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 #define __BTSTACK_FILE__ "panu_demo.c" 39 40 /* 41 * panu_demo.c 42 * Author: Ole Reinhardt <[email protected]> 43 */ 44 45 /* EXAMPLE_START(panu_demo): PANU Demo 46 * 47 * @text This example implements both a PANU client and a server. In server mode, it 48 * sets up a BNEP server and registers a PANU SDP record and waits for incoming connections. 49 * In client mode, it connects to a remote device, does an SDP Query to identify the PANU 50 * service and initiates a BNEP connection. 51 * 52 * Note: currently supported only on Linux and Mac. 53 */ 54 55 #include <stdio.h> 56 57 #include "btstack_config.h" 58 #include "btstack.h" 59 60 static int record_id = -1; 61 static uint16_t bnep_l2cap_psm = 0; 62 static uint32_t bnep_remote_uuid = 0; 63 static uint16_t bnep_version = 0; 64 static uint16_t bnep_cid = 0; 65 66 static uint16_t sdp_bnep_l2cap_psm = 0; 67 static uint16_t sdp_bnep_version = 0; 68 static uint32_t sdp_bnep_remote_uuid = 0; 69 70 static uint8_t attribute_value[1000]; 71 static const unsigned int attribute_value_buffer_size = sizeof(attribute_value); 72 73 // MBP 2016 74 static const char * remote_addr_string = "F4-0F-24-3B-1B-E1"; 75 // Wiko Sunny static const char * remote_addr_string = "A0:4C:5B:0F:B2:42"; 76 77 static bd_addr_t remote_addr; 78 79 static btstack_packet_callback_registration_t hci_event_callback_registration; 80 81 // outgoing network packet 82 static const uint8_t * network_buffer; 83 static uint16_t network_buffer_len; 84 85 /* @section Main application configuration 86 * 87 * @text In the application configuration, L2CAP and BNEP are initialized and a BNEP service, for server mode, 88 * is registered, before the Bluetooth stack gets started, as shown in Listing PanuSetup. 89 */ 90 91 /* LISTING_START(PanuSetup): Panu setup */ 92 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 93 static void handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 94 static void network_send_packet_callback(const uint8_t * packet, uint16_t size); 95 96 static void panu_setup(void){ 97 98 // Initialize L2CAP 99 l2cap_init(); 100 101 // Initialise BNEP 102 bnep_init(); 103 104 // Minimum L2CAP MTU for bnep is 1691 bytes 105 bnep_register_service(packet_handler, BLUETOOTH_SERVICE_CLASS_PANU, 1691); 106 107 // Initialize network interface 108 btstack_network_init(&network_send_packet_callback); 109 110 // register for HCI events 111 hci_event_callback_registration.callback = &packet_handler; 112 hci_add_event_handler(&hci_event_callback_registration); 113 } 114 /* LISTING_END */ 115 116 // PANU client routines 117 static void get_string_from_data_element(uint8_t * element, uint16_t buffer_size, char * buffer_data){ 118 de_size_t de_size = de_get_size_type(element); 119 int pos = de_get_header_size(element); 120 int len = 0; 121 switch (de_size){ 122 case DE_SIZE_VAR_8: 123 len = element[1]; 124 break; 125 case DE_SIZE_VAR_16: 126 len = big_endian_read_16(element, 1); 127 break; 128 default: 129 break; 130 } 131 uint16_t bytes_to_copy = btstack_min(buffer_size-1,len); 132 memcpy(buffer_data, &element[pos], bytes_to_copy); 133 buffer_data[bytes_to_copy] ='\0'; 134 } 135 136 137 /* @section SDP parser callback 138 * 139 * @text The SDP parsers retrieves the BNEP PAN UUID as explained in 140 * Section [on SDP BNEP Query example](#sec:sdpbnepqueryExample}. 141 */ 142 static void handle_sdp_client_record_complete(void){ 143 144 printf("SDP BNEP Record complete\n"); 145 146 // accept first entry or if we foudn a NAP and only have a PANU yet 147 if ((bnep_remote_uuid == 0) || (sdp_bnep_remote_uuid == BLUETOOTH_SERVICE_CLASS_NAP && bnep_remote_uuid == BLUETOOTH_SERVICE_CLASS_PANU)){ 148 bnep_l2cap_psm = sdp_bnep_l2cap_psm; 149 bnep_remote_uuid = sdp_bnep_remote_uuid; 150 bnep_version = sdp_bnep_version; 151 } 152 } 153 154 static void handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) { 155 156 UNUSED(packet_type); 157 UNUSED(channel); 158 UNUSED(size); 159 160 des_iterator_t des_list_it; 161 des_iterator_t prot_it; 162 char str[20]; 163 164 switch (hci_event_packet_get_type(packet)){ 165 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 166 // Handle new SDP record 167 if (sdp_event_query_attribute_byte_get_record_id(packet) != record_id) { 168 