Merge pull request #5252 from ARMmbed/6lowpan-enable-MPL

Enable MPL by default for 6LoWPAN-ND.

Author: theotherjimmy

features/nanostack/FEATURE_NANOSTACK/mbed-mesh-api/source/nd_tasklet.c

@@ -23,6 +23,7 @@
 #include "include/nd_tasklet.h"
 #include "include/mesh_system.h"
 #include "ns_event_loop.h"
+#include "multicast_api.h"
 
 // For tracing we need to define flag, have include and define group
 #define HAVE_DEBUG 1
@@ -265,6 +266,13 @@ void nd_tasklet_configure_and_connect_to_network(void)
          tasklet_data_ptr->network_interface_id,
          MBED_CONF_MBED_MESH_API_6LOWPAN_ND_PANID_FILTER);
 
+    // Enable MPL by default
+    const uint8_t all_mpl_forwarders[16] = {0xff, 0x03, [15]=0xfc};
+    multicast_mpl_domain_subscribe(tasklet_data_ptr->network_interface_id,
+                                      all_mpl_forwarders,
+                                      MULTICAST_MPL_SEED_ID_DEFAULT,
+                                      NULL);
+
     status = arm_nwk_interface_up(tasklet_data_ptr->network_interface_id);
     if (status >= 0) {
         tasklet_data_ptr->tasklet_state = TASKLET_STATE_BOOTSTRAP_STARTED;