af_key.c 99.4 KB
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/*
 * 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>
 */

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#include <linux/capability.h>
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#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>
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#include <net/net_namespace.h>
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#include <net/netns/generic.h>
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#include <net/xfrm.h>

#include <net/sock.h>

#define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x))
#define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x))

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static int pfkey_net_id __read_mostly;
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struct netns_pfkey {
	/* List of all pfkey sockets. */
	struct hlist_head table;
	atomic_t socks_nr;
};
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static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait);
static DEFINE_RWLOCK(pfkey_table_lock);
static atomic_t pfkey_table_users = ATOMIC_INIT(0);

struct pfkey_sock {
	/* struct sock must be the first member of struct pfkey_sock */
	struct sock	sk;
	int		registered;
	int		promisc;
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	struct {
		uint8_t		msg_version;
		uint32_t	msg_pid;
		int		(*dump)(struct pfkey_sock *sk);
		void		(*done)(struct pfkey_sock *sk);
		union {
			struct xfrm_policy_walk	policy;
			struct xfrm_state_walk	state;
		} u;
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		struct sk_buff	*skb;
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	} dump;
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};

static inline struct pfkey_sock *pfkey_sk(struct sock *sk)
{
	return (struct pfkey_sock *)sk;
}

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static int pfkey_can_dump(struct sock *sk)
{
	if (3 * atomic_read(&sk->sk_rmem_alloc) <= 2 * sk->sk_rcvbuf)
		return 1;
	return 0;
}

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static void pfkey_terminate_dump(struct pfkey_sock *pfk)
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{
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	if (pfk->dump.dump) {
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		if (pfk->dump.skb) {
			kfree_skb(pfk->dump.skb);
			pfk->dump.skb = NULL;
		}
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		pfk->dump.done(pfk);
		pfk->dump.dump = NULL;
		pfk->dump.done = NULL;
	}
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}

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static void pfkey_sock_destruct(struct sock *sk)
{
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	struct net *net = sock_net(sk);
	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);

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	pfkey_terminate_dump(pfkey_sk(sk));
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	skb_queue_purge(&sk->sk_receive_queue);

	if (!sock_flag(sk, SOCK_DEAD)) {
		printk("Attempt to release alive pfkey socket: %p\n", sk);
		return;
	}

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	WARN_ON(atomic_read(&sk->sk_rmem_alloc));
	WARN_ON(atomic_read(&sk->sk_wmem_alloc));
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	atomic_dec(&net_pfkey->socks_nr);
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}

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);
}


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static const struct proto_ops pfkey_ops;
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static void pfkey_insert(struct sock *sk)
{
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	struct net *net = sock_net(sk);
	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);

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	pfkey_table_grab();
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	sk_add_node(sk, &net_pfkey->table);
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	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),
};

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static int pfkey_create(struct net *net, struct socket *sock, int protocol,
			int kern)
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{
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	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
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	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;
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	sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto);
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	if (sk == NULL)
		goto out;
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	sock->ops = &pfkey_ops;
	sock_init_data(sock, sk);

	sk->sk_family = PF_KEY;
	sk->sk_destruct = pfkey_sock_destruct;

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	atomic_inc(&net_pfkey->socks_nr);
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	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,
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			       gfp_t allocation, struct sock *sk)
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{
	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
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static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
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			   int broadcast_flags, struct sock *one_sk,
			   struct net *net)
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{
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	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
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	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();
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	sk_for_each(sk, node, &net_pfkey->table) {
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		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);

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	kfree_skb(skb2);
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	kfree_skb(skb);
	return err;
}

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static int pfkey_do_dump(struct pfkey_sock *pfk)
{
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	struct sadb_msg *hdr;
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	int rc;

	rc = pfk->dump.dump(pfk);
	if (rc == -ENOBUFS)
		return 0;

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	if (pfk->dump.skb) {
		if (!pfkey_can_dump(&pfk->sk))
			return 0;

		hdr = (struct sadb_msg *) pfk->dump.skb->data;
		hdr->sadb_msg_seq = 0;
		hdr->sadb_msg_errno = rc;
		pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
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				&pfk->sk, sock_net(&pfk->sk));
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		pfk->dump.skb = NULL;
	}

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	pfkey_terminate_dump(pfk);
	return rc;
}

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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;
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	BUG_ON(err <= 0 || err >= 256);
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	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));

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	pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk));
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	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),
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	[SADB_X_EXT_SEC_CTX]		= (u8) sizeof(struct sadb_x_sec_ctx),
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	[SADB_X_EXT_KMADDRESS]		= (u8) sizeof(struct sadb_x_kmaddress),
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};

/* 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:
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		len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin), sizeof(uint64_t));
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		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:
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		len = DIV_ROUND_UP(sizeof(*sp) + sizeof(*sin6), sizeof(uint64_t));
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		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;
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	}
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	return 0;
}

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static inline int pfkey_sec_ctx_len(struct sadb_x_sec_ctx *sec_ctx)
{
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	return DIV_ROUND_UP(sizeof(struct sadb_x_sec_ctx) +
			    sec_ctx->sadb_x_ctx_len,
			    sizeof(uint64_t));
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}

static inline int verify_sec_ctx_len(void *p)
{
	struct sadb_x_sec_ctx *sec_ctx = (struct sadb_x_sec_ctx *)p;
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	int len = sec_ctx->sadb_x_ctx_len;
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	if (len > PAGE_SIZE)
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		return -EINVAL;

	len = pfkey_sec_ctx_len(sec_ctx);

	if (sec_ctx->sadb_x_sec_len != len)
		return -EINVAL;

	return 0;
}

static inline struct xfrm_user_sec_ctx *pfkey_sadb2xfrm_user_sec_ctx(struct sadb_x_sec_ctx *sec_ctx)
{
	struct xfrm_user_sec_ctx *uctx = NULL;
	int ctx_size = sec_ctx->sadb_x_ctx_len;

	uctx = kmalloc((sizeof(*uctx)+ctx_size), GFP_KERNEL);

	if (!uctx)
		return NULL;

	uctx->len = pfkey_sec_ctx_len(sec_ctx);
	uctx->exttype = sec_ctx->sadb_x_sec_exttype;
	uctx->ctx_doi = sec_ctx->sadb_x_ctx_doi;
	uctx->ctx_alg = sec_ctx->sadb_x_ctx_alg;
	uctx->ctx_len = sec_ctx->sadb_x_ctx_len;
	memcpy(uctx + 1, sec_ctx + 1,
	       uctx->ctx_len);

	return uctx;
}

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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;
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			}
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			if (ext_type == SADB_X_EXT_SEC_CTX) {
				if (verify_sec_ctx_len(p))
					return -EINVAL;
			}
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			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);
}

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static inline int pfkey_sockaddr_len(sa_family_t family)
{
	switch (family) {
	case AF_INET:
		return sizeof(struct sockaddr_in);
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
	case AF_INET6:
		return sizeof(struct sockaddr_in6);
#endif
	}
	return 0;
}

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static
int pfkey_sockaddr_extract(const struct sockaddr *sa, xfrm_address_t *xaddr)
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{
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	switch (sa->sa_family) {
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	case AF_INET:
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		xaddr->a4 =
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			((struct sockaddr_in *)sa)->sin_addr.s_addr;
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		return AF_INET;
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
	case AF_INET6:
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		memcpy(xaddr->a6,
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		       &((struct sockaddr_in6 *)sa)->sin6_addr,
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		       sizeof(struct in6_addr));
		return AF_INET6;
#endif
	}
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	return 0;
}

static
int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr, xfrm_address_t *xaddr)
{
	return pfkey_sockaddr_extract((struct sockaddr *)(addr + 1),
				      xaddr);
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}

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static struct  xfrm_state *pfkey_xfrm_state_lookup(struct net *net, struct sadb_msg *hdr, void **ext_hdrs)
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{
	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;

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	return xfrm_state_lookup(net, xaddr, sa->sadb_sa_spi, proto, family);
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}

#define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
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static int
pfkey_sockaddr_size(sa_family_t family)
{
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	return PFKEY_ALIGN8(pfkey_sockaddr_len(family));
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}

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static inline int pfkey_mode_from_xfrm(int mode)
{
	switch(mode) {
	case XFRM_MODE_TRANSPORT:
		return IPSEC_MODE_TRANSPORT;
	case XFRM_MODE_TUNNEL:
		return IPSEC_MODE_TUNNEL;
	case XFRM_MODE_BEET:
		return IPSEC_MODE_BEET;
	default:
		return -1;
	}
}

static inline int pfkey_mode_to_xfrm(int mode)
{
	switch(mode) {
	case IPSEC_MODE_ANY:	/*XXX*/
	case IPSEC_MODE_TRANSPORT:
		return XFRM_MODE_TRANSPORT;
	case IPSEC_MODE_TUNNEL:
		return XFRM_MODE_TUNNEL;
	case IPSEC_MODE_BEET:
		return XFRM_MODE_BEET;
	default:
		return -1;
	}
}

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static unsigned int pfkey_sockaddr_fill(xfrm_address_t *xaddr, __be16 port,
				       struct sockaddr *sa,
				       unsigned short family)
{
	switch (family) {
	case AF_INET:
	    {
		struct sockaddr_in *sin = (struct sockaddr_in *)sa;
		sin->sin_family = AF_INET;
		sin->sin_port = port;
		sin->sin_addr.s_addr = xaddr->a4;
		memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
		return 32;
	    }
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
	case AF_INET6:
	    {
		struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
		sin6->sin6_family = AF_INET6;
		sin6->sin6_port = port;
		sin6->sin6_flowinfo = 0;
		ipv6_addr_copy(&sin6->sin6_addr, (struct in6_addr *)xaddr->a6);
		sin6->sin6_scope_id = 0;
		return 128;
	    }
#endif
	}
	return 0;
}

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static struct sk_buff *__pfkey_xfrm_state2msg(struct xfrm_state *x,
					      int add_keys, int hsc)
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{
	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;
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	struct sadb_x_sec_ctx *sec_ctx;
	struct xfrm_sec_ctx *xfrm_ctx;
	int ctx_size = 0;
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	int size;
	int auth_key_size = 0;
	int encrypt_key_size = 0;
	int sockaddr_size;
	struct xfrm_encap_tmpl *natt = NULL;
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	int mode;
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	/* 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)> */
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	size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
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		sizeof(struct sadb_lifetime) +
		((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
		((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
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			sizeof(struct sadb_address)*2 +
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				sockaddr_size*2 +
					sizeof(struct sadb_x_sa2);
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	if ((xfrm_ctx = x->security)) {
		ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
		size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
	}

