Winsock 2 SPI and LSP Layers

This section describes the Winsock 2 SPI (Service Provider Interface) architecture and LSP (Layered Service Provider) layers.

A Winsock 2 SPI (Service Provider Interface) is an interface between the Winsock 2 API, WS2_32.DLL, and a TCP/IP transport service provider or a TCP/IP-based namespace service provider.

The Winsock 2 SPI is well designed so that it can be implemented as multiple layers:

Multiple LSPs can be installed on a single system. Each of them can perform a specific communication function like filtering URL to prevent accessing certain websites. The diagram below shows the relation of Winsock SPI and LSP layers:
Winsock 2 SPI and LSP Layers

Table of Contents

 About This Book

 Introduction to Microsoft Windows

 Introduction to Windows Explorer

 Introduction to Internet Explorer

 "Paint" Program and Computer Graphics

 GIMP - GNU Image Manipulation Program

 JPEG Image File Format Quality and Size

 GIF Image File Format and Transparent Background

 "WinZip" - ZIP File Compression Tool

 "WinRAR" - RAR and ZIP File Compression Tool

 FTP Server, Client and Commands

 "FileZilla" - Free FTP Client and Server

 Web Server Log Files and Analysis Tool - "Analog"

 Spyware Adware Detection and Removal

 IE Addon Program Listing and Removal

 Vundo (VirtuMonde/VirtuMundo) - vtsts.dll Removal

 Trojan and Malware "Puper" Description and Removal

 VSToolbar (VSAdd-in.dll) - Description and Removal

 Spybot - Spyware Blocker, Detection and Removal

 Setting Up and Using Crossover Cable Network

 Home Network Gateway - DSL Modem/Wireless Router

 Windows Task Manager - The System Performance Tool

 "tasklist" Command Line Tool to List Process Information

 "msconfig" - System Configuration Tool

 Configuring and Managing System Services

 Windows Registry Key and Value Management Tools

 Startup Programs Removal for Better System Performance

Winsock - Windows Sockets API

 What is Winsock (Windows Socket) API?

 Winsock 2 API Architecture

Winsock 2 SPI and LSP Layers

 mswsock.dll - Microsoft Windows Sockets 2.0 Service Provider

 "netsh winsock show catalog" - Showing Winsock 2 LSP

 Winsock 2 LSP and Spyware Trojans

 rundlll.dll - Winsock 2 LSP Spyware Trojan

 Winsock 2 LSP Stack Registry Corruption

 LSP-Fix - LSP Stack Repair Tool

 Java on Windows

 Glossary of Terms

 Outdated Tutorials

 References

 PDF Printing Version