Add truncation detection to vmd's instruction decoder.
vmd(8) ultimately needs a way to deal with instructions that cross
page boundaries. This is a baby step to get there by fixing up the
decoder logic to detect when we're out of fetched instruction bytes
but not done decoding an instruction. Next steps will be to add in
cross-page fetching and injecting #PF if the next page is paged out
and we weren't able to decode with just the bytes from the first page.
These state machine changes uncovered some issues with 16-bit
addressing and decoding that got fixed along the way.
ok mlarkin@
In pf(4) check extension header length.
pf_walk_header6() advances the packet offset for each IPv6 extension
header. It was not checked that this does not exceed the packet
length if no next header was processed. When used with af-to rules,
this could trigger a panic: m_copydata: null mbuf.
from Acts1631; OK henning@ sashan@
import ports/devel/py-vcs-versioning, ok tb
vcs-versioning provides core VCS versioning functionality, originally
part of setuptools-scm, but extracted as a standalone library that can
be used independently.
