  **
  ** Description      This function is called to find the next characteristic of the
  **                  service on the given server.
  **
  ** Parameters       conn_id: connection ID which identify the server.
  **                  p_start_char_id: start the characteristic search from the next record
  **                           after the one identified by char_id.
  **                  p_char_uuid_cond: Characteristic UUID, if NULL find the first available
  **                               characteristic.
  **                  p_char_result: output parameter which will store the GATT
  **                                  characteristic ID.
  **                  p_property: output parameter to carry the characteristic property.
  **
  ** Returns          returns status.
  **
  *******************************************************************************/
  tBTA_GATT_STATUS  BTA_GATTC_GetNextChar (UINT16 conn_id,
          tBTA_GATTC_CHAR_ID *p_start_char_id,
          tBT_UUID           *p_char_uuid_cond,
          tBTA_GATTC_CHAR_ID *p_char_result,
          tBTA_GATT_CHAR_PROP    *p_property)
  {
      tBTA_GATT_STATUS    status;
  
      if (!p_start_char_id || !p_char_result) {
          return BTA_GATT_ILLEGAL_PARAMETER;
      }
  
      if ((status = bta_gattc_query_cache(conn_id, BTA_GATTC_ATTR_TYPE_CHAR,
                                          &p_start_char_id->srvc_id,
                                          &p_start_char_id->char_id,
                                          p_char_uuid_cond,
                                          &p_char_result->char_id,
                                          (void *) p_property))
              == BTA_GATT_OK) {
          memcpy(&p_char_result->srvc_id, &p_start_char_id->srvc_id, sizeof(tBTA_GATT_SRVC_ID));
      }
  
      return status;
  }
  
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_GetFirstCharDescr
  **
  ** Description      This function is called to find the first characteristic descriptor of the
  **                  characteristic on the given server.
  **
  ** Parameters       conn_id: connection ID which identify the server.
  **                  p_char_id: the characteristic ID of which the descriptor is belonged to.
  **                  p_descr_uuid_cond: Characteristic Descr UUID, if NULL find the first available
  **                               characteristic.
  **                  p_descr_result: output parameter which will store the GATT
  **                                  characteristic descriptor ID.
  **
  ** Returns          returns status.
  **
  *******************************************************************************/
  tBTA_GATT_STATUS  BTA_GATTC_GetFirstCharDescr (UINT16 conn_id, tBTA_GATTC_CHAR_ID *p_char_id,
          tBT_UUID *p_descr_uuid_cond,
          tBTA_GATTC_CHAR_DESCR_ID *p_descr_result)
  {
      tBTA_GATT_STATUS    status;
  
      if (!p_char_id || !p_descr_result) {
          return BTA_GATT_ILLEGAL_PARAMETER;
      }
  
      memset(p_descr_result, 0, sizeof(tBTA_GATTC_CHAR_DESCR_ID));
  
      if ((status = bta_gattc_query_cache(conn_id,
                                          BTA_GATTC_ATTR_TYPE_CHAR_DESCR,
                                          &p_char_id->srvc_id,
                                          &p_char_id->char_id,
                                          p_descr_uuid_cond,
                                          &p_descr_result->char_id.char_id,
                                          NULL))
              == BTA_GATT_OK) {
          memcpy(&p_descr_result->descr_id, &p_descr_result->char_id.char_id, sizeof(tBTA_GATT_ID));
          memcpy(&p_descr_result->char_id, p_char_id, sizeof(tBTA_GATTC_CHAR_ID));
      }
      return status;
  
  }
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_GetNextCharDescr
  **
  ** Description      This function is called to find the next characteristic descriptor
  **                  of the characterisctic.
  **
  ** Parameters       conn_id: connection ID which identify the server.
  **                  p_start_descr_id: start the descriptor search from the next record
  **                           after the one identified by p_start_descr_id.
  **                  p_descr_uuid_cond: Characteristic descriptor UUID, if NULL find
  **                               the first available characteristic descriptor.
  **                  p_descr_result: output parameter which will store the GATT
  **                                  characteristic descriptor ID.
  **
  ** Returns          returns status.
  **
  *******************************************************************************/
  tBTA_GATT_STATUS  BTA_GATTC_GetNextCharDescr (UINT16 conn_id,
          tBTA_GATTC_CHAR_DESCR_ID *p_start_descr_id,
          tBT_UUID           *p_descr_uuid_cond,
          tBTA_GATTC_CHAR_DESCR_ID *p_descr_result)
  {
      tBTA_GATT_STATUS    status;
  
      if (!p_start_descr_id || !p_descr_result) {
          return BTA_GATT_ILLEGAL_PARAMETER;
      }
  
      memset(p_descr_result, 0, sizeof(tBTA_GATTC_CHAR_DESCR_ID));
  
      if ((status = bta_gattc_query_cache(conn_id, BTA_GATTC_ATTR_TYPE_CHAR_DESCR,
                                          &p_start_descr_id->char_id.srvc_id,
                                          &p_start_descr_id->char_id.char_id,
                                          p_descr_uuid_cond,
                                          &p_descr_result->char_id.char_id,
                                          (void *)&p_start_descr_id->descr_id))
              == BTA_GATT_OK) {
          memcpy(&p_descr_result->descr_id, &p_descr_result->char_id.char_id, sizeof(tBTA_GATT_ID));
          memcpy(&p_descr_result->char_id, p_start_descr_id, sizeof(tBTA_GATTC_CHAR_ID));
      }
  
      return status;
  }
  
  
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_GetFirstIncludedService
  **
  ** Description      This function is called to find the first included service of the
  **                  service on the given server.
  **
  ** Parameters       conn_id: connection ID which identify the server.
  **                  p_srvc_id: the service ID of which the characteristic is belonged to.
  **                  p_uuid_cond: Characteristic UUID, if NULL find the first available
  **                               characteristic.
  **                  p_result: output parameter which will store the GATT ID
  **                              of the included service found.
  **
  ** Returns          returns status.
  **
  *******************************************************************************/
  tBTA_GATT_STATUS  BTA_GATTC_GetFirstIncludedService(UINT16 conn_id, tBTA_GATT_SRVC_ID *p_srvc_id,
          tBT_UUID *p_uuid_cond, tBTA_GATTC_INCL_SVC_ID *p_result)
  {
      tBTA_GATT_STATUS    status;
  
      if (!p_srvc_id || !p_result) {
          return BTA_GATT_ILLEGAL_PARAMETER;
      }
  
      if ((status = bta_gattc_query_cache(conn_id,
                                          BTA_GATTC_ATTR_TYPE_INCL_SRVC,
                                          p_srvc_id,
                                          NULL,
                                          p_uuid_cond,
                                          &p_result->incl_svc_id.id,
                                          (void *)&p_result->incl_svc_id.is_primary))
              == BTA_GATT_OK) {
          memcpy(&p_result->srvc_id, p_srvc_id, sizeof(tBTA_GATT_SRVC_ID));
      }
  
      return status;
  }
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_GetNextIncludedService
  **
  ** Description      This function is called to find the next included service of the
  **                  service on the given server.
  **
  ** Parameters       conn_id: connection ID which identify the server.
  **                  p_start_id: start the search from the next record
  **                                  after the one identified by p_start_id.
  **                  p_uuid_cond: Included service UUID, if NULL find the first available
  **                               included service.
  **                  p_result: output parameter which will store the GATT ID
  **                              of the included service found.
  **
  ** Returns          returns status.
  **
  *******************************************************************************/
  tBTA_GATT_STATUS  BTA_GATTC_GetNextIncludedService(UINT16 conn_id,
          tBTA_GATTC_INCL_SVC_ID *p_start_id,
          tBT_UUID               *p_uuid_cond,
          tBTA_GATTC_INCL_SVC_ID *p_result)
  {
      tBTA_GATT_STATUS    status;
  
      if (!p_start_id || !p_result) {
          return BTA_GATT_ILLEGAL_PARAMETER;
      }
  
      if ((status = bta_gattc_query_cache(conn_id,
                                          BTA_GATTC_ATTR_TYPE_INCL_SRVC,
                                          &p_start_id->srvc_id,
                                          &p_start_id->incl_svc_id.id,
                                          p_uuid_cond,
                                          &p_result->incl_svc_id.id,
                                          (void *)&p_result->incl_svc_id.is_primary))
              == BTA_GATT_OK) {
          memcpy(&p_result->srvc_id, &p_start_id->srvc_id, sizeof(tBTA_GATT_SRVC_ID));
      }
  
