网络编程day3作业

多进程实现TCP并发服务器

#include

#define PORT 8888
#define IP "192.168.125.130"

void hadder(int signo)
{
	if(signo == SIGCHLD)
	{
		while(waitpid(-1,NULL,WNOHANG) > 0);
	}
}

int information_exchange(int newfd,struct sockaddr_in cin)
{
	char buf[128]="";
	while(1)
	{
		bzero(buf,sizeof(buf));
		int res = recv(newfd,buf,sizeof(buf),0);
		printf("%s\n",buf);
		if(res == 0)
		{
			printf("断开连接\n");
			break;
		}
		//printf("%s\n",buf);
		strcpy(buf,"*-*");
		send(newfd,buf,sizeof(buf),0);
	}
	close(newfd);
}


int main(int argc, const char *argv[])
{
	//给信号重新链接
	if(signal(SIGCHLD,hadder) == SIG_ERR)
	{
		perror("signal error");
		return -1;
	}
	//创建套接字文件
	int sfd = -1;
	if((sfd = socket(AF_INET,SOCK_STREAM,0)) == -1)
	{
		perror("socket error");
		return -1;
	}
	//重复链接设置端口快速重用
	int reuse = -1;
	if(setsockopt(sfd,SOL_SOCKET,SO_REUSEADDR,&reuse,sizeof(reuse)) == -1)
	{
		perror("setsockopt error");
		return -1;
	}
	
	
	//传输IP和端口号
	struct sockaddr_in sin;
	sin.sin_family = AF_INET;
	sin.sin_port = htons(PORT);
	sin.sin_addr.s_addr = inet_addr(IP);
	if(bind(sfd,(struct sockaddr*)&sin,sizeof(sin)) == -1)
	{
		perror("bind error");
		return -1;
	}
	printf("bind success\n");

	//设置监听模式
	if(listen(sfd,128) == -1)
	{
		perror("listen error");
		return -1;
	}
	printf("listen success\n");
	struct sockaddr_in cin;
	socklen_t addrlen = sizeof(cin);
	int newfd = -1;
	pid_t pid = -1;

	while(1)
	{
		//接受客户端链接
		if((newfd = accept(sfd,(struct sockaddr*)&cin,&addrlen)) == -1)
		{
			perror("accept error");
			return -1;
		}
		pid = fork();
		if(pid > 0)
		{
			close(newfd);
			
		}else if(pid == 0)
		{
			close(sfd);
			information_exchange(newfd,cin);
			exit(EXIT_SUCCESS);
		}
		else
		{
			perror("fork error");
			return -1;
		}

	}
	close(sfd);

	return 0;
}

 多线程实现TCP并发服务器

#include

#define PORT 8888
#define IP "192.168.125.130"

struct pthread_d 
{
	int newfd;
	struct sockaddr_in cin;
};

void* information_exchange(void* arg)
{
	int newfd = ((struct pthread_d*)arg)->newfd;
	struct sockaddr_in cin = ((struct pthread_d*)arg)->cin;
	char buf[128]="";
	while(1)
	{
		bzero(buf,sizeof(buf));
		int res = recv(newfd,buf,sizeof(buf),0);
		printf("%s\n",buf);
		if(res == 0)
		{
			printf("断开连接\n");
			break;
		}
		//printf("%s\n",buf);
		strcpy(buf,"*-*");
		send(newfd,buf,sizeof(buf),0);
	}
	close(newfd);
	pthread_exit(NULL);
}


int main(int argc, const char *argv[])
{
	//创建套接字文件
	int sfd = -1;
	if((sfd = socket(AF_INET,SOCK_STREAM,0)) == -1)
	{
		perror("socket error");
		return -1;
	}
	//重复链接设置端口快速重用
	int reuse = -1;
	if(setsockopt(sfd,SOL_SOCKET,SO_REUSEADDR,&reuse,sizeof(reuse)) == -1)
	{
		perror("setsockopt error");
		return -1;
	}
	
