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authorSteffen Klassert <steffen.klassert@secunet.com>2013-02-05 12:52:55 +0100
committerSteffen Klassert <steffen.klassert@secunet.com>2013-02-06 08:31:10 +0100
commita0073fe18e718a1c815fe8b0120f1ac3c60284ba (patch)
tree1f30d5f9415a90c5662376fd3e4c0420a431b9f1 /include/net/xfrm.h
parentfa8599db8f222fd9d351a640074377a841979187 (diff)
downloadlinux-a0073fe18e718a1c815fe8b0120f1ac3c60284ba.tar.gz
xfrm: Add a state resolution packet queue
As the default, we blackhole packets until the key manager resolves the states. This patch implements a packet queue where IPsec packets are queued until the states are resolved. We generate a dummy xfrm bundle, the output routine of the returned route enqueues the packet to a per policy queue and arms a timer that checks for state resolution when dst_output() is called. Once the states are resolved, the packets are sent out of the queue. If the states are not resolved after some time, the queue is flushed. This patch keeps the defaut behaviour to blackhole packets as long as we have no states. To enable the packet queue the sysctl xfrm_larval_drop must be switched off. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'include/net/xfrm.h')
-rw-r--r--include/net/xfrm.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 814a1baa175..30f3e5b362e 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -501,6 +501,12 @@ struct xfrm_policy_walk {
u32 seq;
};
+struct xfrm_policy_queue {
+ struct sk_buff_head hold_queue;
+ struct timer_list hold_timer;
+ unsigned long timeout;
+};
+
struct xfrm_policy {
#ifdef CONFIG_NET_NS
struct net *xp_net;
@@ -522,6 +528,7 @@ struct xfrm_policy {
struct xfrm_lifetime_cfg lft;
struct xfrm_lifetime_cur curlft;
struct xfrm_policy_walk_entry walk;
+ struct xfrm_policy_queue polq;
u8 type;
u8 action;
u8 flags;