从零构建自己的远控•TCP构建socket通信(6)

也是先tcp模拟简单通信后面封装成类

服务器

// ConsoleApplication1.cpp : 此文件包含 "main" 函数。程序执行将在此处开始并结束。
//


#include <stdio.h>
#include <winsock2.h>
#include <WS2tcpip.h>
#pragma comment(lib,"ws2_32.lib")
#include <string.h>
#include <map>

//int _stdcall
DWORD WINAPI RecvThread(LPVOID lpParameter)//接收消息线程
{
    SOCKET sTCP = (SOCKET)lpParameter;
    char szBuffer[256];//缓冲区 代表每次从从缓存区拿256个字节处理

    while (1)
    {
        int nLen;
        //先接收长度

        recv(sTCP, (char*)&nLen, sizeof(nLen), 0);//先拿长度
        //注意客户端发送包过大 缓冲区需要 for循环接收数据
        int nRet = recv(sTCP, szBuffer, nLen, 0);//告诉从包里拿多长数据

        if (nRet <= 0)
        {
            printf("WSAStartup error%08X", WSAGetLastError());
            break;
        }
        szBuffer[nRet] = '';
        printf("buf:%s len:%d
", szBuffer, nRet);
    }

    //nagle算法
    //关闭初始化
    closesocket(sTCP);
    return 0;
}

int main()
{
    WSADATA wsaData;
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
    {
        printf("WSAStartup error%08X", WSAGetLastError());
        return 0;
    }
    //1.初始化套接字
    SOCKET s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

    //2.绑定端口
    sockaddr_in addr;
    //转换大小尾
    addr.sin_family = AF_INET;
    addr.sin_port = htons(12345);
    inet_pton(AF_INET, "127.0.0.1", &addr.sin_addr);
    if (bind(s, (sockaddr*)&addr, sizeof(addr)) != 0)
    {
        printf("WSAStartup error%08X", WSAGetLastError());
        return 0;
    }
    //3.监听  设置队列连接数
    listen(s, 100);

    //4.收客户连接
    sockaddr_in caddr; //客户端地址
    int nLength = sizeof(caddr);
    while (true)
    {
        SOCKET sTCP = accept(s, (sockaddr*)&caddr, &nLength);
        //收发数据      返回成功说明已经3次握手连接
        char IPdotdec[20]; //存放点分十进制IP地址
        inet_ntop(AF_INET, &caddr.sin_addr, IPdotdec, 16);//点阵转换ip
        printf("ip:%s，port:%d
", IPdotdec, htons(caddr.sin_port));
        CreateThread(NULL,0, RecvThread,(LPVOID)sTCP, 0,NULL);//循环线程

        
    }


    //nagle算法
    //关闭初始化
    closesocket(s);
    //反初始化库
    WSACleanup();
}

客户端

// ConsoleApplication2.cpp : 此文件包含 "main" 函数。程序执行将在此处开始并结束。
//

#include <stdio.h>
#include <winsock2.h>
#include <WS2tcpip.h>
#pragma comment(lib,"ws2_32.lib")

DWORD WINAPI RecvThread(LPVOID lpParameter)//接收消息线程
{
    SOCKET s = (SOCKET)lpParameter;
    char szBuffer[256];
    sockaddr_in caddr; //客户端地址
    int nLength = sizeof(caddr);
    while (1)
    {
        //接收  返回接收长度
        int nRet = recvfrom(s, szBuffer, sizeof(szBuffer), 0, (sockaddr*)&caddr, &nLength);
        if (nRet == SOCKET_ERROR)
        {
            printf("recvfrom error %08X", WSAGetLastError());
            break;
        }
        szBuffer[nRet] = '';

        char IPdotdec[20]; //存放点分十进制IP地址
        struct in_addr s; // IPv4地址结构体
        inet_ntop(AF_INET, &caddr.sin_addr, IPdotdec, 16);//点阵转换ip
        printf("ip:%s port:%d  data:%s bytes:%d
", IPdotdec, caddr.sin_port, szBuffer, nRet);
    }
}

int main()
{
    WSADATA wsaData;
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
    {
        printf("WSAStartup error%08X", WSAGetLastError());
        return 0;
    }
    //1.初始化套接字
    SOCKET s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);



    //2.l连接
    sockaddr_in addr;
    //转换大小尾
    addr.sin_family = AF_INET;
    addr.sin_port = htons(12345);
    inet_pton(AF_INET, "127.0.0.1", &addr.sin_addr);
    if (connect(s, (sockaddr*)&addr, sizeof(addr)) == SOCKET_ERROR)
    {
        printf("connect error%08X", WSAGetLastError());
        return 0;
    }
    printf("connect  ok");

    //3.发数据
    char szBuffer[256];
    while (1)
    {
        scanf_s("%s", szBuffer, sizeof(szBuffer));
        int nLen = strlen(szBuffer);
        fflush(stdin);
        //发送数据
        //    int nRet = send(s, szBuffer, strlen(szBuffer), 0); 防止粘包
        send(s, (char *)&nLen, sizeof(nLen), 0);
        int nRet=send(s,szBuffer, nLen, 0);
        if (nRet <= 0)
        {
            printf("connect error%08X", WSAGetLastError());
            break;
        }


    }
    //关闭初始化
    closesocket(s);
    //反初始化库
    WSACleanup();
}