Bitcoin Core  22.99.0
P2P Digital Currency
net.h
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1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2009-2021 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_H
7 #define BITCOIN_NET_H
8 
9 #include <chainparams.h>
10 #include <common/bloom.h>
11 #include <compat.h>
12 #include <consensus/amount.h>
13 #include <crypto/siphash.h>
14 #include <hash.h>
15 #include <i2p.h>
16 #include <net_permissions.h>
17 #include <netaddress.h>
18 #include <netbase.h>
19 #include <policy/feerate.h>
20 #include <protocol.h>
21 #include <random.h>
22 #include <span.h>
23 #include <streams.h>
24 #include <sync.h>
25 #include <threadinterrupt.h>
26 #include <uint256.h>
27 #include <util/check.h>
28 #include <util/sock.h>
29 
30 #include <atomic>
31 #include <condition_variable>
32 #include <cstdint>
33 #include <deque>
34 #include <map>
35 #include <memory>
36 #include <optional>
37 #include <thread>
38 #include <vector>
39 
40 class AddrMan;
41 class BanMan;
42 class CNode;
43 class CScheduler;
44 struct bilingual_str;
45 
47 static const bool DEFAULT_WHITELISTRELAY = true;
49 static const bool DEFAULT_WHITELISTFORCERELAY = false;
50 
52 static constexpr std::chrono::minutes TIMEOUT_INTERVAL{20};
54 static constexpr auto FEELER_INTERVAL = 2min;
56 static constexpr auto EXTRA_BLOCK_RELAY_ONLY_PEER_INTERVAL = 5min;
58 static const unsigned int MAX_PROTOCOL_MESSAGE_LENGTH = 4 * 1000 * 1000;
60 static const unsigned int MAX_SUBVERSION_LENGTH = 256;
64 static const int MAX_ADDNODE_CONNECTIONS = 8;
66 static const int MAX_BLOCK_RELAY_ONLY_CONNECTIONS = 2;
68 static const int MAX_FEELER_CONNECTIONS = 1;
70 static const bool DEFAULT_LISTEN = true;
72 static const unsigned int DEFAULT_MAX_PEER_CONNECTIONS = 125;
74 static const std::string DEFAULT_MAX_UPLOAD_TARGET{"0M"};
76 static const bool DEFAULT_BLOCKSONLY = false;
78 static const int64_t DEFAULT_PEER_CONNECT_TIMEOUT = 60;
80 static const int NUM_FDS_MESSAGE_CAPTURE = 1;
81 
82 static constexpr bool DEFAULT_FORCEDNSSEED{false};
83 static constexpr bool DEFAULT_DNSSEED{true};
84 static constexpr bool DEFAULT_FIXEDSEEDS{true};
85 static const size_t DEFAULT_MAXRECEIVEBUFFER = 5 * 1000;
86 static const size_t DEFAULT_MAXSENDBUFFER = 1 * 1000;
87 
88 typedef int64_t NodeId;
89 
91 {
92  std::string strAddedNode;
94  bool fConnected;
95  bool fInbound;
96 };
97 
98 class CNodeStats;
99 class CClientUIInterface;
100 
102 {
103  CSerializedNetMsg() = default;
106  // No copying, only moves.
107  CSerializedNetMsg(const CSerializedNetMsg& msg) = delete;
109 
110  std::vector<unsigned char> data;
111  std::string m_type;
112 };
113 
121 enum class ConnectionType {
127  INBOUND,
128 
136 
137 
144  MANUAL,
145 
161  FEELER,
162 
172  BLOCK_RELAY,
173 
180  ADDR_FETCH,
181 };
182 
184 std::string ConnectionTypeAsString(ConnectionType conn_type);
185 void Discover();
186 uint16_t GetListenPort();
187 
188 enum
189 {
190  LOCAL_NONE, // unknown
191  LOCAL_IF, // address a local interface listens on
192  LOCAL_BIND, // address explicit bound to
193  LOCAL_MAPPED, // address reported by UPnP or NAT-PMP
194  LOCAL_MANUAL, // address explicitly specified (-externalip=)
195 
197 };
198 
199 bool IsPeerAddrLocalGood(CNode *pnode);
201 std::optional<CAddress> GetLocalAddrForPeer(CNode *pnode);
202 
207 void SetReachable(enum Network net, bool reachable);
209 bool IsReachable(enum Network net);
211 bool IsReachable(const CNetAddr& addr);
212 
213 bool AddLocal(const CService& addr, int nScore = LOCAL_NONE);
214 bool AddLocal(const CNetAddr& addr, int nScore = LOCAL_NONE);
215 void RemoveLocal(const CService& addr);
216 bool SeenLocal(const CService& addr);
217 bool IsLocal(const CService& addr);
218 bool GetLocal(CService &addr, const CNetAddr *paddrPeer = nullptr);
219 CAddress GetLocalAddress(const CNetAddr *paddrPeer, ServiceFlags nLocalServices);
220 
221 
222 extern bool fDiscover;
223 extern bool fListen;
224 
226 extern std::string strSubVersion;
227 
229  int nScore;
230  uint16_t nPort;
231 };
232 
234 extern std::map<CNetAddr, LocalServiceInfo> mapLocalHost GUARDED_BY(g_maplocalhost_mutex);
235 
236 extern const std::string NET_MESSAGE_COMMAND_OTHER;
237 typedef std::map<std::string, uint64_t> mapMsgCmdSize; //command, total bytes
238 
240 {
241 public:
245  std::chrono::seconds m_last_send;
246  std::chrono::seconds m_last_recv;
247  std::chrono::seconds m_last_tx_time;
248  std::chrono::seconds m_last_block_time;
249  std::chrono::seconds m_connected;
250  int64_t nTimeOffset;
251  std::string m_addr_name;
252  int nVersion;
253  std::string cleanSubVer;
254  bool fInbound;
258  uint64_t nSendBytes;
260  uint64_t nRecvBytes;
263  std::chrono::microseconds m_last_ping_time;
264  std::chrono::microseconds m_min_ping_time;
266  // Our address, as reported by the peer
267  std::string addrLocal;
268  // Address of this peer
270  // Bind address of our side of the connection
272  // Network the peer connected through
274  uint32_t m_mapped_as;
276 };
277 
278 
283 class CNetMessage {
284 public:
286  std::chrono::microseconds m_time{0};
287  uint32_t m_message_size{0};
288  uint32_t m_raw_message_size{0};
289  std::string m_type;
290 
291  CNetMessage(CDataStream&& recv_in) : m_recv(std::move(recv_in)) {}
292 
293  void SetVersion(int nVersionIn)
294  {
295  m_recv.SetVersion(nVersionIn);
296  }
297 };
298 
304 public:
305  // returns true if the current deserialization is complete
306  virtual bool Complete() const = 0;
307  // set the serialization context version
308  virtual void SetVersion(int version) = 0;
310  virtual int Read(Span<const uint8_t>& msg_bytes) = 0;
311  // decomposes a message from the context
312  virtual CNetMessage GetMessage(std::chrono::microseconds time, bool& reject_message) = 0;
314 };
315 
317 {
318 private:
320  const NodeId m_node_id; // Only for logging
321  mutable CHash256 hasher;
323  bool in_data; // parsing header (false) or data (true)
324  CDataStream hdrbuf; // partially received header
325  CMessageHeader hdr; // complete header
326  CDataStream vRecv; // received message data
327  unsigned int nHdrPos;
328  unsigned int nDataPos;
329 
330  const uint256& GetMessageHash() const;
331  int readHeader(Span<const uint8_t> msg_bytes);
332  int readData(Span<const uint8_t> msg_bytes);
333 
334  void Reset() {
335  vRecv.clear();
336  hdrbuf.clear();
337  hdrbuf.resize(24);
338  in_data = false;
339  nHdrPos = 0;
340  nDataPos = 0;
341  data_hash.SetNull();
342  hasher.Reset();
343  }
344 
345 public:
346  V1TransportDeserializer(const CChainParams& chain_params, const NodeId node_id, int nTypeIn, int nVersionIn)
347  : m_chain_params(chain_params),
348  m_node_id(node_id),
349  hdrbuf(nTypeIn, nVersionIn),
350  vRecv(nTypeIn, nVersionIn)
351  {
352  Reset();
353  }
354 
355  bool Complete() const override
356  {
357  if (!in_data)
358  return false;
359  return (hdr.nMessageSize == nDataPos);
360  }
361  void SetVersion(int nVersionIn) override
362  {
363  hdrbuf.SetVersion(nVersionIn);
364  vRecv.SetVersion(nVersionIn);
365  }
366  int Read(Span<const uint8_t>& msg_bytes) override
367  {
368  int ret = in_data ? readData(msg_bytes) : readHeader(msg_bytes);
369  if (ret < 0) {
370  Reset();
371  } else {
372  msg_bytes = msg_bytes.subspan(ret);
373  }
374  return ret;
375  }
376  CNetMessage GetMessage(std::chrono::microseconds time, bool& reject_message) override;
377 };
378 
382 public:
383  // prepare message for transport (header construction, error-correction computation, payload encryption, etc.)
