1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2009-2016 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.
15 #include "limitedmap.h"
16 #include "netaddress.h"
22 #include "threadinterrupt.h"
29 #include <condition_variable>
32 #include <arpa/inet.h>
35 #include <boost/filesystem/path.hpp>
36 #include <boost/foreach.hpp>
37 #include <boost/signals2/signal.hpp>
47 /** Time between pings automatically sent out for latency probing and keepalive (in seconds). */
48 static const int PING_INTERVAL
= 2 * 60;
49 /** Time after which to disconnect, after waiting for a ping response (or inactivity). */
50 static const int TIMEOUT_INTERVAL
= 20 * 60;
51 /** Run the feeler connection loop once every 2 minutes or 120 seconds. **/
52 static const int FEELER_INTERVAL
= 120;
53 /** The maximum number of entries in an 'inv' protocol message */
54 static const unsigned int MAX_INV_SZ
= 50000;
55 /** The maximum number of new addresses to accumulate before announcing. */
56 static const unsigned int MAX_ADDR_TO_SEND
= 1000;
57 /** Maximum length of incoming protocol messages (no message over 4 MB is currently acceptable). */
58 static const unsigned int MAX_PROTOCOL_MESSAGE_LENGTH
= 4 * 1000 * 1000;
59 /** Maximum length of strSubVer in `version` message */
60 static const unsigned int MAX_SUBVERSION_LENGTH
= 256;
61 /** Maximum number of automatic outgoing nodes */
62 static const int MAX_OUTBOUND_CONNECTIONS
= 8;
63 /** Maximum number of addnode outgoing nodes */
64 static const int MAX_ADDNODE_CONNECTIONS
= 8;
65 /** -listen default */
66 static const bool DEFAULT_LISTEN
= true;
69 static const bool DEFAULT_UPNP
= USE_UPNP
;
71 static const bool DEFAULT_UPNP
= false;
73 /** The maximum number of entries in mapAskFor */
74 static const size_t MAPASKFOR_MAX_SZ
= MAX_INV_SZ
;
75 /** The maximum number of entries in setAskFor (larger due to getdata latency)*/
76 static const size_t SETASKFOR_MAX_SZ
= 2 * MAX_INV_SZ
;
77 /** The maximum number of peer connections to maintain. */
78 static const unsigned int DEFAULT_MAX_PEER_CONNECTIONS
= 125;
79 /** The default for -maxuploadtarget. 0 = Unlimited */
80 static const uint64_t DEFAULT_MAX_UPLOAD_TARGET
= 0;
81 /** The default timeframe for -maxuploadtarget. 1 day. */
82 static const uint64_t MAX_UPLOAD_TIMEFRAME
= 60 * 60 * 24;
83 /** Default for blocks only*/
84 static const bool DEFAULT_BLOCKSONLY
= false;
86 static const bool DEFAULT_FORCEDNSSEED
= false;
87 static const size_t DEFAULT_MAXRECEIVEBUFFER
= 5 * 1000;
88 static const size_t DEFAULT_MAXSENDBUFFER
= 1 * 1000;
90 static const ServiceFlags REQUIRED_SERVICES
= NODE_NETWORK
;
92 // NOTE: When adjusting this, update rpcnet:setban's help ("24h")
93 static const unsigned int DEFAULT_MISBEHAVING_BANTIME
= 60 * 60 * 24; // Default 24-hour ban
99 std::string strAddedNode
;
100 CService resolvedAddress
;
107 class CClientUIInterface
;
109 struct CSerializedNetMsg
111 CSerializedNetMsg() = default;
112 CSerializedNetMsg(CSerializedNetMsg
&&) = default;
113 CSerializedNetMsg
& operator=(CSerializedNetMsg
&&) = default;
114 // No copying, only moves.
