From a0d7f1d0418986d0f533adecc5bde8dd6956dcc2 Mon Sep 17 00:00:00 2001
From: Simon Duquennoy <simon.duquennoy@ri.se>
Date: Wed, 25 Apr 2018 01:21:58 -0700
Subject: [PATCH] CoAP: enable reaching link-local endpoints regardless of
 routing reachability

---
 os/net/app-layer/coap/coap-uip.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/os/net/app-layer/coap/coap-uip.c b/os/net/app-layer/coap/coap-uip.c
index 8db2bbbbf..4f2331170 100644
--- a/os/net/app-layer/coap/coap-uip.c
+++ b/os/net/app-layer/coap/coap-uip.c
@@ -49,6 +49,7 @@
 #include "contiki.h"
 #include "net/ipv6/uip-udp-packet.h"
 #include "net/ipv6/uiplib.h"
+#include "net/routing/routing.h"
 #include "coap.h"
 #include "coap-engine.h"
 #include "coap-endpoint.h"
@@ -58,10 +59,6 @@
 #include "coap-keystore.h"
 #include "coap-keystore-simple.h"
 
-#if UIP_CONF_IPV6_RPL
-#include "rpl.h"
-#endif /* UIP_CONF_IPV6_RPL */
-
 /* Log configuration */
 #include "coap-log.h"
 #define LOG_MODULE "coap-uip"
@@ -263,13 +260,12 @@ coap_endpoint_is_secure(const coap_endpoint_t *ep)
 int
 coap_endpoint_is_connected(const coap_endpoint_t *ep)
 {
-#if UIP_CONF_IPV6_RPL
 #ifndef CONTIKI_TARGET_NATIVE
-  if(rpl_get_any_dag() == NULL) {
+  if(!uip_is_addr_linklocal(&ep->ipaddr)
+    && NETSTACK_ROUTING.node_is_reachable() == 0) {
     return 0;
   }
 #endif
-#endif /* UIP_CONF_IPV6_RPL */
 
 #ifdef WITH_DTLS
   if(ep != NULL && ep->secure != 0) {