Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

2 files changed, 2908 insertions, 0 deletions

diff --git a/net/key/Makefile b/net/key/Makefile
new file mode 100644
index 00000000000..85760804247
--- /dev/null
+++ b/net/key/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for the key AF.
+#
+
+obj-$(CONFIG_NET_KEY) += af_key.o
diff --git a/net/key/af_key.c b/net/key/af_key.c
new file mode 100644
index 00000000000..ce980aa94ed
--- /dev/null
+++ b/net/key/af_key.c
@@ -0,0 +1,2903 @@
+/*
+ * net/key/af_key.c	An implementation of PF_KEYv2 sockets.
+ *
+ *		This program is free software; you can redistribute it and/or
+ *		modify it under the terms of the GNU General Public License
+ *		as published by the Free Software Foundation; either version
+ *		2 of the License, or (at your option) any later version.
+ *
+ * Authors:	Maxim Giryaev	<gem@asplinux.ru>
+ *		David S. Miller	<davem@redhat.com>
+ *		Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
+ *		Kunihiro Ishiguro <kunihiro@ipinfusion.com>
+ *		Kazunori MIYAZAWA / USAGI Project <miyazawa@linux-ipv6.org>
+ *		Derek Atkins <derek@ihtfp.com>
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/socket.h>
+#include <linux/pfkeyv2.h>
+#include <linux/ipsec.h>
+#include <linux/skbuff.h>
+#include <linux/rtnetlink.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/proc_fs.h>
+#include <linux/init.h>
+#include <net/xfrm.h>
+
+#include <net/sock.h>
+
+#define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
+#define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))
+
+
+/* List of all pfkey sockets. */
+static HLIST_HEAD(pfkey_table);
+static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait);
+static DEFINE_RWLOCK(pfkey_table_lock);
+static atomic_t pfkey_table_users = ATOMIC_INIT(0);
+
+static atomic_t pfkey_socks_nr = ATOMIC_INIT(0);
+
+struct pfkey_sock {
+	/* struct sock must be the first member of struct pfkey_sock */
+	struct sock	sk;
+	int		registered;
+	int		promisc;
+};
+
+static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
+{
+	return (struct pfkey_sock *)sk;
+}
+
+static void pfkey_sock_destruct(struct sock *sk)
+{
+	skb_queue_purge(&sk->sk_receive_queue);
+
+	if (!sock_flag(sk, SOCK_DEAD)) {
+		printk("Attempt to release alive pfkey socket: %p\n", sk);
+		return;
+	}
+
+	BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
+	BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
+
+	atomic_dec(&pfkey_socks_nr);
+}
+
+static void pfkey_table_grab(void)
+{
+	write_lock_bh(&pfkey_table_lock);
+
+	if (atomic_read(&pfkey_table_users)) {
+		DECLARE_WAITQUEUE(wait, current);
+
+		add_wait_queue_exclusive(&pfkey_table_wait, &wait);
+		for(;;) {
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			if (atomic_read(&pfkey_table_users) == 0)
+				break;
+			write_unlock_bh(&pfkey_table_lock);
+			schedule();
+			write_lock_bh(&pfkey_table_lock);
+		}
+
+		__set_current_state(TASK_RUNNING);
+		remove_wait_queue(&pfkey_table_wait, &wait);
+	}
+}
+
+static __inline__ void pfkey_table_ungrab(void)
+{
+	write_unlock_bh(&pfkey_table_lock);
+	wake_up(&pfkey_table_wait);
+}
+
+static __inline__ void pfkey_lock_table(void)
+{
+	/* read_lock() synchronizes us to pfkey_table_grab */
+
+	read_lock(&pfkey_table_lock);
+	atomic_inc(&pfkey_table_users);
+	read_unlock(&pfkey_table_lock);
+}
+
+static __inline__ void pfkey_unlock_table(void)
+{
+	if (atomic_dec_and_test(&pfkey_table_users))
+		wake_up(&pfkey_table_wait);
+}
+
+
+static struct proto_ops pfkey_ops;
+
+static void pfkey_insert(struct sock *sk)
+{
+	pfkey_table_grab();
+	sk_add_node(sk, &pfkey_table);
+	pfkey_table_ungrab();
+}
+
+static void pfkey_remove(struct sock *sk)
+{
+	pfkey_table_grab();
+	sk_del_node_init(sk);
+	pfkey_table_ungrab();
+}
+
+static struct proto key_proto = {
+	.name	  = "KEY",
+	.owner	  = THIS_MODULE,
+	.obj_size = sizeof(struct pfkey_sock),
+};
+
+static int pfkey_create(struct socket *sock, int protocol)
+{
+	struct sock *sk;
+	int err;
+
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+	if (sock->type != SOCK_RAW)
+		return -ESOCKTNOSUPPORT;
+	if (protocol != PF_KEY_V2)
+		return -EPROTONOSUPPORT;
+
+	err = -ENOMEM;
+	sk = sk_alloc(PF_KEY, GFP_KERNEL, &key_proto, 1);
+	if (sk == NULL)
+		goto out;
+	
+	sock->ops = &pfkey_ops;
+	sock_init_data(sock, sk);
+
+	sk->sk_family = PF_KEY;
+	sk->sk_destruct = pfkey_sock_destruct;
+
+	atomic_inc(&pfkey_socks_nr);
+
+	pfkey_insert(sk);
+
+	return 0;
+out:
+	return err;
+}
+
+static int pfkey_release(struct socket *sock)
+{
+	struct sock *sk = sock->sk;
+
+	if (!sk)
+		return 0;
+
+	pfkey_remove(sk);
+
+	sock_orphan(sk);
+	sock->sk = NULL;
+	skb_queue_purge(&sk->sk_write_queue);
+	sock_put(sk);
+
+	return 0;
+}
+
+static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
+			       int allocation, struct sock *sk)
+{
+	int err = -ENOBUFS;
+
+	sock_hold(sk);
+	if (*skb2 == NULL) {
+		if (atomic_read(&skb->users) != 1) {
+			*skb2 = skb_clone(skb, allocation);
+		} else {
+			*skb2 = skb;
+			atomic_inc(&skb->users);
+		}
+	}
+	if (*skb2 != NULL) {
+		if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
+			skb_orphan(*skb2);
+			skb_set_owner_r(*skb2, sk);
+			skb_queue_tail(&sk->sk_receive_queue, *skb2);
+			sk->sk_data_ready(sk, (*skb2)->len);
+			*skb2 = NULL;
+			err = 0;
+		}
+	}
+	sock_put(sk);
+	return err;
+}
+
+/* Send SKB to all pfkey sockets matching selected criteria.  */
+#define BROADCAST_ALL		0
+#define BROADCAST_ONE		1
+#define BROADCAST_REGISTERED	2
+#define BROADCAST_PROMISC_ONLY	4
+static int pfkey_broadcast(struct sk_buff *skb, int allocation,
+			   int broadcast_flags, struct sock *one_sk)
+{
+	struct sock *sk;
+	struct hlist_node *node;
+	struct sk_buff *skb2 = NULL;
+	int err = -ESRCH;
+
+	/* XXX Do we need something like netlink_overrun?  I think
+	 * XXX PF_KEY socket apps will not mind current behavior.
+	 */
+	if (!skb)
+		return -ENOMEM;
+
+	pfkey_lock_table();
+	sk_for_each(sk, node, &pfkey_table) {
+		struct pfkey_sock *pfk = pfkey_sk(sk);
+		int err2;
+
+		/* Yes, it means that if you are meant to receive this
+		 * pfkey message you receive it twice as promiscuous
+		 * socket.
+		 */
+		if (pfk->promisc)
+			pfkey_broadcast_one(skb, &skb2, allocation, sk);
+
+		/* the exact target will be processed later */
+		if (sk == one_sk)
+			continue;
+		if (broadcast_flags != BROADCAST_ALL) {
+			if (broadcast_flags & BROADCAST_PROMISC_ONLY)
+				continue;
+			if ((broadcast_flags & BROADCAST_REGISTERED) &&
+			    !pfk->registered)
+				continue;
+			if (broadcast_flags & BROADCAST_ONE)
+				continue;
+		}
+
+		err2 = pfkey_broadcast_one(skb, &skb2, allocation, sk);
+
+		/* Error is cleare after succecful sending to at least one
+		 * registered KM */
+		if ((broadcast_flags & BROADCAST_REGISTERED) && err)
+			err = err2;
+	}
+	pfkey_unlock_table();
+
+	if (one_sk != NULL)
+		err = pfkey_broadcast_one(skb, &skb2, allocation, one_sk);
+
+	if (skb2)
+		kfree_skb(skb2);
+	kfree_skb(skb);
+	return err;
+}
+
+static inline void pfkey_hdr_dup(struct sadb_msg *new, struct sadb_msg *orig)
+{
+	*new = *orig;
+}
+
+static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
+{
+	struct sk_buff *skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
+	struct sadb_msg *hdr;
+
+	if (!skb)
+		return -ENOBUFS;
+
+	/* Woe be to the platform trying to support PFKEY yet
+	 * having normal errnos outside the 1-255 range, inclusive.
+	 */
+	err = -err;
+	if (err == ERESTARTSYS ||
+	    err == ERESTARTNOHAND ||
+	    err == ERESTARTNOINTR)
+		err = EINTR;
+	if (err >= 512)
+		err = EINVAL;
+	if (err <= 0 || err >= 256)
+		BUG();
+
+	hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
+	pfkey_hdr_dup(hdr, orig);
+	hdr->sadb_msg_errno = (uint8_t) err;
+	hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
+			     sizeof(uint64_t));
+
+	pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
+
+	return 0;
+}
+
+static u8 sadb_ext_min_len[] = {
+	[SADB_EXT_RESERVED]		= (u8) 0,
+	[SADB_EXT_SA]			= (u8) sizeof(struct sadb_sa),
+	[SADB_EXT_LIFETIME_CURRENT]	= (u8) sizeof(struct sadb_lifetime),
+	[SADB_EXT_LIFETIME_HARD]	= (u8) sizeof(struct sadb_lifetime),
+	[SADB_EXT_LIFETIME_SOFT]	= (u8) sizeof(struct sadb_lifetime),
+	[SADB_EXT_ADDRESS_SRC]		= (u8) sizeof(struct sadb_address),
+	[SADB_EXT_ADDRESS_DST]		= (u8) sizeof(struct sadb_address),
+	[SADB_EXT_ADDRESS_PROXY]	= (u8) sizeof(struct sadb_address),
+	[SADB_EXT_KEY_AUTH]		= (u8) sizeof(struct sadb_key),
+	[SADB_EXT_KEY_ENCRYPT]		= (u8) sizeof(struct sadb_key),
+	[SADB_EXT_IDENTITY_SRC]		= (u8) sizeof(struct sadb_ident),
+	[SADB_EXT_IDENTITY_DST]		= (u8) sizeof(struct sadb_ident),
+	[SADB_EXT_SENSITIVITY]		= (u8) sizeof(struct sadb_sens),
+	[SADB_EXT_PROPOSAL]		= (u8) sizeof(struct sadb_prop),
+	[SADB_EXT_SUPPORTED_AUTH]	= (u8) sizeof(struct sadb_supported),
+	[SADB_EXT_SUPPORTED_ENCRYPT]	= (u8) sizeof(struct sadb_supported),
+	[SADB_EXT_SPIRANGE]		= (u8) sizeof(struct sadb_spirange),
+	[SADB_X_EXT_KMPRIVATE]		= (u8) sizeof(struct sadb_x_kmprivate),
+	[SADB_X_EXT_POLICY]		= (u8) sizeof(struct sadb_x_policy),
+	[SADB_X_EXT_SA2]		= (u8) sizeof(struct sadb_x_sa2),
+	[SADB_X_EXT_NAT_T_TYPE]		= (u8) sizeof(struct sadb_x_nat_t_type),
+	[SADB_X_EXT_NAT_T_SPORT]	= (u8) sizeof(struct sadb_x_nat_t_port),
+	[SADB_X_EXT_NAT_T_DPORT]	= (u8) sizeof(struct sadb_x_nat_t_port),
+	[SADB_X_EXT_NAT_T_OA]		= (u8) sizeof(struct sadb_address),
+};
+
+/* Verify sadb_address_{len,prefixlen} against sa_family.  */
+static int verify_address_len(void *p)
+{
+	struct sadb_address *sp = p;
+	struct sockaddr *addr = (struct sockaddr *)(sp + 1);
+	struct sockaddr_in *sin;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	struct sockaddr_in6 *sin6;
+#endif
+	int len;
+
+	switch (addr->sa_family) {
+	case AF_INET:
+		len  = sizeof(*sp) + sizeof(*sin) + (sizeof(uint64_t) - 1);
+		len /= sizeof(uint64_t);
+		if (sp->sadb_address_len != len ||
+		    sp->sadb_address_prefixlen > 32)
+			return -EINVAL;
+		break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	case AF_INET6:
+		len  = sizeof(*sp) + sizeof(*sin6) + (sizeof(uint64_t) - 1);
+		len /= sizeof(uint64_t);
+		if (sp->sadb_address_len != len ||
+		    sp->sadb_address_prefixlen > 128)
+			return -EINVAL;
+		break;
+#endif
+	default:
+		/* It is user using kernel to keep track of security
+		 * associations for another protocol, such as
+		 * OSPF/RSVP/RIPV2/MIP.  It is user's job to verify
+		 * lengths.
