#ifndef DNS_SOCKET_HANDLER_HPP # define DNS_SOCKET_HANDLER_HPP #include <louloulibs.h> #ifdef CARES_FOUND #include <network/socket_handler.hpp> #include <ares.h> /** * Manage a socket returned by ares_fds. We do not create, open or close the * socket ourself: this is done by c-ares. We just call ares_process_fd() * with the correct parameters, depending on what can be done on that socket * (Poller reported it to be writable or readeable) */ class DNSSocketHandler: public SocketHandler { public: explicit DNSSocketHandler(std::shared_ptr<Poller> poller, const socket_t socket); ~DNSSocketHandler(); /** * Just call dns_process_fd, c-ares will do its work of send()ing or * recv()ing the data it wants on that socket. */ void on_recv() override final; void on_send() override final; /** * Do nothing, because we are always considered to be connected, since the * connection is done by c-ares and not by us. */ void connect() override final; /** * Always true, see the comment for connect() */ bool is_connected() const override final; private: DNSSocketHandler(const DNSSocketHandler&) = delete; DNSSocketHandler(DNSSocketHandler&&) = delete; DNSSocketHandler& operator=(const DNSSocketHandler&) = delete; DNSSocketHandler& operator=(DNSSocketHandler&&) = delete; }; #endif // CARES_FOUND #endif // DNS_SOCKET_HANDLER_HPP