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authorPatrick McHardy <kaber@trash.net>2007-04-05 16:03:33 -0700
committerDavid S. Miller <davem@davemloft.net>2007-04-05 16:03:33 -0700
commit254d0d24e31c3df64ccfff349c9aa9d1e5989819 (patch)
treeadcbb19764ed646adb5fa2008d5a94d97db54566 /net/ipv4/xfrm4_mode_beet.c
parent[XFRM]: beet: fix beet mode decapsulation (diff)
downloadlinux-dev-254d0d24e31c3df64ccfff349c9aa9d1e5989819.tar.xz
linux-dev-254d0d24e31c3df64ccfff349c9aa9d1e5989819.zip
[XFRM]: beet: fix IP option decapsulation
Beet mode looks for the beet pseudo header after the outer IP header, which is wrong since that is followed by the ESP header. Additionally it needs to adjust the packet length after removing the pseudo header and point the data pointer to the real data location. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/xfrm4_mode_beet.c')
-rw-r--r--net/ipv4/xfrm4_mode_beet.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/net/ipv4/xfrm4_mode_beet.c b/net/ipv4/xfrm4_mode_beet.c
index b94775a86863..f68dfd8a0f5c 100644
--- a/net/ipv4/xfrm4_mode_beet.c
+++ b/net/ipv4/xfrm4_mode_beet.c
@@ -78,10 +78,11 @@ static int xfrm4_beet_input(struct xfrm_state *x, struct sk_buff *skb)
protocol = iph->protocol;
if (unlikely(iph->protocol == IPPROTO_BEETPH)) {
- struct ip_beet_phdr *ph = (struct ip_beet_phdr*)(iph + 1);
+ struct ip_beet_phdr *ph;
if (!pskb_may_pull(skb, sizeof(*ph)))
goto out;
+ ph = (struct ip_beet_phdr *)(skb->h.ipiph + 1);
phlen = sizeof(*ph) + ph->padlen;
optlen = ph->hdrlen * 8 - phlen;
@@ -90,6 +91,7 @@ static int xfrm4_beet_input(struct xfrm_state *x, struct sk_buff *skb)
if (!pskb_may_pull(skb, phlen + optlen))
goto out;
+ skb->len -= phlen + optlen;
ph_nexthdr = ph->nexthdr;
}
@@ -97,6 +99,7 @@ static int xfrm4_beet_input(struct xfrm_state *x, struct sk_buff *skb)
skb->nh.raw = skb->data + (phlen - sizeof(*iph));
memmove(skb->nh.raw, iph, sizeof(*iph));
skb->h.raw = skb->data + (phlen + optlen);
+ skb->data = skb->h.raw;
iph = skb->nh.iph;
iph->ihl = (sizeof(*iph) + optlen) / 4;