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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 #include "btm_int.h"
     25 
     26 #if( defined BLE_INCLUDED ) && (BLE_INCLUDED == TRUE)
     27 #if( defined BTA_GATT_INCLUDED ) && (BTA_GATT_INCLUDED == TRUE)
     28 
     29 #define GATT_CACHE_PREFIX "/data/misc/bluedroid/gatt_cache_"
     30 
     31 static FILE* sCacheFD = 0;
     32 
     33 static void getFilename(char *buffer, BD_ADDR bda)
     34 {
     35     sprintf(buffer, "%s%02x%02x%02x%02x%02x%02x", GATT_CACHE_PREFIX
     36         , bda[0], bda[1], bda[2], bda[3], bda[4], bda[5]);
     37 }
     38 
     39 static void cacheClose()
     40 {
     41     if (sCacheFD != 0)
     42     {
     43         fclose(sCacheFD);
     44         sCacheFD = 0;
     45     }
     46 }
     47 
     48 static bool cacheOpen(BD_ADDR bda, bool to_save)
     49 {
     50     char fname[255] = {0};
     51     getFilename(fname, bda);
     52 
     53     cacheClose();
     54     sCacheFD = fopen(fname, to_save ? "w" : "r");
     55 
     56     return (sCacheFD != 0);
     57 }
     58 
     59 static void cacheReset(BD_ADDR bda)
     60 {
     61     char fname[255] = {0};
     62     getFilename(fname, bda);
     63     unlink(fname);
     64 }
     65 
     66 
     67 /*****************************************************************************
     68 **  Function Declarations
     69 *****************************************************************************/
     70 
     71 /*******************************************************************************
     72 **
     73 ** Function         bta_gattc_co_cache_open
     74 **
     75 ** Description      This callout function is executed by GATTC when a GATT server
     76 **                  cache is ready to be sent.
     77 **
     78 ** Parameter        server_bda: server bd address of this cache belongs to
     79 **                  evt: call in event to be passed in when cache open is done.
     80 **                  conn_id: connection ID of this cache operation attach to.
     81 **                  to_save: open cache to save or to load.
     82 **
     83 ** Returns          void.
     84 **
     85 *******************************************************************************/
     86 void bta_gattc_co_cache_open(BD_ADDR server_bda, UINT16 evt, UINT16 conn_id, BOOLEAN to_save)
     87 {
     88     /* open NV cache and send call in */
     89     tBTA_GATT_STATUS    status = BTA_GATT_OK;
     90     if (!btm_sec_is_a_bonded_dev(server_bda) || !cacheOpen(server_bda, to_save))
     91         status = BTA_GATT_ERROR;
     92 
     93     BTIF_TRACE_DEBUG("%s() - status=%d", __FUNCTION__, status);
     94     bta_gattc_ci_cache_open(server_bda, evt, status, conn_id);
     95 }
     96 
     97 /*******************************************************************************
     98 **
     99 ** Function         bta_gattc_co_cache_load
    100 **
    101 ** Description      This callout function is executed by GATT when server cache
    102 **                  is required to load.
    103 **
    104 ** Parameter        server_bda: server bd address of this cache belongs to
    105 **                  evt: call in event to be passed in when cache save is done.
    106 **                  num_attr: number of attribute to be save.
    107 **                  attr_index: starting attribute index of the save operation.
    108 **                  conn_id: connection ID of this cache operation attach to.