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	/* identity & sensitivity */
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	if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr, x->props.family))
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		size += sizeof(struct sadb_address) + sockaddr_size;

	if (add_keys) {
		if (x->aalg && x->aalg->alg_key_len) {
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			auth_key_size =
				PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
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			size += sizeof(struct sadb_key) + auth_key_size;
		}
		if (x->ealg && x->ealg->alg_key_len) {
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			encrypt_key_size =
				PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
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			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;
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	switch (x->km.state) {
	case XFRM_STATE_VALID:
		sa->sadb_sa_state = x->km.dying ?
			SADB_SASTATE_DYING : SADB_SASTATE_MATURE;
		break;
	case XFRM_STATE_ACQ:
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		sa->sadb_sa_state = SADB_SASTATE_LARVAL;
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		break;
	default:
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		sa->sadb_sa_state = SADB_SASTATE_DEAD;
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		break;
	}
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	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;
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	if (x->props.flags & XFRM_STATE_NOPMTUDISC)
		sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;
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	/* hard time */
	if (hsc & 2) {
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		lifetime = (struct sadb_lifetime *)  skb_put(skb,
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							     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) {
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		lifetime = (struct sadb_lifetime *)  skb_put(skb,
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							     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 */
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	addr = (struct sadb_address*) skb_put(skb,
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					      sizeof(struct sadb_address)+sockaddr_size);
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	addr->sadb_address_len =
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		(sizeof(struct sadb_address)+sockaddr_size)/
			sizeof(uint64_t);
	addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
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	/* "if the ports are non-zero, then the sadb_address_proto field,
	   normally zero, MUST be filled in with the transport
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	   protocol's number." - RFC2367 */
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	addr->sadb_address_proto = 0;
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	addr->sadb_address_reserved = 0;

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	addr->sadb_address_prefixlen =
		pfkey_sockaddr_fill(&x->props.saddr, 0,
				    (struct sockaddr *) (addr + 1),
				    x->props.family);
	if (!addr->sadb_address_prefixlen)
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		BUG();

	/* dst address */
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	addr = (struct sadb_address*) skb_put(skb,
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					      sizeof(struct sadb_address)+sockaddr_size);
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	addr->sadb_address_len =
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		(sizeof(struct sadb_address)+sockaddr_size)/
			sizeof(uint64_t);
	addr->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
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	addr->sadb_address_proto = 0;
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	addr->sadb_address_reserved = 0;

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	addr->sadb_address_prefixlen =
		pfkey_sockaddr_fill(&x->id.daddr, 0,
				    (struct sockaddr *) (addr + 1),
				    x->props.family);
	if (!addr->sadb_address_prefixlen)
		BUG();
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	if (xfrm_addr_cmp(&x->sel.saddr, &x->props.saddr,
			  x->props.family)) {
		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;
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		pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
				    (struct sockaddr *) (addr + 1),
				    x->props.family);
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	}

	/* auth key */
	if (add_keys && auth_key_size) {
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		key = (struct sadb_key *) skb_put(skb,
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						  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) {
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		key = (struct sadb_key *) skb_put(skb,
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						  sizeof(struct sadb_key)+encrypt_key_size);
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		key->sadb_key_len = (sizeof(struct sadb_key) +
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				     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;
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		memcpy(key + 1, x->ealg->alg_key,
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		       (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;
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	if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
		kfree_skb(skb);
		return ERR_PTR(-EINVAL);
	}
	sa2->sadb_x_sa2_mode = mode;
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	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;
	}

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	/* security context */
	if (xfrm_ctx) {
		sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
				sizeof(struct sadb_x_sec_ctx) + ctx_size);
		sec_ctx->sadb_x_sec_len =
		  (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
		sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
		sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
		sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
		sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
		memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
		       xfrm_ctx->ctx_len);
	}

L
Linus Torvalds 已提交
1050 1051 1052
	return skb;
}

1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068

static inline struct sk_buff *pfkey_xfrm_state2msg(struct xfrm_state *x)
{
	struct sk_buff *skb;

	skb = __pfkey_xfrm_state2msg(x, 1, 3);

	return skb;
}

static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x,
							  int hsc)
{
	return __pfkey_xfrm_state2msg(x, 0, hsc);
}

A
Alexey Dobriyan 已提交
1069 1070
static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
						struct sadb_msg *hdr,
L
Linus Torvalds 已提交
1071 1072
						void **ext_hdrs)
{
1073
	struct xfrm_state *x;
L
Linus Torvalds 已提交
1074 1075 1076
	struct sadb_lifetime *lifetime;
	struct sadb_sa *sa;
	struct sadb_key *key;
1077
	struct sadb_x_sec_ctx *sec_ctx;
L
Linus Torvalds 已提交
1078 1079
	uint16_t proto;
	int err;
1080

L
Linus Torvalds 已提交
1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112

	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.

1113
	   However, KAME setkey always uses SADB_SASTATE_LARVAL.
L
Linus Torvalds 已提交
1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133
	   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);

A
Alexey Dobriyan 已提交
1134
	x = xfrm_state_alloc(net);
L
Linus Torvalds 已提交
1135 1136 1137 1138 1139 1140 1141 1142 1143 1144
	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;
1145 1146
	if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
		x->props.flags |= XFRM_STATE_NOPMTUDISC;
L
Linus Torvalds 已提交
1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161

	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;
	}
1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176

	sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
	if (sec_ctx != NULL) {
		struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);

		if (!uctx)
			goto out;

		err = security_xfrm_state_alloc(x, uctx);
		kfree(uctx);

		if (err)
			goto out;
	}

L
Linus Torvalds 已提交
1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195
	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);
		}
1196
		x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
L
Linus Torvalds 已提交
1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235
		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; */

1236
	x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
L
Linus Torvalds 已提交
1237 1238 1239 1240 1241
						    &x->props.saddr);
	if (!x->props.family) {
		err = -EAFNOSUPPORT;
		goto out;
	}
1242
	pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
L
Linus Torvalds 已提交
1243 1244 1245 1246
				  &x->id.daddr);

	if (ext_hdrs[SADB_X_EXT_SA2-1]) {
		struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1247 1248 1249 1250 1251 1252
		int mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
		if (mode < 0) {
			err = -EINVAL;
			goto out;
		}
		x->props.mode = mode;
L
Linus Torvalds 已提交
1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263
		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;
	}

1264
	if (!x->sel.family)
1265 1266
		x->sel.family = x->props.family;

L
Linus Torvalds 已提交
1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288
	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;
		}
T
Timo Teras 已提交
1289
		memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
L
Linus Torvalds 已提交
1290 1291
	}

H
Herbert Xu 已提交
1292 1293
	err = xfrm_init_state(x);
	if (err)
L
Linus Torvalds 已提交
1294
		goto out;
H
Herbert Xu 已提交
1295

L
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1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311
	x->km.seq = hdr->sadb_msg_seq;
	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)
{
A
Alexey Dobriyan 已提交
1312
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
1313 1314 1315 1316
	struct sk_buff *resp_skb;
	struct sadb_x_sa2 *sa2;
	struct sadb_address *saddr, *daddr;
	struct sadb_msg *out_hdr;
1317
	struct sadb_spirange *range;
L
Linus Torvalds 已提交
1318
	struct xfrm_state *x = NULL;
1319
	int mode;
1320 1321
	int err;
	u32 min_spi, max_spi;
L
Linus Torvalds 已提交
1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335
	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) {
1336 1337 1338
		mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
		if (mode < 0)
			return -EINVAL;
L
Linus Torvalds 已提交
1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362
		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) {
A
Alexey Dobriyan 已提交
1363
		x = xfrm_find_acq_byseq(net, hdr->sadb_msg_seq);
L
Linus Torvalds 已提交
1364 1365 1366 1367 1368 1369 1370
		if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
			xfrm_state_put(x);
			x = NULL;
		}
	}

	if (!x)
A
Alexey Dobriyan 已提交
1371
		x = xfrm_find_acq(net, mode, reqid, proto, xdaddr, xsaddr, 1, family);
L
Linus Torvalds 已提交
1372 1373 1374 1375

	if (x == NULL)
		return -ENOENT;

1376 1377
	min_spi = 0x100;
	max_spi = 0x0fffffff;
L
Linus Torvalds 已提交
1378

1379 1380 1381 1382
	range = ext_hdrs[SADB_EXT_SPIRANGE-1];
	if (range) {
		min_spi = range->sadb_spirange_min;
		max_spi = range->sadb_spirange_max;
L
Linus Torvalds 已提交
1383
	}
1384 1385

	err = xfrm_alloc_spi(x, min_spi, max_spi);
1386
	resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
L
Linus Torvalds 已提交
1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403

	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);

A
Alexey Dobriyan 已提交
1404
	pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
L
Linus Torvalds 已提交
1405 1406 1407 1408 1409 1410

	return 0;
}

static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
1411
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
1412 1413 1414 1415 1416 1417 1418 1419
	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;

A
Alexey Dobriyan 已提交
1420
	x = xfrm_find_acq_byseq(net, hdr->sadb_msg_seq);
L
Linus Torvalds 已提交
1421 1422 1423 1424 1425 1426
	if (x == NULL)
		return 0;

	spin_lock_bh(&x->lock);
	if (x->km.state == XFRM_STATE_ACQ) {
		x->km.state = XFRM_STATE_ERROR;
A
Alexey Dobriyan 已提交
1427
		wake_up(&net->xfrm.km_waitq);
L
Linus Torvalds 已提交
1428 1429 1430 1431 1432 1433
	}
	spin_unlock_bh(&x->lock);
	xfrm_state_put(x);
	return 0;
}

1434 1435 1436
static inline int event2poltype(int event)
{
	switch (event) {
1437
	case XFRM_MSG_DELPOLICY:
1438
		return SADB_X_SPDDELETE;
1439
	case XFRM_MSG_NEWPOLICY:
1440
		return SADB_X_SPDADD;
1441
	case XFRM_MSG_UPDPOLICY:
1442
		return SADB_X_SPDUPDATE;
1443
	case XFRM_MSG_POLEXPIRE:
1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455
	//	return SADB_X_SPDEXPIRE;
	default:
		printk("pfkey: Unknown policy event %d\n", event);
		break;
	}

	return 0;
}

static inline int event2keytype(int event)
{
	switch (event) {
1456
	case XFRM_MSG_DELSA:
1457
		return SADB_DELETE;
1458
	case XFRM_MSG_NEWSA:
1459
		return SADB_ADD;
1460
	case XFRM_MSG_UPDSA:
1461
		return SADB_UPDATE;
1462
	case XFRM_MSG_EXPIRE:
1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477
		return SADB_EXPIRE;
	default:
		printk("pfkey: Unknown SA event %d\n", event);
		break;
	}

	return 0;
}

/* ADD/UPD/DEL */
static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
{
	struct sk_buff *skb;
	struct sadb_msg *hdr;

1478
	skb = pfkey_xfrm_state2msg(x);
1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491

	if (IS_ERR(skb))
		return PTR_ERR(skb);

	hdr = (struct sadb_msg *) skb->data;
	hdr->sadb_msg_version = PF_KEY_V2;
	hdr->sadb_msg_type = event2keytype(c->event);
	hdr->sadb_msg_satype = pfkey_proto2satype(x->id.proto);
	hdr->sadb_msg_errno = 0;
	hdr->sadb_msg_reserved = 0;
	hdr->sadb_msg_seq = c->seq;
	hdr->sadb_msg_pid = c->pid;

A
Alexey Dobriyan 已提交
1492
	pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
1493 1494 1495

	return 0;
}
L
Linus Torvalds 已提交
1496 1497 1498

static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
1499
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
1500 1501
	struct xfrm_state *x;
	int err;
1502
	struct km_event c;
L
Linus Torvalds 已提交
1503

A
Alexey Dobriyan 已提交
1504
	x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
L
Linus Torvalds 已提交
1505 1506 1507
	if (IS_ERR(x))
		return PTR_ERR(x);

1508
	xfrm_state_hold(x);
L
Linus Torvalds 已提交
1509 1510 1511 1512 1513
	if (hdr->sadb_msg_type == SADB_ADD)
		err = xfrm_state_add(x);
	else
		err = xfrm_state_update(x);

J
Joy Latten 已提交
1514
	xfrm_audit_state_add(x, err ? 0 : 1,
1515 1516
			     audit_get_loginuid(current),
			     audit_get_sessionid(current), 0);
J
Joy Latten 已提交
1517

L
Linus Torvalds 已提交
1518 1519
	if (err < 0) {
		x->km.state = XFRM_STATE_DEAD;
1520
		__xfrm_state_put(x);
1521
		goto out;
L
Linus Torvalds 已提交
1522 1523
	}

1524
	if (hdr->sadb_msg_type == SADB_ADD)
1525
		c.event = XFRM_MSG_NEWSA;
1526
	else
1527
		c.event = XFRM_MSG_UPDSA;
1528 1529 1530
	c.seq = hdr->sadb_msg_seq;
	c.pid = hdr->sadb_msg_pid;
	km_state_notify(x, &c);
1531
out:
1532 1533
	xfrm_state_put(x);
	return err;
L
Linus Torvalds 已提交
1534 1535 1536 1537
}

static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
1538
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
1539
	struct xfrm_state *x;
1540 1541
	struct km_event c;
	int err;
L
Linus Torvalds 已提交
1542 1543 1544 1545 1546 1547

	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;

A
Alexey Dobriyan 已提交
1548
	x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
L
Linus Torvalds 已提交
1549 1550 1551
	if (x == NULL)
		return -ESRCH;

C
Catherine Zhang 已提交
1552 1553 1554
	if ((err = security_xfrm_state_delete(x)))
		goto out;

L
Linus Torvalds 已提交
1555
	if (xfrm_state_kern(x)) {
C
Catherine Zhang 已提交
1556 1557
		err = -EPERM;
		goto out;
L
Linus Torvalds 已提交
1558
	}
J
Joy Latten 已提交
1559

1560
	err = xfrm_state_delete(x);
J
Joy Latten 已提交
1561

C
Catherine Zhang 已提交
1562 1563
	if (err < 0)
		goto out;
L
Linus Torvalds 已提交
1564

1565 1566
	c.seq = hdr->sadb_msg_seq;
	c.pid = hdr->sadb_msg_pid;
1567
	c.event = XFRM_MSG_DELSA;
1568
	km_state_notify(x, &c);
C
Catherine Zhang 已提交
1569
out:
J
Joy Latten 已提交
1570
	xfrm_audit_state_delete(x, err ? 0 : 1,
1571 1572
				audit_get_loginuid(current),
				audit_get_sessionid(current), 0);
1573
	xfrm_state_put(x);
L
Linus Torvalds 已提交
1574

1575
	return err;
L
Linus Torvalds 已提交
1576 1577 1578 1579
}

static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
1580
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
1581 1582 1583 1584 1585 1586 1587 1588 1589 1590
	__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;

A
Alexey Dobriyan 已提交
1591
	x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
L
Linus Torvalds 已提交
1592 1593 1594
	if (x == NULL)
		return -ESRCH;

1595
	out_skb = pfkey_xfrm_state2msg(x);
L
Linus Torvalds 已提交
1596 1597 1598 1599 1600 1601 1602
	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;
1603
	out_hdr->sadb_msg_type = SADB_GET;
L
Linus Torvalds 已提交
1604 1605 1606 1607 1608
	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;
A
Alexey Dobriyan 已提交
1609
	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
L
Linus Torvalds 已提交
1610 1611 1612 1613

	return 0;
}

1614
static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
A
Al Viro 已提交
1615
					      gfp_t allocation)
L
Linus Torvalds 已提交
1616 1617 1618 1619 1620 1621 1622 1623 1624 1625
{
	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);
	}
1626

L
Linus Torvalds 已提交
1627 1628 1629 1630 1631
	enc_len = xfrm_count_enc_supported();
	if (enc_len) {
		enc_len *= sizeof(struct sadb_alg);
		enc_len += sizeof(struct sadb_supported);
	}
1632

L
Linus Torvalds 已提交
1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700
	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();
1701

L
Linus Torvalds 已提交
1702 1703 1704 1705 1706 1707 1708 1709
	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;
	}

A
Alexey Dobriyan 已提交
1710
	pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, sock_net(sk));
L
Linus Torvalds 已提交
1711 1712 1713 1714

	return 0;
}

1715 1716 1717 1718 1719 1720 1721 1722 1723
static int key_notify_sa_flush(struct km_event *c)
{
	struct sk_buff *skb;
	struct sadb_msg *hdr;

	skb = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
	if (!skb)
		return -ENOBUFS;
	hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
1724
	hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
J
Jerome Borsboom 已提交
1725
	hdr->sadb_msg_type = SADB_FLUSH;
1726 1727 1728 1729 1730 1731
	hdr->sadb_msg_seq = c->seq;
	hdr->sadb_msg_pid = c->pid;
	hdr->sadb_msg_version = PF_KEY_V2;
	hdr->sadb_msg_errno = (uint8_t) 0;
	hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));

A
Alexey Dobriyan 已提交
1732
	pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
1733 1734 1735 1736

	return 0;
}

L
Linus Torvalds 已提交
1737 1738
static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
1739
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
1740
	unsigned proto;
1741
	struct km_event c;
J
Joy Latten 已提交
1742
	struct xfrm_audit audit_info;
1743
	int err;
L
Linus Torvalds 已提交
1744 1745 1746 1747 1748

	proto = pfkey_satype2proto(hdr->sadb_msg_satype);
	if (proto == 0)
		return -EINVAL;

1749
	audit_info.loginuid = audit_get_loginuid(current);
1750
	audit_info.sessionid = audit_get_sessionid(current);
J
Joy Latten 已提交
1751
	audit_info.secid = 0;
A
Alexey Dobriyan 已提交
1752
	err = xfrm_state_flush(net, proto, &audit_info);
1753
	if (err)
1754
		return err;
1755
	c.data.proto = proto;
1756 1757
	c.seq = hdr->sadb_msg_seq;
	c.pid = hdr->sadb_msg_pid;
1758
	c.event = XFRM_MSG_FLUSHSA;
A
Alexey Dobriyan 已提交
1759
	c.net = net;
1760
	km_state_notify(NULL, &c);
L
Linus Torvalds 已提交
1761 1762 1763 1764 1765 1766

	return 0;
}

static int dump_sa(struct xfrm_state *x, int count, void *ptr)
{
1767
	struct pfkey_sock *pfk = ptr;
L
Linus Torvalds 已提交
1768 1769 1770
	struct sk_buff *out_skb;
	struct sadb_msg *out_hdr;

1771 1772 1773
	if (!pfkey_can_dump(&pfk->sk))
		return -ENOBUFS;

1774
	out_skb = pfkey_xfrm_state2msg(x);
L
Linus Torvalds 已提交
1775 1776 1777 1778
	if (IS_ERR(out_skb))
		return PTR_ERR(out_skb);

	out_hdr = (struct sadb_msg *) out_skb->data;
1779
	out_hdr->sadb_msg_version = pfk->dump.msg_version;
L
Linus Torvalds 已提交
1780 1781 1782 1783
	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;
H
Herbert Xu 已提交
1784
	out_hdr->sadb_msg_seq = count + 1;
1785
	out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
H
Herbert Xu 已提交
1786 1787 1788

	if (pfk->dump.skb)
		pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
A
Alexey Dobriyan 已提交
1789
				&pfk->sk, sock_net(&pfk->sk));
H
Herbert Xu 已提交
1790 1791
	pfk->dump.skb = out_skb;

L
Linus Torvalds 已提交
1792 1793 1794
	return 0;
}

1795 1796
static int pfkey_dump_sa(struct pfkey_sock *pfk)
{
A
Alexey Dobriyan 已提交
1797 1798
	struct net *net = sock_net(&pfk->sk);
	return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
1799 1800 1801 1802 1803 1804 1805
}

static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
{
	xfrm_state_walk_done(&pfk->dump.u.state);
}

L
Linus Torvalds 已提交
1806 1807 1808
static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
	u8 proto;
1809 1810 1811 1812
	struct pfkey_sock *pfk = pfkey_sk(sk);

	if (pfk->dump.dump != NULL)
		return -EBUSY;
L
Linus Torvalds 已提交
1813 1814 1815 1816 1817

	proto = pfkey_satype2proto(hdr->sadb_msg_satype);
	if (proto == 0)
		return -EINVAL;

1818 1819 1820 1821 1822
	pfk->dump.msg_version = hdr->sadb_msg_version;
	pfk->dump.msg_pid = hdr->sadb_msg_pid;
	pfk->dump.dump = pfkey_dump_sa;
	pfk->dump.done = pfkey_dump_sa_done;
	xfrm_state_walk_init(&pfk->dump.u.state, proto);
1823

1824
	return pfkey_do_dump(pfk);
L
Linus Torvalds 已提交
1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838
}

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;
	}
A
Alexey Dobriyan 已提交
1839
	pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
L
Linus Torvalds 已提交
1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854
	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;
}

