Deleted vendor folder

1 files changed, 0 insertions, 1065 deletions

diff --git a/vendor/rustix/src/backend/libc/net/sockopt.rs b/vendor/rustix/src/backend/libc/net/sockopt.rs
deleted file mode 100644
index cff2ca2..0000000
--- a/vendor/rustix/src/backend/libc/net/sockopt.rs
+++ /dev/null
@@ -1,1065 +0,0 @@
-//! libc syscalls supporting `rustix::net::sockopt`.
-
-use super::ext::{in6_addr_new, in_addr_new};
-use crate::backend::c;
-use crate::backend::conv::{borrowed_fd, ret};
-use crate::fd::BorrowedFd;
-#[cfg(feature = "alloc")]
-#[cfg(any(
-    linux_like,
-    target_os = "freebsd",
-    target_os = "fuchsia",
-    target_os = "illumos"
-))]
-use crate::ffi::CStr;
-use crate::io;
-use crate::net::sockopt::Timeout;
-#[cfg(not(any(
-    apple,
-    windows,
-    target_os = "aix",
-    target_os = "dragonfly",
-    target_os = "emscripten",
-    target_os = "espidf",
-    target_os = "haiku",
-    target_os = "netbsd",
-    target_os = "nto",
-    target_os = "vita",
-)))]
-use crate::net::AddressFamily;
-#[cfg(any(
-    linux_kernel,
-    target_os = "freebsd",
-    target_os = "fuchsia",
-    target_os = "openbsd",
-    target_os = "redox",
-    target_env = "newlib"
-))]
-use crate::net::Protocol;
-#[cfg(any(
-    linux_kernel,
-    target_os = "freebsd",
-    target_os = "fuchsia",
-    target_os = "openbsd",
-    target_os = "redox",
-    target_env = "newlib"
-))]
-use crate::net::RawProtocol;
-use crate::net::{Ipv4Addr, Ipv6Addr, SocketType};
-#[cfg(any(linux_kernel, target_os = "fuchsia"))]
-use crate::net::{SocketAddrAny, SocketAddrStorage, SocketAddrV4};
-#[cfg(linux_kernel)]
-use crate::net::{SocketAddrV6, UCred};
-use crate::utils::as_mut_ptr;
-#[cfg(feature = "alloc")]
-#[cfg(any(
-    linux_like,
-    target_os = "freebsd",
-    target_os = "fuchsia",
-    target_os = "illumos"
-))]
-use alloc::borrow::ToOwned;
-#[cfg(feature = "alloc")]
-#[cfg(any(
-    linux_like,
-    target_os = "freebsd",
-    target_os = "fuchsia",
-    target_os = "illumos"
-))]
-use alloc::string::String;
-#[cfg(apple)]
-use c::TCP_KEEPALIVE as TCP_KEEPIDLE;
-#[cfg(not(any(apple, target_os = "openbsd", target_os = "haiku", target_os = "nto")))]
-use c::TCP_KEEPIDLE;
-use core::mem::{size_of, MaybeUninit};
-use core::time::Duration;
-#[cfg(windows)]
-use windows_sys::Win32::Foundation::BOOL;
-
-#[inline]
-fn getsockopt<T: Copy>(fd: BorrowedFd<'_>, level: i32, optname: i32) -> io::Result<T> {
-    let mut optlen = core::mem::size_of::<T>().try_into().unwrap();
-    debug_assert!(
-        optlen as usize >= core::mem::size_of::<c::c_int>(),
-        "Socket APIs don't ever use `bool` directly"
-    );
-
-    let mut value = MaybeUninit::<T>::zeroed();
-    getsockopt_raw(fd, level, optname, &mut value, &mut optlen)?;
-
-    // On Windows at least, `getsockopt` has been observed writing 1
-    // byte on at least (`IPPROTO_TCP`, `TCP_NODELAY`), even though
-    // Windows' documentation says that should write a 4-byte `BOOL`.
-    // So, we initialize the memory to zeros above, and just assert
-    // that `getsockopt` doesn't write too many bytes here.
-    assert!(
-        optlen as usize <= size_of::<T>(),
-        "unexpected getsockopt size"
-    );
-
-    unsafe { Ok(value.assume_init()) }
-}
-
-#[inline]
-fn getsockopt_raw<T>(
-    fd: BorrowedFd<'_>,
-    level: i32,
-    optname: i32,
-    value: &mut MaybeUninit<T>,
-    optlen: &mut c::socklen_t,
-) -> io::Result<()> {
-    unsafe {
-        ret(c::getsockopt(
-            borrowed_fd(fd),
-            level,
-            optname,
-            as_mut_ptr(value).cast(),
-            optlen,
-        ))
-    }
-}
-
-#[inline]
-fn setsockopt<T: Copy>(fd: BorrowedFd<'_>, level: i32, optname: i32, value: T) -> io::Result<()> {
-    let optlen = core::mem::size_of::<T>().try_into().unwrap();
-    debug_assert!(
-        optlen as usize >= core::mem::size_of::<c::c_int>(),
-        "Socket APIs don't ever use `bool` directly"
-    );
-    setsockopt_raw(fd, level, optname, &value, optlen)
-}
-
-#[inline]
-fn setsockopt_raw<T>(
-    fd: BorrowedFd<'_>,
-    level: i32,
-    optname: i32,
-    ptr: *const T,
-    optlen: c::socklen_t,
-) -> io::Result<()> {
-    unsafe {
-        ret(c::setsockopt(
-            borrowed_fd(fd),
-            level,
-            optname,
-            ptr.cast(),
-            optlen,
-        ))
-    }
-}
-
-#[inline]
-pub(crate) fn get_socket_type(fd: BorrowedFd<'_>) -> io::Result<SocketType> {
-    getsockopt(fd, c::SOL_SOCKET, c::SO_TYPE)
-}
-
-#[inline]
-pub(crate) fn set_socket_reuseaddr(fd: BorrowedFd<'_>, reuseaddr: bool) -> io::Result<()> {
-    setsockopt(fd, c::SOL_SOCKET, c::SO_REUSEADDR, from_bool(reuseaddr))
-}
-
-#[inline]
-pub(crate) fn get_socket_reuseaddr(fd: BorrowedFd<'_>) -> io::Result<bool> {
-    getsockopt(fd, c::SOL_SOCKET, c::SO_REUSEADDR).map(to_bool)
-}
-
-#[inline]
-pub(crate) fn set_socket_broadcast(fd: BorrowedFd<'_>, broadcast: bool) -> io::Result<()> {
-    setsockopt(fd, c::SOL_SOCKET, c::SO_BROADCAST, from_bool(broadcast))
-}
-
-#[inline]
-pub(crate) fn get_socket_broadcast(fd: BorrowedFd<'_>) -> io::Result<bool> {
-    getsockopt(fd, c::SOL_SOCKET, c::SO_BROADCAST).map(to_bool)
-}
-
-#[inline]
-pub(crate) fn set_socket_linger(fd: BorrowedFd<'_>, linger: Option<Duration>) -> io::Result<()> {
-    // Convert `linger` to seconds, rounding up.
