Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

9 files changed, 4266 insertions, 0 deletions

diff --git a/vendor/rustix/src/net/addr.rs b/vendor/rustix/src/net/addr.rs
new file mode 100644
index 000000000..59f4a55d7
--- /dev/null
+++ b/vendor/rustix/src/net/addr.rs
@@ -0,0 +1,759 @@
+//! The following is derived from Rust's
+//! library/std/src/net/addr.rs at revision
+//! dca3f1b786efd27be3b325ed1e01e247aa589c3b.
+//!
+//! This defines `SocketAddr`, `SocketAddrV4`, and `SocketAddrV6`. These are
+//! conceptually platform-independent, however in practice OS's have differing
+//! representations.
+
+#![allow(unsafe_code)]
+
+use crate::imp::c;
+use crate::imp::net::ext::{
+    in6_addr_s6_addr, in_addr_s_addr, sockaddr_in6_new, sockaddr_in6_sin6_scope_id,
+    sockaddr_in6_sin6_scope_id_mut,
+};
+use crate::net::ip::{IpAddr, Ipv4Addr, Ipv6Addr};
+use core::cmp::Ordering;
+use core::hash;
+use core::mem;
+
+/// 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)]
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+pub enum SocketAddr {
+    /// An IPv4 socket address.
+    #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+    V4(#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))] SocketAddrV4),
+    /// An IPv6 socket address.
+    #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+    V6(#[cfg_attr(staged_api, 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)]
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+pub struct SocketAddrV4 {
+    // Do not assume that this struct is implemented as the underlying system representation.
+    // The memory layout is not part of the stable interface that std exposes.
+    pub(crate) inner: c::sockaddr_in,
+}
+
+/// 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)]
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+pub struct SocketAddrV6 {
+    // Do not assume that this struct is implemented as the underlying system representation.
+    // The memory layout is not part of the stable interface that std exposes.
+    pub(crate) inner: c::sockaddr_in6,
+}
+
+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);
+    /// ```
+    #[cfg_attr(staged_api, stable(feature = "ip_addr", since = "1.7.0"))]
+    #[must_use]
+    pub 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)));
+    /// ```
+    #[cfg(const_raw_ptr_deref)]
+    #[must_use]
+    #[cfg_attr(staged_api, stable(feature = "ip_addr", since = "1.7.0"))]
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_socketaddr", issue = "82485")
+    )]
+    pub const fn ip(&self) -> IpAddr {
+        match *self {
+            SocketAddr::V4(ref a) => IpAddr::V4(*a.ip()),
+            SocketAddr::V6(ref a) => IpAddr::V6(*a.ip()),
+        }
+    }
+
+    /// 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)));
+    /// ```
+    #[cfg(not(const_raw_ptr_deref))]
+    #[must_use]
+    #[cfg_attr(staged_api, stable(feature = "ip_addr", since = "1.7.0"))]
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_socketaddr", issue = "82485")
+    )]
+    pub 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)));
+    /// ```
+    #[cfg_attr(staged_api, 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]
+    #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_socketaddr", issue = "82485")
+    )]
+    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);
+    /// ```
+    #[cfg_attr(staged_api, 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]
+    #[cfg_attr(staged_api, stable(feature = "sockaddr_checker", since = "1.16.0"))]
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_socketaddr", issue = "82485")
+    )]
+    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]
+    #[cfg_attr(staged_api, stable(feature = "sockaddr_checker", since = "1.16.0"))]
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_socketaddr", issue = "82485")
+    )]
+    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);
+    /// ```
+    #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+    #[must_use]
+    pub fn new(ip: Ipv4Addr, port: u16) -> SocketAddrV4 {
+        SocketAddrV4 {
+            inner: c::sockaddr_in {
+                sin_family: c::AF_INET as c::sa_family_t,
+                sin_port: port.to_be(),
+                sin_addr: ip.inner,
+                ..unsafe { mem::zeroed() }
+            },
+        }
+    }
+
+    /// 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));
+    /// ```
+    #[cfg(const_raw_ptr_deref)]
+    #[must_use]
+    #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_socketaddr", issue = "82485")
+    )]
+    pub const fn ip(&self) -> &Ipv4Addr {
+        // SAFETY: `Ipv4Addr` is `#[repr(C)] struct { _: in_addr; }`.
+        // It is safe to cast from `&in_addr` to `&Ipv4Addr`.
+        unsafe { &*(&self.inner.sin_addr as *const c::in_addr as *const Ipv4Addr) }
+    }
+
+    /// 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));
+    /// ```
+    #[cfg(not(const_raw_ptr_deref))]
+    #[must_use]
+    #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_socketaddr", issue = "82485")
+    )]
+    pub fn ip(&self) -> &Ipv4Addr {
+        // SAFETY: `Ipv4Addr` is `#[repr(C)] struct { _: in_addr; }`.
+        // It is safe to cast from `&in_addr` to `&Ipv4Addr`.
+        unsafe { &*(&self.inner.sin_addr as *const c::in_addr as *const Ipv4Addr) }
+    }
+
+    /// 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));
+    /// ```
+    #[cfg_attr(staged_api, stable(feature = "sockaddr_setters", since = "1.9.0"))]
+    pub fn set_ip(&mut self, new_ip: Ipv4Addr) {
+        self.inner.sin_addr = new_ip.inner
+    }
+
+    /// 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]
+    #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_socketaddr", issue = "82485")
+    )]
+    pub const fn port(&self) -> u16 {
+        u16::from_be(self.inner.sin_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);
+    /// ```
+    #[cfg_attr(staged_api, stable(feature = "sockaddr_setters", since = "1.9.0"))]
+    pub fn set_port(&mut self, new_port: u16) {
+        self.inner.sin_port = new_port.to_be();
+    }
+}
+
+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);
+    /// ```
+    #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+    #[must_use]
+    pub fn new(ip: Ipv6Addr, port: u16, flowinfo: u32, scope_id: u32) -> SocketAddrV6 {
+        SocketAddrV6 {
+            inner: sockaddr_in6_new(
+                c::AF_INET6 as c::sa_family_t,
+                port.to_be(),
+                flowinfo,
+                ip.inner,
+                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));
+    /// ```
+    #[cfg(const_raw_ptr_deref)]
+    #[must_use]
+    #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_socketaddr", issue = "82485")
+    )]
+    pub const fn ip(&self) -> &Ipv6Addr {
+        unsafe { &*(&self.inner.sin6_addr as *const c::in6_addr as *const Ipv6Addr) }
+    }
+
+    /// 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));
+    /// ```
+    #[cfg(not(const_raw_ptr_deref))]
+    #[must_use]
+    #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_socketaddr", issue = "82485")
+    )]
+    pub fn ip(&self) -> &Ipv6Addr {
+        unsafe { &*(&self.inner.sin6_addr as *const c::in6_addr as *const Ipv6Addr) }
+    }
+
+    /// 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));
+    /// ```
+    #[cfg_attr(staged_api, stable(feature = "sockaddr_setters", since = "1.9.0"))]
+    pub fn set_ip(&mut self, new_ip: Ipv6Addr) {
+        self.inner.sin6_addr = new_ip.inner
+    }
+
+    /// 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]
+    #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_socketaddr", issue = "82485")
+    )]
+    pub const fn port(&self) -> u16 {
+        u16::from_be(self.inner.sin6_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);
+    /// ```
+    #[cfg_attr(staged_api, stable(feature = "sockaddr_setters", since = "1.9.0"))]
+    pub fn set_port(&mut self, new_port: u16) {
+        self.inner.sin6_port = new_port.to_be();
+    }
+
+    /// 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]
+    #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_socketaddr", issue = "82485")
+    )]
+    pub const fn flowinfo(&self) -> u32 {
+        self.inner.sin6_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);
+    /// ```
+    #[cfg_attr(staged_api, stable(feature = "sockaddr_setters", since = "1.9.0"))]
+    pub fn set_flowinfo(&mut self, new_flowinfo: u32) {
+        self.inner.sin6_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]
+    #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_socketaddr", issue = "82485")
+    )]
+    pub const fn scope_id(&self) -> u32 {
+        sockaddr_in6_sin6_scope_id(self.inner)
+    }
+
+    /// 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);
+    /// ```
+    #[cfg_attr(staged_api, stable(feature = "sockaddr_setters", since = "1.9.0"))]
+    pub fn set_scope_id(&mut self, new_scope_id: u32) {
+        *sockaddr_in6_sin6_scope_id_mut(&mut self.inner) = new_scope_id;
+    }
+}
+
+#[cfg_attr(staged_api, 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)
+    }
+}
+
+#[cfg_attr(staged_api, 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)
+    }
+}
+
+#[cfg_attr(staged_api, 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)
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+impl Clone for SocketAddrV4 {
+    fn clone(&self) -> SocketAddrV4 {
+        *self
+    }
+}
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+impl Clone for SocketAddrV6 {
+    fn clone(&self) -> SocketAddrV6 {
+        *self
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+impl PartialEq for SocketAddrV4 {
+    fn eq(&self, other: &SocketAddrV4) -> bool {
+        self.inner.sin_port == other.inner.sin_port
+            && in_addr_s_addr(self.inner.sin_addr) == in_addr_s_addr(other.inner.sin_addr)
+    }
+}
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+impl PartialEq for SocketAddrV6 {
+    fn eq(&self, other: &SocketAddrV6) -> bool {
+        self.inner.sin6_port == other.inner.sin6_port
+            && in6_addr_s6_addr(self.inner.sin6_addr) == in6_addr_s6_addr(self.inner.sin6_addr)
+            && self.inner.sin6_flowinfo == other.inner.sin6_flowinfo
+            && sockaddr_in6_sin6_scope_id(self.inner) == sockaddr_in6_sin6_scope_id(other.inner)
+    }
+}
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+impl Eq for SocketAddrV4 {}
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+impl Eq for SocketAddrV6 {}
+
+#[cfg_attr(staged_api, stable(feature = "socketaddr_ordering", since = "1.45.0"))]
+impl PartialOrd for SocketAddrV4 {
+    fn partial_cmp(&self, other: &SocketAddrV4) -> Option<Ordering> {
+        Some(self.cmp(other))
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "socketaddr_ordering", since = "1.45.0"))]
+impl PartialOrd for SocketAddrV6 {
+    fn partial_cmp(&self, other: &SocketAddrV6) -> Option<Ordering> {
+        Some(self.cmp(other))
+    }
+}
+
+#[cfg_attr(staged_api, 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()))
+    }
+}
+
+#[cfg_attr(staged_api, 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()))
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+impl hash::Hash for SocketAddrV4 {
+    fn hash<H: hash::Hasher>(&self, s: &mut H) {
+        (self.inner.sin_port, in_addr_s_addr(self.inner.sin_addr)).hash(s)
+    }
+}
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+impl hash::Hash for SocketAddrV6 {
+    fn hash<H: hash::Hasher>(&self, s: &mut H) {
+        (
+            self.inner.sin6_port,
+            &in6_addr_s6_addr(self.inner.sin6_addr),
+            self.inner.sin6_flowinfo,
+            sockaddr_in6_sin6_scope_id(self.inner),
+        )
+            .hash(s)
+    }
+}
diff --git a/vendor/rustix/src/net/ip.rs b/vendor/rustix/src/net/ip.rs
new file mode 100644
index 000000000..7c587cc7a
--- /dev/null
+++ b/vendor/rustix/src/net/ip.rs
@@ -0,0 +1,2059 @@
+//! The following is derived from Rust's
+//! library/std/src/net/ip.rs at revision
+//! dca3f1b786efd27be3b325ed1e01e247aa589c3b.
+//!
+//! This defines `IpAddr`, `Ipv4Addr`, and `Ipv6Addr`. Ideally, these should be
+//! defined in `core`. See [RFC 2832].
+//!
+//! [RFC 2832]: https://github.com/rust-lang/rfcs/pull/2832
+
+#![allow(unsafe_code)]
+
+use crate::imp::c;
+use crate::imp::net::ext::{in6_addr_new, in6_addr_s6_addr, in_addr_new, in_addr_s_addr};
+use core::cmp::Ordering;
+use core::hash;
+use core::mem::transmute;
+
+/// An IP address, either IPv4 or IPv6.
+///
+/// This enum can contain either an [`Ipv4Addr`] or an [`Ipv6Addr`], see their
+/// respective documentation for more details.
+///
+/// The size of an `IpAddr` instance may vary depending on the target operating
+/// system.
+///
+/// # Examples
+///
+/// ```
+/// use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
+///
+/// let localhost_v4 = IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1));
+/// let localhost_v6 = IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1));
+///
+/// assert_eq!("127.0.0.1".parse(), Ok(localhost_v4));
+/// assert_eq!("::1".parse(), Ok(localhost_v6));
+///
+/// assert_eq!(localhost_v4.is_ipv6(), false);
+/// assert_eq!(localhost_v4.is_ipv4(), true);
+/// ```
+#[cfg_attr(staged_api, stable(feature = "ip_addr", since = "1.7.0"))]
+#[derive(Copy, Clone, Eq, PartialEq, Hash, PartialOrd, Ord)]
+pub enum IpAddr {
+    /// An IPv4 address.
+    #[cfg_attr(staged_api, stable(feature = "ip_addr", since = "1.7.0"))]
+    V4(#[cfg_attr(staged_api, stable(feature = "ip_addr", since = "1.7.0"))] Ipv4Addr),
+    /// An IPv6 address.
+    #[cfg_attr(staged_api, stable(feature = "ip_addr", since = "1.7.0"))]
+    V6(#[cfg_attr(staged_api, stable(feature = "ip_addr", since = "1.7.0"))] Ipv6Addr),
+}
+
+/// An IPv4 address.
+///
+/// IPv4 addresses are defined as 32-bit integers in [IETF RFC 791].
+/// They are usually represented as four octets.
+///
+/// See [`IpAddr`] for a type encompassing both IPv4 and IPv6 addresses.
+///
+/// The size of an `Ipv4Addr` struct may vary depending on the target operating
+/// system.
+///
+/// [IETF RFC 791]: https://tools.ietf.org/html/rfc791
+///
+/// # Textual representation
+///
+/// `Ipv4Addr` provides a [`FromStr`] implementation. The four octets are in decimal
+/// notation, divided by `.` (this is called "dot-decimal notation").
+/// Notably, octal numbers (which are indicated with a leading `0`) and hexadecimal numbers (which
+/// are indicated with a leading `0x`) are not allowed per [IETF RFC 6943].
+///
+/// [IETF RFC 6943]: https://tools.ietf.org/html/rfc6943#section-3.1.1
+/// [`FromStr`]: core::str::FromStr
+///
+/// # Examples
+///
+/// ```
+/// use std::net::Ipv4Addr;
+///
+/// let localhost = Ipv4Addr::new(127, 0, 0, 1);
+/// assert_eq!("127.0.0.1".parse(), Ok(localhost));
+/// assert_eq!(localhost.is_loopback(), true);
+/// assert!("012.004.002.000".parse::<Ipv4Addr>().is_err()); // all octets are in octal
+/// assert!("0000000.0.0.0".parse::<Ipv4Addr>().is_err()); // first octet is a zero in octal
+/// assert!("0xcb.0x0.0x71.0x00".parse::<Ipv4Addr>().is_err()); // all octets are in hex
+/// ```
+#[derive(Copy)]
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+pub struct Ipv4Addr {
+    pub(crate) inner: c::in_addr,
+}
+
+/// An IPv6 address.
+///
+/// IPv6 addresses are defined as 128-bit integers in [IETF RFC 4291].
+/// They are usually represented as eight 16-bit segments.
+///
+/// The size of an `Ipv6Addr` struct may vary depending on the target operating
+/// system.
+///
+/// [IETF RFC 4291]: https://tools.ietf.org/html/rfc4291
+///
+/// # Embedding IPv4 Addresses
+///
+/// See [`IpAddr`] for a type encompassing both IPv4 and IPv6 addresses.
+///
+/// To assist in the transition from IPv4 to IPv6 two types of IPv6 addresses that embed an IPv4 address were defined:
+/// IPv4-compatible and IPv4-mapped addresses. Of these IPv4-compatible addresses have been officially deprecated.
+///
+/// Both types of addresses are not assigned any special meaning by this implementation,
+/// other than what the relevant standards prescribe. This means that an address like `::ffff:127.0.0.1`,
+/// while representing an IPv4 loopback address, is not itself an IPv6 loopback address; only `::1` is.
+/// To handle these so called "IPv4-in-IPv6" addresses, they have to first be converted to their canonical IPv4 address.
+///
+/// ### IPv4-Compatible IPv6 Addresses
+///
+/// IPv4-compatible IPv6 addresses are defined in [IETF RFC 4291 Section 2.5.5.1], and have been officially deprecated.
+/// The RFC describes the format of an "IPv4-Compatible IPv6 address" as follows:
+///
+/// ```text
+/// |                80 bits               | 16 |      32 bits        |
+/// +--------------------------------------+--------------------------+
+/// |0000..............................0000|0000|    IPv4 address     |
+/// +--------------------------------------+----+---------------------+
+/// ```
+/// So `::a.b.c.d` would be an IPv4-compatible IPv6 address representing the IPv4 address `a.b.c.d`.
+///
+/// To convert from an IPv4 address to an IPv4-compatible IPv6 address, use [`Ipv4Addr::to_ipv6_compatible`].
+/// Use [`Ipv6Addr::to_ipv4`] to convert an IPv4-compatible IPv6 address to the canonical IPv4 address.
