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litecoin/src/net.h

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2016 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_NET_H
#define BITCOIN_NET_H
#include <addrdb.h>
#include <addrman.h>
#include <amount.h>
#include <bloom.h>
#include <compat.h>
#include <hash.h>
#include <limitedmap.h>
#include <netaddress.h>
#include <policy/feerate.h>
#include <protocol.h>
#include <random.h>
#include <streams.h>
#include <sync.h>
#include <uint256.h>
#include <threadinterrupt.h>
#include <atomic>
#include <deque>
#include <stdint.h>
#include <thread>
#include <memory>
#include <condition_variable>
#ifndef WIN32
#include <arpa/inet.h>
#endif
class CScheduler;
class CNode;
namespace boost {
class thread_group;
} // namespace boost
/** Time between pings automatically sent out for latency probing and keepalive (in seconds). */
static const int PING_INTERVAL = 2 * 60;
/** Time after which to disconnect, after waiting for a ping response (or inactivity). */
static const int TIMEOUT_INTERVAL = 20 * 60;
/** Run the feeler connection loop once every 2 minutes or 120 seconds. **/
static const int FEELER_INTERVAL = 120;
/** The maximum number of entries in an 'inv' protocol message */
static const unsigned int MAX_INV_SZ = 50000;
/** The maximum number of new addresses to accumulate before announcing. */
static const unsigned int MAX_ADDR_TO_SEND = 1000;
/** Maximum length of incoming protocol messages (no message over 4 MB is currently acceptable). */
static const unsigned int MAX_PROTOCOL_MESSAGE_LENGTH = 4 * 1000 * 1000;
/** Maximum length of strSubVer in `version` message */
static const unsigned int MAX_SUBVERSION_LENGTH = 256;
/** Maximum number of automatic outgoing nodes */
static const int MAX_OUTBOUND_CONNECTIONS = 8;
/** Maximum number of addnode outgoing nodes */
static const int MAX_ADDNODE_CONNECTIONS = 8;
/** -listen default */
static const bool DEFAULT_LISTEN = true;
/** -upnp default */
#ifdef USE_UPNP
static const bool DEFAULT_UPNP = USE_UPNP;
#else
static const bool DEFAULT_UPNP = false;
#endif
/** The maximum number of entries in mapAskFor */
static const size_t MAPASKFOR_MAX_SZ = MAX_INV_SZ;
/** The maximum number of entries in setAskFor (larger due to getdata latency)*/
static const size_t SETASKFOR_MAX_SZ = 2 * MAX_INV_SZ;
/** The maximum number of peer connections to maintain. */
static const unsigned int DEFAULT_MAX_PEER_CONNECTIONS = 125;
/** The default for -maxuploadtarget. 0 = Unlimited */
static const uint64_t DEFAULT_MAX_UPLOAD_TARGET = 0;
/** The default timeframe for -maxuploadtarget. 1 day. */
static const uint64_t MAX_UPLOAD_TIMEFRAME = 60 * 60 * 24;
/** Default for blocks only*/
static const bool DEFAULT_BLOCKSONLY = false;
static const bool DEFAULT_FORCEDNSSEED = false;
static const size_t DEFAULT_MAXRECEIVEBUFFER = 5 * 1000;
static const size_t DEFAULT_MAXSENDBUFFER = 1 * 1000;
// NOTE: When adjusting this, update rpcnet:setban's help ("24h")
static const unsigned int DEFAULT_MISBEHAVING_BANTIME = 60 * 60 * 24; // Default 24-hour ban
typedef int64_t NodeId;
struct AddedNodeInfo
{
std::string strAddedNode;
CService resolvedAddress;
bool fConnected;
bool fInbound;
};
class CNodeStats;
class CClientUIInterface;
struct CSerializedNetMsg
{
CSerializedNetMsg() = default;
CSerializedNetMsg(CSerializedNetMsg&&) = default;
CSerializedNetMsg& operator=(CSerializedNetMsg&&) = default;
// No copying, only moves.
