| /****************************************************************************** |
| * |
| * Copyright 2008-2012 Broadcom Corporation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| ******************************************************************************/ |
| |
| /****************************************************************************** |
| * |
| * this file contains the main GATT server attributes access request |
| * handling functions. |
| * |
| ******************************************************************************/ |
| |
| #include "bt_target.h" |
| #include "bt_utils.h" |
| |
| #include "gatt_api.h" |
| #include "gatt_int.h" |
| #include "osi/include/osi.h" |
| |
| using base::StringPrintf; |
| using bluetooth::Uuid; |
| |
| #define GATTP_MAX_NUM_INC_SVR 0 |
| #define GATTP_MAX_CHAR_NUM 2 |
| #define GATTP_MAX_ATTR_NUM (GATTP_MAX_CHAR_NUM * 2 + GATTP_MAX_NUM_INC_SVR + 1) |
| #define GATTP_MAX_CHAR_VALUE_SIZE 50 |
| |
| #ifndef GATTP_ATTR_DB_SIZE |
| #define GATTP_ATTR_DB_SIZE \ |
| GATT_DB_MEM_SIZE(GATTP_MAX_NUM_INC_SVR, GATTP_MAX_CHAR_NUM, \ |
| GATTP_MAX_CHAR_VALUE_SIZE) |
| #endif |
| |
| static void gatt_request_cback(uint16_t conn_id, uint32_t trans_id, |
| uint8_t op_code, tGATTS_DATA* p_data); |
| static void gatt_connect_cback(UNUSED_ATTR tGATT_IF gatt_if, |
| const RawAddress& bda, uint16_t conn_id, |
| bool connected, tGATT_DISCONN_REASON reason, |
| tBT_TRANSPORT transport); |
| static void gatt_disc_res_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type, |
| tGATT_DISC_RES* p_data); |
| static void gatt_disc_cmpl_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type, |
| tGATT_STATUS status); |
| static void gatt_cl_op_cmpl_cback(UNUSED_ATTR uint16_t conn_id, |
| UNUSED_ATTR tGATTC_OPTYPE op, |
| UNUSED_ATTR tGATT_STATUS status, |
| UNUSED_ATTR tGATT_CL_COMPLETE* p_data); |
| |
| static void gatt_cl_start_config_ccc(tGATT_PROFILE_CLCB* p_clcb); |
| |
| static tGATT_CBACK gatt_profile_cback = {gatt_connect_cback, |
| gatt_cl_op_cmpl_cback, |
| gatt_disc_res_cback, |
| gatt_disc_cmpl_cback, |
| gatt_request_cback, |
| NULL, |
| NULL, |
| NULL, |
| NULL}; |
| |
| /******************************************************************************* |
| * |
| * Function gatt_profile_find_conn_id_by_bd_addr |
| * |
| * Description Find the connection ID by remote address |
| * |
| * Returns Connection ID |
| * |
| ******************************************************************************/ |
| uint16_t gatt_profile_find_conn_id_by_bd_addr(const RawAddress& remote_bda) { |
| uint16_t conn_id = GATT_INVALID_CONN_ID; |
| GATT_GetConnIdIfConnected(gatt_cb.gatt_if, remote_bda, &conn_id, |
| BT_TRANSPORT_LE); |
| if (conn_id == GATT_INVALID_CONN_ID) |
| GATT_GetConnIdIfConnected(gatt_cb.gatt_if, remote_bda, &conn_id, |
| BT_TRANSPORT_BR_EDR); |
| return conn_id; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatt_profile_find_clcb_by_conn_id |
| * |
| * Description find clcb by Connection ID |
| * |
| * Returns Pointer to the found link conenction control block. |
| * |
| ******************************************************************************/ |
| static tGATT_PROFILE_CLCB* gatt_profile_find_clcb_by_conn_id(uint16_t conn_id) { |
| uint8_t i_clcb; |
| tGATT_PROFILE_CLCB* p_clcb = NULL; |
| |
| for (i_clcb = 0, p_clcb = gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS; |
| i_clcb++, p_clcb++) { |
| if (p_clcb->in_use && p_clcb->conn_id == conn_id) return p_clcb; |
