Zgate_remove_tcp_port – Zilog EZ80F91GA User Manual
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ZGATE API Reference
UM024502-1012
74
ZGATE Embedded Security Development Kit
User Manual
ZGATE_remove_tcp_port
Function Prototype
INT16 ZGATE_remove_tcp_port( INT32 value );
Parameters
PortNumber
The TCP port number to be removed from the TCP port static fil-
tering list. The value of
PortNumber
must be between 0 and
65535.
Return Value
TRUE
PortNumber
was successfully removed from the TCP port static
filtering list.
FALSE
PortNumber
is invalid, does not exist in the TCP port static fil-
tering list, or the TCP Port filter is disabled.
Description
When the TCP Port filter is operating in WHITELIST (forwarding) or BLACKLIST
(blocking) Mode, it extracts the destination TCP port number from inbound TCP data seg-
ments and compares the target port number to entries in the TCP port list. If a match is
found, the packet 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 remove an entry from the TCP Port static filtering list. Entries cannot
be removed from the TCP Port list if the TCP Port filter is disabled.