#![cfg_attr(docsrs, feature(doc_cfg))]

#![doc = include_str!("../README.md")]

// @@ begin lint list maintained by maint/add_warning @@

#![allow(renamed_and_removed_lints)] // @@REMOVE_WHEN(ci_arti_stable)

#![allow(unknown_lints)] // @@REMOVE_WHEN(ci_arti_nightly)

#![warn(missing_docs)]

#![warn(noop_method_call)]

#![warn(unreachable_pub)]

#![warn(clippy::all)]

#![deny(clippy::await_holding_lock)]

#![deny(clippy::cargo_common_metadata)]

#![deny(clippy::cast_lossless)]

#![deny(clippy::checked_conversions)]

#![warn(clippy::cognitive_complexity)]

#![deny(clippy::debug_assert_with_mut_call)]

#![deny(clippy::exhaustive_enums)]

#![deny(clippy::exhaustive_structs)]

#![deny(clippy::expl_impl_clone_on_copy)]

#![deny(clippy::fallible_impl_from)]

#![deny(clippy::implicit_clone)]

#![deny(clippy::large_stack_arrays)]

#![warn(clippy::manual_ok_or)]

#![deny(clippy::missing_docs_in_private_items)]

#![warn(clippy::needless_borrow)]

#![warn(clippy::needless_pass_by_value)]

#![warn(clippy::option_option)]

#![deny(clippy::print_stderr)]

#![deny(clippy::print_stdout)]

#![warn(clippy::rc_buffer)]

#![deny(clippy::ref_option_ref)]

#![warn(clippy::semicolon_if_nothing_returned)]

#![warn(clippy::trait_duplication_in_bounds)]

#![deny(clippy::unchecked_time_subtraction)]

#![deny(clippy::unnecessary_wraps)]

#![warn(clippy::unseparated_literal_suffix)]

#![deny(clippy::unwrap_used)]

#![deny(clippy::mod_module_files)]

#![allow(clippy::let_unit_value)] // This can reasonably be done for explicitness

#![allow(clippy::uninlined_format_args)]

#![allow(clippy::significant_drop_in_scrutinee)] // arti/-/merge_requests/588/#note_2812945

#![allow(clippy::result_large_err)] // temporary workaround for arti#587

#![allow(clippy::needless_raw_string_hashes)] // complained-about code is fine, often best

#![allow(clippy::needless_lifetimes)] // See arti#1765

#![allow(mismatched_lifetime_syntaxes)] // temporary workaround for arti#2060

#![allow(clippy::collapsible_if)] // See arti#2342

#![deny(clippy::unused_async)]

//! <!-- @@ end lint list maintained by maint/add_warning @@ -->

// TODO #2010: Remove this global allow, and either propagate it to the functions that need it,

// or make those functions less complex.

#![allow(clippy::cognitive_complexity)]

// TODO #1645 (either remove this, or decide to have it everywhere)

#![cfg_attr(

    not(all(feature = "full", feature = "experimental")),

    allow(unused, unreachable_pub)

)]

#[cfg(feature = "bench")]

pub mod bench_utils;

pub mod channel;

pub mod circuit;

pub mod client;

pub(crate) mod conflux;

mod congestion;

mod crypto;

pub mod memquota;

pub mod peer;

mod stream;

pub(crate) mod streammap;

pub(crate) mod tunnel;

mod util;

#[cfg(feature = "relay")]

pub mod relay;

#[cfg(feature = "relay")]

pub use relay::channel::{RelayChannelBuilder, RelayIdentities};

pub use util::err::{Error, ResolveError};

pub use util::skew::ClockSkew;

pub use channel::params::ChannelPaddingInstructions;

pub use client::{ClientTunnel, HopLocation, TargetHop, channel::ClientChannelBuilder};

pub use congestion::params as ccparams;

pub use crypto::cell::{HopNum, HopNumDisplay};

pub use stream::flow_ctrl::params::{CellCount, FlowCtrlParameters};

#[cfg(feature = "send-control-msg")]

pub use {

    crate::client::Conversation,

    crate::client::msghandler::{MsgHandler, UserMsgHandler},

    crate::client::reactor::MetaCellDisposition,

};

/// A Result type for this crate.

pub type Result<T> = std::result::Result<T, Error>;

use std::fmt::Debug;

use tor_memquota::{

    HasMemoryCost,

    mq_queue::{self, ChannelSpec as _},

};

use tor_rtcompat::DynTimeProvider;

#[doc(hidden)]

pub use {derive_deftly, tor_memquota};

/// Timestamp object that we update whenever we get incoming traffic.