384  virtual void prepareForTransport(CSerializedNetMsg& msg, std::vector<unsigned char>& header) = 0;
385  virtual ~TransportSerializer() {}
386 };
387 
389 public:
390  void prepareForTransport(CSerializedNetMsg& msg, std::vector<unsigned char>& header) override;
391 };
392 
394 class CNode
395 {
396  friend class CConnman;
397  friend struct ConnmanTestMsg;
398 
399 public:
400  std::unique_ptr<TransportDeserializer> m_deserializer;
401  std::unique_ptr<TransportSerializer> m_serializer;
402 
404  std::atomic<ServiceFlags> nServices{NODE_NONE};
405  SOCKET hSocket GUARDED_BY(cs_hSocket);
407  size_t nSendSize GUARDED_BY(cs_vSend){0};
409  size_t nSendOffset GUARDED_BY(cs_vSend){0};
410  uint64_t nSendBytes GUARDED_BY(cs_vSend){0};
411  std::deque<std::vector<unsigned char>> vSendMsg GUARDED_BY(cs_vSend);
415 
417  std::list<CNetMessage> vProcessMsg GUARDED_BY(cs_vProcessMsg);
418  size_t nProcessQueueSize{0};
419 
421 
422  uint64_t nRecvBytes GUARDED_BY(cs_vRecv){0};
423 
424  std::atomic<std::chrono::seconds> m_last_send{0s};
425  std::atomic<std::chrono::seconds> m_last_recv{0s};
427  const std::chrono::seconds m_connected;
428  std::atomic<int64_t> nTimeOffset{0};
429  // Address of this peer
430  const CAddress addr;
431  // Bind address of our side of the connection
433  const std::string m_addr_name;
435  const bool m_inbound_onion;
436  std::atomic<int> nVersion{0};
442  std::string cleanSubVer GUARDED_BY(m_subver_mutex){};
443  bool m_prefer_evict{false}; // This peer is preferred for eviction.
444  bool HasPermission(NetPermissionFlags permission) const {
445  return NetPermissions::HasFlag(m_permissionFlags, permission);
446  }
447  bool fClient{false}; // set by version message
448  bool m_limited_node{false}; //after BIP159, set by version message
450  std::atomic_bool fSuccessfullyConnected{false};
451  // Setting fDisconnect to true will cause the node to be disconnected the
452  // next time DisconnectNodes() runs
453  std::atomic_bool fDisconnect{false};
455  std::atomic<int> nRefCount{0};
456 
457  const uint64_t nKeyedNetGroup;
458  std::atomic_bool fPauseRecv{false};
459  std::atomic_bool fPauseSend{false};
460 
462  switch (m_conn_type) {
465  return true;
470  return false;
471  } // no default case, so the compiler can warn about missing cases
472 
473  assert(false);
474  }
475 
476  bool IsFullOutboundConn() const {
478  }
479 
480  bool IsManualConn() const {
482  }
483 
484  bool IsBlockOnlyConn() const {
486  }
487 
488  bool IsFeelerConn() const {
490  }
491 
492  bool IsAddrFetchConn() const {
494  }
495 
496  bool IsInboundConn() const {
498  }
499 
500  bool ExpectServicesFromConn() const {
501  switch (m_conn_type) {
505  return false;
509  return true;
510  } // no default case, so the compiler can warn about missing cases
511 
512  assert(false);
513  }
514 
526 
527  // We selected peer as (compact blocks) high-bandwidth peer (BIP152)
528  std::atomic<bool> m_bip152_highbandwidth_to{false};
529  // Peer selected us as (compact blocks) high-bandwidth peer (BIP152)
530  std::atomic<bool> m_bip152_highbandwidth_from{false};
531 
532  struct TxRelay {
534  // We use fRelayTxes for two purposes -
535  // a) it allows us to not relay tx invs before receiving the peer's version message
536  // b) the peer may tell us in its version message that we should not relay tx invs
537  // unless it loads a bloom filter.
538  bool fRelayTxes GUARDED_BY(cs_filter){false};
539  std::unique_ptr<CBloomFilter> pfilter PT_GUARDED_BY(cs_filter) GUARDED_BY(cs_filter){nullptr};
540 
542  CRollingBloomFilter filterInventoryKnown GUARDED_BY(cs_tx_inventory){50000, 0.000001};
543  // Set of transaction ids we still have to announce.
544  // They are sorted by the mempool before relay, so the order is not important.
545  std::set<uint256> setInventoryTxToSend;
546  // Used for BIP35 mempool sending
547  bool fSendMempool GUARDED_BY(cs_tx_inventory){false};
548  // Last time a "MEMPOOL" request was serviced.
549  std::atomic<std::chrono::seconds> m_last_mempool_req{0s};
550  std::chrono::microseconds nNextInvSend{0};
551 
553  std::atomic<CAmount> minFeeFilter{0};
555  std::chrono::microseconds m_next_send_feefilter{0};
556  };
557 
558  // m_tx_relay == nullptr if we're not relaying transactions with this peer
559  std::unique_ptr<TxRelay> m_tx_relay;
560 
566  std::atomic<std::chrono::seconds> m_last_block_time{0s};
567 
572  std::atomic<std::chrono::seconds> m_last_tx_time{0s};
573 
575  std::atomic<std::chrono::microseconds> m_last_ping_time{0us};
576 
579  std::atomic<std::chrono::microseconds> m_min_ping_time{std::chrono::microseconds::max()};
580 
581  CNode(NodeId id, ServiceFlags nLocalServicesIn, SOCKET hSocketIn, const CAddress& addrIn, uint64_t nKeyedNetGroupIn, uint64_t nLocalHostNonceIn, const CAddress& addrBindIn, const std::string& addrNameIn, ConnectionType conn_type_in, bool inbound_onion);
582  ~CNode();
583  CNode(const CNode&) = delete;
584  CNode& operator=(const CNode&) = delete;
585 
586  NodeId GetId() const {
587  return id;
588  }
589 
590  uint64_t GetLocalNonce() const {
591  return nLocalHostNonce;
592  }
593 
594  int GetRefCount() const
595  {
596  assert(nRefCount >= 0);
597  return nRefCount;
598  }
599 
609  bool ReceiveMsgBytes(Span<const uint8_t> msg_bytes, bool& complete);
610 
611  void SetCommonVersion(int greatest_common_version)
612  {
614  m_greatest_common_version = greatest_common_version;
615  }
616  int GetCommonVersion() const
617  {
619  }
620 
623  void SetAddrLocal(const CService& addrLocalIn) LOCKS_EXCLUDED(m_addr_local_mutex);
624 
626  {
627  nRefCount++;
628  return this;
629  }
630 
631  void Release()
632  {
633  nRefCount--;
634  }
635 
636  void AddKnownTx(const uint256& hash)
637  {
638  if (m_tx_relay != nullptr) {
639  LOCK(m_tx_relay->cs_tx_inventory);
640  m_tx_relay->filterInventoryKnown.insert(hash);
641  }
642  }
643 
644  void PushTxInventory(const uint256& hash)
645  {
646  if (m_tx_relay == nullptr) return;
647  LOCK(m_tx_relay->cs_tx_inventory);
648  if (!m_tx_relay->filterInventoryKnown.contains(hash)) {
649  m_tx_relay->setInventoryTxToSend.insert(hash);
650  }
651  }
652 
653  void CloseSocketDisconnect();
654 
655  void CopyStats(CNodeStats& stats);
656 
658  {
659  return nLocalServices;
660  }
661 
663 
665  void PongReceived(std::chrono::microseconds ping_time) {
666  m_last_ping_time = ping_time;
667  m_min_ping_time = std::min(m_min_ping_time.load(), ping_time);
668  }
669 
670 private:
671  const NodeId id;
672  const uint64_t nLocalHostNonce;
675 
692 
693  std::list<CNetMessage> vRecvMsg; // Used only by SocketHandler thread
694 
695  // Our address, as reported by the peer
698 
699  mapMsgCmdSize mapSendBytesPerMsgCmd GUARDED_BY(cs_vSend);
700  mapMsgCmdSize mapRecvBytesPerMsgCmd GUARDED_BY(cs_vRecv);
701 };
702 
707 {
708 public:
710  virtual void InitializeNode(CNode* pnode) = 0;
711 
713  virtual void FinalizeNode(const CNode& node) = 0;
714 
722  virtual bool ProcessMessages(CNode* pnode, std::atomic<bool>& interrupt) = 0;
723 
730  virtual bool SendMessages(CNode* pnode) EXCLUSIVE_LOCKS_REQUIRED(pnode->cs_sendProcessing) = 0;
731 
732 
733 protected:
738  ~NetEventsInterface() = default;
739 };
740 
741 class CConnman
742 {
743 public:
744 
745  struct Options
746  {
751  int nMaxAddnode = 0;
752  int nMaxFeeler = 0;
755  BanMan* m_banman = nullptr;
756  unsigned int nSendBufferMaxSize = 0;
757  unsigned int nReceiveFloodSize = 0;
758  uint64_t nMaxOutboundLimit = 0;
760  std::vector<std::string> vSeedNodes;
761  std::vector<NetWhitelistPermissions> vWhitelistedRange;
762  std::vector<NetWhitebindPermissions> vWhiteBinds;
763  std::vector<CService> vBinds;
764  std::vector<CService> onion_binds;
769  std::vector<std::string> m_specified_outgoing;
770  std::vector<std::string> m_added_nodes;
772  };
773 
774  void Init(const Options& connOptions) {
775  nLocalServices = connOptions.nLocalServices;
776  nMaxConnections = connOptions.nMaxConnections;
777  m_max_outbound_full_relay = std::min(connOptions.m_max_outbound_full_relay, connOptions.nMaxConnections);
780  nMaxAddnode = connOptions.nMaxAddnode;
781  nMaxFeeler = connOptions.nMaxFeeler;
783  m_client_interface = connOptions.uiInterface;
784  m_banman = connOptions.m_banman;
785  m_msgproc = connOptions.m_msgproc;
787  nReceiveFloodSize = connOptions.nReceiveFloodSize;
788  m_peer_connect_timeout = std::chrono::seconds{connOptions.m_peer_connect_timeout};
789  {
791  nMaxOutboundLimit = connOptions.nMaxOutboundLimit;
792  }
793  vWhitelistedRange = connOptions.vWhitelistedRange;
794  {
796  m_added_nodes = connOptions.m_added_nodes;
797  }
798  m_onion_binds = connOptions.onion_binds;
799  }
800 
801  CConnman(uint64_t seed0, uint64_t seed1, AddrMan& addrman, bool network_active = true);
802  ~CConnman();
803  bool Start(CScheduler& scheduler, const Options& options);
804 
805  void StopThreads();
806  void StopNodes();
807  void Stop()
808  {
809  StopThreads();
810  StopNodes();
811  };
812 
813  void Interrupt();
814  bool GetNetworkActive() const { return fNetworkActive; };
816  void SetNetworkActive(bool active);
817  void OpenNetworkConnection(const CAddress& addrConnect, bool fCountFailure, CSemaphoreGrant* grantOutbound, const char* strDest, ConnectionType conn_type);
818  bool CheckIncomingNonce(uint64_t nonce);
819 
820  bool ForNode(NodeId id, std::function<bool(CNode* pnode)> func);
821 
822  void PushMessage(CNode* pnode, CSerializedNetMsg&& msg);
823 
824  using NodeFn = std::function<void(CNode*)>;
825  void ForEachNode(const NodeFn& func)
826  {
828  for (auto&& node : m_nodes) {
830  func(node);
831  }
832  };
833 
834  void ForEachNode(const NodeFn& func) const
835  {
837  for (auto&& node : m_nodes) {
839  func(node);
840  }
841  };
842 
843  // Addrman functions
851  std::vector<CAddress> GetAddresses(size_t max_addresses, size_t max_pct, std::optional<Network> network) const;
858  std::vector<CAddress> GetAddresses(CNode& requestor, size_t max_addresses, size_t max_pct);
859 
860  // This allows temporarily exceeding m_max_outbound_full_relay, with the goal of finding
861  // a peer that is better than all our current peers.
