Merge "[GATT Server] Use TransportIndex instead of conn_id in API" am:... (d8ed0cc3) · Commits · e / os / android_packages_modules_Bluetooth

system/rust/build.rs

+4 −0

Original line number	Diff line number	Diff line
		//! Build file to generate packets
		//!
		//! Run `cargo install .` in `tools/pdl` to ensure `pdl` is in your
		//! path.
		use std::{
		env,
		fs::File,

system/rust/src/gatt/arbiter.rs

+48 −27

Original line number	Diff line number	Diff line
		@@ -90,13 +90,15 @@ impl Arbiter {
		}

		/// Test to see if a buffer contains a valid ATT packet with an opcode we
		/// are interested in intercepting (those intended for servers)
		/// are interested in intercepting (those intended for servers that are isolated)
		pub fn try_parse_att_server_packet(
		&self,
		tcb_idx: TransportIndex,
		packet: Box<[u8]>,
		) -> Option<(OwnedAttView, ConnectionId)> {
		let conn_id = *self.transport_to_owned_connection.get(&tcb_idx)?;
		) -> Option<OwnedAttView> {
		if !self.transport_to_owned_connection.contains_key(&tcb_idx) {
		return None;
		}

		let att = OwnedAttView::try_parse(packet).ok()?;

		@@ -108,7 +110,7 @@ impl Arbiter {

		match classify_opcode(att.view().get_opcode()) {
		OperationType::Command \| OperationType::Request \| OperationType::Confirmation => {
		Some((att, conn_id))
		Some(att)
		}
		_ => None,
		}
		@@ -135,10 +137,10 @@ impl Arbiter {
		Some(conn_id)
		}

		/// Handle a disconnection and return the disconnected conn_id, if any
		pub fn on_le_disconnect(&mut self, tcb_idx: TransportIndex) -> Option<ConnectionId> {
		/// Handle a disconnection, if any, and return whether the disconnection was registered
		pub fn on_le_disconnect(&mut self, tcb_idx: TransportIndex) -> bool {
		info!("processing disconnection on transport {tcb_idx:?}");
		self.transport_to_owned_connection.remove(&tcb_idx)
		self.transport_to_owned_connection.remove(&tcb_idx).is_some()
		}

		/// Look up the conn_id for a given tcb_idx, if present
		@@ -160,10 +162,10 @@ fn on_le_connect(tcb_idx: u8, advertiser: u8) {
		}

		fn on_le_disconnect(tcb_idx: u8) {
		if let Some(conn_id) = with_arbiter(\|arbiter\| arbiter.on_le_disconnect(TransportIndex(tcb_idx)))
		{
		let tcb_idx = TransportIndex(tcb_idx);
		if with_arbiter(\|arbiter\| arbiter.on_le_disconnect(tcb_idx)) {
		do_in_rust_thread(move \|modules\| {
		if let Err(err) = modules.gatt_module.on_le_disconnect(conn_id) {
		if let Err(err) = modules.gatt_module.on_le_disconnect(tcb_idx) {
		error!("{err:?}")
		}
		})
		@@ -171,15 +173,16 @@ fn on_le_disconnect(tcb_idx: u8) {
		}

		fn intercept_packet(tcb_idx: u8, packet: Vec<u8>) -> InterceptAction {
		if let Some((att, conn_id)) = with_arbiter(\|arbiter\| {
		arbiter.try_parse_att_server_packet(TransportIndex(tcb_idx), packet.into_boxed_slice())
		let tcb_idx = TransportIndex(tcb_idx);
		if let Some(att) = with_arbiter(\|arbiter\| {
		arbiter.try_parse_att_server_packet(tcb_idx, packet.into_boxed_slice())
		}) {
		do_in_rust_thread(move \|modules\| {
		trace!("pushing packet to GATT");
		if let Some(bearer) = modules.gatt_module.get_bearer(conn_id) {
		if let Some(bearer) = modules.gatt_module.get_bearer(tcb_idx) {
		bearer.handle_packet(att.view())
		} else {
		error!("{conn_id:?} closed, bearer does not exist");
		error!("Bearer for {tcb_idx:?} not found");
		}
		});
		InterceptAction::Drop
		@@ -189,10 +192,10 @@ fn intercept_packet(tcb_idx: u8, packet: Vec<u8>) -> InterceptAction {
		}

