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): BNEP/PANU (Linux only) 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 provides a TAP network interface which you 53 * can configure yourself. 54 * 55 * To enable client mode, uncomment ENABLE_PANU_CLIENT below. 56 */ 57 58 #include <stdio.h> 59 60 #include "btstack_config.h" 61 #include "btstack.h" 62 63 // #define ENABLE_PANU_CLIENT 64 65 // network types 66 #define NETWORK_TYPE_IPv4 0x0800 67 #define NETWORK_TYPE_ARP 0x0806 68 #define NETWORK_TYPE_IPv6 0x86DD 69 70 static uint16_t bnep_cid = 0; 71 72 #ifdef ENABLE_PANU_CLIENT 73 74 static int record_id = -1; 75 76 static uint16_t bnep_version = 0; 77 static uint32_t bnep_remote_uuid = 0; 78 static uint16_t bnep_l2cap_psm = 0; 79 80 static uint16_t sdp_bnep_l2cap_psm = 0; 81 static uint16_t sdp_bnep_version = 0; 82 static uint32_t sdp_bnep_remote_uuid = 0; 83 84 static uint8_t attribute_value[1000]; 85 static const unsigned int attribute_value_buffer_size = sizeof(attribute_value); 86 #endif 87 88 // MBP 2016 89 static const char * remote_addr_string = "78:4F:43:8C:B2:5D"; 90 // Wiko Sunny static const char * remote_addr_string = "A0:4C:5B:0F:B2:42"; 91 92 static bd_addr_t remote_addr; 93 94 static btstack_packet_callback_registration_t hci_event_callback_registration; 95 96 // outgoing network packet 97 static const uint8_t * network_buffer; 98 static uint16_t network_buffer_len; 99 100 static uint8_t panu_sdp_record[220]; 101 102 /* @section Main application configuration 103 * 104 * @text In the application configuration, L2CAP and BNEP are initialized and a BNEP service, for server mode, 105 * is registered, before the Bluetooth stack gets started, as shown in Listing PanuSetup. 106 */ 107 108 /* LISTING_START(PanuSetup): Panu setup */ 109 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 110 static void handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 111 static void network_send_packet_callback(const uint8_t * packet, uint16_t size); 112 113 static void panu_setup(void){ 114 115 // Initialize L2CAP 116 l2cap_init(); 117 118 119 // init SDP, create record for PANU and register with SDP 120 sdp_init(); 121 memset(panu_sdp_record, 0, sizeof(panu_sdp_record)); 122 uint16_t network_packet_types[] = { NETWORK_TYPE_IPv4, NETWORK_TYPE_ARP, 0}; // 0 as end of list 123 124 // Initialise BNEP 125 bnep_init(); 126 // Minimum L2CAP MTU for bnep is 1691 bytes 127 #ifdef ENABLE_PANU_CLIENT 128 bnep_register_service(packet_handler, BLUETOOTH_SERVICE_CLASS_PANU, 1691); 129 // PANU 130 pan_create_panu_sdp_record(panu_sdp_record, sdp_create_service_record_handle(), network_packet_types, NULL, NULL, BNEP_SECURITY_NONE); 131 #else 132 bnep_register_service(packet_handler, BLUETOOTH_SERVICE_CLASS_NAP, 1691); 133 // NAP Network Access Type: Other, 1 MB/s 134 pan_create_nap_sdp_record(panu_sdp_record, sdp_create_service_record_handle(), network_packet_types, NULL, NULL, BNEP_SECURITY_NONE, PAN_NET_ACCESS_TYPE_OTHER, 1000000, NULL, NULL); 135 #endif 136 sdp_register_service(panu_sdp_record); 137 printf("SDP service record size: %u\n", de_get_len((uint8_t*) panu_sdp_record)); 138 139 // Initialize network interface 140 btstack_network_init(&network_send_packet_callback); 141 142 // register for HCI events 143 hci_event_callback_registration.callback = &packet_handler; 144 hci_add_event_handler(&hci_event_callback_registration); 145 } 146 /* LISTING_END */ 147 148 #ifdef ENABLE_PANU_CLIENT 149 150 // PANU