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Loop detection via DAO: if we get a DAO from a parent, that parent thinks we are its parent. We poison it and recalulate our parents.

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Adam Dunkels 2013-08-12 00:11:09 +02:00 committed by Simon Duquennoy
parent 34119b7ef2
commit e5a6565137
1 changed files with 8 additions and 0 deletions
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8
core/net/rpl/rpl-icmp6.c
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@ -698,6 +698,14 @@ dao_input(void)
p->updated = 1; p->updated = 1;
return; return;
} }
/* If we get the DAO from our parent, we also have a loop. */
if(p != NULL && p == dag->preferred_parent) {
PRINTF("RPL: Loop detected when receiving a unicast DAO from our parent\n");
p->rank = INFINITE_RANK;
p->updated = 1;
return;
}
} }
PRINTF("RPL: adding DAO route\n"); PRINTF("RPL: adding DAO route\n");