CSerializedNetMsg(const CSerializedNetMsg& msg) = delete;
CSerializedNetMsg& operator=(const CSerializedNetMsg&) = delete;
std::vector<unsigned char> data;
std::string command;
};
class NetEventsInterface;
class CConnman
{
public:
enum NumConnections {
CONNECTIONS_NONE = 0,
CONNECTIONS_IN = (1U << 0),
CONNECTIONS_OUT = (1U << 1),
CONNECTIONS_ALL = (CONNECTIONS_IN | CONNECTIONS_OUT),
};
struct Options
{
ServiceFlags nLocalServices = NODE_NONE;
int nMaxConnections = 0;
int nMaxOutbound = 0;
int nMaxAddnode = 0;
int nMaxFeeler = 0;
int nBestHeight = 0;
CClientUIInterface* uiInterface = nullptr;
NetEventsInterface* m_msgproc = nullptr;
unsigned int nSendBufferMaxSize = 0;
unsigned int nReceiveFloodSize = 0;
uint64_t nMaxOutboundTimeframe = 0;
uint64_t nMaxOutboundLimit = 0;
std::vector<std::string> vSeedNodes;
std::vector<CSubNet> vWhitelistedRange;
std::vector<CService> vBinds, vWhiteBinds;
bool m_use_addrman_outgoing = true;
std::vector<std::string> m_specified_outgoing;
std::vector<std::string> m_added_nodes;
};
void Init(const Options& connOptions) {
nLocalServices = connOptions.nLocalServices;
nMaxConnections = connOptions.nMaxConnections;
nMaxOutbound = std::min(connOptions.nMaxOutbound, connOptions.nMaxConnections);
nMaxAddnode = connOptions.nMaxAddnode;
nMaxFeeler = connOptions.nMaxFeeler;
nBestHeight = connOptions.nBestHeight;
clientInterface = connOptions.uiInterface;
m_msgproc = connOptions.m_msgproc;
nSendBufferMaxSize = connOptions.nSendBufferMaxSize;
nReceiveFloodSize = connOptions.nReceiveFloodSize;
{
LOCK(cs_totalBytesSent);
nMaxOutboundTimeframe = connOptions.nMaxOutboundTimeframe;
nMaxOutboundLimit = connOptions.nMaxOutboundLimit;
}
vWhitelistedRange = connOptions.vWhitelistedRange;
{
LOCK(cs_vAddedNodes);
vAddedNodes = connOptions.m_added_nodes;
}
}
CConnman(uint64_t seed0, uint64_t seed1);
~CConnman();
bool Start(CScheduler& scheduler, const Options& options);
void Stop();
void Interrupt();
bool GetNetworkActive() const { return fNetworkActive; };
void SetNetworkActive(bool active);
bool OpenNetworkConnection(const CAddress& addrConnect, bool fCountFailure, CSemaphoreGrant *grantOutbound = nullptr, const char *strDest = nullptr, bool fOneShot = false, bool fFeeler = false, bool manual_connection = false);
bool CheckIncomingNonce(uint64_t nonce);
bool ForNode(NodeId id, std::function<bool(CNode* pnode)> func);
void PushMessage(CNode* pnode, CSerializedNetMsg&& msg);
template<typename Callable>
void ForEachNode(Callable&& func)
{
LOCK(cs_vNodes);
for (auto&& node : vNodes) {
if (NodeFullyConnected(node))
func(node);
}
};
template<typename Callable>
void ForEachNode(Callable&& func) const
{
LOCK(cs_vNodes);
for (auto&& node : vNodes) {
if (NodeFullyConnected(node))
func(node);
}
};
template<typename Callable, typename CallableAfter>
void ForEachNodeThen(Callable&& pre, CallableAfter&& post)
{
LOCK(cs_vNodes);
for (auto&& node : vNodes) {
if (NodeFullyConnected(node))
pre(node);
}
post();
};
template<typename Callable, typename CallableAfter>
void ForEachNodeThen(Callable&& pre, CallableAfter&& post) const
{
LOCK(cs_vNodes);
for (auto&& node : vNodes) {
if (NodeFullyConnected(node))
pre(node);
}
post();
};
// Addrman functions
size_t GetAddressCount() const;
void SetServices(const CService &addr, ServiceFlags nServices);
void MarkAddressGood(const CAddress& addr);
void AddNewAddresses(const std::vector<CAddress>& vAddr, const CAddress& addrFrom, int64_t nTimePenalty = 0);
std::vector<CAddress> GetAddresses();
// Denial-of-service detection/prevention
// The idea is to detect peers that are behaving
// badly and disconnect/ban them, but do it in a
// one-coding-mistake-won't-shatter-the-entire-network
// way.
