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CConnman Class Reference

#include <net.h>

Collaboration diagram for CConnman:
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Classes

struct  CachedAddrResponse
 Cache responses to addr requests to minimize privacy leak. More...
 
struct  ListenSocket
 
struct  Options
 

Public Types

enum  NumConnections { CONNECTIONS_NONE = 0 , CONNECTIONS_IN = (1U << 0) , CONNECTIONS_OUT = (1U << 1) , CONNECTIONS_ALL = (CONNECTIONS_IN | CONNECTIONS_OUT) }
 
using NodeFn = std::function< void(CNode *)>
 

Public Member Functions

void Init (const Options &connOptions)
 
 CConnman (const Config &configIn, uint64_t seed0, uint64_t seed1, AddrMan &addrmanIn, bool network_active=true)
 
 ~CConnman ()
 
bool Start (CScheduler &scheduler, const Options &options)
 
void StopThreads ()
 
void StopNodes ()
 
void Stop ()
 
void Interrupt ()
 
bool GetNetworkActive () const
 
bool GetUseAddrmanOutgoing () const
 
void SetNetworkActive (bool active)
 
void OpenNetworkConnection (const CAddress &addrConnect, bool fCountFailure, CSemaphoreGrant *grantOutbound, const char *strDest, ConnectionType conn_type)
 
bool CheckIncomingNonce (uint64_t nonce)
 
bool ForNode (NodeId id, std::function< bool(CNode *pnode)> func)
 
void PushMessage (CNode *pnode, CSerializedNetMsg &&msg)
 
void ForEachNode (const NodeFn &func)
 
void ForEachNode (const NodeFn &func) const
 
std::vector< CAddressGetAddresses (size_t max_addresses, size_t max_pct, std::optional< Network > network) const
 Return all or many randomly selected addresses, optionally by network. More...
 
std::vector< CAddressGetAddresses (CNode &requestor, size_t max_addresses, size_t max_pct)
 Cache is used to minimize topology leaks, so it should be used for all non-trusted calls, for example, p2p. More...
 
void SetTryNewOutboundPeer (bool flag)
 
bool GetTryNewOutboundPeer () const
 
void StartExtraBlockRelayPeers ()
 
int GetExtraFullOutboundCount () const
 
int GetExtraBlockRelayCount () const
 
bool AddNode (const std::string &node)
 
bool RemoveAddedNode (const std::string &node)
 
std::vector< AddedNodeInfoGetAddedNodeInfo () const
 
bool AddConnection (const std::string &address, ConnectionType conn_type)
 Attempts to open a connection. More...
 
size_t GetNodeCount (NumConnections num) const
 
void GetNodeStats (std::vector< CNodeStats > &vstats) const
 
bool DisconnectNode (const std::string &node)
 
bool DisconnectNode (const CSubNet &subnet)
 
bool DisconnectNode (const CNetAddr &addr)
 
bool DisconnectNode (NodeId id)
 
ServiceFlags GetLocalServices () const
 Used to convey which local services we are offering peers during node connection. More...
 
uint64_t GetMaxOutboundTarget () const
 
std::chrono::seconds GetMaxOutboundTimeframe () const
 
bool OutboundTargetReached (bool historicalBlockServingLimit) const
 check if the outbound target is reached. More...
 
uint64_t GetOutboundTargetBytesLeft () const
 response the bytes left in the current max outbound cycle in case of no limit, it will always response 0 More...
 
std::chrono::seconds GetMaxOutboundTimeLeftInCycle () const
 returns the time in second left in the current max outbound cycle in case of no limit, it will always return 0 More...
 
uint64_t GetTotalBytesRecv () const
 
uint64_t GetTotalBytesSent () const
 
CSipHasher GetDeterministicRandomizer (uint64_t id) const
 Get a unique deterministic randomizer. More...
 
unsigned int GetReceiveFloodSize () const
 
void WakeMessageHandler ()
 
std::chrono::microseconds PoissonNextSendInbound (std::chrono::microseconds now, std::chrono::seconds average_interval)
 Attempts to obfuscate tx time through exponentially distributed emitting. More...
 
bool ShouldRunInactivityChecks (const CNode &node, std::chrono::seconds now) const
 Return true if we should disconnect the peer for failing an inactivity check. More...
 

