diff --git a/net/ipv4/xfrm4_input.c b/net/ipv4/xfrm4_input.c
index 5e95c8a..c0323d0 100644
--- a/net/ipv4/xfrm4_input.c
+++ b/net/ipv4/xfrm4_input.c
@@ -16,6 +16,11 @@
 #include <net/ip.h>
 #include <net/xfrm.h>
 
+int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb)
+{
+	return xfrm4_extract_header(skb);
+}
+
 #ifdef CONFIG_NETFILTER
 static inline int xfrm4_rcv_encap_finish(struct sk_buff *skb)
 {
@@ -91,7 +96,7 @@
 
 		xfrm_vec[xfrm_nr++] = x;
 
-		if (x->outer_mode->input(x, skb))
+		if (x->inner_mode->input(x, skb))
 			goto drop;
 
 		if (x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL) {
diff --git a/net/ipv4/xfrm4_mode_beet.c b/net/ipv4/xfrm4_mode_beet.c
index 94842ad..e093a7b 100644
--- a/net/ipv4/xfrm4_mode_beet.c
+++ b/net/ipv4/xfrm4_mode_beet.c
@@ -17,6 +17,21 @@
 #include <net/ip.h>
 #include <net/xfrm.h>
 
+static void xfrm4_beet_make_header(struct sk_buff *skb)
+{
+	struct iphdr *iph = ip_hdr(skb);
+
+	iph->ihl = 5;
+	iph->version = 4;
+
+	iph->protocol = XFRM_MODE_SKB_CB(skb)->protocol;
+	iph->tos = XFRM_MODE_SKB_CB(skb)->tos;
+
+	iph->id = XFRM_MODE_SKB_CB(skb)->id;
+	iph->frag_off = XFRM_MODE_SKB_CB(skb)->frag_off;
+	iph->ttl = XFRM_MODE_SKB_CB(skb)->ttl;
+}
+
 /* Add encapsulation header.
  *
  * The top IP header will be constructed per draft-nikander-esp-beet-mode-06.txt.
@@ -40,20 +55,12 @@
 			  offsetof(struct iphdr, protocol);
 	skb->transport_header = skb->network_header + sizeof(*iph);
 
+	xfrm4_beet_make_header(skb);
+
 	ph = (struct ip_beet_phdr *)__skb_pull(skb, sizeof(*iph) - hdrlen);
 
 	top_iph = ip_hdr(skb);
 
-	top_iph->ihl = 5;
-	top_iph->version = 4;
-
-	top_iph->protocol = XFRM_MODE_SKB_CB(skb)->protocol;
-	top_iph->tos = XFRM_MODE_SKB_CB(skb)->tos;
-
-	top_iph->id = XFRM_MODE_SKB_CB(skb)->id;
-	top_iph->frag_off = XFRM_MODE_SKB_CB(skb)->frag_off;
-	top_iph->ttl = XFRM_MODE_SKB_CB(skb)->ttl;
-
 	if (unlikely(optlen)) {
 		BUG_ON(optlen < 0);
 
@@ -75,43 +82,46 @@
 
 static int xfrm4_beet_input(struct xfrm_state *x, struct sk_buff *skb)
 {
-	struct iphdr *iph = ip_hdr(skb);
-	int phlen = 0;
+	struct iphdr *iph;
 	int optlen = 0;
-	u8 ph_nexthdr = 0;
 	int err = -EINVAL;
 
-	if (unlikely(iph->protocol == IPPROTO_BEETPH)) {
+	if (unlikely(XFRM_MODE_SKB_CB(skb)->protocol == IPPROTO_BEETPH)) {
 		struct ip_beet_phdr *ph;
+		int phlen;
 
 		if (!pskb_may_pull(skb, sizeof(*ph)))
 			goto out;
-		ph = (struct ip_beet_phdr *)(ipip_hdr(skb) + 1);
+
+		ph = (struct ip_beet_phdr *)skb->data;
 
 		phlen = sizeof(*ph) + ph->padlen;
 		optlen = ph->hdrlen * 8 + (IPV4_BEET_PHMAXLEN - phlen);
 		if (optlen < 0 || optlen & 3 || optlen > 250)
 			goto out;
 
-		if (!pskb_may_pull(skb, phlen + optlen))
-			goto out;
-		skb->len -= phlen + optlen;
+		XFRM_MODE_SKB_CB(skb)->protocol = ph->nexthdr;
 
-		ph_nexthdr = ph->nexthdr;
+		if (!pskb_may_pull(skb, phlen));
+			goto out;
+		__skb_pull(skb, phlen);
 	}
 
