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btstack/src/classic/hsp_ag.c
Matthias Ringwald 1f51cd71c2 hsp_ag: remove unused code and comments
2020-05-17 23:20:22 +02:00

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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__ "hsp_ag.c"
// *****************************************************************************
//
// HSP Audio Gateway
//
// *****************************************************************************
#include "btstack_config.h"
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "bluetooth_sdp.h"
#include "btstack_debug.h"
#include "btstack_event.h"
#include "btstack_memory.h"
#include "btstack_run_loop.h"
#include "classic/core.h"
#include "classic/sdp_server.h"
#include "classic/sdp_client_rfcomm.h"
#include "classic/sdp_util.h"
#include "hci.h"
#include "hci_cmd.h"
#include "hci_dump.h"
#include "hsp_ag.h"
#include "l2cap.h"
#define HSP_HS_BUTTON_PRESS "AT+CKPD=200"
#define HSP_HS_AT_CKPD "AT+CKPD\r\n"
#define HSP_AG_OK "\r\nOK\r\n"
#define HSP_AG_ERROR "\r\nERROR\r\n"
#define HSP_AG_RING "\r\nRING\r\n"
#define HSP_MICROPHONE_GAIN "+VGM"
#define HSP_SPEAKER_GAIN "+VGS"
#define HSP_HS_MICROPHONE_GAIN "AT+VGM="
#define HSP_HS_SPEAKER_GAIN "AT+VGS="
static const char default_hsp_ag_service_name[] = "Audio Gateway";
static bd_addr_t remote;
static uint8_t channel_nr = 0;
static uint16_t mtu;
static uint16_t rfcomm_cid = 0;
static uint16_t sco_handle = HCI_CON_HANDLE_INVALID;
static uint16_t rfcomm_handle = HCI_CON_HANDLE_INVALID;
static btstack_timer_source_t hs_timeout;
static int ag_microphone_gain = -1;
static int ag_speaker_gain = -1;
static uint8_t ag_ring = 0;
static uint8_t ag_send_ok = 0;
static uint8_t ag_send_error = 0;
static uint8_t ag_num_button_press_received = 0;
static uint8_t ag_support_custom_commands = 0;
static uint8_t hsp_disconnect_rfcomm = 0;
static uint8_t hsp_establish_audio_connection = 0;
static uint8_t hsp_release_audio_connection = 0;
static btstack_packet_callback_registration_t hci_event_callback_registration;
typedef enum {
HSP_IDLE,
HSP_SDP_QUERY_RFCOMM_CHANNEL,
HSP_W4_SDP_EVENT_QUERY_COMPLETE,
HSP_W4_RFCOMM_CONNECTED,
HSP_RFCOMM_CONNECTION_ESTABLISHED,
HSP_W4_RING_ANSWER,
HSP_W4_USER_ACTION,
HSP_W2_CONNECT_SCO,
HSP_W4_SCO_CONNECTED,
HSP_AUDIO_CONNECTION_ESTABLISHED,
HSP_W2_DISCONNECT_SCO,
HSP_W4_SCO_DISCONNECTED,
HSP_W2_DISCONNECT_RFCOMM,
HSP_W4_RFCOMM_DISCONNECTED,
HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN
} hsp_state_t;
static hsp_state_t hsp_state = HSP_IDLE;
static btstack_packet_handler_t hsp_ag_callback;
static void hsp_run(void);
static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
static void dummy_notify(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t size){
UNUSED(packet_type); // ok: no code
UNUSED(channel); // ok: no code
UNUSED(event); // ok: no code
UNUSED(size); // ok: no code
}
void hsp_ag_register_packet_handler(btstack_packet_handler_t callback){
if (callback == NULL){
callback = &dummy_notify;
}
hsp_ag_callback = callback;
}
static void emit_event(uint8_t event_subtype, uint8_t value){
if (!hsp_ag_callback) return;
uint8_t event[4];
event[0] = HCI_EVENT_HSP_META;
event[1] = sizeof(event) - 2;
event[2] = event_subtype;
event[3] = value; // status 0 == OK
(*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event));
}
static void emit_event_audio_connected(uint8_t status, uint16_t handle){
if (!hsp_ag_callback) return;
uint8_t event[6];
event[0] = HCI_EVENT_HSP_META;
event[1] = sizeof(event) - 2;
event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE;
event[3] = status;
little_endian_store_16(event, 4, handle);
(*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event));
