# HG changeset patch
# User Kim Alvefur <zash@zash.se>
# Date 1626293379 -7200
# Node ID 153d2fdd97d3a52aee33c99b637fa3e45561b7b0
# Parent  f4c3dcc907d84210bbe7129ac20c44bdbab7c429
net.server_epoll: Add way to enable TCP keeplives on all connections

In case one wishes to enable this for all connections, not just c2s
(not Direct TLS ones, because LuaSec) and s2s. Unclear what use these
are, since they kick in after 2 hours of idle time.

diff -r f4c3dcc907d8 -r 153d2fdd97d3 net/server_epoll.lua
--- a/net/server_epoll.lua	Wed Jul 14 22:06:24 2021 +0200
+++ b/net/server_epoll.lua	Wed Jul 14 22:09:39 2021 +0200
@@ -80,6 +80,9 @@
 
 	-- Attempt writes instantly
 	opportunistic_writes = false;
+
+	-- TCP Keepalives
+	tcp_keepalive = false; -- boolean | number
 }};
 local cfg = default_config.__index;
 
@@ -727,8 +730,10 @@
 	return self:add(true, true);
 end
 
--- luacheck: ignore 212/self
 function interface:defaultoptions()
+	if cfg.tcp_keepalive then
+		self:setoption("keepalive", true);
+	end
 end
 
 function interface:pause()