Private Member Functions

bool BindListenPort (const CService &bindAddr, bilingual_str &strError, NetPermissionFlags permissions)
 
bool Bind (const CService &addr, unsigned int flags, NetPermissionFlags permissions)
 
bool InitBinds (const Options &options)
 
void ThreadOpenAddedConnections ()
 
void AddAddrFetch (const std::string &strDest)
 
void ProcessAddrFetch ()
 
void ThreadOpenConnections (std::vector< std::string > connect, std::function< void(const CAddress &, ConnectionType)> mockOpenConnection)
 
void ThreadMessageHandler ()
 
void ThreadI2PAcceptIncoming ()
 
void AcceptConnection (const ListenSocket &hListenSocket)
 
void CreateNodeFromAcceptedSocket (SOCKET hSocket, 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 vNodes member. More...
 
void DisconnectNodes ()
 
void NotifyNumConnectionsChanged ()
 
bool InactivityCheck (const CNode &node) const
 Return true if the peer is inactive and should be disconnected. More...
 
bool GenerateSelectSet (std::set< SOCKET > &recv_set, std::set< SOCKET > &send_set, std::set< SOCKET > &error_set)
 
void SocketEvents (std::set< SOCKET > &recv_set, std::set< SOCKET > &send_set, std::set< SOCKET > &error_set)
 
void SocketHandler ()
 
void ThreadSocketHandler ()
 
void ThreadDNSAddressSeed ()
 
uint64_t CalculateKeyedNetGroup (const CAddress &ad) const
 
CNodeFindNode (const CNetAddr &ip)
 
CNodeFindNode (const CSubNet &subNet)
 
CNodeFindNode (const std::string &addrName)
 
CNodeFindNode (const CService &addr)
 
bool AlreadyConnectedToAddress (const CAddress &addr)
 Determine whether we're already connected to a given address, in order to avoid initiating duplicate connections. More...
 
bool AttemptToEvictConnection ()
 Try to find a connection to evict when the node is full. More...
 
CNodeConnectNode (CAddress addrConnect, const char *pszDest, bool fCountFailure, ConnectionType conn_type)
 
void AddWhitelistPermissionFlags (NetPermissionFlags &flags, const CNetAddr &addr) const
 
void DeleteNode (CNode *pnode)
 
NodeId GetNewNodeId ()
 
size_t SocketSendData (CNode &node) const EXCLUSIVE_LOCKS_REQUIRED(node.cs_vSend)
 
void DumpAddresses ()
 
void RecordBytesRecv (uint64_t bytes)
 
void RecordBytesSent (uint64_t bytes)
 
std::vector< CAddressGetCurrentBlockRelayOnlyConns () const
 Return vector of current BLOCK_RELAY peers. More...
 
uint64_t nTotalBytesRecv GUARDED_BY (cs_totalBytesRecv)
 
uint64_t nTotalBytesSent GUARDED_BY (cs_totalBytesSent)
 
uint64_t nMaxOutboundTotalBytesSentInCycle GUARDED_BY (cs_totalBytesSent)
 
std::chrono::seconds nMaxOutboundCycleStartTime GUARDED_BY (cs_totalBytesSent)
 
uint64_t nMaxOutboundLimit GUARDED_BY (cs_totalBytesSent)
 
std::deque< std::string > m_addr_fetches GUARDED_BY (m_addr_fetches_mutex)
 
std::vector< std::string > vAddedNodes GUARDED_BY (cs_vAddedNodes)
 
std::vector< CNode * > vNodes GUARDED_BY (cs_vNodes)
 
bool fMsgProcWake GUARDED_BY (mutexMsgProc)
 flag for waking the message processor. More...
 

Static Private Member Functions

static bool NodeFullyConnected (const CNode *pnode)
 

Private Attributes

const Configconfig
 
RecursiveMutex cs_totalBytesRecv
 
RecursiveMutex cs_totalBytesSent
 
std::chrono::seconds m_peer_connect_timeout
 
std::vector< NetWhitelistPermissionsvWhitelistedRange
 
unsigned int nSendBufferMaxSize {0}
 
unsigned int nReceiveFloodSize {0}
 
std::vector< ListenSocketvhListenSocket
 
std::atomic< bool > fNetworkActive {true}
 
bool fAddressesInitialized {false}
 
AddrManaddrman
 
RecursiveMutex m_addr_fetches_mutex
 
RecursiveMutex cs_vAddedNodes
 
std::list< CNode * > vNodesDisconnected
 
RecursiveMutex cs_vNodes
 
std::atomic< NodeIdnLastNodeId {0}
 
unsigned int nPrevNodeCount {0}
 
std::map< uint64_t, CachedAddrResponsem_addr_response_caches
 Addr responses stored in different caches per (network, local socket) prevent cross-network node identification. More...
 
ServiceFlags nLocalServices
 Services this instance offers. More...
 
std::unique_ptr< CSemaphoresemOutbound
 
std::unique_ptr< CSemaphoresemAddnode
 
int nMaxConnections
 
int m_max_outbound_full_relay
 
int m_max_outbound_block_relay
 
int m_max_avalanche_outbound
 
int nMaxAddnode
 
int nMaxFeeler
 
int m_max_outbound
 
bool m_use_addrman_outgoing
 
CClientUIInterfaceclientInterface
 
std::vector< NetEventsInterface * > m_msgproc
 
BanManm_banman
 Pointer to this node's banman. More...
 
std::vector< CAddressm_anchors
 Addresses that were saved during the previous clean shutdown. More...
 
const uint64_t nSeed0
 SipHasher seeds for deterministic randomness. More...
 
const uint64_t nSeed1
 
std::condition_variable condMsgProc
 
Mutex mutexMsgProc
 
std::atomic< bool > flagInterruptMsgProc {false}
 
CThreadInterrupt interruptNet
 This is signaled when network activity should cease. More...
 
std::unique_ptr< i2p::sam::Sessionm_i2p_sam_session
 I2P SAM session. More...
 
std::thread threadDNSAddressSeed
 
std::thread threadSocketHandler
 
std::thread threadOpenAddedConnections
 
std::thread threadOpenConnections
 
std::thread threadMessageHandler
 
std::thread threadI2PAcceptIncoming
 
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. More...
 
std::atomic_bool m_start_extra_block_relay_peers {false}
 flag for initiating extra block-relay-only peer connections. More...
 
std::atomic< std::chrono::microseconds > m_next_send_inv_to_incoming {0us}
 
std::vector< CServicem_onion_binds
 A vector of -bind=<address>:<port>=onion arguments each of which is an address and port that are designated for incoming Tor connections. More...
 

Friends

struct ::CConnmanTest
 
struct ConnmanTestMsg
 

Detailed Description

Definition at line 923 of file net.h.

Member Typedef Documentation

◆ NodeFn

using CConnman::NodeFn = std::function<void(CNode *)>

Definition at line 1025 of file net.h.

Member Enumeration Documentation

◆ NumConnections

Enumerator
CONNECTIONS_NONE 
CONNECTIONS_IN 
CONNECTIONS_OUT 
CONNECTIONS_ALL 

Definition at line 925 of file net.h.

Constructor & Destructor Documentation

◆ CConnman()

CConnman::CConnman ( const Config configIn,
uint64_t  seed0,
uint64_t  seed1,
AddrMan addrmanIn,
bool  network_active = true 
)

Definition at line 2847 of file net.cpp.

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◆ ~CConnman()

CConnman::~CConnman ( )

Definition at line 3141 of file net.cpp.

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Member Function Documentation

◆ AcceptConnection()

void CConnman::AcceptConnection ( const ListenSocket hListenSocket)
private

Definition at line 1250 of file net.cpp.

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◆ AddAddrFetch()

void CConnman::AddAddrFetch ( const std::string &  strDest)
private

Definition at line 129 of file net.cpp.

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◆ AddConnection()

bool CConnman::AddConnection ( const std::string &  address,
ConnectionType  conn_type 
)

Attempts to open a connection.

Currently only used from tests.

Parameters
[in]addressAddress of node to try connecting to
[in]conn_typeConnectionType::OUTBOUND, ConnectionType::BLOCK_RELAY, ConnectionType::ADDR_FETCH, or ConnectionType::FEELER
Returns
bool Returns false if there are no available slots for this connection:
  • conn_type not a supported ConnectionType
  • Max total outbound connection capacity filled
  • Max connection capacity for type is filled

Definition at line 1405 of file net.cpp.

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◆ AddNode()

bool CConnman::AddNode ( const std::string &  node)

Definition at line 3213 of file net.cpp.

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◆ AddWhitelistPermissionFlags()

void CConnman::AddWhitelistPermissionFlags ( NetPermissionFlags flags,
const CNetAddr addr 
) const
private

Definition at line 531 of file net.cpp.

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◆ AlreadyConnectedToAddress()

bool CConnman::AlreadyConnectedToAddress ( const CAddress addr)
private

Determine whether we're already connected to a given address, in order to avoid initiating duplicate connections.

Definition at line 352 of file net.cpp.

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◆ AttemptToEvictConnection()

bool CConnman::AttemptToEvictConnection ( )
private

Try to find a connection to evict when the node is full.

Extreme care must be taken to avoid opening the node to attacker triggered network partitioning. The strategy used here is to protect a small number of peers for each of several distinct characteristics which are difficult to forge. In order to partition a node the attacker must be simultaneously better at all of them than honest peers.

Definition at line 1189 of file net.cpp.

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◆ Bind()

bool CConnman::Bind ( const CService addr,
unsigned int  flags,
NetPermissionFlags  permissions 
)
private

Definition at line 2862 of file net.cpp.

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◆ BindListenPort()

bool CConnman::BindListenPort ( const CService bindAddr,
bilingual_str strError,
NetPermissionFlags  permissions 
)
private

Definition at line 2708 of file net.cpp.

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◆ CalculateKeyedNetGroup()

uint64_t CConnman::CalculateKeyedNetGroup ( const CAddress ad) const
private

Definition at line 3574 of file net.cpp.

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◆ CheckIncomingNonce()

bool CConnman::CheckIncomingNonce ( uint64_t  nonce)

Definition at line 357 of file net.cpp.

◆ ConnectNode()

CNode * CConnman::ConnectNode ( CAddress  addrConnect,
const char *  pszDest,
bool  fCountFailure,
ConnectionType  conn_type 
)
private

debug print

Definition at line 384 of file net.cpp.

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◆ CreateNodeFromAcceptedSocket()

void CConnman::CreateNodeFromAcceptedSocket ( SOCKET  hSocket,
NetPermissionFlags  permissionFlags,
const CAddress addr_bind,
const CAddress addr 
)
private

Create a CNode object from a socket that has just been accepted and add the node to the vNodes member.

Parameters
[in]hSocketConnected socket to communicate with the peer.
[in]permissionFlagsThe peer's permissions.
[in]addr_bindThe address and port at our side of the connection.
[in]addrThe address and port at the peer's side of the connection

Definition at line 1278 of file net.cpp.

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◆ DeleteNode()

void CConnman::DeleteNode ( CNode pnode)
private

Definition at line 3133 of file net.cpp.

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◆ DisconnectNode() [1/4]

bool CConnman::DisconnectNode ( const CNetAddr addr)

Definition at line 3294 of file net.cpp.

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◆ DisconnectNode() [2/4]

bool CConnman::DisconnectNode ( const CSubNet subnet)

Definition at line 3278 of file net.cpp.

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◆ DisconnectNode() [3/4]

bool CConnman::DisconnectNode ( const std::string &  node)

Definition at line 3266 of file net.cpp.

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◆ DisconnectNode() [4/4]

bool CConnman::DisconnectNode ( NodeId  id)

Definition at line 3298 of file net.cpp.

◆ DisconnectNodes()

void CConnman::DisconnectNodes ( )
private

Definition at line 1453 of file net.cpp.

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◆ DumpAddresses()

void CConnman::DumpAddresses ( )
private

Definition at line 2043 of file net.cpp.

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◆ FindNode() [1/4]

CNode * CConnman::FindNode ( const CNetAddr ip)
private

Definition at line 312 of file net.cpp.

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◆ FindNode() [2/4]

CNode * CConnman::FindNode ( const CService addr)
private

Definition at line 342 of file net.cpp.

◆ FindNode() [3/4]

CNode * CConnman::FindNode ( const CSubNet subNet)
private

Definition at line 322 of file net.cpp.

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◆ FindNode() [4/4]

CNode * CConnman::FindNode ( const std::string &  addrName)
private

Definition at line 332 of file net.cpp.

◆ ForEachNode() [1/2]

void CConnman::ForEachNode ( const NodeFn func)
inline

Definition at line 1026 of file net.h.

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◆ ForEachNode() [2/2]

void CConnman::ForEachNode ( const NodeFn func) const
inline

Definition at line 1035 of file net.h.

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◆ ForNode()

bool CConnman::ForNode ( NodeId  id,
std::function< bool(CNode *pnode)>  func 
)

Definition at line 3536 of file net.cpp.

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◆ GenerateSelectSet()

bool CConnman::GenerateSelectSet ( std::set< SOCKET > &  recv_set,
std::set< SOCKET > &  send_set,
std::set< SOCKET > &  error_set 
)
private

Definition at line 1570 of file net.cpp.

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◆ GetAddedNodeInfo()

std::vector< AddedNodeInfo > CConnman::GetAddedNodeInfo ( ) const

Definition at line 2473 of file net.cpp.

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◆ GetAddresses() [1/2]

std::vector< CAddress > CConnman::GetAddresses ( CNode requestor,
size_t  max_addresses,
size_t  max_pct 
)

Cache is used to minimize topology leaks, so it should be used for all non-trusted calls, for example, p2p.

A non-malicious call (from RPC or a peer with addr permission) should call the function without a parameter to avoid using the cache.

Definition at line 3164 of file net.cpp.

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◆ GetAddresses() [2/2]

std::vector< CAddress > CConnman::GetAddresses ( size_t  max_addresses,
size_t  max_pct,
std::optional< Network network 
) const

Return all or many randomly selected addresses, optionally by network.

Parameters
[in]max_addressesMaximum number of addresses to return (0 = all).
[in]max_pctMaximum percentage of addresses to return (0 = all).
[in]networkSelect only addresses of this network (nullopt = all).

Definition at line 3147 of file net.cpp.

