From 949aa30befe327c320a3fe2921c1419c6eb556e8 Mon Sep 17 00:00:00 2001
From: Mark Pizzolato <mark@infocomm.com>
Date: Thu, 14 Nov 2013 10:39:17 -0800
Subject: [PATCH] ETHER: Fix bpf filter generation to not generate an invalid
 filter if only multicast addresses were provided

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

diff --git a/sim_ether.c b/sim_ether.c
index d9fed3a2..85d24096 100644
--- a/sim_ether.c
+++ b/sim_ether.c
@@ -3031,6 +3031,11 @@ if ((addr_count > 0) && (dev->reflections > 0)) {
       sprintf(&buf2[strlen(buf2)], "%s(ether src %s)", (*buf2) ? " or " : "", mac);
     }
   sprintf (&buf[strlen(buf)], ")");
+  if (1 == strlen(buf2)) {          /* all addresses were multicast? */
+    buf[strlen(buf)-6] = '\0';      /* Remove "not ()" */
+    if (strlen(buf) > 0)
+        buf[strlen(buf)-5] = '\0';  /* remove " and " */
+    }
   }
 if (strlen(buf) > 0)
   sprintf(&buf[strlen(buf)], ")");