Commit message: xfrm: clean up xfrm protocol checks

In commit 6a53b7593233 ("xfrm: check id proto in validate_tmpl()")
I introduced a check for xfrm protocol, but according to Herbert
IPSEC_PROTO_ANY should only be used as a wildcard for lookup, so
it should be removed from validate_tmpl().

And, IPSEC_PROTO_ANY is expected to only match 3 IPSec-specific
protocols, this is why xfrm_state_flush() could still miss
IPPROTO_ROUTING, which leads that those entries are left in
net->xfrm.state_all before exit net. Fix this by replacing
IPSEC_PROTO_ANY with zero.

This patch also extracts the check from validate_tmpl() to
xfrm_id_proto_valid() and uses it in parse_ipsecrequest().
With this, no other protocols should be added into xfrm.

Fixes: 6a53b7593233 ("xfrm: check id proto in validate_tmpl()")
Reported-by: syzbot+0bf0519d6e0de15914fe@syzkaller.appspotmail.com
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
CVE: CVE-2019-25045
CWE: CWE-416
Vulnerability description: An issue was discovered in the Linux kernel before 5.0.19. The XFRM subsystem has a use-after-free, related to an xfrm_state_fini panic, aka CID-dbb2483b2a46.

Project: linux
File: xfrm_state.c

int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
	       const struct xfrm_migrate *m, int num_migrate,
	       const struct xfrm_kmaddress *k,
	       const struct xfrm_encap_tmpl *encap)
{
	int err = -EINVAL;
	int ret;
	struct xfrm_mgr *km;

	rcu_read_lock();
	list_for_each_entry_rcu(km, &xfrm_km_list, list) {
		if (km->migrate) {
			ret = km->migrate(sel, dir, type, m, num_migrate, k,
					  encap);
			if (!ret)
				err = ret;
		}
	}
	rcu_read_unlock();
	return err;
}

Project: linux
File: xfrm_user.c

static int build_report(struct sk_buff *skb, u8 proto,
			struct xfrm_selector *sel, xfrm_address_t *addr)
{
	struct xfrm_user_report *ur;
	struct nlmsghdr *nlh;

	nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
	if (nlh == NULL)
		return -EMSGSIZE;

	ur = nlmsg_data(nlh);
	ur->proto = proto;
	memcpy(&ur->sel, sel, sizeof(ur->sel));

	if (addr) {
		int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
		if (err) {
			nlmsg_cancel(skb, nlh);
			return err;
		}
	}
	nlmsg_end(skb, nlh);
	return 0;
}

Project: linux
File: xfrm_user.c

static inline unsigned int xfrm_report_msgsize(void)
{
	return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
}

Project: linux
File: xfrm_state.c

void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
			  struct xfrm_address_filter *filter)
{
	INIT_LIST_HEAD(&walk->all);
	walk->proto = proto;
	walk->state = XFRM_STATE_DEAD;
	walk->seq = 0;
	walk->filter = filter;
}

Project: linux
File: xfrm_user.c

static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
		struct nlattr **attrs)
{
	struct net *net = sock_net(skb->sk);
	struct xfrm_policy *xp;
	struct xfrm_userpolicy_id *p;
	u8 type = XFRM_POLICY_TYPE_MAIN;
	int err;
	struct km_event c;
	int delete;
	struct xfrm_mark m;
	u32 mark = xfrm_mark_get(attrs, &m);
	u32 if_id = 0;

	p = nlmsg_data(nlh);
	delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;

	err = copy_from_user_policy_type(&type, attrs);
	if (err)
		return err;

	err = verify_policy_dir(p->dir);
	if (err)
		return err;

	if (attrs[XFRMA_IF_ID])
		if_id = nla_get_u32(attrs[XFRMA_IF_ID]);

	if (p->index)
		xp = xfrm_policy_byid(net, mark, if_id, type, p->dir, p->index, delete, &err);
	else {
		struct nlattr *rt = attrs[XFRMA_SEC_CTX];
		struct xfrm_sec_ctx *ctx;

		err = verify_sec_ctx_len(attrs);
		if (err)
			return err;

		ctx = NULL;
		if (rt) {
			struct xfrm_user_sec_ctx *uctx = nla_data(rt);

			err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
			if (err)
				return err;
		}
		xp = xfrm_policy_bysel_ctx(net, mark, if_id, type, p->dir, &p->sel,
					   ctx, delete, &err);
		security_xfrm_policy_free(ctx);
	}
	if (xp == NULL)
		return -ENOENT;

	if (!delete) {
		struct sk_buff *resp_skb;

		resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
		if (IS_ERR(resp_skb)) {
			err = PTR_ERR(resp_skb);
		} else {
			err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
					    NETLINK_CB(skb).portid);
		}
	} else {
		xfrm_audit_policy_delete(xp, err ? 0 : 1, true);

		if (err != 0)
			goto out;

		c.data.byid = p->index;
		c.event = nlh->nlmsg_type;
		c.seq = nlh->nlmsg_seq;
		c.portid = nlh->nlmsg_pid;
		km_policy_notify(xp, p->dir, &c);
	}

out:
	xfrm_pol_put(xp);
	return err;
}

Project: linux
File: xfrm_user.c

static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
		struct nlattr **attrs)
{
	struct net *net = sock_net(skb->sk);
	struct sk_buff *r_skb;
	u32 *flags = nlmsg_data(nlh);
	u32 sportid = NETLINK_CB(skb).portid;
	u32 seq = nlh->nlmsg_seq;
	int err;

	r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
	if (r_skb == NULL)
		return -ENOMEM;

	err = build_sadinfo(r_skb, net, sportid, seq, *flags);
	BUG_ON(err < 0);

	return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
}

Project: linux
File: xfrm.h

static inline bool xfrm_addr_equal(const xfrm_address_t *a,
				   const xfrm_address_t *b,
				   sa_family_t family)
{
	switch (family) {
	default:
	case AF_INET:
		return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
	case AF_INET6:
		return xfrm6_addr_equal(a, b);
	}
}

Project: linux
File: xfrm_state.c

static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x,
			       const struct flowi *fl, unsigned short family,
			       struct xfrm_state **best, int *acq_in_progress,
			       int *error)
{
	/* Resolution logic:
	 * 1. There is a valid state with matching selector. Done.
	 * 2. Valid state with inappropriate selector. Skip.
	 *
	 * Entering area of "sysdeps".
	 *
	 * 3. If state is not valid, selector is temporary, it selects
	 *    only session which triggered previous resolution. Key
	 *    manager will do something to install a state with proper
	 *    selector.
	 */
	if (x->km.state == XFRM_STATE_VALID) {
		if ((x->sel.family &&
		     !xfrm_selector_match(&x->sel, fl, x->sel.family)) ||
		    !security_xfrm_state_pol_flow_match(x, pol, fl))
			return;

		if (!*best ||
		    (*best)->km.dying > x->km.dying ||
		    ((*best)->km.dying == x->km.dying &&
		     (*best)->curlft.add_time < x->curlft.add_time))
			*best = x;
	} else if (x->km.state == XFRM_STATE_ACQ) {
		*acq_in_progress = 1;
	} else if (x->km.state == XFRM_STATE_ERROR ||
		   x->km.state == XFRM_STATE_EXPIRED) {
		if (xfrm_selector_match(&x->sel, fl, x->sel.family) &&
		    security_xfrm_state_pol_flow_match(x, pol, fl))
			*error = -ESRCH;
	}
}

Project: linux
File: xfrm_user.c

static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
				       struct xfrm_replay_state_esn **preplay_esn,
				       struct nlattr *rta)
{
	struct xfrm_replay_state_esn *p, *pp, *up;
	unsigned int klen, ulen;

	if (!rta)
		return 0;

	up = nla_data(rta);
	klen = xfrm_replay_state_esn_len(up);
	ulen = nla_len(rta) >= (int)klen ? klen : sizeof(*up);

	p = kzalloc(klen, GFP_KERNEL);
	if (!p)
		return -ENOMEM;

	pp = kzalloc(klen, GFP_KERNEL);
	if (!pp) {
		kfree(p);
		return -ENOMEM;
	}

	memcpy(p, up, ulen);
	memcpy(pp, up, ulen);

	*replay_esn = p;
	*preplay_esn = pp;

	return 0;
}

Project: linux
File: xfrm_state.c

static void xfrm_put_type(const struct xfrm_type *type)
{
	module_put(type->owner);
}

Project: linux
File: xfrm.h

static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
{
	xfrm_pols_put(xdst->pols, xdst->num_pols);
	dst_release(xdst->route);
	if (likely(xdst->u.dst.xfrm))
		xfrm_state_put(xdst->u.dst.xfrm);
}

Project: linux
File: xfrm.h

static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
{
	int i;
	for (i = npols - 1; i >= 0; --i)
		xfrm_pol_put(pols[i]);
}

Project: linux
File: xfrm.h

static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
					   bool task_valid)
{
}

Project: linux
File: xfrm_user.c

static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
			     const struct xfrm_migrate *m, int num_migrate,
			     const struct xfrm_kmaddress *k,
			     const struct xfrm_encap_tmpl *encap)
{
	return -ENOPROTOOPT;
}

Project: linux
File: xfrm.h

static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
{
#ifdef CONFIG_XFRM
	struct sec_path *sp = skb_sec_path(skb);

	if (!sp || !sp->olen || sp->len != sp->olen)
		return NULL;

	return &sp->ovec[sp->olen - 1];
#else
	return NULL;
#endif
}

Project: linux
File: xfrm.h

static inline void xfrm_pol_hold(struct xfrm_policy *policy)
{
	if (likely(policy != NULL))
		refcount_inc(&policy->refcnt);
}

Project: linux
File: xfrm_user.c

static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
			     const struct xfrm_migrate *m, int num_migrate,
			     const struct xfrm_kmaddress *k,
			     const struct xfrm_encap_tmpl *encap)
{
	struct net *net = &init_net;
	struct sk_buff *skb;
	int err;

	skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap),
			GFP_ATOMIC);
	if (skb == NULL)
		return -ENOMEM;

	/* build migrate */
	err = build_migrate(skb, m, num_migrate, k, sel, encap, dir, type);
	BUG_ON(err < 0);

	return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
}

Project: linux
File: xfrm_state.c

int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
{
	int err = -EINVAL;
	struct xfrm_mgr *km;

	rcu_read_lock();
	list_for_each_entry_rcu(km, &xfrm_km_list, list) {
		if (km->new_mapping)
			err = km->new_mapping(x, ipaddr, sport);
		if (!err)
			break;
	}
	rcu_read_unlock();
	return err;
}

Project: linux
File: xfrm_state.c

void xfrm_state_fini(struct net *net)
{
	unsigned int sz;

	flush_work(&net->xfrm.state_hash_work);
	flush_work(&xfrm_state_gc_work);
	xfrm_state_flush(net, 0, false, true);

	WARN_ON(!list_empty(&net->xfrm.state_all));

	sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head);
	WARN_ON(!hlist_empty(net->xfrm.state_byspi));
	xfrm_hash_free(net->xfrm.state_byspi, sz);
	WARN_ON(!hlist_empty(net->xfrm.state_bysrc));
	xfrm_hash_free(net->xfrm.state_bysrc, sz);
	WARN_ON(!hlist_empty(net->xfrm.state_bydst));
	xfrm_hash_free(net->xfrm.state_bydst, sz);
}

Project: linux
File: xfrm6_tunnel.c

__be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr)
{
	struct xfrm6_tunnel_spi *x6spi;
	u32 spi;

	rcu_read_lock_bh();
	x6spi = __xfrm6_tunnel_spi_lookup(net, saddr);
	spi = x6spi ? x6spi->spi : 0;
	rcu_read_unlock_bh();
	return htonl(spi);
}

Project: linux
File: xfrm6_tunnel.c

static void __net_exit xfrm6_tunnel_net_exit(struct net *net)
{
	struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net);
	unsigned int i;

	xfrm_flush_gc();
	xfrm_state_flush(net, 0, false, true);

	for (i = 0; i < XFRM6_TUNNEL_SPI_BYADDR_HSIZE; i++)
		WARN_ON_ONCE(!hlist_empty(&xfrm6_tn->spi_byaddr[i]));

	for (i = 0; i < XFRM6_TUNNEL_SPI_BYSPI_HSIZE; i++)
		WARN_ON_ONCE(!hlist_empty(&xfrm6_tn->spi_byspi[i]));
}

Project: linux
File: xfrm_user.c

static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
{
	struct xfrm_dump_info *sp = ptr;
	struct xfrm_userpolicy_info *p;
	struct sk_buff *in_skb = sp->in_skb;
	struct sk_buff *skb = sp->out_skb;
	struct nlmsghdr *nlh;
	int err;

	nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
			XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
	if (nlh == NULL)
		return -EMSGSIZE;

	p = nlmsg_data(nlh);
	copy_to_user_policy(xp, p, dir);
	err = copy_to_user_tmpl(xp, skb);
	if (!err)
		err = copy_to_user_sec_ctx(xp, skb);
	if (!err)
		err = copy_to_user_policy_type(xp->type, skb);
	if (!err)
		err = xfrm_mark_put(skb, &xp->mark);
	if (!err)
		err = xfrm_if_id_put(skb, xp->if_id);
	if (err) {
		nlmsg_cancel(skb, nlh);
		return err;
	}
	nlmsg_end(skb, nlh);
	return 0;
}

Project: linux
File: xfrm_state.c

xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi,
		  u8 proto, unsigned short family)
{
	struct xfrm_state *x;

	rcu_read_lock();
	x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family);
	rcu_read_unlock();
	return x;
}

Project: linux
File: xfrm.h

static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
{
	return 1;
}

Project: linux
File: xfrm_user.c

static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
{
	int ret;

	switch (p->share) {
	case XFRM_SHARE_ANY:
	case XFRM_SHARE_SESSION:
	case XFRM_SHARE_USER:
	case XFRM_SHARE_UNIQUE:
		break;

	default:
		return -EINVAL;
	}

	switch (p->action) {
	case XFRM_POLICY_ALLOW:
	case XFRM_POLICY_BLOCK:
		break;

	default:
		return -EINVAL;
	}

	switch (p->sel.family) {
	case AF_INET:
		if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32)
			return -EINVAL;

		break;

	case AF_INET6:
#if IS_ENABLED(CONFIG_IPV6)
		if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128)
			return -EINVAL;

		break;
#else
		return  -EAFNOSUPPORT;
#endif

	default:
		return -EINVAL;
	}

	ret = verify_policy_dir(p->dir);
	if (ret)
		return ret;
	if (p->index && (xfrm_policy_id2dir(p->index) != p->dir))
		return -EINVAL;

	return 0;
}

Project: linux
File: xfrm_state.c

void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
				      struct sk_buff *skb)
{
	struct audit_buffer *audit_buf;
	u32 spi;

	audit_buf = xfrm_audit_start("SA-replay-overflow");
	if (audit_buf == NULL)
		return;
	xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
	/* don't record the sequence number because it's inherent in this kind
	 * of audit message */
	spi = ntohl(x->id.spi);
	audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
	audit_log_end(audit_buf);
}

Project: linux
File: xfrm_user.c

static inline int verify_replay(struct xfrm_usersa_info *p,
				struct nlattr **attrs)
{
	struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
	struct xfrm_replay_state_esn *rs;

	if (!rt)
		return (p->flags & XFRM_STATE_ESN) ? -EINVAL : 0;

	rs = nla_data(rt);

	if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8)
		return -EINVAL;

	if (nla_len(rt) < (int)xfrm_replay_state_esn_len(rs) &&
	    nla_len(rt) != sizeof(*rs))
		return -EINVAL;

	/* As only ESP and AH support ESN feature. */
	if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH))
		return -EINVAL;

	if (p->replay_window != 0)
		return -EINVAL;

	return 0;
}

Project: linux
File: xfrm.h

static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
{
	return 1;
}

Project: linux
File: xfrm_state.c

static inline unsigned int xfrm_src_hash(struct net *net,
					 const xfrm_address_t *daddr,
					 const xfrm_address_t *saddr,
					 unsigned short family)
{
	return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask);
}

Project: linux
File: xfrm_state.c

static void __xfrm_state_insert(struct xfrm_state *x)
{
	struct net *net = xs_net(x);
	unsigned int h;

	list_add(&x->km.all, &net->xfrm.state_all);

	h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr,
			  x->props.reqid, x->props.family);
	hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h);

	h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family);
	hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h);

	if (x->id.spi) {
		h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto,
				  x->props.family);

		hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h);
	}

	tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
	if (x->replay_maxage)
		mod_timer(&x->rtimer, jiffies + x->replay_maxage);

	net->xfrm.state_num++;

	xfrm_hash_grow_check(net, x->bydst.next != NULL);
}

Project: linux
File: xfrm_state.c

static enum hrtimer_restart xfrm_timer_handler(struct hrtimer *me)
{
	struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer);
	struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer);
	time64_t now = ktime_get_real_seconds();
	time64_t next = TIME64_MAX;
	int warn = 0;
	int err = 0;

	spin_lock(&x->lock);
	if (x->km.state == XFRM_STATE_DEAD)
		goto out;
	if (x->km.state == XFRM_STATE_EXPIRED)
		goto expired;
	if (x->lft.hard_add_expires_seconds) {
		long tmo = x->lft.hard_add_expires_seconds +
			x->curlft.add_time - now;
		if (tmo <= 0) {
			if (x->xflags & XFRM_SOFT_EXPIRE) {
				/* enter hard expire without soft expire first?!
				 * setting a new date could trigger this.
				 * workaround: fix x->curflt.add_time by below:
				 */
				x->curlft.add_time = now - x->saved_tmo - 1;
				tmo = x->lft.hard_add_expires_seconds - x->saved_tmo;
			} else
				goto expired;
		}
		if (tmo < next)
			next = tmo;
	}
	if (x->lft.hard_use_expires_seconds) {
		long tmo = x->lft.hard_use_expires_seconds +
			(x->curlft.use_time ? : now) - now;
		if (tmo <= 0)
			goto expired;
		if (tmo < next)
			next = tmo;
	}
	if (x->km.dying)
		goto resched;
	if (x->lft.soft_add_expires_seconds) {
		long tmo = x->lft.soft_add_expires_seconds +
			x->curlft.add_time - now;
		if (tmo <= 0) {
			warn = 1;
			x->xflags &= ~XFRM_SOFT_EXPIRE;
		} else if (tmo < next) {
			next = tmo;
			x->xflags |= XFRM_SOFT_EXPIRE;
			x->saved_tmo = tmo;
		}
	}
	if (x->lft.soft_use_expires_seconds) {
		long tmo = x->lft.soft_use_expires_seconds +
			(x->curlft.use_time ? : now) - now;
		if (tmo <= 0)
			warn = 1;
		else if (tmo < next)
			next = tmo;
	}

	x->km.dying = warn;
	if (warn)
		km_state_expired(x, 0, 0);
resched:
	if (next != TIME64_MAX) {
		tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL);
	}

	goto out;

expired:
	if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0)
		x->km.state = XFRM_STATE_EXPIRED;

	err = __xfrm_state_delete(x);
	if (!err)
		km_state_expired(x, 1, 0);

	xfrm_audit_state_delete(x, err ? 0 : 1, true);

out:
	spin_unlock(&x->lock);
	return HRTIMER_NORESTART;
}

Project: linux
File: xfrm_state.c

static void xfrm_audit_helper_sainfo(struct xfrm_state *x,
				     struct audit_buffer *audit_buf)
{
	struct xfrm_sec_ctx *ctx = x->security;
	u32 spi = ntohl(x->id.spi);

	if (ctx)
		audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s",
				 ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str);

	switch (x->props.family) {
	case AF_INET:
		audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
				 &x->props.saddr.a4, &x->id.daddr.a4);
		break;
	case AF_INET6:
		audit_log_format(audit_buf, " src=%pI6 dst=%pI6",
				 x->props.saddr.a6, x->id.daddr.a6);
		break;
	}

	audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
}

Project: linux
File: xfrm.h

static inline void xfrm_dev_state_free(struct xfrm_state *x)
{
	struct xfrm_state_offload *xso = &x->xso;
	struct net_device *dev = xso->dev;

	if (dev && dev->xfrmdev_ops) {
		if (dev->xfrmdev_ops->xdo_dev_state_free)
			dev->xfrmdev_ops->xdo_dev_state_free(x);
		xso->dev = NULL;
		dev_put(dev);
	}
}

Project: linux
File: xfrm_state.c

struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
					      unsigned short family)
{
	struct xfrm_state *x;
	struct xfrm_state_walk *w;

	spin_lock_bh(&net->xfrm.xfrm_state_lock);
	list_for_each_entry(w, &net->xfrm.state_all, all) {
		x = container_of(w, struct xfrm_state, km);
		if (x->props.family != family ||
			x->id.spi != spi)
			continue;

		xfrm_state_hold(x);
		spin_unlock_bh(&net->xfrm.xfrm_state_lock);
		return x;
	}
	spin_unlock_bh(&net->xfrm.xfrm_state_lock);
	return NULL;
}

Project: linux
File: xfrm_state.c

xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl,
		    const struct xfrm_tmpl *tmpl,
		    const xfrm_address_t *daddr, const xfrm_address_t *saddr,
		    unsigned short family)
{
	struct xfrm_state_afinfo *afinfo = xfrm_state_afinfo_get_rcu(family);

	if (!afinfo)
		return;

	afinfo->init_tempsel(&x->sel, fl);

	if (family != tmpl->encap_family) {
		afinfo = xfrm_state_afinfo_get_rcu(tmpl->encap_family);
		if (!afinfo)
			return;
	}
	afinfo->init_temprop(x, tmpl, daddr, saddr);
}

Project: linux
File: xfrm_state.c

bool km_is_alive(const struct km_event *c)
{
	struct xfrm_mgr *km;
	bool is_alive = false;

	rcu_read_lock();
	list_for_each_entry_rcu(km, &xfrm_km_list, list) {
		if (km->is_alive && km->is_alive(c)) {
			is_alive = true;
			break;
		}
	}
	rcu_read_unlock();

	return is_alive;
}

Project: linux
File: xfrm.h

static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
{
	return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
}

