src/net_processing.h

   1 // Copyright (c) 2009-2010 Satoshi Nakamoto
   2 // Copyright (c) 2009-2017 The Bitcoin Core developers
   3 // Distributed under the MIT software license, see the accompanying
   4 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   5
   6 #ifndef BITCOIN_NET_PROCESSING_H
   7 #define BITCOIN_NET_PROCESSING_H
   8
   9 #include <net.h>
  10 #include <validationinterface.h>
  11 #include <consensus/params.h>
  12
  13 /** Default for -maxorphantx, maximum number of orphan transactions kept in memory */
  14 static const unsigned int DEFAULT_MAX_ORPHAN_TRANSACTIONS = 100;
  15 /** Expiration time for orphan transactions in seconds */
  16 static const int64_t ORPHAN_TX_EXPIRE_TIME = 20 * 60;
  17 /** Minimum time between orphan transactions expire time checks in seconds */
  18 static const int64_t ORPHAN_TX_EXPIRE_INTERVAL = 5 * 60;
  19 /** Default number of orphan+recently-replaced txn to keep around for block reconstruction */
  20 static const unsigned int DEFAULT_BLOCK_RECONSTRUCTION_EXTRA_TXN = 100;
  21 /** Headers download timeout expressed in microseconds
  22  *  Timeout = base + per_header * (expected number of headers) */
  23 static constexpr int64_t HEADERS_DOWNLOAD_TIMEOUT_BASE = 15 * 60 * 1000000; // 15 minutes
  24 static constexpr int64_t HEADERS_DOWNLOAD_TIMEOUT_PER_HEADER = 1000; // 1ms/header
  25 /** Protect at least this many outbound peers from disconnection due to slow/
  26  * behind headers chain.
  27  */
  28 static constexpr int32_t MAX_OUTBOUND_PEERS_TO_PROTECT_FROM_DISCONNECT = 4;
  29 /** Timeout for (unprotected) outbound peers to sync to our chainwork, in seconds */
  30 static constexpr int64_t CHAIN_SYNC_TIMEOUT = 20 * 60; // 20 minutes
  31 /** How frequently to check for stale tips, in seconds */
  32 static constexpr int64_t STALE_CHECK_INTERVAL = 10 * 60; // 10 minutes
  33 /** How frequently to check for extra outbound peers and disconnect, in seconds */
  34 static constexpr int64_t EXTRA_PEER_CHECK_INTERVAL = 45;
  35 /** Minimum time an outbound-peer-eviction candidate must be connected for, in order to evict, in seconds */
  36 static constexpr int64_t MINIMUM_CONNECT_TIME = 30;
  37
  38 class PeerLogicValidation : public CValidationInterface, public NetEventsInterface {
  39 private:
  40     CConnman* const connman;
  41
  42 public:
  43     explicit PeerLogicValidation(CConnman* connman, CScheduler &scheduler);
  44
  45     void BlockConnected(const std::shared_ptr<const CBlock>& pblock, const CBlockIndex* pindexConnected, const std::vector<CTransactionRef>& vtxConflicted) override;
  46     void UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockIndex *pindexFork, bool fInitialDownload) override;
  47     void BlockChecked(const CBlock& block, const CValidationState& state) override;
  48     void NewPoWValidBlock(const CBlockIndex *pindex, const std::shared_ptr<const CBlock>& pblock) override;
  49
  50
  51     void InitializeNode(CNode* pnode) override;
  52     void FinalizeNode(NodeId nodeid, bool& fUpdateConnectionTime) override;
  53     /** Process protocol messages received from a given node */
  54     bool ProcessMessages(CNode* pfrom, std::atomic<bool>& interrupt) override;
  55     /**
  56     * Send queued protocol messages to be sent to a give node.
  57     *
  58     * @param[in]   pto             The node which we are sending messages to.
  59     * @param[in]   interrupt       Interrupt condition for processing threads
  60     * @return                      True if there is more work to be done
  61     */
  62     bool SendMessages(CNode* pto, std::atomic<bool>& interrupt) override;
  63
  64     void ConsiderEviction(CNode *pto, int64_t time_in_seconds);
  65     void CheckForStaleTipAndEvictPeers(const Consensus::Params &consensusParams);
  66     void EvictExtraOutboundPeers(int64_t time_in_seconds);
  67
  68 private:
  69     int64_t m_stale_tip_check_time; //! Next time to check for stale tip
  70 };
  71
  72 struct CNodeStateStats {
  73     int nMisbehavior;
  74     int nSyncHeight;
  75     int nCommonHeight;
  76     std::vector<int> vHeightInFlight;
  77 };
  78
  79 /** Get statistics from node state */
  80 bool GetNodeStateStats(NodeId nodeid, CNodeStateStats &stats);
  81 /** Increase a node's misbehavior score. */
  82 void Misbehaving(NodeId nodeid, int howmuch);
  83
  84 #endif // BITCOIN_NET_PROCESSING_H