Merge pull request #9073 from miri64/gnrc_rpl/fix/ft-del

gnrc_rpl: remove route before updating it

sys/net/gnrc/routing/rpl/gnrc_rpl_control_messages.c

@@ -467,6 +467,7 @@ bool _parse_options(int msg_type, gnrc_rpl_instance_t *inst, gnrc_rpl_opt_t *opt
                       ipv6_addr_to_str(addr_str, &(target->target), (unsigned)sizeof(addr_str)),
                       target->prefix_length);
 
+                gnrc_ipv6_nib_ft_del(&(target->target), target->prefix_length);
                 gnrc_ipv6_nib_ft_add(&(target->target), target->prefix_length, src,
                                      dodag->iface,
                                      dodag->default_lifetime * dodag->lifetime_unit);
@@ -487,6 +488,8 @@ bool _parse_options(int msg_type, gnrc_rpl_instance_t *inst, gnrc_rpl_opt_t *opt
                           ipv6_addr_to_str(addr_str, &(first_target->target), sizeof(addr_str)),
                           first_target->prefix_length);
 
+                    gnrc_ipv6_nib_ft_del(&(first_target->target),
+                                         first_target->prefix_length);
                     gnrc_ipv6_nib_ft_add(&(first_target->target),
                                          first_target->prefix_length, src,
                                          dodag->iface,

sys/net/gnrc/routing/rpl/gnrc_rpl_dodag.c

@@ -258,6 +258,7 @@ void gnrc_rpl_parent_update(gnrc_rpl_dodag_t *dodag, gnrc_rpl_parent_t *parent)
         if (dodag->instance->mop != GNRC_RPL_P2P_MOP) {
 #endif
         if (parent == dodag->parents) {
+            gnrc_ipv6_nib_ft_del(NULL, 0);
             gnrc_ipv6_nib_ft_add(NULL, 0, &parent->addr, dodag->iface,
                                  dodag->default_lifetime * dodag->lifetime_unit);
         }
@@ -308,6 +309,7 @@ static gnrc_rpl_parent_t *_gnrc_rpl_find_preferred_parent(gnrc_rpl_dodag_t *doda
 #ifdef MODULE_GNRC_RPL_P2P
     if (dodag->instance->mop != GNRC_RPL_P2P_MOP) {
 #endif
+        gnrc_ipv6_nib_ft_del(NULL, 0);
         gnrc_ipv6_nib_ft_add(NULL, 0, &dodag->parents->addr, dodag->iface,
                              dodag->default_lifetime * dodag->lifetime_unit);
 #ifdef MODULE_GNRC_RPL_P2P