TCP数据流

#include <iostream>
using namespace std;
#define WIN32_LEAN_AND_MEAN

//#include <windows.h>其中包含winsock.h，与winsock2.h重定义
#include <winsock2.h>
#include <ws2tcpip.h>
#include <stdio.h>

#pragma comment(lib, "ws2_32.lib")

int main()
{
    //1.加载库
    WORD wVersionRequested;
    WSADATA wsaData;
    wVersionRequested = MAKEWORD(2, 2);

    int err = WSAStartup(wVersionRequested, &wsaData);
    if (err != 0) {
        printf("WSAStartup failed with error: %d\n", err);
        return 1;
    }

    if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) {
        printf("Could not find a usable version of Winsock.dll\n");
        WSACleanup();
        return 1;
    }
    else
        printf("The Winsock 2.2 dll was found okay\n");
    //2.Socket 
    SOCKET socklisten = socket(AF_INET ,SOCK_STREAM ,IPPROTO_TCP );
    if(socklisten == INVALID_SOCKET)
    {
        WSACleanup();
        return 1;
    }
    //3.bind
    SOCKADDR_IN addr;
    addr.sin_family = AF_INET;
    addr.sin_addr.S_un.S_addr = inet_addr("192.168.3.154");//INADDR_ANY任意IP
    addr.sin_port = htons(1234);
    if(SOCKET_ERROR == bind(socklisten,(sockaddr*)&addr , sizeof(addr)))
    {
        closesocket(socklisten);

        WSACleanup();
        return 1;
    }
    //4.listen
    if(SOCKET_ERROR == listen(socklisten ,10))
    {
        closesocket(socklisten);
        WSACleanup();
        return 1;
    }
    //5.accept
    SOCKET sockWaiter = accept(socklisten,0,0);
    if(INVALID_SOCKET == sockWaiter)
    {
        closesocket(socklisten);
        WSACleanup();
        return 1;
    }
    //6.recv,send
    char str[1024] = {0};
    int nlen;
    while(1)
    {
        nlen = recv(sockWaiter,str,sizeof(str),0);
        if(nlen > 0)
        {
            cout<<str<<endl;
            cin>>str;
            send(sockWaiter ,str,sizeof(str),0);
        }
    }
    //7.
    closesocket(sockWaiter);
    closesocket(socklisten);
    //8.
    WSACleanup();
    system("pause");
    return 0;
}

using namespace std;
#define WIN32_LEAN_AND_MEAN

//#include <windows.h>其中包含winsock.h，与winsock2.h重定义
#include <winsock2.h>
#include <ws2tcpip.h>
#include <stdio.h>

#pragma comment(lib, "ws2_32.lib")

int main()
{

    WORD wVersionRequested;
    WSADATA wsaData;
    wVersionRequested = MAKEWORD(2, 2);

    int err = WSAStartup(wVersionRequested, &wsaData);
    if (err != 0) {
        printf("WSAStartup failed with error: %d\n", err);
        return 1;
    }
    if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) {
        printf("Could not find a usable version of Winsock.dll\n");
        WSACleanup();
        return 1;
    }
    else
        printf("The Winsock 2.2 dll was found okay\n");
    //2.Socket 
    SOCKET sockConnect = socket(AF_INET ,SOCK_STREAM ,IPPROTO_TCP );
    if(sockConnect == INVALID_SOCKET)
    {
        WSACleanup();
        return 1;
    }
    //3.Connect
    SOCKADDR_IN addr;
    addr.sin_family = AF_INET;
    addr.sin_addr.S_un.S_addr = inet_addr("192.168.3.154");
    addr.sin_port = htons(1234);
    if(SOCKET_ERROR == connect(sockConnect,(sockaddr*)&addr , sizeof(addr)))
    {
        closesocket(sockConnect);
        WSACleanup();
        return 1;
    }
    //4.recv,send
    char str[1024] = {0};
    int nlen;
    while(1)
    {
        cin>>str;
        nlen = send(sockConnect ,str,sizeof(str),0);
        if(nlen > 0)
        {
            nlen = recv(sockConnect,str,sizeof(str),0);
            if(nlen > 0)
                cout<<str<<endl;
        }
    }
    //5.关闭套接字
    closesocket(sockConnect);
    //6.关闭库
    WSACleanup();
    system("pause");

    return 0;
}