Move SimpleProtocol from core to libp2p. (#212)

cf. issue #200

core/src/upgrade/mod.rs

@@ -23,7 +23,6 @@ pub mod choice;
 pub mod denied;
 pub mod map;
 pub mod plaintext;
-pub mod simple;
 pub mod traits;
 
 pub use self::apply::apply;
@@ -31,5 +30,4 @@ pub use self::choice::{or, OrUpgrade};
 pub use self::denied::DeniedConnectionUpgrade;
 pub use self::map::map;
 pub use self::plaintext::PlainTextConfig;
-pub use self::simple::SimpleProtocol;
 pub use self::traits::{ConnectionUpgrade, Endpoint};

libp2p/Cargo.toml

@@ -16,6 +16,7 @@ libp2p-ping = { path = "../ping" }
 libp2p-relay = { path = "../relay" }
 libp2p-core = { path = "../core" }
 libp2p-websocket = { path = "../websocket" }
+tokio-io = "0.1"
 
 [target.'cfg(not(target_os = "emscripten"))'.dependencies]
 libp2p-dns = { path = "../dns" }

libp2p/examples/echo-dialer.rs

@@ -28,8 +28,9 @@ extern crate tokio_io;
 use futures::sync::oneshot;
 use futures::{Future, Sink, Stream};
 use std::env;
+use libp2p::SimpleProtocol;
 use libp2p::core::Transport;
-use libp2p::core::upgrade::{self, SimpleProtocol};
+use libp2p::core::upgrade;
 use libp2p::tcp::TcpConfig;
 use tokio_core::reactor::Core;
 use tokio_io::AsyncRead;

libp2p/examples/echo-server.rs

@@ -28,8 +28,9 @@ extern crate tokio_io;
 use futures::future::{loop_fn, Future, IntoFuture, Loop};
 use futures::{Sink, Stream};
 use std::env;
+use libp2p::SimpleProtocol;
 use libp2p::core::Transport;
-use libp2p::core::upgrade::{self, SimpleProtocol};
+use libp2p::core::upgrade;
 use libp2p::tcp::TcpConfig;
 use tokio_core::reactor::Core;
 use tokio_io::AsyncRead;

libp2p/examples/relay.rs

@@ -56,9 +56,10 @@ extern crate structopt;
 extern crate tokio_core;
 extern crate tokio_io;
 
+use libp2p::SimpleProtocol;
 use libp2p::core::Multiaddr;
 use libp2p::core::transport::Transport;
-use libp2p::core::upgrade::{self, SimpleProtocol};
+use libp2p::core::upgrade;
 use futures::{future::{self, Either, Loop, loop_fn}, prelude::*};
 use libp2p::peerstore::{PeerAccess, PeerId, Peerstore, memory_peerstore::MemoryPeerstore};
 use libp2p::relay::{RelayConfig, RelayTransport};

libp2p/src/lib.rs

@@ -23,6 +23,7 @@ pub extern crate futures;
 #[cfg(not(target_os = "emscripten"))]
 pub extern crate tokio_core;
 pub extern crate multiaddr;
+pub extern crate tokio_io;
 
 pub extern crate libp2p_core as core;
 #[cfg(not(target_os = "emscripten"))]
@@ -42,9 +43,12 @@ pub extern crate libp2p_secio as secio;
 pub extern crate libp2p_tcp_transport as tcp;
 pub extern crate libp2p_websocket as websocket;
 
+pub mod simple;
+
 pub use self::core::{Transport, ConnectionUpgrade, swarm};
 pub use self::multiaddr::Multiaddr;
 pub use self::peerstore::PeerId;
+pub use self::simple::SimpleProtocol;
 
 /// Implementation of `Transport` that supports the most common protocols.
 ///

libp2p/src/simple.rs

@@ -19,12 +19,11 @@
 // DEALINGS IN THE SOFTWARE.
 
 use bytes::Bytes;
-use futures::future::FromErr;
-use futures::prelude::*;
+use core::upgrade::{ConnectionUpgrade, Endpoint};
+use futures::{future::FromErr, prelude::*};
 use multiaddr::Multiaddr;
 use std::{iter, io::Error as IoError, sync::Arc};
 use tokio_io::{AsyncRead, AsyncWrite};
-use upgrade::{ConnectionUpgrade, Endpoint};
 
 /// Implementation of `ConnectionUpgrade`. Convenient to use with small protocols.
 #[derive(Debug)]

relay/src/protocol.rs

@@ -20,8 +20,7 @@
 
 use bytes::Bytes;
 use core::{ConnectionUpgrade, Endpoint, Transport};
-use core::upgrade::SimpleProtocol;
-use futures::{stream, future::{self, Either::{A, B}}, prelude::*};
+use futures::{stream, future::{self, Either::{A, B}, FutureResult}, prelude::*};
 use message::{CircuitRelay, CircuitRelay_Peer, CircuitRelay_Status, CircuitRelay_Type};
 use multiaddr::Multiaddr;
 use peerstore::{PeerAccess, PeerId, Peerstore};
@@ -137,8 +136,7 @@ where
 
         let stop = stop_message(&from, &dest);
 
-        let upgrade = SimpleProtocol::new("/libp2p/relay/circuit/0.1.0", Ok);
-        let transport = self.transport.with_upgrade(upgrade);
+        let transport = self.transport.with_upgrade(TrivialUpgrade);
         let dest_id = dest.id;
         let future = stream::iter_ok(dest.addrs.into_iter())
             .and_then(move |dest_addr| {
@@ -240,6 +238,28 @@ fn stop_message(from: &Peer, dest: &Peer) -> CircuitRelay {
     msg
 }
 
+#[derive(Debug, Clone)]
+struct TrivialUpgrade;
+
+impl<C> ConnectionUpgrade<C> for TrivialUpgrade
+where
+    C: AsyncRead + AsyncWrite + 'static
+{
+    type NamesIter = iter::Once<(Bytes, Self::UpgradeIdentifier)>;
+    type UpgradeIdentifier = ();
+
+    fn protocol_names(&self) -> Self::NamesIter {
+        iter::once((Bytes::from("/libp2p/relay/circuit/0.1.0"), ()))
+    }
+
+    type Output = C;
+    type Future = FutureResult<Self::Output, io::Error>;
+
+    fn upgrade(self, conn: C, _: (), _: Endpoint, _: &Multiaddr) -> Self::Future {
+        future::ok(conn)
+    }
+}
+
 #[derive(Debug, Clone)]
 pub(crate) struct Source(pub(crate) CircuitRelay);