+		 *
+		 * XXX Actually, association/policy database is not yet
+		 * XXX able to cope with arbitrary sockaddr families.
+		 * XXX When it can, remove this -EINVAL.  -DaveM
+		 */
+		return -EINVAL;
+		break;
+	};
+
+	return 0;
+}
+
+static int present_and_same_family(struct sadb_address *src,
+				   struct sadb_address *dst)
+{
+	struct sockaddr *s_addr, *d_addr;
+
+	if (!src || !dst)
+		return 0;
+
+	s_addr = (struct sockaddr *)(src + 1);
+	d_addr = (struct sockaddr *)(dst + 1);
+	if (s_addr->sa_family != d_addr->sa_family)
+		return 0;
+	if (s_addr->sa_family != AF_INET
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	    && s_addr->sa_family != AF_INET6
+#endif
+		)
+		return 0;
+
+	return 1;
+}
+
+static int parse_exthdrs(struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+	char *p = (char *) hdr;
+	int len = skb->len;
+
+	len -= sizeof(*hdr);
+	p += sizeof(*hdr);
+	while (len > 0) {
+		struct sadb_ext *ehdr = (struct sadb_ext *) p;
+		uint16_t ext_type;
+		int ext_len;
+
+		ext_len  = ehdr->sadb_ext_len;
+		ext_len *= sizeof(uint64_t);
+		ext_type = ehdr->sadb_ext_type;
+		if (ext_len < sizeof(uint64_t) ||
+		    ext_len > len ||
+		    ext_type == SADB_EXT_RESERVED)
+			return -EINVAL;
+
+		if (ext_type <= SADB_EXT_MAX) {
+			int min = (int) sadb_ext_min_len[ext_type];
+			if (ext_len < min)
+				return -EINVAL;
+			if (ext_hdrs[ext_type-1] != NULL)
+				return -EINVAL;
+			if (ext_type == SADB_EXT_ADDRESS_SRC ||
+			    ext_type == SADB_EXT_ADDRESS_DST ||
+			    ext_type == SADB_EXT_ADDRESS_PROXY ||
+			    ext_type == SADB_X_EXT_NAT_T_OA) {
+				if (verify_address_len(p))
+					return -EINVAL;
+			}				
+			ext_hdrs[ext_type-1] = p;
+		}
+		p   += ext_len;
+		len -= ext_len;
+	}
+
+	return 0;
+}
+
+static uint16_t
+pfkey_satype2proto(uint8_t satype)
+{
+	switch (satype) {
+	case SADB_SATYPE_UNSPEC:
+		return IPSEC_PROTO_ANY;
+	case SADB_SATYPE_AH:
+		return IPPROTO_AH;
+	case SADB_SATYPE_ESP:
+		return IPPROTO_ESP;
+	case SADB_X_SATYPE_IPCOMP:
+		return IPPROTO_COMP;
+		break;
+	default:
+		return 0;
+	}
+	/* NOTREACHED */
+}
+
+static uint8_t
+pfkey_proto2satype(uint16_t proto)
+{
+	switch (proto) {
+	case IPPROTO_AH:
+		return SADB_SATYPE_AH;
+	case IPPROTO_ESP:
+		return SADB_SATYPE_ESP;
+	case IPPROTO_COMP:
+		return SADB_X_SATYPE_IPCOMP;
+		break;
+	default:
+		return 0;
+	}
+	/* NOTREACHED */
+}
+
+/* BTW, this scheme means that there is no way with PFKEY2 sockets to
+ * say specifically 'just raw sockets' as we encode them as 255.
+ */
+
+static uint8_t pfkey_proto_to_xfrm(uint8_t proto)
+{
+	return (proto == IPSEC_PROTO_ANY ? 0 : proto);
+}
+
+static uint8_t pfkey_proto_from_xfrm(uint8_t proto)
+{
+	return (proto ? proto : IPSEC_PROTO_ANY);
+}
+
+static int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr,
+				     xfrm_address_t *xaddr)
+{
+	switch (((struct sockaddr*)(addr + 1))->sa_family) {
+	case AF_INET:
+		xaddr->a4 = 
+			((struct sockaddr_in *)(addr + 1))->sin_addr.s_addr;
+		return AF_INET;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	case AF_INET6:
+		memcpy(xaddr->a6, 
+		       &((struct sockaddr_in6 *)(addr + 1))->sin6_addr,
+		       sizeof(struct in6_addr));
+		return AF_INET6;
+#endif
+	default:
+		return 0;
+	}
+	/* NOTREACHED */
+}
+
+static struct  xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
+{
+	struct sadb_sa *sa;
+	struct sadb_address *addr;
+	uint16_t proto;
+	unsigned short family;
+	xfrm_address_t *xaddr;
+
+	sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
+	if (sa == NULL)
+		return NULL;
+
+	proto = pfkey_satype2proto(hdr->sadb_msg_satype);
+	if (proto == 0)
+		return NULL;
+
+	/* sadb_address_len should be checked by caller */
+	addr = (struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1];
+	if (addr == NULL)
+		return NULL;
+
+	family = ((struct sockaddr *)(addr + 1))->sa_family;
+	switch (family) {
+	case AF_INET:
+		xaddr = (xfrm_address_t *)&((struct sockaddr_in *)(addr + 1))->sin_addr;
+		break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	case AF_INET6:
+		xaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(addr + 1))->sin6_addr;
+		break;
+#endif
+	default:
+		xaddr = NULL;
+	}
+
+	if (!xaddr)
+		return NULL;
+
+	return xfrm_state_lookup(xaddr, sa->sadb_sa_spi, proto, family);
+}
+
+#define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
+static int
+pfkey_sockaddr_size(sa_family_t family)
+{
+	switch (family) {
+	case AF_INET:
+		return PFKEY_ALIGN8(sizeof(struct sockaddr_in));
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	case AF_INET6:
+		return PFKEY_ALIGN8(sizeof(struct sockaddr_in6));
+#endif
+	default:
+		return 0;
+	}
+	/* NOTREACHED */
+}
+
+static struct sk_buff * pfkey_xfrm_state2msg(struct xfrm_state *x, int add_keys, int hsc)
+{
+	struct sk_buff *skb;
+	struct sadb_msg *hdr;
+	struct sadb_sa *sa;
+	struct sadb_lifetime *lifetime;
+	struct sadb_address *addr;
+	struct sadb_key *key;
+	struct sadb_x_sa2 *sa2;
+	struct sockaddr_in *sin;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	struct sockaddr_in6 *sin6;
+#endif
+	int size;
+	int auth_key_size = 0;
+	int encrypt_key_size = 0;
+	int sockaddr_size;
+	struct xfrm_encap_tmpl *natt = NULL;
+
+	/* address family check */
+	sockaddr_size = pfkey_sockaddr_size(x->props.family);
+	if (!sockaddr_size)
+		return ERR_PTR(-EINVAL);
+
+	/* base, SA, (lifetime (HSC),) address(SD), (address(P),)
+	   key(AE), (identity(SD),) (sensitivity)> */
+	size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) + 
+		sizeof(struct sadb_lifetime) +
+		((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
+		((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
+			sizeof(struct sadb_address)*2 + 
+				sockaddr_size*2 +
+					sizeof(struct sadb_x_sa2);
+	/* identity & sensitivity */
+
+	if ((x->props.family == AF_INET &&
+	     x->sel.saddr.a4 != x->props.saddr.a4)
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	    || (x->props.family == AF_INET6 &&
+		memcmp (x->sel.saddr.a6, x->props.saddr.a6, sizeof (struct in6_addr)))
+#endif
+		)
+		size += sizeof(struct sadb_address) + sockaddr_size;
+
+	if (add_keys) {
+		if (x->aalg && x->aalg->alg_key_len) {
+			auth_key_size = 
+				PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8); 
+			size += sizeof(struct sadb_key) + auth_key_size;
+		}
+		if (x->ealg && x->ealg->alg_key_len) {
+			encrypt_key_size = 
+				PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8); 
+			size += sizeof(struct sadb_key) + encrypt_key_size;
+		}
+	}
+	if (x->encap)
+		natt = x->encap;
+
+	if (natt && natt->encap_type) {
+		size += sizeof(struct sadb_x_nat_t_type);
+		size += sizeof(struct sadb_x_nat_t_port);
+		size += sizeof(struct sadb_x_nat_t_port);
+	}
+
+	skb =  alloc_skb(size + 16, GFP_ATOMIC);
+	if (skb == NULL)
+		return ERR_PTR(-ENOBUFS);
+
+	/* call should fill header later */
+	hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
+	memset(hdr, 0, size);	/* XXX do we need this ? */
+	hdr->sadb_msg_len = size / sizeof(uint64_t);
+
+	/* sa */
+	sa = (struct sadb_sa *)  skb_put(skb, sizeof(struct sadb_sa));
+	sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
+	sa->sadb_sa_exttype = SADB_EXT_SA;
+	sa->sadb_sa_spi = x->id.spi;
+	sa->sadb_sa_replay = x->props.replay_window;
+	sa->sadb_sa_state = SADB_SASTATE_DYING;
+	if (x->km.state == XFRM_STATE_VALID && !x->km.dying)
+		sa->sadb_sa_state = SADB_SASTATE_MATURE;
+	else if (x->km.state == XFRM_STATE_ACQ)
+		sa->sadb_sa_state = SADB_SASTATE_LARVAL;
+	else if (x->km.state == XFRM_STATE_EXPIRED)
+		sa->sadb_sa_state = SADB_SASTATE_DEAD;
+	sa->sadb_sa_auth = 0;
+	if (x->aalg) {
+		struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
+		sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;
+	}
+	sa->sadb_sa_encrypt = 0;
+	BUG_ON(x->ealg && x->calg);
+	if (x->ealg) {
+		struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);
+		sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
+	}
+	/* KAME compatible: sadb_sa_encrypt is overloaded with calg id */
+	if (x->calg) {
+		struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);
+		sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;
+	}
+
+	sa->sadb_sa_flags = 0;
+	if (x->props.flags & XFRM_STATE_NOECN)
+		sa->sadb_sa_flags |= SADB_SAFLAGS_NOECN;
+	if (x->props.flags & XFRM_STATE_DECAP_DSCP)
+		sa->sadb_sa_flags |= SADB_SAFLAGS_DECAP_DSCP;
+
+	/* hard time */
+	if (hsc & 2) {
+		lifetime = (struct sadb_lifetime *)  skb_put(skb, 
+							     sizeof(struct sadb_lifetime));
+		lifetime->sadb_lifetime_len =
+			sizeof(struct sadb_lifetime)/sizeof(uint64_t);
+		lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
+		lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.hard_packet_limit);
+		lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
