Fix handling of unset idle timeout

quinn-proto/src/connection.rs

@@ -692,8 +692,12 @@ impl Connection {
     }
 
     pub fn reset_idle_timeout(&mut self, config: &Config, now: u64) {
-        let dt = cmp::min(config.idle_timeout, self.params.idle_timeout) as u64 * 1_000_000;
-        self.set_idle = Some(Some(now + dt));
+        let dt = if config.idle_timeout == 0 || self.params.idle_timeout == 0 {
+            cmp::max(config.idle_timeout, self.params.idle_timeout)
+        } else {
+            cmp::min(config.idle_timeout, self.params.idle_timeout)
+        };
+        self.set_idle = Some(Some(now + dt as u64 * 1_000_000));
     }
 
     /// Consider all previously transmitted handshake packets to be delivered. Called when we receive a new handshake packet.

quinn-proto/src/endpoint.rs

@@ -32,7 +32,7 @@ pub struct Config {
     pub max_remote_uni_streams: u16,
     /// Maximum duration of inactivity to accept before timing out the connection (s).
     ///
-    /// Maximum value is 600 seconds. The actual value used is the minimum of this and the peer's own idle timeout.
+    /// Maximum value is 600 seconds. The actual value used is the minimum of this and the peer's own idle timeout. 0 for none.
     pub idle_timeout: u16,
     /// Maximum number of bytes the peer may transmit on any one stream before becoming blocked.
     ///