-    let l_linger = if let Some(linger) = linger {
-        duration_to_secs(linger)?
-    } else {
-        0
-    };
-    let linger = c::linger {
-        l_onoff: linger.is_some().into(),
-        l_linger,
-    };
-    setsockopt(fd, c::SOL_SOCKET, c::SO_LINGER, linger)
-}
-
-#[inline]
-pub(crate) fn get_socket_linger(fd: BorrowedFd<'_>) -> io::Result<Option<Duration>> {
-    let linger: c::linger = getsockopt(fd, c::SOL_SOCKET, c::SO_LINGER)?;
-    Ok((linger.l_onoff != 0).then(|| Duration::from_secs(linger.l_linger as u64)))
-}
-
-#[cfg(linux_kernel)]
-#[inline]
-pub(crate) fn set_socket_passcred(fd: BorrowedFd<'_>, passcred: bool) -> io::Result<()> {
-    setsockopt(fd, c::SOL_SOCKET, c::SO_PASSCRED, from_bool(passcred))
-}
-
-#[cfg(linux_kernel)]
-#[inline]
-pub(crate) fn get_socket_passcred(fd: BorrowedFd<'_>) -> io::Result<bool> {
-    getsockopt(fd, c::SOL_SOCKET, c::SO_PASSCRED).map(to_bool)
-}
-
-#[inline]
-pub(crate) fn set_socket_timeout(
-    fd: BorrowedFd<'_>,
-    id: Timeout,
-    timeout: Option<Duration>,
-) -> io::Result<()> {
-    let optname = match id {
-        Timeout::Recv => c::SO_RCVTIMEO,
-        Timeout::Send => c::SO_SNDTIMEO,
-    };
-
-    #[cfg(not(windows))]
-    let timeout = match timeout {
-        Some(timeout) => {
-            if timeout == Duration::ZERO {
-                return Err(io::Errno::INVAL);
-            }
-
-            // Rust's musl libc bindings deprecated `time_t` while they
-            // transition to 64-bit `time_t`. What we want here is just
-            // “whatever type `timeval`'s `tv_sec` is”, so we're ok using
-            // the deprecated type.
-            #[allow(deprecated)]
-            let tv_sec = timeout.as_secs().try_into().unwrap_or(c::time_t::MAX);
-
-            // `subsec_micros` rounds down, so we use `subsec_nanos` and
-            // manually round up.
-            let mut timeout = c::timeval {
-                tv_sec,
-                tv_usec: ((timeout.subsec_nanos() + 999) / 1000) as _,
-            };
-            if timeout.tv_sec == 0 && timeout.tv_usec == 0 {
-                timeout.tv_usec = 1;
-            }
-            timeout
-        }
-        None => c::timeval {
-            tv_sec: 0,
-            tv_usec: 0,
-        },
-    };
-
-    #[cfg(windows)]
-    let timeout: u32 = match timeout {
-        Some(timeout) => {
-            if timeout == Duration::ZERO {
-                return Err(io::Errno::INVAL);
-            }
-
-            // `as_millis` rounds down, so we use `as_nanos` and
-            // manually round up.
