[IPSEC]: Use IPv6 calling convention as the convention for x->mode->output
The IPv6 calling convention for x->mode->output is more general and could
help an eventual protocol-generic x->type->output implementation. This
patch adopts it for IPv4 as well and modifies the IPv4 type output functions
accordingly.
It also rewrites the IPv6 mac/transport header calculation to be based off
the network header where practical.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/xfrm6_mode_ro.c b/net/ipv6/xfrm6_mode_ro.c
index 5c29b36..957ae36 100644
--- a/net/ipv6/xfrm6_mode_ro.c
+++ b/net/ipv6/xfrm6_mode_ro.c
@@ -37,13 +37,6 @@
*
* The IP header and mutable extension headers will be moved forward to make
* space for the route optimization header.
- *
- * On exit, skb->h will be set to the start of the encapsulation header to be
- * filled in by x->type->output and the mac header will be set to the
- * nextheader field of the extension header directly preceding the
- * encapsulation header, or in its absence, that of the top IP header.
- * The value of the network header will always point to the top IP header
- * while skb->data will point to the payload.
*/
static int xfrm6_ro_output(struct xfrm_state *x, struct sk_buff *skb)
{
@@ -56,7 +49,7 @@
hdr_len = x->type->hdr_offset(x, skb, &prevhdr);
skb_set_mac_header(skb, (prevhdr - x->props.header_len) - skb->data);
skb_set_network_header(skb, -x->props.header_len);
- skb_set_transport_header(skb, hdr_len - x->props.header_len);
+ skb->transport_header = skb->network_header + hdr_len;
__skb_pull(skb, hdr_len);
memmove(ipv6_hdr(skb), iph, hdr_len);