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

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

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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
1027 1028
static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
						struct sadb_msg *hdr,
L
Linus Torvalds 已提交
1029 1030
						void **ext_hdrs)
{
1031
	struct xfrm_state *x;
L
Linus Torvalds 已提交
1032 1033 1034
	struct sadb_lifetime *lifetime;
	struct sadb_sa *sa;
	struct sadb_key *key;
1035
	struct sadb_x_sec_ctx *sec_ctx;
L
Linus Torvalds 已提交
1036 1037
	uint16_t proto;
	int err;
1038

L
Linus Torvalds 已提交
1039 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

	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.

1071
	   However, KAME setkey always uses SADB_SASTATE_LARVAL.
L
Linus Torvalds 已提交
1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091
	   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
1092
	x = xfrm_state_alloc(net);
L
Linus Torvalds 已提交
1093 1094 1095 1096 1097 1098 1099 1100 1101 1102
	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;
1103 1104
	if (sa->sadb_sa_flags & SADB_SAFLAGS_NOPMTUDISC)
		x->props.flags |= XFRM_STATE_NOPMTUDISC;
L
Linus Torvalds 已提交
1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119

	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;
	}
1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134

	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
1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153
	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);
		}
1154
		x->aalg->alg_trunc_len = a->uinfo.auth.icv_truncbits;
L
Linus Torvalds 已提交
1155 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
		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; */

1194
	x->props.family = pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
L
Linus Torvalds 已提交
1195 1196 1197 1198 1199
						    &x->props.saddr);
	if (!x->props.family) {
		err = -EAFNOSUPPORT;
		goto out;
	}
1200
	pfkey_sadb_addr2xfrm_addr((struct sadb_address *) ext_hdrs[SADB_EXT_ADDRESS_DST-1],
L
Linus Torvalds 已提交
1201 1202 1203 1204
				  &x->id.daddr);

	if (ext_hdrs[SADB_X_EXT_SA2-1]) {
		struct sadb_x_sa2 *sa2 = (void*)ext_hdrs[SADB_X_EXT_SA2-1];
1205 1206 1207 1208 1209 1210
		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
1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221
		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;
	}

1222
	if (!x->sel.family)
1223 1224
		x->sel.family = x->props.family;

L
Linus Torvalds 已提交
1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246
	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
1247
		memset(&natt->encap_oa, 0, sizeof(natt->encap_oa));
L
Linus Torvalds 已提交
1248 1249
	}

H
Herbert Xu 已提交
1250 1251
	err = xfrm_init_state(x);
	if (err)
L
Linus Torvalds 已提交
1252
		goto out;
H
Herbert Xu 已提交
1253

L
Linus Torvalds 已提交
1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269
	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
1270
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
1271 1272 1273 1274
	struct sk_buff *resp_skb;
	struct sadb_x_sa2 *sa2;
	struct sadb_address *saddr, *daddr;
	struct sadb_msg *out_hdr;
1275
	struct sadb_spirange *range;
L
Linus Torvalds 已提交
1276
	struct xfrm_state *x = NULL;
1277
	int mode;
1278 1279
	int err;
	u32 min_spi, max_spi;
L
Linus Torvalds 已提交
1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293
	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) {
1294 1295 1296
		mode = pfkey_mode_to_xfrm(sa2->sadb_x_sa2_mode);
		if (mode < 0)
			return -EINVAL;
L
Linus Torvalds 已提交
1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320
		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) {
1321
		x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
L
Linus Torvalds 已提交
1322 1323 1324 1325 1326 1327 1328
		if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
			xfrm_state_put(x);
			x = NULL;
		}
	}

	if (!x)
1329
		x = xfrm_find_acq(net, &dummy_mark, mode, reqid, proto, xdaddr, xsaddr, 1, family);
L
Linus Torvalds 已提交
1330 1331 1332 1333

	if (x == NULL)
		return -ENOENT;

1334 1335
	min_spi = 0x100;
	max_spi = 0x0fffffff;
L
Linus Torvalds 已提交
1336

1337 1338 1339 1340
	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
1341
	}
1342 1343

	err = xfrm_alloc_spi(x, min_spi, max_spi);
1344
	resp_skb = err ? ERR_PTR(err) : pfkey_xfrm_state2msg(x);
L
Linus Torvalds 已提交
1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361

	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
1362
	pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
L
Linus Torvalds 已提交
1363 1364 1365 1366 1367 1368

	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
1369
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
1370 1371 1372 1373 1374 1375 1376 1377
	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;

1378
	x = xfrm_find_acq_byseq(net, DUMMY_MARK, hdr->sadb_msg_seq);
L
Linus Torvalds 已提交
1379 1380 1381 1382 1383 1384
	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
1385
		wake_up(&net->xfrm.km_waitq);
L
Linus Torvalds 已提交
1386 1387 1388 1389 1390 1391
	}
	spin_unlock_bh(&x->lock);
	xfrm_state_put(x);
	return 0;
}

1392 1393 1394
static inline int event2poltype(int event)
{
	switch (event) {
1395
	case XFRM_MSG_DELPOLICY:
1396
		return SADB_X_SPDDELETE;
1397
	case XFRM_MSG_NEWPOLICY:
1398
		return SADB_X_SPDADD;
1399
	case XFRM_MSG_UPDPOLICY:
1400
		return SADB_X_SPDUPDATE;
1401
	case XFRM_MSG_POLEXPIRE:
1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413
	//	return SADB_X_SPDEXPIRE;
	default:
		printk("pfkey: Unknown policy event %d\n", event);
		break;
	}

	return 0;
}

static inline int event2keytype(int event)
{
	switch (event) {
1414
	case XFRM_MSG_DELSA:
1415
		return SADB_DELETE;
1416
	case XFRM_MSG_NEWSA:
1417
		return SADB_ADD;
1418
	case XFRM_MSG_UPDSA:
1419
		return SADB_UPDATE;
1420
	case XFRM_MSG_EXPIRE:
1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435
		return SADB_EXPIRE;
	default:
		printk("pfkey: Unknown SA event %d\n", event);
		break;
	}

	return 0;
}

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

1436
	skb = pfkey_xfrm_state2msg(x);
1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449

	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
1450
	pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
1451 1452 1453

	return 0;
}
L
Linus Torvalds 已提交
1454 1455 1456

static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
1457
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
1458 1459
	struct xfrm_state *x;
	int err;
1460
	struct km_event c;
L
Linus Torvalds 已提交
1461

A
Alexey Dobriyan 已提交
1462
	x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
L
Linus Torvalds 已提交
1463 1464 1465
	if (IS_ERR(x))
		return PTR_ERR(x);

1466
	xfrm_state_hold(x);
L
Linus Torvalds 已提交
1467 1468 1469 1470 1471
	if (hdr->sadb_msg_type == SADB_ADD)
		err = xfrm_state_add(x);
	else
		err = xfrm_state_update(x);