+///
+/// [IETF RFC 4291 Section 2.5.5.1]: https://datatracker.ietf.org/doc/html/rfc4291#section-2.5.5.1
+///
+/// ### IPv4-Mapped IPv6 Addresses
+///
+/// IPv4-mapped IPv6 addresses are defined in [IETF RFC 4291 Section 2.5.5.2].
+/// The RFC describes the format of an "IPv4-Mapped IPv6 address" as follows:
+///
+/// ```text
+/// |                80 bits               | 16 |      32 bits        |
+/// +--------------------------------------+--------------------------+
+/// |0000..............................0000|FFFF|    IPv4 address     |
+/// +--------------------------------------+----+---------------------+
+/// ```
+/// So `::ffff:a.b.c.d` would be an IPv4-mapped IPv6 address representing the IPv4 address `a.b.c.d`.
+///
+/// To convert from an IPv4 address to an IPv4-mapped IPv6 address, use [`Ipv4Addr::to_ipv6_mapped`].
+/// Use [`Ipv6Addr::to_ipv4`] to convert an IPv4-mapped IPv6 address to the canonical IPv4 address.
+///
+/// [IETF RFC 4291 Section 2.5.5.2]: https://datatracker.ietf.org/doc/html/rfc4291#section-2.5.5.2
+///
+/// # Textual representation
+///
+/// `Ipv6Addr` provides a [`FromStr`] implementation. There are many ways to represent
+/// an IPv6 address in text, but in general, each segments is written in hexadecimal
+/// notation, and segments are separated by `:`. For more information, see
+/// [IETF RFC 5952].
+///
+/// [`FromStr`]: core::str::FromStr
+/// [IETF RFC 5952]: https://tools.ietf.org/html/rfc5952
+///
+/// # Examples
+///
+/// ```
+/// use std::net::Ipv6Addr;
+///
+/// let localhost = Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1);
+/// assert_eq!("::1".parse(), Ok(localhost));
+/// assert_eq!(localhost.is_loopback(), true);
+/// ```
+#[derive(Copy)]
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+pub struct Ipv6Addr {
+    pub(crate) inner: c::in6_addr,
+}
+
+/// Scope of an [IPv6 multicast address] as defined in [IETF RFC 7346 section 2].
+///
+/// # Stability Guarantees
+///
+/// Not all possible values for a multicast scope have been assigned.
+/// Future RFCs may introduce new scopes, which will be added as variants to this enum;
+/// because of this the enum is marked as `#[non_exhaustive]`.
+///
+/// # Examples
+/// ```
+/// #![feature(ip)]
+///
+/// use std::net::Ipv6Addr;
+/// use std::net::Ipv6MulticastScope::*;
+///
+/// // An IPv6 multicast address with global scope (`ff0e::`).
+/// let address = Ipv6Addr::new(0xff0e, 0, 0, 0, 0, 0, 0, 0);
+///
+/// // Will print "Global scope".
+/// match address.multicast_scope() {
+///     Some(InterfaceLocal) => println!("Interface-Local scope"),
+///     Some(LinkLocal) => println!("Link-Local scope"),
+///     Some(RealmLocal) => println!("Realm-Local scope"),
+///     Some(AdminLocal) => println!("Admin-Local scope"),
+///     Some(SiteLocal) => println!("Site-Local scope"),
+///     Some(OrganizationLocal) => println!("Organization-Local scope"),
+///     Some(Global) => println!("Global scope"),
+///     Some(_) => println!("Unknown scope"),
+///     None => println!("Not a multicast address!")
+/// }
+///
+/// ```
+///
+/// [IPv6 multicast address]: Ipv6Addr
+/// [IETF RFC 7346 section 2]: https://tools.ietf.org/html/rfc7346#section-2
+#[derive(Copy, PartialEq, Eq, Clone, Hash, Debug)]
+#[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))]
+#[non_exhaustive]
+pub enum Ipv6MulticastScope {
+    /// Interface-Local scope.
+    InterfaceLocal,
+    /// Link-Local scope.
+    LinkLocal,
+    /// Realm-Local scope.
+    RealmLocal,
+    /// Admin-Local scope.
+    AdminLocal,
+    /// Site-Local scope.
+    SiteLocal,
+    /// Organization-Local scope.
+    OrganizationLocal,
+    /// Global scope.
+    Global,
+}
+
+impl IpAddr {
+    /// Returns [`true`] for the special 'unspecified' address.
+    ///
+    /// See the documentation for [`Ipv4Addr::is_unspecified()`] and
+    /// [`Ipv6Addr::is_unspecified()`] for more details.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
+    ///
+    /// assert_eq!(IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0)).is_unspecified(), true);
+    /// assert_eq!(IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0)).is_unspecified(), true);
+    /// ```
+    #[cfg_attr(staged_api, rustc_const_stable(feature = "const_ip", since = "1.50.0"))]
+    #[cfg_attr(staged_api, stable(feature = "ip_shared", since = "1.12.0"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_unspecified(&self) -> bool {
+        match self {
+            IpAddr::V4(ip) => ip.is_unspecified(),
+            IpAddr::V6(ip) => ip.is_unspecified(),
+        }
+    }
+
+    /// Returns [`true`] if this is a loopback address.
+    ///
+    /// See the documentation for [`Ipv4Addr::is_loopback()`] and
+    /// [`Ipv6Addr::is_loopback()`] for more details.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
+    ///
+    /// assert_eq!(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)).is_loopback(), true);
+    /// assert_eq!(IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0x1)).is_loopback(), true);
+    /// ```
+    #[cfg_attr(staged_api, rustc_const_stable(feature = "const_ip", since = "1.50.0"))]
+    #[cfg_attr(staged_api, stable(feature = "ip_shared", since = "1.12.0"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_loopback(&self) -> bool {
+        match self {
+            IpAddr::V4(ip) => ip.is_loopback(),
+            IpAddr::V6(ip) => ip.is_loopback(),
+        }
+    }
+
+    /// Returns [`true`] if the address appears to be globally routable.
+    ///
+    /// See the documentation for [`Ipv4Addr::is_global()`] and
+    /// [`Ipv6Addr::is_global()`] for more details.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(ip)]
+    ///
+    /// use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
+    ///
+    /// assert_eq!(IpAddr::V4(Ipv4Addr::new(80, 9, 12, 3)).is_global(), true);
+    /// assert_eq!(IpAddr::V6(Ipv6Addr::new(0, 0, 0x1c9, 0, 0, 0xafc8, 0, 0x1)).is_global(), true);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_ip", issue = "76205")
+    )]
+    #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_global(&self) -> bool {
+        match self {
+            IpAddr::V4(ip) => ip.is_global(),
+            IpAddr::V6(ip) => ip.is_global(),
+        }
+    }
+
+    /// Returns [`true`] if this is a multicast address.
+    ///
+    /// See the documentation for [`Ipv4Addr::is_multicast()`] and
+    /// [`Ipv6Addr::is_multicast()`] for more details.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
+    ///
+    /// assert_eq!(IpAddr::V4(Ipv4Addr::new(224, 254, 0, 0)).is_multicast(), true);
+    /// assert_eq!(IpAddr::V6(Ipv6Addr::new(0xff00, 0, 0, 0, 0, 0, 0, 0)).is_multicast(), true);
+    /// ```
+    #[cfg_attr(staged_api, rustc_const_stable(feature = "const_ip", since = "1.50.0"))]
+    #[cfg_attr(staged_api, stable(feature = "ip_shared", since = "1.12.0"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_multicast(&self) -> bool {
+        match self {
+            IpAddr::V4(ip) => ip.is_multicast(),
+            IpAddr::V6(ip) => ip.is_multicast(),
+        }
+    }
+
+    /// Returns [`true`] if this address is in a range designated for documentation.
+    ///
+    /// See the documentation for [`Ipv4Addr::is_documentation()`] and
+    /// [`Ipv6Addr::is_documentation()`] for more details.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(ip)]
+    ///
+    /// use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
+    ///
+    /// assert_eq!(IpAddr::V4(Ipv4Addr::new(203, 0, 113, 6)).is_documentation(), true);
+    /// assert_eq!(
+    ///     IpAddr::V6(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 0)).is_documentation(),
+    ///     true
+    /// );
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_ip", issue = "76205")
+    )]
+    #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_documentation(&self) -> bool {
+        match self {
+            IpAddr::V4(ip) => ip.is_documentation(),
+            IpAddr::V6(ip) => ip.is_documentation(),
+        }
+    }
+
+    /// Returns [`true`] if this address is in a range designated for benchmarking.
+    ///
+    /// See the documentation for [`Ipv4Addr::is_benchmarking()`] and
+    /// [`Ipv6Addr::is_benchmarking()`] for more details.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(ip)]
+    ///
+    /// use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
+    ///
+    /// assert_eq!(IpAddr::V4(Ipv4Addr::new(198, 19, 255, 255)).is_benchmarking(), true);
+    /// assert_eq!(IpAddr::V6(Ipv6Addr::new(0x2001, 0x2, 0, 0, 0, 0, 0, 0)).is_benchmarking(), true);
+    /// ```
+    #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_benchmarking(&self) -> bool {
+        match self {
+            IpAddr::V4(ip) => ip.is_benchmarking(),
+            IpAddr::V6(ip) => ip.is_benchmarking(),
+        }
+    }
+
+    /// Returns [`true`] if this address is an [`IPv4` address], and [`false`]
+    /// otherwise.
+    ///
+    /// [`IPv4` address]: IpAddr::V4
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
+    ///
+    /// assert_eq!(IpAddr::V4(Ipv4Addr::new(203, 0, 113, 6)).is_ipv4(), true);
+    /// assert_eq!(IpAddr::V6(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 0)).is_ipv4(), false);
+    /// ```
+    #[cfg_attr(staged_api, rustc_const_stable(feature = "const_ip", since = "1.50.0"))]
+    #[cfg_attr(staged_api, stable(feature = "ipaddr_checker", since = "1.16.0"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_ipv4(&self) -> bool {
+        matches!(self, IpAddr::V4(_))
+    }
+
+    /// Returns [`true`] if this address is an [`IPv6` address], and [`false`]
+    /// otherwise.
+    ///
+    /// [`IPv6` address]: IpAddr::V6
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
+    ///
+    /// assert_eq!(IpAddr::V4(Ipv4Addr::new(203, 0, 113, 6)).is_ipv6(), false);
+    /// assert_eq!(IpAddr::V6(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 0)).is_ipv6(), true);
+    /// ```
+    #[cfg_attr(staged_api, rustc_const_stable(feature = "const_ip", since = "1.50.0"))]
+    #[cfg_attr(staged_api, stable(feature = "ipaddr_checker", since = "1.16.0"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_ipv6(&self) -> bool {
+        matches!(self, IpAddr::V6(_))
+    }
+
+    /// Converts this address to an `IpAddr::V4` if it is an IPv4-mapped IPv6 addresses, otherwise it
+    /// return `self` as-is.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(ip)]
+    /// use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
+    ///
+    /// assert_eq!(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)).to_canonical().is_loopback(), true);
+    /// assert_eq!(IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0x7f00, 0x1)).is_loopback(), false);
+    /// assert_eq!(IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0x7f00, 0x1)).to_canonical().is_loopback(), true);
+    /// ```
+    #[inline]
+    #[must_use = "this returns the result of the operation, \
+                  without modifying the original"]
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_ip", issue = "76205")
+    )]
+    #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))]
+    pub const fn to_canonical(&self) -> IpAddr {
+        match self {
+            &v4 @ IpAddr::V4(_) => v4,
+            IpAddr::V6(v6) => v6.to_canonical(),
+        }
+    }
+}
+
+impl Ipv4Addr {
+    /// Creates a new IPv4 address from four eight-bit octets.
+    ///
+    /// The result will represent the IP address `a`.`b`.`c`.`d`.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv4Addr;
+    ///
+    /// let addr = Ipv4Addr::new(127, 0, 0, 1);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_stable(feature = "const_ipv4", since = "1.32.0")
+    )]
+    #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+    #[must_use]
+    #[inline]
+    pub const fn new(a: u8, b: u8, c: u8, d: u8) -> Ipv4Addr {
+        // `s_addr` is stored as BE on all machine and the array is in BE order.
+        // So the native endian conversion method is used so that it's never swapped.
+        Ipv4Addr {
+            inner: in_addr_new(u32::from_ne_bytes([a, b, c, d])),
+        }
+    }
+
+    /// An IPv4 address with the address pointing to localhost: `127.0.0.1`
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv4Addr;
+    ///
+    /// let addr = Ipv4Addr::LOCALHOST;
+    /// assert_eq!(addr, Ipv4Addr::new(127, 0, 0, 1));
+    /// ```
+    #[cfg_attr(staged_api, stable(feature = "ip_constructors", since = "1.30.0"))]
+    pub const LOCALHOST: Self = Ipv4Addr::new(127, 0, 0, 1);
+
+    /// An IPv4 address representing an unspecified address: `0.0.0.0`
+    ///
+    /// This corresponds to the constant `INADDR_ANY` in other languages.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv4Addr;
+    ///
+    /// let addr = Ipv4Addr::UNSPECIFIED;
+    /// assert_eq!(addr, Ipv4Addr::new(0, 0, 0, 0));
+    /// ```
+    #[doc(alias = "INADDR_ANY")]
+    #[cfg_attr(staged_api, stable(feature = "ip_constructors", since = "1.30.0"))]
+    pub const UNSPECIFIED: Self = Ipv4Addr::new(0, 0, 0, 0);
+
+    /// An IPv4 address representing the broadcast address: `255.255.255.255`
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv4Addr;
+    ///
+    /// let addr = Ipv4Addr::BROADCAST;
+    /// assert_eq!(addr, Ipv4Addr::new(255, 255, 255, 255));
+    /// ```
+    #[cfg_attr(staged_api, stable(feature = "ip_constructors", since = "1.30.0"))]
+    pub const BROADCAST: Self = Ipv4Addr::new(255, 255, 255, 255);
+
+    /// Returns the four eight-bit integers that make up this address.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv4Addr;
+    ///
+    /// let addr = Ipv4Addr::new(127, 0, 0, 1);
+    /// assert_eq!(addr.octets(), [127, 0, 0, 1]);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_stable(feature = "const_ipv4", since = "1.50.0")
+    )]
+    #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+    #[must_use]
+    #[inline]
+    pub const fn octets(&self) -> [u8; 4] {
+        // This returns the order we want because s_addr is stored in big-endian.
+        in_addr_s_addr(self.inner).to_ne_bytes()
+    }
+
+    /// Returns [`true`] for the special 'unspecified' address (`0.0.0.0`).
+    ///
+    /// This property is defined in _UNIX Network Programming, Second Edition_,
+    /// W. Richard Stevens, p. 891; see also [ip7].
+    ///
+    /// [ip7]: https://man7.org/linux/man-pages/man7/ip.7.html
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv4Addr;
+    ///
+    /// assert_eq!(Ipv4Addr::new(0, 0, 0, 0).is_unspecified(), true);
+    /// assert_eq!(Ipv4Addr::new(45, 22, 13, 197).is_unspecified(), false);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_stable(feature = "const_ipv4", since = "1.32.0")
+    )]
+    #[cfg_attr(staged_api, stable(feature = "ip_shared", since = "1.12.0"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_unspecified(&self) -> bool {
+        in_addr_s_addr(self.inner) == 0
+    }
+
+    /// Returns [`true`] if this is a loopback address (`127.0.0.0/8`).
+    ///
+    /// This property is defined by [IETF RFC 1122].
+    ///
+    /// [IETF RFC 1122]: https://tools.ietf.org/html/rfc1122
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv4Addr;
+    ///
+    /// assert_eq!(Ipv4Addr::new(127, 0, 0, 1).is_loopback(), true);
+    /// assert_eq!(Ipv4Addr::new(45, 22, 13, 197).is_loopback(), false);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_stable(feature = "const_ipv4", since = "1.50.0")
+    )]
+    #[cfg_attr(staged_api, stable(since = "1.7.0", feature = "ip_17"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_loopback(&self) -> bool {
+        self.octets()[0] == 127
+    }
+
+    /// Returns [`true`] if this is a private address.
+    ///
+    /// The private address ranges are defined in [IETF RFC 1918] and include:
+    ///
+    ///  - `10.0.0.0/8`
+    ///  - `172.16.0.0/12`
+    ///  - `192.168.0.0/16`
+    ///
+    /// [IETF RFC 1918]: https://tools.ietf.org/html/rfc1918
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv4Addr;
+    ///
+    /// assert_eq!(Ipv4Addr::new(10, 0, 0, 1).is_private(), true);
+    /// assert_eq!(Ipv4Addr::new(10, 10, 10, 10).is_private(), true);
+    /// assert_eq!(Ipv4Addr::new(172, 16, 10, 10).is_private(), true);
+    /// assert_eq!(Ipv4Addr::new(172, 29, 45, 14).is_private(), true);
+    /// assert_eq!(Ipv4Addr::new(172, 32, 0, 2).is_private(), false);
+    /// assert_eq!(Ipv4Addr::new(192, 168, 0, 2).is_private(), true);
+    /// assert_eq!(Ipv4Addr::new(192, 169, 0, 2).is_private(), false);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_stable(feature = "const_ipv4", since = "1.50.0")
+    )]
+    #[cfg_attr(staged_api, stable(since = "1.7.0", feature = "ip_17"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_private(&self) -> bool {
+        match self.octets() {
+            [10, ..] => true,
+            [172, b, ..] if b >= 16 && b <= 31 => true,
+            [192, 168, ..] => true,
+            _ => false,
+        }
+    }
+
+    /// Returns [`true`] if the address is link-local (`169.254.0.0/16`).
+    ///
+    /// This property is defined by [IETF RFC 3927].
