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 34 #define GATTP_MAX_NUM_INC_SVR 0 35 #define GATTP_MAX_CHAR_NUM 2 36 #define GATTP_MAX_ATTR_NUM (GATTP_MAX_CHAR_NUM * 2 + GATTP_MAX_NUM_INC_SVR + 1) 37 #define GATTP_MAX_CHAR_VALUE_SIZE 50 38 39 #ifndef GATTP_ATTR_DB_SIZE 40 #define GATTP_ATTR_DB_SIZE \ 41 GATT_DB_MEM_SIZE(GATTP_MAX_NUM_INC_SVR, GATTP_MAX_CHAR_NUM, \ 42 GATTP_MAX_CHAR_VALUE_SIZE) 43 #endif 44 45 static void gatt_request_cback(uint16_t conn_id, uint32_t trans_id, 46 uint8_t op_code, tGATTS_DATA* p_data); 47 static void gatt_connect_cback(UNUSED_ATTR tGATT_IF gatt_if, BD_ADDR bda, 48 uint16_t conn_id, bool connected, 49 tGATT_DISCONN_REASON reason, 50 tBT_TRANSPORT transport); 51 static void gatt_disc_res_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type, 52 tGATT_DISC_RES* p_data); 53 static void gatt_disc_cmpl_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type, 54 tGATT_STATUS status); 55 static void gatt_cl_op_cmpl_cback(UNUSED_ATTR uint16_t conn_id, 56 UNUSED_ATTR tGATTC_OPTYPE op, 57 UNUSED_ATTR tGATT_STATUS status, 58 UNUSED_ATTR tGATT_CL_COMPLETE* p_data); 59 60 static void gatt_cl_start_config_ccc(tGATT_PROFILE_CLCB* p_clcb); 61 62 static tGATT_CBACK gatt_profile_cback = {gatt_connect_cback, 63 gatt_cl_op_cmpl_cback, 64 gatt_disc_res_cback, 65 gatt_disc_cmpl_cback, 66 gatt_request_cback, 67 NULL, 68 NULL, 69 NULL, 70 NULL}; 71 72 /******************************************************************************* 73 * 74 * Function gatt_profile_find_conn_id_by_bd_addr 75 * 76 * Description Find the connection ID by remote address 77 * 78 * Returns Connection ID 79 * 80 ******************************************************************************/ 81 uint16_t gatt_profile_find_conn_id_by_bd_addr(BD_ADDR remote_bda) { 82 uint16_t conn_id = GATT_INVALID_CONN_ID; 83 GATT_GetConnIdIfConnected(gatt_cb.gatt_if, remote_bda, &conn_id, 84 BT_TRANSPORT_LE); 85 return conn_id; 86 } 87 88 /******************************************************************************* 89 * 90 * Function gatt_profile_find_clcb_by_conn_id 91 * 92 * Description find clcb by Connection ID 93 * 94 * Returns Pointer to the found link conenction control block. 95 * 96 ******************************************************************************/ 97 static tGATT_PROFILE_CLCB* gatt_profile_find_clcb_by_conn_id(uint16_t conn_id) { 98 uint8_t i_clcb; 99 tGATT_PROFILE_CLCB* p_clcb = NULL; 100 101 for (i_clcb = 0, p_clcb = gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS; 102 i_clcb++, p_clcb++) { 103 if (p_clcb->in_use && p_clcb->conn_id == conn_id) return p_clcb; 104 } 105 106 return NULL; 107 } 108 109 /******************************************************************************* 110 * 111 * Function gatt_profile_find_clcb_by_bd_addr 112 * 113 * Description The function searches all LCBs with macthing bd address. 114 * 115 * Returns Pointer to the found link conenction control block. 116 * 117 ******************************************************************************/ 118 static tGATT_PROFILE_CLCB* gatt_profile_find_clcb_by_bd_addr( 119 BD_ADDR bda, tBT_TRANSPORT transport) { 120 uint8_t i_clcb; 121 tGATT_PROFILE_CLCB* p_clcb = NULL; 122 123 for (i_clcb = 0, p_clcb = gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS; 124 i_clcb++, p_clcb++) { 125 if (p_clcb->in_use && p_clcb->transport == transport && p_clcb->connected && 126 !memcmp(p_clcb->bda, bda, BD_ADDR_LEN)) 127 return p_clcb; 128 } 129 130 return NULL; 131 } 132 133 /******************************************************************************* 134 * 135 * Function gatt_profile_clcb_alloc 136 * 137 * Description The function allocates a GATT profile connection link 138 * control block 139 * 140 * Returns NULL if not found. Otherwise pointer to the connection link 141 * block. 