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Unified Diff: src/nist/helper/nist-emu-epc-helper.cc

Issue 326890043: Public Safety Communication modeling tools based on ns-3
Patch Set: Created 6 years, 8 months ago
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Index: src/nist/helper/nist-emu-epc-helper.cc
===================================================================
new file mode 100644
--- /dev/null
+++ b/src/nist/helper/nist-emu-epc-helper.cc
@@ -0,0 +1,364 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2011-2013 Centre Tecnologic de Telecomunicacions de Catalunya (CTTC)
+ *
+ * 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
+ *
+ * Author: Jaume Nin <jnin@cttc.es>
+ * Nicola Baldo <nbaldo@cttc.es>
+ * Manuel Requena <manuel.requena@cttc.es>
+ */
+
+#include <ns3/nist-emu-nist-epc-helper.h>
+#include <ns3/log.h>
+#include <ns3/inet-socket-address.h>
+#include <ns3/mac48-address.h>
+#include <ns3/nist-eps-bearer.h>
+#include <ns3/ipv4-address.h>
+#include <ns3/internet-stack-helper.h>
+#include <ns3/packet-socket-helper.h>
+#include <ns3/packet-socket-address.h>
+#include <ns3/nist-epc-enb-application.h>
+#include <ns3/nist-epc-sgw-pgw-application.h>
+#include <ns3/emu-fd-net-device-helper.h>
+
+#include <ns3/nist-lte-enb-rrc.h>
+#include <ns3/nist-epc-x2.h>
+#include <ns3/nist-lte-enb-net-device.h>
+#include <ns3/nist-lte-ue-net-device.h>
+#include <ns3/nist-epc-mme.h>
+#include <ns3/nist-epc-ue-nas.h>
+#include <ns3/string.h>
+#include <ns3/abort.h>
+
+#include <iomanip>
+#include <iostream>
+
+namespace ns3 {
+
+NS_LOG_COMPONENT_DEFINE ("NistEmuNistEpcHelper");
+
+NS_OBJECT_ENSURE_REGISTERED (NistEmuNistEpcHelper);
+
+
+NistEmuNistEpcHelper::NistEmuNistEpcHelper ()
+ : m_gtpuUdpPort (2152) // fixed by the standard
+{
+ NS_LOG_FUNCTION (this);
+
+}
+
+NistEmuNistEpcHelper::~NistEmuNistEpcHelper ()
+{
+ NS_LOG_FUNCTION (this);
+}
+
+TypeId
+NistEmuNistEpcHelper::GetTypeId (void)
+{
+ static TypeId tid = TypeId ("ns3::NistEmuNistEpcHelper")
+ .SetParent<NistEpcHelper> ()
+ .AddConstructor<NistEmuNistEpcHelper> ()
+ .AddAttribute ("sgwDeviceName",
+ "The name of the device used for the S1-U interface of the SGW",
+ StringValue ("veth0"),
+ MakeStringAccessor (&NistEmuNistEpcHelper::m_sgwDeviceName),
+ MakeStringChecker ())
+ .AddAttribute ("enbDeviceName",
+ "The name of the device used for the S1-U interface of the eNB",
+ StringValue ("veth1"),
+ MakeStringAccessor (&NistEmuNistEpcHelper::m_enbDeviceName),
+ MakeStringChecker ())
+ .AddAttribute ("SgwMacAddress",
+ "MAC address used for the SGW ",
+ StringValue ("00:00:00:59:00:aa"),
+ MakeStringAccessor (&NistEmuNistEpcHelper::m_sgwMacAddress),
+ MakeStringChecker ())
