Network address. More...

#include <netaddress.h>

Inheritance diagram for CNetAddr:

Collaboration diagram for CNetAddr:

Public Member Functions
	CNetAddr ()
	Construct an unspecified IPv6 network address (::/128). More...

	CNetAddr (const struct in_addr &ipv4Addr)

void	SetIP (const CNetAddr &ip)

void	SetLegacyIPv6 (Span< const uint8_t > ipv6)
	Set from a legacy IPv6 address. More...

bool	SetInternal (const std::string &name)
	Create an "internal" address that represents a name or FQDN. More...

bool	SetSpecial (const std::string &strName)
	Parse a TOR address and set this object to it. More...

bool	IsBindAny () const

bool	IsIPv4 () const

bool	IsIPv6 () const

bool	IsRFC1918 () const

bool	IsRFC2544 () const

bool	IsRFC6598 () const

bool	IsRFC5737 () const

bool	IsRFC3849 () const

bool	IsRFC3927 () const

bool	IsRFC3964 () const

bool	IsRFC4193 () const

bool	IsRFC4380 () const

bool	IsRFC4843 () const

bool	IsRFC7343 () const

bool	IsRFC4862 () const

bool	IsRFC6052 () const

bool	IsRFC6145 () const

bool	IsHeNet () const

bool	IsTor () const
	Check whether this object represents a TOR address. More...

bool	IsI2P () const
	Check whether this object represents an I2P address. More...

bool	IsCJDNS () const
	Check whether this object represents a CJDNS address. More...

bool	IsLocal () const

bool	IsRoutable () const

bool	IsInternal () const

bool	IsValid () const

bool	IsAddrV1Compatible () const
	Check if the current object can be serialized in pre-ADDRv2/BIP155 format. More...

enum Network	GetNetwork () const

std::string	ToString () const

std::string	ToStringIP () const

uint64_t	GetHash () const

bool	GetInAddr (struct in_addr *pipv4Addr) const
	Try to get our IPv4 address. More...

Network	GetNetClass () const

uint32_t	GetLinkedIPv4 () const
	For IPv4, mapped IPv4, SIIT translated IPv4, Teredo, 6to4 tunneled addresses, return the relevant IPv4 address as a uint32. More...

bool	HasLinkedIPv4 () const
	Whether this address has a linked IPv4 address (see GetLinkedIPv4()). More...

uint32_t	GetMappedAS (const std::vector< bool > &asmap) const

std::vector< unsigned char >	GetGroup (const std::vector< bool > &asmap) const
	Get the canonical identifier of our network group. More...

std::vector< unsigned char >	GetAddrBytes () const

int	GetReachabilityFrom (const CNetAddr *paddrPartner=nullptr) const
	Calculates a metric for how reachable (*this) is from a given partner. More...

	CNetAddr (const struct in6_addr &pipv6Addr, const uint32_t scope=0)

bool	GetIn6Addr (struct in6_addr *pipv6Addr) const
	Try to get our IPv6 address. More...

bool	IsRelayable () const
	Whether this address should be relayed to other peers even if we can't reach it ourselves. More...

template<typename Stream >
void	Serialize (Stream &s) const
	Serialize to a stream. More...

template<typename Stream >
void	Unserialize (Stream &s)
	Unserialize from a stream. More...

Protected Attributes
prevector< ADDR_IPV6_SIZE, uint8_t >	m_addr {ADDR_IPV6_SIZE, 0x0}
	Raw representation of the network address. More...

Network	m_net {NET_IPV6}
	Network to which this address belongs. More...

uint32_t	m_scope_id {0}
	Scope id if scoped/link-local IPV6 address. More...

Private Types
enum	BIP155Network : uint8_t { IPV4 = 1, IPV6 = 2, TORV2 = 3, TORV3 = 4, I2P = 5, CJDNS = 6 }
	BIP155 network ids recognized by this software. More...

Private Member Functions
BIP155Network	GetBIP155Network () const
	Get the BIP155 network id of this address. More...

bool	SetNetFromBIP155Network (uint8_t possible_bip155_net, size_t address_size)
	Set `m_net` from the provided BIP155 network id and size after validation. More...

void	SerializeV1Array (uint8_t(&arr)[V1_SERIALIZATION_SIZE]) const
	Serialize in pre-ADDRv2/BIP155 format to an array. More...

template<typename Stream >
void	SerializeV1Stream (Stream &s) const
	Serialize in pre-ADDRv2/BIP155 format to a stream. More...

template<typename Stream >
void	SerializeV2Stream (Stream &s) const
	Serialize as ADDRv2 / BIP155. More...

void	UnserializeV1Array (uint8_t(&arr)[V1_SERIALIZATION_SIZE])
	Unserialize from a pre-ADDRv2/BIP155 format from an array. More...

template<typename Stream >
void	UnserializeV1Stream (Stream &s)
	Unserialize from a pre-ADDRv2/BIP155 format from a stream. More...

template<typename Stream >
void	UnserializeV2Stream (Stream &s)
	Unserialize from a ADDRv2 / BIP155 format. More...