		fn on_mtu_event(tcb_idx: TransportIndex, event: MtuEvent) {
		if let Some(conn_id) = with_arbiter(\|arbiter\| arbiter.get_conn_id(tcb_idx)) {
		if with_arbiter(\|arbiter\| arbiter.get_conn_id(tcb_idx)).is_some() {
		do_in_rust_thread(move \|modules\| {
		let Some(bearer) = modules.gatt_module.get_bearer(conn_id) else {
		error!("Bearer for {conn_id:?} not found");
		let Some(bearer) = modules.gatt_module.get_bearer(tcb_idx) else {
		error!("Bearer for {tcb_idx:?} not found");
		return;
		};
		if let Err(err) = bearer.handle_mtu_event(event) {
		@@ -215,12 +218,13 @@ mod test {
		};

		const TCB_IDX: TransportIndex = TransportIndex(1);
		const ADVERTISER_ID: AdvertiserId = AdvertiserId(2);
		const SERVER_ID: ServerId = ServerId(3);
		const ANOTHER_TCB_IDX: TransportIndex = TransportIndex(2);
		const ADVERTISER_ID: AdvertiserId = AdvertiserId(3);
		const SERVER_ID: ServerId = ServerId(4);

		const CONN_ID: ConnectionId = ConnectionId::new(TCB_IDX, SERVER_ID);

		const ANOTHER_ADVERTISER_ID: AdvertiserId = AdvertiserId(4);
		const ANOTHER_ADVERTISER_ID: AdvertiserId = AdvertiserId(5);

		#[test]
		fn test_non_isolated_connect() {
		@@ -256,9 +260,9 @@ mod test {
		let mut arbiter = Arbiter::new();
		arbiter.on_le_connect(TCB_IDX, ADVERTISER_ID);

		let conn_id = arbiter.on_le_disconnect(TCB_IDX);
		let ok = arbiter.on_le_disconnect(TCB_IDX);

		assert!(conn_id.is_none())
		assert!(!ok)
		}

		#[test]
		@@ -267,9 +271,9 @@ mod test {
		arbiter.associate_server_with_advertiser(SERVER_ID, ADVERTISER_ID);
		arbiter.on_le_connect(TCB_IDX, ADVERTISER_ID);

		let conn_id = arbiter.on_le_disconnect(TCB_IDX);
		let ok = arbiter.on_le_disconnect(TCB_IDX);

		assert_eq!(conn_id, Some(CONN_ID));
		assert!(ok)
		}

		#[test]
		@@ -348,7 +352,7 @@ mod test {

		let out = arbiter.try_parse_att_server_packet(TCB_IDX, packet.to_vec().unwrap().into());

		assert!(matches!(out, Some((_, CONN_ID))));
		assert!(out.is_some());
		}

		#[test]
		@@ -396,6 +400,23 @@ mod test {
		assert!(out.is_none());
		}

		#[test]
		fn test_packet_bypass_when_different_connection() {
		let mut arbiter = Arbiter::new();
		arbiter.associate_server_with_advertiser(SERVER_ID, ADVERTISER_ID);
		arbiter.on_le_connect(TCB_IDX, ADVERTISER_ID);
		arbiter.on_le_connect(ANOTHER_TCB_IDX, ANOTHER_ADVERTISER_ID);
		let packet = AttBuilder {
		opcode: AttOpcode::READ_REQUEST,
		_child_: AttReadRequestBuilder { attribute_handle: AttHandle(1).into() }.into(),
		};

		let out =
		arbiter.try_parse_att_server_packet(ANOTHER_TCB_IDX, packet.to_vec().unwrap().into());

