Stochastical (IP) address manager. More...

#include <addrman.h>

Collaboration diagram for CAddrMan:

Public Member Functions
template<typename Stream >
void	Serialize (Stream &s, int nType, int nVersionDummy) const
	serialized format: More...

template<typename Stream >
void	Unserialize (Stream &s, int nType, int nVersionDummy)

unsigned int	GetSerializeSize (int nType, int nVersion) const

void	Clear ()

	CAddrMan ()

	~CAddrMan ()

int	size ()
	Return the number of (unique) addresses in all tables. More...

void	Check ()
	Consistency check. More...

bool	Add (const CAddress &addr, const CNetAddr &source, int64_t nTimePenalty=0)
	Add a single address. More...

bool	Add (const std::vector< CAddress > &vAddr, const CNetAddr &source, int64_t nTimePenalty=0)
	Add multiple addresses. More...

void	Good (const CService &addr, int64_t nTime=GetAdjustedTime())
	Mark an entry as accessible. More...

void	Attempt (const CService &addr, bool fCountFailure, int64_t nTime=GetAdjustedTime())
	Mark an entry as connection attempted to. More...

CAddrInfo	Select (bool newOnly=false)
	Choose an address to connect to. More...

std::vector< CAddress >	GetAddr ()
	Return a bunch of addresses, selected at random. More...

void	Connected (const CService &addr, int64_t nTime=GetAdjustedTime())
	Mark an entry as currently-connected-to. More...

void	SetServices (const CService &addr, ServiceFlags nServices)

Protected Member Functions
CAddrInfo *	Find (const CNetAddr &addr, int *pnId=NULL)
	Find an entry. More...

CAddrInfo *	Create (const CAddress &addr, const CNetAddr &addrSource, int *pnId=NULL)
	find an entry, creating it if necessary. More...

void	SwapRandom (unsigned int nRandomPos1, unsigned int nRandomPos2)
	Swap two elements in vRandom. More...

void	MakeTried (CAddrInfo &info, int nId)
	Move an entry from the "new" table(s) to the "tried" table. More...

void	Delete (int nId)
	Delete an entry. It must not be in tried, and have refcount 0. More...

void	ClearNew (int nUBucket, int nUBucketPos)
	Clear a position in a "new" table. This is the only place where entries are actually deleted. More...

void	Good_ (const CService &addr, int64_t nTime)
	Mark an entry "good", possibly moving it from "new" to "tried". More...

bool	Add_ (const CAddress &addr, const CNetAddr &source, int64_t nTimePenalty)
	Add an entry to the "new" table. More...

void	Attempt_ (const CService &addr, bool fCountFailure, int64_t nTime)
	Mark an entry as attempted to connect. More...

CAddrInfo	Select_ (bool newOnly)
	Select an address to connect to, if newOnly is set to true, only the new table is selected from. More...

virtual int	RandomInt (int nMax)
	Wraps GetRandInt to allow tests to override RandomInt and make it determinismistic. More...

void	GetAddr_ (std::vector< CAddress > &vAddr)
	Select several addresses at once. More...

void	Connected_ (const CService &addr, int64_t nTime)
	Mark an entry as currently-connected-to. More...

void	SetServices_ (const CService &addr, ServiceFlags nServices)
	Update an entry's service bits. More...

Protected Attributes
uint256	nKey
	secret key to randomize bucket select with More...

FastRandomContext	insecure_rand
	Source of random numbers for randomization in inner loops. More...

Private Attributes
RecursiveMutex	cs
	critical section to protect the inner data structures More...

int	nIdCount
	last used nId More...

std::map< int, CAddrInfo >	mapInfo
	table with information about all nIds More...

std::map< CNetAddr, int >	mapAddr
	find an nId based on its network address More...

std::vector< int >	vRandom
	randomly-ordered vector of all nIds More...

int	nTried

int	vvTried [ADDRMAN_TRIED_BUCKET_COUNT][ADDRMAN_BUCKET_SIZE]
	list of "tried" buckets More...

int	nNew
	number of (unique) "new" entries More...

int	vvNew [ADDRMAN_NEW_BUCKET_COUNT][ADDRMAN_BUCKET_SIZE]
	list of "new" buckets More...

int64_t	nLastGood
	last time Good was called (memory only) More...

Detailed Description

Stochastical (IP) address manager.

Definition at line 182 of file addrman.h.

Constructor & Destructor Documentation

◆ CAddrMan()

CAddrMan::CAddrMan ( )

inline

Definition at line 474 of file addrman.h.

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◆ ~CAddrMan()

CAddrMan::~CAddrMan ( )

inline

Definition at line 479 of file addrman.h.

Member Function Documentation

◆ Add() [1/2]

bool CAddrMan::Add	(	const CAddress &	addr,
		const CNetAddr &	source,
		int64_t	nTimePenalty = `0`
	)

inline

Add a single address.

Definition at line 505 of file addrman.h.