      return status;
  }
  
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_ReadCharacteristic
  **
  ** Description      This function is called to read a service's characteristics of
  **                    the given characteritisc ID.
  **
  ** Parameters       conn_id - connection ID.
  **                    p_char_id - characteritic ID to read.
  **
  ** Returns          None
  **
  *******************************************************************************/
  void BTA_GATTC_ReadCharacteristic(UINT16 conn_id, tBTA_GATTC_CHAR_ID *p_char_id,
                                    tBTA_GATT_AUTH_REQ auth_req)
  {
      tBTA_GATTC_API_READ  *p_buf;
  
      if ((p_buf = (tBTA_GATTC_API_READ *) GKI_getbuf(sizeof(tBTA_GATTC_API_READ))) != NULL) {
          memset(p_buf, 0, sizeof(tBTA_GATTC_API_READ));
  
          p_buf->hdr.event = BTA_GATTC_API_READ_EVT;
          p_buf->hdr.layer_specific = conn_id;
          p_buf->auth_req = auth_req;
  
          memcpy(&p_buf->srvc_id, &p_char_id->srvc_id, sizeof(tBTA_GATT_SRVC_ID));
          memcpy(&p_buf->char_id, &p_char_id->char_id, sizeof(tBTA_GATT_ID));
          p_buf->p_descr_type = NULL;
  
          bta_sys_sendmsg(p_buf);
      }
      return;
  }
  
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_ReadCharDescr
  **
  ** Description      This function is called to read a characteristics descriptor.
  **
  ** Parameters       conn_id - connection ID.
  **                    p_char_descr_id - characteritic descriptor ID to read.
  **
  ** Returns          None
  **
  *******************************************************************************/
  void BTA_GATTC_ReadCharDescr (UINT16 conn_id,
                                tBTA_GATTC_CHAR_DESCR_ID  *p_descr_id,
                                tBTA_GATT_AUTH_REQ auth_req)
  {
      tBTA_GATTC_API_READ  *p_buf;
      UINT16  len = (UINT16)(sizeof(tBTA_GATT_ID) + sizeof(tBTA_GATTC_API_READ));
  
      if ((p_buf = (tBTA_GATTC_API_READ *) GKI_getbuf(len)) != NULL) {
          memset(p_buf, 0, sizeof(tBTA_GATTC_API_READ));
  
          p_buf->hdr.event = BTA_GATTC_API_READ_EVT;
          p_buf->hdr.layer_specific = conn_id;
          p_buf->auth_req = auth_req;
  
          memcpy(&p_buf->srvc_id, &p_descr_id->char_id.srvc_id, sizeof(tBTA_GATT_SRVC_ID));
          memcpy(&p_buf->char_id, &p_descr_id->char_id.char_id, sizeof(tBTA_GATT_ID));
          p_buf->p_descr_type  = (tBTA_GATT_ID *)(p_buf + 1);
  
          memcpy(p_buf->p_descr_type, &p_descr_id->descr_id, sizeof(tBTA_GATT_ID));
  
          bta_sys_sendmsg(p_buf);
      }
      return;
  
  }
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_ReadMultiple
  **
  ** Description      This function is called to read multiple characteristic or
  **                  characteristic descriptors.
  **
  ** Parameters       conn_id - connection ID.
  **                    p_read_multi - pointer to the read multiple parameter.
  **
  ** Returns          None
  **
  *******************************************************************************/
  void BTA_GATTC_ReadMultiple(UINT16 conn_id, tBTA_GATTC_MULTI *p_read_multi,
                              tBTA_GATT_AUTH_REQ auth_req)
  {
      tBTA_GATTC_API_READ_MULTI  *p_buf;
      tBTA_GATTC_ATTR_ID          *p_value;
      UINT16      len = (UINT16)(sizeof(tBTA_GATTC_API_READ_MULTI) +
                                 p_read_multi->num_attr * sizeof(tBTA_GATTC_ATTR_ID));
      UINT8       i;
  
      if ((p_buf = (tBTA_GATTC_API_READ_MULTI *) GKI_getbuf(len)) != NULL) {
          memset(p_buf, 0, len);
  
          p_buf->hdr.event = BTA_GATTC_API_READ_MULTI_EVT;
          p_buf->hdr.layer_specific = conn_id;
          p_buf->auth_req = auth_req;
  
          p_buf->num_attr = p_read_multi->num_attr;
  
          if (p_buf->num_attr > 0) {
              p_buf->p_id_list = p_value = (tBTA_GATTC_ATTR_ID *)(p_buf + 1);
  
              for (i = 0; i < p_buf->num_attr; i ++, p_value ++) {
                  memcpy(p_value, &p_read_multi->id_list[i], sizeof(tBTA_GATTC_ATTR_ID));
              }
          }
          bta_sys_sendmsg(p_buf);
      }
      return;
  }
  
