A Discrete-Event Network Simulator
API
aodv-id-cache.cc
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2009 IITP RAS
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  *
18  * Based on
19  * NS-2 AODV model developed by the CMU/MONARCH group and optimized and
20  * tuned by Samir Das and Mahesh Marina, University of Cincinnati;
21  *
22  * AODV-UU implementation by Erik Nordström of Uppsala University
23  * http://core.it.uu.se/core/index.php/AODV-UU
24  *
25  * Authors: Elena Buchatskaia <borovkovaes@iitp.ru>
26  * Pavel Boyko <boyko@iitp.ru>
27  */
28 #include "aodv-id-cache.h"
29 #include <algorithm>
30 
31 namespace ns3 {
32 namespace aodv {
33 bool
34 IdCache::IsDuplicate (Ipv4Address addr, uint32_t id)
35 {
36  Purge ();
37  for (std::vector<UniqueId>::const_iterator i = m_idCache.begin ();
38  i != m_idCache.end (); ++i)
39  {
40  if (i->m_context == addr && i->m_id == id)
41  {
42  return true;
43  }
44  }
45  struct UniqueId uniqueId =
46  {
47  addr, id, m_lifetime + Simulator::Now ()
48  };
49  m_idCache.push_back (uniqueId);
50  return false;
51 }
52 void
54 {
55  m_idCache.erase (remove_if (m_idCache.begin (), m_idCache.end (),
56  IsExpired ()), m_idCache.end ());
57 }
58 
59 uint32_t
61 {
62  Purge ();
63  return m_idCache.size ();
64 }
65 
66 }
67 }
IsExpired structure.
Definition: aodv-id-cache.h:96
void Purge()
Remove all expired entries.
std::vector< UniqueId > m_idCache
Already seen IDs.
Every class exported by the ns3 library is enclosed in the ns3 namespace.
static Time Now(void)
Return the current simulation virtual time.
Definition: simulator.cc:193
Ipv4 addresses are stored in host order in this class.
Definition: ipv4-address.h:41
bool IsDuplicate(Ipv4Address addr, uint32_t id)
Check that entry (addr, id) exists in cache.
Time m_lifetime
Default lifetime for ID records.