We observe at least one problem: if a UDP socket is connect-ed, then a
received packet that matches the connection cannot be matched to the
corresponding PCB because of an incorrect flow ID. That was oberved for DNS
requests from the libc resolver. We got this problem because FreeBSD
r343291 enabled code that can set rsstype of received packets to values
other than M_HASHTYPE_OPAQUE_HASH. Earlier that code was under 'ifdef
notyet'. The commit message did not provide any rationale.
The essence of this change is to use the system-wide RSS key instead of some
historic hardcoded key.
Sponsored by Panzura.