/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
/*
* Copyright (c) 2005,2006 INRIA
*
* 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: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
*/
#include "mac-high-nqap.h"
#include "mac-stations.h"
#include "dca-txop.h"
#include "wifi-net-device.h"
#include "wifi-mac-header.h"
#include "wifi-default-parameters.h"
#include "mgt-headers.h"
#include "wifi-phy.h"
#include "ns3/assert.h"
#include "ns3/log.h"
#include "ns3/simulator.h"
#include "ns3/node.h"
NS_LOG_COMPONENT_DEFINE ("MacHighNqap");
#define TRACE(x) \
NS_LOG_DEBUG(Simulator::Now () << " " << m_phy->GetDevice ()->GetNode ()->GetId () << ":" << \
m_phy->GetDevice ()->GetIfIndex () << " " << x);
namespace ns3 {
MacHighNqap::MacHighNqap ()
: m_beaconInterval (WifiDefaultParameters::GetApBeaconInterval ())
{}
MacHighNqap::~MacHighNqap ()
{
m_phy = 0;
}
void
MacHighNqap::SetDcaTxop (DcaTxop *dca)
{
m_dca = dca;
m_dca->SetTxOkCallback (MakeCallback (&MacHighNqap::TxOk, this));
m_dca->SetTxFailedCallback (MakeCallback (&MacHighNqap::TxFailed, this));
}
void
MacHighNqap::SetBeaconDcaTxop (DcaTxop *dca)
{
// we do not need to be notified when a beacon has been transmitted
// successfully or not.
m_beaconDca = dca;
}
void
MacHighNqap::SetDevice (WifiNetDevice *device)
{
m_device = device;
}
void
MacHighNqap::SetStations (MacStations *stations)
{
m_stations = stations;
}
void
MacHighNqap::SetPhy (Ptr<WifiPhy> phy)
{
m_phy = phy;
}
void
MacHighNqap::SetForwardCallback (ForwardCallback callback)
{
m_forwardUp = callback;
}
void
MacHighNqap::SetBeaconInterval (Time interval)
{
m_beaconInterval = interval;
}
void
MacHighNqap::StartBeaconing (void)
{
SendOneBeacon ();
}
void
MacHighNqap::ForwardDown (Packet packet, Mac48Address from, Mac48Address to)
{
WifiMacHeader hdr;
hdr.SetTypeData ();
hdr.SetAddr1 (to);
hdr.SetAddr2 (m_device->GetSelfAddress ());
hdr.SetAddr3 (from);
hdr.SetDsFrom ();
hdr.SetDsNotTo ();
m_dca->Queue (packet, hdr);
}
void
MacHighNqap::Queue (Packet packet, Mac48Address to)
{
ForwardDown (packet, m_device->GetSelfAddress (), to);
}
SupportedRates
MacHighNqap::GetSupportedRates (void) const
{
// send the set of supported rates and make sure that we indicate
// the Basic Rate set in this set of supported rates.
SupportedRates rates;
for (uint32_t i = 0; i < m_phy->GetNModes (); i++)
{
WifiMode mode = m_phy->GetMode (i);
rates.AddSupportedRate (mode.GetPhyRate ());
}
// set the basic rates
for (uint32_t j = 0; j < m_stations->GetNBasicModes (); j++)
{
WifiMode mode = m_stations->GetBasicMode (j);
rates.SetBasicRate (mode.GetPhyRate ());
}
return rates;
}
void
MacHighNqap::SendProbeResp (Mac48Address to)
{
TRACE ("send probe response to="<<to);
WifiMacHeader hdr;
hdr.SetProbeResp ();
hdr.SetAddr1 (to);
hdr.SetAddr2 (m_device->GetSelfAddress ());
hdr.SetAddr3 (m_device->GetSelfAddress ());
hdr.SetDsNotFrom ();
hdr.SetDsNotTo ();
Packet packet;
MgtProbeResponseHeader probe;
probe.SetSsid (m_device->GetSsid ());
probe.SetSupportedRates (GetSupportedRates ());
probe.SetBeaconIntervalUs (m_beaconInterval.GetMicroSeconds ());
packet.AddHeader (probe);
m_dca->Queue (packet, hdr);
}
void
MacHighNqap::SendAssocResp (Mac48Address to, bool success)
{
TRACE ("send assoc response to="<<to);
WifiMacHeader hdr;
hdr.SetAssocResp ();
hdr.SetAddr1 (to);
hdr.SetAddr2 (m_device->GetSelfAddress ());
hdr.SetAddr3 (m_device->GetSelfAddress ());
hdr.SetDsNotFrom ();
hdr.SetDsNotTo ();
Packet packet;
MgtAssocResponseHeader assoc;
StatusCode code;
if (success)
{
code.SetSuccess ();
}
else
{
code.SetFailure ();
}
assoc.SetSupportedRates (GetSupportedRates ());
