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Diffstat (limited to 'net/ipv4/ipcomp.c')
-rw-r--r--net/ipv4/ipcomp.c22
1 files changed, 5 insertions, 17 deletions
diff --git a/net/ipv4/ipcomp.c b/net/ipv4/ipcomp.c
index 78d6ddb02d1..32b02deca2e 100644
--- a/net/ipv4/ipcomp.c
+++ b/net/ipv4/ipcomp.c
@@ -98,10 +98,9 @@ out:
static int ipcomp_compress(struct xfrm_state *x, struct sk_buff *skb)
{
struct ipcomp_data *ipcd = x->data;
- const int ihlen = skb_transport_offset(skb);
- const int plen = skb->len - ihlen;
+ const int plen = skb->len;
int dlen = IPCOMP_SCRATCH_SIZE;
- u8 *start = skb_transport_header(skb);
+ u8 *start = skb->data;
const int cpu = get_cpu();
u8 *scratch = *per_cpu_ptr(ipcomp_scratches, cpu);
struct crypto_comp *tfm = *per_cpu_ptr(ipcd->tfms, cpu);
@@ -118,7 +117,7 @@ static int ipcomp_compress(struct xfrm_state *x, struct sk_buff *skb)
memcpy(start + sizeof(struct ip_comp_hdr), scratch, dlen);
put_cpu();
- pskb_trim(skb, ihlen + dlen + sizeof(struct ip_comp_hdr));
+ pskb_trim(skb, dlen + sizeof(struct ip_comp_hdr));
return 0;
out:
@@ -131,13 +130,8 @@ static int ipcomp_output(struct xfrm_state *x, struct sk_buff *skb)
int err;
struct ip_comp_hdr *ipch;
struct ipcomp_data *ipcd = x->data;
- int hdr_len = 0;
- struct iphdr *iph = ip_hdr(skb);
- skb_push(skb, -skb_network_offset(skb));
- iph->tot_len = htons(skb->len);
- hdr_len = iph->ihl * 4;
- if ((skb->len - hdr_len) < ipcd->threshold) {
+ if (skb->len < ipcd->threshold) {
/* Don't bother compressing */
goto out_ok;
}
@@ -146,25 +140,19 @@ static int ipcomp_output(struct xfrm_state *x, struct sk_buff *skb)
goto out_ok;
err = ipcomp_compress(x, skb);
- iph = ip_hdr(skb);
if (err) {
goto out_ok;
}
/* Install ipcomp header, convert into ipcomp datagram. */
- iph->tot_len = htons(skb->len);
ipch = ip_comp_hdr(skb);
ipch->nexthdr = *skb_mac_header(skb);
ipch->flags = 0;
ipch->cpi = htons((u16 )ntohl(x->id.spi));
*skb_mac_header(skb) = IPPROTO_COMP;
- ip_send_check(iph);
- return 0;
-
out_ok:
- if (x->props.mode == XFRM_MODE_TUNNEL)
- ip_send_check(iph);
+ skb_push(skb, -skb_network_offset(skb));
return 0;
}