btif/src/btif_gatt_util.c

   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 #define LOG_TAG "bt_btif_gatt"
  20
  21 #include "btif_gatt_util.h"
  22
  23 #include <errno.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27
  28 #include <hardware/bluetooth.h>
  29 #include <hardware/bt_gatt.h>
  30
  31 #include "bdaddr.h"
  32 #include "bta_api.h"
  33 #include "bta_gatt_api.h"
  34 #include "bta_jv_api.h"
  35 #include "btif_common.h"
  36 #include "btif_config.h"
  37 #include "btif_dm.h"
  38 #include "btif_gatt.h"
  39 #include "btif_storage.h"
  40 #include "btif_util.h"
  41 #include "bt_common.h"
  42
  43 #if BTA_GATT_INCLUDED == TRUE
  44
  45 #define GATTC_READ_VALUE_TYPE_VALUE          0x0000  /* Attribute value itself */
  46 #define GATTC_READ_VALUE_TYPE_AGG_FORMAT     0x2905  /* Characteristic Aggregate Format*/
  47
  48 static unsigned char BASE_UUID[16] = {
  49     0xfb, 0x34, 0x9b, 0x5f, 0x80, 0x00, 0x00, 0x80,
  50     0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  51 };
  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             LOG_ERROR(LOG_TAG, "%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 void btif_to_bta_uuid_mask(tBTA_DM_BLE_PF_COND_MASK *p_mask, bt_uuid_t *p_src)
 135 {
 136     char *p_byte = (char*)p_src;
 137     int i = 0;
 138
 139     switch (uuidType(p_src->uu))
 140     {
 141         case LEN_UUID_16:
 142             p_mask->uuid16_mask = (p_src->uu[13] << 8) + p_src->uu[12];
 143             break;
 144
 145         case LEN_UUID_32:
 146             p_mask->uuid32_mask = (p_src->uu[13] <<  8) + p_src->uu[12];
 147             p_mask->uuid32_mask += (p_src->uu[15] << 24) + (p_src->uu[14] << 16);
 148             break;
 149
 150         case LEN_UUID_128:
 151             for(i = 0; i != 16; ++i)
 152                 p_mask->uuid128_mask[i] = p_byte[i];
 153             break;
 154
 155         default:
 156             break;
 157     }
 158 }
 159
 160 /*******************************************************************************
 161  * BTA -> BTIF conversion functions
 162  *******************************************************************************/
 163
 164 void bta_to_btif_uuid(bt_uuid_t *p_dest, tBT_UUID *p_src)
 165 {
 166     int i = 0;
 167
 168     if (p_src->len == LEN_UUID_16 || p_src->len == LEN_UUID_32)
 169     {
 170         for(i=0; i != 16; ++i)
 171             p_dest->uu[i] = BASE_UUID[i];
 172     }
 173
 174     switch (p_src->len)
 175     {
 176         case 0:
 177             break;
 178
 179         case LEN_UUID_16:
 180             p_dest->uu[12] = p_src->uu.uuid16 & 0xff;
 181             p_dest->uu[13] = (p_src->uu.uuid16 >> 8) & 0xff;
 182             break;
 183
 184         case LEN_UUID_32:
 185             p_dest->uu[12] = p_src->uu.uuid16 & 0xff;
 186             p_dest->uu[13] = (p_src->uu.uuid16 >> 8) & 0xff;
 187             p_dest->uu[14] = (p_src->uu.uuid32 >> 16) & 0xff;
 188             p_dest->uu[15] = (p_src->uu.uuid32 >> 24) & 0xff;
 189             break;
 190
 191         case LEN_UUID_128:
 192             for(i=0; i != 16; ++i)
 193                 p_dest->uu[i] = p_src->uu.uuid128[i];
 194             break;
 195
 196         default:
 197             LOG_ERROR(LOG_TAG, "%s: Unknown UUID length %d!", __FUNCTION__, p_src->len);
 198             break;
 199     }
 200 }
 201
 202 void bta_to_btif_gatt_id(btgatt_gatt_id_t *p_dest, tBTA_GATT_ID *p_src)
 203 {
 204     p_dest->inst_id = p_src->inst_id;
 205     bta_to_btif_uuid(&p_dest->uuid, &p_src->uuid);
 206 }
 207
 208 void bta_to_btif_srvc_id(btgatt_srvc_id_t *p_dest, tBTA_GATT_SRVC_ID *p_src)
 209 {
 210     p_dest->id.inst_id = p_src->id.inst_id;
 211     bta_to_btif_uuid(&p_dest->id.uuid, &p_src->id.uuid);
 212     p_dest->is_primary = p_src->is_primary;
 213 }
 214
 215 /*******************************************************************************
 216  * Utility functions
 217  *******************************************************************************/
 218
 219 uint16_t get_uuid16(tBT_UUID *p_uuid)
 220 {
 221     if (p_uuid->len == LEN_UUID_16)
 222     {
 223         return p_uuid->uu.uuid16;
 224     }
 225     else if (p_uuid->len == LEN_UUID_128)
 226     {
 227         UINT16 u16;
 228         UINT8 *p = &p_uuid->uu.uuid128[LEN_UUID_128 - 4];
 229         STREAM_TO_UINT16(u16, p);