A
Alexey Dobriyan 已提交
1855
static u32 gen_reqid(struct net *net)
L
Linus Torvalds 已提交
1856
{
1857
	struct xfrm_policy_walk walk;
L
Linus Torvalds 已提交
1858
	u32 start;
1859
	int rc;
L
Linus Torvalds 已提交
1860 1861 1862 1863 1864 1865 1866
	static u32 reqid = IPSEC_MANUAL_REQID_MAX;

	start = reqid;
	do {
		++reqid;
		if (reqid == 0)
			reqid = IPSEC_MANUAL_REQID_MAX+1;
1867
		xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
A
Alexey Dobriyan 已提交
1868
		rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
1869 1870
		xfrm_policy_walk_done(&walk);
		if (rc != -EEXIST)
L
Linus Torvalds 已提交
1871 1872 1873 1874 1875 1876 1877 1878
			return reqid;
	} while (reqid != start);
	return 0;
}

static int
parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
{
A
Alexey Dobriyan 已提交
1879
	struct net *net = xp_net(xp);
L
Linus Torvalds 已提交
1880
	struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1881
	int mode;
L
Linus Torvalds 已提交
1882 1883 1884 1885 1886 1887 1888 1889

	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 */
1890 1891 1892
	if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
		return -EINVAL;
	t->mode = mode;
L
Linus Torvalds 已提交
1893 1894 1895 1896 1897 1898
	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;
A
Alexey Dobriyan 已提交
1899
		if (!t->reqid && !(t->reqid = gen_reqid(net)))
L
Linus Torvalds 已提交
1900 1901 1902 1903
			return -ENOBUFS;
	}

	/* addresses present only in tunnel mode */
1904
	if (t->mode == XFRM_MODE_TUNNEL) {
1905 1906 1907 1908 1909 1910
		u8 *sa = (u8 *) (rq + 1);
		int family, socklen;

		family = pfkey_sockaddr_extract((struct sockaddr *)sa,
						&t->saddr);
		if (!family)
L
Linus Torvalds 已提交
1911
			return -EINVAL;
1912 1913 1914 1915 1916 1917

		socklen = pfkey_sockaddr_len(family);
		if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen),
					   &t->id.daddr) != family)
			return -EINVAL;
		t->encap_family = family;
1918 1919 1920
	} else
		t->encap_family = xp->family;

L
Linus Torvalds 已提交
1921
	/* No way to set this via kame pfkey */
1922
	t->allalgs = 1;
L
Linus Torvalds 已提交
1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942
	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;
}

1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954
static inline int pfkey_xfrm_policy2sec_ctx_size(struct xfrm_policy *xp)
{
  struct xfrm_sec_ctx *xfrm_ctx = xp->security;

	if (xfrm_ctx) {
		int len = sizeof(struct sadb_x_sec_ctx);
		len += xfrm_ctx->ctx_len;
		return PFKEY_ALIGN8(len);
	}
	return 0;
}

L
Linus Torvalds 已提交
1955 1956
static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
{
1957
	struct xfrm_tmpl *t;
L
Linus Torvalds 已提交
1958
	int sockaddr_size = pfkey_sockaddr_size(xp->family);
1959 1960 1961 1962 1963
	int socklen = 0;
	int i;

	for (i=0; i<xp->xfrm_nr; i++) {
		t = xp->xfrm_vec + i;
1964
		socklen += pfkey_sockaddr_len(t->encap_family);
1965
	}
L
Linus Torvalds 已提交
1966 1967 1968

	return sizeof(struct sadb_msg) +
		(sizeof(struct sadb_lifetime) * 3) +
1969
		(sizeof(struct sadb_address) * 2) +
L
Linus Torvalds 已提交
1970 1971
		(sockaddr_size * 2) +
		sizeof(struct sadb_x_policy) +
1972 1973
		(xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
		(socklen * 2) +
1974
		pfkey_xfrm_policy2sec_ctx_size(xp);
L
Linus Torvalds 已提交
1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990
}

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;
}

1991
static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
L
Linus Torvalds 已提交
1992 1993 1994 1995 1996
{
	struct sadb_msg *hdr;
	struct sadb_address *addr;
	struct sadb_lifetime *lifetime;
	struct sadb_x_policy *pol;
1997 1998
	struct sadb_x_sec_ctx *sec_ctx;
	struct xfrm_sec_ctx *xfrm_ctx;
L
Linus Torvalds 已提交
1999 2000 2001
	int i;
	int size;
	int sockaddr_size = pfkey_sockaddr_size(xp->family);
2002
	int socklen = pfkey_sockaddr_len(xp->family);
L
Linus Torvalds 已提交
2003 2004 2005 2006 2007 2008 2009 2010

	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 */
2011
	addr = (struct sadb_address*) skb_put(skb,
L
Linus Torvalds 已提交
2012
					      sizeof(struct sadb_address)+sockaddr_size);
2013
	addr->sadb_address_len =
L
Linus Torvalds 已提交
2014 2015 2016 2017 2018 2019
		(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;
2020 2021 2022 2023
	if (!pfkey_sockaddr_fill(&xp->selector.saddr,
				 xp->selector.sport,
				 (struct sockaddr *) (addr + 1),
				 xp->family))
L
Linus Torvalds 已提交
2024 2025 2026
		BUG();

	/* dst address */
2027
	addr = (struct sadb_address*) skb_put(skb,
L
Linus Torvalds 已提交
2028 2029 2030 2031 2032 2033
					      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);
2034
	addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
L
Linus Torvalds 已提交
2035
	addr->sadb_address_reserved = 0;
2036 2037 2038 2039

	pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
			    (struct sockaddr *) (addr + 1),
			    xp->family);
L
Linus Torvalds 已提交
2040 2041

	/* hard time */
2042
	lifetime = (struct sadb_lifetime *)  skb_put(skb,
L
Linus Torvalds 已提交
2043 2044 2045 2046 2047 2048 2049 2050 2051
						     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 */
2052
	lifetime = (struct sadb_lifetime *)  skb_put(skb,
L
Linus Torvalds 已提交
2053 2054 2055 2056 2057 2058 2059 2060 2061
						     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 */
2062
	lifetime = (struct sadb_lifetime *)  skb_put(skb,
L
Linus Torvalds 已提交
2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089
						     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;
2090
		int mode;
L
Linus Torvalds 已提交
2091 2092

		req_size = sizeof(struct sadb_x_ipsecrequest);
2093 2094 2095 2096
		if (t->mode == XFRM_MODE_TUNNEL) {
			socklen = pfkey_sockaddr_len(t->encap_family);
			req_size += socklen * 2;
		} else {
L
Linus Torvalds 已提交
2097
			size -= 2*socklen;
2098
		}
L
Linus Torvalds 已提交
2099 2100 2101 2102 2103
		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;
2104 2105
		if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
			return -EINVAL;
2106
		rq->sadb_x_ipsecrequest_mode = mode;
L
Linus Torvalds 已提交
2107 2108 2109 2110 2111 2112
		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;
2113

2114
		if (t->mode == XFRM_MODE_TUNNEL) {
2115 2116 2117 2118 2119 2120 2121
			u8 *sa = (void *)(rq + 1);
			pfkey_sockaddr_fill(&t->saddr, 0,
					    (struct sockaddr *)sa,
					    t->encap_family);
			pfkey_sockaddr_fill(&t->id.daddr, 0,
					    (struct sockaddr *) (sa + socklen),
					    t->encap_family);
L
Linus Torvalds 已提交
2122 2123
		}
	}
2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138

	/* security context */
	if ((xfrm_ctx = xp->security)) {
		int ctx_size = pfkey_xfrm_policy2sec_ctx_size(xp);

		sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb, ctx_size);
		sec_ctx->sadb_x_sec_len = ctx_size / sizeof(uint64_t);
		sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
		sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
		sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
		sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
		memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
		       xfrm_ctx->ctx_len);
	}

L
Linus Torvalds 已提交
2139 2140
	hdr->sadb_msg_len = size / sizeof(uint64_t);
	hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2141 2142

	return 0;
L
Linus Torvalds 已提交
2143 2144
}

2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155
static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
{
	struct sk_buff *out_skb;
	struct sadb_msg *out_hdr;
	int err;

	out_skb = pfkey_xfrm_policy2msg_prep(xp);
	if (IS_ERR(out_skb)) {
		err = PTR_ERR(out_skb);
		goto out;
	}
2156 2157 2158
	err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
	if (err < 0)
		return err;
2159 2160 2161 2162

	out_hdr = (struct sadb_msg *) out_skb->data;
	out_hdr->sadb_msg_version = PF_KEY_V2;

2163
	if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2164 2165 2166 2167 2168 2169
		out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
	else
		out_hdr->sadb_msg_type = event2poltype(c->event);
	out_hdr->sadb_msg_errno = 0;
	out_hdr->sadb_msg_seq = c->seq;
	out_hdr->sadb_msg_pid = c->pid;
A
Alexey Dobriyan 已提交
2170
	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
2171 2172 2173 2174 2175
out:
	return 0;

}

L
Linus Torvalds 已提交
2176 2177
static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
2178
	struct net *net = sock_net(sk);
2179
	int err = 0;
L
Linus Torvalds 已提交
2180 2181 2182 2183
	struct sadb_lifetime *lifetime;
	struct sadb_address *sa;
	struct sadb_x_policy *pol;
	struct xfrm_policy *xp;
2184
	struct km_event c;
2185
	struct sadb_x_sec_ctx *sec_ctx;
L
Linus Torvalds 已提交
2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197

	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;

A
Alexey Dobriyan 已提交
2198
	xp = xfrm_policy_alloc(net, GFP_KERNEL);
L
Linus Torvalds 已提交
2199 2200 2201 2202 2203 2204 2205
	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;

2206
	sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
L
Linus Torvalds 已提交
2207 2208 2209 2210 2211 2212 2213 2214 2215 2216
	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)
2217
		xp->selector.sport_mask = htons(0xffff);
L
Linus Torvalds 已提交
2218

2219
	sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
L
Linus Torvalds 已提交
2220 2221 2222 2223 2224 2225 2226 2227 2228 2229
	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)
2230
		xp->selector.dport_mask = htons(0xffff);
L
Linus Torvalds 已提交
2231

2232 2233 2234 2235 2236 2237 2238 2239 2240
	sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
	if (sec_ctx != NULL) {
		struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);

		if (!uctx) {
			err = -ENOBUFS;
			goto out;
		}

2241
		err = security_xfrm_policy_alloc(&xp->security, uctx);
2242 2243 2244 2245 2246 2247
		kfree(uctx);

		if (err)
			goto out;
	}

L
Linus Torvalds 已提交
2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270
	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;

	err = xfrm_policy_insert(pol->sadb_x_policy_dir-1, xp,
				 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2271

