Connection-oriented session emulation

• US 5,935,212 A
• Filed: 08/07/1997
• Issued: 08/10/1999
• Est. Priority Date: 08/07/1997
• Status: Expired due to Term

• Current Assignee: Oracle America, Inc. (Oracle Corporation)
• Original Assignee: i-Planet, Inc. (Oracle Corporation)
• Inventors: Mueller, Thomas R., Kalajan, Kevin E.
• Primary Examiner(s): Ramirez, Ellis B.
• Assistant Examiner(s): TITCOMB, WILLIAM D
• Application Number:
  US08/908,626
• Time in Patent Office: 733 Days
• Field of Search: 395/200.57, 395/200.56, 395/200.32, 395/200.33, 395/200.58, 709/228, 709/203, 380/49
• US Class Current: 709/228
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 67/01 Protocols
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/162 involving adaptations of sockets based mechanisms secure socket layer H04L63/168
• CPC Class Codes: H04L 69/169 Special adaptations of TCP, UDP or IP for interworking of IP based networks with other networks protocols for interworking, protocol conversion H04L69/08

Abstract

A method for emulating a connection-oriented session across a network between a client and a server, using a stateless communication protocol, includes the steps of maintaining a persistent proxy coupling with the server, and transiently establishing a transient proxy coupling between a communication medium server and the persistent proxy coupling, the communication medium server being coupled to the network for passing communications packets back and forth with the client.

Claims

1. A method for emulating a connection-oriented session across a network between a client and a server, using a stateless communication protocol, comprising:

maintaining a persistent proxy coupling with the server, and

transiently establishing a transient proxy coupling between a communication medium server and the persistent proxy coupling, the communication medium server being coupled to the network for passing communications packets back and forth with the client.

2. The method of claim 1 wherein the connection-oriented session is a TCP session.

3. The method of claim 1 wherein the stateless communication protocol comprises HTTP.

4. The method of claim 1 wherein the network comprises a TCP/IP-compatible network.

5. The method of claim 1 wherein the communication medium server comprises an HTTP server.

6. The method of claim 1 wherein a connection-oriented session request issued by the client is translated into a stateless communication protocol-compliant message.

7. The method of claim 6 wherein the stateless communication protocol-compliant message is translated back into the connection-oriented session request and provided to the server.

8. The method of claim 7 wherein the transient proxy coupling translates the stateless communication protocol-compliant message back into the connection-oriented session request.

9. The method of claim 1 wherein the persistent proxy coupling remains active during the connection-oriented session.

10. The method of claim 1 wherein the transient proxy coupling closes substantially coincident with the transmission of data from the server to the client.

11. The method of claim 10 wherein the persistent proxy coupling signals the transient proxy coupling to close.

12. The method of claim 11 wherein the persistent proxy coupling signals the transient proxy coupling to close if the persistent proxy coupling has not received data from the server for a selected length of time.

13. The method of claim 1 wherein the transient proxy coupling is initiated by the communication medium server upon receiving a message from the client.

14. The method of claim 13 wherein the persistent proxy coupling, if not already active, is initiated by the transient proxy coupling.

15. The method of claim 1 wherein the transient proxy coupling and the persistent proxy coupling are closed at the end of the connection-oriented session.

16. The method of claim 1 wherein the client and the communication medium server use encryption techniques for exchanging communication packets.

17. The method of claim 1 wherein the communication medium server comprises an HTTP server and the encryption techniques comprise SSL.

18. The method of claim 1 wherein the client and the communication medium server use compression techniques for exchanging communication packets.

19. Apparatus for emulating a connection-oriented session across a network between a client and a server, using a stateless communication protocol, the connection-oriented session being mediated through a communication medium server, the communication medium server being coupled to the network for passing communications packets back and forth with the client, comprising:

a persistent proxy coupled to the server, and

a transient proxy coupled between the communication medium server and the persistent proxy.

20. The apparatus of claim 19 wherein the connection-oriented session is a TCP session.

21. The apparatus of claim 19 wherein the stateless communication protocol comprises HTTP.

22. The apparatus of claim 19 wherein the network comprises a TCP/IP-compatible network.

23. The apparatus of claim 19 wherein the communication medium server comprises an HTTP server.

24. The apparatus of claim 19 wherein the persistent proxy remains active during the connection-oriented session.

25. The apparatus of claim 19 wherein the transient proxy closes substantially coincident with the transmission of data from the server to the client.

