/* * Copyright (C) 2016 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__ "avrcp.c" #include #include #include #include #include "btstack.h" #include "classic/avrcp.h" #include "classic/avrcp_controller.h" #define PSM_AVCTP BLUETOOTH_PROTOCOL_AVCTP #define PSM_AVCTP_BROWSING 0x001b /* Category 1: Player/Recorder Category 2: Monitor/Amplifier Category 3: Tuner Category 4: Menu */ /* controller supported features Bit 0 = Category 1 Bit 1 = Category 2 Bit 2 = Category 3 Bit 3 = Category 4 Bit 4-5 = RFA Bit 6 = Supports browsing Bit 7-15 = RFA The bits for supported categories are set to 1. Others are set to 0. */ /* target supported features Bit 0 = Category 1 Bit 1 = Category 2 Bit 2 = Category 3 Bit 3 = Category 4 Bit 4 = Player Application Settings. Bit 0 should be set for this bit to be set. Bit 5 = Group Navigation. Bit 0 should be set for this bit to be set. Bit 6 = Supports browsing*4 Bit 7 = Supports multiple media player applications Bit 8-15 = RFA The bits for supported categories are set to 1. Others are set to 0. */ static const char * default_avrcp_controller_service_name = "BTstack AVRCP Controller Service"; static const char * default_avrcp_controller_service_provider_name = "BTstack AVRCP Controller Service Provider"; static const char * default_avrcp_target_service_name = "BTstack AVRCP Target Service"; static const char * default_avrcp_target_service_provider_name = "BTstack AVRCP Target Service Provider"; static uint16_t avrcp_cid_counter = 0; static avrcp_context_t * sdp_query_context; static uint8_t attribute_value[1000]; static const unsigned int attribute_value_buffer_size = sizeof(attribute_value); static const char * avrcp_subunit_type_name[] = { "MONITOR", "AUDIO", "PRINTER", "DISC", "TAPE_RECORDER_PLAYER", "TUNER", "CA", "CAMERA", "RESERVED", "PANEL", "BULLETIN_BOARD", "CAMERA_STORAGE", "VENDOR_UNIQUE", "RESERVED_FOR_ALL_SUBUNIT_TYPES", "EXTENDED_TO_NEXT_BYTE", "UNIT", "ERROR" }; const char * avrcp_subunit2str(uint16_t index){ if (index <= 11) return avrcp_subunit_type_name[index]; if (index >= 0x1C && index <= 0x1F) return avrcp_subunit_type_name[index - 0x10]; return avrcp_subunit_type_name[16]; } static const char * avrcp_event_name[] = { "ERROR", "PLAYBACK_STATUS_CHANGED", "TRACK_CHANGED", "TRACK_REACHED_END", "TRACK_REACHED_START", "PLAYBACK_POS_CHANGED", "BATT_STATUS_CHANGED", "SYSTEM_STATUS_CHANGED", "PLAYER_APPLICATION_SETTING_CHANGED", "NOW_PLAYING_CONTENT_CHANGED", "AVAILABLE_PLAYERS_CHANGED", "ADDRESSED_PLAYER_CHANGED", "UIDS_CHANGED", "VOLUME_CHANGED" }; const char * avrcp_event2str(uint16_t index){ if (index <= 0x0d) return avrcp_event_name[index]; return avrcp_event_name[0]; } static const char * avrcp_operation_name[] = { "NOT SUPPORTED", // 0x3B "SKIP", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", "VOLUME_UP", "VOLUME_DOWN", "MUTE", "PLAY", "STOP", "PAUSE", "NOT SUPPORTED", "REWIND", "FAST_FORWARD", "NOT SUPPORTED", "FORWARD", "BACKWARD" // 0x4C }; const char * avrcp_operation2str(uint8_t index){ if (index >= 0x3B && index <= 0x4C) return avrcp_operation_name[index - 0x3B]; return avrcp_operation_name[0]; } static const char * avrcp_media_attribute_id_name[] = { "NONE", "TITLE", "ARTIST", "ALBUM", "TRACK", "TOTAL TRACKS", "GENRE", "SONG LENGTH" }; const char * avrcp_attribute2str(uint8_t index){ if (index >= 1 && index <= 7) return avrcp_media_attribute_id_name[index]; return avrcp_media_attribute_id_name[0]; } static const char * avrcp_play_status_name[] = { "STOPPED", "PLAYING", "PAUSED", "FORWARD SEEK", "REVERSE SEEK", "ERROR" // 0xFF }; const char * avrcp_play_status2str(uint8_t index){ if (index >= 1 && index <= 4) return avrcp_play_status_name[index]; return avrcp_play_status_name[5]; } static const char * avrcp_ctype_name[] = { "CONTROL", "STATUS", "SPECIFIC_INQUIRY", "NOTIFY", "GENERAL_INQUIRY", "RESERVED5", "RESERVED6", "RESERVED7", "NOT