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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,138 @@ | ||
| // Copyright 2024 - Nym Technologies SA <[email protected]> | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
|
|
||
| use crate::error::Error; | ||
| use defguard_wireguard_rs::host::Peer; | ||
| use nym_gateway_storage::models::WireguardPeer; | ||
| use nym_gateway_storage::Storage; | ||
| use std::time::Duration; | ||
| use time::OffsetDateTime; | ||
|
|
||
| const DEFAULT_PEER_MAX_FLUSHING_RATE: Duration = Duration::from_secs(5); | ||
| const DEFAULT_PEER_MAX_DELTA_FLUSHING_AMOUNT: u64 = 512 * 1024; // 512kB | ||
|
|
||
| #[derive(Debug, Clone, Copy)] | ||
| pub struct PeerFlushingBehaviourConfig { | ||
| /// Defines maximum delay between peer information being flushed to the persistent storage. | ||
| pub peer_max_flushing_rate: Duration, | ||
|
|
||
| /// Defines a maximum change in peer before it gets flushed to the persistent storage. | ||
| pub peer_max_delta_flushing_amount: u64, | ||
| } | ||
|
|
||
| impl Default for PeerFlushingBehaviourConfig { | ||
| fn default() -> Self { | ||
| Self { | ||
| peer_max_flushing_rate: DEFAULT_PEER_MAX_FLUSHING_RATE, | ||
| peer_max_delta_flushing_amount: DEFAULT_PEER_MAX_DELTA_FLUSHING_AMOUNT, | ||
| } | ||
| } | ||
| } | ||
|
|
||
| pub struct PeerStorageManager<S> { | ||
| pub(crate) storage: S, | ||
| pub(crate) peer_information: Option<PeerInformation>, | ||
| pub(crate) cfg: PeerFlushingBehaviourConfig, | ||
| pub(crate) with_client_id: bool, | ||
| } | ||
|
|
||
| impl<S: Storage + Clone + 'static> PeerStorageManager<S> { | ||
| pub(crate) fn new(storage: S, peer: Peer, with_client_id: bool) -> Self { | ||
| let peer_information = Some(PeerInformation::new(peer)); | ||
| Self { | ||
| storage, | ||
| peer_information, | ||
| cfg: PeerFlushingBehaviourConfig::default(), | ||
| with_client_id, | ||
| } | ||
| } | ||
|
|
||
| pub(crate) fn get_peer(&self) -> Option<WireguardPeer> { | ||
| self.peer_information | ||
| .as_ref() | ||
| .map(|p| p.peer.clone().into()) | ||
| } | ||
|
|
||
| pub(crate) fn remove_peer(&mut self) { | ||
| self.peer_information = None; | ||
| } | ||
|
|
||
| pub(crate) fn update_trx(&mut self, kernel_peer: &Peer) { | ||
| if let Some(peer_information) = self.peer_information.as_mut() { | ||
| peer_information.update_trx_bytes(kernel_peer.tx_bytes, kernel_peer.rx_bytes); | ||
| } | ||
| } | ||
|
|
||
| pub(crate) async fn sync_storage_peer(&mut self) -> Result<(), Error> { | ||
| let Some(peer_information) = self.peer_information.as_mut() else { | ||
| return Ok(()); | ||
| }; | ||
| if !peer_information.should_sync(self.cfg) { | ||
| return Ok(()); | ||
| } | ||
| if self | ||
| .storage | ||
| .get_wireguard_peer(&peer_information.peer().public_key.to_string()) | ||
| .await? | ||
| .is_none() | ||
| { | ||
| self.peer_information = None; | ||
| return Ok(()); | ||
| } | ||
| self.storage | ||
| .insert_wireguard_peer(peer_information.peer(), self.with_client_id) | ||
| .await?; | ||
|
|
||
| peer_information.resync_peer_with_storage(); | ||
|
|
||
| Ok(()) | ||
| } | ||
| } | ||
|
|
||
| #[derive(Clone, Debug)] | ||
| pub(crate) struct PeerInformation { | ||
| pub(crate) peer: Peer, | ||
| pub(crate) last_synced: OffsetDateTime, | ||
|
|
||
| pub(crate) bytes_delta_since_sync: u64, | ||
| } | ||
|
|
||
| impl PeerInformation { | ||
| pub fn new(peer: Peer) -> PeerInformation { | ||
| PeerInformation { | ||
| peer, | ||
| last_synced: OffsetDateTime::now_utc(), | ||
| bytes_delta_since_sync: 0, | ||
| } | ||
| } | ||
|
|
||
| pub(crate) fn should_sync(&self, cfg: PeerFlushingBehaviourConfig) -> bool { | ||
| if self.bytes_delta_since_sync >= cfg.peer_max_delta_flushing_amount { | ||
| return true; | ||
| } | ||
|
|
||
| if self.last_synced + cfg.peer_max_flushing_rate < OffsetDateTime::now_utc() | ||
| && self.bytes_delta_since_sync != 0 | ||
| { | ||
| return true; | ||
| } | ||
|
|
||
| false | ||
| } | ||
|
|
||
| pub(crate) fn peer(&self) -> &Peer { | ||
| &self.peer | ||
| } | ||
|
|
||
| pub(crate) fn update_trx_bytes(&mut self, tx_bytes: u64, rx_bytes: u64) { | ||
| self.bytes_delta_since_sync += tx_bytes.saturating_sub(self.peer.tx_bytes) | ||
| + rx_bytes.saturating_sub(self.peer.rx_bytes); | ||
| self.peer.tx_bytes = tx_bytes; | ||
| self.peer.rx_bytes = rx_bytes; | ||
| } | ||
|
|
||
| pub(crate) fn resync_peer_with_storage(&mut self) { | ||
| self.bytes_delta_since_sync = 0; | ||
| self.last_synced = OffsetDateTime::now_utc(); | ||
| } | ||
| } |