IP_DISCARD_REASON - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// fwpsk.h

typedef enum {
  IpDiscardBadSourceAddress,
  IpDiscardNotLocallyDestined,
  IpDiscardProtocolUnreachable,
  IpDiscardPortUnreachable,
  IpDiscardBadLength,
  IpDiscardMalformedHeader,
  IpDiscardNoRoute,
  IpDiscardBeyondScope,
  IpDiscardInspectionDrop,
  IpDiscardTooManyDecapsulations,
  IpDiscardAdministrativelyProhibited,
  IpDiscardBadChecksum,
  IpDiscardFirstFragmentIncomplete,
  IpDiscardHeaderNotContiguous,
  IpDiscardHeaderNotAligned,
  IpDiscardReceivePathMax,
  IpDiscardHopLimitExceeded,
  IpDiscardAddressUnreachable,
  IpDiscardRscPacket,
  IpDiscardSourceViolation,
  IpDiscardForwardPathMax,
  IpDiscardArbitrationUnhandled,
  IpDiscardInspectionAbsorb,
  IpDiscardDontFragmentMtuExceeded,
  IpDiscardBufferLengthExceeded,
  IpDiscardAddressResolutionTimeout,
  IpDiscardAddressResolutionFailure,
  IpDiscardIpsecFailure,
  IpDiscardExtensionHeadersFailure,
  IpDiscardAllocationFailure,
  IpDiscardIpsnpiClientDrop,
  IpDiscardUnsupportedOffload,
  IpDiscardRoutingFailure,
  IpDiscardAncillaryDataFailure,
  IpDiscardRawDataFailure,
  IpDiscardSessionStateFailure,
  IpDiscardIpsnpiAllocationFailure,
  IpDiscardIpsnpiModifiedButNotForwarded,
  IpDiscardIpsnpiNoNextHop,
  IpDiscardIpsnpiNoCompartment,
  IpDiscardIpsnpiNoInterface,
  IpDiscardIpsnpiNoSubInterface,
  IpDiscardIpsnpiInterfaceDisabled,
  IpDiscardIpsnpiSegmentationFailed,
  IpDiscardIpsnpiNoEthernetHeader,
  IpDiscardIpsnpiUnexpectedFragment,
  IpDiscardIpsnpiUnsupportedInterfaceType,
  IpDiscardIpsnpiInvalidLsoInfo,
  IpDiscardIpsnpiInvalidUsoInfo,
  IpDiscardInternalError,
  IpDiscardAdministrativelyConfigured,
  IpDiscardBadOption,
  IpDiscardLoopbackDisallowed,
  IpDiscardSmallerScope,
  IpDiscardQueueFull,
  IpDiscardInterfaceDisabled,
  IpDiscardNlClientDiscard,
  IpDiscardIpsnpiUroSegmentSizeExceedsMtu,
  IpDiscardSwUsoFailure,
  IpDiscardMax
} IP_DISCARD_REASON, *PIP_DISCARD_REASON;
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Windows Driver Kit DDI reference (ne-fwpsk-ip_discard_reason)

Description

The IP_DISCARD_REASON enum defines the possible reasons that data is discarded by one of the network layers.

Constants

IpDiscardBadSourceAddress

The outgoing packet's source address is a multicast address, a broadcast address, or an IPv6 address that contains an embedded IPv4 loopback or unspecified address.

IpDiscardNotLocallyDestined

The received packet's destination address doesn't exist on the system, and no appropriate forwarding interface exists.

IpDiscardProtocolUnreachable

There's either no transport protocol handler for the received packet or the transport protocol handler refused to process the packet.

IpDiscardPortUnreachable

There's no application that is receiving packets on the received packet's destination port.

IpDiscardBadLength

A length field specified within the received packet is inconsistent with the packet's length.

IpDiscardMalformedHeader

The received packet contains a recognized extension header or option whose contents are invalid.

IpDiscardNoRoute

The received packet can't be forwarded to its destination address because the system's routing table doesn't contain a route to that destination.

IpDiscardBeyondScope

The received packet can't be forwarded because the packet's incoming and outgoing network interfaces have different zone indexes for the packet's zone level.

IpDiscardInspectionDrop

The packet was dropped during inspection due to failing security checks or protocol compliance issues.

IpDiscardTooManyDecapsulations

The received packet cannot be forwarded to its destination address because there are too many decapsulations.

IpDiscardAdministrativelyProhibited

The packet was discarded due to administrative policies prohibiting its transmission or receipt.

IpDiscardBadChecksum

The packet was discarded because its checksum was incorrect, indicating potential data corruption.

IpDiscardFirstFragmentIncomplete

The first fragment of the packet was incomplete, leading to the discard of the entire packet.

IpDiscardHeaderNotContiguous

The packet's header wasn't contiguous in memory, causing it to be discarded.

IpDiscardHeaderNotAligned

The packet header wasn't properly aligned, leading to its discard due to formatting issues.

IpDiscardReceivePathMax

The packet was discarded as it exceeded the maximum length allowed on the receive path.

