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 * To enable client mode, uncomment ENABLE_PANU_CLIENT below 55 */ 56 57 #include <stdio.h> 58 59 #include "btstack_config.h" 60 #include "btstack.h" 61 62 // #define ENABLE_PANU_CLIENT 63 64 // network types 65 #define NETWORK_TYPE_IPv4 0x0800 66 #define NETWORK_TYPE_ARP 0x0806 67 #define NETWORK_TYPE_IPv6 0x86DD 68 69 static int record_id = -1; 70 static uint16_t bnep_l2cap_psm = 0; 71 static uint32_t bnep_remote_uuid = 0; 72 static uint16_t bnep_version = 0; 73 static uint16_t bnep_cid = 0; 74 75 static uint16_t sdp_bnep_l2cap_psm = 0; 76 static uint16_t sdp_bnep_version = 0; 77 static uint32_t sdp_bnep_remote_uuid = 0; 78 79 static uint8_t attribute_value[1000]; 80 static const unsigned int attribute_value_buffer_size = sizeof(attribute_value); 81 82 // MBP 2016 83 static const char * remote_addr_string = "78:4F:43:8C:B2:5D"; 84 // Wiko Sunny static const char * remote_addr_string = "A0:4C:5B:0F:B2:42"; 85 86 static bd_addr_t remote_addr; 87 88 static btstack_packet_callback_registration_t hci_event_callback_registration; 89 90 // outgoing network packet 91 static const uint8_t * network_buffer; 92 static uint16_t network_buffer_len; 93 94 static uint8_t panu_sdp_record[220]; 95 96 /* @section Main application configuration 97 * 98 * @text In the application configuration, L2CAP and BNEP are initialized and a BNEP service, for server mode, 99 * is registered, before the Bluetooth stack gets started, as shown in Listing PanuSetup. 100 */ 101 102 /* LISTING_START(PanuSetup): Panu setup */ 103 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 104 static void handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 105 static void network_send_packet_callback(const uint8_t * packet, uint16_t size); 106 107 static void panu_setup(void){ 108 109 // Initialize L2CAP 110 l2cap_init(); 111 112 // Initialise BNEP 113 bnep_init(); 114 115 // Minimum L2CAP MTU for bnep is 1691 bytes 116 bnep_register_service(packet_handler, BLUETOOTH_SERVICE_CLASS_PANU, 1691); 117 118 // init SDP, create record for PANU and register with SDP 119 sdp_init(); 120 memset(panu_sdp_record, 0, sizeof(panu_sdp_record)); 121 uint16_t network_packet_types[] = { NETWORK_TYPE_IPv4, NETWORK_TYPE_ARP, 0}; // 0 as end of list 122 #ifdef ENABLE_PANU_CLIENT 123 pan_create_panu_sdp_record(panu_sdp_record, sdp_create_service_record_handle(), network_packet_types, NULL, NULL, BNEP_SECURITY_NONE); 124 #else 125 // NAP: Network Access Type: Cable Modem, 1 MB/s 126 pan_create_nap_sdp_record(panu_sdp_record, sdp_create_service_record_handle(), network_packet_types, NULL, NULL, BNEP_SECURITY_SERVICE_LEVEL_ENFORCED, PAN_NET_ACCESS_TYPE_CABLE_MODEM, 1000000, NULL, NULL); 127 #endif 128 sdp_register_service(panu_sdp_record); 129 printf("SDP service record size: %u\n", de_get_len((uint8_t*) panu_sdp_record)); 130 131 // Initialize network interface 132 btstack_network_init(&network_send_packet_callback); 133 134 // register for HCI events 135 hci_event_callback_registration.callback = &packet_handler; 136 hci_add_event_handler(&hci_event_callback_registration); 137 } 138 /* LISTING_END */ 139 140 #ifdef ENABLE_PANU_CLIENT 141 142 // PANU client routines 143 static void get_string_from_data_element(uint8_t * element, uint16_t buffer_size, char * buffer_data){ 144 de_size_t de_size = de_get_size_type(element); 145 int pos = de_get_header_size(element); 