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 18 #ifndef ANDROID_INCLUDE_BT_GATT_CLIENT_H 19 #define ANDROID_INCLUDE_BT_GATT_CLIENT_H 20 21 #include <stdint.h> 22 #include "bt_gatt_types.h" 23 24 __BEGIN_DECLS 25 26 /** 27 * Buffer sizes for maximum attribute length and maximum read/write 28 * operation buffer size. 29 */ 30 #define BTGATT_MAX_ATTR_LEN 600 31 32 /** Buffer type for unformatted reads/writes */ 33 typedef struct 34 { 35 uint8_t value[BTGATT_MAX_ATTR_LEN]; 36 uint16_t len; 37 } btgatt_unformatted_value_t; 38 39 /** Parameters for GATT read operations */ 40 typedef struct 41 { 42 btgatt_srvc_id_t srvc_id; 43 btgatt_char_id_t char_id; 44 bt_uuid_t descr_id; 45 btgatt_unformatted_value_t value; 46 uint16_t value_type; 47 uint8_t status; 48 } btgatt_read_params_t; 49 50 /** Parameters for GATT write operations */ 51 typedef struct 52 { 53 btgatt_srvc_id_t srvc_id; 54 btgatt_char_id_t char_id; 55 bt_uuid_t descr_id; 56 uint8_t status; 57 } btgatt_write_params_t; 58 59 /** Attribute change notification parameters */ 60 typedef struct 61 { 62 uint8_t value[BTGATT_MAX_ATTR_LEN]; 63 bt_bdaddr_t bda; 64 btgatt_srvc_id_t srvc_id; 65 btgatt_char_id_t char_id; 66 uint16_t len; 67 uint8_t is_notify; 68 } btgatt_notify_params_t; 69 70 typedef struct 71 { 72 bt_bdaddr_t *bda1; 73 bt_uuid_t *uuid1; 74 uint16_t u1; 75 uint16_t u2; 76 uint16_t u3; 77 uint16_t u4; 78 uint16_t u5; 79 } btgatt_test_params_t; 80 81 /** BT-GATT Client callback structure. */ 82 83 /** Callback invoked in response to register_client */ 84 typedef void (*register_client_callback)(int status, int client_if, 85 bt_uuid_t *app_uuid); 86 87 /** Callback for scan results */ 88 typedef void (*scan_result_callback)(bt_bdaddr_t* bda, int rssi, uint8_t* adv_data); 89 90 /** GATT open callback invoked in response to open */ 91 typedef void (*connect_callback)(int conn_id, int status, int client_if, bt_bdaddr_t* bda); 92 93 /** Callback invoked in response to close */ 94 typedef void (*disconnect_callback)(int conn_id, int status, 95 int client_if, bt_bdaddr_t* bda); 96 97 /** 98 * Invoked in response to search_service when the GATT service search 99 * has been completed. 100 */ 101 typedef void (*search_complete_callback)(int conn_id, int status); 102 103 /** Reports GATT services on a remote device */ 104 typedef void (*search_result_callback)( int conn_id, btgatt_srvc_id_t *srvc_id); 105 106 /** GATT characteristic enumeration result callback */ 107 typedef void (*get_characteristic_callback)(int conn_id, int status, 108 btgatt_srvc_id_t *srvc_id, btgatt_char_id_t *char_id, 109 int char_prop); 110 111 /** GATT descriptor enumeration result callback */ 112 typedef void (*get_descriptor_callback)(int conn_id, int status, 113 btgatt_srvc_id_t *srvc_id, btgatt_char_id_t *char_id, 114 bt_uuid_t *descr_id); 115 116 /** GATT included service enumeration result callback */ 117 typedef void (*get_included_service_callback)(int conn_id, int status, 118 btgatt_srvc_id_t *srvc_id, btgatt_srvc_id_t *incl_srvc_id); 119 120 /** Callback invoked in response to [de]register_for_notification */ 121 typedef void (*register_for_notification_callback)(int conn_id, 122 int registered, int status, btgatt_srvc_id_t *srvc_id, 123 btgatt_char_id_t *char_id); 124 125 /** 126 * Remote device notification callback, invoked when a remote device sends 127 * a notification or indication that a client has registered for. 128 */ 129 typedef void (*notify_callback)(int conn_id, btgatt_notify_params_t *p_data); 130 131 /** Reports result of a GATT read operation */ 132 typedef void (*read_characteristic_callback)(int conn_id, int status, 133 btgatt_read_params_t *p_data); 134 135 /** GATT write characteristic operation callback */ 136 typedef void (*write_characteristic_callback)(int conn_id, int status, 137 btgatt_write_params_t *p_data); 138 139 /** GATT execute prepared write callback */ 140 typedef void (*execute_write_callback)(int conn_id, int status); 141 142 /** Callback invoked in response to read_descriptor */ 143 typedef void (*read_descriptor_callback)(int conn_id, int status, 144 btgatt_read_params_t *p_data); 145 146 /** Callback invoked in response to write_descriptor */ 147 typedef void (*write_descriptor_callback)(int conn_id, int status, 148 btgatt_write_params_t *p_data); 149 150 /** Callback triggered in response to read_remote_rssi */ 151 typedef void (*read_remote_rssi_callback)(int client_if, bt_bdaddr_t* bda, 152 int rssi, int status); 153 154 typedef struct { 155 register_client_callback register_client_cb; 156 scan_result_callback scan_result_cb; 157 connect_callback