  
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_WriteCharValue
  **
  ** Description      This function is called to write characteristic value.
  **
  ** Parameters       conn_id - connection ID.
  **                    p_char_id - characteristic ID to write.
  **                    write_type - type of write.
  **                  len: length of the data to be written.
  **                  p_value - the value to be written.
  **
  ** Returns          None
  **
  *******************************************************************************/
  void BTA_GATTC_WriteCharValue ( UINT16 conn_id,
                                  tBTA_GATTC_CHAR_ID *p_char_id,
                                  tBTA_GATTC_WRITE_TYPE  write_type,
                                  UINT16 len,
                                  UINT8 *p_value,
                                  tBTA_GATT_AUTH_REQ auth_req)
  {
      tBTA_GATTC_API_WRITE  *p_buf;
  
      if ((p_buf = (tBTA_GATTC_API_WRITE *) GKI_getbuf((UINT16)(sizeof(tBTA_GATTC_API_WRITE) + len))) != NULL) {
          memset(p_buf, 0, sizeof(tBTA_GATTC_API_WRITE) + len);
  
          p_buf->hdr.event = BTA_GATTC_API_WRITE_EVT;
          p_buf->hdr.layer_specific = conn_id;
          p_buf->auth_req = auth_req;
  
          memcpy(&p_buf->srvc_id, &p_char_id->srvc_id, sizeof(tBTA_GATT_SRVC_ID));
          memcpy(&p_buf->char_id, &p_char_id->char_id, sizeof(tBTA_GATT_ID));
  
          p_buf->write_type = write_type;
          p_buf->len = len;
  
          if (p_value && len > 0) {
              p_buf->p_value = (UINT8 *)(p_buf + 1);
              memcpy(p_buf->p_value, p_value, len);
          }
  
          bta_sys_sendmsg(p_buf);
      }
      return;
  }
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_WriteCharDescr
  **
  ** Description      This function is called to write characteristic descriptor value.
  **
  ** Parameters       conn_id - connection ID
  **                    p_char_descr_id - characteristic descriptor ID to write.
  **                  write_type - write type.
  **                  p_value - the value to be written.
  **
  ** Returns          None
  **
  *******************************************************************************/
  void BTA_GATTC_WriteCharDescr (UINT16 conn_id,
                                 tBTA_GATTC_CHAR_DESCR_ID *p_char_descr_id,
                                 tBTA_GATTC_WRITE_TYPE  write_type,
                                 tBTA_GATT_UNFMT      *p_data,
                                 tBTA_GATT_AUTH_REQ auth_req)
  {
      tBTA_GATTC_API_WRITE  *p_buf;
      UINT16  len = sizeof(tBTA_GATTC_API_WRITE) + sizeof(tBTA_GATT_ID);
  
      if (p_data != NULL) {
          len += p_data->len;
      }
  
      if ((p_buf = (tBTA_GATTC_API_WRITE *) GKI_getbuf(len)) != NULL) {
          memset(p_buf, 0, len);
  
          p_buf->hdr.event = BTA_GATTC_API_WRITE_EVT;
          p_buf->hdr.layer_specific = conn_id;
          p_buf->auth_req = auth_req;
  
          memcpy(&p_buf->srvc_id, &p_char_descr_id->char_id.srvc_id, sizeof(tBTA_GATT_SRVC_ID));
          memcpy(&p_buf->char_id, &p_char_descr_id->char_id.char_id, sizeof(tBTA_GATT_ID));
          p_buf->p_descr_type = (tBTA_GATT_ID *)(p_buf + 1);
          memcpy(p_buf->p_descr_type, &p_char_descr_id->descr_id, sizeof(tBTA_GATT_ID));
          p_buf->write_type = write_type;
  
          if (p_data && p_data->len != 0) {
              p_buf->p_value  = (UINT8 *)(p_buf->p_descr_type + 1);
              p_buf->len      = p_data->len;
              /* pack the descr data */
              memcpy(p_buf->p_value, p_data->p_value, p_data->len);
          }
  
          bta_sys_sendmsg(p_buf);
      }
      return;
  
