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authorLi RongQing <roy.qing.li@gmail.com>2012-12-28 16:07:16 +0800
committerSteffen Klassert <steffen.klassert@secunet.com>2013-01-08 12:41:30 +0100
commit7143dfac692cd25d48a24dbe8323bc17af95b4ec (patch)
treeb7bd65be7b147b50b4c09f9c1523ed7097586750 /net/ipv4/ah4.c
parentipv4: fix NULL checking in devinet_ioctl() (diff)
downloadlinux-dev-7143dfac692cd25d48a24dbe8323bc17af95b4ec.tar.xz
linux-dev-7143dfac692cd25d48a24dbe8323bc17af95b4ec.zip
ah4/esp4: set transport header correctly for IPsec tunnel mode.
IPsec tunnel does not set ECN field to CE in inner header when the ECN field in the outer header is CE, and the ECN field in the inner header is ECT(0) or ECT(1). The cause is ipip_hdr() does not return the correct address of inner header since skb->transport-header is not the inner header after esp_input_done2(), or ah_input(). Signed-off-by: Li RongQing <roy.qing.li@gmail.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/ipv4/ah4.c')
-rw-r--r--net/ipv4/ah4.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c
index a0d8392491c3..a154d0a08c79 100644
--- a/net/ipv4/ah4.c
+++ b/net/ipv4/ah4.c
@@ -269,7 +269,11 @@ static void ah_input_done(struct crypto_async_request *base, int err)
skb->network_header += ah_hlen;
memcpy(skb_network_header(skb), work_iph, ihl);
__skb_pull(skb, ah_hlen + ihl);
- skb_set_transport_header(skb, -ihl);
+
+ if (x->props.mode == XFRM_MODE_TUNNEL)
+ skb_reset_transport_header(skb);
+ else
+ skb_set_transport_header(skb, -ihl);
out:
kfree(AH_SKB_CB(skb)->tmp);
xfrm_input_resume(skb, err);
@@ -381,7 +385,10 @@ static int ah_input(struct xfrm_state *x, struct sk_buff *skb)
skb->network_header += ah_hlen;
memcpy(skb_network_header(skb), work_iph, ihl);
__skb_pull(skb, ah_hlen + ihl);
- skb_set_transport_header(skb, -ihl);
+ if (x->props.mode == XFRM_MODE_TUNNEL)
+ skb_reset_transport_header(skb);
+ else
+ skb_set_transport_header(skb, -ihl);
err = nexthdr;