[SK_BUFF]: Introduce skb_network_offset()
For the quite common 'skb->nh.raw - skb->data' sequence.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index a91dfbc..aa4a0a5 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -206,7 +206,7 @@
{
u8 _optval, *op;
- offset += skb->nh.raw - skb->data;
+ offset += skb_network_offset(skb);
op = skb_header_pointer(skb, offset, sizeof(_optval), &_optval);
if (op == NULL)
return 1;
@@ -431,7 +431,7 @@
tclass = 0;
msg.skb = skb;
- msg.offset = skb->nh.raw - skb->data;
+ msg.offset = skb_network_offset(skb);
msg.type = type;
len = skb->len - msg.offset;
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 8a7b5c7..47d0021 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -89,7 +89,7 @@
static int ip6_dev_loopback_xmit(struct sk_buff *newskb)
{
skb_reset_mac_header(newskb);
- __skb_pull(newskb, newskb->nh.raw - newskb->data);
+ __skb_pull(newskb, skb_network_offset(newskb));
newskb->pkt_type = PACKET_LOOPBACK;
newskb->ip_summed = CHECKSUM_UNNECESSARY;
BUG_TRAP(newskb->dst);
@@ -1330,7 +1330,7 @@
/* move skb->data to ip header from ext header */
if (skb->data < skb->nh.raw)
- __skb_pull(skb, skb->nh.raw - skb->data);
+ __skb_pull(skb, skb_network_offset(skb));
while ((tmp_skb = __skb_dequeue(&sk->sk_write_queue)) != NULL) {
__skb_pull(tmp_skb, skb->h.raw - skb->nh.raw);
*tail_skb = tmp_skb;