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Diffstat (limited to 'vendor/rustix/src/net/ip.rs')
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diff --git a/vendor/rustix/src/net/ip.rs b/vendor/rustix/src/net/ip.rs new file mode 100644 index 000000000..7c587cc7a --- /dev/null +++ b/vendor/rustix/src/net/ip.rs @@ -0,0 +1,2059 @@ +//! The following is derived from Rust's +//! library/std/src/net/ip.rs at revision +//! dca3f1b786efd27be3b325ed1e01e247aa589c3b. +//! +//! This defines `IpAddr`, `Ipv4Addr`, and `Ipv6Addr`. Ideally, these should be +//! defined in `core`. See [RFC 2832]. +//! +//! [RFC 2832]: https://github.com/rust-lang/rfcs/pull/2832 + +#![allow(unsafe_code)] + +use crate::imp::c; +use crate::imp::net::ext::{in6_addr_new, in6_addr_s6_addr, in_addr_new, in_addr_s_addr}; +use core::cmp::Ordering; +use core::hash; +use core::mem::transmute; + +/// An IP address, either IPv4 or IPv6. +/// +/// This enum can contain either an [`Ipv4Addr`] or an [`Ipv6Addr`], see their +/// respective documentation for more details. +/// +/// The size of an `IpAddr` instance may vary depending on the target operating +/// system. +/// +/// # Examples +/// +/// ``` +/// use std::net::{IpAddr, Ipv4Addr, Ipv6Addr}; +/// +/// let localhost_v4 = IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)); +/// let localhost_v6 = IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1)); +/// +/// assert_eq!("127.0.0.1".parse(), Ok(localhost_v4)); +/// assert_eq!("::1".parse(), Ok(localhost_v6)); +/// +/// assert_eq!(localhost_v4.is_ipv6(), false); +/// assert_eq!(localhost_v4.is_ipv4(), true); +/// ``` +#[cfg_attr(staged_api, stable(feature = "ip_addr", since = "1.7.0"))] +#[derive(Copy, Clone, Eq, PartialEq, Hash, PartialOrd, Ord)] +pub enum IpAddr { + /// An IPv4 address. + #[cfg_attr(staged_api, stable(feature = "ip_addr", since = "1.7.0"))] + V4(#[cfg_attr(staged_api, stable(feature = "ip_addr", since = "1.7.0"))] Ipv4Addr), + /// An IPv6 address. + #[cfg_attr(staged_api, stable(feature = "ip_addr", since = "1.7.0"))] + V6(#[cfg_attr(staged_api, stable(feature = "ip_addr", since = "1.7.0"))] Ipv6Addr), +} + +/// An IPv4 address. +/// +/// IPv4 addresses are defined as 32-bit integers in [IETF RFC 791]. +/// They are usually represented as four octets. +/// +/// See [`IpAddr`] for a type encompassing both IPv4 and IPv6 addresses. +/// +/// The size of an `Ipv4Addr` struct may vary depending on the target operating +/// system. +/// +/// [IETF RFC 791]: https://tools.ietf.org/html/rfc791 +/// +/// # Textual representation +/// +/// `Ipv4Addr` provides a [`FromStr`] implementation. The four octets are in decimal +/// notation, divided by `.` (this is called "dot-decimal notation"). +/// Notably, octal numbers (which are indicated with a leading `0`) and hexadecimal numbers (which +/// are indicated with a leading `0x`) are not allowed per [IETF RFC 6943]. +/// +/// [IETF RFC 6943]: https://tools.ietf.org/html/rfc6943#section-3.1.1 +/// [`FromStr`]: core::str::FromStr +/// +/// # Examples +/// +/// ``` +/// use std::net::Ipv4Addr; +/// +/// let localhost = Ipv4Addr::new(127, 0, 0, 1); +/// assert_eq!("127.0.0.1".parse(), Ok(localhost)); +/// assert_eq!(localhost.is_loopback(), true); +/// assert!("012.004.002.000".parse::<Ipv4Addr>().is_err()); // all octets are in octal +/// assert!("0000000.0.0.0".parse::<Ipv4Addr>().is_err()); // first octet is a zero in octal +/// assert!("0xcb.0x0.0x71.0x00".parse::<Ipv4Addr>().is_err()); // all octets are in hex +/// ``` +#[derive(Copy)] +#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] +pub struct Ipv4Addr { + pub(crate) inner: c::in_addr, +} + +/// An IPv6 address. +/// +/// IPv6 addresses are defined as 128-bit integers in [IETF RFC 4291]. +/// They are usually represented as eight 16-bit segments. +/// +/// The size of an `Ipv6Addr` struct may vary depending on the target operating +/// system. +/// +/// [IETF RFC 4291]: https://tools.ietf.org/html/rfc4291 +/// +/// # Embedding IPv4 Addresses +/// +/// See [`IpAddr`] for a type encompassing both IPv4 and IPv6 addresses. +/// +/// To assist in the transition from IPv4 to IPv6 two types of IPv6 addresses that embed an IPv4 address were defined: +/// IPv4-compatible and IPv4-mapped addresses. Of these IPv4-compatible addresses have been officially deprecated. +/// +/// Both types of addresses are not assigned any special meaning by this implementation, +/// other than what the relevant standards prescribe. This means that an address like `::ffff:127.0.0.1`, +/// while representing an IPv4 loopback address, is not itself an IPv6 loopback address; only `::1` is. +/// To handle these so called "IPv4-in-IPv6" addresses, they have to first be converted to their canonical IPv4 address. +/// +/// ### IPv4-Compatible IPv6 Addresses +/// +/// IPv4-compatible IPv6 addresses are defined in [IETF RFC 4291 Section 2.5.5.1], and have been officially deprecated. +/// The RFC describes the format of an "IPv4-Compatible IPv6 address" as follows: +/// +/// ```text +/// | 80 bits | 16 | 32 bits | +/// +--------------------------------------+--------------------------+ +/// |0000..............................0000|0000| IPv4 address | +/// +--------------------------------------+----+---------------------+ +/// ``` +/// So `::a.b.c.d` would be an IPv4-compatible IPv6 address representing the IPv4 address `a.b.c.d`. +/// +/// To convert from an IPv4 address to an IPv4-compatible IPv6 address, use [`Ipv4Addr::to_ipv6_compatible`]. +/// Use [`Ipv6Addr::to_ipv4`] to convert an IPv4-compatible IPv6 address to the canonical IPv4 address. +/// +/// [IETF RFC 4291 Section 2.5.5.1]: https://datatracker.ietf.org/doc/html/rfc4291#section-2.5.5.1 +/// +/// ### IPv4-Mapped IPv6 Addresses +/// +/// IPv4-mapped IPv6 addresses are defined in [IETF RFC 4291 Section 2.5.5.2]. +/// The RFC describes the format of an "IPv4-Mapped IPv6 address" as follows: +/// +/// ```text +/// | 80 bits | 16 | 32 bits | +/// +--------------------------------------+--------------------------+ +/// |0000..............................0000|FFFF| IPv4 address | +/// +--------------------------------------+----+---------------------+ +/// ``` +/// So `::ffff:a.b.c.d` would be an IPv4-mapped IPv6 address representing the IPv4 address `a.b.c.d`. +/// +/// To convert from an IPv4 address to an IPv4-mapped IPv6 address, use [`Ipv4Addr::to_ipv6_mapped`]. +/// Use [`Ipv6Addr::to_ipv4`] to convert an IPv4-mapped IPv6 address to the canonical IPv4 address. +/// +/// [IETF RFC 4291 Section 2.5.5.2]: https://datatracker.ietf.org/doc/html/rfc4291#section-2.5.5.2 +/// +/// # Textual representation +/// +/// `Ipv6Addr` provides a [`FromStr`] implementation. There are many ways to represent +/// an IPv6 address in text, but in general, each segments is written in hexadecimal +/// notation, and segments are separated by `:`. For more information, see +/// [IETF RFC 5952]. +/// +/// [`FromStr`]: core::str::FromStr +/// [IETF RFC 5952]: https://tools.ietf.org/html/rfc5952 +/// +/// # Examples +/// +/// ``` +/// use std::net::Ipv6Addr; +/// +/// let localhost = Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1); +/// assert_eq!("::1".parse(), Ok(localhost)); +/// assert_eq!