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ok millert@ deraadt@
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PR1186 from "Robert Mooney" <rjmooney@atl.mediaone.net>.
(printf format change is not bringed in - i'm unsure about it)
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replaces NRL IPv6 layer. reuses NRL pcb layer. no IPsec-on-v6 support.
see sys/netinet6/{TODO,IMPLEMENTATION} for more details.
GENERIC configuration should work fine as before. GENERIC.v6 works fine
as well, but you'll need KAME userland tools to play with IPv6 (will be
bringed into soon).
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protocols.
"struct tcpiphdr" is now gone from much of the code, as are separate pointers
for ti and ti6. The result is fewer variables, which is generally a good thing.
Simple if(is_ipv6) ... else ... tests are gone in favor of a
switch(protocol family), which allows future new protocols to be added easily.
This also makes it possible for someone so inclined to re-implement TUBA (TCP
over CLNP?) and do it right instead of the kluged way it was done in 4.4.
The TCP header template is now referenced through a mbuf rather than done
through a data pointer and dtom()ed as needed. This is partly because dtom() is
evil and partly because max_linkhdr + IPv6 + TCP + MSS/TS/SACK opts won't fit
inside a packet header mbuf, so we need to grab a cluster for that (which the
code now does, if needed).
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by Hari Balakrishnan (hari@lcs.mit.edu), Tom Henderson (tomh@cs.berkeley.edu)
and Venkat Padmanabhan (padmanab@cs.berkeley.edu) as part of the
Daedalus research group at the University of California,
(http://daedalus.cs.berkeley.edu). [I was able to do this on time spent
at the Center for Information Technology Integration (citi.umich.edu)]
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