Struct Ipv6Addr 

pub struct Ipv6Addr(/* private fields */);

An IPv6 address parsed from configuration.

Methods from Deref<Target = Ipv6Addr>

pub const BITS: u32 = 128

pub const LOCALHOST: Ipv6Addr

pub const UNSPECIFIED: Ipv6Addr

pub fn segments(&self) -> [u16; 8]

Returns the eight 16-bit segments that make up this address.

Examples

use std::net::Ipv6Addr;

assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).segments(),
           [0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff]);

pub fn is_unspecified(&self) -> bool

Returns true for the special ‘unspecified’ address (::).

This property is defined in IETF RFC 4291.

Examples

use std::net::Ipv6Addr;

assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_unspecified(), false);
assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0).is_unspecified(), true);

pub fn is_loopback(&self) -> bool

Returns true if this is the loopback address (::1), as defined in IETF RFC 4291 section 2.5.3.

Contrary to IPv4, in IPv6 there is only one loopback address.

Examples

use std::net::Ipv6Addr;

assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_loopback(), false);
assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0x1).is_loopback(), true);

pub fn is_global(&self) -> bool

🔬This is a nightly-only experimental API. (ip)

Returns true if the address appears to be globally reachable as specified by the IANA IPv6 Special-Purpose Address Registry.

Whether or not an address is practically reachable will depend on your network configuration. Most IPv6 addresses are globally reachable, unless they are specifically defined as not globally reachable.

Non-exhaustive list of notable addresses that are not globally reachable:

• The unspecified address (is_unspecified)
• The loopback address (is_loopback)
• IPv4-mapped addresses
• Addresses reserved for benchmarking (is_benchmarking)
• Addresses reserved for documentation (is_documentation)
• Unique local addresses (is_unique_local)
• Unicast addresses with link-local scope (is_unicast_link_local)

For the complete overview of which addresses are globally reachable, see the table at the IANA IPv6 Special-Purpose Address Registry.

Note that an address having global scope is not the same as being globally reachable, and there is no direct relation between the two concepts: There exist addresses with global scope that are not globally reachable (for example unique local addresses), and addresses that are globally reachable without having global scope (multicast addresses with non-global scope).

Examples

#![feature(ip)]

use std::net::Ipv6Addr;

// Most IPv6 addresses are globally reachable:
assert_eq!(Ipv6Addr::new(0x26, 0, 0x1c9, 0, 0, 0xafc8, 0x10, 0x1).is_global(), true);

// However some addresses have been assigned a special meaning
// that makes them not globally reachable. Some examples are:

// The unspecified address (`::`)
assert_eq!(Ipv6Addr::UNSPECIFIED.is_global(), false);

// The loopback address (`::1`)
assert_eq!(Ipv6Addr::LOCALHOST.is_global(), false);

// IPv4-mapped addresses (`::ffff:0:0/96`)
assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_global(), false);

// Addresses reserved for benchmarking (`2001:2::/48`)
assert_eq!(Ipv6Addr::new(0x2001, 2, 0, 0, 0, 0, 0, 1,).is_global(), false);

// Addresses reserved for documentation (`2001:db8::/32` and `3fff::/20`)
assert_eq!(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 1).is_global(), false);
assert_eq!(Ipv6Addr::new(0x3fff, 0, 0, 0, 0, 0, 0, 0).is_global(), false);

// Unique local addresses (`fc00::/7`)
assert_eq!(Ipv6Addr::new(0xfc02, 0, 0, 0, 0, 0, 0, 1).is_global(), false);

// Unicast addresses with link-local scope (`fe80::/10`)
assert_eq!(Ipv6Addr::new(0xfe81, 0, 0, 0, 0, 0, 0, 1).is_global(), false);

// For a complete overview see the IANA IPv6 Special-Purpose Address Registry.

pub fn is_unique_local(&self) -> bool

Returns true if this is a unique local address (fc00::/7).

This property is defined in IETF RFC 4193.

Examples

use std::net::Ipv6Addr;

assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_unique_local(), false);
assert_eq!(Ipv6Addr::new(0xfc02, 0, 0, 0, 0, 0, 0, 0).is_unique_local(), true);

pub fn is_unicast(&self) -> bool

🔬This is a nightly-only experimental API. (ip)

Returns true if this is a unicast address, as defined by IETF RFC 4291. Any address that is not a multicast address (ff00::/8) is unicast.