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◆ GetCurrentBlockRelayOnlyConns()

std::vector< CAddress > CConnman::GetCurrentBlockRelayOnlyConns ( ) const
private

Return vector of current BLOCK_RELAY peers.

Definition at line 2461 of file net.cpp.

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◆ GetDeterministicRandomizer()

CSipHasher CConnman::GetDeterministicRandomizer ( uint64_t  id) const

Get a unique deterministic randomizer.

Definition at line 3570 of file net.cpp.

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◆ GetExtraBlockRelayCount()

int CConnman::GetExtraBlockRelayCount ( ) const

Definition at line 2102 of file net.cpp.

◆ GetExtraFullOutboundCount()

int CConnman::GetExtraFullOutboundCount ( ) const

Definition at line 2086 of file net.cpp.

◆ GetLocalServices()

ServiceFlags CConnman::GetLocalServices ( ) const

Used to convey which local services we are offering peers during node connection.

The data returned by this is used in CNode construction, which is used to advertise which services we are offering that peer during net_processing.cpp:PushNodeVersion().

Definition at line 3400 of file net.cpp.

◆ GetMaxOutboundTarget()

uint64_t CConnman::GetMaxOutboundTarget ( ) const

Definition at line 3331 of file net.cpp.

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◆ GetMaxOutboundTimeframe()

std::chrono::seconds CConnman::GetMaxOutboundTimeframe ( ) const

Definition at line 3336 of file net.cpp.

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◆ GetMaxOutboundTimeLeftInCycle()

std::chrono::seconds CConnman::GetMaxOutboundTimeLeftInCycle ( ) const

returns the time in second left in the current max outbound cycle in case of no limit, it will always return 0

Definition at line 3340 of file net.cpp.

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◆ GetNetworkActive()

bool CConnman::GetNetworkActive ( ) const
inline

Definition at line 1013 of file net.h.

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◆ GetNewNodeId()

NodeId CConnman::GetNewNodeId ( )
private

Definition at line 2858 of file net.cpp.

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◆ GetNodeCount()

size_t CConnman::GetNodeCount ( NumConnections  num) const

Definition at line 3237 of file net.cpp.

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◆ GetNodeStats()

void CConnman::GetNodeStats ( std::vector< CNodeStats > &  vstats) const

Definition at line 3255 of file net.cpp.

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◆ GetOutboundTargetBytesLeft()

uint64_t CConnman::GetOutboundTargetBytesLeft ( ) const

response the bytes left in the current max outbound cycle in case of no limit, it will always response 0

Definition at line 3379 of file net.cpp.

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◆ GetReceiveFloodSize()

unsigned int CConnman::GetReceiveFloodSize ( ) const

Definition at line 3404 of file net.cpp.

◆ GetTotalBytesRecv()

uint64_t CConnman::GetTotalBytesRecv ( ) const

Definition at line 3390 of file net.cpp.

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◆ GetTotalBytesSent()

uint64_t CConnman::GetTotalBytesSent ( ) const

Definition at line 3395 of file net.cpp.

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◆ GetTryNewOutboundPeer()

bool CConnman::GetTryNewOutboundPeer ( ) const

Definition at line 2070 of file net.cpp.

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◆ GetUseAddrmanOutgoing()

bool CConnman::GetUseAddrmanOutgoing ( ) const
inline

Definition at line 1014 of file net.h.

◆ GUARDED_BY() [1/9]

uint64_t nTotalBytesRecv CConnman::GUARDED_BY ( cs_totalBytesRecv  )
inlineprivate

Definition at line 1264 of file net.h.

◆ GUARDED_BY() [2/9]

uint64_t nTotalBytesSent CConnman::GUARDED_BY ( cs_totalBytesSent  )
inlineprivate

Definition at line 1265 of file net.h.

◆ GUARDED_BY() [3/9]

uint64_t nMaxOutboundTotalBytesSentInCycle CConnman::GUARDED_BY ( cs_totalBytesSent  )
inlineprivate

Definition at line 1268 of file net.h.

◆ GUARDED_BY() [4/9]

std::chrono::seconds nMaxOutboundCycleStartTime CConnman::GUARDED_BY ( cs_totalBytesSent  )
inlineprivate

Definition at line 1270 of file net.h.

◆ GUARDED_BY() [5/9]

uint64_t nMaxOutboundLimit CConnman::GUARDED_BY ( cs_totalBytesSent  )
private

◆ GUARDED_BY() [6/9]

std::vector<std::string> vAddedNodes CConnman::GUARDED_BY ( cs_vAddedNodes  )
private

◆ GUARDED_BY() [7/9]

std::vector<CNode *> vNodes CConnman::GUARDED_BY ( cs_vNodes  )
private

◆ GUARDED_BY() [8/9]

std::deque<std::string> m_addr_fetches CConnman::GUARDED_BY ( m_addr_fetches_mutex  )
private

◆ GUARDED_BY() [9/9]

bool fMsgProcWake CConnman::GUARDED_BY ( mutexMsgProc  )
private

flag for waking the message processor.