handle_sdp_client_record_complete(); 169 // next record started 170 record_id = sdp_event_query_attribute_byte_get_record_id(packet); 171 printf("SDP Record: Nr: %d\n", record_id); 172 } 173 174 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) { 175 attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 176 177 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 178 179 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 180 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 181 if (de_get_element_type(attribute_value) != DE_DES) break; 182 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 183 uint8_t * element = des_iterator_get_element(&des_list_it); 184 if (de_get_element_type(element) != DE_UUID) continue; 185 uint32_t uuid = de_get_uuid32(element); 186 switch (uuid){ 187 case BLUETOOTH_SERVICE_CLASS_PANU: 188 case BLUETOOTH_SERVICE_CLASS_NAP: 189 case BLUETOOTH_SERVICE_CLASS_GN: 190 printf("SDP Attribute 0x%04x: BNEP PAN protocol UUID: %04x\n", sdp_event_query_attribute_byte_get_attribute_id(packet), uuid); 191 sdp_bnep_remote_uuid = uuid; 192 break; 193 default: 194 break; 195 } 196 } 197 break; 198 case 0x0100: 199 case 0x0101: 200 get_string_from_data_element(attribute_value, sizeof(str), str); 201 printf("SDP Attribute: 0x%04x: %s\n", sdp_event_query_attribute_byte_get_attribute_id(packet), str); 202 free(str); 203 break; 204 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 205 printf("SDP Attribute: 0x%04x\n", sdp_event_query_attribute_byte_get_attribute_id(packet)); 206 207 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 208 uint8_t *des_element; 209 uint8_t *element; 210 uint32_t uuid; 211 212 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 213 214 des_element = des_iterator_get_element(&des_list_it); 215 des_iterator_init(&prot_it, des_element); 216 element = des_iterator_get_element(&prot_it); 217 218 if (!element) continue; 219 if (de_get_element_type(element) != DE_UUID) continue; 220 221 uuid = de_get_uuid32(element); 222 des_iterator_next(&prot_it); 223 switch (uuid){ 224 case BLUETOOTH_PROTOCOL_L2CAP: 225 if (!des_iterator_has_more(&prot_it)) continue; 226 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_bnep_l2cap_psm); 227 break; 228 case BLUETOOTH_PROTOCOL_BNEP: 229 if (!des_iterator_has_more(&prot_it)) continue; 230 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_bnep_version); 231 break; 232 default: 233 break; 234 } 235 } 236 printf("Summary: uuid 0x%04x, l2cap_psm 0x%04x, bnep_version 0x%04x\n", sdp_bnep_remote_uuid, sdp_bnep_l2cap_psm, sdp_bnep_version); 237 238 } 239 break; 240 default: 241 break; 242 } 243 } 244 } else { 245 fprintf(stderr, "SDP attribute value buffer size exceeded: available %d, required %d\n", attribute_value_buffer_size, sdp_event_query_attribute_byte_get_attribute_length(packet)); 246 } 247 break; 248 249 case SDP_EVENT_QUERY_COMPLETE: 250 handle_sdp_client_record_complete(); 251 fprintf(stderr, "General query done with status %d, bnep psm %04x.\n", sdp_event_query_complete_get_status(packet), bnep_l2cap_psm); 252 if (bnep_l2cap_psm){ 253 /* Create BNEP connection */ 254 bnep_connect(packet_handler, remote_addr, bnep_l2cap_psm, BLUETOOTH_SERVICE_CLASS_PANU, bnep_remote_uuid); 255 } else { 256 fprintf(stderr, "No BNEP service found\n"); 257 } 258 259 break; 260 } 261 } 262 263 /* 264 * @section Packet Handler 265 * 266 * @text The packet handler responds to various HCI Events. 267 */ 268 269 /* LISTING_START(packetHandler): Packet Handler */ 270 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) 271 { 272 /* LISTING_PAUSE */ 273 UNUSED(channel); 274 275 uint8_t event; 276 bd_addr_t event_addr; 277 bd_addr_t local_addr; 278 uint16_t uuid_source; 279 uint16_t uuid_dest; 280 uint16_t mtu; 281 282 /* LISTING_RESUME */ 283 switch (packet_type) { 284 case HCI_EVENT_PACKET: 285 event = hci_event_packet_get_type(packet); 286 switch (event) { 287 /* @text When BTSTACK_EVENT_STATE with state HCI_STATE_WORKING 288 * is received and the example is started in client mode, the remote SDP BNEP query is started. 289 */ 290 case BTSTACK_EVENT_STATE: 291 if (btstack_event_state_get_state(packet) == HCI_STATE_WORKING){ 292 printf("Start SDP BNEP query for remote PAN Network Access Point (NAP).