Zilog EZ80F91GA - Manual (Page 96)

ZGATE API Reference UM024502-1012
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ZGATE Embedded Security Development Kit
User Manual
ZGATE_remove_ip_prot
Function Prototype
INT16 ZGATE_remove_ip_prot( INT32 IP_Prot );
Parameters
IP_Prot IP protocol number to be removed from 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, does not exist in the IP Protocol static filter-
ing list 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 remove an entry from the IP protocol static filtering list. Entries cannot
be removed from the list if the IP protocol filter is disabled.