IP Messenger Detailed analysis

I. Overview of the SYSTEM

IP Messenger is a LAN internal chat, File Transfer tool, has many advantages, such as data communication does not need to establish a server, direct communication between two computers and data transmission, supporting file and file directory transmission, security, fast and small and convenient and so on, so many companies use it as a department, Im instant Messaging tools within the company.

IP Messenger uses the Windows SDK processing structure in the aspect of program structure, uses the TCP/UDP communication method in the communication, uses the file mapping technology in the file transfer processing, and so on. By analyzing the operation and working principle of IP Messenger, we can improve and deepen the understanding of the Windows processing process, and improve the socket programming technology, so we analyze the source code to promote the programming technology.

1, IP Messenger source code to download

In writing this article, the latest version of IP Messenger is 2.06, so you should try to choose the latest version download. IP Messenger source code download address is http://www.ipmsg.org/, in the top right corner of the site, click on the Chinese page, the website to the English interface, the website has English version as well as other language versions, of course, there are links (http:// www.azhi.net/IPMsg/), we suggest that you try to download the original English version of the source code, in order to facilitate learning.

2, the IP Messenger source code directory and file

The directory structure and files for IP Messenger source code are detailed in the list 1.1 IP Messenger source code main directories and files:

List 1.1 IP Messenger source code main directories and files

Property	Name	Describe
Directory	Src	Project file source code and install directory
File	Ipmsg. Mak	VC4 and previous versions of the engineering files used to specify how to build a project, VC6 the Mak file into a DSP file to deal with
Ipmsg. Mdp	Suffix MDP (abbreviated for Microsoft DevStudio project) is an older version of the project file, equivalent to a DSP file
Prot-eng. Txt	English version of the agreement description
PROTOCOL. Txt	Japanese version of the protocol description
Readme. Txt	The English version of the Readme
Readme-j. Txt	Japanese version of the Readme

IP Messenger's SRC directory contents are described in the list 1.2,src directory and main files.

Property	Name	Describe
Directory	INSTALL	Installer Source code Directory
File	BLOWFISH. Cpp	Encryption algorithm source file
BLOWFISH. H	Encryption Algorithm header file
BLOWFISH. H2	Encryption algorithm random number header file
Cfg. Cpp	System Configuration Source Files
Ipmsg. Cpp	Ipmsg's app source file
Ipmsg. H	Ipmsg header File
Logdlg. Cpp	Log dlg Source files
Logmng. Cpp	Log processing source files
Mainwin. Cpp	IP Messenger main Window source file
Miscdlg. Cpp	Message dlg, about DLG, and control subclasses and other source files
Msgmng. Cpp	Socket Admin Source file
PLUGIN. Cpp	Dll Plugin Load source files
Recvdlg. Cpp	Receive Message processing source files
Senddlg. Cpp	Sending a message to process a source file
Setupdlg. Cpp	IP Messenger Property Configuration source file
SHARE. Cpp	File transfer receive admin source file
TAPP. Cpp	Application class source files
Tdlg. Cpp	Dlg Class source file
Tlist. Cpp	Linked List class source file
Tregist. Cpp	Registry Action class source file
TWIN. Cpp	Window class source file
Msgstr. H	string constant header File
Tlib. H	class, structure, and so on header files