-            let mut timeout: u32 = ((timeout.as_nanos() + 999_999) / 1_000_000)
-                .try_into()
-                .map_err(|_convert_err| io::Errno::INVAL)?;
-            if timeout == 0 {
-                timeout = 1;
-            }
-            timeout
-        }
-        None => 0,
-    };
-
-    setsockopt(fd, c::SOL_SOCKET, optname, timeout)
-}
-
-#[inline]
-pub(crate) fn get_socket_timeout(fd: BorrowedFd<'_>, id: Timeout) -> io::Result<Option<Duration>> {
-    let optname = match id {
-        Timeout::Recv => c::SO_RCVTIMEO,
-        Timeout::Send => c::SO_SNDTIMEO,
-    };
-
-    #[cfg(not(windows))]
-    {
-        let timeout: c::timeval = getsockopt(fd, c::SOL_SOCKET, optname)?;
-        if timeout.tv_sec == 0 && timeout.tv_usec == 0 {
-            Ok(None)
-        } else {
-            Ok(Some(
-                Duration::from_secs(timeout.tv_sec as u64)
-                    + Duration::from_micros(timeout.tv_usec as u64),
-            ))
-        }
-    }
-
-    #[cfg(windows)]
-    {
-        let timeout: u32 = getsockopt(fd, c::SOL_SOCKET, optname)?;
-        if timeout == 0 {
-            Ok(None)
-        } else {
-            Ok(Some(Duration::from_millis(timeout as u64)))
-        }
-    }
-}
-
-#[cfg(any(apple, freebsdlike, target_os = "netbsd"))]
-#[inline]
-pub(crate) fn get_socket_nosigpipe(fd: BorrowedFd<'_>) -> io::Result<bool> {
-    getsockopt(fd, c::SOL_SOCKET, c::SO_NOSIGPIPE).map(to_bool)
-}
-
-#[cfg(any(apple, freebsdlike, target_os = "netbsd"))]
-#[inline]
-pub(crate) fn set_socket_nosigpipe(fd: BorrowedFd<'_>, val: bool) -> io::Result<()> {
-    setsockopt(fd, c::SOL_SOCKET, c::SO_NOSIGPIPE, from_bool(val))
-}
-
-#[inline]
-pub(crate) fn get_socket_error(fd: BorrowedFd<'_>) -> io::Result<Result<(), io::Errno>> {
-    let err: c::c_int = getsockopt(fd, c::SOL_SOCKET, c::SO_ERROR)?;
-    Ok(if err == 0 {
-        Ok(())
-    } else {
-        Err(io::Errno::from_raw_os_error(err))
-    })
-}
-
-#[inline]
-pub(crate) fn set_socket_keepalive(fd: BorrowedFd<'_>, keepalive: bool) -> io::Result<()> {
-    setsockopt(fd, c::SOL_SOCKET, c::SO_KEEPALIVE, from_bool(keepalive))
-}
-
-#[inline]
-pub(crate) fn get_socket_keepalive(fd: BorrowedFd<'_>) -> io::Result<bool> {
-    getsockopt(fd, c::SOL_SOCKET, c::SO_KEEPALIVE).map(to_bool)
-}
-
-#[inline]
-pub(crate) fn set_socket_recv_buffer_size(fd: BorrowedFd<'_>, size: usize) -> io::Result<()> {
-    let size: c::c_int = size.try_into().map_err(|_| io::Errno::INVAL)?;
-    setsockopt(fd, c::SOL_SOCKET, c::SO_RCVBUF, size)
-}
-
-#[inline]
-pub(crate) fn get_socket_recv_buffer_size(fd: BorrowedFd<'_>) -> io::Result<usize> {
-    getsockopt(fd, c::SOL_SOCKET, c::SO_RCVBUF).map(|size: u32| size as usize)
-}
-
-#[inline]
-pub(crate) fn set_socket_send_buffer_size(fd: BorrowedFd<'_>, size: usize) -> io::Result<()> {
-    let size: c::c_int = size.try_into().map_err(|_| io::Errno::INVAL)?;
-    setsockopt(fd, c::SOL_SOCKET, c::SO_SNDBUF, size)
-}
-
-#[inline]
-pub(crate) fn get_socket_send_buffer_size(fd: BorrowedFd<'_>) -> io::Result<usize> {
-    getsockopt(fd, c::SOL_SOCKET, c::SO_SNDBUF).map(|size: u32| size as usize)
-}
-
-#[inline]
-#[cfg(not(any(
-    apple,
-    windows,
-    target_os = "aix",
-    target_os = "dragonfly",
-    target_os = "emscripten",
-    target_os = "espidf",
-    target_os = "haiku",
-    target_os = "netbsd",
-    target_os = "nto",
-    target_os = "vita",
-)))]
-pub(crate) fn get_socket_domain(fd: BorrowedFd<'_>) -> io::Result<AddressFamily> {
-    let domain: c::c_int = getsockopt(fd, c::SOL_SOCKET, c::SO_DOMAIN)?;
-    Ok(AddressFamily(
-        domain.try_into().map_err(|_| io::Errno::OPNOTSUPP)?,
-    ))
-}
-
-#[inline]
-#[cfg(not(apple))] // Apple platforms declare the constant, but do not actually implement it.
