File redirection method, device and computer system

A redirection and file technology, applied in the field of information security, can solve problems such as stuck, system cannot access the Internet, LSPDLL files are not found and blocked, etc.

Active Publication Date: 2013-04-03
BEIJING QIHOO TECH CO LTD
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  • Abstract
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Problems solved by technology

In addition, because LSP is injected into most processes of the system and connected in series with the network access operation of the application program, if the code is not well thought out, the computer system where the application program is located will not be able to access the Internet, the program will crash or freeze, etc.
[0004] However, there is currently no effective measure to detect and shield some problematic LSPDLL files in time

Method used

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  • File redirection method, device and computer system
  • File redirection method, device and computer system
  • File redirection method, device and computer system

Examples

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Embodiment Construction

[0027] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0028] figure 1 It is a schematic diagram of the WinSock framework. WinSock contains two scalable DLLs, transport provider DLL and namespace provider DLL. The transport provider is used for network data transmission and reception. It is layered and theoretically supports infinite layers. All layers are strung together to form a chain; namespace Provider is used for network name resolution, not hierarchical. Generally speaking, LS...

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PUM

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Abstract

The embodiment of the invention discloses a file redirection method, a file redirection device and a computer system. The method comprises the following steps that a configuration list of an application program is loaded; whether an LSP (layered service provider) DLL (dynamic link library) file to be loaded is a specific LSP DLL file or not is judged according to the configuration information of the loaded configuration list; and the operation for loading the specific LSP DLL file is replaced with the operation for loading the predefined LSP DLL file. The scheme provided by the embodiment of the invention has the advantages that through the file redirection technology, the loading of shielded LSP DLL files by the application program is avoided, a straight type LSP DLL file is loaded, and in addition, the normal network communication is ensured.

Description

technical field [0001] The invention relates to information security technology, in particular to a file redirection method, device and computer system. Background technique [0002] LSP (Layered Service Provider, network socket tool) is a unique mechanism in the communication architecture WinSock (Windows Sockets, layered service provider) of the Windows platform. Through the extensible LSP mechanism, third-party software developers can Insert DLL (Dynamic Link Library, dynamic link library) into the application program to monitor and modify TCP / IP data packets, so as to develop rich network applications, such as chat software communication encryption tools, network proxy software, online game accelerators, etc. [0003] LSP can be used to develop regular applications, and virus or Trojan authors can also use LSP to insert malicious code into the user's operating system and steal user information. In addition, because LSP is injected into most processes of the system and c...

Claims

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Application Information

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IPC IPC(8): G06F9/445
Inventor 张波谭合力
Owner BEIJING QIHOO TECH CO LTD
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