client routines 151 static void get_string_from_data_element(uint8_t * element, uint16_t buffer_size, char * buffer_data){ 152 de_size_t de_size = de_get_size_type(element); 153 int pos = de_get_header_size(element); 154 int len = 0; 155 switch (de_size){ 156 case DE_SIZE_VAR_8: 157 len = element[1]; 158 break; 159 case DE_SIZE_VAR_16: 160 len = big_endian_read_16(element, 1); 161 break; 162 default: 163 break; 164 } 165 uint16_t bytes_to_copy = btstack_min(buffer_size-1,len); 166 memcpy(buffer_data, &element[pos], bytes_to_copy); 167 buffer_data[bytes_to_copy] ='\0'; 168 } 169 170 171 /* @section SDP parser callback 172 * 173 * @text The SDP parsers retrieves the BNEP PAN UUID as explained in 174 * Section [on SDP BNEP Query example](#sec:sdpbnepqueryExample}. 175 */ 176 static void handle_sdp_client_record_complete(void){ 177 178 printf("SDP BNEP Record complete\n"); 179 180 // accept first entry or if we foudn a NAP and only have a PANU yet 181 if ((bnep_remote_uuid == 0) || (sdp_bnep_remote_uuid == BLUETOOTH_SERVICE_CLASS_NAP && bnep_remote_uuid == BLUETOOTH_SERVICE_CLASS_PANU)){ 182 bnep_l2cap_psm = sdp_bnep_l2cap_psm; 183 bnep_remote_uuid = sdp_bnep_remote_uuid; 184 bnep_version = sdp_bnep_version; 185 } 186 } 187 188 static void handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) { 189 190 UNUSED(packet_type); 191 UNUSED(channel); 192 UNUSED(size); 193 194 des_iterator_t des_list_it; 195 des_iterator_t prot_it; 196 char str[20]; 197 198 switch (hci_event_packet_get_type(packet)){ 199 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 200 // Handle new SDP record 201 if (sdp_event_query_attribute_byte_get_record_id(packet) != record_id) { 202 handle_sdp_client_record_complete(); 203 // next record started 204 record_id = sdp_event_query_attribute_byte_get_record_id(packet); 205 printf("SDP Record: Nr: %d\n", record_id); 206 } 207 208 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) { 209 attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 210 211 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 212 213 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 214 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 215 if (de_get_element_type(attribute_value) != DE_DES) break; 216 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 217 uint8_t * element = des_iterator_get_element(&des_list_it); 218 if (de_get_element_type(element) != DE_UUID) continue; 219 uint32_t uuid = de_get_uuid32(element); 220 switch (uuid){ 221 case BLUETOOTH_SERVICE_CLASS_PANU: 222 case BLUETOOTH_SERVICE_CLASS_NAP: 223 case BLUETOOTH_SERVICE_CLASS_GN: 224 printf("SDP Attribute 0x%04x: BNEP PAN protocol UUID: %04x\n", sdp_event_query_attribute_byte_get_attribute_id(packet), uuid); 225 sdp_bnep_remote_uuid = uuid; 226 break; 227 default: 228 break; 229 } 230 } 231 break; 232 case 0x0100: 233 case 0x0101: 234 get_string_from_data_element(attribute_value, sizeof(str), str); 235 printf("SDP Attribute: 0x%04x: %s\n", sdp_event_query_attribute_byte_get_attribute_id(packet), str); 236 break; 237 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 238 printf("SDP Attribute: 0x%04x\n", sdp_event_query_attribute_byte_get_attribute_id(packet)); 239 240 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 241 uint8_t *des_element; 242 uint8_t *element; 243 uint32_t uuid; 244 245 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 246 247 des_element = des_iterator_get_element(&des_list_it); 248 des_iterator_init(&prot_it, des_element); 