1/****************************************************************************** 2 * 3 * Copyright (C) 2008-2012 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 * 21 * this file contains the main GATT server attributes access request 22 * handling functions. 23 * 24 ******************************************************************************/ 25 26#include "bt_target.h" 27#include "bt_utils.h" 28 29#include "btcore/include/uuid.h" 30#include "gatt_api.h" 31#include "gatt_int.h" 32#include "osi/include/osi.h" 33 34using base::StringPrintf; 35 36#define GATTP_MAX_NUM_INC_SVR 0 37#define GATTP_MAX_CHAR_NUM 2 38#define GATTP_MAX_ATTR_NUM (GATTP_MAX_CHAR_NUM * 2 + GATTP_MAX_NUM_INC_SVR + 1) 39#define GATTP_MAX_CHAR_VALUE_SIZE 50 40 41#ifndef GATTP_ATTR_DB_SIZE 42#define GATTP_ATTR_DB_SIZE \ 43 GATT_DB_MEM_SIZE(GATTP_MAX_NUM_INC_SVR, GATTP_MAX_CHAR_NUM, \ 44 GATTP_MAX_CHAR_VALUE_SIZE) 45#endif 46 47static void gatt_request_cback(uint16_t conn_id, uint32_t trans_id, 48 uint8_t op_code, tGATTS_DATA* p_data); 49static void gatt_connect_cback(UNUSED_ATTR tGATT_IF gatt_if, 50 const RawAddress& bda, uint16_t conn_id, 51 bool connected, tGATT_DISCONN_REASON reason, 52 tBT_TRANSPORT transport); 53static void gatt_disc_res_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type, 54 tGATT_DISC_RES* p_data); 55static void gatt_disc_cmpl_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type, 56 tGATT_STATUS status); 57static void gatt_cl_op_cmpl_cback(UNUSED_ATTR uint16_t conn_id, 58 UNUSED_ATTR tGATTC_OPTYPE op, 59 UNUSED_ATTR tGATT_STATUS status, 60 UNUSED_ATTR tGATT_CL_COMPLETE* p_data); 61 62static void gatt_cl_start_config_ccc(tGATT_PROFILE_CLCB* p_clcb); 63 64static tGATT_CBACK gatt_profile_cback = {gatt_connect_cback, 65 gatt_cl_op_cmpl_cback, 66 gatt_disc_res_cback, 67 gatt_disc_cmpl_cback, 68 gatt_request_cback, 69 NULL, 70 NULL, 71 NULL, 72 NULL}; 73 74/******************************************************************************* 75 * 76 * Function gatt_profile_find_conn_id_by_bd_addr 77 * 78 * Description Find the connection ID by remote address 79 * 80 * Returns Connection ID 81 * 82 ******************************************************************************/ 83uint16_t gatt_profile_find_conn_id_by_bd_addr(const RawAddress& remote_bda) { 84 uint16_t conn_id = GATT_INVALID_CONN_ID; 85 GATT_GetConnIdIfConnected(gatt_cb.gatt_if, remote_bda, &conn_id, 86 BT_TRANSPORT_LE); 87 return conn_id; 88} 89 90/******************************************************************************* 91 * 92 * Function gatt_profile_find_clcb_by_conn_id 93 * 94 * Description find clcb by Connection ID 95 * 96 * Returns Pointer to the found link conenction control block. 97 * 98 ******************************************************************************/ 99static tGATT_PROFILE_CLCB* gatt_profile_find_clcb_by_conn_id(uint16_t conn_id) { 100 uint8_t i_clcb; 101 tGATT_PROFILE_CLCB* p_clcb = NULL; 102 103 for (i_clcb = 0, p_clcb = gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS; 104 i_clcb++, p_clcb++) { 105 if (p_clcb->in_use && p_clcb->conn_id == conn_id) return p_clcb; 106 } 107 108 return NULL; 109} 110 111/******************************************************************************* 112 * 113 * Function gatt_profile_find_clcb_by_bd_addr 114 * 115 * Description The function searches all LCBs with macthing bd address. 116 * 117 * Returns Pointer to the found link conenction control block. 