[SK_BUFF]: Introduce ip_hdr(), remove skb->nh.iph

[net-next-2.6.git] / net / ipv4 / xfrm4_mode_tunnel.c

diff --git a/net/ipv4/xfrm4_mode_tunnel.c b/net/ipv4/xfrm4_mode_tunnel.c
index e1cab33fdad1333506ce906b453e11ec8feee6bc..faa1b9a76e763fc9479ae94259ff9f2ad6a59e06 100644 (file)
--- a/net/ipv4/xfrm4_mode_tunnel.c
+++ b/net/ipv4/xfrm4_mode_tunnel.c
@@ -16,7 +16,7 @@
 
 static inline void ipip_ecn_decapsulate(struct sk_buff *skb)
 {
-       struct iphdr *outer_iph = skb->nh.iph;
+       struct iphdr *outer_iph = ip_hdr(skb);
        struct iphdr *inner_iph = skb->h.ipiph;
 
        if (INET_ECN_is_ce(outer_iph->tos))
@@ -46,11 +46,12 @@ static int xfrm4_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
        struct iphdr *iph, *top_iph;
        int flags;
 
-       iph = skb->nh.iph;
+       iph = ip_hdr(skb);
        skb->h.ipiph = iph;
 
-       skb->nh.raw = skb_push(skb, x->props.header_len);
-       top_iph = skb->nh.iph;
+       skb_push(skb, x->props.header_len);
+       skb_reset_network_header(skb);
+       top_iph = ip_hdr(skb);
 
        top_iph->ihl = 5;
        top_iph->version = 4;
@@ -90,10 +91,11 @@ static int xfrm4_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
 
 static int xfrm4_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
 {
-       struct iphdr *iph = skb->nh.iph;
+       struct iphdr *iph = ip_hdr(skb);
+       const unsigned char *old_mac;
        int err = -EINVAL;
 
-       switch(iph->protocol){
+       switch (iph->protocol){
                case IPPROTO_IPIP:
                        break;
 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
@@ -111,6 +113,7 @@ static int xfrm4_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
            (err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC)))
                goto out;
 
+       iph = ip_hdr(skb);
        if (iph->protocol == IPPROTO_IPIP) {
                if (x->props.flags & XFRM_STATE_DECAP_DSCP)
                        ipv4_copy_dscp(iph, skb->h.ipiph);
@@ -124,9 +127,10 @@ static int xfrm4_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
                skb->protocol = htons(ETH_P_IPV6);
        }
 #endif
-       skb->mac.raw = memmove(skb->data - skb->mac_len,
-                              skb->mac.raw, skb->mac_len);
-       skb->nh.raw = skb->data;
+       old_mac = skb_mac_header(skb);
+       skb_set_mac_header(skb, -skb->mac_len);
+       memmove(skb_mac_header(skb), old_mac, skb->mac_len);
+       skb_reset_network_header(skb);
        err = 0;
 
 out: