Chapter 1:

An Intro to Windows Socket (Winsock2) Programming

C & Winsock: The Kick Start programming tutorials

C & Linux Socket

Program Example Index

C#, VB .NET & C++/CLI Network Programming

Windows Device Driver Development & Program Examples

ReactOS - Windows OS Binary Compatible Open Source Project - C & C++

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What do we have in this chapter?

1. Winsock Headers and Libraries

Initializing Winsock

Error Checking and Handling

2. Addressing a Protocol

Addressing IPv4

Internet Addresses

Some Note

inet_ntoa() Function

InetNtop() Function

InetPton() Function

Byte Ordering

Creating a Socket

Connection-Oriented Communication

Server API Functions

Binding, bind()

Listening, listen()

Accepting Connections, accept()

3. Client API Functions

TCP States

connect()

4. Data Transmission

send() and WSASend()

WSASendDisconnect()

Out-of-Band Data

recv() and WSARecv()

WSARecvDisconnect()

Stream Protocols

Scatter-Gather I/O

Breaking the Connection

shutdown()

closesocket()

TCP Receiver/Server With select() Example

5. TCP Sender/client Program Example

Testing the TCP Client and Server Programs

Testing the TCP Client and Server Programs in Private Network

6. Connectionless Communication

Receiver

Sender

7. Running Both the UDP Receiver/Server and UDP Sender/Client

Testing the UDP Client and select Server Programs in Private Network

Message-Based Protocols

Releasing Socket Resources

Miscellaneous APIs

getpeername()

getsockname()

WSADuplicateSocket()

Windows CE

Summary

In this chapter, we presented the core Winsock functions that are required for connection-oriented and connectionless communication using the TCP and UDP protocols specifically. For connection-oriented communication, we demonstrated how to accept a client connection and how to establish a client connection to a server. We covered the semantics for session-oriented data-send operations and data-receive operations. For connectionless communication, we also described how to send and receive data. Since this chapter was designed to introduce the core Winsock APIs, we did not address network programming performance considerations. Later, we will address performance issues and introduce the Microsoft Winsock extensions TransmitFile(), TransmitPackets(), AcceptEx(), GetAcceptExSockaddrs(), ConnectEx(), DisconnectEx(), and WSARecvMsg(), which can help you write high performance, scalable Winsock applications. Our discussions so far have demonstrated using Winsock with just the IPv4 protocol.

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