+ .AddAttribute ("EnbMacAddressBase",
+ "First 5 bytes of the Enb MAC address base",
+ StringValue ("00:00:00:eb:00"),
+ MakeStringAccessor (&NistEmuNistEpcHelper::m_enbMacAddressBase),
+ MakeStringChecker ())
+ ;
+ return tid;
+}
+
+void
+NistEmuNistEpcHelper::DoInitialize ()
+{
+ NS_LOG_LOGIC (this);
+
+
+ // we use a /8 net for all UEs
+ m_ueAddressHelper.SetBase ("7.0.0.0", "255.0.0.0");
+
+
+
+ // create SgwPgwNode
+ m_sgwPgw = CreateObject<Node> ();
+ InternetStackHelper internet;
+ internet.SetIpv4StackInstall (true);
+ internet.Install (m_sgwPgw);
+
+ // create S1-U socket
+ Ptr<Socket> sgwPgwS1uSocket = Socket::CreateSocket (m_sgwPgw, TypeId::LookupByName ("ns3::UdpSocketFactory"));
+ int retval = sgwPgwS1uSocket->Bind (InetSocketAddress (Ipv4Address::GetAny (), m_gtpuUdpPort));
+ NS_ASSERT (retval == 0);
+
+ // create TUN device implementing tunneling of user data over GTP-U/UDP/IP
+ m_tunDevice = CreateObject<VirtualNetDevice> ();
+ // allow jumbo packets
+ m_tunDevice->SetAttribute ("Mtu", UintegerValue (30000));
+
+ // yes we need this
+ m_tunDevice->SetAddress (Mac48Address::Allocate ());
+
+ m_sgwPgw->AddDevice (m_tunDevice);
+ NetDeviceContainer tunDeviceContainer;
+ tunDeviceContainer.Add (m_tunDevice);
+
+ // the TUN device is on the same subnet as the UEs, so when a packet
+ // addressed to an UE arrives at the intenet to the WAN interface of
+ // the PGW it will be forwarded to the TUN device.
+ Ipv4InterfaceContainer tunDeviceIpv4IfContainer = m_ueAddressHelper.Assign (tunDeviceContainer);
+
+ // create NistEpcSgwPgwApplication
+ m_sgwPgwApp = CreateObject<NistEpcSgwPgwApplication> (m_tunDevice, sgwPgwS1uSocket);
+ m_sgwPgw->AddApplication (m_sgwPgwApp);
+
+ // connect SgwPgwApplication and virtual net device for tunneling
+ m_tunDevice->SetSendCallback (MakeCallback (&NistEpcSgwPgwApplication::RecvFromTunDevice, m_sgwPgwApp));
+
+ // Create MME and connect with SGW via S11 interface
+ m_mme = CreateObject<NistEpcMme> ();
+ m_mme->SetS11SapSgw (m_sgwPgwApp->GetS11SapSgw ());
+ m_sgwPgwApp->SetS11SapMme (m_mme->GetS11SapMme ());
+
+ // Create EmuFdNetDevice for SGW
+ EmuFdNetDeviceHelper emu;
+ NS_LOG_LOGIC ("SGW device: " << m_sgwDeviceName);
+ emu.SetDeviceName (m_sgwDeviceName);
+ NetDeviceContainer sgwDevices = emu.Install (m_sgwPgw);
+ Ptr<NetDevice> sgwDevice = sgwDevices.Get (0);
+ NS_LOG_LOGIC ("MAC address of SGW: " << m_sgwMacAddress);
+ sgwDevice->SetAttribute ("Address", Mac48AddressValue (m_sgwMacAddress.c_str ()));
+
+ // we use a /8 subnet so the SGW and the eNBs can talk directly to each other
+ m_epcIpv4AddressHelper.SetBase ("10.0.0.0", "255.255.255.0", "0.0.0.1");
+ m_sgwIpIfaces = m_epcIpv4AddressHelper.Assign (sgwDevices);
