Method and apparatus for transferring remote session data

• US 9,578,113 B2
• Filed: 08/15/2014
• Issued: 02/21/2017
• Est. Priority Date: 04/15/2009
• Status: Active Grant

• Current Assignee: Dell Marketing Corporation (Dell Technologies Inc.)
• Original Assignee: Wyse Technology L.L.C. (Dell Technologies Inc.)
• Inventors: Sullad, Roshan, Le, Bach H., Schwebke, Curtis J., Kominac, Stevan
• Primary Examiner(s): Lazaro, David
• Assistant Examiner(s): HENRY, MARIEGEORGES A
• Application Number:
  US14/460,721
• Publication Number:
  US 20140359003A1
• Time in Patent Office: 921 Days
• Field of Search: 709/203, 709/227, 709/228
• US Class Current: 1/1
• CPC Class Codes: G06F 3/04812 Interaction techniques based on cursor appearance or behaviour, e.g. being affected by the presence of displayed objects
• CPC Class Codes: G06F 9/452 Remote windowing, e.g. X-Window System, desktop virtualisation protocols for virtual reality H04L67/131
• CPC Class Codes: H04L 63/0407 wherein the identity of one or more communicating identities is hidden cryptographic mechanisms or cryptographic arrangements for anonymous credentials or for identity based cryptographic systems H04L9/00
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04L 63/0853 using an additional device, e.g. smartcard, SIM or a different communication terminal cryptographic mechanisms or cryptographic arrangements for entity authentication involving additional secure or trusted devices H04L9/3234
• CPC Class Codes: H04L 63/126 the source of the received data
• CPC Class Codes: H04L 67/10 in which an application is distributed across nodes in the network software deployment G06F8/60; multiprogramming arrangements G06F9/46
• CPC Class Codes: H04L 67/148 Migration or transfer of sessions

Abstract

Examples of systems and methods are provided for communication and for forwarding display data and cursor type related to a remote session between a client device and a remote server. The system may facilitate establishing the remote session with the remote server. After the client device is connected to a remote session, it is determined if the style of the client device'"'"'s cursor should be changed. The RDP client of the remote server creates the changed cursor based on bitmap details. The change cursor may be a 1-bit or 32-bit cursor. When the remote session is disconnected, the default cursor for the client device is re-instated at the client device.

Claims

1. A client device configured to forward display data related to a remote session between the client device and a remote server device, the remote server device comprising:

a memory;

a processor communicatively coupled to the memory; and

instructions encoded in the memory, the instructions, when executed by the processor, operable to perform operations comprising;

loading a remote desktop protocol (RDP) client;

communicating with the RDP client via one or more callback functions;

communicating with an RDP server via the RDP client;

receiving current position coordinates of a remote cursor from the client device;

communicating the current position coordinates to the RDP server;

polling for changes to a style of a cursor;

notifying the RDP client that a cursor style has changed;

retrieving bitmap data and hotspot values for the changed cursor style by the RDP client from the RDP server;

storing a handle associated with the cursor style;

communicating the bitmap and hotspot values for the changed cursor style to the client device; and

restoring a default style for the cursor.

2. A non-transitory machine-readable medium encoded with instructions for execution at a client device side for communication and for forwarding display data related to a remote session between a client device and a remote server device, the instructions comprising code for:

facilitating establishing the remote session between the client device and the remote server device;

communicating coordinates of a remote cursor to the remote server device;

polling for changes to a style of the remote cursor;

storing a handle associated with the remote cursor;

changing the style of the remote cursor based, at least in part, on cursor data received from the remote server device; and

restoring a default style of the remote cursor.

3. The non-transitory machine-readable medium of claim 2, wherein the cursor data is received as a variable in a cookie.

4. The non-transitory machine-readable medium of claim 2, the instructions further comprising code for:

restoring a default cursor when the remote session is terminated.

5. The non-transitory machine-readable medium of claim 2, wherein when the remotes session is terminated, all saved cursor files are deleted from the memory and any associated resources are released.

6. A non-transitory machine-readable medium encoded with instructions for execution at a remote server device side for communication and for forwarding display data related to a remote session between a client device and a remote server device, the instructions comprising code for:

facilitating establishing the remote session between the client device and the remote server device;

polling for changes to a style of a remote cursor;

receiving current coordinates for the remote cursor from the client device;

receiving bitmap data for a changed cursor, wherein the changed cursor bitmap data is created by a remote desktop protocol (RDP) client of the remote server device using bitmap data provided by an RDP server associated with the RDP client;

storing the changed cursor handle for the changed cursor;

creating the changed cursor by the RDP client;

storing the changed cursor;

setting an internal cursor flag, wherein the internal cursor flag indicates a change in style for displaying the remote cursor;

determining if a changed cursor handle for the changed cursor is different than a remote cursor handle for the remote cursor;

setting a cursor change flag if it is determined that the changed cursor handle is different than the remote cursor handle;

sending in response to a request from the client device a cursor file bitmap data and hot spot coordinates for the changed cursor if the cursor change flag is set;

restoring a default style for the remote cursor.

7. The non-transitory machine-readable medium of claim 6, wherein the RDP server determines the type of changed cursor to create.

8. The non-transitory machine-readable medium of claim 7, wherein the type is one of a 1-bit or a 32-bit cursor.

9. The non-transitory machine-readable medium of claim 6, wherein the RDP client receives bitmap details related to the changed cursor for creating the changed cursor.

10. The non-transitory machine-readable medium of claim 9, wherein the type is one of a 1-bit or a 32-bit cursor.

11. The non-transitory machine-readable medium of claim 6, wherein mask data is used to create the changed cursor.

12. The non-transitory machine-readable medium of claim 6, wherein mask data is constructed and then used to create the changed cursor.

13. The non-transitory machine-readable medium of claim 6, wherein the changed cursor handle is unique.

14. The non-transitory machine-readable medium of claim 6, wherein the changed cursor is saved to a specific location.

15. The non-transitory machine-readable medium of claim 6, wherein resources allocated for creation of the changed cursor are released.

16. The non-transitory machine-readable medium of claim 6, wherein the changed cursor is saved with its handle value as its file name.

17. The non-transitory machine-readable medium of claim 6, wherein the changed cursor is saved in a .cur file format.

18. The non-transitory machine-readable medium of claim 6, wherein a main response thread of the remote server device polls for changes to the cursor change flag.

19. The non-transitory machine-readable medium of claim 6, wherein the cursor file bitmap data and hot spot coordinates for the changed cursor are sent via one or more variables in a cookie.

20. The non-transitory machine-readable medium of claim 6, the instructions further comprising code for:

determining if the changed cursor has previously been created based, at least in part, on the style of the changed cursor, wherein if the changed cursor has previously been created then re-using a previously stored cursor that has the style of the changed cursor.