net_processing: move PeerManagerImpl into cpp file

1 files changed, 126 insertions, 0 deletions

diff --git a/src/net_processing.cpp b/src/net_processing.cpp
index bfa654af11..94e092592b 100644
--- a/src/net_processing.cpp
+++ b/src/net_processing.cpp
@@ -26,6 +26,7 @@
 #include <streams.h>
 #include <tinyformat.h>
 #include <txmempool.h>
+#include <txrequest.h>
 #include <util/check.h> // For NDEBUG compile time check
 #include <util/strencodings.h>
 #include <util/system.h>
@@ -168,6 +169,131 @@ void EraseOrphansFor(NodeId peer);
 
 // Internal stuff
 namespace {
+class PeerManagerImpl final : public PeerManager
+{
+public:
+    PeerManagerImpl(const CChainParams& chainparams, CConnman& connman, BanMan* banman,
+                    CScheduler& scheduler, ChainstateManager& chainman, CTxMemPool& pool,
+                    bool ignore_incoming_txs);
+
+    /** 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;
+    void UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockIndex *pindexFork, bool fInitialDownload) override;
+    void BlockChecked(const CBlock& block, const BlockValidationState& state) override;
+    void NewPoWValidBlock(const CBlockIndex *pindex, const std::shared_ptr<const CBlock>& pblock) override;
+
+    /** Implement NetEventsInterface */
+    void InitializeNode(CNode* pnode) override;
+    void FinalizeNode(const CNode& node, bool& fUpdateConnectionTime) override;
+    bool ProcessMessages(CNode* pfrom, std::atomic<bool>& interrupt) override;
+    bool SendMessages(CNode* pto) override EXCLUSIVE_LOCKS_REQUIRED(pto->cs_sendProcessing);
+
+    /** Implement PeerManager */
+    void CheckForStaleTipAndEvictPeers() override;
+    bool GetNodeStateStats(NodeId nodeid, CNodeStateStats& stats) override;
+    bool IgnoresIncomingTxs() override { return m_ignore_incoming_txs; }
+    void SetBestHeight(int height) override { m_best_height = height; };
+    void Misbehaving(const NodeId pnode, const int howmuch, const std::string& message) override;
+    void ProcessMessage(CNode& pfrom, const std::string& msg_type, CDataStream& vRecv,
+                        const std::chrono::microseconds time_received, const std::atomic<bool>& interruptMsgProc) override;
+
+private:
+    /** 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);
+
+    /** 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;
+
+    /** Get a shared pointer to the Peer object.
+     *  May return an empty shared_ptr if the Peer object can't be found. */
+    PeerRef GetPeerRef(NodeId id) const;
+
+    /** Get a shared pointer to the Peer object and remove it from m_peer_map.
+     *  May return an empty shared_ptr if the Peer object can't be found. */
+    PeerRef RemovePeer(NodeId id);
+
+    /**
+     * 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 Peer& peer,
+                               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);
+
+    /** Send a version message to a peer */
+    void PushNodeVersion(CNode& pnode, int64_t nTime);
+
+    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);
+
+    /** The height of the best chain */
+    std::atomic<int> m_best_height{-1};
+
+    int64_t m_stale_tip_check_time; //!< Next time to check for stale tip
+
+    /** Whether this node is running in blocks only mode */
+    const bool m_ignore_incoming_txs;
+
+    /** Whether we've completed initial sync yet, for determining when to turn
+      * on extra block-relay-only peers. */
+    bool m_initial_sync_finished{false};
+
+    /** Protects m_peer_map. This mutex must not be locked while holding a lock
+     *  on any of the mutexes inside a Peer object. */
+    mutable Mutex m_peer_mutex;
+    /**
+     * Map of all Peer objects, keyed by peer id. This map is protected
+     * by the m_peer_mutex. Once a shared pointer reference is
+     * taken, the lock may be released. Individual fields are protected by
+     * their own locks.
+     */
+    std::map<NodeId, PeerRef> m_peer_map GUARDED_BY(m_peer_mutex);
+};
+} // namespace
+
+namespace {
     /** Number of nodes with fSyncStarted. */
     int nSyncStarted GUARDED_BY(cs_main) = 0;