vserver 1.9.3

[linux-2.6.git] / net / ipv4 / xfrm4_tunnel.c

diff --git a/net/ipv4/xfrm4_tunnel.c b/net/ipv4/xfrm4_tunnel.c
index accc0c8..dcc0464 100644 (file)
--- a/net/ipv4/xfrm4_tunnel.c
+++ b/net/ipv4/xfrm4_tunnel.c
@@ -4,83 +4,20 @@
  */
 
 #include <linux/skbuff.h>
+#include <linux/module.h>
 #include <net/xfrm.h>
 #include <net/ip.h>
-#include <net/icmp.h>
-#include <net/inet_ecn.h>
-
-int xfrm4_tunnel_check_size(struct sk_buff *skb)
-{
-       int mtu, ret = 0;
-       struct dst_entry *dst;
-       struct iphdr *iph = skb->nh.iph;
-
-       if (IPCB(skb)->flags & IPSKB_XFRM_TUNNEL_SIZE)
-               goto out;
-
-       IPCB(skb)->flags |= IPSKB_XFRM_TUNNEL_SIZE;
-       
-       if (!(iph->frag_off & htons(IP_DF)))
-               goto out;
-
-       dst = skb->dst;
-       mtu = dst_pmtu(dst) - dst->header_len - dst->trailer_len;
-       if (skb->len > mtu) {
-               icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu));
-               ret = -EMSGSIZE;
-       }
-out:
-       return ret;
-}
+#include <net/protocol.h>
 
 static int ipip_output(struct sk_buff *skb)
 {
-       struct dst_entry *dst = skb->dst;
-       struct xfrm_state *x = dst->xfrm;
-       struct iphdr *iph, *top_iph;
-       int tos, err;
-
-       if ((err = xfrm4_tunnel_check_size(skb)) != 0)
-               goto error_nolock;
-               
+       struct iphdr *iph;
+       
        iph = skb->nh.iph;
+       iph->tot_len = htons(skb->len);
+       ip_send_check(iph);
 
-       spin_lock_bh(&x->lock);
-
-       tos = iph->tos;
-
-       top_iph = (struct iphdr *) skb_push(skb, x->props.header_len);
-       top_iph->ihl = 5;
-       top_iph->version = 4;
-       top_iph->tos = INET_ECN_encapsulate(tos, iph->tos);
-       top_iph->tot_len = htons(skb->len);
-       top_iph->frag_off = iph->frag_off & ~htons(IP_MF|IP_OFFSET);
-       if (!(iph->frag_off & htons(IP_DF)))
-               __ip_select_ident(top_iph, dst, 0);
-       top_iph->ttl = iph->ttl;
-       top_iph->protocol = IPPROTO_IPIP;
-       top_iph->check = 0;
-       top_iph->saddr = x->props.saddr.a4;
-       top_iph->daddr = x->id.daddr.a4;
-       memset(&(IPCB(skb)->opt), 0, sizeof(struct ip_options));
-       ip_send_check(top_iph);
-
-       skb->nh.raw = skb->data;
-       x->curlft.bytes += skb->len;
-       x->curlft.packets++;
-
-       spin_unlock_bh(&x->lock);
-
-       if ((skb->dst = dst_pop(dst)) == NULL) {
-               kfree_skb(skb);
-               err = -EHOSTUNREACH;
-               goto error_nolock;
-       }
-       return NET_XMIT_BYPASS;
-
-error_nolock:
-       kfree_skb(skb);
-       return err;
+       return 0;
 }
 
 static int ipip_xfrm_rcv(struct xfrm_state *x, struct xfrm_decap_state *decap, struct sk_buff *skb)
@@ -106,6 +43,8 @@ int xfrm4_tunnel_register(struct xfrm_tunnel *handler)
        return ret;
 }
 
+EXPORT_SYMBOL(xfrm4_tunnel_register);
+
 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler)
 {
        int ret;
@@ -123,6 +62,8 @@ int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler)
        return ret;
 }
 
+EXPORT_SYMBOL(xfrm4_tunnel_deregister);
+
 static int ipip_rcv(struct sk_buff *skb)
 {
        struct xfrm_tunnel *handler = ipip_handler;
@@ -131,7 +72,7 @@ static int ipip_rcv(struct sk_buff *skb)
        if (handler && handler->handler(skb) == 0)
                return 0;
 
-       return xfrm4_rcv_encap(skb, 0);
+       return xfrm4_rcv(skb);
 }
 
 static void ipip_err(struct sk_buff *skb, u32 info)
@@ -147,6 +88,10 @@ static int ipip_init_state(struct xfrm_state *x, void *args)
 {
        if (!x->props.mode)
                return -EINVAL;
+
+       if (x->encap)
+               return -EINVAL;
+
        x->props.header_len = sizeof(struct iphdr);
 
        return 0;
@@ -166,7 +111,7 @@ static struct xfrm_type ipip_type = {
        .output         = ipip_output
 };
 
-static struct inet_protocol ipip_protocol = {
+static struct net_protocol ipip_protocol = {
        .handler        =       ipip_rcv,
        .err_handler    =       ipip_err,
        .no_policy      =       1,