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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 #include <hardware/bluetooth.h>
     20 #include <hardware/bt_gatt.h>
     21 #include <stdio.h>
     22 #include <stdlib.h>
     23 #include <errno.h>
     24 #include <string.h>
     25 
     26 #define LOG_TAG "BtGatt.btif"
     27 
     28 #include "bta_api.h"
     29 #include "bta_gatt_api.h"
     30 #include "bta_jv_api.h"
     31 #include "bd.h"
     32 #include "btif_storage.h"
     33 
     34 #include "btif_common.h"
     35 #include "btif_dm.h"
     36 #include "btif_util.h"
     37 #include "btif_gatt.h"
     38 #include "btif_gatt_util.h"
     39 #include "btif_config.h"
     40 
     41 #if BTA_GATT_INCLUDED == TRUE
     42 
     43 #define GATTC_READ_VALUE_TYPE_VALUE          0x0000  /* Attribute value itself */
     44 #define GATTC_READ_VALUE_TYPE_AGG_FORMAT     0x2905  /* Characteristic Aggregate Format*/
     45 
     46 static char BASE_UUID[16] = {
     47     0xfb, 0x34, 0x9b, 0x5f, 0x80, 0x00, 0x00, 0x80,
     48     0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
     49 };
     50 
     51 extern bt_status_t btif_dm_remove_bond(const bt_bdaddr_t *bd_addr);
     52 
     53 int uuidType(unsigned char* p_uuid)
     54 {
     55     int i = 0;
     56     int match = 0;
     57     int all_zero = 1;
     58 
     59     for(i = 0; i != 16; ++i)
     60     {
     61         if (i == 12 || i == 13)
     62             continue;
     63 
     64         if (p_uuid[i] == BASE_UUID[i])
     65             ++match;
     66 
     67         if (p_uuid[i] != 0)
     68             all_zero = 0;
     69     }
     70     if (all_zero)
     71         return 0;
     72     if (match == 12)
     73         return LEN_UUID_32;
     74     if (match == 14)
     75         return LEN_UUID_16;
     76     return LEN_UUID_128;
     77 }
     78 
     79 /*******************************************************************************
     80  * BTIF -> BTA conversion functions
     81  *******************************************************************************/
     82 
     83 void btif_to_bta_uuid(tBT_UUID *p_dest, bt_uuid_t *p_src)
     84 {
     85     char *p_byte = (char*)p_src;
     86     int i = 0;
     87 
     88     p_dest->len = uuidType(p_src->uu);
     89 
     90     switch (p_dest->len)
     91     {
     92         case LEN_UUID_16:
     93             p_dest->uu.uuid16 = (p_src->uu[13] << 8) + p_src->uu[12];
     94             break;
     95 
     96         case LEN_UUID_32:
     97             p_dest->uu.uuid32  = (p_src->uu[13] <<  8) + p_src->uu[12];
     98             p_dest->uu.uuid32 += (p_src->uu[15] << 24) + (p_src->uu[14] << 16);
     99             break;
    100 
    101         case LEN_UUID_128:
    102             for(i = 0; i != 16; ++i)
    103                 p_dest->uu.uuid128[i] = p_byte[i];
    104             break;
    105 
    106         default:
    107             ALOGE("%s: Unknown UUID length %d!", __FUNCTION__, p_dest->len);
    108             break;
    109     }
    110 }
    111 
    112 void btif_to_bta_gatt_id(tBTA_GATT_ID *p_dest, btgatt_gatt_id_t *p_src)
    113 {
    114     p_dest->inst_id = p_src->inst_id;
    115     btif_to_bta_uuid(&p_dest->uuid, &p_src->uuid);
    116 }
    117 
    118 void btif_to_bta_srvc_id(tBTA_GATT_SRVC_ID *p_dest, btgatt_srvc_id_t *p_src)
    119 {
    120     p_dest->id.inst_id = p_src->id.inst_id;
    121     btif_to_bta_uuid(&p_dest->id.uuid, &p_src->id.uuid);
    122     p_dest->is_primary = p_src->is_primary;
    123 }
    124 
    125 void btif_to_bta_response(tBTA_GATTS_RSP *p_dest, btgatt_response_t* p_src)
    126 {
