diff --git a/src/net/network-interface.cpp b/src/net/network-interface.cpp
new file mode 100644
index 0000000..a03d850
--- /dev/null
+++ b/src/net/network-interface.cpp
@@ -0,0 +1,240 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2013-2017 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>
+ */
+
+#include "network-interface.hpp"
+#include "detail/linux-if-constants.hpp"
+#include "../util/logger.hpp"
+#include "../util/string-helper.hpp"
+
+#include <net/if.h>
+
+NDN_LOG_INIT(ndn.NetworkMonitor);
+
+namespace ndn {
+namespace net {
+
+NetworkInterface::NetworkInterface()
+  : m_index(0)
+  , m_type(InterfaceType::UNKNOWN)
+  , m_flags(0)
+  , m_state(InterfaceState::UNKNOWN)
+  , m_mtu(0)
+{
+}
+
+bool
+NetworkInterface::addNetworkAddress(const NetworkAddress& address)
+{
+  if (!address.getIp().is_unspecified()) {
+    // need to erase the existing address before inserting
+    // because the address flags may have changed
+    bool isNew = m_netAddresses.erase(address) == 0;
+    m_netAddresses.insert(address);
+    if (isNew) {
+      NDN_LOG_DEBUG("added address " << address << " to " << m_name);
+      onAddressAdded(address);
+      return true;
+    }
+  }
+  return false;
+}
+
+bool
+NetworkInterface::removeNetworkAddress(const NetworkAddress& address)
+{
+  if (m_netAddresses.erase(address) > 0) {
+    NDN_LOG_DEBUG("removed address " << address << " from " << m_name);
+    onAddressRemoved(address);
+    return true;
+  }
+  return false;
+}
+
+void
+NetworkInterface::setIndex(int index)
+{
+  m_index = index;
+}
+
+void
+NetworkInterface::setName(const std::string& name)
+{
+  BOOST_ASSERT(!name.empty());
+  m_name = name;
+}
+
+void
+NetworkInterface::setType(InterfaceType type)
+{
+  m_type = type;
+}
+
+void
+NetworkInterface::setFlags(uint32_t flags)
+{
+  m_flags = flags;
+}
+
+void
+NetworkInterface::setState(InterfaceState state)
+{
+  if (m_state != state) {
+    std::swap(m_state, state);
+    onStateChanged(state, m_state);
+  }
+}
+
+void
+NetworkInterface::setMtu(uint32_t mtu)
+{
+  if (m_mtu != mtu) {
+    std::swap(m_mtu, mtu);
+    onMtuChanged(mtu, m_mtu);
+  }
+}
+
+void
+NetworkInterface::setEthernetAddress(const ethernet::Address& address)
+{
+  m_etherAddress = address;
+}
+
+void
+NetworkInterface::setEthernetBroadcastAddress(const ethernet::Address& address)
+{
+  m_etherBrdAddress = address;
+}
+
+std::ostream&
+operator<<(std::ostream& os, InterfaceType type)
+{
+  switch (type) {
+    case InterfaceType::UNKNOWN:
+      return os << "unknown";
+    case InterfaceType::LOOPBACK:
+      return os << "loopback";
+    case InterfaceType::ETHERNET:
+      return os << "ether";
+  }
+  return os;
+}
+
+std::ostream&
+operator<<(std::ostream& os, InterfaceState state)
+{
+  switch (state) {
+    case InterfaceState::UNKNOWN:
+      return os << "unknown";
+    case InterfaceState::DOWN:
+      return os << "down";
+    case InterfaceState::NO_CARRIER:
+      return os << "no-carrier";
+    case InterfaceState::DORMANT:
+      return os << "dormant";
+    case InterfaceState::RUNNING:
+      return os << "running";
+  }
+  return os;
+}
+
+static void
+printFlag(std::ostream& os, uint32_t& flags, uint32_t flagVal, const char* flagStr)
+{
+  if (flags & flagVal) {
+    flags &= ~flagVal;
+    os << flagStr << (flags ? "," : "");
+  }
+}
+
+std::ostream&
+operator<<(std::ostream& os, const NetworkInterface& netif)
+{
+  os << netif.getIndex() << ": " << netif.getName() << ": ";
+
+  auto flags = netif.getFlags();
+  os << "<";
+#define PRINT_IFF(flag) printFlag(os, flags, IFF_##flag, #flag)
+  PRINT_IFF(UP);
+  PRINT_IFF(BROADCAST);
+  PRINT_IFF(DEBUG);
+  PRINT_IFF(LOOPBACK);
+  PRINT_IFF(POINTOPOINT);
+#if defined(IFF_NOTRAILERS)
+  PRINT_IFF(NOTRAILERS);
+#endif
+  PRINT_IFF(RUNNING);
+  PRINT_IFF(NOARP);
+  PRINT_IFF(PROMISC);
+  PRINT_IFF(ALLMULTI);
+  PRINT_IFF(MULTICAST);
+#if defined(__linux__)
+  PRINT_IFF(MASTER);
+  PRINT_IFF(SLAVE);
+  PRINT_IFF(PORTSEL);
+  PRINT_IFF(AUTOMEDIA);
+  PRINT_IFF(DYNAMIC);
+#elif defined(__APPLE__) || defined(__FreeBSD__)
+  PRINT_IFF(OACTIVE);
+  PRINT_IFF(SIMPLEX);
+  PRINT_IFF(LINK0);
+  PRINT_IFF(LINK1);
+  PRINT_IFF(LINK2);
+#endif
+#if defined(__FreeBSD__)
+  PRINT_IFF(CANTCONFIG);
+  PRINT_IFF(PPROMISC);
+  PRINT_IFF(MONITOR);
+  PRINT_IFF(STATICARP);
+  PRINT_IFF(DYING);
+  PRINT_IFF(RENAMING);
+#endif
+#undef PRINT_IFF
+#if defined(__linux__)
+#define PRINT_IF_FLAG(flag) printFlag(os, flags, linux_if::FLAG_##flag, #flag)
+  PRINT_IF_FLAG(LOWER_UP);
+  PRINT_IF_FLAG(DORMANT);
+  PRINT_IF_FLAG(ECHO);
+#undef PRINT_IF_FLAG
+#endif
+  if (flags) {
+    // print unknown flags in hex
+    os << AsHex{flags};
+  }
+  os << ">";
+
+  os << " state " << netif.getState() << " mtu " << netif.getMtu() << "\n"
+     << "    link/" << netif.getType() << " " << netif.getEthernetAddress()
+     << " brd " << netif.getEthernetBroadcastAddress() << "\n";
+
+  for (const auto& addr : netif.getNetworkAddresses()) {
+    os << "    " << (addr.getFamily() == AddressFamily::V4 ? "inet " : "inet6 ") << addr;
+    if (netif.canBroadcast() && !addr.getBroadcast().is_unspecified())
+      os << " brd " << addr.getBroadcast();
+    os << " scope " << addr.getScope() << "\n";
+  }
+
+  return os;
+}
+
+} // namespace net
+} // namespace ndn