[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>

1 files changed, 3 insertions, 2 deletions

diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 5f26645195dc..9b2bcde73f19 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -361,7 +361,7 @@ int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 
         if (skb->ip_summed == CHECKSUM_COMPLETE) {
-                skb_postpull_rcsum(skb, skb->nh.raw,
+                skb_postpull_rcsum(skb, skb_network_header(skb),
                                    skb->h.raw - skb->nh.raw);
                 if (!csum_ipv6_magic(&skb->nh.ipv6h->saddr,
                                      &skb->nh.ipv6h->daddr,
@@ -488,7 +488,8 @@ static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
                 goto out;
 
         offset = rp->offset;
-        total_len = inet_sk(sk)->cork.length - (skb->nh.raw - skb->data);
+        total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) -
+                                                skb->data);
         if (offset >= total_len - 1) {
                 err = -EINVAL;
                 ip6_flush_pending_frames(sk);