    109 ** Returns
    110 **
    111 *******************************************************************************/
    112 void bta_gattc_co_cache_load(BD_ADDR server_bda, UINT16 evt, UINT16 start_index, UINT16 conn_id)
    113 {
    114     UINT16              num_attr = 0;
    115     tBTA_GATTC_NV_ATTR  attr[BTA_GATTC_NV_LOAD_MAX];
    116     tBTA_GATT_STATUS    status = BTA_GATT_ERROR;
    117 
    118     if (sCacheFD && (0 == fseek(sCacheFD, start_index * sizeof(tBTA_GATTC_NV_ATTR), SEEK_SET)))
    119     {
    120         num_attr = fread(attr, sizeof(tBTA_GATTC_NV_ATTR), BTA_GATTC_NV_LOAD_MAX, sCacheFD);
    121         status = (num_attr < BTA_GATTC_NV_LOAD_MAX ? BTA_GATT_OK : BTA_GATT_MORE);
    122     }
    123 
    124     BTIF_TRACE_DEBUG("%s() - sCacheFD=%p, start_index=%d, read=%d, status=%d",
    125         __FUNCTION__, sCacheFD, start_index, num_attr, status);
    126     bta_gattc_ci_cache_load(server_bda, evt, num_attr, attr, status, conn_id);
    127 }
    128 
    129 /*******************************************************************************
    130 **
    131 ** Function         bta_gattc_co_cache_save
    132 **
    133 ** Description      This callout function is executed by GATT when a server cache
    134 **                  is available to save.
    135 **
    136 ** Parameter        server_bda: server bd address of this cache belongs to
    137 **                  evt: call in event to be passed in when cache save is done.
    138 **                  num_attr: number of attribute to be save.
    139 **                  p_attr: pointer to the list of attributes to save.
    140 **                  attr_index: starting attribute index of the save operation.
    141 **                  conn_id: connection ID of this cache operation attach to.
    142 ** Returns
    143 **
    144 *******************************************************************************/
    145 void bta_gattc_co_cache_save (BD_ADDR server_bda, UINT16 evt, UINT16 num_attr,
    146                               tBTA_GATTC_NV_ATTR *p_attr_list, UINT16 attr_index, UINT16 conn_id)
    147 {
    148     tBTA_GATT_STATUS    status = BTA_GATT_OK;
    149     UNUSED(attr_index);
    150 
    151     if (sCacheFD != 0)
    152     {
    153         int num = fwrite(p_attr_list, sizeof(tBTA_GATTC_NV_ATTR), num_attr, sCacheFD);
    154         BTIF_TRACE_DEBUG("%s() wrote %d", __FUNCTION__, num);
    155     }
    156 
    157     bta_gattc_ci_cache_save(server_bda, evt, status, conn_id);
    158 }
    159 
    160 /*******************************************************************************
    161 **
    162 ** Function         bta_gattc_co_cache_close
    163 **
    164 ** Description      This callout function is executed by GATTC when a GATT server
    165 **                  cache is written completely.
    166 **
    167 ** Parameter        server_bda: server bd address of this cache belongs to
    168 **                  conn_id: connection ID of this cache operation attach to.
    169 **
    170 ** Returns          void.
    171 **
    172 *******************************************************************************/
    173 void bta_gattc_co_cache_close(BD_ADDR server_bda, UINT16 conn_id)
    174 {
    175     UNUSED(server_bda);
    176     UNUSED(conn_id);
    177 
    178     cacheClose();
    179 
    180     /* close NV when server cache is done saving or loading,
    181        does not need to do anything for now on Insight */
    182 
    183     BTIF_TRACE_DEBUG("%s()", __FUNCTION__);
    184 }
    185 
    186 /*******************************************************************************
    187 **
    188 ** Function         bta_gattc_co_cache_reset
    189 **
    190 ** Description      This callout function is executed by GATTC to reset cache in
    191 **                  application
    192 **
    193 ** Parameter        server_bda: server bd address of this cache belongs to
    194 **
    195 ** Returns          void.
    196 **
    197 *******************************************************************************/
    198 void bta_gattc_co_cache_reset(BD_ADDR server_bda)
    199 {
    200     BTIF_TRACE_DEBUG("%s()", __FUNCTION__);
    201     cacheReset(server_bda);
    202 }
    203 
    204 #endif
    205 #endif
    206 
    207