open_cb; 158 disconnect_callback close_cb; 159 search_complete_callback search_complete_cb; 160 search_result_callback search_result_cb; 161 get_characteristic_callback get_characteristic_cb; 162 get_descriptor_callback get_descriptor_cb; 163 get_included_service_callback get_included_service_cb; 164 register_for_notification_callback register_for_notification_cb; 165 notify_callback notify_cb; 166 read_characteristic_callback read_characteristic_cb; 167 write_characteristic_callback write_characteristic_cb; 168 read_descriptor_callback read_descriptor_cb; 169 write_descriptor_callback write_descriptor_cb; 170 execute_write_callback execute_write_cb; 171 read_remote_rssi_callback read_remote_rssi_cb; 172 } btgatt_client_callbacks_t; 173 174 /** Represents the standard BT-GATT client interface. */ 175 176 typedef struct { 177 /** Registers a GATT client application with the stack */ 178 bt_status_t (*register_client)( bt_uuid_t *uuid ); 179 180 /** Unregister a client application from the stack */ 181 bt_status_t (*unregister_client)(int client_if ); 182 183 /** Start or stop LE device scanning */ 184 bt_status_t (*scan)( int client_if, bool start ); 185 186 /** Create a connection to a remote LE or dual-mode device */ 187 bt_status_t (*connect)( int client_if, const bt_bdaddr_t *bd_addr, 188 bool is_direct ); 189 190 /** Disconnect a remote device or cancel a pending connection */ 191 bt_status_t (*disconnect)( int client_if, const bt_bdaddr_t *bd_addr, 192 int conn_id); 193 194 /** Clear the attribute cache for a given device */ 195 bt_status_t (*refresh)( int client_if, const bt_bdaddr_t *bd_addr ); 196 197 /** 198 * Enumerate all GATT services on a connected device. 199 * Optionally, the results can be filtered for a given UUID. 200 */ 201 bt_status_t (*search_service)(int conn_id, bt_uuid_t *filter_uuid ); 202 203 /** 204 * Enumerate included services for a given service. 205 * Set start_incl_srvc_id to NULL to get the first included service. 206 */ 207 bt_status_t (*get_included_service)( int conn_id, btgatt_srvc_id_t *srvc_id, 208 btgatt_srvc_id_t *start_incl_srvc_id); 209 210 /** 211 * Enumerate characteristics for a given service. 212 * Set start_char_id to NULL to get the first characteristic. 213 */ 214 bt_status_t (*get_characteristic)( int conn_id, 215 btgatt_srvc_id_t *srvc_id, btgatt_char_id_t *start_char_id); 216 217 /** 218 * Enumerate descriptors for a given characteristic. 219 * Set start_descr_id to NULL to get the first descriptor. 220 */ 221 bt_status_t (*get_descriptor)( int conn_id, 222 btgatt_srvc_id_t *srvc_id, btgatt_char_id_t *char_id, 223 bt_uuid_t *start_descr_id); 224 225 /** Read a characteristic on a remote device */ 226 bt_status_t (*read_characteristic)( int conn_id, 227 btgatt_srvc_id_t *srvc_id, btgatt_char_id_t *char_id, 228 int auth_req ); 229 230 /** Write a remote characteristic */ 231 bt_status_t (*write_characteristic)(int conn_id, 232 btgatt_srvc_id_t *srvc_id, btgatt_char_id_t *char_id, 233 int write_type, int len, int auth_req, 234 char* p_value); 235 236 /** Read the descriptor for a given characteristic */ 237 bt_status_t (*read_descriptor)(int conn_id, 238 btgatt_srvc_id_t *srvc_id, btgatt_char_id_t *char_id, 239 bt_uuid_t *descr_id, int auth_req); 240 241 /** Write a remote descriptor for a given characteristic */ 242 bt_status_t (*write_descriptor)( int conn_id, 243 btgatt_srvc_id_t *srvc_id, btgatt_char_id_t *char_id, 244 bt_uuid_t *descr_id, int write_type, int len, 245 int auth_req, char* p_value); 246 247 /** Execute a prepared write operation */ 248 bt_status_t (*execute_write)(int conn_id, int execute); 249 250 /** 251 * Register to receive notifications or indications for a given 252 * characteristic 253 */ 254 bt_status_t (*register_for_notification)( int client_if, 255 const bt_bdaddr_t *bd_addr, btgatt_srvc_id_t *srvc_id, 256 btgatt_char_id_t *char_id); 257 258 /** Deregister a previous request for notifications/indications */ 259 bt_status_t (*deregister_for_notification)( int client_if, 260 const bt_bdaddr_t *bd_addr, btgatt_srvc_id_t *srvc_id, 261 btgatt_char_id_t *char_id); 262 263 /** Request RSSI for a given remote device */ 264 bt_status_t (*read_remote_rssi)( int client_if, const bt_bdaddr_t *bd_addr); 265 266 /** Determine the type of the remote device (LE, BR/EDR, Dual-mode) */ 267 int (*get_device_type)( const bt_bdaddr_t *bd_addr ); 268 269 /** Test mode interface */ 270 bt_status_t (*test_command)( int command, btgatt_test_params_t* params); 271 } btgatt_client_interface_t; 272 273 __END_DECLS 274 275 #endif /* ANDROID_INCLUDE_BT_GATT_CLIENT_H */ 276
