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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:19:50 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:19:50 +0000
commit2e00214b3efbdfeefaa0fe9e8b8fd519de7adc35 (patch)
treed325add32978dbdc1db975a438b3a77d571b1ab8 /library/core/src/net
parentReleasing progress-linux version 1.68.2+dfsg1-1~progress7.99u1. (diff)
downloadrustc-2e00214b3efbdfeefaa0fe9e8b8fd519de7adc35.tar.xz
rustc-2e00214b3efbdfeefaa0fe9e8b8fd519de7adc35.zip
Merging upstream version 1.69.0+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'library/core/src/net')
-rw-r--r--library/core/src/net/display_buffer.rs40
-rw-r--r--library/core/src/net/ip_addr.rs2070
-rw-r--r--library/core/src/net/mod.rs24
-rw-r--r--library/core/src/net/parser.rs498
-rw-r--r--library/core/src/net/socket_addr.rs664
5 files changed, 3296 insertions, 0 deletions
diff --git a/library/core/src/net/display_buffer.rs b/library/core/src/net/display_buffer.rs
new file mode 100644
index 000000000..7aadf06e9
--- /dev/null
+++ b/library/core/src/net/display_buffer.rs
@@ -0,0 +1,40 @@
+use crate::fmt;
+use crate::mem::MaybeUninit;
+use crate::str;
+
+/// Used for slow path in `Display` implementations when alignment is required.
+pub struct DisplayBuffer<const SIZE: usize> {
+ buf: [MaybeUninit<u8>; SIZE],
+ len: usize,
+}
+
+impl<const SIZE: usize> DisplayBuffer<SIZE> {
+ #[inline]
+ pub const fn new() -> Self {
+ Self { buf: MaybeUninit::uninit_array(), len: 0 }
+ }
+
+ #[inline]
+ pub fn as_str(&self) -> &str {
+ // SAFETY: `buf` is only written to by the `fmt::Write::write_str` implementation
+ // which writes a valid UTF-8 string to `buf` and correctly sets `len`.
+ unsafe {
+ let s = MaybeUninit::slice_assume_init_ref(&self.buf[..self.len]);
+ str::from_utf8_unchecked(s)
+ }
+ }
+}
+
+impl<const SIZE: usize> fmt::Write for DisplayBuffer<SIZE> {
+ fn write_str(&mut self, s: &str) -> fmt::Result {
+ let bytes = s.as_bytes();
+
+ if let Some(buf) = self.buf.get_mut(self.len..(self.len + bytes.len())) {
+ MaybeUninit::write_slice(buf, bytes);
+ self.len += bytes.len();
+ Ok(())
+ } else {
+ Err(fmt::Error)
+ }
+ }
+}
diff --git a/library/core/src/net/ip_addr.rs b/library/core/src/net/ip_addr.rs
new file mode 100644
index 000000000..954d88d54
--- /dev/null
+++ b/library/core/src/net/ip_addr.rs
@@ -0,0 +1,2070 @@
+use crate::cmp::Ordering;
+use crate::fmt::{self, Write};
+use crate::mem::transmute;
+
+use super::display_buffer::DisplayBuffer;
+
+/// An IP address, either IPv4 or IPv6.
+///
+/// This enum can contain either an [`Ipv4Addr`] or an [`Ipv6Addr`], see their
+/// respective documentation for more details.
+///
+/// # 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(not(test), rustc_diagnostic_item = "IpAddr")]
+#[stable(feature = "ip_addr", since = "1.7.0")]
+#[derive(Copy, Clone, Eq, PartialEq, Hash, PartialOrd, Ord)]
+pub enum IpAddr {
+ /// An IPv4 address.
+ #[stable(feature = "ip_addr", since = "1.7.0")]
+ V4(#[stable(feature = "ip_addr", since = "1.7.0")] Ipv4Addr),
+ /// An IPv6 address.
+ #[stable(feature = "ip_addr", since = "1.7.0")]
+ V6(#[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.
+///
+/// [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`]: crate::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, Clone, PartialEq, Eq, Hash)]
+#[stable(feature = "rust1", since = "1.0.0")]
+pub struct Ipv4Addr {
+ octets: [u8; 4],
+}
+
+/// An IPv6 address.
+///
+/// IPv6 addresses are defined as 128-bit integers in [IETF RFC 4291].
+/// They are usually represented as eight 16-bit segments.
+///
+/// [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.
+/// Note that this will also convert the IPv6 loopback address `::1` to `0.0.0.1`. Use
+/// [`Ipv6Addr::to_ipv4_mapped`] to avoid this.
+///
+/// [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`]: crate::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, Clone, PartialEq, Eq, Hash)]
+#[stable(feature = "rust1", since = "1.0.0")]
+pub struct Ipv6Addr {
+ octets: [u8; 16],
+}
+
+/// 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)]
+#[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);
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_50", since = "1.50.0")]
+ #[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);
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_50", since = "1.50.0")]
+ #[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);
+ /// ```
+ #[rustc_const_unstable(feature = "const_ip", issue = "76205")]
+ #[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);
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_50", since = "1.50.0")]
+ #[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
+ /// );
+ /// ```
+ #[rustc_const_unstable(feature = "const_ip", issue = "76205")]
+ #[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);
+ /// ```
+ #[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);
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_50", since = "1.50.0")]
+ #[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);
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_50", since = "1.50.0")]
+ #[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"]
+ #[rustc_const_unstable(feature = "const_ip", issue = "76205")]
+ #[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);
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_32", since = "1.32.0")]
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[must_use]
+ #[inline]
+ pub const fn new(a: u8, b: u8, c: u8, d: u8) -> Ipv4Addr {
+ Ipv4Addr { octets: [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));
+ /// ```
+ #[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")]
+ #[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));
+ /// ```
+ #[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]);
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_50", since = "1.50.0")]
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[must_use]
+ #[inline]
+ pub const fn octets(&self) -> [u8; 4] {
+ self.octets
+ }
+
+ /// 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);
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_32", since = "1.32.0")]
+ #[stable(feature = "ip_shared", since = "1.12.0")]
+ #[must_use]
+ #[inline]
+ pub const fn is_unspecified(&self) -> bool {
+ u32::from_be_bytes(self.octets) == 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);
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_50", since = "1.50.0")]
+ #[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);
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_50", since = "1.50.0")]
+ #[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);
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_50", since = "1.50.0")]
+ #[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 reachable
+ /// as specified by the [IANA IPv4 Special-Purpose Address Registry].
+ /// Whether or not an address is practically reachable will depend on your network configuration.
+ ///
+ /// Most IPv4 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`](Ipv4Addr::is_unspecified))
+ /// - Addresses reserved for private use ([`is_private`](Ipv4Addr::is_private))
+ /// - Addresses in the shared address space ([`is_shared`](Ipv4Addr::is_shared))
+ /// - Loopback addresses ([`is_loopback`](Ipv4Addr::is_loopback))
+ /// - Link-local addresses ([`is_link_local`](Ipv4Addr::is_link_local))
+ /// - Addresses reserved for documentation ([`is_documentation`](Ipv4Addr::is_documentation))
+ /// - Addresses reserved for benchmarking ([`is_benchmarking`](Ipv4Addr::is_benchmarking))
+ /// - Reserved addresses ([`is_reserved`](Ipv4Addr::is_reserved))
+ /// - The [broadcast address] ([`is_broadcast`](Ipv4Addr::is_broadcast))
+ ///
+ /// For the complete overview of which addresses are globally reachable, see the table at the [IANA IPv4 Special-Purpose Address Registry].