◆ InactivityCheck()

bool CConnman::InactivityCheck ( const CNode node) const
private

Return true if the peer is inactive and should be disconnected.

Definition at line 1530 of file net.cpp.

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◆ Init()

void CConnman::Init ( const Options connOptions)
inline

Definition at line 961 of file net.h.

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◆ InitBinds()

bool CConnman::InitBinds ( const Options options)
private

Definition at line 2884 of file net.cpp.

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◆ Interrupt()

void CConnman::Interrupt ( )

Definition at line 3044 of file net.cpp.

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◆ NodeFullyConnected()

bool CConnman::NodeFullyConnected ( const CNode pnode)
staticprivate

Definition at line 3487 of file net.cpp.

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◆ NotifyNumConnectionsChanged()

void CConnman::NotifyNumConnectionsChanged ( )
private

Definition at line 1511 of file net.cpp.

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◆ OpenNetworkConnection()

void CConnman::OpenNetworkConnection ( const CAddress addrConnect,
bool  fCountFailure,
CSemaphoreGrant grantOutbound,
const char *  strDest,
ConnectionType  conn_type 
)

Definition at line 2562 of file net.cpp.

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◆ OutboundTargetReached()

bool CConnman::OutboundTargetReached ( bool  historicalBlockServingLimit) const

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.

Definition at line 3356 of file net.cpp.

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◆ PoissonNextSendInbound()

std::chrono::microseconds CConnman::PoissonNextSendInbound ( std::chrono::microseconds  now,
std::chrono::seconds  average_interval 
)

Attempts to obfuscate tx time through exponentially distributed emitting.

Works assuming that a single interval is used. Variable intervals will result in privacy decrease.

Definition at line 3549 of file net.cpp.

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◆ ProcessAddrFetch()

void CConnman::ProcessAddrFetch ( )
private

Definition at line 2052 of file net.cpp.

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◆ PushMessage()

void CConnman::PushMessage ( CNode pnode,
CSerializedNetMsg &&  msg 
)

Definition at line 3491 of file net.cpp.

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◆ RecordBytesRecv()

void CConnman::RecordBytesRecv ( uint64_t  bytes)
private

Definition at line 3311 of file net.cpp.

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◆ RecordBytesSent()

void CConnman::RecordBytesSent ( uint64_t  bytes)
private

Definition at line 3316 of file net.cpp.

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◆ RemoveAddedNode()

bool CConnman::RemoveAddedNode ( const std::string &  node)

Definition at line 3225 of file net.cpp.

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◆ SetNetworkActive()

void CConnman::SetNetworkActive ( bool  active)

Definition at line 2836 of file net.cpp.

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◆ SetTryNewOutboundPeer()

void CConnman::SetTryNewOutboundPeer ( bool  flag)

Definition at line 2074 of file net.cpp.

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◆ ShouldRunInactivityChecks()

bool CConnman::ShouldRunInactivityChecks ( const CNode node,
std::chrono::seconds  now 
) const

Return true if we should disconnect the peer for failing an inactivity check.

Definition at line 1525 of file net.cpp.

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◆ SocketEvents()

void CConnman::SocketEvents ( std::set< SOCKET > &  recv_set,
std::set< SOCKET > &  send_set,
std::set< SOCKET > &  error_set 
)
private

Definition at line 1675 of file net.cpp.

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◆ SocketHandler()

void CConnman::SocketHandler ( )
private

Definition at line 1758 of file net.cpp.

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◆ SocketSendData()

size_t CConnman::SocketSendData ( CNode node) const
private

Definition at line 802 of file net.cpp.

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◆ Start()

bool CConnman::Start ( CScheduler scheduler,
const Options options 
)

Definition at line 2911 of file net.cpp.

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◆ StartExtraBlockRelayPeers()

void CConnman::StartExtraBlockRelayPeers ( )
inline

Definition at line 1071 of file net.h.

◆ Stop()

void CConnman::Stop ( )
inline

Definition at line 1007 of file net.h.

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◆ StopNodes()

void CConnman::StopNodes ( )

Definition at line 3088 of file net.cpp.

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◆ StopThreads()

void CConnman::StopThreads ( )

Definition at line 3067 of file net.cpp.

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◆ ThreadDNSAddressSeed()

void CConnman::ThreadDNSAddressSeed ( )
private

Definition at line 1907 of file net.cpp.

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◆ ThreadI2PAcceptIncoming()

void CConnman::ThreadI2PAcceptIncoming ( )
private

Definition at line 2670 of file net.cpp.