J
Joy Latten 已提交
1472
	xfrm_audit_state_add(x, err ? 0 : 1,
1473 1474
			     audit_get_loginuid(current),
			     audit_get_sessionid(current), 0);
J
Joy Latten 已提交
1475

L
Linus Torvalds 已提交
1476 1477
	if (err < 0) {
		x->km.state = XFRM_STATE_DEAD;
1478
		__xfrm_state_put(x);
1479
		goto out;
L
Linus Torvalds 已提交
1480 1481
	}

1482
	if (hdr->sadb_msg_type == SADB_ADD)
1483
		c.event = XFRM_MSG_NEWSA;
1484
	else
1485
		c.event = XFRM_MSG_UPDSA;
1486 1487 1488
	c.seq = hdr->sadb_msg_seq;
	c.pid = hdr->sadb_msg_pid;
	km_state_notify(x, &c);
1489
out:
1490 1491
	xfrm_state_put(x);
	return err;
L
Linus Torvalds 已提交
1492 1493 1494 1495
}

static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
1496
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
1497
	struct xfrm_state *x;
1498 1499
	struct km_event c;
	int err;
L
Linus Torvalds 已提交
1500 1501 1502 1503 1504 1505

	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
1506
	x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
L
Linus Torvalds 已提交
1507 1508 1509
	if (x == NULL)
		return -ESRCH;

C
Catherine Zhang 已提交
1510 1511 1512
	if ((err = security_xfrm_state_delete(x)))
		goto out;

L
Linus Torvalds 已提交
1513
	if (xfrm_state_kern(x)) {
C
Catherine Zhang 已提交
1514 1515
		err = -EPERM;
		goto out;
L
Linus Torvalds 已提交
1516
	}
J
Joy Latten 已提交
1517

1518
	err = xfrm_state_delete(x);
J
Joy Latten 已提交
1519

C
Catherine Zhang 已提交
1520 1521
	if (err < 0)
		goto out;
L
Linus Torvalds 已提交
1522

1523 1524
	c.seq = hdr->sadb_msg_seq;
	c.pid = hdr->sadb_msg_pid;
1525
	c.event = XFRM_MSG_DELSA;
1526
	km_state_notify(x, &c);
C
Catherine Zhang 已提交
1527
out:
J
Joy Latten 已提交
1528
	xfrm_audit_state_delete(x, err ? 0 : 1,
1529 1530
				audit_get_loginuid(current),
				audit_get_sessionid(current), 0);
1531
	xfrm_state_put(x);
L
Linus Torvalds 已提交
1532

1533
	return err;
L
Linus Torvalds 已提交
1534 1535 1536 1537
}

static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
1538
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
1539 1540 1541 1542 1543 1544 1545 1546 1547 1548
	__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
1549
	x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
L
Linus Torvalds 已提交
1550 1551 1552
	if (x == NULL)
		return -ESRCH;

1553
	out_skb = pfkey_xfrm_state2msg(x);
L
Linus Torvalds 已提交
1554 1555 1556 1557 1558 1559 1560
	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;
1561
	out_hdr->sadb_msg_type = SADB_GET;
L
Linus Torvalds 已提交
1562 1563 1564 1565 1566
	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
1567
	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
L
Linus Torvalds 已提交
1568 1569 1570 1571

	return 0;
}

1572
static struct sk_buff *compose_sadb_supported(struct sadb_msg *orig,
A
Al Viro 已提交
1573
					      gfp_t allocation)
L
Linus Torvalds 已提交
1574 1575 1576 1577 1578 1579 1580 1581 1582 1583
{
	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);
	}
1584

L
Linus Torvalds 已提交
1585 1586 1587 1588 1589
	enc_len = xfrm_count_enc_supported();
	if (enc_len) {
		enc_len *= sizeof(struct sadb_alg);
		enc_len += sizeof(struct sadb_supported);
	}
1590

L
Linus Torvalds 已提交
1591 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
	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();
1659

L
Linus Torvalds 已提交
1660 1661 1662 1663 1664 1665 1666 1667
	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
1668
	pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, sock_net(sk));
L
Linus Torvalds 已提交
1669 1670 1671 1672

	return 0;
}

1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689
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));
}

1690 1691 1692 1693 1694 1695 1696 1697 1698
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));
1699
	hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
J
Jerome Borsboom 已提交
1700
	hdr->sadb_msg_type = SADB_FLUSH;
1701 1702 1703 1704 1705 1706
	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
1707
	pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
1708 1709 1710 1711

	return 0;
}

L
Linus Torvalds 已提交
1712 1713
static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
1714
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
1715
	unsigned proto;
1716
	struct km_event c;
J
Joy Latten 已提交
1717
	struct xfrm_audit audit_info;
1718
	int err, err2;
L
Linus Torvalds 已提交
1719 1720 1721 1722 1723

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

1724
	audit_info.loginuid = audit_get_loginuid(current);
1725
	audit_info.sessionid = audit_get_sessionid(current);
J
Joy Latten 已提交
1726
	audit_info.secid = 0;
A
Alexey Dobriyan 已提交
1727
	err = xfrm_state_flush(net, proto, &audit_info);
1728
	err2 = unicast_flush_resp(sk, hdr);
1729 1730 1731
	if (err || err2) {
		if (err == -ESRCH) /* empty table - go quietly */
			err = 0;
1732
		return err ? err : err2;
1733
	}
1734

1735
	c.data.proto = proto;
1736 1737
	c.seq = hdr->sadb_msg_seq;
	c.pid = hdr->sadb_msg_pid;
1738
	c.event = XFRM_MSG_FLUSHSA;
A
Alexey Dobriyan 已提交
1739
	c.net = net;
1740
	km_state_notify(NULL, &c);
L
Linus Torvalds 已提交
1741 1742 1743 1744 1745 1746

	return 0;
}

static int dump_sa(struct xfrm_state *x, int count, void *ptr)
{
1747
	struct pfkey_sock *pfk = ptr;
L
Linus Torvalds 已提交
1748 1749 1750
	struct sk_buff *out_skb;
	struct sadb_msg *out_hdr;

1751 1752 1753
	if (!pfkey_can_dump(&pfk->sk))
		return -ENOBUFS;

1754
	out_skb = pfkey_xfrm_state2msg(x);
L
Linus Torvalds 已提交
1755 1756 1757 1758
	if (IS_ERR(out_skb))
		return PTR_ERR(out_skb);

	out_hdr = (struct sadb_msg *) out_skb->data;
1759
	out_hdr->sadb_msg_version = pfk->dump.msg_version;
L
Linus Torvalds 已提交
1760 1761 1762 1763
	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
1764
	out_hdr->sadb_msg_seq = count + 1;
1765
	out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
H
Herbert Xu 已提交
1766 1767 1768

	if (pfk->dump.skb)
		pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
A
Alexey Dobriyan 已提交
1769
				&pfk->sk, sock_net(&pfk->sk));
H
Herbert Xu 已提交
1770 1771
	pfk->dump.skb = out_skb;

