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/* -*- 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>
*/
#ifndef NDN_NET_NETWORK_MONITOR_IMPL_RTNL_HPP
#define NDN_NET_NETWORK_MONITOR_IMPL_RTNL_HPP
#include "ndn-cxx-config.hpp"
#include "../network-monitor.hpp"
#ifndef NDN_CXX_HAVE_RTNETLINK
#error "This file should not be compiled ..."
#endif
#include <boost/asio/posix/stream_descriptor.hpp>
#include <array>
#include <map>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/if_addr.h>
#include <linux/if_link.h>
namespace ndn {
namespace net {
class NetworkMonitorImplRtnl : public NetworkMonitorImpl
{
public:
using Error = NetworkMonitor::Error;
/** \brief initialize netlink socket and start enumerating interfaces
*/
explicit
NetworkMonitorImplRtnl(boost::asio::io_service& io);
~NetworkMonitorImplRtnl();
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:
struct RtnlRequest
{
nlmsghdr nlh;
ifinfomsg ifi;
rtattr rta __attribute__((aligned(NLMSG_ALIGNTO))); // rtattr has to be aligned
uint32_t rtext; // space for IFLA_EXT_MASK
};
bool
isEnumerating() const;
void
initSocket();
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 nlmsghdr* nlh, size_t len);
void
parseLinkMessage(const nlmsghdr* nlh, const ifinfomsg* ifi);
void
parseAddressMessage(const nlmsghdr* nlh, const ifaddrmsg* ifa);
void
parseRouteMessage(const nlmsghdr* nlh, const rtmsg* rtm);
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_RTNL_HPP