+    ///
+    /// [IETF RFC 3927]: https://tools.ietf.org/html/rfc3927
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv4Addr;
+    ///
+    /// assert_eq!(Ipv4Addr::new(169, 254, 0, 0).is_link_local(), true);
+    /// assert_eq!(Ipv4Addr::new(169, 254, 10, 65).is_link_local(), true);
+    /// assert_eq!(Ipv4Addr::new(16, 89, 10, 65).is_link_local(), false);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_stable(feature = "const_ipv4", since = "1.50.0")
+    )]
+    #[cfg_attr(staged_api, stable(since = "1.7.0", feature = "ip_17"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_link_local(&self) -> bool {
+        matches!(self.octets(), [169, 254, ..])
+    }
+
+    /// Returns [`true`] if the address appears to be globally routable.
+    /// See [iana-ipv4-special-registry][ipv4-sr].
+    ///
+    /// The following return [`false`]:
+    ///
+    /// - private addresses (see [`Ipv4Addr::is_private()`])
+    /// - the loopback address (see [`Ipv4Addr::is_loopback()`])
+    /// - the link-local address (see [`Ipv4Addr::is_link_local()`])
+    /// - the broadcast address (see [`Ipv4Addr::is_broadcast()`])
+    /// - addresses used for documentation (see [`Ipv4Addr::is_documentation()`])
+    /// - the unspecified address (see [`Ipv4Addr::is_unspecified()`]), and the whole
+    ///   `0.0.0.0/8` block
+    /// - addresses reserved for future protocols, except
+    /// `192.0.0.9/32` and `192.0.0.10/32` which are globally routable
+    /// - addresses reserved for future use (see [`Ipv4Addr::is_reserved()`]
+    /// - addresses reserved for networking devices benchmarking (see
+    /// [`Ipv4Addr::is_benchmarking()`])
+    ///
+    /// [ipv4-sr]: https://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(ip)]
+    ///
+    /// use std::net::Ipv4Addr;
+    ///
+    /// // private addresses are not global
+    /// assert_eq!(Ipv4Addr::new(10, 254, 0, 0).is_global(), false);
+    /// assert_eq!(Ipv4Addr::new(192, 168, 10, 65).is_global(), false);
+    /// assert_eq!(Ipv4Addr::new(172, 16, 10, 65).is_global(), false);
+    ///
+    /// // the 0.0.0.0/8 block is not global
+    /// assert_eq!(Ipv4Addr::new(0, 1, 2, 3).is_global(), false);
+    /// // in particular, the unspecified address is not global
+    /// assert_eq!(Ipv4Addr::new(0, 0, 0, 0).is_global(), false);
+    ///
+    /// // the loopback address is not global
+    /// assert_eq!(Ipv4Addr::new(127, 0, 0, 1).is_global(), false);
+    ///
+    /// // link local addresses are not global
+    /// assert_eq!(Ipv4Addr::new(169, 254, 45, 1).is_global(), false);
+    ///
+    /// // the broadcast address is not global
+    /// assert_eq!(Ipv4Addr::new(255, 255, 255, 255).is_global(), false);
+    ///
+    /// // the address space designated for documentation is not global
+    /// assert_eq!(Ipv4Addr::new(192, 0, 2, 255).is_global(), false);
+    /// assert_eq!(Ipv4Addr::new(198, 51, 100, 65).is_global(), false);
+    /// assert_eq!(Ipv4Addr::new(203, 0, 113, 6).is_global(), false);
+    ///
+    /// // shared addresses are not global
+    /// assert_eq!(Ipv4Addr::new(100, 100, 0, 0).is_global(), false);
+    ///
+    /// // addresses reserved for protocol assignment are not global
+    /// assert_eq!(Ipv4Addr::new(192, 0, 0, 0).is_global(), false);
+    /// assert_eq!(Ipv4Addr::new(192, 0, 0, 255).is_global(), false);
+    ///
+    /// // addresses reserved for future use are not global
+    /// assert_eq!(Ipv4Addr::new(250, 10, 20, 30).is_global(), false);
+    ///
+    /// // addresses reserved for network devices benchmarking are not global
+    /// assert_eq!(Ipv4Addr::new(198, 18, 0, 0).is_global(), false);
+    ///
+    /// // All the other addresses are global
+    /// assert_eq!(Ipv4Addr::new(1, 1, 1, 1).is_global(), true);
+    /// assert_eq!(Ipv4Addr::new(80, 9, 12, 3).is_global(), true);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_ipv4", issue = "76205")
+    )]
+    #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_global(&self) -> bool {
+        // check if this address is 192.0.0.9 or 192.0.0.10. These addresses are the only two
+        // globally routable addresses in the 192.0.0.0/24 range.
+        if u32::from_be_bytes(self.octets()) == 0xc0000009
+            || u32::from_be_bytes(self.octets()) == 0xc000000a
+        {
+            return true;
+        }
+        !self.is_private()
+            && !self.is_loopback()
+            && !self.is_link_local()
+            && !self.is_broadcast()
+            && !self.is_documentation()
+            && !self.is_shared()
+            // addresses reserved for future protocols (`192.0.0.0/24`)
+            && !(self.octets()[0] == 192 && self.octets()[1] == 0 && self.octets()[2] == 0)
+            && !self.is_reserved()
+            && !self.is_benchmarking()
+            // Make sure the address is not in 0.0.0.0/8
+            && self.octets()[0] != 0
+    }
+
+    /// Returns [`true`] if this address is part of the Shared Address Space defined in
+    /// [IETF RFC 6598] (`100.64.0.0/10`).
+    ///
+    /// [IETF RFC 6598]: https://tools.ietf.org/html/rfc6598
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(ip)]
+    /// use std::net::Ipv4Addr;
+    ///
+    /// assert_eq!(Ipv4Addr::new(100, 64, 0, 0).is_shared(), true);
+    /// assert_eq!(Ipv4Addr::new(100, 127, 255, 255).is_shared(), true);
+    /// assert_eq!(Ipv4Addr::new(100, 128, 0, 0).is_shared(), false);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_ipv4", issue = "76205")
+    )]
+    #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_shared(&self) -> bool {
+        self.octets()[0] == 100 && (self.octets()[1] & 0b1100_0000 == 0b0100_0000)
+    }
+
+    /// Returns [`true`] if this address part of the `198.18.0.0/15` range, which is reserved for
+    /// network devices benchmarking. This range is defined in [IETF RFC 2544] as `192.18.0.0`
+    /// through `198.19.255.255` but [errata 423] corrects it to `198.18.0.0/15`.
+    ///
+    /// [IETF RFC 2544]: https://tools.ietf.org/html/rfc2544
+    /// [errata 423]: https://www.rfc-editor.org/errata/eid423
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(ip)]
+    /// use std::net::Ipv4Addr;
+    ///
+    /// assert_eq!(Ipv4Addr::new(198, 17, 255, 255).is_benchmarking(), false);
+    /// assert_eq!(Ipv4Addr::new(198, 18, 0, 0).is_benchmarking(), true);
+    /// assert_eq!(Ipv4Addr::new(198, 19, 255, 255).is_benchmarking(), true);
+    /// assert_eq!(Ipv4Addr::new(198, 20, 0, 0).is_benchmarking(), false);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_ipv4", issue = "76205")
+    )]
+    #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_benchmarking(&self) -> bool {
+        self.octets()[0] == 198 && (self.octets()[1] & 0xfe) == 18
+    }
+
+    /// Returns [`true`] if this address is reserved by IANA for future use. [IETF RFC 1112]
+    /// defines the block of reserved addresses as `240.0.0.0/4`. This range normally includes the
+    /// broadcast address `255.255.255.255`, but this implementation explicitly excludes it, since
+    /// it is obviously not reserved for future use.
+    ///
+    /// [IETF RFC 1112]: https://tools.ietf.org/html/rfc1112
+    ///
+    /// # Warning
+    ///
+    /// As IANA assigns new addresses, this method will be
+    /// updated. This may result in non-reserved addresses being
+    /// treated as reserved in code that relies on an outdated version
+    /// of this method.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(ip)]
+    /// use std::net::Ipv4Addr;
+    ///
+    /// assert_eq!(Ipv4Addr::new(240, 0, 0, 0).is_reserved(), true);
+    /// assert_eq!(Ipv4Addr::new(255, 255, 255, 254).is_reserved(), true);
+    ///
+    /// assert_eq!(Ipv4Addr::new(239, 255, 255, 255).is_reserved(), false);
+    /// // The broadcast address is not considered as reserved for future use by this implementation
+    /// assert_eq!(Ipv4Addr::new(255, 255, 255, 255).is_reserved(), false);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_ipv4", issue = "76205")
+    )]
+    #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_reserved(&self) -> bool {
+        self.octets()[0] & 240 == 240 && !self.is_broadcast()
+    }
+
+    /// Returns [`true`] if this is a multicast address (`224.0.0.0/4`).
+    ///
+    /// Multicast addresses have a most significant octet between `224` and `239`,
+    /// and is defined by [IETF RFC 5771].
+    ///
+    /// [IETF RFC 5771]: https://tools.ietf.org/html/rfc5771
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv4Addr;
+    ///
+    /// assert_eq!(Ipv4Addr::new(224, 254, 0, 0).is_multicast(), true);
+    /// assert_eq!(Ipv4Addr::new(236, 168, 10, 65).is_multicast(), true);
+    /// assert_eq!(Ipv4Addr::new(172, 16, 10, 65).is_multicast(), false);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_stable(feature = "const_ipv4", since = "1.50.0")
+    )]
+    #[cfg_attr(staged_api, stable(since = "1.7.0", feature = "ip_17"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_multicast(&self) -> bool {
+        self.octets()[0] >= 224 && self.octets()[0] <= 239
+    }
+
+    /// Returns [`true`] if this is a broadcast address (`255.255.255.255`).
+    ///
+    /// A broadcast address has all octets set to `255` as defined in [IETF RFC 919].
+    ///
+    /// [IETF RFC 919]: https://tools.ietf.org/html/rfc919
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv4Addr;
+    ///
+    /// assert_eq!(Ipv4Addr::new(255, 255, 255, 255).is_broadcast(), true);
+    /// assert_eq!(Ipv4Addr::new(236, 168, 10, 65).is_broadcast(), false);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_stable(feature = "const_ipv4", since = "1.50.0")
+    )]
+    #[cfg_attr(staged_api, stable(since = "1.7.0", feature = "ip_17"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_broadcast(&self) -> bool {
+        u32::from_be_bytes(self.octets()) == u32::from_be_bytes(Self::BROADCAST.octets())
+    }
+
+    /// Returns [`true`] if this address is in a range designated for documentation.
+    ///
+    /// This is defined in [IETF RFC 5737]:
+    ///
+    /// - `192.0.2.0/24` (TEST-NET-1)
+    /// - `198.51.100.0/24` (TEST-NET-2)
+    /// - `203.0.113.0/24` (TEST-NET-3)
+    ///
+    /// [IETF RFC 5737]: https://tools.ietf.org/html/rfc5737
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv4Addr;
+    ///
+    /// assert_eq!(Ipv4Addr::new(192, 0, 2, 255).is_documentation(), true);
+    /// assert_eq!(Ipv4Addr::new(198, 51, 100, 65).is_documentation(), true);
+    /// assert_eq!(Ipv4Addr::new(203, 0, 113, 6).is_documentation(), true);
+    /// assert_eq!(Ipv4Addr::new(193, 34, 17, 19).is_documentation(), false);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_stable(feature = "const_ipv4", since = "1.50.0")
+    )]
+    #[cfg_attr(staged_api, stable(since = "1.7.0", feature = "ip_17"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_documentation(&self) -> bool {
+        match self.octets() {
+            [192, 0, 2, _] => true,
+            [198, 51, 100, _] => true,
+            [203, 0, 113, _] => true,
+            _ => false,
+        }
+    }
+
+    /// Converts this address to an [IPv4-compatible] [`IPv6` address].
+    ///
+    /// `a.b.c.d` becomes `::a.b.c.d`
+    ///
+    /// Note that IPv4-compatible addresses have been officially deprecated.
+    /// If you don't explicitly need an IPv4-compatible address for legacy reasons, consider using `to_ipv6_mapped` instead.
+    ///
+    /// [IPv4-compatible]: Ipv6Addr#ipv4-compatible-ipv6-addresses
+    /// [`IPv6` address]: Ipv6Addr
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::{Ipv4Addr, Ipv6Addr};
+    ///
+    /// assert_eq!(
+    ///     Ipv4Addr::new(192, 0, 2, 255).to_ipv6_compatible(),
+    ///     Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0xc000, 0x2ff)
+    /// );
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_stable(feature = "const_ipv4", since = "1.50.0")
+    )]
+    #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+    #[must_use = "this returns the result of the operation, \
+                  without modifying the original"]
+    #[inline]
+    pub const fn to_ipv6_compatible(&self) -> Ipv6Addr {
+        let [a, b, c, d] = self.octets();
+        Ipv6Addr {
+            inner: in6_addr_new([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, a, b, c, d]),
+        }
+    }
+
+    /// Converts this address to an [IPv4-mapped] [`IPv6` address].
+    ///
+    /// `a.b.c.d` becomes `::ffff:a.b.c.d`
+    ///
+    /// [IPv4-mapped]: Ipv6Addr#ipv4-mapped-ipv6-addresses
+    /// [`IPv6` address]: Ipv6Addr
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::{Ipv4Addr, Ipv6Addr};
+    ///
+    /// assert_eq!(Ipv4Addr::new(192, 0, 2, 255).to_ipv6_mapped(),
+    ///            Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc000, 0x2ff));
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_stable(feature = "const_ipv4", since = "1.50.0")
+    )]
+    #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+    #[must_use = "this returns the result of the operation, \
+                  without modifying the original"]
+    #[inline]
+    pub const fn to_ipv6_mapped(&self) -> Ipv6Addr {
+        let [a, b, c, d] = self.octets();
+        Ipv6Addr {
+            inner: in6_addr_new([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF, a, b, c, d]),
+        }
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "ip_from_ip", since = "1.16.0"))]
+impl From<Ipv4Addr> for IpAddr {
+    /// Copies this address to a new `IpAddr::V4`.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::{IpAddr, Ipv4Addr};
+    ///
+    /// let addr = Ipv4Addr::new(127, 0, 0, 1);
+    ///
+    /// assert_eq!(
+    ///     IpAddr::V4(addr),
+    ///     IpAddr::from(addr)
+    /// )
+    /// ```
+    #[inline]
+    fn from(ipv4: Ipv4Addr) -> IpAddr {
+        IpAddr::V4(ipv4)
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "ip_from_ip", since = "1.16.0"))]
+impl From<Ipv6Addr> for IpAddr {
+    /// Copies this address to a new `IpAddr::V6`.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::{IpAddr, Ipv6Addr};
+    ///
+    /// let addr = Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff);
+    ///
+    /// assert_eq!(
+    ///     IpAddr::V6(addr),
+    ///     IpAddr::from(addr)
+    /// );
+    /// ```
+    #[inline]
+    fn from(ipv6: Ipv6Addr) -> IpAddr {
+        IpAddr::V6(ipv6)
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+impl Clone for Ipv4Addr {
+    #[inline]
+    fn clone(&self) -> Ipv4Addr {
+        *self
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+impl PartialEq for Ipv4Addr {
+    #[inline]
+    fn eq(&self, other: &Ipv4Addr) -> bool {
+        in_addr_s_addr(self.inner) == in_addr_s_addr(other.inner)
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "ip_cmp", since = "1.16.0"))]
+impl PartialEq<Ipv4Addr> for IpAddr {
+    #[inline]
+    fn eq(&self, other: &Ipv4Addr) -> bool {
+        match self {
+            IpAddr::V4(v4) => v4 == other,
+            IpAddr::V6(_) => false,
+        }
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "ip_cmp", since = "1.16.0"))]
+impl PartialEq<IpAddr> for Ipv4Addr {
+    #[inline]
+    fn eq(&self, other: &IpAddr) -> bool {
+        match other {
+            IpAddr::V4(v4) => self == v4,
+            IpAddr::V6(_) => false,
+        }
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+impl Eq for Ipv4Addr {}
+
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+impl hash::Hash for Ipv4Addr {
+    #[inline]
+    fn hash<H: hash::Hasher>(&self, s: &mut H) {
+        // NOTE:
+        // * hash in big endian order
+        // * in netbsd, `in_addr` has `repr(packed)`, we need to
+        //   copy `s_addr` to avoid unsafe borrowing
+        { in_addr_s_addr(self.inner) }.hash(s)
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+impl PartialOrd for Ipv4Addr {
+    #[inline]
+    fn partial_cmp(&self, other: &Ipv4Addr) -> Option<Ordering> {
+        Some(self.cmp(other))
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "ip_cmp", since = "1.16.0"))]
+impl PartialOrd<Ipv4Addr> for IpAddr {
+    #[inline]
+    fn partial_cmp(&self, other: &Ipv4Addr) -> Option<Ordering> {
+        match self {
+            IpAddr::V4(v4) => v4.partial_cmp(other),
+            IpAddr::V6(_) => Some(Ordering::Greater),
+        }
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "ip_cmp", since = "1.16.0"))]
+impl PartialOrd<IpAddr> for Ipv4Addr {
+    #[inline]
+    fn partial_cmp(&self, other: &IpAddr) -> Option<Ordering> {
+        match other {
+            IpAddr::V4(v4) => self.partial_cmp(v4),
+            IpAddr::V6(_) => Some(Ordering::Less),
+        }
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+impl Ord for Ipv4Addr {
+    #[inline]
+    fn cmp(&self, other: &Ipv4Addr) -> Ordering {
+        // Compare as native endian
+        u32::from_be(in_addr_s_addr(self.inner)).cmp(&u32::from_be(in_addr_s_addr(other.inner)))
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "ip_u32", since = "1.1.0"))]
+impl From<Ipv4Addr> for u32 {
+    /// Converts an `Ipv4Addr` into a host byte order `u32`.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv4Addr;
+    ///
+    /// let addr = Ipv4Addr::new(0xca, 0xfe, 0xba, 0xbe);
+    /// assert_eq!(0xcafebabe, u32::from(addr));
+    /// ```
+    #[inline]
+    fn from(ip: Ipv4Addr) -> u32 {
+        let ip = ip.octets();
+        u32::from_be_bytes(ip)
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "ip_u32", since = "1.1.0"))]
+impl From<u32> for Ipv4Addr {
+    /// Converts a host byte order `u32` into an `Ipv4Addr`.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv4Addr;
+    ///
+    /// let addr = Ipv4Addr::from(0xcafebabe);
+    /// assert_eq!(Ipv4Addr::new(0xca, 0xfe, 0xba, 0xbe), addr);
+    /// ```
+    #[inline]
+    fn from(ip: u32) -> Ipv4Addr {
+        Ipv4Addr::from(ip.to_be_bytes())
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "from_slice_v4", since = "1.9.0"))]
+impl From<[u8; 4]> for Ipv4Addr {
+    /// Creates an `Ipv4Addr` from a four element byte array.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv4Addr;
+    ///
+    /// let addr = Ipv4Addr::from([13u8, 12u8, 11u8, 10u8]);
+    /// assert_eq!(Ipv4Addr::new(13, 12, 11, 10), addr);
+    /// ```
+    #[inline]
+    fn from(octets: [u8; 4]) -> Ipv4Addr {
+        Ipv4Addr::new(octets[0], octets[1], octets[2], octets[3])
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "ip_from_slice", since = "1.17.0"))]
+impl From<[u8; 4]> for IpAddr {
+    /// Creates an `IpAddr::V4` from a four element byte array.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::{IpAddr, Ipv4Addr};
+    ///
+    /// let addr = IpAddr::from([13u8, 12u8, 11u8, 10u8]);
+    /// assert_eq!(IpAddr::V4(Ipv4Addr::new(13, 12, 11, 10)), addr);
+    /// ```
+    #[inline]
+    fn from(octets: [u8; 4]) -> IpAddr {
+        IpAddr::V4(Ipv4Addr::from(octets))
+    }
+}
+
+impl Ipv6Addr {
+    /// Creates a new IPv6 address from eight 16-bit segments.
