sitara_depot/components/free_rtos/ethernet_ip/eth_arp.hpp

/*
 * eth_arp.hpp
 *
 *  Created on: 13 мар. 2023 г.
 *      Author: sychev
 */

#ifndef FREE_RTOS_ETHERNET_IP_ETH_ARP_HPP_
#define FREE_RTOS_ETHERNET_IP_ETH_ARP_HPP_

#include <map>
#include <cstdint>
#include "free_rtos/ethernet_ip/eth_arp_iface.hpp"
#include "free_rtos/ethernet_ip/eth_stack_iface.hpp"
#include "free_rtos/handler_store/handler.hpp"
#include "free_rtos/clock/clock.hpp"
#include "free_rtos/timer_sw/timer_sw.hpp"


namespace free_rtos {

class EthArp : public Handler, public EthArpIface {
public:
    EthArp(EthStackIface& eth_stack);

    bool init(TEthMacPorts eth_port_id, uint64_t self_mac, uint32_t self_ip);

    bool getIpAddr(uint64_t mac, uint32_t& ip);

    virtual bool getMacAddr(uint32_t ip, uint64_t& mac) override;

    bool try_request(uint32_t ip);

    virtual int32_t Process(uint8_t * p_data, uint32_t len) override;
    virtual uint16_t Sender(HandlerArgs& handlerArgs, size_t scatter_segment) override;
private:
    bool request(uint32_t ip);

    void add(uint64_t mac, uint32_t ip);

    void init_request_pkt(uint64_t self_mac, uint32_t self_ip);

    friend void clock_timeout(ClockP_Object * obj, void * arg);
private:
    enum Operations {
        e_oprRequest,
        e_oprReply,
        e_oprTotal
    };

    struct ArpIpReqData {
        uint64_t mac = 0;
        uint32_t attemps = 0;
        TimerSw tmr;
    };

    static const uint32_t pkt_len = 42;
    const uint16_t arp_opr_be_[e_oprTotal] = {0x0100, 0x0200};
    const uint32_t max_attemps_ = 8;

    TEthPkt request_pkt_;

    std::map<uint64_t, uint32_t>     table_mac_;
    std::map<uint32_t, ArpIpReqData> table_ip_;

    uint64_t self_mac_;
    uint32_t self_ip_;

    TEthMacPorts eth_port_id_;

    EthStackIface& eth_stack_;

    Clock clock_;

    TimerSw tmrGratuitous_;
};

}

#endif /* FREE_RTOS_ETHERNET_IP_ETH_ARP_HPP_ */