146 int len = 0; 147 switch (de_size){ 148 case DE_SIZE_VAR_8: 149 len = element[1]; 150 break; 151 case DE_SIZE_VAR_16: 152 len = big_endian_read_16(element, 1); 153 break; 154 default: 155 break; 156 } 157 uint16_t bytes_to_copy = btstack_min(buffer_size-1,len); 158 memcpy(buffer_data, &element[pos], bytes_to_copy); 159 buffer_data[bytes_to_copy] ='\0'; 160 } 161 162 163 /* @section SDP parser callback 164 * 165 * @text The SDP parsers retrieves the BNEP PAN UUID as explained in 166 * Section [on SDP BNEP Query example](#sec:sdpbnepqueryExample}. 167 */ 168 static void handle_sdp_client_record_complete(void){ 169 170 printf("SDP BNEP Record complete\n"); 171 172 // accept first entry or if we foudn a NAP and only have a PANU yet 173 if ((bnep_remote_uuid == 0) || (sdp_bnep_remote_uuid == BLUETOOTH_SERVICE_CLASS_NAP && bnep_remote_uuid == BLUETOOTH_SERVICE_CLASS_PANU)){ 174 bnep_l2cap_psm = sdp_bnep_l2cap_psm; 175 bnep_remote_uuid = sdp_bnep_remote_uuid; 176 bnep_version = sdp_bnep_version; 177 } 178 } 179 180 static void handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) { 181 182 UNUSED(packet_type); 183 UNUSED(channel); 184 UNUSED(size); 185 186 des_iterator_t des_list_it; 187 des_iterator_t prot_it; 188 char str[20]; 189 190 switch (hci_event_packet_get_type(packet)){ 191 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 192 // Handle new SDP record 193 if (sdp_event_query_attribute_byte_get_record_id(packet) != record_id) { 194 handle_sdp_client_record_complete(); 195 // next record started 196 record_id = sdp_event_query_attribute_byte_get_record_id(packet); 197 printf("SDP Record: Nr: %d\n", record_id); 198 } 199 200 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) { 201 attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 202 203 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 204 205 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 206 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 207 if (de_get_element_type(attribute_value) != DE_DES) break; 208 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 209 uint8_t * element = des_iterator_get_element(&des_list_it); 210 if (de_get_element_type(element) != DE_UUID) continue; 211 uint32_t uuid = de_get_uuid32(element); 212 switch (uuid){ 213 case BLUETOOTH_SERVICE_CLASS_PANU: 214 case BLUETOOTH_SERVICE_CLASS_NAP: 215 case BLUETOOTH_SERVICE_CLASS_GN: 216 printf("SDP Attribute 0x%04x: BNEP PAN protocol UUID: %04x\n", sdp_event_query_attribute_byte_get_attribute_id(packet), uuid); 217 sdp_bnep_remote_uuid = uuid; 218 break; 219 default: 220 break; 221 } 222 } 223 break; 224 case 0x0100: 225 case 0x0101: 226 get_string_from_data_element(attribute_value, sizeof(str), str); 227 printf("SDP Attribute: 0x%04x: %s\n", sdp_event_query_attribute_byte_get_attribute_id(packet), str); 228 break; 229 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 230 printf("SDP Attribute: 0x%04x\n", sdp_event_query_attribute_byte_get_attribute_id(packet)); 231 232 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 233 uint8_t *des_element; 234 uint8_t *element; 235 uint32_t uuid; 236 237 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 238 239 des_element = des_iterator_get_element(&des_list_it); 240 des_iterator_init(&prot_it, des_element); 241 element = des_iterator_get_element(&prot_it); 242 243 if (!element) continue; 244 if (de_get_element_type(element) != DE_UUID) continue; 245 246 uuid = de_get_uuid32(element); 247 des_iterator_next(&prot_it); 248 switch (uuid){ 249 case BLUETOOTH_PROTOCOL_L2CAP: 250 if (!des_iterator_has_more(&prot_it)) continue; 251 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_bnep_l2cap_psm); 252 break; 253 case BLUETOOTH_PROTOCOL_BNEP: 254 if (!des_iterator_has_more(&prot_it)) continue; 255 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_bnep_version); 256 break; 257 default: 258 break; 259 } 260 } 261 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); 262 263 } 264 break; 265 default: 266 break; 267 } 268 } 269 } else { 270 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)); 271 } 272 break; 273 274 case SDP_EVENT_QUERY_COMPLETE: 275 handle_sdp_client_record_complete(); 276 fprintf(stderr, "General query done with status %d, bnep psm %04x.\n", sdp_event_query_complete_get_status(packet), bnep_l2cap_psm); 277 if (bnep_l2cap_psm){ 278 /* Create BNEP connection */ 279 bnep_connect(packet_handler, remote_addr, bnep_l2cap_psm, BLUETOOTH_SERVICE_CLASS_PANU, bnep_remote_uuid); 280 } else { 281 fprintf(stderr, "No BNEP service found\n"); 282 } 283 284 break; 285 } 286 } 287 #endif 288 289 /* 290 * @section Packet Handler 291 * 292 * @text The packet handler responds to various HCI Events. 293 */ 294 295 /* LISTING_START(packetHandler): Packet Handler */ 296 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) 297 { 298 /* LISTING_PAUSE */ 299 UNUSED(channel); 300 301 uint8_t event; 302 bd_addr_t event_addr; 303 bd_addr_t local_addr; 304 uint16_t uuid_source; 305 uint16_t uuid_dest; 306 uint16_t mtu; 307 308 /* LISTING_RESUME */ 309 switch (packet_type) { 310 case HCI_EVENT_PACKET: 311 event = hci_event_packet_get_type(packet); 312 switch (event) { 313 #ifdef ENABLE_PANU_CLIENT 314 /* @text When BTSTACK_EVENT_STATE with state HCI_STATE_WORKING 315 * is received and the example is started in client mode, the remote SDP BNEP query is started. 316 */ 317 case BTSTACK_EVENT_STATE: 318 if (btstack_event_state_get_state(packet) == HCI_STATE_WORKING){ 319 printf("Start SDP BNEP query for remote PAN Network Access Point (NAP).\n"); 320 sdp_client_query_uuid16(&handle_sdp_client_query_result, remote_addr, BLUETOOTH_SERVICE_CLASS_NAP); 321 } 322 break; 323 #endif 324 /* LISTING_PAUSE */ 325 case HCI_EVENT_PIN_CODE_REQUEST: 326 // inform about pin code request 327 printf("Pin code request - using '0000'\n"); 328 hci_event_pin_code_request_get_bd_addr(packet, event_addr); 329 gap_pin_code_response(event_addr, "0000"); 330 break; 331 332 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 333 // inform about user confirmation request 334 printf("SSP User Confirmation Request with numeric value '%06u'\n", little_endian_read_32(packet, 8)); 335 printf("SSP User Confirmation Auto accept\n"); 336 break; 337 338 /* LISTING_RESUME */ 339 340 /* @text BNEP_EVENT_CHANNEL_OPENED is received after a BNEP connection was established or 341 * or when the connection fails. The status field returns the error code. 342 * 343 * The TAP network interface is then configured. A data source is set up and registered with the 344 * run loop to receive Ethernet packets from the TAP interface. 