A Discrete-Event Network Simulator
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ipcs-classifier.cc
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2009 INRIA, UDcast
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  * Mohamed Amine Ismail <amine.ismail@sophia.inria.fr>
19  *
20  */
21 
22 #include "ipcs-classifier.h"
23 #include <stdint.h>
24 #include "ns3/log.h"
25 #include "service-flow.h"
26 #include "ns3/packet.h"
27 #include "ns3/ipv4-header.h"
28 #include "ns3/udp-header.h"
29 #include "ns3/tcp-header.h"
30 #include "ns3/llc-snap-header.h"
31 #include "ns3/udp-l4-protocol.h"
32 #include "ns3/tcp-l4-protocol.h"
33 
34 NS_LOG_COMPONENT_DEFINE ("IpcsClassifier");
35 
36 namespace ns3 {
37 
38 NS_OBJECT_ENSURE_REGISTERED (IpcsClassifier);
39 
40 TypeId IpcsClassifier::GetTypeId (void)
41 {
42  static TypeId tid = TypeId ("ns3::IpcsClassifier")
43  .SetParent<Object> ();
44  return tid;
45 }
46 
47 IpcsClassifier::IpcsClassifier (void)
48 {
49 }
50 
51 IpcsClassifier::~IpcsClassifier (void)
52 {
53 }
54 
55 ServiceFlow *
56 IpcsClassifier::Classify (Ptr<const Packet> packet,
57  Ptr<ServiceFlowManager> sfm, ServiceFlow::Direction dir)
58 {
59  Ptr<Packet> C_Packet = packet->Copy ();
60 
61  LlcSnapHeader llc;
62  C_Packet->RemoveHeader (llc);
63 
64  Ipv4Header ipv4Header;
65  C_Packet->RemoveHeader (ipv4Header);
66  Ipv4Address source_address = ipv4Header.GetSource ();
67  Ipv4Address dest_address = ipv4Header.GetDestination ();
68  uint8_t protocol = ipv4Header.GetProtocol ();
69 
70  uint16_t sourcePort = 0;
71  uint16_t destPort = 0;
72  if (protocol == UdpL4Protocol::PROT_NUMBER)
73  {
74  UdpHeader udpHeader;
75  C_Packet->RemoveHeader (udpHeader);
76  sourcePort = udpHeader.GetSourcePort ();
77  destPort = udpHeader.GetDestinationPort ();
78  }
79  else if (protocol == TcpL4Protocol::PROT_NUMBER)
80  {
81  TcpHeader tcpHeader;
82  C_Packet->RemoveHeader (tcpHeader);
83  sourcePort = tcpHeader.GetSourcePort ();
84  destPort = tcpHeader.GetDestinationPort ();
85  }
86  else
87  {
88  NS_LOG_INFO ("\t\t\tUnknown protocol: " << protocol);
89  return 0;
90  }
91 
92  NS_LOG_INFO ("Classifing packet: src_addr=" << source_address << " dst_addr="
93  << dest_address << " src_port=" << sourcePort << " dst_port="
94  << destPort << " proto=" << (uint16_t) protocol);
95  return (sfm->DoClassify (source_address,
96  dest_address,
97  sourcePort,
98  destPort,
99  protocol,dir));
100 }
101 
102 }