网络编程 day2

TCP机械臂测试

#include
#define SERIP "192.168.125.181"
#define IP "192.168.125.83"
#define SERPORT 8888
#define PORT 8080

int main(int argc, const char *argv[])
{
	//创建用于通信的套接字文件，返回文件描述符
	int cfd = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
	if(cfd == -1)
	{
		perror("socket error");
		return -1;
	}
	//绑定
	struct sockaddr_in cin;
	cin.sin_family = AF_INET;
	cin.sin_port = htons(PORT);
	cin.sin_addr.s_addr = inet_addr(IP);
	if(bind(cfd,(struct sockaddr *)&cin,sizeof(cin)) == -1)
	{
		perror("bind error");
		return -1;
	}
	printf("bind success _%d_\n",__LINE__);
	//连接服务器
	struct sockaddr_in sin;
	sin.sin_family = AF_INET;
	sin.sin_port = htons(SERPORT);
	sin.sin_addr.s_addr = inet_addr(SERIP);
	if(connect(cfd,(struct sockaddr *)&sin,sizeof(sin)) == -1)
	{
		perror("connect error");
		return -1;
	}
	printf("connect success _%d_\n",__LINE__);

	//通信
	char red_buf[5] = {0xff,0x02,0x00,0x00,0xff};
	unsigned char blue_buf[5] = {0xff,0x02,0x01,0x5a,0xff};
	char key = 0;
	while(1)
	{
		scanf("%c",&key);
		getchar();
		switch(key)
		{
		case 'a':
		case 'A':
			{
				red_buf[3] += 2;
				if(red_buf[3] >90)
					red_buf[3] = 90;
				if(send(cfd,red_buf,sizeof(red_buf),0) == -1)
				{
					perror("send error");
					return -1;
				}
				break;
			}
		case 'd':
		case 'D':
			{
				red_buf[3] -= 2;
				if(red_buf[3] < -90)
					red_buf[3] = -90;
				if(send(cfd,red_buf,sizeof(red_buf),0) == -1)
				{
					perror("send error");
					return -1;
				}
				break;
			}
		case 'w':
		case 'W':
			{
				blue_buf[3] += 2;
				if(blue_buf[3] > 180)
					blue_buf[3] = 180;
				if(send(cfd,blue_buf,sizeof(blue_buf),0) == -1)
				{
					perror("send error");
					return -1;
				}
				break;
			}
		case 's':
		case 'S':
			{
				if(blue_buf[3] < 2)
				{
					blue_buf[3] = 0;
				}

				else
				{
					blue_buf[3] -= 2;
				}

				if(send(cfd,blue_buf,sizeof(blue_buf),0) == -1)
				{
					perror("send error");
					return -1;
				}
				break;
			}
		case 'q':
		case 'Q':
			{
				break;
			}
		default:
			{
				printf("输入有误，请重新输入\n");
				break;
			}
		}
		if(key == 'q'||key == 'Q')
			break;
	}
	//关闭套接字文件描述符
	close(cfd);
	return 0;
}

TCP基础通信模型服务器端

#include
#define PORT 8888
#define IP "192.168.125.83"

int main(int argc, const char *argv[])
{
	//创建套接字文件，返回用于连接的文件描述符
	int sfd = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);

	if(sfd == -1)
	{
		perror("socket error");
		return -1;
	}
	//将端口号快速重用
	int reuse = 1;
	if(setsockopt(sfd,SOL_SOCKET,SO_REUSEADDR,&reuse,sizeof(reuse)) == -1)
	{
		perror("reuse error");
		return -1;
	}
	//填充地址信息结构体
	struct sockaddr_in sin;
	sin.sin_family = AF_INET;
	sin.sin_port = htons(PORT);
	sin.sin_addr.s_addr = inet_addr(IP);
	//绑定服务器地址端口号到套接字
	if(bind(sfd,(struct sockaddr*)&sin,sizeof(sin)) == -1)
	{
		perror("bind error");
		return -1;
	}
	printf("bind success: %s  %s  %d\n",__FILE__,__func__,__LINE__);
	//将套接字设置成被动监听状态
	if(listen(sfd,128) == -1)
	{
		perror("listen error");
		return -1;
	}
	//阻塞等待接收客户端连接请求，创建用于通信的套接字
	struct sockaddr_in cin;
	socklen_t socklen = sizeof(cin);
	int newfd = accept(sfd,(struct sockaddr*)&cin,&socklen);
	if(newfd == -1)
	{
		perror("accept error");
		return -1;
	}
	printf("[%s : %d]连接成功:\n",inet_ntoa(cin.sin_addr),ntohs(cin.sin_port));
	//跟客户端进行通信
	char buf[128] = "";
	while(1)
	{
		bzero(buf,sizeof(buf));
		int res = recv(newfd,buf,sizeof(buf),0);
		if(res == 0)
		{
			printf("客户端已下线\n");
			break;
		}
		printf("收到消息[%s : %d]:%s\n",inet_ntoa(cin.sin_addr),ntohs(cin.sin_port),buf);

		strcat(buf,"*_*");
		send(newfd,buf,sizeof(buf),0);
		printf("发送成功\n");
	}
	//关闭套接字
	close(newfd);
	close(sfd);
	return 0;
}

 TCP基础通信模型客户端

#include
#define SERIP "192.168.125.83"
#define IP "192.168.125.83"
#define SERPORT 8888
#define PORT 8080

int main(int argc, const char *argv[])
{
	//创建用于通信的套接字文件，返回文件描述符
	int cfd = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
	if(cfd == -1)
	{
		perror("socket error");
		return -1;
	}
	//可以绑定，也可以不绑定
	struct sockaddr_in cin;
	cin.sin_family = AF_INET;
	cin.sin_port = htons(PORT);
	cin.sin_addr.s_addr = inet_addr(IP);
	if(bind(cfd,(struct sockaddr *)&cin,sizeof(cin)) == -1)
	{
		perror("bind error");
		return -1;
	}
	//连接服务器
	struct sockaddr_in sin;
	sin.sin_family = AF_INET;
	sin.sin_port = htons(SERPORT);
	sin.sin_addr.s_addr = inet_addr(SERIP);
	if(connect(cfd,(struct sockaddr *)&sin,sizeof(sin)) == -1)
	{
		perror("connect error");
		return -1;
	}

	//通信
	char buf[128] = "";
	while(1)
	{
		bzero(buf,sizeof(buf));
		printf("请输入>>>");
		fgets(buf,sizeof(buf),stdin);
		buf[strlen(buf)-1] = 0;

		send(cfd,buf,sizeof(buf),0);
		if(strcmp(buf,"quit") == 0)
			break;
		recv(cfd,buf,sizeof(buf),0);
		printf("收到服务器消息：%s\n",buf);
	}
	//关闭套接字文件描述符
	close(cfd);
	return 0;
}