Method and apparatus for tunneling data using a single simulated stateful ...

(54) METHOD AND APPARATUS FOR

TUNNELING DATA USING A SINGLE
SIMULATED STATEFUL TCP CONNECTION

(76) Inventors: Wai Yim, Mountain View, CA (US);

Chia-Hsin Li, San Jose, CA (US)

Correspondence Address:

EPSON RESEARCH AND DEVELOPMENT
INC

INTELLECTUAL PROPERTY DEPT
150 RIVER OAKS PARKWAY, SUITE 225
SAN JOSE, CA 95134 (US)

(21) Appl. No.: 10/990,274

(22) Filed: Nov. 16, 2004

Publication Classification

(52) U.S. CI 370/395.52

Methods and systems for tunneling data associated with a packet based multimedia communication standard are provided. The method includes intercepting a library call associated with the multimedia communication standard in a modified TCP/IP stack and registering identification data associated with the library call. A modified Transmission Control Protocol/Internet Protocol (TCP/IP) header is appended over a pre-existing header of a data packet related to the identification data. The method also provides for transmitting the data packet having the TCP/IP header through a firewall. The TCP/IP header includes a TCP SEQ number and a TCP ACK number to provide a stateful connection.