Linux下socket编程（实现回声客户端功能（修改版while（）循环接收））

server.cpp

#include 
#include 
#include 
#include 
#include 
#include 
#include 

#define  BUF_SIZE 100

int main()
{
	//创建套接字
	int serv_sock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
	//将套接字和ip、端口绑定
	struct sockaddr_in serv_addr;
	memset(&serv_addr,0,sizeof(serv_addr));//每个字节都用0填充
	serv_addr.sin_family=AF_INET;//使用ipv4地址
	serv_addr.sin_addr.s_addr=inet_addr("127.0.0.1");
	serv_addr.sin_port=htons(9000);
	bind(serv_sock,(struct sockaddr*)&serv_addr,sizeof(serv_addr));

	//进入监听状态，等待用户发起请求
	listen(serv_sock,20);

	//接收客户端请求
	struct sockaddr_in clnt_addr;
	socklen_t clnt_addr_size=sizeof(clnt_addr);
	char buffer[BUF_SIZE]={};
	while(1)
	{
		int clnt_sock=accept(serv_sock,(struct sockaddr*)
					&clnt_addr,&clnt_addr_size);
			
		read(clnt_sock,buffer,sizeof(buffer));
		printf("服务器端接收到的消息：%s\n",buffer);
		write(clnt_sock,buffer,sizeof(buffer));
		
		close(clnt_sock); //关闭套接字
		memset(buffer,0,BUF_SIZE);//重置缓冲区
	}
	close(serv_sock);
	
	return 0;
}

client.cpp

#include 
#include 
#include 
#include 
#include 
#include 

#define  BUF_SIZE 100

int main()
{

	//向服务器发起请求
	struct sockaddr_in serv_addr;
	memset(&serv_addr,0,sizeof(serv_addr));
	serv_addr.sin_family=AF_INET;
	serv_addr.sin_addr.s_addr=inet_addr("127.0.0.1");
	serv_addr.sin_port=htons(9000);

	char buffersend[BUF_SIZE]={0};
	char bufferrecv[BUF_SIZE]={0};
	while(1)
	{
		//创建套接字
		int sock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
		connect(sock,(struct sockaddr*)&serv_addr,sizeof(serv_addr));

		//向服务器发送数据
		printf("输入发送信息：");
		fgets(buffersend,100,stdin);
		write(sock,buffersend,sizeof(buffersend));
		//读取服务器返回的数据
		read(sock,bufferrecv,sizeof(bufferrecv)-1);
		//输出接收到的消息
		printf("接收到的消息：%s\n",bufferrecv);

		memset(buffersend,0,BUF_SIZE);
		memset(bufferrecv,0,BUF_SIZE);
		//关闭套接字
		close(sock);
	}
	return 0;
}