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[IPV6]: Ensure to have hop-by-hop options in our header of &sk_buff. 

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YOSHIFUJI Hideaki 2006-04-18 14:46:26 -07:00 committed by David S. Miller
parent ef5cb9738b
commit ec6700958a
1 changed files with 12 additions and 0 deletions
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12
net/ipv6/exthdrs.c
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@ -489,6 +489,18 @@ int ipv6_parse_hopopts(struct sk_buff *skb, int nhoff)
{
struct inet6_skb_parm *opt = IP6CB(skb);
/*
* skb->nh.raw is equal to skb->data, and
* skb->h.raw - skb->nh.raw is always equal to
* sizeof(struct ipv6hdr) by definition of
* hop-by-hop options.
*/
if (!pskb_may_pull(skb, sizeof(struct ipv6hdr) + 8) ||
!pskb_may_pull(skb, sizeof(struct ipv6hdr) + ((skb->h.raw[1] + 1) << 3))) {
kfree_skb(skb);
return -1;
}
opt->hop = sizeof(struct ipv6hdr);
if (ip6_parse_tlv(tlvprochopopt_lst, skb)) {
skb->h.raw += (skb->h.raw[1]+1)<<3;