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/* -*- 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_NETLINK_SOCKET_HPP
#define NDN_NET_NETLINK_SOCKET_HPP
#include "ndn-cxx/net/network-monitor.hpp"
#include "ndn-cxx/util/signal/signal.hpp"
#include <boost/asio/posix/stream_descriptor.hpp>
#include <map>
#include <vector>
#ifndef NDN_CXX_HAVE_NETLINK
#error "This file should not be included ..."
#endif
namespace ndn {
namespace net {
class NetlinkMessage;
class NetlinkSocket : noncopyable
{
public:
using Error = NetworkMonitor::Error;
using MessageCallback = std::function<void(const NetlinkMessage&)>;
void
joinGroup(int group);
void
registerNotificationCallback(MessageCallback cb);
protected:
explicit
NetlinkSocket(boost::asio::io_service& io);
~NetlinkSocket();
void
open(int protocol);
void
registerRequestCallback(uint32_t seq, MessageCallback cb);
virtual std::string
nlmsgTypeToString(uint16_t type) const;
private:
void
asyncWait();
void
receiveAndValidate();
protected:
shared_ptr<boost::asio::posix::stream_descriptor> m_sock; ///< netlink socket descriptor
uint32_t m_pid; ///< port ID of this socket
uint32_t m_seqNum; ///< sequence number of the last netlink request sent to the kernel
private:
std::vector<uint8_t> m_buffer; ///< buffer for netlink messages from the kernel
std::map<uint32_t, MessageCallback> m_pendingRequests; ///< request sequence number => callback
};
class RtnlSocket final : public NetlinkSocket
{
public:
explicit
RtnlSocket(boost::asio::io_service& io);
void
open();
void
sendDumpRequest(uint16_t nlmsgType, MessageCallback cb);
protected:
std::string
nlmsgTypeToString(uint16_t type) const final;
};
class GenlSocket;
class GenlFamilyResolver : noncopyable
{
public:
GenlFamilyResolver(std::string familyName, GenlSocket& socket);
util::Signal<GenlFamilyResolver, uint16_t> onResolved;
util::Signal<GenlFamilyResolver> onError;
private:
void
asyncResolve();
void
handleResolve(const NetlinkMessage& nlmsg);
private:
GenlSocket& m_sock;
std::string m_family;
};
class GenlSocket final : public NetlinkSocket
{
public:
explicit
GenlSocket(boost::asio::io_service& io);
void
open();
void
sendRequest(const std::string& familyName, uint8_t command,
const void* payload, size_t payloadLen,
MessageCallback messageCb, std::function<void()> errorCb);
void
sendRequest(uint16_t familyId, uint8_t command,
const void* payload, size_t payloadLen,
MessageCallback messageCb);
protected:
std::string
nlmsgTypeToString(uint16_t type) const final;
private:
std::map<std::string, uint16_t> m_cachedFamilyIds; ///< family name => family id
std::map<std::string, GenlFamilyResolver> m_familyResolvers; ///< family name => resolver instance
};
} // namespace net
} // namespace ndn
#endif // NDN_NET_NETLINK_SOCKET_HPP