inet::ieee80211::QoSDuplicateRemoval Class Reference

#include <QosDuplicateRemoval.h>

Inheritance diagram for inet::ieee80211::QoSDuplicateRemoval:

Public Member Functions
virtual bool	isDuplicate (Ieee80211DataOrMgmtFrame *frame) override
Public Member Functions inherited from inet::ieee80211::IDuplicateRemoval
virtual	~IDuplicateRemoval ()

Protected Types
typedef std::pair< MACAddress, Tid >	Key
typedef std::map< Key, SequenceControlField >	Key2SeqValMap
typedef std::map< MACAddress, SequenceControlField >	Mac2SeqValMap

Protected Attributes
Key2SeqValMap	lastSeenSeqNumCache
Mac2SeqValMap	lastSeenSharedSeqNumCache
Mac2SeqValMap	lastSeenTimePriorityManagementSeqNumCache

Member Typedef Documentation

typedef std::pair<MACAddress, Tid> inet::ieee80211::QoSDuplicateRemoval::Key

protected

typedef std::map<Key, SequenceControlField> inet::ieee80211::QoSDuplicateRemoval::Key2SeqValMap

protected

typedef std::map<MACAddress, SequenceControlField> inet::ieee80211::QoSDuplicateRemoval::Mac2SeqValMap

protected

Member Function Documentation

bool inet::ieee80211::QoSDuplicateRemoval::isDuplicate ( Ieee80211DataOrMgmtFrame *  frame )

overridevirtual

Implements inet::ieee80211::IDuplicateRemoval.

{
    SequenceControlField seqVal(frame);
    bool isManagementFrame = dynamic_cast<Ieee80211ManagementFrame *>(frame);
    bool isTimePriorityManagementFrame = isManagementFrame && false; // TODO: hack
    if (isTimePriorityManagementFrame || isManagementFrame)
    {
        MACAddress transmitterAddr = frame->getTransmitterAddress();
        Mac2SeqValMap& cache = isTimePriorityManagementFrame ? lastSeenTimePriorityManagementSeqNumCache : lastSeenSharedSeqNumCache;
        auto it = cache.find(transmitterAddr);
        if (it == cache.end()) {
            cache.insert(std::pair<MACAddress, SequenceControlField>(transmitterAddr, seqVal));
            return false;
        }
        else if (it->second.getSequenceNumber() == seqVal.getSequenceNumber() && it->second.getFragmentNumber() == seqVal.getFragmentNumber() && frame->getRetry())
            return true;
        else {
            it->second = seqVal;
            return false;
        }
    }
    else
    {
        Ieee80211DataFrame *qosDataFrame = check_and_cast<Ieee80211DataFrame *>(frame);
        Key key(frame->getTransmitterAddress(), qosDataFrame->getTid());
        auto it = lastSeenSeqNumCache.find(key);
        if (it == lastSeenSeqNumCache.end()) {
            lastSeenSeqNumCache.insert(std::pair<Key, SequenceControlField>(key, seqVal));
            return false;
        }
        else if (it->second.getSequenceNumber() == seqVal.getSequenceNumber() && it->second.getFragmentNumber() == seqVal.getFragmentNumber() && frame->getRetry())
            return true;
        else {
            it->second = seqVal;
            return false;
        }
    }
}

Member Data Documentation

Key2SeqValMap inet::ieee80211::QoSDuplicateRemoval::lastSeenSeqNumCache

protected

Referenced by isDuplicate().

Mac2SeqValMap inet::ieee80211::QoSDuplicateRemoval::lastSeenSharedSeqNumCache

protected

Referenced by isDuplicate().

Mac2SeqValMap inet::ieee80211::QoSDuplicateRemoval::lastSeenTimePriorityManagementSeqNumCache

protected

Referenced by isDuplicate().

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The documentation for this class was generated from the following files:

• QosDuplicateRemoval.h
• QosDuplicateRemoval.cc