Project: linux
File: xfrm_user.c

static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
		struct nlattr **attrs)
{
	struct net *net = sock_net(skb->sk);
	struct xfrm_policy *xp;
	struct xfrm_user_polexpire *up = nlmsg_data(nlh);
	struct xfrm_userpolicy_info *p = &up->pol;
	u8 type = XFRM_POLICY_TYPE_MAIN;
	int err = -ENOENT;
	struct xfrm_mark m;
	u32 mark = xfrm_mark_get(attrs, &m);
	u32 if_id = 0;

	err = copy_from_user_policy_type(&type, attrs);
	if (err)
		return err;

	err = verify_policy_dir(p->dir);
	if (err)
		return err;

	if (attrs[XFRMA_IF_ID])
		if_id = nla_get_u32(attrs[XFRMA_IF_ID]);

	if (p->index)
		xp = xfrm_policy_byid(net, mark, if_id, type, p->dir, p->index, 0, &err);
	else {
		struct nlattr *rt = attrs[XFRMA_SEC_CTX];
		struct xfrm_sec_ctx *ctx;

		err = verify_sec_ctx_len(attrs);
		if (err)
			return err;

		ctx = NULL;
		if (rt) {
			struct xfrm_user_sec_ctx *uctx = nla_data(rt);

			err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
			if (err)
				return err;
		}
		xp = xfrm_policy_bysel_ctx(net, mark, if_id, type, p->dir,
					   &p->sel, ctx, 0, &err);
		security_xfrm_policy_free(ctx);
	}
	if (xp == NULL)
		return -ENOENT;

	if (unlikely(xp->walk.dead))
		goto out;

	err = 0;
	if (up->hard) {
		xfrm_policy_delete(xp, p->dir);
		xfrm_audit_policy_delete(xp, 1, true);
	}
	km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);

out:
	xfrm_pol_put(xp);
	return err;
}

Project: linux
File: xfrm.h

static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
{
	return false;
}

Project: linux
File: xfrm_user.c

static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
{
	memset(p, 0, sizeof(*p));
	memcpy(&p->id, &x->id, sizeof(p->id));
	memcpy(&p->sel, &x->sel, sizeof(p->sel));
	memcpy(&p->lft, &x->lft, sizeof(p->lft));
	memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
	put_unaligned(x->stats.replay_window, &p->stats.replay_window);
	put_unaligned(x->stats.replay, &p->stats.replay);
	put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed);
	memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
	p->mode = x->props.mode;
	p->replay_window = x->props.replay_window;
	p->reqid = x->props.reqid;
	p->family = x->props.family;
	p->flags = x->props.flags;
	p->seq = x->km.seq;
}

Project: linux
File: xfrm_state.c

xfrm_dev_state_flush_secctx_check(struct net *net, struct net_device *dev, bool task_valid)
{
	int i, err = 0;

	for (i = 0; i <= net->xfrm.state_hmask; i++) {
		struct xfrm_state *x;
		struct xfrm_state_offload *xso;

		hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
			xso = &x->xso;

			if (xso->dev == dev &&
			   (err = security_xfrm_state_delete(x)) != 0) {
				xfrm_audit_state_delete(x, 0, task_valid);
				return err;
			}
		}
	}

	return err;
}

Project: linux
File: xfrm_state.c

void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si)
{
	spin_lock_bh(&net->xfrm.xfrm_state_lock);
	si->sadcnt = net->xfrm.state_num;
	si->sadhcnt = net->xfrm.state_hmask + 1;
	si->sadhmcnt = xfrm_state_hashmax;
	spin_unlock_bh(&net->xfrm.xfrm_state_lock);
}

Project: linux
File: xfrm.h

xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
{
	switch (family){
	case AF_INET:
		return (xfrm_address_t *)&fl->u.ip4.daddr;
	case AF_INET6:
		return (xfrm_address_t *)&fl->u.ip6.daddr;
	}
	return NULL;
}

Project: linux
File: xfrm_state.c

xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid)
{
	int i, err = 0;

	for (i = 0; i <= net->xfrm.state_hmask; i++) {
		struct xfrm_state *x;

		hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
			if (xfrm_id_proto_match(x->id.proto, proto) &&
			   (err = security_xfrm_state_delete(x)) != 0) {
				xfrm_audit_state_delete(x, 0, task_valid);
				return err;
			}
		}
	}

	return err;
}

Project: linux
File: xfrm.h

static inline void __xfrm_state_put(struct xfrm_state *x)
{
	refcount_dec(&x->refcnt);
}

Project: linux
File: xfrm_user.c

static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
		struct nlattr **attrs)
{
	struct net *net = sock_net(skb->sk);
	struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
	struct xfrm_policy *xp;
	struct km_event c;
	int err;
	int excl;

	err = verify_newpolicy_info(p);
	if (err)
		return err;
	err = verify_sec_ctx_len(attrs);
	if (err)
		return err;

	xp = xfrm_policy_construct(net, p, attrs, &err);
	if (!xp)
		return err;

	/* shouldn't excl be based on nlh flags??
	 * Aha! this is anti-netlink really i.e  more pfkey derived
	 * in netlink excl is a flag and you wouldnt need
	 * a type XFRM_MSG_UPDPOLICY - JHS */
	excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
	err = xfrm_policy_insert(p->dir, xp, excl);
	xfrm_audit_policy_add(xp, err ? 0 : 1, true);

	if (err) {
		security_xfrm_policy_free(xp->security);
		kfree(xp);
		return err;
	}

	c.event = nlh->nlmsg_type;
	c.seq = nlh->nlmsg_seq;
	c.portid = nlh->nlmsg_pid;
	km_policy_notify(xp, p->dir, &c);

	xfrm_pol_put(xp);

	return 0;
}

Project: linux
File: xfrm_user.c

static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
			   int dir, const struct km_event *c)
{
	struct xfrm_user_polexpire *upe;
	int hard = c->data.hard;
	struct nlmsghdr *nlh;
	int err;

	nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
	if (nlh == NULL)
		return -EMSGSIZE;

	upe = nlmsg_data(nlh);
	copy_to_user_policy(xp, &upe->pol, dir);
	err = copy_to_user_tmpl(xp, skb);
	if (!err)
		err = copy_to_user_sec_ctx(xp, skb);
	if (!err)
		err = copy_to_user_policy_type(xp->type, skb);
	if (!err)
		err = xfrm_mark_put(skb, &xp->mark);
	if (!err)
		err = xfrm_if_id_put(skb, xp->if_id);
	if (err) {
		nlmsg_cancel(skb, nlh);
		return err;
	}
	upe->hard = !!hard;

	nlmsg_end(skb, nlh);
	return 0;
}

Project: linux
File: xfrm_user.c

static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
{
	memcpy(&x->id, &p->id, sizeof(x->id));
	memcpy(&x->sel, &p->sel, sizeof(x->sel));
	memcpy(&x->lft, &p->lft, sizeof(x->lft));
	x->props.mode = p->mode;
	x->props.replay_window = min_t(unsigned int, p->replay_window,
					sizeof(x->replay.bitmap) * 8);
	x->props.reqid = p->reqid;
	x->props.family = p->family;
	memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
	x->props.flags = p->flags;

	if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
		x->sel.family = p->family;
}

Project: linux
File: xfrm_user.c

static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
		struct nlattr **attrs)
{
	struct net *net = sock_net(skb->sk);
	struct km_event c;
	struct xfrm_usersa_flush *p = nlmsg_data(nlh);
	int err;

	err = xfrm_state_flush(net, p->proto, true, false);
	if (err) {
		if (err == -ESRCH) /* empty table */
			return 0;
		return err;
	}
	c.data.proto = p->proto;
	c.event = nlh->nlmsg_type;
	c.seq = nlh->nlmsg_seq;
	c.portid = nlh->nlmsg_pid;
	c.net = net;
	km_state_notify(NULL, &c);

	return 0;
}

Project: linux
File: xfrm_user.c

static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
				  int update_esn)
{
	struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
	struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
	struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
	struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
	struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];

	if (re) {
		struct xfrm_replay_state_esn *replay_esn;
		replay_esn = nla_data(re);
		memcpy(x->replay_esn, replay_esn,
		       xfrm_replay_state_esn_len(replay_esn));
		memcpy(x->preplay_esn, replay_esn,
		       xfrm_replay_state_esn_len(replay_esn));
	}

	if (rp) {
		struct xfrm_replay_state *replay;
		replay = nla_data(rp);
		memcpy(&x->replay, replay, sizeof(*replay));
		memcpy(&x->preplay, replay, sizeof(*replay));
	}

	if (lt) {
		struct xfrm_lifetime_cur *ltime;
		ltime = nla_data(lt);
		x->curlft.bytes = ltime->bytes;
		x->curlft.packets = ltime->packets;
		x->curlft.add_time = ltime->add_time;
		x->curlft.use_time = ltime->use_time;
	}

	if (et)
		x->replay_maxage = nla_get_u32(et);

	if (rt)
		x->replay_maxdiff = nla_get_u32(rt);
}

Project: linux
File: xfrm_user.c

static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
{
	struct net *net = xp_net(xp);
	struct sk_buff *skb;
	int err;

	skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
	if (skb == NULL)
		return -ENOMEM;

	err = build_polexpire(skb, xp, dir, c);
	BUG_ON(err < 0);

	return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
}

Project: linux
File: xfrm.h

static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
				      __be32 net_spi, __be32 net_seq)
{
}

Project: linux
File: xfrm.h

static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
				 int n, unsigned short family, struct net *net)
{
	return -ENOSYS;
}

Project: linux
File: xfrm_state.c

void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid)
{
	struct km_event c;

	c.data.hard = hard;
	c.portid = portid;
	c.event = XFRM_MSG_POLEXPIRE;
	km_policy_notify(pol, dir, &c);
}

Project: linux
File: xfrm.h

static inline unsigned int aead_len(struct xfrm_algo_aead *alg)
{
	return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
}

Project: linux
File: xfrm_state.c

int __net_init xfrm_state_init(struct net *net)
{
	unsigned int sz;

	if (net_eq(net, &init_net))
		xfrm_state_cache = KMEM_CACHE(xfrm_state,
					      SLAB_HWCACHE_ALIGN | SLAB_PANIC);

	INIT_LIST_HEAD(&net->xfrm.state_all);

	sz = sizeof(struct hlist_head) * 8;

	net->xfrm.state_bydst = xfrm_hash_alloc(sz);
	if (!net->xfrm.state_bydst)
		goto out_bydst;
	net->xfrm.state_bysrc = xfrm_hash_alloc(sz);
	if (!net->xfrm.state_bysrc)
		goto out_bysrc;
	net->xfrm.state_byspi = xfrm_hash_alloc(sz);
	if (!net->xfrm.state_byspi)
		goto out_byspi;
	net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1);

	net->xfrm.state_num = 0;
	INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize);
	spin_lock_init(&net->xfrm.xfrm_state_lock);
	return 0;

out_byspi:
	xfrm_hash_free(net->xfrm.state_bysrc, sz);
out_bysrc:
	xfrm_hash_free(net->xfrm.state_bydst, sz);
out_bydst:
	return -ENOMEM;
}

Project: linux
File: xfrm_state.c

int xfrm_state_check_expire(struct xfrm_state *x)
{
	if (!x->curlft.use_time)
		x->curlft.use_time = ktime_get_real_seconds();

	if (x->curlft.bytes >= x->lft.hard_byte_limit ||
	    x->curlft.packets >= x->lft.hard_packet_limit) {
		x->km.state = XFRM_STATE_EXPIRED;
		tasklet_hrtimer_start(&x->mtimer, 0, HRTIMER_MODE_REL);
		return -EINVAL;
	}

	if (!x->km.dying &&
	    (x->curlft.bytes >= x->lft.soft_byte_limit ||
	     x->curlft.packets >= x->lft.soft_packet_limit)) {
		x->km.dying = 1;
		km_state_expired(x, 0, 0);
	}
	return 0;
}

Project: linux
File: xfrm_state.c

xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid)
{
	return 0;
}

Project: linux
File: xfrm_state.c

static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
{
	struct xfrm_state_afinfo *afinfo;
	struct xfrm_mode *mode;
	int modload_attempted = 0;

	if (unlikely(encap >= XFRM_MODE_MAX))
		return NULL;

retry:
	afinfo = xfrm_state_get_afinfo(family);
	if (unlikely(afinfo == NULL))
		return NULL;

	mode = READ_ONCE(afinfo->mode_map[encap]);
	if (unlikely(mode && !try_module_get(mode->owner)))
		mode = NULL;

	rcu_read_unlock();
	if (!mode && !modload_attempted) {
		request_module("xfrm-mode-%d-%d", family, encap);
		modload_attempted = 1;
		goto retry;
	}

	return mode;
}

Project: linux
File: xfrm_state.c

struct xfrm_state *xfrm_state_alloc(struct net *net)
{
	struct xfrm_state *x;

	x = kmem_cache_alloc(xfrm_state_cache, GFP_ATOMIC | __GFP_ZERO);

	if (x) {
		write_pnet(&x->xs_net, net);
		refcount_set(&x->refcnt, 1);
		atomic_set(&x->tunnel_users, 0);
		INIT_LIST_HEAD(&x->km.all);
		INIT_HLIST_NODE(&x->bydst);
		INIT_HLIST_NODE(&x->bysrc);
		INIT_HLIST_NODE(&x->byspi);
		tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler,
					CLOCK_BOOTTIME, HRTIMER_MODE_ABS);
		timer_setup(&x->rtimer, xfrm_replay_timer_handler, 0);
		x->curlft.add_time = ktime_get_real_seconds();
		x->lft.soft_byte_limit = XFRM_INF;
		x->lft.soft_packet_limit = XFRM_INF;
		x->lft.hard_byte_limit = XFRM_INF;
		x->lft.hard_packet_limit = XFRM_INF;
		x->replay_maxage = 0;
		x->replay_maxdiff = 0;
		x->inner_mode = NULL;
		x->inner_mode_iaf = NULL;
		spin_lock_init(&x->lock);
	}
	return x;
}

Project: linux
File: xfrm_state.c

xfrm_state_lookup_byaddr(struct net *net, u32 mark,
			 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
			 u8 proto, unsigned short family)
{
	struct xfrm_state *x;

	spin_lock_bh(&net->xfrm.xfrm_state_lock);
	x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family);
	spin_unlock_bh(&net->xfrm.xfrm_state_lock);
	return x;
}

Project: linux
File: xfrm_user.c

static inline unsigned int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
{
	unsigned int len = 0;

	if (xfrm_ctx) {
		len += sizeof(struct xfrm_user_sec_ctx);
		len += xfrm_ctx->ctx_len;
	}
	return len;
}

Project: linux
File: xfrm.h

static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
					     struct sk_buff *skb)
{
	return 1;
}

Project: linux
File: xfrm_user.c

static inline unsigned int xfrm_migrate_msgsize(int num_migrate, int with_kma,
						int with_encp)
{
	return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
	      + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
	      + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0)
	      + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
	      + userpolicy_type_attrsize();
}

Project: linux
File: xfrm_user.c

static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
		struct nlattr **attrs)
{
	struct net *net = sock_net(skb->sk);
	struct xfrm_state *x;
	struct xfrm_userspi_info *p;
	struct sk_buff *resp_skb;
	xfrm_address_t *daddr;
	int family;
	int err;
	u32 mark;
	struct xfrm_mark m;
	u32 if_id = 0;

	p = nlmsg_data(nlh);
	err = verify_spi_info(p->info.id.proto, p->min, p->max);
	if (err)
		goto out_noput;

	family = p->info.family;
	daddr = &p->info.id.daddr;

	x = NULL;

	mark = xfrm_mark_get(attrs, &m);

	if (attrs[XFRMA_IF_ID])
		if_id = nla_get_u32(attrs[XFRMA_IF_ID]);

	if (p->info.seq) {
		x = xfrm_find_acq_byseq(net, mark, p->info.seq);
		if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
			xfrm_state_put(x);
			x = NULL;
		}
	}

	if (!x)
		x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
				  if_id, p->info.id.proto, daddr,
				  &p->info.saddr, 1,
				  family);
	err = -ENOENT;
	if (x == NULL)
		goto out_noput;

	err = xfrm_alloc_spi(x, p->min, p->max);
	if (err)
		goto out;

	resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
	if (IS_ERR(resp_skb)) {
		err = PTR_ERR(resp_skb);
		goto out;
	}

	err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);

out:
	xfrm_state_put(x);
out_noput:
	return err;
}

Project: linux
File: xfrm.h

static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
				    unsigned int family)
{
	bool tunnel = false;

	switch(family) {
	case AF_INET:
		if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
			tunnel = true;
		break;
	case AF_INET6:
		if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
			tunnel = true;
		break;
	}
	if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL))
		return -EINVAL;

	return 0;
}

Project: linux
File: xfrm.h

static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }

Project: linux
File: xfrm_state.c

static bool __xfrm_state_filter_match(struct xfrm_state *x,
				      struct xfrm_address_filter *filter)
{
	if (filter) {
		if ((filter->family == AF_INET ||
		     filter->family == AF_INET6) &&
		    x->props.family != filter->family)
			return false;

		return addr_match(&x->props.saddr, &filter->saddr,
				  filter->splen) &&
		       addr_match(&x->id.daddr, &filter->daddr,
				  filter->dplen);
	}
	return true;
}

Project: linux
File: xfrm6_tunnel.c

static int __xfrm6_tunnel_spi_check(struct net *net, u32 spi)
{
	struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net);
	struct xfrm6_tunnel_spi *x6spi;
	int index = xfrm6_tunnel_spi_hash_byspi(spi);

	hlist_for_each_entry(x6spi,
			     &xfrm6_tn->spi_byspi[index],
			     list_byspi) {
		if (x6spi->spi == spi)
			return -1;
	}
	return index;
}

Project: linux
File: xfrm.h

static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
{
	if (attrs[XFRMA_MARK])
		memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
	else
		m->v = m->m = 0;

	return m->v & m->m;
}

Project: linux
File: xfrm_user.c

static int attach_aead(struct xfrm_state *x, struct nlattr *rta)
{
	struct xfrm_algo_aead *p, *ualg;
	struct xfrm_algo_desc *algo;

	if (!rta)
		return 0;

	ualg = nla_data(rta);

	algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
	if (!algo)
		return -ENOSYS;
	x->props.ealgo = algo->desc.sadb_alg_id;

	p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
	if (!p)
		return -ENOMEM;

	strcpy(p->alg_name, algo->name);
	x->aead = p;
	x->geniv = algo->uinfo.aead.geniv;
	return 0;
}

Project: linux
File: xfrm_state.c

int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
{
	int err;
	u8 *data;
	struct xfrm_mgr *km;
	struct xfrm_policy *pol = NULL;

	if (in_compat_syscall())
		return -EOPNOTSUPP;

	if (!optval && !optlen) {
		xfrm_sk_policy_insert(sk, XFRM_POLICY_IN, NULL);
		xfrm_sk_policy_insert(sk, XFRM_POLICY_OUT, NULL);
		__sk_dst_reset(sk);
		return 0;
	}

	if (optlen <= 0 || optlen > PAGE_SIZE)
		return -EMSGSIZE;

	data = memdup_user(optval, optlen);
	if (IS_ERR(data))
		return PTR_ERR(data);

	err = -EINVAL;
	rcu_read_lock();
	list_for_each_entry_rcu(km, &xfrm_km_list, list) {
		pol = km->compile_policy(sk, optname, data,
					 optlen, &err);
		if (err >= 0)
			break;
	}
	rcu_read_unlock();

	if (err >= 0) {
		xfrm_sk_policy_insert(sk, err, pol);
		xfrm_pol_put(pol);
		__sk_dst_reset(sk);
		err = 0;
	}

	kfree(data);
	return err;
}

Project: linux
File: xfrm.h

static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
					      struct flowi *fl,
					      unsigned int family)
{
	return -ENOSYS;
}

Project: linux
File: xfrm.h

static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
				    const xfrm_address_t *b)
{
	return ipv6_addr_equal((const struct in6_addr *)a,
			       (const struct in6_addr *)b);
}

Project: linux
File: xfrm.h

static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
{
}

Project: linux
File: xfrm6_tunnel.c

static int __init xfrm6_tunnel_init(void)
{
	int rv;

	xfrm6_tunnel_spi_kmem = kmem_cache_create("xfrm6_tunnel_spi",
						  sizeof(struct xfrm6_tunnel_spi),
						  0, SLAB_HWCACHE_ALIGN,
						  NULL);
	if (!xfrm6_tunnel_spi_kmem)
		return -ENOMEM;
	rv = register_pernet_subsys(&xfrm6_tunnel_net_ops);
	if (rv < 0)
		goto out_pernet;
	rv = xfrm_register_type(&xfrm6_tunnel_type, AF_INET6);
	if (rv < 0)
		goto out_type;
	rv = xfrm6_tunnel_register(&xfrm6_tunnel_handler, AF_INET6);
	if (rv < 0)
		goto out_xfrm6;
	rv = xfrm6_tunnel_register(&xfrm46_tunnel_handler, AF_INET);
	if (rv < 0)
		goto out_xfrm46;
	return 0;

out_xfrm46:
	xfrm6_tunnel_deregister(&xfrm6_tunnel_handler, AF_INET6);
out_xfrm6:
	xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6);
out_type:
	unregister_pernet_subsys(&xfrm6_tunnel_net_ops);
out_pernet:
	kmem_cache_destroy(xfrm6_tunnel_spi_kmem);
	return rv;
}

Project: linux
File: xfrm_user.c

static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
					 struct nlattr *rp)
{
	struct xfrm_replay_state_esn *up;
	unsigned int ulen;

	if (!replay_esn || !rp)
		return 0;

	up = nla_data(rp);
	ulen = xfrm_replay_state_esn_len(up);

	/* Check the overall length and the internal bitmap length to avoid
	 * potential overflow. */
	if (nla_len(rp) < (int)ulen ||
	    xfrm_replay_state_esn_len(replay_esn) != ulen ||
	    replay_esn->bmp_len != up->bmp_len)
		return -EINVAL;

	if (up->replay_window > up->bmp_len * sizeof(__u32) * 8)
		return -EINVAL;

	return 0;
}

Project: linux
File: xfrm.h

static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
					 bool task_valid)
{
}

Project: linux
File: xfrm.h

__xfrm4_state_addr_check(const struct xfrm_state *x,
			 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
{
	if (daddr->a4 == x->id.daddr.a4 &&
	    (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
		return 1;
	return 0;
}

Project: linux
File: xfrm_state.c

struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
				      struct xfrm_migrate *m,
				      struct xfrm_encap_tmpl *encap)
{
	struct xfrm_state *xc;

	xc = xfrm_state_clone(x, encap);
	if (!xc)
		return NULL;

	memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr));
	memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr));

