1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0

use crate::{connection, endpoint};
use core::{ops::RangeInclusive, time::Duration};

mod generated;
pub use generated::*;

/// All event types which can be emitted from this library.
pub trait Event: core::fmt::Debug {
    const NAME: &'static str;
}

pub trait IntoEvent<Target> {
    fn into_event(self) -> Target;
}

macro_rules! ident_into_event {
    ($($name:ty),* $(,)?) => {
        $(
            impl IntoEvent<$name> for $name {
                #[inline]
                fn into_event(self) -> Self {
                    self
                }
            }
        )*
    };
}

macro_rules! borrowed_into_event {
    ($($name:ty),* $(,)?) => {
        $(
            impl<'a> IntoEvent<&'a $name> for &'a $name {
                #[inline]
                fn into_event(self) -> Self {
                    self
                }
            }
        )*
    };
}

ident_into_event!(
    u8,
    i8,
    u16,
    i16,
    u32,
    i32,
    u64,
    i64,
    usize,
    isize,
    f32,
    Duration,
    bool,
    connection::Error,
    endpoint::Location,
);
borrowed_into_event!([u8; 4], [u8; 16], [u8], [u32], [&'a [u8]]);

impl<T: IntoEvent<U>, U> IntoEvent<Option<U>> for Option<T> {
    #[inline]
    fn into_event(self) -> Option<U> {
        self.map(IntoEvent::into_event)
    }
}

impl<'a> IntoEvent<&'a str> for &'a str {
    #[inline]
    fn into_event(self) -> Self {
        self
    }
}

impl<T> IntoEvent<RangeInclusive<T>> for RangeInclusive<T> {
    #[inline]
    fn into_event(self) -> RangeInclusive<T> {
        self
    }
}

#[derive(Clone, Debug, Copy)]
pub struct Timestamp(crate::time::Timestamp);

impl Timestamp {
    /// The duration since the start of the s2n-quic process.
    ///
    /// Record the start `SystemTime` at the start of the program
    /// to derive the absolute time at which an event is emitted.
    ///
    /// ```rust
    /// # use s2n_quic_core::{
    /// #    endpoint,
    /// #    event::{self, IntoEvent},
    /// #    time::{Duration, Timestamp},
    /// # };
    ///
    /// let start_time = std::time::SystemTime::now();
    /// // `meta` is included as part of each event
    /// # let meta: event::api::ConnectionMeta = event::builder::ConnectionMeta {
    /// #     endpoint_type: endpoint::Type::Server,
    /// #     id: 0,
    /// #     timestamp: unsafe { Timestamp::from_duration(Duration::from_secs(1) )},
    /// # }.into_event();
    /// let event_time = start_time + meta.timestamp.duration_since_start();
    /// ```
    pub fn duration_since_start(&self) -> Duration {
        // Safety: the duration is relative to start of program. This function along
        // with it's documentation captures this intent.
        unsafe { self.0.as_duration() }
    }

    /// Returns the `Duration` which elapsed since an earlier `Timestamp`.
    /// If `earlier` is more recent, the method returns a `Duration` of 0.
    #[inline]
    pub fn saturating_duration_since(self, earlier: Self) -> Duration {
        self.0.saturating_duration_since(earlier.0)
    }
}

impl IntoEvent<Timestamp> for crate::time::Timestamp {
    #[inline]
    fn into_event(self) -> Timestamp {
        Timestamp(self)
    }
}

#[derive(Clone)]
pub struct TlsSession<'a> {
    session: &'a dyn crate::crypto::tls::TlsSession,
}

impl<'a> TlsSession<'a> {
    #[doc(hidden)]
    pub fn new(session: &'a dyn crate::crypto::tls::TlsSession) -> TlsSession<'a> {
        TlsSession { session }
    }

    pub fn tls_exporter(
        &self,
        label: &[u8],
        context: &[u8],
        output: &mut [u8],
    ) -> Result<(), crate::crypto::tls::TlsExportError> {
        self.session.tls_exporter(label, context, output)
    }

    pub fn cipher_suite(&self) -> crate::event::api::CipherSuite {
        self.session.cipher_suite().into_event()
    }
}

impl<'a> crate::event::IntoEvent<TlsSession<'a>> for TlsSession<'a> {
    #[inline]
    fn into_event(self) -> Self {
        self
    }
}

impl core::fmt::Debug for TlsSession<'_> {
    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
        f.debug_struct("TlsSession").finish_non_exhaustive()
    }
}