    127     p_dest->attr_value.auth_req = p_src->attr_value.auth_req;
    128     p_dest->attr_value.handle   = p_src->attr_value.handle;
    129     p_dest->attr_value.len      = p_src->attr_value.len;
    130     p_dest->attr_value.offset   = p_src->attr_value.offset;
    131     memcpy(p_dest->attr_value.value, p_src->attr_value.value, GATT_MAX_ATTR_LEN);
    132 }
    133 
    134 /*******************************************************************************
    135  * BTA -> BTIF conversion functions
    136  *******************************************************************************/
    137 
    138 void bta_to_btif_uuid(bt_uuid_t *p_dest, tBT_UUID *p_src)
    139 {
    140     int i = 0;
    141 
    142     if (p_src->len == LEN_UUID_16 || p_src->len == LEN_UUID_32)
    143     {
    144         for(i=0; i != 16; ++i)
    145             p_dest->uu[i] = BASE_UUID[i];
    146     }
    147 
    148     switch (p_src->len)
    149     {
    150         case 0:
    151             break;
    152 
    153         case LEN_UUID_16:
    154             p_dest->uu[12] = p_src->uu.uuid16 & 0xff;
    155             p_dest->uu[13] = (p_src->uu.uuid16 >> 8) & 0xff;
    156             break;
    157 
    158         case LEN_UUID_32:
    159             p_dest->uu[12] = p_src->uu.uuid16 & 0xff;
    160             p_dest->uu[13] = (p_src->uu.uuid16 >> 8) & 0xff;
    161             p_dest->uu[14] = (p_src->uu.uuid32 >> 16) & 0xff;
    162             p_dest->uu[15] = (p_src->uu.uuid32 >> 24) & 0xff;
    163             break;
    164 
    165         case LEN_UUID_128:
    166             for(i=0; i != 16; ++i)
    167                 p_dest->uu[i] = p_src->uu.uuid128[i];
    168             break;
    169 
    170         default:
    171             ALOGE("%s: Unknown UUID length %d!", __FUNCTION__, p_src->len);
    172             break;
    173     }
    174 }
    175 
    176 
    177 void bta_to_btif_gatt_id(btgatt_gatt_id_t *p_dest, tBTA_GATT_ID *p_src)
    178 {
    179     p_dest->inst_id = p_src->inst_id;
    180     bta_to_btif_uuid(&p_dest->uuid, &p_src->uuid);
    181 }
    182 
    183 void bta_to_btif_srvc_id(btgatt_srvc_id_t *p_dest, tBTA_GATT_SRVC_ID *p_src)
    184 {
    185     p_dest->id.inst_id = p_src->id.inst_id;
    186     bta_to_btif_uuid(&p_dest->id.uuid, &p_src->id.uuid);
    187     p_dest->is_primary = p_src->is_primary;
    188 }
    189 
    190 
    191 /*******************************************************************************
    192  * Utility functions
    193  *******************************************************************************/
    194 
    195 uint16_t get_uuid16(tBT_UUID *p_uuid)
    196 {
    197     if (p_uuid->len == LEN_UUID_16)
    198     {
    199         return p_uuid->uu.uuid16;
    200     }
    201     else if (p_uuid->len == LEN_UUID_128)
    202     {
    203         UINT16 u16;
    204         UINT8 *p = &p_uuid->uu.uuid128[LEN_UUID_128 - 4];
    205         STREAM_TO_UINT16(u16, p);
    206         return u16;
    207     }
    208     else  /* p_uuid->len == LEN_UUID_32 */
    209     {
    210         return(UINT16) p_uuid->uu.uuid32;
    211     }
    212 }
    213 
    214 uint16_t set_read_value(btgatt_read_params_t *p_dest, tBTA_GATTC_READ *p_src)
    215 {
    216     int i = 0;
    217     uint16_t descr_type = 0;
    218     uint16_t len = 0;
    219 
    220     p_dest->status = p_src->status;
    221     bta_to_btif_srvc_id(&p_dest->srvc_id, &p_src->srvc_id);
    222     bta_to_btif_gatt_id(&p_dest->char_id, &p_src->char_id);
    223     bta_to_btif_gatt_id(&p_dest->descr_id, &p_src->descr_type);
    224 
    225     descr_type = get_uuid16(&p_src->descr_type.uuid);
