Apparatus and method for filtering IP packets
AssigneeCisco Technology, Inc.
InventorsKenneth M. Rose, Venkateshwar R. Pullela, David S. Walker, Kevin C. Wong, Kaichuan He, Yu Kwong Ng
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Abstract
The method can be implemented on a processor executing software instructions stored in memory. In one embodiment of the invention, the method includes receiving an Ethernet frame, wherein the Ethernet frame comprises a Transmission Control Protocol (TCP) header, wherein the TCP header comprises a TCP header length value. When the Ethernet frame is received, the TCP header length value is compared to a predetermined value.
Claims21
A method comprising:
- receiving a Ethernet frame, wherein the Ethernet frame comprises a Transmission Control Protocol (TCP) header, wherein the TCP header comprises a TCP header length value;
- comparing the TCP header length value to a predetermined value.
An apparatus comprising:
- a circuit, the circuit comprising a first circuit;
- wherein the first circuit is configured to receive a Ethernet frame, wherein the Ethernet frame comprises a TCP header, wherein the TCP header comprises a TCP header length value;
- wherein the first circuit is configured to compare the TCP header length value to a predetermined value.
A computer readable medium for storing software instructions executable by a data processing circuit, wherein the data processing circuit performs a method in response to executing the instructions, the method comprising comparing a TCP header length value of a Ethernet frame to a predetermined value.
An apparatus comprising:
- means for receiving an Ethernet frame;
- means for comparing a TCP header length value in the Ethernet frame to a predetermined value.
Dependencies are inferred from the claim text.