routealgo.cc
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- /*
- * routealgo.cc
- * Copyright (C) 2000 by the University of Southern California
- * $Id: routealgo.cc,v 1.5 2005/08/25 18:58:11 johnh Exp $
- *
- * 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.
- *
- *
- * The copyright of this module includes the following
- * linking-with-specific-other-licenses addition:
- *
- * In addition, as a special exception, the copyright holders of
- * this module give you permission to combine (via static or
- * dynamic linking) this module with free software programs or
- * libraries that are released under the GNU LGPL and with code
- * included in the standard release of ns-2 under the Apache 2.0
- * license or under otherwise-compatible licenses with advertising
- * requirements (or modified versions of such code, with unchanged
- * license). You may copy and distribute such a system following the
- * terms of the GNU GPL for this module and the licenses of the
- * other code concerned, provided that you include the source code of
- * that other code when and as the GNU GPL requires distribution of
- * source code.
- *
- * Note that people who make modified versions of this module
- * are not obligated to grant this special exception for their
- * modified versions; it is their choice whether to do so. The GNU
- * General Public License gives permission to release a modified
- * version without this exception; this exception also makes it
- * possible to release a modified version which carries forward this
- * exception.
- *
- */
- /*
- * Generic helpers (all routing algorithms)
- * contributed to ns
- * George Riley, Georgia Tech, Winter 2000
- */
- #include "config.h"
- #ifdef HAVE_STL
- #include <stdio.h>
- #include "routealgo/rnode.h"
- // Forward declarations
- static void PrintPred(nodeid_t, nodeid_t, RoutingVec_t&);
- static void NixPred(nodeid_t, nodeid_t, RoutingVec_t&, RNodeVec_t&, NixVec&);
- // Globally visible routines
- void PrintRoute( nodeid_t s, nodeid_t d, RoutingVec_t& pred)
- { // Print the route, given source s, destination d and predecessor vector pred
- printf("Route to node %ld is : ", d);
- PrintPred(s, d, pred);
- printf("n");
- }
- // Create the NixVector
- void NixRoute( nodeid_t s, nodeid_t d, RoutingVec_t& pred,
- RNodeVec_t& nodes, NixVec& nv)
- {
- NixPred(s, d, pred, nodes, nv);
- }
- // Print the parent list (debug)
- void PrintParents(RoutingVec_t& pred)
- {
- printf("Parent vector is");
- for (RoutingVec_it i = pred.begin(); i != pred.end(); i++)
- {
- printf(" %ld", *i);
- }
- printf("n");
- }
- // Print the route from the nixvector (debug)
- void PrintNix(nodeid_t s, RNodeVec_t nodes, NixVec& nv)
- {
- printf("Printing Nv from %ldn", s);
- while(1)
- {
- printf("%ldn", s);
- fflush(stdout);
- if (!nodes[s])
- {
- printf("PrintNix Error, no node for %ldn", s);
- break;
- }
- printf("Node %ld nixl %ldn", s, nodes[s]->GetNixl());
- Nix_t n = nv.Extract(nodes[s]->GetNixl());
- if (n == NIX_NONE) break; // Done
- nodeid_t s1 = nodes[s]->GetNeighbor(n);
- if (s1 == NODE_NONE)
- {
- printf("Huh? Node %ld can't get neighbor %ldn", s, n);
- break;
- }
- s = s1;
- }
- printf("n");
- nv.Reset();
- }
- // helpers
- static void PrintPred(nodeid_t s, nodeid_t p, RoutingVec_t& pred)
- {
- if (s == p)
- {
- printf(" %ld", s);
- }
- else
- {
- if (pred[p] == NODE_NONE)
- {
- printf(" No path..");
- }
- else
- {
- PrintPred(s, pred[p], pred);
- printf(" %ld", p);
- }
- }
- }
- static void NixPred(nodeid_t s, nodeid_t p, RoutingVec_t& pred,
- RNodeVec_t& nodes, NixVec& nv)
- {
- if (s == p)
- {
- return; // Got there
- }
- else
- {
- if (pred[p] == NODE_NONE)
- {
- if(0)printf(" No path..");
- return;
- }
- else
- {
- NixPred(s, pred[p], pred, nodes, nv);
- NixPair_t n = nodes[pred[p]]->GetNix(p);
- if (n.first == NIX_NONE)
- { // ! Error.
- printf("RouteAlgo::GetNix returned NIX_NONE!n");
- exit(1);
- }
- if(0)printf("NVAdding ind %ld lth %ldn", n.first, n.second);
- nv.Add(n);
- }
- }
- }
- #endif /* STL */