stack/sdp/sdp_api.cc

/******************************************************************************
 *
 *  Copyright (C) 1999-2012 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 SDP interface functions
 *
 ******************************************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "bt_common.h"
#include "bt_target.h"
#include "bt_utils.h"
#include "hcidefs.h"
#include "hcimsgs.h"
#include "l2cdefs.h"

#include "btu.h"
#include "sdp_api.h"
#include "sdpint.h"

#include "osi/include/osi.h"

/**********************************************************************
 *   C L I E N T    F U N C T I O N    P R O T O T Y P E S            *
 **********************************************************************/

/*******************************************************************************
 *
 * Function         SDP_InitDiscoveryDb
 *
 * Description      This function is called to initialize a discovery database.
 *
 * Parameters:      p_db        - (input) address of an area of memory where the
 *                                        discovery database is managed.
 *                  len         - (input) size (in bytes) of the memory
 *                                 NOTE: This must be larger than
 *                                       sizeof(tSDP_DISCOVERY_DB)
 *                  num_uuid    - (input) number of UUID filters applied
 *                  p_uuid_list - (input) list of UUID filters
 *                  num_attr    - (input) number of attribute filters applied
 *                  p_attr_list - (input) list of attribute filters
 *
 *
 * Returns          bool
 *                          true if successful
 *                          false if one or more parameters are bad
 *
 ******************************************************************************/
bool SDP_InitDiscoveryDb(tSDP_DISCOVERY_DB* p_db, uint32_t len,
                         uint16_t num_uuid, tSDP_UUID* p_uuid_list,
                         uint16_t num_attr, uint16_t* p_attr_list) {
#if (SDP_CLIENT_ENABLED == TRUE)
  uint16_t xx;

  /* verify the parameters */
  if (p_db == NULL || (sizeof(tSDP_DISCOVERY_DB) > len) ||
      num_attr > SDP_MAX_ATTR_FILTERS || num_uuid > SDP_MAX_UUID_FILTERS) {
    SDP_TRACE_ERROR(
        "SDP_InitDiscoveryDb Illegal param: p_db 0x%x, len %d, num_uuid %d, "
        "num_attr %d",
        PTR_TO_UINT(p_db), len, num_uuid, num_attr);

    return (false);
  }

  memset(p_db, 0, (size_t)len);

  p_db->mem_size = len - sizeof(tSDP_DISCOVERY_DB);
  p_db->mem_free = p_db->mem_size;
  p_db->p_first_rec = NULL;
  p_db->p_free_mem = (uint8_t*)(p_db + 1);

  for (xx = 0; xx < num_uuid; xx++) p_db->uuid_filters[xx] = *p_uuid_list++;

  p_db->num_uuid_filters = num_uuid;

  for (xx = 0; xx < num_attr; xx++) p_db->attr_filters[xx] = *p_attr_list++;

  /* sort attributes */
  sdpu_sort_attr_list(num_attr, p_db);

  p_db->num_attr_filters = num_attr;
#endif
  return (true);
}

/*******************************************************************************
 *
 * Function         SDP_CancelServiceSearch
 *
 * Description      This function cancels an active query to an SDP server.
 *
 * Returns          true if discovery cancelled, false if a matching activity is
 *                  not found.
 *
 ******************************************************************************/
bool SDP_CancelServiceSearch(tSDP_DISCOVERY_DB* p_db) {
#if (SDP_CLIENT_ENABLED == TRUE)
  tCONN_CB* p_ccb = sdpu_find_ccb_by_db(p_db);
  if (!p_ccb) return (false);

  sdp_disconnect(p_ccb, SDP_CANCEL);
  p_ccb->disc_state = SDP_DISC_WAIT_CANCEL;
#endif
  return (true);
}

/*******************************************************************************
 *
 * Function         SDP_ServiceSearchRequest
 *
 * Description      This function queries an SDP server for information.
 *
 * Returns          true if discovery started, false if failed.
 *
 ******************************************************************************/
bool SDP_ServiceSearchRequest(uint8_t* p_bd_addr, tSDP_DISCOVERY_DB* p_db,
                              tSDP_DISC_CMPL_CB* p_cb) {
#if (SDP_CLIENT_ENABLED == TRUE)
  tCONN_CB* p_ccb;

  /* Specific BD address */
  p_ccb = sdp_conn_originate(p_bd_addr);

  if (!p_ccb) return (false);

  p_ccb->disc_state = SDP_DISC_WAIT_CONN;
  p_ccb->p_db = p_db;
  p_ccb->p_cb = p_cb;

  return (true);
#else
  return (false);
#endif
}

/*******************************************************************************
 *
 * Function         SDP_ServiceSearchAttributeRequest
 *
 * Description      This function queries an SDP server for information.
 *
 *                  The difference between this API function and the function
 *                  SDP_ServiceSearchRequest is that this one does a
 *                  combined ServiceSearchAttributeRequest SDP function.
 *                  (This is for Unplug Testing)
 *
 * Returns          true if discovery started, false if failed.
 *
 ******************************************************************************/
bool SDP_ServiceSearchAttributeRequest(uint8_t* p_bd_addr,
                                       tSDP_DISCOVERY_DB* p_db,
                                       tSDP_DISC_CMPL_CB* p_cb) {
#if (SDP_CLIENT_ENABLED == TRUE)
  tCONN_CB* p_ccb;

