From d4ba9f948f5acc5f6c22db0b5f2a1666262acc59 Mon Sep 17 00:00:00 2001
From: Tom Smeding <tom.smeding@gmail.com>
Date: Sat, 28 Mar 2020 21:23:36 +0100
Subject: controller: Set keepalive on sockets

---
 controller/src/lib.rs | 9 +++++++++
 utils/.gitignore      | 1 +
 utils/src/protocol.rs | 4 ++--
 3 files changed, 12 insertions(+), 2 deletions(-)
 create mode 100644 utils/.gitignore

diff --git a/controller/src/lib.rs b/controller/src/lib.rs
index b53502f..60b3639 100644
--- a/controller/src/lib.rs
+++ b/controller/src/lib.rs
@@ -120,6 +120,15 @@ enum ThreadCollect {
 async fn thread_handshake_handler(mut listener: TcpListener, sink: mpsc::Sender<ThreadCollect>) {
     loop {
         let (mut sock, _) = listener.accept().await.expect("Accept failed on TCP server socket");
+
+        // Error setting keepalive is not fatal
+        match sock.set_keepalive(Some(std::time::Duration::from_secs(60))) {
+            Ok(()) => {}
+            Err(e) => {
+                eprintln!("WARNING: Error setting keepalive on worker socket: {}", e);
+            }
+        }
+
         let mut sink = sink.clone();
         task::spawn(async move {
             let payload = encode_message(MessageBody::Version(1));
diff --git a/utils/.gitignore b/utils/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/utils/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/utils/src/protocol.rs b/utils/src/protocol.rs
index 4820f79..fce168d 100644
--- a/utils/src/protocol.rs
+++ b/utils/src/protocol.rs
@@ -23,7 +23,7 @@ pub struct RawMessage {
 impl RawMessage {
     pub fn receive(reader: &mut BufReader<TcpStream>) -> io::Result<Option<Self>> {
         let mut header = [0u8; 17];
-        if let Err(e) = reader.read(&mut header) {
+        if let Err(e) = reader.read_exact(&mut header) {
             if e.kind() == ErrorKind::UnexpectedEof { return Ok(None); }
             else { return Err(e); }
         }
@@ -34,7 +34,7 @@ impl RawMessage {
 
         let mut payload = Vec::new();
         payload.resize(length, 0u8);
-        if let Err(e) = reader.read(&mut payload) {
+        if let Err(e) = reader.read_exact(&mut payload) {
             if e.kind() == ErrorKind::UnexpectedEof { return Ok(None); }
             else { return Err(e); }
         }
-- 
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