#include <addrdb.h>
#include <addrman.h>
#include <amount.h>
#include <avalanche/delegation.h>
#include <bloom.h>
#include <chainparams.h>
#include <compat.h>
#include <crypto/siphash.h>
#include <hash.h>
#include <limitedmap.h>
#include <net_permissions.h>
#include <netaddress.h>
#include <protocol.h>
#include <random.h>
#include <streams.h>
#include <sync.h>
#include <threadinterrupt.h>
#include <uint256.h>
#include <validation.h>
#include <atomic>
#include <condition_variable>
#include <cstdint>
#include <deque>
#include <memory>
#include <thread>
#include <arpa/inet.h>

Include dependency graph for net.h:

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Classes
struct	AddedNodeInfo

struct	CSerializedNetMsg

class	CConnman

struct	CConnman::Options

struct	CConnman::ListenSocket

class	NetEventsInterface
	Interface for message handling. More...

struct	LocalServiceInfo

struct	CNodeStats
	POD that contains various stats about a node. More...

class	CNetMessage
	Transport protocol agnostic message container. More...

class	TransportDeserializer
	The TransportDeserializer takes care of holding and deserializing the network receive buffer. More...

class	V1TransportDeserializer

class	TransportSerializer
	The TransportSerializer prepares messages for the network transport. More...

class	V1TransportSerializer

class	CNode
	Information about a peer. More...

struct	CNode::TxRelay

struct	CNode::AvalancheState

Typedefs
typedef int64_t	NodeId

typedef std::map< std::string, uint64_t >	mapMsgCmdSize

Enumerations
enum	ConnectionType { ConnectionType::INBOUND, ConnectionType::OUTBOUND, ConnectionType::MANUAL, ConnectionType::FEELER, ConnectionType::BLOCK_RELAY, ConnectionType::ADDR_FETCH }
	Different types of connections to a peer. More...

enum	{ LOCAL_NONE, LOCAL_IF, LOCAL_BIND, LOCAL_UPNP, LOCAL_MANUAL, LOCAL_MAX }

Functions
void	Discover ()

void	StartMapPort ()

void	InterruptMapPort ()

void	StopMapPort ()

unsigned short	GetListenPort ()

bool	IsPeerAddrLocalGood (CNode *pnode)

void	AdvertiseLocal (CNode *pnode)

void	SetReachable (enum Network net, bool reachable)
	Mark a network as reachable or unreachable (no automatic connects to it) More...

bool	IsReachable (enum Network net)

bool	IsReachable (const CNetAddr &addr)

bool	AddLocal (const CService &addr, int nScore=LOCAL_NONE)

bool	AddLocal (const CNetAddr &addr, int nScore=LOCAL_NONE)

void	RemoveLocal (const CService &addr)

bool	SeenLocal (const CService &addr)
	vote for a local address More...

bool	IsLocal (const CService &addr)
	check whether a given address is potentially local More...

bool	GetLocal (CService &addr, const CNetAddr *paddrPeer=nullptr)

CAddress	GetLocalAddress (const CNetAddr *paddrPeer, ServiceFlags nLocalServices)

std::map< CNetAddr, LocalServiceInfo > mapLocalHost	GUARDED_BY (cs_mapLocalHost)

int64_t	PoissonNextSend (int64_t now, int average_interval_seconds)
	Return a timestamp in the future (in microseconds) for exponentially distributed events. More...

std::chrono::microseconds	PoissonNextSend (std::chrono::microseconds now, std::chrono::seconds average_interval)
	Wrapper to return mockable type. More...

std::string	getSubVersionEB (uint64_t MaxBlockSize)
	This function convert MaxBlockSize from byte to MB with a decimal precision one digit rounded down E.g. More...

std::string	userAgent (const Config &config)

Variables
static const bool	DEFAULT_WHITELISTRELAY = true
	Default for -whitelistrelay. More...

static const bool	DEFAULT_WHITELISTFORCERELAY = false
	Default for -whitelistforcerelay. More...

static const int	TIMEOUT_INTERVAL = 20 * 60
	Time after which to disconnect, after waiting for a ping response (or inactivity). More...

static const int	FEELER_INTERVAL = 120
	Run the feeler connection loop once every 2 minutes or 120 seconds. More...

static const unsigned int	MAX_ADDR_TO_SEND = 1000
	The maximum number of new addresses to accumulate before announcing. More...

static const unsigned int	MAX_SUBVERSION_LENGTH = 256
	Maximum length of the user agent string in `version` message. More...

