/* * Copyright (C) 2014 BlueKitchen GmbH * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the copyright holders nor the names of * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * 4. Any redistribution, use, or modification is done solely for * personal benefit and not for any commercial purpose or for * monetary gain. * * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * Please inquire about commercial licensing options at * contact@bluekitchen-gmbh.com * */ #define __BTSTACK_FILE__ "panu_demo.c" /* * panu_demo.c * Author: Ole Reinhardt */ /* EXAMPLE_START(panu_demo): PANU Demo * * @text This example implements both a PANU client and a server. In server mode, it * sets up a BNEP server and registers a PANU SDP record and waits for incoming connections. * In client mode, it connects to a remote device, does an SDP Query to identify the PANU * service and initiates a BNEP connection. * * Note: currently supported only on Linux and Mac. */ #include #include "btstack_config.h" #include "btstack.h" static int record_id = -1; static uint16_t bnep_l2cap_psm = 0; static uint32_t bnep_remote_uuid = 0; static uint16_t bnep_version = 0; static uint16_t bnep_cid = 0; static uint16_t sdp_bnep_l2cap_psm = 0; static uint16_t sdp_bnep_version = 0; static uint32_t sdp_bnep_remote_uuid = 0; static uint8_t attribute_value[1000]; static const unsigned int attribute_value_buffer_size = sizeof(attribute_value); // MBP 2016 static const char * remote_addr_string = "F4-0F-24-3B-1B-E1"; // Wiko Sunny static const char * remote_addr_string = "A0:4C:5B:0F:B2:42"; static bd_addr_t remote_addr; static btstack_packet_callback_registration_t hci_event_callback_registration; // outgoing network packet static const uint8_t * network_buffer; static uint16_t network_buffer_len; /* @section Main application configuration * * @text In the application configuration, L2CAP and BNEP are initialized and a BNEP service, for server mode, * is registered, before the Bluetooth stack gets started, as shown in Listing PanuSetup. */ /* LISTING_START(PanuSetup): Panu setup */ static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); static void handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); static void network_send_packet_callback(const uint8_t * packet, uint16_t size); static void panu_setup(void){ // register for HCI events hci_event_callback_registration.callback = &packet_handler; hci_add_event_handler(&hci_event_callback_registration); // Initialize L2CAP l2cap_init(); // Initialise BNEP bnep_init(); // Minimum L2CAP MTU for bnep is 1691 bytes bnep_register_service(packet_handler, BLUETOOTH_SERVICE_CLASS_PANU, 1691); // Initialize network interface btstack_network_init(&network_send_packet_callback); } /* LISTING_END */ // PANU client routines static char * get_string_from_data_element(uint8_t * element){ de_size_t de_size = de_get_size_type(element); int pos = de_get_header_size(element); int len = 0; switch (de_size){ case DE_SIZE_VAR_8: len = element[1]; break; case DE_SIZE_VAR_16: len = big_endian_read_16(element, 1); break; default: break; } char * str = (char*)malloc(len+1); memcpy(str, &element[pos], len); str[len] ='\0'; return str; } /* @section SDP parser callback * * @text The SDP parsers retrieves the BNEP PAN UUID as explained in * Section [on SDP BNEP Query example](#sec:sdpbnepqueryExample}. */ static void handle_sdp_client_record_complete(void){ printf("SDP BNEP Record complete\n"); // accept first entry or if we foudn a NAP and only have a PANU yet if ((bnep_remote_uuid == 0) || (sdp_bnep_remote_uuid == BLUETOOTH_SERVICE_CLASS_NAP && bnep_remote_uuid == BLUETOOTH_SERVICE_CLASS_PANU)){ bnep_l2cap_psm = sdp_bnep_l2cap_psm; bnep_remote_uuid = sdp_bnep_remote_uuid; bnep_version = sdp_bnep_version; } } static void handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) { UNUSED(packet_type); UNUSED(channel); UNUSED(size); des_iterator_t des_list_it; des_iterator_t prot_it; char *str; switch (hci_event_packet_get_type(packet)){ case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: // Handle new SDP record if (sdp_event_query_attribute_byte_get_record_id(packet) != record_id) { handle_sdp_client_record_complete(); // next record started record_id = sdp_event_query_attribute_byte_get_record_id(packet); printf("SDP Record: Nr: %d\n", record_id); } if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) { attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: if (de_get_element_type(attribute_value) != DE_DES) break; for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { uint8_t * element = des_iterator_get_element(&des_list_it); if (de_get_element_type(element) != DE_UUID) continue; uint32_t uuid = de_get_uuid32(element); switch (uuid){ case BLUETOOTH_SERVICE_CLASS_PANU: case BLUETOOTH_SERVICE_CLASS_NAP: case BLUETOOTH_SERVICE_CLASS_GN: printf("SDP Attribute 0x%04x: BNEP PAN protocol UUID: %04x\n", sdp_event_query_attribute_byte_get_attribute_id(packet), uuid); sdp_bnep_remote_uuid = uuid; break; default: break; } } break; case 0x0100: case 0x0101: str = get_string_from_data_element(attribute_value); printf("SDP Attribute: 0x%04x: %s\n", sdp_event_query_attribute_byte_get_attribute_id(packet), str); free(str); break; case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { printf("SDP Attribute: 0x%04x\n", sdp_event_query_attribute_byte_get_attribute_id(packet)); for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { uint8_t *des_element; uint8_t *element; uint32_t uuid; if (des_iterator_get_type(&des_list_it) != DE_DES) continue; des_element = des_iterator_get_element(&des_list_it); des_iterator_init(&prot_it, des_element); element = des_iterator_get_element(&prot_it); if (de_get_element_type(element) != DE_UUID) continue; uuid = de_get_uuid32(element); switch (uuid){ case BLUETOOTH_PROTOCOL_L2CAP: if (!des_iterator_has_more(&prot_it)) continue; des_iterator_next(&prot_it); de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_bnep_l2cap_psm); break; case BLUETOOTH_PROTOCOL_BNEP: if (!des_iterator_has_more(&prot_it)) continue; des_iterator_next(&prot_it); de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_bnep_version); break; default: break; } } 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); } break; default: break; } } } else { 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)); } break; case SDP_EVENT_QUERY_COMPLETE: handle_sdp_client_record_complete(); fprintf(stderr, "General query done with status %d, bnep psm %04x.\n", sdp_event_query_complete_get_status(packet), bnep_l2cap_psm); if (bnep_l2cap_psm){ /* Create BNEP connection */ bnep_connect(packet_handler, remote_addr, bnep_l2cap_psm, BLUETOOTH_SERVICE_CLASS_PANU, bnep_remote_uuid); } else { fprintf(stderr, "No BNEP service found\n"); } break; } } /* * @section Packet Handler * * @text The packet handler responds to various HCI Events. */ /* LISTING_START(packetHandler): Packet Handler */ static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) { /* LISTING_PAUSE */ UNUSED(channel); uint8_t event; bd_addr_t event_addr; bd_addr_t local_addr; uint16_t uuid_source; uint16_t uuid_dest; uint16_t mtu; /* LISTING_RESUME */ switch (packet_type) { case HCI_EVENT_PACKET: event = hci_event_packet_get_type(packet); switch (event) { /* @text When BTSTACK_EVENT_STATE with state HCI_STATE_WORKING * is received and the example is started in client mode, the remote SDP BNEP query is started. */ case BTSTACK_EVENT_STATE: if (btstack_event_state_get_state(packet) == HCI_STATE_WORKING){ printf("Start SDP BNEP query for remote PAN Network Access Point (NAP).