static void handle_query_rfcomm_event(sdp_query_event_t * event, void * context){
sdp_query_rfcomm_service_event_t * ve;
sdp_query_complete_event_t * ce;
switch (event->type){
case SDP_QUERY_RFCOMM_SERVICE:
ve = (sdp_query_rfcomm_service_event_t*) event;
channel_nr = ve->channel_nr;
printf("** Service name: '%s', RFCOMM port %u\n", ve->service_name, channel_nr);
break;
case SDP_QUERY_COMPLETE:
ce = (sdp_query_complete_event_t*) event;
if (channel_nr > 0){
hsp_state = HSP_W4_RFCOMM_CONNECTED;
printf("RFCOMM create channel.\n");
rfcomm_create_channel_internal(NULL, remote, channel_nr);
break;
}
hsp_hs_reset_state();
printf("Service not found, status %u.\n", ce->status);
exit(0);
break;
}
}
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_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_init(uint8_t rfcomm_channel_nr){
// init L2CAP
l2cap_register_packet_handler(packet_handler);
rfcomm_register_packet_handler(packet_handler);
rfcomm_register_service_internal(NULL, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap
sdp_query_rfcomm_register_callback(handle_query_rfcomm_event, NULL);
hsp_hs_reset_state();
}
static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
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));
break;
}
}
static void handle_query_rfcomm_event(sdp_query_event_t * event, void * context){
sdp_query_rfcomm_service_event_t * ve;
sdp_query_complete_event_t * ce;
switch (event->type){
case SDP_QUERY_RFCOMM_SERVICE:
ve = (sdp_query_rfcomm_service_event_t*) event;
channel_nr = ve->channel_nr;
log_info("** Service name: '%s', RFCOMM port %u", ve->service_name, channel_nr);
break;
case SDP_QUERY_COMPLETE:
ce = (sdp_query_complete_event_t*) event;
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_internal(NULL, remote, channel_nr);
break;
}
hsp_hs_reset_state();
log_info("Service not fou nd, status %u.", ce->status);
break;
}
}
static void packet_handler (void * connection, uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
//printf("packet_handler type %u, packet[0] %x\n", packet_type, packet[0]);
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)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)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)(event, size+4);
}
hsp_run();
return;
}
if (packet_type != HCI_EVENT_PACKET) return;
uint8_t event = packet[0];
bd_addr_t event_addr;
uint16_t handle;
switch (event) {
case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{
if (hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) return;
int index = 2;
uint8_t status = packet[index++];
sco_handle = READ_BT_16(packet, index);
index+=2;
bd_addr_t address;
memcpy(address, &packet[index], 6);
index+=6;
uint8_t link_type = packet[index++];
uint8_t transmission_interval = packet[index++]; // measured in slots
uint8_t retransmission_interval = packet[index++];// measured in slots
uint16_t rx_packet_length = READ_BT_16(packet, index); // measured in bytes
index+=2;
uint16_t tx_packet_length = READ_BT_16(packet, index); // measured in bytes
index+=2;
uint8_t air_mode = packet[index];
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(address), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode);
// forward event to app
hsp_hs_callback(packet, size);
hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED;
emit_event_audio_connected(status, sco_handle);
break;
}
case RFCOMM_EVENT_INCOMING_CONNECTION:
// data: event (8), len(8), address(48), channel (8), rfcomm_cid (16)
if (hsp_state != HSP_IDLE) return;
bt_flip_addr(event_addr, &packet[2]);
rfcomm_cid = READ_BT_16(packet, 9);
log_info("RFCOMM channel %u requested for %s", packet[8], bd_addr_to_str(event_addr));
hsp_state = HSP_W4_RFCOMM_CONNECTED;
rfcomm_accept_connection_internal(rfcomm_cid);
break;
case RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE:
// printf("RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE packet_handler type %u, packet[0] %x\n", packet_type, packet[0]);
// data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16)
if (hsp_state != HSP_W4_RFCOMM_CONNECTED) return;
if (packet[2]) {
log_info("RFCOMM channel open failed, status %u", packet[2]);
hsp_state = HSP_IDLE;
hsp_hs_reset_state();
} else {
// data: event(8) , len(8), status (8), address (48), handle (16), server channel(8), rfcomm_cid(16), max frame size(16)
rfcomm_handle = READ_BT_16(packet, 9);
rfcomm_cid = READ_BT_16(packet, 12);
mtu = READ_BT_16(packet, 14);
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, packet[2]);
break;
case BTSTACK_EVENT_STATE:
case DAEMON_EVENT_HCI_PACKET_SENT:
case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:
case RFCOMM_EVENT_CREDITS:
hsp_hs_callback(packet, size);
break;
case HCI_EVENT_DISCONNECTION_COMPLETE:
handle = READ_BT_16(packet,3);
if (handle == sco_handle){
sco_handle = 0;
hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED;
emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0);
break;
}
if (handle == rfcomm_handle) {
rfcomm_handle = 0;
hsp_state = HSP_IDLE;
emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0);
hsp_hs_reset_state();
}
break;