118 * 119 ******************************************************************************/ 120static tGATT_PROFILE_CLCB* gatt_profile_find_clcb_by_bd_addr( 121 const RawAddress& bda, tBT_TRANSPORT transport) { 122 uint8_t i_clcb; 123 tGATT_PROFILE_CLCB* p_clcb = NULL; 124 125 for (i_clcb = 0, p_clcb = gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS; 126 i_clcb++, p_clcb++) { 127 if (p_clcb->in_use && p_clcb->transport == transport && p_clcb->connected && 128 p_clcb->bda == bda) 129 return p_clcb; 130 } 131 132 return NULL; 133} 134 135/******************************************************************************* 136 * 137 * Function gatt_profile_clcb_alloc 138 * 139 * Description The function allocates a GATT profile connection link 140 * control block 141 * 142 * Returns NULL if not found. Otherwise pointer to the connection link 143 * block. 144 * 145 ******************************************************************************/ 146tGATT_PROFILE_CLCB* gatt_profile_clcb_alloc(uint16_t conn_id, 147 const RawAddress& bda, 148 tBT_TRANSPORT tranport) { 149 uint8_t i_clcb = 0; 150 tGATT_PROFILE_CLCB* p_clcb = NULL; 151 152 for (i_clcb = 0, p_clcb = gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS; 153 i_clcb++, p_clcb++) { 154 if (!p_clcb->in_use) { 155 p_clcb->in_use = true; 156 p_clcb->conn_id = conn_id; 157 p_clcb->connected = true; 158 p_clcb->transport = tranport; 159 p_clcb->bda = bda; 160 break; 161 } 162 } 163 if (i_clcb < GATT_MAX_APPS) return p_clcb; 164 165 return NULL; 166} 167 168/******************************************************************************* 169 * 170 * Function gatt_profile_clcb_dealloc 171 * 172 * Description The function deallocates a GATT profile connection link 173 * control block 174 * 175 * Returns void 176 * 177 ******************************************************************************/ 178void gatt_profile_clcb_dealloc(tGATT_PROFILE_CLCB* p_clcb) { 179 memset(p_clcb, 0, sizeof(tGATT_PROFILE_CLCB)); 180} 181 182/******************************************************************************* 183 * 184 * Function gatt_request_cback 185 * 186 * Description GATT profile attribute access request callback. 187 * 188 * Returns void. 189 * 190 ******************************************************************************/ 191static void gatt_request_cback(uint16_t conn_id, uint32_t trans_id, 192 tGATTS_REQ_TYPE type, tGATTS_DATA* p_data) { 193 uint8_t status = GATT_INVALID_PDU; 194 tGATTS_RSP rsp_msg; 195 bool ignore = false; 196 197 memset(&rsp_msg, 0, sizeof(tGATTS_RSP)); 198 199 switch (type) { 200 case GATTS_REQ_TYPE_READ_CHARACTERISTIC: 201 case GATTS_REQ_TYPE_READ_DESCRIPTOR: 202 status = GATT_READ_NOT_PERMIT; 203 break; 204 205 case GATTS_REQ_TYPE_WRITE_CHARACTERISTIC: 206 case GATTS_REQ_TYPE_WRITE_DESCRIPTOR: 207 status = GATT_WRITE_NOT_PERMIT; 208 break; 209 210 case GATTS_REQ_TYPE_WRITE_EXEC: 211 case GATT_CMD_WRITE: 212 ignore = true; 213 VLOG(1) << StringPrintf("Ignore GATT_REQ_EXEC_WRITE/WRITE_CMD"); 214 break; 215 216 case GATTS_REQ_TYPE_MTU: 217 VLOG(1) << StringPrintf("Get MTU exchange new mtu size: %d", p_data->mtu); 218 ignore = true; 219 break; 220 221 default: 222 VLOG(1) << StringPrintf("Unknown/unexpected LE GAP ATT request: 0x%02x", 223 type); 224 break; 225 } 226 227 if (!ignore) GATTS_SendRsp(conn_id, trans_id, status, &rsp_msg); 228} 229 230/******************************************************************************* 231 * 232 * Function gatt_connect_cback 233 * 234 * Description Gatt profile connection callback. 