+ ///
+ /// [IANA IPv4 Special-Purpose Address Registry]: https://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml
+ /// [unspecified address]: Ipv4Addr::UNSPECIFIED
+ /// [broadcast address]: Ipv4Addr::BROADCAST
+
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// #![feature(ip)]
+ ///
+ /// use std::net::Ipv4Addr;
+ ///
+ /// // Most IPv4 addresses are globally reachable:
+ /// assert_eq!(Ipv4Addr::new(80, 9, 12, 3).is_global(), true);
+ ///
+ /// // However some addresses have been assigned a special meaning
+ /// // that makes them not globally reachable. Some examples are:
+ ///
+ /// // The unspecified address (`0.0.0.0`)
+ /// assert_eq!(Ipv4Addr::UNSPECIFIED.is_global(), false);
+ ///
+ /// // Addresses reserved for private use (`10.0.0.0/8`, `172.16.0.0/12`, 192.168.0.0/16)
+ /// 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);
+ ///
+ /// // Addresses in the shared address space (`100.64.0.0/10`)
+ /// assert_eq!(Ipv4Addr::new(100, 100, 0, 0).is_global(), false);
+ ///
+ /// // The loopback addresses (`127.0.0.0/8`)
+ /// assert_eq!(Ipv4Addr::LOCALHOST.is_global(), false);
+ ///
+ /// // Link-local addresses (`169.254.0.0/16`)
+ /// assert_eq!(Ipv4Addr::new(169, 254, 45, 1).is_global(), false);
+ ///
+ /// // Addresses reserved for documentation (`192.0.2.0/24`, `198.51.100.0/24`, `203.0.113.0/24`)
+ /// 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);
+ ///
+ /// // Addresses reserved for benchmarking (`198.18.0.0/15`)
+ /// assert_eq!(Ipv4Addr::new(198, 18, 0, 0).is_global(), false);
+ ///
+ /// // Reserved addresses (`240.0.0.0/4`)
+ /// assert_eq!(Ipv4Addr::new(250, 10, 20, 30).is_global(), false);
+ ///
+ /// // The broadcast address (`255.255.255.255`)
+ /// assert_eq!(Ipv4Addr::BROADCAST.is_global(), false);
+ ///
+ /// // For a complete overview see the IANA IPv4 Special-Purpose Address Registry.
+ /// ```
+ #[rustc_const_unstable(feature = "const_ipv4", issue = "76205")]
+ #[unstable(feature = "ip", issue = "27709")]
+ #[must_use]
+ #[inline]
+ pub const fn is_global(&self) -> bool {
+ !(self.octets()[0] == 0 // "This network"
+ || self.is_private()
+ || self.is_shared()
+ || self.is_loopback()
+ || self.is_link_local()
+ // addresses reserved for future protocols (`192.0.0.0/24`)
+ ||(self.octets()[0] == 192 && self.octets()[1] == 0 && self.octets()[2] == 0)
+ || self.is_documentation()
+ || self.is_benchmarking()
+ || self.is_reserved()
+ || self.is_broadcast())
+ }
+
+ /// 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);
+ /// ```
+ #[rustc_const_unstable(feature = "const_ipv4", issue = "76205")]
+ #[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);
+ /// ```
+ #[rustc_const_unstable(feature = "const_ipv4", issue = "76205")]
+ #[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);
+ /// ```
+ #[rustc_const_unstable(feature = "const_ipv4", issue = "76205")]
+ #[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);
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_50", since = "1.50.0")]
+ #[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);
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_50", since = "1.50.0")]
+ #[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);
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_50", since = "1.50.0")]
+ #[stable(since = "1.7.0", feature = "ip_17")]
+ #[must_use]
+ #[inline]
+ pub const fn is_documentation(&self) -> bool {
+ matches!(self.octets(), [192, 0, 2, _] | [198, 51, 100, _] | [203, 0, 113, _])
+ }
+
+ /// 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)
+ /// );
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_50", since = "1.50.0")]
+ #[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 { octets: [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));
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_50", since = "1.50.0")]
+ #[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 { octets: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF, a, b, c, d] }
+ }
+}
+
+#[stable(feature = "ip_addr", since = "1.7.0")]
+impl fmt::Display for IpAddr {
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ match self {
+ IpAddr::V4(ip) => ip.fmt(fmt),
+ IpAddr::V6(ip) => ip.fmt(fmt),
+ }
+ }
+}
+
+#[stable(feature = "ip_addr", since = "1.7.0")]
+impl fmt::Debug for IpAddr {
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ fmt::Display::fmt(self, fmt)
+ }
+}
+
+#[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)
+ }
+}
+
+#[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)
+ }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl fmt::Display for Ipv4Addr {
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ let octets = self.octets();
+
+ // If there are no alignment requirements, write the IP address directly to `f`.
+ // Otherwise, write it to a local buffer and then use `f.pad`.
+ if fmt.precision().is_none() && fmt.width().is_none() {
+ write!(fmt, "{}.{}.{}.{}", octets[0], octets[1], octets[2], octets[3])
+ } else {
+ const LONGEST_IPV4_ADDR: &str = "255.255.255.255";
+
+ let mut buf = DisplayBuffer::<{ LONGEST_IPV4_ADDR.len() }>::new();
+ // Buffer is long enough for the longest possible IPv4 address, so this should never fail.
+ write!(buf, "{}.{}.{}.{}", octets[0], octets[1], octets[2], octets[3]).unwrap();
+
+ fmt.pad(buf.as_str())
+ }
+ }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl fmt::Debug for Ipv4Addr {
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ fmt::Display::fmt(self, fmt)
+ }
+}
+
+#[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,
+ }
+ }
+}
+
+#[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,
+ }
+ }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl PartialOrd for Ipv4Addr {
+ #[inline]
+ fn partial_cmp(&self, other: &Ipv4Addr) -> Option<Ordering> {
+ Some(self.cmp(other))
+ }
+}
+
+#[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),
+ }
+ }
+}
+
+#[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),
+ }
+ }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl Ord for Ipv4Addr {
+ #[inline]
+ fn cmp(&self, other: &Ipv4Addr) -> Ordering {
+ self.octets.cmp(&other.octets)
+ }
+}
+
+#[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(0x12, 0x34, 0x56, 0x78);
+ /// assert_eq!(0x12345678, u32::from(addr));
+ /// ```
+ #[inline]
+ fn from(ip: Ipv4Addr) -> u32 {
+ u32::from_be_bytes(ip.octets)
+ }
+}
+
+#[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(0x12345678);
+ /// assert_eq!(Ipv4Addr::new(0x12, 0x34, 0x56, 0x78), addr);
+ /// ```
+ #[inline]
+ fn from(ip: u32) -> Ipv4Addr {
+ Ipv4Addr { octets: ip.to_be_bytes() }
+ }
+}
+
+#[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 { octets }
+ }
+}
+
+#[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);
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_32", since = "1.32.0")]
+ #[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]`.
+ octets: unsafe { transmute::<_, [u8; 16]>(addr16) },
+ }
+ }
+
+ /// An IPv6 address representing localhost: `::1`.
+ ///
+ /// This corresponds to constant `IN6ADDR_LOOPBACK_INIT` or `in6addr_loopback` in other
+ /// languages.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::Ipv6Addr;
+ ///
+ /// let addr = Ipv6Addr::LOCALHOST;
+ /// assert_eq!(addr, Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1));
+ /// ```
+ #[doc(alias = "IN6ADDR_LOOPBACK_INIT")]
+ #[doc(alias = "in6addr_loopback")]
+ #[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: `::`
+ ///
+ /// This corresponds to constant `IN6ADDR_ANY_INIT` or `in6addr_any` in other languages.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::Ipv6Addr;
+ ///
+ /// let addr = Ipv6Addr::UNSPECIFIED;
+ /// assert_eq!(addr, Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0));
+ /// ```
+ #[doc(alias = "IN6ADDR_ANY_INIT")]
+ #[doc(alias = "in6addr_any")]
+ #[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]);
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_50", since = "1.50.0")]
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[must_use]
+ #[inline]
+ pub const fn segments(&self) -> [u16; 8] {
+ // All elements in `self.octets` must be big endian.
+ // SAFETY: `[u8; 16]` is always safe to transmute to `[u16; 8]`.
+ let [a, b, c, d, e, f, g, h] = unsafe { transmute::<_, [u16; 8]>(self.octets) };
+ // 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);
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_50", since = "1.50.0")]
+ #[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);
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_50", since = "1.50.0")]
+ #[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 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`](Ipv6Addr::is_unspecified))
+ /// - The [loopback address] ([`is_loopback`](Ipv6Addr::is_loopback))
+ /// - IPv4-mapped addresses
+ /// - Addresses reserved for benchmarking
+ /// - Addresses reserved for documentation ([`is_documentation`](Ipv6Addr::is_documentation))
+ /// - Unique local addresses ([`is_unique_local`](Ipv6Addr::is_unique_local))
+ /// - Unicast addresses with link-local scope ([`is_unicast_link_local`](Ipv6Addr::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).