L
Linus Torvalds 已提交
1772 1773 1774
	return 0;
}

1775 1776
static int pfkey_dump_sa(struct pfkey_sock *pfk)
{
A
Alexey Dobriyan 已提交
1777 1778
	struct net *net = sock_net(&pfk->sk);
	return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
1779 1780 1781 1782 1783 1784 1785
}

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

L
Linus Torvalds 已提交
1786 1787 1788
static int pfkey_dump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
	u8 proto;
1789 1790 1791 1792
	struct pfkey_sock *pfk = pfkey_sk(sk);

	if (pfk->dump.dump != NULL)
		return -EBUSY;
L
Linus Torvalds 已提交
1793 1794 1795 1796 1797

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

1798 1799 1800 1801 1802
	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);
1803

1804
	return pfkey_do_dump(pfk);
L
Linus Torvalds 已提交
1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818
}

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
1819
	pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
L
Linus Torvalds 已提交
1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834
	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
1835
static u32 gen_reqid(struct net *net)
L
Linus Torvalds 已提交
1836
{
1837
	struct xfrm_policy_walk walk;
L
Linus Torvalds 已提交
1838
	u32 start;
1839
	int rc;
L
Linus Torvalds 已提交
1840 1841 1842 1843 1844 1845 1846
	static u32 reqid = IPSEC_MANUAL_REQID_MAX;

	start = reqid;
	do {
		++reqid;
		if (reqid == 0)
			reqid = IPSEC_MANUAL_REQID_MAX+1;
1847
		xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
A
Alexey Dobriyan 已提交
1848
		rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
1849 1850
		xfrm_policy_walk_done(&walk);
		if (rc != -EEXIST)
L
Linus Torvalds 已提交
1851 1852 1853 1854 1855 1856 1857 1858
			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
1859
	struct net *net = xp_net(xp);
L
Linus Torvalds 已提交
1860
	struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
1861
	int mode;
L
Linus Torvalds 已提交
1862 1863 1864 1865 1866 1867 1868 1869

	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 */
1870 1871 1872
	if ((mode = pfkey_mode_to_xfrm(rq->sadb_x_ipsecrequest_mode)) < 0)
		return -EINVAL;
	t->mode = mode;
L
Linus Torvalds 已提交
1873 1874 1875 1876 1877 1878
	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
1879
		if (!t->reqid && !(t->reqid = gen_reqid(net)))
L
Linus Torvalds 已提交
1880 1881 1882 1883
			return -ENOBUFS;
	}

	/* addresses present only in tunnel mode */
1884
	if (t->mode == XFRM_MODE_TUNNEL) {
1885 1886 1887 1888 1889 1890
		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
1891
			return -EINVAL;
1892 1893 1894 1895 1896 1897

		socklen = pfkey_sockaddr_len(family);
		if (pfkey_sockaddr_extract((struct sockaddr *)(sa + socklen),
					   &t->id.daddr) != family)
			return -EINVAL;
		t->encap_family = family;
1898 1899 1900
	} else
		t->encap_family = xp->family;

L
Linus Torvalds 已提交
1901
	/* No way to set this via kame pfkey */
1902
	t->allalgs = 1;
L
Linus Torvalds 已提交
1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922
	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;
}

1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934
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
1935 1936
static int pfkey_xfrm_policy2msg_size(struct xfrm_policy *xp)
{
1937
	struct xfrm_tmpl *t;
L
Linus Torvalds 已提交
1938
	int sockaddr_size = pfkey_sockaddr_size(xp->family);
1939 1940 1941 1942 1943
	int socklen = 0;
	int i;

	for (i=0; i<xp->xfrm_nr; i++) {
		t = xp->xfrm_vec + i;
1944
		socklen += pfkey_sockaddr_len(t->encap_family);
1945
	}
L
Linus Torvalds 已提交
1946 1947 1948

	return sizeof(struct sadb_msg) +
		(sizeof(struct sadb_lifetime) * 3) +
1949
		(sizeof(struct sadb_address) * 2) +
L
Linus Torvalds 已提交
1950 1951
		(sockaddr_size * 2) +
		sizeof(struct sadb_x_policy) +
1952 1953
		(xp->xfrm_nr * sizeof(struct sadb_x_ipsecrequest)) +
		(socklen * 2) +
1954
		pfkey_xfrm_policy2sec_ctx_size(xp);
L
Linus Torvalds 已提交
1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970
}

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;
}

1971
static int pfkey_xfrm_policy2msg(struct sk_buff *skb, struct xfrm_policy *xp, int dir)
L
Linus Torvalds 已提交
1972 1973 1974 1975 1976
{
	struct sadb_msg *hdr;
	struct sadb_address *addr;
	struct sadb_lifetime *lifetime;
	struct sadb_x_policy *pol;
1977 1978
	struct sadb_x_sec_ctx *sec_ctx;
	struct xfrm_sec_ctx *xfrm_ctx;
L
Linus Torvalds 已提交
1979 1980 1981
	int i;
	int size;
	int sockaddr_size = pfkey_sockaddr_size(xp->family);
1982
	int socklen = pfkey_sockaddr_len(xp->family);
L
Linus Torvalds 已提交
1983 1984 1985 1986 1987 1988 1989 1990

	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 */
1991
	addr = (struct sadb_address*) skb_put(skb,
L
Linus Torvalds 已提交
1992
					      sizeof(struct sadb_address)+sockaddr_size);
1993
	addr->sadb_address_len =
L
Linus Torvalds 已提交
1994 1995 1996 1997 1998 1999
		(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;
2000 2001 2002 2003
	if (!pfkey_sockaddr_fill(&xp->selector.saddr,
				 xp->selector.sport,
				 (struct sockaddr *) (addr + 1),
				 xp->family))
L
Linus Torvalds 已提交
2004 2005 2006
		BUG();

	/* dst address */
2007
	addr = (struct sadb_address*) skb_put(skb,
L
Linus Torvalds 已提交
2008 2009 2010 2011 2012 2013
					      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);
2014
	addr->sadb_address_prefixlen = xp->selector.prefixlen_d;
L
Linus Torvalds 已提交
2015
	addr->sadb_address_reserved = 0;
2016 2017 2018 2019

	pfkey_sockaddr_fill(&xp->selector.daddr, xp->selector.dport,
			    (struct sockaddr *) (addr + 1),
			    xp->family);
L
Linus Torvalds 已提交
2020 2021

	/* hard time */
2022
	lifetime = (struct sadb_lifetime *)  skb_put(skb,
L
Linus Torvalds 已提交
2023 2024 2025 2026 2027 2028 2029 2030 2031
						     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 */
2032
	lifetime = (struct sadb_lifetime *)  skb_put(skb,
L
Linus Torvalds 已提交
2033 2034 2035 2036 2037 2038 2039 2040 2041
						     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 */
2042
	lifetime = (struct sadb_lifetime *)  skb_put(skb,
L
Linus Torvalds 已提交
2043 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
						     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;
2070
		int mode;
L
Linus Torvalds 已提交
2071 2072

		req_size = sizeof(struct sadb_x_ipsecrequest);
2073 2074 2075 2076
		if (t->mode == XFRM_MODE_TUNNEL) {
			socklen = pfkey_sockaddr_len(t->encap_family);
			req_size += socklen * 2;
		} else {
L
Linus Torvalds 已提交
2077
			size -= 2*socklen;
2078
		}
L
Linus Torvalds 已提交
2079 2080 2081 2082 2083
		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;
2084 2085
		if ((mode = pfkey_mode_from_xfrm(t->mode)) < 0)
			return -EINVAL;
2086
		rq->sadb_x_ipsecrequest_mode = mode;
L
Linus Torvalds 已提交
2087 2088 2089 2090 2091 2092
		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;
2093