+ m_epcIpv4AddressHelper.SetBase ("10.0.0.0", "255.0.0.0", "0.0.0.101");
+
+
+ NistEpcHelper::DoInitialize ();
+}
+
+void
+NistEmuNistEpcHelper::DoDispose ()
+{
+ NS_LOG_FUNCTION (this);
+ m_tunDevice->SetSendCallback (MakeNullCallback<bool, Ptr<Packet>, const Address&, const Address&, uint16_t> ());
+ m_tunDevice = 0;
+ m_sgwPgwApp = 0;
+ m_sgwPgw->Dispose ();
+}
+
+
+void
+NistEmuNistEpcHelper::AddEnb (Ptr<Node> enb, Ptr<NetDevice> lteEnbNetDevice, uint16_t cellId)
+{
+ NS_LOG_FUNCTION (this << enb << lteEnbNetDevice << cellId);
+
+ Initialize ();
+
+ NS_ASSERT (enb == lteEnbNetDevice->GetNode ());
+
+ // add an IPv4 stack to the previously created eNB
+ InternetStackHelper internet;
+ internet.Install (enb);
+ NS_LOG_LOGIC ("number of Ipv4 ifaces of the eNB after node creation: " << enb->GetObject<Ipv4> ()->GetNInterfaces ());
+
+
+
+ // Create an EmuFdNetDevice for the eNB to connect with the SGW and other eNBs
+ EmuFdNetDeviceHelper emu;
+ NS_LOG_LOGIC ("eNB device: " << m_enbDeviceName);
+ emu.SetDeviceName (m_enbDeviceName);
+ NetDeviceContainer enbDevices = emu.Install (enb);
+
+ NS_ABORT_IF ((cellId == 0) || (cellId > 255));
+ std::ostringstream enbMacAddress;
+ enbMacAddress << m_enbMacAddressBase << ":" << std::hex << std::setfill ('0') << std::setw (2) << cellId;
+ NS_LOG_LOGIC ("MAC address of enB with cellId " << cellId << " : " << enbMacAddress.str ());
+ Ptr<NetDevice> enbDev = enbDevices.Get (0);
+ enbDev->SetAttribute ("Address", Mac48AddressValue (enbMacAddress.str ().c_str ()));
+
+ //emu.EnablePcap ("enbDevice", enbDev);
+
+ NS_LOG_LOGIC ("number of Ipv4 ifaces of the eNB after installing emu dev: " << enb->GetObject<Ipv4> ()->GetNInterfaces ());
+ Ipv4InterfaceContainer enbIpIfaces = m_epcIpv4AddressHelper.Assign (enbDevices);
+ NS_LOG_LOGIC ("number of Ipv4 ifaces of the eNB after assigning Ipv4 addr to S1 dev: " << enb->GetObject<Ipv4> ()->GetNInterfaces ());
+
+ Ipv4Address enbAddress = enbIpIfaces.GetAddress (0);
+ Ipv4Address sgwAddress = m_sgwIpIfaces.GetAddress (0);
+
+ // create S1-U socket for the ENB
+ Ptr<Socket> enbS1uSocket = Socket::CreateSocket (enb, TypeId::LookupByName ("ns3::UdpSocketFactory"));
+ int retval = enbS1uSocket->Bind (InetSocketAddress (enbAddress, m_gtpuUdpPort));
+ NS_ASSERT (retval == 0);
+
+ // create LTE socket for the ENB
+ Ptr<Socket> enbLteSocket = Socket::CreateSocket (enb, TypeId::LookupByName ("ns3::PacketSocketFactory"));
+ PacketSocketAddress enbLteSocketBindAddress;
+ enbLteSocketBindAddress.SetSingleDevice (lteEnbNetDevice->GetIfIndex ());
+ enbLteSocketBindAddress.SetProtocol (Ipv4L3Protocol::PROT_NUMBER);
+ retval = enbLteSocket->Bind (enbLteSocketBindAddress);
+ NS_ASSERT (retval == 0);
+ PacketSocketAddress enbLteSocketConnectAddress;
