Zilog EZ80F91GA - Manual (Page 95)

UM024502-1012 ZGATE Logging Page
ZGATE Embedded Security Development Kit
User Manual
83
ZGATE_add_ip_prot
Function Prototype
INT16 ZGATE_add_ip_prot( INT32 IP_Prot );
Parameters
IP_Prot IP protocol number to be added to the IP Protocol number static
filtering list. The value of
IP_Prot must be between 1 and 254.
Return Value
TRUE IP_Prot was successfully added to the IP Protocol number static
filtering list.
FALSE IP_Prot is invalid, already exists in the IP Protocol static filter-
ing list, the list is full or the IP Protocol filter is disabled.
Description
When the IP Protocol filter is operating in WHITELIST (forwarding) or BLACKLIST
(blocking) Mode, it extracts the IP protocol field from inbound IP packets and compares it
to entries in the IP Protocol number static filtering list. If a match is found, the frame is
forwarded to ZTP if the IP Protocol filter operates in WHITELIST Mode and blocked
from TCP if the filter operates in BLACKLIST Mode.
This API is used to add an entry to the IP protocol static filtering list. Entries cannot be
added to the list if the IP protocol filter is disabled.