+    ///
+    /// The result will represent the IP address `a:b:c:d:e:f:g:h`.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv6Addr;
+    ///
+    /// let addr = Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_stable(feature = "const_ipv6", since = "1.32.0")
+    )]
+    #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+    #[must_use]
+    #[inline]
+    pub const fn new(a: u16, b: u16, c: u16, d: u16, e: u16, f: u16, g: u16, h: u16) -> Ipv6Addr {
+        let addr16 = [
+            a.to_be(),
+            b.to_be(),
+            c.to_be(),
+            d.to_be(),
+            e.to_be(),
+            f.to_be(),
+            g.to_be(),
+            h.to_be(),
+        ];
+        Ipv6Addr {
+            // All elements in `addr16` are big endian.
+            // SAFETY: `[u16; 8]` is always safe to transmute to `[u8; 16]`.
+            // rustc_allow_const_fn_unstable: the transmute could be written as stable const
+            // code, but that leads to worse code generation (#75085)
+            inner: in6_addr_new(unsafe { transmute::<_, [u8; 16]>(addr16) }),
+        }
+    }
+
+    /// An IPv6 address representing localhost: `::1`.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv6Addr;
+    ///
+    /// let addr = Ipv6Addr::LOCALHOST;
+    /// assert_eq!(addr, Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1));
+    /// ```
+    #[cfg_attr(staged_api, stable(feature = "ip_constructors", since = "1.30.0"))]
+    pub const LOCALHOST: Self = Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1);
+
+    /// An IPv6 address representing the unspecified address: `::`
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv6Addr;
+    ///
+    /// let addr = Ipv6Addr::UNSPECIFIED;
+    /// assert_eq!(addr, Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0));
+    /// ```
+    #[cfg_attr(staged_api, stable(feature = "ip_constructors", since = "1.30.0"))]
+    pub const UNSPECIFIED: Self = Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0);
+
+    /// Returns the eight 16-bit segments that make up this address.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv6Addr;
+    ///
+    /// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).segments(),
+    ///            [0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff]);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_stable(feature = "const_ipv6", since = "1.50.0")
+    )]
+    #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+    #[must_use]
+    #[inline]
+    pub const fn segments(&self) -> [u16; 8] {
+        // All elements in `s6_addr` must be big endian.
+        // SAFETY: `[u8; 16]` is always safe to transmute to `[u16; 8]`.
+        // rustc_allow_const_fn_unstable: the transmute could be written as stable const code, but
+        // that leads to worse code generation (#75085)
+        let [a, b, c, d, e, f, g, h] =
+            unsafe { transmute::<_, [u16; 8]>(in6_addr_s6_addr(self.inner)) };
+        // We want native endian u16
+        [
+            u16::from_be(a),
+            u16::from_be(b),
+            u16::from_be(c),
+            u16::from_be(d),
+            u16::from_be(e),
+            u16::from_be(f),
+            u16::from_be(g),
+            u16::from_be(h),
+        ]
+    }
+
+    /// Returns [`true`] for the special 'unspecified' address (`::`).
+    ///
+    /// This property is defined in [IETF RFC 4291].
+    ///
+    /// [IETF RFC 4291]: https://tools.ietf.org/html/rfc4291
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv6Addr;
+    ///
+    /// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_unspecified(), false);
+    /// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0).is_unspecified(), true);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_stable(feature = "const_ipv6", since = "1.50.0")
+    )]
+    #[cfg_attr(staged_api, stable(since = "1.7.0", feature = "ip_17"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_unspecified(&self) -> bool {
+        u128::from_be_bytes(self.octets()) == u128::from_be_bytes(Ipv6Addr::UNSPECIFIED.octets())
+    }
+
+    /// Returns [`true`] if this is the [loopback address] (`::1`),
+    /// as defined in [IETF RFC 4291 section 2.5.3].
+    ///
+    /// Contrary to IPv4, in IPv6 there is only one loopback address.
+    ///
+    /// [loopback address]: Ipv6Addr::LOCALHOST
+    /// [IETF RFC 4291 section 2.5.3]: https://tools.ietf.org/html/rfc4291#section-2.5.3
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv6Addr;
+    ///
+    /// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_loopback(), false);
+    /// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0x1).is_loopback(), true);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_stable(feature = "const_ipv6", since = "1.50.0")
+    )]
+    #[cfg_attr(staged_api, stable(since = "1.7.0", feature = "ip_17"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_loopback(&self) -> bool {
+        u128::from_be_bytes(self.octets()) == u128::from_be_bytes(Ipv6Addr::LOCALHOST.octets())
+    }
+
+    /// Returns [`true`] if the address appears to be globally routable.
+    ///
+    /// The following return [`false`]:
+    ///
+    /// - the loopback address
+    /// - link-local and unique local unicast addresses
+    /// - interface-, link-, realm-, admin- and site-local multicast addresses
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(ip)]
+    ///
+    /// use std::net::Ipv6Addr;
+    ///
+    /// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_global(), true);
+    /// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0x1).is_global(), false);
+    /// assert_eq!(Ipv6Addr::new(0, 0, 0x1c9, 0, 0, 0xafc8, 0, 0x1).is_global(), true);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_ipv6", issue = "76205")
+    )]
+    #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_global(&self) -> bool {
+        match self.multicast_scope() {
+            Some(Ipv6MulticastScope::Global) => true,
+            None => self.is_unicast_global(),
+            _ => false,
+        }
+    }
+
+    /// Returns [`true`] if this is a unique local address (`fc00::/7`).
+    ///
+    /// This property is defined in [IETF RFC 4193].
+    ///
+    /// [IETF RFC 4193]: https://tools.ietf.org/html/rfc4193
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(ip)]
+    ///
+    /// use std::net::Ipv6Addr;
+    ///
+    /// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_unique_local(), false);
+    /// assert_eq!(Ipv6Addr::new(0xfc02, 0, 0, 0, 0, 0, 0, 0).is_unique_local(), true);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_ipv6", issue = "76205")
+    )]
+    #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_unique_local(&self) -> bool {
+        (self.segments()[0] & 0xfe00) == 0xfc00
+    }
+
+    /// Returns [`true`] if this is a unicast address, as defined by [IETF RFC 4291].
+    /// Any address that is not a [multicast address] (`ff00::/8`) is unicast.
+    ///
+    /// [IETF RFC 4291]: https://tools.ietf.org/html/rfc4291
+    /// [multicast address]: Ipv6Addr::is_multicast
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(ip)]
+    ///
+    /// use std::net::Ipv6Addr;
+    ///
+    /// // The unspecified and loopback addresses are unicast.
+    /// assert_eq!(Ipv6Addr::UNSPECIFIED.is_unicast(), true);
+    /// assert_eq!(Ipv6Addr::LOCALHOST.is_unicast(), true);
+    ///
+    /// // Any address that is not a multicast address (`ff00::/8`) is unicast.
+    /// assert_eq!(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 0).is_unicast(), true);
+    /// assert_eq!(Ipv6Addr::new(0xff00, 0, 0, 0, 0, 0, 0, 0).is_unicast(), false);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_ipv6", issue = "76205")
+    )]
+    #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_unicast(&self) -> bool {
+        !self.is_multicast()
+    }
+
+    /// Returns `true` if the address is a unicast address with link-local scope,
+    /// as defined in [RFC 4291].
+    ///
+    /// A unicast address has link-local scope if it has the prefix `fe80::/10`, as per [RFC 4291 section 2.4].
+    /// Note that this encompasses more addresses than those defined in [RFC 4291 section 2.5.6],
+    /// which describes "Link-Local IPv6 Unicast Addresses" as having the following stricter format:
+    ///
+    /// ```text
+    /// | 10 bits  |         54 bits         |          64 bits           |
+    /// +----------+-------------------------+----------------------------+
+    /// |1111111010|           0             |       interface ID         |
+    /// +----------+-------------------------+----------------------------+
+    /// ```
+    /// So while currently the only addresses with link-local scope an application will encounter are all in `fe80::/64`,
+    /// this might change in the future with the publication of new standards. More addresses in `fe80::/10` could be allocated,
+    /// and those addresses will have link-local scope.
+    ///
+    /// Also note that while [RFC 4291 section 2.5.3] mentions about the [loopback address] (`::1`) that "it is treated as having Link-Local scope",
+    /// this does not mean that the loopback address actually has link-local scope and this method will return `false` on it.
+    ///
+    /// [RFC 4291]: https://tools.ietf.org/html/rfc4291
+    /// [RFC 4291 section 2.4]: https://tools.ietf.org/html/rfc4291#section-2.4
+    /// [RFC 4291 section 2.5.3]: https://tools.ietf.org/html/rfc4291#section-2.5.3
+    /// [RFC 4291 section 2.5.6]: https://tools.ietf.org/html/rfc4291#section-2.5.6
+    /// [loopback address]: Ipv6Addr::LOCALHOST
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(ip)]
+    ///
+    /// use std::net::Ipv6Addr;
+    ///
+    /// // The loopback address (`::1`) does not actually have link-local scope.
+    /// assert_eq!(Ipv6Addr::LOCALHOST.is_unicast_link_local(), false);
+    ///
+    /// // Only addresses in `fe80::/10` have link-local scope.
+    /// assert_eq!(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 0).is_unicast_link_local(), false);
+    /// assert_eq!(Ipv6Addr::new(0xfe80, 0, 0, 0, 0, 0, 0, 0).is_unicast_link_local(), true);
+    ///
+    /// // Addresses outside the stricter `fe80::/64` also have link-local scope.
+    /// assert_eq!(Ipv6Addr::new(0xfe80, 0, 0, 1, 0, 0, 0, 0).is_unicast_link_local(), true);
+    /// assert_eq!(Ipv6Addr::new(0xfe81, 0, 0, 0, 0, 0, 0, 0).is_unicast_link_local(), true);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_ipv6", issue = "76205")
+    )]
+    #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_unicast_link_local(&self) -> bool {
+        (self.segments()[0] & 0xffc0) == 0xfe80
+    }
+
+    /// Returns [`true`] if this is an address reserved for documentation
+    /// (`2001:db8::/32`).
+    ///
+    /// This property is defined in [IETF RFC 3849].
+    ///
+    /// [IETF RFC 3849]: https://tools.ietf.org/html/rfc3849
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(ip)]
+    ///
+    /// use std::net::Ipv6Addr;
+    ///
+    /// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_documentation(), false);
+    /// assert_eq!(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 0).is_documentation(), true);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_ipv6", issue = "76205")
+    )]
+    #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_documentation(&self) -> bool {
+        (self.segments()[0] == 0x2001) && (self.segments()[1] == 0xdb8)
+    }
+
+    /// Returns [`true`] if this is an address reserved for benchmarking (`2001:2::/48`).
+    ///
+    /// This property is defined in [IETF RFC 5180], where it is mistakenly specified as covering the range `2001:0200::/48`.
+    /// This is corrected in [IETF RFC Errata 1752] to `2001:0002::/48`.
+    ///
+    /// [IETF RFC 5180]: https://tools.ietf.org/html/rfc5180
+    /// [IETF RFC Errata 1752]: https://www.rfc-editor.org/errata_search.php?eid=1752
+    ///
+    /// ```
+    /// #![feature(ip)]
+    ///
+    /// use std::net::Ipv6Addr;
+    ///
+    /// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc613, 0x0).is_benchmarking(), false);
+    /// assert_eq!(Ipv6Addr::new(0x2001, 0x2, 0, 0, 0, 0, 0, 0).is_benchmarking(), true);
+    /// ```
+    #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_benchmarking(&self) -> bool {
+        (self.segments()[0] == 0x2001) && (self.segments()[1] == 0x2) && (self.segments()[2] == 0)
+    }
+
+    /// Returns [`true`] if the address is a globally routable unicast address.
+    ///
+    /// The following return false:
+    ///
+    /// - the loopback address
+    /// - the link-local addresses
+    /// - unique local addresses
+    /// - the unspecified address
+    /// - the address range reserved for documentation
+    ///
+    /// This method returns [`true`] for site-local addresses as per [RFC 4291 section 2.5.7]
+    ///
+    /// ```no_rust
+    /// The special behavior of [the site-local unicast] prefix defined in [RFC3513] must no longer
+    /// be supported in new implementations (i.e., new implementations must treat this prefix as
+    /// Global Unicast).
+    /// ```
+    ///
+    /// [RFC 4291 section 2.5.7]: https://tools.ietf.org/html/rfc4291#section-2.5.7
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(ip)]
+    ///
+    /// use std::net::Ipv6Addr;
+    ///
+    /// assert_eq!(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 0).is_unicast_global(), false);
+    /// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_unicast_global(), true);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_ipv6", issue = "76205")
+    )]
+    #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_unicast_global(&self) -> bool {
+        self.is_unicast()
+            && !self.is_loopback()
+            && !self.is_unicast_link_local()
+            && !self.is_unique_local()
+            && !self.is_unspecified()
+            && !self.is_documentation()
+    }
+
+    /// Returns the address's multicast scope if the address is multicast.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(ip)]
+    ///
+    /// use std::net::{Ipv6Addr, Ipv6MulticastScope};
+    ///
+    /// assert_eq!(
+    ///     Ipv6Addr::new(0xff0e, 0, 0, 0, 0, 0, 0, 0).multicast_scope(),
+    ///     Some(Ipv6MulticastScope::Global)
+    /// );
+    /// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).multicast_scope(), None);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_ipv6", issue = "76205")
+    )]
+    #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))]
+    #[must_use]
+    #[inline]
+    pub const fn multicast_scope(&self) -> Option<Ipv6MulticastScope> {
+        if self.is_multicast() {
+            match self.segments()[0] & 0x000f {
+                1 => Some(Ipv6MulticastScope::InterfaceLocal),
+                2 => Some(Ipv6MulticastScope::LinkLocal),
+                3 => Some(Ipv6MulticastScope::RealmLocal),
+                4 => Some(Ipv6MulticastScope::AdminLocal),
+                5 => Some(Ipv6MulticastScope::SiteLocal),
+                8 => Some(Ipv6MulticastScope::OrganizationLocal),
+                14 => Some(Ipv6MulticastScope::Global),
+                _ => None,
+            }
+        } else {
+            None
+        }
+    }
+
+    /// Returns [`true`] if this is a multicast address (`ff00::/8`).
+    ///
+    /// This property is defined by [IETF RFC 4291].
+    ///
+    /// [IETF RFC 4291]: https://tools.ietf.org/html/rfc4291
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv6Addr;
+    ///
+    /// assert_eq!(Ipv6Addr::new(0xff00, 0, 0, 0, 0, 0, 0, 0).is_multicast(), true);
+    /// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).is_multicast(), false);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_stable(feature = "const_ipv6", since = "1.50.0")
+    )]
+    #[cfg_attr(staged_api, stable(since = "1.7.0", feature = "ip_17"))]
+    #[must_use]
+    #[inline]
+    pub const fn is_multicast(&self) -> bool {
+        (self.segments()[0] & 0xff00) == 0xff00
+    }
+
+    /// Converts this address to an [`IPv4` address] if it's an [IPv4-mapped] address,
+    /// as defined in [IETF RFC 4291 section 2.5.5.2], otherwise returns [`None`].
