[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/bridge/br_netfilter.c b/net/bridge/br_netfilter.c
index 1163c4f..8a56d89 100644
--- a/net/bridge/br_netfilter.c
+++ b/net/bridge/br_netfilter.c
@@ -374,7 +374,8 @@
{
unsigned char *raw = (u8 *) (skb->nh.ipv6h + 1);
u32 pkt_len;
- int off = raw - skb->nh.raw;
+ const unsigned char *nh = skb_network_header(skb);
+ int off = raw - nh;
int len = (raw[1] + 1) << 3;
if ((raw + len) - skb->data > skb_headlen(skb))
@@ -384,9 +385,9 @@
len -= 2;
while (len > 0) {
- int optlen = skb->nh.raw[off + 1] + 2;
+ int optlen = nh[off + 1] + 2;
- switch (skb->nh.raw[off]) {
+ switch (nh[off]) {
case IPV6_TLV_PAD0:
optlen = 1;
break;
@@ -395,9 +396,9 @@
break;
case IPV6_TLV_JUMBO:
- if (skb->nh.raw[off + 1] != 4 || (off & 3) != 2)
+ if (nh[off + 1] != 4 || (off & 3) != 2)
goto bad;
- pkt_len = ntohl(*(__be32 *) (skb->nh.raw + off + 2));
+ pkt_len = ntohl(*(__be32 *) (nh + off + 2));
if (pkt_len <= IPV6_MAXPLEN ||
skb->nh.ipv6h->payload_len)
goto bad;
@@ -406,6 +407,7 @@
if (pskb_trim_rcsum(skb,
pkt_len + sizeof(struct ipv6hdr)))
goto bad;
+ nh = skb_network_header(skb);
break;
default:
if (optlen > len)