BOOL CNdisApi::GetAdapterMode ( PADAPTER_MODE pMode );
TRUE if call was successful,
Pointer to the user allocated and initialized
The following fields of ADAPTER_MODE must be initialized:
ADAPTER_MODE::hAdapterHandle – must be set to the interface handle (obtained via call to
As a result of the call, the driver fills the
ADAPTER_MODE::dwFlags with a combination of the
MSTCP_FLAG_SENT_TUNNEL– queue all packets sent from TCP/IP to network interface. Original packet is dropped.
MSTCP_FLAG_RECV_TUNNEL– queue all packets indicated by network interface to TCP/IP. Original packet is dropped.
MSTCP_FLAG_SENT_LISTEN– queue all packets sent from TCP/IP to network interface. Original packet goes ahead.
MSTCP_FLAG_RECV_LISTEN– queue all packets indicated by network interface to TCP/IP. Original packet goes ahead.
MSTCP_FLAG_FILTER_DIRECT– In promiscuous mode TCP/IP stack receives all packets in the Ethernet segment and replies with various ICMP packets, to prevent this set this flag. All packets with destination MAC different from
FF-FF-FF-FF-FF-FFand network interface current MAC will never reach TCP/IP.
By default, loopback packets are passed to original TCP/IP handlers without processing, to change this behavior use the flags below:
MSTCP_FLAG_LOOPBACK_FILTER– if not set, then loopback packets are silently passed over, otherwise these packets are passed for further processing (queued for redirecting to the application if not dropped by the
MSTCP_FLAG_LOOPBACK_BLOCK– if set, then loopback packets (with exception to broadcast/multicast) are silently dropped.
MSTCP_FLAG_LOOPBACK_BLOCK | MSTCP_FLAG_LOOPBACK_FILTER– does not allow loopback packet to pass silently and results blocking them (with exception to broadcast/multicast).
This member calls the filter driver with
IOCTL_NDISRD_GET_ADAPTER_MODE control code (see details below).