862  void SetTryNewOutboundPeer(bool flag);
863  bool GetTryNewOutboundPeer() const;
864 
866  LogPrint(BCLog::NET, "net: enabling extra block-relay-only peers\n");
868  }
869 
870  // Return the number of outbound peers we have in excess of our target (eg,
871  // if we previously called SetTryNewOutboundPeer(true), and have since set
872  // to false, we may have extra peers that we wish to disconnect). This may
873  // return a value less than (num_outbound_connections - num_outbound_slots)
874  // in cases where some outbound connections are not yet fully connected, or
875  // not yet fully disconnected.
876  int GetExtraFullOutboundCount() const;
877  // Count the number of block-relay-only peers we have over our limit.
878  int GetExtraBlockRelayCount() const;
879 
880  bool AddNode(const std::string& node);
881  bool RemoveAddedNode(const std::string& node);
882  std::vector<AddedNodeInfo> GetAddedNodeInfo() const;
883 
896  bool AddConnection(const std::string& address, ConnectionType conn_type);
897 
898  size_t GetNodeCount(ConnectionDirection) const;
899  void GetNodeStats(std::vector<CNodeStats>& vstats) const;
900  bool DisconnectNode(const std::string& node);
901  bool DisconnectNode(const CSubNet& subnet);
902  bool DisconnectNode(const CNetAddr& addr);
903  bool DisconnectNode(NodeId id);
904 
912 
913  uint64_t GetMaxOutboundTarget() const;
914  std::chrono::seconds GetMaxOutboundTimeframe() const;
915 
919  bool OutboundTargetReached(bool historicalBlockServingLimit) const;
920 
923  uint64_t GetOutboundTargetBytesLeft() const;
924 
927  std::chrono::seconds GetMaxOutboundTimeLeftInCycle() const;
928 
929  uint64_t GetTotalBytesRecv() const;
930  uint64_t GetTotalBytesSent() const;
931 
933  CSipHasher GetDeterministicRandomizer(uint64_t id) const;
934 
935  unsigned int GetReceiveFloodSize() const;
936 
937  void WakeMessageHandler();
938 
940  bool ShouldRunInactivityChecks(const CNode& node, std::chrono::seconds now) const;
941 
942 private:
943  struct ListenSocket {
944  public:
945  std::shared_ptr<Sock> sock;
947  ListenSocket(std::shared_ptr<Sock> sock_, NetPermissionFlags permissions_)
948  : sock{sock_}, m_permissions{permissions_}
949  {
950  }
951 
952  private:
954  };
955 
956  bool BindListenPort(const CService& bindAddr, bilingual_str& strError, NetPermissionFlags permissions);
957  bool Bind(const CService& addr, unsigned int flags, NetPermissionFlags permissions);
958  bool InitBinds(const Options& options);
959 
961  void AddAddrFetch(const std::string& strDest);
962  void ProcessAddrFetch();
963  void ThreadOpenConnections(std::vector<std::string> connect);
964  void ThreadMessageHandler();
966  void AcceptConnection(const ListenSocket& hListenSocket);
967 
976  void CreateNodeFromAcceptedSocket(std::unique_ptr<Sock>&& sock,
977  NetPermissionFlags permissionFlags,
978  const CAddress& addr_bind,
979  const CAddress& addr);
980 
981  void DisconnectNodes();
984  bool InactivityCheck(const CNode& node) const;
985 
994  bool GenerateSelectSet(const std::vector<CNode*>& nodes,
995  std::set<SOCKET>& recv_set,
996  std::set<SOCKET>& send_set,
997  std::set<SOCKET>& error_set);
998 
1007  void SocketEvents(const std::vector<CNode*>& nodes,
1008  std::set<SOCKET>& recv_set,
1009  std::set<SOCKET>& send_set,
1010  std::set<SOCKET>& error_set);
1011 
1015  void SocketHandler();
1016 
1025  void SocketHandlerConnected(const std::vector<CNode*>& nodes,
1026  const std::set<SOCKET>& recv_set,
1027  const std::set<SOCKET>& send_set,
1028  const std::set<SOCKET>& error_set);
1029 
1034  void SocketHandlerListening(const std::set<SOCKET>& recv_set);
1035 
1036  void ThreadSocketHandler();
1037  void ThreadDNSAddressSeed();
1038 
1039  uint64_t CalculateKeyedNetGroup(const CAddress& ad) const;
1040 
1041  CNode* FindNode(const CNetAddr& ip);
1042  CNode* FindNode(const CSubNet& subNet);
1043  CNode* FindNode(const std::string& addrName);
1044  CNode* FindNode(const CService& addr);
1045 
1050  bool AlreadyConnectedToAddress(const CAddress& addr);
1051 
1052  bool AttemptToEvictConnection();
1053  CNode* ConnectNode(CAddress addrConnect, const char *pszDest, bool fCountFailure, ConnectionType conn_type);
1055 
1056  void DeleteNode(CNode* pnode);
1057 
1058  NodeId GetNewNodeId();
1059 
1060  size_t SocketSendData(CNode& node) const EXCLUSIVE_LOCKS_REQUIRED(node.cs_vSend);
1061  void DumpAddresses();
1062 
1063  // Network stats
1064  void RecordBytesRecv(uint64_t bytes);
1065  void RecordBytesSent(uint64_t bytes);
1066 
1070  std::vector<CAddress> GetCurrentBlockRelayOnlyConns() const;
1071 
1072  // Whether the node should be passed out in ForEach* callbacks
1073  static bool NodeFullyConnected(const CNode* pnode);
1074 
1075  // Network usage totals
1077  std::atomic<uint64_t> nTotalBytesRecv{0};
1078  uint64_t nTotalBytesSent GUARDED_BY(cs_totalBytesSent) {0};
1079 
1080  // outbound limit & stats
1081  uint64_t nMaxOutboundTotalBytesSentInCycle GUARDED_BY(cs_totalBytesSent) {0};
1082  std::chrono::seconds nMaxOutboundCycleStartTime GUARDED_BY(cs_totalBytesSent) {0};
1083  uint64_t nMaxOutboundLimit GUARDED_BY(cs_totalBytesSent);
1084 
1085  // P2P timeout in seconds
1086  std::chrono::seconds m_peer_connect_timeout;
1087 
1088  // Whitelisted ranges. Any node connecting from these is automatically
1089  // whitelisted (as well as those connecting to whitelisted binds).
