winsock dll

1 Introduction The Windows Sockets Specification defines a set of network programming interfaces in Microsoft Windows based on the socket interface popular in U. C. Berkeley University bsd unix. It not only contains the familiar Berkeley socket library functions, but also contains a set of extended library functions for Windows Program Developers can make full use of the Windows message driver mechanism for programming. The Windows Sockets specification is intended to provide application develo

The following is a simple blocking mode server. It is a single-to-single server. If you want to implement a multi-client server, you need to use other I/O models! # Include # Include # Include # Pragma comment (Lib, "libws2_32.lib ")// Buffer size# Define data_bufsize 4096Using namespace STD;Const unsigned int nport = 5151;Int main (INT argc, char * argv []){Wsadata;Socket listen;Socket accept;Char buffer [data_bufsize];// Initialize Winsock 2.2Int r

overlapped I/O or I/O Completion Ports, because these I/O strategies are also thread-friendly. you can tell Winsock about several overlapped blocks, and Winsock will finish sending one before it moves on to the next. this means you can keep a chain of these overlapped blocks, each perhaps added to the chain by a different thread. each thread can also callWsasend ()On the block they added, making your main

Select and WinSock asynchronous IO Models If you want to build a server application on Windows, you must consider the I/O model.Windows provides five I/O models: ■ Select );■ Asynchronous selection (WSAAsyncSelect );■ Event Selection (WSAEventSelect );■ Overlapping I/O (Overlapped I/O );■ Complete Port ). Each model is applicable to a specific application scenario. Programmers should have very clear requirements for their own applications,Make your ch

Introduction to some functions related to sockets 1, read the current error value: Every time an error occurs, if you want to deal with specific problems, then you should call this function to get the error code. int　WSAGetLastError(void ); #define h_errno　 WSAGetLastError() Error value please read Winsock2.h yourself. 2. Converts the host's unsigned Long value to the network byte order (32-bit): Why do you do this? Because different computers use different byte orders to store data. Therefo

I wrote a Winsock component of my own, very simply, send the message to the specified IP specified port, and return the answer message. Technical rough, please advise. Attached source code is as follows: ------------------------------------- VERSION 1.0 CLASS BEGIN MultiUse =-1 ' True persistable = 0 ' notpersistable Databindingbehavior = 0 ' Vbnone DataSourceBehavior = 0 ' Vbnone MTSTransactionMode = 0 ' NotAnMTSObject End Attribute vb_name = "Cls

Review: In the previous article "standard MFC WinSock ActiveX Control Development Example" we detailed the control development process, as well as interface and event Add and respond to methods. Now we will continue to develop the controls that were not written last, and refine the functionality that should be available as a Winsock control. Second, according to the knowledge mentioned in the previous art

The Windows Sockets API interface provided by this system (winking) is a function (routine) as defined in version 1.1 of WINSOCK (as appendix) published on January 20, 1993; includes 30 Berkeley Software Dis Tribution (BSD) function and 16 functions that conform to the Windows message-driven feature. SetSockOpt (): Sets the state of the Socket. Format: int PASCAL FAR setsockopt (SOCKET s,int level,int optname,const char FAR *optval,int); Parameters

Today, we changed the original project from MFC to a non-MFC project, and many errors have occurred. Now we have recorded them as backups. Summary: > C: \ Program Files \ microsoft sdks \ windows \ v6.0a \ include \ ws2def. H (91): Warning c4005: "af_ipx": Macro redefinition1> C: \ Program Files \ microsoft sdks \ windows \ v6.0a \ include \ Winsock. H (460): see the previous definition of "af_ipx ".1> C: \ Program Files \ microsoft sdks \ windows \ v

Socket-related functions 1. Read the current error value: When an error occurs, if you want to handle the problem, you should call this function to obtain the error code. int WSAGetLastError(void ); #define h_errno WSAGetLastError() Read winsock2.h for the error value. 2. Convert the host's unsigned long value to the network byte sequence (32 bits): Why? Because different computers use different bytes to store data. Therefore, any reference from the

Use VC ++ and WinSock to communicate with HTTP servers Ji Hong 1. Introduction---- Windows Socket API is an open network programming interface in Windows that supports multiple protocols. It includes a set of standard Berkeley socket function calls, and important extensions for Windows. Windows Socket, continuously improved and fully supported by many companies, has become a de facto standard for Windows Network Programming. ---- This article describe

1 Communication Program Generally, the Client/Server format is used. This requires that the server host can process requests from multiple clients at the same time. Therefore, you must add multiple Winsock Controls when writing server programs. At the beginning, we first add two Winsock Controls. One of them is used to listen to the online request signal, named listener; the other is the initial connection

A classic entry to WinSock to develop network communication programs For many beginners, a common phenomenon in the development of network communication programs is that it is difficult to start. Many concepts such as sync, async, block, and unblock are confusing for beginners, I only know it, so I d

Windows Sockets is a network programming interface that is widely used and open in windows and supports multiple protocols. 1. connection-oriented stream calling process (TCP ): Server Client Call wsastartup () to initialize Winsock call wsastartup () to initialize Winsock|Call socket () to create a listener SOCKET call socket () to create a session socket|Call BIND () to specify the communication object fo