/* * 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 #include #include #include #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 = 0; // 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; 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; } if (hsp_state < HSP_W4_SCO_CONNECTED){ hsp_state = HSP_W2_DISCONNECT_RFCOMM; return; } hsp_disconnect_rfcomm = 1; hsp_run(); } 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(void){ if (wait_ok) return; if (hs_accept_sco_connection && hci_can_send_command_packet_now()){ 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 (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_disconnect_rfcomm){ hsp_disconnect_rfcomm = 0; hsp_establish_audio_connection = 0; rfcomm_disconnect(rfcomm_cid); 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; } 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 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){ // printf("packet_handler type RFCOMM_DATA_PACKET %u, packet[0] %x\n", packet_type, packet[0]); // 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; // printf("packet_handler HCI_EVENT_PACKET type %u, packet[0] %x\n", packet_type, packet[0]); 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); printf("remote device %s\n", bd_addr_to_str(remote)); printf("accept sco for device %s\n", bd_addr_to_str(event_addr)); if (bd_addr_cmp(event_addr, remote) == 0){ printf("hs_accept_sco_connection \n"); hs_accept_sco_connection = 1; } break; default: break; } break; case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ if (hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) return; int index = 2; uint8_t status = packet[index++]; sco_handle = little_endian_read_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 = little_endian_read_16(packet, index); // measured in bytes index+=2; uint16_t tx_packet_length = little_endian_read_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); 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; reverse_bd_addr(&packet[2], event_addr); rfcomm_cid = little_endian_read_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(rfcomm_cid); break; case RFCOMM_EVENT_CHANNEL_OPENED: // printf("RFCOMM_EVENT_CHANNEL_OPENED 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 = 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); rfcomm_event_channel_opened_get_bd_addr(packet, remote); 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 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 = 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(HCI_EVENT_PACKET, 0, packet, size); 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(); }