J
Joy Latten 已提交
2272
	xfrm_audit_policy_add(xp, err ? 0 : 1,
2273 2274
			      audit_get_loginuid(current),
			      audit_get_sessionid(current), 0);
J
Joy Latten 已提交
2275

2276 2277
	if (err)
		goto out;
L
Linus Torvalds 已提交
2278

2279
	if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2280
		c.event = XFRM_MSG_UPDPOLICY;
2281
	else
2282
		c.event = XFRM_MSG_NEWPOLICY;
L
Linus Torvalds 已提交
2283

2284 2285
	c.seq = hdr->sadb_msg_seq;
	c.pid = hdr->sadb_msg_pid;
L
Linus Torvalds 已提交
2286

2287 2288
	km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
	xfrm_pol_put(xp);
L
Linus Torvalds 已提交
2289 2290 2291
	return 0;

out:
H
Herbert Xu 已提交
2292
	xp->walk.dead = 1;
2293
	xfrm_policy_destroy(xp);
L
Linus Torvalds 已提交
2294 2295 2296 2297 2298
	return err;
}

static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
2299
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
2300 2301 2302
	int err;
	struct sadb_address *sa;
	struct sadb_x_policy *pol;
2303
	struct xfrm_policy *xp;
L
Linus Torvalds 已提交
2304
	struct xfrm_selector sel;
2305
	struct km_event c;
2306
	struct sadb_x_sec_ctx *sec_ctx;
2307
	struct xfrm_sec_ctx *pol_ctx = NULL;
L
Linus Torvalds 已提交
2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319

	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));

2320
	sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
L
Linus Torvalds 已提交
2321 2322 2323 2324 2325
	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)
2326
		sel.sport_mask = htons(0xffff);
L
Linus Torvalds 已提交
2327

2328
	sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
L
Linus Torvalds 已提交
2329 2330 2331 2332 2333
	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)
2334
		sel.dport_mask = htons(0xffff);
L
Linus Torvalds 已提交
2335

2336 2337 2338 2339 2340 2341 2342
	sec_ctx = (struct sadb_x_sec_ctx *) ext_hdrs[SADB_X_EXT_SEC_CTX-1];
	if (sec_ctx != NULL) {
		struct xfrm_user_sec_ctx *uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);

		if (!uctx)
			return -ENOMEM;

2343
		err = security_xfrm_policy_alloc(&pol_ctx, uctx);
2344 2345 2346
		kfree(uctx);
		if (err)
			return err;
2347
	}
J
Joy Latten 已提交
2348

A
Alexey Dobriyan 已提交
2349
	xp = xfrm_policy_bysel_ctx(net, XFRM_POLICY_TYPE_MAIN,
2350 2351 2352
				   pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
				   1, &err);
	security_xfrm_policy_free(pol_ctx);
L
Linus Torvalds 已提交
2353 2354 2355
	if (xp == NULL)
		return -ENOENT;

J
Joy Latten 已提交
2356
	xfrm_audit_policy_delete(xp, err ? 0 : 1,
2357 2358
				 audit_get_loginuid(current),
				 audit_get_sessionid(current), 0);
2359 2360

	if (err)
C
Catherine Zhang 已提交
2361
		goto out;
2362

2363 2364
	c.seq = hdr->sadb_msg_seq;
	c.pid = hdr->sadb_msg_pid;
2365
	c.data.byid = 0;
2366
	c.event = XFRM_MSG_DELPOLICY;
2367 2368
	km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);

C
Catherine Zhang 已提交
2369
out:
2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380
	xfrm_pol_put(xp);
	return err;
}

static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb_msg *hdr, int dir)
{
	int err;
	struct sk_buff *out_skb;
	struct sadb_msg *out_hdr;
	err = 0;

L
Linus Torvalds 已提交
2381 2382 2383 2384 2385
	out_skb = pfkey_xfrm_policy2msg_prep(xp);
	if (IS_ERR(out_skb)) {
		err =  PTR_ERR(out_skb);
		goto out;
	}
2386 2387 2388
	err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
	if (err < 0)
		goto out;
L
Linus Torvalds 已提交
2389 2390 2391

	out_hdr = (struct sadb_msg *) out_skb->data;
	out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2392
	out_hdr->sadb_msg_type = hdr->sadb_msg_type;
L
Linus Torvalds 已提交
2393 2394 2395 2396
	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;
A
Alexey Dobriyan 已提交
2397
	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
L
Linus Torvalds 已提交
2398 2399 2400 2401 2402 2403
	err = 0;

out:
	return err;
}

2404 2405 2406
#ifdef CONFIG_NET_KEY_MIGRATE
static int pfkey_sockaddr_pair_size(sa_family_t family)
{
2407
	return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2408 2409
}

2410
static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
2411 2412 2413
			       xfrm_address_t *saddr, xfrm_address_t *daddr,
			       u16 *family)
{
2414 2415
	int af, socklen;

2416
	if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
2417 2418
		return -EINVAL;

2419
	af = pfkey_sockaddr_extract(sa, saddr);
2420 2421 2422 2423
	if (!af)
		return -EINVAL;

	socklen = pfkey_sockaddr_len(af);
2424
	if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
2425
				   daddr) != af)
2426 2427
		return -EINVAL;

2428
	*family = af;
2429 2430 2431 2432 2433 2434 2435 2436
	return 0;
}

static int ipsecrequests_to_migrate(struct sadb_x_ipsecrequest *rq1, int len,
				    struct xfrm_migrate *m)
{
	int err;
	struct sadb_x_ipsecrequest *rq2;
2437
	int mode;
2438 2439 2440 2441 2442 2443

	if (len <= sizeof(struct sadb_x_ipsecrequest) ||
	    len < rq1->sadb_x_ipsecrequest_len)
		return -EINVAL;

	/* old endoints */
2444 2445 2446
	err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
				  rq1->sadb_x_ipsecrequest_len,
				  &m->old_saddr, &m->old_daddr,
2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458
				  &m->old_family);
	if (err)
		return err;

	rq2 = (struct sadb_x_ipsecrequest *)((u8 *)rq1 + rq1->sadb_x_ipsecrequest_len);
	len -= rq1->sadb_x_ipsecrequest_len;

	if (len <= sizeof(struct sadb_x_ipsecrequest) ||
	    len < rq2->sadb_x_ipsecrequest_len)
		return -EINVAL;

	/* new endpoints */
2459 2460 2461
	err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
				  rq2->sadb_x_ipsecrequest_len,
				  &m->new_saddr, &m->new_daddr,
2462 2463 2464 2465 2466 2467 2468 2469 2470 2471
				  &m->new_family);
	if (err)
		return err;

	if (rq1->sadb_x_ipsecrequest_proto != rq2->sadb_x_ipsecrequest_proto ||
	    rq1->sadb_x_ipsecrequest_mode != rq2->sadb_x_ipsecrequest_mode ||
	    rq1->sadb_x_ipsecrequest_reqid != rq2->sadb_x_ipsecrequest_reqid)
		return -EINVAL;

	m->proto = rq1->sadb_x_ipsecrequest_proto;
2472 2473 2474
	if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
		return -EINVAL;
	m->mode = mode;
2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486
	m->reqid = rq1->sadb_x_ipsecrequest_reqid;

	return ((int)(rq1->sadb_x_ipsecrequest_len +
		      rq2->sadb_x_ipsecrequest_len));
}

static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
			 struct sadb_msg *hdr, void **ext_hdrs)
{
	int i, len, ret, err = -EINVAL;
	u8 dir;
	struct sadb_address *sa;
2487
	struct sadb_x_kmaddress *kma;
2488 2489 2490 2491
	struct sadb_x_policy *pol;
	struct sadb_x_ipsecrequest *rq;
	struct xfrm_selector sel;
	struct xfrm_migrate m[XFRM_MAX_DEPTH];
2492
	struct xfrm_kmaddress k;
2493 2494

	if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2495
				     ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2496 2497 2498 2499 2500
	    !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
		err = -EINVAL;
		goto out;
	}

2501
	kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
2502 2503 2504 2505 2506 2507 2508
	pol = ext_hdrs[SADB_X_EXT_POLICY - 1];

	if (pol->sadb_x_policy_dir >= IPSEC_DIR_MAX) {
		err = -EINVAL;
		goto out;
	}

2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520
	if (kma) {
		/* convert sadb_x_kmaddress to xfrm_kmaddress */
		k.reserved = kma->sadb_x_kmaddress_reserved;
		ret = parse_sockaddr_pair((struct sockaddr *)(kma + 1),
					  8*(kma->sadb_x_kmaddress_len) - sizeof(*kma),
					  &k.local, &k.remote, &k.family);
		if (ret < 0) {
			err = ret;
			goto out;
		}
	}

2521 2522 2523 2524 2525 2526 2527 2528 2529 2530
	dir = pol->sadb_x_policy_dir - 1;
	memset(&sel, 0, sizeof(sel));

	/* set source address info of selector */
	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)
A
Al Viro 已提交
2531
		sel.sport_mask = htons(0xffff);
2532 2533 2534 2535 2536 2537 2538 2539

	/* set destination address info of selector */
	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)
A
Al Viro 已提交
2540
		sel.dport_mask = htons(0xffff);
2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564

	rq = (struct sadb_x_ipsecrequest *)(pol + 1);

	/* extract ipsecrequests */
	i = 0;
	len = pol->sadb_x_policy_len * 8 - sizeof(struct sadb_x_policy);

	while (len > 0 && i < XFRM_MAX_DEPTH) {
		ret = ipsecrequests_to_migrate(rq, len, &m[i]);
		if (ret < 0) {
			err = ret;
			goto out;
		} else {
			rq = (struct sadb_x_ipsecrequest *)((u8 *)rq + ret);
			len -= ret;
			i++;
		}
	}

	if (!i || len > 0) {
		err = -EINVAL;
		goto out;
	}

2565 2566
	return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
			    kma ? &k : NULL);
2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579

 out:
	return err;
}
#else
static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
			 struct sadb_msg *hdr, void **ext_hdrs)
{
	return -ENOPROTOOPT;
}
#endif


L
Linus Torvalds 已提交
2580 2581
static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
2582
	struct net *net = sock_net(sk);
2583
	unsigned int dir;
2584
	int err = 0, delete;
L
Linus Torvalds 已提交
2585 2586
	struct sadb_x_policy *pol;
	struct xfrm_policy *xp;
2587
	struct km_event c;
L
Linus Torvalds 已提交
2588 2589 2590 2591

	if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
		return -EINVAL;

2592 2593 2594 2595
	dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
	if (dir >= XFRM_POLICY_MAX)
		return -EINVAL;