-pub(crate) fn get_socket_acceptconn(fd: BorrowedFd<'_>) -> io::Result<bool> {
-    getsockopt(fd, c::SOL_SOCKET, c::SO_ACCEPTCONN).map(to_bool)
-}
-
-#[inline]
-pub(crate) fn set_socket_oobinline(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
-    setsockopt(fd, c::SOL_SOCKET, c::SO_OOBINLINE, from_bool(value))
-}
-
-#[inline]
-pub(crate) fn get_socket_oobinline(fd: BorrowedFd<'_>) -> io::Result<bool> {
-    getsockopt(fd, c::SOL_SOCKET, c::SO_OOBINLINE).map(to_bool)
-}
-
-#[cfg(not(any(solarish, windows)))]
-#[inline]
-pub(crate) fn set_socket_reuseport(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
-    setsockopt(fd, c::SOL_SOCKET, c::SO_REUSEPORT, from_bool(value))
-}
-
-#[cfg(not(any(solarish, windows)))]
-#[inline]
-pub(crate) fn get_socket_reuseport(fd: BorrowedFd<'_>) -> io::Result<bool> {
-    getsockopt(fd, c::SOL_SOCKET, c::SO_REUSEPORT).map(to_bool)
-}
-
-#[cfg(target_os = "freebsd")]
-#[inline]
-pub(crate) fn set_socket_reuseport_lb(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
-    setsockopt(fd, c::SOL_SOCKET, c::SO_REUSEPORT_LB, from_bool(value))
-}
-
-#[cfg(target_os = "freebsd")]
-#[inline]
-pub(crate) fn get_socket_reuseport_lb(fd: BorrowedFd<'_>) -> io::Result<bool> {
-    getsockopt(fd, c::SOL_SOCKET, c::SO_REUSEPORT_LB).map(to_bool)
-}
-
-#[cfg(any(
-    linux_kernel,
-    target_os = "freebsd",
-    target_os = "fuchsia",
-    target_os = "openbsd",
-    target_os = "redox",
-    target_env = "newlib"
-))]
-#[inline]
-pub(crate) fn get_socket_protocol(fd: BorrowedFd<'_>) -> io::Result<Option<Protocol>> {
-    getsockopt(fd, c::SOL_SOCKET, c::SO_PROTOCOL)
-        .map(|raw| RawProtocol::new(raw).map(Protocol::from_raw))
-}
-
-#[cfg(target_os = "linux")]
-#[inline]
-pub(crate) fn get_socket_cookie(fd: BorrowedFd<'_>) -> io::Result<u64> {
-    getsockopt(fd, c::SOL_SOCKET, c::SO_COOKIE)
-}
-
-#[cfg(target_os = "linux")]
-#[inline]
-pub(crate) fn get_socket_incoming_cpu(fd: BorrowedFd<'_>) -> io::Result<u32> {
-    getsockopt(fd, c::SOL_SOCKET, c::SO_INCOMING_CPU)
-}
-
-#[cfg(target_os = "linux")]
-#[inline]
-pub(crate) fn set_socket_incoming_cpu(fd: BorrowedFd<'_>, value: u32) -> io::Result<()> {
-    setsockopt(fd, c::SOL_SOCKET, c::SO_INCOMING_CPU, value)
-}
-
-#[inline]
-pub(crate) fn set_ip_ttl(fd: BorrowedFd<'_>, ttl: u32) -> io::Result<()> {
-    setsockopt(fd, c::IPPROTO_IP, c::IP_TTL, ttl)
-}
-
-#[inline]
-pub(crate) fn get_ip_ttl(fd: BorrowedFd<'_>) -> io::Result<u32> {
-    getsockopt(fd, c::IPPROTO_IP, c::IP_TTL)
-}
-
-#[inline]
-pub(crate) fn set_ipv6_v6only(fd: BorrowedFd<'_>, only_v6: bool) -> io::Result<()> {
-    setsockopt(fd, c::IPPROTO_IPV6, c::IPV6_V6ONLY, from_bool(only_v6))
-}
-
-#[inline]
-pub(crate) fn get_ipv6_v6only(fd: BorrowedFd<'_>) -> io::Result<bool> {
-    getsockopt(fd, c::IPPROTO_IPV6, c::IPV6_V6ONLY).map(to_bool)
-}
-
-#[inline]
-pub(crate) fn set_ip_multicast_loop(fd: BorrowedFd<'_>, multicast_loop: bool) -> io::Result<()> {
-    setsockopt(
-        fd,
-        c::IPPROTO_IP,
-        c::IP_MULTICAST_LOOP,
-        from_bool(multicast_loop),
-    )
-}
-
-#[inline]
-pub(crate) fn get_ip_multicast_loop(fd: BorrowedFd<'_>) -> io::Result<bool> {
-    getsockopt(fd, c::IPPROTO_IP, c::IP_MULTICAST_LOOP).map(to_bool)
-}
-
-#[inline]
-pub(crate) fn set_ip_multicast_ttl(fd: BorrowedFd<'_>, multicast_ttl: u32) -> io::Result<()> {
-    setsockopt(fd, c::IPPROTO_IP, c::IP_MULTICAST_TTL, multicast_ttl)
-}
-
-#[inline]
-pub(crate) fn get_ip_multicast_ttl(fd: BorrowedFd<'_>) -> io::Result<u32> {
-    getsockopt(fd, c::IPPROTO_IP, c::IP_MULTICAST_TTL)
-}
-
-#[inline]
-pub(crate) fn set_ipv6_multicast_loop(fd: BorrowedFd<'_>, multicast_loop: bool) -> io::Result<()> {
-    setsockopt(
-        fd,
-        c::IPPROTO_IPV6,
-        c::IPV6_MULTICAST_LOOP,
-        from_bool(multicast_loop),
-    )
-}
-
-#[inline]
-pub(crate) fn get_ipv6_multicast_loop(fd: BorrowedFd<'_>) -> io::Result<bool> {
-    getsockopt(fd, c::IPPROTO_IPV6, c::IPV6_MULTICAST_LOOP).map(to_bool)
-}
-
-#[inline]
-pub(crate) fn set_ipv6_multicast_hops(fd: BorrowedFd<'_>, multicast_hops: u32) -> io::Result<()> {