(localhost.is_loopback(), true); +/// ``` +#[derive(Copy)] +#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] +pub struct Ipv6Addr { + pub(crate) inner: c::in6_addr, +} + +/// Scope of an [IPv6 multicast address] as defined in [IETF RFC 7346 section 2]. +/// +/// # Stability Guarantees +/// +/// Not all possible values for a multicast scope have been assigned. +/// Future RFCs may introduce new scopes, which will be added as variants to this enum; +/// because of this the enum is marked as `#[non_exhaustive]`. +/// +/// # Examples +/// ``` +/// #![feature(ip)] +/// +/// use std::net::Ipv6Addr; +/// use std::net::Ipv6MulticastScope::*; +/// +/// // An IPv6 multicast address with global scope (`ff0e::`). +/// let address = Ipv6Addr::new(0xff0e, 0, 0, 0, 0, 0, 0, 0); +/// +/// // Will print "Global scope". +/// match address.multicast_scope() { +/// Some(InterfaceLocal) => println!("Interface-Local scope"), +/// Some(LinkLocal) => println!("Link-Local scope"), +/// Some(RealmLocal) => println!("Realm-Local scope"), +/// Some(AdminLocal) => println!("Admin-Local scope"), +/// Some(SiteLocal) => println!("Site-Local scope"), +/// Some(OrganizationLocal) => println!("Organization-Local scope"), +/// Some(Global) => println!("Global scope"), +/// Some(_) => println!("Unknown scope"), +/// None => println!("Not a multicast address!") +/// } +/// +/// ``` +/// +/// [IPv6 multicast address]: Ipv6Addr +/// [IETF RFC 7346 section 2]: https://tools.ietf.org/html/rfc7346#section-2 +#[derive(Copy, PartialEq, Eq, Clone, Hash, Debug)] +#[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))] +#[non_exhaustive] +pub enum Ipv6MulticastScope { + /// Interface-Local scope. + InterfaceLocal, + /// Link-Local scope. + LinkLocal, + /// Realm-Local scope. + RealmLocal, + /// Admin-Local scope. + AdminLocal, + /// Site-Local scope. + SiteLocal, + /// Organization-Local scope. + OrganizationLocal, + /// Global scope. + Global, +} + +impl IpAddr { + /// Returns [`true`] for the special 'unspecified' address. + /// + /// See the documentation for [`Ipv4Addr::is_unspecified()`] and + /// [`Ipv6Addr::is_unspecified()`] for more details. + /// + /// # Examples + /// + /// ``` + /// use std::net::{IpAddr, Ipv4Addr, Ipv6Addr}; + /// + /// assert_eq!(IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0)).is_unspecified(), true); + /// assert_eq!(IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0)).is_unspecified(), true); + /// ``` + #[cfg_attr(staged_api, rustc_const_stable(feature = "const_ip", since = "1.50.0"))] + #[cfg_attr(staged_api, stable(feature = "ip_shared", since = "1.12.0"))] + #[must_use] + #[inline] + pub const fn is_unspecified(&self) -> bool { + match self { + IpAddr::V4(ip) => ip.is_unspecified(), + IpAddr::V6(ip) => ip.is_unspecified(), + } + } + + /// Returns [`true`] if this is a loopback address. + /// + /// See the documentation for [`Ipv4Addr::is_loopback()`] and + /// [`Ipv6Addr::is_loopback()`] for more details. + /// + /// # Examples + /// + /// ``` + /// use std::net::{IpAddr, Ipv4Addr, Ipv6Addr}; + /// + /// assert_eq!(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)).is_loopback(), true); + /// assert_eq!(IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0x1)).is_loopback(), true); + /// ``` + #[cfg_attr(staged_api, rustc_const_stable(feature = "const_ip", since = "1.50.0"))] + #[cfg_attr(staged_api, stable(feature = "ip_shared", since = "1.12.0"))] + #[must_use] + #[inline] + pub const fn is_loopback(&self) -> bool { + match self { + IpAddr::V4(ip) => ip.is_loopback(), + IpAddr::V6(ip) => ip.is_loopback(), + } + } + + /// Returns [`true`] if the address appears to be globally routable. + /// + /// See the documentation for [`Ipv4Addr::is_global()`] and + /// [`Ipv6Addr::is_global()`] for more details. + /// + /// # Examples + /// + /// ``` + /// #![feature(ip)] + /// + /// use std::net::{IpAddr, Ipv4Addr, Ipv6Addr}; + /// + /// assert_eq!(IpAddr::V4(Ipv4Addr::new(80, 9, 12, 3)).is_global(), true); + /// assert_eq!(IpAddr::V6(Ipv6Addr::new(0, 0, 0x1c9, 0, 0, 0xafc8, 0, 0x1)).is_global(), true); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_unstable(feature = "const_ip", issue = "76205") + )] + #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))] + #[must_use] + #[inline] + pub const fn is_global(&self) -> bool { + match self { + IpAddr::V4(ip) => ip.is_global(), + IpAddr::V6(ip) => ip.is_global(), + } + } + + /// Returns [`true`] if this is a multicast address. + /// + /// See the documentation for [`Ipv4Addr::is_multicast()`] and + /// [`Ipv6Addr::is_multicast()`] for more details. + /// + /// # Examples + /// + /// ``` + /// use std::net::{IpAddr, Ipv4Addr, Ipv6Addr}; + /// + /// assert_eq!(IpAddr::V4(Ipv4Addr::new(224, 254, 0, 0)).is_multicast(), true); + /// assert_eq!(IpAddr::V6(Ipv6Addr::new(0xff00, 0, 0, 0, 0, 0, 0, 0)).is_multicast(), true); + /// ``` + #[cfg_attr(staged_api, rustc_const_stable(feature = "const_ip", since = "1.50.0"))] + #[cfg_attr(staged_api, stable(feature = "ip_shared", since = "1.12.0"))] + #[must_use] + #[inline] + pub const fn is_multicast(&self) -> bool { + match self { + IpAddr::V4(ip) => ip.is_multicast(), + IpAddr::V6(ip) => ip.is_multicast(), + } + } + + /// Returns [`true`] if this address is in a range designated for documentation. + /// + /// See the documentation for [`Ipv4Addr::is_documentation()`] and + /// [`Ipv6Addr::is_documentation()`] for more details. + /// + /// # Examples + /// + /// ``` + /// #![feature(ip)] + /// + /// use std::net::{IpAddr, Ipv4Addr, Ipv6Addr}; + /// + /// assert_eq!(IpAddr::V4(Ipv4Addr::new(203, 0, 113, 6)).is_documentation(), true); + /// assert_eq!( + /// IpAddr::V6(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 0)).is_documentation(), + /// true + /// ); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_unstable(feature = "const_ip", issue = "76205") + )] + #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))] + #[must_use] + #[inline] + pub const fn is_documentation(&self) -> bool { + match self { + IpAddr::V4(ip) => ip.is_documentation(), + IpAddr::V6(ip) => ip.is_documentation(), + } + } + + /// Returns [`true`] if this address is in a range designated for benchmarking. + /// + /// See the documentation for [`Ipv4Addr::is_benchmarking()`] and + /// [`Ipv6Addr::is_benchmarking()`] for more details. + /// + /// # Examples + /// + /// ``` + /// #![feature(ip)] + /// + /// use std::net::{IpAddr, Ipv4Addr, Ipv6Addr}; + /// + /// assert_eq!(IpAddr::V4(Ipv4Addr::new(198, 19, 255, 255)).is_benchmarking(), true); + /// assert_eq!(IpAddr::V6(Ipv6Addr::new(0x2001, 0x2, 0, 0, 0, 0, 0, 0)).is_benchmarking(), true); + /// ``` + #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))] + #[must_use] + #[inline] + pub const fn is_benchmarking(&self) -> bool { + match self { + IpAddr::V4(ip) => ip.is_benchmarking(), + IpAddr::V6(ip) => ip.is_benchmarking(), + } + } + + /// Returns [`true`] if this address is an [`IPv4` address], and [`false`] + /// otherwise. + /// + /// [`IPv4` address]: IpAddr::V4 + /// + /// # Examples + /// + /// ``` + /// use std::net::{IpAddr, Ipv4Addr, Ipv6Addr}; + /// + /// assert_eq!(IpAddr::V4(Ipv4Addr::new(203, 0, 113, 6)).is_ipv4(), true); + /// assert_eq!(IpAddr::V6(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 0)).is_ipv4(), false); + /// ``` + #[cfg_attr(staged_api, rustc_const_stable(feature = "const_ip", since = "1.50.0"))] + #[cfg_attr(staged_api, stable(feature = "ipaddr_checker", since = "1.16.0"))] + #[must_use] + #[inline] + pub const fn is_ipv4(&self) -> bool { + matches!