114 lines
3.8 KiB
C++
114 lines
3.8 KiB
C++
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#include "face/face.hpp"
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#include "fw/strategy.hpp"
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#include "fw/algorithm.hpp"
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#include "fw/process-nack-traits.hpp"
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#include <unordered_map>
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#include <limits>
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#include <deque>
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#include "ndn-cxx/lp/tags.hpp"
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#include "common/global.hpp"
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#include "ns3/simulator.h"
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namespace nfd {
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namespace fw {
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class MIRCCQueue
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{
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public:
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std:: deque<shared_ptr<Interest>> qp,qs;
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//记录的是过期时间，非达到时间
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std:: deque<time::steady_clock::TimePoint> tp,ts;
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std:: deque<shared_ptr<pit::Entry>> pp,ps;
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};
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/*
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MIRCC 策略实现
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*/
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class MIRCCStrategy : public Strategy, public ProcessNackTraits<MIRCCStrategy>
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{
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public:
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explicit MIRCCStrategy(Forwarder &forwarder, const ndn::Name &name);
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~MIRCCStrategy() override = default;
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void
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afterReceiveInterest(const FaceEndpoint &ingress, const Interest &interest,const shared_ptr<pit::Entry> &pitEntry) override;
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void
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afterReceiveNack(const FaceEndpoint &ingress, const lp::Nack &nack,const shared_ptr<pit::Entry> &pitEntry) override;
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void
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beforeSatisfyInterest(const shared_ptr<pit::Entry> &pitEntry,const FaceEndpoint &ingress, const Data &data) override;
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void
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afterReceiveData(const shared_ptr<pit::Entry> &pitEntry,const FaceEndpoint &ingress, const Data &data) override;
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static const Name &
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getStrategyName();
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protected:
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friend ProcessNackTraits<MIRCCStrategy>;
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private:
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static const uint64_t MAX_FACE = 10;//单一节点最多支持10个外部端口,涉及到hash的计算
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const uint64_t DATA_SIZE = 8696;//固定数据包大小
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const uint64_t MAX_QUEUE = 10;//固定队列大小
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const double m_B = 0.1;//公式B系数
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const double m_a = 0.5;//速率更新系数
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const double m_miu = 0.95;//链路利用率
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const double m_rtt_a = 0.7;//RTT更新系数
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uint64_t m_Rp_base[MAX_FACE];//Rp的base速率
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uint64_t m_Rp_ex[MAX_FACE];//Rp的ex速率
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uint64_t m_Rs_base[MAX_FACE];//Rs的base速率
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uint64_t m_Rs_ex[MAX_FACE];//Rs的ex速率
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uint64_t m_Yp[MAX_FACE];//本周期的Yp(t)
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uint64_t m_Yp_old[MAX_FACE];//上一个周期的Yp(t)
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uint64_t m_Ys[MAX_FACE];//本周起的Ys(t)
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uint64_t m_Ys_old[MAX_FACE];//上一个周期的Ys(t)
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uint64_t m_linkC[MAX_FACE];//每一个链路的带宽,单位为比特
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double m_d[MAX_FACE];//维护每一个face的RTT 秒
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//注意，此处没有维护数据包/兴趣包，算法中采用固定的数据包大小
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MIRCCQueue m_Queue[MAX_FACE];//用于出口排队转发兴趣
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//发送mface端口1个正在排队的兴趣包，并设置下一次发送时间
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void
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sendQueueInterest(FaceId mface);
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//将兴趣包放入mface端口的队列
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void
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pushQueueInterest(FaceId mface, const shared_ptr<Interest>& interest,const shared_ptr<pit::Entry>& pitEntry);
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//计算并返回mface端口的q(t)
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uint64_t
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getQt(FaceId mface);
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//对于mface端口周期性计算Rt
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void
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calcRt(FaceId mface);
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//拖延1ns后进行初始化，避免发现端口失败
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void
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mirccinit();
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//将端口号映射至从0开始
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uint64_t
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inface(FaceId mface)
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{
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return mface - 257;
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}
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};
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}
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}
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