From 7b5fc163dc9bdc74facc238127b6f0440395fc3c Mon Sep 17 00:00:00 2001
From: wb2osz <wb2osz@comcast.net>
Date: Sun, 17 Feb 2019 21:11:40 -0500
Subject: [PATCH] More error checking.

---
 ax25_pad.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/ax25_pad.c b/ax25_pad.c
index e584d0b..036665b 100644
--- a/ax25_pad.c
+++ b/ax25_pad.c
@@ -1295,7 +1295,11 @@ void ax25_get_addr_with_ssid (packet_t this_p, int n, char *station)
 	station[6] = '\0';
 
 	for (i=5; i>=0; i--) {
-	  if (station[i] == ' ')
+	  if (station[i] == '\0') {
+	    text_color_set(DW_COLOR_ERROR);
+	    dw_printf ("Station address \"%s\" contains nul character.  AX.25 protocol requires trailing ASCII spaces when less than 6 characters.\n", station);
+	  }
+	  else if (station[i] == ' ')
 	    station[i] = '\0';
 	  else
 	    break;