国内哪家网站做的系统纯净,263企业邮箱自动回复,吉林营销网站建设开发,高安做网站epoll默认情况下是水平触发模式#xff0c;这次将epoll设置为边缘触发模式来实现服务器#xff0c;而客户端直接使用完美回声服务器的客户端。服务器代码#include #include #include #include #include #include #include #include #include const int BUF_SIZE 4;const int…epoll默认情况下是水平触发模式这次将epoll设置为边缘触发模式来实现服务器而客户端直接使用完美回声服务器的客户端。服务器代码#include #include #include #include #include #include #include #include #include const int BUF_SIZE 4;const int EPOLL_SIZE 50;void setnonblockingmode(int fd);void error_handling(const char *buf);int main(int argc, char *argv[]) {int server_sock, client_sock;sockaddr_in server_addr, client_addr;socklen_t addr_size;ssize_t str_len;int i;char buf[BUF_SIZE];epoll_event *ep_events;epoll_event event;int epfd, event_cnt;if (argc ! 2) {printf(Usage : %s \n, argv[0]);exit(1);}server_sock socket(PF_INET, SOCK_STREAM, 0);memset(server_addr, 0, sizeof(server_addr));server_addr.sin_family AF_INET;server_addr.sin_addr.s_addr htonl(INADDR_ANY);server_addr.sin_port htons(atoi(argv[1]));if (bind(server_sock, (sockaddr*)server_addr, sizeof(server_addr)) -1) {error_handling(bind() error);exit(1);}if (listen(server_sock, 5) -1) {error_handling(listen() error);}epfd epoll_create(EPOLL_SIZE);ep_events (epoll_event*)malloc(sizeof(epoll_event) * EPOLL_SIZE);event.events EPOLLIN;event.data.fd server_sock;epoll_ctl(epfd, EPOLL_CTL_ADD, server_sock, event);while (1) {event_cnt epoll_wait(epfd, ep_events, EPOLL_SIZE, -1);if (event_cnt -1) {puts(epoll_wait() error);break;}for (int i 0; i event_cnt; i) {if (ep_events[i].data.fd server_sock) {addr_size sizeof(client_addr);client_sock accept(server_sock, (sockaddr*)client_addr, addr_size);setnonblockingmode(client_sock); // 设置client socket为非阻塞模式event.events EPOLLIN | EPOLLET; // 设置epoll边缘触发event.data.fd client_sock;epoll_ctl(epfd, EPOLL_CTL_ADD, client_sock, event);printf(connect client: %d\n, client_sock);} else {while (1) { // 将数据读完为止str_len read(ep_events[i].data.fd, buf, BUF_SIZE);if (str_len 0) {epoll_ctl(epfd, EPOLL_CTL_DEL, ep_events[i].data.fd, NULL);close(ep_events[i].data.fd);printf(closed client: %d\n, ep_events[i].data.fd);} else if (str_len 0) {if (errno EAGAIN) { // 已无数据break;}}else {write(ep_events[i].data.fd, buf,str_len);}}}}}close(server_sock);close(epfd);return 0;}// 将文件描述符设置为非阻塞void setnonblockingmode(int fd) {int flag fcntl(fd, F_GETFL, 0);fcntl(fd, F_SETFL, flag | O_NONBLOCK);}项目代码参考