		assert!(out.is_none());
		}

		#[test]
		fn test_packet_capture_when_isolated_after_advertiser_closes() {
		let mut arbiter = Arbiter::new();
		@@ -409,7 +430,7 @@ mod test {

		let out = arbiter.try_parse_att_server_packet(TCB_IDX, packet.to_vec().unwrap().into());

		assert!(matches!(out, Some((_, CONN_ID))));
		assert!(out.is_some());
		}

		#[test]
		@@ -425,7 +446,7 @@ mod test {

		let out = arbiter.try_parse_att_server_packet(TCB_IDX, packet.to_vec().unwrap().into());

		assert!(matches!(out, Some((_, CONN_ID))));
		assert!(out.is_some());
		}

		#[test]

system/rust/src/gatt/callbacks.rs

+26 −26

Original line number	Diff line number	Diff line
		@@ -13,7 +13,7 @@ use crate::packets::{AttAttributeDataChild, AttAttributeDataView, AttErrorCode};

		use super::{
		ffi::AttributeBackingType,
		ids::{AttHandle, ConnectionId, TransactionId},
		ids::{AttHandle, ConnectionId, TransactionId, TransportIndex},
		server::IndicationError,
		};

		@@ -98,7 +98,7 @@ pub trait RawGattDatastore {
		/// Read a characteristic from the specified connection at the given handle.
		async fn read(
		&self,
		conn_id: ConnectionId,
		tcb_idx: TransportIndex,
		handle: AttHandle,
		offset: u32,
		attr_type: AttributeBackingType,
		@@ -107,7 +107,7 @@ pub trait RawGattDatastore {
		/// Write data to a given characteristic on the specified connection.
		async fn write(
		&self,
		conn_id: ConnectionId,
		tcb_idx: TransportIndex,
		handle: AttHandle,
		attr_type: AttributeBackingType,
		write_type: GattWriteRequestType,
		@@ -118,7 +118,7 @@ pub trait RawGattDatastore {
		/// for a response from the upper layer.
		fn write_no_response(
		&self,
		conn_id: ConnectionId,
		tcb_idx: TransportIndex,
		handle: AttHandle,
		attr_type: AttributeBackingType,
		data: AttAttributeDataView<'_>,
		@@ -127,7 +127,7 @@ pub trait RawGattDatastore {
		/// Execute or cancel any prepared writes
		async fn execute(
		&self,
		conn_id: ConnectionId,
		tcb_idx: TransportIndex,
		decision: TransactionDecision,
		) -> Result<(), AttErrorCode>;
		}
		@@ -139,7 +139,7 @@ pub trait GattDatastore {
		/// Read a characteristic from the specified connection at the given handle.
		async fn read(
		&self,
		conn_id: ConnectionId,
		tcb_idx: TransportIndex,
		handle: AttHandle,
		attr_type: AttributeBackingType,
		) -> Result<AttAttributeDataChild, AttErrorCode>;
		@@ -147,7 +147,7 @@ pub trait GattDatastore {
		/// Write data to a given characteristic on the specified connection.
		async fn write(
		&self,
		conn_id: ConnectionId,
		tcb_idx: TransportIndex,
		handle: AttHandle,
		attr_type: AttributeBackingType,
		data: AttAttributeDataView<'_>,
		@@ -159,7 +159,7 @@ impl<T: GattDatastore + ?Sized> RawGattDatastore for T {
		/// Read a characteristic from the specified connection at the given handle.
		async fn read(
		&self,
		conn_id: ConnectionId,
		tcb_idx: TransportIndex,
		handle: AttHandle,
		offset: u32,
		attr_type: AttributeBackingType,
		@@ -168,13 +168,13 @@ impl<T: GattDatastore + ?Sized> RawGattDatastore for T {
		warn!("got read blob request for non-long attribute {handle:?}");
		return Err(AttErrorCode::ATTRIBUTE_NOT_LONG);
		}
		self.read(conn_id, handle, attr_type).await
		self.read(tcb_idx, handle, attr_type).await
		}

