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-rw-r--r--include/net/xfrm.h27
-rw-r--r--net/ipv4/xfrm4_input.c7
-rw-r--r--net/ipv4/xfrm4_mode_beet.c67
-rw-r--r--net/ipv4/xfrm4_mode_tunnel.c44
-rw-r--r--net/ipv4/xfrm4_state.c2
-rw-r--r--net/ipv6/xfrm6_input.c7
-rw-r--r--net/ipv6/xfrm6_mode_beet.c36
-rw-r--r--net/ipv6/xfrm6_mode_tunnel.c31
-rw-r--r--net/ipv6/xfrm6_output.c1
-rw-r--r--net/ipv6/xfrm6_state.c5
-rw-r--r--net/xfrm/xfrm_input.c13
11 files changed, 141 insertions, 99 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 138c1868be1d..a9dbe091ae58 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -258,6 +258,7 @@ extern int __xfrm_state_delete(struct xfrm_state *x);
 struct xfrm_state_afinfo {
 	unsigned int		family;
 	unsigned int		proto;
+	unsigned int		eth_proto;
 	struct module		*owner;
 	struct xfrm_type	*type_map[IPPROTO_MAX];
 	struct xfrm_mode	*mode_map[XFRM_MODE_MAX];
@@ -268,6 +269,8 @@ struct xfrm_state_afinfo {
 	int			(*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
 	int			(*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
 	int			(*output)(struct sk_buff *skb);
+	int			(*extract_input)(struct xfrm_state *x,
+						 struct sk_buff *skb);
 	int			(*extract_output)(struct xfrm_state *x,
 						  struct sk_buff *skb);
 };
@@ -302,6 +305,27 @@ extern int xfrm_register_type(struct xfrm_type *type, unsigned short family);
 extern int xfrm_unregister_type(struct xfrm_type *type, unsigned short family);
 
 struct xfrm_mode {
+	/*
+	 * Remove encapsulation header.
+	 *
+	 * The IP header will be moved over the top of the encapsulation
+	 * header.
+	 *
+	 * On entry, the transport header shall point to where the IP header
+	 * should be and the network header shall be set to where the IP
+	 * header currently is.  skb->data shall point to the start of the
+	 * payload.
+	 */
+	int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
+
+	/*
+	 * This is the actual input entry point.
+	 *
+	 * For transport mode and equivalent this would be identical to
+	 * input2 (which does not need to be set).  While tunnel mode
+	 * and equivalent would set this to the tunnel encapsulation function
+	 * xfrm4_prepare_input that would in turn call input2.
+	 */
 	int (*input)(struct xfrm_state *x, struct sk_buff *skb);
 
 	/*
@@ -1093,8 +1117,10 @@ extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq);
 extern void xfrm_replay_notify(struct xfrm_state *x, int event);
 extern int xfrm_state_mtu(struct xfrm_state *x, int mtu);
 extern int xfrm_init_state(struct xfrm_state *x);
+extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
 extern int xfrm_output(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,
 			   int encap_type);
 extern int xfrm4_rcv(struct sk_buff *skb);
@@ -1110,6 +1136,7 @@ extern int xfrm4_output(struct sk_buff *skb);
 extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
 extern int xfrm6_extract_header(struct sk_buff *skb);
+extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
 extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi);
 extern int xfrm6_rcv(struct sk_buff *skb);
 extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
diff --git a/net/ipv4/xfrm4_input.c b/net/ipv4/xfrm4_input.c
index 5e95c8a07efb..c0323d05ab69 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 @@ int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
 
 		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 94842adce144..e093a7b59e18 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 @@ static int xfrm4_beet_output(struct xfrm_state *x, struct sk_buff *skb)
 			  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_output(struct xfrm_state *x, struct sk_buff *skb)
 
 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 @@ out:
 }
 
 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 cc8bbb274e37..aa335dba8ffa 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_output(struct xfrm_state *x, struct sk_buff *skb)
 
 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 @@ static int xfrm4_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
 	    (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 @@ out:
 }
 
 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 e6030e74ff65..85f04b7b237f 100644
--- a/net/ipv4/xfrm4_state.c
+++ b/net/ipv4/xfrm4_state.c
@@ -65,10 +65,12 @@ int xfrm4_extract_header(struct sk_buff *skb)
 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,
 };
 
diff --git a/net/ipv6/xfrm6_input.c b/net/ipv6/xfrm6_input.c
index 515783707e86..c458d0a2e684 100644
--- a/net/ipv6/xfrm6_input.c
+++ b/net/ipv6/xfrm6_input.c
@@ -16,6 +16,11 @@
 #include <net/ipv6.h>
 #include <net/xfrm.h>
 
+int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb)
+{
+	return xfrm6_extract_header(skb);
+}
+
 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
 {
 	int err;
@@ -68,7 +73,7 @@ int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
 
