[PATCH v2] Send CTRL-EVENT-SIGNAL-CHANGE message to control interfaces only

[Kan-Ru Chen]

The default logging level for the CTRL-EVENT-SIGNAL-CHANGE message
may be repeated many times and fill the log file or journal.

For example https://bugzilla.redhat.com/show_bug.cgi?id=2309148 and
the first few results from searching CTRL-EVENT-SIGNAL-CHANGE on the
web contain various complaints and workarounds.

Change the logging method to wpa_msg_ctrl to avoid sending frequent
messages to the syslog but still allow the message to be consumed by
control interface monitors.

Signed-off-by: Kan-Ru Chen <kanru at kanru.info>
---
 wpa_supplicant/events.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wpa_supplicant/events.c b/wpa_supplicant/events.c
index 5a1bc6d58..0a702ccc6 100644
--- a/wpa_supplicant/events.c
+++ b/wpa_supplicant/events.c
@@ -6766,7 +6766,7 @@ void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
 					data->eapol_rx.encrypted);
 		break;
 	case EVENT_SIGNAL_CHANGE:
-		wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SIGNAL_CHANGE
+		wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SIGNAL_CHANGE
 			"above=%d signal=%d noise=%d txrate=%lu",
 			data->signal_change.above_threshold,
 			data->signal_change.data.signal,
-- 
2.47.1