Static Private Attributes
static constexpr size_t	V1_SERIALIZATION_SIZE = ADDR_IPV6_SIZE
	Size of CNetAddr when serialized as ADDRv1 (pre-BIP155) (in bytes). More...

static constexpr size_t	MAX_ADDRV2_SIZE = 512
	Maximum size of an address as defined in BIP155 (in bytes). More...

Friends
class	CSubNet

bool	operator== (const CNetAddr &a, const CNetAddr &b)

bool	operator!= (const CNetAddr &a, const CNetAddr &b)

bool	operator< (const CNetAddr &a, const CNetAddr &b)

Detailed Description

Network address.

Definition at line 119 of file netaddress.h.

Member Enumeration Documentation

◆ BIP155Network

enum CNetAddr::BIP155Network : uint8_t

private

BIP155 network ids recognized by this software.

Enumerator
IPV4
IPV6
TORV2
TORV3
I2P
CJDNS

Definition at line 254 of file netaddress.h.

Constructor & Destructor Documentation

◆ CNetAddr() [1/3]

CNetAddr::CNetAddr ( )

Construct an unspecified IPv6 network address (::/128).

Note: This address is considered invalid by CNetAddr::IsValid()

Definition at line 120 of file netaddress.cpp.

◆ CNetAddr() [2/3]

CNetAddr::CNetAddr ( const struct in_addr & ipv4Addr )

explicit

Definition at line 278 of file netaddress.cpp.

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◆ CNetAddr() [3/3]

CNetAddr::CNetAddr	(	const struct in6_addr &	pipv6Addr,
		const uint32_t	scope = `0`
	)

explicit

Definition at line 285 of file netaddress.cpp.

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Member Function Documentation

◆ GetAddrBytes()

std::vector< unsigned char > CNetAddr::GetAddrBytes ( ) const

Definition at line 774 of file netaddress.cpp.

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◆ GetBIP155Network()

CNetAddr::BIP155Network CNetAddr::GetBIP155Network ( ) const

private

Get the BIP155 network id of this address.

Must not be called for IsInternal() objects.

Returns: BIP155 network id

Definition at line 27 of file netaddress.cpp.

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◆ GetGroup()

std::vector< unsigned char > CNetAddr::GetGroup ( const std::vector< bool > & asmap ) const

Get the canonical identifier of our network group.

The groups are assigned in a way where it should be costly for an attacker to obtain addresses with many different group identifiers, even if it is cheap to obtain addresses with the same identifier.

Note: No two connections will be attempted to addresses with the same network group.

Definition at line 720 of file netaddress.cpp.

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◆ GetHash()

uint64_t CNetAddr::GetHash ( ) const

Definition at line 784 of file netaddress.cpp.

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◆ GetIn6Addr()

bool CNetAddr::GetIn6Addr ( struct in6_addr * pipv6Addr ) const

Try to get our IPv6 address.

Parameters

[out] pipv6Addr The in6_addr struct to which to copy.

Returns: Whether or not the operation was successful, in particular, whether or not our address was an IPv6 address.

See also: CNetAddr::IsIPv6()

Definition at line 629 of file netaddress.cpp.

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◆ GetInAddr()

bool CNetAddr::GetInAddr ( struct in_addr * pipv4Addr ) const

Try to get our IPv4 address.

Parameters

[out] pipv4Addr The in_addr struct to which to copy.

Returns: Whether or not the operation was successful, in particular, whether or not our address was an IPv4 address.

See also: CNetAddr::IsIPv4()

Definition at line 610 of file netaddress.cpp.

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◆ GetLinkedIPv4()

uint32_t CNetAddr::GetLinkedIPv4 ( ) const

For IPv4, mapped IPv4, SIIT translated IPv4, Teredo, 6to4 tunneled addresses, return the relevant IPv4 address as a uint32.

Definition at line 644 of file netaddress.cpp.

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◆ GetMappedAS()

uint32_t CNetAddr::GetMappedAS ( const std::vector< bool > & asmap ) const

Definition at line 679 of file netaddress.cpp.