+    ///
+    /// `::ffff:a.b.c.d` becomes `a.b.c.d`.
+    /// All addresses *not* starting with `::ffff` will return `None`.
+    ///
+    /// [`IPv4` address]: Ipv4Addr
+    /// [IPv4-mapped]: Ipv6Addr
+    /// [IETF RFC 4291 section 2.5.5.2]: https://tools.ietf.org/html/rfc4291#section-2.5.5.2
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(ip)]
+    ///
+    /// use std::net::{Ipv4Addr, Ipv6Addr};
+    ///
+    /// assert_eq!(Ipv6Addr::new(0xff00, 0, 0, 0, 0, 0, 0, 0).to_ipv4_mapped(), None);
+    /// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).to_ipv4_mapped(),
+    ///            Some(Ipv4Addr::new(192, 10, 2, 255)));
+    /// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1).to_ipv4_mapped(), None);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_ipv6", issue = "76205")
+    )]
+    #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))]
+    #[must_use = "this returns the result of the operation, \
+                  without modifying the original"]
+    #[inline]
+    pub const fn to_ipv4_mapped(&self) -> Option<Ipv4Addr> {
+        match self.octets() {
+            [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, a, b, c, d] => {
+                Some(Ipv4Addr::new(a, b, c, d))
+            }
+            _ => None,
+        }
+    }
+
+    /// Converts this address to an [`IPv4` address] if it is either
+    /// an [IPv4-compatible] address as defined in [IETF RFC 4291 section 2.5.5.1],
+    /// or an [IPv4-mapped] address as defined in [IETF RFC 4291 section 2.5.5.2],
+    /// otherwise returns [`None`].
+    ///
+    /// `::a.b.c.d` and `::ffff:a.b.c.d` become `a.b.c.d`
+    /// All addresses *not* starting with either all zeroes or `::ffff` will return `None`.
+    ///
+    /// [`IPv4` address]: Ipv4Addr
+    /// [IPv4-compatible]: Ipv6Addr#ipv4-compatible-ipv6-addresses
+    /// [IPv4-mapped]: Ipv6Addr#ipv4-mapped-ipv6-addresses
+    /// [IETF RFC 4291 section 2.5.5.1]: https://tools.ietf.org/html/rfc4291#section-2.5.5.1
+    /// [IETF RFC 4291 section 2.5.5.2]: https://tools.ietf.org/html/rfc4291#section-2.5.5.2
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::{Ipv4Addr, Ipv6Addr};
+    ///
+    /// assert_eq!(Ipv6Addr::new(0xff00, 0, 0, 0, 0, 0, 0, 0).to_ipv4(), None);
+    /// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0xc00a, 0x2ff).to_ipv4(),
+    ///            Some(Ipv4Addr::new(192, 10, 2, 255)));
+    /// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1).to_ipv4(),
+    ///            Some(Ipv4Addr::new(0, 0, 0, 1)));
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_stable(feature = "const_ipv6", since = "1.50.0")
+    )]
+    #[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+    #[must_use = "this returns the result of the operation, \
+                  without modifying the original"]
+    #[inline]
+    pub const fn to_ipv4(&self) -> Option<Ipv4Addr> {
+        if let [0, 0, 0, 0, 0, 0 | 0xffff, ab, cd] = self.segments() {
+            let [a, b] = ab.to_be_bytes();
+            let [c, d] = cd.to_be_bytes();
+            Some(Ipv4Addr::new(a, b, c, d))
+        } else {
+            None
+        }
+    }
+
+    /// Converts this address to an `IpAddr::V4` if it is an IPv4-mapped addresses, otherwise it
+    /// returns self wrapped in an `IpAddr::V6`.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(ip)]
+    /// use std::net::Ipv6Addr;
+    ///
+    /// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0x7f00, 0x1).is_loopback(), false);
+    /// assert_eq!(Ipv6Addr::new(0, 0, 0, 0, 0, 0xffff, 0x7f00, 0x1).to_canonical().is_loopback(), true);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_unstable(feature = "const_ipv6", issue = "76205")
+    )]
+    #[cfg_attr(staged_api, unstable(feature = "ip", issue = "27709"))]
+    #[must_use = "this returns the result of the operation, \
+                  without modifying the original"]
+    #[inline]
+    pub const fn to_canonical(&self) -> IpAddr {
+        if let Some(mapped) = self.to_ipv4_mapped() {
+            return IpAddr::V4(mapped);
+        }
+        IpAddr::V6(*self)
+    }
+
+    /// Returns the sixteen eight-bit integers the IPv6 address consists of.
+    ///
+    /// ```
+    /// use std::net::Ipv6Addr;
+    ///
+    /// assert_eq!(Ipv6Addr::new(0xff00, 0, 0, 0, 0, 0, 0, 0).octets(),
+    ///            [255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]);
+    /// ```
+    #[cfg_attr(
+        staged_api,
+        rustc_const_stable(feature = "const_ipv6", since = "1.32.0")
+    )]
+    #[cfg_attr(staged_api, stable(feature = "ipv6_to_octets", since = "1.12.0"))]
+    #[must_use]
+    #[inline]
+    pub const fn octets(&self) -> [u8; 16] {
+        in6_addr_s6_addr(self.inner)
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+impl Clone for Ipv6Addr {
+    #[inline]
+    fn clone(&self) -> Ipv6Addr {
+        *self
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+impl PartialEq for Ipv6Addr {
+    #[inline]
+    fn eq(&self, other: &Ipv6Addr) -> bool {
+        in6_addr_s6_addr(self.inner) == in6_addr_s6_addr(other.inner)
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "ip_cmp", since = "1.16.0"))]
+impl PartialEq<IpAddr> for Ipv6Addr {
+    #[inline]
+    fn eq(&self, other: &IpAddr) -> bool {
+        match other {
+            IpAddr::V4(_) => false,
+            IpAddr::V6(v6) => self == v6,
+        }
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "ip_cmp", since = "1.16.0"))]
+impl PartialEq<Ipv6Addr> for IpAddr {
+    #[inline]
+    fn eq(&self, other: &Ipv6Addr) -> bool {
+        match self {
+            IpAddr::V4(_) => false,
+            IpAddr::V6(v6) => v6 == other,
+        }
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+impl Eq for Ipv6Addr {}
+
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+impl hash::Hash for Ipv6Addr {
+    #[inline]
+    fn hash<H: hash::Hasher>(&self, s: &mut H) {
+        in6_addr_s6_addr(self.inner).hash(s)
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+impl PartialOrd for Ipv6Addr {
+    #[inline]
+    fn partial_cmp(&self, other: &Ipv6Addr) -> Option<Ordering> {
+        Some(self.cmp(other))
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "ip_cmp", since = "1.16.0"))]
+impl PartialOrd<Ipv6Addr> for IpAddr {
+    #[inline]
+    fn partial_cmp(&self, other: &Ipv6Addr) -> Option<Ordering> {
+        match self {
+            IpAddr::V4(_) => Some(Ordering::Less),
+            IpAddr::V6(v6) => v6.partial_cmp(other),
+        }
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "ip_cmp", since = "1.16.0"))]
+impl PartialOrd<IpAddr> for Ipv6Addr {
+    #[inline]
+    fn partial_cmp(&self, other: &IpAddr) -> Option<Ordering> {
+        match other {
+            IpAddr::V4(_) => Some(Ordering::Greater),
+            IpAddr::V6(v6) => self.partial_cmp(v6),
+        }
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "rust1", since = "1.0.0"))]
+impl Ord for Ipv6Addr {
+    #[inline]
+    fn cmp(&self, other: &Ipv6Addr) -> Ordering {
+        self.segments().cmp(&other.segments())
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "i128", since = "1.26.0"))]
+impl From<Ipv6Addr> for u128 {
+    /// Convert an `Ipv6Addr` into a host byte order `u128`.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv6Addr;
+    ///
+    /// let addr = Ipv6Addr::new(
+    ///     0x1020, 0x3040, 0x5060, 0x7080,
+    ///     0x90A0, 0xB0C0, 0xD0E0, 0xF00D,
+    /// );
+    /// assert_eq!(0x102030405060708090A0B0C0D0E0F00D_u128, u128::from(addr));
+    /// ```
+    #[inline]
+    fn from(ip: Ipv6Addr) -> u128 {
+        let ip = ip.octets();
+        u128::from_be_bytes(ip)
+    }
+}
+#[cfg_attr(staged_api, stable(feature = "i128", since = "1.26.0"))]
+impl From<u128> for Ipv6Addr {
+    /// Convert a host byte order `u128` into an `Ipv6Addr`.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv6Addr;
+    ///
+    /// let addr = Ipv6Addr::from(0x102030405060708090A0B0C0D0E0F00D_u128);
+    /// assert_eq!(
+    ///     Ipv6Addr::new(
+    ///         0x1020, 0x3040, 0x5060, 0x7080,
+    ///         0x90A0, 0xB0C0, 0xD0E0, 0xF00D,
+    ///     ),
+    ///     addr);
+    /// ```
+    #[inline]
+    fn from(ip: u128) -> Ipv6Addr {
+        Ipv6Addr::from(ip.to_be_bytes())
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "ipv6_from_octets", since = "1.9.0"))]
+impl From<[u8; 16]> for Ipv6Addr {
+    /// Creates an `Ipv6Addr` from a sixteen element byte array.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv6Addr;
+    ///
+    /// let addr = Ipv6Addr::from([
+    ///     25u8, 24u8, 23u8, 22u8, 21u8, 20u8, 19u8, 18u8,
+    ///     17u8, 16u8, 15u8, 14u8, 13u8, 12u8, 11u8, 10u8,
+    /// ]);
+    /// assert_eq!(
+    ///     Ipv6Addr::new(
+    ///         0x1918, 0x1716,
+    ///         0x1514, 0x1312,
+    ///         0x1110, 0x0f0e,
+    ///         0x0d0c, 0x0b0a
+    ///     ),
+    ///     addr
+    /// );
+    /// ```
+    #[inline]
+    fn from(octets: [u8; 16]) -> Ipv6Addr {
+        Ipv6Addr {
+            inner: in6_addr_new(octets),
+        }
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "ipv6_from_segments", since = "1.16.0"))]
+impl From<[u16; 8]> for Ipv6Addr {
+    /// Creates an `Ipv6Addr` from an eight element 16-bit array.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::Ipv6Addr;
+    ///
+    /// let addr = Ipv6Addr::from([
+    ///     525u16, 524u16, 523u16, 522u16,
+    ///     521u16, 520u16, 519u16, 518u16,
+    /// ]);
+    /// assert_eq!(
+    ///     Ipv6Addr::new(
+    ///         0x20d, 0x20c,
+    ///         0x20b, 0x20a,
+    ///         0x209, 0x208,
+    ///         0x207, 0x206
+    ///     ),
+    ///     addr
+    /// );
+    /// ```
+    #[inline]
+    fn from(segments: [u16; 8]) -> Ipv6Addr {
+        let [a, b, c, d, e, f, g, h] = segments;
+        Ipv6Addr::new(a, b, c, d, e, f, g, h)
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "ip_from_slice", since = "1.17.0"))]
+impl From<[u8; 16]> for IpAddr {
+    /// Creates an `IpAddr::V6` from a sixteen element byte array.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::{IpAddr, Ipv6Addr};
+    ///
+    /// let addr = IpAddr::from([
+    ///     25u8, 24u8, 23u8, 22u8, 21u8, 20u8, 19u8, 18u8,
+    ///     17u8, 16u8, 15u8, 14u8, 13u8, 12u8, 11u8, 10u8,
+    /// ]);
+    /// assert_eq!(
+    ///     IpAddr::V6(Ipv6Addr::new(
+    ///         0x1918, 0x1716,
+    ///         0x1514, 0x1312,
+    ///         0x1110, 0x0f0e,
+    ///         0x0d0c, 0x0b0a
+    ///     )),
+    ///     addr
+    /// );
+    /// ```
+    #[inline]
+    fn from(octets: [u8; 16]) -> IpAddr {
+        IpAddr::V6(Ipv6Addr::from(octets))
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "ip_from_slice", since = "1.17.0"))]
+impl From<[u16; 8]> for IpAddr {
+    /// Creates an `IpAddr::V6` from an eight element 16-bit array.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::net::{IpAddr, Ipv6Addr};
+    ///
+    /// let addr = IpAddr::from([
+    ///     525u16, 524u16, 523u16, 522u16,
+    ///     521u16, 520u16, 519u16, 518u16,
+    /// ]);
+    /// assert_eq!(
+    ///     IpAddr::V6(Ipv6Addr::new(
+    ///         0x20d, 0x20c,
+    ///         0x20b, 0x20a,
+    ///         0x209, 0x208,
+    ///         0x207, 0x206
+    ///     )),
+    ///     addr
+    /// );
+    /// ```
+    #[inline]
+    fn from(segments: [u16; 8]) -> IpAddr {
+        IpAddr::V6(Ipv6Addr::from(segments))
+    }
+}
diff --git a/vendor/rustix/src/net/mod.rs b/vendor/rustix/src/net/mod.rs
new file mode 100644
index 000000000..24fe06dc3
--- /dev/null
+++ b/vendor/rustix/src/net/mod.rs
@@ -0,0 +1,48 @@
+//! Network-related operations.
+//!
+//! On Windows, one must call [`wsa_startup`] in the process before calling any
+//! of these APIs. [`wsa_cleanup`] may be used in the process if these APIs are
+//! no longer needed.
+//!
+//! [`wsa_startup`]: https://docs.rs/rustix/latest/x86_64-pc-windows-msvc/rustix/net/fn.wsa_startup.html
+//! [`wsa_cleanup`]: https://docs.rs/rustix/latest/x86_64-pc-windows-msvc/rustix/net/fn.wsa_cleanup.html
+
+#[cfg(not(feature = "std"))]
+mod addr;
+#[cfg(not(feature = "std"))]
+mod ip;
+mod send_recv;
+mod socket;
+mod socket_addr_any;
+#[cfg(not(any(windows, target_os = "wasi")))]
+mod socketpair;
+#[cfg(windows)]
+mod wsa;
+
+pub mod sockopt;
+
+pub use send_recv::{
+    recv, recvfrom, send, sendto, sendto_any, sendto_v4, sendto_v6, RecvFlags, SendFlags,
+};
+pub use socket::{
+    accept, accept_with, acceptfrom, acceptfrom_with, bind, bind_any, bind_v4, bind_v6, connect,
+    connect_any, connect_v4, connect_v6, getpeername, getsockname, listen, shutdown, socket,
+    socket_with, AcceptFlags, AddressFamily, Protocol, Shutdown, SocketFlags, SocketType,
+};
+pub use socket_addr_any::{SocketAddrAny, SocketAddrStorage};
+#[cfg(not(any(windows, target_os = "wasi")))]
+pub use socketpair::socketpair;
+#[cfg(feature = "std")]
+pub use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAddrV6};
+#[cfg(windows)]
+pub use wsa::{wsa_cleanup, wsa_startup};
+#[cfg(not(feature = "std"))]
+pub use {
+    addr::{SocketAddr, SocketAddrV4, SocketAddrV6},
+    ip::{IpAddr, Ipv4Addr, Ipv6Addr, Ipv6MulticastScope},
+};
+#[cfg(unix)]
+pub use {
+    send_recv::sendto_unix,
+    socket::{bind_unix, connect_unix, SocketAddrUnix},
+};
diff --git a/vendor/rustix/src/net/send_recv.rs b/vendor/rustix/src/net/send_recv.rs
new file mode 100644
index 000000000..83ccc79d4
--- /dev/null
+++ b/vendor/rustix/src/net/send_recv.rs
@@ -0,0 +1,210 @@
+//! `recv` and `send`, and variants.
