A Discrete-Event Network Simulator
API
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ampdu-subframe-header.cc
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1/*
2 * Copyright (c) 2013
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation;
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 *
17 * Author: Ghada Badawy <gbadawy@gmail.com>
18 */
19
21
22#include <iomanip>
23
24namespace ns3
25{
26
27NS_OBJECT_ENSURE_REGISTERED(AmpduSubframeHeader);
28
29TypeId
31{
32 static TypeId tid = TypeId("ns3::AmpduSubframeHeader")
34 .SetGroupName("Wifi")
35 .AddConstructor<AmpduSubframeHeader>();
36 return tid;
37}
38
41{
42 return GetTypeId();
43}
44
46 : m_length(0),
47 m_eof(false),
48 m_signature(0x4E) // Per 802.11 standard, the unique pattern is set to the value 0x4E.
49{
50}
51
53{
54}
55
58{
59 return (2 + 1 + 1);
60}
61
62void
64{
65 i.WriteHtolsbU16((m_eof << 15) | m_length);
66 i.WriteU8(1); // not used, CRC always set to 1
68}
69
72{
73 Buffer::Iterator i = start;
74 uint16_t field = i.ReadLsbtohU16();
75 m_eof = (field & 0x8000) >> 15;
76 m_length = (field & 0x3fff);
77 i.ReadU8(); // CRC
78 m_signature = i.ReadU8(); // SIG
79 return i.GetDistanceFrom(start);
80}
81
82void
83AmpduSubframeHeader::Print(std::ostream& os) const
84{
85 os << "EOF = " << m_eof << ", length = " << m_length << ", signature = 0x" << std::hex
86 << m_signature;
87}
88
89void
91{
92 m_length = length;
93}
94
95void
97{
98 m_eof = eof;
99}
100
101uint16_t
103{
104 return m_length;
105}
106
107bool
109{
110 return m_eof;
111}
112
113bool
115{
116 return m_signature == 0x4E;
117}
118
119} // namespace ns3
Headers for A-MPDU subframes.
uint32_t Deserialize(Buffer::Iterator start) override
uint16_t m_length
length field in bytes
TypeId GetInstanceTypeId() const override
Get the most derived TypeId for this Object.
void SetEof(bool eof)
Set the EOF field.
bool IsSignatureValid() const
Return whether the pattern stored in the delimiter signature field is correct, i.e.
void SetLength(uint16_t length)
Set the length field.
uint16_t GetLength() const
Return the length field.
bool GetEof() const
Return the EOF field.
uint32_t GetSerializedSize() const override
static TypeId GetTypeId()
Get the type ID.
uint8_t m_signature
delimiter signature (should correspond to pattern 0x4E in order to be assumed valid)
void Print(std::ostream &os) const override
void Serialize(Buffer::Iterator start) const override
iterator in a Buffer instance
Definition: buffer.h:100
void WriteHtolsbU16(uint16_t data)
Definition: buffer.cc:902
uint8_t ReadU8()
Definition: buffer.h:1027
void WriteU8(uint8_t data)
Definition: buffer.h:881
uint16_t ReadLsbtohU16()
Definition: buffer.cc:1064
uint32_t GetDistanceFrom(const Iterator &o) const
Definition: buffer.cc:780
Protocol header serialization and deserialization.
Definition: header.h:44
a unique identifier for an interface.
Definition: type-id.h:59
TypeId SetParent(TypeId tid)
Set the parent TypeId.
Definition: type-id.cc:932
#define NS_OBJECT_ENSURE_REGISTERED(type)
Register an Object subclass with the TypeId system.
Definition: object-base.h:46
Every class exported by the ns3 library is enclosed in the ns3 namespace.