mirror of
https://github.com/PurpleI2P/i2pd
synced 2024-11-10 00:00:29 +03:00
128 lines
3.3 KiB
C++
128 lines
3.3 KiB
C++
#ifndef I2NP_PROTOCOL_H__
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#define I2NP_PROTOCOL_H__
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#include <inttypes.h>
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#include <vector>
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#include "RouterInfo.h"
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namespace i2p
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{
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#pragma pack (1)
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struct I2NPHeader
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{
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uint8_t typeID;
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uint32_t msgID;
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uint64_t expiration;
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uint16_t size;
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uint8_t chks;
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};
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struct I2NPDatabaseStoreMsg
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{
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uint8_t key[32];
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uint8_t type;
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uint32_t replyToken;
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uint16_t size;
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};
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struct I2NPBuildRequestRecordClearText
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{
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uint32_t receiveTunnel;
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uint8_t ourIdent[32];
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uint32_t nextTunnel;
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uint8_t nextIdent[32];
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uint8_t layerKey[32];
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uint8_t ivKey[32];
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uint8_t replyKey[32];
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uint8_t replyIV[16];
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uint8_t flag;
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uint32_t requestTime;
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uint32_t nextMessageID;
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uint8_t filler[29];
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};
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struct I2NPBuildResponseRecord
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{
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uint8_t hash[32];
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uint8_t padding[495];
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uint8_t ret;
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};
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struct I2NPBuildRequestRecordElGamalEncrypted
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{
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uint8_t toPeer[16];
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uint8_t encrypted[512];
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};
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struct TunnelGatewayHeader
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{
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uint32_t tunnelID;
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uint16_t length;
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};
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#pragma pack ()
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enum I2NPMessageType
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{
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eI2NPDatabaseStore = 1,
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eI2NPDatabaseLookup = 2,
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eI2NPDatabaseSearchReply = 3,
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eI2NPDeliveryStatus = 10,
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eI2NPGarlic = 11,
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eI2NPTunnelData = 18,
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eI2NPTunnelGateway = 19,
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eI2NPData = 20,
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eI2NPVariableTunnelBuild = 23,
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eI2NPVariableTunnelBuildReply = 24
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};
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const int NTCP_MAX_MESSAGE_SIZE = 16384;
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struct I2NPMessage
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{
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uint8_t buf[NTCP_MAX_MESSAGE_SIZE];
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size_t len, offset;
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I2NPHeader * GetHeader () { return (I2NPHeader *)(buf + offset); };
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uint8_t * GetPayload () { return buf + offset + sizeof(I2NPHeader); };
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uint8_t * GetBuffer () { return buf + offset; };
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size_t GetLength () const { return len - offset; };
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};
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I2NPMessage * NewI2NPMessage ();
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void DeleteI2NPMessage (I2NPMessage * msg);
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void FillI2NPMessageHeader (I2NPMessage * msg, I2NPMessageType msgType, uint32_t replyMsgID = 0);
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I2NPMessage * CreateI2NPMessage (I2NPMessageType msgType, const uint8_t * buf, int len, uint32_t replyMsgID = 0);
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I2NPMessage * CreateDeliveryStatusMsg ();
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I2NPMessage * CreateDatabaseLookupMsg (const uint8_t * key, const uint8_t * from, uint32_t replyTunnelID);
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I2NPMessage * CreateDatabaseStoreMsg ();
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void HandleDatabaseStoreMsg (uint8_t * buf, size_t len);
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void HandleDatabaseSearchReplyMsg (uint8_t * buf, size_t len);
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I2NPBuildRequestRecordClearText CreateBuildRequestRecord (
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const uint8_t * ourIdent, uint32_t receiveTunnelID,
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const uint8_t * nextIdent, uint32_t nextTunnelID,
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const uint8_t * layerKey,const uint8_t * ivKey,
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const uint8_t * replyKey, const uint8_t * replyIV, uint32_t nextMessageID,
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bool isGateway, bool isEndpoint);
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void EncryptBuildRequestRecord (const i2p::data::RouterInfo& router,
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const I2NPBuildRequestRecordClearText& clearText,
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I2NPBuildRequestRecordElGamalEncrypted& record);
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void HandleVariableTunnelBuildMsg (uint32_t replyMsgID, uint8_t * buf, size_t len);
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void HandleVariableTunnelBuildReplyMsg (uint32_t replyMsgID, uint8_t * buf, size_t len);
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I2NPMessage * CreateTunnelDataMsg (const uint8_t * buf);
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I2NPMessage * CreateTunnelDataMsg (uint32_t tunnelID, const uint8_t * payload);
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void HandleTunnelGatewayMsg (uint8_t * buf, size_t len);
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void HandleI2NPMessage (uint8_t * msg, size_t len);
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void HandleI2NPMessage (I2NPMessage * msg);
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}
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#endif
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