linux阻塞式网络小程序

来源：互联网发布：windows 虚拟桌面软件编辑：程序博客网时间：2024/04/26 08:03
/*server.c*/#include <sys/types.h>#include <sys/socket.h>#include <stdio.h>#include <stdlib.h>#include <errno.h>#include <string.h>#include <unistd.h>#include <netinet/in.h>#define PORT4321#define BUFFER_SIZE1024#define MAX_PLAYERS 3  //设定最大能连接的客户端数目#define CARDS_NUM   54int main(){struct sockaddr_in server_sockaddr,client_sockaddr[3];int sin_size,recvbytes;int sockfd, client_fd[3];char buf[BUFFER_SIZE];int i, j,n;int nPlayers=0;//玩家计数，总共允许三个玩家char Cards[54];//表示54张牌char playerCards[3][17];//表示要发给三个玩家的牌，每个玩家17张牌int  card_select;/*建立socket连接*/if ((sockfd = socket(AF_INET,SOCK_STREAM,0))== -1){perror("socket");exit(1);}printf("Server Socket id = %d\n",sockfd);/*设置sockaddr_in 结构体中相关参数*/server_sockaddr.sin_family = AF_INET;server_sockaddr.sin_port = htons(PORT);server_sockaddr.sin_addr.s_addr = INADDR_ANY; //注意结构体里面还有的结构体bzero(&(server_sockaddr.sin_zero), 8);  //包含在string.h头文件中int k = 1;/* 允许重复使用本地地址与套接字进行绑定 */setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &k, sizeof(i));  ///*绑定函数bind()*/if (bind(sockfd, (struct sockaddr *)&server_sockaddr, //使用前将之前定义的地址结构类型强制转化为标准的IP地址结构体sizeof(struct sockaddr)) == -1){perror("bind");exit(1);  //包含在stdlib.h头文件中}printf("Bind success!\n");/*调用listen()函数，创建未处理请求的队列*/if (listen(sockfd, MAX_PLAYERS) == -1){perror("listen");exit(1);}printf("Listening....\n");/*调用accept()函数，等待客户端的连接*/for(i=0; i<MAX_PLAYERS; i++){    if ((client_fd[i] = accept(sockfd, (struct sockaddr *)&client_sockaddr[i], &sin_size)) == -1)  //获得三个不同套接字的描述符{    perror("accept");    exit(1);}nPlayers++;printf("Player %d is ready!\n", nPlayers);}printf("Ready to Send Cards!\n");    sleep(3);  //包含在unistd.h头文件中//srand(time(systime));if(nPlayers==3){for(n=0;n<54;n++)/*用1-54分别表示每一张牌*/{            Cards[n] = n+1;}for (n=0;n<54;n++)//洗牌{/*随机选中一张牌，依次跟第n张牌交换位置*/card_select = (int)rand() %(CARDS_NUM);//printf("%d ",card_select);char cardTemp = Cards[n];Cards[n] = Cards[card_select];            Cards[card_select] = cardTemp;}for(i = 0; i<MAX_PLAYERS; i++)for( j=0;j<17;j++){                    playerCards[i][j] = Cards[i*17 + j];}for( i=0; i<MAX_PLAYERS; i++){printf("Send cards to player %d\n", i+1);sleep(3);                             if(send(client_fd[i], playerCards[i], 17, 0) == -1)    close(client_fd[i]);  //如果发送出错，就关闭该套接字}}while(1){ //接收某个玩家出的牌//recv(client_fd[i])////验证该玩家出的牌是否合法//把这张牌所对应的数发送个其他的玩家}return 0;}
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