作业

1、流式域套接字敲一遍。

服务器 server.c 代码

#include <myhead.h>
#define BACKLOG 10

int main(int argc, const char *argv[])
{
	//1、创建流式域套接字
	int oldfd = socket(AF_UNIX,SOCK_STREAM,0);
	if(oldfd == -1)
	{
		perror("socket");
		return -1;
	}

	//2、判断文件存在存在就删除
	if(access("./myserver",F_OK)==0)
	{
		if(unlink("./myserver")==-1)
		{
			perror("unlink");
			return -1;
		}
	}
	printf("删除文件成功\n");

	//3、定义结构体信息并绑定
	struct sockaddr_un server;
	server.sun_family = AF_UNIX;
	strcpy(server.sun_path,"./myserver");

	if(bind(oldfd,(struct sockaddr *)&server,sizeof(server))==-1)
	{
		perror("bind");
		return -1;
	}
	printf("绑定成功\n");

	//4、监听
	if(listen(oldfd,BACKLOG)==-1)
	{
		perror("listen");
		return -1;
	}
	printf("监听成功\n");

	//5、接收客户端请求
	int newfd = accept(oldfd,NULL,NULL);
	if(newfd==-1)
	{
		perror("accept");
		return -1;
	}
	printf("接收客户端请求成功\n");

	//6、数据收发
	char buff[1024];
	while(1)
	{
		int len = recv(newfd,buff,sizeof(buff),0);

		if(len==0)
		{
			printf("客户端跑了\n");
			break;
		}
		strcat(buff,"^_^");
		
		send(newfd,buff,sizeof(buff),0);
		printf("转发成功\n");
	}
	close(newfd);
	close(oldfd);
	return 0;
}

客户端 clinet.c 代码

#include <myhead.h>

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

	//2、判断文件是否存在，存在就删除
	if(access("./myclient",F_OK)==0)
	{
		if(unlink("./myclient")==-1)
		{
			perror("unlink");
			return -1;
		}
	}

	//3、绑定(可选)
	struct sockaddr_un client;
	client.sun_family  =AF_UNIX;
	strcpy(client.sun_path,"./myclient");

	if(bind(oldfd,(struct sockaddr *)&client,sizeof(client))==-1)
	{
		perror("bind");
		return -1;
	}

	struct sockaddr_un server;
	server.sun_family  =AF_UNIX;
	strcpy(server.sun_path,"./myserver");//很重要，连接服务器的文件，而不是自己的文件

	//4、连接服务器
	if(connect(oldfd,(struct sockaddr *)&server,sizeof(server))==-1)
	{
		perror("connect");
		return -1;
	}
	printf("连接服务器成功\n");
	
	//5、收发信息
	char buff[1024];
	while(1)
	{
		bzero(buff,sizeof(buff));

		printf("请输入要发送的信息：");
		fgets(buff,sizeof(buff),stdin);
		buff[strlen(buff)-1] = '\0';

		send(oldfd,buff,sizeof(buff),0);//发送信息
		printf("发送成功\n");

		if(strcmp(buff,"quit")==0)
		{
			break;
		}

		recv(oldfd,buff,sizeof(buff),0);//接收服务器信息
		printf("接收服务器的信息：%s\n",buff);//输出接收到的信息

	}
	close(oldfd);
	return 0;
}

运行结果：

2.、UDP的客户端服务器实现一遍。

UDP服务器 UDPserver.c 代码

#include <myhead.h>
#define SERPORT 6666
#define SERIP "192.168.19.128"

int main(int argc, const char *argv[])
{
	//1、创建套接字
	int oldfd = socket(AF_INET,SOCK_DGRAM,0);//SOCK_DGRAM:UDP
	if(oldfd==-1)
	{
		perror("socket");
		return -1;
	}
	//2、绑定
	struct sockaddr_in sin = {
		.sin_family = AF_INET,
		.sin_port = htons(SERPORT),
		.sin_addr.s_addr = inet_addr(SERIP)
	};
	if(bind(oldfd,(struct sockaddr *)&sin,sizeof(sin))==-1)
	{
		perror("bind");
		return -1;
	}

	//3、收发消息
	struct sockaddr_in cin;
	socklen_t cinlen = sizeof(cin);

	char buff[100];
	while(1)
	{
		memset(buff,0,sizeof(buff));
		//阻塞后就可以了
		int len = recvfrom(oldfd,buff,sizeof(buff),0,(struct sockaddr *)&cin,&cinlen);//不用管谁发的
		if(len==0)
		{
			printf("客户端跑了\n");
			break;
		}
		printf("服务器接收的信息：%s\n",buff);
	}
	close(oldfd);
	return 0;
}

UDP客户端 clinet.c 代码

#include <myhead.h>
#define CLIPORT 6666
#define CLIIP "192.168.19.128"
int main(int argc, const char *argv[])
{
	//1、创建套接字
	int oldfd = socket(AF_INET,SOCK_DGRAM,0);
	if(oldfd ==-1)
	{
		perror("socket");
		return -1;
	}

	//2、收发信息
	struct sockaddr_in cin = {
		.sin_family = AF_INET,
		.sin_port = htons(CLIPORT),
		.sin_addr.s_addr = inet_addr(CLIIP)
	};

	char buff[1024];
	while(1)
	{
		printf("客户端发消息：");
		fgets(buff,sizeof(buff),stdin);
		sendto(oldfd,buff,sizeof(buff),0,(struct sockaddr *)&cin,sizeof(cin));
		printf("发送成功\n");
	}
	close(oldfd);
	return 0;
}

运行结果：

知识梳理

组播

域套接字