[INET]: Omit double hash calculations in xxx_frag_intern

[linux-2.6-omap-h63xx.git] / net / ipv4 / xfrm4_mode_tunnel.c

diff --git a/net/ipv4/xfrm4_mode_tunnel.c b/net/ipv4/xfrm4_mode_tunnel.c
index a2f2e6a5ec5d1662e6ba0b372af47059288cebaf..1ae9d32276f0a8daa13cf8abbf743b34c691f0f8 100644 (file)
--- a/net/ipv4/xfrm4_mode_tunnel.c
+++ b/net/ipv4/xfrm4_mode_tunnel.c
@@ -31,13 +31,7 @@ static inline void ipip6_ecn_decapsulate(struct iphdr *iph, struct sk_buff *skb)
 
 /* Add encapsulation header.
  *
- * The top IP header will be constructed per RFC 2401.  The following fields
- * in it shall be filled in by x->type->output:
- *      tot_len
- *      check
- *
- * On exit, skb->h will be set to the start of the payload to be processed
- * by x->type->output and skb->nh will be set to the top IP header.
+ * The top IP header will be constructed per RFC 2401.
  */
 static int xfrm4_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
 {
@@ -47,10 +41,11 @@ static int xfrm4_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
        int flags;
 
        iph = ip_hdr(skb);
-       skb->transport_header = skb->network_header;
 
-       skb_push(skb, x->props.header_len);
-       skb_reset_network_header(skb);
+       skb_set_network_header(skb, -x->props.header_len);
+       skb->mac_header = skb->network_header +
+                         offsetof(struct iphdr, protocol);
+       skb->transport_header = skb->network_header + sizeof(*iph);
        top_iph = ip_hdr(skb);
 
        top_iph->ihl = 5;
@@ -85,6 +80,8 @@ static int xfrm4_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
        top_iph->saddr = x->props.saddr.a4;
        top_iph->daddr = x->id.daddr.a4;
 
+       skb->protocol = htons(ETH_P_IP);
+
        memset(&(IPCB(skb)->opt), 0, sizeof(struct ip_options));
        return 0;
 }