Manage lifecycle of CIS and SCO links in host

bumble/device.py

@@ -3078,34 +3078,30 @@ async def create_cis(self, cis_acl_pairs: List[Tuple[int, int]]) -> List[CisLink
                 cig_id=cig_id,
             )
 
-        result = await self.send_command(
-            HCI_LE_Create_CIS_Command(
-                cis_connection_handle=[p[0] for p in cis_acl_pairs],
-                acl_connection_handle=[p[1] for p in cis_acl_pairs],
-            ),
-        )
-        if result.status != HCI_COMMAND_STATUS_PENDING:
-            logger.warning(
-                'HCI_LE_Create_CIS_Command failed: '
-                f'{HCI_Constant.error_name(result.status)}'
-            )
-            raise HCI_StatusError(result)
-
-        pending_cis_establishments: Dict[int, asyncio.Future[CisLink]] = {}
-        for cis_handle, _ in cis_acl_pairs:
-            pending_cis_establishments[
-                cis_handle
-            ] = asyncio.get_running_loop().create_future()
-
         with closing(EventWatcher()) as watcher:
+            pending_cis_establishments = {
+                cis_handle: asyncio.get_running_loop().create_future()
+                for cis_handle, _ in cis_acl_pairs
+            }
 
             @watcher.on(self, 'cis_establishment')
             def on_cis_establishment(cis_link: CisLink) -> None:
-                if pending_future := pending_cis_establishments.get(
-                    cis_link.handle, None
-                ):
+                if pending_future := pending_cis_establishments.get(cis_link.handle):
                     pending_future.set_result(cis_link)
 
+            result = await self.send_command(
+                HCI_LE_Create_CIS_Command(
+                    cis_connection_handle=[p[0] for p in cis_acl_pairs],
+                    acl_connection_handle=[p[1] for p in cis_acl_pairs],
+                ),
+            )
+            if result.status != HCI_COMMAND_STATUS_PENDING:
+                logger.warning(
+                    'HCI_LE_Create_CIS_Command failed: '
+                    f'{HCI_Constant.error_name(result.status)}'
+                )
+                raise HCI_StatusError(result)
+
             return await asyncio.gather(*pending_cis_establishments.values())
 
     # [LE only]
@@ -3753,7 +3749,7 @@ def on_sco_connection_failure(
     @host_event_handler
     @experimental('Only for testing')
     def on_sco_packet(self, sco_handle: int, packet: HCI_SynchronousDataPacket) -> None:
-        if sco_link := self.sco_links.get(sco_handle, None):
+        if sco_link := self.sco_links.get(sco_handle):
             sco_link.emit('pdu', packet)
 
     # [LE only]
@@ -3833,15 +3829,15 @@ def on_cis_establishment(self, cis_handle: int) -> None:
     @experimental('Only for testing')
     def on_cis_establishment_failure(self, cis_handle: int, status: int) -> None:
         logger.debug(f'*** CIS Establishment Failure: cis=[0x{cis_handle:04X}] ***')
-        if cis_link := self.cis_links.pop(cis_handle, None):
+        if cis_link := self.cis_links.pop(cis_handle):
             cis_link.emit('establishment_failure')
         self.emit('cis_establishment_failure', cis_handle, status)
 
     # [LE only]
     @host_event_handler
     @experimental('Only for testing')
     def on_iso_packet(self, handle: int, packet: HCI_IsoDataPacket) -> None:
-        if cis_link := self.cis_links.get(handle, None):
+        if cis_link := self.cis_links.get(handle):
             cis_link.emit('pdu', packet)
 
     @host_event_handler

bumble/host.py

@@ -18,6 +18,7 @@
 from __future__ import annotations
 import asyncio
 import collections
+import dataclasses
 import logging
 import struct
 
@@ -161,9 +162,25 @@ def on_acl_pdu(self, pdu: bytes) -> None:
         self.host.on_l2cap_pdu(self, l2cap_pdu.cid, l2cap_pdu.payload)
 
 
+# -----------------------------------------------------------------------------
+@dataclasses.dataclass
+class ScoLink:
+    peer_address: Address
+    handle: int
+
+
+# -----------------------------------------------------------------------------
+@dataclasses.dataclass
+class CisLink:
+    peer_address: Address
+    handle: int
+
+
 # -----------------------------------------------------------------------------
 class Host(AbortableEventEmitter):
     connections: Dict[int, Connection]
+    cis_links: Dict[int, CisLink]
+    sco_links: Dict[int, ScoLink]
     acl_packet_queue: Optional[AclPacketQueue] = None
     le_acl_packet_queue: Optional[AclPacketQueue] = None
     hci_sink: Optional[TransportSink] = None
@@ -183,6 +200,8 @@ def __init__(
         self.hci_metadata = {}
         self.ready = False  # True when we can accept incoming packets
         self.connections = {}  # Connections, by connection handle
+        self.cis_links = {}  # CIS links, by connection handle
+        self.sco_links = {}  # SCO links, by connection handle
         self.pending_command = None
         self.pending_response = None
         self.local_version = None
@@ -696,25 +715,36 @@ def on_hci_connection_complete_event(self, event):
 
