global-route-manager.h

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/*
 * Copyright 2007 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
 *
 * Authors:  Craig Dowell (craigdo@ee.washington.edu)
 *           Tom Henderson (tomhend@u.washington.edu)
 */
 
#ifndef GLOBAL_ROUTE_MANAGER_H
#define GLOBAL_ROUTE_MANAGER_H
 
#include <cstdint>
 
namespace ns3
{
 
/**
 * \ingroup globalrouting
 *
 * @brief A global global router
 *
 * This singleton object can query interface each node in the system
 * for a GlobalRouter interface.  For those nodes, it fetches one or
 * more Link State Advertisements and stores them in a local database.
 * Then, it can compute shortest paths on a per-node basis to all routers,
 * and finally configure each of the node's forwarding tables.
 *
 * The design is guided by OSPFv2 \RFC{2328} section 16.1.1 and quagga ospfd.
 */
class GlobalRouteManager
{
  public:
    // Delete copy constructor and assignment operator to avoid misuse
    GlobalRouteManager(const GlobalRouteManager&) = delete;
    GlobalRouteManager& operator=(const GlobalRouteManager&) = delete;
 
    /**
     * @brief Allocate a 32-bit router ID from monotonically increasing counter.
     * @returns A new new RouterId.
     */
    static uint32_t AllocateRouterId();
 
    /**
     * @brief Delete all static routes on all nodes that have a
     * GlobalRouterInterface
     *
     */
    static void DeleteGlobalRoutes();
 
    /**
     * @brief Build the routing database by gathering Link State Advertisements
     * from each node exporting a GlobalRouter interface.
     */
    static void BuildGlobalRoutingDatabase();
 
    /**
     * @brief Compute routes using a Dijkstra SPF computation and populate
     * per-node forwarding tables
     */
    static void InitializeRoutes();
};
 
} // namespace ns3
 
#endif /* GLOBAL_ROUTE_MANAGER_H */