inet::ieee80211::QoSDuplicateRemoval Class Reference

#include <QosDuplicateRemoval.h>

Inheritance diagram for inet::ieee80211::QoSDuplicateRemoval:

Public Member Functions
virtual bool	isDuplicate (const Ptr< const Ieee80211DataOrMgmtHeader > &header) 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

Key

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

protected

Key2SeqValMap

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

protected

Mac2SeqValMap

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

protected

Member Function Documentation

isDuplicate()

bool inet::ieee80211::QoSDuplicateRemoval::isDuplicate ( const Ptr< const Ieee80211DataOrMgmtHeader > &  header )

overridevirtual

Implements inet::ieee80211::IDuplicateRemoval.

{
    SequenceControlField seqVal(header->getSequenceNumber().get(), header->getFragmentNumber());
    bool isManagementFrame = dynamicPtrCast<const Ieee80211MgmtHeader>(header) != nullptr;
    bool isTimePriorityManagementFrame = isManagementFrame && false; // TODO hack
    if (isTimePriorityManagementFrame || isManagementFrame) {
        MacAddress transmitterAddr = header->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() && header->getRetry())
            return true;
        else {
            it->second = seqVal;
            return false;
        }
    }
    else {
        const Ptr<const Ieee80211DataHeader>& qosDataHeader = dynamicPtrCast<const Ieee80211DataHeader>(header);
        Key key(header->getTransmitterAddress(), qosDataHeader->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() && header->getRetry())
            return true;
        else {
            it->second = seqVal;
            return false;
        }
    }
}

Member Data Documentation

lastSeenSeqNumCache

Key2SeqValMap inet::ieee80211::QoSDuplicateRemoval::lastSeenSeqNumCache

protected

Referenced by isDuplicate().

lastSeenSharedSeqNumCache

Mac2SeqValMap inet::ieee80211::QoSDuplicateRemoval::lastSeenSharedSeqNumCache

protected

Referenced by isDuplicate().

lastSeenTimePriorityManagementSeqNumCache

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