142 * 143 ******************************************************************************/ 144 tGATT_PROFILE_CLCB* gatt_profile_clcb_alloc(uint16_t conn_id, BD_ADDR bda, 145 tBT_TRANSPORT tranport) { 146 uint8_t i_clcb = 0; 147 tGATT_PROFILE_CLCB* p_clcb = NULL; 148 149 for (i_clcb = 0, p_clcb = gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS; 150 i_clcb++, p_clcb++) { 151 if (!p_clcb->in_use) { 152 p_clcb->in_use = true; 153 p_clcb->conn_id = conn_id; 154 p_clcb->connected = true; 155 p_clcb->transport = tranport; 156 memcpy(p_clcb->bda, bda, BD_ADDR_LEN); 157 break; 158 } 159 } 160 if (i_clcb < GATT_MAX_APPS) return p_clcb; 161 162 return NULL; 163 } 164 165 /******************************************************************************* 166 * 167 * Function gatt_profile_clcb_dealloc 168 * 169 * Description The function deallocates a GATT profile connection link 170 * control block 171 * 172 * Returns void 173 * 174 ******************************************************************************/ 175 void gatt_profile_clcb_dealloc(tGATT_PROFILE_CLCB* p_clcb) { 176 memset(p_clcb, 0, sizeof(tGATT_PROFILE_CLCB)); 177 } 178 179 /******************************************************************************* 180 * 181 * Function gatt_request_cback 182 * 183 * Description GATT profile attribute access request callback. 184 * 185 * Returns void. 186 * 187 ******************************************************************************/ 188 static void gatt_request_cback(uint16_t conn_id, uint32_t trans_id, 189 tGATTS_REQ_TYPE type, tGATTS_DATA* p_data) { 190 uint8_t status = GATT_INVALID_PDU; 191 tGATTS_RSP rsp_msg; 192 bool ignore = false; 193 194 memset(&rsp_msg, 0, sizeof(tGATTS_RSP)); 195 196 switch (type) { 197 case GATTS_REQ_TYPE_READ_CHARACTERISTIC: 198 case GATTS_REQ_TYPE_READ_DESCRIPTOR: 199 status = GATT_READ_NOT_PERMIT; 200 break; 201 202 case GATTS_REQ_TYPE_WRITE_CHARACTERISTIC: 203 case GATTS_REQ_TYPE_WRITE_DESCRIPTOR: 204 status = GATT_WRITE_NOT_PERMIT; 205 break; 206 207 case GATTS_REQ_TYPE_WRITE_EXEC: 208 case GATT_CMD_WRITE: 209 ignore = true; 210 GATT_TRACE_EVENT("Ignore GATT_REQ_EXEC_WRITE/WRITE_CMD"); 211 break; 212 213 case GATTS_REQ_TYPE_MTU: 214 GATT_TRACE_EVENT("Get MTU exchange new mtu size: %d", p_data->mtu); 215 ignore = true; 216 break; 217 218 default: 219 GATT_TRACE_EVENT("Unknown/unexpected LE GAP ATT request: 0x%02x", type); 220 break; 221 } 222 223 if (!ignore) GATTS_SendRsp(conn_id, trans_id, status, &rsp_msg); 224 } 225 226 /******************************************************************************* 227 * 228 * Function gatt_connect_cback 229 * 230 * Description Gatt profile connection callback. 231 * 232 * Returns void 233 * 234 ******************************************************************************/ 235 static void gatt_connect_cback(UNUSED_ATTR tGATT_IF gatt_if, BD_ADDR bda, 236 uint16_t conn_id, bool connected, 237 tGATT_DISCONN_REASON reason, 238 tBT_TRANSPORT transport) { 239 GATT_TRACE_EVENT("%s: from %08x%04x connected:%d conn_id=%d reason = 0x%04x", 240 __func__, 241 (bda[0] << 24) + (bda[1] << 16) + (bda[2] << 8) + bda[3], 242 (bda[4] << 8) + bda[5], connected, conn_id, reason); 243 244 tGATT_PROFILE_CLCB* p_clcb = 245 gatt_profile_find_clcb_by_bd_addr(bda, transport); 246 if (p_clcb == NULL) return; 247 248 if (connected) { 249 p_clcb->conn_id = conn_id; 250 p_clcb->connected = true; 251 252 if (p_clcb->ccc_stage == GATT_SVC_CHANGED_CONNECTING) { 253 p_clcb->ccc_stage++; 254 gatt_cl_start_config_ccc(p_clcb); 255 } 256 } else { 257 gatt_profile_clcb_dealloc(p_clcb); 258 } 259 } 260 261 /******************************************************************************* 262 * 263 * Function gatt_profile_db_init 264 * 265 * Description Initializa the GATT profile attribute database. 