From c65c95bf203ecd80923b5581f97db980d08ab807 Mon Sep 17 00:00:00 2001
From: Kalev Lember <kalevlember@gmail.com>
Date: Mon, 25 Mar 2013 12:47:10 +0100
Subject: Enable TCP keep-alive


diff --git a/tcp.c b/tcp.c
index f4af987..2cca739 100644
--- a/tcp.c
+++ b/tcp.c
@@ -226,6 +226,10 @@ int tcp_connect __P2 (char *,addr, int,port)
 	if (setsockopt(newtcp_fd, SOL_TCP, TCP_NODELAY, &opt, sizeof(opt)))
 	    errmsg("setsockopt(TCP_NODELAY) failed");
 	
+	/* TCP keep-alive */
+	if (setsockopt(newtcp_fd, SOL_SOCKET, SO_KEEPALIVE, &opt, sizeof(opt)))
+	    errmsg("setsockopt(SO_KEEPALIVE) failed");
+
 	/*
 	 * Then, close-on-exec:
 	 * we don't want children to inherit the socket!
-- 
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