115 CSerializedNetMsg(const CSerializedNetMsg
& msg
) = delete;
116 CSerializedNetMsg
& operator=(const CSerializedNetMsg
&) = delete;
118 std::vector
<unsigned char> data
;
127 enum NumConnections
{
128 CONNECTIONS_NONE
= 0,
129 CONNECTIONS_IN
= (1U << 0),
130 CONNECTIONS_OUT
= (1U << 1),
131 CONNECTIONS_ALL
= (CONNECTIONS_IN
| CONNECTIONS_OUT
),
136 ServiceFlags nLocalServices
= NODE_NONE
;
137 ServiceFlags nRelevantServices
= NODE_NONE
;
138 int nMaxConnections
= 0;
139 int nMaxOutbound
= 0;
143 CClientUIInterface
* uiInterface
= nullptr;
144 unsigned int nSendBufferMaxSize
= 0;
145 unsigned int nReceiveFloodSize
= 0;
146 uint64_t nMaxOutboundTimeframe
= 0;
147 uint64_t nMaxOutboundLimit
= 0;
149 CConnman(uint64_t seed0
, uint64_t seed1
);
151 bool Start(CScheduler
& scheduler
, std::string
& strNodeError
, Options options
);
154 bool BindListenPort(const CService
&bindAddr
, std::string
& strError
, bool fWhitelisted
= false);
155 bool GetNetworkActive() const { return fNetworkActive
; };
156 void SetNetworkActive(bool active
);
157 bool OpenNetworkConnection(const CAddress
& addrConnect
, bool fCountFailure
, CSemaphoreGrant
*grantOutbound
= NULL
, const char *strDest
= NULL
, bool fOneShot
= false, bool fFeeler
= false, bool fAddnode
= false);
158 bool CheckIncomingNonce(uint64_t nonce
);
160 bool ForNode(NodeId id
, std::function
<bool(CNode
* pnode
)> func
);
162 void PushMessage(CNode
* pnode
, CSerializedNetMsg
&& msg
);
164 template<typename Callable
>
165 void ForEachNode(Callable
&& func
)
168 for (auto&& node
: vNodes
) {
169 if (NodeFullyConnected(node
))
174 template<typename Callable
>
175 void ForEachNode(Callable
&& func
) const
178 for (auto&& node
: vNodes
) {
179 if (NodeFullyConnected(node
))
184 template<typename Callable
, typename CallableAfter
>
185 void ForEachNodeThen(Callable
&& pre
, CallableAfter
&& post
)
188 for (auto&& node
: vNodes
) {
189 if (NodeFullyConnected(node
))
195 template<typename Callable
, typename CallableAfter
>
196 void ForEachNodeThen(Callable
&& pre
, CallableAfter
&& post
) const
199 for (auto&& node
: vNodes
) {
200 if (NodeFullyConnected(node
))
207 size_t GetAddressCount() const;
208 void SetServices(const CService
&addr
, ServiceFlags nServices
);
209 void MarkAddressGood(const CAddress
& addr
);
210 void AddNewAddress(const CAddress
& addr
, const CAddress
& addrFrom
, int64_t nTimePenalty
= 0);
211 void AddNewAddresses(const std::vector
<CAddress
>& vAddr
, const CAddress
& addrFrom
, int64_t nTimePenalty
= 0);
212 std::vector
<CAddress
> GetAddresses();
213 void AddressCurrentlyConnected(const CService
& addr
);
215 // Denial-of-service detection/prevention
216 // The idea is to detect peers that are behaving
217 // badly and disconnect/ban them, but do it in a
218 // one-coding-mistake-won't-shatter-the-entire-network
220 // IMPORTANT: There should be nothing I can give a
221 // node that it will forward on that will make that
222 // node's peers drop it. If there is, an attacker
223 // can isolate a node and/or try to split the network.