26. The apparatus of claim 25 wherein the persistent proxy signals the transient proxy to close.

27. The apparatus of claim 26 wherein the persistent proxy signals the transient proxy to close if the persistent proxy has not received data from the server for a selected length of time.

28. The apparatus of claim 19 wherein the transient proxy is initiated by the communication medium server upon receiving a message from the client.

29. The apparatus of claim 28 wherein the persistent proxy, if not already active, is initiated by the transient proxy.

30. The apparatus of claim 19 wherein the transient proxy and the persistent proxy are closed at the end of the connection-oriented session.

31. The apparatus of claim 19 wherein the client and the communication medium server use encryption techniques for exchanging communication packets.

32. The apparatus of claim 19 wherein the communication medium server comprises an HTTP server and the encryption techniques comprise SSL.

33. The apparatus of claim 19 wherein the client and the communication medium server use compression techniques for exchanging communication packets.

34. Apparatus for emulating a TCP session between a TCP client and a TCP server over a TCP/IP-compatible network connection through an HTTP server, comprising:

a transient proxy TCP socket application coupled to the HTTP server, the transient proxy TCP socket application closing substantially coincident with the transmission of data from the TCP server to the TCP client; and

a persistent proxy TCP socket application coupled to the transient proxy TCP socket application, the persistent proxy TCP socket application coupled to the TCP server, the persistent proxy TCP socket application remaining active during the emulated TCP session with the TCP server.

35. The apparatus of claim 34 wherein the TCP client and HTTP server use encryption techniques for exchanging messages.

36. The apparatus of claim 34 wherein the encryption techniques comprise SSL.

37. A storage device tangibly storing a control program, the control program, when coupled to a control device, operating the control device to emulate a connection-oriented session between a client and a server, using a stateless communication protocol over a network, the connection-oriented session being mediated through a communication medium server for passing communication packets back and forth with the client, the control program being configured to operate the control device to perform the function of:

maintaining a persistent proxy coupling with the server; and

transiently establishing a transient proxy coupling between the communication medium server and the persistent proxy coupling.

38. The storage device of claim 37 wherein the connection-oriented session is a TCP session.

39. The storage device of claim 37 wherein the stateless communication protocol comprises HTTP.

40. The storage device of claim 37 wherein the network comprises a TCP/IP-compatible network.

41. The storage device of claim 37 wherein the communication medium server comprises an HTTP server.

42. The storage device of claim 37 wherein a connection-oriented session request issued by the client is translated into a stateless communication protocol-compliant message.

43. The storage device of claim 42 wherein the stateless communication protocol-compliant message is translated back into the connection-oriented session request and provided to the server.

44. The storage device of claim 43 wherein the transient proxy coupling translates the stateless communication protocol-compliant message back into the connection-oriented session request.

45. The storage device of claim 37 wherein the persistent proxy coupling remains active during the connection-oriented session with the server.

46. The storage device of claim 37 wherein the transient proxy coupling closes substantially coincident with the transmission of data from the server to the client.

47. The storage device of claim 46 wherein the persistent proxy coupling signals the transient proxy coupling to close.

48. The storage device of claim 47 wherein the persistent proxy coupling signals the transient proxy coupling to close if the persistent proxy coupling has not received data from the server for a selected length of time.

49. The storage device of claim 37 wherein the transient proxy coupling is initiated by the communication medium server upon receiving a message from the client.

50. The storage device of claim 49 wherein the persistent proxy coupling, if not already active, is initiated by the transient proxy coupling.

51. The storage device of claim 37 wherein the transient proxy coupling and the persistent proxy coupling are closed at the end of the connection-oriented session.

52. The storage device of claim 37 wherein the client and communication medium server use encryption techniques for exchanging communication packets.

53. The storage device of claim 37 wherein the communication medium server comprises an HTTP server and the encryption techniques comprise SSL.

54. The storage device of claim 37 wherein the client and communication medium server use compression techniques for exchanging communication packets.