+
+#[cfg(unix)]
+use crate::net::SocketAddrUnix;
+use crate::net::{SocketAddr, SocketAddrAny, SocketAddrV4, SocketAddrV6};
+use crate::{imp, io};
+use imp::fd::{AsFd, BorrowedFd};
+
+pub use imp::net::send_recv::{RecvFlags, SendFlags};
+
+/// `recv(fd, buf, flags)`—Reads data from a socket.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/recv.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/recv.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/recv.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-recv
+#[inline]
+pub fn recv<Fd: AsFd>(fd: Fd, buf: &mut [u8], flags: RecvFlags) -> io::Result<usize> {
+    imp::net::syscalls::recv(fd.as_fd(), buf, flags)
+}
+
+/// `send(fd, buf, flags)`—Writes data to a socket.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/send.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/send.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/send.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-send
+#[inline]
+pub fn send<Fd: AsFd>(fd: Fd, buf: &[u8], flags: SendFlags) -> io::Result<usize> {
+    imp::net::syscalls::send(fd.as_fd(), buf, flags)
+}
+
+/// `recvfrom(fd, buf, flags, addr, len)`—Reads data from a socket and
+/// returns the sender address.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/recvfrom.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/recvfrom.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/recvfrom.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-recvfrom
+#[inline]
+pub fn recvfrom<Fd: AsFd>(
+    fd: Fd,
+    buf: &mut [u8],
+    flags: RecvFlags,
+) -> io::Result<(usize, Option<SocketAddrAny>)> {
+    imp::net::syscalls::recvfrom(fd.as_fd(), buf, flags)
+}
+
+/// `sendto(fd, buf, flags, addr)`—Writes data to a socket to a specific IP
+/// address.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/sendto.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/sendto.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/sendto.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-sendto
+pub fn sendto<Fd: AsFd>(
+    fd: Fd,
+    buf: &[u8],
+    flags: SendFlags,
+    addr: &SocketAddr,
+) -> io::Result<usize> {
+    _sendto(fd.as_fd(), buf, flags, addr)
+}
+
+fn _sendto(
+    fd: BorrowedFd<'_>,
+    buf: &[u8],
+    flags: SendFlags,
+    addr: &SocketAddr,
+) -> io::Result<usize> {
+    match addr {
+        SocketAddr::V4(v4) => imp::net::syscalls::sendto_v4(fd, buf, flags, v4),
+        SocketAddr::V6(v6) => imp::net::syscalls::sendto_v6(fd, buf, flags, v6),
+    }
+}
+
+/// `sendto(fd, buf, flags, addr)`—Writes data to a socket to a specific
+/// address.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/sendto.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/sendto.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/sendto.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-sendto
+pub fn sendto_any<Fd: AsFd>(
+    fd: Fd,
+    buf: &[u8],
+    flags: SendFlags,
+    addr: &SocketAddrAny,
+) -> io::Result<usize> {
+    _sendto_any(fd.as_fd(), buf, flags, addr)
+}
+
+fn _sendto_any(
+    fd: BorrowedFd<'_>,
+    buf: &[u8],
+    flags: SendFlags,
+    addr: &SocketAddrAny,
+) -> io::Result<usize> {
+    match addr {
+        SocketAddrAny::V4(v4) => imp::net::syscalls::sendto_v4(fd, buf, flags, v4),
+        SocketAddrAny::V6(v6) => imp::net::syscalls::sendto_v6(fd, buf, flags, v6),
+        #[cfg(unix)]
+        SocketAddrAny::Unix(unix) => imp::net::syscalls::sendto_unix(fd, buf, flags, unix),
+    }
+}
+
+/// `sendto(fd, buf, flags, addr, sizeof(struct sockaddr_in))`—Writes data to
+/// a socket to a specific IPv4 address.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/sendto.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/sendto.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/sendto.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-sendto
+#[inline]
+#[doc(alias = "sendto")]
+pub fn sendto_v4<Fd: AsFd>(
+    fd: Fd,
+    buf: &[u8],
+    flags: SendFlags,
+    addr: &SocketAddrV4,
+) -> io::Result<usize> {
+    imp::net::syscalls::sendto_v4(fd.as_fd(), buf, flags, addr)
+}
+
+/// `sendto(fd, buf, flags, addr, sizeof(struct sockaddr_in6))`—Writes data
+/// to a socket to a specific IPv6 address.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/sendto.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/sendto.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/sendto.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-sendto
+#[inline]
+#[doc(alias = "sendto")]
+pub fn sendto_v6<Fd: AsFd>(
+    fd: Fd,
+    buf: &[u8],
+    flags: SendFlags,
+    addr: &SocketAddrV6,
+) -> io::Result<usize> {
+    imp::net::syscalls::sendto_v6(fd.as_fd(), buf, flags, addr)
+}
+
+/// `sendto(fd, buf, flags, addr, sizeof(struct sockaddr_un))`—Writes data to
+/// a socket to a specific Unix-domain socket address.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/sendto.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/sendto.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/sendto.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-sendto
+#[cfg(unix)]
+#[inline]
+#[doc(alias = "sendto")]
+pub fn sendto_unix<Fd: AsFd>(
+    fd: Fd,
+    buf: &[u8],
+    flags: SendFlags,
+    addr: &SocketAddrUnix,
+) -> io::Result<usize> {
+    imp::net::syscalls::sendto_unix(fd.as_fd(), buf, flags, addr)
+}
+
+// TODO: `recvmsg`, `sendmsg`
diff --git a/vendor/rustix/src/net/socket.rs b/vendor/rustix/src/net/socket.rs
new file mode 100644
index 000000000..cd8f149f6
--- /dev/null
+++ b/vendor/rustix/src/net/socket.rs
@@ -0,0 +1,439 @@
+use crate::imp;
+use crate::io::{self, OwnedFd};
+use crate::net::{SocketAddr, SocketAddrAny, SocketAddrV4, SocketAddrV6};
+use imp::fd::{AsFd, BorrowedFd};
+
+#[cfg(unix)]
+pub use imp::net::addr::SocketAddrUnix;
+pub use imp::net::types::{
+    AcceptFlags, AddressFamily, Protocol, Shutdown, SocketFlags, SocketType,
+};
+
+impl Default for Protocol {
+    #[inline]
+    fn default() -> Self {
+        Self::IP
+    }
+}
+
+/// `socket(domain, type_, protocol)`—Creates a socket.
+///
+/// POSIX guarantees that `socket` will use the lowest unused file descriptor,
+/// however it is not safe in general to rely on this, as file descriptors
+/// may be unexpectedly allocated on other threads or in libraries.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/socket.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/socket.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/socket.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-socket
+#[inline]
+pub fn socket(domain: AddressFamily, type_: SocketType, protocol: Protocol) -> io::Result<OwnedFd> {
+    imp::net::syscalls::socket(domain, type_, protocol)
+}
+
+/// `socket_with(domain, type_ | flags, protocol)`—Creates a socket, with
+/// flags.
+///
+/// POSIX guarantees that `socket` will use the lowest unused file descriptor,
+/// however it is not safe in general to rely on this, as file descriptors
+/// may be unexpectedly allocated on other threads or in libraries.
+///
+/// `socket_with` is the same as [`socket`] but adds an additional flags
+/// operand.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/socket.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/socket.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/socket.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-socket
+#[inline]
+pub fn socket_with(
+    domain: AddressFamily,
+    type_: SocketType,
+    flags: SocketFlags,
+    protocol: Protocol,
+) -> io::Result<OwnedFd> {
+    imp::net::syscalls::socket_with(domain, type_, flags, protocol)
+}
+
+/// `bind(sockfd, addr)`—Binds a socket to an IP address.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/bind.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/bind.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/bind.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-bind
+pub fn bind<Fd: AsFd>(sockfd: Fd, addr: &SocketAddr) -> io::Result<()> {
+    _bind(sockfd.as_fd(), addr)
+}
+
+fn _bind(sockfd: BorrowedFd<'_>, addr: &SocketAddr) -> io::Result<()> {
+    match addr {
+        SocketAddr::V4(v4) => imp::net::syscalls::bind_v4(sockfd, v4),
+        SocketAddr::V6(v6) => imp::net::syscalls::bind_v6(sockfd, v6),
+    }
+}
+
+/// `bind(sockfd, addr)`—Binds a socket to an address.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/bind.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/bind.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/bind.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-bind
+#[doc(alias = "bind")]
+pub fn bind_any<Fd: AsFd>(sockfd: Fd, addr: &SocketAddrAny) -> io::Result<()> {
+    _bind_any(sockfd.as_fd(), addr)
+}
+
+fn _bind_any(sockfd: BorrowedFd<'_>, addr: &SocketAddrAny) -> io::Result<()> {
+    match addr {
+        SocketAddrAny::V4(v4) => imp::net::syscalls::bind_v4(sockfd, v4),
+        SocketAddrAny::V6(v6) => imp::net::syscalls::bind_v6(sockfd, v6),
+        #[cfg(unix)]
+        SocketAddrAny::Unix(unix) => imp::net::syscalls::bind_unix(sockfd, unix),
+    }
+}
+
+/// `bind(sockfd, addr, sizeof(struct sockaddr_in))`—Binds a socket to an
+/// IPv4 address.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/bind.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/bind.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/bind.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-bind
+#[inline]
+#[doc(alias = "bind")]
+pub fn bind_v4<Fd: AsFd>(sockfd: Fd, addr: &SocketAddrV4) -> io::Result<()> {
+    imp::net::syscalls::bind_v4(sockfd.as_fd(), addr)
+}
+
+/// `bind(sockfd, addr, sizeof(struct sockaddr_in6))`—Binds a socket to an
+/// IPv6 address.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/bind.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/bind.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/bind.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-bind
+#[inline]
+#[doc(alias = "bind")]
+pub fn bind_v6<Fd: AsFd>(sockfd: Fd, addr: &SocketAddrV6) -> io::Result<()> {
+    imp::net::syscalls::bind_v6(sockfd.as_fd(), addr)
+}
+
+/// `bind(sockfd, addr, sizeof(struct sockaddr_un))`—Binds a socket to a
+/// Unix-domain address.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/bind.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/bind.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/bind.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-bind
+#[cfg(unix)]
+#[inline]
+#[doc(alias = "bind")]
+pub fn bind_unix<Fd: AsFd>(sockfd: Fd, addr: &SocketAddrUnix) -> io::Result<()> {
+    imp::net::syscalls::bind_unix(sockfd.as_fd(), addr)
+}
+
+/// `connect(sockfd, addr)`—Initiates a connection to an IP address.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/connect.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/connect.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/connect.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-connect
+pub fn connect<Fd: AsFd>(sockfd: Fd, addr: &SocketAddr) -> io::Result<()> {
+    _connect(sockfd.as_fd(), addr)
+}
+
+fn _connect(sockfd: BorrowedFd<'_>, addr: &SocketAddr) -> io::Result<()> {
+    match addr {
+        SocketAddr::V4(v4) => imp::net::syscalls::connect_v4(sockfd, v4),
+        SocketAddr::V6(v6) => imp::net::syscalls::connect_v6(sockfd, v6),
+    }
+}
+
+/// `connect(sockfd, addr)`—Initiates a connection.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/connect.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/connect.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/connect.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-connect
+#[doc(alias = "connect")]
+pub fn connect_any<Fd: AsFd>(sockfd: Fd, addr: &SocketAddrAny) -> io::Result<()> {
+    _connect_any(sockfd.as_fd(), addr)
+}
+
+fn _connect_any(sockfd: BorrowedFd<'_>, addr: &SocketAddrAny) -> io::Result<()> {
+    match addr {
+        SocketAddrAny::V4(v4) => imp::net::syscalls::connect_v4(sockfd, v4),
+        SocketAddrAny::V6(v6) => imp::net::syscalls::connect_v6(sockfd, v6),
+        #[cfg(unix)]
+        SocketAddrAny::Unix(unix) => imp::net::syscalls::connect_unix(sockfd, unix),
+    }
+}
+
+/// `connect(sockfd, addr, sizeof(struct sockaddr_in))`—Initiates a
+/// connection to an IPv4 address.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/connect.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/connect.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/connect.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-connect
+#[inline]
+#[doc(alias = "connect")]
+pub fn connect_v4<Fd: AsFd>(sockfd: Fd, addr: &SocketAddrV4) -> io::Result<()> {
+    imp::net::syscalls::connect_v4(sockfd.as_fd(), addr)
+}
+
+/// `connect(sockfd, addr, sizeof(struct sockaddr_in6))`—Initiates a
+/// connection to an IPv6 address.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/connect.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/connect.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/connect.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-connect
+#[inline]
+#[doc(alias = "connect")]
+pub fn connect_v6<Fd: AsFd>(sockfd: Fd, addr: &SocketAddrV6) -> io::Result<()> {
+    imp::net::syscalls::connect_v6(sockfd.as_fd(), addr)
+}
+
+/// `connect(sockfd, addr, sizeof(struct sockaddr_un))`—Initiates a
+/// connection to a Unix-domain address.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/connect.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/connect.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/connect.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-connect
+#[cfg(unix)]
+#[inline]
+#[doc(alias = "connect")]
+pub fn connect_unix<Fd: AsFd>(sockfd: Fd, addr: &SocketAddrUnix) -> io::Result<()> {
+    imp::net::syscalls::connect_unix(sockfd.as_fd(), addr)
+}
+
+/// `listen(fd, backlog)`—Enables listening for incoming connections.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/listen.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/listen.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/listen.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-listen
+#[inline]
+pub fn listen<Fd: AsFd>(sockfd: Fd, backlog: i32) -> io::Result<()> {
+    imp::net::syscalls::listen(sockfd.as_fd(), backlog)
+}
+
+/// `accept(fd, NULL, NULL)`—Accepts an incoming connection.
+///
+/// Use [`acceptfrom`] to retrieve the peer address.
+///
+/// POSIX guarantees that `accept` will use the lowest unused file descriptor,
+/// however it is not safe in general to rely on this, as file descriptors may
+/// be unexpectedly allocated on other threads or in libraries.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/accept.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/accept.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/accept.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-accept
+#[inline]
+#[doc(alias = "accept4")]
+pub fn accept<Fd: AsFd>(sockfd: Fd) -> io::Result<OwnedFd> {
+    imp::net::syscalls::accept(sockfd.as_fd())
+}
+
+/// `accept4(fd, NULL, NULL, flags)`—Accepts an incoming connection, with
+/// flags.
+///
+/// Use [`acceptfrom_with`] to retrieve the peer address.
+///
+/// Even though POSIX guarantees that this will use the lowest unused file
+/// descriptor, it is not safe in general to rely on this, as file descriptors
+/// may be unexpectedly allocated on other threads or in libraries.
+///
+/// `accept_with` is the same as [`accept`] but adds an additional flags
+/// operand.
+///
+/// # References
+///  - [Linux]
+///
+/// [Linux]: https://man7.org/linux/man-pages/man2/accept4.2.html
+#[inline]
+#[doc(alias = "accept4")]
+pub fn accept_with<Fd: AsFd>(sockfd: Fd, flags: AcceptFlags) -> io::Result<OwnedFd> {
+    imp::net::syscalls::accept_with(sockfd.as_fd(), flags)
+}
+
+/// `accept(fd, &addr, &len)`—Accepts an incoming connection and returns the
+/// peer address.
+///
+/// Use [`accept`] if the peer address isn't needed.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/accept.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/accept.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/accept.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-accept
+#[inline]
+#[doc(alias = "accept4")]
+pub fn acceptfrom<Fd: AsFd>(sockfd: Fd) -> io::Result<(OwnedFd, Option<SocketAddrAny>)> {
+    imp::net::syscalls::acceptfrom(sockfd.as_fd())
+}
+
+/// `accept4(fd, &addr, &len, flags)`—Accepts an incoming connection and
+/// returns the peer address, with flags.
+///
+/// Use [`accept_with`] if the peer address isn't needed.
+///
+/// `acceptfrom_with` is the same as [`acceptfrom`] but adds an additional
+/// flags operand.
+///
+/// # References
+///  - [Linux]
+///
+/// [Linux]: https://man7.org/linux/man-pages/man2/accept4.2.html
+#[inline]
+#[doc(alias = "accept4")]
+pub fn acceptfrom_with<Fd: AsFd>(
+    sockfd: Fd,
+    flags: AcceptFlags,
+) -> io::Result<(OwnedFd, Option<SocketAddrAny>)> {
+    imp::net::syscalls::acceptfrom_with(sockfd.as_fd(), flags)
+}
+
+/// `shutdown(fd, how)`—Closes the read and/or write sides of a stream.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/shutdown.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/shutdown.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/shutdown.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-shutdown
+#[inline]
+pub fn shutdown<Fd: AsFd>(sockfd: Fd, how: Shutdown) -> io::Result<()> {
+    imp::net::syscalls::shutdown(sockfd.as_fd(), how)
+}
+
+/// `getsockname(fd, addr, len)`—Returns the address a socket is bound to.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/getsockname.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/getsockname.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/getsockname.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-getsockname
+#[inline]
+pub fn getsockname<Fd: AsFd>(sockfd: Fd) -> io::Result<SocketAddrAny> {
+    imp::net::syscalls::getsockname(sockfd.as_fd())
+}
+
+/// `getpeername(fd, addr, len)`—Returns the address a socket is connected
+/// to.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Apple]
+///  - [Winsock2]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/getpeername.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/getpeername.2.html
+/// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/getpeername.2.html
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-getpeername
+#[inline]
+pub fn getpeername<Fd: AsFd>(sockfd: Fd) -> io::Result<Option<SocketAddrAny>> {
+    imp::net::syscalls::getpeername(sockfd.as_fd())
+}
diff --git a/vendor/rustix/src/net/socket_addr_any.rs b/vendor/rustix/src/net/socket_addr_any.rs
new file mode 100644
index 000000000..4970dbf74
--- /dev/null
+++ b/vendor/rustix/src/net/socket_addr_any.rs
@@ -0,0 +1,81 @@
+//! A socket address for any kind of socket.
+//!
+//! This is similar to [`std::net::SocketAddr`], but also supports Unix-domain
+//! socket addresses.
+//!
+//! # Safety
+//!
+//! The `read` and `write` functions allow decoding and encoding from and to
+//! OS-specific socket address representations in memory.
+#![allow(unsafe_code)]
+
+#[cfg(unix)]
+use crate::net::SocketAddrUnix;
+use crate::net::{AddressFamily, SocketAddrV4, SocketAddrV6};
+use crate::{imp, io};
+#[cfg(feature = "std")]
+use core::fmt;
+
+pub use imp::net::addr::SocketAddrStorage;
+
+/// `struct sockaddr_storage` as a Rust enum.
+#[derive(Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
+#[doc(alias = "sockaddr")]
+#[non_exhaustive]
+pub enum SocketAddrAny {
+    /// `struct sockaddr_in`
+    V4(SocketAddrV4),
+    /// `struct sockaddr_in6`
+    V6(SocketAddrV6),
+    /// `struct sockaddr_un`
+    #[cfg(unix)]
+    Unix(SocketAddrUnix),
+}
+
+impl SocketAddrAny {
+    /// Return the address family of this socket address.
