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4dfc281702
linux/net
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Florian Westphal 4dfc281702 [Syncookies]: Add support for TCP options via timestamps. 
Allow the use of SACK and window scaling when syncookies are used
and the client supports tcp timestamps. Options are encoded into
the timestamp sent in the syn-ack and restored from the timestamp
echo when the ack is received.

Based on earlier work by Glenn Griffin.
This patch avoids increasing the size of structs by encoding TCP
options into the least significant bits of the timestamp and
by not using any 'timestamp offset'.

The downside is that the timestamp sent in the packet after the synack
will increase by several seconds.

changes since v1:
 don't duplicate timestamp echo decoding function, put it into ipv4/syncookie.c
 and have ipv6/syncookies.c use it.
 Feedback from Glenn Griffin: fix line indented with spaces, kill redundant if ()

Reviewed-by: Hagen Paul Pfeifer <hagen@jauu.net>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-10 03:12:40 -07:00
..
9p Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-04-03 14:33:42 -07:00
802
8021q Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-04-02 22:35:23 -07:00
appletalk [NET] NETNS: Omit net_device->nd_net without CONFIG_NET_NS. 2008-03-26 04:39:53 +09:00
atm [NET] NETNS: Omit sock->sk_net without CONFIG_NET_NS. 2008-03-26 04:39:55 +09:00
ax25 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-03-27 18:48:56 -07:00
bluetooth Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-04-02 22:35:23 -07:00
bridge [NET] NETNS: Omit sock->sk_net without CONFIG_NET_NS. 2008-03-26 04:39:55 +09:00
can [NET] NETNS: Omit net_device->nd_net without CONFIG_NET_NS. 2008-03-26 04:39:53 +09:00
core [SKFILTER]: Add SKF_ADF_NLATTR instruction 2008-04-10 02:02:28 -07:00
dccp [NETNS]: Inet control socket should not hold a namespace. 2008-04-03 14:28:30 -07:00
decnet [NET] NETNS: Omit sock->sk_net without CONFIG_NET_NS. 2008-03-26 04:39:55 +09:00
econet [NET] NETNS: Omit net_device->nd_net without CONFIG_NET_NS. 2008-03-26 04:39:53 +09:00
ethernet
ieee80211 the scheduled ieee80211 softmac removal 2008-03-13 16:02:31 -04:00
ipv4 [Syncookies]: Add support for TCP options via timestamps. 2008-04-10 03:12:40 -07:00
ipv6 [Syncookies]: Add support for TCP options via timestamps. 2008-04-10 03:12:40 -07:00
ipx [NET] NETNS: Omit net_device->nd_net without CONFIG_NET_NS. 2008-03-26 04:39:53 +09:00
irda Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-03-27 18:48:56 -07:00
iucv iucv: Delay bus registration until core is ready. 2008-04-10 02:12:45 -07:00
key Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-03-27 18:48:56 -07:00
lapb
llc Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-04-02 22:35:23 -07:00
mac80211 mac80211: fix key debugfs default_key link 2008-04-08 16:46:36 -04:00
netfilter Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-03-27 18:48:56 -07:00
netlabel [NET] NETNS: Omit net_device->nd_net without CONFIG_NET_NS. 2008-03-26 04:39:53 +09:00
netlink [NET] NETNS: Omit namespace comparision without CONFIG_NET_NS. 2008-03-26 04:40:00 +09:00
netrom [NET] NETNS: Omit sock->sk_net without CONFIG_NET_NS. 2008-03-26 04:39:55 +09:00
packet [NET] NETNS: Omit sock->sk_net without CONFIG_NET_NS. 2008-03-26 04:39:55 +09:00
rfkill
rose Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-04-02 22:35:23 -07:00
rxrpc Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-04-03 14:33:42 -07:00
sched Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-04-02 22:35:23 -07:00
sctp SCTP: Remove useless assignment from __sctp_rcv_lookup_endpoint 2008-04-10 02:00:23 -07:00
sunrpc Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-04-03 14:33:42 -07:00
tipc [TIPC]: Cosmetic cleanup of TIPC polling logic 2008-03-26 16:48:21 -07:00
unix [NET] NETNS: Omit namespace comparision without CONFIG_NET_NS. 2008-03-26 04:40:00 +09:00
wanrouter
wireless cfg80211: default to regulatory max power for channel 2008-04-08 16:44:41 -04:00
x25 [NET] NETNS: Omit sock->sk_net without CONFIG_NET_NS. 2008-03-26 04:39:55 +09:00
xfrm Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-03-27 18:48:56 -07:00
compat.c
Kconfig [IPV4]: Fix size description of CONFIG_INET. 2008-03-04 15:18:22 +09:00
Makefile
nonet.c
socket.c [NETNS]: Introduce a netns_core structure. 2008-03-31 19:41:14 -07:00
sysctl_net.c
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