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Herbert Xu b421995235 [PKT_SCHED]: Add stateless NAT ... Stateless NAT is useful in controlled environments where restrictions are placed on through traffic such that we don't need connection tracking to correctly NAT protocol-specific data. In particular, this is of interest when the number of flows or the number of addresses being NATed is large, or if connection tracking information has to be replicated and where it is not practical to do so. Previously we had stateless NAT functionality which was integrated into the IPv4 routing subsystem. This was a great solution as long as the NAT worked on a subnet to subnet basis such that the number of NAT rules was relatively small. The reason is that for SNAT the routing based system had to perform a linear scan through the rules. If the number of rules is large then major renovations would have take place in the routing subsystem to make this practical. For the time being, the least intrusive way of achieving this is to use the u32 classifier written by Alexey Kuznetsov along with the actions infrastructure implemented by Jamal Hadi Salim. The following patch is an attempt at this problem by creating a new nat action that can be invoked from u32 hash tables which would allow large number of stateless NAT rules that can be used/updated in constant time. The actual NAT code is mostly based on the previous stateless NAT code written by Alexey. In future we might be able to utilise the protocol NAT code from netfilter to improve support for other protocols. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>		18 years ago
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9p	…
802	[NET]: Move hardware header operations out of netdevice.	18 years ago
8021q	[NET]: Move hardware header operations out of netdevice.	18 years ago
appletalk	[NET]: Move hardware header operations out of netdevice.	18 years ago
atm	[ATM] net/atm/lec.c: printk warning fix	18 years ago
ax25	[NET]: Move hardware header operations out of netdevice.	18 years ago
bluetooth	…
bridge	…
core	[NETNS]: Simplify the network namespace list locking rules.	18 years ago
dccp	…
decnet	…
econet	…
ethernet	[NET]: Move hardware header operations out of netdevice.	18 years ago
ieee80211	…
ipv4	[NET]: Move hardware header operations out of netdevice.	18 years ago
ipv6	[NET]: Move hardware header operations out of netdevice.	18 years ago
ipx	…
irda	…
iucv	…
key	…
lapb	…
llc	…
mac80211	[PATCH] mac80211: fix virtual interface locking	18 years ago
netfilter	…
netlabel	…
netlink	…
netrom	[NET]: Move hardware header operations out of netdevice.	18 years ago
packet	[NET]: Move hardware header operations out of netdevice.	18 years ago
rfkill	…
rose	[NET]: Move hardware header operations out of netdevice.	18 years ago
rxrpc	…
sched	[PKT_SCHED]: Add stateless NAT	18 years ago
sctp	…
sunrpc	…
tipc	…
unix	…
wanrouter	…
wireless	[WIRELESS]: Fix Kconfig.	18 years ago
x25	…
xfrm	…
Kconfig	…
Makefile	…
TUNABLE	…
compat.c	…
nonet.c	…
socket.c	…
sysctl_net.c	…