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btstack/src/classic/hsp_hs.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__ "hsp_hs.c"
// *****************************************************************************
//
// HSP Headset
//
// *****************************************************************************
#include "btstack_config.h"
#include <stdint.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_hs.h"
#include "l2cap.h"
#define HSP_AG_OK "OK"
#define HSP_AG_ERROR "ERROR"
#define HSP_AG_RING "RING"
#define HSP_MICROPHONE_GAIN "+VGM="
#define HSP_SPEAKER_GAIN "+VGS="
#define HSP_HS_AT_CKPD "AT+CKPD=200\r\n"
#define HSP_HS_MICROPHONE_GAIN "AT+VGM"
#define HSP_HS_SPEAKER_GAIN "AT+VGS"
static const char default_hsp_hs_service_name[] = "Headset";
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 = 0;
static uint16_t rfcomm_handle = HCI_CON_HANDLE_INVALID;
// static uint8_t connection_state = 0;
static int hs_microphone_gain = -1;
static int hs_speaker_gain = -1;
static uint8_t hs_send_button_press = 0;
static uint8_t wait_ok = 0;
static uint8_t hs_accept_sco_connection = 0;
static uint8_t hs_support_custom_indications = 0;
static btstack_packet_callback_registration_t hci_event_callback_registration;
static uint8_t hsp_disconnect_rfcomm = 0;
static uint8_t hsp_establish_audio_connection = 0;
static uint8_t hsp_release_audio_connection = 0;
typedef enum {
HSP_IDLE,
HSP_SDP_QUERY_RFCOMM_CHANNEL,
HSP_W4_SDP_QUERY_COMPLETE,
HSP_W4_RFCOMM_CONNECTED,
HSP_RFCOMM_CONNECTION_ESTABLISHED,
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 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 btstack_packet_handler_t hsp_hs_callback;
static void dummy_notify(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t size){
// ok: no code
UNUSED(packet_type);
UNUSED(channel);
UNUSED(event);
UNUSED(size);
}
void hsp_hs_register_packet_handler(btstack_packet_handler_t callback){
if (callback == NULL){
callback = &dummy_notify;
}
hsp_hs_callback = callback;
}
static void emit_event(uint8_t event_subtype, uint8_t value){
if (!hsp_hs_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_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event));
}
static void emit_ring_event(void){
if (!hsp_hs_callback) return;
uint8_t event[3];
event[0] = HCI_EVENT_HSP_META;
event[1] = sizeof(event) - 2;
event[2] = HSP_SUBEVENT_RING;
(*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event));
}
static void emit_event_audio_connected(uint8_t status, uint16_t handle){
if (!hsp_hs_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_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event));
}
// remote audio volume control
// AG +VGM=13 [0..15] ; HS AT+VGM=6 | AG OK
static int hsp_hs_send_str_over_rfcomm(uint16_t cid, const char * command){
if (!rfcomm_can_send_packet_now(rfcomm_cid)) return 1;
int err = rfcomm_send(cid, (uint8_t*) command, strlen(command));
if (err){
log_info("rfcomm_send_internal -> error 0X%02x", err);
}
return err;
}
void hsp_hs_enable_custom_indications(int enable){
hs_support_custom_indications = enable;
}
int hsp_hs_send_result(const char * result){
if (!hs_support_custom_indications) return 1;
return hsp_hs_send_str_over_rfcomm(rfcomm_cid, result);
}
void hsp_hs_create_sdp_record(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * name, uint8_t have_remote_audio_control){
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);
{
// see Bluetooth Erratum #3507
de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET); // 0x1108
de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET_HS); // 0x1131
de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_GENERIC_AUDIO); // 0x1203
}
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 *hsp_profile = de_push_sequence(attribute);
{
de_add_number(hsp_profile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET);
de_add_number(hsp_profile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2
}
de_pop_sequence(attribute, hsp_profile);
}
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_hs_service_name), (uint8_t *) default_hsp_hs_service_name);
}
// Remote audio volume control