-    setsockopt(fd, c::IPPROTO_IP, c::IPV6_MULTICAST_HOPS, multicast_hops)
-}
-
-#[inline]
-pub(crate) fn get_ipv6_multicast_hops(fd: BorrowedFd<'_>) -> io::Result<u32> {
-    getsockopt(fd, c::IPPROTO_IP, c::IPV6_MULTICAST_HOPS)
-}
-
-#[inline]
-pub(crate) fn set_ip_add_membership(
-    fd: BorrowedFd<'_>,
-    multiaddr: &Ipv4Addr,
-    interface: &Ipv4Addr,
-) -> io::Result<()> {
-    let mreq = to_ip_mreq(multiaddr, interface);
-    setsockopt(fd, c::IPPROTO_IP, c::IP_ADD_MEMBERSHIP, mreq)
-}
-
-#[cfg(any(
-    apple,
-    freebsdlike,
-    linux_like,
-    target_os = "fuchsia",
-    target_os = "openbsd"
-))]
-#[inline]
-pub(crate) fn set_ip_add_membership_with_ifindex(
-    fd: BorrowedFd<'_>,
-    multiaddr: &Ipv4Addr,
-    address: &Ipv4Addr,
-    ifindex: i32,
-) -> io::Result<()> {
-    let mreqn = to_ip_mreqn(multiaddr, address, ifindex);
-    setsockopt(fd, c::IPPROTO_IP, c::IP_ADD_MEMBERSHIP, mreqn)
-}
-
-#[cfg(any(apple, freebsdlike, linux_like, solarish, target_os = "aix"))]
-#[inline]
-pub(crate) fn set_ip_add_source_membership(
-    fd: BorrowedFd<'_>,
-    multiaddr: &Ipv4Addr,
-    interface: &Ipv4Addr,
-    sourceaddr: &Ipv4Addr,
-) -> io::Result<()> {
-    let mreq_source = to_imr_source(multiaddr, interface, sourceaddr);
-    setsockopt(fd, c::IPPROTO_IP, c::IP_ADD_SOURCE_MEMBERSHIP, mreq_source)
-}
-
-#[cfg(any(apple, freebsdlike, linux_like, solarish, target_os = "aix"))]
-#[inline]
-pub(crate) fn set_ip_drop_source_membership(
-    fd: BorrowedFd<'_>,
-    multiaddr: &Ipv4Addr,
-    interface: &Ipv4Addr,
-    sourceaddr: &Ipv4Addr,
-) -> io::Result<()> {
-    let mreq_source = to_imr_source(multiaddr, interface, sourceaddr);
-    setsockopt(fd, c::IPPROTO_IP, c::IP_DROP_SOURCE_MEMBERSHIP, mreq_source)
-}
-
-#[inline]
-pub(crate) fn set_ipv6_add_membership(
-    fd: BorrowedFd<'_>,
-    multiaddr: &Ipv6Addr,
-    interface: u32,
-) -> io::Result<()> {
-    #[cfg(not(any(
-        bsd,
-        solarish,
-        target_os = "haiku",
-        target_os = "l4re",
-        target_os = "nto"
-    )))]
-    use c::IPV6_ADD_MEMBERSHIP;
-    #[cfg(any(
-        bsd,
-        solarish,
-        target_os = "haiku",
-        target_os = "l4re",
-        target_os = "nto"
-    ))]
-    use c::IPV6_JOIN_GROUP as IPV6_ADD_MEMBERSHIP;
-
-    let mreq = to_ipv6mr(multiaddr, interface);
-    setsockopt(fd, c::IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, mreq)
-}
-
-#[inline]
-pub(crate) fn set_ip_drop_membership(
-    fd: BorrowedFd<'_>,
-    multiaddr: &Ipv4Addr,
-    interface: &Ipv4Addr,
-) -> io::Result<()> {
-    let mreq = to_ip_mreq(multiaddr, interface);
-    setsockopt(fd, c::IPPROTO_IP, c::IP_DROP_MEMBERSHIP, mreq)
-}
-
-#[cfg(any(
-    apple,
-    freebsdlike,
-    linux_like,
-    target_os = "fuchsia",
-    target_os = "openbsd"
-))]
-#[inline]
-pub(crate) fn set_ip_drop_membership_with_ifindex(
-    fd: BorrowedFd<'_>,
-    multiaddr: &Ipv4Addr,
-    address: &Ipv4Addr,
-    ifindex: i32,
-) -> io::Result<()> {
-    let mreqn = to_ip_mreqn(multiaddr, address, ifindex);
-    setsockopt(fd, c::IPPROTO_IP, c::IP_DROP_MEMBERSHIP, mreqn)
-}
-
-#[inline]
-pub(crate) fn set_ipv6_drop_membership(
-    fd: BorrowedFd<'_>,
-    multiaddr: &Ipv6Addr,
-    interface: u32,
-) -> io::Result<()> {
-    #[cfg(not(any(
-        bsd,
-        solarish,
-        target_os = "haiku",
-        target_os = "l4re",
-        target_os = "nto"
-    )))]
-    use c::IPV6_DROP_MEMBERSHIP;
-    #[cfg(any(
-        bsd,
-        solarish,
-        target_os = "haiku",
-        target_os = "l4re",
-        target_os = "nto"
-    ))]
-    use c::IPV6_LEAVE_GROUP as IPV6_DROP_MEMBERSHIP;
-
-    let mreq = to_ipv6mr(multiaddr, interface);
-    setsockopt(fd, c::IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, mreq)
-}
-
-#[inline]
-pub(crate) fn get_ipv6_unicast_hops(fd: BorrowedFd<'_>) -> io::Result<u8> {
-    getsockopt(fd, c::IPPROTO_IPV6, c::IPV6_UNICAST_HOPS).map(|hops: c::c_int| hops as u8)
-}
-
-#[inline]
-pub(crate) fn set_ipv6_unicast_hops(fd: BorrowedFd<'_>, hops: Option<u8>) -> io::Result<()> {
