net: refactor netlink message parsing, add extack support
Change-Id: Iaa132d8cb1aece6cfc608cc1c3b4478982ac706e
diff --git a/src/net/detail/network-monitor-impl-netlink.hpp b/src/net/detail/network-monitor-impl-netlink.hpp
new file mode 100644
index 0000000..a61c546
--- /dev/null
+++ b/src/net/detail/network-monitor-impl-netlink.hpp
@@ -0,0 +1,123 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2013-2018 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.
+ *
+ * @author Davide Pesavento <davide.pesavento@lip6.fr>
+ */
+
+#ifndef NDN_NET_NETWORK_MONITOR_IMPL_NETLINK_HPP
+#define NDN_NET_NETWORK_MONITOR_IMPL_NETLINK_HPP
+
+#include "ndn-cxx-config.hpp"
+#include "../network-monitor.hpp"
+
+#ifndef NDN_CXX_HAVE_RTNETLINK
+#error "This file should not be included ..."
+#endif
+
+#include <boost/asio/posix/stream_descriptor.hpp>
+
+#include <array>
+#include <map>
+
+namespace ndn {
+namespace net {
+
+class NetlinkMessage;
+
+class NetworkMonitorImplNetlink : public NetworkMonitorImpl
+{
+public:
+ using Error = NetworkMonitor::Error;
+
+ /** \brief initialize netlink socket and start enumerating interfaces
+ */
+ explicit
+ NetworkMonitorImplNetlink(boost::asio::io_service& io);
+
+ ~NetworkMonitorImplNetlink();
+
+ uint32_t
+ getCapabilities() const final
+ {
+ return NetworkMonitor::CAP_ENUM |
+ NetworkMonitor::CAP_IF_ADD_REMOVE |
+ NetworkMonitor::CAP_STATE_CHANGE |
+ NetworkMonitor::CAP_MTU_CHANGE |
+ NetworkMonitor::CAP_ADDR_ADD_REMOVE;
+ }
+
+ shared_ptr<const NetworkInterface>
+ getNetworkInterface(const std::string& ifname) const final;
+
+ std::vector<shared_ptr<const NetworkInterface>>
+ listNetworkInterfaces() const final;
+
+private:
+ bool
+ isEnumerating() const;
+
+ void
+ initSocket(int family);
+
+ void
+ joinGroup(int group);
+
+ void
+ sendDumpRequest(uint16_t nlmsgType);
+
+ void
+ asyncRead();
+
+ void
+ handleRead(const boost::system::error_code& error, size_t nBytesReceived,
+ const shared_ptr<boost::asio::posix::stream_descriptor>& socket);
+
+ void
+ parseNetlinkMessage(const NetlinkMessage& nlmsg);
+
+ void
+ parseLinkMessage(const NetlinkMessage& nlmsg);
+
+ void
+ parseAddressMessage(const NetlinkMessage& nlmsg);
+
+ void
+ parseRouteMessage(const NetlinkMessage& nlmsg);
+
+ void
+ parseErrorMessage(const NetlinkMessage& nlmsg);
+
+ static void
+ updateInterfaceState(NetworkInterface& interface, uint8_t operState);
+
+private:
+ std::map<int, shared_ptr<NetworkInterface>> m_interfaces; ///< ifindex => interface
+ std::array<uint8_t, 16384> m_buffer; ///< netlink messages received from the kernel
+ shared_ptr<boost::asio::posix::stream_descriptor> m_socket; ///< the netlink socket
+ uint32_t m_pid; ///< our port ID (unicast address for netlink sockets)
+ uint32_t m_sequenceNo; ///< sequence number of the last netlink request sent to the kernel
+ bool m_isEnumeratingLinks; ///< true if a dump of all links is in progress
+ bool m_isEnumeratingAddresses; ///< true if a dump of all addresses is in progress
+};
+
+} // namespace net
+} // namespace ndn
+
+#endif // NDN_NET_NETWORK_MONITOR_IMPL_NETLINK_HPP