K 10
svn:author
V 7
glebius
K 8
svn:date
V 27
2019-05-24T06:27:11.790677Z
K 7
svn:log
V 838
Merge r344481:
  Support struct ip_mreqn as argument for IP_ADD_MEMBERSHIP. Legacy support
  for struct ip_mreq remains in place.

  The struct ip_mreqn is Linux extension to classic BSD multicast API. It
  has extra field allowing to specify the interface index explicitly. In
  Linux it used as argument for IP_MULTICAST_IF and IP_ADD_MEMBERSHIP.
  FreeBSD kernel also declares this structure and supports it as argument
  to IP_MULTICAST_IF since r170613. So, we have structure declared but
  not fully supported, this confused third party application configure
  scripts.

  Code handling IP_ADD_MEMBERSHIP was mixed together with code for
  IP_ADD_SOURCE_MEMBERSHIP.  Bringing legacy and new structure support
  into the mess would made the "argument switcharoo" intolerable, so
  code was separated into its own switch case clause.

END