// IMPORTANT: There should be nothing I can give a
// node that it will forward on that will make that
// node's peers drop it. If there is, an attacker
// can isolate a node and/or try to split the network.
// Dropping a node for sending stuff that is invalid
// now but might be valid in a later version is also
// dangerous, because it can cause a network split
// between nodes running old code and nodes running
// new code.
void Ban(const CNetAddr& netAddr, const BanReason& reason, int64_t bantimeoffset = 0, bool sinceUnixEpoch = false);
void Ban(const CSubNet& subNet, const BanReason& reason, int64_t bantimeoffset = 0, bool sinceUnixEpoch = false);
void ClearBanned(); // needed for unit testing
bool IsBanned(CNetAddr ip);
bool IsBanned(CSubNet subnet);
bool Unban(const CNetAddr &ip);
bool Unban(const CSubNet &ip);
void GetBanned(banmap_t &banmap);
void SetBanned(const banmap_t &banmap);
// This allows temporarily exceeding nMaxOutbound, with the goal of finding
// a peer that is better than all our current peers.
void SetTryNewOutboundPeer(bool flag);
bool GetTryNewOutboundPeer();
// Return the number of outbound peers we have in excess of our target (eg,
// if we previously called SetTryNewOutboundPeer(true), and have since set
// to false, we may have extra peers that we wish to disconnect). This may
// return a value less than (num_outbound_connections - num_outbound_slots)
// in cases where some outbound connections are not yet fully connected, or
// not yet fully disconnected.
int GetExtraOutboundCount();
bool AddNode(const std::string& node);
bool RemoveAddedNode(const std::string& node);
std::vector<AddedNodeInfo> GetAddedNodeInfo();
size_t GetNodeCount(NumConnections num);
void GetNodeStats(std::vector<CNodeStats>& vstats);
bool DisconnectNode(const std::string& node);
bool DisconnectNode(NodeId id);
ServiceFlags GetLocalServices() const;
//!set the max outbound target in bytes
void SetMaxOutboundTarget(uint64_t limit);
uint64_t GetMaxOutboundTarget();
//!set the timeframe for the max outbound target
void SetMaxOutboundTimeframe(uint64_t timeframe);
uint64_t GetMaxOutboundTimeframe();
//!check if the outbound target is reached
// if param historicalBlockServingLimit is set true, the function will
// response true if the limit for serving historical blocks has been reached
bool OutboundTargetReached(bool historicalBlockServingLimit);
//!response the bytes left in the current max outbound cycle
// in case of no limit, it will always response 0
uint64_t GetOutboundTargetBytesLeft();
//!response the time in second left in the current max outbound cycle
// in case of no limit, it will always response 0
uint64_t GetMaxOutboundTimeLeftInCycle();
uint64_t GetTotalBytesRecv();
uint64_t GetTotalBytesSent();
void SetBestHeight(int height);
int GetBestHeight() const;
/** Get a unique deterministic randomizer. */
CSipHasher GetDeterministicRandomizer(uint64_t id) const;
unsigned int GetReceiveFloodSize() const;
void WakeMessageHandler();
private:
struct ListenSocket {
SOCKET socket;
bool whitelisted;
ListenSocket(SOCKET socket_, bool whitelisted_) : socket(socket_), whitelisted(whitelisted_) {}
};
bool BindListenPort(const CService &bindAddr, std::string& strError, bool fWhitelisted = false);
bool Bind(const CService &addr, unsigned int flags);
bool InitBinds(const std::vector<CService>& binds, const std::vector<CService>& whiteBinds);
