sys/netinet6: Fix SLAAC for interfaces with no /64 LL addressHEADmain

in6_ifadd() asserts that an interface has an existing LL address with a /64
prefix from which to extract the ifid for SLAAC address selection (even though
the comments suggest that an ifid will be generated if one does not exist). This
is adequate for most generic cases, however to support PPP links with /128 LL
addresses we must be able to fall back on another source for the ifid since we
cannot assume the /128 LL has a unique ifid in the lower 64 bits.

To do this, the static function get_ifid() in in6_ifattach.c is renamed to
non-static in6_get_ifid(), and this is used in lieu of a proper /64 LL address
to attempt to obtain a valid ifid.

Reviewed by	kp
Sponsored by:	Rubicon Communications, LLC ("Netgate")
Differential Revision:	https://reviews.freebsd.org/D51778

0 files changed, 0 insertions, 0 deletions