TCPServer 和 TCPClient的实现

 TCPServer的实现

#include <stdio.h>
#include <WINSOCK2.H>
#pragma comment (lib,"WS2_32.LIB")
int main(int ,char **)
{
    WORD wVersionRequested;
    WSADATA wsaData;
    int err;
    wVersionRequested = MAKEWORD( 2, 2 );
    err = WSAStartup( wVersionRequested, &wsaData );
    if ( err != 0 ) {
        return 1;
    }
    if (LOBYTE( wsaData.wVersion ) != 2 || HIBYTE( wsaData.wVersion ) != 2 ) {
        WSACleanup( );
        return 1;
    }
    SOCKET sockServer = socket(AF_INET,SOCK_STREAM,IPPROTO_IP);
    SOCKADDR_IN addrSockServer ;
    addrSockServer.sin_addr.S_un.S_addr=htonl(INADDR_ANY);
    addrSockServer.sin_family = AF_INET;
    addrSockServer.sin_port   = htons(6000);

    if( 0 != bind(sockServer,(SOCKADDR*)&addrSockServer,sizeof(SOCKADDR_IN)))
    {
        printf("bind error");
        return 1;
    }
    if (0 != listen(sockServer,5))
    {

    }
    //定义客户端的socket地址
    SOCKADDR_IN addrClient;
    int len     = sizeof (addrClient);
    SOCKET  sockConn =  accept(sockServer,(SOCKADDR*)&addrClient,&len);
    if (INVALID_SOCKET == sockConn)
    {
        printf("accept error !\n");
    }
    char buffer [256];
    while (true)
    {
        int recvLen =recv(sockConn,buffer,sizeof(buffer),0); //通过返回值判断是否有错误，判断对端socket是否关闭
        if (SOCKET_ERROR == recvLen || 0 == recvLen )
        {
            return 1;
        }
        printf("recvLen is :%d \n" ,recvLen);
        buffer[recvLen]='\0';
        printf(buffer);
        printf("\n");
    }
    return 0;
}

TCPClient的实现

#include <stdio.h>
#include <string.h>
#include <WINSOCK2.H>
#pragma comment (lib,"WS2_32.LIB")
int main(int ,char **)
{
    WORD wVersionRequested;
    WSADATA wsaData;
    int err;
    wVersionRequested = MAKEWORD( 2, 2 );
    err = WSAStartup( wVersionRequested, &wsaData );
    if ( err != 0 ) {
        return 1;
    }
    if (LOBYTE( wsaData.wVersion ) != 2 || HIBYTE( wsaData.wVersion ) != 2 ) {
        WSACleanup( );
        return 1;
    }
    SOCKET sockClient= socket(AF_INET,SOCK_STREAM,IPPROTO_IP);
    SOCKADDR_IN addrSockServer ;
    addrSockServer.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");
    addrSockServer.sin_family = AF_INET;
    addrSockServer.sin_port   = htons(6000);
    //  addrSockServer.sin_zero   = {0};
    if (SOCKET_ERROR==connect(sockClient,(SOCKADDR*)&addrSockServer,sizeof (SOCKADDR)))
    {
        printf("error connect");
        return 1;
    }
    char buffer[256] ={0};
    while (true)
    {
        scanf("%s",buffer);
        if (strcmp(buffer,"exit") == 0)
        {
            break;
        }
//通过返回值判断socket是否断开
        if (SOCKET_ERROR  == send(sockClient,buffer,strlen(buffer),0))
        {
            printf("socket error !\n ");
            break;
        }
    }
    WSACleanup();
    return 0;
}