RPL DIO Multicast message update

Multicast DIO will include allways if rpl_control_set_dio_multicast_min_config_advertisment_count() set 0xff.

Wi-sun Bootstrap set infinite advertisment rule for config advertisment.

Change-Id: Iec2f52b33283729b675e4842b243c9acdd170653

Author: Juha Heiskanen

source/6LoWPAN/ws/ws_config.h

@@ -148,7 +148,7 @@ extern uint8_t DEVICE_MIN_SENS;
  */
 #define WS_MAX_DAO_RETRIES 3 // With 40s, 80s, 160s, 320s, 640s
 #define WS_MAX_DAO_INITIAL_TIMEOUT 400 // With 40s initial value exponentially increasing
-#define WS_MIN_DIO_MULTICAST_CONFIG_ADVERTISMENT_COUNT 10 // Define 10 multicast advertisment when learn config or learn config update
+#define WS_MIN_DIO_MULTICAST_CONFIG_ADVERTISMENT_COUNT 0xff // Advertisment config at every MC DIO
 
 /*
  * Candidate parent list parameters

source/RPL/rpl_structures.h

@@ -87,7 +87,7 @@ struct rpl_dodag {
     bool leaf: 1;                                   /* We are a leaf in this DODAG (by policy) */
     bool have_config: 1;                            /* We have the config */
     bool used: 1;                                   /* We have ever been a member of this DODAG? */
-    uint8_t new_config_advertisment_count;      /* We have advertiment new config at multicasti DIO */
+    uint8_t new_config_advertisment_count;          /* We have advertiment new config at multicasti DIO  max updated value is 0xfe*/
     NS_LIST_HEAD(rpl_dodag_version_t, link) versions; /* List of DODAG versions (newest first) */
     prefix_list_t prefixes;                         /* Prefixes advertised in DIO PIOs */
     rpl_dio_route_list_t routes;                    /* Routes advertised in DIO RIOs*/

source/RPL/rpl_upward.c

@@ -1610,7 +1610,9 @@ void rpl_instance_dio_trigger(rpl_instance_t *instance, protocol_interface_info_
         conf = &dodag->config;
     } else if (dodag->new_config_advertisment_count < rpl_policy_dio_multicast_config_advertisment_min_count()) {
         conf = &dodag->config;
-        dodag->new_config_advertisment_count++;
+        if (dodag->new_config_advertisment_count < 0xfe) {
+            dodag->new_config_advertisment_count++;
+        }
     } else {
         conf = NULL;
     }