+ enbLteSocketConnectAddress.SetPhysicalAddress (Mac48Address::GetBroadcast ());
+ enbLteSocketConnectAddress.SetSingleDevice (lteEnbNetDevice->GetIfIndex ());
+ enbLteSocketConnectAddress.SetProtocol (Ipv4L3Protocol::PROT_NUMBER);
+ retval = enbLteSocket->Connect (enbLteSocketConnectAddress);
+ NS_ASSERT (retval == 0);
+
+
+ NS_LOG_INFO ("create NistEpcEnbApplication");
+ Ptr<NistEpcEnbApplication> enbApp = CreateObject<NistEpcEnbApplication> (enbLteSocket, enbS1uSocket, enbAddress, sgwAddress, cellId);
+ enb->AddApplication (enbApp);
+ NS_ASSERT (enb->GetNApplications () == 1);
+ NS_ASSERT_MSG (enb->GetApplication (0)->GetObject<NistEpcEnbApplication> () != 0, "cannot retrieve NistEpcEnbApplication");
+ NS_LOG_LOGIC ("enb: " << enb << ", enb->GetApplication (0): " << enb->GetApplication (0));
+
+
+ NS_LOG_INFO ("Create NistEpcX2 entity");
+ Ptr<NistEpcX2> x2 = CreateObject<NistEpcX2> ();
+ enb->AggregateObject (x2);
+
+ NS_LOG_INFO ("connect S1-AP interface");
+ m_mme->AddEnb (cellId, enbAddress, enbApp->GetS1apSapEnb ());
+ m_sgwPgwApp->AddEnb (cellId, enbAddress, sgwAddress);
+ enbApp->SetS1apSapMme (m_mme->GetS1apSapMme ());
+}
+
+
+void
+NistEmuNistEpcHelper::AddX2Interface (Ptr<Node> enb1, Ptr<Node> enb2)
+{
+ NS_LOG_FUNCTION (this << enb1 << enb2);
+
+ NS_LOG_WARN ("X2 support still untested");
+
+
+ // for X2, we reuse the same device and IP address of the S1-U interface
+ Ptr<Ipv4> enb1Ipv4 = enb1->GetObject<Ipv4> ();
+ Ptr<Ipv4> enb2Ipv4 = enb2->GetObject<Ipv4> ();
+ NS_LOG_LOGIC ("number of Ipv4 ifaces of the eNB #1: " << enb1Ipv4->GetNInterfaces ());
+ NS_LOG_LOGIC ("number of Ipv4 ifaces of the eNB #2: " << enb2Ipv4->GetNInterfaces ());
+ NS_LOG_LOGIC ("number of NetDevices of the eNB #1: " << enb1->GetNDevices ());
+ NS_LOG_LOGIC ("number of NetDevices of the eNB #2: " << enb2->GetNDevices ());
+
+ // 0 is the LTE device, 1 is localhost, 2 is the EPC NetDevice
+ Ptr<NetDevice> enb1EpcDev = enb1->GetDevice (2);
+ Ptr<NetDevice> enb2EpcDev = enb2->GetDevice (2);
+
+ int32_t enb1Interface = enb1Ipv4->GetInterfaceForDevice (enb1EpcDev);
+ int32_t enb2Interface = enb2Ipv4->GetInterfaceForDevice (enb2EpcDev);
+ NS_ASSERT (enb1Interface >= 0);
+ NS_ASSERT (enb2Interface >= 0);
+ NS_ASSERT (enb1Ipv4->GetNAddresses (enb1Interface) == 1);
+ NS_ASSERT (enb2Ipv4->GetNAddresses (enb2Interface) == 1);
+ Ipv4Address enb1Addr = enb1Ipv4->GetAddress (enb1Interface, 0).GetLocal ();
+ Ipv4Address enb2Addr = enb2Ipv4->GetAddress (enb2Interface, 0).GetLocal ();
+ NS_LOG_LOGIC (" eNB 1 IP address: " << enb1Addr);
+ NS_LOG_LOGIC (" eNB 2 IP address: " << enb2Addr);
+
+ // Add X2 interface to both eNBs' X2 entities
+ Ptr<NistEpcX2> enb1X2 = enb1->GetObject<NistEpcX2> ();