void ThreadOpenAddedConnections();
void AddOneShot(const std::string& strDest);
void ProcessOneShot();
void ThreadOpenConnections(std::vector<std::string> connect);
void ThreadMessageHandler();
void AcceptConnection(const ListenSocket& hListenSocket);
void ThreadSocketHandler();
void ThreadDNSAddressSeed();
uint64_t CalculateKeyedNetGroup(const CAddress& ad) const;
CNode* FindNode(const CNetAddr& ip);
CNode* FindNode(const CSubNet& subNet);
CNode* FindNode(const std::string& addrName);
CNode* FindNode(const CService& addr);
bool AttemptToEvictConnection();
CNode* ConnectNode(CAddress addrConnect, const char *pszDest, bool fCountFailure);
bool IsWhitelistedRange(const CNetAddr &addr);
void DeleteNode(CNode* pnode);
NodeId GetNewNodeId();
size_t SocketSendData(CNode *pnode) const;
//!check is the banlist has unwritten changes
bool BannedSetIsDirty();
//!set the "dirty" flag for the banlist
void SetBannedSetDirty(bool dirty=true);
//!clean unused entries (if bantime has expired)
void SweepBanned();
void DumpAddresses();
void DumpData();
void DumpBanlist();
// Network stats
void RecordBytesRecv(uint64_t bytes);
void RecordBytesSent(uint64_t bytes);
// Whether the node should be passed out in ForEach* callbacks
static bool NodeFullyConnected(const CNode* pnode);
// Network usage totals
CCriticalSection cs_totalBytesRecv;
CCriticalSection cs_totalBytesSent;
uint64_t nTotalBytesRecv GUARDED_BY(cs_totalBytesRecv);
uint64_t nTotalBytesSent GUARDED_BY(cs_totalBytesSent);
// outbound limit & stats
uint64_t nMaxOutboundTotalBytesSentInCycle GUARDED_BY(cs_totalBytesSent);
uint64_t nMaxOutboundCycleStartTime GUARDED_BY(cs_totalBytesSent);
uint64_t nMaxOutboundLimit GUARDED_BY(cs_totalBytesSent);
uint64_t nMaxOutboundTimeframe GUARDED_BY(cs_totalBytesSent);
// Whitelisted ranges. Any node connecting from these is automatically
// whitelisted (as well as those connecting to whitelisted binds).
std::vector<CSubNet> vWhitelistedRange;
unsigned int nSendBufferMaxSize;
unsigned int nReceiveFloodSize;
std::vector<ListenSocket> vhListenSocket;
std::atomic<bool> fNetworkActive;
banmap_t setBanned;
CCriticalSection cs_setBanned;
bool setBannedIsDirty;
bool fAddressesInitialized;
CAddrMan addrman;
std::deque<std::string> vOneShots;
CCriticalSection cs_vOneShots;
std::vector<std::string> vAddedNodes GUARDED_BY(cs_vAddedNodes);
CCriticalSection cs_vAddedNodes;
std::vector<CNode*> vNodes;
std::list<CNode*> vNodesDisconnected;
mutable CCriticalSection cs_vNodes;
std::atomic<NodeId> nLastNodeId;
/** Services this instance offers */
ServiceFlags nLocalServices;
std::unique_ptr<CSemaphore> semOutbound;
std::unique_ptr<CSemaphore> semAddnode;
int nMaxConnections;
int nMaxOutbound;
int nMaxAddnode;
int nMaxFeeler;
std::atomic<int> nBestHeight;
CClientUIInterface* clientInterface;
NetEventsInterface* m_msgproc;
/** SipHasher seeds for deterministic randomness */
const uint64_t nSeed0, nSeed1;
/** flag for waking the message processor. */
bool fMsgProcWake;
std::condition_variable condMsgProc;
std::mutex mutexMsgProc;
std::atomic<bool> flagInterruptMsgProc;
CThreadInterrupt interruptNet;
std::thread threadDNSAddressSeed;
std::thread threadSocketHandler;
std::thread threadOpenAddedConnections;
std::thread threadOpenConnections;
std::thread threadMessageHandler;
/** flag for deciding to connect to an extra outbound peer,