case RFCOMM_EVENT_CHANNEL_CLOSED:
hsp_hs_reset_state();
hsp_hs_callback(packet, size);
break;
default:
break;
}
hsp_run();
}
static void packet_handler (void * connection, uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
// printf("packet_handler type %u, packet[0] %x\n", packet_type, packet[0]);
if (packet_type == RFCOMM_DATA_PACKET){
while (size > 0 && (packet[0] == '\n' || packet[0] == '\r')){
size--;
packet++;
}
if (strncmp((char *)packet, HSP_AG_RING, strlen(HSP_AG_RING)) == 0){
hs_ring_received = 1;
} if (strncmp((char *)packet, HSP_AG_OK, strlen(HSP_AG_OK)) == 0){
hs_ok_received = 1;
switch (hsp_state){
case HSP_W4_RFCOMM_CONNECTED:
hsp_state = HSP_W2_CONNECT_SCO;
break;
case HSP_W4_USER_ACTION:
hsp_state = HSP_W2_DISCONNECT_SCO;
break;
default:
break;
}
} else if (strncmp((char *)packet, HSP_MICROPHONE_GAIN, strlen(HSP_MICROPHONE_GAIN)) == 0){
uint8_t gain = (uint8_t)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)atoi((char*)&packet[strlen(HSP_SPEAKER_GAIN)]);
emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain);
} else {
if (!hsp_hs_callback) return;
// re-use incoming buffer to avoid reserving large buffers - ugly but efficient
uint8_t * event = packet - 3;
event[0] = HCI_EVENT_HSP_META;
event[1] = size + 1;
event[2] = HSP_SUBEVENT_AG_INDICATION;
(*hsp_hs_callback)(event, size+3);
}
hsp_run();
return;
}
if (packet_type != HCI_EVENT_PACKET) return;
uint8_t event = packet[0];
bd_addr_t event_addr;
uint16_t handle;
switch (event) {
case BTSTACK_EVENT_STATE:
// bt stack activated, get started
if (packet[2] == HCI_STATE_WORKING){
printf("BTstack activated, get started .\n");
}
break;
case HCI_EVENT_PIN_CODE_REQUEST:
// inform about pin code request
printf("Pin code request - using '0000'\n\r");
bt_flip_addr(event_addr, &packet[2]);
hci_send_cmd(&hci_pin_code_request_reply, &event_addr, 4, "0000");
break;
case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{
int index = 2;
uint8_t status = packet[index++];
sco_handle = READ_BT_16(packet, index);
index+=2;
bd_addr_t address;
memcpy(address, &packet[index], 6);
index+=6;
uint8_t link_type = packet[index++];
uint8_t transmission_interval = packet[index++]; // measured in slots
uint8_t retransmission_interval = packet[index++];// measured in slots
uint16_t rx_packet_length = READ_BT_16(packet, index); // measured in bytes
index+=2;
uint16_t tx_packet_length = READ_BT_16(packet, index); // measured in bytes
index+=2;
uint8_t air_mode = packet[index];
if (status != 0){
log_error("(e)SCO Connection is not established, status %u", status);
exit(0);
break;
}
switch (link_type){
case 0x00:
printf("SCO Connection established. \n");
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:
printf("eSCO Connection established. \n");
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(address), 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_ACTIVE;
emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, 0);
break;
}
case RFCOMM_EVENT_INCOMING_CONNECTION:
// data: event (8), len(8), address(48), channel (8), rfcomm_cid (16)
if (hsp_state != HSP_IDLE) return;
bt_flip_addr(event_addr, &packet[2]);
rfcomm_cid = READ_BT_16(packet, 9);
printf("RFCOMM channel %u requested for %s\n", packet[8], bd_addr_to_str(event_addr));
rfcomm_accept_connection_internal(rfcomm_cid);
hsp_state = HSP_W4_RFCOMM_CONNECTED;
hs_send_button_press = 1;
break;
case RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE:
printf("RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE packet_handler type %u, packet[0] %x\n", packet_type, packet[0]);
// data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16)
if (packet[2]) {
printf("RFCOMM channel open failed, status %u\n", packet[2]);
hsp_hs_reset_state();
emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, packet[2]);
} else {
// data: event(8) , len(8), status (8), address (48), handle (16), server channel(8), rfcomm_cid(16), max frame size(16)
rfcomm_handle = READ_BT_16(packet, 9);
rfcomm_cid = READ_BT_16(packet, 12);
mtu = READ_BT_16(packet, 14);
printf("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u\n", rfcomm_cid, mtu);
switch (hsp_state){
case HSP_W4_RFCOMM_CONNECTED:
hsp_state = HSP_W2_CONNECT_SCO;
hs_send_button_press = 1;
break;
case HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN:
hsp_state = HSP_W2_DISCONNECT_RFCOMM;
break;
default:
break;
}
}
break;
case DAEMON_EVENT_HCI_PACKET_SENT:
case RFCOMM_EVENT_CREDITS:
break;
case HCI_EVENT_DISCONNECTION_COMPLETE:
printf("HCI_EVENT_DISCONNECTION_COMPLETE \n");
if (hsp_state != HSP_W4_SCO_DISCONNECTED){
printf("received gap disconnect in wrong hsp state");
}
handle = READ_BT_16(packet,3);
if (handle == sco_handle){
sco_handle = 0;
hsp_state = HSP_W2_DISCONNECT_RFCOMM;
printf(" HSP_W2_DISCONNECT_RFCOMM\n");
break;
}
break;
case RFCOMM_EVENT_CHANNEL_CLOSED:
printf(" RFCOMM_EVENT_CHANNEL_CLOSED\n");
if (hsp_state != HSP_W4_RFCOMM_DISCONNECTED){
printf("received RFCOMM disconnect in wrong hsp state");
}
printf("RFCOMM channel closed\n");
hsp_hs_reset_state();
emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0);
break;
default:
break;
}
hsp_run();
}
