#include <net.h>
#include <banman.h>
#include <clientversion.h>
#include <consensus/consensus.h>
#include <crypto/sha256.h>
#include <net_permissions.h>
#include <netbase.h>
#include <node/ui_interface.h>
#include <optional.h>
#include <protocol.h>
#include <random.h>
#include <scheduler.h>
#include <util/strencodings.h>
#include <util/translation.h>
#include <fcntl.h>
#include <algorithm>
#include <cstdint>
#include <unordered_map>
#include <math.h>

Include dependency graph for net.cpp:

Classes
class	CNetCleanup

Macros
#define	FEELER_SLEEP_WINDOW 1

#define	MSG_NOSIGNAL 0

#define	MSG_DONTWAIT 0

#define	X(name) stats.name = name

Enumerations
enum	BindFlags { BF_NONE = 0, BF_EXPLICIT = (1U << 0), BF_REPORT_ERROR = (1U << 1), BF_DONT_ADVERTISE = (1U << 2) }
	Used to pass flags to the Bind() function. More...

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

uint16_t	GetListenPort ()

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

static std::vector< CAddress >	convertSeed6 (const std::vector< SeedSpec6 > &vSeedsIn)
	Convert the pnSeed6 array into usable address objects. More...

CAddress	GetLocalAddress (const CNetAddr *paddrPeer, ServiceFlags nLocalServices)

static int	GetnScore (const CService &addr)

bool	IsPeerAddrLocalGood (CNode *pnode)

void	AdvertiseLocal (CNode *pnode)

bool	AddLocal (const CService &addr, int nScore)

bool	AddLocal (const CNetAddr &addr, int nScore)

void	RemoveLocal (const CService &addr)

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

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

static CAddress	GetBindAddress (SOCKET sock)
	Get the bind address for a socket as CAddress. More...

std::string	ConnectionTypeAsString (ConnectionType conn_type)
	Convert ConnectionType enum to a string value. More...

static bool	ReverseCompareNodeMinPingTime (const NodeEvictionCandidate &a, const NodeEvictionCandidate &b)

static bool	ReverseCompareNodeTimeConnected (const NodeEvictionCandidate &a, const NodeEvictionCandidate &b)

static bool	CompareLocalHostTimeConnected (const NodeEvictionCandidate &a, const NodeEvictionCandidate &b)

static bool	CompareNetGroupKeyed (const NodeEvictionCandidate &a, const NodeEvictionCandidate &b)

static bool	CompareNodeBlockTime (const NodeEvictionCandidate &a, const NodeEvictionCandidate &b)

static bool	CompareNodeTXTime (const NodeEvictionCandidate &a, const NodeEvictionCandidate &b)

static bool	CompareNodeBlockRelayOnlyTime (const NodeEvictionCandidate &a, const NodeEvictionCandidate &b)

template<typename T , typename Comparator >
static void	EraseLastKElements (std::vector< T > &elements, Comparator comparator, size_t k)
	Sort an array by the specified comparator, then erase the last K elements. More...

Optional< NodeId >	SelectNodeToEvict (std::vector< NodeEvictionCandidate > &&vEvictionCandidates)

void	Discover ()

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

Variables
static constexpr size_t	MAX_BLOCK_RELAY_ONLY_ANCHORS = 2
	Maximum number of block-relay-only anchor connections. More...

const char *const	ANCHORS_DATABASE_FILENAME = "anchors.dat"
	Anchor IP address database file name. More...

static constexpr std::chrono::minutes	DUMP_PEERS_INTERVAL {15}

static constexpr int	DNSSEEDS_TO_QUERY_AT_ONCE = 3
	Number of DNS seeds to query when the number of connections is low. More...

static constexpr std::chrono::seconds	DNSSEEDS_DELAY_FEW_PEERS {11}
	How long to delay before querying DNS seeds. More...

static constexpr std::chrono::minutes	DNSSEEDS_DELAY_MANY_PEERS {5}

static constexpr int	DNSSEEDS_DELAY_PEER_THRESHOLD = 1000

static constexpr std::chrono::seconds	MAX_UPLOAD_TIMEFRAME {60 * 60 * 24}
	The default timeframe for -maxuploadtarget. More...

