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[SK_BUFF]: Introduce skb_network_header()

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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>
This commit is contained in:
Arnaldo Carvalho de Melo
2007-04-10 20:50:43 -07:00
committed by David S. Miller
parent bbe735e424
commit d56f90a7c9
59 changed files with 258 additions and 185 deletions
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12
net/bridge/br_netfilter.c
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@@ -374,7 +374,8 @@ static int check_hbh_len(struct sk_buff *skb)
{
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 @@ static int check_hbh_len(struct sk_buff *skb)
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 @@ static int check_hbh_len(struct sk_buff *skb)
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 @@ static int check_hbh_len(struct sk_buff *skb)
if (pskb_trim_rcsum(skb,
pkt_len + sizeof(struct ipv6hdr)))
goto bad;
nh = skb_network_header(skb);
break;
default:
if (optlen > len)