Detect looped-back NDP DAD messages

...as per RFC 7527.

If a looped-back DAD message is received, do not fail DAD since our own
DAD message does not indicate that a neighbor has the address assigned.

Test: ndp_test.TestDADResolveLoopback
PiperOrigin-RevId: 363224288
13 files changed
tree: 459d6d252480a5fb0a7966763e02b1e954a0a80c
  1. pkg/
  2. AUTHORS
  3. go.mod
  4. go.sum
  5. LICENSE