1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_INCLUDE_BT_GATT_CLIENT_H 18 #define ANDROID_INCLUDE_BT_GATT_CLIENT_H 19 20 #include <bluetooth/uuid.h> 21 #include <raw_address.h> 22 #include <stdint.h> 23 24 #include "bt_common_types.h" 25 #include "bt_gatt_types.h" 26 27 __BEGIN_DECLS 28 29 /** 30 * Buffer sizes for maximum attribute length and maximum read/write 31 * operation buffer size. 32 */ 33 #define BTGATT_MAX_ATTR_LEN 600 34 35 /** Buffer type for unformatted reads/writes */ 36 typedef struct { 37 uint8_t value[BTGATT_MAX_ATTR_LEN]; 38 uint16_t len; 39 } btgatt_unformatted_value_t; 40 41 /** Parameters for GATT read operations */ 42 typedef struct { 43 uint16_t handle; 44 btgatt_unformatted_value_t value; 45 uint16_t value_type; 46 uint8_t status; 47 } btgatt_read_params_t; 48 49 /** Parameters for GATT write operations */ 50 typedef struct { 51 btgatt_srvc_id_t srvc_id; 52 btgatt_gatt_id_t char_id; 53 btgatt_gatt_id_t descr_id; 54 uint8_t status; 55 } btgatt_write_params_t; 56 57 /** Attribute change notification parameters */ 58 typedef struct { 59 uint8_t value[BTGATT_MAX_ATTR_LEN]; 60 RawAddress bda; 61 uint16_t handle; 62 uint16_t len; 63 uint8_t is_notify; 64 } btgatt_notify_params_t; 65 66 typedef struct { 67 RawAddress* bda1; 68 bluetooth::Uuid* uuid1; 69 uint16_t u1; 70 uint16_t u2; 71 uint16_t u3; 72 uint16_t u4; 73 uint16_t u5; 74 } btgatt_test_params_t; 75 76 /* BT GATT client error codes */ 77 typedef enum { 78 BT_GATTC_COMMAND_SUCCESS = 0, /* 0 Command succeeded */ 79 BT_GATTC_COMMAND_STARTED, /* 1 Command started OK. */ 80 BT_GATTC_COMMAND_BUSY, /* 2 Device busy with another command */ 81 BT_GATTC_COMMAND_STORED, /* 3 request is stored in control block */ 82 BT_GATTC_NO_RESOURCES, /* 4 No resources to issue command */ 83 BT_GATTC_MODE_UNSUPPORTED, /* 5 Request for 1 or more unsupported modes */ 84 BT_GATTC_ILLEGAL_VALUE, /* 6 Illegal command /parameter value */ 85 BT_GATTC_INCORRECT_STATE, /* 7 Device in wrong state for request */ 86 BT_GATTC_UNKNOWN_ADDR, /* 8 Unknown remote BD address */ 87 BT_GATTC_DEVICE_TIMEOUT, /* 9 Device timeout */ 88 BT_GATTC_INVALID_CONTROLLER_OUTPUT, /* 10 An incorrect value was received 89 from HCI */ 90 BT_GATTC_SECURITY_ERROR, /* 11 Authorization or security failure or not 91 authorized */ 92 BT_GATTC_DELAYED_ENCRYPTION_CHECK, /*12 Delayed encryption check */ 93 BT_GATTC_ERR_PROCESSING /* 12 Generic error */ 94 } btgattc_error_t; 95 96 /** BT-GATT Client callback structure. */ 97 98 /** Callback invoked in response to register_client */ 99 typedef void (*register_client_callback)(int status, int client_if, 100 const bluetooth::Uuid& app_uuid); 101 102 /** GATT open callback invoked in response to open */ 103 typedef void (*connect_callback)(int conn_id, int status, int client_if, 104 const RawAddress& bda); 105 106 /** Callback invoked in response to close */ 107 typedef void (*disconnect_callback)(int conn_id, int status, int client_if, 108 const RawAddress& bda); 109 110 /** 111 * Invoked in response to search_service when the GATT service search 112 * has been completed. 113 */ 114 typedef void (*search_complete_callback)(int conn_id, int status); 115 116 /** Callback invoked in response to (de)register_for_notification */ 117 typedef void (*register_for_notification_callback)(int conn_id, int registered, 118 int status, uint16_t handle); 119 120 /** 121 * Remote device notification callback, invoked when a remote device sends 122 * a notification or indication that a client has registered for. 123 */ 124 typedef void (*notify_callback)(int conn_id, 125 const btgatt_notify_params_t& p_data); 126 127 /** Reports result of a GATT read operation */ 128 typedef