* in excess of nMaxOutbound
* This takes the place of a feeler connection */
std::atomic_bool m_try_another_outbound_peer;
friend struct CConnmanTest;
};
extern std::unique_ptr<CConnman> g_connman;
void Discover(boost::thread_group& threadGroup);
void MapPort(bool fUseUPnP);
unsigned short GetListenPort();
bool BindListenPort(const CService &bindAddr, std::string& strError, bool fWhitelisted = false);
struct CombinerAll
{
typedef bool result_type;
template<typename I>
bool operator()(I first, I last) const
{
while (first != last) {
if (!(*first)) return false;
++first;
}
return true;
}
};
/**
* Interface for message handling
*/
class NetEventsInterface
{
public:
virtual bool ProcessMessages(CNode* pnode, std::atomic<bool>& interrupt) = 0;
virtual bool SendMessages(CNode* pnode, std::atomic<bool>& interrupt) = 0;
virtual void InitializeNode(CNode* pnode) = 0;
virtual void FinalizeNode(NodeId id, bool& update_connection_time) = 0;
};
enum
{
LOCAL_NONE, // unknown
LOCAL_IF, // address a local interface listens on
LOCAL_BIND, // address explicit bound to
LOCAL_UPNP, // address reported by UPnP
LOCAL_MANUAL, // address explicitly specified (-externalip=)
LOCAL_MAX
};
bool IsPeerAddrLocalGood(CNode *pnode);
void AdvertiseLocal(CNode *pnode);
void SetLimited(enum Network net, bool fLimited = true);
bool IsLimited(enum Network net);
bool IsLimited(const CNetAddr& addr);
bool AddLocal(const CService& addr, int nScore = LOCAL_NONE);
bool AddLocal(const CNetAddr& addr, int nScore = LOCAL_NONE);
bool RemoveLocal(const CService& addr);
bool SeenLocal(const CService& addr);
bool IsLocal(const CService& addr);
bool GetLocal(CService &addr, const CNetAddr *paddrPeer = nullptr);
bool IsReachable(enum Network net);
bool IsReachable(const CNetAddr &addr);
CAddress GetLocalAddress(const CNetAddr *paddrPeer, ServiceFlags nLocalServices);
extern bool fDiscover;
extern bool fListen;
extern bool fRelayTxes;
extern limitedmap<uint256, int64_t> mapAlreadyAskedFor;
/** Subversion as sent to the P2P network in `version` messages */
extern std::string strSubVersion;
struct LocalServiceInfo {
int nScore;
int nPort;
};
extern CCriticalSection cs_mapLocalHost;
extern std::map<CNetAddr, LocalServiceInfo> mapLocalHost;
typedef std::map<std::string, uint64_t> mapMsgCmdSize; //command, total bytes
class CNodeStats
{
public:
NodeId nodeid;
ServiceFlags nServices;
bool fRelayTxes;
int64_t nLastSend;
int64_t nLastRecv;
int64_t nTimeConnected;
int64_t nTimeOffset;
std::string addrName;
int nVersion;
std::string cleanSubVer;
bool fInbound;
bool m_manual_connection;
int nStartingHeight;
uint64_t nSendBytes;
mapMsgCmdSize mapSendBytesPerMsgCmd;
uint64_t nRecvBytes;
mapMsgCmdSize mapRecvBytesPerMsgCmd;
bool fWhitelisted;
double dPingTime;
double dPingWait;
double dMinPing;
// Our address, as reported by the peer
std::string addrLocal;
// Address of this peer
CAddress addr;
// Bind address of our side of the connection
CAddress addrBind;
};
class CNetMessage {
private:
mutable CHash256 hasher;
mutable uint256 data_hash;
public:
bool in_data; // parsing header (false) or data (true)
CDataStream hdrbuf; // partially received header
CMessageHeader hdr; // complete header
unsigned int nHdrPos;
CDataStream vRecv; // received message data
unsigned int nDataPos;
int64_t nTime; // time (in microseconds) of message receipt.
