#include <bip324.h>
#include <chainparams.h>
#include <common/bloom.h>
#include <compat/compat.h>
#include <consensus/amount.h>
#include <crypto/siphash.h>
#include <hash.h>
#include <i2p.h>
#include <kernel/messagestartchars.h>
#include <net_permissions.h>
#include <netaddress.h>
#include <netbase.h>
#include <netgroup.h>
#include <node/connection_types.h>
#include <node/protocol_version.h>
#include <policy/feerate.h>
#include <protocol.h>
#include <random.h>
#include <semaphore_grant.h>
#include <span.h>
#include <streams.h>
#include <sync.h>
#include <uint256.h>
#include <util/check.h>
#include <util/sock.h>
#include <util/threadinterrupt.h>
#include <atomic>
#include <condition_variable>
#include <cstdint>
#include <deque>
#include <functional>
#include <list>
#include <map>
#include <memory>
#include <optional>
#include <queue>
#include <thread>
#include <unordered_set>
#include <vector>

Include dependency graph for net.h:

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Classes
struct	AddedNodeParams

struct	AddedNodeInfo

struct	CSerializedNetMsg

struct	LocalServiceInfo

class	CNodeStats

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

class	Transport
	The Transport converts one connection's sent messages to wire bytes, and received bytes back. More...

struct	Transport::Info

class	V1Transport

class	V2Transport

struct	CNodeOptions

class	CNode
	Information about a peer. More...

class	NetEventsInterface
	Interface for message handling. More...

class	CConnman

struct	CConnman::Options

struct	CConnman::ListenSocket

struct	CConnman::CachedAddrResponse
	Cache responses to addr requests to minimize privacy leak. More...

struct	CConnman::ReconnectionInfo
	Struct for entries in m_reconnections. More...

class	CConnman::NodesSnapshot
	RAII helper to atomically create a copy of `m_nodes` and add a reference to each of the nodes. More...

Typedefs
typedef int64_t	NodeId

using	mapMsgTypeSize = std::map< std::string, uint64_t >

Enumerations
enum	{ LOCAL_NONE , LOCAL_IF , LOCAL_BIND , LOCAL_MAPPED , LOCAL_MANUAL , LOCAL_MAX }

Functions
void	Discover ()
	Look up IP addresses from all interfaces on the machine and add them to the list of local addresses to self-advertise. More...

uint16_t	GetListenPort ()

std::optional< CService >	GetLocalAddrForPeer (CNode &node)
	Returns a local address that we should advertise to this peer. More...

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...

CService	GetLocalAddress (const CNode &peer)

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

Variables
static constexpr std::chrono::minutes	TIMEOUT_INTERVAL {20}
	Time after which to disconnect, after waiting for a ping response (or inactivity). More...

static constexpr auto	FEELER_INTERVAL = 2min
	Run the feeler connection loop once every 2 minutes. More...

static constexpr auto	EXTRA_BLOCK_RELAY_ONLY_PEER_INTERVAL = 5min
	Run the extra block-relay-only connection loop once every 5 minutes. More...

static const unsigned int	MAX_PROTOCOL_MESSAGE_LENGTH = 4 * 1000 * 1000
	Maximum length of incoming protocol messages (no message over 4 MB is currently acceptable). 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_BLOCK_RELAY_ONLY_CONNECTIONS = 2
	Maximum number of block-relay-only outgoing connections. More...

static const int	MAX_FEELER_CONNECTIONS = 1
	Maximum number of feeler connections. More...

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

static const unsigned int	DEFAULT_MAX_PEER_CONNECTIONS = 125
	The maximum number of peer connections to maintain. More...

static const std::string	DEFAULT_MAX_UPLOAD_TARGET {"0M"}
	The default 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 int	NUM_FDS_MESSAGE_CAPTURE = 1
	Number of file descriptors required for message capture. More...

static constexpr std::chrono::hours	ASMAP_HEALTH_CHECK_INTERVAL {24}
	Interval for ASMap Health Check. More...

static constexpr bool	DEFAULT_FORCEDNSSEED {false}

static constexpr bool	DEFAULT_DNSSEED {true}

static constexpr bool	DEFAULT_FIXEDSEEDS {true}

static const size_t	DEFAULT_MAXRECEIVEBUFFER = 5 * 1000

static const size_t	DEFAULT_MAXSENDBUFFER = 1 * 1000

static constexpr bool	DEFAULT_V2_TRANSPORT {true}

bool	fDiscover

bool	fListen

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

GlobalMutex	g_maplocalhost_mutex

const std::string	NET_MESSAGE_TYPE_OTHER

std::function< void(const CAddress &addr, const std::string &msg_type, std::span< const unsigned char > data, bool is_incoming)>	CaptureMessage
	Defaults to `CaptureMessageToFile()`, but can be overridden by unit tests. More...