2596
	delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
A
Alexey Dobriyan 已提交
2597
	xp = xfrm_policy_byid(net, XFRM_POLICY_TYPE_MAIN, dir,
2598
			      pol->sadb_x_policy_id, delete, &err);
L
Linus Torvalds 已提交
2599 2600 2601
	if (xp == NULL)
		return -ENOENT;

2602
	if (delete) {
J
Joy Latten 已提交
2603
		xfrm_audit_policy_delete(xp, err ? 0 : 1,
2604 2605
				audit_get_loginuid(current),
				audit_get_sessionid(current), 0);
L
Linus Torvalds 已提交
2606

2607 2608 2609 2610
		if (err)
			goto out;
		c.seq = hdr->sadb_msg_seq;
		c.pid = hdr->sadb_msg_pid;
2611
		c.data.byid = 1;
2612
		c.event = XFRM_MSG_DELPOLICY;
2613
		km_policy_notify(xp, dir, &c);
2614
	} else {
2615
		err = key_pol_get_resp(sk, xp, hdr, dir);
L
Linus Torvalds 已提交
2616 2617
	}

2618
out:
L
Linus Torvalds 已提交
2619 2620 2621 2622 2623 2624
	xfrm_pol_put(xp);
	return err;
}

static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
{
2625
	struct pfkey_sock *pfk = ptr;
L
Linus Torvalds 已提交
2626 2627
	struct sk_buff *out_skb;
	struct sadb_msg *out_hdr;
2628
	int err;
L
Linus Torvalds 已提交
2629

2630 2631 2632
	if (!pfkey_can_dump(&pfk->sk))
		return -ENOBUFS;

L
Linus Torvalds 已提交
2633 2634 2635 2636
	out_skb = pfkey_xfrm_policy2msg_prep(xp);
	if (IS_ERR(out_skb))
		return PTR_ERR(out_skb);

2637 2638 2639
	err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
	if (err < 0)
		return err;
L
Linus Torvalds 已提交
2640 2641

	out_hdr = (struct sadb_msg *) out_skb->data;
2642
	out_hdr->sadb_msg_version = pfk->dump.msg_version;
L
Linus Torvalds 已提交
2643 2644 2645
	out_hdr->sadb_msg_type = SADB_X_SPDDUMP;
	out_hdr->sadb_msg_satype = SADB_SATYPE_UNSPEC;
	out_hdr->sadb_msg_errno = 0;
H
Herbert Xu 已提交
2646
	out_hdr->sadb_msg_seq = count + 1;
2647
	out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
H
Herbert Xu 已提交
2648 2649 2650

	if (pfk->dump.skb)
		pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
A
Alexey Dobriyan 已提交
2651
				&pfk->sk, sock_net(&pfk->sk));
H
Herbert Xu 已提交
2652 2653
	pfk->dump.skb = out_skb;

L
Linus Torvalds 已提交
2654 2655 2656
	return 0;
}

2657 2658
static int pfkey_dump_sp(struct pfkey_sock *pfk)
{
A
Alexey Dobriyan 已提交
2659 2660
	struct net *net = sock_net(&pfk->sk);
	return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
2661 2662 2663 2664 2665 2666 2667
}

static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
{
	xfrm_policy_walk_done(&pfk->dump.u.policy);
}

L
Linus Torvalds 已提交
2668 2669
static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
2670
	struct pfkey_sock *pfk = pfkey_sk(sk);
2671

2672 2673
	if (pfk->dump.dump != NULL)
		return -EBUSY;
L
Linus Torvalds 已提交
2674

2675 2676 2677 2678 2679 2680 2681
	pfk->dump.msg_version = hdr->sadb_msg_version;
	pfk->dump.msg_pid = hdr->sadb_msg_pid;
	pfk->dump.dump = pfkey_dump_sp;
	pfk->dump.done = pfkey_dump_sp_done;
	xfrm_policy_walk_init(&pfk->dump.u.policy, XFRM_POLICY_TYPE_MAIN);

	return pfkey_do_dump(pfk);
L
Linus Torvalds 已提交
2682 2683
}

2684
static int key_notify_policy_flush(struct km_event *c)
L
Linus Torvalds 已提交
2685 2686
{
	struct sk_buff *skb_out;
2687
	struct sadb_msg *hdr;
L
Linus Torvalds 已提交
2688

2689
	skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
L
Linus Torvalds 已提交
2690 2691
	if (!skb_out)
		return -ENOBUFS;
2692
	hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
J
Jerome Borsboom 已提交
2693
	hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2694 2695 2696 2697 2698
	hdr->sadb_msg_seq = c->seq;
	hdr->sadb_msg_pid = c->pid;
	hdr->sadb_msg_version = PF_KEY_V2;
	hdr->sadb_msg_errno = (uint8_t) 0;
	hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
A
Alexey Dobriyan 已提交
2699
	pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
2700
	return 0;
L
Linus Torvalds 已提交
2701

2702 2703 2704 2705
}

static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
2706
	struct net *net = sock_net(sk);
2707
	struct km_event c;
J
Joy Latten 已提交
2708
	struct xfrm_audit audit_info;
2709
	int err;
L
Linus Torvalds 已提交
2710

2711
	audit_info.loginuid = audit_get_loginuid(current);
2712
	audit_info.sessionid = audit_get_sessionid(current);
J
Joy Latten 已提交
2713
	audit_info.secid = 0;
A
Alexey Dobriyan 已提交
2714
	err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info);
2715
	if (err)
2716
		return err;
2717
	c.data.type = XFRM_POLICY_TYPE_MAIN;
2718
	c.event = XFRM_MSG_FLUSHPOLICY;
2719 2720
	c.pid = hdr->sadb_msg_pid;
	c.seq = hdr->sadb_msg_seq;
A
Alexey Dobriyan 已提交
2721
	c.net = net;
2722
	km_policy_notify(NULL, 0, &c);
L
Linus Torvalds 已提交
2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751

	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,
2752
	[SADB_X_MIGRATE]	= pfkey_migrate,
L
Linus Torvalds 已提交
2753 2754 2755 2756 2757 2758 2759 2760
};

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,
A
Alexey Dobriyan 已提交
2761
			BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
L
Linus Torvalds 已提交
2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801

	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)
{
2802 2803 2804 2805 2806 2807
	unsigned int id = d->desc.sadb_alg_id;

	if (id >= sizeof(t->aalgos) * 8)
		return 0;

	return (t->aalgos >> id) & 1;
L
Linus Torvalds 已提交
2808 2809 2810 2811
}

static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
{
2812 2813 2814 2815 2816 2817
	unsigned int id = d->desc.sadb_alg_id;

	if (id >= sizeof(t->ealgos) * 8)
		return 0;

	return (t->ealgos >> id) & 1;
L
Linus Torvalds 已提交
2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841
}

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;
2842

L
Linus Torvalds 已提交
2843 2844
		if (!(ealg_tmpl_set(t, ealg) && ealg->available))
			continue;
2845

L
Linus Torvalds 已提交
2846 2847 2848 2849
		for (k = 1; ; k++) {
			struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
			if (!aalg)
				break;
2850

L
Linus Torvalds 已提交
2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904
			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;
2905

L
Linus Torvalds 已提交
2906 2907
		if (!(ealg_tmpl_set(t, ealg) && ealg->available))
			continue;
2908

L
Linus Torvalds 已提交
2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932
		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;
		}
	}
}

2933 2934 2935 2936 2937 2938
static int key_notify_policy_expire(struct xfrm_policy *xp, struct km_event *c)
{
	return 0;
}

static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
L
Linus Torvalds 已提交
2939 2940 2941
{
	struct sk_buff *out_skb;
	struct sadb_msg *out_hdr;
2942 2943 2944
	int hard;
	int hsc;

2945
	hard = c->data.hard;
2946 2947 2948 2949
	if (hard)
		hsc = 2;
	else
		hsc = 1;
L
Linus Torvalds 已提交
2950

2951
	out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
L
Linus Torvalds 已提交
2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963
	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;

A
Alexey Dobriyan 已提交
2964
	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
L
Linus Torvalds 已提交
2965 2966 2967
	return 0;
}

2968 2969
static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
{
A
Alexey Dobriyan 已提交
2970
	struct net *net = x ? xs_net(x) : c->net;
A
Alexey Dobriyan 已提交
2971 2972 2973
	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);

	if (atomic_read(&net_pfkey->socks_nr) == 0)
2974 2975
		return 0;

2976
	switch (c->event) {
2977
	case XFRM_MSG_EXPIRE:
2978
		return key_notify_sa_expire(x, c);
2979 2980 2981
	case XFRM_MSG_DELSA:
	case XFRM_MSG_NEWSA:
	case XFRM_MSG_UPDSA:
2982
		return key_notify_sa(x, c);
2983
	case XFRM_MSG_FLUSHSA:
2984
		return key_notify_sa_flush(c);
J
Jamal Hadi Salim 已提交
2985 2986
	case XFRM_MSG_NEWAE: /* not yet supported */
		break;
2987 2988 2989 2990 2991 2992 2993 2994 2995 2996
	default:
		printk("pfkey: Unknown SA event %d\n", c->event);
		break;
	}

	return 0;
}

static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
{
2997 2998 2999
	if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
		return 0;

3000
	switch (c->event) {
3001
	case XFRM_MSG_POLEXPIRE:
3002
		return key_notify_policy_expire(xp, c);
3003 3004 3005
	case XFRM_MSG_DELPOLICY:
	case XFRM_MSG_NEWPOLICY:
	case XFRM_MSG_UPDPOLICY:
3006
		return key_notify_policy(xp, dir, c);
3007
	case XFRM_MSG_FLUSHPOLICY:
3008 3009
		if (c->data.type != XFRM_POLICY_TYPE_MAIN)
			break;
3010 3011 3012 3013 3014 3015 3016 3017 3018
		return key_notify_policy_flush(c);
	default:
		printk("pfkey: Unknown policy event %d\n", c->event);
		break;
	}

	return 0;
}

L
Linus Torvalds 已提交
3019 3020 3021
static u32 get_acqseq(void)
{
	u32 res;
3022
	static atomic_t acqseq;
L
Linus Torvalds 已提交
3023

3024 3025 3026
	do {
		res = atomic_inc_return(&acqseq);
	} while (!res);
L
Linus Torvalds 已提交
3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037
	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;
	int sockaddr_size;
	int size;
3038 3039 3040
	struct sadb_x_sec_ctx *sec_ctx;
	struct xfrm_sec_ctx *xfrm_ctx;
	int ctx_size = 0;
3041

L
Linus Torvalds 已提交
3042 3043 3044 3045 3046 3047 3048 3049
	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);
3050