	/* add state */
	if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) {
		/* a care is needed when the destination address of the
		   state is to be updated as it is a part of triplet */
		xfrm_state_insert(xc);
	} else {
		if (xfrm_state_add(xc) < 0)
			goto error;
	}

	return xc;
error:
	xfrm_state_put(xc);
	return NULL;
}

Project: linux
File: xfrm_user.c

static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
{
	unsigned int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
	struct net *net = xp_net(xp);
	struct xfrm_userpolicy_info *p;
	struct xfrm_userpolicy_id *id;
	struct nlmsghdr *nlh;
	struct sk_buff *skb;
	unsigned int headlen;
	int err;

	headlen = sizeof(*p);
	if (c->event == XFRM_MSG_DELPOLICY) {
		len += nla_total_size(headlen);
		headlen = sizeof(*id);
	}
	len += userpolicy_type_attrsize();
	len += nla_total_size(sizeof(struct xfrm_mark));
	len += NLMSG_ALIGN(headlen);

	skb = nlmsg_new(len, GFP_ATOMIC);
	if (skb == NULL)
		return -ENOMEM;

	nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
	err = -EMSGSIZE;
	if (nlh == NULL)
		goto out_free_skb;

	p = nlmsg_data(nlh);
	if (c->event == XFRM_MSG_DELPOLICY) {
		struct nlattr *attr;

		id = nlmsg_data(nlh);
		memset(id, 0, sizeof(*id));
		id->dir = dir;
		if (c->data.byid)
			id->index = xp->index;
		else
			memcpy(&id->sel, &xp->selector, sizeof(id->sel));

		attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
		err = -EMSGSIZE;
		if (attr == NULL)
			goto out_free_skb;

		p = nla_data(attr);
	}

	copy_to_user_policy(xp, p, dir);
	err = copy_to_user_tmpl(xp, skb);
	if (!err)
		err = copy_to_user_policy_type(xp->type, skb);
	if (!err)
		err = xfrm_mark_put(skb, &xp->mark);
	if (!err)
		err = xfrm_if_id_put(skb, xp->if_id);
	if (err)
		goto out_free_skb;

	nlmsg_end(skb, nlh);

	return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);

out_free_skb:
	kfree_skb(skb);
	return err;
}

Project: linux
File: xfrm.h

xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
			   unsigned short family)
{
	switch (family) {
	case AF_INET:
		return __xfrm4_state_addr_check(x,
						(const xfrm_address_t *)&fl->u.ip4.daddr,
						(const xfrm_address_t *)&fl->u.ip4.saddr);
	case AF_INET6:
		return __xfrm6_state_addr_check(x,
						(const xfrm_address_t *)&fl->u.ip6.daddr,
						(const xfrm_address_t *)&fl->u.ip6.saddr);
	}
	return 0;
}

Project: linux
File: xfrm_user.c

static void xfrm_smark_init(struct nlattr **attrs, struct xfrm_mark *m)
{
	if (attrs[XFRMA_SET_MARK]) {
		m->v = nla_get_u32(attrs[XFRMA_SET_MARK]);
		if (attrs[XFRMA_SET_MARK_MASK])
			m->m = nla_get_u32(attrs[XFRMA_SET_MARK_MASK]);
		else
			m->m = 0xffffffff;
	} else {
		m->v = m->m = 0;
	}
}

Project: linux
File: xfrm.h

static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
{
	struct xfrm_state *x = dst->xfrm;
	struct xfrm_dst *xdst;

	if (!x || !x->type_offload)
		return false;

	xdst = (struct xfrm_dst *) dst;
	if (!x->xso.offload_handle && !xdst->child->xfrm)
		return true;
	if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) &&
	    !xdst->child->xfrm)
		return true;

	return false;
}

Project: linux
File: xfrm.h

static inline int xfrm_af2proto(unsigned int family)
{
	switch(family) {
	case AF_INET:
		return IPPROTO_IPIP;
	case AF_INET6:
		return IPPROTO_IPV6;
	default:
		return 0;
	}
}

Project: linux
File: xfrm_state.c

int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
{
	int err = -EINVAL, acqret;
	struct xfrm_mgr *km;

	rcu_read_lock();
	list_for_each_entry_rcu(km, &xfrm_km_list, list) {
		acqret = km->acquire(x, t, pol);
		if (!acqret)
			err = acqret;
	}
	rcu_read_unlock();
	return err;
}

Project: linux
File: xfrm.h

secpath_reset(struct sk_buff *skb)
{
#ifdef CONFIG_XFRM
	skb_ext_del(skb, SKB_EXT_SEC_PATH);
#endif
}

Project: linux
File: xfrm.h

static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
{
	return xfrm_policy_check(sk, dir, skb, AF_INET6);
}

Project: linux
File: xfrm_state.c

static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark,
					      const xfrm_address_t *daddr,
					      __be32 spi, u8 proto,
					      unsigned short family)
{
	unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family);
	struct xfrm_state *x;

	hlist_for_each_entry_rcu(x, net->xfrm.state_byspi + h, byspi) {
		if (x->props.family != family ||
		    x->id.spi       != spi ||
		    x->id.proto     != proto ||
		    !xfrm_addr_equal(&x->id.daddr, daddr, family))
			continue;

		if ((mark & x->mark.m) != x->mark.v)
			continue;
		if (!xfrm_state_hold_rcu(x))
			continue;
		return x;
	}

	return NULL;
}

Project: linux
File: xfrm.h

static inline void xfrm_audit_state_replay(struct xfrm_state *x,
					   struct sk_buff *skb, __be32 net_seq)
{
}

Project: linux
File: xfrm_state.c

static void xfrm_put_mode(struct xfrm_mode *mode)
{
	module_put(mode->owner);
}

Project: linux
File: xfrm.h

xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
{
	switch (family){
	case AF_INET:
		return (xfrm_address_t *)&fl->u.ip4.saddr;
	case AF_INET6:
		return (xfrm_address_t *)&fl->u.ip6.saddr;
	}
	return NULL;
}

Project: linux
File: xfrm.h

static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
{
	return false;
}

Project: linux
File: xfrm.h

static inline void xfrm6_fini(void)
{
	;
}

Project: linux
File: xfrm_state.c

void km_state_expired(struct xfrm_state *x, int hard, u32 portid)
{
	struct km_event c;

	c.data.hard = hard;
	c.portid = portid;
	c.event = XFRM_MSG_EXPIRE;
	km_state_notify(x, &c);
}

Project: linux
File: xfrm_user.c

static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
{
	struct xfrm_userpolicy_type upt;

	/* Sadly there are two holes in struct xfrm_userpolicy_type */
	memset(&upt, 0, sizeof(upt));
	upt.type = type;

	return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
}

Project: linux
File: xfrm.h

static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
{
	/* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
	if (sizeof(long) == 4 && prefixlen == 0)
		return true;
	return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen)));
}

Project: linux
File: xfrm_state.c

int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid)
{
	int i, err = 0, cnt = 0;

	spin_lock_bh(&net->xfrm.xfrm_state_lock);
	err = xfrm_dev_state_flush_secctx_check(net, dev, task_valid);
	if (err)
		goto out;

	err = -ESRCH;
	for (i = 0; i <= net->xfrm.state_hmask; i++) {
		struct xfrm_state *x;
		struct xfrm_state_offload *xso;
restart:
		hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
			xso = &x->xso;

			if (!xfrm_state_kern(x) && xso->dev == dev) {
				xfrm_state_hold(x);
				spin_unlock_bh(&net->xfrm.xfrm_state_lock);

				err = xfrm_state_delete(x);
				xfrm_audit_state_delete(x, err ? 0 : 1,
							task_valid);
				xfrm_state_put(x);
				if (!err)
					cnt++;

				spin_lock_bh(&net->xfrm.xfrm_state_lock);
				goto restart;
			}
		}
	}
	if (cnt)
		err = 0;

out:
	spin_unlock_bh(&net->xfrm.xfrm_state_lock);
	return err;
}

Project: linux
File: xfrm6_tunnel.c

static void xfrm6_tunnel_free_spi(struct net *net, xfrm_address_t *saddr)
{
	struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net);
	struct xfrm6_tunnel_spi *x6spi;
	struct hlist_node *n;

	spin_lock_bh(&xfrm6_tunnel_spi_lock);

	hlist_for_each_entry_safe(x6spi, n,
				  &xfrm6_tn->spi_byaddr[xfrm6_tunnel_spi_hash_byaddr(saddr)],
				  list_byaddr)
	{
		if (xfrm6_addr_equal(&x6spi->addr, saddr)) {
			if (refcount_dec_and_test(&x6spi->refcnt)) {
				hlist_del_rcu(&x6spi->list_byaddr);
				hlist_del_rcu(&x6spi->list_byspi);
				call_rcu(&x6spi->rcu_head, x6spi_destroy_rcu);
				break;
			}
		}
	}
	spin_unlock_bh(&xfrm6_tunnel_spi_lock);
}

Project: linux
File: xfrm.h

static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child)
{
	xdst->child = child;
}

Project: linux
File: xfrm_state.c

static void xfrm_hash_grow_check(struct net *net, int have_hash_collision)
{
	if (have_hash_collision &&
	    (net->xfrm.state_hmask + 1) < xfrm_state_hashmax &&
	    net->xfrm.state_num > net->xfrm.state_hmask)
		schedule_work(&net->xfrm.state_hash_work);
}

Project: linux
File: xfrm_state.c

void __xfrm_state_destroy(struct xfrm_state *x, bool sync)
{
	WARN_ON(x->km.state != XFRM_STATE_DEAD);

	if (sync) {
		synchronize_rcu();
		___xfrm_state_destroy(x);
	} else {
		spin_lock_bh(&xfrm_state_gc_lock);
		hlist_add_head(&x->gclist, &xfrm_state_gc_list);
		spin_unlock_bh(&xfrm_state_gc_lock);
		schedule_work(&xfrm_state_gc_work);
	}
}

Project: linux
File: af_key.c

static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x,
					      int add_keys, int hsc)
{
	struct sk_buff *skb;
	struct sadb_msg *hdr;
	struct sadb_sa *sa;
	struct sadb_lifetime *lifetime;
	struct sadb_address *addr;
	struct sadb_key *key;
	struct sadb_x_sa2 *sa2;
	struct sadb_x_sec_ctx *sec_ctx;
	struct xfrm_sec_ctx *xfrm_ctx;
	int ctx_size = 0;
	int size;
	int auth_key_size = 0;
	int encrypt_key_size = 0;
	int sockaddr_size;
	struct xfrm_encap_tmpl *natt = NULL;
	int mode;

	/* address family check */
	sockaddr_size = pfkey_sockaddr_size(x->props.family);
	if (!sockaddr_size)
		return ERR_PTR(-EINVAL);

	/* base, SA, (lifetime (HSC),) address(SD), (address(P),)
	   key(AE), (identity(SD),) (sensitivity)> */
	size = sizeof(struct sadb_msg) +sizeof(struct sadb_sa) +
		sizeof(struct sadb_lifetime) +
		((hsc & 1) ? sizeof(struct sadb_lifetime) : 0) +
		((hsc & 2) ? sizeof(struct sadb_lifetime) : 0) +
			sizeof(struct sadb_address)*2 +
				sockaddr_size*2 +
					sizeof(struct sadb_x_sa2);

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

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

	if (add_keys) {
		if (x->aalg && x->aalg->alg_key_len) {
			auth_key_size =
				PFKEY_ALIGN8((x->aalg->alg_key_len + 7) / 8);
			size += sizeof(struct sadb_key) + auth_key_size;
		}
		if (x->ealg && x->ealg->alg_key_len) {
			encrypt_key_size =
				PFKEY_ALIGN8((x->ealg->alg_key_len+7) / 8);
			size += sizeof(struct sadb_key) + encrypt_key_size;
		}
	}
	if (x->encap)
		natt = x->encap;

	if (natt && natt->encap_type) {
		size += sizeof(struct sadb_x_nat_t_type);
		size += sizeof(struct sadb_x_nat_t_port);
		size += sizeof(struct sadb_x_nat_t_port);
	}

	skb =  alloc_skb(size + 16, GFP_ATOMIC);
	if (skb == NULL)
		return ERR_PTR(-ENOBUFS);

	/* call should fill header later */
	hdr = 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 = 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;
	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:
		sa->sadb_sa_state = SADB_SASTATE_LARVAL;
		break;
	default:
		sa->sadb_sa_state = SADB_SASTATE_DEAD;
		break;
	}
	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->pfkey_supported) ?
					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->pfkey_supported) ?
					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->pfkey_supported) ?
					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;
	if (x->props.flags & XFRM_STATE_NOPMTUDISC)
		sa->sadb_sa_flags |= SADB_SAFLAGS_NOPMTUDISC;

	/* hard time */
	if (hsc & 2) {
		lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
		lifetime->sadb_lifetime_len =
			sizeof(struct sadb_lifetime)/sizeof(uint64_t);
		lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
		lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.hard_packet_limit);
		lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.hard_byte_limit);
		lifetime->sadb_lifetime_addtime = x->lft.hard_add_expires_seconds;
		lifetime->sadb_lifetime_usetime = x->lft.hard_use_expires_seconds;
	}
	/* soft time */
	if (hsc & 1) {
		lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
		lifetime->sadb_lifetime_len =
			sizeof(struct sadb_lifetime)/sizeof(uint64_t);
		lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
		lifetime->sadb_lifetime_allocations =  _X2KEY(x->lft.soft_packet_limit);
		lifetime->sadb_lifetime_bytes = _X2KEY(x->lft.soft_byte_limit);
		lifetime->sadb_lifetime_addtime = x->lft.soft_add_expires_seconds;
		lifetime->sadb_lifetime_usetime = x->lft.soft_use_expires_seconds;
	}
	/* current time */
	lifetime = skb_put(skb, sizeof(struct sadb_lifetime));
	lifetime->sadb_lifetime_len =
		sizeof(struct sadb_lifetime)/sizeof(uint64_t);
	lifetime->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
	lifetime->sadb_lifetime_allocations = x->curlft.packets;
	lifetime->sadb_lifetime_bytes = x->curlft.bytes;
	lifetime->sadb_lifetime_addtime = x->curlft.add_time;
	lifetime->sadb_lifetime_usetime = x->curlft.use_time;
	/* src address */
	addr = skb_put(skb, sizeof(struct sadb_address) + sockaddr_size);
	addr->sadb_address_len =
		(sizeof(struct sadb_address)+sockaddr_size)/
			sizeof(uint64_t);
	addr->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
	/* "if the ports are non-zero, then the sadb_address_proto field,
	   normally zero, MUST be filled in with the transport
	   protocol's number." - RFC2367 */
	addr->sadb_address_proto = 0;
	addr->sadb_address_reserved = 0;

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

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

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

	if (!xfrm_addr_equal(&x->sel.saddr, &x->props.saddr,
			     x->props.family)) {
		addr = 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;

		pfkey_sockaddr_fill(&x->sel.saddr, x->sel.sport,
				    (struct sockaddr *) (addr + 1),
				    x->props.family);
	}

	/* auth key */
	if (add_keys && auth_key_size) {
		key = skb_put(skb, sizeof(struct sadb_key) + auth_key_size);
		key->sadb_key_len = (sizeof(struct sadb_key) + auth_key_size) /
			sizeof(uint64_t);
		key->sadb_key_exttype = SADB_EXT_KEY_AUTH;
		key->sadb_key_bits = x->aalg->alg_key_len;
		key->sadb_key_reserved = 0;
		memcpy(key + 1, x->aalg->alg_key, (x->aalg->alg_key_len+7)/8);
	}
	/* encrypt key */
	if (add_keys && encrypt_key_size) {
		key = skb_put(skb, sizeof(struct sadb_key) + encrypt_key_size);
		key->sadb_key_len = (sizeof(struct sadb_key) +
				     encrypt_key_size) / sizeof(uint64_t);
		key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
		key->sadb_key_bits = x->ealg->alg_key_len;
		key->sadb_key_reserved = 0;
		memcpy(key + 1, x->ealg->alg_key,
		       (x->ealg->alg_key_len+7)/8);
	}

	/* sa */
	sa2 = 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;
	if ((mode = pfkey_mode_from_xfrm(x->props.mode)) < 0) {
		kfree_skb(skb);
		return ERR_PTR(-EINVAL);
	}
	sa2->sadb_x_sa2_mode = mode;
	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 = 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 = 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 = 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;
	}

	/* security context */
	if (xfrm_ctx) {
		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);
	}

	return skb;
}

Project: linux
File: xfrm_state.c

int xfrm_state_delete(struct xfrm_state *x)
{
	int err;

	spin_lock_bh(&x->lock);
	err = __xfrm_state_delete(x);
	spin_unlock_bh(&x->lock);

	return err;
}

Project: linux
File: xfrm_user.c

static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
		struct nlattr **attrs)
{
	struct net *net = sock_net(skb->sk);
	struct xfrm_usersa_info *p = nlmsg_data(nlh);
	struct xfrm_state *x;
	int err;
	struct km_event c;

	err = verify_newsa_info(p, attrs);
	if (err)
		return err;

	x = xfrm_state_construct(net, p, attrs, &err);
	if (!x)
		return err;

	xfrm_state_hold(x);
	if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
		err = xfrm_state_add(x);
	else
		err = xfrm_state_update(x);

	xfrm_audit_state_add(x, err ? 0 : 1, true);

	if (err < 0) {
		x->km.state = XFRM_STATE_DEAD;
		xfrm_dev_state_delete(x);
		__xfrm_state_put(x);
		goto out;
	}

	if (x->km.state == XFRM_STATE_VOID)
		x->km.state = XFRM_STATE_VALID;

	c.seq = nlh->nlmsg_seq;
	c.portid = nlh->nlmsg_pid;
	c.event = nlh->nlmsg_type;

	km_state_notify(x, &c);
out:
	xfrm_state_put(x);
	return err;
}

Project: linux
File: xfrm_state.c

__xfrm_state_locate(struct xfrm_state *x, int use_spi, int family)
{
	struct net *net = xs_net(x);
	u32 mark = x->mark.v & x->mark.m;

	if (use_spi)
		return __xfrm_state_lookup(net, mark, &x->id.daddr,
					   x->id.spi, x->id.proto, family);
	else
		return __xfrm_state_lookup_byaddr(net, mark,
						  &x->id.daddr,
						  &x->props.saddr,
						  x->id.proto, family);
}

Project: linux
File: xfrm_user.c

static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
{
	struct xfrm_user_expire *ue;
	struct nlmsghdr *nlh;
	int err;

	nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
	if (nlh == NULL)
		return -EMSGSIZE;

	ue = nlmsg_data(nlh);
	copy_to_user_state(x, &ue->state);
	ue->hard = (c->data.hard != 0) ? 1 : 0;
	/* clear the padding bytes */
	memset(&ue->hard + 1, 0, sizeof(*ue) - offsetofend(typeof(*ue), hard));

	err = xfrm_mark_put(skb, &x->mark);
	if (err)
		return err;

	err = xfrm_if_id_put(skb, x->if_id);
	if (err)
		return err;

	nlmsg_end(skb, nlh);
	return 0;
}

Project: linux
File: xfrm_state.c

xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
		    xfrm_address_t *daddr, xfrm_address_t *saddr,
		    unsigned short family, u8 mode, u8 proto, u32 reqid)
{
	unsigned int h;
	struct xfrm_state *rx = NULL, *x = NULL;

	spin_lock_bh(&net->xfrm.xfrm_state_lock);
	h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
	hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
		if (x->props.family == family &&
		    x->props.reqid == reqid &&
		    (mark & x->mark.m) == x->mark.v &&
		    x->if_id == if_id &&
		    !(x->props.flags & XFRM_STATE_WILDRECV) &&
		    xfrm_state_addr_check(x, daddr, saddr, family) &&
		    mode == x->props.mode &&
		    proto == x->id.proto &&
		    x->km.state == XFRM_STATE_VALID) {
			rx = x;
			break;
		}
	}

	if (rx)
		xfrm_state_hold(rx);
	spin_unlock_bh(&net->xfrm.xfrm_state_lock);


	return rx;
}

Project: linux
File: xfrm_state.c

void xfrm_flush_gc(void)
{
	flush_work(&xfrm_state_gc_work);
}

Project: linux
File: xfrm_state.c

int xfrm_unregister_km(struct xfrm_mgr *km)
{
	spin_lock_bh(&xfrm_km_lock);
	list_del_rcu(&km->list);
	spin_unlock_bh(&xfrm_km_lock);
	synchronize_rcu();
	return 0;
}

Project: linux
File: xfrm.h

static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
{
	return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
}

Project: linux
File: xfrm.h

static inline void xfrm_state_put(struct xfrm_state *x)
{
	if (refcount_dec_and_test(&x->refcnt))
		__xfrm_state_destroy(x, false);
}

Project: linux
File: xfrm_state.c

int xfrm_state_mtu(struct xfrm_state *x, int mtu)
{
	const struct xfrm_type *type = READ_ONCE(x->type);

	if (x->km.state == XFRM_STATE_VALID &&
	    type && type->get_mtu)
		return type->get_mtu(x, mtu);

	return mtu - x->props.header_len;
}

Project: linux
File: xfrm_user.c

static int build_spdinfo(struct sk_buff *skb, struct net *net,
			 u32 portid, u32 seq, u32 flags)
{
	struct xfrmk_spdinfo si;
	struct xfrmu_spdinfo spc;
	struct xfrmu_spdhinfo sph;
	struct xfrmu_spdhthresh spt4, spt6;
	struct nlmsghdr *nlh;
	int err;
	u32 *f;
	unsigned lseq;

	nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
	if (nlh == NULL) /* shouldn't really happen ... */
		return -EMSGSIZE;

	f = nlmsg_data(nlh);
	*f = flags;
	xfrm_spd_getinfo(net, &si);
	spc.incnt = si.incnt;
	spc.outcnt = si.outcnt;
	spc.fwdcnt = si.fwdcnt;
	spc.inscnt = si.inscnt;
	spc.outscnt = si.outscnt;
	spc.fwdscnt = si.fwdscnt;
	sph.spdhcnt = si.spdhcnt;
	sph.spdhmcnt = si.spdhmcnt;

	do {
		lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock);

		spt4.lbits = net->xfrm.policy_hthresh.lbits4;
		spt4.rbits = net->xfrm.policy_hthresh.rbits4;
		spt6.lbits = net->xfrm.policy_hthresh.lbits6;
		spt6.rbits = net->xfrm.policy_hthresh.rbits6;
	} while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq));

	err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
	if (!err)
		err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
	if (!err)
		err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4);
	if (!err)
		err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6);
	if (err) {
		nlmsg_cancel(skb, nlh);
		return err;
	}

	nlmsg_end(skb, nlh);
	return 0;
}

Project: linux
File: af_key.c

static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
{
	struct net *net = sock_net(sk);
	unsigned int dir;
	int err = 0, delete;
	struct sadb_x_policy *pol;
	struct xfrm_policy *xp;
	struct km_event c;

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

	dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
	if (dir >= XFRM_POLICY_MAX)
		return -EINVAL;

	delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
	xp = xfrm_policy_byid(net, DUMMY_MARK, 0, XFRM_POLICY_TYPE_MAIN,
			      dir, pol->sadb_x_policy_id, delete, &err);
	if (xp == NULL)
		return -ENOENT;

	if (delete) {
		xfrm_audit_policy_delete(xp, err ? 0 : 1, true);

		if (err)
			goto out;
		c.seq = hdr->sadb_msg_seq;
		c.portid = hdr->sadb_msg_pid;
		c.data.byid = 1;
		c.event = XFRM_MSG_DELPOLICY;
		km_policy_notify(xp, dir, &c);
	} else {
		err = key_pol_get_resp(sk, xp, hdr, dir);
	}

out:
	xfrm_pol_put(xp);
	return err;
}

Project: linux
File: xfrm6_tunnel.c

static void __exit xfrm6_tunnel_fini(void)
{
	xfrm6_tunnel_deregister(&xfrm46_tunnel_handler, AF_INET);
	xfrm6_tunnel_deregister(&xfrm6_tunnel_handler, AF_INET6);
	xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6);
	unregister_pernet_subsys(&xfrm6_tunnel_net_ops);
	/* Someone maybe has gotten the xfrm6_tunnel_spi.
	 * So need to wait it.
	 */
	rcu_barrier();
	kmem_cache_destroy(xfrm6_tunnel_spi_kmem);
}