assoc.SetStatusCode (code);
packet.AddHeader (assoc);
m_dca->Queue (packet, hdr);
}
void
MacHighNqap::SendOneBeacon (void)
{
TRACE ("send beacon to="<<Mac48Address::GetBroadcast ());
WifiMacHeader hdr;
hdr.SetBeacon ();
hdr.SetAddr1 (Mac48Address::GetBroadcast ());
hdr.SetAddr2 (m_device->GetSelfAddress ());
hdr.SetAddr3 (m_device->GetSelfAddress ());
hdr.SetDsNotFrom ();
hdr.SetDsNotTo ();
Packet packet;
MgtBeaconHeader beacon;
beacon.SetSsid (m_device->GetSsid ());
beacon.SetSupportedRates (GetSupportedRates ());
beacon.SetBeaconIntervalUs (m_beaconInterval.GetMicroSeconds ());
packet.AddHeader (beacon);
m_beaconDca->Queue (packet, hdr);
Simulator::Schedule (m_beaconInterval, &MacHighNqap::SendOneBeacon, this);
}
void
MacHighNqap::TxOk (WifiMacHeader const &hdr)
{
MacStation *station = m_stations->Lookup (hdr.GetAddr1 ());
if (hdr.IsAssocResp () &&
station->IsWaitAssocTxOk ())
{
TRACE ("associated with sta="<<hdr.GetAddr1 ());
station->RecordGotAssocTxOk ();
}
}
void
MacHighNqap::TxFailed (WifiMacHeader const &hdr)
{
MacStation *station = m_stations->Lookup (hdr.GetAddr1 ());
if (hdr.IsAssocResp () &&
station->IsWaitAssocTxOk ())
{
TRACE ("assoc failed with sta="<<hdr.GetAddr1 ());
station->RecordGotAssocTxFailed ();
}
}
void
MacHighNqap::Receive (Packet packet, WifiMacHeader const *hdr)
{
MacStation *station = m_stations->Lookup (hdr->GetAddr2 ());
if (hdr->IsData ())
{
if (!hdr->IsFromDs () &&
hdr->IsToDs () &&
hdr->GetAddr1 () == m_device->GetSelfAddress () &&
station->IsAssociated ())
{
if (hdr->GetAddr3 () == m_device->GetSelfAddress ())
{
m_forwardUp (packet, hdr->GetAddr2 ());
}
else
{
ForwardDown (packet,
hdr->GetAddr2 (),
hdr->GetAddr3 ());
m_forwardUp (packet, hdr->GetAddr2 ());
}
}
else if (hdr->IsFromDs () &&
hdr->IsToDs ())
{
// this is an AP-to-AP frame
// we ignore for now.
}
else
{
// we can ignore these frames since
// they are not targeted at the AP
}
}
else if (hdr->IsMgt ())
{
if (hdr->IsProbeReq ())
{
NS_ASSERT (hdr->GetAddr1 ().IsBroadcast ());
SendProbeResp (hdr->GetAddr2 ());
}
else if (hdr->GetAddr1 () == m_device->GetSelfAddress ())
{
if (hdr->IsAssocReq ())
{
// first, verify that the the station's supported
// rate set is compatible with our Basic Rate set
MgtAssocRequestHeader assocReq;
packet.RemoveHeader (assocReq);
SupportedRates rates = assocReq.GetSupportedRates ();
bool problem = false;
for (uint32_t i = 0; i < m_stations->GetNBasicModes (); i++)
{
WifiMode mode = m_stations->GetBasicMode (i);
if (!rates.IsSupportedRate (mode.GetPhyRate ()))
{
problem = true;
break;
}
}
if (problem)
{
// one of the Basic Rate set mode is not
// supported by the station. So, we return an assoc
// response with an error status.
SendAssocResp (hdr->GetAddr2 (), false);
}
else
{
// station supports all rates in Basic Rate Set.
// record all its supported modes in its associated MacStation
for (uint32_t j = 0; j < m_phy->GetNModes (); j++)
{
WifiMode mode = m_phy->GetMode (j);
if (rates.IsSupportedRate (mode.GetPhyRate ()))
{
station->AddSupportedMode (mode);
}
}
station->RecordWaitAssocTxOk ();
// send assoc response with success status.
SendAssocResp (hdr->GetAddr2 (), true);
}
}
else if (hdr->IsDisassociation ())
{
station->RecordDisassociated ();
}
else if (hdr->IsReassocReq ())
{
/* we don't support reassoc frames for now */
}
else if (hdr->IsAuthentication () ||
hdr->IsDeauthentication ())
{
/*
*/
}
else
{
/* unknown mgt frame
*/
}
}
}
else
{
/* damn, what could this be ? a control frame ?
* control frames should never reach the MacHigh so,
* this is likely to be a bug. assert.
*/
NS_ASSERT (false);
}
}
} // namespace ns3