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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2006 Tatsuhiro Tsujikawa
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#include "AsyncNameResolver.h"
#include "Util.h"
#include "A2STR.h"
#include <cstring>
namespace aria2 {
#ifdef HAVE_LIBCARES1_5
void callback(void* arg, int status, int timeouts, struct hostent* host)
#else
void callback(void* arg, int status, struct hostent* host)
#endif // HAVE_LIBCARES1_5
{
AsyncNameResolver* resolverPtr = reinterpret_cast<AsyncNameResolver*>(arg);
#ifdef HAVE_LIBARES
// This block is required since the assertion in ares_strerror fails
// if status = ARES_EDESTRUCTION is passed to ares_strerror as 1st argument.
// This does not happen in c-ares.
if(status == ARES_EDESTRUCTION) {
// we simply return in this case.
return;
}
#endif
if(status != ARES_SUCCESS) {
#ifdef HAVE_LIBCARES
resolverPtr->error = ares_strerror(status);
#else
resolverPtr->error = ares_strerror(status, 0);
#endif // HAVE_LIBCARES
resolverPtr->status = AsyncNameResolver::STATUS_ERROR;
return;
}
for(char** ap = host->h_addr_list; *ap; ++ap) {
resolverPtr->_resolvedAddresses.push_back
(inet_ntoa(*reinterpret_cast<struct in_addr*>(*ap)));
}
resolverPtr->status = AsyncNameResolver::STATUS_SUCCESS;
}
AsyncNameResolver::AsyncNameResolver():
status(STATUS_READY)
{
// TODO evaluate return value
ares_init(&channel);
}
AsyncNameResolver::~AsyncNameResolver()
{
ares_destroy(channel);
}
void AsyncNameResolver::resolve(const std::string& name)
{
_hostname = name;
status = STATUS_QUERYING;
ares_gethostbyname(channel, name.c_str(), AF_INET, callback, this);
}
const std::deque<std::string>& AsyncNameResolver::getResolvedAddresses() const
{
return _resolvedAddresses;
}
const std::string& AsyncNameResolver::getError() const
{
return error;
}
AsyncNameResolver::STATUS AsyncNameResolver::getStatus() const
{
return status;
}
int AsyncNameResolver::getFds(fd_set* rfdsPtr, fd_set* wfdsPtr) const
{
return ares_fds(channel, rfdsPtr, wfdsPtr);
}
void AsyncNameResolver::process(fd_set* rfdsPtr, fd_set* wfdsPtr)
{
ares_process(channel, rfdsPtr, wfdsPtr);
}
#ifdef HAVE_LIBCARES
int AsyncNameResolver::getsock(sock_t* sockets) const
{
return ares_getsock(channel, (int *) sockets, ARES_GETSOCK_MAXNUM);
}
void AsyncNameResolver::process(ares_socket_t readfd, ares_socket_t writefd)
{
ares_process_fd(channel, readfd, writefd);
}
#endif // HAVE_LIBCARES
bool AsyncNameResolver::operator==(const AsyncNameResolver& resolver) const
{
return this == &resolver;
}
void AsyncNameResolver::reset()
{
_hostname = A2STR::NIL;
_resolvedAddresses.clear();
status = STATUS_READY;
ares_destroy(channel);
// TODO evaluate return value
ares_init(&channel);
}
const std::string& AsyncNameResolver::getHostname() const
{
return _hostname;
}
} // namespace aria2
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