+
+static int xfrm4_output_finish(struct sk_buff *skb)
+{
+ int err;
+
+#ifdef CONFIG_NETFILTER
+ if (!skb->dst->xfrm) {
+ IPCB(skb)->flags |= IPSKB_REROUTED;
+ return dst_output(skb);
+ }
+#endif
+ while (likely((err = xfrm4_output_one(skb)) == 0)) {
+ nf_reset(skb);
+
+ err = nf_hook(PF_INET, NF_IP_LOCAL_OUT, &skb, NULL,
+ skb->dst->dev, dst_output);
+ if (unlikely(err != 1))
+ break;
+
+ if (!skb->dst->xfrm)
+ return dst_output(skb);
+
+ err = nf_hook(PF_INET, NF_IP_POST_ROUTING, &skb, NULL,
+ skb->dst->dev, xfrm4_output_finish);
+ if (unlikely(err != 1))
+ break;
+ }
+
+ return err;
+}
+
+int xfrm4_output(struct sk_buff *skb)
+{
+ return NF_HOOK_COND(PF_INET, NF_IP_POST_ROUTING, skb, NULL, skb->dst->dev,
+ xfrm4_output_finish,
+ !(IPCB(skb)->flags & IPSKB_REROUTED));
+}