Examples

#![feature(ip)]

use std::net::Ipv6Addr;

// The unspecified and loopback addresses are unicast.
assert_eq!(Ipv6Addr::UNSPECIFIED.is_unicast(), true);
assert_eq!(Ipv6Addr::LOCALHOST.is_unicast(), true);

// Any address that is not a multicast address (`ff00::/8`) is unicast.
assert_eq!(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 0).is_unicast(), true);
assert_eq!(Ipv6Addr::new(0xff00, 0, 0, 0, 0, 0, 0, 0).is_unicast(), false);

pub fn is_unicast_link_local(&self) -> bool

Returns true if the address is a unicast address with link-local scope, as defined in RFC 4291.

A unicast address has link-local scope if it has the prefix fe80::/10, as per RFC 4291 section 2.4. Note that this encompasses more addresses than those defined in RFC 4291 section 2.5.6, which describes “Link-Local IPv6 Unicast Addresses” as having the following stricter format:

| 10 bits  |         54 bits         |          64 bits           |
+----------+-------------------------+----------------------------+
|1111111010|           0             |       interface ID         |
+----------+-------------------------+----------------------------+

So while currently the only addresses with link-local scope an application will encounter are all in fe80::/64, this might change in the future with the publication of new standards. More addresses in fe80::/10 could be allocated, and those addresses will have link-local scope.

Also note that while RFC 4291 section 2.5.3 mentions about the loopback address (::1) that “it is treated as having Link-Local scope”, this does not mean that the loopback address actually has link-local scope and this method will return false on it.

Examples

use std::net::Ipv6Addr;

// The loopback address (`::1`) does not actually have link-local scope.
assert_eq!(Ipv6Addr::LOCALHOST.is_unicast_link_local(), false);

// Only addresses in `fe80::/10` have link-local scope.
assert_eq!(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 0).is_unicast_link_local(), false);
assert_eq!(Ipv6Addr::new(0xfe80, 0, 0, 0, 0, 0, 0, 0).is_unicast_link_local(), true);

// Addresses outside the stricter `fe80::/64` also have link-local scope.
assert_eq!(Ipv6Addr::new(0xfe80, 0, 0, 1, 0, 0, 0, 0).is_unicast_link_local(), true);
assert_eq!(Ipv6Addr::new(0xfe81, 0, 0, 0, 0, 0, 0, 0).is_unicast_link_local(), true);

pub fn is_documentation(&self) -> bool

🔬This is a nightly-only experimental API. (ip)

Returns true if this is an address reserved for documentation (2001:db8::/32 and 3fff::/20).

This property is defined by IETF RFC 3849 and IETF RFC 9637.

Examples

#![feature(ip)]

use std::net::Ipv6Addr;

assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_documentation(), false);
assert_eq!(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 0).is_documentation(), true);
assert_eq!(Ipv6Addr::new(0x3fff, 0, 0, 0, 0, 0, 0, 0).is_documentation(), true);

pub fn is_benchmarking(&self) -> bool

🔬This is a nightly-only experimental API. (ip)

Returns true if this is an address reserved for benchmarking (2001:2::/48).

This property is defined in IETF RFC 5180, where it is mistakenly specified as covering the range 2001:0200::/48. This is corrected in IETF RFC Errata 1752 to 2001:0002::/48.

#![feature(ip)]

use std::net::Ipv6Addr;

assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc613, 0x0).is_benchmarking(), false);
assert_eq!(Ipv6Addr::new(0x2001, 0x2, 0, 0, 0, 0, 0, 0).is_benchmarking(), true);

pub fn is_unicast_global(&self) -> bool

🔬This is a nightly-only experimental API. (ip)

Returns true if the address is a globally routable unicast address.

The following return false:

• the loopback address
• the link-local addresses
• unique local addresses
• the unspecified address
• the address range reserved for documentation

This method returns true for site-local addresses as per RFC 4291 section 2.5.7

The special behavior of [the site-local unicast] prefix defined in [RFC3513] must no longer
be supported in new implementations (i.e., new implementations must treat this prefix as
Global Unicast).

Examples

#![feature(ip)]

use std::net::Ipv6Addr;

assert_eq!(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 0).is_unicast_global(), false);
assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_unicast_global(), true);

pub fn multicast_scope(&self) -> Option<Ipv6MulticastScope>

🔬This is a nightly-only experimental API. (ip)

Returns the address’s multicast scope if the address is multicast.

Examples

#![feature(ip)]

use std::net::{Ipv6Addr, Ipv6MulticastScope};

assert_eq!(
    Ipv6Addr::new(0xff0e, 0, 0, 0, 0, 0, 0, 0).multicast_scope(),
    Some(Ipv6MulticastScope::Global)
);
assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).multicast_scope(), None);

pub fn is_multicast(&self) -> bool

Returns true if this is a multicast address (ff00::/8).

This property is defined by IETF RFC 4291.

