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