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btstack/example/panu_demo.c

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/*
* 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 <ole.reinhardt@kernelconcepts.de>
*/
/* 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.
*
* To enable client mode, uncomment ENABLE_PANU_CLIENT below
*/
#include <stdio.h>
#include "btstack_config.h"
#include "btstack.h"
// #define ENABLE_PANU_CLIENT
// network types
#define NETWORK_TYPE_IPv4 0x0800
#define NETWORK_TYPE_ARP 0x0806
#define NETWORK_TYPE_IPv6 0x86DD
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 = "78:4F:43:8C:B2:5D";
// 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;
static uint8_t panu_sdp_record[220];
/* @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){
// Initialize L2CAP
l2cap_init();
// init SDP, create record for PANU and register with SDP
sdp_init();
memset(panu_sdp_record, 0, sizeof(panu_sdp_record));
uint16_t network_packet_types[] = { NETWORK_TYPE_IPv4, NETWORK_TYPE_ARP, 0}; // 0 as end of list
// Initialise BNEP
bnep_init();
// Minimum L2CAP MTU for bnep is 1691 bytes
#ifdef ENABLE_PANU_CLIENT
bnep_register_service(packet_handler, BLUETOOTH_SERVICE_CLASS_PANU, 1691);
// PANU
pan_create_panu_sdp_record(panu_sdp_record, sdp_create_service_record_handle(), network_packet_types, NULL, NULL, BNEP_SECURITY_NONE);
#else
bnep_register_service(packet_handler, BLUETOOTH_SERVICE_CLASS_NAP, 1691);
// NAP Network Access Type: Other, 1 MB/s
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);
#endif
sdp_register_service(panu_sdp_record);
printf("SDP service record size: %u\n", de_get_len((uint8_t*) panu_sdp_record));
// Initialize network interface
btstack_network_init(&network_send_packet_callback);
// register for HCI events
hci_event_callback_registration.callback = &packet_handler;
hci_add_event_handler(&hci_event_callback_registration);
}
/* LISTING_END */
#ifdef ENABLE_PANU_CLIENT
// PANU client routines
static void get_string_from_data_element(uint8_t * element, uint16_t buffer_size, char * buffer_data){
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;
}
uint16_t bytes_to_copy = btstack_min(buffer_size-1,len);
memcpy(buffer_data, &element[pos], bytes_to_copy);
buffer_data[bytes_to_copy] ='\0';
}
/* @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[20];
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:
get_string_from_data_element(attribute_value, sizeof(str), str);
printf("SDP Attribute: 0x%04x: %s\n", sdp_event_query_attribute_byte_get_attribute_id(packet), 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 (!element) continue;
if (de_get_element_type(element) != DE_UUID) continue;
uuid = de_get_uuid32(element);
des_iterator_next(&prot_it);
switch (uuid){
case BLUETOOTH_PROTOCOL_L2CAP:
if (!des_iterator_has_more(&prot_it)) continue;
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;
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;
}
}
#endif
/*
* @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) {
#ifdef ENABLE_PANU_CLIENT
/* @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;
#endif
/* 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);
bnep_event_channel_opened_get_remote_address(packet, event_addr);
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);
gap_discoverable_control(1);
gap_ssp_set_io_capability(SSP_IO_CAPABILITY_DISPLAY_YES_NO);
#ifdef ENABLE_PANU_CLIENT
gap_set_local_name("PANU Client 00:00:00:00:00:00");
#else
gap_set_local_name("NAP Server 00:00:00:00:00:00");
#endif
gap_set_class_of_device(0x020300); // Service Class "Networking", Major Device Class "LAN / NAT"
// 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 -*- */
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