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The metadata field identifiers are each represented by a bit-field. These identifiers are defined as follows:
| Metadata field identifier | Description |
|---|---|
| FWPS_METADATA_FIELD_ALE_CLASSIFY_REQUIRED | The inbound packet will also be indicated to the FWPM_LAYER_ALE_AUTH_RECV_ACCEPT_V4 and FWPM_LAYER_ALE_AUTH_RECV_ACCEPT_V6 filtering layers. Note: Supported in Windows Server 2008, Windows Vista with Service Pack 1 (SP1), and later. |
| FWPS_METADATA_FIELD_COMPARTMENT_ID | The identifier of the routing compartment in which the packet was received or is being sent. |
| FWPS_METADATA_FIELD_COMPLETION_HANDLE | The completion handle used to pend the current filtering operation. |
| FWPS_METADATA_FIELD_DESTINATION_INTERFACE_INDEX | The index of the network interface where the outgoing packet is to be sent. |
| FWPS_METADATA_FIELD_DESTINATION_PREFIX | The destination IPV4 or IPV6 address and subnet mask for the outgoing packets. Note: Supported starting with Windows 7. |
| FWPS_METADATA_FIELD_DISCARD_REASON | The reason that the data was discarded. |
| FWPS_METADATA_FIELD_ETHER_FRAME_LENGTH | This metadata field identifier is not currently supported. |
| FWPS_METADATA_FIELD_FLOW_HANDLE | The handle for the data flow. |
| FWPS_METADATA_FIELD_FORWARD_LAYER_INBOUND_PASS_THRU | The packet that traverses the FWPM_LAYER_IPFORWARD_V4 or FWPM_LAYER_IPFORWARD_V6 forward layer is locally destined (its destination matches an address that is assigned to an interface of the host). Note: Supported in Windows Server 2008, Windows Vista with SP1, and later. |
| FWPS_METADATA_FIELD_FORWARD_LAYER_OUTBOUND_PASS_THRU | The packet that traverses the FWPM_LAYER_IPFORWARD_V4 or FWPM_LAYER_IPFORWARD_V6 forward layer originated locally. Note: Supported in Windows Server 2008, Windows Vista with SP1, and later. |
| FWPS_METADATA_FIELD_FRAGMENT_DATA | The fragment data for a received packet fragment. |
| FWPS_METADATA_FIELD_ICMP_ID_AND_SEQUENCE | The Identifier and Sequence Number fields of an ICMP Echo Request or Echo Reply packet. Note: Supported starting with Windows 7. |
| FWPS_METADATA_FIELD_IP_HEADER_SIZE | The size of the IP header. |
| FWPS_METADATA_FIELD_LOCAL_REDIRECT_TARGET_PID | The Process ID that a connection was redirected to. Note: Supported starting with Windows 7. |
| FWPS_METADATA_FIELD_ORIGINAL_DESTINATION | A SOCKADDR_STORAGE structure that indicate the packet's original destination. Note: Supported starting with Windows 7. |
| FWPS_METADATA_FIELD_PACKET_DIRECTION | The direction of network traffic (inbound or outbound). |
| FWPS_METADATA_FIELD_PACKET_SYSTEM_CRITICAL | Reserved for system use. Do not use. Note: Supported in Windows Server 2008, Windows Vista with SP1, and later. |
| FWPS_METADATA_FIELD_PARENT_ENDPOINT_HANDLE | The handle of the endpoint's parent socket. Note: Supported starting with Windows 7. |
| FWPS_METADATA_FIELD_PATH_MTU | The path maximum transmission unit (path MTU) for an outgoing packet. |
| FWPS_METADATA_FIELD_PROCESS_ID | The process ID for the process that owns the endpoint. |
| FWPS_METADATA_FIELD_PROCESS_PATH | The full path to the process that owns the endpoint. |
| FWPS_METADATA_FIELD_REDIRECT_RECORD_HANDLE | The redirect records handle indicated to ALE_CONNECT_REDIRECT callout by the classify metadata. Note: Supported starting with Windows 8. |
| FWPS_METADATA_FIELD_REMOTE_SCOPE_ID | The remote scope identifier to be used in outbound transport layer injection. |
| FWPS_METADATA_FIELD_RESERVED | Reserved for system use. Do not use. |
| FWPS_METADATA_FIELD_SOURCE_INTERFACE_INDEX | The index of the network interface where the incoming packet was received. |
| FWPS_METADATA_FIELD_SUB_PROCESS_TAG | Reserved for system use. |
| FWPS_METADATA_FIELD_SYSTEM_FLAGS | System flags that are used internally by the filter engine. |
| FWPS_METADATA_FIELD_TOKEN | The token used to validate the permissions for the user. |
| FWPS_METADATA_FIELD_TRANSPORT_CONTROL_DATA | An optional socket control data object. |
| FWPS_METADATA_FIELD_TRANSPORT_ENDPOINT_HANDLE | The handle for the end of the packet to be injected into the outbound transport layer. |
| FWPS_METADATA_FIELD_TRANSPORT_HEADER_INCLUDE_HEADER | The IP header if the packet is sent from a raw socket. Note: Supported in Windows Server 2008, Windows Vista with SP1, and later. |
| FWPS_METADATA_FIELD_TRANSPORT_HEADER_SIZE | The size of the transport header. |