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xfrm: set skb control buffer based on packet offload as well

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In packet offload, packets are not encrypted in XFRM stack, so
the next network layer which the packets will be forwarded to
should depend on where the packet came from (either xfrm4_output
or xfrm6_output) rather than the matched SA's family type.

Test: verified IPv6-in-IPv4 packets on Android device with
      IPsec packet offload enabled
Signed-off-by: Mike Yu <yumike@google.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Mike Yu 2024-03-04 12:24:09 +00:00 committed by Steffen Klassert
parent d4872d70fc
commit 8688ab2170
1 changed files with 5 additions and 1 deletions
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6
net/xfrm/xfrm_output.c
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@ -704,9 +704,13 @@ int xfrm_output(struct sock *sk, struct sk_buff *skb)
{
struct net *net = dev_net(skb_dst(skb)->dev);
struct xfrm_state *x = skb_dst(skb)->xfrm;
int family;
int err;
switch (x->outer_mode.family) {
family = (x->xso.type != XFRM_DEV_OFFLOAD_PACKET) ? x->outer_mode.family
: skb_dst(skb)->ops->family;
switch (family) {
case AF_INET:
memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
IPCB(skb)->flags |= IPSKB_XFRM_TRANSFORMED;