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◆ GetNetClass()

Network CNetAddr::GetNetClass ( ) const

Definition at line 661 of file netaddress.cpp.

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◆ GetNetwork()

enum Network CNetAddr::GetNetwork ( ) const

Definition at line 506 of file netaddress.cpp.

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◆ GetReachabilityFrom()

int CNetAddr::GetReachabilityFrom ( const CNetAddr * paddrPartner = nullptr ) const

Calculates a metric for how reachable (*this) is from a given partner.

Definition at line 806 of file netaddress.cpp.

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◆ HasLinkedIPv4()

bool CNetAddr::HasLinkedIPv4 ( ) const

Whether this address has a linked IPv4 address (see GetLinkedIPv4()).

Definition at line 639 of file netaddress.cpp.

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◆ IsAddrV1Compatible()

bool CNetAddr::IsAddrV1Compatible ( ) const

Check if the current object can be serialized in pre-ADDRv2/BIP155 format.

Definition at line 486 of file netaddress.cpp.

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◆ IsBindAny()

bool CNetAddr::IsBindAny ( ) const

Definition at line 291 of file netaddress.cpp.

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◆ IsCJDNS()

bool CNetAddr::IsCJDNS ( ) const

Check whether this object represents a CJDNS address.

Definition at line 404 of file netaddress.cpp.

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◆ IsHeNet()

bool CNetAddr::IsHeNet ( ) const

Definition at line 385 of file netaddress.cpp.

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◆ IsI2P()

bool CNetAddr::IsI2P ( ) const

Check whether this object represents an I2P address.

Definition at line 399 of file netaddress.cpp.

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◆ IsInternal()

bool CNetAddr::IsInternal ( ) const

Returns: Whether or not this is a dummy address that represents a name.

See also: CNetAddr::SetInternal(const std::string &)

Definition at line 481 of file netaddress.cpp.

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◆ IsIPv4()

bool CNetAddr::IsIPv4 ( ) const

Definition at line 299 of file netaddress.cpp.

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◆ IsIPv6()

bool CNetAddr::IsIPv6 ( ) const

Definition at line 301 of file netaddress.cpp.

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◆ IsLocal()

bool CNetAddr::IsLocal ( ) const

Definition at line 406 of file netaddress.cpp.

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◆ IsRelayable()

bool CNetAddr::IsRelayable ( ) const

inline

Whether this address should be relayed to other peers even if we can't reach it ourselves.

Definition at line 217 of file netaddress.h.

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◆ IsRFC1918()

bool CNetAddr::IsRFC1918 ( ) const

Definition at line 303 of file netaddress.cpp.

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◆ IsRFC2544()

bool CNetAddr::IsRFC2544 ( ) const

Definition at line 311 of file netaddress.cpp.

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◆ IsRFC3849()

bool CNetAddr::IsRFC3849 ( ) const

Definition at line 333 of file netaddress.cpp.

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◆ IsRFC3927()

bool CNetAddr::IsRFC3927 ( ) const

Definition at line 316 of file netaddress.cpp.

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◆ IsRFC3964()

bool CNetAddr::IsRFC3964 ( ) const

Definition at line 338 of file netaddress.cpp.

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◆ IsRFC4193()

bool CNetAddr::IsRFC4193 ( ) const

Definition at line 361 of file netaddress.cpp.

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◆ IsRFC4380()

bool CNetAddr::IsRFC4380 ( ) const

Definition at line 350 of file netaddress.cpp.

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◆ IsRFC4843()

bool CNetAddr::IsRFC4843 ( ) const

Definition at line 373 of file netaddress.cpp.

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◆ IsRFC4862()

bool CNetAddr::IsRFC4862 ( ) const

Definition at line 355 of file netaddress.cpp.

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◆ IsRFC5737()

bool CNetAddr::IsRFC5737 ( ) const

Definition at line 326 of file netaddress.cpp.

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◆ IsRFC6052()

bool CNetAddr::IsRFC6052 ( ) const

Definition at line 343 of file netaddress.cpp.

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◆ IsRFC6145()

bool CNetAddr::IsRFC6145 ( ) const

Definition at line 366 of file netaddress.cpp.

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◆ IsRFC6598()

bool CNetAddr::IsRFC6598 ( ) const

Definition at line 321 of file netaddress.cpp.

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◆ IsRFC7343()

bool CNetAddr::IsRFC7343 ( ) const

Definition at line 379 of file netaddress.cpp.

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◆ IsRoutable()

bool CNetAddr::IsRoutable ( ) const

Returns: Whether or not this network address is publicly routable on the global internet.