Project: linux
File: xfrm_user.c

static bool xfrm_is_alive(const struct km_event *c)
{
	return (bool)xfrm_acquire_is_on(c->net);
}

Project: linux
File: xfrm_user.c

static int xfrm_send_report(struct net *net, u8 proto,
			    struct xfrm_selector *sel, xfrm_address_t *addr)
{
	struct sk_buff *skb;
	int err;

	skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
	if (skb == NULL)
		return -ENOMEM;

	err = build_report(skb, proto, sel, addr);
	BUG_ON(err < 0);

	return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
}

Project: linux
File: xfrm.h

static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
{
	XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
	XFRM_SPI_SKB_CB(skb)->family = AF_INET;
	XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
	return xfrm_input(skb, nexthdr, spi, 0);
}

Project: linux
File: xfrm.h

static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again)
{
	return skb;
}

Project: linux
File: xfrm_state.c

u32 xfrm_get_acqseq(void)
{
	u32 res;
	static atomic_t acqseq;

	do {
		res = atomic_inc_return(&acqseq);
	} while (!res);

	return res;
}

Project: linux
File: xfrm_user.c

static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
		struct nlattr **attrs)
{
	struct net *net = sock_net(skb->sk);
	struct xfrm_policy *xp;
	struct xfrm_user_tmpl *ut;
	int i;
	struct nlattr *rt = attrs[XFRMA_TMPL];
	struct xfrm_mark mark;

	struct xfrm_user_acquire *ua = nlmsg_data(nlh);
	struct xfrm_state *x = xfrm_state_alloc(net);
	int err = -ENOMEM;

	if (!x)
		goto nomem;

	xfrm_mark_get(attrs, &mark);

	err = verify_newpolicy_info(&ua->policy);
	if (err)
		goto free_state;

	/*   build an XP */
	xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
	if (!xp)
		goto free_state;

	memcpy(&x->id, &ua->id, sizeof(ua->id));
	memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
	memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
	xp->mark.m = x->mark.m = mark.m;
	xp->mark.v = x->mark.v = mark.v;
	ut = nla_data(rt);
	/* extract the templates and for each call km_key */
	for (i = 0; i < xp->xfrm_nr; i++, ut++) {
		struct xfrm_tmpl *t = &xp->xfrm_vec[i];
		memcpy(&x->id, &t->id, sizeof(x->id));
		x->props.mode = t->mode;
		x->props.reqid = t->reqid;
		x->props.family = ut->family;
		t->aalgos = ua->aalgos;
		t->ealgos = ua->ealgos;
		t->calgos = ua->calgos;
		err = km_query(x, t, xp);

	}

	xfrm_state_free(x);
	kfree(xp);

	return 0;

free_state:
	xfrm_state_free(x);
nomem:
	return err;
}

Project: linux
File: xfrm.h

static inline void xfrm_dev_state_free(struct xfrm_state *x)
{
}

Project: linux
File: xfrm_user.c

static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
		struct nlattr **attrs)
{
	struct net *net = sock_net(skb->sk);
	struct xfrm_usersa_id *p = nlmsg_data(nlh);
	struct xfrm_state *x;
	struct sk_buff *resp_skb;
	int err = -ESRCH;

	x = xfrm_user_state_lookup(net, p, attrs, &err);
	if (x == NULL)
		goto out_noput;

	resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
	if (IS_ERR(resp_skb)) {
		err = PTR_ERR(resp_skb);
	} else {
		err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
	}
	xfrm_state_put(x);
out_noput:
	return err;
}

Project: linux
File: xfrm_state.c

static inline unsigned int xfrm_dst_hash(struct net *net,
					 const xfrm_address_t *daddr,
					 const xfrm_address_t *saddr,
					 u32 reqid,
					 unsigned short family)
{
	return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask);
}

Project: linux
File: xfrm.h

static inline void xfrm_pol_put(struct xfrm_policy *policy)
{
	if (refcount_dec_and_test(&policy->refcnt))
		xfrm_policy_destroy(policy);
}

Project: linux
File: xfrm_user.c

static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
		struct nlattr **attrs)
{
	struct net *net = sock_net(skb->sk);
	struct xfrm_state *x;
	struct km_event c;
	int err = -EINVAL;
	u32 mark = 0;
	struct xfrm_mark m;
	struct xfrm_aevent_id *p = nlmsg_data(nlh);
	struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
	struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
	struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
	struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
	struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];

	if (!lt && !rp && !re && !et && !rt)
		return err;

	/* pedantic mode - thou shalt sayeth replaceth */
	if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
		return err;

	mark = xfrm_mark_get(attrs, &m);

	x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
	if (x == NULL)
		return -ESRCH;

	if (x->km.state != XFRM_STATE_VALID)
		goto out;

	err = xfrm_replay_verify_len(x->replay_esn, re);
	if (err)
		goto out;

	spin_lock_bh(&x->lock);
	xfrm_update_ae_params(x, attrs, 1);
	spin_unlock_bh(&x->lock);

	c.event = nlh->nlmsg_type;
	c.seq = nlh->nlmsg_seq;
	c.portid = nlh->nlmsg_pid;
	c.data.aevent = XFRM_AE_CU;
	km_state_notify(x, &c);
	err = 0;
out:
	xfrm_state_put(x);
	return err;
}

Project: linux
File: xfrm_state.c

void xfrm_audit_state_icvfail(struct xfrm_state *x,
			      struct sk_buff *skb, u8 proto)
{
	struct audit_buffer *audit_buf;
	__be32 net_spi;
	__be32 net_seq;

	audit_buf = xfrm_audit_start("SA-icv-failure");
	if (audit_buf == NULL)
		return;
	xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
	if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) {
		u32 spi = ntohl(net_spi);
		audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
				 spi, spi, ntohl(net_seq));
	}
	audit_log_end(audit_buf);
}

Project: linux
File: xfrm.h

xfrm_state_addr_check(const struct xfrm_state *x,
		      const xfrm_address_t *daddr, const xfrm_address_t *saddr,
		      unsigned short family)
{
	switch (family) {
	case AF_INET:
		return __xfrm4_state_addr_check(x, daddr, saddr);
	case AF_INET6:
		return __xfrm6_state_addr_check(x, daddr, saddr);
	}
	return 0;
}

Project: linux
File: xfrm_user.c

static inline unsigned int xfrm_sa_len(struct xfrm_state *x)
{
	unsigned int l = 0;
	if (x->aead)
		l += nla_total_size(aead_len(x->aead));
	if (x->aalg) {
		l += nla_total_size(sizeof(struct xfrm_algo) +
				    (x->aalg->alg_key_len + 7) / 8);
		l += nla_total_size(xfrm_alg_auth_len(x->aalg));
	}
	if (x->ealg)
		l += nla_total_size(xfrm_alg_len(x->ealg));
	if (x->calg)
		l += nla_total_size(sizeof(*x->calg));
	if (x->encap)
		l += nla_total_size(sizeof(*x->encap));
	if (x->tfcpad)
		l += nla_total_size(sizeof(x->tfcpad));
	if (x->replay_esn)
		l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
	else
		l += nla_total_size(sizeof(struct xfrm_replay_state));
	if (x->security)
		l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
				    x->security->ctx_len);
	if (x->coaddr)
		l += nla_total_size(sizeof(*x->coaddr));
	if (x->props.extra_flags)
		l += nla_total_size(sizeof(x->props.extra_flags));
	if (x->xso.dev)
		 l += nla_total_size(sizeof(x->xso));
	if (x->props.smark.v | x->props.smark.m) {
		l += nla_total_size(sizeof(x->props.smark.v));
		l += nla_total_size(sizeof(x->props.smark.m));
	}
	if (x->if_id)
		l += nla_total_size(sizeof(x->if_id));

	/* Must count x->lastused as it may become non-zero behind our back. */
	l += nla_total_size_64bit(sizeof(u64));

	return l;
}

Project: linux
File: xfrm_state.c

static void ___xfrm_state_destroy(struct xfrm_state *x)
{
	tasklet_hrtimer_cancel(&x->mtimer);
	del_timer_sync(&x->rtimer);
	kfree(x->aead);
	kfree(x->aalg);
	kfree(x->ealg);
	kfree(x->calg);
	kfree(x->encap);
	kfree(x->coaddr);
	kfree(x->replay_esn);
	kfree(x->preplay_esn);
	if (x->inner_mode)
		xfrm_put_mode(x->inner_mode);
	if (x->inner_mode_iaf)
		xfrm_put_mode(x->inner_mode_iaf);
	if (x->outer_mode)
		xfrm_put_mode(x->outer_mode);
	if (x->type_offload)
		xfrm_put_type_offload(x->type_offload);
	if (x->type) {
		x->type->destructor(x);
		xfrm_put_type(x->type);
	}
	xfrm_dev_state_free(x);
	security_xfrm_state_free(x);
	xfrm_state_free(x);
}

Project: linux
File: xfrm.h

static inline void xfrm_audit_helper_usrinfo(bool task_valid,
					     struct audit_buffer *audit_buf)
{
	const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
					    audit_get_loginuid(current) :
					    INVALID_UID);
	const unsigned int ses = task_valid ? audit_get_sessionid(current) :
		AUDIT_SID_UNSET;

	audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
	audit_log_task_context(audit_buf);
}

Project: linux
File: xfrm.h

static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
{
	int ret = 0;

	if (m->m | m->v)
		ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
	return ret;
}

Project: linux
File: xfrm.h

static inline int xfrm_replay_clone(struct xfrm_state *x,
				     struct xfrm_state *orig)
{
	x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
				GFP_KERNEL);
	if (!x->replay_esn)
		return -ENOMEM;

	x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
	x->replay_esn->replay_window = orig->replay_esn->replay_window;

	x->preplay_esn = kmemdup(x->replay_esn,
				 xfrm_replay_state_esn_len(x->replay_esn),
				 GFP_KERNEL);
	if (!x->preplay_esn) {
		kfree(x->replay_esn);
		return -ENOMEM;
	}

	return 0;
}

Project: linux
File: xfrm.h

__xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
{
	return	(!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
		 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
}

Project: linux
File: xfrm_user.c

static int xfrm_dump_policy_start(struct netlink_callback *cb)
{
	struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;

	BUILD_BUG_ON(sizeof(*walk) > sizeof(cb->args));

	xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
	return 0;
}

Project: linux
File: xfrm.h

static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
{
	struct sec_path *sp = skb_sec_path(skb);

	return sp->xvec[sp->len - 1];
}

Project: linux
File: xfrm_user.c

static int verify_newsa_info(struct xfrm_usersa_info *p,
			     struct nlattr **attrs)
{
	int err;

	err = -EINVAL;
	switch (p->family) {
	case AF_INET:
		if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32)
			goto out;

		break;

	case AF_INET6:
#if IS_ENABLED(CONFIG_IPV6)
		if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128)
			goto out;

		break;
#else
		err = -EAFNOSUPPORT;
		goto out;
#endif

	default:
		goto out;
	}

	err = -EINVAL;
	switch (p->id.proto) {
	case IPPROTO_AH:
		if ((!attrs[XFRMA_ALG_AUTH]	&&
		     !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
		    attrs[XFRMA_ALG_AEAD]	||
		    attrs[XFRMA_ALG_CRYPT]	||
		    attrs[XFRMA_ALG_COMP]	||
		    attrs[XFRMA_TFCPAD])
			goto out;
		break;

	case IPPROTO_ESP:
		if (attrs[XFRMA_ALG_COMP])
			goto out;
		if (!attrs[XFRMA_ALG_AUTH] &&
		    !attrs[XFRMA_ALG_AUTH_TRUNC] &&
		    !attrs[XFRMA_ALG_CRYPT] &&
		    !attrs[XFRMA_ALG_AEAD])
			goto out;
		if ((attrs[XFRMA_ALG_AUTH] ||
		     attrs[XFRMA_ALG_AUTH_TRUNC] ||
		     attrs[XFRMA_ALG_CRYPT]) &&
		    attrs[XFRMA_ALG_AEAD])
			goto out;
		if (attrs[XFRMA_TFCPAD] &&
		    p->mode != XFRM_MODE_TUNNEL)
			goto out;
		break;

	case IPPROTO_COMP:
		if (!attrs[XFRMA_ALG_COMP]	||
		    attrs[XFRMA_ALG_AEAD]	||
		    attrs[XFRMA_ALG_AUTH]	||
		    attrs[XFRMA_ALG_AUTH_TRUNC]	||
		    attrs[XFRMA_ALG_CRYPT]	||
		    attrs[XFRMA_TFCPAD]		||
		    (ntohl(p->id.spi) >= 0x10000))
			goto out;
		break;

#if IS_ENABLED(CONFIG_IPV6)
	case IPPROTO_DSTOPTS:
	case IPPROTO_ROUTING:
		if (attrs[XFRMA_ALG_COMP]	||
		    attrs[XFRMA_ALG_AUTH]	||
		    attrs[XFRMA_ALG_AUTH_TRUNC]	||
		    attrs[XFRMA_ALG_AEAD]	||
		    attrs[XFRMA_ALG_CRYPT]	||
		    attrs[XFRMA_ENCAP]		||
		    attrs[XFRMA_SEC_CTX]	||
		    attrs[XFRMA_TFCPAD]		||
		    !attrs[XFRMA_COADDR])
			goto out;
		break;
#endif

	default:
		goto out;
	}

	if ((err = verify_aead(attrs)))
		goto out;
	if ((err = verify_auth_trunc(attrs)))
		goto out;
	if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
		goto out;
	if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
		goto out;
	if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
		goto out;
	if ((err = verify_sec_ctx_len(attrs)))
		goto out;
	if ((err = verify_replay(p, attrs)))
		goto out;

	err = -EINVAL;
	switch (p->mode) {
	case XFRM_MODE_TRANSPORT:
	case XFRM_MODE_TUNNEL:
	case XFRM_MODE_ROUTEOPTIMIZATION:
	case XFRM_MODE_BEET:
		break;

	default:
		goto out;
	}

	err = 0;

out:
	return err;
}

Project: linux
File: xfrm_user.c

static inline unsigned int userpolicy_type_attrsize(void)
{
#ifdef CONFIG_XFRM_SUB_POLICY
	return nla_total_size(sizeof(struct xfrm_userpolicy_type));
#else
	return 0;
#endif
}

Project: linux
File: xfrm_state.c

static void xfrm_put_type_offload(const struct xfrm_type_offload *type)
{
	module_put(type->owner);
}

Project: linux
File: xfrm_user.c

static int copy_to_user_state_extra(struct xfrm_state *x,
				    struct xfrm_usersa_info *p,
				    struct sk_buff *skb)
{
	int ret = 0;

	copy_to_user_state(x, p);

	if (x->props.extra_flags) {
		ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
				  x->props.extra_flags);
		if (ret)
			goto out;
	}

	if (x->coaddr) {
		ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
		if (ret)
			goto out;
	}
	if (x->lastused) {
		ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused,
					XFRMA_PAD);
		if (ret)
			goto out;
	}
	if (x->aead) {
		ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
		if (ret)
			goto out;
	}
	if (x->aalg) {
		ret = copy_to_user_auth(x->aalg, skb);
		if (!ret)
			ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
				      xfrm_alg_auth_len(x->aalg), x->aalg);
		if (ret)
			goto out;
	}
	if (x->ealg) {
		ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
		if (ret)
			goto out;
	}
	if (x->calg) {
		ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
		if (ret)
			goto out;
	}
	if (x->encap) {
		ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
		if (ret)
			goto out;
	}
	if (x->tfcpad) {
		ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
		if (ret)
			goto out;
	}
	ret = xfrm_mark_put(skb, &x->mark);
	if (ret)
		goto out;

	ret = xfrm_smark_put(skb, &x->props.smark);
	if (ret)
		goto out;

	if (x->replay_esn)
		ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
			      xfrm_replay_state_esn_len(x->replay_esn),
			      x->replay_esn);
	else
		ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
			      &x->replay);
	if (ret)
		goto out;
	if(x->xso.dev)
		ret = copy_user_offload(&x->xso, skb);
	if (ret)
		goto out;
	if (x->if_id) {
		ret = nla_put_u32(skb, XFRMA_IF_ID, x->if_id);
		if (ret)
			goto out;
	}
	if (x->security)
		ret = copy_sec_ctx(x->security, skb);
out:
	return ret;
}

Project: linux
File: xfrm_user.c

static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
{
	struct net *net = xs_net(x);
	struct sk_buff *skb;
	int err;

	skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
	if (skb == NULL)
		return -ENOMEM;

	err = build_aevent(skb, x, c);
	BUG_ON(err < 0);

	return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
}

Project: linux
File: xfrm_state.c

static struct xfrm_state *__find_acq_core(struct net *net,
					  const struct xfrm_mark *m,
					  unsigned short family, u8 mode,
					  u32 reqid, u32 if_id, u8 proto,
					  const xfrm_address_t *daddr,
					  const xfrm_address_t *saddr,
					  int create)
{
	unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
	struct xfrm_state *x;
	u32 mark = m->v & m->m;

	hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
		if (x->props.reqid  != reqid ||
		    x->props.mode   != mode ||
		    x->props.family != family ||
		    x->km.state     != XFRM_STATE_ACQ ||
		    x->id.spi       != 0 ||
		    x->id.proto	    != proto ||
		    (mark & x->mark.m) != x->mark.v ||
		    !xfrm_addr_equal(&x->id.daddr, daddr, family) ||
		    !xfrm_addr_equal(&x->props.saddr, saddr, family))
			continue;

		xfrm_state_hold(x);
		return x;
	}

	if (!create)
		return NULL;

	x = xfrm_state_alloc(net);
	if (likely(x)) {
		switch (family) {
		case AF_INET:
			x->sel.daddr.a4 = daddr->a4;
			x->sel.saddr.a4 = saddr->a4;
			x->sel.prefixlen_d = 32;
			x->sel.prefixlen_s = 32;
			x->props.saddr.a4 = saddr->a4;
			x->id.daddr.a4 = daddr->a4;
			break;

		case AF_INET6:
			x->sel.daddr.in6 = daddr->in6;
			x->sel.saddr.in6 = saddr->in6;
			x->sel.prefixlen_d = 128;
			x->sel.prefixlen_s = 128;
			x->props.saddr.in6 = saddr->in6;
			x->id.daddr.in6 = daddr->in6;
			break;
		}

		x->km.state = XFRM_STATE_ACQ;
		x->id.proto = proto;
		x->props.family = family;
		x->props.mode = mode;
		x->props.reqid = reqid;
		x->if_id = if_id;
		x->mark.v = m->v;
		x->mark.m = m->m;
		x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
		xfrm_state_hold(x);
		tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
		list_add(&x->km.all, &net->xfrm.state_all);
		hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h);
		h = xfrm_src_hash(net, daddr, saddr, family);
		hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h);

		net->xfrm.state_num++;

		xfrm_hash_grow_check(net, x->bydst.next != NULL);
	}

	return x;
}

Project: linux
File: xfrm_user.c

static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
		struct nlattr **attrs)
{
	struct net *net = sock_net(skb->sk);
	struct xfrm_state *x;
	struct sk_buff *r_skb;
	int err;
	struct km_event c;
	u32 mark;
	struct xfrm_mark m;
	struct xfrm_aevent_id *p = nlmsg_data(nlh);
	struct xfrm_usersa_id *id = &p->sa_id;

	mark = xfrm_mark_get(attrs, &m);

	x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
	if (x == NULL)
		return -ESRCH;

	r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
	if (r_skb == NULL) {
		xfrm_state_put(x);
		return -ENOMEM;
	}

	/*
	 * XXX: is this lock really needed - none of the other
	 * gets lock (the concern is things getting updated
	 * while we are still reading) - jhs
	*/
	spin_lock_bh(&x->lock);
	c.data.aevent = p->flags;
	c.seq = nlh->nlmsg_seq;
	c.portid = nlh->nlmsg_pid;

	err = build_aevent(r_skb, x, &c);
	BUG_ON(err < 0);

	err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
	spin_unlock_bh(&x->lock);
	xfrm_state_put(x);
	return err;
}

Project: linux
File: xfrm_user.c

static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
			   struct nlattr **attrs)
{
	struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
	struct xfrm_migrate m[XFRM_MAX_DEPTH];
	struct xfrm_kmaddress km, *kmp;
	u8 type;
	int err;
	int n = 0;
	struct net *net = sock_net(skb->sk);
	struct xfrm_encap_tmpl  *encap = NULL;

	if (attrs[XFRMA_MIGRATE] == NULL)
		return -EINVAL;

	kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;

	err = copy_from_user_policy_type(&type, attrs);
	if (err)
		return err;

	err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
	if (err)
		return err;

	if (!n)
		return 0;

	if (attrs[XFRMA_ENCAP]) {
		encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
				sizeof(*encap), GFP_KERNEL);
		if (!encap)
			return 0;
	}

	err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap);

	kfree(encap);

	return err;
}

Project: linux
File: xfrm_user.c

static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
			 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
{
	__u32 seq = xfrm_get_acqseq();
	struct xfrm_user_acquire *ua;
	struct nlmsghdr *nlh;
	int err;

	nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
	if (nlh == NULL)
		return -EMSGSIZE;

	ua = nlmsg_data(nlh);
	memcpy(&ua->id, &x->id, sizeof(ua->id));
	memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
	memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
	copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
	ua->aalgos = xt->aalgos;
	ua->ealgos = xt->ealgos;
	ua->calgos = xt->calgos;
	ua->seq = x->km.seq = seq;

	err = copy_to_user_tmpl(xp, skb);
	if (!err)
		err = copy_to_user_state_sec_ctx(x, skb);
	if (!err)
		err = copy_to_user_policy_type(xp->type, skb);
	if (!err)
		err = xfrm_mark_put(skb, &xp->mark);
	if (!err)
		err = xfrm_if_id_put(skb, xp->if_id);
	if (err) {
		nlmsg_cancel(skb, nlh);
		return err;
	}

	nlmsg_end(skb, nlh);
	return 0;
}

Project: linux
File: xfrm_state.c

int xfrm_register_mode(struct xfrm_mode *mode, int family)
{
	struct xfrm_state_afinfo *afinfo;
	struct xfrm_mode **modemap;
	int err;

	if (unlikely(mode->encap >= XFRM_MODE_MAX))
		return -EINVAL;

	afinfo = xfrm_state_get_afinfo(family);
	if (unlikely(afinfo == NULL))
		return -EAFNOSUPPORT;

	err = -EEXIST;
	modemap = afinfo->mode_map;
	spin_lock_bh(&xfrm_mode_lock);
	if (modemap[mode->encap])
		goto out;

	err = -ENOENT;
	if (!try_module_get(afinfo->owner))
		goto out;

	mode->afinfo = afinfo;
	modemap[mode->encap] = mode;
	err = 0;

out:
	spin_unlock_bh(&xfrm_mode_lock);
	rcu_read_unlock();
	return err;
}

Project: linux
File: xfrm_state.c

static void xfrm_state_gc_task(struct work_struct *work)
{
	struct xfrm_state *x;
	struct hlist_node *tmp;
	struct hlist_head gc_list;

	spin_lock_bh(&xfrm_state_gc_lock);
	hlist_move_list(&xfrm_state_gc_list, &gc_list);
	spin_unlock_bh(&xfrm_state_gc_lock);

	synchronize_rcu();

	hlist_for_each_entry_safe(x, tmp, &gc_list, gclist)
		___xfrm_state_destroy(x);
}

