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| 1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
| 2 /* |
| 3 * Copyright (c) 2011 Hemanth Narra |
| 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 * Author: Hemanth Narra <hemanthnarra222@gmail.com> |
| 19 * |
| 20 * James P.G. Sterbenz <jpgs@ittc.ku.edu>, director |
| 21 * ResiliNets Research Group http://wiki.ittc.ku.edu/resilinets |
| 22 * Information and Telecommunication Technology Center (ITTC) |
| 23 * and Department of Electrical Engineering and Computer Science |
| 24 * The University of Kansas Lawrence, KS USA. |
| 25 * |
| 26 * Work supported in part by NSF FIND (Future Internet Design) Program |
| 27 * under grant CNS-0626918 (Postmodern Internet Architecture), |
| 28 * NSF grant CNS-1050226 (Multilayer Network Resilience Analysis and Experimenta
tion on GENI), |
| 29 * US Department of Defense (DoD), and ITTC at The University of Kansas. |
| 30 */ |
| 31 #include "ns3/assert.h" |
| 32 #include "ns3/log.h" |
| 33 #include "ns3/simulator.h" |
| 34 #include "ns3/trace-source-accessor.h" |
| 35 #include "ns3/wifi-mac-header.h" |
| 36 #include "tdma-central-mac.h" |
| 37 |
| 38 NS_LOG_COMPONENT_DEFINE ("TdmaCentralMac"); |
| 39 |
| 40 namespace ns3 { |
| 41 |
| 42 NS_OBJECT_ENSURE_REGISTERED (TdmaCentralMac); |
| 43 |
| 44 #undef NS_LOG_APPEND_CONTEXT |
| 45 #define NS_LOG_APPEND_CONTEXT if (m_low != 0) {std::clog << "[TdmaMac=" << m_low
->GetAddress () << "] "; } |
| 46 |
| 47 TypeId |
| 48 TdmaCentralMac::GetTypeId (void) |
| 49 { |
| 50 static TypeId tid = TypeId ("ns3::TdmaCentralMac") |
| 51 .SetParent<TdmaMac> () |
| 52 .AddConstructor<TdmaCentralMac> () |
| 53 .AddTraceSource ("MacTx", |
| 54 "A packet has been received from higher layers and is being
processed in preparation for " |
| 55 "queueing for transmission.", |
| 56 MakeTraceSourceAccessor (&TdmaCentralMac::m_macTxTrace)) |
| 57 .AddTraceSource ("MacTxDrop", |
| 58 "A packet has been dropped in the MAC layer before being qu
eued for transmission.", |
| 59 MakeTraceSourceAccessor (&TdmaCentralMac::m_macTxDropTrace)
) |
| 60 .AddTraceSource ("MacPromiscRx", |
| 61 "A packet has been received by this device, has been passed
up from the physical layer " |
| 62 "and is being forwarded up the local protocol stack. This
is a promiscuous trace,", |
| 63 MakeTraceSourceAccessor (&TdmaCentralMac::m_macPromiscRxTra
ce)) |
| 64 .AddTraceSource ("MacRx", |
| 65 "A packet has been received by this device, has been passed
up from the physical layer " |
| 66 "and is being forwarded up the local protocol stack. This
is a non-promiscuous trace,", |
| 67 MakeTraceSourceAccessor (&TdmaCentralMac::m_macRxTrace)) |
| 68 .AddTraceSource ("MacRxDrop", |
| 69 "A packet has been dropped in the MAC layer after it has be
en passed up from the physical " |
| 70 "layer.", |
| 71 MakeTraceSourceAccessor (&TdmaCentralMac::m_macRxDropTrace)
) |
| 72 ; |
| 73 return tid; |
| 74 } |
| 75 |
| 76 TdmaCentralMac::TdmaCentralMac () |
| 77 { |
| 78 NS_LOG_FUNCTION (this); |
| 79 m_isTdmaRunning = false; |
| 80 m_low = CreateObject<TdmaMacLow> (); |