		/// Write data to a given characteristic on the specified connection.
		async fn write(
		&self,
		conn_id: ConnectionId,
		tcb_idx: TransportIndex,
		handle: AttHandle,
		attr_type: AttributeBackingType,
		write_type: GattWriteRequestType,
		@@ -182,26 +182,26 @@ impl<T: GattDatastore + ?Sized> RawGattDatastore for T {
		) -> Result<(), AttErrorCode> {
		match write_type {
		GattWriteRequestType::Prepare { .. } => {
		warn!("got prepare write attempt to characteristic {handle:?} not supporting write_without_response");
		warn!("got prepare write attempt on {tcb_idx:?} to characteristic {handle:?} not supporting write_without_response");
		Err(AttErrorCode::WRITE_REQUEST_REJECTED)
		}
		GattWriteRequestType::Request => self.write(conn_id, handle, attr_type, data).await,
		GattWriteRequestType::Request => self.write(tcb_idx, handle, attr_type, data).await,
		}
		}

		fn write_no_response(
		&self,
		conn_id: ConnectionId,
		tcb_idx: TransportIndex,
		handle: AttHandle,
		_: AttributeBackingType,
		_: AttAttributeDataView<'_>,
		) {
		// silently drop, since there's no way to return an error
		warn!("got write command on {conn_id:?} to characteristic {handle:?} not supporting write_without_response");
		warn!("got write command on {tcb_idx:?} to characteristic {handle:?} not supporting write_without_response");
		}

		/// Execute or cancel any prepared writes
		async fn execute(&self, _: ConnectionId, _: TransactionDecision) -> Result<(), AttErrorCode> {
		async fn execute(&self, _: TransportIndex, _: TransactionDecision) -> Result<(), AttErrorCode> {
		// we never do prepared writes, so who cares
		return Ok(());
		}
		@@ -222,7 +222,7 @@ mod test {

		use super::*;

		const CONN_ID: ConnectionId = ConnectionId(1);
		const TCB_IDX: TransportIndex = TransportIndex(1);
		const HANDLE: AttHandle = AttHandle(1);
		const DATA: [u8; 4] = [1, 2, 3, 4];

		@@ -236,7 +236,7 @@ mod test {
		spawn_local(async move {
		RawGattDatastore::read(
		&datastore,
		CONN_ID,
		TCB_IDX,
		HANDLE,
		0,
		AttributeBackingType::Characteristic,
		@@ -248,7 +248,7 @@ mod test {
		// assert: got read event
		assert!(matches!(
		resp,
		MockDatastoreEvents::Read(CONN_ID, HANDLE, AttributeBackingType::Characteristic, _)
		MockDatastoreEvents::Read(TCB_IDX, HANDLE, AttributeBackingType::Characteristic, _)
		));
		});
		}
		@@ -263,7 +263,7 @@ mod test {
		let pending = spawn_local(async move {
		RawGattDatastore::read(
		&datastore,
		CONN_ID,
		TCB_IDX,
		HANDLE,
		0,
		AttributeBackingType::Characteristic,
		@@ -289,7 +289,7 @@ mod test {
		// act: send read blob request
		let resp = block_on_locally(RawGattDatastore::read(
		&datastore,
		CONN_ID,
		TCB_IDX,
		HANDLE,
		1,
		AttributeBackingType::Characteristic,
		@@ -315,7 +315,7 @@ mod test {
		spawn_local(async move {
		RawGattDatastore::write(
		&datastore,
		CONN_ID,
		TCB_IDX,
		HANDLE,
		AttributeBackingType::Characteristic,
		GattWriteRequestType::Request,
		@@ -329,7 +329,7 @@ mod test {
		assert!(matches!(
		resp,
		MockDatastoreEvents::Write(
		CONN_ID,
		TCB_IDX,
		HANDLE,
		AttributeBackingType::Characteristic,
		_,
		@@ -349,7 +349,7 @@ mod test {
		let pending = spawn_local(async move {
		RawGattDatastore::write(
		&datastore,
		CONN_ID,
		TCB_IDX,
		HANDLE,
		AttributeBackingType::Characteristic,
		GattWriteRequestType::Request,
		@@ -376,7 +376,7 @@ mod test {
		// act: send prepare write request
		let resp = block_on_locally(RawGattDatastore::write(
		&datastore,
		CONN_ID,
		TCB_IDX,
		HANDLE,
		AttributeBackingType::Characteristic,
		GattWriteRequestType::Prepare { offset: 1 },
		@@ -397,7 +397,7 @@ mod test {
		// act: send write command
		RawGattDatastore::write_no_response(
		&datastore,
		CONN_ID,
		TCB_IDX,
		HANDLE,
		AttributeBackingType::Characteristic,
		make_data().view(),
		@@ -415,7 +415,7 @@ mod test {
		// act: send execute request
		let resp = block_on_locally(RawGattDatastore::execute(
		&datastore,
		CONN_ID,
		TCB_IDX,
		TransactionDecision::Execute,
		));

