Zilog EZ80F91GA - Manual (Page 67)

UM024502-1012 ZGATE Logging Page
ZGATE Embedded Security Development Kit
User Manual
55
ZGATE_st_filter_eth
Function Prototype
INT8 ZGATE_st_filter_eth( ether * pEthFrameHdr );
Parameters
pEthFrameHdr Pointer to the Ethernet frame header.
Return Value
ZGATE_FORWARD_PACKET The frame should be processed.
ZGATE_DO_NOT_FORWARD_PACKET The frame should be dropped.
Description
ZGATE_st_filter_eth performs static filtering of Ethernet frames based on the source
Ethernet MAC address and Ethernet frame type, if these filters are enabled. This function
is the ZGATE entry point for filtering Ethernet frames. It should only ever be called from
within the Ethernet MAC driver when an Ethernet frame is received from the network. To
learn more, see the
RxFunc routine in the RZK\Conf\emac_conf.c file.
For performance reasons, this function should not be called directly from the Ethernet
driver’s interrupt service routine. It should be called from the Ethernet driver’s RZK Inter-
rupt thread. Note: