INTERCEPTION METHOD AND SYSTEM FOR COMPENSATING DISADVANTAGEOUS CHARACTERISTICS OF A COMMUNICATION PROTOCOL

• US 20070136463A1
• Filed: 10/11/2006
• Published: 06/14/2007
• Est. Priority Date: 07/07/2000
• Status: Active Grant

• Current Assignee: Kyndryl Incorporated
• Original Assignee: Dirk Sabiwalsky, Ludwig Guenther, Tzvetan Petrov
• Inventors: Sabiwalsky, Dirk, Petrov, Tzvetan, Guenther, Ludwig
• Granted Patent: US 7,587,490 B2
• Time in Patent Office: Days
• US Class Current: 709/224
• CPC Class Codes: H04L 67/04 specially adapted for terminals or networks with limited capabilities; specially adapted for terminal portability
• CPC Class Codes: H04L 67/2876 Pairs of inter-processing entities at each side of the network, e.g. split proxies
• CPC Class Codes: H04L 67/56 Provisioning of proxy services store-and-forward switching systems in data switching networks H04L12/54
• CPC Class Codes: H04L 67/564 Enhancement of application control based on intercepted application data
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion
• 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 69/165 Combined use of TCP and UDP protocols; selection criteria therefor
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]

Abstract

A data communication method that compensates for a disadvantageous characteristics of a first protocol. A client application and a server application employ a second protocol (i.e., a TCP/IP protocol) that is mapped onto the first protocol. A data communication request is received by a SOCKS client in accordance with the second protocol. The request, after being redirected client to a client interceptor by the SOCKS using a SOCKS protocol, is intercepted by the socks CLIENT. The client interceptor maps the request onto the first protocol, after which the client interceptor sends the mapped request to a server interceptor. The server interceptor compensates a disadvantageous characteristic of the first protocol to ascertain that a connection or transmission capacity condition exists and then to eliminate the condition. The server interceptor then maps the request onto the second protocol, after which the server interceptor transmits the mapped request to the server application.

Claims

1. A data communication method that compensates for disadvantageous characteristics of a first protocol that is used to communicate data between a client application and a server application, wherein the client application and the server application employ a second protocol that is mapped onto the first protocol, said method comprising:

receiving a data communication request directed by the client application to the server application, said request being received in accordance with the second protocol by a SOCKS client, said second protocol being a TCP/IP protocol;

redirecting the request in accordance with the second protocol to a client interceptor, said redirecting being performed by the SOCKS client using a SOCKS protocol;

intercepting the redirected request in accordance with the second protocol from the SOCKS client, said intercepting being performed by the client interceptor using the SOCKS protocol, said client interceptor acting on behalf of the server application;

mapping, by the client interceptor, the request in accordance with the second protocol onto the first protocol;

sending, by the client interceptor, the request in accordance with the first protocol to a server interceptor;

compensating, by the server interceptor, a disadvantageous characteristic of the first protocol, said compensating comprising ascertaining that a condition exists and eliminating the condition in response to said ascertaining, said condition being a connection condition or a transmission capacity condition;

mapping, by the server interceptor, the request in accordance with the first protocol onto the second protocol; and

transmitting, by the server interceptor, the request in accordance with the second protocol to the server application.

2. The method of claim 1, wherein the method further comprises after said intercepting the communication request and before said sending the request to the server interceptor:

adding, by the client interceptor, a client connection identifier to the request.

3. The method of claim 1, wherein the client application resides on a computing device, wherein the computing device comprises a communication platform client that includes a session layer, a reliability layer, and a network layer, and wherein in response to the network layer attempting to send data with no physical connection in place for sending the data said method comprises:

repeatedly attempting to set up a new physical connection until either the new physical connection is set up or until a logical connection is closed by the session layer in response to the reliability layer having detected a session timeout.

4. The method of claim 1, wherein said ascertaining comprises determining loss of a connection, and wherein said eliminating comprises re-establishing the connection.

5. The method of claim 1, wherein said ascertaining comprises detecting that a connection is idle, and wherein said eliminating comprises dropping the connection and re-establishing the connection when a new communication request is intercepted.

6. The method of claim 1, wherein said ascertaining comprises determining that transmission capacity is insufficient to process the data communication request within a predetermined interval of time, and wherein said eliminating comprises establishing a parallel connection to increase transmission capacity.

7. The method of claim 1, wherein the second protocol is connection oriented, and wherein the client interceptor and the server interceptor intercept a plurality of connections between the client application and the client interceptor using the second protocol, and between the server interceptor and the server application using the second protocol.

8. The method of claim 7, wherein the plurality of connections using the second protocol are multiplexed onto a single connection of the first protocol.

9. The method of claim 1, wherein the first protocol is a wireless communication protocol.

10. The method of claim 1, wherein the method further comprises opening, by the client interceptor, a connection to the server interceptor using the first protocol following said intercepting the redirected request.

11. The method of claim 1, wherein the method further comprises:

opening, by the client interceptor, a connection to the server interceptor using the first protocol following the act of intercepting the second-protocol data communication request; and

receiving, by the client interceptor, an identification of the server application; and

forwarding the identification to an address-resolution server for first-protocol address resolution.

12. The method of claim 1, wherein said compensating further comprises closing idle connections to reduce costs.

13. A computer program product, comprising a computer usable medium having a computer readable program code embodied therein, said computer readable program code containing instructions that when executed by a computer system implement the method of claim 1.

14. A computer system comprising a computer readable memory unit, said memory unit containing instructions that when executed by the processor implement the method of claim 1.