Zilog EZ80F91GA - Manual (Page 87)

UM024502-1012 ZGATE Logging Page
ZGATE Embedded Security Development Kit
User Manual
75
ZGATE_add_udp_port
Function Prototype
INT16 ZGATE_add_udp_port( INT32 PortNumber );
Parameters
PortNumber UDP port number to be added to the UDP port static filtering list.
The value of
PortNumber must be between 0 and 65535.
Return Value
TRUE PortNumber was successfully added to the UDP port static fil-
tering list.
FALSE PortNumber is invalid, already exists in the UDP port static fil-
tering list, the list is full, or the UDP Port filter is disabled.
Description
When the UDP Port filter is operating in WHITELIST (forwarding) or BLACKLIST
(blocking) Mode, it extracts the destination UDP port number from inbound UDP data-
grams and compares the target port number to entries in the UDP port list. If a match is
found, the datagram is forwarded to ZTP if the 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 UP Port static filtering list. Entries cannot be added
to the UDP Port list if the UDP Port filter is disabled.