andre b79d63c178 Introduce tcp_hostcache and remove the tcp specific metrics from
the routing table.  Move all usage and references in the tcp stack
from the routing table metrics to the tcp hostcache.

It caches measured parameters of past tcp sessions to provide better
initial start values for following connections from or to the same
source or destination.  Depending on the network parameters to/from
the remote host this can lead to significant speedups for new tcp
connections after the first one because they inherit and shortcut
the learning curve.

tcp_hostcache is designed for multiple concurrent access in SMP
environments with high contention and is hash indexed by remote
ip address.

It removes significant locking requirements from the tcp stack with
regard to the routing table.

Reviewed by:	sam (mentor), bms
Reviewed by:	-net, -current, core@kame.net (IPv6 parts)
Approved by:	re (scottl)
2003-11-20 21:47:20 +00:00
..
2003-10-12 11:08:18 +00:00
2003-10-13 04:56:04 +00:00
2003-10-13 04:56:04 +00:00
2003-10-12 12:03:25 +00:00
2003-10-12 15:14:33 +00:00
2003-11-11 18:58:54 +00:00
2003-10-13 14:57:41 +00:00
2003-10-29 15:07:04 +00:00
2003-10-08 18:26:08 +00:00
2003-10-29 15:07:04 +00:00
2003-10-08 18:26:08 +00:00
2003-10-31 16:06:05 +00:00
2003-10-06 14:02:09 +00:00
2003-10-29 15:07:04 +00:00
2003-10-08 18:26:08 +00:00
2003-10-08 18:26:08 +00:00
2003-10-09 18:44:54 +00:00
2003-11-04 16:02:05 +00:00
2003-10-31 16:07:15 +00:00
2003-10-31 16:07:15 +00:00
2003-11-04 16:02:05 +00:00
2003-10-31 16:06:05 +00:00
2003-10-29 12:49:12 +00:00
2003-10-22 15:13:36 +00:00

a note to committers about KAME tree
$FreeBSD$
KAME project


FreeBSD IPv6/IPsec tree is from KAMEproject (http://www.kame.net/).
To synchronize KAME tree and FreeBSD better today and in the future,
please understand the following:

- DO NOT MAKE COSTMETIC CHANGES.
  "Cosmetic changes" here includes tabify, untabify, removal of space at EOL,
  minor KNF items, and whatever adds more output lines on "diff freebsd kame".
  To make future synchronization easier. it is critical to preserve certain
  statements in the code.  Also, as KAME tree supports all 4 BSDs (Free, Open,
  Net, BSD/OS) in single shared tree, it is not always possible to backport
  FreeBSD changes into KAME tree.  So again, please do not make cosmetic
  changes.  Even if you think it a right thing, that will bite KAME guys badly
  during upgrade attempts, and prevent us from synchronizing two trees.
  (you don't usually make cosmetic changes against third-party code, do you?)

- REPORT CHANGES/BUGS TO KAME GUYS.
  It is not always possible for KAME guys to watch all the freebsd mailing
  list traffic, as the traffic is HUGE.  So if possible, please, inform
  kame guys of changes you made in IPv6/IPsec related portion.  Contact
  path would be snap-users@kame.net or KAME PR database on www.kame.net.
  (or to core@kame.net if it is necessary to make it confidential)

Thank you for your cooperation and have a happy IPv6 life!


Note: KAME-origin code is in the following locations.
The above notice applies to corresponding manpages too.
The list may not be complete.  If you see $KAME$ in the code, it is from
KAME distribution.  If you see some file that is IPv6/IPsec related, it is
highly possible that the file is from KAME distribution.

include/ifaddrs.h
lib/libc/net
lib/libc/net/getaddrinfo.c
lib/libc/net/getifaddrs.c
lib/libc/net/getnameinfo.c
lib/libc/net/ifname.c
lib/libc/net/ip6opt.c
lib/libc/net/map_v4v6.c
lib/libc/net/name6.c
lib/libftpio
lib/libipsec
sbin/ip6fw
sbin/ping6
sbin/rtsol
share/doc/IPv6
share/man/man4/ip6.4
share/man/man4/inet6.4
sys/crypto (except sys/crypto/rc4)
sys/kern/uipc_mbuf2.c
sys/net/if_faith.[ch]
sys/net/if_gif.[ch]
sys/net/if_stf.[ch]
sys/net/pfkeyv2.h
sys/netinet/icmp6.h
sys/netinet/in_gif.[ch]
sys/netinet/ip6.h
sys/netinet/ip_encap.[ch]
sys/netinet6
sys/netkey
usr.sbin/faithd
usr.sbin/gifconfig
usr.sbin/ifmcstat
usr.sbin/mld6query
usr.sbin/ndp
usr.sbin/pim6dd
usr.sbin/pim6sd
usr.sbin/prefix
usr.sbin/rip6query
usr.sbin/route6d
usr.sbin/rrenumd
usr.sbin/rtadvd
usr.sbin/rtsold
usr.sbin/scope6config
usr.sbin/setkey
usr.sbin/traceroute6