Typedef Documentation

◆ mapMsgTypeSize

using mapMsgTypeSize = std::map< std::string, uint64_t>

Definition at line 183 of file net.h.

◆ NodeId

typedef int64_t NodeId

Definition at line 98 of file net.h.

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

Enumerator
LOCAL_NONE
LOCAL_IF
LOCAL_BIND
LOCAL_MAPPED
LOCAL_MANUAL
LOCAL_MAX

Definition at line 147 of file net.h.

Function Documentation

◆ AddLocal() [1/2]

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

Definition at line 298 of file net.cpp.

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◆ AddLocal() [2/2]

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

Definition at line 270 of file net.cpp.

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◆ Discover()

void Discover ( )

Look up IP addresses from all interfaces on the machine and add them to the list of local addresses to self-advertise.

The loopback interface is skipped.

Definition at line 3179 of file net.cpp.

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◆ GetListenPort()

uint16_t GetListenPort ( )

Definition at line 137 of file net.cpp.

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◆ GetLocalAddress()

CService GetLocalAddress ( const CNode & peer )

Definition at line 219 of file net.cpp.

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◆ GetLocalAddrForPeer()

std::optional< CService > GetLocalAddrForPeer ( CNode & node )

Returns a local address that we should advertise to this peer.

Definition at line 239 of file net.cpp.

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◆ GUARDED_BY()

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

◆ IsLocal()

bool IsLocal ( const CService & addr )

check whether a given address is potentially local

Definition at line 322 of file net.cpp.

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◆ RemoveLocal()

void RemoveLocal ( const CService & addr )

Definition at line 303 of file net.cpp.

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◆ SeenLocal()

bool SeenLocal ( const CService & addr )

vote for a local address

Definition at line 311 of file net.cpp.

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Variable Documentation

◆ ASMAP_HEALTH_CHECK_INTERVAL

constexpr std::chrono::hours ASMAP_HEALTH_CHECK_INTERVAL {24}

staticconstexpr

Interval for ASMap Health Check.

Definition at line 88 of file net.h.

◆ CaptureMessage

std::function<void(const CAddress& addr, const std::string& msg_type, std::span<const unsigned char> data, bool is_incoming)> CaptureMessage

extern

Defaults to CaptureMessageToFile(), but can be overridden by unit tests.

Definition at line 4014 of file net.cpp.

◆ DEFAULT_BLOCKSONLY

const bool DEFAULT_BLOCKSONLY = false

static

Default for blocks only.

Definition at line 82 of file net.h.

◆ DEFAULT_DNSSEED

constexpr bool DEFAULT_DNSSEED {true}

staticconstexpr

Definition at line 91 of file net.h.

◆ DEFAULT_FIXEDSEEDS

constexpr bool DEFAULT_FIXEDSEEDS {true}

staticconstexpr

Definition at line 92 of file net.h.

◆ DEFAULT_FORCEDNSSEED

constexpr bool DEFAULT_FORCEDNSSEED {false}

staticconstexpr

Definition at line 90 of file net.h.

◆ DEFAULT_LISTEN

const bool DEFAULT_LISTEN = true

static

-listen default

Definition at line 76 of file net.h.

◆ DEFAULT_MAX_PEER_CONNECTIONS

const unsigned int DEFAULT_MAX_PEER_CONNECTIONS = 125

static

The maximum number of peer connections to maintain.

Definition at line 78 of file net.h.

◆ DEFAULT_MAX_UPLOAD_TARGET

const std::string DEFAULT_MAX_UPLOAD_TARGET {"0M"}

static

The default for -maxuploadtarget.

0 = Unlimited

Definition at line 80 of file net.h.

◆ DEFAULT_MAXRECEIVEBUFFER

const size_t DEFAULT_MAXRECEIVEBUFFER = 5 * 1000

static

Definition at line 93 of file net.h.

◆ DEFAULT_MAXSENDBUFFER

const size_t DEFAULT_MAXSENDBUFFER = 1 * 1000

static

Definition at line 94 of file net.h.

◆ DEFAULT_PEER_CONNECT_TIMEOUT

const int64_t DEFAULT_PEER_CONNECT_TIMEOUT = 60

static

-peertimeout default

Definition at line 84 of file net.h.

◆ DEFAULT_V2_TRANSPORT

constexpr bool DEFAULT_V2_TRANSPORT {true}

staticconstexpr

Definition at line 96 of file net.h.