    226 
    227     switch (descr_type)
    228     {
    229         case GATT_UUID_CHAR_AGG_FORMAT:
    230             /* not supported */
    231             p_dest->value_type = GATTC_READ_VALUE_TYPE_AGG_FORMAT;
    232             break;
    233 
    234         default:
    235             if (( p_src->status == BTA_GATT_OK ) &&(p_src->p_value != NULL))
    236             {
    237                 ALOGI("%s unformat.len = %d ", __FUNCTION__, p_src->p_value->unformat.len);
    238                 p_dest->value.len = p_src->p_value->unformat.len;
    239                 if ( p_src->p_value->unformat.len > 0  && p_src->p_value->unformat.p_value != NULL )
    240                 {
    241                     memcpy(p_dest->value.value, p_src->p_value->unformat.p_value,
    242                            p_src->p_value->unformat.len);
    243                 }
    244                 len += p_src->p_value->unformat.len;
    245             }
    246             else
    247             {
    248                 p_dest->value.len = 0;
    249             }
    250 
    251             p_dest->value_type = GATTC_READ_VALUE_TYPE_VALUE;
    252             break;
    253     }
    254 
    255     return len;
    256 }
    257 
    258 /*******************************************************************************
    259  * Encrypted link map handling
    260  *******************************************************************************/
    261 
    262 static void btif_gatt_set_encryption_cb (BD_ADDR bd_addr, tBTA_STATUS result);
    263 
    264 static BOOLEAN btif_gatt_is_link_encrypted (BD_ADDR bd_addr)
    265 {
    266     if (bd_addr == NULL)
    267         return FALSE;
    268 
    269     return BTA_JvIsEncrypted(bd_addr);
    270 }
    271 
    272 static void btif_gatt_set_encryption_cb (BD_ADDR bd_addr, tBTA_STATUS result)
    273 {
    274     if (result != BTA_SUCCESS)
    275     {
    276         bt_bdaddr_t bda;
    277         bdcpy(bda.address, bd_addr);
    278 
    279         btif_dm_remove_bond(&bda);
    280     }
    281 }
    282 
    283 void btif_gatt_check_encrypted_link (BD_ADDR bd_addr)
    284 {
    285     char buf[100];
    286 
    287     bt_bdaddr_t bda;
    288     bdcpy(bda.address, bd_addr);
    289 
    290     if ((btif_storage_get_ble_bonding_key(&bda, BTIF_DM_LE_KEY_PENC,
    291                     buf, sizeof(btif_dm_ble_penc_keys_t)) == BT_STATUS_SUCCESS)
    292         && !btif_gatt_is_link_encrypted(bd_addr))
    293     {
    294         BTA_DmSetEncryption(bd_addr,
    295                             &btif_gatt_set_encryption_cb, BTM_BLE_SEC_ENCRYPT);
    296     }
    297 }
    298 
    299 /*******************************************************************************
    300  * Device information
    301  *******************************************************************************/
    302 
    303 BOOLEAN btif_get_device_type(BD_ADDR bd_addr, int *addr_type, int *device_type)
    304 {
    305     if (device_type == NULL || addr_type == NULL)
    306         return FALSE;
    307 
    308     bt_bdaddr_t bda;
    309     bdcpy(bda.address, bd_addr);
    310 
    311     char bd_addr_str[18] = {0};
    312     bd2str(&bda, &bd_addr_str);
    313 
    314     if (!btif_config_get_int("Remote", bd_addr_str, "DevType", device_type))
    315         return FALSE;
    316 
    317     if (!btif_config_get_int("Remote", bd_addr_str, "AddrType", addr_type))
    318         return FALSE;
    319 
    320     ALOGD("%s: Device [%s] type %d, addr. type %d", __FUNCTION__, bd_addr_str, *device_type, *addr_type);
    321     return TRUE;
    322 }
    323 
    324 #endif
    325