fqdn.cpp 2.25 KB
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/*
 * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under
 * the OAI Public License, Version 1.1  (the "License"); you may not use this
 * file except in compliance with the License. You may obtain a copy of the
 * License at
 *
 *      http://www.openairinterface.org/?page_id=698
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *-------------------------------------------------------------------------------
 * For more information about the OpenAirInterface (OAI) Software Alliance:
 *      contact@openairinterface.org
 */

#include "fqdn.hpp"
#include "logger.hpp"
#include <boost/asio.hpp>
#include <iostream>

bool fqdn::resolve(
    const std::string& host_name, std::string& address, uint32_t& port,
    uint8_t& addr_type, const std::string& protocol) {
  try {
    boost::asio::io_context io_context = {};

    boost::asio::ip::tcp::resolver resolver{io_context};
    boost::asio::ip::tcp::resolver::results_type endpoints =
        resolver.resolve(host_name, protocol);

    addr_type = 0;  // IPv4 by default
    for (auto it = endpoints.cbegin(); it != endpoints.cend(); it++) {
      // get the first Endpoint
      boost::asio::ip::tcp::endpoint endpoint = *it;
      address                                 = endpoint.address().to_string();
      port                                    = endpoint.port();
      Logger::smf_app().debug(
          "Resolve a DNS (name %s, protocol %s): Ip Addr %s, port %u",
          host_name.c_str(), protocol.c_str(), address.c_str(), port);
      if (endpoint.address().is_v4())
        addr_type = 0;
      else
        addr_type = 1;
      return true;
    }
  } catch (std::exception& e) {
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    throw std::runtime_error(
        "Cannot resolve a DNS name " + std::string(e.what()));
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    return false;
  }

  return false;
}