mirror of https://github.com/oxen-io/lokinet
87 lines
2.3 KiB
C++
87 lines
2.3 KiB
C++
#ifndef LLARP_IWP_OUTERMESSAGE_HPP
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#define LLARP_IWP_OUTERMESSAGE_HPP
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#include <crypto/types.hpp>
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#include <router_contact.hpp>
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#include <util/aligned.hpp>
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#include <array>
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namespace llarp
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{
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namespace iwp
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{
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using FlowID_t = AlignedBuffer< 32 >;
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using OuterCommand_t = byte_t;
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constexpr OuterCommand_t eOCMD_ObtainFlowID = 'O';
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constexpr OuterCommand_t eOCMD_GiveFlowID = 'G';
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constexpr OuterCommand_t eOCMD_Reject = 'R';
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constexpr OuterCommand_t eOCMD_SessionNegotiate = 'S';
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constexpr OuterCommand_t eOCMD_TransmitData = 'D';
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using InnerCommand_t = byte_t;
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constexpr InnerCommand_t eICMD_KeepAlive = 'k';
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constexpr InnerCommand_t eICMD_KeepAliveAck = 'l';
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constexpr InnerCommand_t eICMD_Congestion = 'c';
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constexpr InnerCommand_t eICMD_AntiCongestion = 'd';
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constexpr InnerCommand_t eICMD_Transmit = 't';
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constexpr InnerCommand_t eICMD_Ack = 'a';
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constexpr InnerCommand_t eICMD_RotateKeys = 'r';
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constexpr InnerCommand_t eICMD_UpgradeProtocol = 'u';
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constexpr InnerCommand_t eICMD_VersionUpgrade = 'v';
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struct OuterMessage
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{
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// required members
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byte_t command;
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FlowID_t flow;
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OuterMessage();
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~OuterMessage();
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// static members
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static std::array< byte_t, 6 > obtain_flow_id_magic;
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static std::array< byte_t, 6 > give_flow_id_magic;
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void
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CreateReject(const char *msg, llarp_time_t now, const PubKey &pk);
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// optional members follow
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std::array< byte_t, 6 > magic;
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NetID netid;
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// either timestamp or counter
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uint64_t uinteger;
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std::array< byte_t, 14 > reject;
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AlignedBuffer< 24 > N;
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PubKey pubkey;
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std::unique_ptr< AlignedBuffer< 32 > > A;
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static constexpr size_t ipv6_mtu = 1280;
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static constexpr size_t overhead_size = 16 + 24 + 32;
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static constexpr size_t payload_size = ipv6_mtu - overhead_size;
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AlignedBuffer< payload_size > X;
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size_t Xsize;
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ShortHash Zhash;
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Signature Zsig;
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/// encode to buffer
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bool
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Encode(llarp_buffer_t *buf) const;
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/// decode from buffer
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bool
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Decode(llarp_buffer_t *buf);
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/// clear members
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void
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Clear();
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};
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} // namespace iwp
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} // namespace llarp
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#endif
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