249 element = des_iterator_get_element(&prot_it); 250 251 if (!element) continue; 252 if (de_get_element_type(element) != DE_UUID) continue; 253 254 uuid = de_get_uuid32(element); 255 des_iterator_next(&prot_it); 256 switch (uuid){ 257 case BLUETOOTH_PROTOCOL_L2CAP: 258 if (!des_iterator_has_more(&prot_it)) continue; 259 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_bnep_l2cap_psm); 260 break; 261 case BLUETOOTH_PROTOCOL_BNEP: 262 if (!des_iterator_has_more(&prot_it)) continue; 263 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_bnep_version); 264 break; 265 default: 266 break; 267 } 268 } 269 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); 270 271 } 272 break; 273 default: 274 break; 275 } 276 } 277 } else { 278 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)); 279 } 280 break; 281 282 case SDP_EVENT_QUERY_COMPLETE: 283 handle_sdp_client_record_complete(); 284 fprintf(stderr, "General query done with status %d, bnep psm %04x.\n", sdp_event_query_complete_get_status(packet), bnep_l2cap_psm); 285 if (bnep_l2cap_psm){ 286 /* Create BNEP connection */ 287 bnep_connect(packet_handler, remote_addr, bnep_l2cap_psm, BLUETOOTH_SERVICE_CLASS_PANU, bnep_remote_uuid); 288 } else { 289 fprintf(stderr, "No BNEP service found\n"); 290 } 291 292 break; 293 } 294 } 295 #endif 296 297 /* 298 * @section Packet Handler 299 * 300 * @text The packet handler responds to various HCI Events. 301 */ 302 303 /* LISTING_START(packetHandler): Packet Handler */ 304 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) 305 { 306 /* LISTING_PAUSE */ 307 UNUSED(channel); 308 309 uint8_t event; 310 bd_addr_t event_addr; 311 bd_addr_t local_addr; 312 uint16_t uuid_source; 313 uint16_t uuid_dest; 314 uint16_t mtu; 315 316 /* LISTING_RESUME */ 317 switch (packet_type) { 318 case HCI_EVENT_PACKET: 319 event = hci_event_packet_get_type(packet); 320 switch (event) { 321 #ifdef ENABLE_PANU_CLIENT 322 /* @text When BTSTACK_EVENT_STATE with state HCI_STATE_WORKING 323 * is received and the example is started in client mode, the remote SDP BNEP query is started. 324 */ 325 case BTSTACK_EVENT_STATE: 326 if (btstack_event_state_get_state(packet) == HCI_STATE_WORKING){ 327 printf("Start SDP BNEP query for remote PAN Network Access Point (NAP).\n"); 328 sdp_client_query_uuid16(&handle_sdp_client_query_result, remote_addr, BLUETOOTH_SERVICE_CLASS_NAP); 329 } 330 break; 331 #endif 332 /* LISTING_PAUSE */ 333 case HCI_EVENT_PIN_CODE_REQUEST: 334 // inform about pin code request 335 printf("Pin code request - using '0000'\n"); 336 hci_event_pin_code_request_get_bd_addr(packet, event_addr); 337 gap_pin_code_response(event_addr, "0000"); 338 break; 339 340 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 341 // inform about user confirmation request 342 printf("SSP User Confirmation Request with numeric value '%06u'\n", little_endian_read_32(packet, 8)); 343 printf("SSP User Confirmation Auto accept\n"); 344 break; 345 346 /* LISTING_RESUME */ 347 348 /* @text BNEP_EVENT_CHANNEL_OPENED is received after a BNEP connection was established or 349 * or when the connection fails. The status field returns the error code. 350 * 351 * The TAP network interface is then configured. A data source is set up and registered with the 352 * run loop to receive Ethernet packets from the TAP interface. 