[XFRM]: Fix MTU calculation for non-ESP SAs
My IPsec MTU optimization patch introduced a regression in MTU calculation
for non-ESP SAs, the SA's header_len needs to be subtracted from the MTU if
the transform doesn't provide a ->get_mtu() function.
Reported-and-tested-by: Marco Berizzi <[EMAIL PROTECTED]>
Signed-off-by: Patrick McHardy <[EMAIL PROTECTED]>
---
commit b31d763b8a6b9a6eba5b5805f81ae605ebeab475
tree 6beec3612b419286bf9d7c7b98551ee30172da01
parent 188e1f81ba31af1b65a2f3611df4c670b092bbac
author Patrick McHardy <[EMAIL PROTECTED]> Mon, 18 Jun 2007 17:57:09 +0200
committer Patrick McHardy <[EMAIL PROTECTED]> Mon, 18 Jun 2007 17:57:09 +0200
net/xfrm/xfrm_state.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 85f3f43..dfacb9c 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -1729,7 +1729,7 @@ int xfrm_state_mtu(struct xfrm_state *x, int mtu)
x->type && x->type->get_mtu)
res = x->type->get_mtu(x, mtu);
else
- res = mtu;
+ res = mtu - x->props.header_len;
spin_unlock_bh(&x->lock);
return res;
}
