- Update to 2.6.25-rc3.

[linux-flexiantxendom0-3.2.10.git] / net / ipv4 / xfrm4_mode_tunnel.c

diff --git a/net/ipv4/xfrm4_mode_tunnel.c b/net/ipv4/xfrm4_mode_tunnel.c
index e4deecb..8dee617 100644 (file)
--- a/net/ipv4/xfrm4_mode_tunnel.c
+++ b/net/ipv4/xfrm4_mode_tunnel.c
@@ -16,92 +16,60 @@
 
 static inline void ipip_ecn_decapsulate(struct sk_buff *skb)
 {
-       struct iphdr *outer_iph = ip_hdr(skb);
        struct iphdr *inner_iph = ipip_hdr(skb);
 
-       if (INET_ECN_is_ce(outer_iph->tos))
+       if (INET_ECN_is_ce(XFRM_MODE_SKB_CB(skb)->tos))
                IP_ECN_set_ce(inner_iph);
 }
 
-static inline void ipip6_ecn_decapsulate(struct iphdr *iph, struct sk_buff *skb)
-{
-       if (INET_ECN_is_ce(iph->tos))
-               IP6_ECN_set_ce(ipv6_hdr(skb));
-}
-
 /* Add encapsulation header.
  *
  * The top IP header will be constructed per RFC 2401.
  */
-static int xfrm4_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
+static int xfrm4_mode_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
 {
        struct dst_entry *dst = skb->dst;
-       struct xfrm_dst *xdst = (struct xfrm_dst*)dst;
-       struct iphdr *iph, *top_iph;
+       struct iphdr *top_iph;
        int flags;
 
-       iph = ip_hdr(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);
+       skb->transport_header = skb->network_header + sizeof(*top_iph);
        top_iph = ip_hdr(skb);
 
        top_iph->ihl = 5;
        top_iph->version = 4;
 
-       flags = x->props.flags;
+       top_iph->protocol = x->inner_mode->afinfo->proto;
 
        /* DS disclosed */
-       if (xdst->route->ops->family == AF_INET) {
-               top_iph->protocol = IPPROTO_IPIP;
-               top_iph->tos = INET_ECN_encapsulate(iph->tos, iph->tos);
-               top_iph->frag_off = (flags & XFRM_STATE_NOPMTUDISC) ?
-                       0 : (iph->frag_off & htons(IP_DF));
-       }
-#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
-       else {
-               struct ipv6hdr *ipv6h = (struct ipv6hdr*)iph;
-               top_iph->protocol = IPPROTO_IPV6;
-               top_iph->tos = INET_ECN_encapsulate(iph->tos, ipv6_get_dsfield(ipv6h));
-               top_iph->frag_off = 0;
-       }
-#endif
+       top_iph->tos = INET_ECN_encapsulate(XFRM_MODE_SKB_CB(skb)->tos,
+                                           XFRM_MODE_SKB_CB(skb)->tos);
 
+       flags = x->props.flags;
        if (flags & XFRM_STATE_NOECN)
                IP_ECN_clear(top_iph);
 
-       if (!top_iph->frag_off)
-               __ip_select_ident(top_iph, dst->child, 0);
+       top_iph->frag_off = (flags & XFRM_STATE_NOPMTUDISC) ?
+                           0 : XFRM_MODE_SKB_CB(skb)->frag_off;
+       ip_select_ident(top_iph, dst->child, NULL);
 
        top_iph->ttl = dst_metric(dst->child, RTAX_HOPLIMIT);
 
        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;
 }
 
-static int xfrm4_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
+static int xfrm4_mode_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
 {
-       struct iphdr *iph = ip_hdr(skb);
        const unsigned char *old_mac;
        int err = -EINVAL;
 
-       switch (iph->protocol){
-               case IPPROTO_IPIP:
-                       break;
-#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
-               case IPPROTO_IPV6:
-                       break;
-#endif
-               default:
-                       goto out;
-       }
+       if (XFRM_MODE_SKB_CB(skb)->protocol != IPPROTO_IPIP)
+               goto out;
 
        if (!pskb_may_pull(skb, sizeof(struct iphdr)))
                goto out;
@@ -110,20 +78,11 @@ 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, ipip_hdr(skb));
-               if (!(x->props.flags & XFRM_STATE_NOECN))
-                       ipip_ecn_decapsulate(skb);
-       }
-#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
-       else {
-               if (!(x->props.flags & XFRM_STATE_NOECN))
-                       ipip6_ecn_decapsulate(iph, skb);
-               skb->protocol = htons(ETH_P_IPV6);
-       }
-#endif
+       if (x->props.flags & XFRM_STATE_DECAP_DSCP)
+               ipv4_copy_dscp(XFRM_MODE_SKB_CB(skb)->tos, ipip_hdr(skb));
+       if (!(x->props.flags & XFRM_STATE_NOECN))
+               ipip_ecn_decapsulate(skb);
+
        old_mac = skb_mac_header(skb);
        skb_set_mac_header(skb, -skb->mac_len);
        memmove(skb_mac_header(skb), old_mac, skb->mac_len);
@@ -135,19 +94,21 @@ out:
 }
 
 static struct xfrm_mode xfrm4_tunnel_mode = {
-       .input = xfrm4_tunnel_input,
-       .output = xfrm4_tunnel_output,
+       .input2 = xfrm4_mode_tunnel_input,
+       .input = xfrm_prepare_input,
+       .output2 = xfrm4_mode_tunnel_output,
+       .output = xfrm4_prepare_output,
        .owner = THIS_MODULE,
        .encap = XFRM_MODE_TUNNEL,
        .flags = XFRM_MODE_FLAG_TUNNEL,
 };
 
-static int __init xfrm4_tunnel_init(void)
+static int __init xfrm4_mode_tunnel_init(void)
 {
        return xfrm_register_mode(&xfrm4_tunnel_mode, AF_INET);
 }
 
-static void __exit xfrm4_tunnel_exit(void)
+static void __exit xfrm4_mode_tunnel_exit(void)
 {
        int err;
 
@@ -155,7 +116,7 @@ static void __exit xfrm4_tunnel_exit(void)
        BUG_ON(err);
 }
 
-module_init(xfrm4_tunnel_init);
-module_exit(xfrm4_tunnel_exit);
+module_init(xfrm4_mode_tunnel_init);
+module_exit(xfrm4_mode_tunnel_exit);
 MODULE_LICENSE("GPL");
 MODULE_ALIAS_XFRM_MODE(AF_INET, XFRM_MODE_TUNNEL);