Note: A routable address is always valid. As in, the set of routable addresses is a subset of the set of valid addresses.

See also: CNetAddr::IsValid()

Definition at line 471 of file netaddress.cpp.

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◆ IsTor()

bool CNetAddr::IsTor ( ) const

Check whether this object represents a TOR address.

See also: CNetAddr::SetSpecial(const std::string &)

Definition at line 394 of file netaddress.cpp.

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◆ IsValid()

bool CNetAddr::IsValid ( ) const

Returns: Whether or not this network address is a valid address that could be used to refer to an actual host.

Note: A valid address may or may not be publicly routable on the global internet. As in, the set of valid addresses is a superset of the set of publicly routable addresses.

See also: CNetAddr::IsRoutable()

Definition at line 432 of file netaddress.cpp.

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◆ Serialize()

template<typename Stream >

void CNetAddr::Serialize ( Stream & s ) const

inline

Serialize to a stream.

Definition at line 226 of file netaddress.h.

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◆ SerializeV1Array()

void CNetAddr::SerializeV1Array ( uint8_t(&) arr[V1_SERIALIZATION_SIZE] ) const

inlineprivate

Serialize in pre-ADDRv2/BIP155 format to an array.

Definition at line 294 of file netaddress.h.

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◆ SerializeV1Stream()

template<typename Stream >

void CNetAddr::SerializeV1Stream ( Stream & s ) const

inlineprivate

Serialize in pre-ADDRv2/BIP155 format to a stream.

Definition at line 341 of file netaddress.h.

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◆ SerializeV2Stream()

template<typename Stream >

void CNetAddr::SerializeV2Stream ( Stream & s ) const

inlineprivate

Serialize as ADDRv2 / BIP155.

Definition at line 354 of file netaddress.h.

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◆ SetInternal()

bool CNetAddr::SetInternal ( const std::string & name )

Create an "internal" address that represents a name or FQDN.

CAddrMan uses these fake addresses to keep track of which DNS seeds were used.

Returns: Whether or not the operation was successful.

See also: NET_INTERNAL, INTERNAL_IN_IPV6_PREFIX, CNetAddr::IsInternal(), CNetAddr::IsRFC4193()

Definition at line 185 of file netaddress.cpp.

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◆ SetIP()

void CNetAddr::SetIP ( const CNetAddr & ip )

Definition at line 122 of file netaddress.cpp.

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◆ SetLegacyIPv6()

void CNetAddr::SetLegacyIPv6 ( Span< const uint8_t > ipv6 )

Set from a legacy IPv6 address.

Legacy IPv6 address may be a normal IPv6 address, or another address (e.g. IPv4) disguised as IPv6. This encoding is used in the legacy addr encoding.

Definition at line 153 of file netaddress.cpp.

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◆ SetNetFromBIP155Network()

bool CNetAddr::SetNetFromBIP155Network	(	uint8_t	possible_bip155_net,
		size_t	address_size
	)

private

Set m_net from the provided BIP155 network id and size after validation.

Return values

true	the network was recognized, is valid and `m_net` was set
false	not recognised (from future?) and should be silently ignored

Exceptions

std::ios_base::failure if the network is one of the BIP155 founding networks (id 1..6) with wrong address size.

Definition at line 56 of file netaddress.cpp.

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◆ SetSpecial()

bool CNetAddr::SetSpecial ( const std::string & str )

Parse a TOR address and set this object to it.

Returns: Whether or not the operation was successful.

See also: CNetAddr::IsTor()

Definition at line 231 of file netaddress.cpp.

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◆ ToString()

std::string CNetAddr::ToString ( ) const

Definition at line 585 of file netaddress.cpp.

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◆ ToStringIP()

std::string CNetAddr::ToStringIP ( ) const

Definition at line 533 of file netaddress.cpp.

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◆ Unserialize()

template<typename Stream >

void CNetAddr::Unserialize ( Stream & s )

inline

Unserialize from a stream.

Definition at line 239 of file netaddress.h.

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◆ UnserializeV1Array()

void CNetAddr::UnserializeV1Array ( uint8_t(&) arr[V1_SERIALIZATION_SIZE] )

inlineprivate

Unserialize from a pre-ADDRv2/BIP155 format from an array.

Definition at line 372 of file netaddress.h.

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◆ UnserializeV1Stream()

template<typename Stream >

void CNetAddr::UnserializeV1Stream ( Stream & s )

inlineprivate

Unserialize from a pre-ADDRv2/BIP155 format from a stream.

Definition at line 383 of file netaddress.h.