224 // Dropping a node for sending stuff that is invalid
225 // now but might be valid in a later version is also
226 // dangerous, because it can cause a network split
227 // between nodes running old code and nodes running
229 void Ban(const CNetAddr
& netAddr
, const BanReason
& reason
, int64_t bantimeoffset
= 0, bool sinceUnixEpoch
= false);
230 void Ban(const CSubNet
& subNet
, const BanReason
& reason
, int64_t bantimeoffset
= 0, bool sinceUnixEpoch
= false);
231 void ClearBanned(); // needed for unit testing
232 bool IsBanned(CNetAddr ip
);
233 bool IsBanned(CSubNet subnet
);
234 bool Unban(const CNetAddr
&ip
);
235 bool Unban(const CSubNet
&ip
);
236 void GetBanned(banmap_t
&banmap
);
237 void SetBanned(const banmap_t
&banmap
);
239 void AddOneShot(const std::string
& strDest
);
241 bool AddNode(const std::string
& node
);
242 bool RemoveAddedNode(const std::string
& node
);
243 std::vector
<AddedNodeInfo
> GetAddedNodeInfo();
245 size_t GetNodeCount(NumConnections num
);
246 void GetNodeStats(std::vector
<CNodeStats
>& vstats
);
247 bool DisconnectNode(const std::string
& node
);
248 bool DisconnectNode(NodeId id
);
250 unsigned int GetSendBufferSize() const;
252 void AddWhitelistedRange(const CSubNet
&subnet
);
254 ServiceFlags
GetLocalServices() const;
256 //!set the max outbound target in bytes
257 void SetMaxOutboundTarget(uint64_t limit
);
258 uint64_t GetMaxOutboundTarget();
260 //!set the timeframe for the max outbound target
261 void SetMaxOutboundTimeframe(uint64_t timeframe
);
262 uint64_t GetMaxOutboundTimeframe();
264 //!check if the outbound target is reached
265 // if param historicalBlockServingLimit is set true, the function will
266 // response true if the limit for serving historical blocks has been reached
267 bool OutboundTargetReached(bool historicalBlockServingLimit
);
269 //!response the bytes left in the current max outbound cycle
270 // in case of no limit, it will always response 0
271 uint64_t GetOutboundTargetBytesLeft();
273 //!response the time in second left in the current max outbound cycle
274 // in case of no limit, it will always response 0
275 uint64_t GetMaxOutboundTimeLeftInCycle();
277 uint64_t GetTotalBytesRecv();
278 uint64_t GetTotalBytesSent();
280 void SetBestHeight(int height
);
281 int GetBestHeight() const;
283 /** Get a unique deterministic randomizer. */
284 CSipHasher
GetDeterministicRandomizer(uint64_t id
) const;
286 unsigned int GetReceiveFloodSize() const;
288 void WakeMessageHandler();
290 struct ListenSocket
{
294 ListenSocket(SOCKET socket_
, bool whitelisted_
) : socket(socket_
), whitelisted(whitelisted_
) {}
297 void ThreadOpenAddedConnections();
298 void ProcessOneShot();
299 void ThreadOpenConnections();
300 void ThreadMessageHandler();
301 void AcceptConnection(const ListenSocket
& hListenSocket
);
302 void ThreadSocketHandler();
303 void ThreadDNSAddressSeed();
305 uint64_t CalculateKeyedNetGroup(const CAddress
& ad
) const;
307 CNode
* FindNode(const CNetAddr
& ip
);
308 CNode
* FindNode(const CSubNet
& subNet
);
309 CNode
* FindNode(const std::string
& addrName
);
310 CNode
* FindNode(const CService
& addr
);
312 bool AttemptToEvictConnection();
313 CNode
* ConnectNode(CAddress addrConnect
, const char *pszDest
, bool fCountFailure
);
314 bool IsWhitelistedRange(const CNetAddr
&addr
);
316 void DeleteNode(CNode
* pnode
);
318 NodeId
GetNewNodeId();
320 size_t SocketSendData(CNode
*pnode
) const;
321 //!check is the banlist has unwritten changes
322 bool BannedSetIsDirty();
323 //!set the "dirty" flag for the banlist
324 void SetBannedSetDirty(bool dirty
=true);
325 //!clean unused entries (if bantime has expired)
327 void DumpAddresses();
332 void RecordBytesRecv(uint64_t bytes
);
333 void RecordBytesSent(uint64_t bytes
);
335 // Whether the node should be passed out in ForEach* callbacks
336 static bool NodeFullyConnected(const CNode
* pnode
);
338 // Network usage totals
339 CCriticalSection cs_totalBytesRecv
;
340 CCriticalSection cs_totalBytesSent
;
341 uint64_t nTotalBytesRecv
;
342 uint64_t nTotalBytesSent
;
344 // outbound limit & stats
345 uint64_t nMaxOutboundTotalBytesSentInCycle
;
346 uint64_t nMaxOutboundCycleStartTime
;
347 uint64_t nMaxOutboundLimit
;
348 uint64_t nMaxOutboundTimeframe
;
350 // Whitelisted ranges. Any node connecting from these is automatically
351 // whitelisted (as well as those connecting to whitelisted binds).