IMPLEMENTED IN REMOTE", "ACCEPTED BY REMOTE", "REJECTED BY REMOTE", "IN_TRANSITION", "IMPLEMENTED_STABLE", "CHANGED_STABLE", "RESERVED", "INTERIM" }; const char * avrcp_ctype2str(uint8_t index){ if (index < sizeof(avrcp_ctype_name)){ return avrcp_ctype_name[index]; } return "NONE"; } static const char * avrcp_shuffle_mode_name[] = { "SHUFFLE OFF", "SHUFFLE ALL TRACKS", "SHUFFLE GROUP" }; const char * avrcp_shuffle2str(uint8_t index){ if (index >= 1 && index <= 3) return avrcp_shuffle_mode_name[index-1]; return "NONE"; } static const char * avrcp_repeat_mode_name[] = { "REPEAT OFF", "REPEAT SINGLE TRACK", "REPEAT ALL TRACKS", "REPEAT GROUP" }; const char * avrcp_repeat2str(uint8_t index){ if (index >= 1 && index <= 4) return avrcp_repeat_mode_name[index-1]; return "NONE"; } uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size){ uint8_t cmd_opcode_index = 5; if (cmd_opcode_index > size) return AVRCP_CMD_OPCODE_UNDEFINED; return packet[cmd_opcode_index]; } void avrcp_create_sdp_record(uint8_t controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, const char * service_name, const char * service_provider_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); { if (controller){ de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER); } else { de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET); } } 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_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); } de_pop_sequence(attribute, l2cpProtocol); uint8_t* avctpProtocol = de_push_sequence(attribute); { de_add_number(avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // avctpProtocol_service de_add_number(avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version } de_pop_sequence(attribute, avctpProtocol); } 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 *avrcProfile = de_push_sequence(attribute); { de_add_number(avrcProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); de_add_number(avrcProfile, DE_UINT, DE_SIZE_16, 0x0105); } de_pop_sequence(attribute, avrcProfile); } de_pop_sequence(service, attribute); // 0x000d "Additional Bluetooth Profile Descriptor List" if (browsing){ de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS); attribute = de_push_sequence(service); { uint8_t * des = de_push_sequence(attribute); { uint8_t* browsing_l2cpProtocol = de_push_sequence(des); { de_add_number(browsing_l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); de_add_number(browsing_l2cpProtocol, DE_UINT, DE_SIZE_16, PSM_AVCTP_BROWSING); } de_pop_sequence(des, browsing_l2cpProtocol); uint8_t* browsing_avctpProtocol = de_push_sequence(des); { de_add_number(browsing_avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // browsing_avctpProtocol_service de_add_number(browsing_avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version } de_pop_sequence(des, browsing_avctpProtocol); } de_pop_sequence(attribute, des); } de_pop_sequence(service, attribute); } // 0x0100 "Service Name" de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); if (service_name){ de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); } else { if (controller){ de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_name), (uint8_t *) default_avrcp_controller_service_name); } else { de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_name), (uint8_t *) default_avrcp_target_service_name); } } // 0x0100 "Provider Name" de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); if (service_provider_name){ de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); } else { if (controller){ de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_provider_name), (uint8_t *) default_avrcp_controller_service_provider_name); } else { de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_provider_name), (uint8_t *) default_avrcp_target_service_provider_name); } } // 0x0311 "Supported Features" de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); } avrcp_connection_t * get_avrcp_connection_for_bd_addr(bd_addr_t addr, avrcp_context_t * context){ btstack_linked_list_iterator_t it; btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); while (btstack_linked_list_iterator_has_next(&it)){ avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); if (memcmp(addr, connection->remote_addr, 6) != 0) continue; return connection; } return NULL; } avrcp_connection_t * get_avrcp_connection_for_l2cap_signaling_cid(uint16_t l2cap_cid, avrcp_context_t * context){ btstack_linked_list_iterator_t it; btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); while (btstack_linked_list_iterator_has_next(&it)){ avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); if (connection->l2cap_signaling_cid != l2cap_cid) continue; return connection; } return NULL; } avrcp_connection_t * get_avrcp_connection_for_avrcp_cid(uint16_t avrcp_cid, avrcp_context_t * context){ btstack_linked_list_iterator_t it; btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); while (btstack_linked_list_iterator_has_next(&it)){ avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); if (connection->avrcp_cid != avrcp_cid) continue; return connection; } return NULL; } void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ connection->wait_to_send = 1; l2cap_request_can_send_now_event(l2cap_cid); } uint16_t avrcp_get_next_cid(void){ avrcp_cid_counter++; if (avrcp_cid_counter == 0){ avrcp_cid_counter = 1; } return avrcp_cid_counter; } static avrcp_connection_t * avrcp_create_connection(bd_addr_t remote_addr, avrcp_context_t * context){ avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); if (!connection){ log_error("avrcp: not enough memory to create connection"); return NULL; } memset(connection, 0, sizeof(avrcp_connection_t)); connection->state = AVCTP_CONNECTION_IDLE; connection->transaction_label = 0xFF; connection->avrcp_cid = avrcp_get_next_cid(); memcpy(connection->remote_addr, remote_addr, 6); btstack_linked_list_add(&context->connections, (btstack_linked_item_t *) connection); return connection; } void avrcp_emit_connection_established(btstack_packet_handler_t callback, uint16_t avrcp_cid, bd_addr_t addr, uint8_t status){ if (!callback) return; uint8_t event[12]; int pos = 0; event[pos++] = HCI_EVENT_AVRCP_META; event[pos++] = sizeof(event) - 2; event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; event[pos++] = status; reverse_bd_addr(addr,&event[pos]); pos += 6; little_endian_store_16(event, pos, avrcp_cid); pos += 2; (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); } void avrcp_emit_connection_closed(btstack_packet_handler_t callback, uint16_t avrcp_cid){ if (!callback) return; uint8_t event[5]; int pos = 0; event[pos++] = HCI_EVENT_AVRCP_META; event[pos++] = sizeof(event) - 2; event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; little_endian_store_16(event, pos, avrcp_cid); pos += 2; (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); } void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(sdp_query_context->avrcp_cid, sdp_query_context); if (!connection) return; if (connection->state != AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE) return; UNUSED(packet_type); UNUSED(channel); UNUSED(size); uint8_t status; des_iterator_t des_list_it; des_iterator_t prot_it; // uint32_t avdtp_remote_uuid = 0; switch (hci_event_packet_get_type(packet)){ case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: // Handle new SDP record if (sdp_event_query_attribute_byte_get_record_id(packet) != sdp_query_context->record_id) { sdp_query_context->record_id = sdp_event_query_attribute_byte_get_record_id(packet); sdp_query_context->parse_sdp_record = 0; // log_info("SDP Record: Nr: %d", record_id); } 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_SERVICE_CLASS_ID_LIST: if (de_get_element_type(attribute_value) != DE_DES) break; for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { uint8_t * element = des_iterator_get_element(&des_list_it); if (de_get_element_type(element) != DE_UUID) continue; uint32_t uuid = de_get_uuid32(element); switch (uuid){ case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: if (sdp_query_context->role == AVRCP_CONTROLLER) { sdp_query_context->parse_sdp_record = 1; break; } break; case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: if (sdp_query_context->role == AVRCP_TARGET) { sdp_query_context->parse_sdp_record = 1; break; } break; default: break; } } break; case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { if (!sdp_query_context->parse_sdp_record) break; // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { uint8_t *des_element; uint8_t *element; uint32_t uuid; if (des_iterator_get_type(&des_list_it) != DE_DES) continue; des_element = des_iterator_get_element(&des_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), &sdp_query_context->avrcp_l2cap_psm); break; case BLUETOOTH_PROTOCOL_AVCTP: if (!des_iterator_has_more(&prot_it)) continue; des_iterator_next(&prot_it); de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_version); break; default: break; } } } break; case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: { // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); if (!sdp_query_context->parse_sdp_record) break; if (de_get_element_type(attribute_value) != DE_DES) break; des_iterator_t des_list_0_it; uint8_t *element_0; des_iterator_init(&des_list_0_it, attribute_value); element_0 = des_iterator_get_element(&des_list_0_it); for (des_iterator_init(&des_list_it, element_0); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { uint8_t *des_element; uint8_t *element; uint32_t uuid; if (des_iterator_get_type(&des_list_it) != DE_DES) continue; des_element = des_iterator_get_element(&des_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), &connection->browsing_l2cap_psm); break; case BLUETOOTH_PROTOCOL_AVCTP: if (!des_iterator_has_more(&prot_it)) continue; des_iterator_next(&prot_it); de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->browsing_version); break; default: break; } } } break; default: break; } } } else { log_error("SDP attribute value buffer size exceeded: available %d, required %d", attribute_value_buffer_size, sdp_event_query_attribute_byte_get_attribute_length(packet)); } break; case SDP_EVENT_QUERY_COMPLETE:{ status = sdp_event_query_complete_get_status(packet); if (status != ERROR_CODE_SUCCESS){ avrcp_emit_connection_established(sdp_query_context->avrcp_callback, connection->avrcp_cid, connection->remote_addr, status); btstack_linked_list_remove(&sdp_query_context->connections, (btstack_linked_item_t*) connection); btstack_memory_avrcp_connection_free(connection); log_info("AVRCP: SDP query failed with status 0x%02x.", status); break; } if (!sdp_query_context->parse_sdp_record){ connection->state = AVCTP_CONNECTION_IDLE; avrcp_emit_connection_established(sdp_query_context->avrcp_callback, connection->avrcp_cid, connection->remote_addr, SDP_SERVICE_NOT_FOUND); btstack_linked_list_remove(&sdp_query_context->connections, (btstack_linked_item_t*) connection); btstack_memory_avrcp_connection_free(connection); break; } // log_info("AVRCP Control PSM 0x%02x, Browsing PSM 0x%02x", sdp_query_context->avrcp_l2cap_psm, sdp_query_context->browsing_l2cap_psm); connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; l2cap_create_channel(sdp_query_context->packet_handler, connection->remote_addr, sdp_query_context->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); break; } } } void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avrcp_context_t * context){ UNUSED(channel); UNUSED(size); bd_addr_t event_addr; uint16_t local_cid; uint8_t status; avrcp_connection_t * connection = NULL; if (packet_type != HCI_EVENT_PACKET) return; switch (hci_event_packet_get_type(packet)) { case HCI_EVENT_DISCONNECTION_COMPLETE: avrcp_emit_connection_closed(context->avrcp_callback, 0); break; case L2CAP_EVENT_INCOMING_CONNECTION: l2cap_event_incoming_connection_get_address(packet, event_addr); local_cid = l2cap_event_incoming_connection_get_local_cid(packet); connection = avrcp_create_connection(event_addr, context); if (!connection) { log_error("Failed to alloc connection structure"); l2cap_decline_connection(local_cid); break; } connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; connection->l2cap_signaling_cid = local_cid; log_info("L2CAP_EVENT_INCOMING_CONNECTION avrcp_cid 0x%02x, l2cap_signaling_cid 0x%02x", connection->avrcp_cid, connection->l2cap_signaling_cid); l2cap_accept_connection(local_cid); break; case L2CAP_EVENT_CHANNEL_OPENED: l2cap_event_channel_opened_get_address(packet, event_addr); status = l2cap_event_channel_opened_get_status(packet); local_cid = l2cap_event_channel_opened_get_local_cid(packet); connection = get_avrcp_connection_for_bd_addr(event_addr, context); if (!connection){ log_error("Failed to alloc AVRCP connection structure"); avrcp_emit_connection_established(context->avrcp_callback, connection->avrcp_cid, event_addr, BTSTACK_MEMORY_ALLOC_FAILED); l2cap_disconnect(local_cid, 0); // reason isn't used break; } if (status != ERROR_CODE_SUCCESS){ log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); avrcp_emit_connection_established(context->avrcp_callback, connection->avrcp_cid, event_addr, status); btstack_linked_list_remove(&context->connections, (btstack_linked_item_t*) connection); btstack_memory_avrcp_connection_free(connection); break; } connection->l2cap_signaling_cid = local_cid; connection->song_length_ms = 0xFFFFFFFF; connection->song_position_ms = 0xFFFFFFFF; connection->playback_status = AVRCP_PLAYBACK_STATUS_ERROR; log_info("L2CAP_EVENT_CHANNEL_OPENED avrcp_cid 0x%02x, l2cap_signaling_cid 0x%02x", connection->avrcp_cid, connection->l2cap_signaling_cid); connection->state = AVCTP_CONNECTION_OPENED; avrcp_emit_connection_established(context->avrcp_callback, connection->avrcp_cid, event_addr, ERROR_CODE_SUCCESS); break; case L2CAP_EVENT_CHANNEL_CLOSED: // data: event (8), len(8), channel (16) local_cid = l2cap_event_channel_closed_get_local_cid(packet); connection = get_avrcp_connection_for_l2cap_signaling_cid(local_cid, context); if (connection){ avrcp_emit_connection_closed(context->avrcp_callback, connection->avrcp_cid); // free connection btstack_linked_list_remove(&context->connections, (btstack_linked_item_t*) connection); btstack_memory_avrcp_connection_free(connection); break; } break; default: break; } } uint8_t avrcp_connect(bd_addr_t bd_addr, avrcp_context_t * context, uint16_t * avrcp_cid){ avrcp_connection_t * connection = get_avrcp_connection_for_bd_addr(bd_addr, context); if (connection){ return ERROR_CODE_COMMAND_DISALLOWED; } connection = avrcp_create_connection(bd_addr, context); if (!connection){ log_error("avrcp: could not allocate connection struct."); return BTSTACK_MEMORY_ALLOC_FAILED; } if (!avrcp_cid) return L2CAP_LOCAL_CID_DOES_NOT_EXIST; *avrcp_cid = connection->avrcp_cid; connection->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; context->avrcp_l2cap_psm = 0; context->avrcp_version = 0; context->avrcp_cid = connection->avrcp_cid; connection->browsing_l2cap_psm = 0; sdp_query_context = context; return sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, bd_addr, BLUETOOTH_PROTOCOL_AVCTP); }