Citrix Systems Network Router 9.2 사용자 설명서
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Citrix NetScaler Policy Configuration and Reference Guide
Expressions for TCP, UDP, and VLAN Data
TCP and UDP data takes the form of a string or a number. For expression prefixes
that return string values for TCP and UDP data, you can apply any text-based
operations. For more information, see
that return string values for TCP and UDP data, you can apply any text-based
operations. For more information, see
For expression prefixes that return numeric value, such as a source port, you can
apply an arithmetic operation. For more information, see
apply an arithmetic operation. For more information, see
The following table describes prefixes that extract TCP and UDP data.
Prefixes that Extract TCP and UDP Data
Prefixes that Extract TCP and UDP Data
GET Operation
Description
CLIENT.TCP.PAYLOAD(integer)
Returns TCP payload data as a string, starting with
the first character in the payload and continuing for
the number of characters in the integer argument.
the first character in the payload and continuing for
the number of characters in the integer argument.
You can apply any text-based operation to this
prefix.
prefix.
CLIENT.TCP.SRCPORT
Returns the ID of the current packet's source port
as a number.
as a number.
CLIENT.TCP.DSTPORT
Returns the ID of the current packet's destination
port as a number.
port as a number.
CLIENT.UDP.DNS.DOMAIN
Returns the DNS domain name.
CLIENT.UDP.DNS.DOMAIN.
EQ("hostname")
Returns a Boolean TRUE if the domain name
matches the hostname argument. The comparison
is case insensitive.
matches the hostname argument. The comparison
is case insensitive.
Following is an example:
client.udp.dns.domain.eq("www.
mycompany.com")
CLIENT.UDP.DNS.IS_AAAAREC
Returns a Boolean TRUE if the record type is
AAAA. These types of records indicate an IPv6
address in forward lookups.
AAAA. These types of records indicate an IPv6
address in forward lookups.
CLIENT.UDP.DNS.IS_ANYREC
Returns a Boolean TRUE if it is of any record type.
CLIENT.UDP.DNS.IS_AREC
Returns a Boolean TRUE if the record is type A.
Type A records provide the host address.
Type A records provide the host address.
CLIENT.UDP.DNS.IS_CNAMEREC
Returns a Boolean TRUE if the record is of type
CNAME. In systems that use multiple names to
identify a resource, there is one canonical name
and a number of aliases. The CNAME provides the
canonical name.
CNAME. In systems that use multiple names to
identify a resource, there is one canonical name
and a number of aliases. The CNAME provides the
canonical name.