From a5ba7d186a936fa8a91c80311a1450bf41eaf5b0 Mon Sep 17 00:00:00 2001
From: Tobias Wilken <tooangel@tooangel.de>
Date: Fri, 14 Aug 2026 21:24:16 +0200
Subject: [PATCH] Enable TCP keepalive on client socket

Chromecasts silently drop idle connections. Without SO_KEEPALIVE the
OS never probes, and the next write hangs until the caller's own
timeout fires. setKeepAlive(true, 10000) lets the OS detect dead
peers after ~10s of TCP-level idle.
---
 lib/client.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/client.js b/lib/client.js
index 786eae6..ae97170 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -40,6 +40,11 @@ Client.prototype.connect = function(options, callback) {
     self.emit('connect');
   });
 
+  // Chromecasts silently drop idle connections. Without SO_KEEPALIVE
+  // the OS never probes, so a dead socket looks alive until the next
+  // write hangs on the caller's own timeout.
+  this.socket.setKeepAlive(true, 10000);
+
   this.socket.on('error', onerror);
   this.socket.once('close', onclose);