diff options
Diffstat (limited to 'net/ipv4/ipcomp.c')
| -rw-r--r-- | net/ipv4/ipcomp.c | 23 |
1 files changed, 5 insertions, 18 deletions
diff --git a/net/ipv4/ipcomp.c b/net/ipv4/ipcomp.c index 95278b22b669..8e243589045f 100644 --- a/net/ipv4/ipcomp.c +++ b/net/ipv4/ipcomp.c @@ -45,7 +45,6 @@ static LIST_HEAD(ipcomp_tfms_list); static int ipcomp_decompress(struct xfrm_state *x, struct sk_buff *skb) { int err, plen, dlen; - struct iphdr *iph; struct ipcomp_data *ipcd = x->data; u8 *start, *scratch; struct crypto_tfm *tfm; @@ -74,8 +73,6 @@ static int ipcomp_decompress(struct xfrm_state *x, struct sk_buff *skb) skb_put(skb, dlen - plen); memcpy(skb->data, scratch, dlen); - iph = skb->nh.iph; - iph->tot_len = htons(dlen + iph->ihl * 4); out: put_cpu(); return err; @@ -83,14 +80,9 @@ out: static int ipcomp_input(struct xfrm_state *x, struct sk_buff *skb) { - u8 nexthdr; int err = 0; struct iphdr *iph; - union { - struct iphdr iph; - char buf[60]; - } tmp_iph; - + struct ip_comp_hdr *ipch; if ((skb_is_nonlinear(skb) || skb_cloned(skb)) && skb_linearize(skb, GFP_ATOMIC) != 0) { @@ -102,15 +94,10 @@ static int ipcomp_input(struct xfrm_state *x, struct sk_buff *skb) /* Remove ipcomp header and decompress original payload */ iph = skb->nh.iph; - memcpy(&tmp_iph, iph, iph->ihl * 4); - nexthdr = *(u8 *)skb->data; - skb_pull(skb, sizeof(struct ip_comp_hdr)); - skb->nh.raw += sizeof(struct ip_comp_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 ip_comp_hdr)); - iph->protocol = nexthdr; - skb->h.raw = skb->data; + ipch = (void *)skb->data; + iph->protocol = ipch->nexthdr; + skb->h.raw = skb->nh.raw + sizeof(*ipch); + __skb_pull(skb, sizeof(*ipch)); err = ipcomp_decompress(x, skb); out: |