mirror of https://github.com/aria2/aria2
118 lines
3.1 KiB
C++
118 lines
3.1 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2006 Tatsuhiro Tsujikawa
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#ifndef _D_NAME_RESOLVER_H_
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#define _D_NAME_RESOLVER_H_
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#include "common.h"
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#include "SharedHandle.h"
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#include <netdb.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <ares.h>
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#ifdef __cplusplus
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} /* end of extern "C" */
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#endif
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void callback(void* arg, int status, struct hostent* host);
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class NameResolver {
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friend void callback(void* arg, int status, struct hostent* host);
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public:
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enum STATUS {
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STATUS_READY,
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STATUS_QUERYING,
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STATUS_SUCCESS,
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STATUS_ERROR,
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};
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private:
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STATUS status;
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ares_channel channel;
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struct in_addr addr;
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string error;
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public:
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NameResolver():
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status(STATUS_READY)
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{
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ares_init(&channel);
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}
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~NameResolver() {
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ares_destroy(channel);
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}
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void resolve(const string& name) {
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status = STATUS_QUERYING;
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ares_gethostbyname(channel, name.c_str(), AF_INET, callback, this);
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}
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string getAddrString() const {
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return inet_ntoa(addr);
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}
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const struct in_addr& getAddr() const {
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return addr;
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}
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const string& getError() const {
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return error;
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}
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STATUS getStatus() const {
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return status;
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}
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int getFds(fd_set* rfdsPtr, fd_set* wfdsPtr) const {
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return ares_fds(channel, rfdsPtr, wfdsPtr);
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}
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void process(fd_set* rfdsPtr, fd_set* wfdsPtr) {
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ares_process(channel, rfdsPtr, wfdsPtr);
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}
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bool operator==(const NameResolver& resolver) {
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return this == &resolver;
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}
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};
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typedef SharedHandle<NameResolver> NameResolverHandle;
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#endif // _D_NAME_RESOLVER_H_
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