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path: root/net/ipv6/xfrm6_mode_tunnel.c
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Diffstat (limited to 'net/ipv6/xfrm6_mode_tunnel.c')
-rw-r--r--net/ipv6/xfrm6_mode_tunnel.c18
1 files changed, 5 insertions, 13 deletions
diff --git a/net/ipv6/xfrm6_mode_tunnel.c b/net/ipv6/xfrm6_mode_tunnel.c
index 9fc95bc6509..ea228387911 100644
--- a/net/ipv6/xfrm6_mode_tunnel.c
+++ b/net/ipv6/xfrm6_mode_tunnel.c
@@ -33,15 +33,7 @@ static inline void ip6ip_ecn_decapsulate(struct sk_buff *skb)
/* Add encapsulation header.
*
- * The top IP header will be constructed per RFC 2401. The following fields
- * in it shall be filled in by x->type->output:
- * payload_len
- *
- * On exit, skb->h will be set to the start of the encapsulation header to be
- * filled in by x->type->output and skb->nh will be set to the nextheader field
- * of the extension header directly preceding the encapsulation header, or in
- * its absence, that of the top IP header. The value of skb->data will always
- * point to the top IP header.
+ * The top IP header will be constructed per RFC 2401.
*/
static int xfrm6_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
{
@@ -50,13 +42,13 @@ static int xfrm6_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
struct ipv6hdr *iph, *top_iph;
int dsfield;
- skb_push(skb, x->props.header_len);
iph = ipv6_hdr(skb);
- skb_reset_network_header(skb);
+ skb_set_network_header(skb, -x->props.header_len);
+ skb->mac_header = skb->network_header +
+ offsetof(struct ipv6hdr, nexthdr);
+ skb->transport_header = skb->network_header + sizeof(*iph);
top_iph = ipv6_hdr(skb);
- skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
- skb->network_header += offsetof(struct ipv6hdr, nexthdr);
top_iph->version = 6;
if (xdst->route->ops->family == AF_INET6) {