266 * 267 ******************************************************************************/ 268 void gatt_profile_db_init(void) { 269 tBT_UUID app_uuid = {LEN_UUID_128, {0}}; 270 uint16_t service_handle = 0; 271 272 /* Fill our internal UUID with a fixed pattern 0x81 */ 273 memset(&app_uuid.uu.uuid128, 0x81, LEN_UUID_128); 274 275 /* Create a GATT profile service */ 276 gatt_cb.gatt_if = GATT_Register(&app_uuid, &gatt_profile_cback); 277 GATT_StartIf(gatt_cb.gatt_if); 278 279 bt_uuid_t service_uuid; 280 uuid_128_from_16(&service_uuid, UUID_SERVCLASS_GATT_SERVER); 281 282 bt_uuid_t char_uuid; 283 uuid_128_from_16(&char_uuid, GATT_UUID_GATT_SRV_CHGD); 284 285 btgatt_db_element_t service[] = { 286 {.type = BTGATT_DB_PRIMARY_SERVICE, .uuid = service_uuid}, 287 {.type = BTGATT_DB_CHARACTERISTIC, 288 .uuid = char_uuid, 289 .properties = GATT_CHAR_PROP_BIT_INDICATE, 290 .permissions = 0}}; 291 292 GATTS_AddService(gatt_cb.gatt_if, service, 293 sizeof(service) / sizeof(btgatt_db_element_t)); 294 295 service_handle = service[0].attribute_handle; 296 gatt_cb.handle_of_h_r = service[1].attribute_handle; 297 298 GATT_TRACE_ERROR("gatt_profile_db_init: gatt_if=%d", gatt_cb.gatt_if); 299 } 300 301 /******************************************************************************* 302 * 303 * Function gatt_disc_res_cback 304 * 305 * Description Gatt profile discovery result callback 306 * 307 * Returns void 308 * 309 ******************************************************************************/ 310 static void gatt_disc_res_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type, 311 tGATT_DISC_RES* p_data) { 312 tGATT_PROFILE_CLCB* p_clcb = gatt_profile_find_clcb_by_conn_id(conn_id); 313 314 if (p_clcb == NULL) return; 315 316 switch (disc_type) { 317 case GATT_DISC_SRVC_BY_UUID: /* stage 1 */ 318 p_clcb->e_handle = p_data->value.group_value.e_handle; 319 p_clcb->ccc_result++; 320 break; 321 322 case GATT_DISC_CHAR: /* stage 2 */ 323 p_clcb->s_handle = p_data->value.dclr_value.val_handle; 324 p_clcb->ccc_result++; 325 break; 326 327 case GATT_DISC_CHAR_DSCPT: /* stage 3 */ 328 if (p_data->type.uu.uuid16 == GATT_UUID_CHAR_CLIENT_CONFIG) { 329 p_clcb->s_handle = p_data->handle; 330 p_clcb->ccc_result++; 331 } 332 break; 333 } 334 } 335 336 /******************************************************************************* 337 * 338 * Function gatt_disc_cmpl_cback 339 * 340 * Description Gatt profile discovery complete callback 341 * 342 * Returns void 343 * 344 ******************************************************************************/ 345 static void gatt_disc_cmpl_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type, 346 tGATT_STATUS status) { 347 tGATT_PROFILE_CLCB* p_clcb = gatt_profile_find_clcb_by_conn_id(conn_id); 348 349 if (p_clcb == NULL) return; 350 351 if (status == GATT_SUCCESS && p_clcb->ccc_result > 0) { 352 p_clcb->ccc_result = 0; 353 p_clcb->ccc_stage++; 354 gatt_cl_start_config_ccc(p_clcb); 355 } else { 356 GATT_TRACE_ERROR("%s() - Unable to register for