static const int	MAX_OUTBOUND_FULL_RELAY_CONNECTIONS = 8
	Maximum number of automatic outgoing nodes over which we'll relay everything (blocks, tx, addrs, etc) More...

static const int	MAX_ADDNODE_CONNECTIONS = 8
	Maximum number of addnode outgoing nodes. More...

static const int	MAX_BLOCKS_ONLY_CONNECTIONS = 2
	Maximum number of block-relay-only outgoing connections. More...

static const bool	DEFAULT_LISTEN = true
	-listen default More...

static const bool	DEFAULT_UPNP = false
	-upnp default More...

static const unsigned int	DEFAULT_MAX_PEER_CONNECTIONS = 4096
	The maximum number of peer connections to maintain. More...

static const uint64_t	DEFAULT_MAX_UPLOAD_TARGET = 0
	The default for -maxuploadtarget. More...

static const uint64_t	MAX_UPLOAD_TIMEFRAME = 60 * 60 * 24
	The default timeframe for -maxuploadtarget. More...

static const bool	DEFAULT_BLOCKSONLY = false
	Default for blocks only. More...

static const int64_t	DEFAULT_PEER_CONNECT_TIMEOUT = 60
	-peertimeout default More...

static const bool	DEFAULT_FORCEDNSSEED = false

static const size_t	DEFAULT_MAXRECEIVEBUFFER = 5 * 1000

static const size_t	DEFAULT_MAXSENDBUFFER = 1 * 1000

static constexpr NodeId	NO_NODE = -1
	Special NodeId that represent no node. More...

bool	fDiscover

bool	fListen

bool	g_relay_txes

RecursiveMutex	cs_mapLocalHost

const std::string	NET_MESSAGE_COMMAND_OTHER

Typedef Documentation

◆ mapMsgCmdSize

typedef std::map<std::string, uint64_t> mapMsgCmdSize

Definition at line 638 of file net.h.

◆ NodeId

typedef int64_t NodeId

Definition at line 99 of file net.h.

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

Enumerator
LOCAL_NONE
LOCAL_IF
LOCAL_BIND
LOCAL_UPNP
LOCAL_MANUAL
LOCAL_MAX

Definition at line 586 of file net.h.

◆ ConnectionType

enum ConnectionType

strong

Different types of connections to a peer.

This enum encapsulates the information we have available at the time of opening or accepting the connection. Aside from INBOUND, all types are initiated by us.

Enumerator
INBOUND	Peer initiated connections.
OUTBOUND	Full relay connections (blocks, addrs, txns) made automatically. Addresses selected from AddrMan.
MANUAL	Connections to addresses added via addnode or the connect command line argument.
FEELER	Short lived connections used to test address validity.
BLOCK_RELAY	Only relay blocks to these automatic outbound connections. Addresses selected from AddrMan.
ADDR_FETCH	Short lived connections used to solicit addrs when starting the node without a populated AddrMan.

Definition at line 133 of file net.h.

Function Documentation

◆ AddLocal() [1/2]

bool AddLocal	(	const CService &	addr,
		int	nScore = `LOCAL_NONE`
	)

Definition at line 229 of file net.cpp.

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◆ AddLocal() [2/2]

bool AddLocal	(	const CNetAddr &	addr,
		int	nScore = `LOCAL_NONE`
	)

Definition at line 257 of file net.cpp.

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◆ AdvertiseLocal()

void AdvertiseLocal ( CNode * pnode )

Definition at line 200 of file net.cpp.

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◆ Discover()

void Discover ( )

Definition at line 2437 of file net.cpp.

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◆ GetListenPort()

unsigned short GetListenPort ( )

Definition at line 121 of file net.cpp.

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◆ GetLocal()

bool GetLocal	(	CService &	addr,
		const CNetAddr *	paddrPeer = `nullptr`
	)

Definition at line 126 of file net.cpp.

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◆ GetLocalAddress()

CAddress GetLocalAddress	(	const CNetAddr *	paddrPeer,
		ServiceFlags	nLocalServices
	)

Definition at line 173 of file net.cpp.

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◆ getSubVersionEB()

std::string getSubVersionEB ( uint64_t MaxBlockSize )

This function convert MaxBlockSize from byte to MB with a decimal precision one digit rounded down E.g.

1660000 -> 1.6 2010000 -> 2.0 1000000 -> 1.0 230000 -> 0.2 50000 -> 0.0

NB behavior for EB<1MB not standardized yet still the function applies the same algo used for EB greater or equal to 1MB

Definition at line 3150 of file net.cpp.

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◆ GUARDED_BY()

std::map<CNetAddr, LocalServiceInfo> mapLocalHost GUARDED_BY ( cs_mapLocalHost )

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◆ InterruptMapPort()

void InterruptMapPort ( )

Definition at line 1735 of file net.cpp.

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◆ IsLocal()

bool IsLocal ( const CService & addr )

check whether a given address is potentially local

Definition at line 295 of file net.cpp.

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◆ IsPeerAddrLocalGood()

bool IsPeerAddrLocalGood ( CNode * pnode )

Definition at line 193 of file net.cpp.

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◆ IsReachable() [1/2]

bool IsReachable ( enum Network net )

Returns: true if the network is reachable, false otherwise

Definition at line 275 of file net.cpp.

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◆ IsReachable() [2/2]

bool IsReachable ( const CNetAddr & addr )

Returns: true if the address is in a reachable network, false otherwise

Definition at line 280 of file net.cpp.

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◆ PoissonNextSend() [1/2]

int64_t PoissonNextSend	(	int64_t	now,
		int	average_interval_seconds
	)

Return a timestamp in the future (in microseconds) for exponentially distributed events.

Definition at line 3117 of file net.cpp.

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◆ PoissonNextSend() [2/2]

std::chrono::microseconds PoissonNextSend	(	std::chrono::microseconds	now,
		std::chrono::seconds	average_interval
	)

inline

Wrapper to return mockable type.

Definition at line 1161 of file net.h.

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◆ RemoveLocal()

void RemoveLocal ( const CService & addr )

Definition at line 261 of file net.cpp.

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◆ SeenLocal()

bool SeenLocal ( const CService & addr )

vote for a local address

Definition at line 285 of file net.cpp.

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◆ SetReachable()

void SetReachable	(	enum Network	net,
		bool	reachable
	)

Mark a network as reachable or unreachable (no automatic connects to it)

Note: Networks are reachable by default

Definition at line 267 of file net.cpp.

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◆ StartMapPort()

void StartMapPort ( )

Definition at line 1732 of file net.cpp.

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◆ StopMapPort()

void StopMapPort ( )

Definition at line 1738 of file net.cpp.

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◆ userAgent()

std::string userAgent ( const Config & config )

Definition at line 3164 of file net.cpp.

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Variable Documentation

◆ cs_mapLocalHost

RecursiveMutex cs_mapLocalHost

Definition at line 112 of file net.cpp.

◆ DEFAULT_BLOCKSONLY

const bool DEFAULT_BLOCKSONLY = false

static

Default for blocks only.

Definition at line 91 of file net.h.

◆ DEFAULT_FORCEDNSSEED

const bool DEFAULT_FORCEDNSSEED = false

static

Definition at line 95 of file net.h.

◆ DEFAULT_LISTEN

const bool DEFAULT_LISTEN = true

static

-listen default

Definition at line 73 of file net.h.

◆ DEFAULT_MAX_PEER_CONNECTIONS

const unsigned int DEFAULT_MAX_PEER_CONNECTIONS = 4096

static

The maximum number of peer connections to maintain.

This quantity might not be reachable on some systems, especially on platforms that do not provide a working poll() interface.

Definition at line 85 of file net.h.

◆ DEFAULT_MAX_UPLOAD_TARGET

const uint64_t DEFAULT_MAX_UPLOAD_TARGET = 0

static

The default for -maxuploadtarget.

0 = Unlimited

Definition at line 87 of file net.h.

◆ DEFAULT_MAXRECEIVEBUFFER

const size_t DEFAULT_MAXRECEIVEBUFFER = 5 * 1000

static

Definition at line 96 of file net.h.

◆ DEFAULT_MAXSENDBUFFER

const size_t DEFAULT_MAXSENDBUFFER = 1 * 1000

static

Definition at line 97 of file net.h.

◆ DEFAULT_PEER_CONNECT_TIMEOUT

const int64_t DEFAULT_PEER_CONNECT_TIMEOUT = 60

static

-peertimeout default

Definition at line 93 of file net.h.

◆ DEFAULT_UPNP

const bool DEFAULT_UPNP = false

static

-upnp default

Definition at line 78 of file net.h.

◆ DEFAULT_WHITELISTFORCERELAY

const bool DEFAULT_WHITELISTFORCERELAY = false

static

Default for -whitelistforcerelay.

Definition at line 50 of file net.h.

◆ DEFAULT_WHITELISTRELAY

const bool DEFAULT_WHITELISTRELAY = true

static

Default for -whitelistrelay.

Definition at line 48 of file net.h.

◆ fDiscover

bool fDiscover

Definition at line 109 of file net.cpp.