+		lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
+		lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
+	}
+	/* soft time */
+	if (hsc & 1) {
+		lifetime = (struct sadb_lifetime *)  skb_put(skb, 
+							     sizeof(struct sadb_lifetime));
+		lifetime->sadb_lifetime_len =
+			sizeof(struct sadb_lifetime)/sizeof(uint64_t);
+		lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
+		lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.soft_packet_limit);
+		lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
+		lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
+		lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
+	}
+	/* current time */
+	lifetime = (struct sadb_lifetime *)  skb_put(skb,
+						     sizeof(struct sadb_lifetime));
+	lifetime->sadb_lifetime_len =
+		sizeof(struct sadb_lifetime)/sizeof(uint64_t);
+	lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
+	lifetime->sadb_lifetime_allocations = x->curlft.packets;
+	lifetime->sadb_lifetime_bytes = x->curlft.bytes;
+	lifetime->sadb_lifetime_addtime = x->curlft.add_time;
+	lifetime->sadb_lifetime_usetime = x->curlft.use_time;
+	/* src address */
+	addr = (struct sadb_address*) skb_put(skb, 
+					      sizeof(struct sadb_address)+sockaddr_size);
+	addr->sadb_address_len = 
+		(sizeof(struct sadb_address)+sockaddr_size)/
+			sizeof(uint64_t);
+	addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
+	/* "if the ports are non-zero, then the sadb_address_proto field, 
+	   normally zero, MUST be filled in with the transport 
+	   protocol's number." - RFC2367 */
+	addr->sadb_address_proto = 0; 
+	addr->sadb_address_reserved = 0;
+	if (x->props.family == AF_INET) {
+		addr->sadb_address_prefixlen = 32;
+
+		sin = (struct sockaddr_in *) (addr + 1);
+		sin->sin_family = AF_INET;
+		sin->sin_addr.s_addr = x->props.saddr.a4;
+		sin->sin_port = 0;
+		memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+	}
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	else if (x->props.family == AF_INET6) {
+ 		addr->sadb_address_prefixlen = 128;
+
+		sin6 = (struct sockaddr_in6 *) (addr + 1);
+		sin6->sin6_family = AF_INET6;
+		sin6->sin6_port = 0;
+		sin6->sin6_flowinfo = 0;
+ 		memcpy(&sin6->sin6_addr, x->props.saddr.a6,
+		       sizeof(struct in6_addr));
+		sin6->sin6_scope_id = 0;
+ 	}
+#endif
+	else
+		BUG();
+
+	/* dst address */
+	addr = (struct sadb_address*) skb_put(skb, 
+					      sizeof(struct sadb_address)+sockaddr_size);
+	addr->sadb_address_len = 
+		(sizeof(struct sadb_address)+sockaddr_size)/
+			sizeof(uint64_t);
+	addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
+	addr->sadb_address_proto = 0; 
+	addr->sadb_address_prefixlen = 32; /* XXX */ 
+	addr->sadb_address_reserved = 0;
+	if (x->props.family == AF_INET) {
+		sin = (struct sockaddr_in *) (addr + 1);
+		sin->sin_family = AF_INET;
+		sin->sin_addr.s_addr = x->id.daddr.a4;
+		sin->sin_port = 0;
+		memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+
+		if (x->sel.saddr.a4 != x->props.saddr.a4) {
+			addr = (struct sadb_address*) skb_put(skb, 
+				sizeof(struct sadb_address)+sockaddr_size);
+			addr->sadb_address_len = 
+				(sizeof(struct sadb_address)+sockaddr_size)/
+				sizeof(uint64_t);
+			addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
+			addr->sadb_address_proto =
+				pfkey_proto_from_xfrm(x->sel.proto);
+			addr->sadb_address_prefixlen = x->sel.prefixlen_s;
+			addr->sadb_address_reserved = 0;
+
+			sin = (struct sockaddr_in *) (addr + 1);
+			sin->sin_family = AF_INET;
+			sin->sin_addr.s_addr = x->sel.saddr.a4;
+			sin->sin_port = x->sel.sport;
+			memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+		}
+	}
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	else if (x->props.family == AF_INET6) {
+		addr->sadb_address_prefixlen = 128;
+
+		sin6 = (struct sockaddr_in6 *) (addr + 1);
+		sin6->sin6_family = AF_INET6;
+		sin6->sin6_port = 0;
+		sin6->sin6_flowinfo = 0;
+		memcpy(&sin6->sin6_addr, x->id.daddr.a6, sizeof(struct in6_addr));
+		sin6->sin6_scope_id = 0;
+
+		if (memcmp (x->sel.saddr.a6, x->props.saddr.a6,
+			    sizeof(struct in6_addr))) {
+			addr = (struct sadb_address *) skb_put(skb, 
+				sizeof(struct sadb_address)+sockaddr_size);
+			addr->sadb_address_len = 
+				(sizeof(struct sadb_address)+sockaddr_size)/
+				sizeof(uint64_t);
+			addr->sadb_address_exttype = SADB_EXT_ADDRESS_PROXY;
+			addr->sadb_address_proto =
+				pfkey_proto_from_xfrm(x->sel.proto);
+			addr->sadb_address_prefixlen = x->sel.prefixlen_s;
+			addr->sadb_address_reserved = 0;
+
+			sin6 = (struct sockaddr_in6 *) (addr + 1);
+			sin6->sin6_family = AF_INET6;
+			sin6->sin6_port = x->sel.sport;
+			sin6->sin6_flowinfo = 0;
+			memcpy(&sin6->sin6_addr, x->sel.saddr.a6,
+			       sizeof(struct in6_addr));
+			sin6->sin6_scope_id = 0;
+		}
+	}
+#endif
+	else
+		BUG();
+
+	/* auth key */
+	if (add_keys && auth_key_size) {
+		key = (struct sadb_key *) skb_put(skb, 
+						  sizeof(struct sadb_key)+auth_key_size);
+		key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
+			sizeof(uint64_t);
+		key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
+		key->sadb_key_bits = x->aalg->alg_key_len;
+		key->sadb_key_reserved = 0;
+		memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
+	}
+	/* encrypt key */
+	if (add_keys && encrypt_key_size) {
+		key = (struct sadb_key *) skb_put(skb, 
+						  sizeof(struct sadb_key)+encrypt_key_size);
+		key->sadb_key_len = (sizeof(struct sadb_key) + 
+				     encrypt_key_size) / sizeof(uint64_t);
+		key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
+		key->sadb_key_bits = x->ealg->alg_key_len;
+		key->sadb_key_reserved = 0;
+		memcpy(key + 1, x->ealg->alg_key, 
+		       (x->ealg->alg_key_len+7)/8);
+	}
+
+	/* sa */
+	sa2 = (struct sadb_x_sa2 *)  skb_put(skb, sizeof(struct sadb_x_sa2));
+	sa2->sadb_x_sa2_len = sizeof(struct sadb_x_sa2)/sizeof(uint64_t);
+	sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
+	sa2->sadb_x_sa2_mode = x->props.mode + 1;
+	sa2->sadb_x_sa2_reserved1 = 0;
+	sa2->sadb_x_sa2_reserved2 = 0;
+	sa2->sadb_x_sa2_sequence = 0;
+	sa2->sadb_x_sa2_reqid = x->props.reqid;
+
+	if (natt && natt->encap_type) {
+		struct sadb_x_nat_t_type *n_type;
+		struct sadb_x_nat_t_port *n_port;
+
+		/* type */
+		n_type = (struct sadb_x_nat_t_type*) skb_put(skb, sizeof(*n_type));
+		n_type->sadb_x_nat_t_type_len = sizeof(*n_type)/sizeof(uint64_t);
+		n_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
+		n_type->sadb_x_nat_t_type_type = natt->encap_type;
+		n_type->sadb_x_nat_t_type_reserved[0] = 0;
+		n_type->sadb_x_nat_t_type_reserved[1] = 0;
+		n_type->sadb_x_nat_t_type_reserved[2] = 0;
+
+		/* source port */
+		n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
+		n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
+		n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
+		n_port->sadb_x_nat_t_port_port = natt->encap_sport;
+		n_port->sadb_x_nat_t_port_reserved = 0;
+
+		/* dest port */
+		n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
+		n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
+		n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
+		n_port->sadb_x_nat_t_port_port = natt->encap_dport;
+		n_port->sadb_x_nat_t_port_reserved = 0;
+	}
+
+	return skb;
+}
+
+static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr, 
+						void **ext_hdrs)
+{
+	struct xfrm_state *x; 
+	struct sadb_lifetime *lifetime;
+	struct sadb_sa *sa;
+	struct sadb_key *key;
+	uint16_t proto;
+	int err;
+	
+
+	sa = (struct sadb_sa *) ext_hdrs[SADB_EXT_SA-1];
+	if (!sa ||
+	    !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
+				     ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
+		return ERR_PTR(-EINVAL);
+	if (hdr->sadb_msg_satype == SADB_SATYPE_ESP &&
+	    !ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
+		return ERR_PTR(-EINVAL);
+	if (hdr->sadb_msg_satype == SADB_SATYPE_AH &&
+	    !ext_hdrs[SADB_EXT_KEY_AUTH-1])
+		return ERR_PTR(-EINVAL);
+	if (!!ext_hdrs[SADB_EXT_LIFETIME_HARD-1] !=
+	    !!ext_hdrs[SADB_EXT_LIFETIME_SOFT-1])
+		return ERR_PTR(-EINVAL);
+
+	proto = pfkey_satype2proto(hdr->sadb_msg_satype);
+	if (proto == 0)
+		return ERR_PTR(-EINVAL);
+
+	/* default error is no buffer space */
+	err = -ENOBUFS;
+
+	/* RFC2367:
+
+   Only SADB_SASTATE_MATURE SAs may be submitted in an SADB_ADD message.
+   SADB_SASTATE_LARVAL SAs are created by SADB_GETSPI and it is not
+   sensible to add a new SA in the DYING or SADB_SASTATE_DEAD state.
+   Therefore, the sadb_sa_state field of all submitted SAs MUST be
+   SADB_SASTATE_MATURE and the kernel MUST return an error if this is
+   not true.
+
+           However, KAME setkey always uses SADB_SASTATE_LARVAL.
+	   Hence, we have to _ignore_ sadb_sa_state, which is also reasonable.