CNetMessage(const CMessageHeader::MessageStartChars& pchMessageStartIn, int nTypeIn, int nVersionIn) : hdrbuf(nTypeIn, nVersionIn), hdr(pchMessageStartIn), vRecv(nTypeIn, nVersionIn) {
hdrbuf.resize(24);
in_data = false;
nHdrPos = 0;
nDataPos = 0;
nTime = 0;
}
bool complete() const
{
if (!in_data)
return false;
return (hdr.nMessageSize == nDataPos);
}
const uint256& GetMessageHash() const;
void SetVersion(int nVersionIn)
{
hdrbuf.SetVersion(nVersionIn);
vRecv.SetVersion(nVersionIn);
}
int readHeader(const char *pch, unsigned int nBytes);
int readData(const char *pch, unsigned int nBytes);
};
/** Information about a peer */
class CNode
{
friend class CConnman;
public:
// socket
std::atomic<ServiceFlags> nServices;
SOCKET hSocket;
size_t nSendSize; // total size of all vSendMsg entries
size_t nSendOffset; // offset inside the first vSendMsg already sent
uint64_t nSendBytes;
std::deque<std::vector<unsigned char>> vSendMsg;
CCriticalSection cs_vSend;
CCriticalSection cs_hSocket;
CCriticalSection cs_vRecv;
CCriticalSection cs_vProcessMsg;
std::list<CNetMessage> vProcessMsg;
size_t nProcessQueueSize;
CCriticalSection cs_sendProcessing;
std::deque<CInv> vRecvGetData;
uint64_t nRecvBytes;
std::atomic<int> nRecvVersion;
std::atomic<int64_t> nLastSend;
std::atomic<int64_t> nLastRecv;
const int64_t nTimeConnected;
std::atomic<int64_t> nTimeOffset;
// Address of this peer
const CAddress addr;
// Bind address of our side of the connection
const CAddress addrBind;
std::atomic<int> nVersion;
// strSubVer is whatever byte array we read from the wire. However, this field is intended
// to be printed out, displayed to humans in various forms and so on. So we sanitize it and
// store the sanitized version in cleanSubVer. The original should be used when dealing with
// the network or wire types and the cleaned string used when displayed or logged.
std::string strSubVer, cleanSubVer;
CCriticalSection cs_SubVer; // used for both cleanSubVer and strSubVer
bool fWhitelisted; // This peer can bypass DoS banning.
bool fFeeler; // If true this node is being used as a short lived feeler.
bool fOneShot;
bool m_manual_connection;
bool fClient;
const bool fInbound;
std::atomic_bool fSuccessfullyConnected;
std::atomic_bool fDisconnect;
// We use fRelayTxes for two purposes -
// a) it allows us to not relay tx invs before receiving the peer's version message
// b) the peer may tell us in its version message that we should not relay tx invs
// unless it loads a bloom filter.
bool fRelayTxes; //protected by cs_filter
bool fSentAddr;
CSemaphoreGrant grantOutbound;
CCriticalSection cs_filter;
std::unique_ptr<CBloomFilter> pfilter;
std::atomic<int> nRefCount;
const uint64_t nKeyedNetGroup;
std::atomic_bool fPauseRecv;
std::atomic_bool fPauseSend;
protected:
mapMsgCmdSize mapSendBytesPerMsgCmd;
mapMsgCmdSize mapRecvBytesPerMsgCmd;
public:
uint256 hashContinue;
std::atomic<int> nStartingHeight;
// flood relay
std::vector<CAddress> vAddrToSend;
CRollingBloomFilter addrKnown;
bool fGetAddr;
std::set<uint256> setKnown;
int64_t nNextAddrSend;
int64_t nNextLocalAddrSend;
// inventory based relay
CRollingBloomFilter filterInventoryKnown;
// Set of transaction ids we still have to announce.
// They are sorted by the mempool before relay, so the order is not important.
std::set<uint256> setInventoryTxToSend;
// List of block ids we still have announce.
// There is no final sorting before sending, as they are always sent immediately
// and in the order requested.
std::vector<uint256> vInventoryBlockToSend;
CCriticalSection cs_inventory;
std::set<uint256> setAskFor;
std::multimap<int64_t, CInv> mapAskFor;
int64_t nNextInvSend;
// Used for headers announcements - unfiltered blocks to relay
// Also protected by cs_inventory
std::vector<uint256> vBlockHashesToAnnounce;
// Used for BIP35 mempool sending, also protected by cs_inventory
bool fSendMempool;
// Last time a "MEMPOOL" request was serviced.
std::atomic<int64_t> timeLastMempoolReq;
// Block and TXN accept times
std::atomic<int64_t> nLastBlockTime;
std::atomic<int64_t> nLastTXTime;
// Ping time measurement:
// The pong reply we're expecting, or 0 if no pong expected.
