udp_keep_alive.h

// Copyright 2025 The Aerospace Corporation.
// This file is a part of SatCat5, licensed under CERN-OHL-W v2 or later.
// Send and receive keep-alive messages.
 
#pragma once
#include <satcat5/udp_core.h>
 
namespace satcat5 {
    namespace udp {
        class KeepAlive
            : public satcat5::net::Protocol
            , public satcat5::poll::Timer {
        public:
            explicit KeepAlive(
                satcat5::udp::Dispatch* iface,
                satcat5::udp::Port port,
                const char* label = nullptr);
            ~KeepAlive();
 
            void connect(
                const satcat5::ip::Addr& dstaddr,
                const satcat5::eth::VlanTag& vtag = satcat5::eth::VTAG_NONE);
 
            void send_now(const char* msg);
 
        protected:
            void frame_rcvd(satcat5::io::LimitedRead& src) override;
            void timer_event() override;
 
            satcat5::udp::Address m_addr;
            const char* const m_label;
        };
    }
}