[SK_BUFF]: Introduce skb_transport_header(skb)

For the places where we need a pointer to the transport header, it is
still legal to touch skb->h.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, 4 insertions, 2 deletions

diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 602268661eb3..11029b9d4cf7 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -1128,7 +1128,7 @@ ssize_t	ip_append_page(struct sock *sk, struct page *page,
                         if (fraggap) {
                                 skb->csum = skb_copy_and_csum_bits(skb_prev,
                                                                    maxfraglen,
-                                                                   skb->h.raw,
+                                                    skb_transport_header(skb),
                                                                    fraggap, 0);
                                 skb_prev->csum = csum_sub(skb_prev->csum,
                                                           skb->csum);
@@ -1374,7 +1374,9 @@ void ip_send_reply(struct sock *sk, struct sk_buff *skb, struct ip_reply_arg *ar
                        &ipc, rt, MSG_DONTWAIT);
         if ((skb = skb_peek(&sk->sk_write_queue)) != NULL) {
                 if (arg->csumoffset >= 0)
-                        *((__sum16 *)skb->h.raw + arg->csumoffset) = csum_fold(csum_add(skb->csum, arg->csum));
+                        *((__sum16 *)skb_transport_header(skb) +
+                          arg->csumoffset) = csum_fold(csum_add(skb->csum,
+                                                                arg->csum));
                 skb->ip_summed = CHECKSUM_NONE;
                 ip_push_pending_frames(sk);
         }