Support FQDN Resolver

src/common/utils/CMakeLists.txt

@@ -48,6 +48,7 @@ set(CN_UTILS_SRC STATIC
     ${CMAKE_CURRENT_SOURCE_DIR}/string.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/thread_sched.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/mime_parser.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/fqdn.cpp
     )
 
 add_library(CN_UTILS ${CN_UTILS_SRC})
\ No newline at end of file

src/common/utils/fqdn.cpp

+/*
+ * 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) {
+    std::cerr << e.what() << '\n';
+    return false;
+  }
+
+  return false;
+}

src/common/utils/fqdn.hpp

+/*
+ * 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
+ */
+
+/*! \file fqdn.hpp
+ \brief
+ \author
+ \company Eurecom
+ \email:
+ */
+#ifndef FILE_FQDN_HPP_SEEN
+#define FILE_FQDN_HPP_SEEN
+#include <string>
+class fqdn {
+ public:
+  /*
+   * Resolve a DNS name to get host's IP Addr
+   * @param [const std::string &] host_name: host's name/url
+   * @param [const std::string &] protocol: protocol
+   * @param [uint8_t &] addr_type: addr_type (Ipv4/v6)
+   * @return void
+   */
+  static bool resolve(
+      const std::string& host_name, std::string& address, uint32_t& port,
+      uint8_t& addr_type, const std::string& protocol = "http");
+};
+
+#endif /* FILE_FQDN_HPP_SEEN */