1090  std::vector<NetWhitelistPermissions> vWhitelistedRange;
1091 
1092  unsigned int nSendBufferMaxSize{0};
1093  unsigned int nReceiveFloodSize{0};
1094 
1095  std::vector<ListenSocket> vhListenSocket;
1096  std::atomic<bool> fNetworkActive{true};
1099  std::deque<std::string> m_addr_fetches GUARDED_BY(m_addr_fetches_mutex);
1101  std::vector<std::string> m_added_nodes GUARDED_BY(m_added_nodes_mutex);
1103  std::vector<CNode*> m_nodes GUARDED_BY(m_nodes_mutex);
1104  std::list<CNode*> m_nodes_disconnected;
1106  std::atomic<NodeId> nLastNodeId{0};
1107  unsigned int nPrevNodeCount{0};
1108 
1116  std::vector<CAddress> m_addrs_response_cache;
1117  std::chrono::microseconds m_cache_entry_expiration{0};
1118  };
1119 
1134  std::map<uint64_t, CachedAddrResponse> m_addr_response_caches;
1135 
1149 
1150  std::unique_ptr<CSemaphore> semOutbound;
1151  std::unique_ptr<CSemaphore> semAddnode;
1153 
1154  // How many full-relay (tx, block, addr) outbound peers we want
1156 
1157  // How many block-relay only outbound peers we want
1158  // We do not relay tx or addr messages with these peers
1160 
1169 
1174  std::vector<CAddress> m_anchors;
1175 
1177  const uint64_t nSeed0, nSeed1;
1178 
1180  bool fMsgProcWake GUARDED_BY(mutexMsgProc);
1181 
1182  std::condition_variable condMsgProc;
1184  std::atomic<bool> flagInterruptMsgProc{false};
1185 
1193 
1198  std::unique_ptr<i2p::sam::Session> m_i2p_sam_session;
1199 
1201  std::thread threadSocketHandler;
1206 
1211 
1216  std::atomic_bool m_start_extra_block_relay_peers{false};
1217 
1222  std::vector<CService> m_onion_binds;
1223 
1229  {
1230  public:
1231  explicit NodesSnapshot(const CConnman& connman, bool shuffle)
1232  {
1233  {
1234  LOCK(connman.m_nodes_mutex);
1235  m_nodes_copy = connman.m_nodes;
1236  for (auto& node : m_nodes_copy) {
1237  node->AddRef();
1238  }
1239  }
1240  if (shuffle) {
1242  }
1243  }
1244 
1246  {
1247  for (auto& node : m_nodes_copy) {
1248  node->Release();
1249  }
1250  }
1251 
1252  const std::vector<CNode*>& Nodes() const
1253  {
1254  return m_nodes_copy;
1255  }
1256 
1257  private:
1258  std::vector<CNode*> m_nodes_copy;
1259  };
1260 
1261  friend struct CConnmanTest;
1262  friend struct ConnmanTestMsg;
1263 };
1264 
1266 void CaptureMessage(const CAddress& addr, const std::string& msg_type, const Span<const unsigned char>& data, bool is_incoming);
1267 
1269 {
1271  std::chrono::seconds m_connected;
1272  std::chrono::microseconds m_min_ping_time;
1273  std::chrono::seconds m_last_block_time;
1274  std::chrono::seconds m_last_tx_time;
1278  uint64_t nKeyedNetGroup;
1282 };
1283 
1291 [[nodiscard]] std::optional<NodeId> SelectNodeToEvict(std::vector<NodeEvictionCandidate>&& vEvictionCandidates);
1292 
1314 void ProtectEvictionCandidatesByRatio(std::vector<NodeEvictionCandidate>& vEvictionCandidates);
1315 
1316 #endif // BITCOIN_NET_H
NodeEvictionCandidate::m_network
Network m_network
Definition: net.h:1281
V1TransportSerializer
Definition: net.h:388
CConnman::SetTryNewOutboundPeer
void SetTryNewOutboundPeer(bool flag)
Definition: net.cpp:1815
NodeId
int64_t NodeId
Definition: net.h:88
CConnman::DisconnectNode
bool DisconnectNode(const std::string &node)
Definition: net.cpp:2831
CService
A combination of a network address (CNetAddr) and a (TCP) port.
Definition: netaddress.h:528
threadinterrupt.h
CNodeStats::m_last_ping_time
std::chrono::microseconds m_last_ping_time
Definition: net.h:263
CNode::IsOutboundOrBlockRelayConn
bool IsOutboundOrBlockRelayConn() const
Definition: net.h:461
CConnman::m_max_outbound
int m_max_outbound
Definition: net.h:1163
CConnman::m_anchors
std::vector< CAddress > m_anchors
Addresses that were saved during the previous clean shutdown.
Definition: net.h:1174
feerate.h
CConnman::ConnectNode
CNode * ConnectNode(CAddress addrConnect, const char *pszDest, bool fCountFailure, ConnectionType conn_type)
Definition: net.cpp:403
CScheduler
Simple class for background tasks that should be run periodically or once "after a while".
Definition: scheduler.h:33
CConnman::Options::vSeedNodes
std::vector< std::string > vSeedNodes
Definition: net.h:760
CConnman::vhListenSocket
std::vector< ListenSocket > vhListenSocket
Definition: net.h:1095
V1TransportDeserializer::Complete
bool Complete() const override
Definition: net.h:355
CNodeStats::fInbound
bool fInbound
Definition: net.h:254
CNode::GUARDED_BY
size_t nSendSize GUARDED_BY(cs_vSend)
Total size of all vSendMsg entries.
Definition: net.h:407
CConnman::NodesSnapshot::~NodesSnapshot
~NodesSnapshot()
Definition: net.h:1245
CNodeStats::m_last_tx_time
std::chrono::seconds m_last_tx_time
Definition: net.h:247
CConnman::ThreadMessageHandler
void ThreadMessageHandler()
Definition: net.cpp:2260
CNode::IsFeelerConn
bool IsFeelerConn() const
Definition: net.h:488
CNode::GetRefCount
int GetRefCount() const
Definition: net.h:594
assert
assert(!tx.IsCoinBase())
TransportDeserializer
The TransportDeserializer takes care of holding and deserializing the network receive buffer.
Definition: net.h:303
NetEventsInterface
Interface for message handling.
Definition: net.h:706
CConnman::Options::nMaxAddnode
int nMaxAddnode
Definition: net.h:751
NodeEvictionCandidate::m_min_ping_time
std::chrono::microseconds m_min_ping_time
Definition: net.h:1272
check.h
CNodeStats::m_network
Network m_network
Definition: net.h:273
CConnman::nSendBufferMaxSize
unsigned int nSendBufferMaxSize
Definition: net.h:1092
NetPermissionFlags::None
@ None
CNode::m_last_tx_time
std::atomic< std::chrono::seconds > m_last_tx_time
UNIX epoch time of the last transaction received from this peer that we had not yet seen (e....
Definition: net.h:572
CConnman::AttemptToEvictConnection
bool AttemptToEvictConnection()
Try to find a connection to evict when the node is full.
Definition: net.cpp:1057
CNode::cs_vSend
Mutex cs_vSend
Definition: net.h:412
CNodeStats::addrLocal
std::string addrLocal
Definition: net.h:267
TIMEOUT_INTERVAL
static constexpr std::chrono::minutes TIMEOUT_INTERVAL
Time after which to disconnect, after waiting for a ping response (or inactivity).
Definition: net.h:52
CConnman::Interrupt
void Interrupt()
Definition: net.cpp:2641
CClientUIInterface
Signals for UI communication.
Definition: ui_interface.h:24
CNode::GetId
NodeId GetId() const
Definition: net.h:586
CConnman::condMsgProc
std::condition_variable condMsgProc
Definition: net.h:1182
CConnman::nReceiveFloodSize
unsigned int nReceiveFloodSize
Definition: net.h:1093
CNode::GUARDED_BY
size_t nSendOffset GUARDED_BY(cs_vSend)
Offset inside the first vSendMsg already sent.
Definition: net.h:409
NodeEvictionCandidate::fBloomFilter
bool fBloomFilter
Definition: net.h:1277
CNodeStats::nodeid
NodeId nodeid
Definition: net.h:242
CNode::GUARDED_BY
std::string cleanSubVer GUARDED_BY(m_subver_mutex)
cleanSubVer is a sanitized string of the user agent byte array we read from the wire.
Definition: net.h:442
CMessageHeader::nMessageSize
uint32_t nMessageSize
Definition: protocol.h:56
CNode::PongReceived
void PongReceived(std::chrono::microseconds ping_time)
A ping-pong round trip has completed successfully.
