s2n-quic-platform 0.88.0

Internal crate used by s2n-quic
Documentation 
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// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0

use super::c_int;

#[cfg(s2n_quic_platform_tos)]
mod tos_enabled {
    use super::*;
    use libc::{IPPROTO_IP, IP_RECVTOS, IP_TOS};

    pub const LEVEL: Option<c_int> = Some(IPPROTO_IP as _);
    pub const TYPE: Option<c_int> = Some(IP_TOS as _);
    pub const SOCKOPT: Option<(c_int, c_int)> = Some((IPPROTO_IP as _, IP_RECVTOS as _));
    pub const CMSG_SPACE: usize = crate::message::cmsg::size_of_cmsg::<super::Cmsg>();

    #[inline]
    pub const fn is_match(level: c_int, ty: c_int) -> bool {
        level == IPPROTO_IP as c_int && (ty == IP_TOS as c_int || ty == IP_RECVTOS as c_int)
    }
}

#[cfg(any(not(s2n_quic_platform_tos), test))]
mod tos_disabled {
    #![cfg_attr(test, allow(dead_code))]
    use super::*;

    pub const LEVEL: Option<c_int> = None;
    pub const TYPE: Option<c_int> = None;
    pub const SOCKOPT: Option<(c_int, c_int)> = None;
    pub const CMSG_SPACE: usize = 0;

    #[inline]
    pub const fn is_match(level: c_int, ty: c_int) -> bool {
        let _ = level;
        let _ = ty;
        false
    }
}

mod tos_impl {
    #[cfg(not(s2n_quic_platform_tos))]
    pub use super::tos_disabled::*;
    #[cfg(s2n_quic_platform_tos)]
    pub use super::tos_enabled::*;
}

pub use tos_impl::*;

// FreeBSD uses an unsigned_char for IP_TOS
// see https://svnweb.freebsd.org/base/stable/8/sys/netinet/ip_input.c?view=markup&pathrev=247944#l1716
#[cfg(target_os = "freebsd")]
pub type Cmsg = libc::c_uchar;
#[cfg(not(target_os = "freebsd"))]
pub type Cmsg = c_int;

pub const IS_SUPPORTED: bool = cfg!(s2n_quic_platform_tos);