helloBye3.hpp

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#ifndef HELLOBYE3PROTO_HPP
#define HELLOBYE3PROTO_HPP

#include <mutex>
#include <sstream>

#include "common.hpp"
#include "exceptions.hpp"
#include "headers.hpp"
#include "mbuf.hpp"
#include "stateMachine.hpp"

namespace HelloBye3 {

struct __attribute__((packed)) msg {
    uint64_t ident;
    uint8_t role;
    uint8_t msg;
    uint8_t cookie;

    static constexpr uint8_t ROLE_CLIENT = 0;
    static constexpr uint8_t ROLE_SERVER = 1;

    static constexpr uint8_t MSG_HELLO = 0;
    static constexpr uint8_t MSG_BYE = 1;
};

/*
 * ===================================
 * Identifier
 * ===================================
 *
 */

// This is the same as in HelloBye2
template <typename Packet> class Identifier {
public:
    class ConnectionID {
    public:
        uint64_t ident;

        bool operator==(const ConnectionID &c) const { return ident == c.ident; };
        bool operator<(const ConnectionID &c) const { return ident < c.ident; };
        operator std::string() const {
            std::stringstream sstream;
            sstream << ident;
            return sstream.str();
        };
        ConnectionID(const ConnectionID &c) : ident(c.ident){};
        ConnectionID() : ident(0){};
        ConnectionID(uint64_t i) : ident(i){};
    };
    struct Hasher {
        uint64_t operator()(const ConnectionID &c) const { return c.ident; };
    };
    static ConnectionID identify(Packet *pkt) {
        Headers::Ethernet *eth = reinterpret_cast<Headers::Ethernet *>(pkt->getData());
        if (eth->getEthertype() != Headers::Ethernet::ETHERTYPE_IPv4) {
            throw new PacketNotIdentified();
        }

        Headers::IPv4 *ipv4 = reinterpret_cast<Headers::IPv4 *>(eth->getPayload());
        if (ipv4->proto != Headers::IPv4::PROTO_UDP) {
            throw new PacketNotIdentified();
        }

        Headers::Udp *udp = reinterpret_cast<Headers::Udp *>(ipv4->getPayload());

        struct msg *msg = reinterpret_cast<struct msg *>(udp->getPayload());
        return msg->ident;
    };
};

/*
 * ===================================
 * Forward declarations
 * ===================================
 *
 */

/*
 * ===================================
 * Server
 * ===================================
 *
 */

namespace Server {
struct server {
    int clientCookie;
    int serverCookie;
};
struct States {
    static constexpr StateID Hello = 0;
    static constexpr StateID Bye = 1;
    static constexpr StateID Terminate = 2;
};

void *factory(Identifier<mbuf>::ConnectionID id);

void runHello(StateMachine<Identifier<mbuf>, mbuf>::State &state, mbuf *pkt,
    StateMachine<Identifier<mbuf>, mbuf>::FunIface &funIface);

void runBye(StateMachine<Identifier<mbuf>, mbuf>::State &state, mbuf *pkt,
    StateMachine<Identifier<mbuf>, mbuf>::FunIface &funIface);

}; // namespace Server

/*
 * ===================================
 * Client
 * ===================================
 *
 */

namespace Client {
struct client {
    uint64_t ident;
    uint32_t srcIp;
    uint32_t dstIp;
    int clientCookie;
    int serverCookie;
    uint16_t srcPort;
    uint16_t dstPort;
};

struct States {
    static constexpr StateID Hello = 0;
    static constexpr StateID Bye = 1;
    static constexpr StateID RecvBye = 2;
    static constexpr StateID Terminate = 3;
};

StateMachine<Identifier<mbuf>, mbuf>::State createHello(
    uint32_t srcIp, uint32_t dstIp, uint16_t srcPort, uint16_t dstPort, uint64_t ident);

void runHello(StateMachine<Identifier<mbuf>, mbuf>::State &state, mbuf *pkt,
    StateMachine<Identifier<mbuf>, mbuf>::FunIface &funIface);

void runBye(StateMachine<Identifier<mbuf>, mbuf>::State &state, mbuf *pkt,
    StateMachine<Identifier<mbuf>, mbuf>::FunIface &funIface);

void runRecvBye(StateMachine<Identifier<mbuf>, mbuf>::State &state, mbuf *pkt,
    StateMachine<Identifier<mbuf>, mbuf>::FunIface &funIface);

} // namespace Client

}; // namespace HelloBye3

/*
 * From here on down is the C interface to the above C++ functions
 */

extern "C" {

/*
 * XXX -------------------------------------------- XXX
 *       Server
 * XXX -------------------------------------------- XXX
 */

void *HelloBye3_Server_init();

void *HelloBye3_Server_process(void *obj, struct rte_mbuf **inPkts, unsigned int inCount,
    unsigned int *sendCount, unsigned int *freeCount);

void HelloBye3_Server_getPkts(
    void *obj, struct rte_mbuf **sendPkts, struct rte_mbuf **freePkts);

void HelloBye3_Server_free(void *obj);

/*
 * XXX -------------------------------------------- XXX
 *       Client
 * XXX -------------------------------------------- XXX
 */

void *HelloBye3_Client_init();

void *HelloBye3_Client_connect(void *obj, struct rte_mbuf **inPkts, unsigned int inCount,
    unsigned int *sendCount, unsigned int *freeCount, uint32_t srcIP, uint32_t dstIP,
    uint16_t srcPort, uint16_t dstPort, uint64_t ident);

void HelloBye3_Client_getPkts(
    void *obj, struct rte_mbuf **sendPkts, struct rte_mbuf **freePkts);

void *HelloBye3_Client_process(void *obj, struct rte_mbuf **inPkts, unsigned int inCount,
    unsigned int *sendCount, unsigned int *freeCount);

void HelloBye3_Client_free(void *obj);
};

/*
 * YCM definition is a workaround for a libclang bug
 * When compiling, YCM should never be set.
 * Set YCM in a libclang based IDE in order to avoid errors
 */
#ifndef YCM
#include "../src/helloBye3.cpp"
#endif

#endif /* HELLOBYE3PROTO_HPP */