+    #[inline]
+    pub const fn address_family(&self) -> AddressFamily {
+        match self {
+            SocketAddrAny::V4(_) => AddressFamily::INET,
+            SocketAddrAny::V6(_) => AddressFamily::INET6,
+            #[cfg(unix)]
+            SocketAddrAny::Unix(_) => AddressFamily::UNIX,
+        }
+    }
+
+    /// Writes a platform-specific encoding of this socket address to
+    /// the memory pointed to by `storage`, and returns the number of
+    /// bytes used.
+    ///
+    /// # Safety
+    ///
+    /// `storage` must point to valid memory for encoding the socket
+    /// address.
+    pub unsafe fn write(&self, storage: *mut SocketAddrStorage) -> usize {
+        imp::net::write_sockaddr::write_sockaddr(self, storage)
+    }
+
+    /// Reads a platform-specific encoding of a socket address from
+    /// the memory pointed to by `storage`, which uses `len` bytes.
+    ///
+    /// # Safety
+    ///
+    /// `storage` must point to valid memory for decoding a socket
+    /// address.
+    pub unsafe fn read(storage: *const SocketAddrStorage, len: usize) -> io::Result<Self> {
+        imp::net::read_sockaddr::read_sockaddr(storage, len)
+    }
+}
+
+#[cfg(feature = "std")]
+impl fmt::Debug for SocketAddrAny {
+    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            SocketAddrAny::V4(v4) => v4.fmt(fmt),
+            SocketAddrAny::V6(v6) => v6.fmt(fmt),
+            #[cfg(unix)]
+            SocketAddrAny::Unix(unix) => unix.fmt(fmt),
+        }
+    }
+}
diff --git a/vendor/rustix/src/net/socketpair.rs b/vendor/rustix/src/net/socketpair.rs
new file mode 100644
index 000000000..68a58f3e9
--- /dev/null
+++ b/vendor/rustix/src/net/socketpair.rs
@@ -0,0 +1,21 @@
+use crate::imp;
+use crate::io::{self, OwnedFd};
+use crate::net::{AddressFamily, Protocol, SocketFlags, SocketType};
+
+/// `socketpair(domain, type_ | accept_flags, protocol)`
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/socketpair.html
+/// [Linux]: https://man7.org/linux/man-pages/man2/socketpair.2.html
+#[inline]
+pub fn socketpair(
+    domain: AddressFamily,
+    type_: SocketType,
+    flags: SocketFlags,
+    protocol: Protocol,
+) -> io::Result<(OwnedFd, OwnedFd)> {
+    imp::net::syscalls::socketpair(domain, type_, flags, protocol)
+}
diff --git a/vendor/rustix/src/net/sockopt.rs b/vendor/rustix/src/net/sockopt.rs
new file mode 100644
index 000000000..f5b149b37
--- /dev/null
+++ b/vendor/rustix/src/net/sockopt.rs
@@ -0,0 +1,600 @@
+//! `getsockopt` and `setsockopt` functions.
+//!
+//! In the rustix API, there is a separate function for each option, so that
+//! it can be given an option-specific type signature.
+
+#![doc(alias = "getsockopt")]
+#![doc(alias = "setsockopt")]
+
+use crate::net::{Ipv4Addr, Ipv6Addr, SocketType};
+use crate::{imp, io};
+use core::time::Duration;
+use imp::fd::AsFd;
+
+pub use imp::net::types::Timeout;
+
+/// `getsockopt(fd, SOL_SOCKET, SO_TYPE)`—Returns the type of a socket.
+///
+/// # References
+///  - [POSIX `getsockopt`]
+///  - [POSIX `sys/socket.h`]
+///  - [Linux `getsockopt`]
+///  - [Linux `socket`]
+///  - [Winsock2 `getsockopt`]
+///  - [Winsock2 `SOL_SOCKET` options]
+///
+/// [POSIX `getsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/getsockopt.html
+/// [POSIX `sys/socket.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_socket.h.html
+/// [Linux `getsockopt`]: https://man7.org/linux/man-pages/man2/getsockopt.2.html
+/// [Linux `socket`]: https://man7.org/linux/man-pages/man7/socket.7.html
+/// [Winsock2 `getsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-getsockopt
+/// [Winsock2 `SOL_SOCKET` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/sol-socket-socket-options
+#[inline]
+#[doc(alias = "SO_TYPE")]
+pub fn get_socket_type<Fd: AsFd>(fd: Fd) -> io::Result<SocketType> {
+    imp::net::syscalls::sockopt::get_socket_type(fd.as_fd())
+}
+
+/// `setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, value)`
+///
+/// # References
+///  - [POSIX `setsockopt`]
+///  - [POSIX `sys/socket.h`]
+///  - [Linux `setsockopt`]
+///  - [Linux `socket`]
+///  - [Winsock2 `setsockopt`]
+///  - [Winsock2 `SOL_SOCKET` options]
+///
+/// [POSIX `setsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/setsockopt.html
+/// [POSIX `sys/socket.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_socket.h.html
+/// [Linux `setsockopt`]: https://man7.org/linux/man-pages/man2/setsockopt.2.html
+/// [Linux `socket`]: https://man7.org/linux/man-pages/man7/socket.7.html
+/// [Winsock2 `setsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-setsockopt
+/// [Winsock2 `SOL_SOCKET` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/sol-socket-socket-options
+#[inline]
+#[doc(alias = "SO_REUSEADDR")]
+pub fn set_socket_reuseaddr<Fd: AsFd>(fd: Fd, value: bool) -> io::Result<()> {
+    imp::net::syscalls::sockopt::set_socket_reuseaddr(fd.as_fd(), value)
+}
+
+/// `setsockopt(fd, SOL_SOCKET, SO_BROADCAST, broadcast)`
+///
+/// # References
+///  - [POSIX `setsockopt`]
+///  - [POSIX `sys/socket.h`]
+///  - [Linux `setsockopt`]
+///  - [Linux `socket`]
+///  - [Winsock2 `setsockopt`]
+///  - [Winsock2 `SOL_SOCKET` options]
+///
+/// [POSIX `setsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/setsockopt.html
+/// [POSIX `sys/socket.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_socket.h.html
+/// [Linux `setsockopt`]: https://man7.org/linux/man-pages/man2/setsockopt.2.html
+/// [Linux `socket`]: https://man7.org/linux/man-pages/man7/socket.7.html
+/// [Winsock2 `setsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-setsockopt
+/// [Winsock2 `SOL_SOCKET` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/sol-socket-socket-options
+#[inline]
+#[doc(alias = "SO_BROADCAST")]
+pub fn set_socket_broadcast<Fd: AsFd>(fd: Fd, broadcast: bool) -> io::Result<()> {
+    imp::net::syscalls::sockopt::set_socket_broadcast(fd.as_fd(), broadcast)
+}
+
+/// `getsockopt(fd, SOL_SOCKET, SO_BROADCAST)`
+///
+/// # References
+///  - [POSIX `getsockopt`]
+///  - [POSIX `sys/socket.h`]
+///  - [Linux `getsockopt`]
+///  - [Linux `socket`]
+///  - [Winsock2 `getsockopt`]
+///  - [Winsock2 `SOL_SOCKET` options]
+///
+/// [POSIX `getsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/getsockopt.html
+/// [POSIX `sys/socket.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_socket.h.html
+/// [Linux `getsockopt`]: https://man7.org/linux/man-pages/man2/getsockopt.2.html
+/// [Linux `socket`]: https://man7.org/linux/man-pages/man7/socket.7.html
+/// [Winsock2 `getsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-getsockopt
+/// [Winsock2 `SOL_SOCKET` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/sol-socket-socket-options
+#[inline]
+#[doc(alias = "SO_BROADCAST")]
+pub fn get_socket_broadcast<Fd: AsFd>(fd: Fd) -> io::Result<bool> {
+    imp::net::syscalls::sockopt::get_socket_broadcast(fd.as_fd())
+}
+
+/// `setsockopt(fd, SOL_SOCKET, SO_LINGER, linger)`
+///
+/// # References
+///  - [POSIX `setsockopt`]
+///  - [POSIX `sys/socket.h`]
+///  - [Linux `setsockopt`]
+///  - [Linux `socket`]
+///  - [Winsock2 `setsockopt`]
+///  - [Winsock2 `SOL_SOCKET` options]
+///
+/// [POSIX `setsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/setsockopt.html
+/// [POSIX `sys/socket.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_socket.h.html
+/// [Linux `setsockopt`]: https://man7.org/linux/man-pages/man2/setsockopt.2.html
+/// [Linux `socket`]: https://man7.org/linux/man-pages/man7/socket.7.html
+/// [Winsock2 `setsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-setsockopt
+/// [Winsock2 `SOL_SOCKET` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/sol-socket-socket-options
+#[inline]
+#[doc(alias = "SO_LINGER")]
+pub fn set_socket_linger<Fd: AsFd>(fd: Fd, linger: Option<Duration>) -> io::Result<()> {
+    imp::net::syscalls::sockopt::set_socket_linger(fd.as_fd(), linger)
+}
+
+/// `getsockopt(fd, SOL_SOCKET, SO_LINGER)`
+///
+/// # References
+///  - [POSIX `getsockopt`]
+///  - [POSIX `sys/socket.h`]
+///  - [Linux `getsockopt`]
+///  - [Linux `socket`]
+///  - [Winsock2 `getsockopt`]
+///  - [Winsock2 `SOL_SOCKET` options]
+///
+/// [POSIX `getsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/getsockopt.html
+/// [POSIX `sys/socket.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_socket.h.html
+/// [Linux `getsockopt`]: https://man7.org/linux/man-pages/man2/getsockopt.2.html
+/// [Linux `socket`]: https://man7.org/linux/man-pages/man7/socket.7.html
+/// [Winsock2 `getsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-getsockopt
+/// [Winsock2 `SOL_SOCKET` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/sol-socket-socket-options
+#[inline]
+#[doc(alias = "SO_LINGER")]
+pub fn get_socket_linger<Fd: AsFd>(fd: Fd) -> io::Result<Option<Duration>> {
+    imp::net::syscalls::sockopt::get_socket_linger(fd.as_fd())
+}
+
+/// `setsockopt(fd, SOL_SOCKET, SO_PASSCRED, passcred)`
+///
+/// # References
+///  - [Linux `setsockopt`]
+///  - [Linux `socket`]
+///
+/// [Linux `setsockopt`]: https://man7.org/linux/man-pages/man2/setsockopt.2.html
+/// [Linux `socket`]: https://man7.org/linux/man-pages/man7/socket.7.html
+#[cfg(any(target_os = "android", target_os = "linux"))]
+#[inline]
+#[doc(alias = "SO_PASSCRED")]
+pub fn set_socket_passcred<Fd: AsFd>(fd: Fd, passcred: bool) -> io::Result<()> {
+    imp::net::syscalls::sockopt::set_socket_passcred(fd.as_fd(), passcred)
+}
+
+/// `getsockopt(fd, SOL_SOCKET, SO_PASSCRED)`
+///
+/// # References
+///  - [Linux `getsockopt`]
+///  - [Linux `socket`]
+///
+/// [Linux `getsockopt`]: https://man7.org/linux/man-pages/man2/getsockopt.2.html
+/// [Linux `socket`]: https://man7.org/linux/man-pages/man7/socket.7.html
+#[cfg(any(target_os = "android", target_os = "linux"))]
+#[inline]
+#[doc(alias = "SO_PASSCRED")]
+pub fn get_socket_passcred<Fd: AsFd>(fd: Fd) -> io::Result<bool> {
+    imp::net::syscalls::sockopt::get_socket_passcred(fd.as_fd())
+}
+
+/// `setsockopt(fd, SOL_SOCKET, id, timeout)`—Set the sending
+/// or receiving timeout.
+///
+/// # References
+///  - [POSIX `setsockopt`]
+///  - [POSIX `sys/socket.h`]
+///  - [Linux `setsockopt`]
+///  - [Linux `socket`]
+///  - [Winsock2 `setsockopt`]
+///  - [Winsock2 `SOL_SOCKET` options]
+///
+/// [POSIX `setsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/setsockopt.html
+/// [POSIX `sys/socket.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_socket.h.html
+/// [Linux `setsockopt`]: https://man7.org/linux/man-pages/man2/setsockopt.2.html
+/// [Linux `socket`]: https://man7.org/linux/man-pages/man7/socket.7.html
+/// [Winsock2 `setsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-setsockopt
+/// [Winsock2 `SOL_SOCKET` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/sol-socket-socket-options
+#[inline]
+#[doc(alias = "SO_RCVTIMEO")]
+#[doc(alias = "SO_SNDTIMEO")]
+pub fn set_socket_timeout<Fd: AsFd>(
+    fd: Fd,
+    id: Timeout,
+    timeout: Option<Duration>,
+) -> io::Result<()> {
+    imp::net::syscalls::sockopt::set_socket_timeout(fd.as_fd(), id, timeout)
+}
+
+/// `getsockopt(fd, SOL_SOCKET, id)`—Get the sending or receiving timeout.