| 81 m_queue = CreateObject<TdmaMacQueue> (); |
| 82 m_queue->SetTdmaMacTxDropCallback (MakeCallback (&TdmaCentralMac::NotifyTxDrop
, this)); |
| 83 } |
| 84 TdmaCentralMac::~TdmaCentralMac () |
| 85 { |
| 86 } |
| 87 |
| 88 void |
| 89 TdmaCentralMac::DoDispose (void) |
| 90 { |
| 91 m_low->Dispose (); |
| 92 m_low = 0; |
| 93 m_device = 0; |
| 94 m_queue = 0; |
| 95 m_tdmaController = 0; |
| 96 TdmaMac::DoDispose (); |
| 97 } |
| 98 |
| 99 void |
| 100 TdmaCentralMac::NotifyTx (Ptr<const Packet> packet) |
| 101 { |
| 102 m_macTxTrace (packet); |
| 103 } |
| 104 |
| 105 void |
| 106 TdmaCentralMac::NotifyTxDrop (Ptr<const Packet> packet) |
| 107 { |
| 108 m_macTxDropTrace (packet); |
| 109 } |
| 110 |
| 111 void |
| 112 TdmaCentralMac::NotifyRx (Ptr<const Packet> packet) |
| 113 { |
| 114 m_macRxTrace (packet); |
| 115 } |
| 116 |
| 117 void |
| 118 TdmaCentralMac::NotifyPromiscRx (Ptr<const Packet> packet) |
| 119 { |
| 120 m_macPromiscRxTrace (packet); |
| 121 } |
| 122 |
| 123 void |
| 124 TdmaCentralMac::NotifyRxDrop (Ptr<const Packet> packet) |
| 125 { |
| 126 m_macRxDropTrace (packet); |
| 127 } |
| 128 |
| 129 void |
| 130 TdmaCentralMac::SetChannel (Ptr<SimpleWirelessChannel> channel) |
| 131 { |
| 132 if (channel != 0) |
| 133 { |
| 134 m_channel = channel; |
| 135 m_tdmaController->SetChannel (channel); |
| 136 m_low->SetChannel (m_channel); |
| 137 } |
| 138 } |
| 139 |
| 140 Ptr<SimpleWirelessChannel> |
| 141 TdmaCentralMac::GetChannel (void) const |
| 142 { |
| 143 return m_channel; |
| 144 } |
| 145 |
| 146 void |
| 147 TdmaCentralMac::SetTdmaController (Ptr<TdmaController> controller) |
| 148 { |
| 149 m_tdmaController = controller; |
| 150 } |
| 151 |
| 152 Ptr<TdmaController> |
| 153 TdmaCentralMac::GetTdmaController (void) const |
| 154 { |
| 155 return m_tdmaController; |
| 156 } |
| 157 |
| 158 void |
| 159 TdmaCentralMac::SetDevice (Ptr<TdmaNetDevice> device) |
| 160 { |
| 161 m_device = device; |
| 162 m_low->SetDevice (m_device); |
| 163 } |
| 164 |
| 165 Ptr<TdmaNetDevice> |
| 166 TdmaCentralMac::GetDevice (void) const |
| 167 { |
| 168 return m_device; |
| 169 } |
| 170 |
| 171 Ptr<TdmaMacLow> |
| 172 TdmaCentralMac::GetTdmaMacLow (void) const |
| 173 { |
| 174 return m_low; |
| 175 } |
| 176 |
| 177 void |
| 178 TdmaCentralMac::SetForwardUpCallback (Callback<void,Ptr<Packet>, Mac48Address, M
ac48Address> upCallback) |
| 179 { |
| 180 NS_LOG_FUNCTION (this); |
| 181 m_upCallback = upCallback; |
| 182 } |
| 183 |
| 184 void |
| 185 TdmaCentralMac::SetLinkUpCallback (Callback<void> linkUp) |
| 186 { |
| 187 linkUp (); |
| 188 } |
| 189 |
| 190 void |
| 191 TdmaCentralMac::SetTxQueueStartCallback (Callback<bool,uint32_t> queueStart) |
| 192 { |
| 193 NS_LOG_FUNCTION (this); |
| 194 m_queueStart = queueStart; |
| 195 } |
| 196 |
| 197 void |
| 198 TdmaCentralMac::SetTxQueueStopCallback (Callback<bool,uint32_t> queueStop) |
| 199 { |
| 200 NS_LOG_FUNCTION (this); |
| 201 m_queueStop = queueStop; |
| 202 } |
| 203 |
| 204 uint32_t |
| 205 TdmaCentralMac::GetQueueState (uint32_t index) |
| 206 { |
