[国嵌攻略][093][并发服务器设计]

#include <sys/socket.h>
#include <netinet/in.h>
#include <strings.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>

#define SERVER_PORT 3333

void main(){
 	//创建标识
	int serverfd;
	
	serverfd = socket(AF_INET, SOCK_STREAM, 0);   //建立TCP连接
	
	//绑定地址
	struct sockaddr_in serverAddr;
	
	serverAddr.sin_family = AF_INET;                   //设置协议
	serverAddr.sin_port = htons(SERVER_PORT);          //设置端口
	serverAddr.sin_addr.s_addr = htonl(INADDR_ANY);    //设置地址
	bzero(serverAddr.sin_zero, 8);                     //设置为零
	
	bind(serverfd, (struct sockaddr *)&serverAddr, sizeof(struct sockaddr));
	
	//监听端口
	listen(serverfd, 10);
	
	while(1){
		//等待连接
		socklen_t clientAddrLen;
		struct sockaddr_in clientAddr;
		int clientfd;

		clientAddrLen = sizeof(struct sockaddr);
		clientfd = accept(serverfd, (struct sockaddr *)&clientAddr, &clientAddrLen);
		
		//创建进程
		int pid;
		
		pid = fork();
		if(pid == 0){
			//接收数据
			char buffer[2048];
			
			recv(clientfd, buffer, sizeof(buffer), 0);
			
			//显示数据
			char *clientIPAddr;
			
			clientIPAddr = (char *)inet_ntoa(clientAddr.sin_addr.s_addr);
			printf("server recvice from %s:\n%s", clientIPAddr, buffer);
			
			//关闭连接
			close(clientfd);
			close(serverfd);
			
			//结束进程
			exit(0);
		}

		//关闭连接
		close(clientfd);
	}
	
	//关闭连接
	close(serverfd);
}

#include <sys/socket.h>
#include <netinet/in.h>
#include <strings.h>
#include <stdio.h>

#define SERVER_PORT 3333

int main(int argc, char **argv){
	//参数检查
	if(argc != 2){
		printf("Usage:\n\t./client <ip address>\n");
		return -1;
	}
	
	//创建标识
	int clientfd;
	
	clientfd = socket(AF_INET, SOCK_STREAM, 0);   //建立TCP连接
	
	//建立连接
	struct sockaddr_in serverAddr;
	
	serverAddr.sin_family = AF_INET;                   //设置协议
	serverAddr.sin_port = htons(SERVER_PORT);          //设置端口
	serverAddr.sin_addr.s_addr = inet_addr(argv[1]);   //设置地址
	bzero(serverAddr.sin_zero, 8);                     //设置为零
	
	connect(clientfd, (struct sockaddr *)&serverAddr, sizeof(struct sockaddr));

	//输入数据
	char buffer[2048];
	
	printf("client send to %s:\n", argv[1]);
	fgets(buffer, sizeof(buffer), stdin);
	
	//发送数据
	send(clientfd, buffer, sizeof(buffer), 0);
	
	//关闭连接
	close(clientfd);
	
	return 0;
}