From 494d2a3073b3e467d713423cb9b36a4f38fb4c04 Mon Sep 17 00:00:00 2001
From: joxe <joxe>
Date: Thu, 23 Sep 2010 18:17:27 +0000
Subject: [PATCH] only compare with global addresses when selecting source for
 a specific destination

---
 core/net/uip-ds6.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/core/net/uip-ds6.c b/core/net/uip-ds6.c
index 2935c5821..7c069d489 100755
--- a/core/net/uip-ds6.c
+++ b/core/net/uip-ds6.c
@@ -773,7 +773,9 @@ uip_ds6_select_src(uip_ipaddr_t *src, uip_ipaddr_t *dst)
     /* find longest match */
     for(locaddr = uip_ds6_if.addr_list;
         locaddr < uip_ds6_if.addr_list + UIP_DS6_ADDR_NB; locaddr++) {
-      if((locaddr->isused) && (locaddr->state == ADDR_PREFERRED)) {
+      /* Only preferred global (not link-local) addresses */
+      if((locaddr->isused) && (locaddr->state == ADDR_PREFERRED) &&
+         (!uip_is_addr_link_local(&locaddr->ipaddr))) {
         n = get_match_length(dst, &(locaddr->ipaddr));
         if(n >= best) {
           best = n;