  /* Specific BD address */
  p_ccb = sdp_conn_originate(p_bd_addr);

  if (!p_ccb) return (false);

  p_ccb->disc_state = SDP_DISC_WAIT_CONN;
  p_ccb->p_db = p_db;
  p_ccb->p_cb = p_cb;

  p_ccb->is_attr_search = true;

  return (true);
#else
  return (false);
#endif
}
/*******************************************************************************
 *
 * Function         SDP_ServiceSearchAttributeRequest2
 *
 * Description      This function queries an SDP server for information.
 *
 *                  The difference between this API function and the function
 *                  SDP_ServiceSearchRequest is that this one does a
 *                  combined ServiceSearchAttributeRequest SDP function.
 *                  (This is for Unplug Testing)
 *
 * Returns          true if discovery started, false if failed.
 *
 ******************************************************************************/
bool SDP_ServiceSearchAttributeRequest2(uint8_t* p_bd_addr,
                                        tSDP_DISCOVERY_DB* p_db,
                                        tSDP_DISC_CMPL_CB2* p_cb2,
                                        void* user_data) {
#if (SDP_CLIENT_ENABLED == TRUE)
  tCONN_CB* p_ccb;

  /* Specific BD address */
  p_ccb = sdp_conn_originate(p_bd_addr);

  if (!p_ccb) return (false);

  p_ccb->disc_state = SDP_DISC_WAIT_CONN;
  p_ccb->p_db = p_db;
  p_ccb->p_cb2 = p_cb2;

  p_ccb->is_attr_search = true;
  p_ccb->user_data = user_data;

  return (true);
#else
  return (false);
#endif
}

#if (SDP_CLIENT_ENABLED == TRUE)
void SDP_SetIdleTimeout(UNUSED_ATTR BD_ADDR addr,
                        UNUSED_ATTR uint16_t timeout) {}
#endif

/*******************************************************************************
 *
 * Function         SDP_FindAttributeInDb
 *
 * Description      This function queries an SDP database for a specific
 *                  attribute. If the p_start_rec pointer is NULL, it looks from
 *                  the beginning of the database, else it continues from the
 *                  next record after p_start_rec.
 *
 * Returns          Pointer to matching record, or NULL
 *
 ******************************************************************************/
tSDP_DISC_REC* SDP_FindAttributeInDb(tSDP_DISCOVERY_DB* p_db, uint16_t attr_id,
                                     tSDP_DISC_REC* p_start_rec) {
#if (SDP_CLIENT_ENABLED == TRUE)
  tSDP_DISC_REC* p_rec;
  tSDP_DISC_ATTR* p_attr;

  /* Must have a valid database */
  if (p_db == NULL) return (NULL);

  if (!p_start_rec)
    p_rec = p_db->p_first_rec;
  else
    p_rec = p_start_rec->p_next_rec;

  while (p_rec) {
    p_attr = p_rec->p_first_attr;
    while (p_attr) {
      if (p_attr->attr_id == attr_id) return (p_rec);

      p_attr = p_attr->p_next_attr;
    }

    p_rec = p_rec->p_next_rec;
  }
#endif
  /* If here, no matching attribute found */
  return (NULL);
}

/*******************************************************************************
 *
 * Function         SDP_FindAttributeInRec
 *
 * Description      This function searches an SDP discovery record for a
 *                  specific attribute.
 *
 * Returns          Pointer to matching attribute entry, or NULL
 *
 ******************************************************************************/
tSDP_DISC_ATTR* SDP_FindAttributeInRec(tSDP_DISC_REC* p_rec, uint16_t attr_id) {
#if (SDP_CLIENT_ENABLED == TRUE)
  tSDP_DISC_ATTR* p_attr;

  p_attr = p_rec->p_first_attr;
  while (p_attr) {
    if (p_attr->attr_id == attr_id) return (p_attr);

    p_attr = p_attr->p_next_attr;
  }
#endif
  /* If here, no matching attribute found */
  return (NULL);
}

/*******************************************************************************
 *
 * Function         SDP_FindServiceUUIDInRec
 *
 * Description      This function is called to read the service UUID within a
 *                  record if there is any.
 *
 * Parameters:      p_rec      - pointer to a SDP record.
 *                  p_uuid     - output parameter to save the UUID found.
 *
 * Returns          true if found, otherwise false.
 *
 ******************************************************************************/
bool SDP_FindServiceUUIDInRec(tSDP_DISC_REC* p_rec, tBT_UUID* p_uuid) {
#if (SDP_CLIENT_ENABLED == TRUE)
  tSDP_DISC_ATTR *p_attr, *p_sattr, *p_extra_sattr;

  p_attr = p_rec->p_first_attr;

  while (p_attr) {
    if ((p_attr->attr_id == ATTR_ID_SERVICE_CLASS_ID_LIST) &&
        (SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) == DATA_ELE_SEQ_DESC_TYPE)) {
      for (p_sattr = p_attr->attr_value.v.p_sub_attr; p_sattr;
           p_sattr = p_sattr->p_next_attr) {
        if (SDP_DISC_ATTR_TYPE(p_sattr->attr_len_type) == UUID_DESC_TYPE) {
          if (SDP_DISC_ATTR_LEN(p_sattr->attr_len_type) == LEN_UUID_16) {
            p_uuid->len = LEN_UUID_16;
            p_uuid->uu.uuid16 = p_sattr->attr_value.v.u16;
          } else if (SDP_DISC_ATTR_LEN(p_sattr->attr_len_type) ==
                     LEN_UUID_128) {
            p_uuid->len = LEN_UUID_128;
            for (uint8_t i = 0; i != LEN_UUID_128; ++i)
              p_uuid->uu.uuid128[i] =
                  p_sattr->attr_value.v.array[LEN_UUID_128 - i - 1];
          } else if (SDP_DISC_ATTR_LEN(p_sattr->attr_len_type) == LEN_UUID_32) {
            p_uuid->len = LEN_UUID_32;
            p_uuid->uu.uuid32 = p_sattr->attr_value.v.u32;
          }