◆ EXTRA_BLOCK_RELAY_ONLY_PEER_INTERVAL

constexpr auto EXTRA_BLOCK_RELAY_ONLY_PEER_INTERVAL = 5min

staticconstexpr

Run the extra block-relay-only connection loop once every 5 minutes.

Definition at line 62 of file net.h.

◆ fDiscover

bool fDiscover

extern

Definition at line 115 of file net.cpp.

◆ FEELER_INTERVAL

constexpr auto FEELER_INTERVAL = 2min

staticconstexpr

Run the feeler connection loop once every 2 minutes.

Definition at line 60 of file net.h.

◆ fListen

bool fListen

extern

Definition at line 116 of file net.cpp.

◆ g_maplocalhost_mutex

GlobalMutex g_maplocalhost_mutex

extern

Definition at line 117 of file net.cpp.

◆ MAX_ADDNODE_CONNECTIONS

const int MAX_ADDNODE_CONNECTIONS = 8

static

Maximum number of addnode outgoing nodes.

Definition at line 70 of file net.h.

◆ MAX_BLOCK_RELAY_ONLY_CONNECTIONS

const int MAX_BLOCK_RELAY_ONLY_CONNECTIONS = 2

static

Maximum number of block-relay-only outgoing connections.

Definition at line 72 of file net.h.

◆ MAX_FEELER_CONNECTIONS

const int MAX_FEELER_CONNECTIONS = 1

static

Maximum number of feeler connections.

Definition at line 74 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 68 of file net.h.

◆ MAX_PROTOCOL_MESSAGE_LENGTH

const unsigned int MAX_PROTOCOL_MESSAGE_LENGTH = 4 * 1000 * 1000

static

Maximum length of incoming protocol messages (no message over 4 MB is currently acceptable).

Definition at line 64 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 66 of file net.h.

◆ NET_MESSAGE_TYPE_OTHER

const std::string NET_MESSAGE_TYPE_OTHER

extern

Definition at line 107 of file net.cpp.

◆ NUM_FDS_MESSAGE_CAPTURE

const int NUM_FDS_MESSAGE_CAPTURE = 1

static

Number of file descriptors required for message capture.

Definition at line 86 of file net.h.

◆ strSubVersion

std::string strSubVersion

extern

Subversion as sent to the P2P network in version messages.

Definition at line 119 of file net.cpp.

◆ TIMEOUT_INTERVAL

constexpr std::chrono::minutes TIMEOUT_INTERVAL {20}

staticconstexpr

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

Definition at line 58 of file net.h.

Classes

Typedefs

Enumerations

Functions

Variables

Typedef Documentation

◆ mapMsgTypeSize

◆ NodeId

Enumeration Type Documentation

◆ anonymous enum

Function Documentation

◆ AddLocal() [1/2]

◆ AddLocal() [2/2]

◆ Discover()

◆ GetListenPort()

◆ GetLocalAddress()

◆ GetLocalAddrForPeer()

◆ GUARDED_BY()

◆ IsLocal()

◆ RemoveLocal()

◆ SeenLocal()

Variable Documentation

◆ ASMAP_HEALTH_CHECK_INTERVAL

◆ CaptureMessage

◆ DEFAULT_BLOCKSONLY

◆ DEFAULT_DNSSEED

◆ DEFAULT_FIXEDSEEDS

◆ DEFAULT_FORCEDNSSEED

◆ DEFAULT_LISTEN

◆ DEFAULT_MAX_PEER_CONNECTIONS

◆ DEFAULT_MAX_UPLOAD_TARGET

◆ DEFAULT_MAXRECEIVEBUFFER

◆ DEFAULT_MAXSENDBUFFER

◆ DEFAULT_PEER_CONNECT_TIMEOUT

◆ DEFAULT_V2_TRANSPORT

◆ EXTRA_BLOCK_RELAY_ONLY_PEER_INTERVAL

◆ fDiscover

◆ FEELER_INTERVAL

◆ fListen

◆ g_maplocalhost_mutex

◆ MAX_ADDNODE_CONNECTIONS

◆ MAX_BLOCK_RELAY_ONLY_CONNECTIONS

◆ MAX_FEELER_CONNECTIONS

◆ MAX_OUTBOUND_FULL_RELAY_CONNECTIONS

◆ MAX_PROTOCOL_MESSAGE_LENGTH

◆ MAX_SUBVERSION_LENGTH

◆ NET_MESSAGE_TYPE_OTHER

◆ NUM_FDS_MESSAGE_CAPTURE

◆ strSubVersion

◆ TIMEOUT_INTERVAL