+	 */
+	if (sa->sadb_sa_auth > SADB_AALG_MAX ||
+	    (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP &&
+	     sa->sadb_sa_encrypt > SADB_X_CALG_MAX) ||
+	    sa->sadb_sa_encrypt > SADB_EALG_MAX)
+		return ERR_PTR(-EINVAL);
+	key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
+	if (key != NULL &&
+	    sa->sadb_sa_auth != SADB_X_AALG_NULL &&
+	    ((key->sadb_key_bits+7) / 8 == 0 ||
+	     (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
+		return ERR_PTR(-EINVAL);
+	key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
+	if (key != NULL &&
+	    sa->sadb_sa_encrypt != SADB_EALG_NULL &&
+	    ((key->sadb_key_bits+7) / 8 == 0 ||
+	     (key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
+		return ERR_PTR(-EINVAL);
+
+	x = xfrm_state_alloc();
+	if (x == NULL)
+		return ERR_PTR(-ENOBUFS);
+
+	x->id.proto = proto;
+	x->id.spi = sa->sadb_sa_spi;
+	x->props.replay_window = sa->sadb_sa_replay;
+	if (sa->sadb_sa_flags & SADB_SAFLAGS_NOECN)
+		x->props.flags |= XFRM_STATE_NOECN;
+	if (sa->sadb_sa_flags & SADB_SAFLAGS_DECAP_DSCP)
+		x->props.flags |= XFRM_STATE_DECAP_DSCP;
+
+	lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_HARD-1];
+	if (lifetime != NULL) {
+		x->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
+		x->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
+		x->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
+		x->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
+	}
+	lifetime = (struct sadb_lifetime*) ext_hdrs[SADB_EXT_LIFETIME_SOFT-1];
+	if (lifetime != NULL) {
+		x->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
+		x->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
+		x->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
+		x->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
+	}
+	key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_AUTH-1];
+	if (sa->sadb_sa_auth) {
+		int keysize = 0;
+		struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);
+		if (!a) {
+			err = -ENOSYS;
+			goto out;
+		}
+		if (key)
+			keysize = (key->sadb_key_bits + 7) / 8;
+		x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
+		if (!x->aalg)
+			goto out;
+		strcpy(x->aalg->alg_name, a->name);
+		x->aalg->alg_key_len = 0;
+		if (key) {
+			x->aalg->alg_key_len = key->sadb_key_bits;
+			memcpy(x->aalg->alg_key, key+1, keysize);
+		}
+		x->props.aalgo = sa->sadb_sa_auth;
+		/* x->algo.flags = sa->sadb_sa_flags; */
+	}
+	if (sa->sadb_sa_encrypt) {
+		if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {
+			struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);
+			if (!a) {
+				err = -ENOSYS;
+				goto out;
+			}
+			x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
+			if (!x->calg)
+				goto out;
+			strcpy(x->calg->alg_name, a->name);
+			x->props.calgo = sa->sadb_sa_encrypt;
+		} else {
+			int keysize = 0;
+			struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);
+			if (!a) {
+				err = -ENOSYS;
+				goto out;
+			}
+			key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
+			if (key)
+				keysize = (key->sadb_key_bits + 7) / 8;
+			x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
+			if (!x->ealg)
+				goto out;
+			strcpy(x->ealg->alg_name, a->name);
+			x->ealg->alg_key_len = 0;
+			if (key) {
+				x->ealg->alg_key_len = key->sadb_key_bits;
+				memcpy(x->ealg->alg_key, key+1, keysize);
+			}
+			x->props.ealgo = sa->sadb_sa_encrypt;
+		}
+	}
+	/* x->algo.flags = sa->sadb_sa_flags; */
+
+	x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 
+						    &x->props.saddr);
+	if (!x->props.family) {
+		err = -EAFNOSUPPORT;
+		goto out;
+	}
+	pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1], 
+				  &x->id.daddr);
+
+	if (ext_hdrs[SADB_X_EXT_SA2-1]) {
+		struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
+		x->props.mode = sa2->sadb_x_sa2_mode;
+		if (x->props.mode)
+			x->props.mode--;
+		x->props.reqid = sa2->sadb_x_sa2_reqid;
+	}
+
+	if (ext_hdrs[SADB_EXT_ADDRESS_PROXY-1]) {
+		struct sadb_address *addr = ext_hdrs[SADB_EXT_ADDRESS_PROXY-1];
+
+		/* Nobody uses this, but we try. */
+		x->sel.family = pfkey_sadb_addr2xfrm_addr(addr, &x->sel.saddr);
+		x->sel.prefixlen_s = addr->sadb_address_prefixlen;
+	}
+
+	if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) {
+		struct sadb_x_nat_t_type* n_type;
+		struct xfrm_encap_tmpl *natt;
+
+		x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
+		if (!x->encap)
+			goto out;
+
+		natt = x->encap;
+		n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];
+		natt->encap_type = n_type->sadb_x_nat_t_type_type;
+
+		if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
+			struct sadb_x_nat_t_port* n_port =
+				ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
+			natt->encap_sport = n_port->sadb_x_nat_t_port_port;
+		}
+		if (ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1]) {
+			struct sadb_x_nat_t_port* n_port =
+				ext_hdrs[SADB_X_EXT_NAT_T_DPORT-1];
+			natt->encap_dport = n_port->sadb_x_nat_t_port_port;
+		}
+	}
+
+	x->type = xfrm_get_type(proto, x->props.family);
+	if (x->type == NULL) {
+		err = -ENOPROTOOPT;
+		goto out;
+	}
+	if (x->type->init_state(x, NULL)) {
+		err = -EINVAL;
+		goto out;
+	}
+	x->km.seq = hdr->sadb_msg_seq;
+	x->km.state = XFRM_STATE_VALID;
+	return x;
+
+out:
+	x->km.state = XFRM_STATE_DEAD;
+	xfrm_state_put(x);
+	return ERR_PTR(err);
+}
+
+static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+	return -EOPNOTSUPP;
+}
+
+static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+	struct sk_buff *resp_skb;
+	struct sadb_x_sa2 *sa2;
+	struct sadb_address *saddr, *daddr;
+	struct sadb_msg *out_hdr;
+	struct xfrm_state *x = NULL;
+	u8 mode;
+	u32 reqid;
+	u8 proto;
+	unsigned short family;
+	xfrm_address_t *xsaddr = NULL, *xdaddr = NULL;
+
+	if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
+				     ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
+		return -EINVAL;
+
+	proto = pfkey_satype2proto(hdr->sadb_msg_satype);
+	if (proto == 0)
+		return -EINVAL;
+
+	if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
+		mode = sa2->sadb_x_sa2_mode - 1;
+		reqid = sa2->sadb_x_sa2_reqid;
+	} else {
+		mode = 0;
+		reqid = 0;
+	}
+
+	saddr = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
+	daddr = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
+
+	family = ((struct sockaddr *)(saddr + 1))->sa_family;
+	switch (family) {
+	case AF_INET:
+		xdaddr = (xfrm_address_t *)&((struct sockaddr_in *)(daddr + 1))->sin_addr.s_addr;
+		xsaddr = (xfrm_address_t *)&((struct sockaddr_in *)(saddr + 1))->sin_addr.s_addr;
+		break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	case AF_INET6:
+		xdaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(daddr + 1))->sin6_addr;
+		xsaddr = (xfrm_address_t *)&((struct sockaddr_in6 *)(saddr + 1))->sin6_addr;
+		break;
+#endif
+	}
+
+	if (hdr->sadb_msg_seq) {
+		x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
+		if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
+			xfrm_state_put(x);
+			x = NULL;
+		}
+	}
+
+	if (!x)
+		x = xfrm_find_acq(mode, reqid, proto, xdaddr, xsaddr, 1, family);
+
+	if (x == NULL)
+		return -ENOENT;
+
+	resp_skb = ERR_PTR(-ENOENT);
+
+	spin_lock_bh(&x->lock);
+	if (x->km.state != XFRM_STATE_DEAD) {
+		struct sadb_spirange *range = ext_hdrs[SADB_EXT_SPIRANGE-1];
+		u32 min_spi, max_spi;
+
+		if (range != NULL) {
+			min_spi = range->sadb_spirange_min;
+			max_spi = range->sadb_spirange_max;
+		} else {
+			min_spi = 0x100;
+			max_spi = 0x0fffffff;
+		}
+		xfrm_alloc_spi(x, htonl(min_spi), htonl(max_spi));
+		if (x->id.spi)
+			resp_skb = pfkey_xfrm_state2msg(x, 0, 3);
+	}
+	spin_unlock_bh(&x->lock);
+
+	if (IS_ERR(resp_skb)) {
+		xfrm_state_put(x);
+		return  PTR_ERR(resp_skb);
+	}
+
+	out_hdr = (struct sadb_msg *) resp_skb->data;
+	out_hdr->sadb_msg_version = hdr->sadb_msg_version;
+	out_hdr->sadb_msg_type = SADB_GETSPI;
+	out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
+	out_hdr->sadb_msg_errno = 0;
+	out_hdr->sadb_msg_reserved = 0;
+	out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
+	out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
+
+	xfrm_state_put(x);
+
+	pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
+
+	return 0;
+}
+
+static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+	struct xfrm_state *x;
+
+	if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
+		return -EOPNOTSUPP;
+
+	if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
+		return 0;
+
+	x = xfrm_find_acq_byseq(hdr->sadb_msg_seq);
+	if (x == NULL)
+		return 0;
+
+	spin_lock_bh(&x->lock);
+	if (x->km.state == XFRM_STATE_ACQ) {
+		x->km.state = XFRM_STATE_ERROR;
+		wake_up(&km_waitq);
+	}
+	spin_unlock_bh(&x->lock);
+	xfrm_state_put(x);
+	return 0;
+}
+
+
+static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+	struct sk_buff *out_skb;
+	struct sadb_msg *out_hdr;
+	struct xfrm_state *x;
+	int err;
+
+	xfrm_probe_algs();
+	
+	x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
+	if (IS_ERR(x))
+		return PTR_ERR(x);
+
+	if (hdr->sadb_msg_type == SADB_ADD)
+		err = xfrm_state_add(x);
+	else
+		err = xfrm_state_update(x);
+
+	if (err < 0) {
+		x->km.state = XFRM_STATE_DEAD;
+		xfrm_state_put(x);
+		return err;
+	}
+
+	out_skb = pfkey_xfrm_state2msg(x, 0, 3);
+	if (IS_ERR(out_skb))
+		return  PTR_ERR(out_skb); /* XXX Should we return 0 here ? */
+
+	out_hdr = (struct sadb_msg *) out_skb->data;
+	out_hdr->sadb_msg_version = hdr->sadb_msg_version;
+	out_hdr->sadb_msg_type = hdr->sadb_msg_type;
+	out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
+	out_hdr->sadb_msg_errno = 0;
+	out_hdr->sadb_msg_reserved = 0;
+	out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
+	out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
+
+	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, sk);
+
+	return 0;
+}
+
+static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+	struct xfrm_state *x;
+
+	if (!ext_hdrs[SADB_EXT_SA-1] ||
+	    !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
+				     ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
+		return -EINVAL;
+
+	x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
+	if (x == NULL)
+		return -ESRCH;
+
+	if (xfrm_state_kern(x)) {
+		xfrm_state_put(x);
+		return -EPERM;
+	}
+	
+	xfrm_state_delete(x);
+	xfrm_state_put(x);
+
+	pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, 
+			BROADCAST_ALL, sk);
+
+	return 0;
+}
+
+static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+	__u8 proto;
+	struct sk_buff *out_skb;
+	struct sadb_msg *out_hdr;
+	struct xfrm_state *x;
+
+	if (!ext_hdrs[SADB_EXT_SA-1] ||
+	    !present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
+				     ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
+		return -EINVAL;
+
+	x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
+	if (x == NULL)
+		return -ESRCH;
+
+	out_skb = pfkey_xfrm_state2msg(x, 1, 3);
+	proto = x->id.proto;
+	xfrm_state_put(x);
+	if (IS_ERR(out_skb))
+		return  PTR_ERR(out_skb);
+
+	out_hdr = (struct sadb_msg *) out_skb->data;
+	out_hdr->sadb_msg_version = hdr->sadb_msg_version;
+	out_hdr->sadb_msg_type = SADB_DUMP;
+	out_hdr->sadb_msg_satype = pfkey_proto2satype(proto);
+	out_hdr->sadb_msg_errno = 0;
+	out_hdr->sadb_msg_reserved = 0;
+	out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
+	out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
+	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
+
+	return 0;
+}
+
+static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig, int allocation)
+{
+	struct sk_buff *skb;
+	struct sadb_msg *hdr;
+	int len, auth_len, enc_len, i;
+
+	auth_len = xfrm_count_auth_supported();
+	if (auth_len) {
+		auth_len *= sizeof(struct sadb_alg);
+		auth_len += sizeof(struct sadb_supported);
+	}
+	
+	enc_len = xfrm_count_enc_supported();
+	if (enc_len) {
+		enc_len *= sizeof(struct sadb_alg);
+		enc_len += sizeof(struct sadb_supported);
+	}
+	
+	len = enc_len + auth_len + sizeof(struct sadb_msg);
+
+	skb = alloc_skb(len + 16, allocation);
+	if (!skb)
+		goto out_put_algs;
+
+	hdr = (struct sadb_msg *) skb_put(skb, sizeof(*hdr));
+	pfkey_hdr_dup(hdr, orig);
+	hdr->sadb_msg_errno = 0;
+	hdr->sadb_msg_len = len / sizeof(uint64_t);
+
+	if (auth_len) {
+		struct sadb_supported *sp;
+		struct sadb_alg *ap;
+
+		sp = (struct sadb_supported *) skb_put(skb, auth_len);
+		ap = (struct sadb_alg *) (sp + 1);
+
+		sp->sadb_supported_len = auth_len / sizeof(uint64_t);
+		sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
+
+		for (i = 0; ; i++) {
+			struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
+			if (!aalg)
+				break;
+			if (aalg->available)
+				*ap++ = aalg->desc;
+		}
+	}
+
+	if (enc_len) {
+		struct sadb_supported *sp;
+		struct sadb_alg *ap;
+
+		sp = (struct sadb_supported *) skb_put(skb, enc_len);
+		ap = (struct sadb_alg *) (sp + 1);
+
+		sp->sadb_supported_len = enc_len / sizeof(uint64_t);
+		sp->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
+
+		for (i = 0; ; i++) {
+			struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
+			if (!ealg)
+				break;
+			if (ealg->available)
+				*ap++ = ealg->desc;
+		}
+	}
+
+out_put_algs:
+	return skb;
+}
+
+static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+	struct pfkey_sock *pfk = pfkey_sk(sk);
+	struct sk_buff *supp_skb;
+
+	if (hdr->sadb_msg_satype > SADB_SATYPE_MAX)
+		return -EINVAL;
+
+	if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) {
+		if (pfk->registered&(1<<hdr->sadb_msg_satype))
+			return -EEXIST;
+		pfk->registered |= (1<<hdr->sadb_msg_satype);
+	}
+
+	xfrm_probe_algs();
+	
+	supp_skb = compose_sadb_supported(hdr, GFP_KERNEL);
+	if (!supp_skb) {
+		if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC)
+			pfk->registered &= ~(1<<hdr->sadb_msg_satype);
+
+		return -ENOBUFS;
+	}
+
+	pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
+
+	return 0;
+}
+
+static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+	unsigned proto;
+	struct sk_buff *skb_out;
