1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 39 // ***************************************************************************** 40 /* EXAMPLE_START(gap_le_advertisements): GAP LE Advertisements Dumper 41 * 42 * @text This example shows how to scan and parse advertisements. 43 * 44 */ 45 // ***************************************************************************** 46 47 48 #include <stdint.h> 49 #include <inttypes.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 54 #include "btstack.h" 55 56 static btstack_packet_callback_registration_t hci_event_callback_registration; 57 58 /* @section GAP LE setup for receiving advertisements 59 * 60 * @text GAP LE advertisements are received as custom HCI events of the 61 * GAP_EVENT_ADVERTISING_REPORT type. To receive them, you'll need to register 62 * the HCI packet handler, as shown in Listing GAPLEAdvSetup. 63 */ 64 65 /* LISTING_START(GAPLEAdvSetup): Setting up GAP LE client for receiving advertisements */ 66 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 67 68 static void gap_le_advertisements_setup(void){ 69 hci_event_callback_registration.callback = &packet_handler; 70 hci_add_event_handler(&hci_event_callback_registration); 71 } 72 73 /* LISTING_END */ 74 75 /* @section GAP LE Advertising Data Dumper 76 * 77 * @text Here, we use the definition of advertising data types and flags as specified in 78 * [Assigned Numbers GAP](https://www.bluetooth.org/en-us/specification/assigned-numbers/generic-access-profile) 79 * and [Supplement to the Bluetooth Core Specification, v4](https://www.bluetooth.org/DocMan/handlers/DownloadDoc.ashx?doc_id=282152). 80 */ 81 82 /* LISTING_START(GAPLEAdvDataTypesAndFlags): Advertising data types and flags */ 83 static char * ad_types[] = { 84 "", 85 "Flags", 86 "Incomplete List of 16-bit Service Class UUIDs", 87 "Complete List of 16-bit Service Class UUIDs", 88 "Incomplete List of 32-bit Service Class UUIDs", 89 "Complete List of 32-bit Service Class UUIDs", 90 "Incomplete List of 128-bit Service Class UUIDs", 91 "Complete List of 128-bit Service Class UUIDs", 92 "Shortened Local Name", 93 "Complete Local Name", 94 "Tx Power Level", 95 "", 96 "", 97 "Class of Device", 98 "Simple Pairing Hash C", 99 "Simple Pairing Randomizer R", 100 "Device ID", 101 "Security Manager TK Value", 102 "Slave Connection Interval Range", 103 "", 104 "List of 16-bit Service Solicitation UUIDs", 105 "List of 128-bit Service Solicitation UUIDs", 106 "Service Data", 107 "Public Target Address", 108 "Random Target Address", 109 "Appearance", 110 "Advertising Interval" 111 }; 112 113 static char * flags[] = { 114 "LE Limited Discoverable Mode", 115 "LE General Discoverable Mode", 116 "BR/EDR Not Supported", 117 "Simultaneous LE and BR/EDR to Same Device Capable (Controller)", 118 "Simultaneous LE and BR/EDR to Same Device Capable (Host)", 119 "Reserved", 120 "Reserved", 121 "Reserved" 122 }; 123 /* LISTING_END */ 124 125 /* @text BTstack offers an iterator for parsing sequence of advertising data (AD) structures, 126 * see [BLE advertisements parser API](../appendix/apis/#ble-advertisements-parser-api). 127 * After initializing the iterator, each AD structure is dumped according to its type. 128 */ 129 130 /* LISTING_START(GAPLEAdvDataParsing): Parsing advertising data */ 131 static void dump_advertisement_data(const uint8_t * adv_data, uint8_t adv_size){ 132 ad_context_t context; 133 bd_addr_t address; 134 uint8_t uuid_128[16]; 135 for (ad_iterator_init(&context, adv_size, (uint8_t *)adv_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 136 uint8_t data_type = ad_iterator_get_data_type(&context); 137 uint8_t size = ad_iterator_get_data_len(&context); 138 const uint8_t * data = ad_iterator_get_data(&context); 139 140 if (data_type > 0 && data_type < 0x1B){ 141 printf(" %s: ", ad_types[data_type]); 142 } 143 int i; 144 // Assigned Numbers GAP 145 146 switch (data_type){ 147 case BLUETOOTH_DATA_TYPE_FLAGS: 148 // show only first octet, ignore rest 149 for (i=0; i<8;i++){ 150 if (data[0] & (1<<i)){ 151 printf("%s; ", flags[i]); 152 } 153 154 } 155 break; 156 case BLUETOOTH_DATA_TYPE_INCOMPLETE_LIST_OF_16_BIT_SERVICE_CLASS_UUIDS: 157 case BLUETOOTH_DATA_TYPE_COMPLETE_LIST_OF_16_BIT_SERVICE_CLASS_UUIDS: 158 case BLUETOOTH_DATA_TYPE_LIST_OF_16_BIT_SERVICE_SOLICITATION_UUIDS: 159 for (i=0; i<size;i+=2){ 160 printf("%02X ", little_endian_read_16(data, i)); 161 } 162 break; 163 case BLUETOOTH_DATA_TYPE_INCOMPLETE_LIST_OF_32_BIT_SERVICE_CLASS_UUIDS: 164 case BLUETOOTH_DATA_TYPE_COMPLETE_LIST_OF_32_BIT_SERVICE_CLASS_UUIDS: 165 case BLUETOOTH_DATA_TYPE_LIST_OF_32_BIT_SERVICE_SOLICITATION_UUIDS: 166 for (i=0; i<size;i+=4){ 167 printf("%04"PRIX32, little_endian_read_32(data, i)); 168 } 169 break; 170 case BLUETOOTH_DATA_TYPE_INCOMPLETE_LIST_OF_128_BIT_SERVICE_CLASS_UUIDS: 171 case BLUETOOTH_DATA_TYPE_COMPLETE_LIST_OF_128_BIT_SERVICE_CLASS_UUIDS: 172 case BLUETOOTH_DATA_TYPE_LIST_OF_128_BIT_SERVICE_SOLICITATION_UUIDS: 173 reverse_128(data, uuid_128); 174 printf("%s", uuid128_to_str(uuid_128)); 175 break; 176 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 177 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 178 for (i=0; i<size;i++){ 179 printf("%c", (char)(data[i])); 180 } 181 break; 182 case BLUETOOTH_DATA_TYPE_TX_POWER_LEVEL: 183 printf("%d dBm", *(int8_t*)data); 184 break; 185 case BLUETOOTH_DATA_TYPE_SLAVE_CONNECTION_INTERVAL_RANGE: 186 printf("Connection Interval Min = %u ms, Max = %u ms", little_endian_read_16(data, 0) * 5/4, little_endian_read_16(data, 2) * 5/4); 187 break; 188 case BLUETOOTH_DATA_TYPE_SERVICE_DATA: 189 printf_hexdump(data, size); 190 break; 191 case BLUETOOTH_DATA_TYPE_PUBLIC_TARGET_ADDRESS: 192 case BLUETOOTH_DATA_TYPE_RANDOM_TARGET_ADDRESS: 193 reverse_bd_addr(data, address); 194 printf("%s", bd_addr_to_str(address)); 195 break; 196 case BLUETOOTH_DATA_TYPE_APPEARANCE: 197 // https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.gap.appearance.xml 198 printf("%02X", little_endian_read_16(data, 0) ); 199 break; 200 case BLUETOOTH_DATA_TYPE_ADVERTISING_INTERVAL: 201 printf("%u ms", little_endian_read_16(data, 0) * 5/8 ); 202 break; 203 case BLUETOOTH_DATA_TYPE_3D_INFORMATION_DATA: 204 printf_hexdump(data, size); 205 break; 206 case BLUETOOTH_DATA_TYPE_MANUFACTURER_SPECIFIC_DATA: // Manufacturer Specific Data 207 break; 208 case BLUETOOTH_DATA_TYPE_CLASS_OF_DEVICE: 209 case BLUETOOTH_DATA_TYPE_SIMPLE_PAIRING_HASH_C: 210 case BLUETOOTH_DATA_TYPE_SIMPLE_PAIRING_RANDOMIZER_R: 211 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 212 case BLUETOOTH_DATA_TYPE_SECURITY_MANAGER_OUT_OF_BAND_FLAGS: 213 default: 214 printf("Advertising Data Type 0x%2x not handled yet", data_type); 215 break; 216 } 217 printf("\n"); 218 } 219 printf("\n"); 220 } 221 /* LISTING_END */ 222 223 /* @section HCI packet handler 224 * 225 * @text The HCI packet handler has to start the scanning, 226 * and to handle received advertisements. Advertisements are received 227 * as HCI event packets of the GAP_EVENT_ADVERTISING_REPORT type, 228 * see Listing GAPLEAdvPacketHandler. 229 */ 230 231 /* LISTING_START(GAPLEAdvPacketHandler): Scanning and receiving advertisements */ 232 233 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 234 UNUSED(channel); 235 UNUSED(size); 236 237 if (packet_type != HCI_EVENT_PACKET) return; 238 239 switch (hci_event_packet_get_type(packet)) { 240 case BTSTACK_EVENT_STATE: 241 // BTstack activated, get started 242 if (btstack_event_state_get_state(packet) == HCI_STATE_WORKING){ 243 printf("Start scaning!\n"); 244 gap_set_scan_parameters(0,0x0030, 0x0030); 245 gap_start_scan(); 246 } 247 break; 248 case GAP_EVENT_ADVERTISING_REPORT:{ 249 bd_addr_t address; 250 gap_event_advertising_report_get_address(packet, address); 251 uint8_t event_type = gap_event_advertising_report_get_advertising_event_type(packet); 252 uint8_t address_type = gap_event_advertising_report_get_address_type(packet); 253 int8_t rssi = gap_event_advertising_report_get_rssi(packet); 254 uint8_t length = gap_event_advertising_report_get_data_length(packet); 255 const uint8_t * data = gap_event_advertising_report_get_data(packet); 256 257 printf("Advertisement event: evt-type %u, addr-type %u, addr %s, rssi %d, data[%u] ", event_type, 258 address_type, bd_addr_to_str(address), rssi, length); 259 printf_hexdump(data, length); 260 dump_advertisement_data(data, length); 261 break; 262 } 263 default: 264 break; 265 } 266 } 267 /* LISTING_END */ 268 269 int btstack_main(void); 270 int btstack_main(void) 271 { 272 gap_le_advertisements_setup(); 273 274 // turn on! 275 hci_power_control(HCI_POWER_ON); 276 277 return 0; 278 } 279 280 /* EXAMPLE_END */