From a486bb5fcf59eeba5b454f6132067d6ef0dea7fb Mon Sep 17 00:00:00 2001
From: Egor <egor@patchysicp.xyz>
Date: Wed, 19 Mar 2025 01:55:05 +0200
Subject: [PATCH] add tcp keepalive

---
 src/main.cpp | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/main.cpp b/src/main.cpp
index 8ef6a35..8ce6856 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -79,6 +79,24 @@ static void accept_from_sock(struct listener *listener)
 		// Set nonblock
 		net_nonblock(newSocket);
 
+		{
+			// enable keepalive
+			int opt = 1;
+			setsockopt(newSocket, SOL_SOCKET, SO_KEEPALIVE, (void*)&opt, sizeof(opt));
+#ifdef TCP_KEEPIDLE
+			opt = 30;
+			setsockopt(newSocket, IPPROTO_TCP, TCP_KEEPIDLE, (void*)&opt, sizeof(opt));
+#endif
+#ifdef TCP_KEEPINTVL
+			opt = 1;
+			setsockopt(newSocket, IPPROTO_TCP, TCP_KEEPINTVL, (void*)&opt, sizeof(opt));
+#endif
+#ifdef TCP_KEEPCNT
+			opt = 10;
+			setsockopt(newSocket, IPPROTO_TCP, TCP_KEEPCNT, (void*)&opt, sizeof(opt));
+#endif
+		}
+
 		int is_onion = 0;
 		int is_webirc = 0;
 		{
-- 
2.56.0