router2_basic_nat.h

// Copyright 2025 The Aerospace Corporation.
// This file is a part of SatCat5, licensed under CERN-OHL-W v2 or later.
// Basic Network Address Translation (NAT) for the IPv4 router.
 
#pragma once
 
#include <satcat5/eth_plugin.h>
#include <satcat5/ip_core.h>
 
namespace satcat5 {
    namespace router2 {
        class BasicNat : public satcat5::eth::PluginPort {
        public:
            explicit BasicNat(satcat5::eth::SwitchPort* port);
 
            bool config(
                const satcat5::ip::Subnet& ip_ext,
                const satcat5::ip::Subnet& ip_int);
 
        protected:
            // Override plugin callbacks.
            void ingress(satcat5::eth::PluginPacket& pkt) override;
            void egress(satcat5::eth::PluginPacket& pkt) override;
 
            // NAT configuration.
            satcat5::ip::Subnet m_ext, m_int;
        };
    }
}