Add mac address as connection for matter device

homeassistant/components/matter/adapter.py

@@ -4,7 +4,9 @@
 
 from typing import TYPE_CHECKING, cast
 
+from chip.clusters.Objects import GeneralDiagnostics
 from matter_server.client.models.device_types import BridgedDevice
+from matter_server.common.helpers.util import convert_mac_address
 from matter_server.common.models import EventType, ServerInfoMessage
 
 from homeassistant.config_entries import ConfigEntry
@@ -22,6 +24,30 @@
     from matter_server.client.models.node import MatterEndpoint, MatterNode
 
 
+def get_connections_for_endpoint(endpoint: MatterEndpoint) -> set[tuple[str, str]]:
+    """Return a set of connections for a MatterEndpoint."""
+    network_interfaces: list[GeneralDiagnostics.Structs.NetworkInterface] = (
+        endpoint.get_attribute_value(
+            None, GeneralDiagnostics.Attributes.NetworkInterfaces
+        )
+        or []
+    )
+
+    hardware_addresses: set[str] = {
+        convert_mac_address(network_interface.hardwareAddress)
+        for network_interface in network_interfaces
+        if network_interface.hardwareAddress
+    }
+
+    return {
+        (dr.CONNECTION_NETWORK_MAC, address)
+        if len(address) == 17
+        else (dr.CONNECTION_ZIGBEE, address)
+        for address in hardware_addresses
+        if len(address) in (17, 23)  # EUI-48 -> 17, EUI-64 -> 23
+    }
+
+
 def get_clean_name(name: str | None) -> str | None:
     """Strip spaces and null char from the name."""
     if name is None:
@@ -185,6 +211,9 @@ def _create_device_registry(
             endpoint,
         )
         identifiers = {(DOMAIN, f"{ID_TYPE_DEVICE_ID}_{node_device_id}")}
+
+        connections = get_connections_for_endpoint(endpoint)
+
         serial_number: str | None = None
         # if available, we also add the serialnumber as identifier
         if (
@@ -203,6 +232,7 @@ def _create_device_registry(
             name=name,
             config_entry_id=self.config_entry.entry_id,
             identifiers=identifiers,
+            connections=connections,
             hw_version=basic_info.hardwareVersionString,
             sw_version=basic_info.softwareVersionString,
             manufacturer=basic_info.vendorName or endpoint.node.device_info.vendorName,

tests/components/matter/test_adapter.py

@@ -187,6 +187,60 @@ async def test_device_registry_single_node_composed_device(
     assert len(dev_reg.devices) == 1
 
 
+async def test_device_registry_single_node_with_connection(
+    hass: HomeAssistant,
+    device_registry: dr.DeviceRegistry,
+    matter_client: MagicMock,
+) -> None:
+    """Test that a device with mac address adds a connection to the HA device entry."""
+    await setup_integration_with_node_fixture(
+        hass,
+        "thermostat",
+        matter_client,
+    )
+
+    assert device_registry.async_get_device(connections={("mac", "DC:54:75:5F:BA:AC")})
+
+
+async def test_device_registry_single_node_without_mac_address_has_no_mac_connection(
+    hass: HomeAssistant,
+    device_registry: dr.DeviceRegistry,
+    matter_client: MagicMock,
+) -> None:
+    """Test that a device without mac address doesn't have a `mac` connection in the HA device entry."""
+    await setup_integration_with_node_fixture(
+        hass,
+        "temperature-sensor",
+        matter_client,
+    )
+
+    entry = device_registry.async_get_device(
+        identifiers={
+            (DOMAIN, "deviceid_00000000000004D2-0000000000000001-MatterNodeDevice")
+        }
+    )
+
+    for connection_type, _ in entry.connections:
+        assert connection_type != dr.CONNECTION_NETWORK_MAC
+
+
+async def test_device_registry_node_with_EUI64_address(
+    hass: HomeAssistant,
+    device_registry: dr.DeviceRegistry,
+    matter_client: MagicMock,
+) -> None:
+    """Test that a device with a mac address has a `zigbee` connection in the HA device entry."""
+    await setup_integration_with_node_fixture(
+        hass,
+        "eve-energy-plug",
+        matter_client,
+    )
+
+    assert device_registry.async_get_device(
+        connections={("zigbee", "ca:6b:4a:23:f6:f8:bb:ee")}
+    )
+
+
 async def test_multi_endpoint_name(
     hass: HomeAssistant,
     matter_client: MagicMock,