IpDiscardHopLimitExceeded

The received packet's hop limit or time-to-live limit has been exceeded.

IpDiscardAddressUnreachable

The outgoing packet can't be sent to the packet's destination address either because the destination doesn't exist or packets aren't allowed to be sent to that destination.

IpDiscardRscPacket

The outgoing packet can't be sent because it is a receive-side coalesced (RSC) packet.

IpDiscardSourceViolation

The packet was discarded because it violated source address validation checks.

IpDiscardForwardPathMax

The packet exceeded the maximum path length for forwarding and was discarded.

IpDiscardArbitrationUnhandled

The packet was discarded because it required arbitration that wasn't handled.

IpDiscardInspectionAbsorb

The outgoing packet cannot be sent because WFP took ownership of the packet.

IpDiscardDontFragmentMtuExceeded

The packet was discarded because it exceeded the MTU size and had the Don't Fragment bit set.

IpDiscardBufferLengthExceeded

The packet was discarded because it exceeded the buffer length limitations.

IpDiscardAddressResolutionTimeout

The packet was discarded due to a timeout in address resolution.

IpDiscardAddressResolutionFailure

The packet was discarded because address resolution failed.

IpDiscardIpsecFailure

The packet was discarded due to an IPsec processing failure.

IpDiscardExtensionHeadersFailure

The packet was discarded because of a failure related to processing IPv6 extension headers.

IpDiscardAllocationFailure

The packet was discarded due to a failure in allocating necessary resources.

IpDiscardIpsnpiClientDrop

The packet was discarded by an IPSNPI client due to unspecified reasons.

IpDiscardUnsupportedOffload

The packet was discarded because it required an unsupported offload operation.

IpDiscardRoutingFailure

The packet was discarded due to a failure in routing.

IpDiscardAncillaryDataFailure

The packet was discarded because of a failure related to ancillary data processing.

IpDiscardRawDataFailure

The packet was discarded due to a failure in processing raw data.

IpDiscardSessionStateFailure

The packet was discarded because of a failure related to session state management.

IpDiscardIpsnpiAllocationFailure

The packet was discarded due to an allocation failure within the IPSNPI subsystem.

IpDiscardIpsnpiModifiedButNotForwarded

The packet was modified by IPSNPI but not forwarded, leading to its discard.

IpDiscardIpsnpiNoNextHop

The packet was discarded because no next hop could be determined in the IPSNPI subsystem.

IpDiscardIpsnpiNoCompartment

The packet was discarded due to a missing compartment in the IPSNPI subsystem.

IpDiscardIpsnpiNoInterface

The packet was discarded because no interface was found in the IPSNPI subsystem.

IpDiscardIpsnpiNoSubInterface

The packet was discarded due to the absence of a sub-interface in the IPSNPI subsystem.

IpDiscardIpsnpiInterfaceDisabled

The packet was discarded because the interface in the IPSNPI subsystem was disabled.

IpDiscardIpsnpiSegmentationFailed

The packet was discarded due to a failure in segmentation within the IPSNPI subsystem.

IpDiscardIpsnpiNoEthernetHeader

The packet was discarded because it lacked an Ethernet header in the IPSNPI subsystem.

IpDiscardIpsnpiUnexpectedFragment

The packet was discarded because it was an unexpected fragment in the IPSNPI subsystem.

IpDiscardIpsnpiUnsupportedInterfaceType

The packet was discarded due to an unsupported interface type in the IPSNPI subsystem.

IpDiscardIpsnpiInvalidLsoInfo

The packet was discarded because of invalid Large Send Offload (LSO) information in the IPSNPI subsystem.

IpDiscardIpsnpiInvalidUsoInfo

The packet was discarded due to invalid UDP Segmentation Offload (USO) information in the IPSNPI subsystem.

IpDiscardInternalError

The packet was discarded due to an internal error within the system.

IpDiscardAdministrativelyConfigured

The packet was discarded due to an administrative configuration that prevented its processing.

IpDiscardBadOption

The packet was discarded because it contained a bad option or an option that couldn't be processed.

IpDiscardLoopbackDisallowed

The packet was discarded because loopback was disallowed for its type or destination.

IpDiscardSmallerScope

The packet was discarded because its scope was smaller than required for successful delivery.

IpDiscardQueueFull

The packet was discarded because the processing queue was full.

IpDiscardInterfaceDisabled

The packet was discarded because the interface it arrived on was disabled.

IpDiscardNlClientDiscard

The packet was discarded by a Netlink client due to unspecified reasons.

IpDiscardIpsnpiUroSegmentSizeExceedsMtu

The packet was discarded because the segment size for UDP RSC Offload (URO) exceeded the MTU in the IPSNPI subsystem.

IpDiscardSwUsoFailure

The packet was discarded due to a UDP Segmentation Offload (USO) failure.

IpDiscardMax

The maximum value for enumeration.

Remarks

See also

View the official Windows Driver Kit DDI reference

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