+ ///
+ /// [IANA IPv6 Special-Purpose Address Registry]: https://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml
+ /// [unspecified address]: Ipv6Addr::UNSPECIFIED
+ /// [loopback address]: Ipv6Addr::LOCALHOST
+ ///
+ /// # 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`)
+ /// assert_eq!(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 1).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.
+ /// ```
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
+ #[unstable(feature = "ip", issue = "27709")]
+ #[must_use]
+ #[inline]
+ pub const fn is_global(&self) -> bool {
+ !(self.is_unspecified()
+ || self.is_loopback()
+ // IPv4-mapped Address (`::ffff:0:0/96`)
+ || matches!(self.segments(), [0, 0, 0, 0, 0, 0xffff, _, _])
+ // IPv4-IPv6 Translat. (`64:ff9b:1::/48`)
+ || matches!(self.segments(), [0x64, 0xff9b, 1, _, _, _, _, _])
+ // Discard-Only Address Block (`100::/64`)
+ || matches!(self.segments(), [0x100, 0, 0, 0, _, _, _, _])
+ // IETF Protocol Assignments (`2001::/23`)
+ || (matches!(self.segments(), [0x2001, b, _, _, _, _, _, _] if b < 0x200)
+ && !(
+ // Port Control Protocol Anycast (`2001:1::1`)
+ u128::from_be_bytes(self.octets()) == 0x2001_0001_0000_0000_0000_0000_0000_0001
+ // Traversal Using Relays around NAT Anycast (`2001:1::2`)
+ || u128::from_be_bytes(self.octets()) == 0x2001_0001_0000_0000_0000_0000_0000_0002
+ // AMT (`2001:3::/32`)
+ || matches!(self.segments(), [0x2001, 3, _, _, _, _, _, _])
+ // AS112-v6 (`2001:4:112::/48`)
+ || matches!(self.segments(), [0x2001, 4, 0x112, _, _, _, _, _])
+ // ORCHIDv2 (`2001:20::/28`)
+ || matches!(self.segments(), [0x2001, b, _, _, _, _, _, _] if b >= 0x20 && b <= 0x2F)
+ ))
+ || self.is_documentation()
+ || self.is_unique_local()
+ || self.is_unicast_link_local())
+ }
+
+ /// 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);
+ /// ```
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
+ #[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);
+ /// ```
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
+ #[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);
+ /// ```
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
+ #[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);
+ /// ```
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
+ #[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);
+ /// ```
+ #[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);
+ /// ```
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
+ #[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()
+ && !self.is_benchmarking()
+ }
+
+ /// 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);
+ /// ```
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
+ #[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);
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_50", since = "1.50.0")]
+ #[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
+ ///
+ /// ```
+ /// 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);
+ /// ```
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
+ #[stable(feature = "ipv6_to_ipv4_mapped", since = "1.63.0")]
+ #[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`].
+ ///
+ /// 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`.
+ ///
+ /// [`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)));
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_50", since = "1.50.0")]
+ #[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);
+ /// ```
+ #[rustc_const_unstable(feature = "const_ipv6", issue = "76205")]
+ #[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]);
+ /// ```
+ #[rustc_const_stable(feature = "const_ip_32", since = "1.32.0")]
+ #[stable(feature = "ipv6_to_octets", since = "1.12.0")]
+ #[must_use]
+ #[inline]
+ pub const fn octets(&self) -> [u8; 16] {
+ self.octets
+ }
+}
+
+/// Write an Ipv6Addr, conforming to the canonical style described by
+/// [RFC 5952](https://tools.ietf.org/html/rfc5952).
+#[stable(feature = "rust1", since = "1.0.0")]
+impl fmt::Display for Ipv6Addr {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ // If there are no alignment requirements, write the IP address directly to `f`.
+ // Otherwise, write it to a local buffer and then use `f.pad`.
+ if f.precision().is_none() && f.width().is_none() {
+ let segments = self.segments();
+
+ // Special case for :: and ::1; otherwise they get written with the
+ // IPv4 formatter
+ if self.is_unspecified() {
+ f.write_str("::")
+ } else if self.is_loopback() {
+ f.write_str("::1")
+ } else if let Some(ipv4) = self.to_ipv4() {
+ match segments[5] {
+ // IPv4 Compatible address
+ 0 => write!(f, "::{}", ipv4),
+ // IPv4 Mapped address
+ 0xffff => write!(f, "::ffff:{}", ipv4),
+ _ => unreachable!(),
+ }
+ } else {
+ #[derive(Copy, Clone, Default)]
+ struct Span {
+ start: usize,
+ len: usize,
+ }
+
+ // Find the inner 0 span
+ let zeroes = {
+ let mut longest = Span::default();
+ let mut current = Span::default();
+
+ for (i, &segment) in segments.iter().enumerate() {
+ if segment == 0 {
+ if current.len == 0 {
+ current.start = i;
+ }
+
+ current.len += 1;
+
+ if current.len > longest.len {
+ longest = current;
+ }
+ } else {
+ current = Span::default();
+ }
+ }
+
+ longest
+ };
+
+ /// Write a colon-separated part of the address
+ #[inline]
+ fn fmt_subslice(f: &mut fmt::Formatter<'_>, chunk: &[u16]) -> fmt::Result {
+ if let Some((first, tail)) = chunk.split_first() {
+ write!(f, "{:x}", first)?;
+ for segment in tail {
+ f.write_char(':')?;
+ write!(f, "{:x}", segment)?;
+ }
+ }
+ Ok(())
+ }
+
+ if zeroes.len > 1 {
+ fmt_subslice(f, &segments[..zeroes.start])?;
+ f.write_str("::")?;
+ fmt_subslice(f, &segments[zeroes.start + zeroes.len..])
+ } else {
+ fmt_subslice(f, &segments)
+ }
+ }
+ } else {
+ const LONGEST_IPV6_ADDR: &str = "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff";
+
+ let mut buf = DisplayBuffer::<{ LONGEST_IPV6_ADDR.len() }>::new();
+ // Buffer is long enough for the longest possible IPv6 address, so this should never fail.
+ write!(buf, "{}", self).unwrap();
+
+ f.pad(buf.as_str())
+ }
+ }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl fmt::Debug for Ipv6Addr {
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ fmt::Display::fmt(self, fmt)
+ }
+}
+
+#[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,
+ }
+ }
+}
+
+#[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,
+ }
+ }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl PartialOrd for Ipv6Addr {
+ #[inline]
+ fn partial_cmp(&self, other: &Ipv6Addr) -> Option<Ordering> {
+ Some(self.cmp(other))
+ }
+}
+
+#[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),
+ }
+ }
+}
+
+#[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),
+ }
+ }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl Ord for Ipv6Addr {
+ #[inline]
+ fn cmp(&self, other: &Ipv6Addr) -> Ordering {
+ self.segments().cmp(&other.segments())
+ }
+}
+
+#[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 {
+ u128::from_be_bytes(ip.octets)
+ }
+}
+#[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())
+ }
+}
+
+#[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 { octets }
+ }
+}
+
+#[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)
+ }
+}
+
+#[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))
+ }
+}
+
+#[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))
+ }
+}
diff --git a/library/core/src/net/mod.rs b/library/core/src/net/mod.rs
new file mode 100644
index 000000000..31f5f5d3c
--- /dev/null
+++ b/library/core/src/net/mod.rs
@@ -0,0 +1,24 @@
+//! Networking primitives for IP communication.
+//!
+//! This module provides types for IP and socket addresses.
+//!
+//! # Organization
+//!