352 std::vector
<CSubNet
> vWhitelistedRange
;
353 CCriticalSection cs_vWhitelistedRange
;
355 unsigned int nSendBufferMaxSize
;
356 unsigned int nReceiveFloodSize
;
358 std::vector
<ListenSocket
> vhListenSocket
;
359 std::atomic
<bool> fNetworkActive
;
361 CCriticalSection cs_setBanned
;
362 bool setBannedIsDirty
;
363 bool fAddressesInitialized
;
365 std::deque
<std::string
> vOneShots
;
366 CCriticalSection cs_vOneShots
;
367 std::vector
<std::string
> vAddedNodes
;
368 CCriticalSection cs_vAddedNodes
;
369 std::vector
<CNode
*> vNodes
;
370 std::list
<CNode
*> vNodesDisconnected
;
371 mutable CCriticalSection cs_vNodes
;
372 std::atomic
<NodeId
> nLastNodeId
;
374 /** Services this instance offers */
375 ServiceFlags nLocalServices
;
377 /** Services this instance cares about */
378 ServiceFlags nRelevantServices
;
380 CSemaphore
*semOutbound
;
381 CSemaphore
*semAddnode
;
386 std::atomic
<int> nBestHeight
;
387 CClientUIInterface
* clientInterface
;
389 /** SipHasher seeds for deterministic randomness */
390 const uint64_t nSeed0
, nSeed1
;
392 /** flag for waking the message processor. */
395 std::condition_variable condMsgProc
;
396 std::mutex mutexMsgProc
;
397 std::atomic
<bool> flagInterruptMsgProc
;
399 CThreadInterrupt interruptNet
;
401 std::thread threadDNSAddressSeed
;
402 std::thread threadSocketHandler
;
403 std::thread threadOpenAddedConnections
;
404 std::thread threadOpenConnections
;
405 std::thread threadMessageHandler
;
407 extern std::unique_ptr
<CConnman
> g_connman
;
408 void Discover(boost::thread_group
& threadGroup
);
409 void MapPort(bool fUseUPnP
);
410 unsigned short GetListenPort();
411 bool BindListenPort(const CService
&bindAddr
, std::string
& strError
, bool fWhitelisted
= false);
415 typedef bool result_type
;
418 bool operator()(I first
, I last
) const
420 while (first
!= last
) {
421 if (!(*first
)) return false;
428 // Signals for message handling
431 boost::signals2::signal
<bool (CNode
*, CConnman
&, std::atomic
<bool>&), CombinerAll
> ProcessMessages
;
432 boost::signals2::signal
<bool (CNode
*, CConnman
&, std::atomic
<bool>&), CombinerAll
> SendMessages
;
433 boost::signals2::signal
<void (CNode
*, CConnman
&)> InitializeNode
;
434 boost::signals2::signal
<void (NodeId
, bool&)> FinalizeNode
;
438 CNodeSignals
& GetNodeSignals();
443 LOCAL_NONE
, // unknown
444 LOCAL_IF
, // address a local interface listens on
445 LOCAL_BIND
, // address explicit bound to
446 LOCAL_UPNP
, // address reported by UPnP
447 LOCAL_MANUAL
, // address explicitly specified (-externalip=)
452 bool IsPeerAddrLocalGood(CNode
*pnode
);
453 void AdvertiseLocal(CNode
*pnode
);
454 void SetLimited(enum Network net
, bool fLimited
= true);
455 bool IsLimited(enum Network net
);
456 bool IsLimited(const CNetAddr
& addr
);
457 bool AddLocal(const CService
& addr
, int nScore
= LOCAL_NONE
);
458 bool AddLocal(const CNetAddr
& addr
, int nScore
= LOCAL_NONE
);
459 bool RemoveLocal(const CService
& addr
);
460 bool SeenLocal(const CService
& addr
);
461 bool IsLocal(const CService
& addr
);
462 bool GetLocal(CService
&addr
, const CNetAddr
*paddrPeer
= NULL
);
463 bool IsReachable(enum Network net
);
464 bool IsReachable(const CNetAddr
&addr
);
465 CAddress
GetLocalAddress(const CNetAddr
*paddrPeer
, ServiceFlags nLocalServices
);
468 extern bool fDiscover
;
470 extern bool fRelayTxes
;
472 extern limitedmap
<uint256
, int64_t> mapAlreadyAskedFor
;
474 /** Subversion as sent to the P2P network in `version` messages */
475 extern std::string strSubVersion
;
477 struct LocalServiceInfo
{
482 extern CCriticalSection cs_mapLocalHost
;
483 extern std::map
<CNetAddr
, LocalServiceInfo
> mapLocalHost
;
484 typedef std::map
<std::string
, uint64_t> mapMsgCmdSize
; //command, total bytes
490 ServiceFlags nServices
;
494 int64_t nTimeConnected
;
496 std::string addrName
;
498 std::string cleanSubVer
;
503 mapMsgCmdSize mapSendBytesPerMsgCmd
;
505 mapMsgCmdSize mapRecvBytesPerMsgCmd
;
510 std::string addrLocal
;
519 mutable CHash256 hasher
;
520 mutable uint256 data_hash
;
522 bool in_data
; // parsing header (false) or data (true)
524 CDataStream hdrbuf
; // partially received header
525 CMessageHeader hdr
; // complete header
526 unsigned int nHdrPos
;
528 CDataStream vRecv
; // received message data
529 unsigned int nDataPos
;
531 int64_t nTime
; // time (in microseconds) of message receipt.
