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 #include "btif_config.h" 34 35 #include "btif_common.h" 36 #include "btif_dm.h" 37 #include "btif_util.h" 38 #include "btif_gatt.h" 39 #include "btif_gatt_util.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 unsigned 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 int uuidType(unsigned char* p_uuid) 52 { 53 int i = 0; 54 int match = 0; 55 int all_zero = 1; 56 57 for(i = 0; i != 16; ++i) 58 { 59 if (i == 12 || i == 13) 60 continue; 61 62 if (p_uuid[i] == BASE_UUID[i]) 63 ++match; 64 65 if (p_uuid[i] != 0) 66 all_zero = 0; 67 } 68 if (all_zero) 69 return 0; 70 if (match == 12) 71 return LEN_UUID_32; 72 if (match == 14) 73 return LEN_UUID_16; 74 return LEN_UUID_128; 75 } 76 77 /******************************************************************************* 78 * BTIF -> BTA conversion functions 79 *******************************************************************************/ 80 81 void btif_to_bta_uuid(tBT_UUID *p_dest, bt_uuid_t *p_src) 82 { 83 char *p_byte = (char*)p_src; 84 int i = 0; 85 86 p_dest->len = uuidType(p_src->uu); 87 88 switch (p_dest->len) 89 { 90 case LEN_UUID_16: 91 p_dest->uu.uuid16 = (p_src->uu[13] << 8) + p_src->uu[12]; 92 break; 93 94 case LEN_UUID_32: 95 p_dest->uu.uuid32 = (p_src->uu[13] << 8) + p_src->uu[12]; 96 p_dest->uu.uuid32 += (p_src->uu[15] << 24) + (p_src->uu[14] << 16); 97 break; 98 99 case LEN_UUID_128: 100 for(i = 0; i != 16; ++i) 101 p_dest->uu.uuid128[i] = p_byte[i]; 102 break; 103 104 default: 105 ALOGE("%s: Unknown UUID length %d!", __FUNCTION__, p_dest->len); 106 break; 107 } 108 } 109 110 void btif_to_bta_gatt_id(tBTA_GATT_ID *p_dest, btgatt_gatt_id_t *p_src) 111 { 112 p_dest->inst_id = p_src->inst_id; 113 btif_to_bta_uuid(&p_dest->uuid, &p_src->uuid); 114 } 115 116 void btif_to_bta_srvc_id(tBTA_GATT_SRVC_ID *p_dest, btgatt_srvc_id_t *p_src) 117 { 118 p_dest->id.inst_id = p_src->id.inst_id; 119 btif_to_bta_uuid(&p_dest->id.uuid, &p_src->id.uuid); 120 p_dest->is_primary = p_src->is_primary; 121 } 122 123 void btif_to_bta_response(tBTA_GATTS_RSP *p_dest, btgatt_response_t* p_src) 124 { 125 p_dest->attr_value.auth_req = p_src->attr_value.auth_req; 126 p_dest->attr_value.handle = p_src->attr_value.handle; 127 p_dest->attr_value.len = p_src->attr_value.len; 128 p_dest->attr_value.offset = p_src->attr_value.offset; 129 memcpy(p_dest->attr_value.value, p_src->attr_value.value, GATT_MAX_ATTR_LEN); 130 } 131 132 void btif_to_bta_uuid_mask(tBTA_DM_BLE_PF_COND_MASK *p_mask, bt_uuid_t *p_src) 133 { 134 char *p_byte = (char*)p_src; 135 int i = 0; 136 137 switch (uuidType(p_src->uu)) 138 { 139 case LEN_UUID_16: 140 p_mask->uuid16_mask = (p_src->uu[13] << 8) + p_src->uu[12]; 141 break; 142 143 case LEN_UUID_32: 144 p_mask->uuid32_mask = (p_src->uu[13] << 8) + p_src->uu[12]; 145 p_mask->uuid32_mask += (p_src->uu[15] << 24) + (p_src->uu[14] << 16); 146 break; 147 148 case LEN_UUID_128: 149 for(i = 0; i != 16; ++i) 150 p_mask->uuid128_mask[i] = p_byte[i]; 151 break; 152 153 default: 154 break; 155 } 156 } 157 158 /******************************************************************************* 159 * BTA -> BTIF conversion functions 160 *******************************************************************************/ 161 162 void bta_to_btif_uuid(bt_uuid_t *p_dest, tBT_UUID *p_src) 163 { 164 int i = 0; 165 166 if (p_src->len == LEN_UUID_16 || p_src->len == LEN_UUID_32) 167 { 168 for(i=0; i != 16; ++i) 169 p_dest->uu[i] = BASE_UUID[i]; 170 } 171 172 switch (p_src->len) 173 { 174 case 0: 175 break; 176 177 case LEN_UUID_16: 178 p_dest->uu[12] = p_src->uu.uuid16 & 0xff; 179 p_dest->uu[13] = (p_src->uu.uuid16 >> 8) & 0xff; 180 break; 181 182 case LEN_UUID_32: 183 p_dest->uu[12] = p_src->uu.uuid16 & 0xff; 184 p_dest->uu[13] = (p_src->uu.uuid16 >> 8) & 0xff; 185 