345 * 346 * The event contains both the source and destination UUIDs, as well as the MTU for this connection and 347 * the BNEP Channel ID, which is used for sending Ethernet packets over BNEP. 348 */ 349 case BNEP_EVENT_CHANNEL_OPENED: 350 if (bnep_event_channel_opened_get_status(packet)) { 351 printf("BNEP channel open failed, status %02x\n", bnep_event_channel_opened_get_status(packet)); 352 } else { 353 bnep_cid = bnep_event_channel_opened_get_bnep_cid(packet); 354 uuid_source = bnep_event_channel_opened_get_source_uuid(packet); 355 uuid_dest = bnep_event_channel_opened_get_destination_uuid(packet); 356 mtu = bnep_event_channel_opened_get_mtu(packet); 357 memcpy(&event_addr, &packet[11], sizeof(bd_addr_t)); 358 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); 359 /* Setup network interface */ 360 gap_local_bd_addr(local_addr); 361 btstack_network_up(local_addr); 362 printf("Network Interface %s activated\n", btstack_network_get_name()); 363 } 364 break; 365 366 /* @text If there is a timeout during the connection setup, BNEP_EVENT_CHANNEL_TIMEOUT will be received 367 * and the BNEP connection will be closed 368 */ 369 case BNEP_EVENT_CHANNEL_TIMEOUT: 370 printf("BNEP channel timeout! Channel will be closed\n"); 371 break; 372 373 /* @text BNEP_EVENT_CHANNEL_CLOSED is received when the connection gets closed. 374 */ 375 case BNEP_EVENT_CHANNEL_CLOSED: 376 printf("BNEP channel closed\n"); 377 btstack_network_down(); 378 break; 379 380 /* @text BNEP_EVENT_CAN_SEND_NOW indicates that a new packet can be send. This triggers the send of a 381 * stored network packet. The tap datas source can be enabled again 382 */ 383 case BNEP_EVENT_CAN_SEND_NOW: 384 if (network_buffer_len > 0) { 385 bnep_send(bnep_cid, (uint8_t*) network_buffer, network_buffer_len); 386 network_buffer_len = 0; 387 btstack_network_packet_sent(); 388 } 389 break; 390 391 default: 392 break; 393 } 394 break; 395 396 /* @text Ethernet packets from the remote device are received in the packet handler with type BNEP_DATA_PACKET. 397 * It is forwarded to the TAP interface. 398 */ 399 case BNEP_DATA_PACKET: 400 // Write out the ethernet frame to the network interface 401 btstack_network_process_packet(packet, size); 402 break; 403 404 default: 405 break; 406 } 407 } 408 /* LISTING_END */ 409 410 /* 411 * @section Network packet handler 412 * 413 * @text A pointer to the network packet is stored and a BNEP_EVENT_CAN_SEND_NOW requested 414 */ 415 416 /* LISTING_START(networkPacketHandler): Network Packet Handler */ 417 static void network_send_packet_callback(const uint8_t * packet, uint16_t size){ 418 network_buffer = packet; 419 network_buffer_len = size; 420 bnep_request_can_send_now_event(bnep_cid); 421 } 422 /* LISTING_END */ 423 424 int btstack_main(int argc, const char * argv[]); 425 int btstack_main(int argc, const char * argv[]){ 426 427 (void)argc; 428 (void)argv; 429 430 panu_setup(); 431 432 // parse human readable Bluetooth address 433 sscanf_bd_addr(remote_addr_string, remote_addr); 434 435 gap_discoverable_control(1); 436 gap_ssp_set_io_capability(SSP_IO_CAPABILITY_DISPLAY_YES_NO); 437 #ifdef ENABLE_PANU_CLIENT 438 gap_set_local_name("PANU Client 00:00:00:00:00:00"); 439 #else 440 gap_set_local_name("NAP Server 00:00:00:00:00:00"); 441 #endif 442 gap_set_class_of_device(0x020300); // Service Class "Networking", Major Device Class "LAN / NAT" 443 444 // Turn on the device 445 hci_power_control(HCI_POWER_ON); 446 return 0; 447 } 448 449 /* EXAMPLE_END */ 450 /* -*- Mode: C; indent-tabs-mode: nil; c-basic-offset: 4; tab-width: 4 -*- */ 451 452