system/rust/src/gatt/callbacks/callback_transaction_manager.rs

+58 −21

Original line number	Diff line number	Diff line
		@@ -6,7 +6,7 @@ use tokio::{sync::oneshot, time::timeout};

		use crate::{
		gatt::{
		ids::{AttHandle, ConnectionId, TransactionId},
		ids::{AttHandle, ConnectionId, ServerId, TransactionId, TransportIndex},
		GattCallbacks,
		},
		packets::{AttAttributeDataChild, AttAttributeDataView, AttErrorCode},
		@@ -48,7 +48,7 @@ const TIMEOUT: Duration = Duration::from_secs(15);
		/// The cause of a failure to dispatch a call to send_response()
		#[derive(Debug, PartialEq, Eq)]
		pub enum CallbackResponseError {
		/// The TransactionId supplied was invalid
		/// The TransactionId supplied was invalid for the specified connection
		NonExistentTransaction(TransactionId),
		/// The TransactionId was valid but has since terminated
		ListenerHungUp(TransactionId),
		@@ -86,6 +86,11 @@ impl CallbackTransactionManager {
		Err(CallbackResponseError::NonExistentTransaction(trans_id))
		}
		}

		/// Get an impl GattDatastore tied to a particular server
		pub fn get_datastore(self: &Rc<Self>, server_id: ServerId) -> impl RawGattDatastore {
		GattDatastoreImpl { callback_transaction_manager: self.clone(), server_id }
		}
		}

		impl PendingTransactionsState {
		@@ -124,37 +129,58 @@ impl PendingTransactionWatcher {
		}
		}

		struct GattDatastoreImpl {
		callback_transaction_manager: Rc<CallbackTransactionManager>,
		server_id: ServerId,
		}

		#[async_trait(?Send)]
		impl RawGattDatastore for CallbackTransactionManager {
		impl RawGattDatastore for GattDatastoreImpl {
		async fn read(
		&self,
		conn_id: ConnectionId,
		tcb_idx: TransportIndex,
		handle: AttHandle,
		offset: u32,
		attr_type: AttributeBackingType,
		) -> Result<AttAttributeDataChild, AttErrorCode> {
		let pending_transaction =
		self.pending_transactions.borrow_mut().start_new_transaction(conn_id);
		let conn_id = ConnectionId::new(tcb_idx, self.server_id);

		let pending_transaction = self
		.callback_transaction_manager
		.pending_transactions
		.borrow_mut()
		.start_new_transaction(conn_id);
		let trans_id = pending_transaction.trans_id;

		self.callbacks.on_server_read(conn_id, trans_id, handle, attr_type, offset);
		self.callback_transaction_manager.callbacks.on_server_read(
		ConnectionId::new(tcb_idx, self.server_id),
		trans_id,
		handle,
		attr_type,
		offset,
		);