533 CNetMessage(const CMessageHeader::MessageStartChars
& pchMessageStartIn
, int nTypeIn
, int nVersionIn
) : hdrbuf(nTypeIn
, nVersionIn
), hdr(pchMessageStartIn
), vRecv(nTypeIn
, nVersionIn
) {
541 bool complete() const
545 return (hdr
.nMessageSize
== nDataPos
);
548 const uint256
& GetMessageHash() const;
550 void SetVersion(int nVersionIn
)
552 hdrbuf
.SetVersion(nVersionIn
);
553 vRecv
.SetVersion(nVersionIn
);
556 int readHeader(const char *pch
, unsigned int nBytes
);
557 int readData(const char *pch
, unsigned int nBytes
);
561 /** Information about a peer */
564 friend class CConnman
;
567 ServiceFlags nServices
;
568 ServiceFlags nServicesExpected
;
570 size_t nSendSize
; // total size of all vSendMsg entries
571 size_t nSendOffset
; // offset inside the first vSendMsg already sent
573 std::deque
<std::vector
<unsigned char>> vSendMsg
;
574 CCriticalSection cs_vSend
;
576 CCriticalSection cs_vProcessMsg
;
577 std::list
<CNetMessage
> vProcessMsg
;
578 size_t nProcessQueueSize
;
580 CCriticalSection cs_sendProcessing
;
582 std::deque
<CInv
> vRecvGetData
;
584 std::atomic
<int> nRecvVersion
;
588 int64_t nTimeConnected
;
591 std::string addrName
;
593 std::atomic
<int> nVersion
;
594 // strSubVer is whatever byte array we read from the wire. However, this field is intended
595 // to be printed out, displayed to humans in various forms and so on. So we sanitize it and
596 // store the sanitized version in cleanSubVer. The original should be used when dealing with
597 // the network or wire types and the cleaned string used when displayed or logged.
598 std::string strSubVer
, cleanSubVer
;
599 bool fWhitelisted
; // This peer can bypass DoS banning.
600 bool fFeeler
; // If true this node is being used as a short lived feeler.
605 std::atomic_bool fSuccessfullyConnected
;
606 std::atomic_bool fDisconnect
;
607 // We use fRelayTxes for two purposes -
608 // a) it allows us to not relay tx invs before receiving the peer's version message
609 // b) the peer may tell us in its version message that we should not relay tx invs
610 // unless it loads a bloom filter.
611 bool fRelayTxes
; //protected by cs_filter
613 CSemaphoreGrant grantOutbound
;
614 CCriticalSection cs_filter
;
615 CBloomFilter
* pfilter
;
619 const uint64_t nKeyedNetGroup
;
620 std::atomic_bool fPauseRecv
;
621 std::atomic_bool fPauseSend
;
624 mapMsgCmdSize mapSendBytesPerMsgCmd
;
625 mapMsgCmdSize mapRecvBytesPerMsgCmd
;
628 uint256 hashContinue
;
632 std::vector
<CAddress
> vAddrToSend
;
633 CRollingBloomFilter addrKnown
;
635 std::set
<uint256
> setKnown
;
636 int64_t nNextAddrSend
;
637 int64_t nNextLocalAddrSend
;
639 // inventory based relay
640 CRollingBloomFilter filterInventoryKnown
;
641 // Set of transaction ids we still have to announce.
642 // They are sorted by the mempool before relay, so the order is not important.
643 std::set
<uint256
> setInventoryTxToSend
;
644 // List of block ids we still have announce.
645 // There is no final sorting before sending, as they are always sent immediately
646 // and in the order requested.