Definition: net.h:665
flags
int flags
Definition: bitcoin-tx.cpp:525
NodeEvictionCandidate::m_last_block_time
std::chrono::seconds m_last_block_time
Definition: net.h:1273
CConnman::ThreadDNSAddressSeed
void ThreadDNSAddressSeed()
Definition: net.cpp:1672
CNodeStats::nVersion
int nVersion
Definition: net.h:252
streams.h
CHash256::Reset
CHash256 & Reset()
Definition: hash.h:42
CConnman::Options::vBinds
std::vector< CService > vBinds
Definition: net.h:763
CSerializedNetMsg::data
std::vector< unsigned char > data
Definition: net.h:110
TransportDeserializer::GetMessage
virtual CNetMessage GetMessage(std::chrono::microseconds time, bool &reject_message)=0
CNode::nRefCount
std::atomic< int > nRefCount
Definition: net.h:455
CConnman::StartExtraBlockRelayPeers
void StartExtraBlockRelayPeers()
Definition: net.h:865
CConnman::RecordBytesRecv
void RecordBytesRecv(uint64_t bytes)
Definition: net.cpp:2874
CNode::Release
void Release()
Definition: net.h:631
CConnman::GetMaxOutboundTimeframe
std::chrono::seconds GetMaxOutboundTimeframe() const
Definition: net.cpp:2901
CConnman::WakeMessageHandler
void WakeMessageHandler()
Definition: net.cpp:1663
CNode::m_bip152_highbandwidth_from
std::atomic< bool > m_bip152_highbandwidth_from
Definition: net.h:530
CConnman::ListenSocket::ListenSocket
ListenSocket(std::shared_ptr< Sock > sock_, NetPermissionFlags permissions_)
Definition: net.h:947
CConnman::Bind
bool Bind(const CService &addr, unsigned int flags, NetPermissionFlags permissions)
Definition: net.cpp:2483
CConnman::Options::m_i2p_accept_incoming
bool m_i2p_accept_incoming
Definition: net.h:771
CNode::nProcessQueueSize
size_t nProcessQueueSize
Definition: net.h:418
sync.h
NodeEvictionCandidate::m_last_tx_time
std::chrono::seconds m_last_tx_time
Definition: net.h:1274
CConnman::m_max_outbound_full_relay
int m_max_outbound_full_relay
Definition: net.h:1155
CConnman::m_nodes_disconnected
std::list< CNode * > m_nodes_disconnected
Definition: net.h:1104
Discover
void Discover()
Definition: net.cpp:2401
CNodeStats::m_last_send
std::chrono::seconds m_last_send
Definition: net.h:245
CConnman::Options::nMaxOutboundLimit
uint64_t nMaxOutboundLimit
Definition: net.h:758
CNodeStats::m_last_recv
std::chrono::seconds m_last_recv
Definition: net.h:246
CNode::nLocalServices
const ServiceFlags nLocalServices
Services offered to this peer.
Definition: net.h:691
CConnman::m_onion_binds
std::vector< CService > m_onion_binds
A vector of -bind=<address>:<port>=onion arguments each of which is an address and port that are desi...
Definition: net.h:1222
CNodeStats::mapRecvBytesPerMsgCmd
mapMsgCmdSize mapRecvBytesPerMsgCmd
Definition: net.h:261
CNode::m_limited_node
bool m_limited_node
Definition: net.h:448
bilingual_str
Bilingual messages:
Definition: translation.h:16
CNetAddr
Network address.
Definition: netaddress.h:118
CConnman::OutboundTargetReached
bool OutboundTargetReached(bool historicalBlockServingLimit) const
check if the outbound target is reached if param historicalBlockServingLimit is set true,...
Definition: net.cpp:2920
CConnman::ProcessAddrFetch
void ProcessAddrFetch()
Definition: net.cpp:1793
uint256.h
NodeEvictionCandidate::fRelayTxes
bool fRelayTxes
Definition: net.h:1276
DEFAULT_MAX_PEER_CONNECTIONS
static const unsigned int DEFAULT_MAX_PEER_CONNECTIONS
The maximum number of peer connections to maintain.
Definition: net.h:72
AddLocal
bool AddLocal(const CService &addr, int nScore=LOCAL_NONE)
Definition: net.cpp:251
ConnectionType::OUTBOUND_FULL_RELAY
@ OUTBOUND_FULL_RELAY
These are the default connections that we use to connect with the network.
CNode
Information about a peer.
Definition: net.h:394
CConnman::Options::bind_on_any
bool bind_on_any
True if the user did not specify -bind= or -whitebind= and thus we should bind on 0....
Definition: net.h:767
CNode::GUARDED_BY
SOCKET hSocket GUARDED_BY(cs_hSocket)
DEFAULT_MAXRECEIVEBUFFER
static const size_t DEFAULT_MAXRECEIVEBUFFER
Definition: net.h:85
ProtectEvictionCandidatesByRatio
void ProtectEvictionCandidatesByRatio(std::vector< NodeEvictionCandidate > &vEvictionCandidates)
Protect desirable or disadvantaged inbound peers from eviction by ratio.
Definition: net.cpp:916
AddrMan
Stochastic address manager.
Definition: addrman.h:79
CConnman::Options::nLocalServices
ServiceFlags nLocalServices
Definition: net.h:747
CNode::m_last_block_time
std::atomic< std::chrono::seconds > m_last_block_time
UNIX epoch time of the last block received from this peer that we had not yet seen (e....
Definition: net.h:566
CConnman::CreateNodeFromAcceptedSocket
void CreateNodeFromAcceptedSocket(std::unique_ptr< Sock > &&sock, NetPermissionFlags permissionFlags, const CAddress &addr_bind, const CAddress &addr)
Create a CNode object from a socket that has just been accepted and add the node to the m_nodes membe...
Definition: net.cpp:1129
CChainParams
CChainParams defines various tweakable parameters of a given instance of the Bitcoin system.
Definition: chainparams.h:69
base_blob::SetNull
void SetNull()
Definition: uint256.h:39
CConnman::AddConnection
bool AddConnection(const std::string &address, ConnectionType conn_type)
Attempts to open a connection.
Definition: net.cpp:1219
CNode::m_serializer
std::unique_ptr< TransportSerializer > m_serializer
Definition: net.h:401
CConnman::AcceptConnection
void AcceptConnection(const ListenSocket &hListenSocket)
Definition: net.cpp:1101
CConnman::Options::m_added_nodes
std::vector< std::string > m_added_nodes
Definition: net.h:770
CConnman::GetLocalServices
ServiceFlags GetLocalServices() const
Used to convey which local services we are offering peers during node connection.
Definition: net.cpp:2960
NetPermissions::HasFlag
static bool HasFlag(NetPermissionFlags flags, NetPermissionFlags f)
Definition: net_permissions.h:53
AnnotatedMixin< std::mutex >
CConnman::cs_totalBytesSent
RecursiveMutex cs_totalBytesSent
Definition: net.h:1076
CSerializedNetMsg::m_type
std::string m_type
Definition: net.h:111
CNodeStats::mapSendBytesPerMsgCmd
mapMsgCmdSize mapSendBytesPerMsgCmd
Definition: net.h:259
CNode::PushTxInventory
void PushTxInventory(const uint256 &hash)
Definition: net.h:644
ServiceFlags
ServiceFlags
nServices flags
Definition: protocol.h:271
CConnman::CachedAddrResponse::m_addrs_response_cache
std::vector< CAddress > m_addrs_response_cache
Definition: net.h:1116
CNode::ExpectServicesFromConn
bool ExpectServicesFromConn() const
Definition: net.h:500
V1TransportDeserializer::vRecv
CDataStream vRecv
Definition: net.h:326
CNode::m_permissionFlags
NetPermissionFlags m_permissionFlags
Definition: net.h:403
CNode::nTimeOffset
std::atomic< int64_t > nTimeOffset
Definition: net.h:428
CNode::nServices
std::atomic< ServiceFlags > nServices
Definition: net.h:404
CNode::m_connected
const std::chrono::seconds m_connected
Unix epoch time at peer connection.
Definition: net.h:427
CConnman::SocketEvents
void SocketEvents(const std::vector< CNode * > &nodes, std::set< SOCKET > &recv_set, std::set< SOCKET > &send_set, std::set< SOCKET > &error_set)
Check which sockets are ready for IO.
Definition: net.cpp:1449
chainparams.h
CNode::TxRelay::cs_filter
RecursiveMutex cs_filter
Definition: net.h:533
CConnman::Start
bool Start(CScheduler &scheduler, const Options &options)
Definition: net.cpp:2527
CConnman::CalculateKeyedNetGroup
uint64_t CalculateKeyedNetGroup(const CAddress &ad) const
Definition: net.cpp:3068
CNodeStats::addrBind
CAddress addrBind
Definition: net.h:271
V1TransportDeserializer::readData
int readData(Span< const uint8_t > msg_bytes)
Definition: net.cpp:719
Network
Network
A network type.
Definition: netaddress.h:45
CNodeStats::addr
CAddress addr
Definition: net.h:269
CConnman::GetTryNewOutboundPeer
bool GetTryNewOutboundPeer() const
Definition: net.cpp:1810
CConnman::StopThreads
void StopThreads()
Definition: net.cpp:2665
DEFAULT_FORCEDNSSEED
static constexpr bool DEFAULT_FORCEDNSSEED
Definition: net.h:82
CConnman::NotifyNumConnectionsChanged
void NotifyNumConnectionsChanged()
Definition: net.cpp:1305
LOCAL_MAX
@ LOCAL_MAX
Definition: net.h:196
CNode::fDisconnect
std::atomic_bool fDisconnect
Definition: net.h:453
V1TransportDeserializer::data_hash
uint256 data_hash
Definition: net.h:322
CSipHasher
SipHash-2-4.
Definition: siphash.h:13
CConnman::GetMaxOutboundTimeLeftInCycle
std::chrono::seconds GetMaxOutboundTimeLeftInCycle() const
returns the time left in the current max outbound cycle in case of no limit, it will always return 0
Definition: net.cpp:2906
CNode::GetAddrLocal
CService GetAddrLocal() const LOCKS_EXCLUDED(m_addr_local_mutex)
Definition: net.cpp:554
NetPermissionFlags
NetPermissionFlags
Definition: net_permissions.h:18
CConnman::nPrevNodeCount
unsigned int nPrevNodeCount
Definition: net.h:1107
AddedNodeInfo::fConnected
bool fConnected
Definition: net.h:94
ConnectionType::MANUAL
@ MANUAL
We open manual connections to addresses that users explicitly requested via the addnode RPC or the -a...