+	struct sadb_msg *hdr_out;
+
+	proto = pfkey_satype2proto(hdr->sadb_msg_satype);
+	if (proto == 0)
+		return -EINVAL;
+
+	skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
+	if (!skb_out)
+		return -ENOBUFS;
+
+	xfrm_state_flush(proto);
+
+	hdr_out = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
+	pfkey_hdr_dup(hdr_out, hdr);
+	hdr_out->sadb_msg_errno = (uint8_t) 0;
+	hdr_out->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
+
+	pfkey_broadcast(skb_out, GFP_KERNEL, BROADCAST_ALL, NULL);
+
+	return 0;
+}
+
+struct pfkey_dump_data
+{
+	struct sk_buff *skb;
+	struct sadb_msg *hdr;
+	struct sock *sk;
+};
+
+static int dump_sa(struct xfrm_state *x, int count, void *ptr)
+{
+	struct pfkey_dump_data *data = ptr;
+	struct sk_buff *out_skb;
+	struct sadb_msg *out_hdr;
+
+	out_skb = pfkey_xfrm_state2msg(x, 1, 3);
+	if (IS_ERR(out_skb))
+		return PTR_ERR(out_skb);
+
+	out_hdr = (struct sadb_msg *) out_skb->data;
+	out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
+	out_hdr->sadb_msg_type = SADB_DUMP;
+	out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
+	out_hdr->sadb_msg_errno = 0;
+	out_hdr->sadb_msg_reserved = 0;
+	out_hdr->sadb_msg_seq = count;
+	out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
+	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
+	return 0;
+}
+
+static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+	u8 proto;
+	struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
+
+	proto = pfkey_satype2proto(hdr->sadb_msg_satype);
+	if (proto == 0)
+		return -EINVAL;
+
+	return xfrm_state_walk(proto, dump_sa, &data);
+}
+
+static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+	struct pfkey_sock *pfk = pfkey_sk(sk);
+	int satype = hdr->sadb_msg_satype;
+
+	if (hdr->sadb_msg_len == (sizeof(*hdr) / sizeof(uint64_t))) {
+		/* XXX we mangle packet... */
+		hdr->sadb_msg_errno = 0;
+		if (satype != 0 && satype != 1)
+			return -EINVAL;
+		pfk->promisc = satype;
+	}
+	pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
+	return 0;
+}
+
+static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
+{
+	int i;
+	u32 reqid = *(u32*)ptr;
+
+	for (i=0; i<xp->xfrm_nr; i++) {
+		if (xp->xfrm_vec[i].reqid == reqid)
+			return -EEXIST;
+	}
+	return 0;
+}
+
+static u32 gen_reqid(void)
+{
+	u32 start;
+	static u32 reqid = IPSEC_MANUAL_REQID_MAX;
+
+	start = reqid;
+	do {
+		++reqid;
+		if (reqid == 0)
+			reqid = IPSEC_MANUAL_REQID_MAX+1;
+		if (xfrm_policy_walk(check_reqid, (void*)&reqid) != -EEXIST)
+			return reqid;
+	} while (reqid != start);
+	return 0;
+}
+
+static int
+parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
+{
+	struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
+	struct sockaddr_in *sin;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	struct sockaddr_in6 *sin6;
+#endif
+
+	if (xp->xfrm_nr >= XFRM_MAX_DEPTH)
+		return -ELOOP;
+
+	if (rq->sadb_x_ipsecrequest_mode == 0)
+		return -EINVAL;
+
+	t->id.proto = rq->sadb_x_ipsecrequest_proto; /* XXX check proto */
+	t->mode = rq->sadb_x_ipsecrequest_mode-1;
+	if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_USE)
+		t->optional = 1;
+	else if (rq->sadb_x_ipsecrequest_level == IPSEC_LEVEL_UNIQUE) {
+		t->reqid = rq->sadb_x_ipsecrequest_reqid;
+		if (t->reqid > IPSEC_MANUAL_REQID_MAX)
+			t->reqid = 0;
+		if (!t->reqid && !(t->reqid = gen_reqid()))
+			return -ENOBUFS;
+	}
+
+	/* addresses present only in tunnel mode */
+	if (t->mode) {
+		switch (xp->family) {
+		case AF_INET:
+			sin = (void*)(rq+1);
+			if (sin->sin_family != AF_INET)
+				return -EINVAL;
+			t->saddr.a4 = sin->sin_addr.s_addr;
+			sin++;
+			if (sin->sin_family != AF_INET)
+				return -EINVAL;
+			t->id.daddr.a4 = sin->sin_addr.s_addr;
+			break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+		case AF_INET6:
+			sin6 = (void *)(rq+1);
+			if (sin6->sin6_family != AF_INET6)
+				return -EINVAL;
+			memcpy(t->saddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
+			sin6++;
+			if (sin6->sin6_family != AF_INET6)
+				return -EINVAL;
+			memcpy(t->id.daddr.a6, &sin6->sin6_addr, sizeof(struct in6_addr));
+			break;
+#endif
+		default:
+			return -EINVAL;
+		}
+	}
+	/* No way to set this via kame pfkey */
+	t->aalgos = t->ealgos = t->calgos = ~0;
+	xp->xfrm_nr++;
+	return 0;
+}
+
+static int
+parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
+{
+	int err;
+	int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
+	struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
+
+	while (len >= sizeof(struct sadb_x_ipsecrequest)) {
+		if ((err = parse_ipsecrequest(xp, rq)) < 0)
+			return err;
+		len -= rq->sadb_x_ipsecrequest_len;
+		rq = (void*)((u8*)rq + rq->sadb_x_ipsecrequest_len);
+	}
+	return 0;
+}
+
+static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
+{
+	int sockaddr_size = pfkey_sockaddr_size(xp->family);
+	int socklen = (xp->family == AF_INET ?
+		       sizeof(struct sockaddr_in) :
+		       sizeof(struct sockaddr_in6));
+
+	return sizeof(struct sadb_msg) +
+		(sizeof(struct sadb_lifetime) * 3) +
+		(sizeof(struct sadb_address) * 2) + 
+		(sockaddr_size * 2) +
+		sizeof(struct sadb_x_policy) +
+		(xp->xfrm_nr * (sizeof(struct sadb_x_ipsecrequest) +
+				(socklen * 2)));
+}
+
+static struct sk_buff * pfkey_xfrm_policy2msg_prep(struct xfrm_policy *xp)
+{
+	struct sk_buff *skb;
+	int size;
+
+	size = pfkey_xfrm_policy2msg_size(xp);
+
+	skb =  alloc_skb(size + 16, GFP_ATOMIC);
+	if (skb == NULL)
+		return ERR_PTR(-ENOBUFS);
+
+	return skb;
+}
+
+static void pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
+{
+	struct sadb_msg *hdr;
+	struct sadb_address *addr;
+	struct sadb_lifetime *lifetime;
+	struct sadb_x_policy *pol;
+	struct sockaddr_in   *sin;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	struct sockaddr_in6  *sin6;
+#endif
+	int i;
+	int size;
+	int sockaddr_size = pfkey_sockaddr_size(xp->family);
+	int socklen = (xp->family == AF_INET ?
+		       sizeof(struct sockaddr_in) :
+		       sizeof(struct sockaddr_in6));
+
+	size = pfkey_xfrm_policy2msg_size(xp);
+
+	/* call should fill header later */
+	hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
+	memset(hdr, 0, size);	/* XXX do we need this ? */
+
+	/* src address */
+	addr = (struct sadb_address*) skb_put(skb, 
+					      sizeof(struct sadb_address)+sockaddr_size);
+	addr->sadb_address_len = 
+		(sizeof(struct sadb_address)+sockaddr_size)/
+			sizeof(uint64_t);
+	addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
+	addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
+	addr->sadb_address_prefixlen = xp->selector.prefixlen_s;
+	addr->sadb_address_reserved = 0;
+	/* src address */
+	if (xp->family == AF_INET) {
+		sin = (struct sockaddr_in *) (addr + 1);
+		sin->sin_family = AF_INET;
+		sin->sin_addr.s_addr = xp->selector.saddr.a4;
+		sin->sin_port = xp->selector.sport;
+		memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+	}
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	else if (xp->family == AF_INET6) {
+		sin6 = (struct sockaddr_in6 *) (addr + 1);
+		sin6->sin6_family = AF_INET6;
+		sin6->sin6_port = xp->selector.sport;
+		sin6->sin6_flowinfo = 0;
+		memcpy(&sin6->sin6_addr, xp->selector.saddr.a6,
+		       sizeof(struct in6_addr));
+		sin6->sin6_scope_id = 0;
+	}
+#endif
+	else
+		BUG();
+
+	/* dst address */
+	addr = (struct sadb_address*) skb_put(skb, 
+					      sizeof(struct sadb_address)+sockaddr_size);
+	addr->sadb_address_len =
+		(sizeof(struct sadb_address)+sockaddr_size)/
+			sizeof(uint64_t);
+	addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
+	addr->sadb_address_proto = pfkey_proto_from_xfrm(xp->selector.proto);
+	addr->sadb_address_prefixlen = xp->selector.prefixlen_d; 
+	addr->sadb_address_reserved = 0;
+	if (xp->family == AF_INET) {
+		sin = (struct sockaddr_in *) (addr + 1);
+		sin->sin_family = AF_INET;
+		sin->sin_addr.s_addr = xp->selector.daddr.a4;
+		sin->sin_port = xp->selector.dport;
+		memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+	}
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	else if (xp->family == AF_INET6) {
+		sin6 = (struct sockaddr_in6 *) (addr + 1);
+		sin6->sin6_family = AF_INET6;
+		sin6->sin6_port = xp->selector.dport;
+		sin6->sin6_flowinfo = 0;
+		memcpy(&sin6->sin6_addr, xp->selector.daddr.a6,
+		       sizeof(struct in6_addr));
+		sin6->sin6_scope_id = 0;
+	}
+#endif
+	else
+		BUG();
+
+	/* hard time */
+	lifetime = (struct sadb_lifetime *)  skb_put(skb, 
+						     sizeof(struct sadb_lifetime));
+	lifetime->sadb_lifetime_len =
+		sizeof(struct sadb_lifetime)/sizeof(uint64_t);
+	lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
+	lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.hard_packet_limit);
+	lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.hard_byte_limit);
+	lifetime->sadb_lifetime_addtime = xp->lft.hard_add_expires_seconds;
+	lifetime->sadb_lifetime_usetime = xp->lft.hard_use_expires_seconds;
+	/* soft time */
+	lifetime = (struct sadb_lifetime *)  skb_put(skb, 
+						     sizeof(struct sadb_lifetime));
+	lifetime->sadb_lifetime_len =
+		sizeof(struct sadb_lifetime)/sizeof(uint64_t);
+	lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
+	lifetime->sadb_lifetime_allocations =  _X2KEY(xp->lft.soft_packet_limit);
+	lifetime->sadb_lifetime_bytes = _X2KEY(xp->lft.soft_byte_limit);
+	lifetime->sadb_lifetime_addtime = xp->lft.soft_add_expires_seconds;
+	lifetime->sadb_lifetime_usetime = xp->lft.soft_use_expires_seconds;
+	/* current time */
+	lifetime = (struct sadb_lifetime *)  skb_put(skb, 
+						     sizeof(struct sadb_lifetime));
+	lifetime->sadb_lifetime_len =
+		sizeof(struct sadb_lifetime)/sizeof(uint64_t);
+	lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
+	lifetime->sadb_lifetime_allocations = xp->curlft.packets;
+	lifetime->sadb_lifetime_bytes = xp->curlft.bytes;
+	lifetime->sadb_lifetime_addtime = xp->curlft.add_time;
+	lifetime->sadb_lifetime_usetime = xp->curlft.use_time;
+
+	pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
+	pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
+	pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
+	pol->sadb_x_policy_type = IPSEC_POLICY_DISCARD;
+	if (xp->action == XFRM_POLICY_ALLOW) {
+		if (xp->xfrm_nr)
+			pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
+		else
+			pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
+	}
+	pol->sadb_x_policy_dir = dir+1;
+	pol->sadb_x_policy_id = xp->index;
+	pol->sadb_x_policy_priority = xp->priority;
+
+	for (i=0; i<xp->xfrm_nr; i++) {
+		struct sadb_x_ipsecrequest *rq;
+		struct xfrm_tmpl *t = xp->xfrm_vec + i;
+		int req_size;
+
+		req_size = sizeof(struct sadb_x_ipsecrequest);
+		if (t->mode)
+			req_size += 2*socklen;
+		else
+			size -= 2*socklen;
+		rq = (void*)skb_put(skb, req_size);
+		pol->sadb_x_policy_len += req_size/8;
+		memset(rq, 0, sizeof(*rq));
+		rq->sadb_x_ipsecrequest_len = req_size;
+		rq->sadb_x_ipsecrequest_proto = t->id.proto;
+		rq->sadb_x_ipsecrequest_mode = t->mode+1;
+		rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_REQUIRE;
+		if (t->reqid)
+			rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_UNIQUE;
+		if (t->optional)
+			rq->sadb_x_ipsecrequest_level = IPSEC_LEVEL_USE;
+		rq->sadb_x_ipsecrequest_reqid = t->reqid;
+		if (t->mode) {
+			switch (xp->family) {
+			case AF_INET:
+				sin = (void*)(rq+1);
+				sin->sin_family = AF_INET;
+				sin->sin_addr.s_addr = t->saddr.a4;
+				sin->sin_port = 0;
+				memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+				sin++;
+				sin->sin_family = AF_INET;
+				sin->sin_addr.s_addr = t->id.daddr.a4;
+				sin->sin_port = 0;
+				memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+				break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+			case AF_INET6:
+				sin6 = (void*)(rq+1);
+				sin6->sin6_family = AF_INET6;
+				sin6->sin6_port = 0;
+				sin6->sin6_flowinfo = 0;
+				memcpy(&sin6->sin6_addr, t->saddr.a6,
+				       sizeof(struct in6_addr));
+				sin6->sin6_scope_id = 0;
+
+				sin6++;
+				sin6->sin6_family = AF_INET6;
+				sin6->sin6_port = 0;
+				sin6->sin6_flowinfo = 0;
+				memcpy(&sin6->sin6_addr, t->id.daddr.a6,
+				       sizeof(struct in6_addr));
+				sin6->sin6_scope_id = 0;
+				break;
+#endif
+			default:
+				break;
+			}
+		}
+	}
+	hdr->sadb_msg_len = size / sizeof(uint64_t);
+	hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
+}
+
+static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+	int err;
+	struct sadb_lifetime *lifetime;
+	struct sadb_address *sa;
+	struct sadb_x_policy *pol;
+	struct xfrm_policy *xp;
+	struct sk_buff *out_skb;
+	struct sadb_msg *out_hdr;
+
+	if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
+				     ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
+	    !ext_hdrs[SADB_X_EXT_POLICY-1])
+		return -EINVAL;
+
+	pol = ext_hdrs[SADB_X_EXT_POLICY-1];
+	if (pol->sadb_x_policy_type > IPSEC_POLICY_IPSEC)
+		return -EINVAL;
+	if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
+		return -EINVAL;
+
+	xp = xfrm_policy_alloc(GFP_KERNEL);
+	if (xp == NULL)
+		return -ENOBUFS;
+
+	xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
+		      XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
+	xp->priority = pol->sadb_x_policy_priority;
+
+	sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 
+	xp->family = pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.saddr);
+	if (!xp->family) {
+		err = -EINVAL;
+		goto out;
+	}
+	xp->selector.family = xp->family;
+	xp->selector.prefixlen_s = sa->sadb_address_prefixlen;
+	xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
+	xp->selector.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
+	if (xp->selector.sport)
+		xp->selector.sport_mask = ~0;
+
+	sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], 
+	pfkey_sadb_addr2xfrm_addr(sa, &xp->selector.daddr);
+	xp->selector.prefixlen_d = sa->sadb_address_prefixlen;
+
+	/* Amusing, we set this twice.  KAME apps appear to set same value
+	 * in both addresses.