| } |
| |
| return NULL; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatt_profile_find_clcb_by_bd_addr |
| * |
| * Description The function searches all LCBs with macthing bd address. |
| * |
| * Returns Pointer to the found link conenction control block. |
| * |
| ******************************************************************************/ |
| static tGATT_PROFILE_CLCB* gatt_profile_find_clcb_by_bd_addr( |
| const RawAddress& bda, tBT_TRANSPORT transport) { |
| uint8_t i_clcb; |
| tGATT_PROFILE_CLCB* p_clcb = NULL; |
| |
| for (i_clcb = 0, p_clcb = gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS; |
| i_clcb++, p_clcb++) { |
| if (p_clcb->in_use && p_clcb->transport == transport && p_clcb->connected && |
| p_clcb->bda == bda) |
| return p_clcb; |
| } |
| |
| return NULL; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatt_profile_clcb_alloc |
| * |
| * Description The function allocates a GATT profile connection link |
| * control block |
| * |
| * Returns NULL if not found. Otherwise pointer to the connection link |
| * block. |
| * |
| ******************************************************************************/ |
| tGATT_PROFILE_CLCB* gatt_profile_clcb_alloc(uint16_t conn_id, |
| const RawAddress& bda, |
| tBT_TRANSPORT tranport) { |
| uint8_t i_clcb = 0; |
| tGATT_PROFILE_CLCB* p_clcb = NULL; |
| |
| for (i_clcb = 0, p_clcb = gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS; |
| i_clcb++, p_clcb++) { |
| if (!p_clcb->in_use) { |
| p_clcb->in_use = true; |
| p_clcb->conn_id = conn_id; |
| p_clcb->connected = true; |
| p_clcb->transport = tranport; |
| p_clcb->bda = bda; |
| break; |
| } |
| } |
| if (i_clcb < GATT_MAX_APPS) return p_clcb; |
| |
| return NULL; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatt_profile_clcb_dealloc |
| * |
| * Description The function deallocates a GATT profile connection link |
| * control block |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void gatt_profile_clcb_dealloc(tGATT_PROFILE_CLCB* p_clcb) { |
| memset(p_clcb, 0, sizeof(tGATT_PROFILE_CLCB)); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatt_request_cback |
| * |
| * Description GATT profile attribute access request callback. |
| * |
| * Returns void. |
| * |
| ******************************************************************************/ |
| static void gatt_request_cback(uint16_t conn_id, uint32_t trans_id, |
| tGATTS_REQ_TYPE type, tGATTS_DATA* p_data) { |
| uint8_t status = GATT_INVALID_PDU; |
| tGATTS_RSP rsp_msg; |
| bool ignore = false; |
| |
| memset(&rsp_msg, 0, sizeof(tGATTS_RSP)); |
| |
| switch (type) { |
| case GATTS_REQ_TYPE_READ_CHARACTERISTIC: |
| case GATTS_REQ_TYPE_READ_DESCRIPTOR: |
| status = GATT_READ_NOT_PERMIT; |
| break; |
| |
| case GATTS_REQ_TYPE_WRITE_CHARACTERISTIC: |
| case GATTS_REQ_TYPE_WRITE_DESCRIPTOR: |
| status = GATT_WRITE_NOT_PERMIT; |
| break; |
| |
| case GATTS_REQ_TYPE_WRITE_EXEC: |
| case GATT_CMD_WRITE: |
| ignore = true; |
| VLOG(1) << "Ignore GATT_REQ_EXEC_WRITE/WRITE_CMD"; |
| break; |
| |
| case GATTS_REQ_TYPE_MTU: |
| VLOG(1) << "Get MTU exchange new mtu size: " << +p_data->mtu; |
| ignore = true; |
| break; |
| |
| default: |
| VLOG(1) << "Unknown/unexpected LE GAP ATT request: " << loghex(type); |
| break; |
| } |
| |
| if (!ignore) GATTS_SendRsp(conn_id, trans_id, status, &rsp_msg); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatt_connect_cback |
| * |