std::atomic<uint64_t> nPingNonceSent;
// Time (in usec) the last ping was sent, or 0 if no ping was ever sent.
std::atomic<int64_t> nPingUsecStart;
// Last measured round-trip time.
std::atomic<int64_t> nPingUsecTime;
// Best measured round-trip time.
std::atomic<int64_t> nMinPingUsecTime;
// Whether a ping is requested.
std::atomic<bool> fPingQueued;
// Minimum fee rate with which to filter inv's to this node
CAmount minFeeFilter;
CCriticalSection cs_feeFilter;
CAmount lastSentFeeFilter;
int64_t nextSendTimeFeeFilter;
CNode(NodeId id, ServiceFlags nLocalServicesIn, int nMyStartingHeightIn, SOCKET hSocketIn, const CAddress &addrIn, uint64_t nKeyedNetGroupIn, uint64_t nLocalHostNonceIn, const CAddress &addrBindIn, const std::string &addrNameIn = "", bool fInboundIn = false);
~CNode();
CNode(const CNode&) = delete;
CNode& operator=(const CNode&) = delete;
private:
const NodeId id;
const uint64_t nLocalHostNonce;
// Services offered to this peer
const ServiceFlags nLocalServices;
const int nMyStartingHeight;
int nSendVersion;
std::list<CNetMessage> vRecvMsg; // Used only by SocketHandler thread
mutable CCriticalSection cs_addrName;
std::string addrName;
// Our address, as reported by the peer
CService addrLocal;
mutable CCriticalSection cs_addrLocal;
public:
NodeId GetId() const {
return id;
}
uint64_t GetLocalNonce() const {
return nLocalHostNonce;
}
int GetMyStartingHeight() const {
return nMyStartingHeight;
}
int GetRefCount() const
{
assert(nRefCount >= 0);
return nRefCount;
}
bool ReceiveMsgBytes(const char *pch, unsigned int nBytes, bool& complete);
void SetRecvVersion(int nVersionIn)
{
nRecvVersion = nVersionIn;
}
int GetRecvVersion() const
{
return nRecvVersion;
}
void SetSendVersion(int nVersionIn);
int GetSendVersion() const;
CService GetAddrLocal() const;
//! May not be called more than once
void SetAddrLocal(const CService& addrLocalIn);
CNode* AddRef()
{
nRefCount++;
return this;
}
void Release()
{
nRefCount--;
}
void AddAddressKnown(const CAddress& _addr)
{
addrKnown.insert(_addr.GetKey());
}
void PushAddress(const CAddress& _addr, FastRandomContext &insecure_rand)
{
// Known checking here is only to save space from duplicates.
// SendMessages will filter it again for knowns that were added
// after addresses were pushed.
if (_addr.IsValid() && !addrKnown.contains(_addr.GetKey())) {
if (vAddrToSend.size() >= MAX_ADDR_TO_SEND) {
vAddrToSend[insecure_rand.randrange(vAddrToSend.size())] = _addr;
} else {
vAddrToSend.push_back(_addr);
}
}
}
void AddInventoryKnown(const CInv& inv)
{
{
LOCK(cs_inventory);
filterInventoryKnown.insert(inv.hash);
}
}
void PushInventory(const CInv& inv)
{
LOCK(cs_inventory);
if (inv.type == MSG_TX) {
if (!filterInventoryKnown.contains(inv.hash)) {
setInventoryTxToSend.insert(inv.hash);
}
} else if (inv.type == MSG_BLOCK) {
vInventoryBlockToSend.push_back(inv.hash);
}
}
void PushBlockHash(const uint256 &hash)
{
LOCK(cs_inventory);
vBlockHashesToAnnounce.push_back(hash);
}
void AskFor(const CInv& inv);
void CloseSocketDisconnect();
void copyStats(CNodeStats &stats);
ServiceFlags GetLocalServices() const
{
return nLocalServices;
}
std::string GetAddrName() const;
//! Sets the addrName only if it was not previously set
void MaybeSetAddrName(const std::string& addrNameIn);
};
/** Return a timestamp in the future (in microseconds) for exponentially distributed events. */
int64_t PoissonNextSend(int64_t nNow, int average_interval_seconds);
#endif // BITCOIN_NET_H
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