\n"); 293 sdp_client_query_uuid16(&handle_sdp_client_query_result, remote_addr, BLUETOOTH_SERVICE_CLASS_NAP); 294 } 295 break; 296 297 /* LISTING_PAUSE */ 298 case HCI_EVENT_PIN_CODE_REQUEST: 299 // inform about pin code request 300 printf("Pin code request - using '0000'\n"); 301 hci_event_pin_code_request_get_bd_addr(packet, event_addr); 302 gap_pin_code_response(event_addr, "0000"); 303 break; 304 305 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 306 // inform about user confirmation request 307 printf("SSP User Confirmation Request with numeric value '%06u'\n", little_endian_read_32(packet, 8)); 308 printf("SSP User Confirmation Auto accept\n"); 309 break; 310 311 /* LISTING_RESUME */ 312 313 /* @text BNEP_EVENT_CHANNEL_OPENED is received after a BNEP connection was established or 314 * or when the connection fails. The status field returns the error code. 315 * 316 * The TAP network interface is then configured. A data source is set up and registered with the 317 * run loop to receive Ethernet packets from the TAP interface. 318 * 319 * The event contains both the source and destination UUIDs, as well as the MTU for this connection and 320 * the BNEP Channel ID, which is used for sending Ethernet packets over BNEP. 321 */ 322 case BNEP_EVENT_CHANNEL_OPENED: 323 if (bnep_event_channel_opened_get_status(packet)) { 324 printf("BNEP channel open failed, status %02x\n", bnep_event_channel_opened_get_status(packet)); 325 } else { 326 bnep_cid = bnep_event_channel_opened_get_bnep_cid(packet); 327 uuid_source = bnep_event_channel_opened_get_source_uuid(packet); 328 uuid_dest = bnep_event_channel_opened_get_destination_uuid(packet); 329 mtu = bnep_event_channel_opened_get_mtu(packet); 330 memcpy(&event_addr, &packet[11], sizeof(bd_addr_t)); 331 printf("BNEP connection open succeeded to %s source UUID 0x%04x dest UUID: 0x%04x, max frame size %u\n", bd_addr_to_str(event_addr), uuid_source, uuid_dest, mtu); 332 /* Setup network interface */ 333 gap_local_bd_addr(local_addr); 334 btstack_network_up(local_addr); 335 printf("Network Interface %s activated\n", btstack_network_get_name()); 336 } 337 break; 338 339 /* @text If there is a timeout during the connection setup, BNEP_EVENT_CHANNEL_TIMEOUT will be received 340 * and the BNEP connection will be closed 341 */ 342 case BNEP_EVENT_CHANNEL_TIMEOUT: 343 printf("BNEP channel timeout! Channel will be closed\n"); 344 break; 345 346 /* @text BNEP_EVENT_CHANNEL_CLOSED is received when the connection gets closed. 347 */ 348 case BNEP_EVENT_CHANNEL_CLOSED: 349 printf("BNEP channel closed\n"); 350 btstack_network_down(); 351 break; 352 353 /* @text BNEP_EVENT_CAN_SEND_NOW indicates that a new packet can be send. This triggers the send of a 354 * stored network packet. The tap datas source can be enabled again 355 */ 356 case BNEP_EVENT_CAN_SEND_NOW: 357 if (network_buffer_len > 0) { 358 bnep_send(bnep_cid, (uint8_t*) network_buffer, network_buffer_len); 359 network_buffer_len = 0; 360 btstack_network_packet_sent(); 361 } 362 break; 363 364 default: 365 break; 366 } 367 break; 368 369 /* @text Ethernet packets from the remote device are received in the packet handler with type BNEP_DATA_PACKET. 370 * It is forwarded to the TAP interface. 371 */ 372 case BNEP_DATA_PACKET: 373 // Write out the ethernet frame to the network interface 374 btstack_network_process_packet(packet, size); 375 break; 376 377 default: 378 break; 379 } 380 } 381 /* LISTING_END */ 382 383 /* 384 * @section Network packet handler 385 * 386 * @text A pointer to the network packet is stored and a BNEP_EVENT_CAN_SEND_NOW requested 387 */ 388 389 /* LISTING_START(networkPacketHandler): Network Packet Handler */ 390 static void network_send_packet_callback(const uint8_t * packet, uint16_t size){ 391 network_buffer = packet; 392 network_buffer_len = size; 393 bnep_request_can_send_now_event(bnep_cid); 394 } 395 /* LISTING_END */ 396 397 int btstack_main(int argc, const char * argv[]); 398 int btstack_main(int argc, const char * argv[]){ 399 400 (void)argc; 401 (void)argv; 402 403 panu_setup(); 404 405 // parse human readable Bluetooth address 406 sscanf_bd_addr(remote_addr_string, remote_addr); 407 408 // Turn on the device 409 hci_power_control(HCI_POWER_ON); 410 return 0; 411 } 412 413 /* EXAMPLE_END */ 414 /* -*- Mode: C; indent-tabs-mode: nil; c-basic-offset: 4; tab-width: 4 -*- */ 415 416