119 lines
3.0 KiB
Rust
119 lines
3.0 KiB
Rust
use super::constants::*;
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use super::router;
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use super::timers::{Events, Timers};
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use super::HandshakeJob;
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use super::bind::Bind;
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use super::tun::Tun;
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use std::fmt;
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use std::ops::Deref;
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use std::sync::atomic::{AtomicBool, AtomicU64, Ordering};
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use std::sync::Arc;
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use std::time::{Instant, SystemTime};
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use spin::{Mutex, RwLock, RwLockReadGuard, RwLockWriteGuard};
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use crossbeam_channel::Sender;
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use x25519_dalek::PublicKey;
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pub struct Peer<T: Tun, B: Bind> {
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pub router: Arc<router::Peer<B::Endpoint, Events<T, B>, T::Writer, B::Writer>>,
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pub state: Arc<PeerInner<B>>,
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}
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pub struct PeerInner<B: Bind> {
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// internal id (for logging)
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pub id: u64,
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// handshake state
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pub walltime_last_handshake: Mutex<SystemTime>,
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pub last_handshake_sent: Mutex<Instant>, // instant for last handshake
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pub handshake_queued: AtomicBool, // is a handshake job currently queued for the peer?
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pub queue: Mutex<Sender<HandshakeJob<B::Endpoint>>>, // handshake queue
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// stats and configuration
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pub pk: PublicKey, // public key, DISCUSS: avoid this. TODO: remove
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pub rx_bytes: AtomicU64, // received bytes
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pub tx_bytes: AtomicU64, // transmitted bytes
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// timer model
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pub timers: RwLock<Timers>,
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}
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impl<T: Tun, B: Bind> Clone for Peer<T, B> {
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fn clone(&self) -> Peer<T, B> {
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Peer {
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router: self.router.clone(),
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state: self.state.clone(),
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}
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}
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}
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impl<B: Bind> PeerInner<B> {
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#[inline(always)]
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pub fn timers(&self) -> RwLockReadGuard<Timers> {
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self.timers.read()
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}
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#[inline(always)]
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pub fn timers_mut(&self) -> RwLockWriteGuard<Timers> {
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self.timers.write()
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}
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}
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impl<T: Tun, B: Bind> fmt::Display for Peer<T, B> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "peer(id = {})", self.id)
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}
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}
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impl<T: Tun, B: Bind> Deref for Peer<T, B> {
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type Target = PeerInner<B>;
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fn deref(&self) -> &Self::Target {
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&self.state
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}
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}
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impl<T: Tun, B: Bind> Peer<T, B> {
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/// Bring the peer down. Causing:
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///
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/// - Timers to be stopped and disabled.
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/// - All keystate to be zeroed
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pub fn down(&self) {
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self.stop_timers();
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self.router.down();
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}
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/// Bring the peer up.
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pub fn up(&self) {
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self.router.up();
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self.start_timers();
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}
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}
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impl<B: Bind> PeerInner<B> {
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/* Queue a handshake request for the parallel workers
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* (if one does not already exist)
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*
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* The function is ratelimited.
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*/
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pub fn packet_send_handshake_initiation(&self) {
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// the function is rate limited
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{
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let mut lhs = self.last_handshake_sent.lock();
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if lhs.elapsed() < REKEY_TIMEOUT {
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return;
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}
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*lhs = Instant::now();
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}
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// create a new handshake job for the peer
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if !self.handshake_queued.swap(true, Ordering::SeqCst) {
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self.queue.lock().send(HandshakeJob::New(self.pk)).unwrap();
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}
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}
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}
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