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◆ ThreadMessageHandler()

void CConnman::ThreadMessageHandler ( )
private

Definition at line 2609 of file net.cpp.

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◆ ThreadOpenAddedConnections()

void CConnman::ThreadOpenAddedConnections ( )
private

Definition at line 2530 of file net.cpp.

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◆ ThreadOpenConnections()

void CConnman::ThreadOpenConnections ( std::vector< std::string >  connect,
std::function< void(const CAddress &, ConnectionType)>  mockOpenConnection 
)
private

Definition at line 2116 of file net.cpp.

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◆ ThreadSocketHandler()

void CConnman::ThreadSocketHandler ( )
private

Definition at line 1891 of file net.cpp.

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◆ WakeMessageHandler()

void CConnman::WakeMessageHandler ( )

Definition at line 1899 of file net.cpp.

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Friends And Related Function Documentation

◆ ::CConnmanTest

friend struct ::CConnmanTest
friend

Definition at line 1423 of file net.h.

◆ ConnmanTestMsg

friend struct ConnmanTestMsg
friend

Definition at line 1424 of file net.h.

Member Data Documentation

◆ addrman

AddrMan& CConnman::addrman
private

Definition at line 1286 of file net.h.

◆ clientInterface

CClientUIInterface* CConnman::clientInterface
private

Definition at line 1356 of file net.h.

◆ condMsgProc

std::condition_variable CConnman::condMsgProc
private

Definition at line 1377 of file net.h.

◆ config

const Config* CConnman::config
private

Definition at line 1259 of file net.h.

◆ cs_totalBytesRecv

RecursiveMutex CConnman::cs_totalBytesRecv
mutableprivate

Definition at line 1262 of file net.h.

◆ cs_totalBytesSent

RecursiveMutex CConnman::cs_totalBytesSent
mutableprivate

Definition at line 1263 of file net.h.

◆ cs_vAddedNodes

RecursiveMutex CConnman::cs_vAddedNodes
mutableprivate

Definition at line 1290 of file net.h.

◆ cs_vNodes

RecursiveMutex CConnman::cs_vNodes
mutableprivate

Definition at line 1293 of file net.h.

◆ fAddressesInitialized

bool CConnman::fAddressesInitialized {false}
private

Definition at line 1285 of file net.h.

◆ flagInterruptMsgProc

std::atomic<bool> CConnman::flagInterruptMsgProc {false}
private

Definition at line 1379 of file net.h.

◆ fNetworkActive

std::atomic<bool> CConnman::fNetworkActive {true}
private

Definition at line 1284 of file net.h.

◆ interruptNet

CThreadInterrupt CConnman::interruptNet
private

This is signaled when network activity should cease.

A pointer to it is saved in m_i2p_sam_session, so make sure that the lifetime of interruptNet is not shorter than the lifetime of m_i2p_sam_session.

Definition at line 1387 of file net.h.

◆ m_addr_fetches_mutex

RecursiveMutex CConnman::m_addr_fetches_mutex
private

Definition at line 1288 of file net.h.

◆ m_addr_response_caches

std::map<uint64_t, CachedAddrResponse> CConnman::m_addr_response_caches
private

Addr responses stored in different caches per (network, local socket) prevent cross-network node identification.

If a node for example is multi-homed under Tor and IPv6, a single cache (or no cache at all) would let an attacker to easily detect that it is the same node by comparing responses. Indexing by local socket prevents leakage when a node has multiple listening addresses on the same network.

The used memory equals to 1000 CAddress records (or around 40 bytes) per distinct Network (up to 5) we have/had an inbound peer from, resulting in at most ~196 KB. Every separate local socket may add up to ~196 KB extra.

Definition at line 1322 of file net.h.

◆ m_anchors

std::vector<CAddress> CConnman::m_anchors
private

Addresses that were saved during the previous clean shutdown.

We'll attempt to make block-relay-only connections to them.

Definition at line 1369 of file net.h.

◆ m_banman

BanMan* CConnman::m_banman
private

Pointer to this node's banman.

May be nullptr - check existence before dereferencing.

Definition at line 1363 of file net.h.

◆ m_i2p_sam_session

std::unique_ptr<i2p::sam::Session> CConnman::m_i2p_sam_session
private

I2P SAM session.

Used to accept incoming and make outgoing I2P connections.

Definition at line 1393 of file net.h.

◆ m_max_avalanche_outbound

int CConnman::m_max_avalanche_outbound
private

Definition at line 1350 of file net.h.

◆ m_max_outbound

int CConnman::m_max_outbound
private

Definition at line 1354 of file net.h.

◆ m_max_outbound_block_relay

int CConnman::m_max_outbound_block_relay
private

Definition at line 1347 of file net.h.