+	 */
+	xp->selector.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
+
+	xp->selector.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
+	if (xp->selector.dport)
+		xp->selector.dport_mask = ~0;
+
+	xp->lft.soft_byte_limit = XFRM_INF;
+	xp->lft.hard_byte_limit = XFRM_INF;
+	xp->lft.soft_packet_limit = XFRM_INF;
+	xp->lft.hard_packet_limit = XFRM_INF;
+	if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_HARD-1]) != NULL) {
+		xp->lft.hard_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
+		xp->lft.hard_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
+		xp->lft.hard_add_expires_seconds = lifetime->sadb_lifetime_addtime;
+		xp->lft.hard_use_expires_seconds = lifetime->sadb_lifetime_usetime;
+	}
+	if ((lifetime = ext_hdrs[SADB_EXT_LIFETIME_SOFT-1]) != NULL) {
+		xp->lft.soft_packet_limit = _KEY2X(lifetime->sadb_lifetime_allocations);
+		xp->lft.soft_byte_limit = _KEY2X(lifetime->sadb_lifetime_bytes);
+		xp->lft.soft_add_expires_seconds = lifetime->sadb_lifetime_addtime;
+		xp->lft.soft_use_expires_seconds = lifetime->sadb_lifetime_usetime;
+	}
+	xp->xfrm_nr = 0;
+	if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
+	    (err = parse_ipsecrequests(xp, pol)) < 0)
+		goto out;
+
+	out_skb = pfkey_xfrm_policy2msg_prep(xp);
+	if (IS_ERR(out_skb)) {
+		err =  PTR_ERR(out_skb);
+		goto out;
+	}
+
+	err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
+				 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
+	if (err) {
+		kfree_skb(out_skb);
+		goto out;
+	}
+
+	pfkey_xfrm_policy2msg(out_skb, xp, pol->sadb_x_policy_dir-1);
+
+	xfrm_pol_put(xp);
+
+	out_hdr = (struct sadb_msg *) out_skb->data;
+	out_hdr->sadb_msg_version = hdr->sadb_msg_version;
+	out_hdr->sadb_msg_type = hdr->sadb_msg_type;
+	out_hdr->sadb_msg_satype = 0;
+	out_hdr->sadb_msg_errno = 0;
+	out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
+	out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
+	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, sk);
+	return 0;
+
+out:
+	kfree(xp);
+	return err;
+}
+
+static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+	int err;
+	struct sadb_address *sa;
+	struct sadb_x_policy *pol;
+	struct xfrm_policy *xp;
+	struct sk_buff *out_skb;
+	struct sadb_msg *out_hdr;
+	struct xfrm_selector sel;
+
+	if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
+				     ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
+	    !ext_hdrs[SADB_X_EXT_POLICY-1])
+		return -EINVAL;
+
+	pol = ext_hdrs[SADB_X_EXT_POLICY-1];
+	if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
+		return -EINVAL;
+
+	memset(&sel, 0, sizeof(sel));
+
+	sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1], 
+	sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
+	sel.prefixlen_s = sa->sadb_address_prefixlen;
+	sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
+	sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
+	if (sel.sport)
+		sel.sport_mask = ~0;
+
+	sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1], 
+	pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
+	sel.prefixlen_d = sa->sadb_address_prefixlen;
+	sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
+	sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
+	if (sel.dport)
+		sel.dport_mask = ~0;
+
+	xp = xfrm_policy_bysel(pol->sadb_x_policy_dir-1, &sel, 1);
+	if (xp == NULL)
+		return -ENOENT;
+
+	err = 0;
+
+	out_skb = pfkey_xfrm_policy2msg_prep(xp);
+	if (IS_ERR(out_skb)) {
+		err =  PTR_ERR(out_skb);
+		goto out;
+	}
+	pfkey_xfrm_policy2msg(out_skb, xp, pol->sadb_x_policy_dir-1);
+
+	out_hdr = (struct sadb_msg *) out_skb->data;
+	out_hdr->sadb_msg_version = hdr->sadb_msg_version;
+	out_hdr->sadb_msg_type = SADB_X_SPDDELETE;
+	out_hdr->sadb_msg_satype = 0;
+	out_hdr->sadb_msg_errno = 0;
+	out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
+	out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
+	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, sk);
+	err = 0;
+
+out:
+	xfrm_pol_put(xp);
+	return err;
+}
+
+static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+	int err;
+	struct sadb_x_policy *pol;
+	struct xfrm_policy *xp;
+	struct sk_buff *out_skb;
+	struct sadb_msg *out_hdr;
+
+	if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
+		return -EINVAL;
+
+	xp = xfrm_policy_byid(0, pol->sadb_x_policy_id,
+			      hdr->sadb_msg_type == SADB_X_SPDDELETE2);
+	if (xp == NULL)
+		return -ENOENT;
+
+	err = 0;
+
+	out_skb = pfkey_xfrm_policy2msg_prep(xp);
+	if (IS_ERR(out_skb)) {
+		err =  PTR_ERR(out_skb);
+		goto out;
+	}
+	pfkey_xfrm_policy2msg(out_skb, xp, pol->sadb_x_policy_dir-1);
+
+	out_hdr = (struct sadb_msg *) out_skb->data;
+	out_hdr->sadb_msg_version = hdr->sadb_msg_version;
+	out_hdr->sadb_msg_type = hdr->sadb_msg_type;
+	out_hdr->sadb_msg_satype = 0;
+	out_hdr->sadb_msg_errno = 0;
+	out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
+	out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
+	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, sk);
+	err = 0;
+
+out:
+	xfrm_pol_put(xp);
+	return err;
+}
+
+static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
+{
+	struct pfkey_dump_data *data = ptr;
+	struct sk_buff *out_skb;
+	struct sadb_msg *out_hdr;
+
+	out_skb = pfkey_xfrm_policy2msg_prep(xp);
+	if (IS_ERR(out_skb))
+		return PTR_ERR(out_skb);
+
+	pfkey_xfrm_policy2msg(out_skb, xp, dir);
+
+	out_hdr = (struct sadb_msg *) out_skb->data;
+	out_hdr->sadb_msg_version = data->hdr->sadb_msg_version;
+	out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
+	out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
+	out_hdr->sadb_msg_errno = 0;
+	out_hdr->sadb_msg_seq = count;
+	out_hdr->sadb_msg_pid = data->hdr->sadb_msg_pid;
+	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, data->sk);
+	return 0;
+}
+
+static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+	struct pfkey_dump_data data = { .skb = skb, .hdr = hdr, .sk = sk };
+
+	return xfrm_policy_walk(dump_sp, &data);
+}
+
+static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
+{
+	struct sk_buff *skb_out;
+	struct sadb_msg *hdr_out;
+
+	skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_KERNEL);
+	if (!skb_out)
+		return -ENOBUFS;
+
+	xfrm_policy_flush();
+
+	hdr_out = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
+	pfkey_hdr_dup(hdr_out, hdr);
+	hdr_out->sadb_msg_errno = (uint8_t) 0;
+	hdr_out->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
+	pfkey_broadcast(skb_out, GFP_KERNEL, BROADCAST_ALL, NULL);
+
+	return 0;
+}
+
+typedef int (*pfkey_handler)(struct sock *sk, struct sk_buff *skb,
+			     struct sadb_msg *hdr, void **ext_hdrs);
+static pfkey_handler pfkey_funcs[SADB_MAX + 1] = {
+	[SADB_RESERVED]		= pfkey_reserved,
+	[SADB_GETSPI]		= pfkey_getspi,
+	[SADB_UPDATE]		= pfkey_add,
+	[SADB_ADD]		= pfkey_add,
+	[SADB_DELETE]		= pfkey_delete,
+	[SADB_GET]		= pfkey_get,
+	[SADB_ACQUIRE]		= pfkey_acquire,
+	[SADB_REGISTER]		= pfkey_register,
+	[SADB_EXPIRE]		= NULL,
+	[SADB_FLUSH]		= pfkey_flush,
+	[SADB_DUMP]		= pfkey_dump,
+	[SADB_X_PROMISC]	= pfkey_promisc,
+	[SADB_X_PCHANGE]	= NULL,
+	[SADB_X_SPDUPDATE]	= pfkey_spdadd,
+	[SADB_X_SPDADD]		= pfkey_spdadd,
+	[SADB_X_SPDDELETE]	= pfkey_spddelete,
+	[SADB_X_SPDGET]		= pfkey_spdget,
+	[SADB_X_SPDACQUIRE]	= NULL,
+	[SADB_X_SPDDUMP]	= pfkey_spddump,
+	[SADB_X_SPDFLUSH]	= pfkey_spdflush,
+	[SADB_X_SPDSETIDX]	= pfkey_spdadd,
+	[SADB_X_SPDDELETE2]	= pfkey_spdget,
+};
+
+static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr)
+{
+	void *ext_hdrs[SADB_EXT_MAX];
+	int err;
+
+	pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
+			BROADCAST_PROMISC_ONLY, NULL);
+
+	memset(ext_hdrs, 0, sizeof(ext_hdrs));
+	err = parse_exthdrs(skb, hdr, ext_hdrs);
+	if (!err) {
+		err = -EOPNOTSUPP;
+		if (pfkey_funcs[hdr->sadb_msg_type])
+			err = pfkey_funcs[hdr->sadb_msg_type](sk, skb, hdr, ext_hdrs);
+	}
+	return err;
+}
+
+static struct sadb_msg *pfkey_get_base_msg(struct sk_buff *skb, int *errp)
+{
+	struct sadb_msg *hdr = NULL;
+
+	if (skb->len < sizeof(*hdr)) {
+		*errp = -EMSGSIZE;
+	} else {
+		hdr = (struct sadb_msg *) skb->data;
+		if (hdr->sadb_msg_version != PF_KEY_V2 ||
+		    hdr->sadb_msg_reserved != 0 ||
+		    (hdr->sadb_msg_type <= SADB_RESERVED ||
+		     hdr->sadb_msg_type > SADB_MAX)) {
+			hdr = NULL;
+			*errp = -EINVAL;
+		} else if (hdr->sadb_msg_len != (skb->len /
+						 sizeof(uint64_t)) ||
+			   hdr->sadb_msg_len < (sizeof(struct sadb_msg) /
+						sizeof(uint64_t))) {
+			hdr = NULL;
+			*errp = -EMSGSIZE;
+		} else {
+			*errp = 0;
+		}
+	}
+	return hdr;
+}
+
+static inline int aalg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
+{
+	return t->aalgos & (1 << d->desc.sadb_alg_id);
+}
+
+static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
+{
+	return t->ealgos & (1 << d->desc.sadb_alg_id);
+}
+
+static int count_ah_combs(struct xfrm_tmpl *t)
+{
+	int i, sz = 0;
+
