Working implementation and example of Ipv4GlobalRoutingOrderedNexthops
diff --git a/model/ipv4-global-routing-ordered-nexthops.h b/model/ipv4-global-routing-ordered-nexthops.h
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+// -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*-
+//
+// Copyright (c) 2008 University of Washington
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License version 2 as
+// published by the Free Software Foundation;
+//
+// This program 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+//
+//
+
+#ifndef IPV4_GLOBAL_ROUTING_ORDERED_NEXTHOPS_H
+#define IPV4_GLOBAL_ROUTING_ORDERED_NEXTHOPS_H
+
+#include "ns3/ipv4-global-routing.h"
+#include "ns3/trie.h"
+#include "ns3/ipv4-routing-table-entry.h"
+#include "ns3/simple-ref-count.h"
+
+#include <boost/multi_index_container.hpp>
+#include <boost/multi_index/tag.hpp>
+#include <boost/multi_index/ordered_index.hpp>
+#include <boost/multi_index/mem_fun.hpp>
+#include <boost/multi_index/random_access_index.hpp>
+#include <boost/multi_index/sequenced_index.hpp>
+
+namespace ns3 {
+
+/**
+ * \brief Global routing protocol for IP version 4 stacks.
+ *
+ * Each prefix entry stores a list of ordered by metric next-hops
+ *
+ * This class deals with Ipv4 unicast routes only.
+ *
+ * \see Ipv4GlobalRouting
+ * \see Ipv4RoutingProtocol
+ * \see GlobalRouteManager
+ */
+class Ipv4GlobalRoutingOrderedNexthops : public Ipv4GlobalRouting
+{
+private:
+ class i_iface {};
+ class i_metric {};
+ class i_index {};
+
+ class EntryContainer
+ : public SimpleRefCount<EntryContainer>
+ , public
+ boost::multi_index::multi_index_container<
+ Ipv4RoutingTableEntry,
+ boost::multi_index::indexed_by<
+ // Access elements by interface
+
+ // boost::multi_index::sequenced<
+ // boost::multi_index::tag<i_metric>
+ // >,
+
+ boost::multi_index::ordered_unique<
+ boost::multi_index::tag<i_iface>,
+ BOOST_MULTI_INDEX_CONST_MEM_FUN (Ipv4RoutingTableEntry,uint32_t,GetInterface)
+ >,
+
+ // Keep entries sorted by metric
+ boost::multi_index::ordered_non_unique<
+ boost::multi_index::tag<i_metric>,
+ BOOST_MULTI_INDEX_CONST_MEM_FUN (Ipv4RoutingTableEntry,uint32_t,GetMetric)
+ >,
+
+ // Access elements by metric order
+ boost::multi_index::random_access<
+ boost::multi_index::tag<i_index>
+ >
+ >
+ >
+ {
+ };
+
+public:
+ static TypeId GetTypeId (void);
+
+ Ipv4GlobalRoutingOrderedNexthops ();
+
+ // These methods inherited from base class
+ // from Ipv4RoutingProtocol
+ virtual Ptr<Ipv4Route> RouteOutput (Ptr<Packet> p, const Ipv4Header &header,
+ Ptr<NetDevice> oif, Socket::SocketErrno &sockerr);
+
+ virtual bool RouteInput (Ptr<const Packet> p, const Ipv4Header &header, Ptr<const NetDevice> idev,
+ UnicastForwardCallback ucb, MulticastForwardCallback mcb,
+ LocalDeliverCallback lcb, ErrorCallback ecb);
+
+ virtual void PrintRoutingTable (Ptr<OutputStreamWrapper> stream) const;
+
+ // from Ipv4GlobalRouting
+ virtual void AddRouteTo (Ipv4Address dest,
+ Ipv4Mask destMask,
+ Ipv4Address nextHop,
+ uint32_t interface,
+ uint32_t metric=0);
+
+ virtual void DeleteRoutes ();
+
+protected:
+ virtual Ptr<Ipv4Route> LookupGlobal (Ipv4Address dest, Ptr<NetDevice> oif = 0);
+
+private:
+ typedef Ipv4AddressTrie<Ptr<EntryContainer> > Ipv4AddressTrieMap;
+ Ipv4AddressTrieMap m_routes;
+};
+
+} // Namespace ns3
+
+#endif /* IPV4_GLOBAL_ROUTING_ORDERED_NEXTHOPS_H */