(self, IpAddr::V4(_)) + } + + /// Returns [`true`] if this address is an [`IPv6` address], and [`false`] + /// otherwise. + /// + /// [`IPv6` address]: IpAddr::V6 + /// + /// # Examples + /// + /// ``` + /// use std::net::{IpAddr, Ipv4Addr, Ipv6Addr}; + /// + /// assert_eq!(IpAddr::V4(Ipv4Addr::new(203, 0, 113, 6)).is_ipv6(), false); + /// assert_eq!(IpAddr::V6(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 0)).is_ipv6(), true); + /// ``` + #[cfg_attr(staged_api, rustc_const_stable(feature = "const_ip", since = "1.50.0"))] + #[cfg_attr(staged_api, stable(feature = "ipaddr_checker", since = "1.16.0"))] + #[must_use] + #[inline] + pub const fn is_ipv6(&self) -> bool { + matches!(self, IpAddr::V6(_)) + } + + /// Converts this address to an `IpAddr::V4` if it is an IPv4-mapped IPv6 addresses, otherwise it + /// return `self` as-is. + /// + /// # Examples + /// + /// ``` + /// #![feature(ip)] + /// use std::net::{IpAddr, Ipv4Addr, Ipv6Addr}; + /// + /// assert_eq!(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)).to_canonical().is_loopback(), true); + /// assert_eq!(IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0x7f00, 0x1)).is_loopback(), false); + /// assert_eq!(IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0x7f00, 0x1)).to_canonical().is_loopback(), true); + /// ``` + #[inline] + #[must_use = "this returns the result of the operation, \ + without modifying the original"] + #[cfg_attr( + staged_api, + rustc_const_unstable(feature = "const_ip", issue = "76205") + )] + #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))] + pub const fn to_canonical(&self) -> IpAddr { + match self { + &v4 @ IpAddr::V4(_) => v4, + IpAddr::V6(v6) => v6.to_canonical(), + } + } +} + +impl Ipv4Addr { + /// Creates a new IPv4 address from four eight-bit octets. + /// + /// The result will represent the IP address `a`.`b`.`c`.`d`. + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv4Addr; + /// + /// let addr = Ipv4Addr::new(127, 0, 0, 1); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_stable(feature = "const_ipv4", since = "1.32.0") + )] + #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] + #[must_use] + #[inline] + pub const fn new(a: u8, b: u8, c: u8, d: u8) -> Ipv4Addr { + // `s_addr` is stored as BE on all machine and the array is in BE order. + // So the native endian conversion method is used so that it's never swapped. + Ipv4Addr { + inner: in_addr_new(u32::from_ne_bytes([a, b, c, d])), + } + } + + /// An IPv4 address with the address pointing to localhost: `127.0.0.1` + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv4Addr; + /// + /// let addr = Ipv4Addr::LOCALHOST; + /// assert_eq!(addr, Ipv4Addr::new(127, 0, 0, 1)); + /// ``` + #[cfg_attr(staged_api, stable(feature = "ip_constructors", since = "1.30.0"))] + pub const LOCALHOST: Self = Ipv4Addr::new(127, 0, 0, 1); + + /// An IPv4 address representing an unspecified address: `0.0.0.0` + /// + /// This corresponds to the constant `INADDR_ANY` in other languages. + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv4Addr; + /// + /// let addr = Ipv4Addr::UNSPECIFIED; + /// assert_eq!(addr, Ipv4Addr::new(0, 0, 0, 0)); + /// ``` + #[doc(alias = "INADDR_ANY")] + #[cfg_attr(staged_api, stable(feature = "ip_constructors", since = "1.30.0"))] + pub const UNSPECIFIED: Self = Ipv4Addr::new(0, 0, 0, 0); + + /// An IPv4 address representing the broadcast address: `255.255.255.255` + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv4Addr; + /// + /// let addr = Ipv4Addr::BROADCAST; + /// assert_eq!(addr, Ipv4Addr::new(255, 255, 255, 255)); + /// ``` + #[cfg_attr(staged_api, stable(feature = "ip_constructors", since = "1.30.0"))] + pub const BROADCAST: Self = Ipv4Addr::new(255, 255, 255, 255); + + /// Returns the four eight-bit integers that make up this address. + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv4Addr; + /// + /// let addr = Ipv4Addr::new(127, 0, 0, 1); + /// assert_eq!(addr.octets(), [127, 0, 0, 1]); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_stable(feature = "const_ipv4", since = "1.50.0") + )] + #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] + #[must_use] + #[inline] + pub const fn octets(&self) -> [u8; 4] { + // This returns the order we want because s_addr is stored in big-endian. + in_addr_s_addr(self.inner).to_ne_bytes() + } + + /// Returns [`true`] for the special 'unspecified' address (`0.0.0.0`). + /// + /// This property is defined in _UNIX Network Programming, Second Edition_, + /// W. Richard Stevens, p. 891; see also [ip7]. + /// + /// [ip7]: https://man7.org/linux/man-pages/man7/ip.7.html + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv4Addr; + /// + /// assert_eq!(Ipv4Addr::new(0, 0, 0, 0).is_unspecified(), true); + /// assert_eq!(Ipv4Addr::new(45, 22, 13, 197).is_unspecified(), false); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_stable(feature = "const_ipv4", since = "1.32.0") + )] + #[cfg_attr(staged_api, stable(feature = "ip_shared", since = "1.12.0"))] + #[must_use] + #[inline] + pub const fn is_unspecified(&self) -> bool { + in_addr_s_addr(self.inner) == 0 + } + + /// Returns [`true`] if this is a loopback address (`127.0.0.0/8`). + /// + /// This property is defined by [IETF RFC 1122]. + /// + /// [IETF RFC 1122]: https://tools.ietf.org/html/rfc1122 + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv4Addr; + /// + /// assert_eq!(Ipv4Addr::new(127, 0, 0, 1).is_loopback(), true); + /// assert_eq!(Ipv4Addr::new(45, 22, 13, 197).is_loopback(), false); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_stable(feature = "const_ipv4", since = "1.50.0") + )] + #[cfg_attr(staged_api, stable(since = "1.7.0", feature = "ip_17"))] + #[must_use] + #[inline] + pub const fn is_loopback(&self) -> bool { + self.octets()[0] == 127 + } + + /// Returns [`true`] if this is a private address. + /// + /// The private address ranges are defined in [IETF RFC 1918] and include: + /// + /// - `10.0.0.0/8` + /// - `172.16.0.0/12` + /// - `192.168.0.0/16` + /// + /// [IETF RFC 1918]: https://tools.ietf.org/html/rfc1918 + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv4Addr; + /// + /// assert_eq!(Ipv4Addr::new(10, 0, 0, 1).is_private(), true); + /// assert_eq!(Ipv4Addr::new(10, 10, 10, 10).is_private(), true); + /// assert_eq!(Ipv4Addr::new(172, 16, 10, 10).is_private(), true); + /// assert_eq!(Ipv4Addr::new(172, 29, 45, 14).is_private(), true); + /// assert_eq!(Ipv4Addr::new(172, 32, 0, 2).is_private(), false); + /// assert_eq!(Ipv4Addr::new(192, 168, 0, 2).is_private(), true); + /// assert_eq!(Ipv4Addr::new(192, 169, 0, 2).is_private(), false); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_stable(feature = "const_ipv4", since = "1.50.0") + )] + #[cfg_attr(staged_api, stable(since = "1.7.0", feature = "ip_17"))] + #[must_use] + #[inline] + pub const fn is_private(&self) -> bool { + match self.octets() { + [10, ..] => true, + [172, b, ..] if b >= 16 && b <= 31 => true, + [192, 168, ..] => true, + _ => false, + } + } + + /// Returns [`true`] if the address is link-local (`169.254.0.0/16`). + /// + /// This property is defined by [IETF RFC 3927]. + /// + /// [IETF RFC 3927]: https://tools.ietf.org/html/rfc3927 + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv4Addr; + /// + /// assert_eq!(Ipv4Addr::new(169, 254, 0, 0).is_link_local(), true); + /// assert_eq!