}
void hsp_ag_create_sdp_record(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * name){
uint8_t* attribute;
de_create_sequence(service);
// 0x0000 "Service Record Handle"
de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE);
de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle);
// 0x0001 "Service Class ID List"
de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST);
attribute = de_push_sequence(service);
{
// "UUID for PAN Service"
de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG);
de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_GENERIC_AUDIO);
}
de_pop_sequence(service, attribute);
// 0x0004 "Protocol Descriptor List"
de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST);
attribute = de_push_sequence(service);
{
uint8_t* l2cpProtocol = de_push_sequence(attribute);
{
de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP);
}
de_pop_sequence(attribute, l2cpProtocol);
uint8_t* rfcomm = de_push_sequence(attribute);
{
de_add_number(rfcomm, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_RFCOMM); // rfcomm_service
de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel
}
de_pop_sequence(attribute, rfcomm);
}
de_pop_sequence(service, attribute);
// 0x0005 "Public Browse Group"
de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group
attribute = de_push_sequence(service);
{
de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT);
}
de_pop_sequence(service, attribute);
// 0x0009 "Bluetooth Profile Descriptor List"
de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST);
attribute = de_push_sequence(service);
{
uint8_t *sppProfile = de_push_sequence(attribute);
{
de_add_number(sppProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET);
de_add_number(sppProfile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2
}
de_pop_sequence(attribute, sppProfile);
}
de_pop_sequence(service, attribute);
// 0x0100 "Service Name"
de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100);
if (name){
de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name);
} else {
de_add_data(service, DE_STRING, strlen(default_hsp_ag_service_name), (uint8_t *) default_hsp_ag_service_name);
}
}
static int hsp_ag_send_str_over_rfcomm(const uint16_t cid, const char * command){
int err = rfcomm_send(cid, (uint8_t*) command, strlen(command));
if (err){
log_error("rfcomm_send_internal -> error 0X%02x", err);
return err;
}
return err;
}
void hsp_ag_enable_custom_commands(int enable){
ag_support_custom_commands = enable;
}
int hsp_ag_send_result(char * result){
if (!ag_support_custom_commands) return 1;
return hsp_ag_send_str_over_rfcomm(rfcomm_cid, result);
}
static void hsp_ag_reset_state(void){
hsp_state = HSP_IDLE;
rfcomm_cid = 0;
rfcomm_handle = HCI_CON_HANDLE_INVALID;
sco_handle = 0;
ag_send_ok = 0;
ag_send_error = 0;
ag_ring = 0;
ag_num_button_press_received = 0;
ag_support_custom_commands = 0;
ag_microphone_gain = -1;
ag_speaker_gain = -1;
hsp_disconnect_rfcomm = 0;
hsp_establish_audio_connection = 0;
hsp_release_audio_connection = 0;
}
void hsp_ag_init(uint8_t rfcomm_channel_nr){
// register for HCI events
hci_event_callback_registration.callback = &packet_handler;
hci_add_event_handler(&hci_event_callback_registration);
rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap
hsp_ag_reset_state();
}
void hsp_ag_connect(bd_addr_t bd_addr){
if (hsp_state != HSP_IDLE) return;
hsp_state = HSP_SDP_QUERY_RFCOMM_CHANNEL;
(void)memcpy(remote, bd_addr, 6);
hsp_run();
}
void hsp_ag_disconnect(void){
hsp_ag_release_audio_connection();
if (hsp_state < HSP_W4_RFCOMM_CONNECTED){
hsp_state = HSP_IDLE;
return;
}
if (hsp_state == HSP_W4_RFCOMM_CONNECTED){
hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN;