Project: linux
File: xfrm.h

static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst)
{
#ifdef CONFIG_XFRM
	if (dst->xfrm) {
		const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst;

		return xdst->path;
	}
#endif
	return (struct dst_entry *) dst;
}

Project: linux
File: xfrm_user.c

static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
{
	struct net *net = sock_net(skb->sk);
	struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
	struct xfrm_dump_info info;

	BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
		     sizeof(cb->args) - sizeof(cb->args[0]));

	info.in_skb = cb->skb;
	info.out_skb = skb;
	info.nlmsg_seq = cb->nlh->nlmsg_seq;
	info.nlmsg_flags = NLM_F_MULTI;

	if (!cb->args[0]) {
		struct nlattr *attrs[XFRMA_MAX+1];
		struct xfrm_address_filter *filter = NULL;
		u8 proto = 0;
		int err;

		err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX, xfrma_policy,
				  cb->extack);
		if (err < 0)
			return err;

		if (attrs[XFRMA_ADDRESS_FILTER]) {
			filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]),
					 sizeof(*filter), GFP_KERNEL);
			if (filter == NULL)
				return -ENOMEM;
		}

		if (attrs[XFRMA_PROTO])
			proto = nla_get_u8(attrs[XFRMA_PROTO]);

		xfrm_state_walk_init(walk, proto, filter);
		cb->args[0] = 1;
	}

	(void) xfrm_state_walk(net, walk, dump_one_state, &info);

	return skb->len;
}

Project: linux
File: xfrm.h

static inline int xfrm6_route_forward(struct sk_buff *skb)
{
	return xfrm_route_forward(skb, AF_INET6);
}

Project: linux
File: xfrm.h

static inline int __xfrm_policy_check2(struct sock *sk, int dir,
				       struct sk_buff *skb,
				       unsigned int family, int reverse)
{
	struct net *net = dev_net(skb->dev);
	int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);

	if (sk && sk->sk_policy[XFRM_POLICY_IN])
		return __xfrm_policy_check(sk, ndir, skb, family);

	return	(!net->xfrm.policy_count[dir] && !secpath_exists(skb)) ||
		(skb_dst(skb)->flags & DST_NOPOLICY) ||
		__xfrm_policy_check(sk, ndir, skb, family);
}

Project: linux
File: xfrm_user.c

static inline unsigned int xfrm_spdinfo_msgsize(void)
{
	return NLMSG_ALIGN(4)
	       + nla_total_size(sizeof(struct xfrmu_spdinfo))
	       + nla_total_size(sizeof(struct xfrmu_spdhinfo))
	       + nla_total_size(sizeof(struct xfrmu_spdhthresh))
	       + nla_total_size(sizeof(struct xfrmu_spdhthresh));
}

Project: linux
File: xfrm_user.c

static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
		struct nlattr **attrs)
{
	struct net *net = sock_net(skb->sk);
	struct xfrm_state *x;
	int err;
	struct xfrm_user_expire *ue = nlmsg_data(nlh);
	struct xfrm_usersa_info *p = &ue->state;
	struct xfrm_mark m;
	u32 mark = xfrm_mark_get(attrs, &m);

	x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);

	err = -ENOENT;
	if (x == NULL)
		return err;

	spin_lock_bh(&x->lock);
	err = -EINVAL;
	if (x->km.state != XFRM_STATE_VALID)
		goto out;
	km_state_expired(x, ue->hard, nlh->nlmsg_pid);

	if (ue->hard) {
		__xfrm_state_delete(x);
		xfrm_audit_state_delete(x, 1, true);
	}
	err = 0;
out:
	spin_unlock_bh(&x->lock);
	xfrm_state_put(x);
	return err;
}

Project: linux
File: xfrm.h

static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
					     struct sk_buff *skb)
{
	return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
}

Project: linux
File: xfrm.h

static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
{
	return (!userproto || proto == userproto ||
		(userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
						  proto == IPPROTO_ESP ||
						  proto == IPPROTO_COMP)));
}

Project: linux
File: xfrm.h

static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
{
	return 0;
}

Project: linux
File: xfrm_user.c

static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
{
	struct xfrm_user_sec_ctx *uctx;
	struct nlattr *attr;
	int ctx_size = sizeof(*uctx) + s->ctx_len;

	attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
	if (attr == NULL)
		return -EMSGSIZE;

	uctx = nla_data(attr);
	uctx->exttype = XFRMA_SEC_CTX;
	uctx->len = ctx_size;
	uctx->ctx_doi = s->ctx_doi;
	uctx->ctx_alg = s->ctx_alg;
	uctx->ctx_len = s->ctx_len;
	memcpy(uctx + 1, s->ctx_str, s->ctx_len);

	return 0;
}

Project: linux
File: xfrm.h

static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x)
{
	struct xfrm_mark *m = &x->props.smark;

	return (m->v & m->m) | (mark & ~m->m);
}

Project: linux
File: xfrm_user.c

static void xfrm_netlink_rcv(struct sk_buff *skb)
{
	struct net *net = sock_net(skb->sk);

	mutex_lock(&net->xfrm.xfrm_cfg_mutex);
	netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
	mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
}

Project: linux
File: xfrm.h

static inline void xfrm_dev_state_delete(struct xfrm_state *x)
{
	struct xfrm_state_offload *xso = &x->xso;

	if (xso->dev)
		xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
}

Project: linux
File: xfrm.h

static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
					     struct sk_buff *skb)
{
}

Project: linux
File: xfrm_state.c

int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
{
	int err = -EINVAL;
	int ret;
	struct xfrm_mgr *km;

	rcu_read_lock();
	list_for_each_entry_rcu(km, &xfrm_km_list, list) {
		if (km->report) {
			ret = km->report(net, proto, sel, addr);
			if (!ret)
				err = ret;
		}
	}
	rcu_read_unlock();
	return err;
}

Project: linux
File: xfrm.h

static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
{
	struct xfrm_state_offload *xso = &x->xso;

	if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn)
		xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x);
}

Project: linux
File: xfrm_state.c

xfrm_dev_state_flush_secctx_check(struct net *net, struct net_device *dev, bool task_valid)
{
	return 0;
}

Project: linux
File: xfrm_state.c

void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid)
{
	struct audit_buffer *audit_buf;

	audit_buf = xfrm_audit_start("SAD-delete");
	if (audit_buf == NULL)
		return;
	xfrm_audit_helper_usrinfo(task_valid, audit_buf);
	xfrm_audit_helper_sainfo(x, audit_buf);
	audit_log_format(audit_buf, " res=%u", result);
	audit_log_end(audit_buf);
}

Project: linux
File: xfrm_state.c

void xfrm_state_free(struct xfrm_state *x)
{
	kmem_cache_free(xfrm_state_cache, x);
}

Project: linux
File: xfrm_user.c

static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
		struct nlattr **attrs)
{
	struct net *net = sock_net(skb->sk);
	struct xfrm_state *x;
	int err = -ESRCH;
	struct km_event c;
	struct xfrm_usersa_id *p = nlmsg_data(nlh);

	x = xfrm_user_state_lookup(net, p, attrs, &err);
	if (x == NULL)
		return err;

	if ((err = security_xfrm_state_delete(x)) != 0)
		goto out;

	if (xfrm_state_kern(x)) {
		err = -EPERM;
		goto out;
	}

	err = xfrm_state_delete(x);

	if (err < 0)
		goto out;

	c.seq = nlh->nlmsg_seq;
	c.portid = nlh->nlmsg_pid;
	c.event = nlh->nlmsg_type;
	km_state_notify(x, &c);

out:
	xfrm_audit_state_delete(x, err ? 0 : 1, true);
	xfrm_state_put(x);
	return err;
}

Project: linux
File: xfrm.h

static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
{
	return ((!s1 && !s2) ||
		(s1 && s2 &&
		 (s1->ctx_sid == s2->ctx_sid) &&
		 (s1->ctx_doi == s2->ctx_doi) &&
		 (s1->ctx_alg == s2->ctx_alg)));
}

Project: linux
File: xfrm_state.c

void xfrm_audit_state_replay(struct xfrm_state *x,
			     struct sk_buff *skb, __be32 net_seq)
{
	struct audit_buffer *audit_buf;
	u32 spi;

	audit_buf = xfrm_audit_start("SA-replayed-pkt");
	if (audit_buf == NULL)
		return;
	xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
	spi = ntohl(x->id.spi);
	audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
			 spi, spi, ntohl(net_seq));
	audit_log_end(audit_buf);
}

Project: linux
File: xfrm.h

static inline void xfrm_states_delete(struct xfrm_state **states, int n)
{
	int i;
	for (i = 0; i < n; i++)
		xfrm_state_delete(*(states + i));
}

Project: linux
File: xfrm.h

static inline void xfrm_states_put(struct xfrm_state **states, int n)
{
	int i;
	for (i = 0; i < n; i++)
		xfrm_state_put(*(states + i));
}

Project: linux
File: xfrm_state.c

void xfrm_state_delete_tunnel(struct xfrm_state *x)
{
	if (x->tunnel) {
		struct xfrm_state *t = x->tunnel;

		if (atomic_read(&t->tunnel_users) == 2)
			xfrm_state_delete(t);
		atomic_dec(&t->tunnel_users);
		xfrm_state_put_sync(t);
		x->tunnel = NULL;
	}
}

Project: linux
File: xfrm.h

static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id)
{
	int ret = 0;

	if (if_id)
		ret = nla_put_u32(skb, XFRMA_IF_ID, if_id);
	return ret;
}

Project: linux
File: xfrm.h

static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
				  int n, unsigned short family)
{
	return -ENOSYS;
}

Project: linux
File: xfrm_user.c

static void __exit xfrm_user_exit(void)
{
	xfrm_unregister_km(&netlink_mgr);
	unregister_pernet_subsys(&xfrm_user_net_ops);
}

Project: linux
File: xfrm_user.c

static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
			     struct nlattr *rta)
{
	struct xfrm_algo_auth *p, *ualg;
	struct xfrm_algo_desc *algo;

	if (!rta)
		return 0;

	ualg = nla_data(rta);

	algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
	if (!algo)
		return -ENOSYS;
	if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
		return -EINVAL;
	*props = algo->desc.sadb_alg_id;

	p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
	if (!p)
		return -ENOMEM;

	strcpy(p->alg_name, algo->name);
	if (!p->alg_trunc_len)
		p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;

	*algpp = p;
	return 0;
}

Project: linux
File: xfrm_state.c

static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig,
					   struct xfrm_encap_tmpl *encap)
{
	struct net *net = xs_net(orig);
	struct xfrm_state *x = xfrm_state_alloc(net);
	if (!x)
		goto out;

	memcpy(&x->id, &orig->id, sizeof(x->id));
	memcpy(&x->sel, &orig->sel, sizeof(x->sel));
	memcpy(&x->lft, &orig->lft, sizeof(x->lft));
	x->props.mode = orig->props.mode;
	x->props.replay_window = orig->props.replay_window;
	x->props.reqid = orig->props.reqid;
	x->props.family = orig->props.family;
	x->props.saddr = orig->props.saddr;

	if (orig->aalg) {
		x->aalg = xfrm_algo_auth_clone(orig->aalg);
		if (!x->aalg)
			goto error;
	}
	x->props.aalgo = orig->props.aalgo;

	if (orig->aead) {
		x->aead = xfrm_algo_aead_clone(orig->aead);
		x->geniv = orig->geniv;
		if (!x->aead)
			goto error;
	}
	if (orig->ealg) {
		x->ealg = xfrm_algo_clone(orig->ealg);
		if (!x->ealg)
			goto error;
	}
	x->props.ealgo = orig->props.ealgo;

	if (orig->calg) {
		x->calg = xfrm_algo_clone(orig->calg);
		if (!x->calg)
			goto error;
	}
	x->props.calgo = orig->props.calgo;

	if (encap || orig->encap) {
		if (encap)
			x->encap = kmemdup(encap, sizeof(*x->encap),
					GFP_KERNEL);
		else
			x->encap = kmemdup(orig->encap, sizeof(*x->encap),
					GFP_KERNEL);

		if (!x->encap)
			goto error;
	}

	if (orig->coaddr) {
		x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
				    GFP_KERNEL);
		if (!x->coaddr)
			goto error;
	}

	if (orig->replay_esn) {
		if (xfrm_replay_clone(x, orig))
			goto error;
	}

	memcpy(&x->mark, &orig->mark, sizeof(x->mark));

	if (xfrm_init_state(x) < 0)
		goto error;

	x->props.flags = orig->props.flags;
	x->props.extra_flags = orig->props.extra_flags;

	x->if_id = orig->if_id;
	x->tfcpad = orig->tfcpad;
	x->replay_maxdiff = orig->replay_maxdiff;
	x->replay_maxage = orig->replay_maxage;
	x->curlft.add_time = orig->curlft.add_time;
	x->km.state = orig->km.state;
	x->km.seq = orig->km.seq;
	x->replay = orig->replay;
	x->preplay = orig->preplay;

	return x;

 error:
	xfrm_state_put(x);
out:
	return NULL;
}

Project: linux
File: xfrm.h

static inline struct audit_buffer *xfrm_audit_start(const char *op)
{
	struct audit_buffer *audit_buf = NULL;

	if (audit_enabled == AUDIT_OFF)
		return NULL;
	audit_buf = audit_log_start(audit_context(), GFP_ATOMIC,
				    AUDIT_MAC_IPSEC_EVENT);
	if (audit_buf == NULL)
		return NULL;
	audit_log_format(audit_buf, "op=%s", op);
	return audit_buf;
}

Project: linux
File: xfrm.h

static inline int xfrm6_init(void)
{
	return 0;
}

Project: linux
File: xfrm6_tunnel.c

static inline unsigned int xfrm6_tunnel_spi_hash_byspi(u32 spi)
{
	return spi % XFRM6_TUNNEL_SPI_BYSPI_HSIZE;
}

Project: linux
File: xfrm_state.c

static void __xfrm_state_bump_genids(struct xfrm_state *xnew)
{
	struct net *net = xs_net(xnew);
	unsigned short family = xnew->props.family;
	u32 reqid = xnew->props.reqid;
	struct xfrm_state *x;
	unsigned int h;
	u32 mark = xnew->mark.v & xnew->mark.m;
	u32 if_id = xnew->if_id;

	h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family);
	hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
		if (x->props.family	== family &&
		    x->props.reqid	== reqid &&
		    x->if_id		== if_id &&
		    (mark & x->mark.m) == x->mark.v &&
		    xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) &&
		    xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family))
			x->genid++;
	}
}

Project: linux
File: xfrm_state.c

void xfrm_state_insert(struct xfrm_state *x)
{
	struct net *net = xs_net(x);

	spin_lock_bh(&net->xfrm.xfrm_state_lock);
	__xfrm_state_bump_genids(x);
	__xfrm_state_insert(x);
	spin_unlock_bh(&net->xfrm.xfrm_state_lock);
}

Project: linux
File: xfrm_state.c

int xfrm_unregister_mode(struct xfrm_mode *mode, int family)
{
	struct xfrm_state_afinfo *afinfo;
	struct xfrm_mode **modemap;
	int err;

	if (unlikely(mode->encap >= XFRM_MODE_MAX))
		return -EINVAL;

	afinfo = xfrm_state_get_afinfo(family);
	if (unlikely(afinfo == NULL))
		return -EAFNOSUPPORT;

	err = -ENOENT;
	modemap = afinfo->mode_map;
	spin_lock_bh(&xfrm_mode_lock);
	if (likely(modemap[mode->encap] == mode)) {
		modemap[mode->encap] = NULL;
		module_put(mode->afinfo->owner);
		err = 0;
	}

	spin_unlock_bh(&xfrm_mode_lock);
	rcu_read_unlock();
	return err;
}

Project: linux
File: xfrm6_tunnel.c

static u32 __xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr)
{
	struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net);
	u32 spi;
	struct xfrm6_tunnel_spi *x6spi;
	int index;

	if (xfrm6_tn->spi < XFRM6_TUNNEL_SPI_MIN ||
	    xfrm6_tn->spi >= XFRM6_TUNNEL_SPI_MAX)
		xfrm6_tn->spi = XFRM6_TUNNEL_SPI_MIN;
	else
		xfrm6_tn->spi++;

	for (spi = xfrm6_tn->spi; spi <= XFRM6_TUNNEL_SPI_MAX; spi++) {
		index = __xfrm6_tunnel_spi_check(net, spi);
		if (index >= 0)
			goto alloc_spi;

		if (spi == XFRM6_TUNNEL_SPI_MAX)
			break;
	}
	for (spi = XFRM6_TUNNEL_SPI_MIN; spi < xfrm6_tn->spi; spi++) {
		index = __xfrm6_tunnel_spi_check(net, spi);
		if (index >= 0)
			goto alloc_spi;
	}
	spi = 0;
	goto out;
alloc_spi:
	xfrm6_tn->spi = spi;
	x6spi = kmem_cache_alloc(xfrm6_tunnel_spi_kmem, GFP_ATOMIC);
	if (!x6spi)
		goto out;

	memcpy(&x6spi->addr, saddr, sizeof(x6spi->addr));
	x6spi->spi = spi;
	refcount_set(&x6spi->refcnt, 1);

	hlist_add_head_rcu(&x6spi->list_byspi, &xfrm6_tn->spi_byspi[index]);

	index = xfrm6_tunnel_spi_hash_byaddr(saddr);
	hlist_add_head_rcu(&x6spi->list_byaddr, &xfrm6_tn->spi_byaddr[index]);
out:
	return spi;
}

Project: linux
File: xfrm_user.c

static int xfrm_dump_policy_done(struct netlink_callback *cb)
{
	struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
	struct net *net = sock_net(cb->skb->sk);

	xfrm_policy_walk_done(walk, net);
	return 0;
}

Project: linux
File: xfrm_user.c

static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
				       u32 pid, unsigned int group)
{
	struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);

	if (!nlsk) {
		kfree_skb(skb);
		return -EPIPE;
	}

	return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
}

Project: linux
File: xfrm_state.c

static void xfrm_replay_timer_handler(struct timer_list *t)
{
	struct xfrm_state *x = from_timer(x, t, rtimer);

	spin_lock(&x->lock);

	if (x->km.state == XFRM_STATE_VALID) {
		if (xfrm_aevent_is_on(xs_net(x)))
			x->repl->notify(x, XFRM_REPLAY_TIMEOUT);
		else
			x->xflags |= XFRM_TIME_DEFER;
	}

	spin_unlock(&x->lock);
}

Project: linux
File: xfrm_state.c

int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
{
	int err = 0, family = afinfo->family;

	if (WARN_ON(family >= NPROTO))
		return -EAFNOSUPPORT;

	spin_lock_bh(&xfrm_state_afinfo_lock);
	if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
		if (rcu_access_pointer(xfrm_state_afinfo[family]) != afinfo)
			err = -EINVAL;
		else
			RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL);
	}
	spin_unlock_bh(&xfrm_state_afinfo_lock);
	synchronize_rcu();
	return err;
}

Project: linux
File: xfrm.h

static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }

Project: linux
File: xfrm_user.c

static int verify_aead(struct nlattr **attrs)
{
	struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
	struct xfrm_algo_aead *algp;

	if (!rt)
		return 0;

	algp = nla_data(rt);
	if (nla_len(rt) < (int)aead_len(algp))
		return -EINVAL;

	algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
	return 0;
}

Project: linux
File: xfrm.h

static inline struct net *xs_net(struct xfrm_state *x)
{
	return read_pnet(&x->xs_net);
}

Project: linux
File: xfrm_state.c

int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload)
{
	struct xfrm_state_afinfo *afinfo;
	struct xfrm_mode *inner_mode;
	int family = x->props.family;
	int err;

	err = -EAFNOSUPPORT;
	afinfo = xfrm_state_get_afinfo(family);
	if (!afinfo)
		goto error;

	err = 0;
	if (afinfo->init_flags)
		err = afinfo->init_flags(x);

	rcu_read_unlock();

	if (err)
		goto error;

	err = -EPROTONOSUPPORT;

	if (x->sel.family != AF_UNSPEC) {
		inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
		if (inner_mode == NULL)
			goto error;

		if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
		    family != x->sel.family) {
			xfrm_put_mode(inner_mode);
			goto error;
		}

		x->inner_mode = inner_mode;
	} else {
		struct xfrm_mode *inner_mode_iaf;
		int iafamily = AF_INET;

		inner_mode = xfrm_get_mode(x->props.mode, x->props.family);
		if (inner_mode == NULL)
			goto error;

		if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) {
			xfrm_put_mode(inner_mode);
			goto error;
		}
		x->inner_mode = inner_mode;

		if (x->props.family == AF_INET)
			iafamily = AF_INET6;

		inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily);
		if (inner_mode_iaf) {
			if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
				x->inner_mode_iaf = inner_mode_iaf;
			else
				xfrm_put_mode(inner_mode_iaf);
		}
	}

	x->type = xfrm_get_type(x->id.proto, family);
	if (x->type == NULL)
		goto error;

	x->type_offload = xfrm_get_type_offload(x->id.proto, family, offload);

	err = x->type->init_state(x);
	if (err)
		goto error;

	x->outer_mode = xfrm_get_mode(x->props.mode, family);
	if (x->outer_mode == NULL) {
		err = -EPROTONOSUPPORT;
		goto error;
	}

	if (init_replay) {
		err = xfrm_init_replay(x);
		if (err)
			goto error;
	}

error:
	return err;
}

Project: linux
File: xfrm_user.c

static int attach_crypt(struct xfrm_state *x, struct nlattr *rta)
{
	struct xfrm_algo *p, *ualg;
	struct xfrm_algo_desc *algo;

	if (!rta)
		return 0;

	ualg = nla_data(rta);

	algo = xfrm_ealg_get_byname(ualg->alg_name, 1);
	if (!algo)
		return -ENOSYS;
	x->props.ealgo = algo->desc.sadb_alg_id;

	p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
	if (!p)
		return -ENOMEM;

	strcpy(p->alg_name, algo->name);
	x->ealg = p;
	x->geniv = algo->uinfo.encr.geniv;
	return 0;
}

Project: linux
File: xfrm_user.c

static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
			     struct xfrm_policy *xp)
{
	struct net *net = xs_net(x);
	struct sk_buff *skb;
	int err;

	skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
	if (skb == NULL)
		return -ENOMEM;

	err = build_acquire(skb, x, xt, xp);
	BUG_ON(err < 0);

	return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
}

Project: linux
File: xfrm.h

static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
{
	return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
}

