From f6a4ae6042f4bb2b6db8eda23df31d8b788a7978 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Jacke?= <bjacke@samba.org>
Date: Thu, 18 Feb 2021 11:58:52 +0100
Subject: [PATCH] client: set IPTOS_LOWDELAY on TCP connection

this helps edge routers to prioritize our interactive network traffic.
---
 tmate-ssh-client.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tmate-ssh-client.c b/tmate-ssh-client.c
index 995c92a7..ce8d5a5a 100644
--- a/tmate-ssh-client.c
+++ b/tmate-ssh-client.c
@@ -183,6 +183,7 @@ static void tune_socket_opts(int fd)
 	}										\
 })
 
+	SSO(IPPROTO_IP, IP_TOS, 0x10); /* IPTOS_LOWDELAY */
 	SSO(IPPROTO_TCP, TCP_NODELAY, 1);
 	SSO(SOL_SOCKET, SO_KEEPALIVE, 1);
 #ifdef TCP_KEEPALIVE