-
Notifications
You must be signed in to change notification settings - Fork 0
/
epc-ue-nas.cc
312 lines (258 loc) · 6.31 KB
/
epc-ue-nas.cc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
/*
* Copyright (c) 2011 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: Nicola Baldo <nbaldo@cttc.es>
*/
#include <ns3/fatal-error.h>
#include <ns3/log.h>
#include <ns3/epc-helper.h>
#include "lte-enb-net-device.h"
#include "epc-ue-nas.h"
#include "lte-as-sap.h"
namespace ns3 {
NS_LOG_COMPONENT_DEFINE ("EpcUeNas");
/// Map each of UE NAS states to its string representation.
static const std::string g_ueNasStateName[EpcUeNas::NUM_STATES] =
{
"OFF",
"ATTACHING",
"IDLE_REGISTERED",
"CONNECTING_TO_EPC",
"ACTIVE"
};
/**
* \param s The UE NAS state.
* \return The string representation of the given state.
*/
static inline const std::string & ToString (EpcUeNas::State s)
{
return g_ueNasStateName[s];
}
NS_OBJECT_ENSURE_REGISTERED (EpcUeNas);
EpcUeNas::EpcUeNas ()
: m_state (OFF),
m_csgId (0),
m_asSapProvider (0),
m_bidCounter (0)
{
NS_LOG_FUNCTION (this);
m_asSapUser = new MemberLteAsSapUser<EpcUeNas> (this);
}
EpcUeNas::~EpcUeNas ()
{
NS_LOG_FUNCTION (this);
}
void
EpcUeNas::DoDispose ()
{
NS_LOG_FUNCTION (this);
delete m_asSapUser;
}
TypeId
EpcUeNas::GetTypeId (void)
{
static TypeId tid = TypeId ("ns3::EpcUeNas")
.SetParent<Object> ()
.SetGroupName("Lte")
.AddConstructor<EpcUeNas> ()
.AddTraceSource ("StateTransition",
"fired upon every UE NAS state transition",
MakeTraceSourceAccessor (&EpcUeNas::m_stateTransitionCallback),
"ns3::EpcUeNas::StateTracedCallback")
;
return tid;
}
void
EpcUeNas::SetDevice (Ptr<NetDevice> dev)
{
NS_LOG_FUNCTION (this << dev);
m_device = dev;
}
void
EpcUeNas::SetImsi (uint64_t imsi)
{
NS_LOG_FUNCTION (this << imsi);
m_imsi = imsi;
}
void
EpcUeNas::SetCsgId (uint32_t csgId)
{
NS_LOG_FUNCTION (this << csgId);
m_csgId = csgId;
m_asSapProvider->SetCsgWhiteList (csgId);
}
uint32_t
EpcUeNas::GetCsgId () const
{
NS_LOG_FUNCTION (this);
return m_csgId;
}
void
EpcUeNas::SetAsSapProvider (LteAsSapProvider* s)
{
NS_LOG_FUNCTION (this << s);
m_asSapProvider = s;
}
LteAsSapUser*
EpcUeNas::GetAsSapUser ()
{
NS_LOG_FUNCTION (this);
return m_asSapUser;
}
void
EpcUeNas::SetForwardUpCallback (Callback <void, Ptr<Packet> > cb)
{
NS_LOG_FUNCTION (this);
m_forwardUpCallback = cb;
}
void
EpcUeNas::StartCellSelection (uint16_t dlEarfcn)
{
NS_LOG_FUNCTION (this << dlEarfcn);
m_asSapProvider->StartCellSelection (dlEarfcn);
}
void
EpcUeNas::Connect ()
{
NS_LOG_FUNCTION (this);
// tell RRC to go into connected mode
m_asSapProvider->Connect ();
}
void
EpcUeNas::Connect (uint16_t cellId, uint16_t dlEarfcn)
{
NS_LOG_FUNCTION (this << cellId << dlEarfcn);
// force the UE RRC to be camped on a specific eNB
m_asSapProvider->ForceCampedOnEnb (cellId, dlEarfcn);
// tell RRC to go into connected mode
m_asSapProvider->Connect ();
}
void
EpcUeNas::Disconnect ()
{
NS_LOG_FUNCTION (this);
m_asSapProvider->Disconnect ();
SwitchToState (OFF);
}
void
EpcUeNas::ActivateEpsBearer (EpsBearer bearer, Ptr<EpcTft> tft)
{
NS_LOG_FUNCTION (this);
switch (m_state)
{
case ACTIVE:
NS_FATAL_ERROR ("the necessary NAS signaling to activate a bearer after the initial context has already been setup is not implemented");
break;
default:
BearerToBeActivated btba;
btba.bearer = bearer;
btba.tft = tft;
m_bearersToBeActivatedList.push_back (btba);
break;
}
}
bool
EpcUeNas::Send (Ptr<Packet> packet)
{
NS_LOG_FUNCTION (this << packet);
switch (m_state)
{
case ACTIVE:
{
uint32_t id = m_tftClassifier.Classify (packet, EpcTft::UPLINK);
NS_ASSERT ((id & 0xFFFFFF00) == 0);
uint8_t bid = (uint8_t) (id & 0x000000FF);
if (bid == 0)
{
return false;
}
else
{
m_asSapProvider->SendData (packet, bid);
return true;
}
}
break;
default:
NS_LOG_WARN (this << " NAS OFF, discarding packet");
return false;
break;
}
}
void
EpcUeNas::DoNotifyConnectionSuccessful ()
{
NS_LOG_FUNCTION (this);
SwitchToState (ACTIVE); // will eventually activate dedicated bearers
}
void
EpcUeNas::DoNotifyConnectionFailed ()
{
NS_LOG_FUNCTION (this);
// immediately retry the connection
Simulator::ScheduleNow (&LteAsSapProvider::Connect, m_asSapProvider);
}
void
EpcUeNas::DoRecvData (Ptr<Packet> packet)
{
NS_LOG_FUNCTION (this << packet);
m_forwardUpCallback (packet);
}
void
EpcUeNas::DoNotifyConnectionReleased ()
{
NS_LOG_FUNCTION (this);
SwitchToState (OFF);
}
void
EpcUeNas::DoActivateEpsBearer (EpsBearer bearer, Ptr<EpcTft> tft)
{
NS_LOG_FUNCTION (this);
NS_ASSERT_MSG (m_bidCounter < 11, "cannot have more than 11 EPS bearers");
uint8_t bid = ++m_bidCounter;
m_tftClassifier.Add (tft, bid);
}
EpcUeNas::State
EpcUeNas::GetState () const
{
NS_LOG_FUNCTION (this);
return m_state;
}
void
EpcUeNas::SwitchToState (State newState)
{
NS_LOG_FUNCTION (this << ToString (newState));
State oldState = m_state;
m_state = newState;
NS_LOG_INFO ("IMSI " << m_imsi << " NAS " << ToString (oldState) << " --> " << ToString (newState));
m_stateTransitionCallback (oldState, newState);
// actions to be done when entering a new state:
switch (m_state)
{
case ACTIVE:
for (std::list<BearerToBeActivated>::iterator it = m_bearersToBeActivatedList.begin ();
it != m_bearersToBeActivatedList.end ();
m_bearersToBeActivatedList.erase (it++))
{
DoActivateEpsBearer (it->bearer, it->tft);
}
break;
default:
break;
}
}
} // namespace ns3