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◆ UnserializeV2Stream()

template<typename Stream >

void CNetAddr::UnserializeV2Stream ( Stream & s )

inlineprivate

Unserialize from a ADDRv2 / BIP155 format.

Definition at line 396 of file netaddress.h.

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Friends And Related Function Documentation

◆ CSubNet

friend class CSubNet

friend

Definition at line 248 of file netaddress.h.

◆ operator!=

bool operator!=	(	const CNetAddr &	a,
		const CNetAddr &	b
	)

friend

Definition at line 211 of file netaddress.h.

◆ operator<

bool operator<	(	const CNetAddr &	a,
		const CNetAddr &	b
	)

friend

Definition at line 595 of file netaddress.cpp.

◆ operator==

bool operator==	(	const CNetAddr &	a,
		const CNetAddr &	b
	)

friend

Definition at line 590 of file netaddress.cpp.

Member Data Documentation

◆ m_addr

prevector<ADDR_IPV6_SIZE, uint8_t> CNetAddr::m_addr {ADDR_IPV6_SIZE, 0x0}

protected

Raw representation of the network address.

In network byte order (big endian) for IPv4 and IPv6.

Definition at line 126 of file netaddress.h.

◆ m_net

Network CNetAddr::m_net {NET_IPV6}

protected

Network to which this address belongs.

Definition at line 131 of file netaddress.h.

◆ m_scope_id

uint32_t CNetAddr::m_scope_id {0}

protected

Scope id if scoped/link-local IPV6 address.

See https://tools.ietf.org/html/rfc4007

Definition at line 137 of file netaddress.h.

◆ MAX_ADDRV2_SIZE

constexpr size_t CNetAddr::MAX_ADDRV2_SIZE = 512

staticprivate

Maximum size of an address as defined in BIP155 (in bytes).

This is only the size of the address, not the entire CNetAddr object when serialized.

Definition at line 273 of file netaddress.h.

◆ V1_SERIALIZATION_SIZE

constexpr size_t CNetAddr::V1_SERIALIZATION_SIZE = ADDR_IPV6_SIZE

staticprivate

Size of CNetAddr when serialized as ADDRv1 (pre-BIP155) (in bytes).

Definition at line 266 of file netaddress.h.

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

src/netaddress.h
src/netaddress.cpp

Public Member Functions

Protected Attributes

Private Types

Private Member Functions

Static Private Attributes

Friends

Detailed Description

Member Enumeration Documentation

◆ BIP155Network

Constructor & Destructor Documentation

◆ CNetAddr() [1/3]

◆ CNetAddr() [2/3]

◆ CNetAddr() [3/3]

Member Function Documentation

◆ GetAddrBytes()

◆ GetBIP155Network()

◆ GetGroup()

◆ GetHash()

◆ GetIn6Addr()

◆ GetInAddr()

◆ GetLinkedIPv4()

◆ GetMappedAS()

◆ GetNetClass()

◆ GetNetwork()

◆ GetReachabilityFrom()

◆ HasLinkedIPv4()

◆ IsAddrV1Compatible()

◆ IsBindAny()

◆ IsCJDNS()

◆ IsHeNet()

◆ IsI2P()

◆ IsInternal()

◆ IsIPv4()

◆ IsIPv6()

◆ IsLocal()

◆ IsRelayable()

◆ IsRFC1918()

◆ IsRFC2544()

◆ IsRFC3849()

◆ IsRFC3927()

◆ IsRFC3964()

◆ IsRFC4193()

◆ IsRFC4380()

◆ IsRFC4843()

◆ IsRFC4862()

◆ IsRFC5737()

◆ IsRFC6052()

◆ IsRFC6145()

◆ IsRFC6598()

◆ IsRFC7343()

◆ IsRoutable()

◆ IsTor()

◆ IsValid()

◆ Serialize()

◆ SerializeV1Array()

◆ SerializeV1Stream()

◆ SerializeV2Stream()

◆ SetInternal()

◆ SetIP()

◆ SetLegacyIPv6()

◆ SetNetFromBIP155Network()

◆ SetSpecial()

◆ ToString()

◆ ToStringIP()

◆ Unserialize()

◆ UnserializeV1Array()

◆ UnserializeV1Stream()

◆ UnserializeV2Stream()

Friends And Related Function Documentation

◆ CSubNet

◆ operator!=

◆ operator<

◆ operator==

Member Data Documentation

◆ m_addr

◆ m_net

◆ m_scope_id

◆ MAX_ADDRV2_SIZE

◆ V1_SERIALIZATION_SIZE