From f81cc0802713e621ea33cfe4bca3f39eb0bdcc72 Mon Sep 17 00:00:00 2001
From: Pierre Krieger <pierre.krieger1708@gmail.com>
Date: Thu, 15 Mar 2018 16:08:49 +0100
Subject: [PATCH] Add logging to tcp-transport (#141)

---
 libp2p-tcp-transport/Cargo.toml | 1 +
 libp2p-tcp-transport/src/lib.rs | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/libp2p-tcp-transport/Cargo.toml b/libp2p-tcp-transport/Cargo.toml
index 5a0f50b0..3ab8827c 100644
--- a/libp2p-tcp-transport/Cargo.toml
+++ b/libp2p-tcp-transport/Cargo.toml
@@ -5,6 +5,7 @@ authors = ["Parity Technologies <admin@parity.io>"]
 
 [dependencies]
 libp2p-swarm = { path = "../libp2p-swarm" }
+log = "0.4.1"
 futures = "0.1"
 multiaddr = "0.2.0"
 tokio-core = "0.1"
diff --git a/libp2p-tcp-transport/src/lib.rs b/libp2p-tcp-transport/src/lib.rs
index 90f88e86..e6343965 100644
--- a/libp2p-tcp-transport/src/lib.rs
+++ b/libp2p-tcp-transport/src/lib.rs
@@ -51,6 +51,8 @@
 
 extern crate futures;
 extern crate libp2p_swarm as swarm;
+#[macro_use]
+extern crate log;
 extern crate multiaddr;
 extern crate tokio_core;
 extern crate tokio_io;
@@ -109,12 +111,15 @@ impl Transport for TcpConfig {
                 Err(_) => addr,
             };
 
+            debug!(target: "libp2p-tcp-transport", "Now listening on {}", new_addr);
+
             let future = future::result(listener)
                 .map(|listener| {
                     // Pull out a stream of sockets for incoming connections
                     listener.incoming().map(|(sock, addr)| {
                         let addr = addr.to_multiaddr()
                             .expect("generating a multiaddr from a socket addr never fails");
+                        debug!(target: "libp2p-tcp-transport", "Incoming connection from {}", addr);
                         Ok((sock, addr)).into_future()
                     })
                 })
@@ -130,6 +135,7 @@ impl Transport for TcpConfig {
     /// or gives back the multiaddress.
     fn dial(self, addr: Multiaddr) -> Result<Self::Dial, (Self, Multiaddr)> {
         if let Ok(socket_addr) = multiaddr_to_socketaddr(&addr) {
+            debug!(target: "libp2p-tcp-transport", "Dialing {}", addr);
             let fut = TcpStream::connect(&socket_addr, &self.event_loop).map(|t| (t, addr));
             Ok(Box::new(fut) as Box<_>)
         } else {