 		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/ipv6/xfrm6_mode_beet.c b/net/ipv6/xfrm6_mode_beet.c
index 4988ed9c76c6..0527d11c1ae3 100644
--- a/net/ipv6/xfrm6_mode_beet.c
+++ b/net/ipv6/xfrm6_mode_beet.c
@@ -19,6 +19,20 @@
 #include <net/ipv6.h>
 #include <net/xfrm.h>
 
+static void xfrm6_beet_make_header(struct sk_buff *skb)
+{
+	struct ipv6hdr *iph = ipv6_hdr(skb);
+
+	iph->version = 6;
+
+	memcpy(iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl,
+	       sizeof(iph->flow_lbl));
+	iph->nexthdr = XFRM_MODE_SKB_CB(skb)->protocol;
+
+	ipv6_change_dsfield(iph, 0, XFRM_MODE_SKB_CB(skb)->tos);
+	iph->hop_limit = XFRM_MODE_SKB_CB(skb)->ttl;
+}
+
 /* Add encapsulation header.
  *
  * The top IP header will be constructed per draft-nikander-esp-beet-mode-06.txt.
@@ -31,16 +45,11 @@ static int xfrm6_beet_output(struct xfrm_state *x, struct sk_buff *skb)
 	skb->mac_header = skb->network_header +
 			  offsetof(struct ipv6hdr, nexthdr);
 	skb->transport_header = skb->network_header + sizeof(*top_iph);
-	top_iph = ipv6_hdr(skb);
 
-	top_iph->version = 6;
+	xfrm6_beet_make_header(skb);
 
-	memcpy(top_iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl,
-	       sizeof(top_iph->flow_lbl));
-	top_iph->nexthdr = XFRM_MODE_SKB_CB(skb)->protocol;
+	top_iph = ipv6_hdr(skb);
 
-	ipv6_change_dsfield(top_iph, 0, XFRM_MODE_SKB_CB(skb)->tos);
-	top_iph->hop_limit = XFRM_MODE_SKB_CB(skb)->ttl;
 	ipv6_addr_copy(&top_iph->saddr, (struct in6_addr *)&x->props.saddr);
 	ipv6_addr_copy(&top_iph->daddr, (struct in6_addr *)&x->id.daddr);
 	return 0;
@@ -51,19 +60,21 @@ static int xfrm6_beet_input(struct xfrm_state *x, struct sk_buff *skb)
 	struct ipv6hdr *ip6h;
 	const unsigned char *old_mac;
 	int size = sizeof(struct ipv6hdr);
-	int err = -EINVAL;
+	int err;
 
-	if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
+	err = skb_cow_head(skb, size + skb->mac_len);
+	if (err)
 		goto out;
 
-	skb_push(skb, size);
-	memmove(skb->data, skb_network_header(skb), size);
+	__skb_push(skb, size);
 	skb_reset_network_header(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);
 
+	xfrm6_beet_make_header(skb);
+
 	ip6h = ipv6_hdr(skb);
 	ip6h->payload_len = htons(skb->len - size);
 	ipv6_addr_copy(&ip6h->daddr, (struct in6_addr *) &x->sel.daddr.a6);
@@ -74,7 +85,8 @@ out:
 }
 
 static struct xfrm_mode xfrm6_beet_mode = {
-	.input = xfrm6_beet_input,
+	.input2 = xfrm6_beet_input,
+	.input = xfrm_prepare_input,
 	.output2 = xfrm6_beet_output,
 	.output = xfrm6_prepare_output,
 	.owner = THIS_MODULE,
diff --git a/net/ipv6/xfrm6_mode_tunnel.c b/net/ipv6/xfrm6_mode_tunnel.c
index d45ce5d44197..f7d0d6612650 100644
--- a/net/ipv6/xfrm6_mode_tunnel.c
+++ b/net/ipv6/xfrm6_mode_tunnel.c
@@ -25,12 +25,6 @@ static inline void ipip6_ecn_decapsulate(struct sk_buff *skb)
 		IP6_ECN_set_ce(inner_iph);
 }
 
-static inline void ip6ip_ecn_decapsulate(struct sk_buff *skb)
-{
-	if (INET_ECN_is_ce(ipv6_get_dsfield(ipv6_hdr(skb))))
-			IP_ECN_set_ce(ipip_hdr(skb));
-}
-
 /* Add encapsulation header.
  *
  * The top IP header will be constructed per RFC 2401.
@@ -68,10 +62,8 @@ static int xfrm6_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
 {
 	int err = -EINVAL;
 	const unsigned char *old_mac;
-	const unsigned char *nh = skb_network_header(skb);
 