de_add_number(service, DE_UINT, DE_SIZE_16, 0x030C);
de_add_number(service, DE_BOOL, DE_SIZE_8, have_remote_audio_control);
}
static void hsp_hs_reset_state(void){
hsp_state = HSP_IDLE;
hs_microphone_gain = -1;
hs_speaker_gain = -1;
hs_send_button_press = 0;
wait_ok = 0;
hs_support_custom_indications = 0;
hsp_disconnect_rfcomm = 0;
hsp_establish_audio_connection = 0;
hsp_release_audio_connection = 0;
}
void hsp_hs_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_hs_reset_state();
}
void hsp_hs_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_hs_disconnect(void){
hsp_hs_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_establish_audio_connection = 0;
rfcomm_disconnect(rfcomm_cid);
}
void hsp_hs_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_hs_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_hs_set_microphone_gain(uint8_t gain){
if (gain >15) {
log_info("Gain must be in interval [0..15], it is given %d", gain);
return;
}
hs_microphone_gain = gain;
hsp_run();
}
// AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK
void hsp_hs_set_speaker_gain(uint8_t gain){
if (gain >15) {
log_info("Gain must be in interval [0..15], it is given %d", gain);
return;
}
hs_speaker_gain = gain;
hsp_run();
}
static void hsp_run_handle_state(void){
switch (hsp_state){
case HSP_SDP_QUERY_RFCOMM_CHANNEL:
hsp_state = HSP_W4_SDP_QUERY_COMPLETE;
sdp_client_query_rfcomm_channel_and_name_for_uuid(&handle_query_rfcomm_event, remote, BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG);
break;
case HSP_AUDIO_CONNECTION_ESTABLISHED:
case HSP_RFCOMM_CONNECTION_ESTABLISHED:
if (hs_microphone_gain >= 0){
if (!rfcomm_can_send_packet_now(rfcomm_cid)) {
rfcomm_request_can_send_now_event(rfcomm_cid);
return;
}
char buffer[20];
sprintf(buffer, "%s=%d\r\n", HSP_HS_MICROPHONE_GAIN, hs_microphone_gain);
hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer);
hs_microphone_gain = -1;
break;
}
if (hs_speaker_gain >= 0){
if (!rfcomm_can_send_packet_now(rfcomm_cid)) {
rfcomm_request_can_send_now_event(rfcomm_cid);
return;
}
char buffer[20];
sprintf(buffer, "%s=%d\r\n", HSP_HS_SPEAKER_GAIN, hs_speaker_gain);
hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer);
hs_speaker_gain = -1;
break;
}
break;
case HSP_W4_RFCOMM_DISCONNECTED:
rfcomm_disconnect(rfcomm_cid);
break;
default:
break;
}
}
static void hsp_run(void){
if (wait_ok) return;
if (hs_accept_sco_connection && hci_can_send_command_packet_now()){
bool eSCO = hs_accept_sco_connection == 2;
hs_accept_sco_connection = 0;
log_info("HSP: sending hci_accept_connection_request.");
// remote supported feature eSCO is set if link type is eSCO
// eSCO: S4 - max latency == transmission interval = 0x000c == 12 ms,
uint16_t max_latency;
uint8_t retransmission_effort;
uint16_t packet_types;
if (eSCO && hci_extended_sco_link_supported() && hci_remote_esco_supported(rfcomm_handle)){
max_latency = 0x000c;
retransmission_effort = 0x02;
packet_types = 0x388;
} else {
max_latency = 0xffff;
retransmission_effort = 0xff;
packet_types = 0x003f;
}
uint16_t sco_voice_setting = hci_get_sco_voice_setting();
log_info("HFP: sending hci_accept_connection_request, sco_voice_setting %02x", sco_voice_setting);
hci_send_cmd(&hci_accept_synchronous_connection, remote, 8000, 8000, max_latency,
sco_voice_setting, retransmission_effort, packet_types);
return;
}
if (hsp_release_audio_connection){
if (!rfcomm_can_send_packet_now(rfcomm_cid)) {
rfcomm_request_can_send_now_event(rfcomm_cid);
return;
}
hsp_release_audio_connection = 0;
wait_ok = 1;
hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD);
return;
}
if (hsp_establish_audio_connection){
if (!rfcomm_can_send_packet_now(rfcomm_cid)) {
rfcomm_request_can_send_now_event(rfcomm_cid);
return;
}
hsp_establish_audio_connection = 0;
wait_ok = 1;
hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD);
return;
}
if (hs_send_button_press){
if (!rfcomm_can_send_packet_now(rfcomm_cid)) {
rfcomm_request_can_send_now_event(rfcomm_cid);
return;
}
hs_send_button_press = 0;
wait_ok = 1;
hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD);
return;
}
hsp_run_handle_state();
}
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){
