linux/net/xfrm
David S. Miller 14e50e57ae [XFRM]: Allow packet drops during larval state resolution.
The current IPSEC rule resolution behavior we have does not work for a
lot of people, even though technically it's an improvement from the
-EAGAIN buisness we had before.

Right now we'll block until the key manager resolves the route.  That
works for simple cases, but many folks would rather packets get
silently dropped until the key manager resolves the IPSEC rules.

We can't tell these folks to "set the socket non-blocking" because
they don't have control over the non-block setting of things like the
sockets used to resolve DNS deep inside of the resolver libraries in
libc.

With that in mind I coded up the patch below with some help from
Herbert Xu which provides packet-drop behavior during larval state
resolution, controllable via sysctl and off by default.

This lays the framework to either:

1) Make this default at some point or...

2) Move this logic into xfrm{4,6}_policy.c and implement the
   ARP-like resolution queue we've all been dreaming of.
   The idea would be to queue packets to the policy, then
   once the larval state is resolved by the key manager we
   re-resolve the route and push the packets out.  The
   packets would timeout if the rule didn't get resolved
   in a certain amount of time.

Signed-off-by: David S. Miller <davem@davemloft.net>
2007-05-24 18:17:54 -07:00
..
Kconfig [PFKEYV2]: CONFIG_NET_KEY_MIGRATE option 2007-02-08 13:15:05 -08:00
Makefile [XFRM]: Extract common hashing code into xfrm_hash.[ch] 2006-09-22 15:08:49 -07:00
xfrm_algo.c [IPSEC]: Fix warnings with casting int to pointer 2007-05-22 16:12:26 -07:00
xfrm_hash.c [IPSEC]: Don't warn if high-order hash resize fails 2007-05-14 02:19:11 -07:00
xfrm_hash.h [XFRM] STATE: Use destination address for src hash. 2006-10-04 00:31:02 -07:00
xfrm_input.c [SK_BUFF]: Introduce skb_transport_header(skb) 2007-04-25 22:25:31 -07:00
xfrm_policy.c [XFRM]: Allow packet drops during larval state resolution. 2007-05-24 18:17:54 -07:00
xfrm_state.c [XFRM] SAD info TLV aggregationx 2007-05-04 12:55:13 -07:00
xfrm_user.c [XFRM] SPD info TLV aggregation 2007-05-04 12:55:39 -07:00