-	if (nh[IP6CB(skb)->nhoff] != IPPROTO_IPV6 &&
-	    nh[IP6CB(skb)->nhoff] != IPPROTO_IPIP)
+	if (XFRM_MODE_SKB_CB(skb)->protocol != IPPROTO_IPV6)
 		goto out;
 	if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
 		goto out;
@@ -80,18 +72,12 @@ static int xfrm6_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
 	    (err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC)))
 		goto out;
 
-	nh = skb_network_header(skb);
-	if (nh[IP6CB(skb)->nhoff] == IPPROTO_IPV6) {
-		if (x->props.flags & XFRM_STATE_DECAP_DSCP)
-			ipv6_copy_dscp(ipv6_get_dsfield(ipv6_hdr(skb)),
-				       ipipv6_hdr(skb));
-		if (!(x->props.flags & XFRM_STATE_NOECN))
-			ipip6_ecn_decapsulate(skb);
-	} else {
-		if (!(x->props.flags & XFRM_STATE_NOECN))
-			ip6ip_ecn_decapsulate(skb);
-		skb->protocol = htons(ETH_P_IP);
-	}
+	if (x->props.flags & XFRM_STATE_DECAP_DSCP)
+		ipv6_copy_dscp(ipv6_get_dsfield(ipv6_hdr(skb)),
+			       ipipv6_hdr(skb));
+	if (!(x->props.flags & XFRM_STATE_NOECN))
+		ipip6_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);
@@ -103,7 +89,8 @@ out:
 }
 
 static struct xfrm_mode xfrm6_tunnel_mode = {
-	.input = xfrm6_tunnel_input,
+	.input2 = xfrm6_tunnel_input,
+	.input = xfrm_prepare_input,
 	.output2 = xfrm6_tunnel_output,
 	.output = xfrm6_prepare_output,
 	.owner = THIS_MODULE,
diff --git a/net/ipv6/xfrm6_output.c b/net/ipv6/xfrm6_output.c
index bc2e80e3b0b1..c45050cfe72b 100644
--- a/net/ipv6/xfrm6_output.c
+++ b/net/ipv6/xfrm6_output.c
@@ -53,6 +53,7 @@ int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb)
 	if (err)
 		return err;
 
+	IP6CB(skb)->nhoff = offsetof(struct ipv6hdr, nexthdr);
 	return xfrm6_extract_header(skb);
 }
 
diff --git a/net/ipv6/xfrm6_state.c b/net/ipv6/xfrm6_state.c
index 98b05f472322..90fef0a4726f 100644
--- a/net/ipv6/xfrm6_state.c
+++ b/net/ipv6/xfrm6_state.c
@@ -177,7 +177,8 @@ int xfrm6_extract_header(struct sk_buff *skb)
 	XFRM_MODE_SKB_CB(skb)->frag_off = htons(IP_DF);
 	XFRM_MODE_SKB_CB(skb)->tos = ipv6_get_dsfield(iph);
 	XFRM_MODE_SKB_CB(skb)->ttl = iph->hop_limit;
-	XFRM_MODE_SKB_CB(skb)->protocol = iph->nexthdr;
+	XFRM_MODE_SKB_CB(skb)->protocol =
+		skb_network_header(skb)[IP6CB(skb)->nhoff];
 	memcpy(XFRM_MODE_SKB_CB(skb)->flow_lbl, iph->flow_lbl,
 	       sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
 
@@ -187,11 +188,13 @@ int xfrm6_extract_header(struct sk_buff *skb)
 static struct xfrm_state_afinfo xfrm6_state_afinfo = {
 	.family			= AF_INET6,
 	.proto			= IPPROTO_IPV6,
+	.eth_proto		= htons(ETH_P_IPV6),
 	.owner			= THIS_MODULE,
 	.init_tempsel		= __xfrm6_init_tempsel,
 	.tmpl_sort		= __xfrm6_tmpl_sort,
 	.state_sort		= __xfrm6_state_sort,
 	.output			= xfrm6_output,
+	.extract_input		= xfrm6_extract_input,
 	.extract_output		= xfrm6_extract_output,
 };
 
diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c
index cb97fda1b6df..4c803f7e74e5 100644
--- a/net/xfrm/xfrm_input.c
+++ b/net/xfrm/xfrm_input.c
@@ -81,6 +81,19 @@ int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq)
 }
 EXPORT_SYMBOL(xfrm_parse_spi);
 
+int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb)
+{
+	int err;
+
+	err = x->outer_mode->afinfo->extract_input(x, skb);
+	if (err)
+		return err;
+
+	skb->protocol = x->inner_mode->afinfo->eth_proto;
+	return x->inner_mode->input2(x, skb);
+}
+EXPORT_SYMBOL(xfrm_prepare_input);
+
 void __init xfrm_input_init(void)
 {
 	secpath_cachep = kmem_cache_create("secpath_cache",
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-09-29 22:39:11 +0000