647 std::vector
<uint256
> vInventoryBlockToSend
;
648 CCriticalSection cs_inventory
;
649 std::set
<uint256
> setAskFor
;
650 std::multimap
<int64_t, CInv
> mapAskFor
;
651 int64_t nNextInvSend
;
652 // Used for headers announcements - unfiltered blocks to relay
653 // Also protected by cs_inventory
654 std::vector
<uint256
> vBlockHashesToAnnounce
;
655 // Used for BIP35 mempool sending, also protected by cs_inventory
658 // Last time a "MEMPOOL" request was serviced.
659 std::atomic
<int64_t> timeLastMempoolReq
;
661 // Block and TXN accept times
662 std::atomic
<int64_t> nLastBlockTime
;
663 std::atomic
<int64_t> nLastTXTime
;
665 // Ping time measurement:
666 // The pong reply we're expecting, or 0 if no pong expected.
667 uint64_t nPingNonceSent
;
668 // Time (in usec) the last ping was sent, or 0 if no ping was ever sent.
669 int64_t nPingUsecStart
;
670 // Last measured round-trip time.
671 int64_t nPingUsecTime
;
672 // Best measured round-trip time.
673 int64_t nMinPingUsecTime
;
674 // Whether a ping is requested.
676 // Minimum fee rate with which to filter inv's to this node
677 CAmount minFeeFilter
;
678 CCriticalSection cs_feeFilter
;
679 CAmount lastSentFeeFilter
;
680 int64_t nextSendTimeFeeFilter
;
682 CNode(NodeId id
, ServiceFlags nLocalServicesIn
, int nMyStartingHeightIn
, SOCKET hSocketIn
, const CAddress
&addrIn
, uint64_t nKeyedNetGroupIn
, uint64_t nLocalHostNonceIn
, const std::string
&addrNameIn
= "", bool fInboundIn
= false);
687 void operator=(const CNode
&);
690 const uint64_t nLocalHostNonce
;
691 // Services offered to this peer
692 const ServiceFlags nLocalServices
;
693 const int nMyStartingHeight
;
695 std::list
<CNetMessage
> vRecvMsg
; // Used only by SocketHandler thread
698 NodeId
GetId() const {
702 uint64_t GetLocalNonce() const {
703 return nLocalHostNonce
;
706 int GetMyStartingHeight() const {
707 return nMyStartingHeight
;
712 assert(nRefCount
>= 0);
716 bool ReceiveMsgBytes(const char *pch
, unsigned int nBytes
, bool& complete
);
718 void SetRecvVersion(int nVersionIn
)
720 nRecvVersion
= nVersionIn
;
726 void SetSendVersion(int nVersionIn
);
727 int GetSendVersion() const;
742 void AddAddressKnown(const CAddress
& _addr
)
744 addrKnown
.insert(_addr
.GetKey());
747 void PushAddress(const CAddress
& _addr
, FastRandomContext
&insecure_rand
)
749 // Known checking here is only to save space from duplicates.
750 // SendMessages will filter it again for knowns that were added
751 // after addresses were pushed.
752 if (_addr
.IsValid() && !addrKnown
.contains(_addr
.GetKey())) {
753 if (vAddrToSend
.size() >= MAX_ADDR_TO_SEND
) {
754 vAddrToSend
[insecure_rand
.rand32() % vAddrToSend
.size()] = _addr
;
756 vAddrToSend
.push_back(_addr
);
762 void AddInventoryKnown(const CInv
& inv
)
766 filterInventoryKnown
.insert(inv
.hash
);
770 void PushInventory(const CInv
& inv
)
773 if (inv
.type
== MSG_TX
) {
774 if (!filterInventoryKnown
.contains(inv
.hash
)) {
775 setInventoryTxToSend
.insert(inv
.hash
);
777 } else if (inv
.type
== MSG_BLOCK
) {
778 vInventoryBlockToSend
.push_back(inv
.hash
);
782 void PushBlockHash(const uint256
&hash
)
785 vBlockHashesToAnnounce
.push_back(hash
);
788 void AskFor(const CInv
& inv
);
790 void CloseSocketDisconnect();
792 void copyStats(CNodeStats
&stats
);
794 ServiceFlags
GetLocalServices() const
796 return nLocalServices
;
804 /** Return a timestamp in the future (in microseconds) for exponentially distributed events. */
805 int64_t PoissonNextSend(int64_t nNow
, int average_interval_seconds
);
807 #endif // BITCOIN_NET_H