+//! * [`IpAddr`] represents IP addresses of either IPv4 or IPv6; [`Ipv4Addr`] and
+//! [`Ipv6Addr`] are respectively IPv4 and IPv6 addresses
+//! * [`SocketAddr`] represents socket addresses of either IPv4 or IPv6; [`SocketAddrV4`]
+//! and [`SocketAddrV6`] are respectively IPv4 and IPv6 socket addresses
+
+#![unstable(feature = "ip_in_core", issue = "108443")]
+
+#[stable(feature = "rust1", since = "1.0.0")]
+pub use self::ip_addr::{IpAddr, Ipv4Addr, Ipv6Addr, Ipv6MulticastScope};
+#[stable(feature = "rust1", since = "1.0.0")]
+pub use self::parser::AddrParseError;
+#[stable(feature = "rust1", since = "1.0.0")]
+pub use self::socket_addr::{SocketAddr, SocketAddrV4, SocketAddrV6};
+
+mod display_buffer;
+mod ip_addr;
+mod parser;
+mod socket_addr;
diff --git a/library/core/src/net/parser.rs b/library/core/src/net/parser.rs
new file mode 100644
index 000000000..a08d2792d
--- /dev/null
+++ b/library/core/src/net/parser.rs
@@ -0,0 +1,498 @@
+//! A private parser implementation of IPv4, IPv6, and socket addresses.
+//!
+//! This module is "publicly exported" through the `FromStr` implementations
+//! below.
+
+use crate::convert::TryInto;
+use crate::error::Error;
+use crate::fmt;
+use crate::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAddrV6};
+use crate::str::FromStr;
+
+trait ReadNumberHelper: crate::marker::Sized {
+ const ZERO: Self;
+ fn checked_mul(&self, other: u32) -> Option<Self>;
+ fn checked_add(&self, other: u32) -> Option<Self>;
+}
+
+macro_rules! impl_helper {
+ ($($t:ty)*) => ($(impl ReadNumberHelper for $t {
+ const ZERO: Self = 0;
+ #[inline]
+ fn checked_mul(&self, other: u32) -> Option<Self> {
+ Self::checked_mul(*self, other.try_into().ok()?)
+ }
+ #[inline]
+ fn checked_add(&self, other: u32) -> Option<Self> {
+ Self::checked_add(*self, other.try_into().ok()?)
+ }
+ })*)
+}
+
+impl_helper! { u8 u16 u32 }
+
+struct Parser<'a> {
+ // Parsing as ASCII, so can use byte array.
+ state: &'a [u8],
+}
+
+impl<'a> Parser<'a> {
+ fn new(input: &'a [u8]) -> Parser<'a> {
+ Parser { state: input }
+ }
+
+ /// Run a parser, and restore the pre-parse state if it fails.
+ fn read_atomically<T, F>(&mut self, inner: F) -> Option<T>
+ where
+ F: FnOnce(&mut Parser<'_>) -> Option<T>,
+ {
+ let state = self.state;
+ let result = inner(self);
+ if result.is_none() {
+ self.state = state;
+ }
+ result
+ }
+
+ /// Run a parser, but fail if the entire input wasn't consumed.
+ /// Doesn't run atomically.
+ fn parse_with<T, F>(&mut self, inner: F, kind: AddrKind) -> Result<T, AddrParseError>
+ where
+ F: FnOnce(&mut Parser<'_>) -> Option<T>,
+ {
+ let result = inner(self);
+ if self.state.is_empty() { result } else { None }.ok_or(AddrParseError(kind))
+ }
+
+ /// Peek the next character from the input
+ fn peek_char(&self) -> Option<char> {
+ self.state.first().map(|&b| char::from(b))
+ }
+
+ /// Read the next character from the input
+ fn read_char(&mut self) -> Option<char> {
+ self.state.split_first().map(|(&b, tail)| {
+ self.state = tail;
+ char::from(b)
+ })
+ }
+
+ #[must_use]
+ /// Read the next character from the input if it matches the target.
+ fn read_given_char(&mut self, target: char) -> Option<()> {
+ self.read_atomically(|p| {
+ p.read_char().and_then(|c| if c == target { Some(()) } else { None })
+ })
+ }
+
+ /// Helper for reading separators in an indexed loop. Reads the separator
+ /// character iff index > 0, then runs the parser. When used in a loop,
+ /// the separator character will only be read on index > 0 (see
+ /// read_ipv4_addr for an example)
+ fn read_separator<T, F>(&mut self, sep: char, index: usize, inner: F) -> Option<T>
+ where
+ F: FnOnce(&mut Parser<'_>) -> Option<T>,
+ {
+ self.read_atomically(move |p| {
+ if index > 0 {
+ p.read_given_char(sep)?;
+ }
+ inner(p)
+ })
+ }
+
+ // Read a number off the front of the input in the given radix, stopping
+ // at the first non-digit character or eof. Fails if the number has more
+ // digits than max_digits or if there is no number.
+ fn read_number<T: ReadNumberHelper>(
+ &mut self,
+ radix: u32,
+ max_digits: Option<usize>,
+ allow_zero_prefix: bool,
+ ) -> Option<T> {
+ self.read_atomically(move |p| {
+ let mut result = T::ZERO;
+ let mut digit_count = 0;
+ let has_leading_zero = p.peek_char() == Some('0');
+
+ while let Some(digit) = p.read_atomically(|p| p.read_char()?.to_digit(radix)) {
+ result = result.checked_mul(radix)?;
+ result = result.checked_add(digit)?;
+ digit_count += 1;
+ if let Some(max_digits) = max_digits {
+ if digit_count > max_digits {
+ return None;
+ }
+ }
+ }
+
+ if digit_count == 0 {
+ None
+ } else if !allow_zero_prefix && has_leading_zero && digit_count > 1 {
+ None
+ } else {
+ Some(result)
+ }
+ })
+ }
+
+ /// Read an IPv4 address.
+ fn read_ipv4_addr(&mut self) -> Option<Ipv4Addr> {
+ self.read_atomically(|p| {
+ let mut groups = [0; 4];
+
+ for (i, slot) in groups.iter_mut().enumerate() {
+ *slot = p.read_separator('.', i, |p| {
+ // Disallow octal number in IP string.
+ // https://tools.ietf.org/html/rfc6943#section-3.1.1
+ p.read_number(10, Some(3), false)
+ })?;
+ }
+
+ Some(groups.into())
+ })
+ }
+
+ /// Read an IPv6 Address.
+ fn read_ipv6_addr(&mut self) -> Option<Ipv6Addr> {
+ /// Read a chunk of an IPv6 address into `groups`. Returns the number
+ /// of groups read, along with a bool indicating if an embedded
+ /// trailing IPv4 address was read. Specifically, read a series of
+ /// colon-separated IPv6 groups (0x0000 - 0xFFFF), with an optional
+ /// trailing embedded IPv4 address.
+ fn read_groups(p: &mut Parser<'_>, groups: &mut [u16]) -> (usize, bool) {
+ let limit = groups.len();
+
+ for (i, slot) in groups.iter_mut().enumerate() {
+ // Try to read a trailing embedded IPv4 address. There must be
+ // at least two groups left.
+ if i < limit - 1 {
+ let ipv4 = p.read_separator(':', i, |p| p.read_ipv4_addr());
+
+ if let Some(v4_addr) = ipv4 {
+ let [one, two, three, four] = v4_addr.octets();
+ groups[i + 0] = u16::from_be_bytes([one, two]);
+ groups[i + 1] = u16::from_be_bytes([three, four]);
+ return (i + 2, true);
+ }
+ }
+
+ let group = p.read_separator(':', i, |p| p.read_number(16, Some(4), true));
+
+ match group {
+ Some(g) => *slot = g,
+ None => return (i, false),
+ }
+ }
+ (groups.len(), false)
+ }
+
+ self.read_atomically(|p| {
+ // Read the front part of the address; either the whole thing, or up
+ // to the first ::
+ let mut head = [0; 8];
+ let (head_size, head_ipv4) = read_groups(p, &mut head);
+
+ if head_size == 8 {
+ return Some(head.into());
+ }
+
+ // IPv4 part is not allowed before `::`
+ if head_ipv4 {
+ return None;
+ }
+
+ // Read `::` if previous code parsed less than 8 groups.
+ // `::` indicates one or more groups of 16 bits of zeros.
+ p.read_given_char(':')?;
+ p.read_given_char(':')?;
+
+ // Read the back part of the address. The :: must contain at least one
+ // set of zeroes, so our max length is 7.
+ let mut tail = [0; 7];
+ let limit = 8 - (head_size + 1);
+ let (tail_size, _) = read_groups(p, &mut tail[..limit]);
+
+ // Concat the head and tail of the IP address
+ head[(8 - tail_size)..8].copy_from_slice(&tail[..tail_size]);
+
+ Some(head.into())
+ })
+ }
+
+ /// Read an IP Address, either IPv4 or IPv6.
+ fn read_ip_addr(&mut self) -> Option<IpAddr> {
+ self.read_ipv4_addr().map(IpAddr::V4).or_else(move || self.read_ipv6_addr().map(IpAddr::V6))
+ }
+
+ /// Read a `:` followed by a port in base 10.
+ fn read_port(&mut self) -> Option<u16> {
+ self.read_atomically(|p| {
+ p.read_given_char(':')?;
+ p.read_number(10, None, true)
+ })
+ }
+
+ /// Read a `%` followed by a scope ID in base 10.
+ fn read_scope_id(&mut self) -> Option<u32> {
+ self.read_atomically(|p| {
+ p.read_given_char('%')?;
+ p.read_number(10, None, true)
+ })
+ }
+
+ /// Read an IPv4 address with a port.
+ fn read_socket_addr_v4(&mut self) -> Option<SocketAddrV4> {
+ self.read_atomically(|p| {
+ let ip = p.read_ipv4_addr()?;
+ let port = p.read_port()?;
+ Some(SocketAddrV4::new(ip, port))
+ })
+ }
+
+ /// Read an IPv6 address with a port.
+ fn read_socket_addr_v6(&mut self) -> Option<SocketAddrV6> {
+ self.read_atomically(|p| {
+ p.read_given_char('[')?;
+ let ip = p.read_ipv6_addr()?;
+ let scope_id = p.read_scope_id().unwrap_or(0);
+ p.read_given_char(']')?;
+
+ let port = p.read_port()?;
+ Some(SocketAddrV6::new(ip, port, 0, scope_id))
+ })
+ }
+
+ /// Read an IP address with a port
+ fn read_socket_addr(&mut self) -> Option<SocketAddr> {
+ self.read_socket_addr_v4()
+ .map(SocketAddr::V4)
+ .or_else(|| self.read_socket_addr_v6().map(SocketAddr::V6))
+ }
+}
+
+impl IpAddr {
+ /// Parse an IP address from a slice of bytes.
+ ///
+ /// ```
+ /// #![feature(addr_parse_ascii)]
+ ///
+ /// 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!(IpAddr::parse_ascii(b"127.0.0.1"), Ok(localhost_v4));
+ /// assert_eq!(IpAddr::parse_ascii(b"::1"), Ok(localhost_v6));
+ /// ```
+ #[unstable(feature = "addr_parse_ascii", issue = "101035")]
+ pub fn parse_ascii(b: &[u8]) -> Result<Self, AddrParseError> {
+ Parser::new(b).parse_with(|p| p.read_ip_addr(), AddrKind::Ip)
+ }
+}
+
+#[stable(feature = "ip_addr", since = "1.7.0")]
+impl FromStr for IpAddr {
+ type Err = AddrParseError;
+ fn from_str(s: &str) -> Result<IpAddr, AddrParseError> {
+ Self::parse_ascii(s.as_bytes())
+ }
+}
+
+impl Ipv4Addr {
+ /// Parse an IPv4 address from a slice of bytes.
+ ///
+ /// ```
+ /// #![feature(addr_parse_ascii)]
+ ///
+ /// use std::net::Ipv4Addr;
+ ///
+ /// let localhost = Ipv4Addr::new(127, 0, 0, 1);
+ ///
+ /// assert_eq!(Ipv4Addr::parse_ascii(b"127.0.0.1"), Ok(localhost));
+ /// ```
+ #[unstable(feature = "addr_parse_ascii", issue = "101035")]
+ pub fn parse_ascii(b: &[u8]) -> Result<Self, AddrParseError> {
+ // don't try to parse if too long
+ if b.len() > 15 {
+ Err(AddrParseError(AddrKind::Ipv4))
+ } else {
+ Parser::new(b).parse_with(|p| p.read_ipv4_addr(), AddrKind::Ipv4)
+ }
+ }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl FromStr for Ipv4Addr {
+ type Err = AddrParseError;
+ fn from_str(s: &str) -> Result<Ipv4Addr, AddrParseError> {
+ Self::parse_ascii(s.as_bytes())
+ }
+}
+
+impl Ipv6Addr {
+ /// Parse an IPv6 address from a slice of bytes.
+ ///
+ /// ```
+ /// #![feature(addr_parse_ascii)]
+ ///
+ /// use std::net::Ipv6Addr;
+ ///
+ /// let localhost = Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1);
+ ///
+ /// assert_eq!(Ipv6Addr::parse_ascii(b"::1"), Ok(localhost));
+ /// ```
+ #[unstable(feature = "addr_parse_ascii", issue = "101035")]
+ pub fn parse_ascii(b: &[u8]) -> Result<Self, AddrParseError> {
+ Parser::new(b).parse_with(|p| p.read_ipv6_addr(), AddrKind::Ipv6)
+ }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl FromStr for Ipv6Addr {
+ type Err = AddrParseError;
+ fn from_str(s: &str) -> Result<Ipv6Addr, AddrParseError> {
+ Self::parse_ascii(s.as_bytes())
+ }
+}
+
+impl SocketAddrV4 {
+ /// Parse an IPv4 socket address from a slice of bytes.
+ ///
+ /// ```
+ /// #![feature(addr_parse_ascii)]
+ ///
+ /// use std::net::{Ipv4Addr, SocketAddrV4};
+ ///
+ /// let socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
+ ///
+ /// assert_eq!(SocketAddrV4::parse_ascii(b"127.0.0.1:8080"), Ok(socket));
+ /// ```
+ #[unstable(feature = "addr_parse_ascii", issue = "101035")]
+ pub fn parse_ascii(b: &[u8]) -> Result<Self, AddrParseError> {
+ Parser::new(b).parse_with(|p| p.read_socket_addr_v4(), AddrKind::SocketV4)
+ }
+}
+
+#[stable(feature = "socket_addr_from_str", since = "1.5.0")]
+impl FromStr for SocketAddrV4 {
+ type Err = AddrParseError;
+ fn from_str(s: &str) -> Result<SocketAddrV4, AddrParseError> {
+ Self::parse_ascii(s.as_bytes())
+ }
+}
+
+impl SocketAddrV6 {
+ /// Parse an IPv6 socket address from a slice of bytes.
+ ///
+ /// ```
+ /// #![feature(addr_parse_ascii)]
+ ///
+ /// use std::net::{Ipv6Addr, SocketAddrV6};
+ ///
+ /// let socket = SocketAddrV6::new(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 1), 8080, 0, 0);
+ ///
+ /// assert_eq!(SocketAddrV6::parse_ascii(b"[2001:db8::1]:8080"), Ok(socket));
+ /// ```
+ #[unstable(feature = "addr_parse_ascii", issue = "101035")]
+ pub fn parse_ascii(b: &[u8]) -> Result<Self, AddrParseError> {
+ Parser::new(b).parse_with(|p| p.read_socket_addr_v6(), AddrKind::SocketV6)
+ }
+}
+
+#[stable(feature = "socket_addr_from_str", since = "1.5.0")]
+impl FromStr for SocketAddrV6 {
+ type Err = AddrParseError;
+ fn from_str(s: &str) -> Result<SocketAddrV6, AddrParseError> {
+ Self::parse_ascii(s.as_bytes())
+ }
+}
+
+impl SocketAddr {
+ /// Parse a socket address from a slice of bytes.
+ ///
+ /// ```
+ /// #![feature(addr_parse_ascii)]
+ ///
+ /// use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr};
+ ///
+ /// let socket_v4 = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
+ /// let socket_v6 = SocketAddr::new(IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1)), 8080);
+ ///
+ /// assert_eq!(SocketAddr::parse_ascii(b"127.0.0.1:8080"), Ok(socket_v4));
+ /// assert_eq!(SocketAddr::parse_ascii(b"[::1]:8080"), Ok(socket_v6));
+ /// ```
+ #[unstable(feature = "addr_parse_ascii", issue = "101035")]
+ pub fn parse_ascii(b: &[u8]) -> Result<Self, AddrParseError> {
+ Parser::new(b).parse_with(|p| p.read_socket_addr(), AddrKind::Socket)
+ }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl FromStr for SocketAddr {
+ type Err = AddrParseError;
+ fn from_str(s: &str) -> Result<SocketAddr, AddrParseError> {
+ Self::parse_ascii(s.as_bytes())
+ }
+}
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+enum AddrKind {
+ Ip,
+ Ipv4,
+ Ipv6,
+ Socket,
+ SocketV4,
+ SocketV6,
+}
+
+/// An error which can be returned when parsing an IP address or a socket address.
