From f323745ead5c9cb18f552c6df62296bb9bc19be3 Mon Sep 17 00:00:00 2001
From: Oliver Jowett <oliver@mutability.co.uk>
Date: Fri, 23 Feb 2018 18:10:26 +0000
Subject: [PATCH] Don't track icao 000000 as an aircraft (but do still decode
 messages for it)

---
 track.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/track.c b/track.c
index 9fa626a..b550e97 100644
--- a/track.c
+++ b/track.c
@@ -814,6 +814,11 @@ struct aircraft *trackUpdateFromMessage(struct modesMessage *mm)
         return NULL;
     }
 
+    if (mm->addr == 0) {
+        // junk address, don't track it
+        return NULL;
+    }
+
     _messageNow = mm->sysTimestampMsg;
 
     // Lookup our aircraft or create a new one