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path: root/net/ipv6/xfrm6_output.c
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Diffstat (limited to 'net/ipv6/xfrm6_output.c')
-rw-r--r--net/ipv6/xfrm6_output.c93
1 files changed, 24 insertions, 69 deletions
diff --git a/net/ipv6/xfrm6_output.c b/net/ipv6/xfrm6_output.c
index 656976760ad..b34c58c6565 100644
--- a/net/ipv6/xfrm6_output.c
+++ b/net/ipv6/xfrm6_output.c
@@ -10,10 +10,12 @@
*/
#include <linux/if_ether.h>
-#include <linux/compiler.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/icmpv6.h>
#include <linux/netfilter_ipv6.h>
+#include <net/dst.h>
#include <net/ipv6.h>
#include <net/xfrm.h>
@@ -43,97 +45,50 @@ static int xfrm6_tunnel_check_size(struct sk_buff *skb)
return ret;
}
-static inline int xfrm6_output_one(struct sk_buff *skb)
+int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb)
{
- struct dst_entry *dst = skb->dst;
- struct xfrm_state *x = dst->xfrm;
- struct ipv6hdr *iph;
int err;
- if (x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL) {
- err = xfrm6_tunnel_check_size(skb);
- if (err)
- goto error_nolock;
- }
-
- err = xfrm_output(skb);
+ err = xfrm6_tunnel_check_size(skb);
if (err)
- goto error_nolock;
+ return err;
- iph = ipv6_hdr(skb);
- iph->payload_len = htons(skb->len - sizeof(*iph));
+ XFRM_MODE_SKB_CB(skb)->protocol = ipv6_hdr(skb)->nexthdr;
- IP6CB(skb)->flags |= IP6SKB_XFRM_TRANSFORMED;
- err = 0;
-
-out_exit:
- return err;
-error_nolock:
- kfree_skb(skb);
- goto out_exit;
+ return xfrm6_extract_header(skb);
}
-static int xfrm6_output_finish2(struct sk_buff *skb)
+int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb)
{
int err;
- while (likely((err = xfrm6_output_one(skb)) == 0)) {
- nf_reset(skb);
-
- err = nf_hook(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL,
- skb->dst->dev, dst_output);
- if (unlikely(err != 1))
- break;
+ err = x->inner_mode->afinfo->extract_output(x, skb);
+ if (err)
+ return err;
- if (!skb->dst->xfrm)
- return dst_output(skb);
+ memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));
+#ifdef CONFIG_NETFILTER
+ IP6CB(skb)->flags |= IP6SKB_XFRM_TRANSFORMED;
+#endif
- err = nf_hook(PF_INET6, NF_IP6_POST_ROUTING, skb, NULL,
- skb->dst->dev, xfrm6_output_finish2);
- if (unlikely(err != 1))
- break;
- }
+ skb->protocol = htons(ETH_P_IPV6);
- return err;
+ return x->outer_mode->output2(x, skb);
}
+EXPORT_SYMBOL(xfrm6_prepare_output);
static int xfrm6_output_finish(struct sk_buff *skb)
{
- struct sk_buff *segs;
-
- if (!skb_is_gso(skb))
- return xfrm6_output_finish2(skb);
+#ifdef CONFIG_NETFILTER
+ IP6CB(skb)->flags |= IP6SKB_XFRM_TRANSFORMED;
+#endif
skb->protocol = htons(ETH_P_IPV6);
- segs = skb_gso_segment(skb, 0);
- kfree_skb(skb);
- if (unlikely(IS_ERR(segs)))
- return PTR_ERR(segs);
-
- do {
- struct sk_buff *nskb = segs->next;
- int err;
-
- segs->next = NULL;
- err = xfrm6_output_finish2(segs);
-
- if (unlikely(err)) {
- while ((segs = nskb)) {
- nskb = segs->next;
- segs->next = NULL;
- kfree_skb(segs);
- }
- return err;
- }
-
- segs = nskb;
- } while (segs);
-
- return 0;
+ return xfrm_output(skb);
}
int xfrm6_output(struct sk_buff *skb)
{
- return NF_HOOK(PF_INET6, NF_IP6_POST_ROUTING, skb, NULL, skb->dst->dev,
+ return NF_HOOK(PF_INET6, NF_INET_POST_ROUTING, skb, NULL, skb->dst->dev,
xfrm6_output_finish);
}