2094
		if (t->mode == XFRM_MODE_TUNNEL) {
2095 2096 2097 2098 2099 2100 2101
			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
2102 2103
		}
	}
2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118

	/* 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
2119 2120
	hdr->sadb_msg_len = size / sizeof(uint64_t);
	hdr->sadb_msg_reserved = atomic_read(&xp->refcnt);
2121 2122

	return 0;
L
Linus Torvalds 已提交
2123 2124
}

2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135
static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
{
	struct sk_buff *out_skb;
	struct sadb_msg *out_hdr;
	int err;

	out_skb = pfkey_xfrm_policy2msg_prep(xp);
	if (IS_ERR(out_skb)) {
		err = PTR_ERR(out_skb);
		goto out;
	}
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 2155
out:
	return 0;

}

L
Linus Torvalds 已提交
2156 2157
static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
2158
	struct net *net = sock_net(sk);
2159
	int err = 0;
L
Linus Torvalds 已提交
2160 2161 2162 2163
	struct sadb_lifetime *lifetime;
	struct sadb_address *sa;
	struct sadb_x_policy *pol;
	struct xfrm_policy *xp;
2164
	struct km_event c;
2165
	struct sadb_x_sec_ctx *sec_ctx;
L
Linus Torvalds 已提交
2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177

	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
2178
	xp = xfrm_policy_alloc(net, GFP_KERNEL);
L
Linus Torvalds 已提交
2179 2180 2181 2182 2183 2184 2185
	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;

2186
	sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
L
Linus Torvalds 已提交
2187 2188 2189 2190 2191 2192 2193 2194 2195 2196
	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)
2197
		xp->selector.sport_mask = htons(0xffff);
L
Linus Torvalds 已提交
2198

2199
	sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
L
Linus Torvalds 已提交
2200 2201 2202 2203 2204 2205 2206 2207 2208 2209
	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)
2210
		xp->selector.dport_mask = htons(0xffff);
L
Linus Torvalds 已提交
2211

2212 2213 2214 2215 2216 2217 2218 2219 2220
	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;
		}

2221
		err = security_xfrm_policy_alloc(&xp->security, uctx);
2222 2223 2224 2225 2226 2227
		kfree(uctx);

		if (err)
			goto out;
	}

L
Linus Torvalds 已提交
2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250
	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);
2251

J
Joy Latten 已提交
2252
	xfrm_audit_policy_add(xp, err ? 0 : 1,
2253 2254
			      audit_get_loginuid(current),
			      audit_get_sessionid(current), 0);
J
Joy Latten 已提交
2255

2256 2257
	if (err)
		goto out;
L
Linus Torvalds 已提交
2258

2259
	if (hdr->sadb_msg_type == SADB_X_SPDUPDATE)
2260
		c.event = XFRM_MSG_UPDPOLICY;
2261
	else
2262
		c.event = XFRM_MSG_NEWPOLICY;
L
Linus Torvalds 已提交
2263

2264 2265
	c.seq = hdr->sadb_msg_seq;
	c.pid = hdr->sadb_msg_pid;
L
Linus Torvalds 已提交
2266

2267 2268
	km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
	xfrm_pol_put(xp);
L
Linus Torvalds 已提交
2269 2270 2271
	return 0;

out:
H
Herbert Xu 已提交
2272
	xp->walk.dead = 1;
2273
	xfrm_policy_destroy(xp);
L
Linus Torvalds 已提交
2274 2275 2276 2277 2278
	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
2279
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
2280 2281 2282
	int err;
	struct sadb_address *sa;
	struct sadb_x_policy *pol;
2283
	struct xfrm_policy *xp;
L
Linus Torvalds 已提交
2284
	struct xfrm_selector sel;
2285
	struct km_event c;
2286
	struct sadb_x_sec_ctx *sec_ctx;
2287
	struct xfrm_sec_ctx *pol_ctx = NULL;
L
Linus Torvalds 已提交
2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299

	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));

2300
	sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
L
Linus Torvalds 已提交
2301 2302 2303 2304 2305
	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)
2306
		sel.sport_mask = htons(0xffff);
L
Linus Torvalds 已提交
2307

2308
	sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1],
L
Linus Torvalds 已提交
2309 2310 2311 2312 2313
	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)
2314
		sel.dport_mask = htons(0xffff);
L
Linus Torvalds 已提交
2315

2316 2317 2318 2319 2320 2321 2322
	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;

2323
		err = security_xfrm_policy_alloc(&pol_ctx, uctx);
2324 2325 2326
		kfree(uctx);
		if (err)
			return err;
2327
	}
J
Joy Latten 已提交
2328

2329
	xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2330 2331 2332
				   pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
				   1, &err);
	security_xfrm_policy_free(pol_ctx);
L
Linus Torvalds 已提交
2333 2334 2335
	if (xp == NULL)
		return -ENOENT;

J
Joy Latten 已提交
2336
	xfrm_audit_policy_delete(xp, err ? 0 : 1,
2337 2338
				 audit_get_loginuid(current),
				 audit_get_sessionid(current), 0);
2339 2340

	if (err)
C
Catherine Zhang 已提交
2341
		goto out;
2342

2343 2344
	c.seq = hdr->sadb_msg_seq;
	c.pid = hdr->sadb_msg_pid;
2345
	c.data.byid = 0;
2346
	c.event = XFRM_MSG_DELPOLICY;
2347 2348
	km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);

C
Catherine Zhang 已提交
2349
out:
2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360
	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
2361 2362 2363 2364 2365
	out_skb = pfkey_xfrm_policy2msg_prep(xp);
	if (IS_ERR(out_skb)) {
		err =  PTR_ERR(out_skb);
		goto out;
	}
2366 2367 2368
	err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
	if (err < 0)
		goto out;
L
Linus Torvalds 已提交
2369 2370 2371

	out_hdr = (struct sadb_msg *) out_skb->data;
	out_hdr->sadb_msg_version = hdr->sadb_msg_version;
2372
	out_hdr->sadb_msg_type = hdr->sadb_msg_type;
L
Linus Torvalds 已提交
2373 2374 2375 2376
	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
2377
	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
L
Linus Torvalds 已提交
2378 2379 2380 2381 2382 2383
	err = 0;

out:
	return err;
}

2384 2385 2386
#ifdef CONFIG_NET_KEY_MIGRATE
static int pfkey_sockaddr_pair_size(sa_family_t family)
{
2387
	return PFKEY_ALIGN8(pfkey_sockaddr_len(family) * 2);
2388 2389
}

