[IPSEC]: Move IP length/checksum setting out of transforms

This patch moves the setting of the IP length and checksum fields out of
the transforms and into the xfrmX_output functions.  This would help future
efforts in merging the transforms themselves.

It also adds an optimisation to ipcomp due to the fact that the transport
offset is guaranteed to be zero.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 5 deletions

diff --git a/net/ipv4/xfrm4_tunnel.c b/net/ipv4/xfrm4_tunnel.c
index be572f918b5e..e1fafc1562d8 100644
--- a/net/ipv4/xfrm4_tunnel.c
+++ b/net/ipv4/xfrm4_tunnel.c
@@ -12,12 +12,7 @@
 
 static int ipip_output(struct xfrm_state *x, struct sk_buff *skb)
 {
-        struct iphdr *iph = ip_hdr(skb);
-
         skb_push(skb, -skb_network_offset(skb));
-        iph->tot_len = htons(skb->len);
-        ip_send_check(iph);
-
         return 0;
 }