(Ipv4Addr::new(169, 254, 10, 65).is_link_local(), true); + /// assert_eq!(Ipv4Addr::new(16, 89, 10, 65).is_link_local(), false); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_stable(feature = "const_ipv4", since = "1.50.0") + )] + #[cfg_attr(staged_api, stable(since = "1.7.0", feature = "ip_17"))] + #[must_use] + #[inline] + pub const fn is_link_local(&self) -> bool { + matches!(self.octets(), [169, 254, ..]) + } + + /// Returns [`true`] if the address appears to be globally routable. + /// See [iana-ipv4-special-registry][ipv4-sr]. + /// + /// The following return [`false`]: + /// + /// - private addresses (see [`Ipv4Addr::is_private()`]) + /// - the loopback address (see [`Ipv4Addr::is_loopback()`]) + /// - the link-local address (see [`Ipv4Addr::is_link_local()`]) + /// - the broadcast address (see [`Ipv4Addr::is_broadcast()`]) + /// - addresses used for documentation (see [`Ipv4Addr::is_documentation()`]) + /// - the unspecified address (see [`Ipv4Addr::is_unspecified()`]), and the whole + /// `0.0.0.0/8` block + /// - addresses reserved for future protocols, except + /// `192.0.0.9/32` and `192.0.0.10/32` which are globally routable + /// - addresses reserved for future use (see [`Ipv4Addr::is_reserved()`] + /// - addresses reserved for networking devices benchmarking (see + /// [`Ipv4Addr::is_benchmarking()`]) + /// + /// [ipv4-sr]: https://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml + /// + /// # Examples + /// + /// ``` + /// #![feature(ip)] + /// + /// use std::net::Ipv4Addr; + /// + /// // private addresses are not global + /// assert_eq!(Ipv4Addr::new(10, 254, 0, 0).is_global(), false); + /// assert_eq!(Ipv4Addr::new(192, 168, 10, 65).is_global(), false); + /// assert_eq!(Ipv4Addr::new(172, 16, 10, 65).is_global(), false); + /// + /// // the 0.0.0.0/8 block is not global + /// assert_eq!(Ipv4Addr::new(0, 1, 2, 3).is_global(), false); + /// // in particular, the unspecified address is not global + /// assert_eq!(Ipv4Addr::new(0, 0, 0, 0).is_global(), false); + /// + /// // the loopback address is not global + /// assert_eq!(Ipv4Addr::new(127, 0, 0, 1).is_global(), false); + /// + /// // link local addresses are not global + /// assert_eq!(Ipv4Addr::new(169, 254, 45, 1).is_global(), false); + /// + /// // the broadcast address is not global + /// assert_eq!(Ipv4Addr::new(255, 255, 255, 255).is_global(), false); + /// + /// // the address space designated for documentation is not global + /// assert_eq!(Ipv4Addr::new(192, 0, 2, 255).is_global(), false); + /// assert_eq!(Ipv4Addr::new(198, 51, 100, 65).is_global(), false); + /// assert_eq!(Ipv4Addr::new(203, 0, 113, 6).is_global(), false); + /// + /// // shared addresses are not global + /// assert_eq!(Ipv4Addr::new(100, 100, 0, 0).is_global(), false); + /// + /// // addresses reserved for protocol assignment are not global + /// assert_eq!(Ipv4Addr::new(192, 0, 0, 0).is_global(), false); + /// assert_eq!(Ipv4Addr::new(192, 0, 0, 255).is_global(), false); + /// + /// // addresses reserved for future use are not global + /// assert_eq!(Ipv4Addr::new(250, 10, 20, 30).is_global(), false); + /// + /// // addresses reserved for network devices benchmarking are not global + /// assert_eq!(Ipv4Addr::new(198, 18, 0, 0).is_global(), false); + /// + /// // All the other addresses are global + /// assert_eq!(Ipv4Addr::new(1, 1, 1, 1).is_global(), true); + /// assert_eq!(Ipv4Addr::new(80, 9, 12, 3).is_global(), true); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_unstable(feature = "const_ipv4", issue = "76205") + )] + #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))] + #[must_use] + #[inline] + pub const fn is_global(&self) -> bool { + // check if this address is 192.0.0.9 or 192.0.0.10. These addresses are the only two + // globally routable addresses in the 192.0.0.0/24 range. + if u32::from_be_bytes(self.octets()) == 0xc0000009 + || u32::from_be_bytes(self.octets()) == 0xc000000a + { + return true; + } + !self.is_private() + && !self.is_loopback() + && !self.is_link_local() + && !self.is_broadcast() + && !self.is_documentation() + && !self.is_shared() + // addresses reserved for future protocols (`192.0.0.0/24`) + && !(self.octets()[0] == 192 && self.octets()[1] == 0 && self.octets()[2] == 0) + && !self.is_reserved() + && !self.is_benchmarking() + // Make sure the address is not in 0.0.0.0/8 + && self.octets()[0] != 0 + } + + /// Returns [`true`] if this address is part of the Shared Address Space defined in + /// [IETF RFC 6598] (`100.64.0.0/10`). + /// + /// [IETF RFC 6598]: https://tools.ietf.org/html/rfc6598 + /// + /// # Examples + /// + /// ``` + /// #![feature(ip)] + /// use std::net::Ipv4Addr; + /// + /// assert_eq!(Ipv4Addr::new(100, 64, 0, 0).is_shared(), true); + /// assert_eq!(Ipv4Addr::new(100, 127, 255, 255).is_shared(), true); + /// assert_eq!(Ipv4Addr::new(100, 128, 0, 0).is_shared(), false); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_unstable(feature = "const_ipv4", issue = "76205") + )] + #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))] + #[must_use] + #[inline] + pub const fn is_shared(&self) -> bool { + self.octets()[0] == 100 && (self.octets()[1] & 0b1100_0000 == 0b0100_0000) + } + + /// Returns [`true`] if this address part of the `198.18.0.0/15` range, which is reserved for + /// network devices benchmarking. This range is defined in [IETF RFC 2544] as `192.18.0.0` + /// through `198.19.255.255` but [errata 423] corrects it to `198.18.0.0/15`. + /// + /// [IETF RFC 2544]: https://tools.ietf.org/html/rfc2544 + /// [errata 423]: https://www.rfc-editor.org/errata/eid423 + /// + /// # Examples + /// + /// ``` + /// #![feature(ip)] + /// use std::net::Ipv4Addr; + /// + /// assert_eq!(Ipv4Addr::new(198, 17, 255, 255).is_benchmarking(), false); + /// assert_eq!(Ipv4Addr::new(198, 18, 0, 0).is_benchmarking(), true); + /// assert_eq!(Ipv4Addr::new(198, 19, 255, 255).is_benchmarking(), true); + /// assert_eq!(Ipv4Addr::new(198, 20, 0, 0).is_benchmarking(), false); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_unstable(feature = "const_ipv4", issue = "76205") + )] + #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))] + #[must_use] + #[inline] + pub const fn is_benchmarking(&self) -> bool { + self.octets()[0] == 198 && (self.octets()[1] & 0xfe) == 18 + } + + /// Returns [`true`] if this address is reserved by IANA for future use. [IETF RFC 1112] + /// defines the block of reserved addresses as `240.0.0.0/4`. This range normally includes the + /// broadcast address `255.255.255.255`, but this implementation explicitly excludes it, since + /// it is obviously not reserved for future use. + /// + /// [IETF RFC 1112]: https://tools.ietf.org/html/rfc1112 + /// + /// # Warning + /// + /// As IANA assigns new addresses, this method will be + /// updated. This may result in non-reserved addresses being + /// treated as reserved in code that relies on an outdated version + /// of this method. + /// + /// # Examples + /// + /// ``` + /// #![feature(ip)] + /// use std::net::Ipv4Addr; + /// + /// assert_eq!(Ipv4Addr::new(240, 0, 0, 0).is_reserved(), true); + /// assert_eq!(Ipv4Addr::new(255, 255, 255, 254).is_reserved(), true); + /// + /// assert_eq!(Ipv4Addr::new(239, 255, 255, 255).is_reserved(), false); + /// // The broadcast address is not considered as reserved for future use by this implementation + /// assert_eq!