+ Ptr<NistLteEnbNetDevice> enb1LteDev = enb1->GetDevice (0)->GetObject<NistLteEnbNetDevice> ();
+ uint16_t enb1CellId = enb1LteDev->GetCellId ();
+ NS_LOG_LOGIC ("NistLteEnbNetDevice #1 = " << enb1LteDev << " - CellId = " << enb1CellId);
+
+ Ptr<NistEpcX2> enb2X2 = enb2->GetObject<NistEpcX2> ();
+ Ptr<NistLteEnbNetDevice> enb2LteDev = enb2->GetDevice (0)->GetObject<NistLteEnbNetDevice> ();
+ uint16_t enb2CellId = enb2LteDev->GetCellId ();
+ NS_LOG_LOGIC ("NistLteEnbNetDevice #2 = " << enb2LteDev << " - CellId = " << enb2CellId);
+
+ enb1X2->AddX2Interface (enb1CellId, enb1Addr, enb2CellId, enb2Addr);
+ enb2X2->AddX2Interface (enb2CellId, enb2Addr, enb1CellId, enb1Addr);
+
+ enb1LteDev->GetRrc ()->AddX2Neighbour (enb2LteDev->GetCellId ());
+ enb2LteDev->GetRrc ()->AddX2Neighbour (enb1LteDev->GetCellId ());
+}
+
+
+void
+NistEmuNistEpcHelper::AddUe (Ptr<NetDevice> ueDevice, uint64_t imsi)
+{
+ NS_LOG_FUNCTION (this << imsi << ueDevice );
+
+ m_mme->AddUe (imsi);
+ m_sgwPgwApp->AddUe (imsi);
+
+}
+
+uint8_t
+NistEmuNistEpcHelper::ActivateNistEpsBearer (Ptr<NetDevice> ueDevice, uint64_t imsi, Ptr<NistEpcTft> tft, NistEpsBearer bearer)
+{
+ NS_LOG_FUNCTION (this << ueDevice << imsi);
+
+ // we now retrieve the IPv4 address of the UE and notify it to the SGW;
+ // we couldn't do it before since address assignment is triggered by
+ // the user simulation program, rather than done by the EPC
+ Ptr<Node> ueNode = ueDevice->GetNode ();
+ Ptr<Ipv4> ueIpv4 = ueNode->GetObject<Ipv4> ();
+ NS_ASSERT_MSG (ueIpv4 != 0, "UEs need to have IPv4 installed before EPS bearers can be activated");
+ int32_t interface = ueIpv4->GetInterfaceForDevice (ueDevice);
+ NS_ASSERT (interface >= 0);
+ NS_ASSERT (ueIpv4->GetNAddresses (interface) == 1);
+ Ipv4Address ueAddr = ueIpv4->GetAddress (interface, 0).GetLocal ();
+ NS_LOG_LOGIC (" UE IP address: " << ueAddr); m_sgwPgwApp->SetUeAddress (imsi, ueAddr);
+
+ uint8_t bearerId = m_mme->AddBearer (imsi, tft, bearer);
+ Ptr<NistLteUeNetDevice> ueLteDevice = ueDevice->GetObject<NistLteUeNetDevice> ();
+ if (ueLteDevice)
+ {
+ Simulator::ScheduleNow (&NistEpcUeNas::ActivateNistEpsBearer, ueLteDevice->GetNas (), bearer, tft);
+ }
+ return bearerId;
+}
+
+
+Ptr<Node>
+NistEmuNistEpcHelper::GetPgwNode ()
+{
+ return m_sgwPgw;
+}
+
+
+Ipv4InterfaceContainer
+NistEmuNistEpcHelper::AssignUeIpv4Address (NetDeviceContainer ueDevices)
+{
+ return m_ueAddressHelper.Assign (ueDevices);
+}
+
+
+
+Ipv4Address
+NistEmuNistEpcHelper::GetUeDefaultGatewayAddress ()
+{
+ // return the address of the tun device
+ return m_sgwPgw->GetObject<Ipv4> ()->GetAddress (1, 0).GetLocal ();
+}
+
+
+} // namespace ns3
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