Proxy interception

• US 10,298,712 B2
• Filed: 02/20/2014
• Issued: 05/21/2019
• Est. Priority Date: 12/11/2013
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Eriksson, Anders E, Ihlar, Marcus, Malik, Adeel Mohammad, Ohlman, Borje, Persson, Karl-Åke, Sunde, Linus
• Primary Examiner(s): Wyllie, Christopher T
• Application Number:
  US15/103,851
• Publication Number:
  US 20160337464A1
• Time in Patent Office: 1,916 Days
• Field of Search: None
• CPC Class Codes: H04L 45/306 Route determination based on the nature of the carried application
• CPC Class Codes: H04L 61/59 using proxies for addressing
• CPC Class Codes: H04L 67/01 Protocols
• CPC Class Codes: H04L 67/562 Brokering proxy services
• CPC Class Codes: H04L 67/568 Storing data temporarily at an intermediate stage, e.g. caching
• CPC Class Codes: H04L 67/63 Routing a service request depending on the request content or context

Abstract

A client node, a proxy node, and methods therein, as well as a protocol and a computer program for enabling interception of request messages in connection-less protocols. A primary request addressed to a server node is intercepted by a proxy node creating a secondary request based on said request and forwards this secondary request towards the server node. The proxy node receives a secondary response, being a response to the secondary request, creates a primary response based on the secondary response and forwards this primary response to the node from which the primary request was received. A response can thus be sent along the same path as a corresponding request was sent.

Claims

1. A method in a proxy node for non-transparent interception, the method comprising:

receiving from a first node a primary request comprising an address of the first node as a source address, an address of a server node as a destination address, and a first token as an identifier of the primary request;

storing the primary request;

creating a secondary request based on the primary request, the secondary request comprising an address of the proxy node as a source address, the address of the server node as a destination address, and a second token as an identifier of the secondary request, wherein the secondary request is associated with the primary request;

storing the secondary request;

sending the secondary request to a second node;

receiving a secondary response from the second node, said secondary response comprising an address of the second node as a source address, the address of the proxy node as a destination address, and the second token as an identifier of the secondary response;

locating the stored secondary request based on the second token utilized with the secondary request and the secondary response;

locating the stored primary request based on association with the stored secondary request;

creating a primary response based on the primary request and the secondary response, said primary response comprising the address of the proxy node as a source address, the address of the first node as a destination address, and the first token as an identifier of the primary response; and

sending to said first node said primary response.

2. The method according to claim 1, wherein the receiving the secondary response includes receiving an object and caching the object in the proxy node as an object requested in the primary request.

3. The method according to claim 2, further comprising subsequently receiving from the first node another primary request requesting said object and when said object is cached in the proxy node, creating another primary response based on said another primary request, wherein said primary response comprising the said object, and sending said another primary response to the first node.

4. The method according to claim 1, wherein the receiving from the first node the primary request comprises intercepting the primary request as sent from the first node.

5. The method according to claim 1, wherein when receiving the secondary response, the secondary response comprising a secondary field instructing the proxy node to accept said secondary response having a source address of the second node, which is different from the server node that was the destination address of the secondary request and further creating the primary response comprising a primary field for instructing the first node to accept said primary response having a source address of the proxy node, which is different from the server node that was the destination address of the primary request.

6. The method according to claim 5, wherein the primary and secondary fields comprise the address of the server node.

7. A proxy node for a communication network, the proxy node comprising:

a processor; and

a non-transitory memory storing computer program code which when run on the processor, causes the proxy node to;

receive from a first node a primary request comprising an address of the first node as a source address, an address of a server node as a destination address, and first token as an identifier of the primary request;

store the primary request;

create a secondary request based on the primary request, the secondary request comprising an address of the proxy node as a source address, the address of the server node as a destination address, and a second token as an identifier of the secondary request, wherein the secondary request is associated with the primary request;

store the secondary request;

send the secondary request to a second node;

receive a secondary response from the second node, said secondary response comprising an address of the second node as a source address, the address of the proxy node as a destination address, and the second token as an identifier of the secondary response;

locate the stored secondary request based on the second token utilized with the secondary request and the secondary response;

locate the stored primary request based on association with the stored secondary request;

create a primary response based on the primary request and the secondary response, said primary response comprising the address of the proxy node as a source address, the address of the first node as a destination address, and the first token as an identifier of the primary response; and

send to said first node said primary response.

8. The proxy node according to claim 7, wherein the computer program code which when run on the processor, further causes the proxy node to receive the secondary response comprising an object and caching the object as an object requested in the primary request.

9. The proxy node according to claim 8, wherein the computer program code which when run in the processor, further causes the proxy node to subsequently receive from the first node another primary request requesting said object and when said object is cached in the proxy node, create another primary response based on said another primary request, wherein said primary response comprising the said object, and send said another primary response to the first node.

10. The proxy node according to claim 7, wherein the computer program code which when run on the processor, further causes the proxy node to intercept the primary request as sent from the first node.

11. The proxy node according to claim 7, wherein the computer program code which when run on the processor, further causes the proxy node to receive the secondary response comprising a secondary field instructing the proxy node to accept said secondary response having a source address of the second node, which is different from the server node that was the destination address of the secondary request and to further create the primary response comprising a primary field for instructing the first node to accept said primary response having a source address of the proxy node, which is different from the server node that was the destination address of the primary request.

