util: Use default resolver behavior in util::dns::Resolver
As of this commit, we are using the default behavior of
boost::asio::ip::resolver (only return IPv4 addresses if a non-loopback
IPv4 address is configured for the system; only return IPv6 addresses if
a non-loopback IPv6 address is configured for the system).
Unit tests are now conditioned upon availability of IPv4/IPv6 and will
not fail if IPv4 or IPv6 addresses cannot be resolved.
Change-Id: I8d7fa9a205ad26a2ca85fd22d582ffe6b0a02a92
Refs: #2415
diff --git a/tests/unit-tests/network-configuration-detector.cpp b/tests/unit-tests/network-configuration-detector.cpp
new file mode 100644
index 0000000..f00b3e8
--- /dev/null
+++ b/tests/unit-tests/network-configuration-detector.cpp
@@ -0,0 +1,87 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2013-2015 Regents of the University of California.
+ *
+ * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
+ *
+ * ndn-cxx library is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * ndn-cxx library 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 Lesser General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License and GNU Lesser
+ * General Public License along with ndn-cxx, e.g., in COPYING.md file. If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
+ */
+
+#include "network-configuration-detector.hpp"
+
+#include <boost/asio/ip/address.hpp>
+#include <boost/asio/ip/udp.hpp>
+#include <boost/asio/ip/basic_resolver.hpp>
+#include <boost/asio/io_service.hpp>
+#include <boost/range/iterator_range_core.hpp>
+
+namespace ndn {
+namespace tests {
+
+bool NetworkConfigurationDetector::m_isInitialized = false;
+bool NetworkConfigurationDetector::m_hasIpv4 = false;
+bool NetworkConfigurationDetector::m_hasIpv6 = false;
+
+bool
+NetworkConfigurationDetector::hasIpv4()
+{
+ if (!m_isInitialized) {
+ detect();
+ }
+ return m_hasIpv4;
+}
+
+bool
+NetworkConfigurationDetector::hasIpv6()
+{
+ if (!m_isInitialized) {
+ detect();
+ }
+ return m_hasIpv6;
+}
+
+void
+NetworkConfigurationDetector::detect()
+{
+ typedef boost::asio::ip::basic_resolver<boost::asio::ip::udp> BoostResolver;
+
+ boost::asio::io_service ioService;
+ BoostResolver resolver(ioService);
+
+ // The specified hostname must contain both A and AAAA records
+ BoostResolver::query query("a.root-servers.net", "");
+
+ boost::system::error_code errorCode;
+ BoostResolver::iterator begin = resolver.resolve(query, errorCode);
+ if (errorCode) {
+ m_isInitialized = true;
+ return;
+ }
+ BoostResolver::iterator end;
+
+ for (const auto& i : boost::make_iterator_range(begin, end)) {
+ if (i.endpoint().address().is_v4()) {
+ m_hasIpv4 = true;
+ }
+ else if (i.endpoint().address().is_v6()) {
+ m_hasIpv6 = true;
+ }
+ }
+
+ m_isInitialized = true;
+}
+
+} // namespace tests
+} // namespace ndn