From 3b39c2b3e207c5a1555a68481a213a79bd92f188 Mon Sep 17 00:00:00 2001
From: stsp <stsp@openbsd.org>
Date: Thu, 7 Oct 2021 12:26:09 +0000
Subject: [PATCH] Send a probe request to our new AP when we are about to roam
 to it.

Tested by fkr on iwx ax200/ax201 and myself on iwm 8265.
Also tested by florian and bket as part of a larger diff.

ok mpi@
---
 sys/net80211/ieee80211_node.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/sys/net80211/ieee80211_node.c b/sys/net80211/ieee80211_node.c
index 213ef3fc1c9..e6bc96875d3 100644
--- a/sys/net80211/ieee80211_node.c
+++ b/sys/net80211/ieee80211_node.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ieee80211_node.c,v 1.185 2021/04/29 21:43:47 stsp Exp $	*/
+/*	$OpenBSD: ieee80211_node.c,v 1.186 2021/10/07 12:26:09 stsp Exp $	*/
 /*	$NetBSD: ieee80211_node.c,v 1.14 2004/05/09 09:18:47 dyoung Exp $	*/
 
 /*-
@@ -1268,6 +1268,15 @@ ieee80211_node_join_bss(struct ieee80211com *ic, struct ieee80211_node *selbs)
 
 		/* 
 		 * After a background scan, we have now switched APs.
+		 * Send a probe request to our new AP to say "Hello!".
+		 * This is not strictly required but could help with
+		 * setting up state in our new AP.
+		 */
+		if (bgscan) {
+			IEEE80211_SEND_MGMT(ic, ni,
+			    IEEE80211_FC0_SUBTYPE_PROBE_REQ, 0);
+		}
+		/*
 		 * Pretend we were just de-authed, which makes
 		 * ieee80211_new_state() try to re-auth and thus send
 		 * an AUTH frame to our newly selected AP.
-- 
2.20.1