2025.01.01（IO模型分类，超时检测，抓包分析，机械臂客户端）

作业：基于机械臂服务器写出客户端代码并执行

#include <myhead.h>
#define IP "192.168.124.62"
#define PORT 8888

int main(int argc, const char *argv[])
{
	//1.创建套接字
	int cfd = socket(AF_INET,SOCK_STREAM,0);
	if(cfd==-1)
	{
		perror("socket");
		return -1;
	}

	//2.绑定
	
	//3.连接
	//3-1.填充地址信息结构体
	struct sockaddr_in aaa;
	aaa.sin_family = AF_INET;
	aaa.sin_port = htons(PORT);
	aaa.sin_addr.s_addr = inet_addr(IP);

	//3-2.连接服务器
	if(connect(cfd,(struct sockaddr *)&aaa,sizeof(aaa))==-1)
	{
		perror("connect");
		return -1;
	}

	//4.向服务器发送消息
	char rbuf[5] = {0xff,0x02,0x00,-0x5A,0xff}; 	//红色臂
	unsigned char bbuf[5] = {0xff,0x02,0x01,0x00,0xff}; 	//蓝色臂

	//先发送初始数据
	send(cfd,rbuf,sizeof(rbuf),0);
	sleep(1);
	send(cfd,bbuf,sizeof(bbuf),0);

	//通过键盘控制数据的收发
	char bbb;
	while(1)
	{
		scanf("%c",&bbb);
		while(getchar()!='\n');

		switch(bbb)
		{
			//红色臂
			case 'w':
				rbuf[3] += 5; 	//增加5度
				if(rbuf[3]>=90)
				{
					rbuf[3] = 90;
				}
				send(cfd,rbuf,sizeof(rbuf),0);
				break;
			case 'a':
					rbuf[3] -= 5; //减少5度
				if(rbuf[3]<=-90)
				{
					rbuf[3] = -90;
				}
				send(cfd,rbuf,sizeof(rbuf),0);
				break;
		//蓝色臂
			case 's':
					bbuf[3] += 5; //增加5度
				if(bbuf[3] > 180)
				{
					bbuf[3] = 180;
				}
				send(cfd,bbuf,sizeof(bbuf),0);
				break;

			case 'd':
				bbuf[3] -= 5; 	//减少5度
				if(bbuf[3] < 0)
				{
					bbuf[3] = 0;
				}
				send(cfd,bbuf,sizeof(bbuf),0);
				break;

			case 'q': 			//初始化
				rbuf[3] = -90;
				bbuf[3] = 0;
				send(cfd,rbuf,sizeof(rbuf),0);
				send(cfd,bbuf,sizeof(bbuf),0);
				break;
		}
	}
	return 0;
}