-	skb_set_network_header(skb, phlen - sizeof(*iph));
-	memmove(skb_network_header(skb), iph, sizeof(*iph));
-	skb_set_transport_header(skb, phlen + optlen);
-	skb->data = skb_transport_header(skb);
+	skb_push(skb, sizeof(*iph));
+	skb_reset_network_header(skb);
+
+	memmove(skb->data - skb->mac_len, skb_mac_header(skb),
+		skb->mac_len);
+	skb_set_mac_header(skb, -skb->mac_len);
+
+	xfrm4_beet_make_header(skb);
 
 	iph = ip_hdr(skb);
-	iph->ihl = (sizeof(*iph) + optlen) / 4;
-	iph->tot_len = htons(skb->len + iph->ihl * 4);
+
+	iph->ihl += optlen / 4;
+	iph->tot_len = htons(skb->len);
 	iph->daddr = x->sel.daddr.a4;
 	iph->saddr = x->sel.saddr.a4;
-	if (ph_nexthdr)
-		iph->protocol = ph_nexthdr;
 	iph->check = 0;
 	iph->check = ip_fast_csum(skb_network_header(skb), iph->ihl);
 	err = 0;
@@ -120,7 +130,8 @@
 }
 
 static struct xfrm_mode xfrm4_beet_mode = {
-	.input = xfrm4_beet_input,
+	.input2 = xfrm4_beet_input,
+	.input = xfrm_prepare_input,
 	.output2 = xfrm4_beet_output,
 	.output = xfrm4_prepare_output,
 	.owner = THIS_MODULE,
diff --git a/net/ipv4/xfrm4_mode_tunnel.c b/net/ipv4/xfrm4_mode_tunnel.c
index cc8bbb2..aa335db 100644
--- a/net/ipv4/xfrm4_mode_tunnel.c
+++ b/net/ipv4/xfrm4_mode_tunnel.c
@@ -16,19 +16,12 @@
 
 static inline void ipip_ecn_decapsulate(struct sk_buff *skb)
 {
-	struct iphdr *outer_iph = ip_hdr(skb);
 	struct iphdr *inner_iph = ipip_hdr(skb);
 
-	if (INET_ECN_is_ce(outer_iph->tos))
+	if (INET_ECN_is_ce(XFRM_MODE_SKB_CB(skb)->tos))
 		IP_ECN_set_ce(inner_iph);
 }
 
-static inline void ipip6_ecn_decapsulate(struct iphdr *iph, struct sk_buff *skb)
-{
-	if (INET_ECN_is_ce(iph->tos))
-		IP6_ECN_set_ce(ipv6_hdr(skb));
-}
-
 /* Add encapsulation header.
  *
  * The top IP header will be constructed per RFC 2401.
@@ -72,20 +65,11 @@
 
 static int xfrm4_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
 {
-	struct iphdr *iph = ip_hdr(skb);
 	const unsigned char *old_mac;
 	int err = -EINVAL;
 
-	switch (iph->protocol){
-		case IPPROTO_IPIP:
-			break;
-#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
-		case IPPROTO_IPV6:
-			break;
-#endif
-		default:
-			goto out;
-	}
+	if (XFRM_MODE_SKB_CB(skb)->protocol != IPPROTO_IPIP)
+		goto out;
 
 	if (!pskb_may_pull(skb, sizeof(struct iphdr)))
 		goto out;
@@ -94,20 +78,11 @@
 	    (err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC)))
 		goto out;
 
-	iph = ip_hdr(skb);
-	if (iph->protocol == IPPROTO_IPIP) {
-		if (x->props.flags & XFRM_STATE_DECAP_DSCP)
-			ipv4_copy_dscp(ipv4_get_dsfield(iph), ipip_hdr(skb));
-		if (!(x->props.flags & XFRM_STATE_NOECN))
-			ipip_ecn_decapsulate(skb);
-	}
-#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
-	else {
-		if (!(x->props.flags & XFRM_STATE_NOECN))
-			ipip6_ecn_decapsulate(iph, skb);
-		skb->protocol = htons(ETH_P_IPV6);
-	}
-#endif
+	if (x->props.flags & XFRM_STATE_DECAP_DSCP)
+		ipv4_copy_dscp(XFRM_MODE_SKB_CB(skb)->tos, ipip_hdr(skb));
+	if (!(x->props.flags & XFRM_STATE_NOECN))
+		ipip_ecn_decapsulate(skb);
+
 	old_mac = skb_mac_header(skb);
 	skb_set_mac_header(skb, -skb->mac_len);
 	memmove(skb_mac_header(skb), old_mac, skb->mac_len);
@@ -119,7 +94,8 @@
 }
 
 static struct xfrm_mode xfrm4_tunnel_mode = {
-	.input = xfrm4_tunnel_input,
+	.input2 = xfrm4_tunnel_input,
+	.input = xfrm_prepare_input,
 	.output2 = xfrm4_tunnel_output,
 	.output = xfrm4_prepare_output,
 	.owner = THIS_MODULE,
diff --git a/net/ipv4/xfrm4_state.c b/net/ipv4/xfrm4_state.c
index e6030e7..85f04b7 100644
--- a/net/ipv4/xfrm4_state.c
+++ b/net/ipv4/xfrm4_state.c
@@ -65,10 +65,12 @@
 static struct xfrm_state_afinfo xfrm4_state_afinfo = {
 	.family			= AF_INET,
 	.proto			= IPPROTO_IPIP,
+	.eth_proto		= htons(ETH_P_IP),
 	.owner			= THIS_MODULE,
 	.init_flags		= xfrm4_init_flags,
 	.init_tempsel		= __xfrm4_init_tempsel,
 	.output			= xfrm4_output,
+	.extract_input		= xfrm4_extract_input,
 	.extract_output		= xfrm4_extract_output,
 };