(Ipv4Addr::new(255, 255, 255, 255).is_reserved(), false); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_unstable(feature = "const_ipv4", issue = "76205") + )] + #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))] + #[must_use] + #[inline] + pub const fn is_reserved(&self) -> bool { + self.octets()[0] & 240 == 240 && !self.is_broadcast() + } + + /// Returns [`true`] if this is a multicast address (`224.0.0.0/4`). + /// + /// Multicast addresses have a most significant octet between `224` and `239`, + /// and is defined by [IETF RFC 5771]. + /// + /// [IETF RFC 5771]: https://tools.ietf.org/html/rfc5771 + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv4Addr; + /// + /// assert_eq!(Ipv4Addr::new(224, 254, 0, 0).is_multicast(), true); + /// assert_eq!(Ipv4Addr::new(236, 168, 10, 65).is_multicast(), true); + /// assert_eq!(Ipv4Addr::new(172, 16, 10, 65).is_multicast(), false); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_stable(feature = "const_ipv4", since = "1.50.0") + )] + #[cfg_attr(staged_api, stable(since = "1.7.0", feature = "ip_17"))] + #[must_use] + #[inline] + pub const fn is_multicast(&self) -> bool { + self.octets()[0] >= 224 && self.octets()[0] <= 239 + } + + /// Returns [`true`] if this is a broadcast address (`255.255.255.255`). + /// + /// A broadcast address has all octets set to `255` as defined in [IETF RFC 919]. + /// + /// [IETF RFC 919]: https://tools.ietf.org/html/rfc919 + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv4Addr; + /// + /// assert_eq!(Ipv4Addr::new(255, 255, 255, 255).is_broadcast(), true); + /// assert_eq!(Ipv4Addr::new(236, 168, 10, 65).is_broadcast(), false); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_stable(feature = "const_ipv4", since = "1.50.0") + )] + #[cfg_attr(staged_api, stable(since = "1.7.0", feature = "ip_17"))] + #[must_use] + #[inline] + pub const fn is_broadcast(&self) -> bool { + u32::from_be_bytes(self.octets()) == u32::from_be_bytes(Self::BROADCAST.octets()) + } + + /// Returns [`true`] if this address is in a range designated for documentation. + /// + /// This is defined in [IETF RFC 5737]: + /// + /// - `192.0.2.0/24` (TEST-NET-1) + /// - `198.51.100.0/24` (TEST-NET-2) + /// - `203.0.113.0/24` (TEST-NET-3) + /// + /// [IETF RFC 5737]: https://tools.ietf.org/html/rfc5737 + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv4Addr; + /// + /// assert_eq!(Ipv4Addr::new(192, 0, 2, 255).is_documentation(), true); + /// assert_eq!(Ipv4Addr::new(198, 51, 100, 65).is_documentation(), true); + /// assert_eq!(Ipv4Addr::new(203, 0, 113, 6).is_documentation(), true); + /// assert_eq!(Ipv4Addr::new(193, 34, 17, 19).is_documentation(), false); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_stable(feature = "const_ipv4", since = "1.50.0") + )] + #[cfg_attr(staged_api, stable(since = "1.7.0", feature = "ip_17"))] + #[must_use] + #[inline] + pub const fn is_documentation(&self) -> bool { + match self.octets() { + [192, 0, 2, _] => true, + [198, 51, 100, _] => true, + [203, 0, 113, _] => true, + _ => false, + } + } + + /// Converts this address to an [IPv4-compatible] [`IPv6` address]. + /// + /// `a.b.c.d` becomes `::a.b.c.d` + /// + /// Note that IPv4-compatible addresses have been officially deprecated. + /// If you don't explicitly need an IPv4-compatible address for legacy reasons, consider using `to_ipv6_mapped` instead. + /// + /// [IPv4-compatible]: Ipv6Addr#ipv4-compatible-ipv6-addresses + /// [`IPv6` address]: Ipv6Addr + /// + /// # Examples + /// + /// ``` + /// use std::net::{Ipv4Addr, Ipv6Addr}; + /// + /// assert_eq!( + /// Ipv4Addr::new(192, 0, 2, 255).to_ipv6_compatible(), + /// Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0xc000, 0x2ff) + /// ); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_stable(feature = "const_ipv4", since = "1.50.0") + )] + #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] + #[must_use = "this returns the result of the operation, \ + without modifying the original"] + #[inline] + pub const fn to_ipv6_compatible(&self) -> Ipv6Addr { + let [a, b, c, d] = self.octets(); + Ipv6Addr { + inner: in6_addr_new([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, a, b, c, d]), + } + } + + /// Converts this address to an [IPv4-mapped] [`IPv6` address]. + /// + /// `a.b.c.d` becomes `::ffff:a.b.c.d` + /// + /// [IPv4-mapped]: Ipv6Addr#ipv4-mapped-ipv6-addresses + /// [`IPv6` address]: Ipv6Addr + /// + /// # Examples + /// + /// ``` + /// use std::net::{Ipv4Addr, Ipv6Addr}; + /// + /// assert_eq!(Ipv4Addr::new(192, 0, 2, 255).to_ipv6_mapped(), + /// Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc000, 0x2ff)); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_stable(feature = "const_ipv4", since = "1.50.0") + )] + #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] + #[must_use = "this returns the result of the operation, \ + without modifying the original"] + #[inline] + pub const fn to_ipv6_mapped(&self) -> Ipv6Addr { + let [a, b, c, d] = self.octets(); + Ipv6Addr { + inner: in6_addr_new([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF, a, b, c, d]), + } + } +} + +#[cfg_attr(staged_api, stable(feature = "ip_from_ip", since = "1.16.0"))] +impl From<Ipv4Addr> for IpAddr { + /// Copies this address to a new `IpAddr::V4`. + /// + /// # Examples + /// + /// ``` + /// use std::net::{IpAddr, Ipv4Addr}; + /// + /// let addr = Ipv4Addr::new(127, 0, 0, 1); + /// + /// assert_eq!( + /// IpAddr::V4(addr), + /// IpAddr::from(addr) + /// ) + /// ``` + #[inline] + fn from(ipv4: Ipv4Addr) -> IpAddr { + IpAddr::V4(ipv4) + } +} + +#[cfg_attr(staged_api, stable(feature = "ip_from_ip", since = "1.16.0"))] +impl From<Ipv6Addr> for IpAddr { + /// Copies this address to a new `IpAddr::V6`. + /// + /// # Examples + /// + /// ``` + /// use std::net::{IpAddr, Ipv6Addr}; + /// + /// let addr = Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff); + /// + /// assert_eq!( + /// IpAddr::V6(addr), + /// IpAddr::from(addr) + /// ); + /// ``` + #[inline] + fn from(ipv6: Ipv6Addr) -> IpAddr { + IpAddr::V6(ipv6) + } +} + +#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] +impl Clone for Ipv4Addr { + #[inline] + fn clone(&self) -> Ipv4Addr { + *self + } +} + +#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] +impl PartialEq for Ipv4Addr { + #[inline] + fn eq(&self, other: &Ipv4Addr) -> bool { + in_addr_s_addr(self.inner) == in_addr_s_addr(other.inner) + } +} + +#[cfg_attr(staged_api, stable(feature = "ip_cmp", since = "1.16.0"))] +impl PartialEq<Ipv4Addr> for IpAddr { + #[inline] + fn eq(&self, other: &Ipv4Addr) -> bool { + match self { + IpAddr::V4(v4) => v4 == other, + IpAddr::V6(_) => false, + } + } +} + +#[cfg_attr(staged_api, stable(feature = "ip_cmp", since = "1.16.0"))] +impl PartialEq<IpAddr> for Ipv4Addr { + #[inline] + fn eq(&self, other: &IpAddr) -> bool { + match other { + IpAddr::V4(v4) => self == v4, + IpAddr::V6(_) => false, + } + } +} + +#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] +impl Eq for Ipv4Addr {} + +#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] +impl hash::Hash for Ipv4Addr { + #[inline] + fn hash<H: hash::Hasher>(&self, s: &mut H) { + // NOTE: + // * hash in big endian order + // * in netbsd, `in_addr` has `repr(packed)`, we need to + // copy `s_addr` to avoid unsafe borrowing + { in_addr_s_addr(self.inner) }.hash(s) + } +} + +#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] +impl PartialOrd for Ipv4Addr { + #[inline] + fn partial_cmp(&self, other: &Ipv4Addr) -> Option<Ordering> { + Some(self.cmp(other)) + } +} + +#[cfg_attr(staged_api, stable(feature = "ip_cmp", since = "1.16.0"))] +impl PartialOrd<Ipv4Addr> for IpAddr { + #[inline] + fn partial_cmp(&self, other: &Ipv4Addr) -> Option<Ordering> { + match self { + IpAddr::V4(v4) => v4.partial_cmp(other), + IpAddr::V6(_) => Some(Ordering::Greater), + } + } +} + +#[cfg_attr(staged_api, stable(feature = "ip_cmp", since = "1.16.0"))] +impl PartialOrd<IpAddr> for Ipv4Addr { + #[inline] + fn partial_cmp(&self, other: &IpAddr) -> Option<Ordering> { + match other { + IpAddr::V4(v4) => self.partial_cmp(v4), + IpAddr::V6(_) => Some(Ordering::Less), + } + } +} + +#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] +impl Ord for Ipv4Addr { + #[inline] + fn cmp(&self, other: &Ipv4Addr) -> Ordering { + // Compare as native endian + u32::from_be(in_addr_s_addr(self.inner)).cmp(&u32::from_be(in_addr_s_addr(other.inner))) + } +} + +#[cfg_attr(staged_api, stable(feature = "ip_u32", since = "1.1.0"))] +impl From<Ipv4Addr> for u32 { + /// Converts an `Ipv4Addr` into a host byte order `u32`. + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv4Addr; + /// + /// let addr = Ipv4Addr::new(0xca, 0xfe, 0xba, 0xbe); + /// assert_eq!(0xcafebabe, u32::from(addr)); + /// ``` + #[inline] + fn from(ip: Ipv4Addr) -> u32 { + let ip = ip.octets(); + u32::from_be_bytes(ip) + } +} + +#[cfg_attr(staged_api, stable(feature = "ip_u32", since = "1.1.0"))] +impl From<u32> for Ipv4Addr { + /// Converts a host byte order `u32` into an `Ipv4Addr`. + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv4Addr; + /// + /// let addr = Ipv4Addr::from(0xcafebabe); + /// assert_eq!(Ipv4Addr::new(0xca, 0xfe, 0xba, 0xbe), addr); + /// ``` + #[inline] + fn from(ip: u32) -> Ipv4Addr { + Ipv4Addr::from(ip.to_be_bytes()) + } +} + +#[cfg_attr(staged_api, stable(feature = "from_slice_v4", since = "1.9.0"))] +impl From<[u8; 4]> for Ipv4Addr { + /// Creates an `Ipv4Addr` from a four element byte array. + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv4Addr; + /// + /// let addr = Ipv4Addr::from([13u8, 12u8, 11u8, 10u8]); + /// assert_eq!(Ipv4Addr::new(13, 12, 11, 10), addr); + /// ``` + #[inline] + fn from(octets: [u8; 4]) -> Ipv4Addr { + Ipv4Addr::new(octets[0], octets[1], octets[2], octets[3]) + } +} + +#[cfg_attr(staged_api, stable(feature = "ip_from_slice", since = "1.17.0"))] +impl From<[u8; 4]> for IpAddr { + /// Creates an `IpAddr::V4` from a four element byte array. + /// + /// # Examples + /// + /// ``` + /// use std::net::{IpAddr, Ipv4Addr}; + /// + /// let addr = IpAddr::from([13u8, 12u8, 11u8, 10u8]); + /// assert_eq!(IpAddr::V4(Ipv4Addr::new(13, 12, 11, 10)), addr); + /// ``` + #[inline] + fn from(octets: [u8; 4]) -> IpAddr { + IpAddr::V4(Ipv4Addr::from(octets)) + } +} + +impl Ipv6Addr { + /// Creates a new IPv6 address from eight 16-bit segments. + /// + /// The result will represent the IP address `a:b:c:d:e:f:g:h`. + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv6Addr; + /// + /// let addr = Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_stable(feature = "const_ipv6", since = "1.32.0") + )] + #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] + #[must_use] + #[inline] + pub const fn new(a: u16, b: u16, c: u16, d: u16, e: u16, f: u16, g: u16, h: u16) -> Ipv6Addr { + let addr16 = [ + a.to_be(), + b.to_be(), + c.to_be(), + d.to_be(), + e.to_be(), + f.to_be(), + g.to_be(), + h.to_be(), + ]; + Ipv6Addr { + // All elements in `addr16` are big endian. + // SAFETY: `[u16; 8]` is always safe to transmute to `[u8; 16]`. + // rustc_allow_const_fn_unstable: the transmute could be written as stable const + // code, but that leads to worse code generation (#75085) + inner: in6_addr_new(unsafe { transmute::<_, [u8; 16]>(addr16) }), + } + } + + /// An IPv6 address representing localhost: `::1`. + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv6Addr; + /// + /// let addr = Ipv6Addr::LOCALHOST; + /// assert_eq!(addr, Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1)); + /// ``` + #[cfg_attr(staged_api, stable(feature = "ip_constructors", since = "1.30.0"))] + pub const LOCALHOST: Self = Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1); + + /// An IPv6 address representing the unspecified address: `::` + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv6Addr; + /// + /// let addr = Ipv6Addr::UNSPECIFIED; + /// assert_eq!(addr, Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0)); + /// ``` + #[cfg_attr(staged_api, stable(feature = "ip_constructors", since = "1.30.0"))] + pub const UNSPECIFIED: Self = Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0); + + /// 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]); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_stable(feature = "const_ipv6", since = "1.50.0") + )] + #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] + #[must_use] + #[inline] + pub const fn segments(&self) -> [u16; 8] { + // All elements in `s6_addr` must be big endian. + // SAFETY: `[u8; 16]` is always safe to transmute to `[u16; 8]`. + // rustc_allow_const_fn_unstable: the transmute could be written as stable const code, but + // that leads to worse code generation (#75085) + let [a, b, c, d, e, f, g, h] = + unsafe { transmute::<_, [u16; 8]>(in6_addr_s6_addr(self.inner)) }; + // We want native endian u16 + [ + u16::from_be(a), + u16::from_be(b), + u16::from_be(c), + u16::from_be(d), + u16::from_be(e), + u16::from_be(f), + u16::from_be(g), + u16::from_be(h), + ] + } + + /// Returns [`true`] for the special 'unspecified' address (`::`). + /// + /// This property is defined in [IETF RFC 4291]. + /// + /// [IETF RFC 4291]: https://tools.ietf.org/html/rfc4291 + /// + /// # 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); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_stable(feature = "const_ipv6", since = "1.50.0") + )] + #[cfg_attr(staged_api, stable(since = "1.7.0", feature = "ip_17"))] + #[must_use] + #[inline] + pub const fn is_unspecified(&self) -> bool { + u128::from_be_bytes(self.octets()) == u128::from_be_bytes(Ipv6Addr::UNSPECIFIED.octets()) + } + + /// 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. + /// + /// [loopback address]: Ipv6Addr::LOCALHOST + /// [IETF RFC 4291 section 2.5.3]: https://tools.ietf.org/html/rfc4291#section-2.5.3 + /// + /// # 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); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_stable(feature = "const_ipv6", since = "1.50.0") + )] + #[cfg_attr(staged_api, stable(since = "1.7.0", feature = "ip_17"))] + #[must_use] + #[inline] + pub const fn is_loopback(&self) -> bool { + u128::from_be_bytes(self.octets()) == u128::from_be_bytes(Ipv6Addr::LOCALHOST.octets()) + } + + /// Returns [`true`] if the address appears to be globally routable. + /// + /// The following return [`false`]: + /// + /// - the loopback address + /// - link-local and unique local unicast addresses + /// - interface-, link-, realm-, admin- and site-local multicast addresses + /// + /// # Examples + /// + /// ``` + /// #![feature(ip)] + /// + /// use std::net::Ipv6Addr; + /// + /// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_global(), true); + /// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0x1).is_global(), false); + /// assert_eq!