  }
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_PrepareWrite
  **
  ** Description      This function is called to prepare write a characteristic value.
  **
  ** Parameters       conn_id - connection ID.
  **                    p_char_id - GATT characteritic ID of the service.
  **                  offset - offset of the write value.
  **                  len: length of the data to be written.
  **                  p_value - the value to be written.
  **
  ** Returns          None
  **
  *******************************************************************************/
  void BTA_GATTC_PrepareWrite  (UINT16 conn_id, tBTA_GATTC_CHAR_ID *p_char_id,
                                UINT16 offset, UINT16 len, UINT8 *p_value,
                                tBTA_GATT_AUTH_REQ auth_req)
  {
      tBTA_GATTC_API_WRITE  *p_buf;
  
      if ((p_buf = (tBTA_GATTC_API_WRITE *) GKI_getbuf((UINT16)(sizeof(tBTA_GATTC_API_WRITE) + len))) != NULL) {
          memset(p_buf, 0, sizeof(tBTA_GATTC_API_WRITE) + len);
  
          p_buf->hdr.event = BTA_GATTC_API_WRITE_EVT;
          p_buf->hdr.layer_specific = conn_id;
          p_buf->auth_req = auth_req;
  
          memcpy(&p_buf->srvc_id, &p_char_id->srvc_id, sizeof(tBTA_GATT_SRVC_ID));
          memcpy(&p_buf->char_id, &p_char_id->char_id, sizeof(tBTA_GATT_ID));
  
          p_buf->write_type = BTA_GATTC_WRITE_PREPARE;
          p_buf->offset   = offset;
          p_buf->len = len;
  
          if (p_value && len > 0) {
              p_buf->p_value = (UINT8 *)(p_buf + 1);
              memcpy(p_buf->p_value, p_value, len);
          }
  
          bta_sys_sendmsg(p_buf);
      }
      return;
  
  }
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_ExecuteWrite
  **
  ** Description      This function is called to execute write a prepare write sequence.
  **
  ** Parameters       conn_id - connection ID.
  **                    is_execute - execute or cancel.
  **
  ** Returns          None
  **
  *******************************************************************************/
  void BTA_GATTC_ExecuteWrite  (UINT16 conn_id, BOOLEAN is_execute)
  {
      tBTA_GATTC_API_EXEC  *p_buf;
  
      if ((p_buf = (tBTA_GATTC_API_EXEC *) GKI_getbuf((UINT16)sizeof(tBTA_GATTC_API_EXEC))) != NULL) {
          memset(p_buf, 0, sizeof(tBTA_GATTC_API_EXEC));
  
          p_buf->hdr.event = BTA_GATTC_API_EXEC_EVT;
          p_buf->hdr.layer_specific = conn_id;
  
          p_buf->is_execute = is_execute;
  
          bta_sys_sendmsg(p_buf);
      }
      return;
  
  }
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_SendIndConfirm
  **
  ** Description      This function is called to send handle value confirmation.
  **
  ** Parameters       conn_id - connection ID.
  **                    p_char_id - characteristic ID to confirm.
  **
  ** Returns          None
  **
  *******************************************************************************/
  void BTA_GATTC_SendIndConfirm (UINT16 conn_id, tBTA_GATTC_CHAR_ID *p_char_id)
  {
      tBTA_GATTC_API_CONFIRM  *p_buf;
  
      APPL_TRACE_API("BTA_GATTC_SendIndConfirm conn_id=%d service uuid1=0x%x char uuid=0x%x",
                     conn_id, p_char_id->srvc_id.id.uuid.uu.uuid16, p_char_id->char_id.uuid.uu.uuid16);
  
      if ((p_buf = (tBTA_GATTC_API_CONFIRM *) GKI_getbuf(sizeof(tBTA_GATTC_API_CONFIRM))) != NULL) {
          memset(p_buf, 0, sizeof(tBTA_GATTC_API_CONFIRM));
  
          p_buf->hdr.event = BTA_GATTC_API_CONFIRM_EVT;
          p_buf->hdr.layer_specific = conn_id;
  
          memcpy(&p_buf->srvc_id, &p_char_id->srvc_id, sizeof(tBTA_GATT_SRVC_ID));
          memcpy(&p_buf->char_id, &p_char_id->char_id, sizeof(tBTA_GATT_ID));
  
          bta_sys_sendmsg(p_buf);
      }
      return;
  