◆ FEELER_INTERVAL

const int FEELER_INTERVAL = 120

static

Run the feeler connection loop once every 2 minutes or 120 seconds.

Definition at line 58 of file net.h.

◆ fListen

bool fListen

Definition at line 110 of file net.cpp.

◆ g_relay_txes

bool g_relay_txes

Definition at line 111 of file net.cpp.

◆ MAX_ADDNODE_CONNECTIONS

const int MAX_ADDNODE_CONNECTIONS = 8

static

Maximum number of addnode outgoing nodes.

Definition at line 69 of file net.h.

◆ MAX_ADDR_TO_SEND

const unsigned int MAX_ADDR_TO_SEND = 1000

static

The maximum number of new addresses to accumulate before announcing.

Definition at line 60 of file net.h.

◆ MAX_BLOCKS_ONLY_CONNECTIONS

const int MAX_BLOCKS_ONLY_CONNECTIONS = 2

static

Maximum number of block-relay-only outgoing connections.

Definition at line 71 of file net.h.

◆ MAX_OUTBOUND_FULL_RELAY_CONNECTIONS

const int MAX_OUTBOUND_FULL_RELAY_CONNECTIONS = 8

static

Maximum number of automatic outgoing nodes over which we'll relay everything (blocks, tx, addrs, etc)

Definition at line 67 of file net.h.

◆ MAX_SUBVERSION_LENGTH

const unsigned int MAX_SUBVERSION_LENGTH = 256

static

Maximum length of the user agent string in version message.

Definition at line 62 of file net.h.

◆ MAX_UPLOAD_TIMEFRAME

const uint64_t MAX_UPLOAD_TIMEFRAME = 60 * 60 * 24

static

The default timeframe for -maxuploadtarget.

1 day.

Definition at line 89 of file net.h.

◆ NET_MESSAGE_COMMAND_OTHER

const std::string NET_MESSAGE_COMMAND_OTHER

Definition at line 98 of file net.cpp.

◆ NO_NODE

constexpr NodeId NO_NODE = -1

static

Special NodeId that represent no node.

Definition at line 104 of file net.h.

◆ TIMEOUT_INTERVAL

const int TIMEOUT_INTERVAL = 20 * 60

static

Time after which to disconnect, after waiting for a ping response (or inactivity).

Definition at line 56 of file net.h.

Classes

Typedefs

Enumerations

Functions

Variables

Typedef Documentation

◆ mapMsgCmdSize

◆ NodeId

Enumeration Type Documentation

◆ anonymous enum

◆ ConnectionType

Function Documentation

◆ AddLocal() [1/2]

◆ AddLocal() [2/2]

◆ AdvertiseLocal()

◆ Discover()

◆ GetListenPort()

◆ GetLocal()

◆ GetLocalAddress()

◆ getSubVersionEB()

◆ GUARDED_BY()

◆ InterruptMapPort()

◆ IsLocal()

◆ IsPeerAddrLocalGood()

◆ IsReachable() [1/2]

◆ IsReachable() [2/2]

◆ PoissonNextSend() [1/2]

◆ PoissonNextSend() [2/2]

◆ RemoveLocal()

◆ SeenLocal()

◆ SetReachable()

◆ StartMapPort()

◆ StopMapPort()

◆ userAgent()

Variable Documentation

◆ cs_mapLocalHost

◆ DEFAULT_BLOCKSONLY

◆ DEFAULT_FORCEDNSSEED

◆ DEFAULT_LISTEN

◆ DEFAULT_MAX_PEER_CONNECTIONS

◆ DEFAULT_MAX_UPLOAD_TARGET

◆ DEFAULT_MAXRECEIVEBUFFER

◆ DEFAULT_MAXSENDBUFFER

◆ DEFAULT_PEER_CONNECT_TIMEOUT

◆ DEFAULT_UPNP

◆ DEFAULT_WHITELISTFORCERELAY

◆ DEFAULT_WHITELISTRELAY

◆ fDiscover

◆ FEELER_INTERVAL

◆ fListen

◆ g_relay_txes

◆ MAX_ADDNODE_CONNECTIONS

◆ MAX_ADDR_TO_SEND

◆ MAX_BLOCKS_ONLY_CONNECTIONS

◆ MAX_OUTBOUND_FULL_RELAY_CONNECTIONS

◆ MAX_SUBVERSION_LENGTH

◆ MAX_UPLOAD_TIMEFRAME

◆ NET_MESSAGE_COMMAND_OTHER

◆ NO_NODE

◆ TIMEOUT_INTERVAL