void (*read_characteristic_callback)(int conn_id, int status, 129 btgatt_read_params_t* p_data); 130 131 /** GATT write characteristic operation callback */ 132 typedef void (*write_characteristic_callback)(int conn_id, int status, 133 uint16_t handle, uint16_t len, 134 const uint8_t* value); 135 136 /** GATT execute prepared write callback */ 137 typedef void (*execute_write_callback)(int conn_id, int status); 138 139 /** Callback invoked in response to read_descriptor */ 140 typedef void (*read_descriptor_callback)(int conn_id, int status, 141 const btgatt_read_params_t& p_data); 142 143 /** Callback invoked in response to write_descriptor */ 144 typedef void (*write_descriptor_callback)(int conn_id, int status, 145 uint16_t handle, uint16_t len, 146 const uint8_t* value); 147 148 /** Callback triggered in response to read_remote_rssi */ 149 typedef void (*read_remote_rssi_callback)(int client_if, const RawAddress& bda, 150 int rssi, int status); 151 152 /** Callback invoked when the MTU for a given connection changes */ 153 typedef void (*configure_mtu_callback)(int conn_id, int status, int mtu); 154 155 /** 156 * Callback notifying an application that a remote device connection is 157 * currently congested and cannot receive any more data. An application should 158 * avoid sending more data until a further callback is received indicating the 159 * congestion status has been cleared. 160 */ 161 typedef void (*congestion_callback)(int conn_id, bool congested); 162 163 /** GATT get database callback */ 164 typedef void (*get_gatt_db_callback)(int conn_id, const btgatt_db_element_t* db, 165 int count); 166 167 /** GATT services between start_handle and end_handle were removed */ 168 typedef void (*services_removed_callback)(int conn_id, uint16_t start_handle, 169 uint16_t end_handle); 170 171 /** GATT services were added */ 172 typedef void (*services_added_callback)(int conn_id, 173 const btgatt_db_element_t& added, 174 int added_count); 175 176 /** Callback invoked when the PHY for a given connection changes */ 177 typedef void (*phy_updated_callback)(int conn_id, uint8_t tx_phy, 178 uint8_t rx_phy, uint8_t status); 179 180 /** Callback invoked when the connection parameters for a given connection 181 * changes */ 182 typedef void (*conn_updated_callback)(int conn_id, uint16_t interval, 183 uint16_t latency, uint16_t timeout, 184 uint8_t status); 185 186 /** Callback when services are changed */ 187 typedef void (*service_changed_callback)(int conn_id); 188 189 typedef struct { 190 register_client_callback register_client_cb; 191 connect_callback open_cb; 192 disconnect_callback close_cb; 193 search_complete_callback search_complete_cb; 194 register_for_notification_callback register_for_notification_cb; 195 notify_callback notify_cb; 196 read_characteristic_callback read_characteristic_cb; 197 write_characteristic_callback write_characteristic_cb; 198 read_descriptor_callback read_descriptor_cb; 199 write_descriptor_callback write_descriptor_cb; 200 execute_write_callback execute_write_cb; 201 read_remote_rssi_callback read_remote_rssi_cb; 202 configure_mtu_callback configure_mtu_cb; 203 congestion_callback congestion_cb; 204 get_gatt_db_callback get_gatt_db_cb; 205 services_removed_callback services_removed_cb; 206 services_added_callback services_added_cb; 207 phy_updated_callback phy_updated_cb; 208 conn_updated_callback conn_updated_cb; 209 service_changed_callback service_changed_cb; 210 } btgatt_client_callbacks_t; 211 212 /** Represents the standard BT-GATT client interface. */ 213 214 typedef struct { 215 /** Registers a GATT client application with the stack */ 216 bt_status_t (*register_client)(const