  }
  
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_RegisterForNotifications
  **
  ** Description      This function is called to register for notification of a service.
  **
  ** Parameters       client_if - client interface.
  **                  bda - target GATT server.
  **                  p_char_id - pointer to GATT characteristic ID.
  **
  ** Returns          OK if registration succeed, otherwise failed.
  **
  *******************************************************************************/
  tBTA_GATT_STATUS BTA_GATTC_RegisterForNotifications (tBTA_GATTC_IF client_if,
          BD_ADDR bda,
          tBTA_GATTC_CHAR_ID *p_char_id)
  {
      tBTA_GATTC_RCB      *p_clreg;
      tBTA_GATT_STATUS    status = BTA_GATT_ILLEGAL_PARAMETER;
      UINT8               i;
  
      if (!p_char_id) {
          APPL_TRACE_ERROR("deregistration failed, unknow char id");
          return status;
      }
  
      if ((p_clreg = bta_gattc_cl_get_regcb(client_if)) != NULL) {
          for (i = 0; i < BTA_GATTC_NOTIF_REG_MAX; i ++) {
              if ( p_clreg->notif_reg[i].in_use &&
                      !memcmp(p_clreg->notif_reg[i].remote_bda, bda, BD_ADDR_LEN) &&
                      bta_gattc_charid_compare(&p_clreg->notif_reg[i].char_id, p_char_id)) {
                  APPL_TRACE_WARNING("notification already registered");
                  status = BTA_GATT_OK;
                  break;
              }
          }
          if (status != BTA_GATT_OK) {
              for (i = 0; i < BTA_GATTC_NOTIF_REG_MAX; i ++) {
                  if (!p_clreg->notif_reg[i].in_use) {
                      memset((void *)&p_clreg->notif_reg[i], 0, sizeof(tBTA_GATTC_NOTIF_REG));
  
                      p_clreg->notif_reg[i].in_use = TRUE;
                      memcpy(p_clreg->notif_reg[i].remote_bda, bda, BD_ADDR_LEN);
  
                      p_clreg->notif_reg[i].char_id.srvc_id.is_primary = p_char_id->srvc_id.is_primary;
                      bta_gattc_cpygattid(&p_clreg->notif_reg[i].char_id.srvc_id.id, &p_char_id->srvc_id.id);
                      bta_gattc_cpygattid(&p_clreg->notif_reg[i].char_id.char_id, &p_char_id->char_id);
  
                      status = BTA_GATT_OK;
                      break;
                  }
              }
              if (i == BTA_GATTC_NOTIF_REG_MAX) {
                  status = BTA_GATT_NO_RESOURCES;
                  APPL_TRACE_ERROR("Max Notification Reached, registration failed.");
              }
          }
      } else {
          APPL_TRACE_ERROR("Client_if: %d Not Registered", client_if);
      }
  
      return status;
  }
  
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_DeregisterForNotifications
  **
  ** Description      This function is called to de-register for notification of a service.
  **
  ** Parameters       client_if - client interface.
  **                  bda - target GATT server.
  **                  p_char_id - pointer to GATT characteristic ID.
  **
  ** Returns          OK if deregistration succeed, otherwise failed.
  **
  *******************************************************************************/
  tBTA_GATT_STATUS BTA_GATTC_DeregisterForNotifications (tBTA_GATTC_IF client_if,
          BD_ADDR bda,
          tBTA_GATTC_CHAR_ID *p_char_id)
  {
      tBTA_GATTC_RCB      *p_clreg;
      tBTA_GATT_STATUS    status = BTA_GATT_ILLEGAL_PARAMETER;
      UINT8               i;
  
      if (!p_char_id) {
          APPL_TRACE_ERROR("%s deregistration failed, unknown char id", __func__);
          return status;
      }
  