12. The proxy node according to claim 11, wherein the primary and secondary fields comprise the address of the server node.

13. A proxy node for a communication network, the proxy node comprising:

a transmitter,

a receiver and

a processing circuitry that is adapted to;

receive via the receiver from a first node a primary request comprising an address of the first node as a source address, an address of a server node as a destination address, and a first token as an identifier of the primary request;

store the primary request;

create a secondary request based on the primary request, the secondary request comprising an address of the proxy node as a source address, the address of the server node as a destination address, and a second token as an identifier of the secondary request, wherein the secondary request is associated with the primary request;

store the secondary request;

transmit via the transmitter the secondary request to a second node;

receive via the receiver a secondary response from the second node, said secondary response comprising an address of the second node as a source address, the address of the proxy node as a destination address, and the second token as an identifier of the secondary response;

locate the stored secondary request based on the second token utilized with the secondary request and the secondary response;

locate the stored primary request based on association with the stored secondary request;

create a primary response based on the primary request and the secondary response, said primary response comprising the address of the proxy node as a source address, the address of the first node as a destination address, and the first token as an identifier of the primary response; and

transmit via the transmitter said primary response to said first node.

14. A method in a client node, the method comprising:

sending, to a proxy node, a primary request comprising an address of the client node as a source address, an address of a server node as a destination address, and a first token as an identifier of the primary request, wherein the primary request to cause the proxy node to store the primary request, create a secondary request based on the primary request, the secondary request comprising an address of the proxy node as a source address, the address of the server node as a destination address, and a second token as an identifier of the secondary request, in which the secondary request is associated with the primary request, and wherein the proxy node to store the secondary request and send the secondary request to a second node;

receiving from the proxy node a primary response comprising an address of the proxy node as a source address, the address of the client node as a destination address, the first token as an identifier of the primary response, and a field instructing the client node to accept the primary response having a source address which is different from the server node that was the destination address of the primary request, wherein the proxy node, in response to sending the secondary request to the second node, is to receive a secondary response from the second node, the secondary response comprising an address of the second node as a source address, the address of the proxy node as a destination address, and the second token as an identifier of the secondary response, the proxy node to further locate the stored secondary request based on the second token utilized with the secondary request and the secondary response, and to locate the stored primary request based on association with the stored secondary request, and wherein the proxy node to create the primary response based on the primary request and the secondary response; and

associating the primary request to the primary response based on the first token received with the primary response to accept the primary response as a reply to the primary request.

15. The method according to claim 14, wherein the field comprises the address of the server node.

16. A client node for a communication network, the client node comprising:

a processor; and

a non-transitory memory storing computer program code which when run on the processor, causes the client node to;

transmit, to a proxy node, a primary request comprising an address of the client node as source address, an address of a server node as a destination address, and a first token as an identifier of the primary request, wherein the primary request to cause the proxy node to store the primary request, create a secondary request based on the primary request, the secondary request comprising an address of the proxy node as a source address, the address of the server node as a destination address, and a second token as an identifier of the secondary request, in which the secondary request is associated with the primary request, and wherein the proxy node to store the secondary request and send the secondary request to a second node;

receive, from the proxy node, a primary response comprising an address of the proxy node as a source address, the address of the client node as a destination address, the first token as an identifier of the primary response, and a field instructing the client node to accept the primary response having a source address which is different from the server node that was the destination address of the primary request, wherein the proxy node, in response to sending the secondary request to the second node, to receive a secondary response from the second node, the secondary response comprising an address of the second node as a source address, the address of the proxy node as a destination address, and the second token as an identifier of the secondary response, the proxy node to further locate the stored secondary request based on the second token utilized with the secondary request and the secondary response, and to locate the stored primary request based on association with the stored secondary request, and wherein the proxy node to create the primary response based on the primary request and the secondary response; and

associate the primary request to the primary response based on the first token received with the primary response to accept the primary response as a reply to the primary request.

17. The client node according to claim 16, wherein the field comprises the address of the server node.

18. A client node for a communication network, the client node comprising:

a receiver;

a transmitter; and

a processing circuitry that is adapted to;

transmit via the transmitter, to a proxy node, a primary request comprising an address of the client node as a source address, an address of a server node as a destination address, and a first token as an identifier of the primary request, wherein the primary request to cause the proxy node to store the primary request, create a secondary request based on the primary request, the secondary request comprising an address of the proxy node as a source address, the address of the server node as a destination address, and a second token as an identifier of the secondary request, in which the secondary request is associated with the primary request, and wherein the proxy node to store the secondary request and send the secondary request to a second node;

receive via the receiver, from the proxy node, a primary response comprising an address of the proxy node as a source address, the address of the client node as a destination address, the first token as an identifier of the primary response, and a field instructing the client node to accept the primary response having a source address which is different from the server node that was the destination address of the primary request, wherein the proxy node, in response to sending the secondary request to the second node, to receive a secondary response from the second node, the secondary response comprising an address of the second node as a source address, the address of the proxy node as a destination address, and the second token as an identifier of the secondary response, the proxy node to further locate the stored secondary request based on the second token utilized with the secondary request and the secondary response, and to locate the stored primary request based on association with the stored secondary request and wherein the proxy node to create the primary response based on the primary request and the secondary response; and

associate the primary request to the primary response based on the first token received with the primary response to accept the primary response as a reply to the primary request.