2390
static int parse_sockaddr_pair(struct sockaddr *sa, int ext_len,
2391 2392 2393
			       xfrm_address_t *saddr, xfrm_address_t *daddr,
			       u16 *family)
{
2394 2395
	int af, socklen;

2396
	if (ext_len < pfkey_sockaddr_pair_size(sa->sa_family))
2397 2398
		return -EINVAL;

2399
	af = pfkey_sockaddr_extract(sa, saddr);
2400 2401 2402 2403
	if (!af)
		return -EINVAL;

	socklen = pfkey_sockaddr_len(af);
2404
	if (pfkey_sockaddr_extract((struct sockaddr *) (((u8 *)sa) + socklen),
2405
				   daddr) != af)
2406 2407
		return -EINVAL;

2408
	*family = af;
2409 2410 2411 2412 2413 2414 2415 2416
	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;
2417
	int mode;
2418 2419 2420 2421 2422 2423

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

	/* old endoints */
2424 2425 2426
	err = parse_sockaddr_pair((struct sockaddr *)(rq1 + 1),
				  rq1->sadb_x_ipsecrequest_len,
				  &m->old_saddr, &m->old_daddr,
2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438
				  &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 */
2439 2440 2441
	err = parse_sockaddr_pair((struct sockaddr *)(rq2 + 1),
				  rq2->sadb_x_ipsecrequest_len,
				  &m->new_saddr, &m->new_daddr,
2442 2443 2444 2445 2446 2447 2448 2449 2450 2451
				  &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;
2452 2453 2454
	if ((mode = pfkey_mode_to_xfrm(rq1->sadb_x_ipsecrequest_mode)) < 0)
		return -EINVAL;
	m->mode = mode;
2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466
	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;
2467
	struct sadb_x_kmaddress *kma;
2468 2469 2470 2471
	struct sadb_x_policy *pol;
	struct sadb_x_ipsecrequest *rq;
	struct xfrm_selector sel;
	struct xfrm_migrate m[XFRM_MAX_DEPTH];
2472
	struct xfrm_kmaddress k;
2473 2474

	if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC - 1],
2475
				     ext_hdrs[SADB_EXT_ADDRESS_DST - 1]) ||
2476 2477 2478 2479 2480
	    !ext_hdrs[SADB_X_EXT_POLICY - 1]) {
		err = -EINVAL;
		goto out;
	}

2481
	kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
2482 2483 2484 2485 2486 2487 2488
	pol = ext_hdrs[SADB_X_EXT_POLICY - 1];

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

2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500
	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;
		}
	}

2501 2502 2503 2504 2505 2506 2507 2508 2509 2510
	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
2511
		sel.sport_mask = htons(0xffff);
2512 2513 2514 2515 2516 2517 2518 2519

	/* 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
2520
		sel.dport_mask = htons(0xffff);
2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544

	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;
	}

2545 2546
	return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
			    kma ? &k : NULL);
2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559

 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
2560 2561
static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
2562
	struct net *net = sock_net(sk);
2563
	unsigned int dir;
2564
	int err = 0, delete;
L
Linus Torvalds 已提交
2565 2566
	struct sadb_x_policy *pol;
	struct xfrm_policy *xp;
2567
	struct km_event c;
L
Linus Torvalds 已提交
2568 2569 2570 2571

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

2572 2573 2574 2575
	dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
	if (dir >= XFRM_POLICY_MAX)
		return -EINVAL;

2576
	delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
2577
	xp = xfrm_policy_byid(net, DUMMY_MARK, XFRM_POLICY_TYPE_MAIN,
2578
			      dir, pol->sadb_x_policy_id, delete, &err);
L
Linus Torvalds 已提交
2579 2580 2581
	if (xp == NULL)
		return -ENOENT;

2582
	if (delete) {
J
Joy Latten 已提交
2583
		xfrm_audit_policy_delete(xp, err ? 0 : 1,
2584 2585
				audit_get_loginuid(current),
				audit_get_sessionid(current), 0);
L
Linus Torvalds 已提交
2586

2587 2588 2589 2590
		if (err)
			goto out;
		c.seq = hdr->sadb_msg_seq;
		c.pid = hdr->sadb_msg_pid;
2591
		c.data.byid = 1;
2592
		c.event = XFRM_MSG_DELPOLICY;
2593
		km_policy_notify(xp, dir, &c);
2594
	} else {
2595
		err = key_pol_get_resp(sk, xp, hdr, dir);
L
Linus Torvalds 已提交
2596 2597
	}

2598
out:
L
Linus Torvalds 已提交
2599 2600 2601 2602 2603 2604
	xfrm_pol_put(xp);
	return err;
}

static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
{
2605
	struct pfkey_sock *pfk = ptr;
L
Linus Torvalds 已提交
2606 2607
	struct sk_buff *out_skb;
	struct sadb_msg *out_hdr;
2608
	int err;
L
Linus Torvalds 已提交
2609

2610 2611 2612
	if (!pfkey_can_dump(&pfk->sk))
		return -ENOBUFS;

L
Linus Torvalds 已提交
2613 2614 2615 2616
	out_skb = pfkey_xfrm_policy2msg_prep(xp);
	if (IS_ERR(out_skb))
		return PTR_ERR(out_skb);

2617 2618 2619
	err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
	if (err < 0)
		return err;
L
Linus Torvalds 已提交
2620 2621

	out_hdr = (struct sadb_msg *) out_skb->data;
2622
	out_hdr->sadb_msg_version = pfk->dump.msg_version;
L
Linus Torvalds 已提交
2623 2624 2625
	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
2626
	out_hdr->sadb_msg_seq = count + 1;
2627
	out_hdr->sadb_msg_pid = pfk->dump.msg_pid;
H
Herbert Xu 已提交
2628 2629 2630

	if (pfk->dump.skb)
		pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
A
Alexey Dobriyan 已提交
2631
				&pfk->sk, sock_net(&pfk->sk));
H
Herbert Xu 已提交
2632 2633
	pfk->dump.skb = out_skb;

L
Linus Torvalds 已提交
2634 2635 2636
	return 0;
}

2637 2638
static int pfkey_dump_sp(struct pfkey_sock *pfk)
{
A
Alexey Dobriyan 已提交
2639 2640
	struct net *net = sock_net(&pfk->sk);
	return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
2641 2642 2643 2644 2645 2646 2647
}

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

L
Linus Torvalds 已提交
2648 2649
static int pfkey_spddump(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
2650
	struct pfkey_sock *pfk = pfkey_sk(sk);
2651

2652 2653
	if (pfk->dump.dump != NULL)
		return -EBUSY;
L
Linus Torvalds 已提交
2654

2655 2656 2657 2658 2659 2660 2661
	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
2662 2663
}

2664
static int key_notify_policy_flush(struct km_event *c)
L
Linus Torvalds 已提交
2665 2666
{
	struct sk_buff *skb_out;
2667
	struct sadb_msg *hdr;
L
Linus Torvalds 已提交
2668

2669
	skb_out = alloc_skb(sizeof(struct sadb_msg) + 16, GFP_ATOMIC);
L
Linus Torvalds 已提交
2670 2671
	if (!skb_out)
		return -ENOBUFS;
2672
	hdr = (struct sadb_msg *) skb_put(skb_out, sizeof(struct sadb_msg));
J
Jerome Borsboom 已提交
2673
	hdr->sadb_msg_type = SADB_X_SPDFLUSH;
2674 2675 2676 2677 2678
	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
2679
	pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
2680
	return 0;
L
Linus Torvalds 已提交
2681

2682 2683 2684 2685
}

static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
A
Alexey Dobriyan 已提交
2686
	struct net *net = sock_net(sk);
2687
	struct km_event c;
J
Joy Latten 已提交
2688
	struct xfrm_audit audit_info;
2689
	int err, err2;
L
Linus Torvalds 已提交
2690

2691
	audit_info.loginuid = audit_get_loginuid(current);
2692
	audit_info.sessionid = audit_get_sessionid(current);
J
Joy Latten 已提交
2693
	audit_info.secid = 0;
A
Alexey Dobriyan 已提交
2694
	err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info);
2695
	err2 = unicast_flush_resp(sk, hdr);
2696 2697 2698 2699 2700
	if (err || err2) {
		if (err == -ESRCH) /* empty table - old silent behavior */
			return 0;
		return err;
	}
2701

2702
	c.data.type = XFRM_POLICY_TYPE_MAIN;
2703
	c.event = XFRM_MSG_FLUSHPOLICY;
2704 2705
	c.pid = hdr->sadb_msg_pid;
	c.seq = hdr->sadb_msg_seq;
A
Alexey Dobriyan 已提交
2706
	c.net = net;
2707
	km_policy_notify(NULL, 0, &c);
L
Linus Torvalds 已提交
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 2736

	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,
2737
	[SADB_X_MIGRATE]	= pfkey_migrate,
L
Linus Torvalds 已提交
2738 2739 2740 2741 2742 2743 2744 2745
};

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
2746
			BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
L
Linus Torvalds 已提交
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 2786

	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)
{
2787 2788 2789 2790 2791 2792
	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
2793 2794 2795 2796
}

static inline int ealg_tmpl_set(struct xfrm_tmpl *t, struct xfrm_algo_desc *d)
{
2797 2798 2799 2800 2801 2802
	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
2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826
}

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;
2827

L
Linus Torvalds 已提交
2828 2829
		if (!(ealg_tmpl_set(t, ealg) && ealg->available))
			continue;
2830

L
Linus Torvalds 已提交
2831 2832 2833 2834
		for (k = 1; ; k++) {
			struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);
			if (!aalg)
				break;
2835

L
Linus Torvalds 已提交
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 2889
			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;
2890

L
Linus Torvalds 已提交
2891 2892
		if (!(ealg_tmpl_set(t, ealg) && ealg->available))
			continue;
2893

L
Linus Torvalds 已提交
2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917
		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;
		}
	}
}

2918 2919 2920 2921 2922 2923
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
2924 2925 2926
{
	struct sk_buff *out_skb;
	struct sadb_msg *out_hdr;
2927 2928 2929
	int hard;
	int hsc;

2930
	hard = c->data.hard;
2931 2932 2933 2934
	if (hard)
		hsc = 2;
	else
		hsc = 1;
L
Linus Torvalds 已提交
2935

2936
	out_skb = pfkey_xfrm_state2msg_expire(x, hsc);
L
Linus Torvalds 已提交
2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948
	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
2949
	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
L
Linus Torvalds 已提交
2950 2951 2952
	return 0;
}

2953 2954
static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
{
A
Alexey Dobriyan 已提交
2955
	struct net *net = x ? xs_net(x) : c->net;
A
Alexey Dobriyan 已提交
2956 2957 2958
	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);

	if (atomic_read(&net_pfkey->socks_nr) == 0)
2959 2960
		return 0;

2961
	switch (c->event) {
2962
	case XFRM_MSG_EXPIRE:
2963
		return key_notify_sa_expire(x, c);
2964 2965 2966
	case XFRM_MSG_DELSA:
	case XFRM_MSG_NEWSA:
	case XFRM_MSG_UPDSA:
2967
		return key_notify_sa(x, c);
2968
	case XFRM_MSG_FLUSHSA:
2969
		return key_notify_sa_flush(c);
J
Jamal Hadi Salim 已提交
2970 2971
	case XFRM_MSG_NEWAE: /* not yet supported */
		break;
2972 2973 2974 2975 2976 2977 2978 2979 2980 2981
	default:
		printk("pfkey: Unknown SA event %d\n", c->event);
		break;
	}

	return 0;
}

static int pfkey_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
{
2982 2983 2984
	if (xp && xp->type != XFRM_POLICY_TYPE_MAIN)
		return 0;

2985
	switch (c->event) {
2986
	case XFRM_MSG_POLEXPIRE:
2987
		return key_notify_policy_expire(xp, c);
2988 2989 2990
	case XFRM_MSG_DELPOLICY:
	case XFRM_MSG_NEWPOLICY:
	case XFRM_MSG_UPDPOLICY:
2991
		return key_notify_policy(xp, dir, c);
2992
	case XFRM_MSG_FLUSHPOLICY:
2993 2994
		if (c->data.type != XFRM_POLICY_TYPE_MAIN)
			break;
2995 2996 2997 2998 2999 3000 3001 3002 3003
		return key_notify_policy_flush(c);
	default:
		printk("pfkey: Unknown policy event %d\n", c->event);
		break;
	}

	return 0;
}

L
Linus Torvalds 已提交
3004 3005 3006
static u32 get_acqseq(void)
{
	u32 res;
3007
	static atomic_t acqseq;
L
Linus Torvalds 已提交
3008

3009 3010 3011
	do {
		res = atomic_inc_return(&acqseq);
	} while (!res);
L
Linus Torvalds 已提交
3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022
	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;
3023 3024 3025
	struct sadb_x_sec_ctx *sec_ctx;
	struct xfrm_sec_ctx *xfrm_ctx;
	int ctx_size = 0;
3026

L
Linus Torvalds 已提交
3027 3028 3029 3030 3031 3032 3033 3034
	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);
3035

L
Linus Torvalds 已提交
3036 3037 3038 3039 3040
	if (x->id.proto == IPPROTO_AH)
		size += count_ah_combs(t);
	else if (x->id.proto == IPPROTO_ESP)
		size += count_esp_combs(t);

3041 3042 3043 3044 3045
	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
3046 3047 3048
	skb =  alloc_skb(size + 16, GFP_ATOMIC);
	if (skb == NULL)
		return -ENOMEM;
3049

L
Linus Torvalds 已提交
3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060
	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 */
3061
	addr = (struct sadb_address*) skb_put(skb,
L
Linus Torvalds 已提交
3062
					      sizeof(struct sadb_address)+sockaddr_size);
3063
	addr->sadb_address_len =
L
Linus Torvalds 已提交
3064 3065 3066 3067 3068
		(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;
3069 3070 3071 3072 3073
	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
3074
		BUG();
3075

L
Linus Torvalds 已提交
3076
	/* dst address */
3077
	addr = (struct sadb_address*) skb_put(skb,
L
Linus Torvalds 已提交
3078 3079 3080 3081 3082 3083 3084
					      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;
3085 3086 3087 3088 3089
	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
3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104
		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);

3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118
	/* 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
3119
	return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
L
Linus Torvalds 已提交
3120 3121
}

3122
static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
3123
						u8 *data, int len, int *dir)
L
Linus Torvalds 已提交
3124
{
A
Alexey Dobriyan 已提交
3125
	struct net *net = sock_net(sk);
L
Linus Torvalds 已提交
3126 3127
	struct xfrm_policy *xp;
	struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
3128
	struct sadb_x_sec_ctx *sec_ctx;
L
Linus Torvalds 已提交
3129

3130
	switch (sk->sk_family) {
L
Linus Torvalds 已提交
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 3157
	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
3158
	xp = xfrm_policy_alloc(net, GFP_ATOMIC);
L
Linus Torvalds 已提交
3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170
	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;
3171
	xp->family = sk->sk_family;
L
Linus Torvalds 已提交
3172 3173 3174 3175 3176 3177

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

3178 3179 3180 3181 3182 3183 3184 3185 3186
	/* 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 +
3187 3188
		    sec_ctx->sadb_x_sec_len) {
			*dir = -EINVAL;
3189
			goto out;
3190
		}
3191 3192 3193
		if ((*dir = verify_sec_ctx_len(p)))
			goto out;
		uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx);
3194
		*dir = security_xfrm_policy_alloc(&xp->security, uctx);
3195 3196 3197 3198 3199 3200
		kfree(uctx);

		if (*dir)
			goto out;
	}

L
Linus Torvalds 已提交
3201 3202 3203 3204
	*dir = pol->sadb_x_policy_dir-1;
	return xp;

out:
3205
	xp->walk.dead = 1;
3206
	xfrm_policy_destroy(xp);
L
Linus Torvalds 已提交
3207 3208 3209
	return NULL;
}

A
Al Viro 已提交
3210
static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
L
Linus Torvalds 已提交
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 3238
{
	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)
	 */
3239

L
Linus Torvalds 已提交
3240 3241 3242 3243 3244
	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);
3245

L
Linus Torvalds 已提交
3246 3247 3248
	skb =  alloc_skb(size + 16, GFP_ATOMIC);
	if (skb == NULL)
		return -ENOMEM;
3249

L
Linus Torvalds 已提交
3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273
	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);
3274
	addr->sadb_address_len =
L
Linus Torvalds 已提交
3275 3276 3277 3278 3279
		(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;
3280 3281 3282 3283 3284
	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
3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296
		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);
3297
	addr->sadb_address_len =
L
Linus Torvalds 已提交
3298 3299 3300 3301 3302
		(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;
3303 3304 3305 3306 3307
	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
3308 3309 3310 3311 3312 3313 3314 3315 3316
		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
3317
	return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
L
Linus Torvalds 已提交
3318 3319
}

3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332
#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:
3333 3334 3335 3336
		addr->sadb_address_prefixlen = sel->prefixlen_s;
		pfkey_sockaddr_fill(&sel->saddr, 0,
				    (struct sockaddr *)(addr + 1),
				    sel->family);
3337 3338
		break;
	case SADB_EXT_ADDRESS_DST:
3339 3340 3341 3342
		addr->sadb_address_prefixlen = sel->prefixlen_d;
		pfkey_sockaddr_fill(&sel->daddr, 0,
				    (struct sockaddr *)(addr + 1),
				    sel->family);
3343 3344 3345 3346 3347 3348 3349 3350
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

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 3376

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;
}

3377 3378 3379 3380 3381 3382
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;
3383 3384
	u8 *sa;
	int socklen = pfkey_sockaddr_len(family);
3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397
	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;

3398 3399 3400
	sa = (u8 *) (rq + 1);
	if (!pfkey_sockaddr_fill(src, 0, (struct sockaddr *)sa, family) ||
	    !pfkey_sockaddr_fill(dst, 0, (struct sockaddr *)(sa + socklen), family))
3401 3402 3403 3404 3405 3406 3407 3408
		return -EINVAL;

	return 0;
}
#endif

#ifdef CONFIG_NET_KEY_MIGRATE
static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3409 3410
			      struct xfrm_migrate *m, int num_bundles,
			      struct xfrm_kmaddress *k)
3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426
{
	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;

3427 3428 3429 3430 3431 3432
	if (k != NULL) {
		/* addresses for KM */
		size += PFKEY_ALIGN8(sizeof(struct sadb_x_kmaddress) +
				     pfkey_sockaddr_pair_size(k->family));
	}

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 3468
	/* 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;

3469 3470 3471 3472
	/* Addresses to be used by KM for negotiation, if ext is available */
	if (k != NULL && (set_sadb_kmaddress(skb, k) < 0))
		return -EINVAL;

3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489
	/* 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 */
3490 3491
		int mode = pfkey_mode_from_xfrm(mp->mode);
		if (mode < 0)
3492
			goto err;
3493
		if (set_ipsecrequest(skb, mp->proto, mode,
3494 3495
				     (mp->reqid ?  IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
				     mp->reqid, mp->old_family,
3496 3497
				     &mp->old_saddr, &mp->old_daddr) < 0)
			goto err;
3498 3499

		/* new ipsecrequest */
3500
		if (set_ipsecrequest(skb, mp->proto, mode,
3501 3502
				     (mp->reqid ? IPSEC_LEVEL_UNIQUE : IPSEC_LEVEL_REQUIRE),
				     mp->reqid, mp->new_family,
3503 3504
				     &mp->new_saddr, &mp->new_daddr) < 0)
			goto err;
3505 3506 3507
	}

	/* broadcast migrate message to sockets */
A
Alexey Dobriyan 已提交
3508
	pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
3509 3510

	return 0;
3511 3512 3513 3514

err:
	kfree_skb(skb);
	return -EINVAL;
3515 3516 3517
}
#else
static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
3518 3519
			      struct xfrm_migrate *m, int num_bundles,
			      struct xfrm_kmaddress *k)
3520 3521 3522 3523 3524
{
	return -ENOPROTOOPT;
}
#endif

L
Linus Torvalds 已提交
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 3553
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
3554
	mutex_lock(&xfrm_cfg_mutex);
L
Linus Torvalds 已提交
3555
	err = pfkey_process(sk, skb, hdr);
A
Arjan van de Ven 已提交
3556
	mutex_unlock(&xfrm_cfg_mutex);
L
Linus Torvalds 已提交
3557 3558 3559 3560

out:
	if (err && hdr && pfkey_error(hdr, err, sk) == 0)
		err = 0;
3561
	kfree_skb(skb);
L
Linus Torvalds 已提交
3562 3563 3564 3565 3566 3567 3568 3569 3570

	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;
3571
	struct pfkey_sock *pfk = pfkey_sk(sk);
L
Linus Torvalds 已提交
3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589
	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;
	}

3590
	skb_reset_transport_header(skb);
L
Linus Torvalds 已提交
3591 3592 3593 3594
	err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
	if (err)
		goto out_free;

3595
	sock_recv_ts_and_drops(msg, sk, skb);
L
Linus Torvalds 已提交
3596 3597 3598

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

3599 3600 3601 3602
	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
3603 3604 3605 3606 3607 3608
out_free:
	skb_free_datagram(sk, skb);
out:
	return err;
}

3609
static const struct proto_ops pfkey_ops = {
L
Linus Torvalds 已提交
3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632
	.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,
};

3633
static const struct net_proto_family pfkey_family_ops = {
L
Linus Torvalds 已提交
3634 3635 3636 3637 3638 3639
	.family	=	PF_KEY,
	.create	=	pfkey_create,
	.owner	=	THIS_MODULE,
};

#ifdef CONFIG_PROC_FS
3640
static int pfkey_seq_show(struct seq_file *f, void *v)
L
Linus Torvalds 已提交
3641
{
3642
	struct sock *s = sk_entry(v);
L
Linus Torvalds 已提交
3643

3644 3645 3646 3647
	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
3648 3649
			       s,
			       atomic_read(&s->sk_refcnt),
3650 3651
			       sk_rmem_alloc_get(s),
			       sk_wmem_alloc_get(s),
L
Linus Torvalds 已提交
3652 3653 3654
			       sock_i_uid(s),
			       sock_i_ino(s)
			       );
3655 3656 3657 3658 3659
	return 0;
}

static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos)
{
3660
	struct net *net = seq_file_net(f);
A
Alexey Dobriyan 已提交
3661
	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
L
Linus Torvalds 已提交
3662

S
stephen hemminger 已提交
3663 3664
	rcu_read_lock();
	return seq_hlist_start_head_rcu(&net_pfkey->table, *ppos);
3665 3666 3667 3668
}

static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos)
{
3669
	struct net *net = seq_file_net(f);
A
Alexey Dobriyan 已提交
3670 3671
	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);

S
stephen hemminger 已提交
3672
	return seq_hlist_next_rcu(v, &net_pfkey->table, ppos);
3673
}
L
Linus Torvalds 已提交
3674

3675 3676
static void pfkey_seq_stop(struct seq_file *f, void *v)
{
S
stephen hemminger 已提交
3677
	rcu_read_unlock();
3678
}
L
Linus Torvalds 已提交
3679

3680
static const struct seq_operations pfkey_seq_ops = {
3681 3682 3683 3684 3685
	.start	= pfkey_seq_start,
	.next	= pfkey_seq_next,
	.stop	= pfkey_seq_stop,
	.show	= pfkey_seq_show,
};
L
Linus Torvalds 已提交
3686

3687 3688
static int pfkey_seq_open(struct inode *inode, struct file *file)
{
3689 3690
	return seq_open_net(inode, file, &pfkey_seq_ops,
			    sizeof(struct seq_net_private));
L
Linus Torvalds 已提交
3691
}
3692

3693
static const struct file_operations pfkey_proc_ops = {
3694 3695 3696
	.open	 = pfkey_seq_open,
	.read	 = seq_read,
	.llseek	 = seq_lseek,
3697
	.release = seq_release_net,
3698 3699
};

3700
static int __net_init pfkey_init_proc(struct net *net)
3701
{
3702 3703
	struct proc_dir_entry *e;

3704
	e = proc_net_fops_create(net, "pfkey", 0, &pfkey_proc_ops);
3705
	if (e == NULL)
3706
		return -ENOMEM;
3707 3708

	return 0;
3709 3710
}

3711
static void __net_exit pfkey_exit_proc(struct net *net)
3712
{
3713
	proc_net_remove(net, "pfkey");
3714 3715
}
#else
3716
static inline int pfkey_init_proc(struct net *net)
3717 3718 3719 3720
{
	return 0;
}

3721
static inline void pfkey_exit_proc(struct net *net)
3722 3723
{
}
L
Linus Torvalds 已提交
3724 3725 3726 3727 3728 3729 3730 3731 3732
#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,
3733
	.notify_policy	= pfkey_send_policy_notify,
3734
	.migrate	= pfkey_send_migrate,
L
Linus Torvalds 已提交
3735 3736
};

A
Alexey Dobriyan 已提交
3737 3738
static int __net_init pfkey_net_init(struct net *net)
{
3739
	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
A
Alexey Dobriyan 已提交
3740 3741 3742 3743
	int rv;

	INIT_HLIST_HEAD(&net_pfkey->table);
	atomic_set(&net_pfkey->socks_nr, 0);
3744

3745
	rv = pfkey_init_proc(net);
A
Alexey Dobriyan 已提交
3746 3747 3748 3749 3750 3751 3752 3753

	return rv;
}

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

3754
	pfkey_exit_proc(net);
A
Alexey Dobriyan 已提交
3755 3756 3757 3758 3759 3760
	BUG_ON(!hlist_empty(&net_pfkey->table));
}

static struct pernet_operations pfkey_net_ops = {
	.init = pfkey_net_init,
	.exit = pfkey_net_exit,
3761 3762
	.id   = &pfkey_net_id,
	.size = sizeof(struct netns_pfkey),
A
Alexey Dobriyan 已提交
3763 3764
};

L
Linus Torvalds 已提交
3765 3766 3767 3768
static void __exit ipsec_pfkey_exit(void)
{
	xfrm_unregister_km(&pfkeyv2_mgr);
	sock_unregister(PF_KEY);
3769
	unregister_pernet_subsys(&pfkey_net_ops);
L
Linus Torvalds 已提交
3770 3771 3772 3773 3774 3775 3776 3777 3778 3779
	proto_unregister(&key_proto);
}

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

	if (err != 0)
		goto out;

3780
	err = register_pernet_subsys(&pfkey_net_ops);
L
Linus Torvalds 已提交
3781 3782
	if (err != 0)
		goto out_unregister_key_proto;
3783 3784 3785
	err = sock_register(&pfkey_family_ops);
	if (err != 0)
		goto out_unregister_pernet;
L
Linus Torvalds 已提交
3786 3787
	err = xfrm_register_km(&pfkeyv2_mgr);
	if (err != 0)
3788
		goto out_sock_unregister;
L
Linus Torvalds 已提交
3789 3790
out:
	return err;
3791

L
Linus Torvalds 已提交
3792 3793
out_sock_unregister:
	sock_unregister(PF_KEY);
3794 3795
out_unregister_pernet:
	unregister_pernet_subsys(&pfkey_net_ops);
L
Linus Torvalds 已提交
3796 3797 3798 3799 3800 3801 3802 3803 3804
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);