K 10
svn:author
V 6
brooks
K 8
svn:date
V 27
2018-03-30T21:38:53.634474Z
K 7
svn:log
V 586
Document and enforce assumptions about struct (in6_)ifreq.

- The two types must be type-punnable for shared members of ifr_ifru.
  This allows compatibility accessors to be shared.

- There must be no padding gap between ifr_name and ifr_ifru.  This is
  assumed in tcpdump's use of SIOCGIFFLAGS output which attempts to be
  broadly portable.  This is true for all current architectures, but very
  large (256-bit) fat-pointers could violate this invariant.

Reviewed by:	kib
Obtained from:	CheriBSD
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D14910

END