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      1 /******************************************************************************
      2  *
      3  *  Copyright (C) 2009-2013 Broadcom Corporation
      4  *
      5  *  Licensed under the Apache License, Version 2.0 (the "License");
      6  *  you may not use this file except in compliance with the License.
      7  *  You may obtain a copy of the License at:
      8  *
      9  *  http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  *  Unless required by applicable law or agreed to in writing, software
     12  *  distributed under the License is distributed on an "AS IS" BASIS,
     13  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  *  See the License for the specific language governing permissions and
     15  *  limitations under the License.
     16  *
     17  ******************************************************************************/
     18 
     19 
     20 #include "gki.h"
     21 #include "bta_gattc_co.h"
     22 #include "bta_gattc_ci.h"
     23 #include "btif_util.h"
     24 
     25 #if( defined BLE_INCLUDED ) && (BLE_INCLUDED == TRUE)
     26 #if( defined BTA_GATT_INCLUDED ) && (BTA_GATT_INCLUDED == TRUE)
     27 
     28 #define GATT_CACHE_PREFIX "/data/misc/bluedroid/gatt_cache_"
     29 
     30 static FILE* sCacheFD = 0;
     31 
     32 static void getFilename(char *buffer, BD_ADDR bda)
     33 {
     34     sprintf(buffer, "%s%02x%02x%02x%02x%02x%02x", GATT_CACHE_PREFIX
     35         , bda[0], bda[1], bda[2], bda[3], bda[4], bda[5]);
     36 }
     37 
     38 static void cacheClose()
     39 {
     40     if (sCacheFD != 0)
     41     {
     42         fclose(sCacheFD);
     43         sCacheFD = 0;
     44     }
     45 }
     46 
     47 static bool cacheOpen(BD_ADDR bda, bool to_save)
     48 {
     49     char fname[255] = {0};
     50     getFilename(fname, bda);
     51 
     52     cacheClose();
     53     sCacheFD = fopen(fname, to_save ? "w" : "r");
     54 
     55     return (sCacheFD != 0);
     56 }
     57 
     58 static void cacheReset(BD_ADDR bda)
     59 {
     60     char fname[255] = {0};
     61     getFilename(fname, bda);
     62     unlink(fname);
     63 }
     64 
     65 
     66 /*****************************************************************************
     67 **  Function Declarations
     68 *****************************************************************************/
     69 
     70 /*******************************************************************************
     71 **
     72 ** Function         bta_gattc_co_cache_open
     73 **
     74 ** Description      This callout function is executed by GATTC when a GATT server
     75 **                  cache is ready to be sent.
     76 **
     77 ** Parameter        server_bda: server bd address of this cache belongs to
     78 **                  evt: call in event to be passed in when cache open is done.
     79 **                  conn_id: connection ID of this cache operation attach to.
     80 **                  to_save: open cache to save or to load.
     81 **
     82 ** Returns          void.
     83 **
     84 *******************************************************************************/
     85 void bta_gattc_co_cache_open(BD_ADDR server_bda, UINT16 evt, UINT16 conn_id, BOOLEAN to_save)
     86 {
     87     /* open NV cache and send call in */
     88     tBTA_GATT_STATUS    status = BTA_GATT_OK;
     89     if (!cacheOpen(server_bda, to_save))
     90         status = BTA_GATT_ERROR;
     91 
     92     BTIF_TRACE_DEBUG("%s() - status=%d", __FUNCTION__, status);
     93     bta_gattc_ci_cache_open(server_bda, evt, status, conn_id);
     94 }
     95 
     96 /*******************************************************************************
     97 **
     98 ** Function         bta_gattc_co_cache_load
     99 **
    100 ** Description      This callout function is executed by GATT when server cache
    101 **                  is required to load.
    102 **
    103 ** Parameter        server_bda: server bd address of this cache belongs to
    104 **                  evt: call in event to be passed in when cache save is done.
    105 **                  num_attr: number of attribute to be save.
    106 **                  attr_index: starting attribute index of the save operation.
    107 **                  conn_id: connection ID of this cache operation attach to.
