Zilog EZ80F91GA Manuel d'utilisateur télécharger pdf (Page 86)

ZGATE API Reference UM024502-1012

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.

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Zilog EZ80F91GA Manuel d'utilisateur Page 86