+///
+/// # References
+///  - [POSIX `getsockopt`]
+///  - [POSIX `sys/socket.h`]
+///  - [Linux `getsockopt`]
+///  - [Linux `socket`]
+///  - [Winsock2 `getsockopt`]
+///  - [Winsock2 `SOL_SOCKET` options]
+///
+/// [POSIX `getsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/getsockopt.html
+/// [POSIX `sys/socket.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_socket.h.html
+/// [Linux `getsockopt`]: https://man7.org/linux/man-pages/man2/getsockopt.2.html
+/// [Linux `socket`]: https://man7.org/linux/man-pages/man7/socket.7.html
+/// [Winsock2 `getsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-getsockopt
+/// [Winsock2 `SOL_SOCKET` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/sol-socket-socket-options
+#[inline]
+#[doc(alias = "SO_RCVTIMEO")]
+#[doc(alias = "SO_SNDTIMEO")]
+pub fn get_socket_timeout<Fd: AsFd>(fd: Fd, id: Timeout) -> io::Result<Option<Duration>> {
+    imp::net::syscalls::sockopt::get_socket_timeout(fd.as_fd(), id)
+}
+
+/// `setsockopt(fd, IPPROTO_IP, IP_TTL, ttl)`
+///
+/// # References
+///  - [POSIX `setsockopt`]
+///  - [POSIX `netinet/in.h`]
+///  - [Linux `setsockopt`]
+///  - [Linux `ip`]
+///  - [Winsock2 `setsockopt`]
+///  - [Winsock2 `IPPROTO_IP` options]
+///
+/// [POSIX `setsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/setsockopt.html
+/// [Linux `setsockopt`]: https://man7.org/linux/man-pages/man2/setsockopt.2.html
+/// [Linux `ip`]: https://man7.org/linux/man-pages/man7/ip.7.html
+/// [Winsock2 `setsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-setsockopt
+/// [Winsock2 `IPPROTO_IP` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/ipproto-ip-socket-options
+#[inline]
+#[doc(alias = "IP_TTL")]
+pub fn set_ip_ttl<Fd: AsFd>(fd: Fd, ttl: u32) -> io::Result<()> {
+    imp::net::syscalls::sockopt::set_ip_ttl(fd.as_fd(), ttl)
+}
+
+/// `getsockopt(fd, IPPROTO_IP, IP_TTL)`
+///
+/// # References
+///  - [POSIX `getsockopt`]
+///  - [POSIX `netinet/in.h`]
+///  - [Linux `getsockopt`]
+///  - [Linux `ip`]
+///  - [Winsock2 `getsockopt`]
+///  - [Winsock2 `IPPROTO_IPV6` options]
+///
+/// [POSIX `getsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/getsockopt.html
+/// [POSIX `netinet/in.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/netinet_in.h.html
+/// [Linux `getsockopt`]: https://man7.org/linux/man-pages/man2/getsockopt.2.html
+/// [Linux `ip`]: https://man7.org/linux/man-pages/man7/ip.7.html
+/// [Winsock2 `getsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-getsockopt
+/// [Winsock2 `IPPROTO_IP` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/ipproto-ip-socket-options
+#[inline]
+#[doc(alias = "IP_TTL")]
+pub fn get_ip_ttl<Fd: AsFd>(fd: Fd) -> io::Result<u32> {
+    imp::net::syscalls::sockopt::get_ip_ttl(fd.as_fd())
+}
+
+/// `setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, only_v6)`
+///
+/// # References
+///  - [POSIX `setsockopt`]
+///  - [POSIX `netinet/in.h`]
+///  - [Linux `setsockopt`]
+///  - [Linux `ipv6`]
+///  - [Winsock2 `setsockopt`]
+///  - [Winsock2 `IPPROTO_IPV6` options]
+///
+/// [POSIX `setsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/setsockopt.html
+/// [POSIX `netinet/in.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/netinet_in.h.html
+/// [Linux `setsockopt`]: https://man7.org/linux/man-pages/man2/setsockopt.2.html
+/// [Linux `ipv6`]: https://man7.org/linux/man-pages/man7/ipv6.7.html
+/// [Winsock2 `setsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-setsockopt
+/// [Winsock2 `IPPROTO_IPV6` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/ipproto-ipv6-socket-options
+#[inline]
+#[doc(alias = "IPV6_V6ONLY")]
+pub fn set_ipv6_v6only<Fd: AsFd>(fd: Fd, only_v6: bool) -> io::Result<()> {
+    imp::net::syscalls::sockopt::set_ipv6_v6only(fd.as_fd(), only_v6)
+}
+
+/// `getsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY)`
+///
+/// # References
+///  - [POSIX `getsockopt`]
+///  - [POSIX `netinet/in.h`]
+///  - [Linux `getsockopt`]
+///  - [Linux `ipv6`]
+///  - [Winsock2 `getsockopt`]
+///  - [Winsock2 `IPPROTO_IPV6` options]
+///
+/// [POSIX `getsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/getsockopt.html
+/// [POSIX `netinet/in.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/netinet_in.h.html
+/// [Linux `getsockopt`]: https://man7.org/linux/man-pages/man2/getsockopt.2.html
+/// [Linux `ipv6`]: https://man7.org/linux/man-pages/man7/ipv6.7.html
+/// [Winsock2 `getsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-getsockopt
+/// [Winsock2 `IPPROTO_IPV6` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/ipproto-ipv6-socket-options
+#[inline]
+#[doc(alias = "IPV6_V6ONLY")]
+pub fn get_ipv6_v6only<Fd: AsFd>(fd: Fd) -> io::Result<bool> {
+    imp::net::syscalls::sockopt::get_ipv6_v6only(fd.as_fd())
+}
+
+/// `setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, multicast_loop)`
+///
+/// # References
+///  - [POSIX `setsockopt`]
+///  - [POSIX `netinet/in.h`]
+///  - [Linux `setsockopt`]
+///  - [Linux `ip`]
+///  - [Winsock2 `setsockopt`]
+///  - [Winsock2 `IPPROTO_IP` options]
+///
+/// [POSIX `setsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/setsockopt.html
+/// [POSIX `netinet/in.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/netinet_in.h.html
+/// [Linux `setsockopt`]: https://man7.org/linux/man-pages/man2/setsockopt.2.html
+/// [Linux `ip`]: https://man7.org/linux/man-pages/man7/ip.7.html
+/// [Winsock2 `setsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-setsockopt
+/// [Winsock2 `IPPROTO_IP` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/ipproto-ip-socket-options
+#[inline]
+#[doc(alias = "IP_MULTICAST_LOOP")]
+pub fn set_ip_multicast_loop<Fd: AsFd>(fd: Fd, multicast_loop: bool) -> io::Result<()> {
+    imp::net::syscalls::sockopt::set_ip_multicast_loop(fd.as_fd(), multicast_loop)
+}
+
+/// `getsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP)`
+///
+/// # References
+///  - [POSIX `getsockopt`]
+///  - [POSIX `netinet/in.h`]
+///  - [Linux `getsockopt`]
+///  - [Linux `ip`]
+///  - [Winsock2 `getsockopt`]
+///  - [Winsock2 `IPPROTO_IP` options]
+///
+/// [POSIX `getsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/getsockopt.html
+/// [POSIX `netinet/in.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/netinet_in.h.html
+/// [Linux `getsockopt`]: https://man7.org/linux/man-pages/man2/getsockopt.2.html
+/// [Linux `ip`]: https://man7.org/linux/man-pages/man7/ip.7.html
+/// [Winsock2 `getsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-getsockopt
+/// [Winsock2 `IPPROTO_IP` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/ipproto-ip-socket-options
+#[inline]
+#[doc(alias = "IP_MULTICAST_LOOP")]
+pub fn get_ip_multicast_loop<Fd: AsFd>(fd: Fd) -> io::Result<bool> {
+    imp::net::syscalls::sockopt::get_ip_multicast_loop(fd.as_fd())
+}
+
+/// `setsockopt(fd, IPPROTO_IP, IP_MULTICAST_TTL, multicast_ttl)`
+///
+/// # References
+///  - [POSIX `setsockopt`]
+///  - [POSIX `netinet/in.h`]
+///  - [Linux `setsockopt`]
+///  - [Linux `ip`]
+///  - [Winsock2 `setsockopt`]
+///  - [Winsock2 `IPPROTO_IP` options]
+///
+/// [POSIX `setsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/setsockopt.html
+/// [POSIX `netinet/in.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/netinet_in.h.html
+/// [Linux `setsockopt`]: https://man7.org/linux/man-pages/man2/setsockopt.2.html
+/// [Linux `ip`]: https://man7.org/linux/man-pages/man7/ip.7.html
+/// [Winsock2 `setsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-setsockopt
+/// [Winsock2 `IPPROTO_IP` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/ipproto-ip-socket-options
+#[inline]
+#[doc(alias = "IP_MULTICAST_TTL")]
+pub fn set_ip_multicast_ttl<Fd: AsFd>(fd: Fd, multicast_ttl: u32) -> io::Result<()> {
+    imp::net::syscalls::sockopt::set_ip_multicast_ttl(fd.as_fd(), multicast_ttl)
+}
+
+/// `getsockopt(fd, IPPROTO_IP, IP_MULTICAST_TTL)`
+///
+/// # References
+///  - [POSIX `getsockopt`]
+///  - [POSIX `netinet/in.h`]
+///  - [Linux `getsockopt`]
+///  - [Linux `ip`]
+///  - [Winsock2 `getsockopt`]
+///  - [Winsock2 `IPPROTO_IP` options]
+///
+/// [POSIX `getsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/getsockopt.html
+/// [POSIX `netinet/in.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/netinet_in.h.html
+/// [Linux `getsockopt`]: https://man7.org/linux/man-pages/man2/getsockopt.2.html
+/// [Linux `ip`]: https://man7.org/linux/man-pages/man7/ip.7.html
+/// [Winsock2 `getsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-getsockopt
+/// [Winsock2 `IPPROTO_IP` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/ipproto-ip-socket-options
+#[inline]
+#[doc(alias = "IP_MULTICAST_TTL")]
+pub fn get_ip_multicast_ttl<Fd: AsFd>(fd: Fd) -> io::Result<u32> {
+    imp::net::syscalls::sockopt::get_ip_multicast_ttl(fd.as_fd())
+}
+
+/// `setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, multicast_loop)`
+///
+/// # References
+///  - [POSIX `setsockopt`]
+///  - [POSIX `netinet/in.h`]
+///  - [Linux `setsockopt`]
+///  - [Linux `ipv6`]
+///  - [Winsock2 `setsockopt`]
+///  - [Winsock2 `IPPROTO_IPV6` options]
+///
+/// [POSIX `setsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/setsockopt.html
+/// [POSIX `netinet/in.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/netinet_in.h.html
+/// [Linux `setsockopt`]: https://man7.org/linux/man-pages/man2/setsockopt.2.html
+/// [Linux `ipv6`]: https://man7.org/linux/man-pages/man7/ipv6.7.html
+/// [Winsock2 `setsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-setsockopt
+/// [Winsock2 `IPPROTO_IPV6` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/ipproto-ipv6-socket-options
+#[inline]
+#[doc(alias = "IPV6_MULTICAST_LOOP")]
+pub fn set_ipv6_multicast_loop<Fd: AsFd>(fd: Fd, multicast_loop: bool) -> io::Result<()> {
+    imp::net::syscalls::sockopt::set_ipv6_multicast_loop(fd.as_fd(), multicast_loop)
+}
+
+/// `getsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP)`
+///
+/// # References
+///  - [POSIX `getsockopt`]
+///  - [POSIX `netinet/in.h`]
+///  - [Linux `getsockopt`]
+///  - [Linux `ipv6`]
+///  - [Winsock2 `getsockopt`]
+///  - [Winsock2 `IPPROTO_IPV6` options]
+///
+/// [POSIX `getsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/getsockopt.html
+/// [POSIX `netinet/in.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/netinet_in.h.html
+/// [Linux `getsockopt`]: https://man7.org/linux/man-pages/man2/getsockopt.2.html
+/// [Linux `ipv6`]: https://man7.org/linux/man-pages/man7/ipv6.7.html
+/// [Winsock2 `getsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-getsockopt
+/// [Winsock2 `IPPROTO_IPV6` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/ipproto-ipv6-socket-options
+#[inline]
+#[doc(alias = "IPV6_MULTICAST_LOOP")]
+pub fn get_ipv6_multicast_loop<Fd: AsFd>(fd: Fd) -> io::Result<bool> {
+    imp::net::syscalls::sockopt::get_ipv6_multicast_loop(fd.as_fd())
+}
+
+/// `setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, multiaddr, interface)`
+///
+/// # References
+///  - [POSIX `setsockopt`]
+///  - [POSIX `netinet/in.h`]
+///  - [Linux `setsockopt`]
+///  - [Linux `ip`]
+///  - [Winsock2 `setsockopt`]
+///  - [Winsock2 `IPPROTO_IP` options]
+///
+/// [POSIX `setsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/setsockopt.html
+/// [POSIX `netinet/in.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/netinet_in.h.html
+/// [Linux `setsockopt`]: https://man7.org/linux/man-pages/man2/setsockopt.2.html
+/// [Linux `ip`]: https://man7.org/linux/man-pages/man7/ip.7.html
+/// [Winsock2 `setsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-setsockopt
+/// [Winsock2 `IPPROTO_IP` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/ipproto-ip-socket-options
+#[inline]
+#[doc(alias = "IP_ADD_MEMBERSHIP")]
+pub fn set_ip_add_membership<Fd: AsFd>(
+    fd: Fd,
+    multiaddr: &Ipv4Addr,
+    interface: &Ipv4Addr,
+) -> io::Result<()> {
+    imp::net::syscalls::sockopt::set_ip_add_membership(fd.as_fd(), multiaddr, interface)
+}
+
+/// `setsockopt(fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, multiaddr, interface)`
+///
+/// `IPV6_ADD_MEMBERSHIP` is the same as `IPV6_JOIN_GROUP` in POSIX.
+///
+/// # References
+///  - [POSIX `setsockopt`]
+///  - [POSIX `netinet/in.h`]
+///  - [Linux `setsockopt`]
+///  - [Linux `ipv6]
+///  - [Winsock2 `setsockopt`]
+///  - [Winsock2 `IPPROTO_IPV6` options]
+///
+/// [POSIX `setsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/setsockopt.html
+/// [POSIX `netinet/in.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/netinet_in.h.html
+/// [Linux `setsockopt`]: https://man7.org/linux/man-pages/man2/setsockopt.2.html
+/// [Linux `ipv6`]: https://man7.org/linux/man-pages/man7/ipv6.7.html
+/// [Winsock2 `setsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-setsockopt
+/// [Winsock2 `IPPROTO_IPV6` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/ipproto-ipv6-socket-options
+#[inline]
+#[doc(alias = "IPV6_JOIN_GROUP")]
+#[doc(alias = "IPV6_ADD_MEMBERSHIP")]
+pub fn set_ipv6_add_membership<Fd: AsFd>(
+    fd: Fd,
+    multiaddr: &Ipv6Addr,
+    interface: u32,
+) -> io::Result<()> {
+    imp::net::syscalls::sockopt::set_ipv6_add_membership(fd.as_fd(), multiaddr, interface)
+}
+
+/// `setsockopt(fd, IPPROTO_IP, IP_DROP_MEMBERSHIP, multiaddr, interface)`
+///
+/// # References
+///  - [POSIX `setsockopt`]
+///  - [POSIX `netinet/in.h`]
+///  - [Linux `setsockopt`]
+///  - [Linux `ip`]
+///  - [Winsock2 `setsockopt`]
+///  - [Winsock2 `IPPROTO_IP` options]
+///
+/// [POSIX `setsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/setsockopt.html
+/// [POSIX `netinet/in.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/netinet_in.h.html
+/// [Linux `setsockopt`]: https://man7.org/linux/man-pages/man2/setsockopt.2.html
+/// [Linux `ip`]: https://man7.org/linux/man-pages/man7/ip.7.html
+/// [Winsock2 `setsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-setsockopt
+/// [Winsock2 `IPPROTO_IP` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/ipproto-ip-socket-options
+#[inline]
+#[doc(alias = "IP_DROP_MEMBERSHIP")]
+pub fn set_ip_drop_membership<Fd: AsFd>(
+    fd: Fd,
+    multiaddr: &Ipv4Addr,
+    interface: &Ipv4Addr,
+) -> io::Result<()> {
+    imp::net::syscalls::sockopt::set_ip_drop_membership(fd.as_fd(), multiaddr, interface)
+}
+
+/// `setsockopt(fd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, multiaddr, interface)`
+///
+/// `IPV6_DROP_MEMBERSHIP` is the same as `IPV6_LEAVE_GROUP` in POSIX.
+///
+/// # References
+///  - [POSIX `setsockopt`]
+///  - [POSIX `netinet/in.h`]
+///  - [Linux `setsockopt`]
+///  - [Linux `ipv6`]
+///  - [Winsock2 `setsockopt`]
+///  - [Winsock2 `IPPROTO_IPV6` options]
+///
+/// [POSIX `setsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/setsockopt.html
+/// [POSIX `netinet/in.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/netinet_in.h.html
+/// [Linux `setsockopt`]: https://man7.org/linux/man-pages/man2/setsockopt.2.html
+/// [Linux `ipv6`]: https://man7.org/linux/man-pages/man7/ipv6.7.html
+/// [Winsock2 `setsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-setsockopt
+/// [Winsock2 `IPPROTO_IPV6` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/ipproto-ipv6-socket-options
+#[inline]
+#[doc(alias = "IPV6_LEAVE_GROUP")]
+#[doc(alias = "IPV6_DROP_MEMBERSHIP")]
+pub fn set_ipv6_drop_membership<Fd: AsFd>(
+    fd: Fd,
+    multiaddr: &Ipv6Addr,
+    interface: u32,
+) -> io::Result<()> {
+    imp::net::syscalls::sockopt::set_ipv6_drop_membership(fd.as_fd(), multiaddr, interface)
+}
+
+/// `setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, nodelay)`
+///
+/// # References
+///  - [POSIX `setsockopt`]
+///  - [POSIX `netinet/tcp.h`]
+///  - [Linux `setsockopt`]
+///  - [Linux `tcp`]
+///  - [Winsock2 `setsockopt`]
+///  - [Winsock2 `IPPROTO_TCP` options]
+///
+/// [POSIX `setsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/setsockopt.html
+/// [POSIX `netinet/tcp.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/netinet_tcp.h.html
+/// [Linux `setsockopt`]: https://man7.org/linux/man-pages/man2/setsockopt.2.html
+/// [Linux `tcp`]: https://man7.org/linux/man-pages/man7/tcp.7.html
+/// [Winsock2 `setsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-setsockopt
+/// [Winsock2 `IPPROTO_TCP` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/ipproto-tcp-socket-options
+#[inline]
+#[doc(alias = "TCP_NODELAY")]
+pub fn set_tcp_nodelay<Fd: AsFd>(fd: Fd, nodelay: bool) -> io::Result<()> {
+    imp::net::syscalls::sockopt::set_tcp_nodelay(fd.as_fd(), nodelay)
+}
+
+/// `getsockopt(fd, IPPROTO_TCP, TCP_NODELAY)`
+///
+/// # References
+///  - [POSIX `getsockopt`]
+///  - [POSIX `netinet/tcp.h`]
+///  - [Linux `getsockopt`]
+///  - [Linux `tcp`]
+///  - [Winsock2 `getsockopt`]
+///  - [Winsock2 `IPPROTO_TCP` options]
+///
+/// [POSIX `getsockopt`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/getsockopt.html
+/// [POSIX `netinet/tcp.h`]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/netinet_tcp.h.html
+/// [Linux `getsockopt`]: https://man7.org/linux/man-pages/man2/getsockopt.2.html
+/// [Linux `tcp`]: https://man7.org/linux/man-pages/man7/tcp.7.html
+/// [Winsock2 `setsockopt`]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-setsockopt
+/// [Winsock2 `IPPROTO_TCP` options]: https://docs.microsoft.com/en-us/windows/win32/winsock/ipproto-tcp-socket-options
+#[inline]
+#[doc(alias = "TCP_NODELAY")]
+pub fn get_tcp_nodelay<Fd: AsFd>(fd: Fd) -> io::Result<bool> {
+    imp::net::syscalls::sockopt::get_tcp_nodelay(fd.as_fd())
+}
diff --git a/vendor/rustix/src/net/wsa.rs b/vendor/rustix/src/net/wsa.rs
new file mode 100644
index 000000000..e2a70c97b
--- /dev/null
+++ b/vendor/rustix/src/net/wsa.rs
@@ -0,0 +1,49 @@
+use crate::io;
+use core::mem::MaybeUninit;
+use windows_sys::Win32::Networking::WinSock::{WSACleanup, WSAData, WSAGetLastError, WSAStartup};
+
+/// `WSAStartup()`—Initialize process-wide Windows support for sockets.
+///
+/// On Windows, it's necessary to initialize the sockets subsystem before
+/// using sockets APIs. The function performs the necessary initialization.
+///
+/// # References
+///  - [Winsock2]
+///
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-wsastartup
+pub fn wsa_startup() -> io::Result<WSAData> {
+    // Request version 2.2, which has been the latest version since far older
+    // versions of Windows than we support here. For more information about
+    // the version, see [here].
+    //
+    // [here]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-wsastartup#remarks
+    let version = 0x202;
+    let mut data = MaybeUninit::uninit();
+    unsafe {
+        let ret = WSAStartup(version, data.as_mut_ptr());
+        if ret == 0 {
+            Ok(data.assume_init())
+        } else {
+            Err(io::Errno::from_raw_os_error(WSAGetLastError()))
+        }
+    }
+}
+
+/// `WSACleanup()`—Clean up process-wide Windows support for sockets.
+///
+/// In a program where `init` is called, if sockets are no longer necessary,
+/// this function releases associated resources.
+///
+/// # References
+///  - [Winsock2]
+///
+/// [Winsock2]: https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-wsacleanup
+pub fn wsa_cleanup() -> io::Result<()> {
+    unsafe {
+        if WSACleanup() == 0 {
+            Ok(())
+        } else {
+            Err(io::Errno::from_raw_os_error(WSAGetLastError()))
+        }
+    }
+}