p_dest->uu[14] = (p_src->uu.uuid32 >> 16) & 0xff; 186 p_dest->uu[15] = (p_src->uu.uuid32 >> 24) & 0xff; 187 break; 188 189 case LEN_UUID_128: 190 for(i=0; i != 16; ++i) 191 p_dest->uu[i] = p_src->uu.uuid128[i]; 192 break; 193 194 default: 195 ALOGE("%s: Unknown UUID length %d!", __FUNCTION__, p_src->len); 196 break; 197 } 198 } 199 200 201 void bta_to_btif_gatt_id(btgatt_gatt_id_t *p_dest, tBTA_GATT_ID *p_src) 202 { 203 p_dest->inst_id = p_src->inst_id; 204 bta_to_btif_uuid(&p_dest->uuid, &p_src->uuid); 205 } 206 207 void bta_to_btif_srvc_id(btgatt_srvc_id_t *p_dest, tBTA_GATT_SRVC_ID *p_src) 208 { 209 p_dest->id.inst_id = p_src->id.inst_id; 210 bta_to_btif_uuid(&p_dest->id.uuid, &p_src->id.uuid); 211 p_dest->is_primary = p_src->is_primary; 212 } 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 int i = 0; 241 uint16_t descr_type = 0; 242 uint16_t len = 0; 243 244 p_dest->status = p_src->status; 245 bta_to_btif_srvc_id(&p_dest->srvc_id, &p_src->srvc_id); 246 bta_to_btif_gatt_id(&p_dest->char_id, &p_src->char_id); 247 bta_to_btif_gatt_id(&p_dest->descr_id, &p_src->descr_type); 248 249 descr_type = get_uuid16(&p_src->descr_type.uuid); 250 251 switch (descr_type) 252 { 253 case GATT_UUID_CHAR_AGG_FORMAT: 254 /* not supported */ 255 p_dest->value_type = GATTC_READ_VALUE_TYPE_AGG_FORMAT; 256 break; 257 258 default: 259 if (( p_src->status == BTA_GATT_OK ) &&(p_src->p_value != NULL)) 260 { 261 ALOGI("%s unformat.len = %d ", __FUNCTION__, p_src->p_value->unformat.len); 262 p_dest->value.len = p_src->p_value->unformat.len; 263 if ( p_src->p_value->unformat.len > 0 && p_src->p_value->unformat.p_value != NULL ) 264 { 265 memcpy(p_dest->value.value, p_src->p_value->unformat.p_value, 266 p_src->p_value->unformat.len); 267 } 268 len += p_src->p_value->unformat.len; 269 } 270 else 271 { 272 p_dest->value.len = 0; 273 } 274 275 p_dest->value_type = GATTC_READ_VALUE_TYPE_VALUE; 276 break; 277 } 278 279 return len; 280 } 281 282 /******************************************************************************* 283 * Encrypted link map handling 284 *******************************************************************************/ 285 286 static void btif_gatt_set_encryption_cb (BD_ADDR bd_addr, tBTA_TRANSPORT transport, tBTA_STATUS result); 287 288 static BOOLEAN btif_gatt_is_link_encrypted (BD_ADDR bd_addr) 289 { 290 if (bd_addr == NULL) 291 return FALSE; 292 293 return BTA_JvIsEncrypted(bd_addr); 294 } 295 296 static void btif_gatt_set_encryption_cb (BD_ADDR bd_addr, tBTA_TRANSPORT transport, tBTA_STATUS result) 297 { 298 UNUSED(bd_addr); 299 UNUSED(transport); 300 301 if (result != BTA_SUCCESS && result != BTA_BUSY) 302 { 303 BTIF_TRACE_WARNING("%s() - Encryption failed (%d)", __FUNCTION__, result); 304 } 305 } 306 307 void btif_gatt_check_encrypted_link (BD_ADDR bd_addr) 308 { 309 char buf[100]; 310 311 bt_bdaddr_t bda; 312 bdcpy(bda.address, bd_addr); 313 int device_type = 0; 314 315 #if (!defined(BLE_DELAY_REQUEST_ENC) || (BLE_DELAY_REQUEST_ENC == FALSE)) 316 if ((btif_storage_get_ble_bonding_key(&bda, BTIF_DM_LE_KEY_PENC, 317 buf, sizeof(btif_dm_ble_penc_keys_t)) == BT_STATUS_SUCCESS) 318 && !btif_gatt_is_link_encrypted(bd_addr)) 319 { 320 tBTA_GATT_TRANSPORT transport = BTA_GATT_TRANSPORT_LE; 321 322 btif_get_device_type(bd_addr, &device_type); 323 switch(device_type) 324 { 325 case BT_DEVICE_TYPE_BREDR: 326 transport = BTA_GATT_TRANSPORT_BR_EDR; 327 break; 328 329 case BT_DEVICE_TYPE_BLE: 330 transport = BTA_GATT_TRANSPORT_LE; 331 break; 332 333 case BT_DEVICE_TYPE_DUMO: 334 transport = BTA_GATT_TRANSPORT_LE_BR_EDR; 335 break; 336 337 default: 338 BTIF_TRACE_ERROR (" GATT Encrypt :Invalid device type %d",device_type); 339 return; 340 } 341 BTA_DmSetEncryption(bd_addr,transport, 342 &btif_gatt_set_encryption_cb, BTM_BLE_SEC_ENCRYPT); 343 } 344 #endif 345 } 346 347 #endif 348