     def on_hci_disconnection_complete_event(self, event):
         # Find the connection
-        if (connection := self.connections.get(event.connection_handle)) is None:
+        handle = event.connection_handle
+        if (
+            connection := (
+                self.connections.get(handle)
+                or self.cis_links.get(handle)
+                or self.sco_links.get(handle)
+            )
+        ) is None:
             logger.warning('!!! DISCONNECTION COMPLETE: unknown handle')
             return
 
         if event.status == HCI_SUCCESS:
             logger.debug(
-                f'### DISCONNECTION: [0x{event.connection_handle:04X}] '
+                f'### DISCONNECTION: [0x{handle:04X}] '
                 f'{connection.peer_address} '
                 f'reason={event.reason}'
             )
-            del self.connections[event.connection_handle]
 
             # Notify the listeners
-            self.emit('disconnection', event.connection_handle, event.reason)
+            self.emit('disconnection', handle, event.reason)
+            (
+                self.connections.pop(handle, 0)
+                or self.cis_links.pop(handle, 0)
+                or self.sco_links.pop(handle, 0)
+            )
         else:
             logger.debug(f'### DISCONNECTION FAILED: {event.status}')
 
             # Notify the listeners
-            self.emit('disconnection_failure', event.connection_handle, event.status)
+            self.emit('disconnection_failure', handle, event.status)
 
     def on_hci_le_connection_update_complete_event(self, event):
         if (connection := self.connections.get(event.connection_handle)) is None:
@@ -775,6 +805,10 @@ def on_hci_le_cis_request_event(self, event):
     def on_hci_le_cis_established_event(self, event):
         # The remaining parameters are unused for now.
         if event.status == HCI_SUCCESS:
+            self.cis_links[event.connection_handle] = CisLink(
+                handle=event.connection_handle,
+                peer_address=Address.ANY,
+            )
             self.emit('cis_establishment', event.connection_handle)
         else:
             self.emit(
@@ -841,6 +875,11 @@ def on_hci_synchronous_connection_complete_event(self, event):
                 f'{event.bd_addr}'
             )
 
+            self.sco_links[event.connection_handle] = ScoLink(
+                peer_address=event.bd_addr,
+                handle=event.connection_handle,
+            )
+
             # Notify the client
             self.emit(
                 'sco_connection',

tests/device_test.py

@@ -467,9 +467,8 @@ def on_cis_request(
     await asyncio.gather(*peripheral_cis_futures.values())
     assert len(cis_links) == 2
 
-    # TODO: Fix Host CIS support.
-    # await cis_links[0].disconnect()
-    # await cis_links[1].disconnect()
+    await cis_links[0].disconnect()
+    await cis_links[1].disconnect()
 
 
 # -----------------------------------------------------------------------------

tests/hfp_test.py

@@ -24,11 +24,11 @@
 
 from .test_utils import TwoDevices
 from bumble import core
-from bumble import device
 from bumble import hfp
 from bumble import rfcomm
 from bumble import hci
 
+
 # -----------------------------------------------------------------------------
 # Logging
 # -----------------------------------------------------------------------------
@@ -109,7 +109,7 @@ async def test_sco_setup():
         devices[1].accept(devices[0].public_address),
     )
 
-    def on_sco_request(_connection: device.Connection, _link_type: int):
+    def on_sco_request(_connection, _link_type: int):
         connections[1].abort_on(
             'disconnection',
             devices[1].send_command(
@@ -124,26 +124,31 @@ def on_sco_request(_connection: device.Connection, _link_type: int):
 
     devices[1].on('sco_request', on_sco_request)
 
-    sco_connections = [
+    sco_connection_futures = [
         asyncio.get_running_loop().create_future(),
         asyncio.get_running_loop().create_future(),
     ]
 
-    devices[0].on(
-        'sco_connection', lambda sco_link: sco_connections[0].set_result(sco_link)
-    )
-    devices[1].on(
-        'sco_connection', lambda sco_link: sco_connections[1].set_result(sco_link)
-    )
+    for device, future in zip(devices, sco_connection_futures):
+        device.on('sco_connection', future.set_result)
 
     await devices[0].send_command(
         hci.HCI_Enhanced_Setup_Synchronous_Connection_Command(
             connection_handle=connections[0].handle,
             **hfp.ESCO_PARAMETERS[hfp.DefaultCodecParameters.ESCO_CVSD_S1].asdict(),
         )
     )
+    sco_connections = await asyncio.gather(*sco_connection_futures)
+
+    sco_disconnection_futures = [
+        asyncio.get_running_loop().create_future(),
+        asyncio.get_running_loop().create_future(),
+    ]
+    for future, sco_connection in zip(sco_disconnection_futures, sco_connections):
+        sco_connection.on('disconnection', future.set_result)
 
-    await asyncio.gather(*sco_connections)
+    await sco_connections[0].disconnect()
+    await asyncio.gather(*sco_disconnection_futures)
 
 
 # -----------------------------------------------------------------------------