[网络协议]【杂项01】TCP结构体通信，win服务端接收，Linux客户端发送

server.cpp

#include "widget.h"
#include <QApplication>
#include <iostream>
#include <winsock2.h>
#include <QThread>
#include <QDebug>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
using namespace  std;

typedef struct{
    double position[3];
    double speed[3];
    int flag;
}data_set;

#pragma comment(lib,"ws2_32.lib")
int main(int argc, char *argv[])
{
    //init
    WSADATA wsaData;
    WSAStartup(MAKEWORD(2,2), &wsaData);

    //socket init
    SOCKET server_sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

    //bind
    sockaddr_in sock_addr;
    memset(&sock_addr, 0, sizeof(sock_addr));
    sock_addr.sin_family = AF_INET;
    sock_addr.sin_addr.s_addr = inet_addr("192.168.1.100");
    sock_addr.sin_port = htons(8000);
    bind(server_sock, (SOCKADDR*)&sock_addr, sizeof(SOCKADDR));

    //listen
    listen(server_sock, 20);

    //accept
    SOCKADDR client_addr;
    int nSize = sizeof(SOCKADDR);
    SOCKET client_sock = accept(server_sock, (SOCKADDR*)&client_addr, &nSize);

    data_set data;
    char buffer[sizeof(data)];
    memset(&data, 0, sizeof(data));
    memset(&buffer, 0, sizeof(buffer));

    while(1){
        QThread::msleep(100);
        //recv
        int ret = recv(client_sock, buffer, sizeof(buffer), NULL);
        memcpy(&data, buffer, sizeof(buffer));
        qDebug()<<ret<<" have receive" << data.flag;
        //printf("%d receive from client: %s\n",ret, recv_buff);
    }

    return 0;
}

client.cpp

#include <iostream>
#include <string>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>

using namespace std;
typedef struct{
	double position[3];
	double speed[3];
	int flag;
}data_set;

int main() {
	//socket
	int sock = socket(AF_INET, SOCK_STREAM, 0);

	//bind
	struct sockaddr_in server_addr;
	memset(&server_addr, 0, sizeof(server_addr));
	server_addr.sin_family = AF_INET;
	server_addr.sin_addr.s_addr = inet_addr("192.168.1.100");
	server_addr.sin_port = htons(8000);
	cout << "ready to connect" << endl;

	//connect
	int ret = connect(sock, (struct sockaddr*)&server_addr, sizeof(server_addr));
	cout << ret << endl;
	sleep(2);
	cout << "ready to write" << endl;

	data_set data;
	char buffer[sizeof(data)];
	memset(&buffer, 0, sizeof(buffer));
	memset(&(data), 0, sizeof(data));
	data.flag=123;

	while(1){
		//write
		data.flag++;
		memcpy(buffer, &(data), sizeof(data));
		write(sock, buffer, sizeof(buffer));
		printf("message write to server: %d\n", data.flag);
		usleep(500000);
	}

	close(sock);
	return 0;
}