From 289566afe84978f5452ee30946bd8d37899fb971 Mon Sep 17 00:00:00 2001
From: Ivan Delamer <delamer@inicotech.com>
Date: Fri, 4 May 2012 18:25:22 -0600
Subject: [PATCH] In ip6_input(), do not accept link-local packets on netifs
 other than inp.

Change-Id: I7f3c779e69292bc078890e0acdc37112559644ce
---
 src/core/ipv6/ip6.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/core/ipv6/ip6.c b/src/core/ipv6/ip6.c
index feed8c14..6a8cafe0 100644
--- a/src/core/ipv6/ip6.c
+++ b/src/core/ipv6/ip6.c
@@ -447,6 +447,11 @@ ip6_input(struct pbuf *p, struct netif *inp)
           }
         }
       }
+      if (ip6_addr_islinklocal(ip6_current_dest_addr())) {
+        /* Do not match link-local addresses to other netifs. */
+        netif = NULL;
+        break;
+      }
       if (first) {
         first = 0;
         netif = netif_list;
@@ -459,7 +464,7 @@ ip6_input(struct pbuf *p, struct netif *inp)
     } while(netif != NULL);
 netif_found:
     LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: packet accepted on interface %c%c\n",
-        netif->name[0], netif->name[1]));
+        netif ? netif->name[0] : 'X', netif? netif->name[1] : 'X'));
   }
 
   /* "::" packet source address? (used in duplicate address detection) */