+///
+/// This error is used as the error type for the [`FromStr`] implementation for
+/// [`IpAddr`], [`Ipv4Addr`], [`Ipv6Addr`], [`SocketAddr`], [`SocketAddrV4`], and
+/// [`SocketAddrV6`].
+///
+/// # Potential causes
+///
+/// `AddrParseError` may be thrown because the provided string does not parse as the given type,
+/// often because it includes information only handled by a different address type.
+///
+/// ```should_panic
+/// use std::net::IpAddr;
+/// let _foo: IpAddr = "127.0.0.1:8080".parse().expect("Cannot handle the socket port");
+/// ```
+///
+/// [`IpAddr`] doesn't handle the port. Use [`SocketAddr`] instead.
+///
+/// ```
+/// use std::net::SocketAddr;
+///
+/// // No problem, the `panic!` message has disappeared.
+/// let _foo: SocketAddr = "127.0.0.1:8080".parse().expect("unreachable panic");
+/// ```
+#[stable(feature = "rust1", since = "1.0.0")]
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct AddrParseError(AddrKind);
+
+#[stable(feature = "addr_parse_error_error", since = "1.4.0")]
+impl fmt::Display for AddrParseError {
+ #[allow(deprecated, deprecated_in_future)]
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ fmt.write_str(self.description())
+ }
+}
+
+#[stable(feature = "addr_parse_error_error", since = "1.4.0")]
+impl Error for AddrParseError {
+ #[allow(deprecated)]
+ fn description(&self) -> &str {
+ match self.0 {
+ AddrKind::Ip => "invalid IP address syntax",
+ AddrKind::Ipv4 => "invalid IPv4 address syntax",
+ AddrKind::Ipv6 => "invalid IPv6 address syntax",
+ AddrKind::Socket => "invalid socket address syntax",
+ AddrKind::SocketV4 => "invalid IPv4 socket address syntax",
+ AddrKind::SocketV6 => "invalid IPv6 socket address syntax",
+ }
+ }
+}
diff --git a/library/core/src/net/socket_addr.rs b/library/core/src/net/socket_addr.rs
new file mode 100644
index 000000000..2d48e2715
--- /dev/null
+++ b/library/core/src/net/socket_addr.rs
@@ -0,0 +1,664 @@
+use crate::cmp::Ordering;
+use crate::fmt::{self, Write};
+use crate::hash;
+use crate::net::{IpAddr, Ipv4Addr, Ipv6Addr};
+
+use super::display_buffer::DisplayBuffer;
+
+/// An internet socket address, either IPv4 or IPv6.
+///
+/// Internet socket addresses consist of an [IP address], a 16-bit port number, as well
+/// as possibly some version-dependent additional information. See [`SocketAddrV4`]'s and
+/// [`SocketAddrV6`]'s respective documentation for more details.
+///
+/// The size of a `SocketAddr` instance may vary depending on the target operating
+/// system.
+///
+/// [IP address]: IpAddr
+///
+/// # Examples
+///
+/// ```
+/// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
+///
+/// let socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
+///
+/// assert_eq!("127.0.0.1:8080".parse(), Ok(socket));
+/// assert_eq!(socket.port(), 8080);
+/// assert_eq!(socket.is_ipv4(), true);
+/// ```
+#[derive(Copy, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]
+#[stable(feature = "rust1", since = "1.0.0")]
+pub enum SocketAddr {
+ /// An IPv4 socket address.
+ #[stable(feature = "rust1", since = "1.0.0")]
+ V4(#[stable(feature = "rust1", since = "1.0.0")] SocketAddrV4),
+ /// An IPv6 socket address.
+ #[stable(feature = "rust1", since = "1.0.0")]
+ V6(#[stable(feature = "rust1", since = "1.0.0")] SocketAddrV6),
+}
+
+/// An IPv4 socket address.
+///
+/// IPv4 socket addresses consist of an [`IPv4` address] and a 16-bit port number, as
+/// stated in [IETF RFC 793].
+///
+/// See [`SocketAddr`] for a type encompassing both IPv4 and IPv6 socket addresses.
+///
+/// The size of a `SocketAddrV4` struct may vary depending on the target operating
+/// system. Do not assume that this type has the same memory layout as the underlying
+/// system representation.
+///
+/// [IETF RFC 793]: https://tools.ietf.org/html/rfc793
+/// [`IPv4` address]: Ipv4Addr
+///
+/// # Examples
+///
+/// ```
+/// use std::net::{Ipv4Addr, SocketAddrV4};
+///
+/// let socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
+///
+/// assert_eq!("127.0.0.1:8080".parse(), Ok(socket));
+/// assert_eq!(socket.ip(), &Ipv4Addr::new(127, 0, 0, 1));
+/// assert_eq!(socket.port(), 8080);
+/// ```
+#[derive(Copy, Clone, Eq, PartialEq)]
+#[stable(feature = "rust1", since = "1.0.0")]
+pub struct SocketAddrV4 {
+ ip: Ipv4Addr,
+ port: u16,
+}
+
+/// An IPv6 socket address.
+///
+/// IPv6 socket addresses consist of an [`IPv6` address], a 16-bit port number, as well
+/// as fields containing the traffic class, the flow label, and a scope identifier
+/// (see [IETF RFC 2553, Section 3.3] for more details).
+///
+/// See [`SocketAddr`] for a type encompassing both IPv4 and IPv6 socket addresses.
+///
+/// The size of a `SocketAddrV6` struct may vary depending on the target operating
+/// system. Do not assume that this type has the same memory layout as the underlying
+/// system representation.
+///
+/// [IETF RFC 2553, Section 3.3]: https://tools.ietf.org/html/rfc2553#section-3.3
+/// [`IPv6` address]: Ipv6Addr
+///
+/// # Examples
+///
+/// ```
+/// use std::net::{Ipv6Addr, SocketAddrV6};
+///
+/// let socket = SocketAddrV6::new(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 1), 8080, 0, 0);
+///
+/// assert_eq!("[2001:db8::1]:8080".parse(), Ok(socket));
+/// assert_eq!(socket.ip(), &Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 1));
+/// assert_eq!(socket.port(), 8080);
+/// ```
+#[derive(Copy, Clone, Eq, PartialEq)]
+#[stable(feature = "rust1", since = "1.0.0")]
+pub struct SocketAddrV6 {
+ ip: Ipv6Addr,
+ port: u16,
+ flowinfo: u32,
+ scope_id: u32,
+}
+
+impl SocketAddr {
+ /// Creates a new socket address from an [IP address] and a port number.
+ ///
+ /// [IP address]: IpAddr
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
+ ///
+ /// let socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
+ /// assert_eq!(socket.ip(), IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)));
+ /// assert_eq!(socket.port(), 8080);
+ /// ```
+ #[stable(feature = "ip_addr", since = "1.7.0")]
+ #[must_use]
+ #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
+ pub const fn new(ip: IpAddr, port: u16) -> SocketAddr {
+ match ip {
+ IpAddr::V4(a) => SocketAddr::V4(SocketAddrV4::new(a, port)),
+ IpAddr::V6(a) => SocketAddr::V6(SocketAddrV6::new(a, port, 0, 0)),
+ }
+ }
+
+ /// Returns the IP address associated with this socket address.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
+ ///
+ /// let socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
+ /// assert_eq!(socket.ip(), IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)));
+ /// ```
+ #[must_use]
+ #[stable(feature = "ip_addr", since = "1.7.0")]
+ #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
+ pub const fn ip(&self) -> IpAddr {
+ match *self {
+ SocketAddr::V4(ref a) => IpAddr::V4(*a.ip()),
+ SocketAddr::V6(ref a) => IpAddr::V6(*a.ip()),
+ }
+ }
+
+ /// Changes the IP address associated with this socket address.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
+ ///
+ /// let mut socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
+ /// socket.set_ip(IpAddr::V4(Ipv4Addr::new(10, 10, 0, 1)));
+ /// assert_eq!(socket.ip(), IpAddr::V4(Ipv4Addr::new(10, 10, 0, 1)));
+ /// ```
+ #[stable(feature = "sockaddr_setters", since = "1.9.0")]
+ pub fn set_ip(&mut self, new_ip: IpAddr) {
+ // `match (*self, new_ip)` would have us mutate a copy of self only to throw it away.
+ match (self, new_ip) {
+ (&mut SocketAddr::V4(ref mut a), IpAddr::V4(new_ip)) => a.set_ip(new_ip),
+ (&mut SocketAddr::V6(ref mut a), IpAddr::V6(new_ip)) => a.set_ip(new_ip),
+ (self_, new_ip) => *self_ = Self::new(new_ip, self_.port()),
+ }
+ }
+
+ /// Returns the port number associated with this socket address.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
+ ///
+ /// let socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
+ /// assert_eq!(socket.port(), 8080);
+ /// ```
+ #[must_use]
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
+ pub const fn port(&self) -> u16 {
+ match *self {
+ SocketAddr::V4(ref a) => a.port(),
+ SocketAddr::V6(ref a) => a.port(),
+ }
+ }
+
+ /// Changes the port number associated with this socket address.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
+ ///
+ /// let mut socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
+ /// socket.set_port(1025);
+ /// assert_eq!(socket.port(), 1025);
+ /// ```
+ #[stable(feature = "sockaddr_setters", since = "1.9.0")]
+ pub fn set_port(&mut self, new_port: u16) {
+ match *self {
+ SocketAddr::V4(ref mut a) => a.set_port(new_port),
+ SocketAddr::V6(ref mut a) => a.set_port(new_port),
+ }
+ }
+
+ /// Returns [`true`] if the [IP address] in this `SocketAddr` is an
+ /// [`IPv4` address], and [`false`] otherwise.
+ ///
+ /// [IP address]: IpAddr
+ /// [`IPv4` address]: IpAddr::V4
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
+ ///
+ /// let socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
+ /// assert_eq!(socket.is_ipv4(), true);
+ /// assert_eq!(socket.is_ipv6(), false);
+ /// ```
+ #[must_use]
+ #[stable(feature = "sockaddr_checker", since = "1.16.0")]
+ #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
+ pub const fn is_ipv4(&self) -> bool {
+ matches!(*self, SocketAddr::V4(_))
+ }
+
+ /// Returns [`true`] if the [IP address] in this `SocketAddr` is an
+ /// [`IPv6` address], and [`false`] otherwise.
+ ///
+ /// [IP address]: IpAddr
+ /// [`IPv6` address]: IpAddr::V6
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::{IpAddr, Ipv6Addr, SocketAddr};
+ ///
+ /// let socket = SocketAddr::new(IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 65535, 0, 1)), 8080);
+ /// assert_eq!(socket.is_ipv4(), false);
+ /// assert_eq!(socket.is_ipv6(), true);
+ /// ```
+ #[must_use]
+ #[stable(feature = "sockaddr_checker", since = "1.16.0")]
+ #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
+ pub const fn is_ipv6(&self) -> bool {
+ matches!(*self, SocketAddr::V6(_))
+ }
+}
+
+impl SocketAddrV4 {
+ /// Creates a new socket address from an [`IPv4` address] and a port number.
+ ///
+ /// [`IPv4` address]: Ipv4Addr
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::{SocketAddrV4, Ipv4Addr};
+ ///
+ /// let socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
+ /// ```
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[must_use]
+ #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
+ pub const fn new(ip: Ipv4Addr, port: u16) -> SocketAddrV4 {
+ SocketAddrV4 { ip, port }
+ }
+
+ /// Returns the IP address associated with this socket address.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::{SocketAddrV4, Ipv4Addr};
+ ///
+ /// let socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
+ /// assert_eq!(socket.ip(), &Ipv4Addr::new(127, 0, 0, 1));
+ /// ```
+ #[must_use]
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
+ pub const fn ip(&self) -> &Ipv4Addr {
+ &self.ip
+ }
+
+ /// Changes the IP address associated with this socket address.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::{SocketAddrV4, Ipv4Addr};
+ ///
+ /// let mut socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
+ /// socket.set_ip(Ipv4Addr::new(192, 168, 0, 1));
+ /// assert_eq!(socket.ip(), &Ipv4Addr::new(192, 168, 0, 1));
+ /// ```
+ #[stable(feature = "sockaddr_setters", since = "1.9.0")]
+ pub fn set_ip(&mut self, new_ip: Ipv4Addr) {
+ self.ip = new_ip;
+ }
+
+ /// Returns the port number associated with this socket address.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::{SocketAddrV4, Ipv4Addr};
+ ///
+ /// let socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
+ /// assert_eq!(socket.port(), 8080);
+ /// ```
+ #[must_use]
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
+ pub const fn port(&self) -> u16 {
+ self.port
+ }
+
+ /// Changes the port number associated with this socket address.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::{SocketAddrV4, Ipv4Addr};
+ ///
+ /// let mut socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
+ /// socket.set_port(4242);
+ /// assert_eq!(socket.port(), 4242);
+ /// ```
+ #[stable(feature = "sockaddr_setters", since = "1.9.0")]
+ pub fn set_port(&mut self, new_port: u16) {
+ self.port = new_port;
+ }
+}
+
+impl SocketAddrV6 {
+ /// Creates a new socket address from an [`IPv6` address], a 16-bit port number,
+ /// and the `flowinfo` and `scope_id` fields.
+ ///
+ /// For more information on the meaning and layout of the `flowinfo` and `scope_id`
+ /// parameters, see [IETF RFC 2553, Section 3.3].
+ ///
+ /// [IETF RFC 2553, Section 3.3]: https://tools.ietf.org/html/rfc2553#section-3.3
+ /// [`IPv6` address]: Ipv6Addr
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::{SocketAddrV6, Ipv6Addr};
+ ///
+ /// let socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 0, 0);
+ /// ```
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[must_use]
+ #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
+ pub const fn new(ip: Ipv6Addr, port: u16, flowinfo: u32, scope_id: u32) -> SocketAddrV6 {
+ SocketAddrV6 { ip, port, flowinfo, scope_id }
+ }
+
+ /// Returns the IP address associated with this socket address.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::{SocketAddrV6, Ipv6Addr};
+ ///
+ /// let socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 0, 0);
+ /// assert_eq!(socket.ip(), &Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1));
+ /// ```
+ #[must_use]
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
+ pub const fn ip(&self) -> &Ipv6Addr {
+ &self.ip
+ }
+
+ /// Changes the IP address associated with this socket address.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::{SocketAddrV6, Ipv6Addr};
+ ///
+ /// let mut socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 0, 0);
+ /// socket.set_ip(Ipv6Addr::new(76, 45, 0, 0, 0, 0, 0, 0));
+ /// assert_eq!(socket.ip(), &Ipv6Addr::new(76, 45, 0, 0, 0, 0, 0, 0));
+ /// ```
+ #[stable(feature = "sockaddr_setters", since = "1.9.0")]
+ pub fn set_ip(&mut self, new_ip: Ipv6Addr) {
+ self.ip = new_ip;
+ }
+
+ /// Returns the port number associated with this socket address.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::{SocketAddrV6, Ipv6Addr};
+ ///
+ /// let socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 0, 0);
+ /// assert_eq!(socket.port(), 8080);
+ /// ```
+ #[must_use]
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
+ pub const fn port(&self) -> u16 {
+ self.port
+ }
+
+ /// Changes the port number associated with this socket address.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::{SocketAddrV6, Ipv6Addr};
+ ///
+ /// let mut socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 0, 0);
+ /// socket.set_port(4242);
+ /// assert_eq!(socket.port(), 4242);
+ /// ```
+ #[stable(feature = "sockaddr_setters", since = "1.9.0")]
+ pub fn set_port(&mut self, new_port: u16) {
+ self.port = new_port;
+ }
+
+ /// Returns the flow information associated with this address.
+ ///
+ /// This information corresponds to the `sin6_flowinfo` field in C's `netinet/in.h`,
+ /// as specified in [IETF RFC 2553, Section 3.3].