///

/// Used to implement [`time_since_last_incoming_traffic`]

static LAST_INCOMING_TRAFFIC: util::ts::AtomicOptTimestamp = util::ts::AtomicOptTimestamp::new();

/// Called whenever we receive incoming traffic.

///

/// Used to implement [`time_since_last_incoming_traffic`]

#[inline]

/// Return the amount of time since we last received "incoming traffic".

///

/// This is a global counter, and is subject to interference from

/// other users of the `tor_proto`.  Its only permissible use is for

/// checking how recently we have been definitely able to receive

/// incoming traffic.

///

/// When enabled, this timestamp is updated whenever we receive a valid

/// cell, and whenever we complete a channel handshake.

///

/// Returns `None` if we never received "incoming traffic".

/// Make an MPSC queue, of any type, that participates in memquota, but a fake one for testing

#[cfg(any(test, feature = "testing"))] // Used by Channel::new_fake which is also feature=testing

            // The fake Account doesn't care about the data ages, so this will do.

            //

            // Thiw would be wrong to use generally in tests, where we might want to mock time,

            // since we end up, here with totally *different* mocked time.

            // But it's OK here, and saves passing a runtime parameter into this function.

        )

/// Return a list of the protocols [supported](tor_protover::doc_supported)

/// by this crate, running as a client.

    use tor_protover::named::*;

    // WARNING: REMOVING ELEMENTS FROM THIS LIST CAN BE DANGEROUS!

    // SEE [`tor_protover::doc_changing`]

        LINK_V4,

        LINK_V5,

        LINKAUTH_ED25519_SHA256_EXPORTER,

        FLOWCTRL_AUTH_SENDME,

        RELAY_NTOR,

        RELAY_EXTEND_IPv6,

        RELAY_NTORV3,

        RELAY_NEGOTIATE_SUBPROTO,

    ];

    #[cfg(feature = "flowctl-cc")]

    #[cfg(feature = "counter-galois-onion")]

#[cfg(test)]

mod test {

    // @@ begin test lint list maintained by maint/add_warning @@

    #![allow(clippy::bool_assert_comparison)]

    #![allow(clippy::clone_on_copy)]

    #![allow(clippy::dbg_macro)]

    #![allow(clippy::mixed_attributes_style)]

    #![allow(clippy::print_stderr)]

    #![allow(clippy::print_stdout)]

    #![allow(clippy::single_char_pattern)]

    #![allow(clippy::unwrap_used)]

    #![allow(clippy::unchecked_time_subtraction)]

    #![allow(clippy::useless_vec)]

    #![allow(clippy::needless_pass_by_value)]

    //! <!-- @@ end test lint list maintained by maint/add_warning @@ -->

    use cfg_if::cfg_if;

    use super::*;

    #[test]

    fn protocols() {

        let pr = supported_client_protocols();

        cfg_if! {

            if #[cfg(all(feature="flowctl-cc", feature="counter-galois-onion"))] {

                let expected = "FlowCtrl=1-2 Link=4-5 LinkAuth=3 Relay=2-6".parse().unwrap();

            } else if #[cfg(feature="flowctl-cc")] {

                let expected = "FlowCtrl=1-2 Link=4-5 LinkAuth=3 Relay=2-5".parse().unwrap();

                // (Note that we don't have to check for cgo without cc, since that isn't possible.)

            } else {

                let expected = "FlowCtrl=1 Link=4-5 LinkAuth=3 Relay=2-5".parse().unwrap();

            }

        }

        assert_eq!(pr, expected);

    }

}