      if ((p_clreg = bta_gattc_cl_get_regcb(client_if)) != NULL) {
          for (i = 0; i < BTA_GATTC_NOTIF_REG_MAX; i ++) {
              if (p_clreg->notif_reg[i].in_use &&
                      !memcmp(p_clreg->notif_reg[i].remote_bda, bda, BD_ADDR_LEN) &&
                      bta_gattc_charid_compare(&p_clreg->notif_reg[i].char_id, p_char_id)) {
                  APPL_TRACE_DEBUG("%s deregistered bd_addr:%02x:%02x:%02x:%02x:%02x:%02x",
                                   __func__, bda[0], bda[1], bda[2], bda[3], bda[4], bda[5]);
                  memset(&p_clreg->notif_reg[i], 0, sizeof(tBTA_GATTC_NOTIF_REG));
                  status = BTA_GATT_OK;
                  break;
              }
          }
          if (i == BTA_GATTC_NOTIF_REG_MAX) {
              status = BTA_GATT_ERROR;
              APPL_TRACE_ERROR("%s registration not found bd_addr:%02x:%02x:%02x:%02x:%02x:%02x",
                               __func__, bda[0], bda[1], bda[2], bda[3], bda[4], bda[5]);
          }
      } else {
          APPL_TRACE_ERROR("%s client_if: %d not registered bd_addr:%02x:%02x:%02x:%02x:%02x:%02x",
                           __func__, client_if, bda[0], bda[1], bda[2], bda[3], bda[4], bda[5]);
      }
  
      return status;
  }
  
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_Refresh
  **
  ** Description      Refresh the server cache of the remote device
  **
  ** Parameters       remote_bda: remote device BD address.
  **
  ** Returns          void
  **
  *******************************************************************************/
  void BTA_GATTC_Refresh(BD_ADDR remote_bda)
  {
      tBTA_GATTC_API_OPEN  *p_buf;
  
      if ((p_buf = (tBTA_GATTC_API_OPEN *) GKI_getbuf(sizeof(tBTA_GATTC_API_OPEN))) != NULL) {
          p_buf->hdr.event = BTA_GATTC_API_REFRESH_EVT;
  
          memcpy(p_buf->remote_bda, remote_bda, BD_ADDR_LEN);
  
  
          bta_sys_sendmsg(p_buf);
      }
      return;
  }
  
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_Listen
  **
  ** Description      Start advertisement to listen for connection request for a GATT
  **                  client application.
  **
  ** Parameters       client_if: server interface.
  **                  start: to start or stop listening for connection
  **                  remote_bda: remote device BD address, if listen to all device
  **                              use NULL.
  **
  ** Returns          void
  **
  *******************************************************************************/
  void BTA_GATTC_Listen(tBTA_GATTC_IF client_if, BOOLEAN start, BD_ADDR_PTR target_bda)
  {
      tBTA_GATTC_API_LISTEN  *p_buf;
  
      if ((p_buf = (tBTA_GATTC_API_LISTEN *) GKI_getbuf((UINT16)(sizeof(tBTA_GATTC_API_LISTEN) + BD_ADDR_LEN))) != NULL) {
          p_buf->hdr.event = BTA_GATTC_API_LISTEN_EVT;
  
          p_buf->client_if = client_if;
          p_buf->start = start;
          if (target_bda) {
              p_buf->remote_bda = (UINT8 *)(p_buf + 1);
              memcpy(p_buf->remote_bda, target_bda, BD_ADDR_LEN);
          } else {
              p_buf->remote_bda = NULL;
          }
  
          bta_sys_sendmsg(p_buf);
      }
      return;
  }
  
  /*******************************************************************************
  **
  ** Function         BTA_GATTC_Broadcast
  **
  ** Description      Start broadcasting (non-connectable advertisements)
  **
  ** Parameters       client_if: client interface.
  **                  start: to start or stop listening for connection
  **
  ** Returns          void
  **
  *******************************************************************************/
  void BTA_GATTC_Broadcast(tBTA_GATTC_IF client_if, BOOLEAN start)
  {
      tBTA_GATTC_API_LISTEN  *p_buf;
  
      if ((p_buf = (tBTA_GATTC_API_LISTEN *) GKI_getbuf((UINT16)(sizeof(tBTA_GATTC_API_LISTEN) + BD_ADDR_LEN))) != NULL) {
          p_buf->hdr.event = BTA_GATTC_API_BROADCAST_EVT;
          p_buf->client_if = client_if;
          p_buf->start = start;
          bta_sys_sendmsg(p_buf);
      }
      return;
  }
  
  #endif /* BTA_GATT_INCLUDED */
  
  