git / moonbite-core / src/net_processing.h · raw

// Copyright (c) 2009-2010 Satoshi Nakamoto// Copyright (c) 2009-2020 The Bitcoin Core developers// Distributed under the MIT software license, see the accompanying// file COPYING or http://www.opensource.org/licenses/mit-license.php.#ifndef BITCOIN_NET_PROCESSING_H#define BITCOIN_NET_PROCESSING_H#include <consensus/params.h>#include <net.h>#include <sync.h>#include <txrequest.h>#include <validationinterface.h>class BlockTransactionsRequest;class BlockValidationState;class CBlockHeader;class CChainParams;class CTxMemPool;class ChainstateManager;class TxValidationState;extern RecursiveMutex cs_main;extern RecursiveMutex g_cs_orphans;/** Default for -maxorphantx, maximum number of orphan transactions kept in memory */static const unsigned int DEFAULT_MAX_ORPHAN_TRANSACTIONS = 100;/** Default number of orphan+recently-replaced txn to keep around for block reconstruction */static const unsigned int DEFAULT_BLOCK_RECONSTRUCTION_EXTRA_TXN = 100;static const bool DEFAULT_PEERBLOOMFILTERS = false;static const bool DEFAULT_PEERBLOCKFILTERS = true;/** Threshold for marking a node to be discouraged, e.g. disconnected and added to the discouragement filter. */static const int DISCOURAGEMENT_THRESHOLD{100};class PeerManager final : public CValidationInterface, public NetEventsInterface {public:    PeerManager(const CChainParams& chainparams, CConnman& connman, BanMan* banman,                CScheduler& scheduler, ChainstateManager& chainman, CTxMemPool& pool);    /**     * Overridden from CValidationInterface.     */    void BlockConnected(const std::shared_ptr<const CBlock>& pblock, const CBlockIndex* pindexConnected) override;    void BlockDisconnected(const std::shared_ptr<const CBlock> &block, const CBlockIndex* pindex) override;    /**     * Overridden from CValidationInterface.     */    void UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockIndex *pindexFork, bool fInitialDownload) override;    /**     * Overridden from CValidationInterface.     */    void BlockChecked(const CBlock& block, const BlockValidationState& state) override;    /**     * Overridden from CValidationInterface.     */    void NewPoWValidBlock(const CBlockIndex *pindex, const std::shared_ptr<const CBlock>& pblock) override;    /** Initialize a peer by adding it to mapNodeState and pushing a message requesting its version */    void InitializeNode(CNode* pnode) override;    /** Handle removal of a peer by updating various state and removing it from mapNodeState */    void FinalizeNode(const CNode& node, bool& fUpdateConnectionTime) override;    /**    * Process protocol messages received from a given node    *    * @param[in]   pfrom           The node which we have received messages from.    * @param[in]   interrupt       Interrupt condition for processing threads    */    bool ProcessMessages(CNode* pfrom, std::atomic<bool>& interrupt) override;    /**    * Send queued protocol messages to be sent to a give node.    *    * @param[in]   pto             The node which we are sending messages to.    * @return                      True if there is more work to be done    */    bool SendMessages(CNode* pto) override EXCLUSIVE_LOCKS_REQUIRED(pto->cs_sendProcessing);    /** Consider evicting an outbound peer based on the amount of time they've been behind our tip */    void ConsiderEviction(CNode& pto, int64_t time_in_seconds) EXCLUSIVE_LOCKS_REQUIRED(cs_main);    /** Evict extra outbound peers. If we think our tip may be stale, connect to an extra outbound */    void CheckForStaleTipAndEvictPeers();    /** If we have extra outbound peers, try to disconnect the one with the oldest block announcement */    void EvictExtraOutboundPeers(int64_t time_in_seconds) EXCLUSIVE_LOCKS_REQUIRED(cs_main);    /** Retrieve unbroadcast transactions from the mempool and reattempt sending to peers */    void ReattemptInitialBroadcast(CScheduler& scheduler) const;    /** Process a single message from a peer. Public for fuzz testing */    void ProcessMessage(CNode& pfrom, const std::string& msg_type, CDataStream& vRecv,                        const std::chrono::microseconds time_received, const std::atomic<bool>& interruptMsgProc);    /**     * Increment peer's misbehavior score. If the new value >= DISCOURAGEMENT_THRESHOLD, mark the node     * to be discouraged, meaning the peer might be disconnected and added to the discouragement filter.     * Public for unit testing.     */    void Misbehaving(const NodeId pnode, const int howmuch, const std::string& message);private:    /**     * Potentially mark a node discouraged based on the contents of a BlockValidationState object     *     * @param[in] via_compact_block this bool is passed in because net_processing should     * punish peers differently depending on whether the data was provided in a compact     * block message or not. If the compact block had a valid header, but contained invalid     * txs, the peer should not be punished. See BIP 152.     *     * @return Returns true if the peer was punished (probably disconnected)     */    bool MaybePunishNodeForBlock(NodeId nodeid, const BlockValidationState& state,                                 bool via_compact_block, const std::string& message = "");    /**     * Potentially disconnect and discourage a node based on the contents of a TxValidationState object     *     * @return Returns true if the peer was punished (probably disconnected)     */    bool MaybePunishNodeForTx(NodeId nodeid, const TxValidationState& state, const std::string& message = "");    /** Maybe disconnect a peer and discourage future connections from its address.     *     * @param[in]   pnode     The node to check.     * @return                True if the peer was marked for disconnection in this function     */    bool MaybeDiscourageAndDisconnect(CNode& pnode);    void ProcessOrphanTx(std::set<uint256>& orphan_work_set) EXCLUSIVE_LOCKS_REQUIRED(cs_main, g_cs_orphans);    /** Process a single headers message from a peer. */    void ProcessHeadersMessage(CNode& pfrom, const std::vector<CBlockHeader>& headers, bool via_compact_block);    void SendBlockTransactions(CNode& pfrom, const CBlock& block, const BlockTransactionsRequest& req);    /** Register with TxRequestTracker that an INV has been received from a     *  peer. The announcement parameters are decided in PeerManager and then     *  passed to TxRequestTracker. */    void AddTxAnnouncement(const CNode& node, const GenTxid& gtxid, std::chrono::microseconds current_time)        EXCLUSIVE_LOCKS_REQUIRED(::cs_main);    const CChainParams& m_chainparams;    CConnman& m_connman;    /** Pointer to this node's banman. May be nullptr - check existence before dereferencing. */    BanMan* const m_banman;    ChainstateManager& m_chainman;    CTxMemPool& m_mempool;    TxRequestTracker m_txrequest GUARDED_BY(::cs_main);    int64_t m_stale_tip_check_time; //!< Next time to check for stale tip};struct CNodeStateStats {    int m_misbehavior_score = 0;    int nSyncHeight = -1;    int nCommonHeight = -1;    std::vector<int> vHeightInFlight;    uint64_t m_addr_processed = 0;    uint64_t m_addr_rate_limited = 0;};/** Get statistics from node state */bool GetNodeStateStats(NodeId nodeid, CNodeStateStats &stats);/** Relay transaction to every node */void RelayTransaction(const uint256& txid, const uint256& wtxid, const CConnman& connman) EXCLUSIVE_LOCKS_REQUIRED(cs_main);#endif // BITCOIN_NET_PROCESSING_H