Project: linux
File: xfrm.h

static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
{
	struct net *net = dev_net(skb->dev);

	return	!net->xfrm.policy_count[XFRM_POLICY_OUT] ||
		(skb_dst(skb)->flags & DST_NOXFRM) ||
		__xfrm_route_forward(skb, family);
}

Project: linux
File: xfrm.h

static inline void xfrm_dev_resume(struct sk_buff *skb)
{
}

Project: linux
File: xfrm6_tunnel.c

static inline struct xfrm6_tunnel_net *xfrm6_tunnel_pernet(struct net *net)
{
	return net_generic(net, xfrm6_tunnel_net_id);
}

Project: linux
File: xfrm.h

static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
					     struct sk_buff *skb)
{
	return 1;
}

Project: linux
File: xfrm.h

static inline bool xfrm_id_proto_valid(u8 proto)
{
	switch (proto) {
	case IPPROTO_AH:
	case IPPROTO_ESP:
	case IPPROTO_COMP:
#if IS_ENABLED(CONFIG_IPV6)
	case IPPROTO_ROUTING:
	case IPPROTO_DSTOPTS:
#endif
		return true;
	default:
		return false;
	}
}

Project: linux
File: xfrm.h

xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
{
	switch (family) {
	case AF_INET:
		return addr->a4 == 0;
	case AF_INET6:
		return ipv6_addr_any(&addr->in6);
	}
	return 0;
}

Project: linux
File: xfrm_user.c

static int xfrm_notify_policy_flush(const struct km_event *c)
{
	struct net *net = c->net;
	struct nlmsghdr *nlh;
	struct sk_buff *skb;
	int err;

	skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
	if (skb == NULL)
		return -ENOMEM;

	nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
	err = -EMSGSIZE;
	if (nlh == NULL)
		goto out_free_skb;
	err = copy_to_user_policy_type(c->data.type, skb);
	if (err)
		goto out_free_skb;

	nlmsg_end(skb, nlh);

	return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);

out_free_skb:
	kfree_skb(skb);
	return err;
}

Project: linux
File: xfrm_user.c

static struct xfrm_state *xfrm_state_construct(struct net *net,
					       struct xfrm_usersa_info *p,
					       struct nlattr **attrs,
					       int *errp)
{
	struct xfrm_state *x = xfrm_state_alloc(net);
	int err = -ENOMEM;

	if (!x)
		goto error_no_put;

	copy_from_user_state(x, p);

	if (attrs[XFRMA_SA_EXTRA_FLAGS])
		x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);

	if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD])))
		goto error;
	if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
				     attrs[XFRMA_ALG_AUTH_TRUNC])))
		goto error;
	if (!x->props.aalgo) {
		if ((err = attach_auth(&x->aalg, &x->props.aalgo,
				       attrs[XFRMA_ALG_AUTH])))
			goto error;
	}
	if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT])))
		goto error;
	if ((err = attach_one_algo(&x->calg, &x->props.calgo,
				   xfrm_calg_get_byname,
				   attrs[XFRMA_ALG_COMP])))
		goto error;

	if (attrs[XFRMA_ENCAP]) {
		x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
				   sizeof(*x->encap), GFP_KERNEL);
		if (x->encap == NULL)
			goto error;
	}

	if (attrs[XFRMA_TFCPAD])
		x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);

	if (attrs[XFRMA_COADDR]) {
		x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
				    sizeof(*x->coaddr), GFP_KERNEL);
		if (x->coaddr == NULL)
			goto error;
	}

	xfrm_mark_get(attrs, &x->mark);

	xfrm_smark_init(attrs, &x->props.smark);

	if (attrs[XFRMA_IF_ID])
		x->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);

	err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV]);
	if (err)
		goto error;

	if (attrs[XFRMA_SEC_CTX]) {
		err = security_xfrm_state_alloc(x,
						nla_data(attrs[XFRMA_SEC_CTX]));
		if (err)
			goto error;
	}

	if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
					       attrs[XFRMA_REPLAY_ESN_VAL])))
		goto error;

	x->km.seq = p->seq;
	x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
	/* sysctl_xfrm_aevent_etime is in 100ms units */
	x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;

	if ((err = xfrm_init_replay(x)))
		goto error;

	/* override default values from above */
	xfrm_update_ae_params(x, attrs, 0);

	/* configure the hardware if offload is requested */
	if (attrs[XFRMA_OFFLOAD_DEV]) {
		err = xfrm_dev_state_add(net, x,
					 nla_data(attrs[XFRMA_OFFLOAD_DEV]));
		if (err)
			goto error;
	}

	return x;

error:
	x->km.state = XFRM_STATE_DEAD;
	xfrm_state_put(x);
error_no_put:
	*errp = err;
	return NULL;
}

Project: linux
File: xfrm_user.c

static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
{
	struct net *net = xs_net(x);
	struct sk_buff *skb;

	skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
	if (skb == NULL)
		return -ENOMEM;

	if (build_expire(skb, x, c) < 0) {
		kfree_skb(skb);
		return -EMSGSIZE;
	}

	return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
}

Project: linux
File: xfrm.h

static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
{
 	/* should not happen */
 	kfree_skb(skb);
	return 0;
}

Project: linux
File: xfrm.h

static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
				     struct sk_buff *skb, u8 proto)
{
}

Project: linux
File: xfrm.h

static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
				      u16 family)
{
}

Project: linux
File: xfrm.h

__xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
{
	return	(tmpl->saddr.a4 &&
		 tmpl->saddr.a4 != x->props.saddr.a4);
}

Project: linux
File: xfrm_user.c

static inline unsigned int xfrm_mapping_msgsize(void)
{
	return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
}

Project: linux
File: xfrm_user.c

static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
{
	u16 prev_family;
	int i;

	if (nr > XFRM_MAX_DEPTH)
		return -EINVAL;

	prev_family = family;

	for (i = 0; i < nr; i++) {
		/* We never validated the ut->family value, so many
		 * applications simply leave it at zero.  The check was
		 * never made and ut->family was ignored because all
		 * templates could be assumed to have the same family as
		 * the policy itself.  Now that we will have ipv4-in-ipv6
		 * and ipv6-in-ipv4 tunnels, this is no longer true.
		 */
		if (!ut[i].family)
			ut[i].family = family;

		switch (ut[i].mode) {
		case XFRM_MODE_TUNNEL:
		case XFRM_MODE_BEET:
			break;
		default:
			if (ut[i].family != prev_family)
				return -EINVAL;
			break;
		}
		if (ut[i].mode >= XFRM_MODE_MAX)
			return -EINVAL;

		prev_family = ut[i].family;

		switch (ut[i].family) {
		case AF_INET:
			break;
#if IS_ENABLED(CONFIG_IPV6)
		case AF_INET6:
			break;
#endif
		default:
			return -EINVAL;
		}

		if (!xfrm_id_proto_valid(ut[i].id.proto))
			return -EINVAL;
	}

	return 0;
}

Project: linux
File: xfrm.h

static inline int xfrm4_route_forward(struct sk_buff *skb)
{
	return xfrm_route_forward(skb, AF_INET);
}

Project: linux
File: xfrm_user.c

static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
{
	struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
	int i;

	if (xp->xfrm_nr == 0)
		return 0;

	for (i = 0; i < xp->xfrm_nr; i++) {
		struct xfrm_user_tmpl *up = &vec[i];
		struct xfrm_tmpl *kp = &xp->xfrm_vec[i];

		memset(up, 0, sizeof(*up));
		memcpy(&up->id, &kp->id, sizeof(up->id));
		up->family = kp->encap_family;
		memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
		up->reqid = kp->reqid;
		up->mode = kp->mode;
		up->share = kp->share;
		up->optional = kp->optional;
		up->aalgos = kp->aalgos;
		up->ealgos = kp->ealgos;
		up->calgos = kp->calgos;
	}

	return nla_put(skb, XFRMA_TMPL,
		       sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
}

Project: linux
File: xfrm_state.c

int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
{
	int err = 0;

	if (WARN_ON(afinfo->family >= NPROTO))
		return -EAFNOSUPPORT;

	spin_lock_bh(&xfrm_state_afinfo_lock);
	if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
		err = -EEXIST;
	else
		rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo);
	spin_unlock_bh(&xfrm_state_afinfo_lock);
	return err;
}

Project: linux
File: xfrm_state.c

xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr,
	      __be32 spi, u8 proto, unsigned short family)
{
	return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask);
}

Project: linux
File: xfrm_state.c

void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
{
	struct xfrm_mgr *km;

	rcu_read_lock();
	list_for_each_entry_rcu(km, &xfrm_km_list, list)
		if (km->notify_policy)
			km->notify_policy(xp, dir, c);
	rcu_read_unlock();
}

Project: linux
File: xfrm.h

static inline void xfrm_state_put_sync(struct xfrm_state *x)
{
	if (refcount_dec_and_test(&x->refcnt))
		__xfrm_state_destroy(x, true);
}

Project: linux
File: xfrm.h

static inline void xfrm_dev_state_delete(struct xfrm_state *x)
{
}

Project: linux
File: xfrm_state.c

xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
	       unsigned short family, struct net *net)
{
	int i;
	int err = 0;
	struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
	if (!afinfo)
		return -EAFNOSUPPORT;

	spin_lock_bh(&net->xfrm.xfrm_state_lock); /*FIXME*/
	if (afinfo->tmpl_sort)
		err = afinfo->tmpl_sort(dst, src, n);
	else
		for (i = 0; i < n; i++)
			dst[i] = src[i];
	spin_unlock_bh(&net->xfrm.xfrm_state_lock);
	rcu_read_unlock();
	return err;
}

Project: linux
File: xfrm.h

static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
{
	return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
}

Project: linux
File: xfrm_user.c

static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
			     struct netlink_ext_ack *extack)
{
	struct net *net = sock_net(skb->sk);
	struct nlattr *attrs[XFRMA_MAX+1];
	const struct xfrm_link *link;
	int type, err;

	if (in_compat_syscall())
		return -EOPNOTSUPP;

	type = nlh->nlmsg_type;
	if (type > XFRM_MSG_MAX)
		return -EINVAL;

	type -= XFRM_MSG_BASE;
	link = &xfrm_dispatch[type];

	/* All operations require privileges, even GET */
	if (!netlink_net_capable(skb, CAP_NET_ADMIN))
		return -EPERM;

	if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
	     type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
	    (nlh->nlmsg_flags & NLM_F_DUMP)) {
		if (link->dump == NULL)
			return -EINVAL;

		{
			struct netlink_dump_control c = {
				.start = link->start,
				.dump = link->dump,
				.done = link->done,
			};
			return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
		}
	}

	err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs,
			  link->nla_max ? : XFRMA_MAX,
			  link->nla_pol ? : xfrma_policy, extack);
	if (err < 0)
		return err;

	if (link->doit == NULL)
		return -EINVAL;

	return link->doit(skb, nlh, attrs);
}

Project: linux
File: xfrm_user.c

static int xfrm_dump_sa_done(struct netlink_callback *cb)
{
	struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
	struct sock *sk = cb->skb->sk;
	struct net *net = sock_net(sk);

	if (cb->args[0])
		xfrm_state_walk_done(walk, net);
	return 0;
}

Project: linux
File: xfrm.h

static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
					     struct sk_buff *skb)
{
	return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
}

Project: linux
File: xfrm_state.c

int verify_spi_info(u8 proto, u32 min, u32 max)
{
	switch (proto) {
	case IPPROTO_AH:
	case IPPROTO_ESP:
		break;

	case IPPROTO_COMP:
		/* IPCOMP spi is 16-bits. */
		if (max >= 0x10000)
			return -EINVAL;
		break;

	default:
		return -EINVAL;
	}

	if (min > max)
		return -EINVAL;

	return 0;
}

Project: linux
File: xfrm.h

xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
{
	switch (family) {
	case AF_INET:
		return __xfrm4_state_addr_cmp(tmpl, x);
	case AF_INET6:
		return __xfrm6_state_addr_cmp(tmpl, x);
	}
	return !0;
}

Project: linux
File: xfrm.h

static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
					      struct flowi *fl,
					      unsigned int family)
{
	return __xfrm_decode_session(skb, fl, family, 1);
}

Project: linux
File: xfrm.h

static inline void xfrm_sk_free_policy(struct sock *sk) {}

Project: linux
File: xfrm6_tunnel.c

static int __net_init xfrm6_tunnel_net_init(struct net *net)
{
	struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net);
	unsigned int i;

	for (i = 0; i < XFRM6_TUNNEL_SPI_BYADDR_HSIZE; i++)
		INIT_HLIST_HEAD(&xfrm6_tn->spi_byaddr[i]);
	for (i = 0; i < XFRM6_TUNNEL_SPI_BYSPI_HSIZE; i++)
		INIT_HLIST_HEAD(&xfrm6_tn->spi_byspi[i]);
	xfrm6_tn->spi = 0;

	return 0;
}

Project: linux
File: xfrm.h

static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
					    bool task_valid)
{
}

Project: linux
File: xfrm.h

static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
{
	sk->sk_policy[0] = NULL;
	sk->sk_policy[1] = NULL;
	if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
		return __xfrm_sk_clone_policy(sk, osk);
	return 0;
}

Project: linux
File: xfrm.h

static inline void xfrm_dev_backlog(struct softnet_data *sd)
{
}

Project: linux
File: xfrm6_tunnel.c

static void x6spi_destroy_rcu(struct rcu_head *head)
{
	kmem_cache_free(xfrm6_tunnel_spi_kmem,
			container_of(head, struct xfrm6_tunnel_spi, rcu_head));
}

Project: linux
File: xfrm_state.c

xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid,
	      u32 if_id, u8 proto, const xfrm_address_t *daddr,
	      const xfrm_address_t *saddr, int create, unsigned short family)
{
	struct xfrm_state *x;

	spin_lock_bh(&net->xfrm.xfrm_state_lock);
	x = __find_acq_core(net, mark, family, mode, reqid, if_id, proto, daddr, saddr, create);
	spin_unlock_bh(&net->xfrm.xfrm_state_lock);

	return x;
}

Project: linux
File: xfrm_user.c

static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
{
	struct nlattr *rt = attrs[type];
	struct xfrm_algo *algp;

	if (!rt)
		return 0;

	algp = nla_data(rt);
	if (nla_len(rt) < (int)xfrm_alg_len(algp))
		return -EINVAL;

	switch (type) {
	case XFRMA_ALG_AUTH:
	case XFRMA_ALG_CRYPT:
	case XFRMA_ALG_COMP:
		break;

	default:
		return -EINVAL;
	}

	algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
	return 0;
}

Project: linux
File: xfrm_state.c

static inline bool xfrm_state_hold_rcu(struct xfrm_state __rcu *x)
{
	return refcount_inc_not_zero(&x->refcnt);
}

Project: linux
File: xfrm.h

static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
{
	return kmemdup(orig, aead_len(orig), GFP_KERNEL);
}

Project: linux
File: xfrm_user.c

static inline unsigned int xfrm_sadinfo_msgsize(void)
{
	return NLMSG_ALIGN(4)
	       + nla_total_size(sizeof(struct xfrmu_sadhinfo))
	       + nla_total_size(4); /* XFRMA_SAD_CNT */
}

Project: linux
File: xfrm.h

__be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
{
	__be16 port;
	switch(fl->flowi_proto) {
	case IPPROTO_TCP:
	case IPPROTO_UDP:
	case IPPROTO_UDPLITE:
	case IPPROTO_SCTP:
		port = uli->ports.sport;
		break;
	case IPPROTO_ICMP:
	case IPPROTO_ICMPV6:
		port = htons(uli->icmpt.type);
		break;
	case IPPROTO_MH:
		port = htons(uli->mht.type);
		break;
	case IPPROTO_GRE:
		port = htons(ntohl(uli->gre_key) >> 16);
		break;
	default:
		port = 0;	/*XXX*/
	}
	return port;
}

Project: linux
File: xfrm_state.c

static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark,
						     const xfrm_address_t *daddr,
						     const xfrm_address_t *saddr,
						     u8 proto, unsigned short family)
{
	unsigned int h = xfrm_src_hash(net, daddr, saddr, family);
	struct xfrm_state *x;

	hlist_for_each_entry_rcu(x, net->xfrm.state_bysrc + h, bysrc) {
		if (x->props.family != family ||
		    x->id.proto     != proto ||
		    !xfrm_addr_equal(&x->id.daddr, daddr, family) ||
		    !xfrm_addr_equal(&x->props.saddr, saddr, family))
			continue;

		if ((mark & x->mark.m) != x->mark.v)
			continue;
		if (!xfrm_state_hold_rcu(x))
			continue;
		return x;
	}

	return NULL;
}

Project: linux
File: xfrm.h

static inline struct net *xp_net(const struct xfrm_policy *xp)
{
	return read_pnet(&xp->xp_net);
}

Project: linux
File: xfrm6_tunnel.c

static struct xfrm6_tunnel_spi *__xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr)
{
	struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net);
	struct xfrm6_tunnel_spi *x6spi;

	hlist_for_each_entry_rcu(x6spi,
			     &xfrm6_tn->spi_byaddr[xfrm6_tunnel_spi_hash_byaddr(saddr)],
			     list_byaddr) {
		if (xfrm6_addr_equal(&x6spi->addr, saddr))
			return x6spi;
	}

	return NULL;
}

Project: linux
File: xfrm_user.c

static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
			    struct nlattr **attrs)
{
	struct net *net = sock_net(skb->sk);
	struct xfrmu_spdhthresh *thresh4 = NULL;
	struct xfrmu_spdhthresh *thresh6 = NULL;

	/* selector prefixlen thresholds to hash policies */
	if (attrs[XFRMA_SPD_IPV4_HTHRESH]) {
		struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH];

		if (nla_len(rta) < sizeof(*thresh4))
			return -EINVAL;
		thresh4 = nla_data(rta);
		if (thresh4->lbits > 32 || thresh4->rbits > 32)
			return -EINVAL;
	}
	if (attrs[XFRMA_SPD_IPV6_HTHRESH]) {
		struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH];

		if (nla_len(rta) < sizeof(*thresh6))
			return -EINVAL;
		thresh6 = nla_data(rta);
		if (thresh6->lbits > 128 || thresh6->rbits > 128)
			return -EINVAL;
	}

	if (thresh4 || thresh6) {
		write_seqlock(&net->xfrm.policy_hthresh.lock);
		if (thresh4) {
			net->xfrm.policy_hthresh.lbits4 = thresh4->lbits;
			net->xfrm.policy_hthresh.rbits4 = thresh4->rbits;
		}
		if (thresh6) {
			net->xfrm.policy_hthresh.lbits6 = thresh6->lbits;
			net->xfrm.policy_hthresh.rbits6 = thresh6->rbits;
		}
		write_sequnlock(&net->xfrm.policy_hthresh.lock);

		xfrm_policy_hash_rebuild(net);
	}

	return 0;
}

Project: linux
File: xfrm_state.c

void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
			       __be32 net_spi, __be32 net_seq)
{
	struct audit_buffer *audit_buf;
	u32 spi;

	audit_buf = xfrm_audit_start("SA-notfound");
	if (audit_buf == NULL)
		return;
	xfrm_audit_helper_pktinfo(skb, family, audit_buf);
	spi = ntohl(net_spi);
	audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
			 spi, spi, ntohl(net_seq));
	audit_log_end(audit_buf);
}

Project: linux
File: xfrm_user.c

static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
		struct nlattr **attrs)
{
	struct net *net = sock_net(skb->sk);
	struct sk_buff *r_skb;
	u32 *flags = nlmsg_data(nlh);
	u32 sportid = NETLINK_CB(skb).portid;
	u32 seq = nlh->nlmsg_seq;
	int err;

	r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
	if (r_skb == NULL)
		return -ENOMEM;

	err = build_spdinfo(r_skb, net, sportid, seq, *flags);
	BUG_ON(err < 0);

	return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
}

Project: linux
File: xfrm_user.c

static inline unsigned int xfrm_expire_msgsize(void)
{
	return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
	       + nla_total_size(sizeof(struct xfrm_mark));
}

Project: linux
File: xfrm.h

static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
					bool task_valid)
{
}

Project: linux
File: xfrm.h

static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }

Project: linux
File: xfrm_user.c

static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
		struct nlattr **attrs)
{
	struct net *net = sock_net(skb->sk);
	struct km_event c;
	u8 type = XFRM_POLICY_TYPE_MAIN;
	int err;

	err = copy_from_user_policy_type(&type, attrs);
	if (err)
		return err;

	err = xfrm_policy_flush(net, type, true);
	if (err) {
		if (err == -ESRCH) /* empty table */
			return 0;
		return err;
	}

	c.data.type = type;
	c.event = nlh->nlmsg_type;
	c.seq = nlh->nlmsg_seq;
	c.portid = nlh->nlmsg_pid;
	c.net = net;
	km_policy_notify(NULL, 0, &c);
	return 0;
}

Project: linux
File: xfrm_state.c

static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
{
	struct xfrm_state_afinfo *afinfo;
	const struct xfrm_type **typemap;
	const struct xfrm_type *type;
	int modload_attempted = 0;

retry:
	afinfo = xfrm_state_get_afinfo(family);
	if (unlikely(afinfo == NULL))
		return NULL;
	typemap = afinfo->type_map;

	type = READ_ONCE(typemap[proto]);
	if (unlikely(type && !try_module_get(type->owner)))
		type = NULL;

	rcu_read_unlock();

	if (!type && !modload_attempted) {
		request_module("xfrm-type-%d-%d", family, proto);
		modload_attempted = 1;
		goto retry;
	}

	return type;
}

Project: linux
File: xfrm_state.c

struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
{
	struct xfrm_state_afinfo *afinfo;
	if (unlikely(family >= NPROTO))
		return NULL;
	rcu_read_lock();
	afinfo = rcu_dereference(xfrm_state_afinfo[family]);
	if (unlikely(!afinfo))
		rcu_read_unlock();
	return afinfo;
}

Project: linux
File: xfrm.h

static inline void xfrm_sk_free_policy(struct sock *sk)
{
	struct xfrm_policy *pol;

	pol = rcu_dereference_protected(sk->sk_policy[0], 1);
	if (unlikely(pol != NULL)) {
		xfrm_policy_delete(pol, XFRM_POLICY_MAX);
		sk->sk_policy[0] = NULL;
	}
	pol = rcu_dereference_protected(sk->sk_policy[1], 1);
	if (unlikely(pol != NULL)) {
		xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
		sk->sk_policy[1] = NULL;
	}
}