+	for (i = 0; ; i++) {
+		struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
+		if (!aalg)
+			break;
+		if (aalg_tmpl_set(t, aalg) && aalg->available)
+			sz += sizeof(struct sadb_comb);
+	}
+	return sz + sizeof(struct sadb_prop);
+}
+
+static int count_esp_combs(struct xfrm_tmpl *t)
+{
+	int i, k, sz = 0;
+
+	for (i = 0; ; i++) {
+		struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
+		if (!ealg)
+			break;
+			
+		if (!(ealg_tmpl_set(t, ealg) && ealg->available))
+			continue;
+			
+		for (k = 1; ; k++) {
+			struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
+			if (!aalg)
+				break;
+				
+			if (aalg_tmpl_set(t, aalg) && aalg->available)
+				sz += sizeof(struct sadb_comb);
+		}
+	}
+	return sz + sizeof(struct sadb_prop);
+}
+
+static void dump_ah_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
+{
+	struct sadb_prop *p;
+	int i;
+
+	p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
+	p->sadb_prop_len = sizeof(struct sadb_prop)/8;
+	p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
+	p->sadb_prop_replay = 32;
+	memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
+
+	for (i = 0; ; i++) {
+		struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);
+		if (!aalg)
+			break;
+
+		if (aalg_tmpl_set(t, aalg) && aalg->available) {
+			struct sadb_comb *c;
+			c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
+			memset(c, 0, sizeof(*c));
+			p->sadb_prop_len += sizeof(struct sadb_comb)/8;
+			c->sadb_comb_auth = aalg->desc.sadb_alg_id;
+			c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
+			c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
+			c->sadb_comb_hard_addtime = 24*60*60;
+			c->sadb_comb_soft_addtime = 20*60*60;
+			c->sadb_comb_hard_usetime = 8*60*60;
+			c->sadb_comb_soft_usetime = 7*60*60;
+		}
+	}
+}
+
+static void dump_esp_combs(struct sk_buff *skb, struct xfrm_tmpl *t)
+{
+	struct sadb_prop *p;
+	int i, k;
+
+	p = (struct sadb_prop*)skb_put(skb, sizeof(struct sadb_prop));
+	p->sadb_prop_len = sizeof(struct sadb_prop)/8;
+	p->sadb_prop_exttype = SADB_EXT_PROPOSAL;
+	p->sadb_prop_replay = 32;
+	memset(p->sadb_prop_reserved, 0, sizeof(p->sadb_prop_reserved));
+
+	for (i=0; ; i++) {
+		struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);
+		if (!ealg)
+			break;
+	
+		if (!(ealg_tmpl_set(t, ealg) && ealg->available))
+			continue;
+			
+		for (k = 1; ; k++) {
+			struct sadb_comb *c;
+			struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
+			if (!aalg)
+				break;
+			if (!(aalg_tmpl_set(t, aalg) && aalg->available))
+				continue;
+			c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
+			memset(c, 0, sizeof(*c));
+			p->sadb_prop_len += sizeof(struct sadb_comb)/8;
+			c->sadb_comb_auth = aalg->desc.sadb_alg_id;
+			c->sadb_comb_auth_minbits = aalg->desc.sadb_alg_minbits;
+			c->sadb_comb_auth_maxbits = aalg->desc.sadb_alg_maxbits;
+			c->sadb_comb_encrypt = ealg->desc.sadb_alg_id;
+			c->sadb_comb_encrypt_minbits = ealg->desc.sadb_alg_minbits;
+			c->sadb_comb_encrypt_maxbits = ealg->desc.sadb_alg_maxbits;
+			c->sadb_comb_hard_addtime = 24*60*60;
+			c->sadb_comb_soft_addtime = 20*60*60;
+			c->sadb_comb_hard_usetime = 8*60*60;
+			c->sadb_comb_soft_usetime = 7*60*60;
+		}
+	}
+}
+
+static int pfkey_send_notify(struct xfrm_state *x, int hard)
+{
+	struct sk_buff *out_skb;
+	struct sadb_msg *out_hdr;
+	int hsc = (hard ? 2 : 1);
+
+	out_skb = pfkey_xfrm_state2msg(x, 0, hsc);
+	if (IS_ERR(out_skb))
+		return PTR_ERR(out_skb);
+
+	out_hdr = (struct sadb_msg *) out_skb->data;
+	out_hdr->sadb_msg_version = PF_KEY_V2;
+	out_hdr->sadb_msg_type = SADB_EXPIRE;
+	out_hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
+	out_hdr->sadb_msg_errno = 0;
+	out_hdr->sadb_msg_reserved = 0;
+	out_hdr->sadb_msg_seq = 0;
+	out_hdr->sadb_msg_pid = 0;
+
+	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
+	return 0;
+}
+
+static u32 get_acqseq(void)
+{
+	u32 res;
+	static u32 acqseq;
+	static DEFINE_SPINLOCK(acqseq_lock);
+
+	spin_lock_bh(&acqseq_lock);
+	res = (++acqseq ? : ++acqseq);
+	spin_unlock_bh(&acqseq_lock);
+	return res;
+}
+
+static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp, int dir)
+{
+	struct sk_buff *skb;
+	struct sadb_msg *hdr;
+	struct sadb_address *addr;
+	struct sadb_x_policy *pol;
+	struct sockaddr_in *sin;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	struct sockaddr_in6 *sin6;
+#endif
+	int sockaddr_size;
+	int size;
+	
+	sockaddr_size = pfkey_sockaddr_size(x->props.family);
+	if (!sockaddr_size)
+		return -EINVAL;
+
+	size = sizeof(struct sadb_msg) +
+		(sizeof(struct sadb_address) * 2) +
+		(sockaddr_size * 2) +
+		sizeof(struct sadb_x_policy);
+	
+	if (x->id.proto == IPPROTO_AH)
+		size += count_ah_combs(t);
+	else if (x->id.proto == IPPROTO_ESP)
+		size += count_esp_combs(t);
+
+	skb =  alloc_skb(size + 16, GFP_ATOMIC);
+	if (skb == NULL)
+		return -ENOMEM;
+	
+	hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
+	hdr->sadb_msg_version = PF_KEY_V2;
+	hdr->sadb_msg_type = SADB_ACQUIRE;
+	hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
+	hdr->sadb_msg_len = size / sizeof(uint64_t);
+	hdr->sadb_msg_errno = 0;
+	hdr->sadb_msg_reserved = 0;
+	hdr->sadb_msg_seq = x->km.seq = get_acqseq();
+	hdr->sadb_msg_pid = 0;
+
+	/* src address */
+	addr = (struct sadb_address*) skb_put(skb, 
+					      sizeof(struct sadb_address)+sockaddr_size);
+	addr->sadb_address_len = 
+		(sizeof(struct sadb_address)+sockaddr_size)/
+			sizeof(uint64_t);
+	addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
+	addr->sadb_address_proto = 0;
+	addr->sadb_address_reserved = 0;
+	if (x->props.family == AF_INET) {
+		addr->sadb_address_prefixlen = 32;
+
+		sin = (struct sockaddr_in *) (addr + 1);
+		sin->sin_family = AF_INET;
+		sin->sin_addr.s_addr = x->props.saddr.a4;
+		sin->sin_port = 0;
+		memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+	}
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	else if (x->props.family == AF_INET6) {
+		addr->sadb_address_prefixlen = 128;
+
+		sin6 = (struct sockaddr_in6 *) (addr + 1);
+		sin6->sin6_family = AF_INET6;
+		sin6->sin6_port = 0;
+		sin6->sin6_flowinfo = 0;
+		memcpy(&sin6->sin6_addr,
+		       x->props.saddr.a6, sizeof(struct in6_addr));
+		sin6->sin6_scope_id = 0;
+	}
+#endif
+	else
+		BUG();
+	
+	/* dst address */
+	addr = (struct sadb_address*) skb_put(skb, 
+					      sizeof(struct sadb_address)+sockaddr_size);
+	addr->sadb_address_len =
+		(sizeof(struct sadb_address)+sockaddr_size)/
+			sizeof(uint64_t);
+	addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
+	addr->sadb_address_proto = 0;
+	addr->sadb_address_reserved = 0;
+	if (x->props.family == AF_INET) {
+		addr->sadb_address_prefixlen = 32; 
+
+		sin = (struct sockaddr_in *) (addr + 1);
+		sin->sin_family = AF_INET;
+		sin->sin_addr.s_addr = x->id.daddr.a4;
+		sin->sin_port = 0;
+		memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+	}
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	else if (x->props.family == AF_INET6) {
+		addr->sadb_address_prefixlen = 128; 
+
+		sin6 = (struct sockaddr_in6 *) (addr + 1);
+		sin6->sin6_family = AF_INET6;
+		sin6->sin6_port = 0;
+		sin6->sin6_flowinfo = 0;
+		memcpy(&sin6->sin6_addr,
+		       x->id.daddr.a6, sizeof(struct in6_addr));
+		sin6->sin6_scope_id = 0;
+	}
+#endif
+	else
+		BUG();
+
+	pol = (struct sadb_x_policy *)  skb_put(skb, sizeof(struct sadb_x_policy));
+	pol->sadb_x_policy_len = sizeof(struct sadb_x_policy)/sizeof(uint64_t);
+	pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
+	pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
+	pol->sadb_x_policy_dir = dir+1;
+	pol->sadb_x_policy_id = xp->index;
+
+	/* Set sadb_comb's. */
+	if (x->id.proto == IPPROTO_AH)
+		dump_ah_combs(skb, t);
+	else if (x->id.proto == IPPROTO_ESP)
+		dump_esp_combs(skb, t);
+
+	return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
+}
+
+static struct xfrm_policy *pfkey_compile_policy(u16 family, int opt,
+                                                u8 *data, int len, int *dir)
+{
+	struct xfrm_policy *xp;
+	struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
+
+	switch (family) {
+	case AF_INET:
+		if (opt != IP_IPSEC_POLICY) {
+			*dir = -EOPNOTSUPP;
+			return NULL;
+		}
+		break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	case AF_INET6:
+		if (opt != IPV6_IPSEC_POLICY) {
+			*dir = -EOPNOTSUPP;
+			return NULL;
+		}
+		break;
+#endif
+	default:
+		*dir = -EINVAL;
+		return NULL;
+	}
+
+	*dir = -EINVAL;
+
+	if (len < sizeof(struct sadb_x_policy) ||
+	    pol->sadb_x_policy_len*8 > len ||
+	    pol->sadb_x_policy_type > IPSEC_POLICY_BYPASS ||
+	    (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
+		return NULL;
+
+	xp = xfrm_policy_alloc(GFP_ATOMIC);
+	if (xp == NULL) {
+		*dir = -ENOBUFS;
+		return NULL;
+	}
+
+	xp->action = (pol->sadb_x_policy_type == IPSEC_POLICY_DISCARD ?
