pcapBackend.hpp

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#ifdef WITH_PCAP

#ifndef PCAPBACKEND_HPP
#define PCAPBACKEND_HPP

#include <pcap.h>

#include <array>
#include <cassert>
#include <cerrno>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <string>

#include <net/ethernet.h>

#include "IPv4_5TupleL2Ident.hpp"
#include "bufArray.hpp"
#include "samplePacket.hpp"
#include "stateMachine.hpp"

class PcapBackend {
private:
    using TupleIdent = IPv4_5TupleL2Ident<SamplePacket>;

    pcap_t *handle;
    std::string dev;
    char errbuf[PCAP_ERRBUF_SIZE];
    //  StateMachine<TupleIdent, SamplePacket> &sm;

    static constexpr uint32_t bufSize = 2048;
    static constexpr unsigned int maxBufArraySize = 64;

    std::vector<SamplePacket *> packetPool;
    std::array<uint8_t, 6> srcMac;

public:
    // WARNING: THIS CLASS IS NOT THREAD SAFE
    PcapBackend(std::string dev,
        std::array<uint8_t, 6> srcMac //,
                                      // StateMachine<TupleIdent, SamplePacket> &sm
    );

    ~PcapBackend();

    void sendBatch(BufArray<SamplePacket> &pkts);
    void freeBatch(BufArray<SamplePacket> &pkts);

    BufArray<SamplePacket> *recvBatch();

    SamplePacket *getPkt();
};

#endif /* PCAPBACKEND_HPP */

#endif /* WITH_PCAP */