use futures::sync::mpsc;
-use crate::printer::Printer;
+use crate::printer::{Printer, Stat};
+use crate::timeout_stream::TimeoutStream;
struct Route {
path: Vec<u32>,
impl BGPClient {
pub fn get_asn(&self, addr: IpAddr) -> u32 {
let mut path_vecs = self.routes.lock().unwrap().get_route_attrs(addr).clone();
+ if path_vecs.is_empty() { return 0; }
+
path_vecs.sort_unstable_by(|path_a, path_b| {
path_a.pref.cmp(&path_b.pref)
.then(path_b.path.len().cmp(&path_a.path.len()))
.then(path_b.med.cmp(&path_a.med))
});
- // TODO: Find last common ASN among all paths
- *path_vecs.first().map(|route| route.path.last().unwrap_or(&0)).unwrap_or(&0)
+
+ let primary_route = path_vecs.pop().unwrap();
+ 'asn_candidates: for asn in primary_route.path.iter().rev() {
+ for secondary_route in path_vecs.iter() {
+ if !secondary_route.path.contains(asn) {
+ continue 'asn_candidates;
+ }
+ }
+ return *asn;
+ }
+ *primary_route.path.last().unwrap_or(&0)
}
pub fn disconnect(&self) {
}
fn connect_given_client(addr: SocketAddr, timeout: Duration, printer: &'static Printer, client: Arc<BGPClient>) {
- let connect_timeout = Delay::new(Instant::now() + timeout.clone()).then(|_| {
- future::err(std::io::Error::new(std::io::ErrorKind::TimedOut, "timeout reached"))
- });
- let client_reconn = Arc::clone(&client);
- tokio::spawn(TcpStream::connect(&addr).select(connect_timeout)
- .or_else(move |_| {
- Delay::new(Instant::now() + timeout / 10).then(|_| {
- future::err(())
- })
- }).and_then(move |stream| {
- let (write, read) = Framed::new(stream.0, MsgCoder(printer)).split();
- let (mut sender, receiver) = mpsc::channel(10); // We never really should send more than 10 messages unless they're dumb
- tokio::spawn(write.sink_map_err(|_| { () }).send_all(receiver)
- .then(|_| {
+ tokio::spawn(Delay::new(Instant::now() + timeout / 4).then(move |_| {
+ let connect_timeout = Delay::new(Instant::now() + timeout.clone()).then(|_| {
+ future::err(std::io::Error::new(std::io::ErrorKind::TimedOut, "timeout reached"))
+ });
+ let client_reconn = Arc::clone(&client);
+ TcpStream::connect(&addr).select(connect_timeout)
+ .or_else(move |_| {
+ Delay::new(Instant::now() + timeout / 2).then(|_| {
future::err(())
+ })
+ }).and_then(move |stream| {
+ let (write, read) = Framed::new(stream.0, MsgCoder(printer)).split();
+ let (mut sender, receiver) = mpsc::channel(10); // We never really should send more than 10 messages unless they're dumb
+ tokio::spawn(write.sink_map_err(|_| { () }).send_all(receiver)
+ .then(|_| {
+ future::err(())
+ }));
+ let _ = sender.try_send(Message::Open(Open {
+ version: 4,
+ peer_asn: 23456,
+ hold_timer: timeout.as_secs() as u16,
+ identifier: 0x453b1215, // 69.59.18.21
+ parameters: vec![OpenParameter::Capabilities(vec![
+ OpenCapability::MultiProtocol((AFI::IPV4, SAFI::Unicast)),
+ OpenCapability::MultiProtocol((AFI::IPV6, SAFI::Unicast)),
+ OpenCapability::FourByteASN(397444),
+ OpenCapability::RouteRefresh,
+ OpenCapability::AddPath(vec![
+ (AFI::IPV4, SAFI::Unicast, AddPathDirection::ReceivePaths),
