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