C/S模型

server.c

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <strings.h>
#include <sys/types.h>
#include <pthread.h>
void* fun(void *arg);
int main(){//创建监听套接字
	int sockfd=socket(AF_INET,SOCK_STREAM,0);
	if(sockfd<0){
		perror("socket:");
		return -1;
	}//绑定服务器的地址和端口号
	struct sockaddr_in seraddr;
	seraddr.sin_family=AF_INET;
	seraddr.sin_port=htons(6666);
	seraddr.sin_addr.s_addr=inet_addr("192.168.21.138");
	if(bind(sockfd,(struct sockaddr*)&seraddr,sizeof(seraddr))<0){
		perror("bind");
		return -1;
	}//监听
	if(listen(sockfd,5)<0){
		perror("listen");
		return -1;
	}
	char buf[32]={0};
	pthread_t tid;
	while(1){//接收连接请求
		int comfd=accept(sockfd,NULL,NULL);
		pthread_create(&tid,NULL,fun,&comfd);
		if(comfd>0){
			printf("客户端连接成功\n");
		}
		while(1){
			int ret=read(comfd,buf,sizeof(buf));
			if(ret==0){
				printf("客户端断开连接\n");
				close(comfd);
				break;
			}
			printf("接收客户端的数据:%s\n",buf);
			memset(buf,0,sizeof(buf));
		}
	}
	return 0;
}
void * fun(void *arg){
	int comfd=*(int*)arg;
	char buf[32]={0};
	while(1){
		scanf("%s",buf);
		write(comfd,buf,strlen(buf));
	}
}

client.c

#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<strings.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<netinet/ip.h> 
void *fun(void* arg){
	int clifd=*(int*)arg;
	char buf[32]={0};
	while(1){
		read(clifd,buf,sizeof(buf));
		printf("接收服务器端的数据:%s\n",buf);
		memset(buf,0,sizeof(buf));
	}
} 
int main(){
	//创建一个套接字
	int clifd=socket(AF_INET,SOCK_STREAM,0);
	if(clifd<0){
		perror("socket");
		return -1;
	} 
	struct sockaddr_in seraddr;
	seraddr.sin_family=AF_INET;
	seraddr.sin_port=htons(6666);
	seraddr.sin_addr.s_addr=inet_addr("192.168.21.138");
	//connect(clifd,(struct sockaddr*)&seraddr,sizeof seraddr);
	if(connect(clifd,(struct sockaddr*)&seraddr,sizeof(seraddr))<0){
		perror("connect");
		return -1;
	}
	char buf[32];
	pthread_t tid;
	pthread_create(&tid,NULL,fun,&clifd);
	while(1){
		scanf("%s",buf);
		write(clifd,buf,strlen(buf)); 
	}
	close(clifd);
	return 0;
}