forked from cloudflare/boringtun
/
peer.rs
169 lines (140 loc) · 4.55 KB
/
peer.rs
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// Copyright (c) 2019 Cloudflare, Inc. All rights reserved.
// SPDX-License-Identifier: BSD-3-Clause
use parking_lot::RwLock;
use slog::info;
use std::net::IpAddr;
use std::net::SocketAddr;
use std::str::FromStr;
use std::sync::Arc;
use crate::device::{AllowedIps, Error};
use crate::noise::{Tunn, TunnResult};
use crate::device::udp::UDPSocket;
#[derive(Default, Debug)]
pub struct Endpoint {
pub addr: Option<SocketAddr>,
pub conn: Option<Arc<UDPSocket>>,
}
pub struct Peer {
pub(crate) tunnel: Box<Tunn>, // The associated tunnel struct
index: u32, // The index the tunnel uses
endpoint: RwLock<Endpoint>,
allowed_ips: AllowedIps<()>,
preshared_key: Option<[u8; 32]>,
}
#[derive(Debug)]
pub struct AllowedIP {
pub addr: IpAddr,
pub cidr: u8,
}
impl FromStr for AllowedIP {
type Err = String;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let ip: Vec<&str> = s.split('/').collect();
if ip.len() != 2 {
return Err("Invalid IP format".to_owned());
}
let (addr, cidr) = (ip[0].parse::<IpAddr>(), ip[1].parse::<u8>());
match (addr, cidr) {
(Ok(addr @ IpAddr::V4(_)), Ok(cidr)) if cidr <= 32 => Ok(AllowedIP { addr, cidr }),
(Ok(addr @ IpAddr::V6(_)), Ok(cidr)) if cidr <= 128 => Ok(AllowedIP { addr, cidr }),
_ => Err("Invalid IP format".to_owned()),
}
}
}
impl Peer {
pub fn new(
tunnel: Box<Tunn>,
index: u32,
endpoint: Option<SocketAddr>,
allowed_ips: &[AllowedIP],
preshared_key: Option<[u8; 32]>,
) -> Peer {
Peer {
tunnel,
index,
endpoint: RwLock::new(Endpoint {
addr: endpoint,
conn: None,
}),
allowed_ips: allowed_ips.iter().map(|ip| (ip, ())).collect(),
preshared_key,
}
}
pub fn update_timers<'a>(&self, dst: &'a mut [u8]) -> TunnResult<'a> {
self.tunnel.update_timers(dst)
}
pub fn endpoint(&self) -> parking_lot::RwLockReadGuard<'_, Endpoint> {
self.endpoint.read()
}
pub fn shutdown_endpoint(&self) {
if let Some(conn) = self.endpoint.write().conn.take() {
info!(self.tunnel.logger, "Disconnecting from endpoint");
conn.shutdown();
}
}
pub fn set_endpoint(&self, addr: SocketAddr) {
let mut endpoint = self.endpoint.write();
if endpoint.addr != Some(addr) {
// We only need to update the endpoint if it differs from the current one
if let Some(conn) = endpoint.conn.take() {
conn.shutdown();
}
*endpoint = Endpoint {
addr: Some(addr),
conn: None,
}
};
}
pub fn connect_endpoint(
&self,
port: u16,
fwmark: Option<u32>,
) -> Result<Arc<UDPSocket>, Error> {
let mut endpoint = self.endpoint.write();
if endpoint.conn.is_some() {
return Err(Error::Connect("Connected".to_owned()));
}
let udp_conn = Arc::new(match endpoint.addr {
Some(addr @ SocketAddr::V4(_)) => UDPSocket::new()?
.set_non_blocking()?
.set_reuse()?
.bind(port)?
.connect(&addr)?,
Some(addr @ SocketAddr::V6(_)) => UDPSocket::new6()?
.set_non_blocking()?
.set_reuse()?
.bind(port)?
.connect(&addr)?,
None => panic!("Attempt to connect to undefined endpoint"),
});
if let Some(fwmark) = fwmark {
udp_conn.set_fwmark(fwmark)?;
}
info!(
self.tunnel.logger,
"Connected endpoint :{}->{}",
port,
endpoint.addr.unwrap()
);
endpoint.conn = Some(Arc::clone(&udp_conn));
Ok(udp_conn)
}
pub fn is_allowed_ip<I: Into<IpAddr>>(&self, addr: I) -> bool {
self.allowed_ips.find(addr.into()).is_some()
}
pub fn allowed_ips(&self) -> impl Iterator<Item = (IpAddr, u8)> + '_ {
self.allowed_ips.iter().map(|(_, ip, cidr)| (ip, cidr))
}
pub fn time_since_last_handshake(&self) -> Option<std::time::Duration> {
self.tunnel.time_since_last_handshake()
}
pub fn persistent_keepalive(&self) -> Option<u16> {
self.tunnel.persistent_keepalive()
}
pub fn preshared_key(&self) -> Option<&[u8; 32]> {
self.preshared_key.as_ref()
}
pub fn index(&self) -> u32 {
self.index
}
}