\n"); sdp_client_query_uuid16(&handle_sdp_client_query_result, remote_addr, BLUETOOTH_SERVICE_CLASS_NAP); } break; /* LISTING_PAUSE */ case HCI_EVENT_PIN_CODE_REQUEST: // inform about pin code request printf("Pin code request - using '0000'\n"); hci_event_pin_code_request_get_bd_addr(packet, event_addr); gap_pin_code_response(event_addr, "0000"); break; case HCI_EVENT_USER_CONFIRMATION_REQUEST: // inform about user confirmation request printf("SSP User Confirmation Request with numeric value '%06u'\n", little_endian_read_32(packet, 8)); printf("SSP User Confirmation Auto accept\n"); break; /* LISTING_RESUME */ /* @text BNEP_EVENT_CHANNEL_OPENED is received after a BNEP connection was established or * or when the connection fails. The status field returns the error code. * * The TAP network interface is then configured. A data source is set up and registered with the * run loop to receive Ethernet packets from the TAP interface. * * The event contains both the source and destination UUIDs, as well as the MTU for this connection and * the BNEP Channel ID, which is used for sending Ethernet packets over BNEP. */ case BNEP_EVENT_CHANNEL_OPENED: if (bnep_event_channel_opened_get_status(packet)) { printf("BNEP channel open failed, status %02x\n", bnep_event_channel_opened_get_status(packet)); } else { bnep_cid = bnep_event_channel_opened_get_bnep_cid(packet); uuid_source = bnep_event_channel_opened_get_source_uuid(packet); uuid_dest = bnep_event_channel_opened_get_destination_uuid(packet); mtu = bnep_event_channel_opened_get_mtu(packet); memcpy(&event_addr, &packet[11], sizeof(bd_addr_t)); 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); /* Setup network interface */ gap_local_bd_addr(local_addr); btstack_network_up(local_addr); printf("Network Interface %s activated\n", btstack_network_get_name()); } break; /* @text If there is a timeout during the connection setup, BNEP_EVENT_CHANNEL_TIMEOUT will be received * and the BNEP connection will be closed */ case BNEP_EVENT_CHANNEL_TIMEOUT: printf("BNEP channel timeout! Channel will be closed\n"); break; /* @text BNEP_EVENT_CHANNEL_CLOSED is received when the connection gets closed. */ case BNEP_EVENT_CHANNEL_CLOSED: printf("BNEP channel closed\n"); btstack_network_down(); break; /* @text BNEP_EVENT_CAN_SEND_NOW indicates that a new packet can be send. This triggers the send of a * stored network packet. The tap datas source can be enabled again */ case BNEP_EVENT_CAN_SEND_NOW: if (network_buffer_len > 0) { bnep_send(bnep_cid, (uint8_t*) network_buffer, network_buffer_len); network_buffer_len = 0; btstack_network_packet_sent(); } break; default: break; } break; /* @text Ethernet packets from the remote device are received in the packet handler with type BNEP_DATA_PACKET. * It is forwarded to the TAP interface. */ case BNEP_DATA_PACKET: // Write out the ethernet frame to the network interface btstack_network_process_packet(packet, size); break; default: break; } } /* LISTING_END */ /* * @section Network packet handler * * @text A pointer to the network packet is stored and a BNEP_EVENT_CAN_SEND_NOW requested */ /* LISTING_START(networkPacketHandler): Network Packet Handler */ static void network_send_packet_callback(const uint8_t * packet, uint16_t size){ network_buffer = packet; network_buffer_len = size; bnep_request_can_send_now_event(bnep_cid); } /* LISTING_END */ int btstack_main(int argc, const char * argv[]); int btstack_main(int argc, const char * argv[]){ (void)argc; (void)argv; panu_setup(); // parse human readable Bluetooth address sscanf_bd_addr(remote_addr_string, remote_addr); // Turn on the device hci_power_control(HCI_POWER_ON); return 0; } /* EXAMPLE_END */ /* -*- Mode: C; indent-tabs-mode: nil; c-basic-offset: 4; tab-width: 4 -*- */