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◆ Add() [2/2]

bool CAddrMan::Add	(	const std::vector< CAddress > &	vAddr,
		const CNetAddr &	source,
		int64_t	nTimePenalty = `0`
	)

inline

Add multiple addresses.

Definition at line 518 of file addrman.h.

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◆ Add_()

bool CAddrMan::Add_	(	const CAddress &	addr,
		const CNetAddr &	source,
		int64_t	nTimePenalty
	)

protected

Add an entry to the "new" table.

Definition at line 249 of file addrman.cpp.

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◆ Attempt()

void CAddrMan::Attempt	(	const CService &	addr,
		bool	fCountFailure,
		int64_t	nTime = `GetAdjustedTime()`
	)

inline

Mark an entry as connection attempted to.

Definition at line 541 of file addrman.h.

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◆ Attempt_()

void CAddrMan::Attempt_	(	const CService &	addr,
		bool	fCountFailure,
		int64_t	nTime
	)

protected

Mark an entry as attempted to connect.

Definition at line 322 of file addrman.cpp.

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◆ Check()

void CAddrMan::Check ( )

inline

Consistency check.

Definition at line 492 of file addrman.h.

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◆ Clear()

void CAddrMan::Clear ( )

inline

Definition at line 453 of file addrman.h.

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◆ ClearNew()

void CAddrMan::ClearNew	(	int	nUBucket,
		int	nUBucketPos
	)

protected

Clear a position in a "new" table. This is the only place where entries are actually deleted.

Definition at line 134 of file addrman.cpp.

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◆ Connected()

void CAddrMan::Connected	(	const CService &	addr,
		int64_t	nTime = `GetAdjustedTime()`
	)

inline

Mark an entry as currently-connected-to.

Definition at line 579 of file addrman.h.

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◆ Connected_()

void CAddrMan::Connected_	(	const CService &	addr,
		int64_t	nTime
	)

protected

Mark an entry as currently-connected-to.

Definition at line 489 of file addrman.cpp.

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◆ Create()

CAddrInfo * CAddrMan::Create	(	const CAddress &	addr,
		const CNetAddr &	addrSource,
		int *	pnId = `NULL`
	)

protected

find an entry, creating it if necessary.

nTime and nServices of the found node are updated, if necessary.

Definition at line 88 of file addrman.cpp.

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◆ Delete()

void CAddrMan::Delete ( int nId )

protected

Delete an entry. It must not be in tried, and have refcount 0.

Definition at line 120 of file addrman.cpp.

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◆ Find()

CAddrInfo * CAddrMan::Find	(	const CNetAddr &	addr,
		int *	pnId = `NULL`
	)

protected

Find an entry.

Definition at line 75 of file addrman.cpp.

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◆ GetAddr()

std::vector<CAddress> CAddrMan::GetAddr ( )

inline

Return a bunch of addresses, selected at random.

Definition at line 566 of file addrman.h.

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◆ GetAddr_()

void CAddrMan::GetAddr_ ( std::vector< CAddress > & vAddr )

protected

Select several addresses at once.

Definition at line 468 of file addrman.cpp.

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◆ GetSerializeSize()

unsigned int CAddrMan::GetSerializeSize	(	int	nType,
		int	nVersion
	)		const

inline

Definition at line 448 of file addrman.h.

◆ Good()

void CAddrMan::Good	(	const CService &	addr,
		int64_t	nTime = `GetAdjustedTime()`
	)

inline

Mark an entry as accessible.

Definition at line 532 of file addrman.h.

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◆ Good_()

void CAddrMan::Good_	(	const CService &	addr,
		int64_t	nTime
	)

protected

Mark an entry "good", possibly moving it from "new" to "tried".

Todo:: : maybe re-add the node, but for now, just bail out

Definition at line 197 of file addrman.cpp.

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◆ MakeTried()

void CAddrMan::MakeTried	(	CAddrInfo &	info,
		int	nId
	)

protected

Move an entry from the "new" table(s) to the "tried" table.

Definition at line 149 of file addrman.cpp.

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◆ RandomInt()

int CAddrMan::RandomInt ( int nMax )

protectedvirtual

Wraps GetRandInt to allow tests to override RandomInt and make it determinismistic.

Definition at line 509 of file addrman.cpp.

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◆ Select()

CAddrInfo CAddrMan::Select ( bool newOnly = false )

inline

Choose an address to connect to.

nUnkBias determines how much "new" entries are favored over "tried" ones (0-100).

Definition at line 553 of file addrman.h.

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◆ Select_()

CAddrInfo CAddrMan::Select_ ( bool newOnly )

protected

Select an address to connect to, if newOnly is set to true, only the new table is selected from.

Definition at line 344 of file addrman.cpp.

