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use super::timers::Timers;
use super::tun::Tun;
use super::udp::UDP;
use super::constants::REKEY_TIMEOUT;
use super::wireguard::WireGuard;
use super::workers::HandshakeJob;
use std::fmt;
use std::sync::atomic::{AtomicBool, AtomicU64, Ordering};
use std::time::{Instant, SystemTime};
use spin::{Mutex, RwLock, RwLockReadGuard, RwLockWriteGuard};
use x25519_dalek::PublicKey;
pub struct PeerInner<T: Tun, B: UDP> {
// internal id (for logging)
pub id: u64,
// wireguard device state
pub wg: WireGuard<T, B>,
// TODO: eliminate
pub pk: PublicKey,
// handshake state
pub walltime_last_handshake: Mutex<Option<SystemTime>>, /* walltime for last handshake (for UAPI status) */
pub last_handshake_sent: Mutex<Instant>, // instant for last handshake
pub handshake_queued: AtomicBool, // is a handshake job currently queued?
// stats and configuration
pub rx_bytes: AtomicU64, // received bytes
pub tx_bytes: AtomicU64, // transmitted bytes
// timer model
pub timers: RwLock<Timers>,
}
impl<T: Tun, B: UDP> PeerInner<T, B> {
/* Queue a handshake request for the parallel workers
* (if one does not already exist)
*
* The function is ratelimited.
*/
pub fn packet_send_handshake_initiation(&self) {
log::trace!("{} : packet_send_handshake_initiation", self);
// the function is rate limited
{
let mut lhs = self.last_handshake_sent.lock();
if lhs.elapsed() < REKEY_TIMEOUT {
log::trace!("{} : packet_send_handshake_initiation, rate-limited!", self);
return;
}
*lhs = Instant::now();
}
// create a new handshake job for the peer
if !self.handshake_queued.swap(true, Ordering::SeqCst) {
self.wg.pending.fetch_add(1, Ordering::SeqCst);
self.wg.queue.send(HandshakeJob::New(self.pk));
log::trace!(
"{} : packet_send_handshake_initiation, handshake queued",
self
);
} else {
log::trace!(
"{} : packet_send_handshake_initiation, handshake already queued",
self
);
}
}
#[inline(always)]
pub fn timers(&self) -> RwLockReadGuard<Timers> {
self.timers.read()
}
#[inline(always)]
pub fn timers_mut(&self) -> RwLockWriteGuard<Timers> {
self.timers.write()
}
}
impl<T: Tun, B: UDP> fmt::Display for PeerInner<T, B> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "peer(id = {})", self.id)
}
}
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