Zilog EZ80F91GA - Manual (Page 84)

ZGATE API Reference UM024502-1012
72
ZGATE Embedded Security Development Kit
User Manual
ZGATE_set_th_LW
Function Prototype
INT16 ZGATE_set_th_LW( INT32 LW_Thresh );
Parameters
LW_Thresh The new threshold filtering low-water (lower) threshold. This
low-water threshold must be greater than 20 and must be at no
more than half the high-water threshold.
Return Value
TRUE The threshold filtering low-water threshold was successfully
changed.
FALSE The specified low-water threshold value is invalid.
Description
After ZGATE detects that a node on the local network is sending packets to ZTP at a rate
approaching the high-water threshold, subsequent packets from that source IP address will
be blocked until the node’s transmission rate falls below the low-water threshold. This
API is used to alter the low-water threshold.