235 * 236 * Returns void 237 * 238 ******************************************************************************/ 239static void gatt_connect_cback(UNUSED_ATTR tGATT_IF gatt_if, 240 const RawAddress& bda, uint16_t conn_id, 241 bool connected, tGATT_DISCONN_REASON reason, 242 tBT_TRANSPORT transport) { 243 VLOG(1) << __func__ << ": from " << bda 244 << StringPrintf(" connected:%d conn_id=%d reason = 0x%04x", connected, 245 conn_id, reason); 246 247 tGATT_PROFILE_CLCB* p_clcb = 248 gatt_profile_find_clcb_by_bd_addr(bda, transport); 249 if (p_clcb == NULL) return; 250 251 if (connected) { 252 p_clcb->conn_id = conn_id; 253 p_clcb->connected = true; 254 255 if (p_clcb->ccc_stage == GATT_SVC_CHANGED_CONNECTING) { 256 p_clcb->ccc_stage++; 257 gatt_cl_start_config_ccc(p_clcb); 258 } 259 } else { 260 gatt_profile_clcb_dealloc(p_clcb); 261 } 262} 263 264/******************************************************************************* 265 * 266 * Function gatt_profile_db_init 267 * 268 * Description Initializa the GATT profile attribute database. 269 * 270 ******************************************************************************/ 271void gatt_profile_db_init(void) { 272 tBT_UUID app_uuid = {LEN_UUID_128, {0}}; 273 uint16_t service_handle = 0; 274 275 /* Fill our internal UUID with a fixed pattern 0x81 */ 276 memset(&app_uuid.uu.uuid128, 0x81, LEN_UUID_128); 277 278 /* Create a GATT profile service */ 279 gatt_cb.gatt_if = GATT_Register(&app_uuid, &gatt_profile_cback); 280 GATT_StartIf(gatt_cb.gatt_if); 281 282 bt_uuid_t service_uuid; 283 uuid_128_from_16(&service_uuid, UUID_SERVCLASS_GATT_SERVER); 284 285 bt_uuid_t char_uuid; 286 uuid_128_from_16(&char_uuid, GATT_UUID_GATT_SRV_CHGD); 287 288 btgatt_db_element_t service[] = { 289 {.type = BTGATT_DB_PRIMARY_SERVICE, .uuid = service_uuid}, 290 {.type = BTGATT_DB_CHARACTERISTIC, 291 .uuid = char_uuid, 292 .properties = GATT_CHAR_PROP_BIT_INDICATE, 293 .permissions = 0}}; 294 295 GATTS_AddService(gatt_cb.gatt_if, service, 296 sizeof(service) / sizeof(btgatt_db_element_t)); 297 298 service_handle = service[0].attribute_handle; 299 gatt_cb.handle_of_h_r = service[1].attribute_handle; 300 301 LOG(ERROR) << StringPrintf("gatt_profile_db_init: gatt_if=%d", 302 gatt_cb.gatt_if); 303} 304 305/******************************************************************************* 306 * 307 * Function gatt_disc_res_cback 308 * 309 * Description Gatt profile discovery result callback 310 * 311 * Returns void 312 * 313 ******************************************************************************/ 314static void gatt_disc_res_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type, 315 tGATT_DISC_RES* p_data) { 316 tGATT_PROFILE_CLCB* p_clcb = gatt_profile_find_clcb_by_conn_id(conn_id); 317 318 if (p_clcb == NULL) return; 319 320 switch (disc_type) { 321 case GATT_DISC_SRVC_BY_UUID: /* stage 1 */ 322 p_clcb->e_handle = p_data->value.group_value.e_handle; 323 p_clcb->ccc_result++; 324 break; 325 326 case GATT_DISC_CHAR: /* stage 2 */ 327 p_clcb->s_handle = p_data->value.dclr_value.val_handle; 328 p_clcb->ccc_result++; 329 break; 330 331 case GATT_DISC_CHAR_DSCPT: /* stage 3 */ 332 if (p_data->type.uu.uuid16 == GATT_UUID_CHAR_CLIENT_CONFIG) { 333 p_clcb->s_handle = p_data->handle; 334 p_clcb->ccc_result++; 335 } 336 break; 337 } 338} 339 340/******************************************************************************* 341 * 342 * Function gatt_disc_cmpl_cback 343 * 344 * Description Gatt profile discovery complete callback 345 * 346 * Returns void 347 * 348 ******************************************************************************/ 349static void gatt_disc_cmpl_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type, 350 tGATT_STATUS status) { 351 tGATT_PROFILE_CLCB* p_clcb = gatt_profile_find_clcb_by_conn_id(conn_id); 352 353 if (p_clcb == NULL) return; 354 355 if (status == GATT_SUCCESS && p_clcb->ccc_result > 0) { 356 p_clcb->ccc_result = 0; 357 p_clcb->ccc_stage++; 358 gatt_cl_start_config_ccc(p_clcb); 359 } else { 360 LOG(ERROR) << StringPrintf( 361 "%s() - Unable to register for service changed indication", __func__); 362 } 363} 364 365/******************************************************************************* 366 * 367 * Function gatt_cl_op_cmpl_cback 368 * 369 * Description Gatt profile client operation complete callback 370 * 371 * Returns void 372 * 373 ******************************************************************************/ 374static void gatt_cl_op_cmpl_cback(UNUSED_ATTR uint16_t conn_id, 375 UNUSED_ATTR tGATTC_OPTYPE op, 376 UNUSED_ATTR tGATT_STATUS status, 377 UNUSED_ATTR tGATT_CL_COMPLETE* p_data) {} 378 379/******************************************************************************* 380 * 381 * Function gatt_cl_start_config_ccc 382 * 383 * Description Gatt profile start configure service change CCC 384 * 385 * Returns void 386 * 387 ******************************************************************************/ 388static void gatt_cl_start_config_ccc(tGATT_PROFILE_CLCB* p_clcb) { 389 tGATT_DISC_PARAM srvc_disc_param; 390 tGATT_VALUE ccc_value; 391 392 VLOG(1) << StringPrintf("%s() - stage: %d", __func__, p_clcb->ccc_stage); 393 394 memset(&srvc_disc_param, 0, sizeof(tGATT_DISC_PARAM)); 395 memset(&ccc_value, 0, sizeof(tGATT_VALUE)); 396 397 switch (p_clcb->ccc_stage) { 398 case GATT_SVC_CHANGED_SERVICE: /* discover GATT service */ 399 srvc_disc_param.s_handle = 1; 400 srvc_disc_param.e_handle = 0xffff; 401 srvc_disc_param.service.len = 2; 402 srvc_disc_param.service.uu.uuid16 = UUID_SERVCLASS_GATT_SERVER; 403 GATTC_Discover(p_clcb->conn_id, GATT_DISC_SRVC_BY_UUID, &srvc_disc_param); 404 break; 405 406 case GATT_SVC_CHANGED_CHARACTERISTIC: /* discover service change char */ 407 srvc_disc_param.s_handle = 1; 408 srvc_disc_param.e_handle = p_clcb->e_handle; 409 srvc_disc_param.service.len = 2; 410 srvc_disc_param.service.uu.uuid16 = GATT_UUID_GATT_SRV_CHGD; 411 GATTC_Discover(p_clcb->conn_id, GATT_DISC_CHAR, &srvc_disc_param); 412 break; 413 414 case GATT_SVC_CHANGED_DESCRIPTOR: /* discover service change ccc */ 415 srvc_disc_param.s_handle = p_clcb->s_handle; 416 srvc_disc_param.e_handle = p_clcb->e_handle; 417 GATTC_Discover(p_clcb->conn_id, GATT_DISC_CHAR_DSCPT, &srvc_disc_param); 418 break; 419 420 case GATT_SVC_CHANGED_CONFIGURE_CCCD: /* write ccc */ 421 ccc_value.handle = p_clcb->s_handle; 422 ccc_value.len = 2; 423 ccc_value.value[0] = GATT_CLT_CONFIG_INDICATION; 424 GATTC_Write(p_clcb->conn_id, GATT_WRITE, &ccc_value); 425 break; 426 } 427} 428 429/******************************************************************************* 430 * 431 * Function GATT_ConfigServiceChangeCCC 432 * 433 * Description Configure service change indication on remote device 434 * 435 * Returns none 436 * 437 ******************************************************************************/ 438void GATT_ConfigServiceChangeCCC(const RawAddress& remote_bda, bool enable, 439 tBT_TRANSPORT transport) { 440 tGATT_PROFILE_CLCB* p_clcb = 441 gatt_profile_find_clcb_by_bd_addr(remote_bda, transport); 442 443 if (p_clcb == NULL) 444 p_clcb = gatt_profile_clcb_alloc(0, remote_bda, transport); 445 446 if (p_clcb == NULL) return; 447 448 if (GATT_GetConnIdIfConnected(gatt_cb.gatt_if, remote_bda, &p_clcb->conn_id, 449 transport)) { 450 p_clcb->connected = true; 451 } 452 /* hold the link here */ 453 GATT_Connect(gatt_cb.gatt_if, remote_bda, true, transport, true); 454 p_clcb->ccc_stage = GATT_SVC_CHANGED_CONNECTING; 455 456 if (!p_clcb->connected) { 457 /* wait for connection */ 458 return; 459 } 460 461 p_clcb->ccc_stage++; 462 gatt_cl_start_config_ccc(p_clcb); 463} 464