From 409e3e3d5d64f0e87c818e0b938774f7805994c2 Mon Sep 17 00:00:00 2001 From: Florin Coras Date: Thu, 10 Apr 2025 23:55:26 -0400 Subject: [PATCH] tcp: do not scale syn-ack window Type: fix Change-Id: I1d677a8d80065644a1ddfb3884d99feee04c4756 Signed-off-by: Florin Coras --- src/vnet/tcp/tcp_input.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/vnet/tcp/tcp_input.c b/src/vnet/tcp/tcp_input.c index 15b2c92dcf1..2d43cf0f01f 100644 --- a/src/vnet/tcp/tcp_input.c +++ b/src/vnet/tcp/tcp_input.c @@ -1883,8 +1883,8 @@ tcp46_syn_sent_inline (vlib_main_t *vm, vlib_node_runtime_t *node, else new_tc->rcv_wscale = 0; - new_tc->snd_wnd = clib_net_to_host_u16 (tcp->window) - << new_tc->snd_wscale; + /* RFC7323 sec 2.2: Window field in a syn segment must not be scaled */ + new_tc->snd_wnd = clib_net_to_host_u16 (tcp->window); new_tc->snd_wl1 = seq; new_tc->snd_wl2 = ack; -- 2.16.6