| 207 if (m_queue->GetMaxSize () == m_queue->GetSize ()) |
| 208 { |
| 209 return 0; |
| 210 } |
| 211 else |
| 212 { |
| 213 return 1; |
| 214 } |
| 215 } |
| 216 |
| 217 uint32_t |
| 218 TdmaCentralMac::GetNQueues (void) |
| 219 { |
| 220 //TDMA currently has only one queue |
| 221 return 1; |
| 222 } |
| 223 |
| 224 void |
| 225 TdmaCentralMac::SetLinkDownCallback (Callback<void> linkDown) |
| 226 { |
| 227 } |
| 228 |
| 229 void |
| 230 TdmaCentralMac::SetMaxQueueSize (uint32_t size) |
| 231 { |
| 232 NS_LOG_FUNCTION (this << size); |
| 233 m_queue->SetMaxSize (size); |
| 234 } |
| 235 void |
| 236 TdmaCentralMac::SetMaxQueueDelay (Time delay) |
| 237 { |
| 238 NS_LOG_FUNCTION (this << delay); |
| 239 m_queue->SetMaxDelay (delay); |
| 240 } |
| 241 |
| 242 |
| 243 Mac48Address |
| 244 TdmaCentralMac::GetAddress (void) const |
| 245 { |
| 246 return m_low->GetAddress (); |
| 247 } |
| 248 Ssid |
| 249 TdmaCentralMac::GetSsid (void) const |
| 250 { |
| 251 return m_ssid; |
| 252 } |
| 253 void |
| 254 TdmaCentralMac::SetAddress (Mac48Address address) |
| 255 { |
| 256 NS_LOG_FUNCTION (address); |
| 257 m_low->SetAddress (address); |
| 258 m_low->SetBssid (address); |
| 259 } |
| 260 void |
| 261 TdmaCentralMac::SetSsid (Ssid ssid) |
| 262 { |
| 263 NS_LOG_FUNCTION (ssid); |
| 264 m_ssid = ssid; |
| 265 } |
| 266 Mac48Address |
| 267 TdmaCentralMac::GetBssid (void) const |
| 268 { |
| 269 return m_low->GetBssid (); |
| 270 } |
| 271 |
| 272 void |
| 273 TdmaCentralMac::ForwardUp (Ptr<Packet> packet, Mac48Address from, Mac48Address t
o) |
| 274 { |
| 275 NS_LOG_FUNCTION (this << packet << from); |
| 276 //NotifyRx(packet); |
| 277 m_upCallback (packet, from, to); |
| 278 } |
| 279 |
| 280 void |
| 281 TdmaCentralMac::Queue (Ptr<const Packet> packet, const WifiMacHeader &hdr) |
| 282 { |
| 283 NS_LOG_FUNCTION (this << packet << &hdr); |
| 284 if (!m_queue->Enqueue (packet, hdr)) |
| 285 { |
| 286 NotifyTxDrop (packet); |
| 287 } |
| 288 //Cannot request for channel access in tdma. Tdma schedules every node in roun
d robin manner |
| 289 //RequestForChannelAccess(); |
| 290 } |
| 291 |
| 292 void |
| 293 TdmaCentralMac::StartTransmission (uint64_t transmissionTimeUs) |
| 294 { |
| 295 NS_LOG_DEBUG (transmissionTimeUs << " usec"); |
| 296 Time totalTransmissionSlot = MicroSeconds (transmissionTimeUs); |
| 297 if (m_queue->IsEmpty ()) |
| 298 { |
| 299 NS_LOG_DEBUG ("queue empty"); |
| 300 return; |
| 301 } |
| 302 WifiMacHeader header; |
| 303 Ptr<const Packet> peekPacket = m_queue->Peek (&header); |
| 304 Time packetTransmissionTime = m_tdmaController->CalculateTxTime (peekPacket); |
| 305 NS_LOG_DEBUG ("Packet TransmissionTime(microSeconds): " << packetTransmissionT
ime.GetMicroSeconds () << "usec"); |
| 306 if (packetTransmissionTime < totalTransmissionSlot) |
| 307 { |
| 308 totalTransmissionSlot -= packetTransmissionTime; |
| 309 Simulator::Schedule (packetTransmissionTime, &TdmaCentralMac::SendPacketDo
wn, this,totalTransmissionSlot); |
| 310 } |
| 311 else |
| 312 { |
| 313 NS_LOG_DEBUG ("Packet takes more time to transmit than the slot allotted.
