socket例子

我就是我 2021-12-22 14:47 302阅读 0赞

### Complete Client Code ###

#include <stdio.h>
    #include "winsock2.h"
    
    void main() {
    
        // Initialize Winsock.
        WSADATA wsaData;
        int iResult = WSAStartup( MAKEWORD(2,2), &wsaData );
        if ( iResult != NO_ERROR )
            printf("Error at WSAStartup()\n");
    
        // Create a socket.
        SOCKET m_socket;
        m_socket = socket( AF_INET, SOCK_STREAM, IPPROTO_TCP );
    
        if ( m_socket == INVALID_SOCKET ) {
            printf( "Error at socket(): %ld\n", WSAGetLastError() );
            WSACleanup();
            return;
        }
    
        // Connect to a server.
        sockaddr_in clientService;
    
        clientService.sin_family = AF_INET;
        clientService.sin_addr.s_addr = inet_addr( "127.0.0.1" );
        clientService.sin_port = htons( 27015 );
    
        if ( connect( m_socket, (SOCKADDR*) &clientService, sizeof(clientService) ) == SOCKET_ERROR) {
            printf( "Failed to connect.\n" );
            WSACleanup();
            return;
        }
    
        // Send and receive data.
        int bytesSent;
        int bytesRecv = SOCKET_ERROR;
        char sendbuf[32] = "Client: Sending data.";
        char recvbuf[32] = "";
    
        bytesSent = send( m_socket, sendbuf, strlen(sendbuf), 0 );
        printf( "Bytes Sent: %ld\n", bytesSent );
    
        while( bytesRecv == SOCKET_ERROR ) {
            bytesRecv = recv( m_socket, recvbuf, 32, 0 );
            if ( bytesRecv == 0 || bytesRecv == WSAECONNRESET ) {
                printf( "Connection Closed.\n");
                break;
            }
            if (bytesRecv < 0)
                return;
            printf( "Bytes Recv: %ld\n", bytesRecv );
        }
    
        return;
    }

\---------------------------------------------------------------------------------------------------------------------------

### Complete Server Code    ###

#include <stdio.h>
    #include "winsock2.h"
    
    void main() {
    
        // Initialize Winsock.
        WSADATA wsaData;
        int iResult = WSAStartup( MAKEWORD(2,2), &wsaData );
        if ( iResult != NO_ERROR )
            printf("Error at WSAStartup()\n");
    
        // Create a socket.
        SOCKET m_socket;
        m_socket = socket( AF_INET, SOCK_STREAM, IPPROTO_TCP );
    
        if ( m_socket == INVALID_SOCKET ) {
            printf( "Error at socket(): %ld\n", WSAGetLastError() );
            WSACleanup();
            return;
        }
    
        // Bind the socket.
        sockaddr_in service;
    
        service.sin_family = AF_INET;
        service.sin_addr.s_addr = inet_addr( "127.0.0.1" );
        service.sin_port = htons( 27015 );
    
        if ( bind( m_socket, (SOCKADDR*) &service, sizeof(service) ) == SOCKET_ERROR ) {
            printf( "bind() failed.\n" );
            closesocket(m_socket);
            return;
        }
        
        // Listen on the socket.
        if ( listen( m_socket, 1 ) == SOCKET_ERROR )
            printf( "Error listening on socket.\n");
    
        // Accept connections.
        SOCKET AcceptSocket;
    
        printf( "Waiting for a client to connect...\n" );
        while (1) {
            AcceptSocket = SOCKET_ERROR;
            while ( AcceptSocket == SOCKET_ERROR ) {
                AcceptSocket = accept( m_socket, NULL, NULL );
            }
            printf( "Client Connected.\n");
            m_socket = AcceptSocket; 
            break;
        }
        
        // Send and receive data.
        int bytesSent;
        int bytesRecv = SOCKET_ERROR;
        char sendbuf[32] = "Server: Sending Data.";
        char recvbuf[32] = "";
        
        bytesRecv = recv( m_socket, recvbuf, 32, 0 );
        printf( "Bytes Recv: %ld\n", bytesRecv );
        
        bytesSent = send( m_socket, sendbuf, strlen(sendbuf), 0 );
        printf( "Bytes Sent: %ld\n", bytesSent );
    
        return;
    }

转载于:https://www.cnblogs.com/fanzi2009/archive/2010/08/06/1794091.html