CNodeStats::m_min_ping_time
std::chrono::microseconds m_min_ping_time
Definition: net.h:264
CConnman::AddAddrFetch
void AddAddrFetch(const std::string &strDest)
Definition: net.cpp:120
CConnman::InactivityCheck
bool InactivityCheck(const CNode &node) const
Return true if the peer is inactive and should be disconnected.
Definition: net.cpp:1325
CNode::TxRelay::cs_tx_inventory
RecursiveMutex cs_tx_inventory
Definition: net.h:539
CConnman::GUARDED_BY
uint64_t nMaxOutboundTotalBytesSentInCycle GUARDED_BY(cs_totalBytesSent)
Definition: net.h:1081
CConnman::m_client_interface
CClientUIInterface * m_client_interface
Definition: net.h:1165
CNode::addr
const CAddress addr
Definition: net.h:430
CConnman::GetNodeStats
void GetNodeStats(std::vector< CNodeStats > &vstats) const
Definition: net.cpp:2819
CConnman::OpenNetworkConnection
void OpenNetworkConnection(const CAddress &addrConnect, bool fCountFailure, CSemaphoreGrant *grantOutbound, const char *strDest, ConnectionType conn_type)
Definition: net.cpp:2225
ConnmanTestMsg
Definition: net.h:19
CNetMessage::m_type
std::string m_type
Definition: net.h:289
CNodeStats::m_last_block_time
std::chrono::seconds m_last_block_time
Definition: net.h:248
NodeEvictionCandidate::nKeyedNetGroup
uint64_t nKeyedNetGroup
Definition: net.h:1278
CNode::SetCommonVersion
void SetCommonVersion(int greatest_common_version)
Definition: net.h:611
CNode::GetLocalServices
ServiceFlags GetLocalServices() const
Definition: net.h:657
CNodeStats::m_starting_height
int m_starting_height
Definition: net.h:257
bloom.h
Span
A Span is an object that can refer to a contiguous sequence of objects.
Definition: span.h:96
Assume
#define Assume(val)
Assume is the identity function.
Definition: check.h:72
CConnman::FindNode
CNode * FindNode(const CNetAddr &ip)
Definition: net.cpp:328
NetEventsInterface::InitializeNode
virtual void InitializeNode(CNode *pnode)=0
Initialize a peer (setup state, queue any initial messages)
ConnectionType::INBOUND
@ INBOUND
Inbound connections are those initiated by a peer.
V1TransportDeserializer::hdr
CMessageHeader hdr
Definition: net.h:325
CConnman::GenerateSelectSet
bool GenerateSelectSet(const std::vector< CNode * > &nodes, std::set< SOCKET > &recv_set, std::set< SOCKET > &send_set, std::set< SOCKET > &error_set)
Generate a collection of sockets to check for IO readiness.
Definition: net.cpp:1358
CConnman::m_addr_response_caches
std::map< uint64_t, CachedAddrResponse > m_addr_response_caches
Addr responses stored in different caches per (network, local socket) prevent cross-network node iden...
Definition: net.h:1134
siphash.h
CSemaphoreGrant
RAII-style semaphore lock.
Definition: sync.h:309
protocol.h
MAX_OUTBOUND_FULL_RELAY_CONNECTIONS
static const int MAX_OUTBOUND_FULL_RELAY_CONNECTIONS
Maximum number of automatic outgoing nodes over which we'll relay everything (blocks,...
Definition: net.h:62
CConnman::CConnman
CConnman(uint64_t seed0, uint64_t seed1, AddrMan &addrman, bool network_active=true)
Definition: net.cpp:2467
random.h
CConnman::nMaxFeeler
int nMaxFeeler
Definition: net.h:1162
CNode::m_deserializer
std::unique_ptr< TransportDeserializer > m_deserializer
Definition: net.h:400
LOCAL_MAPPED
@ LOCAL_MAPPED
Definition: net.h:193
CConnman::mutexMsgProc
Mutex mutexMsgProc
Definition: net.h:1183
CNodeStats::m_mapped_as
uint32_t m_mapped_as
Definition: net.h:274
SeenLocal
bool SeenLocal(const CService &addr)
vote for a local address
Definition: net.cpp:311
TransportSerializer::~TransportSerializer
virtual ~TransportSerializer()
Definition: net.h:385
CConnman::nLocalServices
ServiceFlags nLocalServices
Services this instance offers.
Definition: net.h:1148
CConnman::ThreadSocketHandler
void ThreadSocketHandler()
Definition: net.cpp:1652
CConnman::ThreadOpenAddedConnections
void ThreadOpenAddedConnections()
Definition: net.cpp:2196
CNode::AddKnownTx
void AddKnownTx(const uint256 &hash)
Definition: net.h:636
V1TransportDeserializer::in_data
bool in_data
Definition: net.h:323
CConnman::m_addr_fetches_mutex
Mutex m_addr_fetches_mutex
Definition: net.h:1100
DEFAULT_MAXSENDBUFFER
static const size_t DEFAULT_MAXSENDBUFFER
Definition: net.h:86
NodeEvictionCandidate
Definition: net.h:1268
LOCAL_MANUAL
@ LOCAL_MANUAL
Definition: net.h:194
CNode::ConnectedThroughNetwork
Network ConnectedThroughNetwork() const
Get network the peer connected through.
Definition: net.cpp:571
CNode::TxRelay::m_last_mempool_req
std::atomic< std::chrono::seconds > m_last_mempool_req
Definition: net.h:549
CNodeStats::m_permissionFlags
NetPermissionFlags m_permissionFlags
Definition: net.h:262
CNodeStats::m_addr_name
std::string m_addr_name
Definition: net.h:251
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Definition: net.h:414
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Definition: net.cpp:1783
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Definition: net.h:532
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std::atomic_bool m_start_extra_block_relay_peers
flag for initiating extra block-relay-only peer connections.
Definition: net.h:1216
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Definition: net.h:1270
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CNode * AddRef()
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RAII helper to atomically create a copy of m_nodes and add a reference to each of the nodes.
Definition: net.h:1228
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Pointer to this node's banman.
Definition: net.h:1168
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Determine whether we're already connected to a given address, in order to avoid initiating duplicate ...
Definition: net.cpp:372
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Send queued protocol messages to a given node.
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Definition: net.h:58
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Return true if we should disconnect the peer for failing an inactivity check.
Definition: net.cpp:1320
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Select an inbound peer to evict after filtering out (protecting) peers having distinct,...
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CAmount lastSentFeeFilter
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Mark a network as reachable or unreachable (no automatic connects to it)
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Definition: net.h:101
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Cache responses to addr requests to minimize privacy leak.
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Definition: net.h:943
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Definition: net.h:346
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Definition: net.h:90
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Amount in satoshis (Can be negative)
Definition: amount.h:12
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Definition: net.h:313
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read and deserialize data, advances msg_bytes data pointer
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Do the read/write for connected sockets that are ready for IO.
Definition: net.cpp:1550
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static constexpr bool DEFAULT_FIXEDSEEDS
Definition: net.h:84
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int m_max_outbound_block_relay
Definition: net.h:750
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More efficient than using std::shuffle on a FastRandomContext.
Definition: random.h:243
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Definition: netaddress.h:475
CConnman::ListenSocket::AddSocketPermissionFlags
void AddSocketPermissionFlags(NetPermissionFlags &flags) const
Definition: net.h:946
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CHash256 hasher
Definition: net.h:321
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bool IsAddrFetchConn() const
Definition: net.h:492
CConnman::InitBinds
bool InitBinds(const Options &options)
Definition: net.cpp:2505
CConnman::SocketHandlerListening
void SocketHandlerListening(const std::set< SOCKET > &recv_set)
Accept incoming connections, one from each read-ready listening socket.
Definition: net.cpp:1640
CNode::cs_vProcessMsg
RecursiveMutex cs_vProcessMsg
Definition: net.h:416
CNode::cs_hSocket
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Definition: net.h:413
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std::string cleanSubVer
Definition: net.h:253
g_maplocalhost_mutex
Mutex g_maplocalhost_mutex
Definition: net.cpp:115
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Mutex m_addr_local_mutex
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std::thread threadMessageHandler
Definition: net.h:1204
TransportSerializer::prepareForTransport
virtual void prepareForTransport(CSerializedNetMsg &msg, std::vector< unsigned char > &header)=0
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256-bit opaque blob.
Definition: uint256.h:124
MAX_FEELER_CONNECTIONS
static const int MAX_FEELER_CONNECTIONS
Maximum number of feeler connections.
Definition: net.h:68
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CDataStream m_recv
received message data
Definition: net.h:285
LogPrint
#define LogPrint(category,...)
Definition: logging.h:191
CConnman::Options::nReceiveFloodSize
unsigned int nReceiveFloodSize
Definition: net.h:757
CNode::IsBlockOnlyConn
bool IsBlockOnlyConn() const
Definition: net.h:484
CConnman::nSeed0
const uint64_t nSeed0
SipHasher seeds for deterministic randomness.
Definition: net.h:1177
ConnectionType::FEELER
@ FEELER
Feeler connections are short-lived connections made to check that a node is alive.