| * Description Gatt profile connection callback. |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| static void gatt_connect_cback(UNUSED_ATTR tGATT_IF gatt_if, |
| const RawAddress& bda, uint16_t conn_id, |
| bool connected, tGATT_DISCONN_REASON reason, |
| tBT_TRANSPORT transport) { |
| VLOG(1) << __func__ << ": from " << bda << " connected: " << connected |
| << ", conn_id: " << loghex(conn_id) << "reason: " << loghex(reason); |
| |
| tGATT_PROFILE_CLCB* p_clcb = |
| gatt_profile_find_clcb_by_bd_addr(bda, transport); |
| if (p_clcb == NULL) return; |
| |
| if (connected) { |
| p_clcb->conn_id = conn_id; |
| p_clcb->connected = true; |
| |
| if (p_clcb->ccc_stage == GATT_SVC_CHANGED_CONNECTING) { |
| p_clcb->ccc_stage++; |
| gatt_cl_start_config_ccc(p_clcb); |
| } |
| } else { |
| gatt_profile_clcb_dealloc(p_clcb); |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatt_profile_db_init |
| * |
| * Description Initializa the GATT profile attribute database. |
| * |
| ******************************************************************************/ |
| void gatt_profile_db_init(void) { |
| uint16_t service_handle = 0; |
| |
| /* Fill our internal UUID with a fixed pattern 0x81 */ |
| std::array<uint8_t, Uuid::kNumBytes128> tmp; |
| tmp.fill(0x81); |
| |
| /* Create a GATT profile service */ |
| gatt_cb.gatt_if = GATT_Register(Uuid::From128BitBE(tmp), &gatt_profile_cback); |
| GATT_StartIf(gatt_cb.gatt_if); |
| |
| Uuid service_uuid = Uuid::From16Bit(UUID_SERVCLASS_GATT_SERVER); |
| |
| Uuid char_uuid = Uuid::From16Bit(GATT_UUID_GATT_SRV_CHGD); |
| |
| btgatt_db_element_t service[] = { |
| {.type = BTGATT_DB_PRIMARY_SERVICE, .uuid = service_uuid}, |
| {.type = BTGATT_DB_CHARACTERISTIC, |
| .uuid = char_uuid, |
| .properties = GATT_CHAR_PROP_BIT_INDICATE, |
| .permissions = 0}}; |
| |
| GATTS_AddService(gatt_cb.gatt_if, service, |
| sizeof(service) / sizeof(btgatt_db_element_t)); |
| |
| service_handle = service[0].attribute_handle; |
| gatt_cb.handle_of_h_r = service[1].attribute_handle; |
| |
| VLOG(1) << __func__ << ": gatt_if=" << +gatt_cb.gatt_if; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatt_disc_res_cback |
| * |
| * Description Gatt profile discovery result callback |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| static void gatt_disc_res_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type, |
| tGATT_DISC_RES* p_data) { |
| tGATT_PROFILE_CLCB* p_clcb = gatt_profile_find_clcb_by_conn_id(conn_id); |
| |
| if (p_clcb == NULL) return; |
| |
| switch (disc_type) { |
| case GATT_DISC_SRVC_BY_UUID: /* stage 1 */ |
| p_clcb->e_handle = p_data->value.group_value.e_handle; |
| p_clcb->ccc_result++; |
| break; |
| |
| case GATT_DISC_CHAR: /* stage 2 */ |
| p_clcb->s_handle = p_data->value.dclr_value.val_handle; |
| p_clcb->ccc_result++; |
| break; |
| |
| case GATT_DISC_CHAR_DSCPT: /* stage 3 */ |
| if (p_data->type == Uuid::From16Bit(GATT_UUID_CHAR_CLIENT_CONFIG)) { |
| p_clcb->s_handle = p_data->handle; |
| p_clcb->ccc_result++; |
| } |
| break; |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatt_disc_cmpl_cback |
| * |
| * Description Gatt profile discovery complete callback |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| static void gatt_disc_cmpl_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type, |
| tGATT_STATUS status) { |
| tGATT_PROFILE_CLCB* p_clcb = gatt_profile_find_clcb_by_conn_id(conn_id); |
| |
| if (p_clcb == NULL) return; |
| |
