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50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
#pragma once
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#include <llarp/net/net_int.hpp>
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#include <llarp/net/ip_packet.hpp>
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#include <functional>
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#include <unordered_map>
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namespace llarp::vpn
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{
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using PacketHandlerFunc_t = std::function<void(llarp::net::IPPacket)>;
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struct Layer4Handler;
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class PacketRouter
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{
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PacketHandlerFunc_t m_BaseHandler;
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std::unordered_map<uint8_t, std::unique_ptr<Layer4Handler>> m_IPProtoHandler;
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public:
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/// baseHandler will be called if no other handlers matches a packet
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explicit PacketRouter(PacketHandlerFunc_t baseHandler);
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/// feed in an ip packet for handling
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void
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HandleIPPacket(llarp::net::IPPacket pkt);
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/// add a non udp packet handler using ip protocol proto
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void
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AddIProtoHandler(uint8_t proto, PacketHandlerFunc_t func);
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/// helper that adds a udp packet handler for UDP destinted for localport
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void
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AddUDPHandler(huint16_t localport, PacketHandlerFunc_t func);
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/// remove a udp handler that is already set up by bound port
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void
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RemoveUDPHandler(huint16_t localport);
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};
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struct Layer4Handler
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{
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virtual ~Layer4Handler() = default;
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virtual void
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HandleIPPacket(llarp::net::IPPacket pkt) = 0;
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virtual void AddSubHandler(nuint16_t, PacketHandlerFunc_t){};
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};
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} // namespace llarp::vpn
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