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Differential D40141

rc.d/netif: Don't DAD if lo0 is the only IPv6 IF
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Authored by cperciva on May 18 2023, 3:22 AM.
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rGdc5361ea16bf: rc.d/netif: Don't DAD if lo0 is the only IPv6 IF
Summary

The code in rc.d/netif waiting for IPv6 Duplicate Address Detection if
any network interfaces support IPv6. Unfortunately, since lo0 *always*
has IPv6 enabled, this means unconditionally sleeping, even on systems
which have no external IPv6 interfaces.

Since we presume that there is little risk of a duplicate address being
assigned on lo0, amend the test to wait only if there is an interface
*other than lo0* which supports IPv6.

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rG FreeBSD src repository
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Buildable 51533
Build 48424: arc lint + arc unit

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libexec/
rc/
rc.d/
2 lines

Diff 122063

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libexec/rc/rc.d/netif

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