Project: linux
File: xfrm_state.c

xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
		const struct flowi *fl, struct xfrm_tmpl *tmpl,
		struct xfrm_policy *pol, int *err,
		unsigned short family, u32 if_id)
{
	static xfrm_address_t saddr_wildcard = { };
	struct net *net = xp_net(pol);
	unsigned int h, h_wildcard;
	struct xfrm_state *x, *x0, *to_put;
	int acquire_in_progress = 0;
	int error = 0;
	struct xfrm_state *best = NULL;
	u32 mark = pol->mark.v & pol->mark.m;
	unsigned short encap_family = tmpl->encap_family;
	unsigned int sequence;
	struct km_event c;

	to_put = NULL;

	sequence = read_seqcount_begin(&xfrm_state_hash_generation);

	rcu_read_lock();
	h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);
	hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h, bydst) {
		if (x->props.family == encap_family &&
		    x->props.reqid == tmpl->reqid &&
		    (mark & x->mark.m) == x->mark.v &&
		    x->if_id == if_id &&
		    !(x->props.flags & XFRM_STATE_WILDRECV) &&
		    xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
		    tmpl->mode == x->props.mode &&
		    tmpl->id.proto == x->id.proto &&
		    (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
			xfrm_state_look_at(pol, x, fl, encap_family,
					   &best, &acquire_in_progress, &error);
	}
	if (best || acquire_in_progress)
		goto found;

	h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family);
	hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h_wildcard, bydst) {
		if (x->props.family == encap_family &&
		    x->props.reqid == tmpl->reqid &&
		    (mark & x->mark.m) == x->mark.v &&
		    x->if_id == if_id &&
		    !(x->props.flags & XFRM_STATE_WILDRECV) &&
		    xfrm_addr_equal(&x->id.daddr, daddr, encap_family) &&
		    tmpl->mode == x->props.mode &&
		    tmpl->id.proto == x->id.proto &&
		    (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
			xfrm_state_look_at(pol, x, fl, encap_family,
					   &best, &acquire_in_progress, &error);
	}

found:
	x = best;
	if (!x && !error && !acquire_in_progress) {
		if (tmpl->id.spi &&
		    (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi,
					      tmpl->id.proto, encap_family)) != NULL) {
			to_put = x0;
			error = -EEXIST;
			goto out;
		}

		c.net = net;
		/* If the KMs have no listeners (yet...), avoid allocating an SA
		 * for each and every packet - garbage collection might not
		 * handle the flood.
		 */
		if (!km_is_alive(&c)) {
			error = -ESRCH;
			goto out;
		}

		x = xfrm_state_alloc(net);
		if (x == NULL) {
			error = -ENOMEM;
			goto out;
		}
		/* Initialize temporary state matching only
		 * to current session. */
		xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family);
		memcpy(&x->mark, &pol->mark, sizeof(x->mark));
		x->if_id = if_id;

		error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid);
		if (error) {
			x->km.state = XFRM_STATE_DEAD;
			to_put = x;
			x = NULL;
			goto out;
		}

		if (km_query(x, tmpl, pol) == 0) {
			spin_lock_bh(&net->xfrm.xfrm_state_lock);
			x->km.state = XFRM_STATE_ACQ;
			list_add(&x->km.all, &net->xfrm.state_all);
			hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h);
			h = xfrm_src_hash(net, daddr, saddr, encap_family);
			hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h);
			if (x->id.spi) {
				h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family);
				hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h);
			}
			x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
			tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
			net->xfrm.state_num++;
			xfrm_hash_grow_check(net, x->bydst.next != NULL);
			spin_unlock_bh(&net->xfrm.xfrm_state_lock);
		} else {
			x->km.state = XFRM_STATE_DEAD;
			to_put = x;
			x = NULL;
			error = -ESRCH;
		}
	}
out:
	if (x) {
		if (!xfrm_state_hold_rcu(x)) {
			*err = -EAGAIN;
			x = NULL;
		}
	} else {
		*err = acquire_in_progress ? -EAGAIN : error;
	}
	rcu_read_unlock();
	if (to_put)
		xfrm_state_put(to_put);

	if (read_seqcount_retry(&xfrm_state_hash_generation, sequence)) {
		*err = -EAGAIN;
		if (x) {
			xfrm_state_put(x);
			x = NULL;
		}
	}

	return x;
}

Project: linux
File: xfrm.h

static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
{
 	return -ENOPROTOOPT;
}

Project: linux
File: xfrm_state.c

int xfrm_register_type_offload(const struct xfrm_type_offload *type,
			       unsigned short family)
{
	struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
	const struct xfrm_type_offload **typemap;
	int err = 0;

	if (unlikely(afinfo == NULL))
		return -EAFNOSUPPORT;
	typemap = afinfo->type_offload_map;
	spin_lock_bh(&xfrm_type_offload_lock);

	if (likely(typemap[type->proto] == NULL))
		typemap[type->proto] = type;
	else
		err = -EEXIST;
	spin_unlock_bh(&xfrm_type_offload_lock);
	rcu_read_unlock();
	return err;
}

Project: linux
File: xfrm.h

static inline int xfrm_aevent_is_on(struct net *net)
{
	struct sock *nlsk;
	int ret = 0;

	rcu_read_lock();
	nlsk = rcu_dereference(net->xfrm.nlsk);
	if (nlsk)
		ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
	rcu_read_unlock();
	return ret;
}

Project: linux
File: xfrm6_tunnel.c

static int xfrm6_tunnel_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
			    u8 type, u8 code, int offset, __be32 info)
{
	/* xfrm6_tunnel native err handling */
	switch (type) {
	case ICMPV6_DEST_UNREACH:
		switch (code) {
		case ICMPV6_NOROUTE:
		case ICMPV6_ADM_PROHIBITED:
		case ICMPV6_NOT_NEIGHBOUR:
		case ICMPV6_ADDR_UNREACH:
		case ICMPV6_PORT_UNREACH:
		default:
			break;
		}
		break;
	case ICMPV6_PKT_TOOBIG:
		break;
	case ICMPV6_TIME_EXCEED:
		switch (code) {
		case ICMPV6_EXC_HOPLIMIT:
			break;
		case ICMPV6_EXC_FRAGTIME:
		default:
			break;
		}
		break;
	case ICMPV6_PARAMPROB:
		switch (code) {
		case ICMPV6_HDR_FIELD: break;
		case ICMPV6_UNK_NEXTHDR: break;
		case ICMPV6_UNK_OPTION: break;
		}
		break;
	default:
		break;
	}

	return 0;
}

Project: linux
File: xfrm.h

static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
{
	return 1;
}

Project: linux
File: xfrm_user.c

static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
{
	struct net *net = xs_net(x);
	struct xfrm_usersa_info *p;
	struct xfrm_usersa_id *id;
	struct nlmsghdr *nlh;
	struct sk_buff *skb;
	unsigned int len = xfrm_sa_len(x);
	unsigned int headlen;
	int err;

	headlen = sizeof(*p);
	if (c->event == XFRM_MSG_DELSA) {
		len += nla_total_size(headlen);
		headlen = sizeof(*id);
		len += nla_total_size(sizeof(struct xfrm_mark));
	}
	len += NLMSG_ALIGN(headlen);

	skb = nlmsg_new(len, GFP_ATOMIC);
	if (skb == NULL)
		return -ENOMEM;

	nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
	err = -EMSGSIZE;
	if (nlh == NULL)
		goto out_free_skb;

	p = nlmsg_data(nlh);
	if (c->event == XFRM_MSG_DELSA) {
		struct nlattr *attr;

		id = nlmsg_data(nlh);
		memset(id, 0, sizeof(*id));
		memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
		id->spi = x->id.spi;
		id->family = x->props.family;
		id->proto = x->id.proto;

		attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
		err = -EMSGSIZE;
		if (attr == NULL)
			goto out_free_skb;

		p = nla_data(attr);
	}
	err = copy_to_user_state_extra(x, p, skb);
	if (err)
		goto out_free_skb;

	nlmsg_end(skb, nlh);

	return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);

out_free_skb:
	kfree_skb(skb);
	return err;
}

Project: linux
File: xfrm_user.c

static inline unsigned int xfrm_polexpire_msgsize(struct xfrm_policy *xp)
{
	return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
	       + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
	       + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
	       + nla_total_size(sizeof(struct xfrm_mark))
	       + userpolicy_type_attrsize();
}

Project: linux
File: af_key.c

static int pfkey_create(struct net *net, struct socket *sock, int protocol,
			int kern)
{
	struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
	struct sock *sk;
	struct pfkey_sock *pfk;
	int err;

	if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
		return -EPERM;
	if (sock->type != SOCK_RAW)
		return -ESOCKTNOSUPPORT;
	if (protocol != PF_KEY_V2)
		return -EPROTONOSUPPORT;

	err = -ENOMEM;
	sk = sk_alloc(net, PF_KEY, GFP_KERNEL, &key_proto, kern);
	if (sk == NULL)
		goto out;

	pfk = pfkey_sk(sk);
	mutex_init(&pfk->dump_lock);

	sock->ops = &pfkey_ops;
	sock_init_data(sock, sk);

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

	atomic_inc(&net_pfkey->socks_nr);

	pfkey_insert(sk);

	return 0;
out:
	return err;
}

Project: linux
File: xfrm6_tunnel.c

static int xfrm6_tunnel_rcv(struct sk_buff *skb)
{
	struct net *net = dev_net(skb->dev);
	const struct ipv6hdr *iph = ipv6_hdr(skb);
	__be32 spi;

	spi = xfrm6_tunnel_spi_lookup(net, (const xfrm_address_t *)&iph->saddr);
	return xfrm6_rcv_spi(skb, IPPROTO_IPV6, spi, NULL);
}

Project: linux
File: xfrm_user.c

static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
{
	memset(p, 0, sizeof(*p));
	memcpy(&p->sel, &xp->selector, sizeof(p->sel));
	memcpy(&p->lft, &xp->lft, sizeof(p->lft));
	memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
	p->priority = xp->priority;
	p->index = xp->index;
	p->sel.family = xp->family;
	p->dir = dir;
	p->action = xp->action;
	p->flags = xp->flags;
	p->share = XFRM_SHARE_ANY; /* XXX xp->share */
}

Project: linux
File: xfrm_state.c

struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family)
{
	if (unlikely(family >= NPROTO))
		return NULL;

	return rcu_dereference(xfrm_state_afinfo[family]);
}

Project: linux
File: xfrm6_tunnel.c

static inline unsigned int xfrm6_tunnel_spi_hash_byaddr(const xfrm_address_t *addr)
{
	unsigned int h;

	h = ipv6_addr_hash((const struct in6_addr *)addr);
	h ^= h >> 16;
	h ^= h >> 8;
	h &= XFRM6_TUNNEL_SPI_BYADDR_HSIZE - 1;

	return h;
}

Project: linux
File: af_key.c

static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
{
	u8 proto;
	struct xfrm_address_filter *filter = NULL;
	struct pfkey_sock *pfk = pfkey_sk(sk);

	mutex_lock(&pfk->dump_lock);
	if (pfk->dump.dump != NULL) {
		mutex_unlock(&pfk->dump_lock);
		return -EBUSY;
	}

	proto = pfkey_satype2proto(hdr->sadb_msg_satype);
	if (proto == 0) {
		mutex_unlock(&pfk->dump_lock);
		return -EINVAL;
	}

	if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
		struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];

		filter = kmalloc(sizeof(*filter), GFP_KERNEL);
		if (filter == NULL) {
			mutex_unlock(&pfk->dump_lock);
			return -ENOMEM;
		}

		memcpy(&filter->saddr, &xfilter->sadb_x_filter_saddr,
		       sizeof(xfrm_address_t));
		memcpy(&filter->daddr, &xfilter->sadb_x_filter_daddr,
		       sizeof(xfrm_address_t));
		filter->family = xfilter->sadb_x_filter_family;
		filter->splen = xfilter->sadb_x_filter_splen;
		filter->dplen = xfilter->sadb_x_filter_dplen;
	}

	pfk->dump.msg_version = hdr->sadb_msg_version;
	pfk->dump.msg_portid = 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, filter);
	mutex_unlock(&pfk->dump_lock);

	return pfkey_do_dump(pfk);
}

Project: linux
File: xfrm_user.c

static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
{
	struct nlattr *rt = attrs[XFRMA_SEC_CTX];
	struct xfrm_user_sec_ctx *uctx;

	if (!rt)
		return 0;

	uctx = nla_data(rt);
	return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
}

Project: linux
File: xfrm_state.c

void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net)
{
	kfree(walk->filter);

	if (list_empty(&walk->all))
		return;

	spin_lock_bh(&net->xfrm.xfrm_state_lock);
	list_del(&walk->all);
	spin_unlock_bh(&net->xfrm.xfrm_state_lock);
}

Project: linux
File: xfrm.h

static inline int xfrm_state_kern(const struct xfrm_state *x)
{
	return atomic_read(&x->tunnel_users);
}

Project: linux
File: xfrm_state.c

int xfrm_state_update(struct xfrm_state *x)
{
	struct xfrm_state *x1, *to_put;
	int err;
	int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
	struct net *net = xs_net(x);

	to_put = NULL;

	spin_lock_bh(&net->xfrm.xfrm_state_lock);
	x1 = __xfrm_state_locate(x, use_spi, x->props.family);

	err = -ESRCH;
	if (!x1)
		goto out;

	if (xfrm_state_kern(x1)) {
		to_put = x1;
		err = -EEXIST;
		goto out;
	}

	if (x1->km.state == XFRM_STATE_ACQ) {
		__xfrm_state_insert(x);
		x = NULL;
	}
	err = 0;

out:
	spin_unlock_bh(&net->xfrm.xfrm_state_lock);

	if (to_put)
		xfrm_state_put(to_put);

	if (err)
		return err;

	if (!x) {
		xfrm_state_delete(x1);
		xfrm_state_put(x1);
		return 0;
	}

	err = -EINVAL;
	spin_lock_bh(&x1->lock);
	if (likely(x1->km.state == XFRM_STATE_VALID)) {
		if (x->encap && x1->encap &&
		    x->encap->encap_type == x1->encap->encap_type)
			memcpy(x1->encap, x->encap, sizeof(*x1->encap));
		else if (x->encap || x1->encap)
			goto fail;

		if (x->coaddr && x1->coaddr) {
			memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr));
		}
		if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel)))
			memcpy(&x1->sel, &x->sel, sizeof(x1->sel));
		memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
		x1->km.dying = 0;

		tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
		if (x1->curlft.use_time)
			xfrm_state_check_expire(x1);

		if (x->props.smark.m || x->props.smark.v || x->if_id) {
			spin_lock_bh(&net->xfrm.xfrm_state_lock);

			if (x->props.smark.m || x->props.smark.v)
				x1->props.smark = x->props.smark;

			if (x->if_id)
				x1->if_id = x->if_id;

			__xfrm_state_bump_genids(x1);
			spin_unlock_bh(&net->xfrm.xfrm_state_lock);
		}

		err = 0;
		x->km.state = XFRM_STATE_DEAD;
		__xfrm_state_put(x);
	}

fail:
	spin_unlock_bh(&x1->lock);

	xfrm_state_put(x1);

	return err;
}

Project: linux
File: xfrm.h

static inline void xfrm_state_hold(struct xfrm_state *x)
{
	refcount_inc(&x->refcnt);
}

Project: linux
File: xfrm_user.c

static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
			 xfrm_address_t *new_saddr, __be16 new_sport)
{
	struct xfrm_user_mapping *um;
	struct nlmsghdr *nlh;

	nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
	if (nlh == NULL)
		return -EMSGSIZE;

	um = nlmsg_data(nlh);

	memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
	um->id.spi = x->id.spi;
	um->id.family = x->props.family;
	um->id.proto = x->id.proto;
	memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
	memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
	um->new_sport = new_sport;
	um->old_sport = x->encap->encap_sport;
	um->reqid = x->props.reqid;

	nlmsg_end(skb, nlh);
	return 0;
}

Project: linux
File: xfrm_user.c

static int __net_init xfrm_user_net_init(struct net *net)
{
	struct sock *nlsk;
	struct netlink_kernel_cfg cfg = {
		.groups	= XFRMNLGRP_MAX,
		.input	= xfrm_netlink_rcv,
	};

	nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
	if (nlsk == NULL)
		return -ENOMEM;
	net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
	rcu_assign_pointer(net->xfrm.nlsk, nlsk);
	return 0;
}

Project: linux
File: xfrm_state.c

int xfrm_register_type(const struct xfrm_type *type, unsigned short family)
{
	struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
	const struct xfrm_type **typemap;
	int err = 0;

	if (unlikely(afinfo == NULL))
		return -EAFNOSUPPORT;
	typemap = afinfo->type_map;
	spin_lock_bh(&xfrm_type_lock);

	if (likely(typemap[type->proto] == NULL))
		typemap[type->proto] = type;
	else
		err = -EEXIST;
	spin_unlock_bh(&xfrm_type_lock);
	rcu_read_unlock();
	return err;
}

Project: linux
File: xfrm_user.c

static int copy_user_offload(struct xfrm_state_offload *xso, struct sk_buff *skb)
{
	struct xfrm_user_offload *xuo;
	struct nlattr *attr;

	attr = nla_reserve(skb, XFRMA_OFFLOAD_DEV, sizeof(*xuo));
	if (attr == NULL)
		return -EMSGSIZE;

	xuo = nla_data(attr);
	memset(xuo, 0, sizeof(*xuo));
	xuo->ifindex = xso->dev->ifindex;
	xuo->flags = xso->flags;

	return 0;
}

Project: linux
File: xfrm_state.c

static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
				      struct audit_buffer *audit_buf)
{
	const struct iphdr *iph4;
	const struct ipv6hdr *iph6;

	switch (family) {
	case AF_INET:
		iph4 = ip_hdr(skb);
		audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
				 &iph4->saddr, &iph4->daddr);
		break;
	case AF_INET6:
		iph6 = ipv6_hdr(skb);
		audit_log_format(audit_buf,
				 " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x",
				 &iph6->saddr, &iph6->daddr,
				 iph6->flow_lbl[0] & 0x0f,
				 iph6->flow_lbl[1],
				 iph6->flow_lbl[2]);
		break;
	}
}

Project: linux
File: xfrm_user.c

static int verify_auth_trunc(struct nlattr **attrs)
{
	struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
	struct xfrm_algo_auth *algp;

	if (!rt)
		return 0;

	algp = nla_data(rt);
	if (nla_len(rt) < (int)xfrm_alg_auth_len(algp))
		return -EINVAL;

	algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
	return 0;
}

Project: linux
File: xfrm.h

static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
{
	return __xfrm_policy_check2(sk, dir, skb, family, 0);
}

Project: linux
File: xfrm.h

static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
				      unsigned int family)
{
	return __xfrm_decode_session(skb, fl, family, 0);
}

Project: linux
File: xfrm_user.c

static inline unsigned int xfrm_aevent_msgsize(struct xfrm_state *x)
{
	unsigned int replay_size = x->replay_esn ?
			      xfrm_replay_state_esn_len(x->replay_esn) :
			      sizeof(struct xfrm_replay_state);

	return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
	       + nla_total_size(replay_size)
	       + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur))
	       + nla_total_size(sizeof(struct xfrm_mark))
	       + nla_total_size(4) /* XFRM_AE_RTHR */
	       + nla_total_size(4); /* XFRM_AE_ETHR */
}

Project: linux
File: xfrm_state.c

void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family)
{
	struct audit_buffer *audit_buf;

	audit_buf = xfrm_audit_start("SA-notfound");
	if (audit_buf == NULL)
		return;
	xfrm_audit_helper_pktinfo(skb, family, audit_buf);
	audit_log_end(audit_buf);
}

Project: linux
File: xfrm_state.c

xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
		unsigned short family)
{
	int i;
	int err = 0;
	struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
	struct net *net = xs_net(*src);

	if (!afinfo)
		return -EAFNOSUPPORT;

	spin_lock_bh(&net->xfrm.xfrm_state_lock);
	if (afinfo->state_sort)
		err = afinfo->state_sort(dst, src, n);
	else
		for (i = 0; i < n; i++)
			dst[i] = src[i];
	spin_unlock_bh(&net->xfrm.xfrm_state_lock);
	rcu_read_unlock();
	return err;
}

Project: linux
File: xfrm_state.c

void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid)
{
	struct audit_buffer *audit_buf;

	audit_buf = xfrm_audit_start("SAD-add");
	if (audit_buf == NULL)
		return;
	xfrm_audit_helper_usrinfo(task_valid, audit_buf);
	xfrm_audit_helper_sainfo(x, audit_buf);
	audit_log_format(audit_buf, " res=%u", result);
	audit_log_end(audit_buf);
}

Project: linux
File: xfrm_user.c

static int build_sadinfo(struct sk_buff *skb, struct net *net,
			 u32 portid, u32 seq, u32 flags)
{
	struct xfrmk_sadinfo si;
	struct xfrmu_sadhinfo sh;
	struct nlmsghdr *nlh;
	int err;
	u32 *f;

	nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
	if (nlh == NULL) /* shouldn't really happen ... */
		return -EMSGSIZE;

	f = nlmsg_data(nlh);
	*f = flags;
	xfrm_sad_getinfo(net, &si);

	sh.sadhmcnt = si.sadhmcnt;
	sh.sadhcnt = si.sadhcnt;

	err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
	if (!err)
		err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
	if (err) {
		nlmsg_cancel(skb, nlh);
		return err;
	}

	nlmsg_end(skb, nlh);
	return 0;
}

Project: linux
File: xfrm_state.c

int xfrm_register_km(struct xfrm_mgr *km)
{
	spin_lock_bh(&xfrm_km_lock);
	list_add_tail_rcu(&km->list, &xfrm_km_list);
	spin_unlock_bh(&xfrm_km_lock);
	return 0;
}

Project: linux
File: xfrm_user.c

static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
{
	struct net *net = sock_net(skb->sk);
	struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
	struct xfrm_dump_info info;

	info.in_skb = cb->skb;
	info.out_skb = skb;
	info.nlmsg_seq = cb->nlh->nlmsg_seq;
	info.nlmsg_flags = NLM_F_MULTI;

	(void) xfrm_policy_walk(net, walk, dump_one_policy, &info);

	return skb->len;
}

Project: linux
File: xfrm.h

static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
{
	if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
	    (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
		return x->inner_mode;
	else
		return x->inner_mode_iaf;
}

Project: linux
File: xfrm_user.c

static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
			 int num_migrate, const struct xfrm_kmaddress *k,
			 const struct xfrm_selector *sel,
			 const struct xfrm_encap_tmpl *encap, u8 dir, u8 type)
{
	const struct xfrm_migrate *mp;
	struct xfrm_userpolicy_id *pol_id;
	struct nlmsghdr *nlh;
	int i, err;

	nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
	if (nlh == NULL)
		return -EMSGSIZE;

	pol_id = nlmsg_data(nlh);
	/* copy data from selector, dir, and type to the pol_id */
	memset(pol_id, 0, sizeof(*pol_id));
	memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
	pol_id->dir = dir;

	if (k != NULL) {
		err = copy_to_user_kmaddress(k, skb);
		if (err)
			goto out_cancel;
	}
	if (encap) {
		err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap);
		if (err)
			goto out_cancel;
	}
	err = copy_to_user_policy_type(type, skb);
	if (err)
		goto out_cancel;
	for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
		err = copy_to_user_migrate(mp, skb);
		if (err)
			goto out_cancel;
	}

	nlmsg_end(skb, nlh);
	return 0;

out_cancel:
	nlmsg_cancel(skb, nlh);
	return err;
}

Project: linux
File: xfrm_user.c

static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
{
	struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
	int err;

	if (!xp) {
		*errp = -ENOMEM;
		return NULL;
	}

	copy_from_user_policy(xp, p);

	err = copy_from_user_policy_type(&xp->type, attrs);
	if (err)
		goto error;

	if (!(err = copy_from_user_tmpl(xp, attrs)))
		err = copy_from_user_sec_ctx(xp, attrs);
	if (err)
		goto error;

	xfrm_mark_get(attrs, &xp->mark);

	if (attrs[XFRMA_IF_ID])
		xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);

	return xp;
 error:
	*errp = err;
	xp->walk.dead = 1;
	xfrm_policy_destroy(xp);
	return NULL;
}