		pending_transaction.wait(self).await
		pending_transaction.wait(&self.callback_transaction_manager).await
		}

		async fn write(
		&self,
		conn_id: ConnectionId,
		tcb_idx: TransportIndex,
		handle: AttHandle,
		attr_type: AttributeBackingType,
		write_type: GattWriteRequestType,
		data: AttAttributeDataView<'_>,
		) -> Result<(), AttErrorCode> {
		let pending_transaction =
		self.pending_transactions.borrow_mut().start_new_transaction(conn_id);
		let conn_id = ConnectionId::new(tcb_idx, self.server_id);

		let pending_transaction = self
		.callback_transaction_manager
		.pending_transactions
		.borrow_mut()
		.start_new_transaction(conn_id);
		let trans_id = pending_transaction.trans_id;

		self.callbacks.on_server_write(
		self.callback_transaction_manager.callbacks.on_server_write(
		conn_id,
		trans_id,
		handle,
		@@ -164,18 +190,24 @@ impl RawGattDatastore for CallbackTransactionManager {
		);

		// the data passed back is irrelevant for write requests
		pending_transaction.wait(self).await.map(\|_\| ())
		pending_transaction.wait(&self.callback_transaction_manager).await.map(\|_\| ())
		}

		fn write_no_response(
		&self,
		conn_id: ConnectionId,
		tcb_idx: TransportIndex,
		handle: AttHandle,
		attr_type: AttributeBackingType,
		data: AttAttributeDataView<'_>,
		) {
		let trans_id = self.pending_transactions.borrow_mut().alloc_transaction_id();
		self.callbacks.on_server_write(
		let conn_id = ConnectionId::new(tcb_idx, self.server_id);

		let trans_id = self
		.callback_transaction_manager
		.pending_transactions
		.borrow_mut()
		.alloc_transaction_id();
		self.callback_transaction_manager.callbacks.on_server_write(
		conn_id,
		trans_id,
		handle,
		@@ -187,16 +219,21 @@ impl RawGattDatastore for CallbackTransactionManager {

		async fn execute(
		&self,
		conn_id: ConnectionId,
		tcb_idx: TransportIndex,
		decision: TransactionDecision,
		) -> Result<(), AttErrorCode> {
		let pending_transaction =
		self.pending_transactions.borrow_mut().start_new_transaction(conn_id);
		let conn_id = ConnectionId::new(tcb_idx, self.server_id);

		let pending_transaction = self
		.callback_transaction_manager
		.pending_transactions
		.borrow_mut()
		.start_new_transaction(conn_id);
		let trans_id = pending_transaction.trans_id;

		self.callbacks.on_execute(conn_id, trans_id, decision);
		self.callback_transaction_manager.callbacks.on_execute(conn_id, trans_id, decision);

		// the data passed back is irrelevant for execute requests
		pending_transaction.wait(self).await.map(\|_\| ())
		pending_transaction.wait(&self.callback_transaction_manager).await.map(\|_\| ())
		}
		}

system/rust/src/gatt/ffi.rs

+2 −2

Original line number	Diff line number	Diff line
		@@ -392,7 +392,7 @@ fn add_service(server_id: u8, service_records: Vec<GattRecord>) {
		let ok = modules.gatt_module.register_gatt_service(
		server_id,
		service.clone(),
		modules.gatt_incoming_callbacks.clone(),
		modules.gatt_incoming_callbacks.get_datastore(server_id),
		);
		match ok {
		Ok(_) => info!(
		@@ -477,7 +477,7 @@ fn send_indication(_server_id: u8, handle: u16, conn_id: u16, value: &[u8]) {
		trace!("send_indication {handle:?}, {conn_id:?}");

		do_in_rust_thread(move \|modules\| {
		let Some(bearer) = modules.gatt_module.get_bearer(conn_id) else {
		let Some(bearer) = modules.gatt_module.get_bearer(conn_id.get_tcb_idx()) else {
		error!("connection {conn_id:?} does not exist");
		return;
		};