[PATCH] IPv4 IPComp

[Mitsuru KANDA / 神田 充 <mk@xxxxxxxxxxxxxx>]

Hello,

In ipcomp_input():

The original IP header(iph) is stored(copied) in tmp_iph.

But after skb_pull(), tmp_iph is copied back to 
same place where the original IP header exists in skb->nh.raw.

I believe the attached diff is to fix it for correct behavior 
which you intend.

Could you check it?

        

Regards,
-mk


===== ipcomp.c 1.4 vs edited =====
--- 1.4/net/ipv4/ipcomp.c       Sun May  4 22:26:55 2003
+++ edited/ipcomp.c     Thu May  8 02:41:47 2003
@@ -94,7 +94,9 @@
        memcpy(&tmp_iph, iph, iph->ihl * 4);
        nexthdr = *(u8 *)skb->data;
        skb_pull(skb, sizeof(struct ipcomp_hdr));
+       skb->nh.raw += sizeof(struct ipcomp_hdr);
        memcpy(skb->nh.raw, &tmp_iph, tmp_iph.iph.ihl * 4);
+       iph = skb->nh.iph;
        iph->tot_len = htons(ntohs(iph->tot_len) - sizeof(struct ipcomp_hdr));
        iph->protocol = nexthdr;
        skb->h.raw = skb->data;