120 lines
2.6 KiB
C++
120 lines
2.6 KiB
C++
/*
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* Copyright (c) 2013
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Ghada Badawy <gbadawy@gmail.com>
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*/
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#include "ampdu-subframe-header.h"
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#include <iomanip>
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namespace ns3
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{
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NS_OBJECT_ENSURE_REGISTERED(AmpduSubframeHeader);
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TypeId
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AmpduSubframeHeader::GetTypeId()
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{
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static TypeId tid = TypeId("ns3::AmpduSubframeHeader")
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.SetParent<Header>()
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.SetGroupName("Wifi")
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.AddConstructor<AmpduSubframeHeader>();
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return tid;
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}
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TypeId
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AmpduSubframeHeader::GetInstanceTypeId() const
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{
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return GetTypeId();
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}
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AmpduSubframeHeader::AmpduSubframeHeader()
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: m_length(0),
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m_eof(0),
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m_signature(0x4E) // Per 802.11 standard, the unique pattern is set to the value 0x4E.
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{
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}
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AmpduSubframeHeader::~AmpduSubframeHeader()
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{
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}
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uint32_t
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AmpduSubframeHeader::GetSerializedSize() const
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{
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return (2 + 1 + 1);
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}
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void
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AmpduSubframeHeader::Serialize(Buffer::Iterator i) const
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{
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i.WriteHtolsbU16((m_eof << 15) | m_length);
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i.WriteU8(1); // not used, CRC always set to 1
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i.WriteU8(m_signature);
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}
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uint32_t
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AmpduSubframeHeader::Deserialize(Buffer::Iterator start)
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{
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Buffer::Iterator i = start;
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uint16_t field = i.ReadLsbtohU16();
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m_eof = (field & 0x8000) >> 15;
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m_length = (field & 0x3fff);
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i.ReadU8(); // CRC
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m_signature = i.ReadU8(); // SIG
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return i.GetDistanceFrom(start);
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}
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void
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AmpduSubframeHeader::Print(std::ostream& os) const
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{
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os << "EOF = " << m_eof << ", length = " << m_length << ", signature = 0x" << std::hex
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<< m_signature;
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}
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void
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AmpduSubframeHeader::SetLength(uint16_t length)
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{
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m_length = length;
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}
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void
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AmpduSubframeHeader::SetEof(bool eof)
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{
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m_eof = eof;
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}
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uint16_t
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AmpduSubframeHeader::GetLength() const
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{
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return m_length;
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}
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bool
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AmpduSubframeHeader::GetEof() const
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{
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return m_eof;
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}
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bool
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AmpduSubframeHeader::IsSignatureValid() const
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{
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return m_signature == 0x4E;
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}
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} // namespace ns3
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