Will send in next slot"); |
| 314 } |
| 315 } |
| 316 |
| 317 void |
| 318 TdmaCentralMac::SendPacketDown (Time remainingTime) |
| 319 { |
| 320 WifiMacHeader header; |
| 321 Ptr<const Packet> packet = m_queue->Dequeue (&header); |
| 322 m_low->StartTransmission (packet, &header); |
| 323 TxQueueStart (0); |
| 324 NotifyTx (packet); |
| 325 TxQueueStart (0); |
| 326 StartTransmission (remainingTime.GetMicroSeconds ()); |
| 327 } |
| 328 |
| 329 void |
| 330 TdmaCentralMac::Enqueue (Ptr<const Packet> packet, Mac48Address to, Mac48Address
from) |
| 331 { |
| 332 NS_LOG_FUNCTION (this << packet << to << from); |
| 333 WifiMacHeader hdr; |
| 334 hdr.SetTypeData (); |
| 335 hdr.SetAddr1 (to); |
| 336 hdr.SetAddr2 (GetAddress ()); |
| 337 hdr.SetAddr3 (from); |
| 338 hdr.SetDsFrom (); |
| 339 hdr.SetDsNotTo (); |
| 340 Queue (packet, hdr); |
| 341 } |
| 342 void |
| 343 TdmaCentralMac::Enqueue (Ptr<const Packet> packet, Mac48Address to) |
| 344 { |
| 345 NS_LOG_FUNCTION (this << packet << to); |
| 346 WifiMacHeader hdr; |
| 347 hdr.SetTypeData (); |
| 348 hdr.SetAddr1 (to); |
| 349 hdr.SetAddr2 (GetAddress ()); |
| 350 hdr.SetAddr3 (m_low->GetAddress ()); |
| 351 hdr.SetDsFrom (); |
| 352 hdr.SetDsNotTo (); |
| 353 Queue (packet, hdr); |
| 354 NS_LOG_FUNCTION (this << packet << to); |
| 355 } |
| 356 bool |
| 357 TdmaCentralMac::SupportsSendFrom (void) const |
| 358 { |
| 359 return true; |
| 360 } |
| 361 |
| 362 void |
| 363 TdmaCentralMac::TxOk (const WifiMacHeader &hdr) |
| 364 { |
| 365 } |
| 366 void |
| 367 TdmaCentralMac::TxFailed (const WifiMacHeader &hdr) |
| 368 { |
| 369 } |
| 370 |
| 371 void |
| 372 TdmaCentralMac::TxQueueStart (uint32_t index) |
| 373 { |
| 374 NS_ASSERT (index < GetNQueues ()); |
| 375 m_queueStart (index); |
| 376 } |
| 377 void |
| 378 TdmaCentralMac::TxQueueStop (uint32_t index) |
| 379 { |
| 380 NS_ASSERT (index < GetNQueues ()); |
| 381 m_queueStop (index); |
| 382 } |
| 383 |
| 384 void |
| 385 TdmaCentralMac::Receive (Ptr<Packet> packet, const WifiMacHeader *hdr) |
| 386 { |
| 387 ForwardUp (packet, hdr->GetAddr3 (), hdr->GetAddr1 ()); |
| 388 } |
| 389 |
| 390 void |
| 391 TdmaCentralMac::DoStart (void) |
| 392 { |
| 393 NS_LOG_FUNCTION_NOARGS (); |
| 394 m_isTdmaRunning = true; |
| 395 m_queue->SetMacPtr (this); |
| 396 m_tdmaController->Start (); |
| 397 m_low->SetRxCallback (MakeCallback (&TdmaCentralMac::Receive, this)); |
| 398 TdmaMac::DoStart (); |
| 399 } |
| 400 |
| 401 } // namespace ns3 |
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