| if (status != GATT_SUCCESS || p_clcb->ccc_result == 0) { |
| LOG(WARNING) << __func__ |
| << ": Unable to register for service changed indication"; |
| return; |
| } |
| |
| p_clcb->ccc_result = 0; |
| p_clcb->ccc_stage++; |
| gatt_cl_start_config_ccc(p_clcb); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatt_cl_op_cmpl_cback |
| * |
| * Description Gatt profile client operation complete callback |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| static void gatt_cl_op_cmpl_cback(UNUSED_ATTR uint16_t conn_id, |
| UNUSED_ATTR tGATTC_OPTYPE op, |
| UNUSED_ATTR tGATT_STATUS status, |
| UNUSED_ATTR tGATT_CL_COMPLETE* p_data) {} |
| |
| /******************************************************************************* |
| * |
| * Function gatt_cl_start_config_ccc |
| * |
| * Description Gatt profile start configure service change CCC |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| static void gatt_cl_start_config_ccc(tGATT_PROFILE_CLCB* p_clcb) { |
| tGATT_DISC_PARAM srvc_disc_param; |
| tGATT_VALUE ccc_value; |
| |
| VLOG(1) << __func__ << ": stage: " << +p_clcb->ccc_stage; |
| |
| memset(&srvc_disc_param, 0, sizeof(tGATT_DISC_PARAM)); |
| memset(&ccc_value, 0, sizeof(tGATT_VALUE)); |
| |
| switch (p_clcb->ccc_stage) { |
| case GATT_SVC_CHANGED_SERVICE: /* discover GATT service */ |
| srvc_disc_param.s_handle = 1; |
| srvc_disc_param.e_handle = 0xffff; |
| srvc_disc_param.service = Uuid::From16Bit(UUID_SERVCLASS_GATT_SERVER); |
| GATTC_Discover(p_clcb->conn_id, GATT_DISC_SRVC_BY_UUID, &srvc_disc_param); |
| break; |
| |
| case GATT_SVC_CHANGED_CHARACTERISTIC: /* discover service change char */ |
| srvc_disc_param.s_handle = 1; |
| srvc_disc_param.e_handle = p_clcb->e_handle; |
| srvc_disc_param.service = Uuid::From16Bit(GATT_UUID_GATT_SRV_CHGD); |
| GATTC_Discover(p_clcb->conn_id, GATT_DISC_CHAR, &srvc_disc_param); |
| break; |
| |
| case GATT_SVC_CHANGED_DESCRIPTOR: /* discover service change ccc */ |
| srvc_disc_param.s_handle = p_clcb->s_handle; |
| srvc_disc_param.e_handle = p_clcb->e_handle; |
| GATTC_Discover(p_clcb->conn_id, GATT_DISC_CHAR_DSCPT, &srvc_disc_param); |
| break; |
| |
| case GATT_SVC_CHANGED_CONFIGURE_CCCD: /* write ccc */ |
| ccc_value.handle = p_clcb->s_handle; |
| ccc_value.len = 2; |
| ccc_value.value[0] = GATT_CLT_CONFIG_INDICATION; |
| GATTC_Write(p_clcb->conn_id, GATT_WRITE, &ccc_value); |
| break; |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function GATT_ConfigServiceChangeCCC |
| * |
| * Description Configure service change indication on remote device |
| * |
| * Returns none |
| * |
| ******************************************************************************/ |
| void GATT_ConfigServiceChangeCCC(const RawAddress& remote_bda, bool enable, |
| tBT_TRANSPORT transport) { |
| tGATT_PROFILE_CLCB* p_clcb = |
| gatt_profile_find_clcb_by_bd_addr(remote_bda, transport); |
| |
| if (p_clcb == NULL) |
| p_clcb = gatt_profile_clcb_alloc(0, remote_bda, transport); |
| |
| if (p_clcb == NULL) return; |
| |
| if (GATT_GetConnIdIfConnected(gatt_cb.gatt_if, remote_bda, &p_clcb->conn_id, |
| transport)) { |
| p_clcb->connected = true; |
| } |
| /* hold the link here */ |
| GATT_Connect(gatt_cb.gatt_if, remote_bda, true, transport, true); |
| p_clcb->ccc_stage = GATT_SVC_CHANGED_CONNECTING; |
| |
| if (!p_clcb->connected) { |
| /* wait for connection */ |
| return; |
| } |
| |
| p_clcb->ccc_stage++; |
| gatt_cl_start_config_ccc(p_clcb); |
| } |
