1 files changed, 29 insertions, 0 deletions

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index bed7d43932f6..b56b6a10fe5e 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -205,6 +205,7 @@ struct xfrm_state
          * transformer. */
         const struct xfrm_type  *type;
         struct xfrm_mode        *inner_mode;
+        struct xfrm_mode        *inner_mode_iaf;
         struct xfrm_mode        *outer_mode;
 
         /* Security context */
@@ -388,6 +389,27 @@ enum {
 extern int xfrm_register_mode(struct xfrm_mode *mode, int family);
 extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
 
+static inline int xfrm_af2proto(unsigned int family)
+{
+        switch(family) {
+        case AF_INET:
+                return IPPROTO_IPIP;
+        case AF_INET6:
+                return IPPROTO_IPV6;
+        default:
+                return 0;
+        }
+}
+
+static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
+{
+        if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
+            (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
+                return x->inner_mode;
+        else
+                return x->inner_mode_iaf;
+}
+
 struct xfrm_tmpl
 {
 /* id in template is interpreted as:
@@ -532,6 +554,9 @@ struct xfrm_mode_skb_cb {
         __be16 id;
         __be16 frag_off;
 
+        /* IP header length (excluding options or extension headers). */
+        u8 ihl;
+
         /* TOS for IPv4, class for IPv6. */
         u8 tos;
 
@@ -541,6 +566,9 @@ struct xfrm_mode_skb_cb {
         /* Protocol for IPv4, NH for IPv6. */
         u8 protocol;
 
+        /* Option length for IPv4, zero for IPv6. */
+        u8 optlen;
+
         /* Used by IPv6 only, zero for IPv4. */
         u8 flow_lbl[3];
 };
@@ -1300,6 +1328,7 @@ extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi,
 extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
 extern int xfrm_output_resume(struct sk_buff *skb, int err);
 extern int xfrm_output(struct sk_buff *skb);
+extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
 extern int xfrm4_extract_header(struct sk_buff *skb);
 extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
 extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,