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CNetAddr Class Reference

IP address (IPv6, or IPv4 using mapped IPv6 range (::FFFF:0:0/96)) More...

#include <netaddress.h>

Inheritance diagram for CNetAddr:
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Public Member Functions

 CNetAddr ()
 Construct an unspecified IPv6 network address (::/128). More...
 
 CNetAddr (const struct in_addr &ipv4Addr)
 
void SetIP (const CNetAddr &ip)
 
void SetRaw (Network network, const uint8_t *data)
 Set raw IPv4 or IPv6 address (in network byte order) More...
 
bool SetInternal (const std::string &name)
 Try to make this a dummy address that maps the specified name into IPv6 like so: (0xFD + sha256("bitcoin")[0:5]) + sha256(name)[0:10]. More...
 
bool SetSpecial (const std::string &strName)
 Try to make this a dummy address that maps the specified onion address into IPv6 using OnionCat's range and encoding. 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
 
bool IsLocal () const
 
bool IsRoutable () const
 
bool IsInternal () const
 
bool IsValid () const
 
enum Network GetNetwork () const
 
std::string ToString () const
 
std::string ToStringIP () const
 
unsigned int GetByte (int n) const
 
uint64_t GetHash () const
 
bool GetInAddr (struct in_addr *pipv4Addr) const
 Try to get our IPv4 address. More...
 
uint32_t 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...
 
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...
 
template<typename Stream , typename Operation >
void SerializationOp (Stream &s, Operation ser_action)
 

Public Attributes

 ADD_SERIALIZE_METHODS
 

Protected Attributes

unsigned char ip [16]
 
uint32_t scopeId {0}
 

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

IP address (IPv6, or IPv4 using mapped IPv6 range (::FFFF:0:0/96))

Definition at line 31 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 23 of file netaddress.cpp.

◆ CNetAddr() [2/3]

CNetAddr::CNetAddr ( const struct in_addr &  ipv4Addr)
explicit

Definition at line 99 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 104 of file netaddress.cpp.

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Member Function Documentation

◆ GetByte()

unsigned int CNetAddr::GetByte ( int  n) const

Definition at line 110 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 486 of file netaddress.cpp.

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◆ GetHash()

uint64_t CNetAddr::GetHash ( ) const

Definition at line 546 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]pipv6AddrThe 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 400 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]pipv4AddrThe 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 382 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 414 of file netaddress.cpp.

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◆ GetMappedAS()

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

Definition at line 446 of file netaddress.cpp.

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◆ GetNetClass()

uint32_t CNetAddr::GetNetClass ( ) const

Definition at line 429 of file netaddress.cpp.

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◆ GetNetwork()

enum Network CNetAddr::GetNetwork ( ) const

Definition at line 316 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 568 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 409 of file netaddress.cpp.

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◆ IsBindAny()

bool CNetAddr::IsBindAny ( ) const

Definition at line 115 of file netaddress.cpp.

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◆ IsHeNet()

bool CNetAddr::IsHeNet ( ) const

Definition at line 213 of file netaddress.cpp.

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◆ IsInternal()

bool CNetAddr::IsInternal ( ) const
Returns
Whether or not this is a dummy address that maps a name into IPv6.
See also
CNetAddr::SetInternal(const std::string &)

Definition at line 311 of file netaddress.cpp.

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◆ IsIPv4()

bool CNetAddr::IsIPv4 ( ) const

Definition at line 125 of file netaddress.cpp.

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◆ IsIPv6()

bool CNetAddr::IsIPv6 ( ) const

Definition at line 130 of file netaddress.cpp.

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◆ IsLocal()

bool CNetAddr::IsLocal ( ) const

Definition at line 229 of file netaddress.cpp.

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◆ IsRFC1918()

bool CNetAddr::IsRFC1918 ( ) const

Definition at line 135 of file netaddress.cpp.

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◆ IsRFC2544()

bool CNetAddr::IsRFC2544 ( ) const

Definition at line 143 of file netaddress.cpp.

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◆ IsRFC3849()

bool CNetAddr::IsRFC3849 ( ) const

Definition at line 165 of file netaddress.cpp.

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◆ IsRFC3927()

bool CNetAddr::IsRFC3927 ( ) const

Definition at line 148 of file netaddress.cpp.

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◆ IsRFC3964()

bool CNetAddr::IsRFC3964 ( ) const

Definition at line 170 of file netaddress.cpp.