Examples

use std::net::Ipv6Addr;

assert_eq!(Ipv6Addr::new(0xff00, 0, 0, 0, 0, 0, 0, 0).is_multicast(), true);
assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_multicast(), false);

pub fn is_ipv4_mapped(&self) -> bool

🔬This is a nightly-only experimental API. (ip)

Returns true if the address is an IPv4-mapped address (::ffff:0:0/96).

IPv4-mapped addresses can be converted to their canonical IPv4 address with to_ipv4_mapped.

Examples

#![feature(ip)]

use std::net::{Ipv4Addr, Ipv6Addr};

let ipv4_mapped = Ipv4Addr::new(192, 0, 2, 255).to_ipv6_mapped();
assert_eq!(ipv4_mapped.is_ipv4_mapped(), true);
assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc000, 0x2ff).is_ipv4_mapped(), true);

assert_eq!(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 0).is_ipv4_mapped(), false);

pub fn to_ipv4_mapped(&self) -> Option<Ipv4Addr>

Converts this address to an IPv4 address if it’s an IPv4-mapped address, as defined in IETF RFC 4291 section 2.5.5.2, otherwise returns None.

::ffff:a.b.c.d becomes a.b.c.d. All addresses not starting with ::ffff will return None.

Examples

use std::net::{Ipv4Addr, Ipv6Addr};

assert_eq!(Ipv6Addr::new(0xff00, 0, 0, 0, 0, 0, 0, 0).to_ipv4_mapped(), None);
assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).to_ipv4_mapped(),
           Some(Ipv4Addr::new(192, 10, 2, 255)));
assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1).to_ipv4_mapped(), None);

pub fn to_ipv4(&self) -> Option<Ipv4Addr>

Converts this address to an IPv4 address if it is either an IPv4-compatible address as defined in IETF RFC 4291 section 2.5.5.1, or an IPv4-mapped address as defined in IETF RFC 4291 section 2.5.5.2, otherwise returns None.

Note that this will return an IPv4 address for the IPv6 loopback address ::1. Use Ipv6Addr::to_ipv4_mapped to avoid this.

::a.b.c.d and ::ffff:a.b.c.d become a.b.c.d. ::1 becomes 0.0.0.1. All addresses not starting with either all zeroes or ::ffff will return None.

Examples

use std::net::{Ipv4Addr, Ipv6Addr};

assert_eq!(Ipv6Addr::new(0xff00, 0, 0, 0, 0, 0, 0, 0).to_ipv4(), None);
assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).to_ipv4(),
           Some(Ipv4Addr::new(192, 10, 2, 255)));
assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1).to_ipv4(),
           Some(Ipv4Addr::new(0, 0, 0, 1)));

pub fn to_canonical(&self) -> IpAddr

Converts this address to an IpAddr::V4 if it is an IPv4-mapped address, otherwise returns self wrapped in an IpAddr::V6.

Examples

use std::net::Ipv6Addr;

assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0x7f00, 0x1).is_loopback(), false);
assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0x7f00, 0x1).to_canonical().is_loopback(), true);

pub fn octets(&self) -> [u8; 16]

Returns the sixteen eight-bit integers the IPv6 address consists of.

use std::net::Ipv6Addr;

assert_eq!(Ipv6Addr::new(0xff00, 0, 0, 0, 0, 0, 0, 0).octets(),
           [0xff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]);

pub fn as_octets(&self) -> &[u8; 16]

🔬This is a nightly-only experimental API. (ip_as_octets)

Returns the sixteen eight-bit integers the IPv6 address consists of as a slice.

Examples

#![feature(ip_as_octets)]

use std::net::Ipv6Addr;

assert_eq!(Ipv6Addr::new(0xff00, 0, 0, 0, 0, 0, 0, 0).as_octets(),
           &[255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0])

Trait Implementations

impl Clone for Ipv6Addr

fn clone(&self) -> Ipv6Addr

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Ipv6Addr

impl Debug for Ipv6Addr

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Deref for Ipv6Addr

type Target = Ipv6Addr

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<'de> Deserialize<'de> for Ipv6Addr

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for Ipv6Addr

fn fmt(&self, __derive_more_f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Ipv6Addr

impl From<Ipv6Addr> for Ipv6Addr

fn from(value: Ipv6Addr) -> Self

Converts to this type from the input type.

impl FromStr for Ipv6Addr

type Err = <Ipv6Addr as FromStr>::Err

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for Ipv6Addr

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl JsonSchema for Ipv6Addr

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

impl PartialEq for Ipv6Addr

fn eq(&self, other: &Ipv6Addr) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Ipv6Addr

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Ipv6Addr

impl Validate for Ipv6Addr

fn validate<'a>(&self, _errors: ErrorCollector<'a>)

The default implementation of validate accepts all inputs.