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Ilya Moiseenko4e473482011-10-31 17:58:14 -07001/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
2/*
3 * Copyright (c) 2011 University of California, Los Angeles
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation;
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 *
Alexander Afanasyev6315ef72012-06-01 20:56:31 -070018 * Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
19 * Ilya Moiseenko <iliamo@cs.ucla.edu>
Ilya Moiseenko4e473482011-10-31 17:58:14 -070020 */
21
Alexander Afanasyev996b4872012-07-17 17:07:56 -070022#include "best-route.h"
Alexander Afanasyevf377b332011-12-16 15:32:12 -080023
Alexander Afanasyev4aac5572012-08-09 10:49:55 -070024#include "ns3/ndn-interest-header.h"
25#include "ns3/ndn-pit.h"
26#include "ns3/ndn-pit-entry.h"
Alexander Afanasyeva5bbe0e2011-11-22 17:28:39 -080027
Ilya Moiseenko4e473482011-10-31 17:58:14 -070028#include "ns3/assert.h"
Alexander Afanasyeva5bbe0e2011-11-22 17:28:39 -080029#include "ns3/log.h"
Ilya Moiseenko4e473482011-10-31 17:58:14 -070030
Alexander Afanasyev11f7bb42012-07-09 17:06:30 -070031#include <boost/foreach.hpp>
Alexander Afanasyev19426ef2011-11-23 20:55:28 -080032#include <boost/lambda/lambda.hpp>
33#include <boost/lambda/bind.hpp>
34namespace ll = boost::lambda;
35
Alexander Afanasyev2b4c9472012-08-09 15:00:38 -070036NS_LOG_COMPONENT_DEFINE ("ndn.fw.BestRoute");
Ilya Moiseenko4e473482011-10-31 17:58:14 -070037
Alexander Afanasyev996b4872012-07-17 17:07:56 -070038namespace ns3 {
Alexander Afanasyev2b4c9472012-08-09 15:00:38 -070039namespace ndn {
40namespace fw {
Alexander Afanasyev0a61c342011-12-06 12:48:55 -080041
Alexander Afanasyev996b4872012-07-17 17:07:56 -070042NS_OBJECT_ENSURE_REGISTERED (BestRoute);
Ilya Moiseenko4e473482011-10-31 17:58:14 -070043
Alexander Afanasyev996b4872012-07-17 17:07:56 -070044TypeId
45BestRoute::GetTypeId (void)
Ilya Moiseenko4e473482011-10-31 17:58:14 -070046{
Alexander Afanasyev2b4c9472012-08-09 15:00:38 -070047 static TypeId tid = TypeId ("ns3::ndn::fw::BestRoute")
Alexander Afanasyev4aac5572012-08-09 10:49:55 -070048 .SetGroupName ("Ndn")
Alexander Afanasyev996b4872012-07-17 17:07:56 -070049 .SetParent <GreenYellowRed> ()
50 .AddConstructor <BestRoute> ()
Alexander Afanasyev11453142011-11-25 16:13:33 -080051 ;
Ilya Moiseenko4e473482011-10-31 17:58:14 -070052 return tid;
53}
54
Alexander Afanasyev996b4872012-07-17 17:07:56 -070055BestRoute::BestRoute ()
Ilya Moiseenko4e473482011-10-31 17:58:14 -070056{
57}
58
Ilya Moiseenko4e473482011-10-31 17:58:14 -070059bool
Alexander Afanasyev2b4c9472012-08-09 15:00:38 -070060BestRoute::DoPropagateInterest (const Ptr<Face> &incomingFace,
61 Ptr<InterestHeader> header,
Alexander Afanasyev996b4872012-07-17 17:07:56 -070062 const Ptr<const Packet> &packet,
Alexander Afanasyev2b4c9472012-08-09 15:00:38 -070063 Ptr<pit::Entry> pitEntry)
Ilya Moiseenko4e473482011-10-31 17:58:14 -070064{
Alexander Afanasyeva5bbe0e2011-11-22 17:28:39 -080065 NS_LOG_FUNCTION (this);
Alexander Afanasyeva5bbe0e2011-11-22 17:28:39 -080066
Ilya Moiseenko1a8be032012-01-18 12:51:09 -080067
Alexander Afanasyev0a61c342011-12-06 12:48:55 -080068 // Try to work out with just green faces
Alexander Afanasyev996b4872012-07-17 17:07:56 -070069 bool greenOk = super::DoPropagateInterest (incomingFace, header, packet, pitEntry);
Alexander Afanasyev0a61c342011-12-06 12:48:55 -080070 if (greenOk)
71 return true;
72
73 int propagatedCount = 0;
Alexander Afanasyev2b4c9472012-08-09 15:00:38 -070074 BOOST_FOREACH (const fib::FaceMetric &metricFace, pitEntry->GetFibEntry ()->m_faces.get<fib::i_metric> ())
Ilya Moiseenko4e473482011-10-31 17:58:14 -070075 {
Alexander Afanasyev2b4c9472012-08-09 15:00:38 -070076 if (metricFace.m_status == fib::FaceMetric::NDN_FIB_RED) // all non-read faces are in front
Alexander Afanasyev0a61c342011-12-06 12:48:55 -080077 break;
78
79 if (metricFace.m_face == incomingFace)
80 continue; // same face as incoming, don't forward
81
Alexander Afanasyev36b45772012-07-10 16:57:42 -070082 if (pitEntry->GetIncoming ().find (metricFace.m_face) != pitEntry->GetIncoming ().end ())
Alexander Afanasyev0a61c342011-12-06 12:48:55 -080083 continue; // don't forward to face that we received interest from
84
Alexander Afanasyevf249a192012-07-18 16:52:51 -070085 if (!WillSendOutInterest (metricFace.m_face, header, pitEntry))
Alexander Afanasyev0a61c342011-12-06 12:48:55 -080086 {
87 continue;
88 }
89
Ilya Moiseenko1a8be032012-01-18 12:51:09 -080090 //transmission
Alexander Afanasyevf249a192012-07-18 16:52:51 -070091 Ptr<Packet> packetToSend = packet->Copy ();
Alexander Afanasyeve9c9d722012-01-19 16:59:30 -080092 metricFace.m_face->Send (packetToSend);
Alexander Afanasyevf249a192012-07-18 16:52:51 -070093
Alexander Afanasyev1c0248b2012-07-24 15:59:50 -070094 DidSendOutInterest (metricFace.m_face, header, packet, pitEntry);
Alexander Afanasyevf249a192012-07-18 16:52:51 -070095
Alexander Afanasyev0a61c342011-12-06 12:48:55 -080096 propagatedCount++;
97 break; // do only once
Ilya Moiseenko4e473482011-10-31 17:58:14 -070098 }
Alexander Afanasyeva5bbe0e2011-11-22 17:28:39 -080099
Alexander Afanasyev0a61c342011-12-06 12:48:55 -0800100 NS_LOG_INFO ("Propagated to " << propagatedCount << " faces");
101 return propagatedCount > 0;
Ilya Moiseenko4e473482011-10-31 17:58:14 -0700102}
Alexander Afanasyev996b4872012-07-17 17:07:56 -0700103
Alexander Afanasyev2b4c9472012-08-09 15:00:38 -0700104} // namespace fw
105} // namespace ndn
Alexander Afanasyev996b4872012-07-17 17:07:56 -0700106} // namespace ns3