--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/devices/mesh/dot11s/peer-management-plugin.cc Wed Mar 25 17:37:51 2009 +0300
@@ -0,0 +1,237 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2009 IITP RAS
+ *
+ * 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: Kirill Andreev <andreev@iitp.ru>
+ */
+
+#include "ns3/mesh-wifi-interface-mac.h"
+#include "ie-dot11s-configuration.h"
+#include "ie-dot11s-peer-management.h"
+#include "peer-management-plugin.h"
+#include "peer-link-frame.h"
+#include "ns3/mesh-wifi-mac-header.h"
+#include "ns3/simulator.h"
+#include "ns3/wifi-mac-header.h"
+#include "ns3/mesh-wifi-mac-header.h"
+#include "ns3/log.h"
+
+NS_LOG_COMPONENT_DEFINE("PeerManager");
+namespace ns3 {
+namespace dot11s {
+PeerManagerMacPlugin::PeerManagerMacPlugin (uint32_t interface, Ptr<PeerManagerProtocol> protocol)
+{
+ m_ifIndex = interface;
+ m_protocol = protocol;
+}
+
+PeerManagerMacPlugin::~PeerManagerMacPlugin ()
+{
+}
+
+void
+PeerManagerMacPlugin::SetParent (Ptr<MeshWifiInterfaceMac> parent)
+{
+ m_parent = parent;
+}
+
+bool
+PeerManagerMacPlugin::Receive (Ptr<Packet> const_packet, const WifiMacHeader & header)
+{
+ // First of all we copy a packet, because we need to remove some
+ //headers
+ Ptr<Packet> packet = const_packet->Copy();
+ if(header.IsBeacon())
+ {
+ IeBeaconTiming beaconTiming;
+ Ptr<Packet> myBeacon = packet->Copy();
+ MgtBeaconHeader beacon_hdr;
+ myBeacon->RemoveHeader(beacon_hdr);
+ bool meshBeacon = false;
+ if(beaconTiming.FindFirst(myBeacon))
+ meshBeacon = true;
+ m_protocol->UpdatePeerBeaconTiming(
+ m_ifIndex,
+ meshBeacon,
+ beaconTiming,
+ header.GetAddr2(),
+ Simulator::Now(),
+ MicroSeconds(beacon_hdr.GetBeaconIntervalUs())
+ );
+ // Beacon shall not be dropeed. May be needed to another plugins
+ return true;
+ }
+ if(header.IsMultihopAction())
+ {
+ WifiMeshHeader meshHdr;
+ packet->RemoveHeader (meshHdr);
+ WifiMeshMultihopActionHeader multihopHdr;
+ //parse multihop action header:
+ packet->RemoveHeader (multihopHdr);
+ WifiMeshMultihopActionHeader::ACTION_VALUE actionValue = multihopHdr.GetAction ();
+ // If can not handle - just return;
+ if(multihopHdr.GetCategory () != WifiMeshMultihopActionHeader::MESH_PEER_LINK_MGT)
+ return true;
+ Mac48Address peerAddress = header.GetAddr2 ();
+ PeerLinkFrameStart::PlinkFrameStartFields fields;
+ {
+ PeerLinkFrameStart peerFrame;
+ packet->RemoveHeader (peerFrame);
+ fields = peerFrame.GetFields();
+ }
+ if (actionValue.peerLink != WifiMeshMultihopActionHeader::PEER_LINK_CLOSE)
+ {
+ if(!(m_parent->CheckSupportedRates(fields.rates)))
+ {
+ m_protocol->ConfigurationMismatch (m_ifIndex, peerAddress);
+ // Broken peer link frame - drop it
+ return false;
+ }
+ if (!fields.meshId.IsEqual(m_parent->GetSsid()))
+ {
+ m_protocol->ConfigurationMismatch (m_ifIndex, peerAddress);
+ // Broken peer link frame - drop it
+ return true;
+ }
+ }
+ // MeshConfiguration Element - exists in all peer link management
+ // frames except CLOSE
+ IeConfiguration meshConfig;
+ if(fields.subtype != IePeerManagement::PEER_CLOSE)
+ packet->RemoveHeader(meshConfig);
+ IePeerManagement peerElement;
+ packet->RemoveHeader(peerElement);
+ // Check the correspondance betwee action valuse and peer link
+ // management element subtypes:
+ switch (actionValue.peerLink)
+ {
+ case WifiMeshMultihopActionHeader::PEER_LINK_CONFIRM:
+ NS_ASSERT(fields.subtype == IePeerManagement::PEER_CONFIRM);