353 * 354 * The event contains both the source and destination UUIDs, as well as the MTU for this connection and 355 * the BNEP Channel ID, which is used for sending Ethernet packets over BNEP. 356 */ 357 case BNEP_EVENT_CHANNEL_OPENED: 358 if (bnep_event_channel_opened_get_status(packet)) { 359 printf("BNEP channel open failed, status %02x\n", bnep_event_channel_opened_get_status(packet)); 360 } else { 361 bnep_cid = bnep_event_channel_opened_get_bnep_cid(packet); 362 uuid_source = bnep_event_channel_opened_get_source_uuid(packet); 363 uuid_dest = bnep_event_channel_opened_get_destination_uuid(packet); 364 mtu = bnep_event_channel_opened_get_mtu(packet); 365 bnep_event_channel_opened_get_remote_address(packet, event_addr); 366 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); 367 368 /* Setup network interface */ 369 gap_local_bd_addr(local_addr); 370 btstack_network_up(local_addr); 371 printf("Network Interface %s activated\n", btstack_network_get_name()); 372 } 373 break; 374 375 /* @text If there is a timeout during the connection setup, BNEP_EVENT_CHANNEL_TIMEOUT will be received 376 * and the BNEP connection will be closed 377 */ 378 case BNEP_EVENT_CHANNEL_TIMEOUT: 379 printf("BNEP channel timeout! Channel will be closed\n"); 380 break; 381 382 /* @text BNEP_EVENT_CHANNEL_CLOSED is received when the connection gets closed. 383 */ 384 case BNEP_EVENT_CHANNEL_CLOSED: 385 printf("BNEP channel closed\n"); 386 btstack_network_down(); 387 break; 388 389 /* @text BNEP_EVENT_CAN_SEND_NOW indicates that a new packet can be send. This triggers the send of a 390 * stored network packet. The tap datas source can be enabled again 391 */ 392 case BNEP_EVENT_CAN_SEND_NOW: 393 if (network_buffer_len > 0) { 394 bnep_send(bnep_cid, (uint8_t*) network_buffer, network_buffer_len); 395 network_buffer_len = 0; 396 btstack_network_packet_sent(); 397 } 398 break; 399 400 default: 401 break; 402 } 403 break; 404 405 /* @text Ethernet packets from the remote device are received in the packet handler with type BNEP_DATA_PACKET. 406 * It is forwarded to the TAP interface. 407 */ 408 case BNEP_DATA_PACKET: 409 // Write out the ethernet frame to the network interface 410 btstack_network_process_packet(packet, size); 411 break; 412 413 default: 414 break; 415 } 416 } 417 /* LISTING_END */ 418 419 /* 420 * @section Network packet handler 421 * 422 * @text A pointer to the network packet is stored and a BNEP_EVENT_CAN_SEND_NOW requested 423 */ 424 425 /* LISTING_START(networkPacketHandler): Network Packet Handler */ 426 static void network_send_packet_callback(const uint8_t * packet, uint16_t size){ 427 network_buffer = packet; 428 network_buffer_len = size; 429 bnep_request_can_send_now_event(bnep_cid); 430 } 431 /* LISTING_END */ 432 433 int btstack_main(int argc, const char * argv[]); 434 int btstack_main(int argc, const char * argv[]){ 435 436 (void)argc; 437 (void)argv; 438 439 panu_setup(); 440 441 // parse human readable Bluetooth address 442 sscanf_bd_addr(remote_addr_string, remote_addr); 443 444 gap_discoverable_control(1); 445 gap_ssp_set_io_capability(SSP_IO_CAPABILITY_DISPLAY_YES_NO); 446 #ifdef ENABLE_PANU_CLIENT 447 gap_set_local_name("PANU Client 00:00:00:00:00:00"); 448 #else 449 gap_set_local_name("NAP Server 00:00:00:00:00:00"); 450 #endif 451 gap_set_class_of_device(0x020300); // Service Class "Networking", Major Device Class "LAN / NAT" 452 453 // Turn on the device 454 hci_power_control(HCI_POWER_ON); 455 return 0; 456 } 457 458 /* EXAMPLE_END */ 459 /* -*- Mode: C; indent-tabs-mode: nil; c-basic-offset: 4; tab-width: 4 -*- */ 460 461