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#[cfg(test)]
mod allocation_manager_test;
use super::*;
use crate::errors::*;
use crate::relay::*;
use std::collections::HashMap;
use util::{Conn, Error};
pub struct ManagerConfig {
pub relay_addr_generator: Box<dyn RelayAddressGenerator + Send + Sync>,
}
pub struct Manager {
allocations: AllocationMap,
reservations: Arc<Mutex<HashMap<String, u16>>>,
relay_addr_generator: Box<dyn RelayAddressGenerator + Send + Sync>,
}
impl Manager {
pub fn new(config: ManagerConfig) -> Self {
Manager {
allocations: Arc::new(Mutex::new(HashMap::new())),
reservations: Arc::new(Mutex::new(HashMap::new())),
relay_addr_generator: config.relay_addr_generator,
}
}
pub async fn close(&self) -> Result<(), Error> {
let allocations = self.allocations.lock().await;
for a in allocations.values() {
let mut a = a.lock().await;
a.close().await?;
}
Ok(())
}
pub async fn get_allocation(&self, five_tuple: &FiveTuple) -> Option<Arc<Mutex<Allocation>>> {
let allocations = self.allocations.lock().await;
if let Some(a) = allocations.get(&five_tuple.fingerprint()) {
Some(Arc::clone(a))
} else {
None
}
}
pub async fn create_allocation(
&self,
five_tuple: FiveTuple,
turn_socket: Arc<dyn Conn + Send + Sync>,
requested_port: u16,
lifetime: Duration,
) -> Result<Arc<Mutex<Allocation>>, Error> {
if lifetime == Duration::from_secs(0) {
return Err(ERR_LIFETIME_ZERO.to_owned());
}
if self.get_allocation(&five_tuple).await.is_some() {
return Err(ERR_DUPE_FIVE_TUPLE.to_owned());
}
let (relay_socket, relay_addr) = self
.relay_addr_generator
.allocate_conn(true, requested_port)
.await?;
let mut a = Allocation::new(turn_socket, relay_socket, relay_addr, five_tuple.clone());
a.allocations = Some(Arc::clone(&self.allocations));
log::debug!("listening on relay addr: {:?}", a.relay_addr);
a.start(lifetime).await;
a.packet_handler().await;
let a = Arc::new(Mutex::new(a));
{
let mut allocations = self.allocations.lock().await;
allocations.insert(five_tuple.fingerprint(), Arc::clone(&a));
}
Ok(a)
}
pub async fn delete_allocation(&self, five_tuple: &FiveTuple) {
let fingerprint = five_tuple.fingerprint();
let mut allocations = self.allocations.lock().await;
let allocation = allocations.remove(&fingerprint);
if let Some(a) = allocation {
let mut a = a.lock().await;
if let Err(err) = a.close().await {
log::error!("Failed to close allocation: {}", err);
}
}
}
pub async fn create_reservation(&self, reservation_token: String, port: u16) {
let reservations = Arc::clone(&self.reservations);
let reservation_token2 = reservation_token.clone();
tokio::spawn(async move {
let sleep = tokio::time::sleep(Duration::from_secs(30));
tokio::pin!(sleep);
tokio::select! {
_ = &mut sleep => {
let mut reservations = reservations.lock().await;
reservations.remove(&reservation_token2);
},
}
});
let mut reservations = self.reservations.lock().await;
reservations.insert(reservation_token, port);
}
pub async fn get_reservation(&self, reservation_token: &str) -> Option<u16> {
let reservations = self.reservations.lock().await;
if let Some(port) = reservations.get(reservation_token) {
Some(*port)
} else {
None
}
}
pub async fn get_random_even_port(&self) -> Result<u16, Error> {
let (_, addr) = self.relay_addr_generator.allocate_conn(true, 0).await?;
Ok(addr.port())
}
}