    108 ** Returns
    109 **
    110 *******************************************************************************/
    111 void bta_gattc_co_cache_load(BD_ADDR server_bda, UINT16 evt, UINT16 start_index, UINT16 conn_id)
    112 {
    113     UINT16              num_attr = 0;
    114     tBTA_GATTC_NV_ATTR  attr[BTA_GATTC_NV_LOAD_MAX];
    115     tBTA_GATT_STATUS    status = BTA_GATT_ERROR;
    116 
    117     if (sCacheFD && (0 == fseek(sCacheFD, start_index * sizeof(tBTA_GATTC_NV_ATTR), SEEK_SET)))
    118     {
    119         num_attr = fread(attr, sizeof(tBTA_GATTC_NV_ATTR), BTA_GATTC_NV_LOAD_MAX, sCacheFD);
    120         status = (num_attr < BTA_GATTC_NV_LOAD_MAX ? BTA_GATT_OK : BTA_GATT_MORE);
    121     }
    122 
    123     BTIF_TRACE_DEBUG("%s() - sCacheFD=%p, start_index=%d, read=%d, status=%d",
    124         __FUNCTION__, sCacheFD, start_index, num_attr, status);
    125     bta_gattc_ci_cache_load(server_bda, evt, num_attr, attr, status, conn_id);
    126 }
    127 
    128 /*******************************************************************************
    129 **
    130 ** Function         bta_gattc_co_cache_save
    131 **
    132 ** Description      This callout function is executed by GATT when a server cache
    133 **                  is available to save.
    134 **
    135 ** Parameter        server_bda: server bd address of this cache belongs to
    136 **                  evt: call in event to be passed in when cache save is done.
    137 **                  num_attr: number of attribute to be save.
    138 **                  p_attr: pointer to the list of attributes to save.
    139 **                  attr_index: starting attribute index of the save operation.
    140 **                  conn_id: connection ID of this cache operation attach to.
    141 ** Returns
    142 **
    143 *******************************************************************************/
    144 void bta_gattc_co_cache_save (BD_ADDR server_bda, UINT16 evt, UINT16 num_attr,
    145                               tBTA_GATTC_NV_ATTR *p_attr_list, UINT16 attr_index, UINT16 conn_id)
    146 {
    147     tBTA_GATT_STATUS    status = BTA_GATT_OK;
    148     UNUSED(attr_index);
    149 
    150     if (sCacheFD != 0)
    151     {
    152         int num = fwrite(p_attr_list, sizeof(tBTA_GATTC_NV_ATTR), num_attr, sCacheFD);
    153         BTIF_TRACE_DEBUG("%s() wrote %d", __FUNCTION__, num);
    154     }
    155 
    156     bta_gattc_ci_cache_save(server_bda, evt, status, conn_id);
    157 }
    158 
    159 /*******************************************************************************
    160 **
    161 ** Function         bta_gattc_co_cache_close
    162 **
    163 ** Description      This callout function is executed by GATTC when a GATT server
    164 **                  cache is written completely.
    165 **
    166 ** Parameter        server_bda: server bd address of this cache belongs to
    167 **                  conn_id: connection ID of this cache operation attach to.
    168 **
    169 ** Returns          void.
    170 **
    171 *******************************************************************************/
    172 void bta_gattc_co_cache_close(BD_ADDR server_bda, UINT16 conn_id)
    173 {
    174     UNUSED(server_bda);
    175     UNUSED(conn_id);
    176 
    177     cacheClose();
    178 
    179     /* close NV when server cache is done saving or loading,
    180        does not need to do anything for now on Insight */
    181 
    182     BTIF_TRACE_DEBUG("%s()", __FUNCTION__);
    183 }
    184 
    185 /*******************************************************************************
    186 **
    187 ** Function         bta_gattc_co_cache_reset
    188 **
    189 ** Description      This callout function is executed by GATTC to reset cache in
    190 **                  application
    191 **
    192 ** Parameter        server_bda: server bd address of this cache belongs to
    193 **
    194 ** Returns          void.
    195 **
    196 *******************************************************************************/
    197 void bta_gattc_co_cache_reset(BD_ADDR server_bda)
    198 {
    199     BTIF_TRACE_DEBUG("%s()", __FUNCTION__);
    200     cacheReset(server_bda);
    201 }
    202 
    203 #endif
    204 #endif
    205 
    206