L
Linus Torvalds 已提交
3051 3052 3053 3054 3055
	if (x->id.proto == IPPROTO_AH)
		size += count_ah_combs(t);
	else if (x->id.proto == IPPROTO_ESP)
		size += count_esp_combs(t);

3056 3057 3058 3059 3060
	if ((xfrm_ctx = x->security)) {
		ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
		size +=  sizeof(struct sadb_x_sec_ctx) + ctx_size;
	}

L
Linus Torvalds 已提交
3061 3062 3063
	skb =  alloc_skb(size + 16, GFP_ATOMIC);
	if (skb == NULL)
		return -ENOMEM;
3064

L
Linus Torvalds 已提交
3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075
	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 */
3076
	addr = (struct sadb_address*) skb_put(skb,
L
Linus Torvalds 已提交
3077
					      sizeof(struct sadb_address)+sockaddr_size);
3078
	addr->sadb_address_len =
L
Linus Torvalds 已提交
3079 3080 3081 3082 3083
		(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;
3084 3085 3086 3087 3088
	addr->sadb_address_prefixlen =
		pfkey_sockaddr_fill(&x->props.saddr, 0,
				    (struct sockaddr *) (addr + 1),
				    x->props.family);
	if (!addr->sadb_address_prefixlen)
L
Linus Torvalds 已提交
3089
		BUG();
3090

L
Linus Torvalds 已提交
3091
	/* dst address */
3092
	addr = (struct sadb_address*) skb_put(skb,
L
Linus Torvalds 已提交
3093 3094 3095 3096 3097 3098 3099
					      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;
3100 3101 3102 3103 3104
	addr->sadb_address_prefixlen =
		pfkey_sockaddr_fill(&x->id.daddr, 0,
				    (struct sockaddr *) (addr + 1),
				    x->props.family);
	if (!addr->sadb_address_prefixlen)
L
Linus Torvalds 已提交
3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119
		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);

3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133
	/* security context */
	if (xfrm_ctx) {
		sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
				sizeof(struct sadb_x_sec_ctx) + ctx_size);
		sec_ctx->sadb_x_sec_len =
		  (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
		sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
		sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
		sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
		sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
		memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
		       xfrm_ctx->ctx_len);
	}

A
Alexey Dobriyan 已提交
3134
	return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
L
Linus Torvalds 已提交
3135 3136
}

3137
static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3138
						u8 *data, int len, int *dir)
L
Linus Torvalds 已提交
3139
{
A
Alexey Dobriyan 已提交
3140
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
3141 3142
	struct xfrm_policy *xp;
	struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3143
	struct sadb_x_sec_ctx *sec_ctx;
L
Linus Torvalds 已提交
3144

3145
	switch (sk->sk_family) {
L
Linus Torvalds 已提交
3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172
	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;

A
Alexey Dobriyan 已提交
3173
	xp = xfrm_policy_alloc(net, GFP_ATOMIC);
L
Linus Torvalds 已提交
3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185
	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;
3186
	xp->family = sk->sk_family;
L
Linus Torvalds 已提交
3187 3188 3189 3190 3191 3192

	xp->xfrm_nr = 0;
	if (pol->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
	    (*dir = parse_ipsecrequests(xp, pol)) < 0)
		goto out;

3193 3194 3195 3196 3197 3198 3199 3200 3201
	/* security context too */
	if (len >= (pol->sadb_x_policy_len*8 +
	    sizeof(struct sadb_x_sec_ctx))) {
		char *p = (char *)pol;
		struct xfrm_user_sec_ctx *uctx;

		p += pol->sadb_x_policy_len*8;
		sec_ctx = (struct sadb_x_sec_ctx *)p;
		if (len < pol->sadb_x_policy_len*8 +
3202 3203
		    sec_ctx->sadb_x_sec_len) {
			*dir = -EINVAL;
3204
			goto out;
3205
		}
3206 3207 3208
		if ((*dir = verify_sec_ctx_len(p)))
			goto out;
		uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3209
		*dir = security_xfrm_policy_alloc(&xp->security, uctx);
3210 3211 3212 3213 3214 3215
		kfree(uctx);

		if (*dir)
			goto out;
	}

L
Linus Torvalds 已提交
3216 3217 3218 3219
	*dir = pol->sadb_x_policy_dir-1;
	return xp;

out:
3220
	xp->walk.dead = 1;
3221
	xfrm_policy_destroy(xp);
L
Linus Torvalds 已提交
3222 3223 3224
	return NULL;
}

A
Al Viro 已提交
3225
static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
L
Linus Torvalds 已提交
3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253
{
	struct sk_buff *skb;
	struct sadb_msg *hdr;
	struct sadb_sa *sa;
	struct sadb_address *addr;
	struct sadb_x_nat_t_port *n_port;
	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)
	 */
3254

L
Linus Torvalds 已提交
3255 3256 3257 3258 3259
	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);
3260

L
Linus Torvalds 已提交
3261 3262 3263
	skb =  alloc_skb(size + 16, GFP_ATOMIC);
	if (skb == NULL)
		return -ENOMEM;
3264

L
Linus Torvalds 已提交
3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288
	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);
3289
	addr->sadb_address_len =
L
Linus Torvalds 已提交
3290 3291 3292 3293 3294
		(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;
3295 3296 3297 3298 3299
	addr->sadb_address_prefixlen =
		pfkey_sockaddr_fill(&x->props.saddr, 0,
				    (struct sockaddr *) (addr + 1),
				    x->props.family);
	if (!addr->sadb_address_prefixlen)
L
Linus Torvalds 已提交
3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311
		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);
3312
	addr->sadb_address_len =
L
Linus Torvalds 已提交
3313 3314 3315 3316 3317
		(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;
3318 3319 3320 3321 3322
	addr->sadb_address_prefixlen =
		pfkey_sockaddr_fill(ipaddr, 0,
				    (struct sockaddr *) (addr + 1),
				    x->props.family);
	if (!addr->sadb_address_prefixlen)
L
Linus Torvalds 已提交
3323 3324 3325 3326 3327 3328 3329 3330 3331
		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;

A
Alexey Dobriyan 已提交
3332
	return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
L
Linus Torvalds 已提交
3333 3334
}

3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347
#ifdef CONFIG_NET_KEY_MIGRATE
static int set_sadb_address(struct sk_buff *skb, int sasize, int type,
			    struct xfrm_selector *sel)
{
	struct sadb_address *addr;
	addr = (struct sadb_address *)skb_put(skb, sizeof(struct sadb_address) + sasize);
	addr->sadb_address_len = (sizeof(struct sadb_address) + sasize)/8;
	addr->sadb_address_exttype = type;
	addr->sadb_address_proto = sel->proto;
	addr->sadb_address_reserved = 0;

	switch (type) {
	case SADB_EXT_ADDRESS_SRC:
3348 3349 3350 3351
		addr->sadb_address_prefixlen = sel->prefixlen_s;
		pfkey_sockaddr_fill(&sel->saddr, 0,
				    (struct sockaddr *)(addr + 1),
				    sel->family);
3352 3353
		break;
	case SADB_EXT_ADDRESS_DST:
3354 3355 3356 3357
		addr->sadb_address_prefixlen = sel->prefixlen_d;
		pfkey_sockaddr_fill(&sel->daddr, 0,
				    (struct sockaddr *)(addr + 1),
				    sel->family);
3358 3359 3360 3361 3362 3363 3364 3365
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391

static int set_sadb_kmaddress(struct sk_buff *skb, struct xfrm_kmaddress *k)
{
	struct sadb_x_kmaddress *kma;
	u8 *sa;
	int family = k->family;
	int socklen = pfkey_sockaddr_len(family);
	int size_req;

	size_req = (sizeof(struct sadb_x_kmaddress) +
		    pfkey_sockaddr_pair_size(family));

	kma = (struct sadb_x_kmaddress *)skb_put(skb, size_req);
	memset(kma, 0, size_req);
	kma->sadb_x_kmaddress_len = size_req / 8;
	kma->sadb_x_kmaddress_exttype = SADB_X_EXT_KMADDRESS;
	kma->sadb_x_kmaddress_reserved = k->reserved;

	sa = (u8 *)(kma + 1);
	if (!pfkey_sockaddr_fill(&k->local, 0, (struct sockaddr *)sa, family) ||
	    !pfkey_sockaddr_fill(&k->remote, 0, (struct sockaddr *)(sa+socklen), family))
		return -EINVAL;

	return 0;
}

3392 3393 3394 3395 3396 3397
static int set_ipsecrequest(struct sk_buff *skb,
			    uint8_t proto, uint8_t mode, int level,
			    uint32_t reqid, uint8_t family,
			    xfrm_address_t *src, xfrm_address_t *dst)
{
	struct sadb_x_ipsecrequest *rq;
3398 3399
	u8 *sa;
	int socklen = pfkey_sockaddr_len(family);
3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412
	int size_req;

	size_req = sizeof(struct sadb_x_ipsecrequest) +
		   pfkey_sockaddr_pair_size(family);

	rq = (struct sadb_x_ipsecrequest *)skb_put(skb, size_req);
	memset(rq, 0, size_req);
	rq->sadb_x_ipsecrequest_len = size_req;
	rq->sadb_x_ipsecrequest_proto = proto;
	rq->sadb_x_ipsecrequest_mode = mode;
	rq->sadb_x_ipsecrequest_level = level;
	rq->sadb_x_ipsecrequest_reqid = reqid;

3413 3414 3415
	sa = (u8 *) (rq + 1);
	if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
	    !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3416 3417 3418 3419 3420 3421 3422 3423
		return -EINVAL;

	return 0;
}
#endif

#ifdef CONFIG_NET_KEY_MIGRATE
static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3424 3425
			      struct xfrm_migrate *m, int num_bundles,
			      struct xfrm_kmaddress *k)
3426 3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441
{
	int i;
	int sasize_sel;
	int size = 0;
	int size_pol = 0;
	struct sk_buff *skb;
	struct sadb_msg *hdr;
	struct sadb_x_policy *pol;
	struct xfrm_migrate *mp;

	if (type != XFRM_POLICY_TYPE_MAIN)
		return 0;

	if (num_bundles <= 0 || num_bundles > XFRM_MAX_DEPTH)
		return -EINVAL;

3442 3443 3444 3445 3446 3447
	if (k != NULL) {
		/* addresses for KM */
		size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
				     pfkey_sockaddr_pair_size(k->family));
	}

3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483
	/* selector */
	sasize_sel = pfkey_sockaddr_size(sel->family);
	if (!sasize_sel)
		return -EINVAL;
	size += (sizeof(struct sadb_address) + sasize_sel) * 2;

	/* policy info */
	size_pol += sizeof(struct sadb_x_policy);

