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[SK_BUFF]: Introduce skb_transport_header(skb)

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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>
This commit is contained in:
Arnaldo Carvalho de Melo
2007-04-25 18:04:18 -07:00
committed by David S. Miller
parent a27ef749e7
commit 9c70220b73
42 changed files with 129 additions and 102 deletions
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8
net/ipv4/ipmr.c
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@@ -1437,7 +1437,8 @@ int pim_rcv_v1(struct sk_buff * skb)
pim->group != PIM_V1_VERSION || pim->code != PIM_V1_REGISTER)
goto drop;
encap = (struct iphdr*)(skb->h.raw + sizeof(struct igmphdr));
encap = (struct iphdr *)(skb_transport_header(skb) +
sizeof(struct igmphdr));
/*
Check that:
a. packet is really destinted to a multicast group
@@ -1490,7 +1491,7 @@ static int pim_rcv(struct sk_buff * skb)
if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(*encap)))
goto drop;
pim = (struct pimreghdr*)skb->h.raw;
pim = (struct pimreghdr *)skb_transport_header(skb);
if (pim->type != ((PIM_VERSION<<4)|(PIM_REGISTER)) ||
(pim->flags&PIM_NULL_REGISTER) ||
(ip_compute_csum((void *)pim, sizeof(*pim)) != 0 &&
@@ -1498,7 +1499,8 @@ static int pim_rcv(struct sk_buff * skb)
goto drop;
/* check if the inner packet is destined to mcast group */
encap = (struct iphdr*)(skb->h.raw + sizeof(struct pimreghdr));
encap = (struct iphdr *)(skb_transport_header(skb) +
sizeof(struct pimreghdr));
if (!MULTICAST(encap->daddr) ||
encap->tot_len == 0 ||
ntohs(encap->tot_len) + sizeof(*pim) > skb->len)