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◆ IsRFC4193()

bool CNetAddr::IsRFC4193 ( ) const

Definition at line 192 of file netaddress.cpp.

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◆ IsRFC4380()

bool CNetAddr::IsRFC4380 ( ) const

Definition at line 181 of file netaddress.cpp.

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◆ IsRFC4843()

bool CNetAddr::IsRFC4843 ( ) const

Definition at line 203 of file netaddress.cpp.

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◆ IsRFC4862()

bool CNetAddr::IsRFC4862 ( ) const

Definition at line 186 of file netaddress.cpp.

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◆ IsRFC5737()

bool CNetAddr::IsRFC5737 ( ) const

Definition at line 158 of file netaddress.cpp.

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◆ IsRFC6052()

bool CNetAddr::IsRFC6052 ( ) const

Definition at line 175 of file netaddress.cpp.

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◆ IsRFC6145()

bool CNetAddr::IsRFC6145 ( ) const

Definition at line 197 of file netaddress.cpp.

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◆ IsRFC6598()

bool CNetAddr::IsRFC6598 ( ) const

Definition at line 153 of file netaddress.cpp.

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◆ IsRFC7343()

bool CNetAddr::IsRFC7343 ( ) const

Definition at line 208 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 301 of file netaddress.cpp.

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◆ IsTor()

bool CNetAddr::IsTor ( ) const
Returns
Whether or not this is a dummy address that maps an onion address into IPv6.
See also
CNetAddr::SetSpecial(const std::string &)

Definition at line 224 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 253 of file netaddress.cpp.

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◆ SerializationOp()

template<typename Stream , typename Operation >
void CNetAddr::SerializationOp ( Stream &  s,
Operation  ser_action 
)
inline

Definition at line 105 of file netaddress.h.

◆ SetInternal()

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

Try to make this a dummy address that maps the specified name into IPv6 like so: (0xFD + sha256("bitcoin")[0:5]) + sha256(name)[0:10].

Such dummy addresses have a prefix of fd6b:88c0:8724::/48 and are guaranteed to not be publicly routable as it falls under RFC4193's fc00::/7 subnet allocated to unique-local addresses.

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

Returns
Whether or not the operation was successful.
See also
CNetAddr::IsInternal(), CNetAddr::IsRFC4193()

Definition at line 63 of file netaddress.cpp.

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◆ SetIP()

void CNetAddr::SetIP ( const CNetAddr ip)

Definition at line 28 of file netaddress.cpp.

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◆ SetRaw()

void CNetAddr::SetRaw ( Network  network,
const uint8_t *  data 
)

Set raw IPv4 or IPv6 address (in network byte order)

Note
Only NET_IPV4 and NET_IPV6 are allowed for network.

Definition at line 33 of file netaddress.cpp.

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◆ SetSpecial()

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

Try to make this a dummy address that maps the specified onion address into IPv6 using OnionCat's range and encoding.

Such dummy addresses have a prefix of fd87:d87e:eb43::/48 and are guaranteed to not be publicly routable as they fall under RFC4193's fc00::/7 subnet allocated to unique-local addresses.

Returns
Whether or not the operation was successful.
See also
CNetAddr::IsTor(), CNetAddr::IsRFC4193()

Definition at line 85 of file netaddress.cpp.

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◆ ToString()

std::string CNetAddr::ToString ( ) const

Definition at line 357 of file netaddress.cpp.

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◆ ToStringIP()

std::string CNetAddr::ToStringIP ( ) const

Definition at line 333 of file netaddress.cpp.

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Friends And Related Function Documentation

◆ CSubNet

friend class CSubNet
friend

Definition at line 109 of file netaddress.h.

◆ operator!=

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

Definition at line 99 of file netaddress.h.

◆ operator<

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

Definition at line 367 of file netaddress.cpp.

◆ operator==

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

Definition at line 362 of file netaddress.cpp.

Member Data Documentation

◆ ADD_SERIALIZE_METHODS

CNetAddr::ADD_SERIALIZE_METHODS

Definition at line 102 of file netaddress.h.

◆ ip

unsigned char CNetAddr::ip[16]
protected

Definition at line 34 of file netaddress.h.

◆ scopeId

uint32_t CNetAddr::scopeId {0}
protected

Definition at line 35 of file netaddress.h.


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