// skip over leading newline
while ((size > 0) && ((packet[0] == '\n') || (packet[0] == '\r'))){
size--;
packet++;
}
if (strncmp((char *)packet, HSP_AG_RING, strlen(HSP_AG_RING)) == 0){
emit_ring_event();
} else if (strncmp((char *)packet, HSP_AG_OK, strlen(HSP_AG_OK)) == 0){
wait_ok = 0;
} else if (strncmp((char *)packet, HSP_MICROPHONE_GAIN, strlen(HSP_MICROPHONE_GAIN)) == 0){
uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_MICROPHONE_GAIN)]);
emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain);
} else if (strncmp((char *)packet, HSP_SPEAKER_GAIN, strlen(HSP_SPEAKER_GAIN)) == 0){
uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_SPEAKER_GAIN)]);
emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain);
} else {
if (!hsp_hs_callback) return;
// strip trailing newline
while ((size > 0) && ((packet[size-1] == '\n') || (packet[size-1] == '\r'))){
size--;
}
// add trailing \0
packet[size] = 0;
// 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_AG_INDICATION;
event[3] = size;
(*hsp_hs_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_CONNECTION_REQUEST:
switch(hci_event_connection_request_get_link_type(packet)){
case 0: // SCO
case 2: // eSCO
hci_event_connection_request_get_bd_addr(packet, event_addr);
if (bd_addr_cmp(event_addr, remote) == 0){
if (hci_event_connection_request_get_link_type(packet) == 2){
hs_accept_sco_connection = 2;
} else {
hs_accept_sco_connection = 1;
}
log_info("hs_accept_sco_connection %u", hs_accept_sco_connection);
}
break;
default:
break;
}
break;
case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{
if (hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) return;
hci_event_synchronous_connection_complete_get_bd_addr(packet, event_addr);
uint8_t status = hci_event_synchronous_connection_complete_get_status(packet);
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);
if (status != 0){
log_error("(e)SCO Connection failed, status %u", status);
emit_event_audio_connected(status, sco_handle);
hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED ;
break;
}
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);
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", rfcomm_event_incoming_connection_get_server_channel(packet), bd_addr_to_str(event_addr));
hsp_state = HSP_W4_RFCOMM_CONNECTED;
rfcomm_accept_connection(rfcomm_cid);
break;
case RFCOMM_EVENT_CHANNEL_OPENED:
if (hsp_state != HSP_W4_RFCOMM_CONNECTED) return;
if (rfcomm_event_channel_opened_get_status(packet)) {
log_info("RFCOMM channel open failed, status %u", rfcomm_event_channel_opened_get_status(packet));
hsp_state = HSP_IDLE;
hsp_hs_reset_state();
} else {
rfcomm_event_channel_opened_get_bd_addr(packet, remote);
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, handle %02x", rfcomm_cid, mtu, rfcomm_handle);
hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED;
}
emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, rfcomm_event_channel_opened_get_status(packet));
break;
case RFCOMM_EVENT_CAN_SEND_NOW:
hsp_run();
break;
case HCI_EVENT_DISCONNECTION_COMPLETE:
handle = hci_event_disconnection_complete_get_connection_handle(packet);
if (handle == sco_handle){
sco_handle = 0;
hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED;
emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0);
break;
}
break;
case RFCOMM_EVENT_CHANNEL_CLOSED:
hsp_state = HSP_IDLE;
hsp_hs_reset_state();
emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0);
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 (hci_event_packet_get_type(packet)){
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("HSP: SDP_QUERY_COMPLETE. RFCOMM create channel, addr %s, rfcomm channel nr %d", bd_addr_to_str(remote), channel_nr);
rfcomm_create_channel(packet_handler, remote, channel_nr, NULL);
break;
}
hsp_hs_reset_state();
log_info("Service not found, status %u.", 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;
}
}
void hsp_hs_send_button_press(void){
if ((hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) || (hsp_state >= HSP_W4_RFCOMM_DISCONNECTED)) return;
hs_send_button_press = 1;
hsp_run();
}
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