bluetooth::Uuid& uuid, 217 bool eatt_support); 218 219 /** Unregister a client application from the stack */ 220 bt_status_t (*unregister_client)(int client_if); 221 222 /** Create a connection to a remote LE or dual-mode device */ 223 bt_status_t (*connect)(int client_if, const RawAddress& bd_addr, 224 bool is_direct, int transport, bool opportunistic, 225 int initiating_phys); 226 227 /** Disconnect a remote device or cancel a pending connection */ 228 bt_status_t (*disconnect)(int client_if, const RawAddress& bd_addr, 229 int conn_id); 230 231 /** Clear the attribute cache for a given device */ 232 bt_status_t (*refresh)(int client_if, const RawAddress& bd_addr); 233 234 /** 235 * Enumerate all GATT services on a connected device. 236 * Optionally, the results can be filtered for a given UUID. 237 */ 238 bt_status_t (*search_service)(int conn_id, 239 const bluetooth::Uuid* filter_uuid); 240 241 /** 242 * Sead "Find service by UUID" request. Used only for PTS tests. 243 */ 244 void (*btif_gattc_discover_service_by_uuid)(int conn_id, 245 const bluetooth::Uuid& uuid); 246 247 /** Read a characteristic on a remote device */ 248 bt_status_t (*read_characteristic)(int conn_id, uint16_t handle, 249 int auth_req); 250 251 /** Read a characteristic on a remote device */ 252 bt_status_t (*read_using_characteristic_uuid)(int conn_id, 253 const bluetooth::Uuid& uuid, 254 uint16_t s_handle, 255 uint16_t e_handle, 256 int auth_req); 257 258 /** Write a remote characteristic */ 259 bt_status_t (*write_characteristic)(int conn_id, uint16_t handle, 260 int write_type, int auth_req, 261 const uint8_t* value, size_t length); 262 263 /** Read the descriptor for a given characteristic */ 264 bt_status_t (*read_descriptor)(int conn_id, uint16_t handle, int auth_req); 265 266 /** Write a remote descriptor for a given characteristic */ 267 bt_status_t (*write_descriptor)(int conn_id, uint16_t handle, int auth_req, 268 const uint8_t* value, size_t length); 269 270 /** Execute a prepared write operation */ 271 bt_status_t (*execute_write)(int conn_id, int execute); 272 273 /** 274 * Register to receive notifications or indications for a given 275 * characteristic 276 */ 277 bt_status_t (*register_for_notification)(int client_if, 278 const RawAddress& bd_addr, 279 uint16_t handle); 280 281 /** Deregister a previous request for notifications/indications */ 282 bt_status_t (*deregister_for_notification)(int client_if, 283 const RawAddress& bd_addr, 284 uint16_t handle); 285 286 /** Request RSSI for a given remote device */ 287 bt_status_t (*read_remote_rssi)(int client_if, const RawAddress& bd_addr); 288 289 /** Determine the type of the remote device (LE, BR/EDR, Dual-mode) */ 290 int (*get_device_type)(const RawAddress& bd_addr); 291 292 /** Configure the MTU for a given connection */ 293 bt_status_t (*configure_mtu)(int conn_id, int mtu); 294 295 /** Request a connection parameter update */ 296 bt_status_t (*conn_parameter_update)(const RawAddress& bd_addr, 297 int min_interval, int max_interval, 298 int latency, int timeout, 299 uint16_t min_ce_len, 300 uint16_t max_ce_len); 301 302 bt_status_t (*set_preferred_phy)(const RawAddress& bd_addr, uint8_t tx_phy, 303 uint8_t rx_phy, uint16_t phy_options); 304 305 bt_status_t (*read_phy)( 306 const RawAddress& bd_addr, 307 base::Callback<void(uint8_t tx_phy, uint8_t rx_phy, uint8_t status)> cb); 308 309 /** Test mode interface */ 310 bt_status_t (*test_command)(int command, const btgatt_test_params_t& params); 311 312 /** Get gatt db content */ 313 bt_status_t (*get_gatt_db)(int conn_id); 314 315 } btgatt_client_interface_t; 316 317 __END_DECLS 318 319 #endif /* ANDROID_INCLUDE_BT_GATT_CLIENT_H */ 320