A Discrete-Event Network Simulator
API
mac-tx-middle.cc
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1/*
2 * Copyright (c) 2005, 2009 INRIA
3 * Copyright (c) 2009 MIRKO BANCHI
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 * Authors: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
19 * Mirko Banchi <mk.banchi@gmail.com>
20 * Ghada Badawy <gbadawy@gmail.com>
21 */
22
23#include "mac-tx-middle.h"
24
25#include "wifi-mac-header.h"
26
27#include "ns3/log.h"
28
29namespace ns3
30{
31
32NS_LOG_COMPONENT_DEFINE("MacTxMiddle");
33
35 : m_sequence(0)
36{
37 NS_LOG_FUNCTION(this);
38}
39
41{
42 NS_LOG_FUNCTION(this);
43 for (std::map<Mac48Address, uint16_t*>::const_iterator i = m_qosSequences.begin();
44 i != m_qosSequences.end();
45 i++)
46 {
47 delete[] i->second;
48 }
49}
50
51uint16_t
53{
54 NS_LOG_FUNCTION(this);
55 uint16_t retval;
56 if (hdr->IsQosData() && !hdr->GetAddr1().IsGroup())
57 {
58 uint8_t tid = hdr->GetQosTid();
59 NS_ASSERT(tid < 16);
60 std::map<Mac48Address, uint16_t*>::const_iterator it = m_qosSequences.find(hdr->GetAddr1());
61 if (it != m_qosSequences.end())
62 {
63 retval = it->second[tid];
64 it->second[tid]++;
65 it->second[tid] %= 4096;
66 }
67 else
68 {
69 retval = 0;
70 std::pair<Mac48Address, uint16_t*> newSeq(hdr->GetAddr1(), new uint16_t[16]);
71 std::pair<std::map<Mac48Address, uint16_t*>::const_iterator, bool> newIns =
72 m_qosSequences.insert(newSeq);
73 NS_ASSERT(newIns.second == true);
74 for (uint8_t i = 0; i < 16; i++)
75 {
76 newIns.first->second[i] = 0;
77 }
78 newIns.first->second[tid]++;
79 }
80 }
81 else
82 {
83 retval = m_sequence;
84 m_sequence++;
85 m_sequence %= 4096;
86 }
87 return retval;
88}
89
90uint16_t
92{
93 NS_LOG_FUNCTION(this);
94 uint16_t retval;
95 if (hdr->IsQosData() && !hdr->GetAddr1().IsGroup())
96 {
97 uint8_t tid = hdr->GetQosTid();
98 NS_ASSERT(tid < 16);
99 std::map<Mac48Address, uint16_t*>::const_iterator it = m_qosSequences.find(hdr->GetAddr1());
100 if (it != m_qosSequences.end())
101 {
102 retval = it->second[tid];
103 }
104 else
105 {
106 retval = 0;
107 }
108 }
109 else
110 {
111 retval = m_sequence;
112 }
113 return retval;
114}
115
116uint16_t
118{
119 NS_LOG_FUNCTION(this);
120 NS_ASSERT(tid < 16);
121 uint16_t seq = 0;
122 std::map<Mac48Address, uint16_t*>::const_iterator it = m_qosSequences.find(addr);
123 if (it != m_qosSequences.end())
124 {
125 return it->second[tid];
126 }
127 return seq;
128}
129
130void
132{
133 NS_LOG_FUNCTION(this << *hdr);
134
135 if (hdr->IsQosData() && !hdr->GetAddr1().IsGroup())
136 {
137 uint8_t tid = hdr->GetQosTid();
138 NS_ASSERT(tid < 16);
139 auto it = m_qosSequences.find(hdr->GetAddr1());
140 NS_ASSERT(it != m_qosSequences.end());
141 it->second[tid] = hdr->GetSequenceNumber();
142 }
143 else
144 {
146 }
147}
148
149} // namespace ns3
an EUI-48 address
Definition: mac48-address.h:46
bool IsGroup() const
void SetSequenceNumberFor(const WifiMacHeader *hdr)
Set the sequence number of the given MAC header as the next sequence number for the Traffic ID and de...
std::map< Mac48Address, uint16_t * > m_qosSequences
QOS sequences.
Definition: mac-tx-middle.h:79
uint16_t m_sequence
current sequence number
Definition: mac-tx-middle.h:80
uint16_t GetNextSeqNumberByTidAndAddress(uint8_t tid, Mac48Address addr) const
Return the next sequence number for the Traffic ID and destination.
uint16_t GetNextSequenceNumberFor(const WifiMacHeader *hdr)
Return the next sequence number for the given header.
uint16_t PeekNextSequenceNumberFor(const WifiMacHeader *hdr)
Return the next sequence number for the Traffic ID and destination, but do not pick it (i....
Implements the IEEE 802.11 MAC header.
uint8_t GetQosTid() const
Return the Traffic ID of a QoS header.
Mac48Address GetAddr1() const
Return the address in the Address 1 field.
uint16_t GetSequenceNumber() const
Return the sequence number of the header.
bool IsQosData() const
Return true if the Type is DATA and Subtype is one of the possible values for QoS Data.
#define NS_ASSERT(condition)
At runtime, in debugging builds, if this condition is not true, the program prints the source file,...
Definition: assert.h:66
#define NS_LOG_COMPONENT_DEFINE(name)
Define a Log component with a specific name.
Definition: log.h:202
#define NS_LOG_FUNCTION(parameters)
If log level LOG_FUNCTION is enabled, this macro will output all input parameters separated by ",...
Every class exported by the ns3 library is enclosed in the ns3 namespace.