-    let hops = match hops {
-        Some(hops) => hops as c::c_int,
-        None => -1,
-    };
-    setsockopt(fd, c::IPPROTO_IPV6, c::IPV6_UNICAST_HOPS, hops)
-}
-
-#[cfg(any(
-    bsd,
-    linux_like,
-    target_os = "aix",
-    target_os = "fuchsia",
-    target_os = "haiku",
-    target_os = "nto",
-    target_env = "newlib"
-))]
-#[inline]
-pub(crate) fn set_ip_tos(fd: BorrowedFd<'_>, value: u8) -> io::Result<()> {
-    setsockopt(fd, c::IPPROTO_IP, c::IP_TOS, i32::from(value))
-}
-
-#[cfg(any(
-    bsd,
-    linux_like,
-    target_os = "aix",
-    target_os = "fuchsia",
-    target_os = "haiku",
-    target_os = "nto",
-    target_env = "newlib"
-))]
-#[inline]
-pub(crate) fn get_ip_tos(fd: BorrowedFd<'_>) -> io::Result<u8> {
-    let value: i32 = getsockopt(fd, c::IPPROTO_IP, c::IP_TOS)?;
-    Ok(value as u8)
-}
-
-#[cfg(any(apple, linux_like, target_os = "freebsd", target_os = "fuchsia"))]
-#[inline]
-pub(crate) fn set_ip_recvtos(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
-    setsockopt(fd, c::IPPROTO_IP, c::IP_RECVTOS, from_bool(value))
-}
-
-#[cfg(any(apple, linux_like, target_os = "freebsd", target_os = "fuchsia"))]
-#[inline]
-pub(crate) fn get_ip_recvtos(fd: BorrowedFd<'_>) -> io::Result<bool> {
-    getsockopt(fd, c::IPPROTO_IP, c::IP_RECVTOS).map(to_bool)
-}
-
-#[cfg(any(
-    bsd,
-    linux_like,
-    target_os = "aix",
-    target_os = "fuchsia",
-    target_os = "nto"
-))]
-#[inline]
-pub(crate) fn set_ipv6_recvtclass(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
-    setsockopt(fd, c::IPPROTO_IPV6, c::IPV6_RECVTCLASS, from_bool(value))
-}
-
-#[cfg(any(
-    bsd,
-    linux_like,
-    target_os = "aix",
-    target_os = "fuchsia",
-    target_os = "nto"
-))]
-#[inline]
-pub(crate) fn get_ipv6_recvtclass(fd: BorrowedFd<'_>) -> io::Result<bool> {
-    getsockopt(fd, c::IPPROTO_IPV6, c::IPV6_RECVTCLASS).map(to_bool)
-}
-
-#[cfg(any(linux_kernel, target_os = "fuchsia"))]
-#[inline]
-pub(crate) fn set_ip_freebind(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
-    setsockopt(fd, c::IPPROTO_IP, c::IP_FREEBIND, from_bool(value))
-}
-
-#[cfg(any(linux_kernel, target_os = "fuchsia"))]
-#[inline]
-pub(crate) fn get_ip_freebind(fd: BorrowedFd<'_>) -> io::Result<bool> {
-    getsockopt(fd, c::IPPROTO_IP, c::IP_FREEBIND).map(to_bool)
-}
-
-#[cfg(linux_kernel)]
-#[inline]
-pub(crate) fn set_ipv6_freebind(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
-    setsockopt(fd, c::IPPROTO_IPV6, c::IPV6_FREEBIND, from_bool(value))
-}
-
-#[cfg(linux_kernel)]
-#[inline]
-pub(crate) fn get_ipv6_freebind(fd: BorrowedFd<'_>) -> io::Result<bool> {
-    getsockopt(fd, c::IPPROTO_IPV6, c::IPV6_FREEBIND).map(to_bool)
-}
-
-#[cfg(any(linux_kernel, target_os = "fuchsia"))]
-#[inline]
-pub(crate) fn get_ip_original_dst(fd: BorrowedFd<'_>) -> io::Result<SocketAddrV4> {
-    let level = c::IPPROTO_IP;
-    let optname = c::SO_ORIGINAL_DST;
-    let mut value = MaybeUninit::<SocketAddrStorage>::uninit();
-    let mut optlen = core::mem::size_of_val(&value).try_into().unwrap();
-
-    getsockopt_raw(fd, level, optname, &mut value, &mut optlen)?;
-
-    let any = unsafe { SocketAddrAny::read(value.as_ptr(), optlen as usize)? };
-    match any {
-        SocketAddrAny::V4(v4) => Ok(v4),
-        _ => unreachable!(),
-    }
-}
-
-#[cfg(linux_kernel)]
-#[inline]
-pub(crate) fn get_ipv6_original_dst(fd: BorrowedFd<'_>) -> io::Result<SocketAddrV6> {
-    let level = c::IPPROTO_IPV6;
-    let optname = c::IP6T_SO_ORIGINAL_DST;
-    let mut value = MaybeUninit::<SocketAddrStorage>::uninit();
-    let mut optlen = core::mem::size_of_val(&value).try_into().unwrap();
-
-    getsockopt_raw(fd, level, optname, &mut value, &mut optlen)?;
-
-    let any = unsafe { SocketAddrAny::read(value.as_ptr(), optlen as usize)? };
-    match any {
-        SocketAddrAny::V6(v6) => Ok(v6),
-        _ => unreachable!(),
-    }
-}
-
-#[cfg(not(any(
-    solarish,
-    windows,
-    target_os = "espidf",
-    target_os = "haiku",
-    target_os = "vita"
-)))]
-#[inline]
-pub(crate) fn set_ipv6_tclass(fd: BorrowedFd<'_>, value: u32) -> io::Result<()> {
