[SK_BUFF]: Introduce skb_network_header()
For the places where we need a pointer to the network header, it is still legal
to touch skb->nh.raw directly if just adding to, subtracting from or setting it
to another layer header.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c
index 7194eb4..95ddbbd 100644
--- a/net/ipv4/ah4.c
+++ b/net/ipv4/ah4.c
@@ -154,7 +154,7 @@
ah = (struct ip_auth_hdr*)skb->data;
iph = skb->nh.iph;
- ihl = skb->data - skb->nh.raw;
+ ihl = skb->data - skb_network_header(skb);
memcpy(work_buf, iph, ihl);
iph->ttl = 0;
@@ -181,7 +181,8 @@
}
}
((struct iphdr*)work_buf)->protocol = ah->nexthdr;
- skb->h.raw = memcpy(skb->nh.raw += ah_hlen, work_buf, ihl);
+ skb->nh.raw += ah_hlen;
+ skb->h.raw = memcpy(skb_network_header(skb), work_buf, ihl);
__skb_pull(skb, ah_hlen + ihl);
return 0;