CNodeStats::m_conn_type
ConnectionType m_conn_type
Definition: net.h:275
CConnman::~CConnman
~CConnman()
Definition: net.cpp:2722
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std::chrono::seconds m_peer_connect_timeout
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Definition: net.h:745
CNode::GUARDED_BY
uint64_t nSendBytes GUARDED_BY(cs_vSend)
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CConnman::GetReceiveFloodSize
unsigned int GetReceiveFloodSize() const
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CSemaphoreGrant grantOutbound
Definition: net.h:454
CConnman::GetMaxOutboundTarget
uint64_t GetMaxOutboundTarget() const
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Definition: net.cpp:299
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std::atomic< CAmount > minFeeFilter
Minimum fee rate with which to filter inv's to this node.
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Definition: net.h:1280
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virtual bool ProcessMessages(CNode *pnode, std::atomic< bool > &interrupt)=0
Process protocol messages received from a given node.
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int nMaxConnections
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void SetVersion(int n)
Definition: streams.h:342
NODE_NONE
@ NODE_NONE
Definition: protocol.h:274
CSerializedNetMsg::CSerializedNetMsg
CSerializedNetMsg()=default
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Definition: banman.h:58
CDataStream::resize
void resize(size_type n, value_type c=value_type{})
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int64_t nTimeOffset
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CConnman::Options::nSendBufferMaxSize
unsigned int nSendBufferMaxSize
Definition: net.h:756
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NetPermissionFlags m_permissions
Definition: net.h:953
CNode::nKeyedNetGroup
const uint64_t nKeyedNetGroup
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std::atomic< NodeId > nLastNodeId
Definition: net.h:1106
CConnman::RemoveAddedNode
bool RemoveAddedNode(const std::string &node)
Definition: net.cpp:2791
fListen
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Definition: net.cpp:114
CConnman::m_nodes_mutex
RecursiveMutex m_nodes_mutex
Definition: net.h:1105
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CDataStream hdrbuf
Definition: net.h:324
CNode::IsManualConn
bool IsManualConn() const
Definition: net.h:480
CConnman::Options::uiInterface
CClientUIInterface * uiInterface
Definition: net.h:753
CNode::SetAddrLocal
void SetAddrLocal(const CService &addrLocalIn) LOCKS_EXCLUDED(m_addr_local_mutex)
May not be called more than once.
Definition: net.cpp:561
AddedNodeInfo::resolvedAddress
CService resolvedAddress
Definition: net.h:93
CConnman::GetExtraFullOutboundCount
int GetExtraFullOutboundCount() const
Definition: net.cpp:1827
fDiscover
bool fDiscover
Definition: net.cpp:113
CConnman::GUARDED_BY
uint64_t nTotalBytesSent GUARDED_BY(cs_totalBytesSent)
Definition: net.h:1078
CConnman::GetCurrentBlockRelayOnlyConns
std::vector< CAddress > GetCurrentBlockRelayOnlyConns() const
Return vector of current BLOCK_RELAY peers.
Definition: net.cpp:2129
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const uint64_t nSeed1
Definition: net.h:1177
CConnman
Definition: net.h:741
CConnman::threadI2PAcceptIncoming
std::thread threadI2PAcceptIncoming
Definition: net.h:1205
V1TransportDeserializer::Reset
void Reset()
Definition: net.h:334
CNode::id
const NodeId id
Definition: net.h:671
CConnman::Options::nMaxFeeler
int nMaxFeeler
Definition: net.h:752
CConnman::StopNodes
void StopNodes()
Definition: net.cpp:2682
CConnman::m_try_another_outbound_peer
std::atomic_bool m_try_another_outbound_peer
flag for deciding to connect to an extra outbound peer, in excess of m_max_outbound_full_relay This t...
Definition: net.h:1210
CNode::cs_sendProcessing
RecursiveMutex cs_sendProcessing
Definition: net.h:420
NetEventsInterface::~NetEventsInterface
~NetEventsInterface()=default
Protected destructor so that instances can only be deleted by derived classes.
V1TransportDeserializer::GetMessageHash
const uint256 & GetMessageHash() const
Definition: net.cpp:736
LocalServiceInfo::nScore
int nScore
Definition: net.h:229
GetLocal
bool GetLocal(CService &addr, const CNetAddr *paddrPeer=nullptr)
Definition: net.cpp:132
CNodeStats::nSendBytes
uint64_t nSendBytes
Definition: net.h:258
CAddress
A CService with information about it as peer.
Definition: protocol.h:358
MAX_BLOCK_RELAY_ONLY_CONNECTIONS
static const int MAX_BLOCK_RELAY_ONLY_CONNECTIONS
Maximum number of block-relay-only outgoing connections.
Definition: net.h:66
LOCKS_EXCLUDED
#define LOCKS_EXCLUDED(...)
Definition: threadsafety.h:48
CMessageHeader
Message header.
Definition: protocol.h:30
CNodeStats::m_bip152_highbandwidth_to
bool m_bip152_highbandwidth_to
Definition: net.h:255
CConnman::SetNetworkActive
void SetNetworkActive(bool active)
Definition: net.cpp:2452
CNode::nLocalHostNonce
const uint64_t nLocalHostNonce
Definition: net.h:672
CConnman::NodeFullyConnected
static bool NodeFullyConnected(const CNode *pnode)
Definition: net.cpp:3004
DEFAULT_WHITELISTRELAY
static const bool DEFAULT_WHITELISTRELAY
Default for -whitelistrelay.
Definition: net.h:47
LocalServiceInfo
Definition: net.h:228
ConnectionTypeAsString
std::string ConnectionTypeAsString(ConnectionType conn_type)
Convert ConnectionType enum to a string value.
Definition: net.cpp:534
NetPermissions::AddFlag
static void AddFlag(NetPermissionFlags &flags, NetPermissionFlags f)
Definition: net_permissions.h:58
CConnman::m_added_nodes_mutex
Mutex m_added_nodes_mutex
Definition: net.h:1102
CNetMessage::m_message_size
uint32_t m_message_size
size of the payload
Definition: net.h:287
CConnman::Options::m_msgproc
NetEventsInterface * m_msgproc
Definition: net.h:754
CNode::m_inbound_onion
const bool m_inbound_onion
Whether this peer is an inbound onion, i.e. connected via our Tor onion service.
Definition: net.h:435
CNetMessage::CNetMessage
CNetMessage(CDataStream &&recv_in)
Definition: net.h:291
MAX_ADDNODE_CONNECTIONS
static const int MAX_ADDNODE_CONNECTIONS
Maximum number of addnode outgoing nodes.
Definition: net.h:64
CDataStream::clear
void clear()
Definition: streams.h:241
EXCLUSIVE_LOCKS_REQUIRED
#define EXCLUSIVE_LOCKS_REQUIRED(...)
Definition: threadsafety.h:49
CNode::m_last_send
std::atomic< std::chrono::seconds > m_last_send
Definition: net.h:424
LOCK
#define LOCK(cs)
Definition: sync.h:226
V1TransportDeserializer::SetVersion
void SetVersion(int nVersionIn) override
Definition: net.h:361
CNode::m_prefer_evict
bool m_prefer_evict
Definition: net.h:443
ConnectionType::ADDR_FETCH
@ ADDR_FETCH
AddrFetch connections are short lived connections used to solicit addresses from peers.
CConnman::GetExtraBlockRelayCount
int GetExtraBlockRelayCount() const
Definition: net.cpp:1841
CNetMessage::SetVersion
void SetVersion(int nVersionIn)
Definition: net.h:293
i2p.h
NetEventsInterface::FinalizeNode
virtual void FinalizeNode(const CNode &node)=0
Handle removal of a peer (clear state)
std
Definition: setup_common.h:33
CConnman::ForEachNode
void ForEachNode(const NodeFn &func)
Definition: net.h:825
CNode::m_subver_mutex
Mutex m_subver_mutex
Definition: net.h:437
CNode::CloseSocketDisconnect
void CloseSocketDisconnect()
Definition: net.cpp:517
CNode::ConnectionTypeAsString
std::string ConnectionTypeAsString() const
Definition: net.h:662
V1TransportDeserializer
Definition: net.h:316
TransportSerializer
The TransportSerializer prepares messages for the network transport.
Definition: net.h:381
CNode::TxRelay::PT_GUARDED_BY
std::unique_ptr< CBloomFilter > pfilter PT_GUARDED_BY(cs_filter) GUARDED_BY(cs_filter)
Definition: net.h:539
CNetMessage
Transport protocol agnostic message container.
Definition: net.h:283
LOCAL_IF
@ LOCAL_IF
Definition: net.h:191
NodeEvictionCandidate::prefer_evict
bool prefer_evict
Definition: net.h:1279
DEFAULT_MAX_UPLOAD_TARGET
static const std::string DEFAULT_MAX_UPLOAD_TARGET
The default for -maxuploadtarget.
Definition: net.h:74
CConnman::SocketHandler
void SocketHandler()
Check connected and listening sockets for IO readiness and process them accordingly.
Definition: net.cpp:1527
CNode::m_last_ping_time
std::atomic< std::chrono::microseconds > m_last_ping_time
Last measured round-trip time.
Definition: net.h:575
CConnman::DisconnectNodes
void DisconnectNodes()
Definition: net.cpp:1255
CNodeStats::m_connected
std::chrono::seconds m_connected
Definition: net.h:249
mapMsgCmdSize
std::map< std::string, uint64_t > mapMsgCmdSize
Definition: net.h:237
FEELER_INTERVAL
static constexpr auto FEELER_INTERVAL
Run the feeler connection loop once every 2 minutes.