	
	//传输IP和端口号
	struct sockaddr_in sin;
	sin.sin_family = AF_INET;
	sin.sin_port = htons(PORT);
	sin.sin_addr.s_addr = inet_addr(IP);
	if(bind(sfd,(struct sockaddr*)&sin,sizeof(sin)) == -1)
	{
		perror("bind error");
		return -1;
	}
	printf("bind success\n");

	//设置监听模式
	if(listen(sfd,128) == -1)
	{
		perror("listen error");
		return -1;
	}
	printf("listen success\n");
	struct sockaddr_in cin;
	socklen_t addrlen = sizeof(cin);
	int newfd = -1;
	pthread_t tid = -1;

	while(1)
	{
		//接受客户端链接
		if((newfd = accept(sfd,(struct sockaddr*)&cin,&addrlen)) == -1)
		{
			perror("accept error");
			return -1;
		}
		struct pthread_d fifo={newfd,cin};
		if(pthread_create(&tid,NULL,information_exchange,&fifo) == -1)
		{
			perror("pthread_create error");
			return -1;
		}
		pthread_detach(tid);
		
	}
	close(sfd);

	return 0;
}

TCP机械臂测试

#include

#define PORT 9998
#define SPORT 8888
#define IP "192.168.125.249"

int main(int argc, const char *argv[])
{
	//创建套接字文件
	int sfd = -1;
	if((sfd = socket(AF_INET,SOCK_STREAM,0)) == -1)
	{
		perror("socket error");
		return -1;
	}
	//重复链接设置端口快速重用
	int reuse = 1;
	if(setsockopt(sfd,SOL_SOCKET,SO_REUSEADDR,&reuse,sizeof(reuse)) == -1)
	{
		perror("setsockopt error");
		return -1;
	}

	/*
	//传输IP和端口号
	struct sockaddr_in sin;
	sin.sin_family = AF_INET;
	sin.sin_port = htons(PORT);
	sin.sin_addr.s_addr = inet_addr(IP);
	if(bind(sfd,(struct sockaddr*)&sin,sizeof(sin)) == -1)
	{
	perror("bind error");
	return -1;
	}
	printf("bind success\n");
	*/
	struct sockaddr_in cin;
	cin.sin_family = AF_INET;
	cin.sin_port = htons(SPORT);
	cin.sin_addr.s_addr = inet_addr(IP);

	if( connect(sfd, (struct sockaddr *)&cin,sizeof(cin)) ==-1)
	{
		perror("connet error");
		return -1;
	}

	char rbuf[5]={0xff,0x02,0x00,0,0xff};
	unsigned char bbuf[5]={0xff,0x02,0x01,90,0xff};
	send(sfd,rbuf,sizeof(rbuf),0);
	send(sfd,bbuf,sizeof(bbuf),0);

	while(1)
	{
		char flag;
		printf("请输入要控制的0|1>>>");
		scanf(" %c",&flag);
		getchar();
		switch(flag)
		{
		case 'a':
		case 'A':
			{
				rbuf[3] += 5; 
				if(rbuf[3] >= 90)
				{
					rbuf[3] = 90;
				}
				send(sfd, rbuf, sizeof(rbuf), 0);
			}break;
		case 'b':
		case 'B':
			{
				rbuf[3] -= 5; 
				if(rbuf[3] <= -90)
				{
					rbuf[3] = -90;
				}
				send(sfd, rbuf, sizeof(rbuf), 0);
			}break;
		case 'C':
		case 'c':
			{
				bbuf[3] += 5; 
				if(bbuf[3] >= 180)
				{
					bbuf[3] = 180;
				}

				send(sfd, bbuf, sizeof(bbuf), 0);
			}
			break;
		case 'D':
		case 'd':
			{
				bbuf[3] -= 5; 
				if(bbuf[3] <= 0)
				{
					bbuf[3] = 0;
				}
				send(sfd, bbuf, sizeof(bbuf), 0);
			}
			break;
		}
	}
		return 0;
}