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btstack/example/hid_host_demo.c
Matthias Ringwald 8d995dff46 hid_host_demo: fix compile
2017-11-27 15:26:35 +01:00

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/*
* Copyright (C) 2017 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__ "hid_host_demo.c"
/*
* hid_host_demo.c
*/
/* EXAMPLE_START(hid_host_demo): HID Host Demo
*
* @text This example implements an HID Host. For now, it connnects to a fixed device, queries the HID SDP
* record and opens the HID Control + Interrupt channels
*/
#include <stdio.h>
#include "btstack_config.h"
#include "btstack.h"
#define MAX_ATTRIBUTE_VALUE_SIZE 300
// SDP
static uint8_t hid_descriptor[MAX_ATTRIBUTE_VALUE_SIZE];
static uint16_t hid_descriptor_len;
static uint16_t hid_control_psm;
static uint16_t hid_interrupt_psm;
static uint8_t attribute_value[MAX_ATTRIBUTE_VALUE_SIZE];
static const unsigned int attribute_value_buffer_size = MAX_ATTRIBUTE_VALUE_SIZE;
// L2CAP
static uint16_t l2cap_hid_control_cid;
static uint16_t l2cap_hid_interrupt_cid;
// MBP 2016
static const char * remote_addr_string = "F4-0F-24-3B-1B-E1";
// iMpulse static const char * remote_addr_string = "64:6E:6C:C1:AA:B5";
static bd_addr_t remote_addr;
static btstack_packet_callback_registration_t hci_event_callback_registration;
/* @section Main application configuration
*
* @text In the application configuration, L2CAP is initialized
*/
/* 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 hid_host_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();
}
/* LISTING_END */
/* @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_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 attribute_list_it;
des_iterator_t additional_des_it;
des_iterator_t prot_it;
uint8_t *des_element;
uint8_t *element;
uint32_t uuid;
uint8_t status;
switch (hci_event_packet_get_type(packet)){
case SDP_EVENT_QUERY_ATTRIBUTE_VALUE:
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_PROTOCOL_DESCRIPTOR_LIST:
for (des_iterator_init(&attribute_list_it, attribute_value); des_iterator_has_more(&attribute_list_it); des_iterator_next(&attribute_list_it)) {
if (des_iterator_get_type(&attribute_list_it) != DE_DES) continue;
des_element = des_iterator_get_element(&attribute_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), &hid_control_psm);
printf("HID Control PSM: 0x%04x\n", (int) hid_control_psm);
break;
default:
break;
}
}
break;
case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS:
for (des_iterator_init(&attribute_list_it, attribute_value); des_iterator_has_more(&attribute_list_it); des_iterator_next(&attribute_list_it)) {
if (des_iterator_get_type(&attribute_list_it) != DE_DES) continue;
des_element = des_iterator_get_element(&attribute_list_it);
for (des_iterator_init(&additional_des_it, des_element); des_iterator_has_more(&additional_des_it); des_iterator_next(&additional_des_it)) {
if (des_iterator_get_type(&additional_des_it) != DE_DES) continue;
des_element = des_iterator_get_element(&additional_des_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), &hid_interrupt_psm);
printf("HID Interrupt PSM: 0x%04x\n", (int) hid_interrupt_psm);
break;
default:
break;
}
}
}
break;
case BLUETOOTH_ATTRIBUTE_HID_DESCRIPTOR_LIST:
hid_descriptor_len = sdp_event_query_attribute_byte_get_attribute_length(packet);
memcpy(hid_descriptor, attribute_value, hid_descriptor_len);
printf("HID Descriptor:\n");
printf_hexdump(hid_descriptor, hid_descriptor_len);
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:
if (!hid_control_psm) {
printf("HID Control PSM missing\n");
break;
}
if (!hid_interrupt_psm) {
printf("HID Interrupt PSM missing\n");
break;
}
printf("Setup HID\n");
status = l2cap_create_channel(packet_handler, remote_addr, hid_control_psm, 48, &l2cap_hid_control_cid);
if (status){
printf("Connecting to HID Control failed: 0x%02x\n", status);
}
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 */
uint8_t event;
bd_addr_t event_addr;
uint8_t status;
uint16_t l2cap_cid;
/* 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 HID query is started.
*/
case BTSTACK_EVENT_STATE:
if (btstack_event_state_get_state(packet) == HCI_STATE_WORKING){
printf("Start SDP HID query for remote HID Device.\n");
sdp_client_query_uuid16(&handle_sdp_client_query_result, remote_addr, BLUETOOTH_SERVICE_CLASS_HUMAN_INTERFACE_DEVICE_SERVICE);
}
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 */
case L2CAP_EVENT_CHANNEL_OPENED:
status = packet[2];
if (status){
printf("L2CAP Connection failed: 0x%02x\n", status);
break;
}
l2cap_cid = little_endian_read_16(packet, 13);
if (!l2cap_cid) break;
if (l2cap_cid == l2cap_hid_control_cid){
status = l2cap_create_channel(packet_handler, remote_addr, hid_interrupt_psm, 48, &l2cap_hid_interrupt_cid);
if (status){
printf("Connecting to HID Control failed: 0x%02x\n", status);
break;
}
}
if (l2cap_cid == l2cap_hid_interrupt_cid){
printf("HID Connection established\n");
}
break;
default:
break;
}
break;
case L2CAP_DATA_PACKET:
// for now, just dump incoming data
if (channel == l2cap_hid_interrupt_cid){
printf("HID Interrupt: ");
} else if (channel == l2cap_hid_control_cid){
printf("HID Control: ");
} else {
break;
}
printf_hexdump(packet, size);
default:
break;
}
}
/* LISTING_END */
int btstack_main(int argc, const char * argv[]);
int btstack_main(int argc, const char * argv[]){
(void)argc;
(void)argv;
hid_host_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 */
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