Definition: net.h:54
CConnman::GetAddedNodeInfo
std::vector< AddedNodeInfo > GetAddedNodeInfo() const
Definition: net.cpp:2142
NET_MESSAGE_COMMAND_OTHER
const std::string NET_MESSAGE_COMMAND_OTHER
Definition: net.cpp:105
CNode::CopyStats
void CopyStats(CNodeStats &stats)
Definition: net.cpp:578
CNode::GetLocalNonce
uint64_t GetLocalNonce() const
Definition: net.h:590
CNode::m_addr_name
const std::string m_addr_name
Definition: net.h:433
CConnman::nTotalBytesRecv
std::atomic< uint64_t > nTotalBytesRecv
Definition: net.h:1077
LocalServiceInfo::nPort
uint16_t nPort
Definition: net.h:230
hash.h
CConnman::Options::m_specified_outgoing
std::vector< std::string > m_specified_outgoing
Definition: net.h:769
CConnman::Stop
void Stop()
Definition: net.h:807
DEFAULT_PEER_CONNECT_TIMEOUT
static const int64_t DEFAULT_PEER_CONNECT_TIMEOUT
-peertimeout default
Definition: net.h:78
CNode::HasPermission
bool HasPermission(NetPermissionFlags permission) const
Definition: net.h:444
node
Definition: init.h:22
NUM_FDS_MESSAGE_CAPTURE
static const int NUM_FDS_MESSAGE_CAPTURE
Number of file descriptors required for message capture.
Definition: net.h:80
CConnman::AddNode
bool AddNode(const std::string &node)
Definition: net.cpp:2780
CNode::IsInboundConn
bool IsInboundConn() const
Definition: net.h:496
CNode::operator=
CNode & operator=(const CNode &)=delete
CNode::vRecvMsg
std::list< CNetMessage > vRecvMsg
Definition: net.h:693
CDataStream
Double ended buffer combining vector and stream-like interfaces.
Definition: streams.h:184
V1TransportDeserializer::Read
int Read(Span< const uint8_t > &msg_bytes) override
read and deserialize data, advances msg_bytes data pointer
Definition: net.h:366
V1TransportSerializer::prepareForTransport
void prepareForTransport(CSerializedNetMsg &msg, std::vector< unsigned char > &header) override
Definition: net.cpp:781
CConnman::threadOpenAddedConnections
std::thread threadOpenAddedConnections
Definition: net.h:1202
CConnman::GetNetworkActive
bool GetNetworkActive() const
Definition: net.h:814
CConnman::GetUseAddrmanOutgoing
bool GetUseAddrmanOutgoing() const
Definition: net.h:815
CConnman::CachedAddrResponse::m_cache_entry_expiration
std::chrono::microseconds m_cache_entry_expiration
Definition: net.h:1117
CHash256
A hasher class for Bitcoin's 256-bit hash (double SHA-256).
Definition: hash.h:24
V1TransportDeserializer::m_node_id
const NodeId m_node_id
Definition: net.h:320
CConnman::NodeFn
std::function< void(CNode *)> NodeFn
Definition: net.h:824
CNode::m_min_ping_time
std::atomic< std::chrono::microseconds > m_min_ping_time
Lowest measured round-trip time.
Definition: net.h:579
CConnman::Options::m_max_outbound_full_relay
int m_max_outbound_full_relay
Definition: net.h:749
ConnectionType::BLOCK_RELAY
@ BLOCK_RELAY
We use block-relay-only connections to help prevent against partition attacks.
netbase.h
CConnman::GUARDED_BY
std::chrono::seconds nMaxOutboundCycleStartTime GUARDED_BY(cs_totalBytesSent)
Definition: net.h:1082
RemoveLocal
void RemoveLocal(const CService &addr)
Definition: net.cpp:284
LOCAL_NONE
@ LOCAL_NONE
Definition: net.h:190
CNode::ReceiveMsgBytes
bool ReceiveMsgBytes(Span< const uint8_t > msg_bytes, bool &complete)
Receive bytes from the buffer and deserialize them into messages.
Definition: net.cpp:634
CConnman::CConnmanTest
friend struct CConnmanTest
Definition: net.h:1261
CNodeStats::nRecvBytes
uint64_t nRecvBytes
Definition: net.h:260
CConnman::ThreadI2PAcceptIncoming
void ThreadI2PAcceptIncoming()
Definition: net.cpp:2301
ConnectionDirection
ConnectionDirection
Definition: netbase.h:32
DEFAULT_WHITELISTFORCERELAY
static const bool DEFAULT_WHITELISTFORCERELAY
Default for -whitelistforcerelay.
Definition: net.h:49
CConnman::ThreadOpenConnections
void ThreadOpenConnections(std::vector< std::string > connect)
Definition: net.cpp:1855
CConnman::semOutbound
std::unique_ptr< CSemaphore > semOutbound
Definition: net.h:1150
CNode::nVersion
std::atomic< int > nVersion
Definition: net.h:436
BCLog::NET
@ NET
Definition: logging.h:38
CConnman::semAddnode
std::unique_ptr< CSemaphore > semAddnode
Definition: net.h:1151
CConnman::GetTotalBytesSent
uint64_t GetTotalBytesSent() const
Definition: net.cpp:2954
CConnman::flagInterruptMsgProc
std::atomic< bool > flagInterruptMsgProc
Definition: net.h:1184
DEFAULT_BLOCKSONLY
static const bool DEFAULT_BLOCKSONLY
Default for blocks only.
Definition: net.h:76
CConnman::m_msgproc
NetEventsInterface * m_msgproc
Definition: net.h:1166
CConnman::threadDNSAddressSeed
std::thread threadDNSAddressSeed
Definition: net.h:1200
CConnman::Init
void Init(const Options &connOptions)
Definition: net.h:774
DEFAULT_DNSSEED
static constexpr bool DEFAULT_DNSSEED
Definition: net.h:83
LOCAL_BIND
@ LOCAL_BIND
Definition: net.h:192
CConnman::NodesSnapshot::Nodes
const std::vector< CNode * > & Nodes() const
Definition: net.h:1252
V1TransportDeserializer::m_chain_params
const CChainParams & m_chain_params
Definition: net.h:319
CNode::fClient
bool fClient
Definition: net.h:447
CConnman::ListenSocket::sock
std::shared_ptr< Sock > sock
Definition: net.h:945
CConnman::m_i2p_sam_session
std::unique_ptr< i2p::sam::Session > m_i2p_sam_session
I2P SAM session.
Definition: net.h:1198
CNode::IsFullOutboundConn
bool IsFullOutboundConn() const
Definition: net.h:476
CConnman::threadSocketHandler
std::thread threadSocketHandler
Definition: net.h:1201
CConnman::CheckIncomingNonce
bool CheckIncomingNonce(uint64_t nonce)
Definition: net.cpp:377
CConnman::m_max_outbound_block_relay
int m_max_outbound_block_relay
Definition: net.h:1159
CNode::m_greatest_common_version
std::atomic< int > m_greatest_common_version
Definition: net.h:674
CNode::TxRelay::GUARDED_BY
bool fSendMempool GUARDED_BY(cs_tx_inventory)
Definition: net.h:547
CConnman::NodesSnapshot::m_nodes_copy
std::vector< CNode * > m_nodes_copy
Definition: net.h:1258
amount.h
CThreadInterrupt
Definition: threadinterrupt.h:19
CNode::TxRelay::GUARDED_BY
bool fRelayTxes GUARDED_BY(cs_filter)
Definition: net.h:538
ConnectionType
ConnectionType
Different types of connections to a peer.
Definition: net.h:121
TransportDeserializer::Complete
virtual bool Complete() const =0
IsLocal
bool IsLocal(const CService &addr)
check whether a given address is potentially local
Definition: net.cpp:322
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Subversion as sent to the P2P network in version messages.
Definition: net.cpp:118
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Returns a local address that we should advertise to this peer.
Definition: net.cpp:209
CaptureMessage
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Dump binary message to file, with timestamp.
Definition: net.cpp:3075
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Maximum length of the user agent string in version message.
Definition: net.h:60
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Definition: net.h:1096
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CConnman::GetDeterministicRandomizer
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Get a unique deterministic randomizer.
Definition: net.cpp:3063
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Definition: net.cpp:2803
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Definition: net.h:1161
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Definition: net.h:1152
FastRandomContext
Fast randomness source.
Definition: random.h:131
CConnman::GetAddresses
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Return all or many randomly selected addresses, optionally by network.
Definition: net.cpp:2728
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Definition: net.cpp:3009
CNode::~CNode
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Definition: net.cpp:2999
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Definition: net.h:288
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GetLocalAddress
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Definition: net.h:56
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Definition: net.cpp:2967
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Definition: span.h:194
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Definition: net.h:327
INIT_PROTO_VERSION
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initial proto version, to be increased after version/verack negotiation
Definition: version.h:15
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Definition: net.h:458
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Definition: net.cpp:2879
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Definition: net.h:550
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response the bytes left in the current max outbound cycle in case of no limit, it will always respons...
Definition: net.cpp:2940
DEFAULT_LISTEN
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-listen default
Definition: net.h:70
SOCKET
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Definition: compat.h:41
V1TransportDeserializer::GetMessage
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Definition: net.cpp:744
IsPeerAddrLocalGood
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Definition: net.cpp:202
CConnman::DeleteNode
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Definition: net.cpp:2715
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Definition: net.h:432
CConnman::ForEachNode
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Definition: net.h:834
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Definition: net.h:1275