-    setsockopt(fd, c::IPPROTO_IPV6, c::IPV6_TCLASS, value)
-}
-
-#[cfg(not(any(
-    solarish,
-    windows,
-    target_os = "espidf",
-    target_os = "haiku",
-    target_os = "vita"
-)))]
-#[inline]
-pub(crate) fn get_ipv6_tclass(fd: BorrowedFd<'_>) -> io::Result<u32> {
-    getsockopt(fd, c::IPPROTO_IPV6, c::IPV6_TCLASS)
-}
-
-#[inline]
-pub(crate) fn set_tcp_nodelay(fd: BorrowedFd<'_>, nodelay: bool) -> io::Result<()> {
-    setsockopt(fd, c::IPPROTO_TCP, c::TCP_NODELAY, from_bool(nodelay))
-}
-
-#[inline]
-pub(crate) fn get_tcp_nodelay(fd: BorrowedFd<'_>) -> io::Result<bool> {
-    getsockopt(fd, c::IPPROTO_TCP, c::TCP_NODELAY).map(to_bool)
-}
-
-#[inline]
-#[cfg(not(any(target_os = "openbsd", target_os = "haiku", target_os = "nto")))]
-pub(crate) fn set_tcp_keepcnt(fd: BorrowedFd<'_>, count: u32) -> io::Result<()> {
-    setsockopt(fd, c::IPPROTO_TCP, c::TCP_KEEPCNT, count)
-}
-
-#[inline]
-#[cfg(not(any(target_os = "openbsd", target_os = "haiku", target_os = "nto")))]
-pub(crate) fn get_tcp_keepcnt(fd: BorrowedFd<'_>) -> io::Result<u32> {
-    getsockopt(fd, c::IPPROTO_TCP, c::TCP_KEEPCNT)
-}
-
-#[inline]
-#[cfg(not(any(target_os = "openbsd", target_os = "haiku", target_os = "nto")))]
-pub(crate) fn set_tcp_keepidle(fd: BorrowedFd<'_>, duration: Duration) -> io::Result<()> {
-    let secs: c::c_uint = duration_to_secs(duration)?;
-    setsockopt(fd, c::IPPROTO_TCP, TCP_KEEPIDLE, secs)
-}
-
-#[inline]
-#[cfg(not(any(target_os = "openbsd", target_os = "haiku", target_os = "nto")))]
-pub(crate) fn get_tcp_keepidle(fd: BorrowedFd<'_>) -> io::Result<Duration> {
-    let secs: c::c_uint = getsockopt(fd, c::IPPROTO_TCP, TCP_KEEPIDLE)?;
-    Ok(Duration::from_secs(secs as u64))
-}
-
-#[inline]
-#[cfg(not(any(target_os = "openbsd", target_os = "haiku", target_os = "nto")))]
-pub(crate) fn set_tcp_keepintvl(fd: BorrowedFd<'_>, duration: Duration) -> io::Result<()> {
-    let secs: c::c_uint = duration_to_secs(duration)?;
-    setsockopt(fd, c::IPPROTO_TCP, c::TCP_KEEPINTVL, secs)
-}
-
-#[inline]
-#[cfg(not(any(target_os = "openbsd", target_os = "haiku", target_os = "nto")))]
-pub(crate) fn get_tcp_keepintvl(fd: BorrowedFd<'_>) -> io::Result<Duration> {
-    let secs: c::c_uint = getsockopt(fd, c::IPPROTO_TCP, c::TCP_KEEPINTVL)?;
-    Ok(Duration::from_secs(secs as u64))
-}
-
-#[inline]
-#[cfg(any(linux_like, target_os = "fuchsia"))]
-pub(crate) fn set_tcp_user_timeout(fd: BorrowedFd<'_>, value: u32) -> io::Result<()> {
-    setsockopt(fd, c::IPPROTO_TCP, c::TCP_USER_TIMEOUT, value)
-}
-
-#[inline]
-#[cfg(any(linux_like, target_os = "fuchsia"))]
-pub(crate) fn get_tcp_user_timeout(fd: BorrowedFd<'_>) -> io::Result<u32> {
-    getsockopt(fd, c::IPPROTO_TCP, c::TCP_USER_TIMEOUT)
-}
-
-#[cfg(any(linux_like, target_os = "fuchsia"))]
-#[inline]
-pub(crate) fn set_tcp_quickack(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
-    setsockopt(fd, c::IPPROTO_TCP, c::TCP_QUICKACK, from_bool(value))
-}
-
-#[cfg(any(linux_like, target_os = "fuchsia"))]
-#[inline]
-pub(crate) fn get_tcp_quickack(fd: BorrowedFd<'_>) -> io::Result<bool> {
-    getsockopt(fd, c::IPPROTO_TCP, c::TCP_QUICKACK).map(to_bool)
-}
-
-#[cfg(any(
-    linux_like,
-    target_os = "freebsd",
-    target_os = "fuchsia",
-    target_os = "illumos"
-))]
-#[inline]
-pub(crate) fn set_tcp_congestion(fd: BorrowedFd<'_>, value: &str) -> io::Result<()> {
-    let level = c::IPPROTO_TCP;
-    let optname = c::TCP_CONGESTION;
-    let optlen = value.len().try_into().unwrap();
-    setsockopt_raw(fd, level, optname, value.as_ptr(), optlen)
-}
-
-#[cfg(feature = "alloc")]
-#[cfg(any(
-    linux_like,
-    target_os = "freebsd",
-    target_os = "fuchsia",
-    target_os = "illumos"
-))]
-#[inline]
-pub(crate) fn get_tcp_congestion(fd: BorrowedFd<'_>) -> io::Result<String> {
-    let level = c::IPPROTO_TCP;
-    let optname = c::TCP_CONGESTION;
-    const OPTLEN: c::socklen_t = 16;
-    let mut value = MaybeUninit::<[MaybeUninit<u8>; OPTLEN as usize]>::uninit();
-    let mut optlen = OPTLEN;
-    getsockopt_raw(fd, level, optname, &mut value, &mut optlen)?;
