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NdisCancelSendPackets function

Note   NDIS 5. x has been deprecated and is superseded by NDIS 6. x. For new NDIS driver development, see Network Drivers Starting with Windows Vista. For information about porting NDIS 5. x drivers to NDIS 6. x, see Porting NDIS 5.x Drivers to NDIS 6.0.

NdisCancelSendPackets cancels transmission of all packets marked with the specified cancellation identifier on the miniport driver identified by the binding handle.


VOID NdisCancelSendPackets(
  _In_ NDIS_HANDLE NdisBindingHandle,
  _In_ PVOID       CancelId


NdisBindingHandle [in]

Specifies the handle returned by NdisOpenAdapter that identifies the NIC or virtual adapter to which the cancellation applies.

CancelId [in]

Pointer to the cancellation identifier. This identifier specifies the packet or group of packets for which transmission is being canceled.

Return value



Transport protocols map IRPs received from higher-level software to NDIS packets, which the protocols then send to lower-level drivers for transmission. If an IRP is canceled, a transport protocol can call the NdisCancelSendPackets function to cancel the pending transmission of the corresponding NDIS packet.

The NdisCancelSendPackets function cancels packet transmissions on a single binding. To cancel packet transmissions on more than one binding, a protocol or intermediate driver must call the NdisCancelSendPackets function once for each binding.

The protocol or intermediate driver must ensure that NdisBindingHandle, which represents the driver's binding to the adapter, remains valid for the duration of the call to NdisCancelSendPackets. That is, the protocol or intermediate driver must not call the NdisCloseAdapter function to close the binding before NdisCancelSendPackets returns.

There is no guarantee that calling NdisCancelSendPackets will cancel the pending transmission of all packets with the specified cancellation ID. For example, if the next-lower driver to which the protocol or intermediate driver is bound does not provide a MiniportCancelSendPackets function, a call to NdisCancelSendPackets does nothing.

In all cases, packets submitted for transmission are returned to the originating protocol or intermediate driver through a call to the driver's ProtocolSendComplete or ProtocolCoSendComplete function. Canceled send packets are returned with a completion status of NDIS_STATUS_ABORTED. The delay between calling NdisCancelSendPackets and the return of the canceled packets can vary and therefore cannot be exactly specified.


Target platform



Not supported for NDIS 6.0 drivers in Windows Vista. Use NdisCancelSendNetBufferLists instead. Supported for NDIS 5.1 drivers in Windows Vista and Windows XP.


Ndis.h (include Ndis.h)





See also




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