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◆ Serialize()

template<typename Stream >

void CAddrMan::Serialize	(	Stream &	s,
		int	nType,
		int	nVersionDummy
	)		const

inline

serialized format:

version byte (currently 1)
0x20 + nKey (serialized as if it were a vector, for backward compatibility)
nNew
nTried
number of "new" buckets XOR 2**30
all nNew addrinfos in vvNew
all nTried addrinfos in vvTried
for each bucket:
- number of elements
- for each element: index

2**30 is xorred with the number of buckets to make addrman deserializer v0 detect it as incompatible. This is necessary because it did not check the version number on deserialization.

Notice that vvTried, mapAddr and vVector are never encoded explicitly; they are instead reconstructed from the other information.

vvNew is serialized, but only used if ADDRMAN_UNKOWN_BUCKET_COUNT didn't change, otherwise it is reconstructed as well.

This format is more complex, but significantly smaller (at most 1.5 MiB), and supports changes to the ADDRMAN_ parameters without breaking the on-disk structure.

We don't use ADD_SERIALIZE_METHODS since the serialization and deserialization code has very little in common.

Definition at line 301 of file addrman.h.

◆ SetServices()

void CAddrMan::SetServices	(	const CService &	addr,
		ServiceFlags	nServices
	)

inline

Definition at line 587 of file addrman.h.

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◆ SetServices_()

void CAddrMan::SetServices_	(	const CService &	addr,
		ServiceFlags	nServices
	)

protected

Update an entry's service bits.

Definition at line 513 of file addrman.cpp.

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◆ size()

int CAddrMan::size ( )

inline

Return the number of (unique) addresses in all tables.

Todo:: : Cache this in an atomic to avoid this overhead

Definition at line 485 of file addrman.h.

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◆ SwapRandom()

void CAddrMan::SwapRandom	(	unsigned int	nRandomPos1,
		unsigned int	nRandomPos2
	)

protected

Swap two elements in vRandom.

Definition at line 100 of file addrman.cpp.

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◆ Unserialize()

template<typename Stream >

void CAddrMan::Unserialize	(	Stream &	s,
		int	nType,
		int	nVersionDummy
	)

inline

Definition at line 351 of file addrman.h.

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Member Data Documentation

◆ cs

RecursiveMutex CAddrMan::cs

mutableprivate

critical section to protect the inner data structures

Definition at line 186 of file addrman.h.

◆ insecure_rand

FastRandomContext CAddrMan::insecure_rand

protected

Source of random numbers for randomization in inner loops.

Definition at line 220 of file addrman.h.

◆ mapAddr

std::map<CNetAddr, int> CAddrMan::mapAddr

private

find an nId based on its network address

Definition at line 195 of file addrman.h.

◆ mapInfo

std::map<int, CAddrInfo> CAddrMan::mapInfo

private

table with information about all nIds

Definition at line 192 of file addrman.h.

◆ nIdCount

int CAddrMan::nIdCount

private

last used nId

Definition at line 189 of file addrman.h.

◆ nKey

uint256 CAddrMan::nKey

protected

secret key to randomize bucket select with

Definition at line 217 of file addrman.h.

◆ nLastGood

int64_t CAddrMan::nLastGood

private

last time Good was called (memory only)

Definition at line 213 of file addrman.h.

◆ nNew

int CAddrMan::nNew

private

number of (unique) "new" entries

Definition at line 207 of file addrman.h.

◆ nTried

int CAddrMan::nTried

private

Definition at line 201 of file addrman.h.

◆ vRandom

std::vector<int> CAddrMan::vRandom

private

randomly-ordered vector of all nIds

Definition at line 198 of file addrman.h.

◆ vvNew

int CAddrMan::vvNew[ADDRMAN_NEW_BUCKET_COUNT][ADDRMAN_BUCKET_SIZE]

private

list of "new" buckets

Definition at line 210 of file addrman.h.

◆ vvTried

int CAddrMan::vvTried[ADDRMAN_TRIED_BUCKET_COUNT][ADDRMAN_BUCKET_SIZE]

private

list of "tried" buckets

Definition at line 204 of file addrman.h.

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

src/addrman.h
src/addrman.cpp

Public Member Functions

Protected Member Functions

Protected Attributes

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ CAddrMan()

◆ ~CAddrMan()

Member Function Documentation

◆ Add() [1/2]

◆ Add() [2/2]

◆ Add_()

◆ Attempt()

◆ Attempt_()

◆ Check()

◆ Clear()

◆ ClearNew()

◆ Connected()

◆ Connected_()

◆ Create()

◆ Delete()

◆ Find()

◆ GetAddr()

◆ GetAddr_()

◆ GetSerializeSize()

◆ Good()

◆ Good_()

◆ MakeTried()

◆ RandomInt()

◆ Select()

◆ Select_()

◆ Serialize()

◆ SetServices()

◆ SetServices_()

◆ size()

◆ SwapRandom()

◆ Unserialize()

Member Data Documentation

◆ cs

◆ insecure_rand

◆ mapAddr

◆ mapInfo

◆ nIdCount

◆ nKey

◆ nLastGood

◆ nNew

◆ nTried

◆ vRandom

◆ vvNew

◆ vvTried