-    unsafe {
-        let value = value.assume_init();
-        let slice: &[u8] = core::mem::transmute(&value[..optlen as usize]);
-        assert!(slice.iter().any(|b| *b == b'\0'));
-        Ok(
-            core::str::from_utf8(CStr::from_ptr(slice.as_ptr().cast()).to_bytes())
-                .unwrap()
-                .to_owned(),
-        )
-    }
-}
-
-#[cfg(any(linux_like, target_os = "fuchsia"))]
-#[inline]
-pub(crate) fn set_tcp_thin_linear_timeouts(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
-    setsockopt(
-        fd,
-        c::IPPROTO_TCP,
-        c::TCP_THIN_LINEAR_TIMEOUTS,
-        from_bool(value),
-    )
-}
-
-#[cfg(any(linux_like, target_os = "fuchsia"))]
-#[inline]
-pub(crate) fn get_tcp_thin_linear_timeouts(fd: BorrowedFd<'_>) -> io::Result<bool> {
-    getsockopt(fd, c::IPPROTO_TCP, c::TCP_THIN_LINEAR_TIMEOUTS).map(to_bool)
-}
-
-#[cfg(any(linux_like, solarish, target_os = "fuchsia"))]
-#[inline]
-pub(crate) fn set_tcp_cork(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
-    setsockopt(fd, c::IPPROTO_TCP, c::TCP_CORK, from_bool(value))
-}
-
-#[cfg(any(linux_like, solarish, target_os = "fuchsia"))]
-#[inline]
-pub(crate) fn get_tcp_cork(fd: BorrowedFd<'_>) -> io::Result<bool> {
-    getsockopt(fd, c::IPPROTO_TCP, c::TCP_CORK).map(to_bool)
-}
-
-#[cfg(linux_kernel)]
-#[inline]
-pub(crate) fn get_socket_peercred(fd: BorrowedFd<'_>) -> io::Result<UCred> {
-    getsockopt(fd, c::SOL_SOCKET, c::SO_PEERCRED)
-}
-
-#[inline]
-fn to_ip_mreq(multiaddr: &Ipv4Addr, interface: &Ipv4Addr) -> c::ip_mreq {
-    c::ip_mreq {
-        imr_multiaddr: to_imr_addr(multiaddr),
-        imr_interface: to_imr_addr(interface),
-    }
-}
-
-#[cfg(any(
-    apple,
-    freebsdlike,
-    linux_like,
-    target_os = "fuchsia",
-    target_os = "openbsd"
-))]
-#[inline]
-fn to_ip_mreqn(multiaddr: &Ipv4Addr, address: &Ipv4Addr, ifindex: i32) -> c::ip_mreqn {
-    c::ip_mreqn {
-        imr_multiaddr: to_imr_addr(multiaddr),
-        imr_address: to_imr_addr(address),
-        imr_ifindex: ifindex,
-    }
-}
-
-#[cfg(any(apple, freebsdlike, linux_like, solarish, target_os = "aix"))]
-#[inline]
-fn to_imr_source(
-    multiaddr: &Ipv4Addr,
-    interface: &Ipv4Addr,
-    sourceaddr: &Ipv4Addr,
-) -> c::ip_mreq_source {
-    c::ip_mreq_source {
-        imr_multiaddr: to_imr_addr(multiaddr),
-        imr_interface: to_imr_addr(interface),
-        imr_sourceaddr: to_imr_addr(sourceaddr),
-    }
-}
-
-#[inline]
-fn to_imr_addr(addr: &Ipv4Addr) -> c::in_addr {
-    in_addr_new(u32::from_ne_bytes(addr.octets()))
-}
-
-#[inline]
-fn to_ipv6mr(multiaddr: &Ipv6Addr, interface: u32) -> c::ipv6_mreq {
-    c::ipv6_mreq {
-        ipv6mr_multiaddr: to_ipv6mr_multiaddr(multiaddr),
-        ipv6mr_interface: to_ipv6mr_interface(interface),
-    }
-}
-
-#[inline]
-fn to_ipv6mr_multiaddr(multiaddr: &Ipv6Addr) -> c::in6_addr {
-    in6_addr_new(multiaddr.octets())
-}
-
-#[cfg(target_os = "android")]
-#[inline]
-fn to_ipv6mr_interface(interface: u32) -> c::c_int {
-    interface as c::c_int
-}
-
-#[cfg(not(target_os = "android"))]
-#[inline]
-fn to_ipv6mr_interface(interface: u32) -> c::c_uint {
-    interface as c::c_uint
-}
-
-// `getsockopt` and `setsockopt` represent boolean values as integers.
-#[cfg(not(windows))]
-type RawSocketBool = c::c_int;
-#[cfg(windows)]
-type RawSocketBool = BOOL;
-
-// Wrap `RawSocketBool` in a newtype to discourage misuse.
-#[repr(transparent)]
-#[derive(Copy, Clone)]
-struct SocketBool(RawSocketBool);
-
-// Convert from a `bool` to a `SocketBool`.
-#[inline]
-fn from_bool(value: bool) -> SocketBool {
-    SocketBool(value.into())
-}
-
-// Convert from a `SocketBool` to a `bool`.
-#[inline]
-fn to_bool(value: SocketBool) -> bool {
-    value.0 != 0
-}
-
-/// Convert to seconds, rounding up if necessary.
-#[inline]
-fn duration_to_secs<T: TryFrom<u64>>(duration: Duration) -> io::Result<T> {
-    let mut secs = duration.as_secs();
-    if duration.subsec_nanos() != 0 {
-        secs = secs.checked_add(1).ok_or(io::Errno::INVAL)?;
-    }
-    T::try_from(secs).map_err(|_e| io::Errno::INVAL)
-}