+ /// It combines information about the flow label and the traffic class as specified
+ /// in [IETF RFC 2460], respectively [Section 6] and [Section 7].
+ ///
+ /// [IETF RFC 2553, Section 3.3]: https://tools.ietf.org/html/rfc2553#section-3.3
+ /// [IETF RFC 2460]: https://tools.ietf.org/html/rfc2460
+ /// [Section 6]: https://tools.ietf.org/html/rfc2460#section-6
+ /// [Section 7]: https://tools.ietf.org/html/rfc2460#section-7
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::{SocketAddrV6, Ipv6Addr};
+ ///
+ /// let socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 10, 0);
+ /// assert_eq!(socket.flowinfo(), 10);
+ /// ```
+ #[must_use]
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
+ pub const fn flowinfo(&self) -> u32 {
+ self.flowinfo
+ }
+
+ /// Changes the flow information associated with this socket address.
+ ///
+ /// See [`SocketAddrV6::flowinfo`]'s documentation for more details.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::{SocketAddrV6, Ipv6Addr};
+ ///
+ /// let mut socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 10, 0);
+ /// socket.set_flowinfo(56);
+ /// assert_eq!(socket.flowinfo(), 56);
+ /// ```
+ #[stable(feature = "sockaddr_setters", since = "1.9.0")]
+ pub fn set_flowinfo(&mut self, new_flowinfo: u32) {
+ self.flowinfo = new_flowinfo;
+ }
+
+ /// Returns the scope ID associated with this address.
+ ///
+ /// This information corresponds to the `sin6_scope_id` field in C's `netinet/in.h`,
+ /// as specified in [IETF RFC 2553, Section 3.3].
+ ///
+ /// [IETF RFC 2553, Section 3.3]: https://tools.ietf.org/html/rfc2553#section-3.3
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::{SocketAddrV6, Ipv6Addr};
+ ///
+ /// let socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 0, 78);
+ /// assert_eq!(socket.scope_id(), 78);
+ /// ```
+ #[must_use]
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
+ pub const fn scope_id(&self) -> u32 {
+ self.scope_id
+ }
+
+ /// Changes the scope ID associated with this socket address.
+ ///
+ /// See [`SocketAddrV6::scope_id`]'s documentation for more details.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::net::{SocketAddrV6, Ipv6Addr};
+ ///
+ /// let mut socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 0, 78);
+ /// socket.set_scope_id(42);
+ /// assert_eq!(socket.scope_id(), 42);
+ /// ```
+ #[stable(feature = "sockaddr_setters", since = "1.9.0")]
+ pub fn set_scope_id(&mut self, new_scope_id: u32) {
+ self.scope_id = new_scope_id;
+ }
+}
+
+#[stable(feature = "ip_from_ip", since = "1.16.0")]
+impl From<SocketAddrV4> for SocketAddr {
+ /// Converts a [`SocketAddrV4`] into a [`SocketAddr::V4`].
+ fn from(sock4: SocketAddrV4) -> SocketAddr {
+ SocketAddr::V4(sock4)
+ }
+}
+
+#[stable(feature = "ip_from_ip", since = "1.16.0")]
+impl From<SocketAddrV6> for SocketAddr {
+ /// Converts a [`SocketAddrV6`] into a [`SocketAddr::V6`].
+ fn from(sock6: SocketAddrV6) -> SocketAddr {
+ SocketAddr::V6(sock6)
+ }
+}
+
+#[stable(feature = "addr_from_into_ip", since = "1.17.0")]
+impl<I: Into<IpAddr>> From<(I, u16)> for SocketAddr {
+ /// Converts a tuple struct (Into<[`IpAddr`]>, `u16`) into a [`SocketAddr`].
+ ///
+ /// This conversion creates a [`SocketAddr::V4`] for an [`IpAddr::V4`]
+ /// and creates a [`SocketAddr::V6`] for an [`IpAddr::V6`].
+ ///
+ /// `u16` is treated as port of the newly created [`SocketAddr`].
+ fn from(pieces: (I, u16)) -> SocketAddr {
+ SocketAddr::new(pieces.0.into(), pieces.1)
+ }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl fmt::Display for SocketAddr {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ match *self {
+ SocketAddr::V4(ref a) => a.fmt(f),
+ SocketAddr::V6(ref a) => a.fmt(f),
+ }
+ }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl fmt::Debug for SocketAddr {
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ fmt::Display::fmt(self, fmt)
+ }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl fmt::Display for SocketAddrV4 {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ // If there are no alignment requirements, write the socket address directly to `f`.
+ // Otherwise, write it to a local buffer and then use `f.pad`.
+ if f.precision().is_none() && f.width().is_none() {
+ write!(f, "{}:{}", self.ip(), self.port())
+ } else {
+ const LONGEST_IPV4_SOCKET_ADDR: &str = "255.255.255.255:65536";
+
+ let mut buf = DisplayBuffer::<{ LONGEST_IPV4_SOCKET_ADDR.len() }>::new();
+ // Buffer is long enough for the longest possible IPv4 socket address, so this should never fail.
+ write!(buf, "{}:{}", self.ip(), self.port()).unwrap();
+
+ f.pad(buf.as_str())
+ }
+ }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl fmt::Debug for SocketAddrV4 {
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ fmt::Display::fmt(self, fmt)
+ }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl fmt::Display for SocketAddrV6 {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ // If there are no alignment requirements, write the socket address directly to `f`.
+ // Otherwise, write it to a local buffer and then use `f.pad`.
+ if f.precision().is_none() && f.width().is_none() {
+ match self.scope_id() {
+ 0 => write!(f, "[{}]:{}", self.ip(), self.port()),
+ scope_id => write!(f, "[{}%{}]:{}", self.ip(), scope_id, self.port()),
+ }
+ } else {
+ const LONGEST_IPV6_SOCKET_ADDR: &str =
+ "[ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff%4294967296]:65536";
+
+ let mut buf = DisplayBuffer::<{ LONGEST_IPV6_SOCKET_ADDR.len() }>::new();
+ match self.scope_id() {
+ 0 => write!(buf, "[{}]:{}", self.ip(), self.port()),
+ scope_id => write!(buf, "[{}%{}]:{}", self.ip(), scope_id, self.port()),
+ }
+ // Buffer is long enough for the longest possible IPv6 socket address, so this should never fail.
+ .unwrap();
+
+ f.pad(buf.as_str())
+ }
+ }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl fmt::Debug for SocketAddrV6 {
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ fmt::Display::fmt(self, fmt)
+ }
+}
+
+#[stable(feature = "socketaddr_ordering", since = "1.45.0")]
+impl PartialOrd for SocketAddrV4 {
+ fn partial_cmp(&self, other: &SocketAddrV4) -> Option<Ordering> {
+ Some(self.cmp(other))
+ }
+}
+
+#[stable(feature = "socketaddr_ordering", since = "1.45.0")]
+impl PartialOrd for SocketAddrV6 {
+ fn partial_cmp(&self, other: &SocketAddrV6) -> Option<Ordering> {
+ Some(self.cmp(other))
+ }
+}
+
+#[stable(feature = "socketaddr_ordering", since = "1.45.0")]
+impl Ord for SocketAddrV4 {
+ fn cmp(&self, other: &SocketAddrV4) -> Ordering {
+ self.ip().cmp(other.ip()).then(self.port().cmp(&other.port()))
+ }
+}
+
+#[stable(feature = "socketaddr_ordering", since = "1.45.0")]
+impl Ord for SocketAddrV6 {
+ fn cmp(&self, other: &SocketAddrV6) -> Ordering {
+ self.ip().cmp(other.ip()).then(self.port().cmp(&other.port()))
+ }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl hash::Hash for SocketAddrV4 {
+ fn hash<H: hash::Hasher>(&self, s: &mut H) {
+ (self.port, self.ip).hash(s)
+ }
+}
+#[stable(feature = "rust1", since = "1.0.0")]
+impl hash::Hash for SocketAddrV6 {
+ fn hash<H: hash::Hasher>(&self, s: &mut H) {
+ (self.port, &self.ip, self.flowinfo, self.scope_id).hash(s)
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-07 10:08:23 +0000