- if (x->props.mode) {
- iph = skb->nh.ipv6h;
- top_iph = (struct ipv6hdr*)skb_push(skb, x->props.header_len);
- esph = (struct ipv6_esp_hdr*)(top_iph+1);
- *(u8*)(trailer->tail - 1) = IPPROTO_IPV6;
- top_iph->version = 6;
- top_iph->priority = iph->priority;
- top_iph->flow_lbl[0] = iph->flow_lbl[0];
- top_iph->flow_lbl[1] = iph->flow_lbl[1];
- top_iph->flow_lbl[2] = iph->flow_lbl[2];
- if (x->props.flags & XFRM_STATE_NOECN)
- IP6_ECN_clear(top_iph);
- top_iph->nexthdr = IPPROTO_ESP;
- top_iph->payload_len = htons(skb->len + alen - sizeof(struct ipv6hdr));
- top_iph->hop_limit = iph->hop_limit;
- ipv6_addr_copy(&top_iph->saddr,
- (struct in6_addr *)&x->props.saddr);
- ipv6_addr_copy(&top_iph->daddr,
- (struct in6_addr *)&x->id.daddr);
- } else {
- esph = (struct ipv6_esp_hdr*)skb_push(skb, x->props.header_len);
- skb->h.raw = (unsigned char*)esph;
- top_iph = (struct ipv6hdr*)skb_push(skb, hdr_len);
- memcpy(top_iph, iph, hdr_len);
- kfree(iph);
- top_iph->payload_len = htons(skb->len + alen - sizeof(struct ipv6hdr));
- *(u8*)(trailer->tail - 1) = nexthdr;
- }
+ top_iph = (struct ipv6hdr *)__skb_push(skb, hdr_len);
+ esph = (struct ipv6_esp_hdr *)skb->h.raw;
+ top_iph->payload_len = htons(skb->len + alen - sizeof(*top_iph));
+ *(u8*)(trailer->tail - 1) = *skb->nh.raw;
+ *skb->nh.raw = IPPROTO_ESP;