static const uint64_t	SELECT_TIMEOUT_MILLISECONDS = 50

const std::string	NET_MESSAGE_COMMAND_OTHER = "other"

static const uint64_t	RANDOMIZER_ID_NETGROUP = 0x6c0edd8036ef4036ULL

static const uint64_t	RANDOMIZER_ID_LOCALHOSTNONCE = 0xd93e69e2bbfa5735ULL

static const uint64_t	RANDOMIZER_ID_ADDRCACHE = 0x1cf2e4ddd306dda9ULL

bool	fDiscover = true

bool	fListen = true

RecursiveMutex	cs_mapLocalHost

std::string	strSubVersion
	Subversion as sent to the P2P network in `version` messages. More...

static CNetCleanup	instance_of_cnetcleanup

Macro Definition Documentation

◆ FEELER_SLEEP_WINDOW

#define FEELER_SLEEP_WINDOW 1

Definition at line 71 of file net.cpp.

◆ MSG_DONTWAIT

#define MSG_DONTWAIT 0

Definition at line 80 of file net.cpp.

◆ MSG_NOSIGNAL

#define MSG_NOSIGNAL 0

Definition at line 75 of file net.cpp.

◆ X

#define X ( name ) stats.name = name

Definition at line 553 of file net.cpp.

Enumeration Type Documentation

◆ BindFlags

enum BindFlags

Used to pass flags to the Bind() function.

Enumerator
BF_NONE
BF_EXPLICIT
BF_REPORT_ERROR
BF_DONT_ADVERTISE	Do not call AddLocal() for our special addresses, e.g., for incoming Tor connections, to prevent gossiping them over the network.

Definition at line 84 of file net.cpp.

Function Documentation

◆ AddLocal() [1/2]

bool AddLocal	(	const CService &	addr,
		int	nScore
	)

Definition at line 230 of file net.cpp.

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◆ AddLocal() [2/2]

bool AddLocal	(	const CNetAddr &	addr,
		int	nScore
	)

Definition at line 256 of file net.cpp.

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◆ AdvertiseLocal()

void AdvertiseLocal ( CNode * pnode )

Definition at line 203 of file net.cpp.

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◆ CompareLocalHostTimeConnected()

static bool CompareLocalHostTimeConnected	(	const NodeEvictionCandidate &	a,
		const NodeEvictionCandidate &	b
	)

static

Definition at line 844 of file net.cpp.

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◆ CompareNetGroupKeyed()

static bool CompareNetGroupKeyed	(	const NodeEvictionCandidate &	a,
		const NodeEvictionCandidate &	b
	)

static

Definition at line 850 of file net.cpp.

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◆ CompareNodeBlockRelayOnlyTime()

static bool CompareNodeBlockRelayOnlyTime	(	const NodeEvictionCandidate &	a,
		const NodeEvictionCandidate &	b
	)

static

Definition at line 872 of file net.cpp.

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◆ CompareNodeBlockTime()

static bool CompareNodeBlockTime	(	const NodeEvictionCandidate &	a,
		const NodeEvictionCandidate &	b
	)

static

Definition at line 854 of file net.cpp.

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◆ CompareNodeTXTime()

static bool CompareNodeTXTime	(	const NodeEvictionCandidate &	a,
		const NodeEvictionCandidate &	b
	)

static

Definition at line 862 of file net.cpp.

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◆ ConnectionTypeAsString()

std::string ConnectionTypeAsString ( ConnectionType conn_type )

Convert ConnectionType enum to a string value.

Definition at line 501 of file net.cpp.

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◆ convertSeed6()

static std::vector<CAddress> convertSeed6 ( const std::vector< SeedSpec6 > & vSeedsIn )

static

Convert the pnSeed6 array into usable address objects.

Definition at line 151 of file net.cpp.

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◆ Discover()

void Discover ( )

Definition at line 2229 of file net.cpp.

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◆ EraseLastKElements()

template<typename T , typename Comparator >

static void EraseLastKElements	(	std::vector< T > &	elements,
		Comparator	comparator,
		size_t	k
	)

static

Sort an array by the specified comparator, then erase the last K elements.