◆ m_max_outbound_full_relay

int CConnman::m_max_outbound_full_relay
private

Definition at line 1343 of file net.h.

◆ m_msgproc

std::vector<NetEventsInterface *> CConnman::m_msgproc
private

Definition at line 1358 of file net.h.

◆ m_next_send_inv_to_incoming

std::atomic<std::chrono::microseconds> CConnman::m_next_send_inv_to_incoming {0us}
private

Definition at line 1415 of file net.h.

◆ m_onion_binds

std::vector<CService> CConnman::m_onion_binds
private

A vector of -bind=<address>:<port>=onion arguments each of which is an address and port that are designated for incoming Tor connections.

Definition at line 1421 of file net.h.

◆ m_peer_connect_timeout

std::chrono::seconds CConnman::m_peer_connect_timeout
private

Definition at line 1274 of file net.h.

◆ m_start_extra_block_relay_peers

std::atomic_bool CConnman::m_start_extra_block_relay_peers {false}
private

flag for initiating extra block-relay-only peer connections.

this should only be enabled after initial chain sync has occurred, as these connections are intended to be short-lived and low-bandwidth.

Definition at line 1413 of file net.h.

◆ m_try_another_outbound_peer

std::atomic_bool CConnman::m_try_another_outbound_peer
private

flag for deciding to connect to an extra outbound peer, in excess of m_max_outbound_full_relay.

This takes the place of a feeler connection.

Definition at line 1406 of file net.h.

◆ m_use_addrman_outgoing

bool CConnman::m_use_addrman_outgoing
private

Definition at line 1355 of file net.h.

◆ mutexMsgProc

Mutex CConnman::mutexMsgProc
private

Definition at line 1378 of file net.h.

◆ nLastNodeId

std::atomic<NodeId> CConnman::nLastNodeId {0}
private

Definition at line 1294 of file net.h.

◆ nLocalServices

ServiceFlags CConnman::nLocalServices
private

Services this instance offers.

This data is replicated in each CNode instance we create during peer connection (in ConnectNode()) under a member also called nLocalServices.

This data is not marked const, but after being set it should not change. See the note in CNode::nLocalServices documentation.

See also
CNode::nLocalServices

Definition at line 1336 of file net.h.

◆ nMaxAddnode

int CConnman::nMaxAddnode
private

Definition at line 1352 of file net.h.

◆ nMaxConnections

int CConnman::nMaxConnections
private

Definition at line 1340 of file net.h.

◆ nMaxFeeler

int CConnman::nMaxFeeler
private

Definition at line 1353 of file net.h.

◆ nPrevNodeCount

unsigned int CConnman::nPrevNodeCount {0}
private

Definition at line 1295 of file net.h.

◆ nReceiveFloodSize

unsigned int CConnman::nReceiveFloodSize {0}
private

Definition at line 1281 of file net.h.

◆ nSeed0

const uint64_t CConnman::nSeed0
private

SipHasher seeds for deterministic randomness.

Definition at line 1372 of file net.h.

◆ nSeed1

const uint64_t CConnman::nSeed1
private

Definition at line 1372 of file net.h.

◆ nSendBufferMaxSize

unsigned int CConnman::nSendBufferMaxSize {0}
private

Definition at line 1280 of file net.h.

◆ semAddnode

std::unique_ptr<CSemaphore> CConnman::semAddnode
private

Definition at line 1339 of file net.h.

◆ semOutbound

std::unique_ptr<CSemaphore> CConnman::semOutbound
private

Definition at line 1338 of file net.h.

◆ threadDNSAddressSeed

std::thread CConnman::threadDNSAddressSeed
private

Definition at line 1395 of file net.h.

◆ threadI2PAcceptIncoming

std::thread CConnman::threadI2PAcceptIncoming
private

Definition at line 1400 of file net.h.

◆ threadMessageHandler

std::thread CConnman::threadMessageHandler
private

Definition at line 1399 of file net.h.

◆ threadOpenAddedConnections

std::thread CConnman::threadOpenAddedConnections
private

Definition at line 1397 of file net.h.

◆ threadOpenConnections

std::thread CConnman::threadOpenConnections
private

Definition at line 1398 of file net.h.

◆ threadSocketHandler

std::thread CConnman::threadSocketHandler
private

Definition at line 1396 of file net.h.

◆ vhListenSocket

std::vector<ListenSocket> CConnman::vhListenSocket
private

Definition at line 1283 of file net.h.

◆ vNodesDisconnected

std::list<CNode *> CConnman::vNodesDisconnected
private

Definition at line 1292 of file net.h.

◆ vWhitelistedRange

std::vector<NetWhitelistPermissions> CConnman::vWhitelistedRange
private

Definition at line 1278 of file net.h.


The documentation for this class was generated from the following files: