af_key.c 99.3 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 <linux/slab.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 DEFINE_MUTEX(pfkey_mutex);
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#define DUMMY_MARK 0
static struct xfrm_mark dummy_mark = {0, 0};
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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)) {
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		pr_err("Attempt to release alive pfkey socket: %p\n", sk);
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		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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}

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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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	mutex_lock(&pfkey_mutex);
	sk_add_node_rcu(sk, &net_pfkey->table);
	mutex_unlock(&pfkey_mutex);
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}

static void pfkey_remove(struct sock *sk)
{
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	mutex_lock(&pfkey_mutex);
	sk_del_node_init_rcu(sk);
	mutex_unlock(&pfkey_mutex);
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}

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);
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	synchronize_rcu();
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	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;

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	rcu_read_lock();
	sk_for_each_rcu(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;
	}
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	rcu_read_unlock();
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	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, DUMMY_MARK, 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);
	}

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	return skb;
}

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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
1028 1029
static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
						struct sadb_msg *hdr,
L
Linus Torvalds 已提交
1030 1031
						void **ext_hdrs)
{
1032
	struct xfrm_state *x;
L
Linus Torvalds 已提交
1033 1034 1035
	struct sadb_lifetime *lifetime;
	struct sadb_sa *sa;
	struct sadb_key *key;
1036
	struct sadb_x_sec_ctx *sec_ctx;
L
Linus Torvalds 已提交
1037 1038
	uint16_t proto;
	int err;
1039

L
Linus Torvalds 已提交
1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071

	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.

1072
	   However, KAME setkey always uses SADB_SASTATE_LARVAL.
L
Linus Torvalds 已提交
1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092
	   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
1093
	x = xfrm_state_alloc(net);
L
Linus Torvalds 已提交
1094 1095 1096 1097 1098 1099 1100 1101 1102 1103
	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;
1104 1105
	if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
		x->props.flags |= XFRM_STATE_NOPMTUDISC;
L
Linus Torvalds 已提交
1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120

	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;
	}
1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135

	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
1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154
	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);
		}
1155
		x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
L
Linus Torvalds 已提交
1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194
		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; */

1195
	x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
L
Linus Torvalds 已提交
1196 1197 1198 1199 1200
						    &x->props.saddr);
	if (!x->props.family) {
		err = -EAFNOSUPPORT;
		goto out;
	}
1201
	pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
L
Linus Torvalds 已提交
1202 1203 1204 1205
				  &x->id.daddr);

	if (ext_hdrs[SADB_X_EXT_SA2-1]) {
		struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1206 1207 1208 1209 1210 1211
		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
1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222
		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;
	}

1223
	if (!x->sel.family)
1224 1225
		x->sel.family = x->props.family;

L
Linus Torvalds 已提交
1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247
	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
1248
		memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
L
Linus Torvalds 已提交
1249 1250
	}

H
Herbert Xu 已提交
1251 1252
	err = xfrm_init_state(x);
	if (err)
L
Linus Torvalds 已提交
1253
		goto out;
H
Herbert Xu 已提交
1254

L
Linus Torvalds 已提交
1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270
	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
1271
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
1272 1273 1274 1275
	struct sk_buff *resp_skb;
	struct sadb_x_sa2 *sa2;
	struct sadb_address *saddr, *daddr;
	struct sadb_msg *out_hdr;
1276
	struct sadb_spirange *range;
L
Linus Torvalds 已提交
1277
	struct xfrm_state *x = NULL;
1278
	int mode;
1279 1280
	int err;
	u32 min_spi, max_spi;
L
Linus Torvalds 已提交
1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294
	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) {
1295 1296 1297
		mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
		if (mode < 0)
			return -EINVAL;
L
Linus Torvalds 已提交
1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321
		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) {
1322
		x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
L
Linus Torvalds 已提交
1323 1324 1325 1326 1327 1328 1329
		if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
			xfrm_state_put(x);
			x = NULL;
		}
	}

	if (!x)
1330
		x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family);
L
Linus Torvalds 已提交
1331 1332 1333 1334

	if (x == NULL)
		return -ENOENT;

1335 1336
	min_spi = 0x100;
	max_spi = 0x0fffffff;
L
Linus Torvalds 已提交
1337

1338 1339 1340 1341
	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
1342
	}
1343 1344

	err = xfrm_alloc_spi(x, min_spi, max_spi);
1345
	resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
L
Linus Torvalds 已提交
1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362

	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
1363
	pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
L
Linus Torvalds 已提交
1364 1365 1366 1367 1368 1369

	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
1370
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
1371 1372 1373 1374 1375 1376 1377 1378
	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;

1379
	x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
L
Linus Torvalds 已提交
1380 1381 1382 1383 1384 1385
	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
1386
		wake_up(&net->xfrm.km_waitq);
L
Linus Torvalds 已提交
1387 1388 1389 1390 1391 1392
	}
	spin_unlock_bh(&x->lock);
	xfrm_state_put(x);
	return 0;
}

1393 1394 1395
static inline int event2poltype(int event)
{
	switch (event) {
1396
	case XFRM_MSG_DELPOLICY:
1397
		return SADB_X_SPDDELETE;
1398
	case XFRM_MSG_NEWPOLICY:
1399
		return SADB_X_SPDADD;
1400
	case XFRM_MSG_UPDPOLICY:
1401
		return SADB_X_SPDUPDATE;
1402
	case XFRM_MSG_POLEXPIRE:
1403 1404
	//	return SADB_X_SPDEXPIRE;
	default:
1405
		pr_err("pfkey: Unknown policy event %d\n", event);
1406 1407 1408 1409 1410 1411 1412 1413 1414
		break;
	}

	return 0;
}

static inline int event2keytype(int event)
{
	switch (event) {
1415
	case XFRM_MSG_DELSA:
1416
		return SADB_DELETE;
1417
	case XFRM_MSG_NEWSA:
1418
		return SADB_ADD;
1419
	case XFRM_MSG_UPDSA:
1420
		return SADB_UPDATE;
1421
	case XFRM_MSG_EXPIRE:
1422 1423
		return SADB_EXPIRE;
	default:
1424
		pr_err("pfkey: Unknown SA event %d\n", event);
1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436
		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;

1437
	skb = pfkey_xfrm_state2msg(x);
1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450

	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
1451
	pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
1452 1453 1454

	return 0;
}
L
Linus Torvalds 已提交
1455 1456 1457

static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
1458
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
1459 1460
	struct xfrm_state *x;
	int err;
1461
	struct km_event c;
L
Linus Torvalds 已提交
1462

A
Alexey Dobriyan 已提交
1463
	x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
L
Linus Torvalds 已提交
1464 1465 1466
	if (IS_ERR(x))
		return PTR_ERR(x);

1467
	xfrm_state_hold(x);
L
Linus Torvalds 已提交
1468 1469 1470 1471 1472
	if (hdr->sadb_msg_type == SADB_ADD)
		err = xfrm_state_add(x);
	else
		err = xfrm_state_update(x);

J
Joy Latten 已提交
1473
	xfrm_audit_state_add(x, err ? 0 : 1,
1474 1475
			     audit_get_loginuid(current),
			     audit_get_sessionid(current), 0);
J
Joy Latten 已提交
1476

L
Linus Torvalds 已提交
1477 1478
	if (err < 0) {
		x->km.state = XFRM_STATE_DEAD;
1479
		__xfrm_state_put(x);
1480
		goto out;
L
Linus Torvalds 已提交
1481 1482
	}

1483
	if (hdr->sadb_msg_type == SADB_ADD)
1484
		c.event = XFRM_MSG_NEWSA;
1485
	else
1486
		c.event = XFRM_MSG_UPDSA;
1487 1488 1489
	c.seq = hdr->sadb_msg_seq;
	c.pid = hdr->sadb_msg_pid;
	km_state_notify(x, &c);
1490
out:
1491 1492
	xfrm_state_put(x);
	return err;
L
Linus Torvalds 已提交
1493 1494 1495 1496
}

static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
1497
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
1498
	struct xfrm_state *x;
1499 1500
	struct km_event c;
	int err;
L
Linus Torvalds 已提交
1501 1502 1503 1504 1505 1506

	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
1507
	x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
L
Linus Torvalds 已提交
1508 1509 1510
	if (x == NULL)
		return -ESRCH;

C
Catherine Zhang 已提交
1511 1512 1513
	if ((err = security_xfrm_state_delete(x)))
		goto out;

L
Linus Torvalds 已提交
1514
	if (xfrm_state_kern(x)) {
C
Catherine Zhang 已提交
1515 1516
		err = -EPERM;
		goto out;
L
Linus Torvalds 已提交
1517
	}
J
Joy Latten 已提交
1518

1519
	err = xfrm_state_delete(x);
J
Joy Latten 已提交
1520

C
Catherine Zhang 已提交
1521 1522
	if (err < 0)
		goto out;
L
Linus Torvalds 已提交
1523

1524 1525
	c.seq = hdr->sadb_msg_seq;
	c.pid = hdr->sadb_msg_pid;
1526
	c.event = XFRM_MSG_DELSA;
1527
	km_state_notify(x, &c);
C
Catherine Zhang 已提交
1528
out:
J
Joy Latten 已提交
1529
	xfrm_audit_state_delete(x, err ? 0 : 1,
1530 1531
				audit_get_loginuid(current),
				audit_get_sessionid(current), 0);
1532
	xfrm_state_put(x);
L
Linus Torvalds 已提交
1533

1534
	return err;
L
Linus Torvalds 已提交
1535 1536 1537 1538
}

static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
1539
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
1540 1541 1542 1543 1544 1545 1546 1547 1548 1549
	__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
1550
	x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
L
Linus Torvalds 已提交
1551 1552 1553
	if (x == NULL)
		return -ESRCH;

1554
	out_skb = pfkey_xfrm_state2msg(x);
L
Linus Torvalds 已提交
1555 1556 1557 1558 1559 1560 1561
	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;
1562
	out_hdr->sadb_msg_type = SADB_GET;
L
Linus Torvalds 已提交
1563 1564 1565 1566 1567
	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
1568
	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
L
Linus Torvalds 已提交
1569 1570 1571 1572

	return 0;
}

1573
static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
A
Al Viro 已提交
1574
					      gfp_t allocation)
L
Linus Torvalds 已提交
1575 1576 1577 1578 1579 1580 1581 1582 1583 1584
{
	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);
	}
1585

L
Linus Torvalds 已提交
1586 1587 1588 1589 1590
	enc_len = xfrm_count_enc_supported();
	if (enc_len) {
		enc_len *= sizeof(struct sadb_alg);
		enc_len += sizeof(struct sadb_supported);
	}
1591

L
Linus Torvalds 已提交
1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 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
	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();
1660

L
Linus Torvalds 已提交
1661 1662 1663 1664 1665 1666 1667 1668
	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
1669
	pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, sock_net(sk));
L
Linus Torvalds 已提交
1670 1671 1672 1673

	return 0;
}

1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690
static int unicast_flush_resp(struct sock *sk, struct sadb_msg *ihdr)
{
	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));
	memcpy(hdr, ihdr, sizeof(struct sadb_msg));
	hdr->sadb_msg_errno = (uint8_t) 0;
	hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));

	return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
}

1691 1692 1693 1694 1695 1696 1697 1698 1699
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));
1700
	hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
J
Jerome Borsboom 已提交
1701
	hdr->sadb_msg_type = SADB_FLUSH;
1702 1703 1704 1705 1706 1707
	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
1708
	pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
1709 1710 1711 1712

	return 0;
}

L
Linus Torvalds 已提交
1713 1714
static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
1715
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
1716
	unsigned proto;
1717
	struct km_event c;
J
Joy Latten 已提交
1718
	struct xfrm_audit audit_info;
1719
	int err, err2;
L
Linus Torvalds 已提交
1720 1721 1722 1723 1724

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

1725
	audit_info.loginuid = audit_get_loginuid(current);
1726
	audit_info.sessionid = audit_get_sessionid(current);
J
Joy Latten 已提交
1727
	audit_info.secid = 0;
A
Alexey Dobriyan 已提交
1728
	err = xfrm_state_flush(net, proto, &audit_info);
1729
	err2 = unicast_flush_resp(sk, hdr);
1730 1731 1732
	if (err || err2) {
		if (err == -ESRCH) /* empty table - go quietly */
			err = 0;
1733
		return err ? err : err2;
1734
	}
1735

1736
	c.data.proto = proto;
1737 1738
	c.seq = hdr->sadb_msg_seq;
	c.pid = hdr->sadb_msg_pid;
1739
	c.event = XFRM_MSG_FLUSHSA;
A
Alexey Dobriyan 已提交
1740
	c.net = net;
1741
	km_state_notify(NULL, &c);
L
Linus Torvalds 已提交
1742 1743 1744 1745 1746 1747

	return 0;
}

static int dump_sa(struct xfrm_state *x, int count, void *ptr)
{
1748
	struct pfkey_sock *pfk = ptr;
L
Linus Torvalds 已提交
1749 1750 1751
	struct sk_buff *out_skb;
	struct sadb_msg *out_hdr;

1752 1753 1754
	if (!pfkey_can_dump(&pfk->sk))
		return -ENOBUFS;

1755
	out_skb = pfkey_xfrm_state2msg(x);
L
Linus Torvalds 已提交
1756 1757 1758 1759
	if (IS_ERR(out_skb))
		return PTR_ERR(out_skb);

	out_hdr = (struct sadb_msg *) out_skb->data;
1760
	out_hdr->sadb_msg_version = pfk->dump.msg_version;
L
Linus Torvalds 已提交
1761 1762 1763 1764
	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
1765
	out_hdr->sadb_msg_seq = count + 1;
1766
	out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
H
Herbert Xu 已提交
1767 1768 1769

	if (pfk->dump.skb)
		pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
A
Alexey Dobriyan 已提交
1770
				&pfk->sk, sock_net(&pfk->sk));
H
Herbert Xu 已提交
1771 1772
	pfk->dump.skb = out_skb;

L
Linus Torvalds 已提交
1773 1774 1775
	return 0;
}

1776 1777
static int pfkey_dump_sa(struct pfkey_sock *pfk)
{
A
Alexey Dobriyan 已提交
1778 1779
	struct net *net = sock_net(&pfk->sk);
	return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
1780 1781 1782 1783 1784 1785 1786
}

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

L
Linus Torvalds 已提交
1787 1788 1789
static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
	u8 proto;
1790 1791 1792 1793
	struct pfkey_sock *pfk = pfkey_sk(sk);

	if (pfk->dump.dump != NULL)
		return -EBUSY;
L
Linus Torvalds 已提交
1794 1795 1796 1797 1798

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

1799 1800 1801 1802 1803
	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);
1804

1805
	return pfkey_do_dump(pfk);
L
Linus Torvalds 已提交
1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819
}

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
1820
	pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
L
Linus Torvalds 已提交
1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835
	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
1836
static u32 gen_reqid(struct net *net)
L
Linus Torvalds 已提交
1837
{
1838
	struct xfrm_policy_walk walk;
L
Linus Torvalds 已提交
1839
	u32 start;
1840
	int rc;
L
Linus Torvalds 已提交
1841 1842 1843 1844 1845 1846 1847
	static u32 reqid = IPSEC_MANUAL_REQID_MAX;

	start = reqid;
	do {
		++reqid;
		if (reqid == 0)
			reqid = IPSEC_MANUAL_REQID_MAX+1;
1848
		xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
A
Alexey Dobriyan 已提交
1849
		rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
1850 1851
		xfrm_policy_walk_done(&walk);
		if (rc != -EEXIST)
L
Linus Torvalds 已提交
1852 1853 1854 1855 1856 1857 1858 1859
			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
1860
	struct net *net = xp_net(xp);
L
Linus Torvalds 已提交
1861
	struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1862
	int mode;
L
Linus Torvalds 已提交
1863 1864 1865 1866 1867 1868 1869 1870

	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 */
1871 1872 1873
	if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
		return -EINVAL;
	t->mode = mode;
L
Linus Torvalds 已提交
1874 1875 1876 1877 1878 1879
	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
1880
		if (!t->reqid && !(t->reqid = gen_reqid(net)))
L
Linus Torvalds 已提交
1881 1882 1883 1884
			return -ENOBUFS;
	}

	/* addresses present only in tunnel mode */
1885
	if (t->mode == XFRM_MODE_TUNNEL) {
1886 1887 1888 1889 1890 1891
		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
1892
			return -EINVAL;
1893 1894 1895 1896 1897 1898

		socklen = pfkey_sockaddr_len(family);
		if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen),
					   &t->id.daddr) != family)
			return -EINVAL;
		t->encap_family = family;
1899 1900 1901
	} else
		t->encap_family = xp->family;

L
Linus Torvalds 已提交
1902
	/* No way to set this via kame pfkey */
1903
	t->allalgs = 1;
L
Linus Torvalds 已提交
1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923
	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;
}

1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935
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
1936 1937
static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
{
1938
	struct xfrm_tmpl *t;
L
Linus Torvalds 已提交
1939
	int sockaddr_size = pfkey_sockaddr_size(xp->family);
1940 1941 1942 1943 1944
	int socklen = 0;
	int i;

	for (i=0; i<xp->xfrm_nr; i++) {
		t = xp->xfrm_vec + i;
1945
		socklen += pfkey_sockaddr_len(t->encap_family);
1946
	}
L
Linus Torvalds 已提交
1947 1948 1949

	return sizeof(struct sadb_msg) +
		(sizeof(struct sadb_lifetime) * 3) +
1950
		(sizeof(struct sadb_address) * 2) +
L
Linus Torvalds 已提交
1951 1952
		(sockaddr_size * 2) +
		sizeof(struct sadb_x_policy) +
1953 1954
		(xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
		(socklen * 2) +
1955
		pfkey_xfrm_policy2sec_ctx_size(xp);
L
Linus Torvalds 已提交
1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971
}

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;
}

1972
static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
L
Linus Torvalds 已提交
1973 1974 1975 1976 1977
{
	struct sadb_msg *hdr;
	struct sadb_address *addr;
	struct sadb_lifetime *lifetime;
	struct sadb_x_policy *pol;
1978 1979
	struct sadb_x_sec_ctx *sec_ctx;
	struct xfrm_sec_ctx *xfrm_ctx;
L
Linus Torvalds 已提交
1980 1981 1982
	int i;
	int size;
	int sockaddr_size = pfkey_sockaddr_size(xp->family);
1983
	int socklen = pfkey_sockaddr_len(xp->family);
L
Linus Torvalds 已提交
1984 1985 1986 1987 1988 1989 1990 1991

	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 */
1992
	addr = (struct sadb_address*) skb_put(skb,
L
Linus Torvalds 已提交
1993
					      sizeof(struct sadb_address)+sockaddr_size);
1994
	addr->sadb_address_len =
L
Linus Torvalds 已提交
1995 1996 1997 1998 1999 2000
		(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;
2001 2002 2003 2004
	if (!pfkey_sockaddr_fill(&xp->selector.saddr,
				 xp->selector.sport,
				 (struct sockaddr *) (addr + 1),
				 xp->family))
L
Linus Torvalds 已提交
2005 2006 2007
		BUG();

	/* dst address */
2008
	addr = (struct sadb_address*) skb_put(skb,
L
Linus Torvalds 已提交
2009 2010 2011 2012 2013 2014
					      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);
2015
	addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
L
Linus Torvalds 已提交
2016
	addr->sadb_address_reserved = 0;
2017 2018 2019 2020

	pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
			    (struct sockaddr *) (addr + 1),
			    xp->family);
L
Linus Torvalds 已提交
2021 2022

	/* hard time */
2023
	lifetime = (struct sadb_lifetime *)  skb_put(skb,
L
Linus Torvalds 已提交
2024 2025 2026 2027 2028 2029 2030 2031 2032
						     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 */
2033
	lifetime = (struct sadb_lifetime *)  skb_put(skb,
L
Linus Torvalds 已提交
2034 2035 2036 2037 2038 2039 2040 2041 2042
						     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 */
2043
	lifetime = (struct sadb_lifetime *)  skb_put(skb,
L
Linus Torvalds 已提交
2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070
						     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;
2071
		int mode;
L
Linus Torvalds 已提交
2072 2073

		req_size = sizeof(struct sadb_x_ipsecrequest);
2074 2075 2076 2077
		if (t->mode == XFRM_MODE_TUNNEL) {
			socklen = pfkey_sockaddr_len(t->encap_family);
			req_size += socklen * 2;
		} else {
L
Linus Torvalds 已提交
2078
			size -= 2*socklen;
2079
		}
L
Linus Torvalds 已提交
2080 2081 2082 2083 2084
		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;
2085 2086
		if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
			return -EINVAL;
2087
		rq->sadb_x_ipsecrequest_mode = mode;
L
Linus Torvalds 已提交
2088 2089 2090 2091 2092 2093
		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;
2094

2095
		if (t->mode == XFRM_MODE_TUNNEL) {
2096 2097 2098 2099 2100 2101 2102
			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
2103 2104
		}
	}
2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119

	/* 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
2120 2121
	hdr->sadb_msg_len = size / sizeof(uint64_t);
	hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2122 2123

	return 0;
L
Linus Torvalds 已提交
2124 2125
}

2126 2127 2128 2129 2130 2131 2132
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);
2133 2134 2135
	if (IS_ERR(out_skb))
		return PTR_ERR(out_skb);

2136 2137 2138
	err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
	if (err < 0)
		return err;
2139 2140 2141 2142

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

2143
	if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
2144 2145 2146 2147 2148 2149
		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
2150
	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
2151 2152 2153 2154
	return 0;

}

L
Linus Torvalds 已提交
2155 2156
static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
2157
	struct net *net = sock_net(sk);
2158
	int err = 0;
L
Linus Torvalds 已提交
2159 2160 2161 2162
	struct sadb_lifetime *lifetime;
	struct sadb_address *sa;
	struct sadb_x_policy *pol;
	struct xfrm_policy *xp;
2163
	struct km_event c;
2164
	struct sadb_x_sec_ctx *sec_ctx;
L
Linus Torvalds 已提交
2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176

	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
2177
	xp = xfrm_policy_alloc(net, GFP_KERNEL);
L
Linus Torvalds 已提交
2178 2179 2180 2181 2182 2183 2184
	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;

2185
	sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
L
Linus Torvalds 已提交
2186 2187 2188 2189 2190 2191 2192 2193 2194 2195
	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)
2196
		xp->selector.sport_mask = htons(0xffff);
L
Linus Torvalds 已提交
2197

2198
	sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
L
Linus Torvalds 已提交
2199 2200 2201 2202 2203 2204 2205 2206 2207 2208
	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)
2209
		xp->selector.dport_mask = htons(0xffff);
L
Linus Torvalds 已提交
2210

2211 2212 2213 2214 2215 2216 2217 2218 2219
	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;
		}

2220
		err = security_xfrm_policy_alloc(&xp->security, uctx);
2221 2222 2223 2224 2225 2226
		kfree(uctx);

		if (err)
			goto out;
	}

L
Linus Torvalds 已提交
2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249
	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);
2250

J
Joy Latten 已提交
2251
	xfrm_audit_policy_add(xp, err ? 0 : 1,
2252 2253
			      audit_get_loginuid(current),
			      audit_get_sessionid(current), 0);
J
Joy Latten 已提交
2254

2255 2256
	if (err)
		goto out;
L
Linus Torvalds 已提交
2257

2258
	if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2259
		c.event = XFRM_MSG_UPDPOLICY;
2260
	else
2261
		c.event = XFRM_MSG_NEWPOLICY;
L
Linus Torvalds 已提交
2262

2263 2264
	c.seq = hdr->sadb_msg_seq;
	c.pid = hdr->sadb_msg_pid;
L
Linus Torvalds 已提交
2265

2266 2267
	km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
	xfrm_pol_put(xp);
L
Linus Torvalds 已提交
2268 2269 2270
	return 0;

out:
H
Herbert Xu 已提交
2271
	xp->walk.dead = 1;
2272
	xfrm_policy_destroy(xp);
L
Linus Torvalds 已提交
2273 2274 2275 2276 2277
	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
2278
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
2279 2280 2281
	int err;
	struct sadb_address *sa;
	struct sadb_x_policy *pol;
2282
	struct xfrm_policy *xp;
L
Linus Torvalds 已提交
2283
	struct xfrm_selector sel;
2284
	struct km_event c;
2285
	struct sadb_x_sec_ctx *sec_ctx;
2286
	struct xfrm_sec_ctx *pol_ctx = NULL;
L
Linus Torvalds 已提交
2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298

	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));

2299
	sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
L
Linus Torvalds 已提交
2300 2301 2302 2303 2304
	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)
2305
		sel.sport_mask = htons(0xffff);
L
Linus Torvalds 已提交
2306

2307
	sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
L
Linus Torvalds 已提交
2308 2309 2310 2311 2312
	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)
2313
		sel.dport_mask = htons(0xffff);
L
Linus Torvalds 已提交
2314

2315 2316 2317 2318 2319 2320 2321
	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;

2322
		err = security_xfrm_policy_alloc(&pol_ctx, uctx);
2323 2324 2325
		kfree(uctx);
		if (err)
			return err;
2326
	}
J
Joy Latten 已提交
2327

2328
	xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2329 2330 2331
				   pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
				   1, &err);
	security_xfrm_policy_free(pol_ctx);
L
Linus Torvalds 已提交
2332 2333 2334
	if (xp == NULL)
		return -ENOENT;

J
Joy Latten 已提交
2335
	xfrm_audit_policy_delete(xp, err ? 0 : 1,
2336 2337
				 audit_get_loginuid(current),
				 audit_get_sessionid(current), 0);
2338 2339

	if (err)
C
Catherine Zhang 已提交
2340
		goto out;
2341

2342 2343
	c.seq = hdr->sadb_msg_seq;
	c.pid = hdr->sadb_msg_pid;
2344
	c.data.byid = 0;
2345
	c.event = XFRM_MSG_DELPOLICY;
2346 2347
	km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);

C
Catherine Zhang 已提交
2348
out:
2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359
	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
2360 2361 2362 2363 2364
	out_skb = pfkey_xfrm_policy2msg_prep(xp);
	if (IS_ERR(out_skb)) {
		err =  PTR_ERR(out_skb);
		goto out;
	}
2365 2366 2367
	err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
	if (err < 0)
		goto out;
L
Linus Torvalds 已提交
2368 2369 2370

	out_hdr = (struct sadb_msg *) out_skb->data;
	out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2371
	out_hdr->sadb_msg_type = hdr->sadb_msg_type;
L
Linus Torvalds 已提交
2372 2373 2374 2375
	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
2376
	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
L
Linus Torvalds 已提交
2377 2378 2379 2380 2381 2382
	err = 0;

out:
	return err;
}

2383 2384 2385
#ifdef CONFIG_NET_KEY_MIGRATE
static int pfkey_sockaddr_pair_size(sa_family_t family)
{
2386
	return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2387 2388
}

2389
static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
2390 2391 2392
			       xfrm_address_t *saddr, xfrm_address_t *daddr,
			       u16 *family)
{
2393 2394
	int af, socklen;

2395
	if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
2396 2397
		return -EINVAL;

2398
	af = pfkey_sockaddr_extract(sa, saddr);
2399 2400 2401 2402
	if (!af)
		return -EINVAL;

	socklen = pfkey_sockaddr_len(af);
2403
	if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
2404
				   daddr) != af)
2405 2406
		return -EINVAL;

2407
	*family = af;
2408 2409 2410 2411 2412 2413 2414 2415
	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;
2416
	int mode;
2417 2418 2419 2420 2421 2422

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

	/* old endoints */
2423 2424 2425
	err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
				  rq1->sadb_x_ipsecrequest_len,
				  &m->old_saddr, &m->old_daddr,
2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437
				  &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 */
2438 2439 2440
	err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
				  rq2->sadb_x_ipsecrequest_len,
				  &m->new_saddr, &m->new_daddr,
2441 2442 2443 2444 2445 2446 2447 2448 2449 2450
				  &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;
2451 2452 2453
	if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
		return -EINVAL;
	m->mode = mode;
2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465
	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;
2466
	struct sadb_x_kmaddress *kma;
2467 2468 2469 2470
	struct sadb_x_policy *pol;
	struct sadb_x_ipsecrequest *rq;
	struct xfrm_selector sel;
	struct xfrm_migrate m[XFRM_MAX_DEPTH];
2471
	struct xfrm_kmaddress k;
2472 2473

	if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2474
				     ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2475 2476 2477 2478 2479
	    !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
		err = -EINVAL;
		goto out;
	}

2480
	kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
2481 2482 2483 2484 2485 2486 2487
	pol = ext_hdrs[SADB_X_EXT_POLICY - 1];

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

2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499
	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;
		}
	}

2500 2501 2502 2503 2504 2505 2506 2507 2508 2509
	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
2510
		sel.sport_mask = htons(0xffff);
2511 2512 2513 2514 2515 2516 2517 2518

	/* 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
2519
		sel.dport_mask = htons(0xffff);
2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543

	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;
	}

2544 2545
	return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
			    kma ? &k : NULL);
2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558

 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
2559 2560
static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
2561
	struct net *net = sock_net(sk);
2562
	unsigned int dir;
2563
	int err = 0, delete;
L
Linus Torvalds 已提交
2564 2565
	struct sadb_x_policy *pol;
	struct xfrm_policy *xp;
2566
	struct km_event c;
L
Linus Torvalds 已提交
2567 2568 2569 2570

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

2571 2572 2573 2574
	dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
	if (dir >= XFRM_POLICY_MAX)
		return -EINVAL;

2575
	delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2576
	xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2577
			      dir, pol->sadb_x_policy_id, delete, &err);
L
Linus Torvalds 已提交
2578 2579 2580
	if (xp == NULL)
		return -ENOENT;

2581
	if (delete) {
J
Joy Latten 已提交
2582
		xfrm_audit_policy_delete(xp, err ? 0 : 1,
2583 2584
				audit_get_loginuid(current),
				audit_get_sessionid(current), 0);
L
Linus Torvalds 已提交
2585

2586 2587 2588 2589
		if (err)
			goto out;
		c.seq = hdr->sadb_msg_seq;
		c.pid = hdr->sadb_msg_pid;
2590
		c.data.byid = 1;
2591
		c.event = XFRM_MSG_DELPOLICY;
2592
		km_policy_notify(xp, dir, &c);
2593
	} else {
2594
		err = key_pol_get_resp(sk, xp, hdr, dir);
L
Linus Torvalds 已提交
2595 2596
	}

2597
out:
L
Linus Torvalds 已提交
2598 2599 2600 2601 2602 2603
	xfrm_pol_put(xp);
	return err;
}

static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
{
2604
	struct pfkey_sock *pfk = ptr;
L
Linus Torvalds 已提交
2605 2606
	struct sk_buff *out_skb;
	struct sadb_msg *out_hdr;
2607
	int err;
L
Linus Torvalds 已提交
2608

2609 2610 2611
	if (!pfkey_can_dump(&pfk->sk))
		return -ENOBUFS;

L
Linus Torvalds 已提交
2612 2613 2614 2615
	out_skb = pfkey_xfrm_policy2msg_prep(xp);
	if (IS_ERR(out_skb))
		return PTR_ERR(out_skb);

2616 2617 2618
	err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
	if (err < 0)
		return err;
L
Linus Torvalds 已提交
2619 2620

	out_hdr = (struct sadb_msg *) out_skb->data;
2621
	out_hdr->sadb_msg_version = pfk->dump.msg_version;
L
Linus Torvalds 已提交
2622 2623 2624
	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
2625
	out_hdr->sadb_msg_seq = count + 1;
2626
	out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
H
Herbert Xu 已提交
2627 2628 2629

	if (pfk->dump.skb)
		pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
A
Alexey Dobriyan 已提交
2630
				&pfk->sk, sock_net(&pfk->sk));
H
Herbert Xu 已提交
2631 2632
	pfk->dump.skb = out_skb;

L
Linus Torvalds 已提交
2633 2634 2635
	return 0;
}

2636 2637
static int pfkey_dump_sp(struct pfkey_sock *pfk)
{
A
Alexey Dobriyan 已提交
2638 2639
	struct net *net = sock_net(&pfk->sk);
	return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
2640 2641 2642 2643 2644 2645 2646
}

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

L
Linus Torvalds 已提交
2647 2648
static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
2649
	struct pfkey_sock *pfk = pfkey_sk(sk);
2650

2651 2652
	if (pfk->dump.dump != NULL)
		return -EBUSY;
L
Linus Torvalds 已提交
2653

2654 2655 2656 2657 2658 2659 2660
	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
2661 2662
}

2663
static int key_notify_policy_flush(struct km_event *c)
L
Linus Torvalds 已提交
2664 2665
{
	struct sk_buff *skb_out;
2666
	struct sadb_msg *hdr;
L
Linus Torvalds 已提交
2667

2668
	skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
L
Linus Torvalds 已提交
2669 2670
	if (!skb_out)
		return -ENOBUFS;
2671
	hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
J
Jerome Borsboom 已提交
2672
	hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2673 2674 2675 2676 2677
	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
2678
	pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
2679
	return 0;
L
Linus Torvalds 已提交
2680

2681 2682 2683 2684
}

static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
2685
	struct net *net = sock_net(sk);
2686
	struct km_event c;
J
Joy Latten 已提交
2687
	struct xfrm_audit audit_info;
2688
	int err, err2;
L
Linus Torvalds 已提交
2689

2690
	audit_info.loginuid = audit_get_loginuid(current);
2691
	audit_info.sessionid = audit_get_sessionid(current);
J
Joy Latten 已提交
2692
	audit_info.secid = 0;
A
Alexey Dobriyan 已提交
2693
	err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info);
2694
	err2 = unicast_flush_resp(sk, hdr);
2695 2696 2697 2698 2699
	if (err || err2) {
		if (err == -ESRCH) /* empty table - old silent behavior */
			return 0;
		return err;
	}
2700

2701
	c.data.type = XFRM_POLICY_TYPE_MAIN;
2702
	c.event = XFRM_MSG_FLUSHPOLICY;
2703 2704
	c.pid = hdr->sadb_msg_pid;
	c.seq = hdr->sadb_msg_seq;
A
Alexey Dobriyan 已提交
2705
	c.net = net;
2706
	km_policy_notify(NULL, 0, &c);
L
Linus Torvalds 已提交
2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735

	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,
2736
	[SADB_X_MIGRATE]	= pfkey_migrate,
L
Linus Torvalds 已提交
2737 2738 2739 2740 2741 2742 2743 2744
};

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
2745
			BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
L
Linus Torvalds 已提交
2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785

	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)
{
2786 2787 2788 2789 2790 2791
	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
2792 2793 2794 2795
}

static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
{
2796 2797 2798 2799 2800 2801
	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
2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825
}

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;
2826

L
Linus Torvalds 已提交
2827 2828
		if (!(ealg_tmpl_set(t, ealg) && ealg->available))
			continue;
2829

L
Linus Torvalds 已提交
2830 2831 2832 2833
		for (k = 1; ; k++) {
			struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
			if (!aalg)
				break;
2834

L
Linus Torvalds 已提交
2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 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
			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;
2889

L
Linus Torvalds 已提交
2890 2891
		if (!(ealg_tmpl_set(t, ealg) && ealg->available))
			continue;
2892

L
Linus Torvalds 已提交
2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916
		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;
		}
	}
}

2917 2918 2919 2920 2921 2922
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
2923 2924 2925
{
	struct sk_buff *out_skb;
	struct sadb_msg *out_hdr;
2926 2927 2928
	int hard;
	int hsc;

2929
	hard = c->data.hard;
2930 2931 2932 2933
	if (hard)
		hsc = 2;
	else
		hsc = 1;
L
Linus Torvalds 已提交
2934

2935
	out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
L
Linus Torvalds 已提交
2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947
	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
2948
	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
L
Linus Torvalds 已提交
2949 2950 2951
	return 0;
}

2952 2953
static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
{
A
Alexey Dobriyan 已提交
2954
	struct net *net = x ? xs_net(x) : c->net;
A
Alexey Dobriyan 已提交
2955 2956 2957
	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);

	if (atomic_read(&net_pfkey->socks_nr) == 0)
2958 2959
		return 0;

2960
	switch (c->event) {
2961
	case XFRM_MSG_EXPIRE:
2962
		return key_notify_sa_expire(x, c);
2963 2964 2965
	case XFRM_MSG_DELSA:
	case XFRM_MSG_NEWSA:
	case XFRM_MSG_UPDSA:
2966
		return key_notify_sa(x, c);
2967
	case XFRM_MSG_FLUSHSA:
2968
		return key_notify_sa_flush(c);
J
Jamal Hadi Salim 已提交
2969 2970
	case XFRM_MSG_NEWAE: /* not yet supported */
		break;
2971
	default:
2972
		pr_err("pfkey: Unknown SA event %d\n", c->event);
2973 2974 2975 2976 2977 2978 2979 2980
		break;
	}

	return 0;
}

static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
{
2981 2982 2983
	if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
		return 0;

2984
	switch (c->event) {
2985
	case XFRM_MSG_POLEXPIRE:
2986
		return key_notify_policy_expire(xp, c);
2987 2988 2989
	case XFRM_MSG_DELPOLICY:
	case XFRM_MSG_NEWPOLICY:
	case XFRM_MSG_UPDPOLICY:
2990
		return key_notify_policy(xp, dir, c);
2991
	case XFRM_MSG_FLUSHPOLICY:
2992 2993
		if (c->data.type != XFRM_POLICY_TYPE_MAIN)
			break;
2994 2995
		return key_notify_policy_flush(c);
	default:
2996
		pr_err("pfkey: Unknown policy event %d\n", c->event);
2997 2998 2999 3000 3001 3002
		break;
	}

	return 0;
}

L
Linus Torvalds 已提交
3003 3004 3005
static u32 get_acqseq(void)
{
	u32 res;
3006
	static atomic_t acqseq;
L
Linus Torvalds 已提交
3007

3008 3009 3010
	do {
		res = atomic_inc_return(&acqseq);
	} while (!res);
L
Linus Torvalds 已提交
3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021
	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;
3022 3023 3024
	struct sadb_x_sec_ctx *sec_ctx;
	struct xfrm_sec_ctx *xfrm_ctx;
	int ctx_size = 0;
3025

L
Linus Torvalds 已提交
3026 3027 3028 3029 3030 3031 3032 3033
	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);
3034

L
Linus Torvalds 已提交
3035 3036 3037 3038 3039
	if (x->id.proto == IPPROTO_AH)
		size += count_ah_combs(t);
	else if (x->id.proto == IPPROTO_ESP)
		size += count_esp_combs(t);

3040 3041 3042 3043 3044
	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
3045 3046 3047
	skb =  alloc_skb(size + 16, GFP_ATOMIC);
	if (skb == NULL)
		return -ENOMEM;
3048

L
Linus Torvalds 已提交
3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059
	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 */
3060
	addr = (struct sadb_address*) skb_put(skb,
L
Linus Torvalds 已提交
3061
					      sizeof(struct sadb_address)+sockaddr_size);
3062
	addr->sadb_address_len =
L
Linus Torvalds 已提交
3063 3064 3065 3066 3067
		(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;
3068 3069 3070 3071 3072
	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
3073
		BUG();
3074

L
Linus Torvalds 已提交
3075
	/* dst address */
3076
	addr = (struct sadb_address*) skb_put(skb,
L
Linus Torvalds 已提交
3077 3078 3079 3080 3081 3082 3083
					      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;
3084 3085 3086 3087 3088
	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
3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103
		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);

3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117
	/* 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
3118
	return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
L
Linus Torvalds 已提交
3119 3120
}

3121
static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3122
						u8 *data, int len, int *dir)
L
Linus Torvalds 已提交
3123
{
A
Alexey Dobriyan 已提交
3124
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
3125 3126
	struct xfrm_policy *xp;
	struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3127
	struct sadb_x_sec_ctx *sec_ctx;
L
Linus Torvalds 已提交
3128

3129
	switch (sk->sk_family) {
L
Linus Torvalds 已提交
3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156
	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
3157
	xp = xfrm_policy_alloc(net, GFP_ATOMIC);
L
Linus Torvalds 已提交
3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169
	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;
3170
	xp->family = sk->sk_family;
L
Linus Torvalds 已提交
3171 3172 3173 3174 3175 3176

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

3177 3178 3179 3180 3181 3182 3183 3184 3185
	/* 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 +
3186 3187
		    sec_ctx->sadb_x_sec_len) {
			*dir = -EINVAL;
3188
			goto out;
3189
		}
3190 3191 3192
		if ((*dir = verify_sec_ctx_len(p)))
			goto out;
		uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3193
		*dir = security_xfrm_policy_alloc(&xp->security, uctx);
3194 3195 3196 3197 3198 3199
		kfree(uctx);

		if (*dir)
			goto out;
	}

L
Linus Torvalds 已提交
3200 3201 3202 3203
	*dir = pol->sadb_x_policy_dir-1;
	return xp;

out:
3204
	xp->walk.dead = 1;
3205
	xfrm_policy_destroy(xp);
L
Linus Torvalds 已提交
3206 3207 3208
	return NULL;
}

A
Al Viro 已提交
3209
static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
L
Linus Torvalds 已提交
3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237
{
	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)
	 */
3238

L
Linus Torvalds 已提交
3239 3240 3241 3242 3243
	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);
3244

L
Linus Torvalds 已提交
3245 3246 3247
	skb =  alloc_skb(size + 16, GFP_ATOMIC);
	if (skb == NULL)
		return -ENOMEM;
3248

L
Linus Torvalds 已提交
3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272
	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);
3273
	addr->sadb_address_len =
L
Linus Torvalds 已提交
3274 3275 3276 3277 3278
		(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;
3279 3280 3281 3282 3283
	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
3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295
		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);
3296
	addr->sadb_address_len =
L
Linus Torvalds 已提交
3297 3298 3299 3300 3301
		(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;
3302 3303 3304 3305 3306
	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
3307 3308 3309 3310 3311 3312 3313 3314 3315
		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
3316
	return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
L
Linus Torvalds 已提交
3317 3318
}

3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331
#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:
3332 3333 3334 3335
		addr->sadb_address_prefixlen = sel->prefixlen_s;
		pfkey_sockaddr_fill(&sel->saddr, 0,
				    (struct sockaddr *)(addr + 1),
				    sel->family);
3336 3337
		break;
	case SADB_EXT_ADDRESS_DST:
3338 3339 3340 3341
		addr->sadb_address_prefixlen = sel->prefixlen_d;
		pfkey_sockaddr_fill(&sel->daddr, 0,
				    (struct sockaddr *)(addr + 1),
				    sel->family);
3342 3343 3344 3345 3346 3347 3348 3349
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375

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;
}

3376 3377 3378 3379 3380 3381
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;
3382 3383
	u8 *sa;
	int socklen = pfkey_sockaddr_len(family);
3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396
	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;

3397 3398 3399
	sa = (u8 *) (rq + 1);
	if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
	    !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3400 3401 3402 3403 3404 3405 3406 3407
		return -EINVAL;

	return 0;
}
#endif

#ifdef CONFIG_NET_KEY_MIGRATE
static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3408 3409
			      struct xfrm_migrate *m, int num_bundles,
			      struct xfrm_kmaddress *k)
3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425
{
	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;

3426 3427 3428 3429 3430 3431
	if (k != NULL) {
		/* addresses for KM */
		size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
				     pfkey_sockaddr_pair_size(k->family));
	}

3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467
	/* 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;

3468 3469 3470 3471
	/* Addresses to be used by KM for negotiation, if ext is available */
	if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
		return -EINVAL;

3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488
	/* 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 */
3489 3490
		int mode = pfkey_mode_from_xfrm(mp->mode);
		if (mode < 0)
3491
			goto err;
3492
		if (set_ipsecrequest(skb, mp->proto, mode,
3493 3494
				     (mp->reqid ?  IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
				     mp->reqid, mp->old_family,
3495 3496
				     &mp->old_saddr, &mp->old_daddr) < 0)
			goto err;
3497 3498

		/* new ipsecrequest */
3499
		if (set_ipsecrequest(skb, mp->proto, mode,
3500 3501
				     (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
				     mp->reqid, mp->new_family,
3502 3503
				     &mp->new_saddr, &mp->new_daddr) < 0)
			goto err;
3504 3505 3506
	}

	/* broadcast migrate message to sockets */
A
Alexey Dobriyan 已提交
3507
	pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
3508 3509

	return 0;
3510 3511 3512 3513

err:
	kfree_skb(skb);
	return -EINVAL;
3514 3515 3516
}
#else
static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3517 3518
			      struct xfrm_migrate *m, int num_bundles,
			      struct xfrm_kmaddress *k)
3519 3520 3521 3522 3523
{
	return -ENOPROTOOPT;
}
#endif

L
Linus Torvalds 已提交
3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552
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
3553
	mutex_lock(&xfrm_cfg_mutex);
L
Linus Torvalds 已提交
3554
	err = pfkey_process(sk, skb, hdr);
A
Arjan van de Ven 已提交
3555
	mutex_unlock(&xfrm_cfg_mutex);
L
Linus Torvalds 已提交
3556 3557 3558 3559

out:
	if (err && hdr && pfkey_error(hdr, err, sk) == 0)
		err = 0;
3560
	kfree_skb(skb);
L
Linus Torvalds 已提交
3561 3562 3563 3564 3565 3566 3567 3568 3569

	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;
3570
	struct pfkey_sock *pfk = pfkey_sk(sk);
L
Linus Torvalds 已提交
3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588
	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;
	}

3589
	skb_reset_transport_header(skb);
L
Linus Torvalds 已提交
3590 3591 3592 3593
	err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
	if (err)
		goto out_free;

3594
	sock_recv_ts_and_drops(msg, sk, skb);
L
Linus Torvalds 已提交
3595 3596 3597

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

3598 3599 3600 3601
	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
3602 3603 3604 3605 3606 3607
out_free:
	skb_free_datagram(sk, skb);
out:
	return err;
}

3608
static const struct proto_ops pfkey_ops = {
L
Linus Torvalds 已提交
3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631
	.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,
};

3632
static const struct net_proto_family pfkey_family_ops = {
L
Linus Torvalds 已提交
3633 3634 3635 3636 3637 3638
	.family	=	PF_KEY,
	.create	=	pfkey_create,
	.owner	=	THIS_MODULE,
};

#ifdef CONFIG_PROC_FS
3639
static int pfkey_seq_show(struct seq_file *f, void *v)
L
Linus Torvalds 已提交
3640
{
3641
	struct sock *s = sk_entry(v);
L
Linus Torvalds 已提交
3642

3643 3644 3645 3646
	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
3647 3648
			       s,
			       atomic_read(&s->sk_refcnt),
3649 3650
			       sk_rmem_alloc_get(s),
			       sk_wmem_alloc_get(s),
L
Linus Torvalds 已提交
3651 3652 3653
			       sock_i_uid(s),
			       sock_i_ino(s)
			       );
3654 3655 3656 3657 3658
	return 0;
}

static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
{
3659
	struct net *net = seq_file_net(f);
A
Alexey Dobriyan 已提交
3660
	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
L
Linus Torvalds 已提交
3661

S
stephen hemminger 已提交
3662 3663
	rcu_read_lock();
	return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
3664 3665 3666 3667
}

static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
{
3668
	struct net *net = seq_file_net(f);
A
Alexey Dobriyan 已提交
3669 3670
	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);

S
stephen hemminger 已提交
3671
	return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
3672
}
L
Linus Torvalds 已提交
3673

3674 3675
static void pfkey_seq_stop(struct seq_file *f, void *v)
{
S
stephen hemminger 已提交
3676
	rcu_read_unlock();
3677
}
L
Linus Torvalds 已提交
3678

3679
static const struct seq_operations pfkey_seq_ops = {
3680 3681 3682 3683 3684
	.start	= pfkey_seq_start,
	.next	= pfkey_seq_next,
	.stop	= pfkey_seq_stop,
	.show	= pfkey_seq_show,
};
L
Linus Torvalds 已提交
3685

3686 3687
static int pfkey_seq_open(struct inode *inode, struct file *file)
{
3688 3689
	return seq_open_net(inode, file, &pfkey_seq_ops,
			    sizeof(struct seq_net_private));
L
Linus Torvalds 已提交
3690
}
3691

3692
static const struct file_operations pfkey_proc_ops = {
3693 3694 3695
	.open	 = pfkey_seq_open,
	.read	 = seq_read,
	.llseek	 = seq_lseek,
3696
	.release = seq_release_net,
3697 3698
};

3699
static int __net_init pfkey_init_proc(struct net *net)
3700
{
3701 3702
	struct proc_dir_entry *e;

3703
	e = proc_net_fops_create(net, "pfkey", 0, &pfkey_proc_ops);
3704
	if (e == NULL)
3705
		return -ENOMEM;
3706 3707

	return 0;
3708 3709
}

3710
static void __net_exit pfkey_exit_proc(struct net *net)
3711
{
3712
	proc_net_remove(net, "pfkey");
3713 3714
}
#else
3715
static inline int pfkey_init_proc(struct net *net)
3716 3717 3718 3719
{
	return 0;
}

3720
static inline void pfkey_exit_proc(struct net *net)
3721 3722
{
}
L
Linus Torvalds 已提交
3723 3724 3725 3726 3727 3728 3729 3730 3731
#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,
3732
	.notify_policy	= pfkey_send_policy_notify,
3733
	.migrate	= pfkey_send_migrate,
L
Linus Torvalds 已提交
3734 3735
};

A
Alexey Dobriyan 已提交
3736 3737
static int __net_init pfkey_net_init(struct net *net)
{
3738
	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
A
Alexey Dobriyan 已提交
3739 3740 3741 3742
	int rv;

	INIT_HLIST_HEAD(&net_pfkey->table);
	atomic_set(&net_pfkey->socks_nr, 0);
3743

3744
	rv = pfkey_init_proc(net);
A
Alexey Dobriyan 已提交
3745 3746 3747 3748 3749 3750 3751 3752

	return rv;
}

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

3753
	pfkey_exit_proc(net);
A
Alexey Dobriyan 已提交
3754 3755 3756 3757 3758 3759
	BUG_ON(!hlist_empty(&net_pfkey->table));
}

static struct pernet_operations pfkey_net_ops = {
	.init = pfkey_net_init,
	.exit = pfkey_net_exit,
3760 3761
	.id   = &pfkey_net_id,
	.size = sizeof(struct netns_pfkey),
A
Alexey Dobriyan 已提交
3762 3763
};

L
Linus Torvalds 已提交
3764 3765 3766 3767
static void __exit ipsec_pfkey_exit(void)
{
	xfrm_unregister_km(&pfkeyv2_mgr);
	sock_unregister(PF_KEY);
3768
	unregister_pernet_subsys(&pfkey_net_ops);
L
Linus Torvalds 已提交
3769 3770 3771 3772 3773 3774 3775 3776 3777 3778
	proto_unregister(&key_proto);
}

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

	if (err != 0)
		goto out;

3779
	err = register_pernet_subsys(&pfkey_net_ops);
L
Linus Torvalds 已提交
3780 3781
	if (err != 0)
		goto out_unregister_key_proto;
3782 3783 3784
	err = sock_register(&pfkey_family_ops);
	if (err != 0)
		goto out_unregister_pernet;
L
Linus Torvalds 已提交
3785 3786
	err = xfrm_register_km(&pfkeyv2_mgr);
	if (err != 0)
3787
		goto out_sock_unregister;
L
Linus Torvalds 已提交
3788 3789
out:
	return err;
3790

L
Linus Torvalds 已提交
3791 3792
out_sock_unregister:
	sock_unregister(PF_KEY);
3793 3794
out_unregister_pernet:
	unregister_pernet_subsys(&pfkey_net_ops);
L
Linus Torvalds 已提交
3795 3796 3797 3798 3799 3800 3801 3802 3803
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);