A Discrete-Event Network Simulator
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dsr-rsendbuff.h
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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2011 Yufei Cheng
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Yufei Cheng <yfcheng@ittc.ku.edu>
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*
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* James P.G. Sterbenz <jpgs@ittc.ku.edu>, director
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* ResiliNets Research Group http://wiki.ittc.ku.edu/resilinets
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* Information and Telecommunication Technology Center (ITTC)
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* and Department of Electrical Engineering and Computer Science
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* The University of Kansas Lawrence, KS USA.
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*
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* Work supported in part by NSF FIND (Future Internet Design) Program
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* under grant CNS-0626918 (Postmodern Internet Architecture),
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* NSF grant CNS-1050226 (Multilayer Network Resilience Analysis and Experimentation on GENI),
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* US Department of Defense (DoD), and ITTC at The University of Kansas.
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*/
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#ifndef DSR_SENDBUFF_H
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#define DSR_SENDBUFF_H
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#include <vector>
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#include "ns3/ipv4-routing-protocol.h"
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#include "ns3/simulator.h"
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namespace
ns3 {
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namespace
dsr {
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class
SendBuffEntry
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{
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public
:
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// / c-tor
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SendBuffEntry
(
Ptr<const Packet>
pa = 0,
Ipv4Address
d =
Ipv4Address
(),
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Time
exp =
Simulator::Now
(), uint8_t p = 0)
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: m_packet (pa),
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m_dst (d),
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m_expire (exp +
Simulator::Now
()),
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m_protocol (p)
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{
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}
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bool
operator==
(
SendBuffEntry
const
& o)
const
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{
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return
((m_packet == o.m_packet) && (m_dst == o.m_dst) && (m_expire == o.m_expire));
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}
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// /\name Fields
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// \{
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Ptr<const Packet>
GetPacket ()
const
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{
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return
m_packet;
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}
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void
SetPacket (
Ptr<const Packet>
p)
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{
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m_packet = p;
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}
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Ipv4Address GetDestination ()
const
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{
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return
m_dst;
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}
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void
SetDestination (Ipv4Address d)
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{
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m_dst = d;
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}
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void
SetExpireTime (Time exp)
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{
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m_expire = exp +
Simulator::Now
();
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}
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Time GetExpireTime ()
const
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{
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return
m_expire -
Simulator::Now
();
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}
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void
SetProtocol (uint8_t p)
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{
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m_protocol = p;
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}
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uint8_t GetProtocol ()
const
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{
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return
m_protocol;
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}
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// \}
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private
:
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// / Data packet
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Ptr<const Packet> m_packet;
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// / Destination address
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Ipv4Address m_dst;
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// / Expire time for queue entry
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Time m_expire;
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// / The protocol number
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uint8_t m_protocol;
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};
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/************************************************************************************************************************/
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class
SendBuffer
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{
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public
:
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// / Default c-tor
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SendBuffer
()
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{
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}
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// / Push entry in queue, if there is no entry with the same packet and destination address in queue.
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bool
Enqueue (
SendBuffEntry
& entry);
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// / Return first found (the earliest) entry for given destination
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bool
Dequeue (
Ipv4Address
dst,
SendBuffEntry
& entry);
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// / Remove all packets with destination IP address dst
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void
DropPacketWithDst (
Ipv4Address
dst);
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// / Finds whether a packet with destination dst exists in the queue
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bool
Find (
Ipv4Address
dst);
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// / Number of entries
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uint32_t GetSize ();
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// /\name Fields
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// \{
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uint32_t GetMaxQueueLen ()
const
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{
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return
m_maxLen
;
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}
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void
SetMaxQueueLen (uint32_t len)
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{
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m_maxLen
= len;
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}
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Time
GetSendBufferTimeout ()
const
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{
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return
m_sendBufferTimeout
;
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}
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void
SetSendBufferTimeout (
Time
t)
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{
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m_sendBufferTimeout
= t;
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}
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// \}
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std::vector<SendBuffEntry> & GetBuffer ()
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{
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return
m_sendBuffer
;
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}
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private
:
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std::vector<SendBuffEntry>
m_sendBuffer
;
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void
Purge
();
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void
Drop
(
SendBuffEntry
en, std::string reason);
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uint32_t
m_maxLen
;
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Time
m_sendBufferTimeout
;
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static
bool
IsEqual
(
SendBuffEntry
en,
const
Ipv4Address
dst)
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{
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return
(en.GetDestination () == dst);
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}
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};
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/*******************************************************************************************************************************/
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}
// namespace dsr
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}
// namespace ns3
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#endif
/* DSR_SENDBUFF_H */
ns3::dsr::SendBuffer::m_sendBufferTimeout
Time m_sendBufferTimeout
The maximum period of time that a routing protocol is allowed to buffer a packet for, seconds.
Definition:
dsr-rsendbuff.h:164
ns3::dsr::SendBuffer::Drop
void Drop(SendBuffEntry en, std::string reason)
Notify that packet is dropped from queue by timeout.
Definition:
dsr-rsendbuff.cc:172
ns3::Time
keep track of time unit.
Definition:
nstime.h:149
ns3::Ptr< const Packet >
ns3::dsr::SendBuffer::Purge
void Purge()
Remove all expired entries.
Definition:
dsr-rsendbuff.cc:151
ns3::dsr::SendBuffEntry::operator==
bool operator==(SendBuffEntry const &o) const
Definition:
dsr-rsendbuff.h:61
ns3::dsr::SendBuffEntry
DSR Send Buffer Entry.
Definition:
dsr-rsendbuff.h:45
ns3::Simulator::Now
static Time Now(void)
Definition:
simulator.cc:179
ns3::Ipv4Address
Ipv4 addresses are stored in host order in this class.
Definition:
ipv4-address.h:38
ns3::dsr::SendBuffer
DSR send buffer.
Definition:
dsr-rsendbuff.h:116
ns3::dsr::SendBuffer::m_maxLen
uint32_t m_maxLen
The maximum number of packets that we allow a routing protocol to buffer.
Definition:
dsr-rsendbuff.h:163
ns3::dsr::SendBuffer::m_sendBuffer
std::vector< SendBuffEntry > m_sendBuffer
The send buffer to cache unsent packet.
Definition:
dsr-rsendbuff.h:160
ns3::dsr::SendBuffer::IsEqual
static bool IsEqual(SendBuffEntry en, const Ipv4Address dst)
Definition:
dsr-rsendbuff.h:165
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dsr-rsendbuff.h
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