Page MenuHomeFreeBSD

rc.d/netif: Don't DAD if lo0 is the only IPv6 IF
ClosedPublic

Authored by cperciva on May 18 2023, 3:22 AM.
Tags
None
Referenced Files
Unknown Object (File)
Sat, Oct 11, 8:38 PM
Unknown Object (File)
Fri, Oct 10, 3:33 PM
Unknown Object (File)
Tue, Sep 30, 6:42 PM
Unknown Object (File)
Mon, Sep 29, 9:27 PM
Unknown Object (File)
Mon, Sep 29, 4:11 PM
Unknown Object (File)
Mon, Sep 29, 2:22 PM
Unknown Object (File)
Tue, Sep 23, 11:35 AM
Unknown Object (File)
Sun, Sep 14, 3:30 PM
Subscribers

Details

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.

Diff Detail

Repository
rG FreeBSD src repository
Lint
Lint Not Applicable
Unit
Tests Not Applicable