+ (AFI::IPV6, SAFI::Unicast, AddPathDirection::ReceivePaths)]),
+ ])]
}));
- let _ = sender.try_send(Message::Open(Open {
- version: 4,
- peer_asn: 23456,
- hold_timer: 120,
- identifier: 0x453b1215, // 69.59.18.21
- parameters: vec![OpenParameter::Capabilities(vec![
- OpenCapability::MultiProtocol((AFI::IPV4, SAFI::Unicast)),
- OpenCapability::MultiProtocol((AFI::IPV6, SAFI::Unicast)),
- OpenCapability::FourByteASN(397444),
- OpenCapability::RouteRefresh,
- OpenCapability::AddPath(vec![
- (AFI::IPV4, SAFI::Unicast, AddPathDirection::ReceivePaths),
- (AFI::IPV6, SAFI::Unicast, AddPathDirection::ReceivePaths)]),
- ])]
- }));
- read.for_each(move |bgp_msg| {
- if client.shutdown.load(Ordering::Relaxed) {
- return future::err(std::io::Error::new(std::io::ErrorKind::Other, "Shutting Down"));
- }
- match bgp_msg {
- Message::Open(_) => {
- client.routes.lock().unwrap().v4_table.clear();
- client.routes.lock().unwrap().v6_table.clear();
- printer.add_line("Connected to BGP route provider".to_string(), false);
- },
- Message::KeepAlive => {
- let _ = sender.try_send(Message::KeepAlive);
- },
- Message::Update(mut upd) => {
- upd.normalize();
- let mut route_table = client.routes.lock().unwrap();
- for r in upd.withdrawn_routes {
- route_table.withdraw(r);
- }
- if let Some(path) = Self::map_attrs(upd.attributes) {
- let path_arc = Arc::new(path);
- for r in upd.announced_routes {
- route_table.announce(r, Arc::clone(&path_arc));
+ TimeoutStream::new_persistent(read, timeout).for_each(move |bgp_msg| {
+ if client.shutdown.load(Ordering::Relaxed) {
+ return future::err(std::io::Error::new(std::io::ErrorKind::Other, "Shutting Down"));
+ }
+ match bgp_msg {
+ Message::Open(_) => {
+ client.routes.lock().unwrap().v4_table.clear();
+ client.routes.lock().unwrap().v6_table.clear();
+ printer.add_line("Connected to BGP route provider".to_string(), false);
+ },
+ Message::KeepAlive => {
+ let _ = sender.try_send(Message::KeepAlive);
+ },
+ Message::Update(mut upd) => {
+ upd.normalize();
+ let mut route_table = client.routes.lock().unwrap();
+ for r in upd.withdrawn_routes {
+ route_table.withdraw(r);
+ }
+ if let Some(path) = Self::map_attrs(upd.attributes) {
+ let path_arc = Arc::new(path);
+ for r in upd.announced_routes {
+ route_table.announce(r, Arc::clone(&path_arc));
+ }
}
- }
- },
- _ => {}
+ printer.set_stat(Stat::V4RoutingTableSize(route_table.v4_table.len()));
+ printer.set_stat(Stat::V6RoutingTableSize(route_table.v6_table.len()));
+ },
+ _ => {}
+ }
+ future::ok(())
+ }).or_else(move |e| {
+ printer.add_line(format!("Got error from BGP stream: {:?}", e), true);
+ future::ok(())
+ })
+ }).then(move |_| {
+ if !client_reconn.shutdown.load(Ordering::Relaxed) {
+ BGPClient::connect_given_client(addr, timeout, printer, client_reconn);
}
future::ok(())
- }).or_else(move |e| {
- printer.add_line(format!("Got error from BGP stream: {:?}", e), true);
- future::ok(())
})
- }).then(move |_| {
- if !client_reconn.shutdown.load(Ordering::Relaxed) {
- BGPClient::connect_given_client(addr, timeout, printer, client_reconn);
- }
- future::ok(())
})
);
}