day0831

#include 

#define ERR_MSG(msg) do{\
		fprintf(stderr, "__%d__:",__LINE__);\
		perror(msg);\
}while(0)

#define PORT 8888
#define IP "192.168.114.79"
int main(int argc, const char *argv[])
{
	//创建流式套接字 socket
	
	int sfd = socket(AF_INET, SOCK_STREAM,0);
	if(sfd < 0)
	{
		ERR_MSG("socket");
		return -1;
	}
	printf("socket create success sfd = %d\n",sfd);

	//允许端口快速被复用
	int reuse =1;
	if(setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR,&reuse,sizeof(reuse))<0)
	{
		ERR_MSG("setsockopt");
		return -1;
	}
	printf("允许端口快速被复用成功\n");
	//填充地址信息结构体给bind函数绑定，
	//真实的地址信息结构体根据地址族指定  AF_INET:man 7 ip
	struct sockaddr_in sin;
		sin.sin_family      = AF_INET;
		sin.sin_port        = htons(PORT);
		sin.sin_addr.s_addr = inet_addr(IP);

    //绑定服务器的地址信息--->必须绑定 bind
	
	if(bind(sfd, (struct sockaddr*)&sin, sizeof(sin))<0)
	{
		ERR_MSG("bind");
		return -1;
	}
	printf("bind success\n");

	//将套接字设置为被动监听状态 listen
	
	if(listen(sfd, 128) < 0)
	{
		ERR_MSG("listen");
		return -1;
	}printf("listen success\n");

//创建一个读集合
	fd_set readfds, tempfds;
	
	//清空集合
	FD_ZERO(&readfds);
	//将需要检测的文件描述符添加到集合中
	FD_SET(0,&readfds);
	FD_SET(sfd,&readfds);

	int maxfd = sfd;

	int s_res = -1;
	ssize_t res = -1;
	char buf[128] = "";
	int newfd = -1;
	struct sockaddr_in cin;
	socklen_t addrlen = sizeof(cin);

	while(1)
	{
		tempfds = readfds;
		//执行IO多路服用函数
		s_res = select(maxfd+1,&tempfds, NULL,NULL,NULL);
		if(s_res < 0)
		{
			ERR_MSG("setele");
			return -1;
		}
		else if(0 == s_res)
		{
			printf("time out,,\n");
			break;
		}
		printf("__%d__\n",__LINE__);

		if(FD_ISSET(0,&tempfds))
		{
			printf("触发键盘输入事件\n");

			bzero(buf,sizeof(buf));
			fgets(buf, sizeof(buf),stdin);
			buf[strlen(buf)-1] = 0;
			
			printf(": %s\n",buf);
		}
		if(FD_ISSET(sfd,&tempfds))
		{
			printf("触发客户端连接事件\n");
			newfd = accept(sfd, (struct sockaddr*)&cin,&addrlen);
			if(newfd < 0)
			{
				ERR_MSG("accept");
				return -1;
			}
			printf("[%s:%d]客户端连接成功 newfd=%d\n",\
					inet_ntoa(cin.sin_addr),ntohs(cin.sin_port),newfd);
			//将newfd添加到集合中

			FD_SET(newfd, &readfds);
			maxfd = maxfd>newfd ? maxfd : newfd;
		}
		for(int i=4; i<=maxfd; i++)
		{
			if(FD_ISSET(i,&tempfds))
			{
				printf("触发客户端交互事件\n");
				bzero(buf, sizeof(buf));
				//接收
				res = recv(i, buf, sizeof(buf), 0);
				if(res < 0)
				{
					ERR_MSG("recv");
					return -1;
				}
				else if(0 == res)
				{
					printf("[%s:%d]客户端下线 newfd=%d\n",\
							inet_ntoa(cin.sin_addr),ntohs(cin.sin_port),i);

					close(i);
					FD_CLR(i,&readfds);
					continue;
				}
				printf("[%s:%d] newfd=%d\n :%s\n",\
						inet_ntoa(cin.sin_addr),ntohs(cin.sin_port),i,buf);

				//发送
				strcat(buf,"*_*");
				if(send(i, buf, sizeof(buf),0)<0)
				{
					ERR_MSG("send");
					return -1;
				}
				printf("send success\n");

			}
		}
	}

	if(close(sfd) < 0)
	{
		ERR_MSG("close");
		return -1;
	}
	return 0;
}