+ break;
+ case WifiMeshMultihopActionHeader::PEER_LINK_OPEN:
+ NS_ASSERT(fields.subtype == IePeerManagement::PEER_OPEN);
+ break;
+ case WifiMeshMultihopActionHeader::PEER_LINK_CLOSE:
+ NS_ASSERT(fields.subtype == IePeerManagement::PEER_CLOSE);
+ break;
+ default:
+ // Protocol can not define which frame is it - pass further
+ return true;
+ }
+ //Deliver Peer link management frame to protocol:
+ m_protocol->ReceivePeerLinkFrame(m_ifIndex, peerAddress, fields.aid, peerElement, meshConfig);
+ // if we can handle a frame - drop it
+ return false;
+ }
+ return true;
+}
+
+bool
+PeerManagerMacPlugin::UpdateOutcomingFrame (Ptr<Packet> packet, WifiMacHeader & header, Mac48Address from, Mac48Address to) const
+{
+ return true;
+}
+
+void
+PeerManagerMacPlugin::UpdateBeacon (MeshWifiBeacon & beacon) const
+{
+ Ptr<IeBeaconTiming> beaconTiming = m_protocol->GetBeaconTimingElement(m_ifIndex);
+ beacon.AddInformationElement(beaconTiming);
+}
+
+void
+PeerManagerMacPlugin::SendPeerLinkManagementFrame(
+ Mac48Address peerAddress,
+ uint16_t aid,
+ IePeerManagement peerElement,
+ IeConfiguration meshConfig
+ )
+{
+ //Create a packet:
+ Ptr<Packet> packet = Create<Packet> ();
+ packet->AddHeader (peerElement);
+ if(!peerElement.SubtypeIsClose())
+ packet->AddHeader (meshConfig);
+ PeerLinkFrameStart::PlinkFrameStartFields fields;
+ fields.subtype = peerElement.GetSubtype();
+ fields.aid = aid;
+ fields.rates = m_parent->GetSupportedRates ();
+ fields.meshId = m_parent->GetSsid ();
+ PeerLinkFrameStart plinkFrame;
+ plinkFrame.SetPlinkFrameStart(fields);
+ packet->AddHeader (plinkFrame);
+ //Create an 802.11 frame header:
+ //Send management frame to MAC:
+ WifiMeshMultihopActionHeader multihopHdr;
+ if (peerElement.SubtypeIsOpen ())
+ {
+ WifiMeshMultihopActionHeader::ACTION_VALUE action;
+ action.peerLink = WifiMeshMultihopActionHeader::PEER_LINK_OPEN;
+ multihopHdr.SetAction (WifiMeshMultihopActionHeader::MESH_PEER_LINK_MGT, action);
+ }
+ if (peerElement.SubtypeIsConfirm ())
+ {
+ WifiMeshMultihopActionHeader::ACTION_VALUE action;
+ action.peerLink = WifiMeshMultihopActionHeader::PEER_LINK_CONFIRM;
+ multihopHdr.SetAction (WifiMeshMultihopActionHeader::MESH_PEER_LINK_MGT, action);
+ }
+ if (peerElement.SubtypeIsClose ())
+ {
+ WifiMeshMultihopActionHeader::ACTION_VALUE action;
+ action.peerLink = WifiMeshMultihopActionHeader::PEER_LINK_CLOSE;
+ multihopHdr.SetAction (WifiMeshMultihopActionHeader::MESH_PEER_LINK_MGT, action);
+ }
+ packet->AddHeader (multihopHdr);
+ //mesh header:
+ WifiMeshHeader meshHdr;
+ meshHdr.SetMeshTtl (1);
+ meshHdr.SetMeshSeqno (0);
+ packet->AddHeader (meshHdr);
+ //Wifi Mac header:
+ WifiMacHeader hdr;
+ hdr.SetMultihopAction ();
+ hdr.SetAddr1 (peerAddress);
+ hdr.SetAddr2 (m_parent->GetAddress ());
+ hdr.SetAddr3 (m_parent->GetAddress ());
+ hdr.SetDsNotFrom ();
+ hdr.SetDsNotTo ();
+ m_parent->SendManagementFrame(packet, hdr);
+}
+
+Mac48Address
+PeerManagerMacPlugin::GetAddress () const
+{
+ if(m_parent != 0)
+ return m_parent->GetAddress ();
+ else return Mac48Address::Mac48Address();
+}
+std::pair<Time, Time>
+PeerManagerMacPlugin::GetBeaconInfo() const
+{
+ std::pair<Time,Time> retval;
+ retval.first = m_parent->GetTbtt ();
+ retval.second = m_parent->GetBeaconInterval ();
+ return retval;
+}
+void
+PeerManagerMacPlugin::SetBeaconShift(Time shift)
+{
+ m_parent->ShiftTbtt (shift);
+}
+
+} // namespace dot11s
+} //namespace ns3
+