 230         return u16;
 231     }
 232     else  /* p_uuid->len == LEN_UUID_32 */
 233     {
 234         return(UINT16) p_uuid->uu.uuid32;
 235     }
 236 }
 237
 238 uint16_t set_read_value(btgatt_read_params_t *p_dest, tBTA_GATTC_READ *p_src)
 239 {
 240     uint16_t descr_type = 0;
 241     uint16_t len = 0;
 242
 243     p_dest->status = p_src->status;
 244     bta_to_btif_srvc_id(&p_dest->srvc_id, &p_src->srvc_id);
 245     bta_to_btif_gatt_id(&p_dest->char_id, &p_src->char_id);
 246     bta_to_btif_gatt_id(&p_dest->descr_id, &p_src->descr_type);
 247
 248     descr_type = get_uuid16(&p_src->descr_type.uuid);
 249
 250     switch (descr_type)
 251     {
 252         case GATT_UUID_CHAR_AGG_FORMAT:
 253             /* not supported */
 254             p_dest->value_type = GATTC_READ_VALUE_TYPE_AGG_FORMAT;
 255             break;
 256
 257         default:
 258             if (( p_src->status == BTA_GATT_OK ) &&(p_src->p_value != NULL))
 259             {
 260                 LOG_INFO(LOG_TAG, "%s unformat.len = %d ", __FUNCTION__, p_src->p_value->unformat.len);
 261                 p_dest->value.len = p_src->p_value->unformat.len;
 262                 if ( p_src->p_value->unformat.len > 0  && p_src->p_value->unformat.p_value != NULL )
 263                 {
 264                     memcpy(p_dest->value.value, p_src->p_value->unformat.p_value,
 265                            p_src->p_value->unformat.len);
 266                 }
 267                 len += p_src->p_value->unformat.len;
 268             }
 269             else
 270             {
 271                 p_dest->value.len = 0;
 272             }
 273
 274             p_dest->value_type = GATTC_READ_VALUE_TYPE_VALUE;
 275             break;
 276     }
 277
 278     return len;
 279 }
 280
 281 /*******************************************************************************
 282  * Encrypted link map handling
 283  *******************************************************************************/
 284
 285 static void btif_gatt_set_encryption_cb (BD_ADDR bd_addr, tBTA_TRANSPORT transport, tBTA_STATUS result);
 286
 287 static BOOLEAN btif_gatt_is_link_encrypted (BD_ADDR bd_addr)
 288 {
 289     if (bd_addr == NULL)
 290         return FALSE;
 291
 292     return BTA_JvIsEncrypted(bd_addr);
 293 }
 294
 295 static void btif_gatt_set_encryption_cb (BD_ADDR bd_addr, tBTA_TRANSPORT transport, tBTA_STATUS result)
 296 {
 297     UNUSED(bd_addr);
 298     UNUSED(transport);
 299
 300     if (result != BTA_SUCCESS && result != BTA_BUSY)
 301     {
 302         BTIF_TRACE_WARNING("%s() - Encryption failed (%d)", __FUNCTION__, result);
 303     }
 304 }
 305
 306 void btif_gatt_check_encrypted_link (BD_ADDR bd_addr, tBTA_GATT_TRANSPORT transport_link)
 307 {
 308     char buf[100];
 309
 310     bt_bdaddr_t bda;
 311     bdcpy(bda.address, bd_addr);
 312
 313 #if (!defined(BLE_DELAY_REQUEST_ENC) || (BLE_DELAY_REQUEST_ENC == FALSE))
 314     if ((btif_storage_get_ble_bonding_key(&bda, BTIF_DM_LE_KEY_PENC,
 315                     buf, sizeof(tBTM_LE_PENC_KEYS)) == BT_STATUS_SUCCESS)
 316         && !btif_gatt_is_link_encrypted(bd_addr))
 317     {
 318         BTIF_TRACE_DEBUG ("%s: transport = %d", __func__, transport_link);
 319         BTA_DmSetEncryption(bd_addr,transport_link,
 320                             &btif_gatt_set_encryption_cb, BTM_BLE_SEC_ENCRYPT);
 321     }
 322 #endif
 323 }
 324
 325 #endif
 326
 327 void btif_gatt_move_track_adv_data(btgatt_track_adv_info_t *p_dest,
 328                               btgatt_track_adv_info_t *p_src)
 329 {
 330     memset(p_dest, 0, sizeof(btgatt_track_adv_info_t));
 331
 332     memcpy(p_dest, p_src, sizeof(btgatt_track_adv_info_t));
 333
 334     if (p_src->adv_pkt_len > 0)
 335     {
 336         p_dest->p_adv_pkt_data = osi_getbuf(p_src->adv_pkt_len);
 337         memcpy(p_dest->p_adv_pkt_data, p_src->p_adv_pkt_data,
 338                p_src->adv_pkt_len);
 339         osi_freebuf_and_reset((void **)&p_src->p_adv_pkt_data);
 340     }
 341
 342     if (p_src->scan_rsp_len > 0)
 343     {
 344         p_dest->p_scan_rsp_data = osi_getbuf(p_src->scan_rsp_len);
 345         memcpy(p_dest->p_scan_rsp_data, p_src->p_scan_rsp_data,
 346                p_src->scan_rsp_len);
 347         osi_freebuf_and_reset((void **)&p_src->p_scan_rsp_data);
 348     }
 349 }
 350