aria2/src/NameResolver.cc

/* <!-- 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 "NameResolver.h"

#include <cstring>

#include "DlAbortEx.h"
#include "message.h"
#include "fmt.h"
#include "util.h"
#include "SocketCore.h"
#include "error_code.h"

namespace aria2 {

NameResolver::NameResolver() : socktype_(0), family_(AF_UNSPEC) {}

void NameResolver::resolve(std::vector<std::string>& resolvedAddresses,
                           const std::string& hostname)
{
  struct addrinfo* res;
  int s;
  s = callGetaddrinfo(&res, hostname.c_str(), nullptr, family_, socktype_, 0,
                      0);
  if (s) {
    throw DL_ABORT_EX2(
        fmt(EX_RESOLVE_HOSTNAME, hostname.c_str(), gai_strerror(s)),
        error_code::NAME_RESOLVE_ERROR);
  }
  std::unique_ptr<addrinfo, decltype(&freeaddrinfo)> resDeleter(res,
                                                                freeaddrinfo);
  struct addrinfo* rp;
  for (rp = res; rp; rp = rp->ai_next) {
    auto endpoint = util::getNumericNameInfo(rp->ai_addr, rp->ai_addrlen);
    resolvedAddresses.push_back(endpoint.addr);
  }
}

void NameResolver::setSocktype(int socktype) { socktype_ = socktype; }

} // namespace aria2