Windows网络编程

#include <winsock2.h> 

void main(void) 

{ 

   WSADATA              wsaData; 

   SOCKET               ListeningSocket; 

   SOCKET               NewConnection; 

   SOCKADDR_IN          ServerAddr; 

   SOCKADDR_IN          ClientAddr; 

   int                  Port = 5150; 

   // 初始化Windows Socket 2.2 

   WSAStartup(MAKEWORD(2,2), &wsaData); 

   // 创建一个新的Socket来响应client的连接请求 

   ListeningSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); 

   // 填写server地址信息 

   // port为5150 

   // IP地址为INADDR_ANY，注意使用htonl将IP地址转换为网络格式 

   ServerAddr.sin_family = AF_INET; 

   ServerAddr.sin_port = htons(Port);     

   ServerAddr.sin_addr.s_addr = htonl(INADDR_ANY); 

   // 绑定监听port 

   bind(ListeningSocket, (SOCKADDR *)&ServerAddr, sizeof(ServerAddr)); 

   // 開始监听，指定最大同一时候连接数为5 

      listen(ListeningSocket, 5); 

   // 接受新的连接 

   NewConnection = accept(ListeningSocket, (SOCKADDR *) &ClientAddr,&ClientAddrLen)); 

   // 新的连接建立后，就能够互相通信了，在这个简单的样例中，我们直接关闭连接， 

   // 并关闭监听Socket，然后退出应用程序 

   //   

      closesocket(NewConnection); 

      closesocket(ListeningSocket); 

   // 释放Windows Socket DLL的相关资源 

      WSACleanup(); 

} 

# include <winsock2.h> 

void main(void) 

{ 

   WSADATA              wsaData; 

   SOCKET               s; 

   SOCKADDR_IN          ServerAddr; 

   int                  Port = 5150; 

   //初始化Windows Socket 2.2 

   WSAStartup(MAKEWORD(2,2), &wsaData); 

   // 创建一个新的Socket来连接server 

      s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); 

   // 填写client地址信息 

   // port为5150 

   // serverIP地址为"136.149.3.29"，注意使用inet_addr将IP地址转换为网络格式 

      ServerAddr.sin_family = AF_INET; 

      ServerAddr.sin_port = htons(Port);     

      ServerAddr.sin_addr.s_addr = inet_addr("136.149.3.29"); 

   // 向server发出连接请求 

      connect(s, (SOCKADDR *) &ServerAddr, sizeof(ServerAddr)); 

   // 新的连接建立后，就能够互相通信了，在这个简单的样例中，我们直接关闭连接， 

   // 并关闭监听Socket，然后退出应用程序 

      closesocket(s); 

   // 释放Windows Socket DLL的相关资源 

      WSACleanup(); 

}

#define WM_SOCKET WM_USER + 1 

#include <winsock2.h> 

#include <windows.h> 

int WINAPI WinMain(HINSTANCE hInstance, 

    HINSTANCE hPrevInstance, LPSTR lpCmdLine, 

    int nCmdShow) 

{ 

    WSADATA wsd; 

    SOCKET Listen; 

    SOCKADDR_IN InternetAddr; 

    HWND Window; 

    // 创建主窗体 

    Window = CreateWindow(); 

    // 初始化Windows Socket 2.2 

WSAStartup(MAKEWORD(2,2), &wsd); 

// 创建监听Socket 

    Listen = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP); 

    // 设置server地址 

    InternetAddr.sin_family = AF_INET; 

    InternetAddr.sin_addr.s_addr = htonl(INADDR_ANY); 

    InternetAddr.sin_port = htons(5150); 

    // 绑定Socket 

    bind(Listen, (PSOCKADDR) &InternetAddr, sizeof(InternetAddr)); 

    // 设置Windows消息，这样当有Socket事件发生时，窗体就能收到相应的消息通知 

// server一般设置 FD_ACCEPT │ FD_READ | FD_CLOSE 

// client一般设置 FD_CONNECT │ FD_READ | FD_CLOSE 

    WSAAsyncSelect(Listen, Window, WM_SOCKET, FD_ACCEPT │ FD_READ | FD_CLOSE); 

   // 開始监听 

   listen(Listen, 5); 

    // Translate and dispatch window messages 

    // until the application terminates 

    while (1) { 

     // ... 

 } 

} 

BOOL CALLBACK ServerWinProc(HWND hDlg,UINT wMsg, 

    WPARAM wParam, LPARAM lParam) 

{ 

    SOCKET Accept; 

    switch(wMsg) 

    { 

        case WM_PAINT: 

            // Process window paint messages 

            break; 

        case WM_SOCKET: 

            // Determine whether an error occurred on the 

            // socket by using the WSAGETSELECTERROR() macro 

            if (WSAGETSELECTERROR(lParam)) 

            { 

                 // Display the error and close the socket 

                closesocket( (SOCKET) wParam); 

                break; 

            } 

            // Determine what event occurred on the 

            // socket 

            switch(WSAGETSELECTEVENT(lParam)) 

            { 

                case FD_ACCEPT: 

                    // Accept an incoming connection 

                    Accept = accept(wParam, NULL, NULL); 

                    // Prepare accepted socket for read, 

                    // write, and close notification 

                    WSAAsyncSelect(Accept, hDlg, WM_SOCKET, 

                        FD_READ │ FD_WRITE │ FD_CLOSE); 

                    break; 

                case FD_READ: 

                    // Receive data from the socket in 

                    // wParam 

                    break; 

                case FD_WRITE: 

                    // The socket in wParam is ready 

                    // for sending data 

                    break; 

                case FD_CLOSE: 

                    // The connection is now closed 

                    closesocket( (SOCKET)wParam); 

                    break; 

            } 

            break; 

    } 

    return TRUE; 

}