diff options
Diffstat (limited to 'src/net_processing.h')
| -rw-r--r-- | src/net_processing.h | 221 |
1 files changed, 19 insertions, 202 deletions
diff --git a/src/net_processing.h b/src/net_processing.h index 322fabbe11..eaa3b142a8 100644 --- a/src/net_processing.h +++ b/src/net_processing.h @@ -6,19 +6,13 @@ #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; @@ -39,216 +33,39 @@ struct CNodeStateStats { std::vector<int> vHeightInFlight; }; -/** - * Data structure for an individual peer. This struct is not protected by - * cs_main since it does not contain validation-critical data. - * - * Memory is owned by shared pointers and this object is destructed when - * the refcount drops to zero. - * - * Mutexes inside this struct must not be held when locking m_peer_mutex. - * - * TODO: move most members from CNodeState to this structure. - * TODO: move remaining application-layer data members from CNode to this structure. - */ -struct Peer { - /** Same id as the CNode object for this peer */ - const NodeId m_id{0}; - - /** Protects misbehavior data members */ - Mutex m_misbehavior_mutex; - /** Accumulated misbehavior score for this peer */ - int m_misbehavior_score GUARDED_BY(m_misbehavior_mutex){0}; - /** Whether this peer should be disconnected and marked as discouraged (unless it has the noban permission). */ - bool m_should_discourage GUARDED_BY(m_misbehavior_mutex){false}; - - /** Protects block inventory data members */ - Mutex m_block_inv_mutex; - /** List of blocks that we'll announce via an `inv` message. - * There is no final sorting before sending, as they are always sent - * immediately and in the order requested. */ - std::vector<uint256> m_blocks_for_inv_relay GUARDED_BY(m_block_inv_mutex); - /** Unfiltered list of blocks that we'd like to announce via a `headers` - * message. If we can't announce via a `headers` message, we'll fall back to - * announcing via `inv`. */ - std::vector<uint256> m_blocks_for_headers_relay GUARDED_BY(m_block_inv_mutex); - /** The final block hash that we sent in an `inv` message to this peer. - * When the peer requests this block, we send an `inv` message to trigger - * the peer to request the next sequence of block hashes. - * Most peers use headers-first syncing, which doesn't use this mechanism */ - uint256 m_continuation_block GUARDED_BY(m_block_inv_mutex) {}; - - /** This peer's reported block height when we connected */ - std::atomic<int> m_starting_height{-1}; - - /** Set of txids to reconsider once their parent transactions have been accepted **/ - std::set<uint256> m_orphan_work_set GUARDED_BY(g_cs_orphans); - - /** Protects m_getdata_requests **/ - Mutex m_getdata_requests_mutex; - /** Work queue of items requested by this peer **/ - std::deque<CInv> m_getdata_requests GUARDED_BY(m_getdata_requests_mutex); - - explicit Peer(NodeId id) : m_id(id) {} -}; - -using PeerRef = std::shared_ptr<Peer>; - -class PeerManager final : public CValidationInterface, public NetEventsInterface { +class PeerManager : public CValidationInterface, public NetEventsInterface +{ public: - PeerManager(const CChainParams& chainparams, CConnman& connman, BanMan* banman, - CScheduler& scheduler, ChainstateManager& chainman, CTxMemPool& pool, - bool ignore_incoming_txs); + static std::unique_ptr<PeerManager> make(const CChainParams& chainparams, CConnman& connman, BanMan* banman, + CScheduler& scheduler, ChainstateManager& chainman, CTxMemPool& pool, + bool ignore_incoming_txs); + virtual ~PeerManager() { } - /** - * 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); + /** Get statistics from node state */ + virtual bool GetNodeStateStats(NodeId nodeid, CNodeStateStats& stats) = 0; - /** 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; + /** Whether this node ignores txs received over p2p. */ + virtual bool IgnoresIncomingTxs() = 0; - /** 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); + /** Set the best height */ + virtual void SetBestHeight(int height) = 0; /** * 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); - - /** Get statistics from node state */ - bool GetNodeStateStats(NodeId nodeid, CNodeStateStats& stats); - - /** Set the best height */ - void SetBestHeight(int height) { m_best_height = height; }; - - /** Whether this node ignores txs received over p2p. */ - bool IgnoresIncomingTxs() { return m_ignore_incoming_txs; }; - -private: - /** 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 = ""); + virtual void Misbehaving(const NodeId pnode, const int howmuch, const std::string& message) = 0; /** - * 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 + * Evict extra outbound peers. If we think our tip may be stale, connect to an extra outbound. + * Public for unit testing. */ - bool MaybeDiscourageAndDisconnect(CNode& pnode); + virtual void CheckForStaleTipAndEvictPeers() = 0; - 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); + /** Process a single message from a peer. Public for fuzz testing */ + virtual void ProcessMessage(CNode& pfrom, const std::string& msg_type, CDataStream& vRecv, + const std::chrono::microseconds time_received, const std::atomic<bool>& interruptMsgProc) = 0; }; /** Relay transaction to every node */ |