Revert to Fedora kernel-2.6.17-1.2187_FC5 patched with vs2.0.2.1; there are too many...

[linux-2.6.git] / net / ipv6 / xfrm6_output.c

diff --git a/net/ipv6/xfrm6_output.c b/net/ipv6/xfrm6_output.c
index c8c8b44..e9ea338 100644 (file)
--- a/net/ipv6/xfrm6_output.c
+++ b/net/ipv6/xfrm6_output.c
@@ -14,9 +14,68 @@
 #include <linux/spinlock.h>
 #include <linux/icmpv6.h>
 #include <linux/netfilter_ipv6.h>
+#include <net/dsfield.h>
+#include <net/inet_ecn.h>
 #include <net/ipv6.h>
 #include <net/xfrm.h>
 
+/* Add encapsulation header.
+ *
+ * In transport mode, the IP header and mutable extension headers will be moved
+ * forward to make space for the encapsulation header.
+ *
+ * In tunnel mode, the top IP header will be constructed per RFC 2401.
+ * The following fields in it shall be filled in by x->type->output:
+ *     payload_len
+ *
+ * On exit, skb->h will be set to the start of the encapsulation header to be
+ * filled in by x->type->output and skb->nh 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 skb->data will always
+ * point to the top IP header.
+ */
+static void xfrm6_encap(struct sk_buff *skb)
+{
+       struct dst_entry *dst = skb->dst;
+       struct xfrm_state *x = dst->xfrm;
+       struct ipv6hdr *iph, *top_iph;
+       int dsfield;
+
+       skb_push(skb, x->props.header_len);
+       iph = skb->nh.ipv6h;
+
+       if (!x->props.mode) {
+               u8 *prevhdr;
+               int hdr_len;
+
+               hdr_len = ip6_find_1stfragopt(skb, &prevhdr);
+               skb->nh.raw = prevhdr - x->props.header_len;
+               skb->h.raw = skb->data + hdr_len;
+               memmove(skb->data, iph, hdr_len);
+               return;
+       }
+
+       skb->nh.raw = skb->data;
+       top_iph = skb->nh.ipv6h;
+       skb->nh.raw = &top_iph->nexthdr;
+       skb->h.ipv6h = top_iph + 1;
+
+       top_iph->version = 6;
+       top_iph->priority = iph->priority;
+       top_iph->flow_lbl[0] = iph->flow_lbl[0];
+       top_iph->flow_lbl[1] = iph->flow_lbl[1];
+       top_iph->flow_lbl[2] = iph->flow_lbl[2];
+       dsfield = ipv6_get_dsfield(top_iph);
+       dsfield = INET_ECN_encapsulate(dsfield, dsfield);
+       if (x->props.flags & XFRM_STATE_NOECN)
+               dsfield &= ~INET_ECN_MASK;
+       ipv6_change_dsfield(top_iph, 0, dsfield);
+       top_iph->nexthdr = IPPROTO_IPV6; 
+       top_iph->hop_limit = dst_metric(dst->child, RTAX_HOPLIMIT);
+       ipv6_addr_copy(&top_iph->saddr, (struct in6_addr *)&x->props.saddr);
+       ipv6_addr_copy(&top_iph->daddr, (struct in6_addr *)&x->id.daddr);
+}
+
 static int xfrm6_tunnel_check_size(struct sk_buff *skb)
 {
        int mtu, ret = 0;
@@ -59,9 +118,7 @@ static int xfrm6_output_one(struct sk_buff *skb)
                if (err)
                        goto error;
 
-               err = x->mode->output(skb);
-               if (err)
-                       goto error;
+               xfrm6_encap(skb);
 
                err = x->type->output(x, skb);
                if (err)
@@ -125,7 +182,7 @@ static int xfrm6_output_finish(struct sk_buff *skb)
        if (!skb_is_gso(skb))
                return xfrm6_output_finish2(skb);
 
-       skb->protocol = htons(ETH_P_IPV6);
+       skb->protocol = htons(ETH_P_IP);
        segs = skb_gso_segment(skb, 0);
        kfree_skb(skb);
        if (unlikely(IS_ERR(segs)))