Definition at line 882 of file net.cpp.

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◆ GetBindAddress()

static CAddress GetBindAddress ( SOCKET sock )

static

Get the bind address for a socket as CAddress.

Definition at line 367 of file net.cpp.

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◆ GetListenPort()

uint16_t GetListenPort ( )

Definition at line 120 of file net.cpp.

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◆ GetLocal()

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

Definition at line 126 of file net.cpp.

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◆ GetLocalAddress()

CAddress GetLocalAddress	(	const CNetAddr *	paddrPeer,
		ServiceFlags	nLocalServices
	)

Definition at line 175 of file net.cpp.

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◆ GetnScore()

static int GetnScore ( const CService & addr )

static

Definition at line 187 of file net.cpp.

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◆ GUARDED_BY()

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

◆ IsLocal()

bool IsLocal ( const CService & addr )

check whether a given address is potentially local

Definition at line 301 of file net.cpp.

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◆ IsPeerAddrLocalGood()

bool IsPeerAddrLocalGood ( CNode * pnode )

Definition at line 195 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 276 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 282 of file net.cpp.

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◆ PoissonNextSend()

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 2920 of file net.cpp.

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◆ RemoveLocal()

void RemoveLocal ( const CService & addr )

Definition at line 261 of file net.cpp.

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◆ ReverseCompareNodeMinPingTime()

static bool ReverseCompareNodeMinPingTime	(	const NodeEvictionCandidate &	a,
		const NodeEvictionCandidate &	b
	)

static

Definition at line 834 of file net.cpp.

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◆ ReverseCompareNodeTimeConnected()

static bool ReverseCompareNodeTimeConnected	(	const NodeEvictionCandidate &	a,
		const NodeEvictionCandidate &	b
	)

static

Definition at line 839 of file net.cpp.

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◆ SeenLocal()

bool SeenLocal ( const CService & addr )

vote for a local address

Definition at line 288 of file net.cpp.

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◆ SelectNodeToEvict()

Optional<NodeId> SelectNodeToEvict ( std::vector< NodeEvictionCandidate > && vEvictionCandidates )

Definition at line 889 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 268 of file net.cpp.

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Variable Documentation

◆ ANCHORS_DATABASE_FILENAME

const char* const ANCHORS_DATABASE_FILENAME = "anchors.dat"

Anchor IP address database file name.

Definition at line 46 of file net.cpp.

◆ cs_mapLocalHost

RecursiveMutex cs_mapLocalHost

Definition at line 109 of file net.cpp.

◆ DNSSEEDS_DELAY_FEW_PEERS

constexpr std::chrono::seconds DNSSEEDS_DELAY_FEW_PEERS {11}

static

How long to delay before querying DNS seeds.

If we have more than THRESHOLD entries in addrman, then it's likely that we got those addresses from having previously connected to the P2P network, and that we'll be able to successfully reconnect to the P2P network via contacting one of them. So if that's the case, spend a little longer trying to connect to known peers before querying the DNS seeds.

Definition at line 63 of file net.cpp.

◆ DNSSEEDS_DELAY_MANY_PEERS

constexpr std::chrono::minutes DNSSEEDS_DELAY_MANY_PEERS {5}

static

Definition at line 64 of file net.cpp.

◆ DNSSEEDS_DELAY_PEER_THRESHOLD

constexpr int DNSSEEDS_DELAY_PEER_THRESHOLD = 1000

static

Definition at line 65 of file net.cpp.

◆ DNSSEEDS_TO_QUERY_AT_ONCE

constexpr int DNSSEEDS_TO_QUERY_AT_ONCE = 3

static

Number of DNS seeds to query when the number of connections is low.

Definition at line 52 of file net.cpp.

◆ DUMP_PEERS_INTERVAL

constexpr std::chrono::minutes DUMP_PEERS_INTERVAL {15}

static

Definition at line 49 of file net.cpp.

◆ fDiscover

bool fDiscover = true

Definition at line 107 of file net.cpp.

◆ fListen

bool fListen = true

Definition at line 108 of file net.cpp.

