Fix: ignore loopback NA during IPv6 DAD (RFC 4862, 5.4.3) #60
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- add edge case for loopback NA during IPv6 DAD Operation
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This PR addresses an edge case in Duplicate Address Detection (DAD)
where a node receives its own Neighbor Advertisement (NA) message
(broadcast via ff02::1) and mistakenly considers it as evidence of
address duplication, resulting in the unintended removal of its
link-local address.
According to RFC 4862 Section 5.4.3, such loopbacked messages must
not be interpreted as a sign of address duplication.
This patch adds a check to ensure that the source address of the
incoming NA does not match the node’s own address