xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

xfrm: allow to avoid copying DSCP during encapsulation

Browse Source 
By default, DSCP is copying during encapsulation.
Copying the DSCP in IPsec tunneling may be a bit dangerous because packets with
different DSCP may get reordered relative to each other in the network and then
dropped by the remote IPsec GW if the reordering becomes too big compared to the
replay window.

It is possible to avoid this copy with netfilter rules, but it's very convenient
to be able to configure it for each SA directly.

This patch adds a toogle for this purpose. By default, it's not set to maintain
backward compatibility.

Field flags in struct xfrm_usersa_info is full, hence I add a new attribute.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Nicolas Dichtel
2013-02-22 10:54:54 +01:00
committed by Steffen Klassert
parent 6fac411572
commit a947b0a93e
7 changed files with 30 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
net/xfrm/xfrm_state.c
View File

@@ -1187,6 +1187,7 @@ static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp)
goto error;
x->props.flags = orig->props.flags;
x->props.extra_flags = orig->props.extra_flags;
x->curlft.add_time = orig->curlft.add_time;
x->km.state = orig->km.state;