return;
}
hsp_disconnect_rfcomm = 1;
hsp_run();
}
void hsp_ag_establish_audio_connection(void){
switch (hsp_state){
case HSP_RFCOMM_CONNECTION_ESTABLISHED:
hsp_establish_audio_connection = 1;
hsp_state = HSP_W4_SCO_CONNECTED;
break;
case HSP_W4_RFCOMM_CONNECTED:
hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN;
break;
default:
break;
}
hsp_run();
}
void hsp_ag_release_audio_connection(void){
if (hsp_state >= HSP_W2_DISCONNECT_SCO) return;
if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return;
hsp_release_audio_connection = 1;
hsp_run();
}
void hsp_ag_set_microphone_gain(uint8_t gain){
if (gain >15) {
log_error("Gain must be in interval [0..15], it is given %d", gain);
return;
}
ag_microphone_gain = gain;
hsp_run();
}
// AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK
void hsp_ag_set_speaker_gain(uint8_t gain){
if (gain >15) {
log_error("Gain must be in interval [0..15], it is given %d", gain);
return;
}
ag_speaker_gain = gain;
hsp_run();
}
static void hsp_ringing_timeout_handler(btstack_timer_source_t * timer){
ag_ring = 1;
btstack_run_loop_set_timer(timer, 2000); // 2 seconds timeout
btstack_run_loop_add_timer(timer);
hsp_run();
}
static void hsp_ringing_timer_start(void){
btstack_run_loop_remove_timer(&hs_timeout);
btstack_run_loop_set_timer_handler(&hs_timeout, hsp_ringing_timeout_handler);
btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout
btstack_run_loop_add_timer(&hs_timeout);
}
static void hsp_ringing_timer_stop(void){
btstack_run_loop_remove_timer(&hs_timeout);
}
void hsp_ag_start_ringing(void){
ag_ring = 1;
if (hsp_state == HSP_W2_CONNECT_SCO) {
hsp_state = HSP_W4_RING_ANSWER;
}
hsp_ringing_timer_start();
}
void hsp_ag_stop_ringing(void){
ag_ring = 0;
if (hsp_state == HSP_W4_RING_ANSWER){
hsp_state = HSP_W2_CONNECT_SCO;
}
hsp_ringing_timer_stop();
}
static void hsp_run(void){
if (ag_send_ok){
if (!rfcomm_can_send_packet_now(rfcomm_cid)) {
rfcomm_request_can_send_now_event(rfcomm_cid);
return;
}
ag_send_ok = 0;
hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK);
return;
}
if (ag_send_error){
if (!rfcomm_can_send_packet_now(rfcomm_cid)) {
rfcomm_request_can_send_now_event(rfcomm_cid);
return;
}
ag_send_error = 0;
hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_ERROR);
return;
}
if (ag_ring){
if (!rfcomm_can_send_packet_now(rfcomm_cid)) {
rfcomm_request_can_send_now_event(rfcomm_cid);
return;
}
ag_ring = 0;
hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_RING);
return;
}
if (hsp_establish_audio_connection){
if (!hci_can_send_command_packet_now()) return;
hsp_establish_audio_connection = 0;
hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F);
return;
}
if (hsp_release_audio_connection){
hsp_release_audio_connection = 0;
gap_disconnect(sco_handle);
return;
}
if (hsp_disconnect_rfcomm){
hsp_disconnect_rfcomm = 0;
hsp_establish_audio_connection = 0;
rfcomm_disconnect(rfcomm_cid);
return;
}
switch (hsp_state){
case HSP_SDP_QUERY_RFCOMM_CHANNEL:
hsp_state = HSP_W4_SDP_EVENT_QUERY_COMPLETE;
log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(remote), BLUETOOTH_SERVICE_CLASS_HEADSET);
sdp_client_query_rfcomm_channel_and_name_for_uuid(&handle_query_rfcomm_event, remote, BLUETOOTH_SERVICE_CLASS_HEADSET);
break;
case HSP_W4_RING_ANSWER:
if (!ag_num_button_press_received) break;
if (!rfcomm_can_send_packet_now(rfcomm_cid)) {
rfcomm_request_can_send_now_event(rfcomm_cid);
return;
}
ag_send_ok = 0;
ag_num_button_press_received = 0;
hsp_state = HSP_W2_CONNECT_SCO;
hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK);
break;
case HSP_W2_CONNECT_SCO:
if (!hci_can_send_command_packet_now()) return;
hsp_state = HSP_W4_SCO_CONNECTED;
hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F);
break;
case HSP_W2_DISCONNECT_SCO:
ag_num_button_press_received = 0;
hsp_state = HSP_W4_SCO_DISCONNECTED;
gap_disconnect(sco_handle);
break;
case HSP_W2_DISCONNECT_RFCOMM:
rfcomm_disconnect(rfcomm_cid);
break;
case HSP_AUDIO_CONNECTION_ESTABLISHED:
case HSP_RFCOMM_CONNECTION_ESTABLISHED:
if (ag_microphone_gain >= 0){
if (!rfcomm_can_send_packet_now(rfcomm_cid)) {
rfcomm_request_can_send_now_event(rfcomm_cid);
return;
}
int gain = ag_microphone_gain;
ag_microphone_gain = -1;
char buffer[10];
sprintf(buffer, "%s=%d\r\n", HSP_MICROPHONE_GAIN, gain);
hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer);
break;
}
if (ag_speaker_gain >= 0){
if (!rfcomm_can_send_packet_now(rfcomm_cid)) {
rfcomm_request_can_send_now_event(rfcomm_cid);
return;
}
int gain = ag_speaker_gain;
ag_speaker_gain = -1;
char buffer[10];
sprintf(buffer, "%s=%d\r\n", HSP_SPEAKER_GAIN, gain);
hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer);
break;
}
break;
default:
break;
}
}
static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
UNUSED(channel); // ok: no channel for HCI_EVENT_PACKET and only single active RFCOMM channel
if (packet_type == RFCOMM_DATA_PACKET){
while ((size > 0) && ((packet[0] == '\n') || (packet[0] == '\r'))){
size--;
packet++;
}
if (strncmp((char *)packet, HSP_HS_BUTTON_PRESS, strlen(HSP_HS_BUTTON_PRESS)) == 0){
log_info("Received button press %s", HSP_HS_BUTTON_PRESS);
ag_send_ok = 1;
switch (hsp_state){
case HSP_AUDIO_CONNECTION_ESTABLISHED:
hsp_release_audio_connection = 1;
break;
case HSP_RFCOMM_CONNECTION_ESTABLISHED:
hsp_establish_audio_connection = 1;
break;
default:
break;
}
} else if (strncmp((char *)packet, HSP_HS_MICROPHONE_GAIN, strlen(HSP_HS_MICROPHONE_GAIN)) == 0){
uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_MICROPHONE_GAIN)]);
ag_send_ok = 1;
emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain);
} else if (strncmp((char *)packet, HSP_HS_SPEAKER_GAIN, strlen(HSP_HS_SPEAKER_GAIN)) == 0){
uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_SPEAKER_GAIN)]);
ag_send_ok = 1;
emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain);
} else if (strncmp((char *)packet, "AT+", 3) == 0){
ag_send_error = 1;
if (!hsp_ag_callback) return;
// re-use incoming buffer to avoid reserving large buffers - ugly but efficient
uint8_t * event = packet - 4;
event[0] = HCI_EVENT_HSP_META;
event[1] = size + 2;
event[2] = HSP_SUBEVENT_HS_COMMAND;
event[3] = size;
(*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, size+4);
}
hsp_run();
return;
}
if (packet_type != HCI_EVENT_PACKET) return;
uint8_t event = hci_event_packet_get_type(packet);
bd_addr_t event_addr;
uint16_t handle;
switch (event) {
case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{
uint8_t status = hci_event_synchronous_connection_complete_get_status(packet);
if (status != 0){
log_error("(e)SCO Connection failed, status %u", status);
emit_event_audio_connected(status, sco_handle);
break;
}
hci_event_synchronous_connection_complete_get_bd_addr(packet, event_addr);
sco_handle = hci_event_synchronous_connection_complete_get_handle(packet);
uint8_t link_type = hci_event_synchronous_connection_complete_get_link_type(packet);
uint8_t transmission_interval = hci_event_synchronous_connection_complete_get_transmission_interval(packet); // measured in slots
uint8_t retransmission_interval = hci_event_synchronous_connection_complete_get_retransmission_interval(packet);// measured in slots
uint16_t rx_packet_length = hci_event_synchronous_connection_complete_get_rx_packet_length(packet); // measured in bytes
uint16_t tx_packet_length = hci_event_synchronous_connection_complete_get_tx_packet_length(packet); // measured in bytes
uint8_t air_mode = hci_event_synchronous_connection_complete_get_air_mode(packet);
switch (link_type){
case 0x00:
log_info("SCO Connection established.");
if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval);
if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval);
if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length);
if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length);
break;
case 0x02:
log_info("eSCO Connection established.");
break;
default:
log_error("(e)SCO reserved link_type 0x%2x", link_type);
break;
}
log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, "
" rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle,
bd_addr_to_str(event_addr), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode);
if (hsp_state == HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN){
hsp_state = HSP_W2_DISCONNECT_SCO;
break;
}
hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED;
emit_event_audio_connected(status, sco_handle);
break;
}
case RFCOMM_EVENT_INCOMING_CONNECTION:
if (hsp_state != HSP_IDLE) return;
rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr);
rfcomm_cid = rfcomm_event_incoming_connection_get_rfcomm_cid(packet);
log_info("RFCOMM channel %u requested for %s with cid 0x%04x", rfcomm_event_incoming_connection_get_server_channel(packet), bd_addr_to_str(event_addr), rfcomm_cid);
hsp_state = HSP_W4_RFCOMM_CONNECTED;
rfcomm_accept_connection(rfcomm_cid);
break;
case RFCOMM_EVENT_CHANNEL_OPENED:
log_info("RFCOMM_EVENT_CHANNEL_OPENED packet_handler type %u, packet[0] %x", packet_type, packet[0]);
if (rfcomm_event_channel_opened_get_status(packet)) {
log_info("RFCOMM channel open failed, status %u§", rfcomm_event_channel_opened_get_status(packet));
hsp_ag_reset_state();
hsp_state = HSP_IDLE;
} else {
rfcomm_handle = rfcomm_event_channel_opened_get_con_handle(packet);
rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet);
mtu = rfcomm_event_channel_opened_get_max_frame_size(packet);
log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, state %d", rfcomm_cid, mtu, hsp_state);
hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED;
}
emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, packet[2]);
break;
case RFCOMM_EVENT_CHANNEL_CLOSED:
hsp_ag_reset_state();
emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0);
break;
case RFCOMM_EVENT_CAN_SEND_NOW:
hsp_run();
break;
case HCI_EVENT_DISCONNECTION_COMPLETE:
handle = little_endian_read_16(packet,3);
if (handle == sco_handle){
sco_handle = HCI_CON_HANDLE_INVALID;
hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED;
emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0);
break;
}
break;
default:
break;
}
hsp_run();
}
static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
UNUSED(packet_type); // ok: handling own sdp events
UNUSED(channel); // ok: no channel
UNUSED(size); // ok: handling own sdp events
switch (packet[0]){
case SDP_EVENT_QUERY_RFCOMM_SERVICE:
channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet);
log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr);
break;
case SDP_EVENT_QUERY_COMPLETE:
if (channel_nr > 0){
hsp_state = HSP_W4_RFCOMM_CONNECTED;
log_info("RFCOMM create channel. state %d", HSP_W4_RFCOMM_CONNECTED);
rfcomm_create_channel(packet_handler, remote, channel_nr, NULL);
break;
}
hsp_ag_reset_state();
log_info("Service not found, status %u.\n", sdp_event_query_complete_get_status(packet));
if (sdp_event_query_complete_get_status(packet)){
emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet));
} else {
emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND);
}
break;
default:
break;
}
}
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