service changed indication", 357 __func__); 358 } 359 } 360 361 /******************************************************************************* 362 * 363 * Function gatt_cl_op_cmpl_cback 364 * 365 * Description Gatt profile client operation complete callback 366 * 367 * Returns void 368 * 369 ******************************************************************************/ 370 static void gatt_cl_op_cmpl_cback(UNUSED_ATTR uint16_t conn_id, 371 UNUSED_ATTR tGATTC_OPTYPE op, 372 UNUSED_ATTR tGATT_STATUS status, 373 UNUSED_ATTR tGATT_CL_COMPLETE* p_data) {} 374 375 /******************************************************************************* 376 * 377 * Function gatt_cl_start_config_ccc 378 * 379 * Description Gatt profile start configure service change CCC 380 * 381 * Returns void 382 * 383 ******************************************************************************/ 384 static void gatt_cl_start_config_ccc(tGATT_PROFILE_CLCB* p_clcb) { 385 tGATT_DISC_PARAM srvc_disc_param; 386 tGATT_VALUE ccc_value; 387 388 GATT_TRACE_DEBUG("%s() - stage: %d", __func__, p_clcb->ccc_stage); 389 390 memset(&srvc_disc_param, 0, sizeof(tGATT_DISC_PARAM)); 391 memset(&ccc_value, 0, sizeof(tGATT_VALUE)); 392 393 switch (p_clcb->ccc_stage) { 394 case GATT_SVC_CHANGED_SERVICE: /* discover GATT service */ 395 srvc_disc_param.s_handle = 1; 396 srvc_disc_param.e_handle = 0xffff; 397 srvc_disc_param.service.len = 2; 398 srvc_disc_param.service.uu.uuid16 = UUID_SERVCLASS_GATT_SERVER; 399 GATTC_Discover(p_clcb->conn_id, GATT_DISC_SRVC_BY_UUID, &srvc_disc_param); 400 break; 401 402 case GATT_SVC_CHANGED_CHARACTERISTIC: /* discover service change char */ 403 srvc_disc_param.s_handle = 1; 404 srvc_disc_param.e_handle = p_clcb->e_handle; 405 srvc_disc_param.service.len = 2; 406 srvc_disc_param.service.uu.uuid16 = GATT_UUID_GATT_SRV_CHGD; 407 GATTC_Discover(p_clcb->conn_id, GATT_DISC_CHAR, &srvc_disc_param); 408 break; 409 410 case GATT_SVC_CHANGED_DESCRIPTOR: /* discover service change ccc */ 411 srvc_disc_param.s_handle = p_clcb->s_handle; 412 srvc_disc_param.e_handle = p_clcb->e_handle; 413 GATTC_Discover(p_clcb->conn_id, GATT_DISC_CHAR_DSCPT, &srvc_disc_param); 414 break; 415 416 case GATT_SVC_CHANGED_CONFIGURE_CCCD: /* write ccc */ 417 ccc_value.handle = p_clcb->s_handle; 418 ccc_value.len = 2; 419 ccc_value.value[0] = GATT_CLT_CONFIG_INDICATION; 420 GATTC_Write(p_clcb->conn_id, GATT_WRITE, &ccc_value); 421 break; 422 } 423 } 424 425 /******************************************************************************* 426 * 427 * Function GATT_ConfigServiceChangeCCC 428 * 429 * Description Configure service change indication on remote device 430 * 431 * Returns none 432 * 433 ******************************************************************************/ 434 void GATT_ConfigServiceChangeCCC(BD_ADDR remote_bda, bool enable, 435 tBT_TRANSPORT transport) { 436 tGATT_PROFILE_CLCB* p_clcb = 437 gatt_profile_find_clcb_by_bd_addr(remote_bda, transport); 438 439 if (p_clcb == NULL) 440 p_clcb = gatt_profile_clcb_alloc(0, remote_bda, transport); 441 442 if (p_clcb == NULL) return; 443 444 if (GATT_GetConnIdIfConnected(gatt_cb.gatt_if, remote_bda, &p_clcb->conn_id, 445 transport)) { 446 p_clcb->connected = true; 447 } 448 /* hold the link here */ 449 GATT_Connect(gatt_cb.gatt_if, remote_bda, true, transport, true); 450 p_clcb->ccc_stage = GATT_SVC_CHANGED_CONNECTING; 451 452 if (!p_clcb->connected) { 453 /* wait for connection */ 454 return; 455 } 456 457 p_clcb->ccc_stage++; 458 gatt_cl_start_config_ccc(p_clcb); 459 } 460