	/* ipsecrequests */
	for (i = 0, mp = m; i < num_bundles; i++, mp++) {
		/* old locator pair */
		size_pol += sizeof(struct sadb_x_ipsecrequest) +
			    pfkey_sockaddr_pair_size(mp->old_family);
		/* new locator pair */
		size_pol += sizeof(struct sadb_x_ipsecrequest) +
			    pfkey_sockaddr_pair_size(mp->new_family);
	}

	size += sizeof(struct sadb_msg) + size_pol;

	/* alloc buffer */
	skb = alloc_skb(size, 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_MIGRATE;
	hdr->sadb_msg_satype = pfkey_proto2satype(m->proto);
	hdr->sadb_msg_len = size / 8;
	hdr->sadb_msg_errno = 0;
	hdr->sadb_msg_reserved = 0;
	hdr->sadb_msg_seq = 0;
	hdr->sadb_msg_pid = 0;

3484 3485 3486 3487
	/* Addresses to be used by KM for negotiation, if ext is available */
	if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
		return -EINVAL;

3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504
	/* selector src */
	set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_SRC, sel);

	/* selector dst */
	set_sadb_address(skb, sasize_sel, SADB_EXT_ADDRESS_DST, sel);

	/* policy information */
	pol = (struct sadb_x_policy *)skb_put(skb, sizeof(struct sadb_x_policy));
	pol->sadb_x_policy_len = size_pol / 8;
	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 = 0;
	pol->sadb_x_policy_priority = 0;

	for (i = 0, mp = m; i < num_bundles; i++, mp++) {
		/* old ipsecrequest */
3505 3506
		int mode = pfkey_mode_from_xfrm(mp->mode);
		if (mode < 0)
3507
			goto err;
3508
		if (set_ipsecrequest(skb, mp->proto, mode,
3509 3510
				     (mp->reqid ?  IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
				     mp->reqid, mp->old_family,
3511 3512
				     &mp->old_saddr, &mp->old_daddr) < 0)
			goto err;
3513 3514

		/* new ipsecrequest */
3515
		if (set_ipsecrequest(skb, mp->proto, mode,
3516 3517
				     (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
				     mp->reqid, mp->new_family,
3518 3519
				     &mp->new_saddr, &mp->new_daddr) < 0)
			goto err;
3520 3521 3522
	}

	/* broadcast migrate message to sockets */
A
Alexey Dobriyan 已提交
3523
	pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
3524 3525

	return 0;
3526 3527 3528 3529

err:
	kfree_skb(skb);
	return -EINVAL;
3530 3531 3532
}
#else
static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3533 3534
			      struct xfrm_migrate *m, int num_bundles,
			      struct xfrm_kmaddress *k)
3535 3536 3537 3538 3539
{
	return -ENOPROTOOPT;
}
#endif

L
Linus Torvalds 已提交
3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568
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;

A
Arjan van de Ven 已提交
3569
	mutex_lock(&xfrm_cfg_mutex);
L
Linus Torvalds 已提交
3570
	err = pfkey_process(sk, skb, hdr);
A
Arjan van de Ven 已提交
3571
	mutex_unlock(&xfrm_cfg_mutex);
L
Linus Torvalds 已提交
3572 3573 3574 3575

out:
	if (err && hdr && pfkey_error(hdr, err, sk) == 0)
		err = 0;
3576
	kfree_skb(skb);
L
Linus Torvalds 已提交
3577 3578 3579 3580 3581 3582 3583 3584 3585

	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;
3586
	struct pfkey_sock *pfk = pfkey_sk(sk);
L
Linus Torvalds 已提交
3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604
	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;
	}

3605
	skb_reset_transport_header(skb);
L
Linus Torvalds 已提交
3606 3607 3608 3609
	err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
	if (err)
		goto out_free;

3610
	sock_recv_ts_and_drops(msg, sk, skb);
L
Linus Torvalds 已提交
3611 3612 3613

	err = (flags & MSG_TRUNC) ? skb->len : copied;

3614 3615 3616 3617
	if (pfk->dump.dump != NULL &&
	    3 * atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf)
		pfkey_do_dump(pfk);

L
Linus Torvalds 已提交
3618 3619 3620 3621 3622 3623
out_free:
	skb_free_datagram(sk, skb);
out:
	return err;
}

3624
static const struct proto_ops pfkey_ops = {
L
Linus Torvalds 已提交
3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647
	.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,
};

3648
static const struct net_proto_family pfkey_family_ops = {
L
Linus Torvalds 已提交
3649 3650 3651 3652 3653 3654
	.family	=	PF_KEY,
	.create	=	pfkey_create,
	.owner	=	THIS_MODULE,
};

#ifdef CONFIG_PROC_FS
3655
static int pfkey_seq_show(struct seq_file *f, void *v)
L
Linus Torvalds 已提交
3656
{
3657
	struct sock *s = sk_entry(v);
L
Linus Torvalds 已提交
3658

3659 3660 3661 3662
	if (v == SEQ_START_TOKEN)
		seq_printf(f ,"sk       RefCnt Rmem   Wmem   User   Inode\n");
	else
		seq_printf(f ,"%p %-6d %-6u %-6u %-6u %-6lu\n",
L
Linus Torvalds 已提交
3663 3664
			       s,
			       atomic_read(&s->sk_refcnt),
3665 3666
			       sk_rmem_alloc_get(s),
			       sk_wmem_alloc_get(s),
L
Linus Torvalds 已提交
3667 3668 3669
			       sock_i_uid(s),
			       sock_i_ino(s)
			       );
3670 3671 3672 3673 3674
	return 0;
}

static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
{
3675
	struct net *net = seq_file_net(f);
A
Alexey Dobriyan 已提交
3676
	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
L
Linus Torvalds 已提交
3677

3678
	read_lock(&pfkey_table_lock);
3679
	return seq_hlist_start_head(&net_pfkey->table, *ppos);
3680 3681 3682 3683
}

static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
{
3684
	struct net *net = seq_file_net(f);
A
Alexey Dobriyan 已提交
3685 3686
	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);

3687
	return seq_hlist_next(v, &net_pfkey->table, ppos);
3688
}
L
Linus Torvalds 已提交
3689

3690 3691 3692 3693
static void pfkey_seq_stop(struct seq_file *f, void *v)
{
	read_unlock(&pfkey_table_lock);
}
L
Linus Torvalds 已提交
3694

3695
static const struct seq_operations pfkey_seq_ops = {
3696 3697 3698 3699 3700
	.start	= pfkey_seq_start,
	.next	= pfkey_seq_next,
	.stop	= pfkey_seq_stop,
	.show	= pfkey_seq_show,
};
L
Linus Torvalds 已提交
3701

3702 3703
static int pfkey_seq_open(struct inode *inode, struct file *file)
{
3704 3705
	return seq_open_net(inode, file, &pfkey_seq_ops,
			    sizeof(struct seq_net_private));
L
Linus Torvalds 已提交
3706
}
3707

3708
static const struct file_operations pfkey_proc_ops = {
3709 3710 3711
	.open	 = pfkey_seq_open,
	.read	 = seq_read,
	.llseek	 = seq_lseek,
3712
	.release = seq_release_net,
3713 3714
};

3715
static int __net_init pfkey_init_proc(struct net *net)
3716
{
3717 3718
	struct proc_dir_entry *e;

3719
	e = proc_net_fops_create(net, "pfkey", 0, &pfkey_proc_ops);
3720
	if (e == NULL)
3721
		return -ENOMEM;
3722 3723

	return 0;
3724 3725
}

3726
static void __net_exit pfkey_exit_proc(struct net *net)
3727
{
3728
	proc_net_remove(net, "pfkey");
3729 3730
}
#else
3731
static inline int pfkey_init_proc(struct net *net)
3732 3733 3734 3735
{
	return 0;
}

3736
static inline void pfkey_exit_proc(struct net *net)
3737 3738
{
}
L
Linus Torvalds 已提交
3739 3740 3741 3742 3743 3744 3745 3746 3747
#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,
3748
	.notify_policy	= pfkey_send_policy_notify,
3749
	.migrate	= pfkey_send_migrate,
L
Linus Torvalds 已提交
3750 3751
};

A
Alexey Dobriyan 已提交
3752 3753
static int __net_init pfkey_net_init(struct net *net)
{
3754
	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
A
Alexey Dobriyan 已提交
3755 3756 3757 3758
	int rv;

	INIT_HLIST_HEAD(&net_pfkey->table);
	atomic_set(&net_pfkey->socks_nr, 0);
3759

3760
	rv = pfkey_init_proc(net);
A
Alexey Dobriyan 已提交
3761 3762 3763 3764 3765 3766 3767 3768

	return rv;
}

static void __net_exit pfkey_net_exit(struct net *net)
{
	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);

3769
	pfkey_exit_proc(net);
A
Alexey Dobriyan 已提交
3770 3771 3772 3773 3774 3775
	BUG_ON(!hlist_empty(&net_pfkey->table));
}

static struct pernet_operations pfkey_net_ops = {
	.init = pfkey_net_init,
	.exit = pfkey_net_exit,
3776 3777
	.id   = &pfkey_net_id,
	.size = sizeof(struct netns_pfkey),
A
Alexey Dobriyan 已提交
3778 3779
};

L
Linus Torvalds 已提交
3780 3781 3782 3783
static void __exit ipsec_pfkey_exit(void)
{
	xfrm_unregister_km(&pfkeyv2_mgr);
	sock_unregister(PF_KEY);
3784
	unregister_pernet_subsys(&pfkey_net_ops);
L
Linus Torvalds 已提交
3785 3786 3787 3788 3789 3790 3791 3792 3793 3794
	proto_unregister(&key_proto);
}

static int __init ipsec_pfkey_init(void)
{
	int err = proto_register(&key_proto, 0);

	if (err != 0)
		goto out;

3795
	err = register_pernet_subsys(&pfkey_net_ops);
L
Linus Torvalds 已提交
3796 3797
	if (err != 0)
		goto out_unregister_key_proto;
3798 3799 3800
	err = sock_register(&pfkey_family_ops);
	if (err != 0)
		goto out_unregister_pernet;
L
Linus Torvalds 已提交
3801 3802
	err = xfrm_register_km(&pfkeyv2_mgr);
	if (err != 0)
3803
		goto out_sock_unregister;
L
Linus Torvalds 已提交
3804 3805
out:
	return err;
3806

L
Linus Torvalds 已提交
3807 3808
out_sock_unregister:
	sock_unregister(PF_KEY);
3809 3810
out_unregister_pernet:
	unregister_pernet_subsys(&pfkey_net_ops);
L
Linus Torvalds 已提交
3811 3812 3813 3814 3815 3816 3817 3818 3819
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);