*
* The IP header and mutable extension headers will be moved forward to make
* space for the encapsulation header.
- *
- * On exit, skb->h will be set to the start of the encapsulation header to be
- * filled in by x->type->output and the mac header 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 and the network header will always point to the
- * top IP header.
*/
static int xfrm6_transport_output(struct xfrm_state *x, struct sk_buff *skb)
{
u8 *prevhdr;
int hdr_len;
- skb_push(skb, x->props.header_len);
iph = ipv6_hdr(skb);
hdr_len = x->type->hdr_offset(x, skb, &prevhdr);
skb_set_mac_header(skb, (prevhdr - x->props.header_len) - skb->data);
- skb_reset_network_header(skb);
- skb_set_transport_header(skb, hdr_len);
- memmove(skb->data, iph, hdr_len);
+ skb_set_network_header(skb, -x->props.header_len);
+ skb->transport_header = skb->network_header + hdr_len;
+ __skb_pull(skb, hdr_len);
+ memmove(ipv6_hdr(skb), iph, hdr_len);
return 0;
}