From f298c74c44b4eaf06fde76c21d147a5a20991f8e Mon Sep 17 00:00:00 2001
From: mlenders <mlenders@inf.fu-berlin.de>
Date: Sat, 9 Jul 2011 19:08:27 +0200
Subject: [PATCH] [sys/net/sixlowpan/sixlowip.c] * avoid duplicate attachement
 of IPv6 addresses to the interface

---
 sys/net/sixlowpan/sixlowip.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sys/net/sixlowpan/sixlowip.c b/sys/net/sixlowpan/sixlowip.c
index 7e027c9e38..324712b438 100644
--- a/sys/net/sixlowpan/sixlowip.c
+++ b/sys/net/sixlowpan/sixlowip.c
@@ -129,6 +129,9 @@ void ipv6_iface_add_addr(ipv6_addr_t *addr, uint8_t state, uint32_t val_ltime,
         printf("ERROR: unspecified address (::) can't be assigned to interface.\n");
         return;
     }
+    if(ipv6_iface_addr_match(addr) != 0) {
+        return;
+    }
     if(iface_addr_list_count < IFACE_ADDR_LIST_LEN){
         memcpy(&(iface.addr_list[iface_addr_list_count].addr.uint8[0]), 
                &(addr->uint8[0]), 16);