(Ipv6Addr::new(0, 0, 0x1c9, 0, 0, 0xafc8, 0, 0x1).is_global(), true); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_unstable(feature = "const_ipv6", issue = "76205") + )] + #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))] + #[must_use] + #[inline] + pub const fn is_global(&self) -> bool { + match self.multicast_scope() { + Some(Ipv6MulticastScope::Global) => true, + None => self.is_unicast_global(), + _ => false, + } + } + + /// Returns [`true`] if this is a unique local address (`fc00::/7`). + /// + /// This property is defined in [IETF RFC 4193]. + /// + /// [IETF RFC 4193]: https://tools.ietf.org/html/rfc4193 + /// + /// # Examples + /// + /// ``` + /// #![feature(ip)] + /// + /// 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); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_unstable(feature = "const_ipv6", issue = "76205") + )] + #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))] + #[must_use] + #[inline] + pub const fn is_unique_local(&self) -> bool { + (self.segments()[0] & 0xfe00) == 0xfc00 + } + + /// 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. + /// + /// [IETF RFC 4291]: https://tools.ietf.org/html/rfc4291 + /// [multicast address]: Ipv6Addr::is_multicast + /// + /// # 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); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_unstable(feature = "const_ipv6", issue = "76205") + )] + #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))] + #[must_use] + #[inline] + pub const fn is_unicast(&self) -> bool { + !self.is_multicast() + } + + /// 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: + /// + /// ```text + /// | 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. + /// + /// [RFC 4291]: https://tools.ietf.org/html/rfc4291 + /// [RFC 4291 section 2.4]: https://tools.ietf.org/html/rfc4291#section-2.4 + /// [RFC 4291 section 2.5.3]: https://tools.ietf.org/html/rfc4291#section-2.5.3 + /// [RFC 4291 section 2.5.6]: https://tools.ietf.org/html/rfc4291#section-2.5.6 + /// [loopback address]: Ipv6Addr::LOCALHOST + /// + /// # Examples + /// + /// ``` + /// #![feature(ip)] + /// + /// 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); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_unstable(feature = "const_ipv6", issue = "76205") + )] + #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))] + #[must_use] + #[inline] + pub const fn is_unicast_link_local(&self) -> bool { + (self.segments()[0] & 0xffc0) == 0xfe80 + } + + /// Returns [`true`] if this is an address reserved for documentation + /// (`2001:db8::/32`). + /// + /// This property is defined in [IETF RFC 3849]. + /// + /// [IETF RFC 3849]: https://tools.ietf.org/html/rfc3849 + /// + /// # 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); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_unstable(feature = "const_ipv6", issue = "76205") + )] + #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))] + #[must_use] + #[inline] + pub const fn is_documentation(&self) -> bool { + (self.segments()[0] == 0x2001) && (self.segments()[1] == 0xdb8) + } + + /// 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`. + /// + /// [IETF RFC 5180]: https://tools.ietf.org/html/rfc5180 + /// [IETF RFC Errata 1752]: https://www.rfc-editor.org/errata_search.php?eid=1752 + /// + /// ``` + /// #![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); + /// ``` + #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))] + #[must_use] + #[inline] + pub const fn is_benchmarking(&self) -> bool { + (self.segments()[0] == 0x2001) && (self.segments()[1] == 0x2) && (self.segments()[2] == 0) + } + + /// 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] + /// + /// ```no_rust + /// 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). + /// ``` + /// + /// [RFC 4291 section 2.5.7]: https://tools.ietf.org/html/rfc4291#section-2.5.7 + /// + /// # 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); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_unstable(feature = "const_ipv6", issue = "76205") + )] + #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))] + #[must_use] + #[inline] + pub const fn is_unicast_global(&self) -> bool { + self.is_unicast() + && !self.is_loopback() + && !self.is_unicast_link_local() + && !self.is_unique_local() + && !self.is_unspecified() + && !self.is_documentation() + } + + /// 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); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_unstable(feature = "const_ipv6", issue = "76205") + )] + #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))] + #[must_use] + #[inline] + pub const fn multicast_scope(&self) -> Option<Ipv6MulticastScope> { + if self.is_multicast() { + match self.segments()[0] & 0x000f { + 1 => Some(Ipv6MulticastScope::InterfaceLocal), + 2 => Some(Ipv6MulticastScope::LinkLocal), + 3 => Some(Ipv6MulticastScope::RealmLocal), + 4 => Some(Ipv6MulticastScope::AdminLocal), + 5 => Some(Ipv6MulticastScope::SiteLocal), + 8 => Some(Ipv6MulticastScope::OrganizationLocal), + 14 => Some(Ipv6MulticastScope::Global), + _ => None, + } + } else { + None + } + } + + /// Returns [`true`] if this is a multicast address (`ff00::/8`). + /// + /// This property is defined by [IETF RFC 4291]. + /// + /// [IETF RFC 4291]: https://tools.ietf.org/html/rfc4291 + /// + /// # 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); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_stable(feature = "const_ipv6", since = "1.50.0") + )] + #[cfg_attr(staged_api, stable(since = "1.7.0", feature = "ip_17"))] + #[must_use] + #[inline] + pub const fn is_multicast(&self) -> bool { + (self.segments()[0] & 0xff00) == 0xff00 + } + + /// 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`. + /// + /// [`IPv4` address]: Ipv4Addr + /// [IPv4-mapped]: Ipv6Addr + /// [IETF RFC 4291 section 2.5.5.2]: https://tools.ietf.org/html/rfc4291#section-2.5.5.2 + /// + /// # Examples + /// + /// ``` + /// #![feature(ip)] + /// + /// 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); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_unstable(feature = "const_ipv6", issue = "76205") + )] + #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))] + #[must_use = "this returns the result of the operation, \ + without modifying the original"] + #[inline] + pub const fn to_ipv4_mapped(&self) -> Option<Ipv4Addr> { + match self.octets() { + [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, a, b, c, d] => { + Some(Ipv4Addr::new(a, b, c, d)) + } + _ => None, + } + } + + /// 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`]. + /// + /// `::a.b.c.d` and `::ffff:a.b.c.d` become `a.b.c.d` + /// All addresses *not* starting with either all zeroes or `::ffff` will return `None`. + /// + /// [`IPv4` address]: Ipv4Addr + /// [IPv4-compatible]: Ipv6Addr#ipv4-compatible-ipv6-addresses + /// [IPv4-mapped]: Ipv6Addr#ipv4-mapped-ipv6-addresses + /// [IETF RFC 4291 section 2.5.5.1]: https://tools.ietf.org/html/rfc4291#section-2.5.5.1 + /// [IETF RFC 4291 section 2.5.5.2]: https://tools.ietf.org/html/rfc4291#section-2.5.5.2 + /// + /// # 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))); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_stable(feature = "const_ipv6", since = "1.50.0") + )] + #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] + #[must_use = "this returns the result of the operation, \ + without modifying the original"] + #[inline] + pub const fn to_ipv4(&self) -> Option<Ipv4Addr> { + if let [0, 0, 0, 0, 0, 0 | 0xffff, ab, cd] = self.segments() { + let [a, b] = ab.to_be_bytes(); + let [c, d] = cd.to_be_bytes(); + Some(Ipv4Addr::new(a, b, c, d)) + } else { + None + } + } + + /// Converts this address to an `IpAddr::V4` if it is an IPv4-mapped addresses, otherwise it + /// returns self wrapped in an `IpAddr::V6`. + /// + /// # Examples + /// + /// ``` + /// #![feature(ip)] + /// 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); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_unstable(feature = "const_ipv6", issue = "76205") + )] + #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))] + #[must_use = "this returns the result of the operation, \ + without modifying the original"] + #[inline] + pub const fn to_canonical(&self) -> IpAddr { + if let Some(mapped) = self.to_ipv4_mapped() { + return IpAddr::V4(mapped); + } + IpAddr::V6(*self) + } + + /// 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(), + /// [255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]); + /// ``` + #[cfg_attr( + staged_api, + rustc_const_stable(feature = "const_ipv6", since = "1.32.0") + )] + #[cfg_attr(staged_api, stable(feature = "ipv6_to_octets", since = "1.12.0"))] + #[must_use] + #[inline] + pub const fn octets(&self) -> [u8; 16] { + in6_addr_s6_addr(self.inner) + } +} + +#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] +impl Clone for Ipv6Addr { + #[inline] + fn clone(&self) -> Ipv6Addr { + *self + } +} + +#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] +impl PartialEq for Ipv6Addr { + #[inline] + fn eq(&self, other: &Ipv6Addr) -> bool { + in6_addr_s6_addr(self.inner) == in6_addr_s6_addr(other.inner) + } +} + +#[cfg_attr(staged_api, stable(feature = "ip_cmp", since = "1.16.0"))] +impl PartialEq<IpAddr> for Ipv6Addr { + #[inline] + fn eq(&self, other: &IpAddr) -> bool { + match other { + IpAddr::V4(_) => false, + IpAddr::V6(v6) => self == v6, + } + } +} + +#[cfg_attr(staged_api, stable(feature = "ip_cmp", since = "1.16.0"))] +impl PartialEq<Ipv6Addr> for IpAddr { + #[inline] + fn eq(&self, other: &Ipv6Addr) -> bool { + match self { + IpAddr::V4(_) => false, + IpAddr::V6(v6) => v6 == other, + } + } +} + +#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] +impl Eq for Ipv6Addr {} + +#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] +impl hash::Hash for Ipv6Addr { + #[inline] + fn hash<H: hash::Hasher>(&self, s: &mut H) { + in6_addr_s6_addr(self.inner).hash(s) + } +} + +#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] +impl PartialOrd for Ipv6Addr { + #[inline] + fn partial_cmp(&self, other: &Ipv6Addr) -> Option<Ordering> { + Some(self.cmp(other)) + } +} + +#[cfg_attr(staged_api, stable(feature = "ip_cmp", since = "1.16.0"))] +impl PartialOrd<Ipv6Addr> for IpAddr { + #[inline] + fn partial_cmp(&self, other: &Ipv6Addr) -> Option<Ordering> { + match self { + IpAddr::V4(_) => Some(Ordering::Less), + IpAddr::V6(v6) => v6.partial_cmp(other), + } + } +} + +#[cfg_attr(staged_api, stable(feature = "ip_cmp", since = "1.16.0"))] +impl PartialOrd<IpAddr> for Ipv6Addr { + #[inline] + fn partial_cmp(&self, other: &IpAddr) -> Option<Ordering> { + match other { + IpAddr::V4(_) => Some(Ordering::Greater), + IpAddr::V6(v6) => self.partial_cmp(v6), + } + } +} + +#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] +impl Ord for Ipv6Addr { + #[inline] + fn cmp(&self, other: &Ipv6Addr) -> Ordering { + self.segments().cmp(&other.segments()) + } +} + +#[cfg_attr(staged_api, stable(feature = "i128", since = "1.26.0"))] +impl From<Ipv6Addr> for u128 { + /// Convert an `Ipv6Addr` into a host byte order `u128`. + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv6Addr; + /// + /// let addr = Ipv6Addr::new( + /// 0x1020, 0x3040, 0x5060, 0x7080, + /// 0x90A0, 0xB0C0, 0xD0E0, 0xF00D, + /// ); + /// assert_eq!(0x102030405060708090A0B0C0D0E0F00D_u128, u128::from(addr)); + /// ``` + #[inline] + fn from(ip: Ipv6Addr) -> u128 { + let ip = ip.octets(); + u128::from_be_bytes(ip) + } +} +#[cfg_attr(staged_api, stable(feature = "i128", since = "1.26.0"))] +impl From<u128> for Ipv6Addr { + /// Convert a host byte order `u128` into an `Ipv6Addr`. + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv6Addr; + /// + /// let addr = Ipv6Addr::from(0x102030405060708090A0B0C0D0E0F00D_u128); + /// assert_eq!( + /// Ipv6Addr::new( + /// 0x1020, 0x3040, 0x5060, 0x7080, + /// 0x90A0, 0xB0C0, 0xD0E0, 0xF00D, + /// ), + /// addr); + /// ``` + #[inline] + fn from(ip: u128) -> Ipv6Addr { + Ipv6Addr::from(ip.to_be_bytes()) + } +} + +#[cfg_attr(staged_api, stable(feature = "ipv6_from_octets", since = "1.9.0"))] +impl From<[u8; 16]> for Ipv6Addr { + /// Creates an `Ipv6Addr` from a sixteen element byte array. + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv6Addr; + /// + /// let addr = Ipv6Addr::from([ + /// 25u8, 24u8, 23u8, 22u8, 21u8, 20u8, 19u8, 18u8, + /// 17u8, 16u8, 15u8, 14u8, 13u8, 12u8, 11u8, 10u8, + /// ]); + /// assert_eq!( + /// Ipv6Addr::new( + /// 0x1918, 0x1716, + /// 0x1514, 0x1312, + /// 0x1110, 0x0f0e, + /// 0x0d0c, 0x0b0a + /// ), + /// addr + /// ); + /// ``` + #[inline] + fn from(octets: [u8; 16]) -> Ipv6Addr { + Ipv6Addr { + inner: in6_addr_new(octets), + } + } +} + +#[cfg_attr(staged_api, stable(feature = "ipv6_from_segments", since = "1.16.0"))] +impl From<[u16; 8]> for Ipv6Addr { + /// Creates an `Ipv6Addr` from an eight element 16-bit array. + /// + /// # Examples + /// + /// ``` + /// use std::net::Ipv6Addr; + /// + /// let addr = Ipv6Addr::from([ + /// 525u16, 524u16, 523u16, 522u16, + /// 521u16, 520u16, 519u16, 518u16, + /// ]); + /// assert_eq!( + /// Ipv6Addr::new( + /// 0x20d, 0x20c, + /// 0x20b, 0x20a, + /// 0x209, 0x208, + /// 0x207, 0x206 + /// ), + /// addr + /// ); + /// ``` + #[inline] + fn from(segments: [u16; 8]) -> Ipv6Addr { + let [a, b, c, d, e, f, g, h] = segments; + Ipv6Addr::new(a, b, c, d, e, f, g, h) + } +} + +#[cfg_attr(staged_api, stable(feature = "ip_from_slice", since = "1.17.0"))] +impl From<[u8; 16]> for IpAddr { + /// Creates an `IpAddr::V6` from a sixteen element byte array. + /// + /// # Examples + /// + /// ``` + /// use std::net::{IpAddr, Ipv6Addr}; + /// + /// let addr = IpAddr::from([ + /// 25u8, 24u8, 23u8, 22u8, 21u8, 20u8, 19u8, 18u8, + /// 17u8, 16u8, 15u8, 14u8, 13u8, 12u8, 11u8, 10u8, + /// ]); + /// assert_eq!( + /// IpAddr::V6(Ipv6Addr::new( + /// 0x1918, 0x1716, + /// 0x1514, 0x1312, + /// 0x1110, 0x0f0e, + /// 0x0d0c, 0x0b0a + /// )), + /// addr + /// ); + /// ``` + #[inline] + fn from(octets: [u8; 16]) -> IpAddr { + IpAddr::V6(Ipv6Addr::from(octets)) + } +} + +#[cfg_attr(staged_api, stable(feature = "ip_from_slice", since = "1.17.0"))] +impl From<[u16; 8]> for IpAddr { + /// Creates an `IpAddr::V6` from an eight element 16-bit array. + /// + /// # Examples + /// + /// ``` + /// use std::net::{IpAddr, Ipv6Addr}; + /// + /// let addr = IpAddr::from([ + /// 525u16, 524u16, 523u16, 522u16, + /// 521u16, 520u16, 519u16, 518u16, + /// ]); + /// assert_eq!( + /// IpAddr::V6(Ipv6Addr::new( + /// 0x20d, 0x20c, + /// 0x20b, 0x20a, + /// 0x209, 0x208, + /// 0x207, 0x206 + /// )), + /// addr + /// ); + /// ``` + #[inline] + fn from(segments: [u16; 8]) -> IpAddr { + IpAddr::V6(Ipv6Addr::from(segments)) + } +} |