◆ instance_of_cnetcleanup

CNetCleanup instance_of_cnetcleanup

static

Definition at line 2466 of file net.cpp.

◆ MAX_BLOCK_RELAY_ONLY_ANCHORS

constexpr size_t MAX_BLOCK_RELAY_ONLY_ANCHORS = 2

static

Maximum number of block-relay-only anchor connections.

Definition at line 43 of file net.cpp.

◆ MAX_UPLOAD_TIMEFRAME

constexpr std::chrono::seconds MAX_UPLOAD_TIMEFRAME {60 * 60 * 24}

static

The default timeframe for -maxuploadtarget.

1 day.

Definition at line 68 of file net.cpp.

◆ NET_MESSAGE_COMMAND_OTHER

const std::string NET_MESSAGE_COMMAND_OTHER = "*other*"

Definition at line 99 of file net.cpp.

◆ RANDOMIZER_ID_ADDRCACHE

const uint64_t RANDOMIZER_ID_ADDRCACHE = 0x1cf2e4ddd306dda9ULL

static

Definition at line 103 of file net.cpp.

◆ RANDOMIZER_ID_LOCALHOSTNONCE

const uint64_t RANDOMIZER_ID_LOCALHOSTNONCE = 0xd93e69e2bbfa5735ULL

static

Definition at line 102 of file net.cpp.

◆ RANDOMIZER_ID_NETGROUP

const uint64_t RANDOMIZER_ID_NETGROUP = 0x6c0edd8036ef4036ULL

static

Definition at line 101 of file net.cpp.

◆ SELECT_TIMEOUT_MILLISECONDS

const uint64_t SELECT_TIMEOUT_MILLISECONDS = 50

static

Definition at line 97 of file net.cpp.

◆ strSubVersion

std::string strSubVersion

Subversion as sent to the P2P network in version messages.

Definition at line 112 of file net.cpp.

Classes

Macros

Enumerations

Functions

Variables

Macro Definition Documentation

◆ FEELER_SLEEP_WINDOW

◆ MSG_DONTWAIT

◆ MSG_NOSIGNAL

◆ X

Enumeration Type Documentation

◆ BindFlags

Function Documentation

◆ AddLocal() [1/2]

◆ AddLocal() [2/2]

◆ AdvertiseLocal()

◆ CompareLocalHostTimeConnected()

◆ CompareNetGroupKeyed()

◆ CompareNodeBlockRelayOnlyTime()

◆ CompareNodeBlockTime()

◆ CompareNodeTXTime()

◆ ConnectionTypeAsString()

◆ convertSeed6()

◆ Discover()

◆ EraseLastKElements()

◆ GetBindAddress()

◆ GetListenPort()

◆ GetLocal()

◆ GetLocalAddress()

◆ GetnScore()

◆ GUARDED_BY()

◆ IsLocal()

◆ IsPeerAddrLocalGood()

◆ IsReachable() [1/2]

◆ IsReachable() [2/2]

◆ PoissonNextSend()

◆ RemoveLocal()

◆ ReverseCompareNodeMinPingTime()

◆ ReverseCompareNodeTimeConnected()

◆ SeenLocal()

◆ SelectNodeToEvict()

◆ SetReachable()

Variable Documentation

◆ ANCHORS_DATABASE_FILENAME

◆ cs_mapLocalHost

◆ DNSSEEDS_DELAY_FEW_PEERS

◆ DNSSEEDS_DELAY_MANY_PEERS

◆ DNSSEEDS_DELAY_PEER_THRESHOLD

◆ DNSSEEDS_TO_QUERY_AT_ONCE

◆ DUMP_PEERS_INTERVAL

◆ fDiscover

◆ fListen

◆ instance_of_cnetcleanup

◆ MAX_BLOCK_RELAY_ONLY_ANCHORS

◆ MAX_UPLOAD_TIMEFRAME

◆ NET_MESSAGE_COMMAND_OTHER

◆ RANDOMIZER_ID_ADDRCACHE

◆ RANDOMIZER_ID_LOCALHOSTNONCE

◆ RANDOMIZER_ID_NETGROUP

◆ SELECT_TIMEOUT_MILLISECONDS

◆ strSubVersion