          return (true);
        }

        /* Checking for Toyota G Block Car Kit:
        **  This car kit puts an extra data element sequence
        **  where the UUID is suppose to be!!!
        */
        else {
          if (SDP_DISC_ATTR_TYPE(p_sattr->attr_len_type) ==
              DATA_ELE_SEQ_DESC_TYPE) {
            /* Look through data element sequence until no more UUIDs */
            for (p_extra_sattr = p_sattr->attr_value.v.p_sub_attr;
                 p_extra_sattr; p_extra_sattr = p_extra_sattr->p_next_attr) {
              /* Increment past this to see if the next attribut is UUID */
              if ((SDP_DISC_ATTR_TYPE(p_extra_sattr->attr_len_type) ==
                   UUID_DESC_TYPE)
                  /* only support 16 bits UUID for now */
                  && (SDP_DISC_ATTR_LEN(p_extra_sattr->attr_len_type) == 2)) {
                p_uuid->len = 2;
                p_uuid->uu.uuid16 = p_extra_sattr->attr_value.v.u16;
                return (true);
              }
            }
          }
        }
      }
      break;
    } else if (p_attr->attr_id == ATTR_ID_SERVICE_ID) {
      if ((SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) == UUID_DESC_TYPE)
          /* only support 16 bits UUID for now */
          && (SDP_DISC_ATTR_LEN(p_attr->attr_len_type) == 2)) {
        p_uuid->len = 2;
        p_uuid->uu.uuid16 = p_attr->attr_value.v.u16;
        return (true);
      }
    }
    p_attr = p_attr->p_next_attr;
  }
  return false;
#endif
}

/*******************************************************************************
 *
 * Function         SDP_FindServiceUUIDInRec_128bit
 *
 * Description      This function is called to read the 128-bit service UUID
 *                  within a record if there is any.
 *
 * Parameters:      p_rec      - pointer to a SDP record.
 *                  p_uuid     - output parameter to save the UUID found.
 *
 * Returns          true if found, otherwise false.
 *
 ******************************************************************************/
bool SDP_FindServiceUUIDInRec_128bit(tSDP_DISC_REC* p_rec, tBT_UUID* p_uuid) {
#if (SDP_CLIENT_ENABLED == TRUE)
  tSDP_DISC_ATTR* p_attr = p_rec->p_first_attr;
  while (p_attr) {
    if ((p_attr->attr_id == ATTR_ID_SERVICE_CLASS_ID_LIST) &&
        (SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) == DATA_ELE_SEQ_DESC_TYPE)) {
      tSDP_DISC_ATTR* p_sattr = p_attr->attr_value.v.p_sub_attr;
      while (p_sattr) {
        if (SDP_DISC_ATTR_TYPE(p_sattr->attr_len_type) == UUID_DESC_TYPE) {
          /* only support 128 bits UUID for now */
          if (SDP_DISC_ATTR_LEN(p_sattr->attr_len_type) == 16) {
            p_uuid->len = LEN_UUID_128;
            for (uint8_t i = 0; i != LEN_UUID_128; ++i)
              p_uuid->uu.uuid128[i] =
                  p_sattr->attr_value.v.array[LEN_UUID_128 - i - 1];
          }
          return (true);
        }

        p_sattr = p_sattr->p_next_attr;
      }
      break;
    } else if (p_attr->attr_id == ATTR_ID_SERVICE_ID) {
      if ((SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) == UUID_DESC_TYPE)
          /* only support 128 bits UUID for now */
          && (SDP_DISC_ATTR_LEN(p_attr->attr_len_type) == 16)) {
        p_uuid->len = LEN_UUID_128;
        for (uint8_t i = 0; i != LEN_UUID_128; ++i)
          p_uuid->uu.uuid128[i] =
              p_attr->attr_value.v.array[LEN_UUID_128 - i - 1];
        return (true);
      }
    }
    p_attr = p_attr->p_next_attr;
  }
  return false;
#endif
}

/*******************************************************************************
 *
 * Function         SDP_FindServiceInDb
 *
 * Description      This function queries an SDP database for a specific
 *                  service. If the p_start_rec pointer is NULL, it looks from
 *                  the beginning of the database, else it continues from the
 *                  next record after p_start_rec.
 *
 * Returns          Pointer to record containing service class, or NULL
 *
 ******************************************************************************/
tSDP_DISC_REC* SDP_FindServiceInDb(tSDP_DISCOVERY_DB* p_db,
                                   uint16_t service_uuid,
                                   tSDP_DISC_REC* p_start_rec) {
#if (SDP_CLIENT_ENABLED == TRUE)
  tSDP_DISC_REC* p_rec;
  tSDP_DISC_ATTR *p_attr, *p_sattr, *p_extra_sattr;

  /* Must have a valid database */
  if (p_db == NULL) return (NULL);

  if (!p_start_rec)
    p_rec = p_db->p_first_rec;
  else
    p_rec = p_start_rec->p_next_rec;

  while (p_rec) {
    p_attr = p_rec->p_first_attr;
    while (p_attr) {
      if ((p_attr->attr_id == ATTR_ID_SERVICE_CLASS_ID_LIST) &&
          (SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) ==
           DATA_ELE_SEQ_DESC_TYPE)) {
        for (p_sattr = p_attr->attr_value.v.p_sub_attr; p_sattr;
             p_sattr = p_sattr->p_next_attr) {
          if ((SDP_DISC_ATTR_TYPE(p_sattr->attr_len_type) == UUID_DESC_TYPE) &&
              (SDP_DISC_ATTR_LEN(p_sattr->attr_len_type) == 2)) {
            SDP_TRACE_DEBUG(
                "SDP_FindServiceInDb - p_sattr value = 0x%x serviceuuid = 0x%x",
                p_sattr->attr_value.v.u16, service_uuid);
            if (service_uuid == UUID_SERVCLASS_HDP_PROFILE) {
              if ((p_sattr->attr_value.v.u16 == UUID_SERVCLASS_HDP_SOURCE) ||
                  (p_sattr->attr_value.v.u16 == UUID_SERVCLASS_HDP_SINK)) {
                SDP_TRACE_DEBUG(
                    "SDP_FindServiceInDb found HDP source or sink\n");
                return (p_rec);
              }
            }
          }

          if (SDP_DISC_ATTR_TYPE(p_sattr->attr_len_type) == UUID_DESC_TYPE &&
              (service_uuid == 0 ||
               (SDP_DISC_ATTR_LEN(p_sattr->attr_len_type) == 2 &&
                p_sattr->attr_value.v.u16 == service_uuid)))
          /* for a specific uuid, or any one */
          {
            return (p_rec);
          }

          /* Checking for Toyota G Block Car Kit:
          **  This car kit puts an extra data element sequence
          **  where the UUID is suppose to be!!!
          */
          else {
            if (SDP_DISC_ATTR_TYPE(p_sattr->attr_len_type) ==
                DATA_ELE_SEQ_DESC_TYPE) {
              /* Look through data element sequence until no more UUIDs */
              for (p_extra_sattr = p_sattr->attr_value.v.p_sub_attr;
                   p_extra_sattr; p_extra_sattr = p_extra_sattr->p_next_attr) {
                /* Increment past this to see if the next attribut is UUID */
                if ((SDP_DISC_ATTR_TYPE(p_extra_sattr->attr_len_type) ==
                     UUID_DESC_TYPE) &&
                    (SDP_DISC_ATTR_LEN(p_extra_sattr->attr_len_type) == 2)
                    /* for a specific uuid, or any one */
                    && ((p_extra_sattr->attr_value.v.u16 == service_uuid) ||
                        (service_uuid == 0))) {
                  return (p_rec);
                }
              }
            }
          }
        }
        break;
      } else if (p_attr->attr_id == ATTR_ID_SERVICE_ID) {
        if ((SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) == UUID_DESC_TYPE) &&
            (SDP_DISC_ATTR_LEN(p_attr->attr_len_type) == 2)
            /* find a specific UUID or anyone */
            &&
            ((p_attr->attr_value.v.u16 == service_uuid) || service_uuid == 0))
          return (p_rec);
      }

      p_attr = p_attr->p_next_attr;
    }

    p_rec = p_rec->p_next_rec;
  }
#endif
  /* If here, no matching UUID found */
  return (NULL);
}

/*******************************************************************************
 *
 * Function         SDP_FindServiceInDb_128bit
 *
 * Description      Query an SDP database for a specific service. If the
 *                  p_start_rec pointer is NULL, it looks from the beginning of
 *                  the database, else it continues from the next record after
 *                  p_start_rec.
 *
 *                  This function is kept separate from SDP_FindServiceInDb
 *                  since that API is expected to return only 16-bit UUIDs
 *
 * Returns          Pointer to record containing service class, or NULL
 *
 ******************************************************************************/
tSDP_DISC_REC* SDP_FindServiceInDb_128bit(tSDP_DISCOVERY_DB* p_db,
                                          tSDP_DISC_REC* p_start_rec) {
#if (SDP_CLIENT_ENABLED == TRUE)
  tSDP_DISC_REC* p_rec;
  tSDP_DISC_ATTR *p_attr, *p_sattr;

  /* Must have a valid database */
  if (p_db == NULL) return (NULL);

  if (!p_start_rec)
    p_rec = p_db->p_first_rec;
  else
    p_rec = p_start_rec->p_next_rec;

  while (p_rec) {
    p_attr = p_rec->p_first_attr;
    while (p_attr) {
      if ((p_attr->attr_id == ATTR_ID_SERVICE_CLASS_ID_LIST) &&
          (SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) ==
           DATA_ELE_SEQ_DESC_TYPE)) {
        for (p_sattr = p_attr->attr_value.v.p_sub_attr; p_sattr;
             p_sattr = p_sattr->p_next_attr) {
          if ((SDP_DISC_ATTR_TYPE(p_sattr->attr_len_type) == UUID_DESC_TYPE) &&
              (SDP_DISC_ATTR_LEN(p_sattr->attr_len_type) == 16)) {
            return (p_rec);
          }
        }
        break;
      } else if (p_attr->attr_id == ATTR_ID_SERVICE_ID) {
        if ((SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) == UUID_DESC_TYPE) &&
            (SDP_DISC_ATTR_LEN(p_attr->attr_len_type) == 16))
          return (p_rec);
      }

      p_attr = p_attr->p_next_attr;
    }

    p_rec = p_rec->p_next_rec;
  }
#endif
  /* If here, no matching UUID found */
  return (NULL);
}

/*******************************************************************************
 *
 * Function         SDP_FindServiceUUIDInDb
 *
 * Description      Query an SDP database for a specific service. If the
 *                  p_start_rec pointer is NULL, it looks from the beginning of
 *                  the database, else it continues from the next record after
 *                  p_start_rec.
 *
 * NOTE             the only difference between this function and the previous
 *                  function "SDP_FindServiceInDb()" is that this function takes
 *                  a tBT_UUID input
 *
 * Returns          Pointer to record containing service class, or NULL
 *
 ******************************************************************************/
tSDP_DISC_REC* SDP_FindServiceUUIDInDb(tSDP_DISCOVERY_DB* p_db,
                                       tBT_UUID* p_uuid,
                                       tSDP_DISC_REC* p_start_rec) {
#if (SDP_CLIENT_ENABLED == TRUE)
  tSDP_DISC_REC* p_rec;
  tSDP_DISC_ATTR *p_attr, *p_sattr;

  /* Must have a valid database */
  if (p_db == NULL) return (NULL);

  if (!p_start_rec)
    p_rec = p_db->p_first_rec;
  else
    p_rec = p_start_rec->p_next_rec;

  while (p_rec) {
    p_attr = p_rec->p_first_attr;
    while (p_attr) {
      if ((p_attr->attr_id == ATTR_ID_SERVICE_CLASS_ID_LIST) &&
          (SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) ==
           DATA_ELE_SEQ_DESC_TYPE)) {
        for (p_sattr = p_attr->attr_value.v.p_sub_attr; p_sattr;
             p_sattr = p_sattr->p_next_attr) {
          if (SDP_DISC_ATTR_TYPE(p_sattr->attr_len_type) == UUID_DESC_TYPE) {
            if (sdpu_compare_uuid_with_attr(p_uuid, p_sattr)) return (p_rec);
          }
        }
        break;
      } else if (p_attr->attr_id == ATTR_ID_SERVICE_ID) {
        if (SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) == UUID_DESC_TYPE) {
          if (sdpu_compare_uuid_with_attr(p_uuid, p_attr)) return (p_rec);
        }
      }

      p_attr = p_attr->p_next_attr;
    }

    p_rec = p_rec->p_next_rec;
  }
#endif /* CLIENT_ENABLED == TRUE */
  /* If here, no matching UUID found */
  return (NULL);
}

#if (SDP_CLIENT_ENABLED == TRUE)
/*******************************************************************************
 *
 * Function         sdp_fill_proto_elem
 *
 * Description      This function retrieves the protocol element.
 *
 * Returns          true if found, false if not
 *                  If found, the passed protocol list element is filled in.
 *
 ******************************************************************************/
static bool sdp_fill_proto_elem(tSDP_DISC_ATTR* p_attr, uint16_t layer_uuid,
                                tSDP_PROTOCOL_ELEM* p_elem) {
  tSDP_DISC_ATTR* p_sattr;

  /* Walk through the protocol descriptor list */
  for (p_attr = p_attr->attr_value.v.p_sub_attr; p_attr;
       p_attr = p_attr->p_next_attr) {
    /* Safety check - each entry should itself be a sequence */
    if (SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) != DATA_ELE_SEQ_DESC_TYPE)
      return (false);

    /* Now, see if the entry contains the layer we are interested in */
    for (p_sattr = p_attr->attr_value.v.p_sub_attr; p_sattr;
         p_sattr = p_sattr->p_next_attr) {
      /* SDP_TRACE_DEBUG ("SDP - p_sattr 0x%x, layer_uuid:0x%x, u16:0x%x####",
          p_sattr, layer_uuid, p_sattr->attr_value.v.u16); */

      if ((SDP_DISC_ATTR_TYPE(p_sattr->attr_len_type) == UUID_DESC_TYPE) &&
          (SDP_DISC_ATTR_LEN(p_sattr->attr_len_type) == 2) &&
          (p_sattr->attr_value.v.u16 == layer_uuid)) {
        /* Bingo. Now fill in the passed element */
        p_elem->protocol_uuid = layer_uuid;
        p_elem->num_params = 0;

        /* Store the parameters, if any */
        for (p_sattr = p_sattr->p_next_attr; p_sattr;
             p_sattr = p_sattr->p_next_attr) {
          if (SDP_DISC_ATTR_TYPE(p_sattr->attr_len_type) != UINT_DESC_TYPE)
            break;

          if (SDP_DISC_ATTR_LEN(p_sattr->attr_len_type) == 2)
            p_elem->params[p_elem->num_params++] = p_sattr->attr_value.v.u16;
          else
            p_elem->params[p_elem->num_params++] = p_sattr->attr_value.v.u8;

          if (p_elem->num_params >= SDP_MAX_PROTOCOL_PARAMS) break;
        }
        return (true);
      }
    }
  }

  return (false);
}
#endif /* CLIENT_ENABLED == TRUE */

/*******************************************************************************
 *
 * Function         SDP_FindProtocolListElemInRec
 *
 * Description      This function looks at a specific discovery record for a
 *                  protocol list element.
 *
 * Returns          true if found, false if not
 *                  If found, the passed protocol list element is filled in.
 *
 ******************************************************************************/
bool SDP_FindProtocolListElemInRec(tSDP_DISC_REC* p_rec, uint16_t layer_uuid,
                                   tSDP_PROTOCOL_ELEM* p_elem) {
#if (SDP_CLIENT_ENABLED == TRUE)
  tSDP_DISC_ATTR* p_attr;

  p_attr = p_rec->p_first_attr;
  while (p_attr) {
    /* Find the protocol descriptor list */
    if ((p_attr->attr_id == ATTR_ID_PROTOCOL_DESC_LIST) &&
        (SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) == DATA_ELE_SEQ_DESC_TYPE)) {
      return sdp_fill_proto_elem(p_attr, layer_uuid, p_elem);
    }
    p_attr = p_attr->p_next_attr;
  }
#endif
  /* If here, no match found */
  return (false);
}

/*******************************************************************************
 *
 * Function         SDP_FindAddProtoListsElemInRec
 *
 * Description      This function looks at a specific discovery record for a
 *                  protocol list element.
 *
 * Returns          true if found, false if not
 *                  If found, the passed protocol list element is filled in.
 *
 ******************************************************************************/
bool SDP_FindAddProtoListsElemInRec(tSDP_DISC_REC* p_rec, uint16_t layer_uuid,
                                    tSDP_PROTOCOL_ELEM* p_elem) {
#if (SDP_CLIENT_ENABLED == TRUE)
  tSDP_DISC_ATTR *p_attr, *p_sattr;
  bool ret = false;

  p_attr = p_rec->p_first_attr;
  while (p_attr) {
    /* Find the additional protocol descriptor list attribute */
    if ((p_attr->attr_id == ATTR_ID_ADDITION_PROTO_DESC_LISTS) &&
        (SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) == DATA_ELE_SEQ_DESC_TYPE)) {
      for (p_sattr = p_attr->attr_value.v.p_sub_attr; p_sattr;
           p_sattr = p_sattr->p_next_attr) {
        /* Safety check - each entry should itself be a sequence */
        if (SDP_DISC_ATTR_TYPE(p_sattr->attr_len_type) ==
            DATA_ELE_SEQ_DESC_TYPE) {
          ret = sdp_fill_proto_elem(p_sattr, layer_uuid, p_elem);
          if (ret == true) break;
        }
      }
      return ret;
    }
    p_attr = p_attr->p_next_attr;
  }
#endif
  /* If here, no match found */
  return (false);
}

/*******************************************************************************
 *
 * Function         SDP_FindProfileVersionInRec
 *
 * Description      This function looks at a specific discovery record for the
 *                  Profile list descriptor, and pulls out the version number.
 *                  The version number consists of an 8-bit major version and
 *                  an 8-bit minor version.
 *
 * Returns          true if found, false if not
 *                  If found, the major and minor version numbers that were
 *                  passed in are filled in.
 *
 ******************************************************************************/
bool SDP_FindProfileVersionInRec(tSDP_DISC_REC* p_rec, uint16_t profile_uuid,
                                 uint16_t* p_version) {
#if (SDP_CLIENT_ENABLED == TRUE)
  tSDP_DISC_ATTR *p_attr, *p_sattr;

  p_attr = p_rec->p_first_attr;
  while (p_attr) {
    /* Find the profile descriptor list */
    if ((p_attr->attr_id == ATTR_ID_BT_PROFILE_DESC_LIST) &&
        (SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) == DATA_ELE_SEQ_DESC_TYPE)) {
      /* Walk through the protocol descriptor list */
      for (p_attr = p_attr->attr_value.v.p_sub_attr; p_attr;
           p_attr = p_attr->p_next_attr) {
        /* Safety check - each entry should itself be a sequence */
        if (SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) != DATA_ELE_SEQ_DESC_TYPE)
          return (false);

        /* Now, see if the entry contains the profile UUID we are interested in
         */
        for (p_sattr = p_attr->attr_value.v.p_sub_attr; p_sattr;
             p_sattr = p_sattr->p_next_attr) {
          if ((SDP_DISC_ATTR_TYPE(p_sattr->attr_len_type) == UUID_DESC_TYPE) &&
              (SDP_DISC_ATTR_LEN(p_sattr->attr_len_type) ==
               2) /* <- This is bytes, not size code! */
              && (p_sattr->attr_value.v.u16 == profile_uuid)) {
            /* Now fill in the major and minor numbers */
            /* if the attribute matches the description for version (type UINT,
             * size 2 bytes) */
            p_sattr = p_sattr->p_next_attr;

            if ((SDP_DISC_ATTR_TYPE(p_sattr->attr_len_type) ==
                 UINT_DESC_TYPE) &&
                (SDP_DISC_ATTR_LEN(p_sattr->attr_len_type) == 2)) {
              /* The high order 8 bits is the major number, low order is the
               * minor number (big endian) */
              *p_version = p_sattr->attr_value.v.u16;

              return (true);
            } else
              return (false); /* The type and/or size was not valid for the
                                 profile list version */
          }
        }
      }

      return (false);
    }
    p_attr = p_attr->p_next_attr;
  }
#endif /* CLIENT_ENABLED == TRUE */

  /* If here, no match found */
  return (false);
}

/*******************************************************************************
 *                   Device Identification (DI) Client Functions
 ******************************************************************************/

/*******************************************************************************
 *
 * Function         SDP_DiDiscover
 *
 * Description      This function queries a remote device for DI information.
 *
 * Returns          SDP_SUCCESS if query started successfully, else error
 *
 ******************************************************************************/
uint16_t SDP_DiDiscover(BD_ADDR remote_device, tSDP_DISCOVERY_DB* p_db,
                        uint32_t len, tSDP_DISC_CMPL_CB* p_cb) {
#if (SDP_CLIENT_ENABLED == TRUE)
  uint16_t result = SDP_DI_DISC_FAILED;
  uint16_t num_uuids = 1;
  uint16_t di_uuid = UUID_SERVCLASS_PNP_INFORMATION;

  /* build uuid for db init */
  tSDP_UUID init_uuid;
  init_uuid.len = 2;
  init_uuid.uu.uuid16 = di_uuid;

  if (SDP_InitDiscoveryDb(p_db, len, num_uuids, &init_uuid, 0, NULL))
    if (SDP_ServiceSearchRequest(remote_device, p_db, p_cb))
      result = SDP_SUCCESS;

  return result;
#else
  return SDP_DI_DISC_FAILED;
#endif
}

/*******************************************************************************
 *
 * Function         SDP_GetNumDiRecords
 *
 * Description      Searches specified database for DI records
 *
 * Returns          number of DI records found
 *
 ******************************************************************************/
uint8_t SDP_GetNumDiRecords(tSDP_DISCOVERY_DB* p_db) {
#if (SDP_CLIENT_ENABLED == TRUE)
  uint8_t num_records = 0;
  tSDP_DISC_REC* p_curr_record = NULL;

  do {
    p_curr_record = SDP_FindServiceInDb(p_db, UUID_SERVCLASS_PNP_INFORMATION,
                                        p_curr_record);
    if (p_curr_record) num_records++;
  } while (p_curr_record);

  return num_records;
#else
  return 0;
#endif
}

/*******************************************************************************
 *
 * Function         SDP_AttrStringCopy
 *
 * Description      This function copy given attribute to specified buffer as a
 *                  string
 *
 * Returns          none
 *
 ******************************************************************************/
static void SDP_AttrStringCopy(char* dst, tSDP_DISC_ATTR* p_attr,
                               uint16_t dst_size) {
  if (dst == NULL) return;
  if (p_attr) {
    uint16_t len = SDP_DISC_ATTR_LEN(p_attr->attr_len_type);
    if (len > dst_size - 1) {
      len = dst_size - 1;
    }
    memcpy(dst, (char*)p_attr->attr_value.v.array, len);
    dst[len] = '\0';
  } else {
    dst[0] = '\0';
  }
}

/*******************************************************************************
 *
 * Function         SDP_GetDiRecord
 *
 * Description      This function retrieves a remote device's DI record from
 *                  the specified database.
 *
 * Returns          SDP_SUCCESS if record retrieved, else error
 *
 ******************************************************************************/
uint16_t SDP_GetDiRecord(uint8_t get_record_index,
                         tSDP_DI_GET_RECORD* p_device_info,
                         tSDP_DISCOVERY_DB* p_db) {
#if (SDP_CLIENT_ENABLED == TRUE)
  uint16_t result = SDP_NO_DI_RECORD_FOUND;
  uint8_t curr_record_index = 1;

  tSDP_DISC_REC* p_curr_record = NULL;

  /* find the requested SDP record in the discovery database */
  do {
    p_curr_record = SDP_FindServiceInDb(p_db, UUID_SERVCLASS_PNP_INFORMATION,
                                        p_curr_record);
    if (p_curr_record) {
      if (curr_record_index++ == get_record_index) {
        result = SDP_SUCCESS;
        break;
      }
    }
  } while (p_curr_record);

  if (result == SDP_SUCCESS) {
    /* copy the information from the SDP record to the DI record */
    tSDP_DISC_ATTR* p_curr_attr = NULL;

    /* ClientExecutableURL is optional */
    p_curr_attr = SDP_FindAttributeInRec(p_curr_record, ATTR_ID_CLIENT_EXE_URL);
    SDP_AttrStringCopy(p_device_info->rec.client_executable_url, p_curr_attr,
                       SDP_MAX_ATTR_LEN);

    /* Service Description is optional */
    p_curr_attr =
        SDP_FindAttributeInRec(p_curr_record, ATTR_ID_SERVICE_DESCRIPTION);
    SDP_AttrStringCopy(p_device_info->rec.service_description, p_curr_attr,
                       SDP_MAX_ATTR_LEN);

    /* DocumentationURL is optional */
    p_curr_attr =
        SDP_FindAttributeInRec(p_curr_record, ATTR_ID_DOCUMENTATION_URL);
    SDP_AttrStringCopy(p_device_info->rec.documentation_url, p_curr_attr,
                       SDP_MAX_ATTR_LEN);

    p_curr_attr =
        SDP_FindAttributeInRec(p_curr_record, ATTR_ID_SPECIFICATION_ID);
    if (p_curr_attr)
      p_device_info->spec_id = p_curr_attr->attr_value.v.u16;
    else
      result = SDP_ERR_ATTR_NOT_PRESENT;

    p_curr_attr = SDP_FindAttributeInRec(p_curr_record, ATTR_ID_VENDOR_ID);
    if (p_curr_attr)
      p_device_info->rec.vendor = p_curr_attr->attr_value.v.u16;
    else
      result = SDP_ERR_ATTR_NOT_PRESENT;

    p_curr_attr =
        SDP_FindAttributeInRec(p_curr_record, ATTR_ID_VENDOR_ID_SOURCE);
    if (p_curr_attr)
      p_device_info->rec.vendor_id_source = p_curr_attr->attr_value.v.u16;
    else
      result = SDP_ERR_ATTR_NOT_PRESENT;

    p_curr_attr = SDP_FindAttributeInRec(p_curr_record, ATTR_ID_PRODUCT_ID);
    if (p_curr_attr)
      p_device_info->rec.product = p_curr_attr->attr_value.v.u16;
    else
      result = SDP_ERR_ATTR_NOT_PRESENT;

    p_curr_attr =
        SDP_FindAttributeInRec(p_curr_record, ATTR_ID_PRODUCT_VERSION);
    if (p_curr_attr)
      p_device_info->rec.version = p_curr_attr->attr_value.v.u16;
    else
      result = SDP_ERR_ATTR_NOT_PRESENT;

    p_curr_attr = SDP_FindAttributeInRec(p_curr_record, ATTR_ID_PRIMARY_RECORD);
    if (p_curr_attr)
      p_device_info->rec.primary_record = (bool)p_curr_attr->attr_value.v.u8;
    else
      result = SDP_ERR_ATTR_NOT_PRESENT;
  }

  return result;
#else /* SDP_CLIENT_ENABLED is FALSE */
  return SDP_NO_DI_RECORD_FOUND;
#endif
}

/*******************************************************************************
 *                   Device Identification (DI) Server Functions
 ******************************************************************************/

/*******************************************************************************
 *
 * Function         SDP_SetLocalDiRecord
 *
 * Description      This function adds a DI record to the local SDP database.
 *
 *
 *
 * Returns          Returns SDP_SUCCESS if record added successfully, else error
 *
 ******************************************************************************/
uint16_t SDP_SetLocalDiRecord(tSDP_DI_RECORD* p_device_info,
                              uint32_t* p_handle) {
#if (SDP_SERVER_ENABLED == TRUE)
  uint16_t result = SDP_SUCCESS;
  uint32_t handle;
  uint16_t di_uuid = UUID_SERVCLASS_PNP_INFORMATION;
  uint16_t di_specid = BLUETOOTH_DI_SPECIFICATION;
  uint8_t temp_u16[2];
  uint8_t* p_temp;
  uint8_t u8;

  *p_handle = 0;
  if (p_device_info == NULL) return SDP_ILLEGAL_PARAMETER;

  /* if record is to be primary record, get handle to replace old primary */
  if (p_device_info->primary_record == true &&
      sdp_cb.server_db.di_primary_handle)
    handle = sdp_cb.server_db.di_primary_handle;
  else {
    handle = SDP_CreateRecord();
    if (handle == 0) return SDP_NO_RESOURCES;
  }

  *p_handle = handle;

  /* build the SDP entry */
  /* Add the UUID to the Service Class ID List */
  if ((SDP_AddServiceClassIdList(handle, 1, &di_uuid)) == false)
    result = SDP_DI_REG_FAILED;

  /* mandatory */
  if (result == SDP_SUCCESS) {
    p_temp = temp_u16;
    UINT16_TO_BE_STREAM(p_temp, di_specid);
    if (!(SDP_AddAttribute(handle, ATTR_ID_SPECIFICATION_ID, UINT_DESC_TYPE,
                           sizeof(di_specid), temp_u16)))
      result = SDP_DI_REG_FAILED;
  }

  /* optional - if string is null, do not add attribute */
  if (result == SDP_SUCCESS) {
    if (p_device_info->client_executable_url[0] != '\0') {
      if (!((strlen(p_device_info->client_executable_url) + 1 <=
             SDP_MAX_ATTR_LEN) &&
            SDP_AddAttribute(
                handle, ATTR_ID_CLIENT_EXE_URL, URL_DESC_TYPE,
                (uint32_t)(strlen(p_device_info->client_executable_url) + 1),
                (uint8_t*)p_device_info->client_executable_url)))
        result = SDP_DI_REG_FAILED;
    }
  }

  /* optional - if string is null, do not add attribute */
  if (result == SDP_SUCCESS) {
    if (p_device_info->service_description[0] != '\0') {
      if (!((strlen(p_device_info->service_description) + 1 <=
             SDP_MAX_ATTR_LEN) &&
            SDP_AddAttribute(
                handle, ATTR_ID_SERVICE_DESCRIPTION, TEXT_STR_DESC_TYPE,
                (uint32_t)(strlen(p_device_info->service_description) + 1),
                (uint8_t*)p_device_info->service_description)))
        result = SDP_DI_REG_FAILED;
    }
  }

  /* optional - if string is null, do not add attribute */
  if (result == SDP_SUCCESS) {
    if (p_device_info->documentation_url[0] != '\0') {
      if (!((strlen(p_device_info->documentation_url) + 1 <=
             SDP_MAX_ATTR_LEN) &&
            SDP_AddAttribute(
                handle, ATTR_ID_DOCUMENTATION_URL, URL_DESC_TYPE,
                (uint32_t)(strlen(p_device_info->documentation_url) + 1),
                (uint8_t*)p_device_info->documentation_url)))
        result = SDP_DI_REG_FAILED;
    }
  }

  /* mandatory */
  if (result == SDP_SUCCESS) {
    p_temp = temp_u16;
    UINT16_TO_BE_STREAM(p_temp, p_device_info->vendor);
    if (!(SDP_AddAttribute(handle, ATTR_ID_VENDOR_ID, UINT_DESC_TYPE,
                           sizeof(p_device_info->vendor), temp_u16)))
      result = SDP_DI_REG_FAILED;
  }

  /* mandatory */
  if (result == SDP_SUCCESS) {
    p_temp = temp_u16;
    UINT16_TO_BE_STREAM(p_temp, p_device_info->product);
    if (!(SDP_AddAttribute(handle, ATTR_ID_PRODUCT_ID, UINT_DESC_TYPE,
                           sizeof(p_device_info->product), temp_u16)))
      result = SDP_DI_REG_FAILED;
  }

  /* mandatory */
  if (result == SDP_SUCCESS) {
    p_temp = temp_u16;
    UINT16_TO_BE_STREAM(p_temp, p_device_info->version);
    if (!(SDP_AddAttribute(handle, ATTR_ID_PRODUCT_VERSION, UINT_DESC_TYPE,
                           sizeof(p_device_info->version), temp_u16)))
      result = SDP_DI_REG_FAILED;
  }

  /* mandatory */
  if (result == SDP_SUCCESS) {
    u8 = (uint8_t)p_device_info->primary_record;
    if (!(SDP_AddAttribute(handle, ATTR_ID_PRIMARY_RECORD, BOOLEAN_DESC_TYPE, 1,
                           &u8)))
      result = SDP_DI_REG_FAILED;
  }

  /* mandatory */
  if (result == SDP_SUCCESS) {
    p_temp = temp_u16;
    UINT16_TO_BE_STREAM(p_temp, p_device_info->vendor_id_source);
    if (!(SDP_AddAttribute(handle, ATTR_ID_VENDOR_ID_SOURCE, UINT_DESC_TYPE,
                           sizeof(p_device_info->vendor_id_source), temp_u16)))
      result = SDP_DI_REG_FAILED;
  }

  if (result != SDP_SUCCESS)
    SDP_DeleteRecord(handle);
  else if (p_device_info->primary_record == true)
    sdp_cb.server_db.di_primary_handle = handle;

  return result;
#else  /* SDP_SERVER_ENABLED is FALSE */
  return SDP_DI_REG_FAILED;
#endif /* if SDP_SERVER_ENABLED */
}

/*******************************************************************************
 *
 * Function         SDP_SetTraceLevel
 *
 * Description      This function sets the trace level for SDP. If called with
 *                  a value of 0xFF, it simply reads the current trace level.
 *
 * Returns          the new (current) trace level
 *
 ******************************************************************************/
uint8_t SDP_SetTraceLevel(uint8_t new_level) {
  if (new_level != 0xFF) sdp_cb.trace_level = new_level;

  return (sdp_cb.trace_level);
}