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authorPatrick McHardy <kaber@trash.net>2007-06-18 22:30:15 -0700
committerDavid S. Miller <davem@davemloft.net>2007-06-18 22:30:15 -0700
commit281216177a407f78cfd650ee4391afc487577193 (patch)
tree47325468a011757f3c4169e83d3172b744b5c9e5 /net
parentfa490cfd15d7ce0900097cc4e60cfd7a76381138 (diff)
downloadlinux-281216177a407f78cfd650ee4391afc487577193.tar.bz2
[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 <pupilla@hotmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/xfrm/xfrm_state.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 85f3f43a6cca..dfacb9c2a6e3 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;
}