+		      XFRM_POLICY_BLOCK : XFRM_POLICY_ALLOW);
+
+	xp->lft.soft_byte_limit = XFRM_INF;
+	xp->lft.hard_byte_limit = XFRM_INF;
+	xp->lft.soft_packet_limit = XFRM_INF;
+	xp->lft.hard_packet_limit = XFRM_INF;
+	xp->family = family;
+
+	xp->xfrm_nr = 0;
+	if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
+	    (*dir = parse_ipsecrequests(xp, pol)) < 0)
+		goto out;
+
+	*dir = pol->sadb_x_policy_dir-1;
+	return xp;
+
+out:
+	kfree(xp);
+	return NULL;
+}
+
+static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport)
+{
+	struct sk_buff *skb;
+	struct sadb_msg *hdr;
+	struct sadb_sa *sa;
+	struct sadb_address *addr;
+	struct sadb_x_nat_t_port *n_port;
+	struct sockaddr_in *sin;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	struct sockaddr_in6 *sin6;
+#endif
+	int sockaddr_size;
+	int size;
+	__u8 satype = (x->id.proto == IPPROTO_ESP ? SADB_SATYPE_ESP : 0);
+	struct xfrm_encap_tmpl *natt = NULL;
+
+	sockaddr_size = pfkey_sockaddr_size(x->props.family);
+	if (!sockaddr_size)
+		return -EINVAL;
+
+	if (!satype)
+		return -EINVAL;
+
+	if (!x->encap)
+		return -EINVAL;
+
+	natt = x->encap;
+
+	/* Build an SADB_X_NAT_T_NEW_MAPPING message:
+	 *
+	 * HDR | SA | ADDRESS_SRC (old addr) | NAT_T_SPORT (old port) |
+	 * ADDRESS_DST (new addr) | NAT_T_DPORT (new port)
+	 */
+	
+	size = sizeof(struct sadb_msg) +
+		sizeof(struct sadb_sa) +
+		(sizeof(struct sadb_address) * 2) +
+		(sockaddr_size * 2) +
+		(sizeof(struct sadb_x_nat_t_port) * 2);
+	
+	skb =  alloc_skb(size + 16, GFP_ATOMIC);
+	if (skb == NULL)
+		return -ENOMEM;
+	
+	hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
+	hdr->sadb_msg_version = PF_KEY_V2;
+	hdr->sadb_msg_type = SADB_X_NAT_T_NEW_MAPPING;
+	hdr->sadb_msg_satype = satype;
+	hdr->sadb_msg_len = size / sizeof(uint64_t);
+	hdr->sadb_msg_errno = 0;
+	hdr->sadb_msg_reserved = 0;
+	hdr->sadb_msg_seq = x->km.seq = get_acqseq();
+	hdr->sadb_msg_pid = 0;
+
+	/* SA */
+	sa = (struct sadb_sa *) skb_put(skb, sizeof(struct sadb_sa));
+	sa->sadb_sa_len = sizeof(struct sadb_sa)/sizeof(uint64_t);
+	sa->sadb_sa_exttype = SADB_EXT_SA;
+	sa->sadb_sa_spi = x->id.spi;
+	sa->sadb_sa_replay = 0;
+	sa->sadb_sa_state = 0;
+	sa->sadb_sa_auth = 0;
+	sa->sadb_sa_encrypt = 0;
+	sa->sadb_sa_flags = 0;
+
+	/* ADDRESS_SRC (old addr) */
+	addr = (struct sadb_address*)
+		skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
+	addr->sadb_address_len = 
+		(sizeof(struct sadb_address)+sockaddr_size)/
+			sizeof(uint64_t);
+	addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
+	addr->sadb_address_proto = 0;
+	addr->sadb_address_reserved = 0;
+	if (x->props.family == AF_INET) {
+		addr->sadb_address_prefixlen = 32;
+
+		sin = (struct sockaddr_in *) (addr + 1);
+		sin->sin_family = AF_INET;
+		sin->sin_addr.s_addr = x->props.saddr.a4;
+		sin->sin_port = 0;
+		memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+	}
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	else if (x->props.family == AF_INET6) {
+		addr->sadb_address_prefixlen = 128;
+
+		sin6 = (struct sockaddr_in6 *) (addr + 1);
+		sin6->sin6_family = AF_INET6;
+		sin6->sin6_port = 0;
+		sin6->sin6_flowinfo = 0;
+		memcpy(&sin6->sin6_addr,
+		       x->props.saddr.a6, sizeof(struct in6_addr));
+		sin6->sin6_scope_id = 0;
+	}
+#endif
+	else
+		BUG();
+
+	/* NAT_T_SPORT (old port) */
+	n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
+	n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
+	n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
+	n_port->sadb_x_nat_t_port_port = natt->encap_sport;
+	n_port->sadb_x_nat_t_port_reserved = 0;
+
+	/* ADDRESS_DST (new addr) */
+	addr = (struct sadb_address*)
+		skb_put(skb, sizeof(struct sadb_address)+sockaddr_size);
+	addr->sadb_address_len = 
+		(sizeof(struct sadb_address)+sockaddr_size)/
+			sizeof(uint64_t);
+	addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
+	addr->sadb_address_proto = 0;
+	addr->sadb_address_reserved = 0;
+	if (x->props.family == AF_INET) {
+		addr->sadb_address_prefixlen = 32;
+
+		sin = (struct sockaddr_in *) (addr + 1);
+		sin->sin_family = AF_INET;
+		sin->sin_addr.s_addr = ipaddr->a4;
+		sin->sin_port = 0;
+		memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+	}
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	else if (x->props.family == AF_INET6) {
+		addr->sadb_address_prefixlen = 128;
+
+		sin6 = (struct sockaddr_in6 *) (addr + 1);
+		sin6->sin6_family = AF_INET6;
+		sin6->sin6_port = 0;
+		sin6->sin6_flowinfo = 0;
+		memcpy(&sin6->sin6_addr, &ipaddr->a6, sizeof(struct in6_addr));
+		sin6->sin6_scope_id = 0;
+	}
+#endif
+	else
+		BUG();
+
+	/* NAT_T_DPORT (new port) */
+	n_port = (struct sadb_x_nat_t_port*) skb_put(skb, sizeof (*n_port));
+	n_port->sadb_x_nat_t_port_len = sizeof(*n_port)/sizeof(uint64_t);
+	n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_DPORT;
+	n_port->sadb_x_nat_t_port_port = sport;
+	n_port->sadb_x_nat_t_port_reserved = 0;
+
+	return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
+}
+
+static int pfkey_sendmsg(struct kiocb *kiocb,
+			 struct socket *sock, struct msghdr *msg, size_t len)
+{
+	struct sock *sk = sock->sk;
+	struct sk_buff *skb = NULL;
+	struct sadb_msg *hdr = NULL;
+	int err;
+
+	err = -EOPNOTSUPP;
+	if (msg->msg_flags & MSG_OOB)
+		goto out;
+
+	err = -EMSGSIZE;
+	if ((unsigned)len > sk->sk_sndbuf - 32)
+		goto out;
+
+	err = -ENOBUFS;
+	skb = alloc_skb(len, GFP_KERNEL);
+	if (skb == NULL)
+		goto out;
+
+	err = -EFAULT;
+	if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len))
+		goto out;
+
+	hdr = pfkey_get_base_msg(skb, &err);
+	if (!hdr)
+		goto out;
+
+	down(&xfrm_cfg_sem);
+	err = pfkey_process(sk, skb, hdr);
+	up(&xfrm_cfg_sem);
+
+out:
+	if (err && hdr && pfkey_error(hdr, err, sk) == 0)
+		err = 0;
+	if (skb)
+		kfree_skb(skb);
+
+	return err ? : len;
+}
+
+static int pfkey_recvmsg(struct kiocb *kiocb,
+			 struct socket *sock, struct msghdr *msg, size_t len,
+			 int flags)
+{
+	struct sock *sk = sock->sk;
+	struct sk_buff *skb;
+	int copied, err;
+
+	err = -EINVAL;
+	if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
+		goto out;
+
+	msg->msg_namelen = 0;
+	skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
+	if (skb == NULL)
+		goto out;
+
+	copied = skb->len;
+	if (copied > len) {
+		msg->msg_flags |= MSG_TRUNC;
+		copied = len;
+	}
+
+	skb->h.raw = skb->data;
+	err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
+	if (err)
+		goto out_free;
+
+	sock_recv_timestamp(msg, sk, skb);
+
+	err = (flags & MSG_TRUNC) ? skb->len : copied;
+
+out_free:
+	skb_free_datagram(sk, skb);
+out:
+	return err;
+}
+
+static struct proto_ops pfkey_ops = {
+	.family		=	PF_KEY,
+	.owner		=	THIS_MODULE,
+	/* Operations that make no sense on pfkey sockets. */
+	.bind		=	sock_no_bind,
+	.connect	=	sock_no_connect,
+	.socketpair	=	sock_no_socketpair,
+	.accept		=	sock_no_accept,
+	.getname	=	sock_no_getname,
+	.ioctl		=	sock_no_ioctl,
+	.listen		=	sock_no_listen,
+	.shutdown	=	sock_no_shutdown,
+	.setsockopt	=	sock_no_setsockopt,
+	.getsockopt	=	sock_no_getsockopt,
+	.mmap		=	sock_no_mmap,
+	.sendpage	=	sock_no_sendpage,
+
+	/* Now the operations that really occur. */
+	.release	=	pfkey_release,
+	.poll		=	datagram_poll,
+	.sendmsg	=	pfkey_sendmsg,
+	.recvmsg	=	pfkey_recvmsg,
+};
+
+static struct net_proto_family pfkey_family_ops = {
+	.family	=	PF_KEY,
+	.create	=	pfkey_create,
+	.owner	=	THIS_MODULE,
+};
+
+#ifdef CONFIG_PROC_FS
+static int pfkey_read_proc(char *buffer, char **start, off_t offset,
+			   int length, int *eof, void *data)
+{
+	off_t pos = 0;
+	off_t begin = 0;
+	int len = 0;
+	struct sock *s;
+	struct hlist_node *node;
+
+	len += sprintf(buffer,"sk       RefCnt Rmem   Wmem   User   Inode\n");
+
+	read_lock(&pfkey_table_lock);
+
+	sk_for_each(s, node, &pfkey_table) {
+		len += sprintf(buffer+len,"%p %-6d %-6u %-6u %-6u %-6lu",
+			       s,
+			       atomic_read(&s->sk_refcnt),
+			       atomic_read(&s->sk_rmem_alloc),
+			       atomic_read(&s->sk_wmem_alloc),
+			       sock_i_uid(s),
+			       sock_i_ino(s)
+			       );
+
+		buffer[len++] = '\n';
+		
+		pos = begin + len;
+		if (pos < offset) {
+			len = 0;
+			begin = pos;
+		}
+		if(pos > offset + length)
+			goto done;
+	}
+	*eof = 1;
+
+done:
+	read_unlock(&pfkey_table_lock);
+
+	*start = buffer + (offset - begin);
+	len -= (offset - begin);
+
+	if (len > length)
+		len = length;
+	if (len < 0)
+		len = 0;
+
+	return len;
+}
+#endif
+
+static struct xfrm_mgr pfkeyv2_mgr =
+{
+	.id		= "pfkeyv2",
+	.notify		= pfkey_send_notify,
+	.acquire	= pfkey_send_acquire,
+	.compile_policy	= pfkey_compile_policy,
+	.new_mapping	= pfkey_send_new_mapping,
+};
+
+static void __exit ipsec_pfkey_exit(void)
+{
+	xfrm_unregister_km(&pfkeyv2_mgr);
+	remove_proc_entry("net/pfkey", NULL);
+	sock_unregister(PF_KEY);
+	proto_unregister(&key_proto);
+}
+
+static int __init ipsec_pfkey_init(void)
+{
+	int err = proto_register(&key_proto, 0);
+
+	if (err != 0)
+		goto out;
+
+	err = sock_register(&pfkey_family_ops);
+	if (err != 0)
+		goto out_unregister_key_proto;
+#ifdef CONFIG_PROC_FS
+	err = -ENOMEM;
+	if (create_proc_read_entry("net/pfkey", 0, NULL, pfkey_read_proc, NULL) == NULL)
+		goto out_sock_unregister;
+#endif
+	err = xfrm_register_km(&pfkeyv2_mgr);
+	if (err != 0)
+		goto out_remove_proc_entry;
+out:
+	return err;
+out_remove_proc_entry:
+#ifdef CONFIG_PROC_FS
+	remove_proc_entry("net/pfkey", NULL);
+out_sock_unregister:
+#endif
+	sock_unregister(PF_KEY);
+out_unregister_key_proto:
+	proto_unregister(&key_proto);
+	goto out;
+}
+
+module_init(ipsec_pfkey_init);
+module_exit(ipsec_pfkey_exit);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_NETPROTO(PF_KEY);