Project: linux
File: xfrm_user.c

static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
			     __be16 sport)
{
	struct net *net = xs_net(x);
	struct sk_buff *skb;
	int err;

	if (x->id.proto != IPPROTO_ESP)
		return -EINVAL;

	if (!x->encap)
		return -EINVAL;

	skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
	if (skb == NULL)
		return -ENOMEM;

	err = build_mapping(skb, x, ipaddr, sport);
	BUG_ON(err < 0);

	return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
}

Project: linux
File: xfrm_state.c

int xfrm_state_add(struct xfrm_state *x)
{
	struct net *net = xs_net(x);
	struct xfrm_state *x1, *to_put;
	int family;
	int err;
	u32 mark = x->mark.v & x->mark.m;
	int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);

	family = x->props.family;

	to_put = NULL;

	spin_lock_bh(&net->xfrm.xfrm_state_lock);

	x1 = __xfrm_state_locate(x, use_spi, family);
	if (x1) {
		to_put = x1;
		x1 = NULL;
		err = -EEXIST;
		goto out;
	}

	if (use_spi && x->km.seq) {
		x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq);
		if (x1 && ((x1->id.proto != x->id.proto) ||
		    !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) {
			to_put = x1;
			x1 = NULL;
		}
	}

	if (use_spi && !x1)
		x1 = __find_acq_core(net, &x->mark, family, x->props.mode,
				     x->props.reqid, x->if_id, x->id.proto,
				     &x->id.daddr, &x->props.saddr, 0);

	__xfrm_state_bump_genids(x);
	__xfrm_state_insert(x);
	err = 0;

out:
	spin_unlock_bh(&net->xfrm.xfrm_state_lock);

	if (x1) {
		xfrm_state_delete(x1);
		xfrm_state_put(x1);
	}

	if (to_put)
		xfrm_state_put(to_put);

	return err;
}

Project: linux
File: xfrm_user.c

static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
{
	struct xfrm_dump_info *sp = ptr;
	struct sk_buff *in_skb = sp->in_skb;
	struct sk_buff *skb = sp->out_skb;
	struct xfrm_usersa_info *p;
	struct nlmsghdr *nlh;
	int err;

	nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
			XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
	if (nlh == NULL)
		return -EMSGSIZE;

	p = nlmsg_data(nlh);

	err = copy_to_user_state_extra(x, p, skb);
	if (err) {
		nlmsg_cancel(skb, nlh);
		return err;
	}
	nlmsg_end(skb, nlh);
	return 0;
}

Project: linux
File: xfrm.h

void xfrm_flowi_addr_get(const struct flowi *fl,
			 xfrm_address_t *saddr, xfrm_address_t *daddr,
			 unsigned short family)
{
	switch(family) {
	case AF_INET:
		memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
		memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
		break;
	case AF_INET6:
		saddr->in6 = fl->u.ip6.saddr;
		daddr->in6 = fl->u.ip6.daddr;
		break;
	}
}

Project: linux
File: af_key.c

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

	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]) {
		err = -EINVAL;
		goto out;
	}

	kma = ext_hdrs[SADB_X_EXT_KMADDRESS - 1];
	pol = ext_hdrs[SADB_X_EXT_POLICY - 1];

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

	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;
		}
	}

	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)
		sel.sport_mask = htons(0xffff);

	/* 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)
		sel.dport_mask = htons(0xffff);

	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;
	}

	return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
			    kma ? &k : NULL, net, NULL);

 out:
	return err;
}

Project: linux
File: xfrm_state.c

int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
{
	struct net *net = xs_net(x);
	unsigned int h;
	struct xfrm_state *x0;
	int err = -ENOENT;
	__be32 minspi = htonl(low);
	__be32 maxspi = htonl(high);
	u32 mark = x->mark.v & x->mark.m;

	spin_lock_bh(&x->lock);
	if (x->km.state == XFRM_STATE_DEAD)
		goto unlock;

	err = 0;
	if (x->id.spi)
		goto unlock;

	err = -ENOENT;

	if (minspi == maxspi) {
		x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family);
		if (x0) {
			xfrm_state_put(x0);
			goto unlock;
		}
		x->id.spi = minspi;
	} else {
		u32 spi = 0;
		for (h = 0; h < high-low+1; h++) {
			spi = low + prandom_u32()%(high-low+1);
			x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family);
			if (x0 == NULL) {
				x->id.spi = htonl(spi);
				break;
			}
			xfrm_state_put(x0);
		}
	}
	if (x->id.spi) {
		spin_lock_bh(&net->xfrm.xfrm_state_lock);
		h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family);
		hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h);
		spin_unlock_bh(&net->xfrm.xfrm_state_lock);

		err = 0;
	}

unlock:
	spin_unlock_bh(&x->lock);

	return err;
}

Project: linux
File: xfrm_state.c

void km_state_notify(struct xfrm_state *x, const struct km_event *c)
{
	struct xfrm_mgr *km;
	rcu_read_lock();
	list_for_each_entry_rcu(km, &xfrm_km_list, list)
		if (km->notify)
			km->notify(x, c);
	rcu_read_unlock();
}

Project: linux
File: xfrm.h

static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
{
	return xfrm_policy_check(sk, dir, skb, AF_INET);
}

Project: linux
File: xfrm.h

__be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
{
	__be16 port;
	switch(fl->flowi_proto) {
	case IPPROTO_TCP:
	case IPPROTO_UDP:
	case IPPROTO_UDPLITE:
	case IPPROTO_SCTP:
		port = uli->ports.dport;
		break;
	case IPPROTO_ICMP:
	case IPPROTO_ICMPV6:
		port = htons(uli->icmpt.code);
		break;
	case IPPROTO_GRE:
		port = htons(ntohl(uli->gre_key) & 0xffff);
		break;
	default:
		port = 0;	/*XXX*/
	}
	return port;
}

Project: linux
File: xfrm.h

static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst)
{
#ifdef CONFIG_XFRM
	if (dst->xfrm) {
		struct xfrm_dst *xdst = (struct xfrm_dst *) dst;
		return xdst->child;
	}
#endif
	return NULL;
}

Project: linux
File: xfrm_state.c

static unsigned long xfrm_hash_new_size(unsigned int state_hmask)
{
	return ((state_hmask + 1) << 1) * sizeof(struct hlist_head);
}

Project: linux
File: xfrm_user.c

static int xfrm_notify_sa_flush(const struct km_event *c)
{
	struct net *net = c->net;
	struct xfrm_usersa_flush *p;
	struct nlmsghdr *nlh;
	struct sk_buff *skb;
	int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));

	skb = nlmsg_new(len, GFP_ATOMIC);
	if (skb == NULL)
		return -ENOMEM;

	nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
	if (nlh == NULL) {
		kfree_skb(skb);
		return -EMSGSIZE;
	}

	p = nlmsg_data(nlh);
	p->proto = c->data.proto;

	nlmsg_end(skb, nlh);

	return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
}

Project: linux
File: xfrm_state.c

struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net)
{
	unsigned int h;
	struct xfrm_state *x = NULL;

	spin_lock_bh(&net->xfrm.xfrm_state_lock);

	if (m->reqid) {
		h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr,
				  m->reqid, m->old_family);
		hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
			if (x->props.mode != m->mode ||
			    x->id.proto != m->proto)
				continue;
			if (m->reqid && x->props.reqid != m->reqid)
				continue;
			if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
					     m->old_family) ||
			    !xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
					     m->old_family))
				continue;
			xfrm_state_hold(x);
			break;
		}
	} else {
		h = xfrm_src_hash(net, &m->old_daddr, &m->old_saddr,
				  m->old_family);
		hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) {
			if (x->props.mode != m->mode ||
			    x->id.proto != m->proto)
				continue;
			if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
					     m->old_family) ||
			    !xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
					     m->old_family))
				continue;
			xfrm_state_hold(x);
			break;
		}
	}

	spin_unlock_bh(&net->xfrm.xfrm_state_lock);

	return x;
}

Project: linux
File: xfrm.h

__xfrm6_state_addr_check(const struct xfrm_state *x,
			 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
{
	if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
	    (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
	     ipv6_addr_any((struct in6_addr *)saddr) ||
	     ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
		return 1;
	return 0;
}

Project: linux
File: xfrm_state.c

struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
{
	struct xfrm_state *x;

	spin_lock_bh(&net->xfrm.xfrm_state_lock);
	x = __xfrm_find_acq_byseq(net, mark, seq);
	spin_unlock_bh(&net->xfrm.xfrm_state_lock);
	return x;
}

Project: linux
File: xfrm_state.c

int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
		    int (*func)(struct xfrm_state *, int, void*),
		    void *data)
{
	struct xfrm_state *state;
	struct xfrm_state_walk *x;
	int err = 0;

	if (walk->seq != 0 && list_empty(&walk->all))
		return 0;

	spin_lock_bh(&net->xfrm.xfrm_state_lock);
	if (list_empty(&walk->all))
		x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all);
	else
		x = list_first_entry(&walk->all, struct xfrm_state_walk, all);
	list_for_each_entry_from(x, &net->xfrm.state_all, all) {
		if (x->state == XFRM_STATE_DEAD)
			continue;
		state = container_of(x, struct xfrm_state, km);
		if (!xfrm_id_proto_match(state->id.proto, walk->proto))
			continue;
		if (!__xfrm_state_filter_match(state, walk->filter))
			continue;
		err = func(state, walk->seq, data);
		if (err) {
			list_move_tail(&walk->all, &x->all);
			goto out;
		}
		walk->seq++;
	}
	if (walk->seq == 0) {
		err = -ENOENT;
		goto out;
	}
	list_del_init(&walk->all);
out:
	spin_unlock_bh(&net->xfrm.xfrm_state_lock);
	return err;
}

Project: linux
File: xfrm_user.c

static inline unsigned int xfrm_acquire_msgsize(struct xfrm_state *x,
						struct xfrm_policy *xp)
{
	return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
	       + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
	       + nla_total_size(sizeof(struct xfrm_mark))
	       + nla_total_size(xfrm_user_sec_ctx_size(x->security))
	       + userpolicy_type_attrsize();
}

Project: linux
File: xfrm6_tunnel.c

__be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr)
{
	struct xfrm6_tunnel_spi *x6spi;
	u32 spi;

	spin_lock_bh(&xfrm6_tunnel_spi_lock);
	x6spi = __xfrm6_tunnel_spi_lookup(net, saddr);
	if (x6spi) {
		refcount_inc(&x6spi->refcnt);
		spi = x6spi->spi;
	} else
		spi = __xfrm6_tunnel_alloc_spi(net, saddr);
	spin_unlock_bh(&xfrm6_tunnel_spi_lock);

	return htonl(spi);
}

Project: linux
File: xfrm6_tunnel.c

static int xfrm6_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
{
	return skb_network_header(skb)[IP6CB(skb)->nhoff];
}

Project: linux
File: xfrm6_tunnel.c

static void xfrm6_tunnel_destroy(struct xfrm_state *x)
{
	struct net *net = xs_net(x);

	xfrm6_tunnel_free_spi(net, (xfrm_address_t *)&x->props.saddr);
}

Project: linux
File: xfrm.h

static inline bool addr_match(const void *token1, const void *token2,
			      unsigned int prefixlen)
{
	const __be32 *a1 = token1;
	const __be32 *a2 = token2;
	unsigned int pdw;
	unsigned int pbi;

	pdw = prefixlen >> 5;	  /* num of whole u32 in prefix */
	pbi = prefixlen &  0x1f;  /* num of bits in incomplete u32 in prefix */

	if (pdw)
		if (memcmp(a1, a2, pdw << 2))
			return false;

	if (pbi) {
		__be32 mask;

		mask = htonl((0xffffffff) << (32 - pbi));

		if ((a1[pdw] ^ a2[pdw]) & mask)
			return false;
	}

	return true;
}

Project: linux
File: xfrm_state.c

xfrm_get_type_offload(u8 proto, unsigned short family, bool try_load)
{
	struct xfrm_state_afinfo *afinfo;
	const struct xfrm_type_offload **typemap;
	const struct xfrm_type_offload *type;

retry:
	afinfo = xfrm_state_get_afinfo(family);
	if (unlikely(afinfo == NULL))
		return NULL;
	typemap = afinfo->type_offload_map;

	type = typemap[proto];
	if ((type && !try_module_get(type->owner)))
		type = NULL;

	rcu_read_unlock();

	if (!type && try_load) {
		request_module("xfrm-offload-%d-%d", family, proto);
		try_load = false;
		goto retry;
	}

	return type;
}

Project: linux
File: xfrm_user.c

static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
{
	struct xfrm_aevent_id *id;
	struct nlmsghdr *nlh;
	int err;

	nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
	if (nlh == NULL)
		return -EMSGSIZE;

	id = nlmsg_data(nlh);
	memset(&id->sa_id, 0, sizeof(id->sa_id));
	memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
	id->sa_id.spi = x->id.spi;
	id->sa_id.family = x->props.family;
	id->sa_id.proto = x->id.proto;
	memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
	id->reqid = x->props.reqid;
	id->flags = c->data.aevent;

	if (x->replay_esn) {
		err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
			      xfrm_replay_state_esn_len(x->replay_esn),
			      x->replay_esn);
	} else {
		err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
			      &x->replay);
	}
	if (err)
		goto out_cancel;
	err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft,
			    XFRMA_PAD);
	if (err)
		goto out_cancel;

	if (id->flags & XFRM_AE_RTHR) {
		err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
		if (err)
			goto out_cancel;
	}
	if (id->flags & XFRM_AE_ETHR) {
		err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
				  x->replay_maxage * 10 / HZ);
		if (err)
			goto out_cancel;
	}
	err = xfrm_mark_put(skb, &x->mark);
	if (err)
		goto out_cancel;

	err = xfrm_if_id_put(skb, x->if_id);
	if (err)
		goto out_cancel;

	nlmsg_end(skb, nlh);
	return 0;

out_cancel:
	nlmsg_cancel(skb, nlh);
	return err;
}

Project: linux
File: xfrm_state.c

static void xfrm_hash_transfer(struct hlist_head *list,
			       struct hlist_head *ndsttable,
			       struct hlist_head *nsrctable,
			       struct hlist_head *nspitable,
			       unsigned int nhashmask)
{
	struct hlist_node *tmp;
	struct xfrm_state *x;

	hlist_for_each_entry_safe(x, tmp, list, bydst) {
		unsigned int h;

		h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
				    x->props.reqid, x->props.family,
				    nhashmask);
		hlist_add_head_rcu(&x->bydst, ndsttable + h);

		h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr,
				    x->props.family,
				    nhashmask);
		hlist_add_head_rcu(&x->bysrc, nsrctable + h);

		if (x->id.spi) {
			h = __xfrm_spi_hash(&x->id.daddr, x->id.spi,
					    x->id.proto, x->props.family,
					    nhashmask);
			hlist_add_head_rcu(&x->byspi, nspitable + h);
		}
	}
}

Project: linux
File: xfrm_state.c

int xfrm_init_state(struct xfrm_state *x)
{
	int err;

	err = __xfrm_init_state(x, true, false);
	if (!err)
		x->km.state = XFRM_STATE_VALID;

	return err;
}

Project: linux
File: xfrm_user.c

static int xfrm_smark_put(struct sk_buff *skb, struct xfrm_mark *m)
{
	int ret = 0;

	if (m->v | m->m) {
		ret = nla_put_u32(skb, XFRMA_SET_MARK, m->v);
		if (!ret)
			ret = nla_put_u32(skb, XFRMA_SET_MARK_MASK, m->m);
	}
	return ret;
}

Project: linux
File: xfrm.h

static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg)
{
	return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
}

Project: linux
File: xfrm_state.c

int __xfrm_state_delete(struct xfrm_state *x)
{
	struct net *net = xs_net(x);
	int err = -ESRCH;

	if (x->km.state != XFRM_STATE_DEAD) {
		x->km.state = XFRM_STATE_DEAD;
		spin_lock(&net->xfrm.xfrm_state_lock);
		list_del(&x->km.all);
		hlist_del_rcu(&x->bydst);
		hlist_del_rcu(&x->bysrc);
		if (x->id.spi)
			hlist_del_rcu(&x->byspi);
		net->xfrm.state_num--;
		spin_unlock(&net->xfrm.xfrm_state_lock);

		xfrm_dev_state_delete(x);

		/* All xfrm_state objects are created by xfrm_state_alloc.
		 * The xfrm_state_alloc call gives a reference, and that
		 * is what we are dropping here.
		 */
		xfrm_state_put(x);
		err = 0;
	}

	return err;
}

Project: linux
File: xfrm.h

static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
{
	return true;
}

Project: linux
File: xfrm_state.c

int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family)
{
	struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
	const struct xfrm_type **typemap;
	int err = 0;

	if (unlikely(afinfo == NULL))
		return -EAFNOSUPPORT;
	typemap = afinfo->type_map;
	spin_lock_bh(&xfrm_type_lock);

	if (unlikely(typemap[type->proto] != type))
		err = -ENOENT;
	else
		typemap[type->proto] = NULL;
	spin_unlock_bh(&xfrm_type_lock);
	rcu_read_unlock();
	return err;
}

Project: linux
File: xfrm.h

static inline int xfrm_policy_id2dir(u32 index)
{
	return index & 7;
}

Project: linux
File: xfrm_state.c

int xfrm_unregister_type_offload(const struct xfrm_type_offload *type,
				 unsigned short family)
{
	struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
	const struct xfrm_type_offload **typemap;
	int err = 0;

	if (unlikely(afinfo == NULL))
		return -EAFNOSUPPORT;
	typemap = afinfo->type_offload_map;
	spin_lock_bh(&xfrm_type_offload_lock);

	if (unlikely(typemap[type->proto] != type))
		err = -ENOENT;
	else
		typemap[type->proto] = NULL;
	spin_unlock_bh(&xfrm_type_offload_lock);
	rcu_read_unlock();
	return err;
}

Project: linux
File: af_key.c

static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sadb_msg *hdr, void * const *ext_hdrs)
{
	struct net *net = sock_net(sk);
	int err;
	struct sadb_address *sa;
	struct sadb_x_policy *pol;
	struct xfrm_policy *xp;
	struct xfrm_selector sel;
	struct km_event c;
	struct sadb_x_sec_ctx *sec_ctx;
	struct xfrm_sec_ctx *pol_ctx = NULL;

	if (!present_and_same_family(ext_hdrs[SADB_EXT_ADDRESS_SRC-1],
				     ext_hdrs[SADB_EXT_ADDRESS_DST-1]) ||
	    !ext_hdrs[SADB_X_EXT_POLICY-1])
		return -EINVAL;

	pol = ext_hdrs[SADB_X_EXT_POLICY-1];
	if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
		return -EINVAL;

	memset(&sel, 0, sizeof(sel));

	sa = ext_hdrs[SADB_EXT_ADDRESS_SRC-1];
	sel.family = pfkey_sadb_addr2xfrm_addr(sa, &sel.saddr);
	sel.prefixlen_s = sa->sadb_address_prefixlen;
	sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
	sel.sport = ((struct sockaddr_in *)(sa+1))->sin_port;
	if (sel.sport)
		sel.sport_mask = htons(0xffff);

	sa = ext_hdrs[SADB_EXT_ADDRESS_DST-1];
	pfkey_sadb_addr2xfrm_addr(sa, &sel.daddr);
	sel.prefixlen_d = sa->sadb_address_prefixlen;
	sel.proto = pfkey_proto_to_xfrm(sa->sadb_address_proto);
	sel.dport = ((struct sockaddr_in *)(sa+1))->sin_port;
	if (sel.dport)
		sel.dport_mask = htons(0xffff);

	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, GFP_KERNEL);

		if (!uctx)
			return -ENOMEM;

		err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL);
		kfree(uctx);
		if (err)
			return err;
	}

	xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, 0, XFRM_POLICY_TYPE_MAIN,
				   pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
				   1, &err);
	security_xfrm_policy_free(pol_ctx);
	if (xp == NULL)
		return -ENOENT;

	xfrm_audit_policy_delete(xp, err ? 0 : 1, true);

	if (err)
		goto out;

	c.seq = hdr->sadb_msg_seq;
	c.portid = hdr->sadb_msg_pid;
	c.data.byid = 0;
	c.event = XFRM_MSG_DELPOLICY;
	km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);

out:
	xfrm_pol_put(xp);
	return err;
}

Project: linux
File: xfrm_state.c

int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync)
{
	int i, err = 0, cnt = 0;

	spin_lock_bh(&net->xfrm.xfrm_state_lock);
	err = xfrm_state_flush_secctx_check(net, proto, task_valid);
	if (err)
		goto out;

	err = -ESRCH;
	for (i = 0; i <= net->xfrm.state_hmask; i++) {
		struct xfrm_state *x;
restart:
		hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
			if (!xfrm_state_kern(x) &&
			    xfrm_id_proto_match(x->id.proto, proto)) {
				xfrm_state_hold(x);
				spin_unlock_bh(&net->xfrm.xfrm_state_lock);

				err = xfrm_state_delete(x);
				xfrm_audit_state_delete(x, err ? 0 : 1,
							task_valid);
				if (sync)
					xfrm_state_put_sync(x);
				else
					xfrm_state_put(x);
				if (!err)
					cnt++;

				spin_lock_bh(&net->xfrm.xfrm_state_lock);
				goto restart;
			}
		}
	}
out:
	spin_unlock_bh(&net->xfrm.xfrm_state_lock);
	if (cnt)
		err = 0;

	return err;
}

Project: linux
File: xfrm6_tunnel.c

static int xfrm6_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
{
	skb_push(skb, -skb_network_offset(skb));
	return 0;
}

Project: linux
File: xfrm_state.c

static void xfrm_hash_resize(struct work_struct *work)
{
	struct net *net = container_of(work, struct net, xfrm.state_hash_work);
	struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi;
	unsigned long nsize, osize;
	unsigned int nhashmask, ohashmask;
	int i;

	nsize = xfrm_hash_new_size(net->xfrm.state_hmask);
	ndst = xfrm_hash_alloc(nsize);
	if (!ndst)
		return;
	nsrc = xfrm_hash_alloc(nsize);
	if (!nsrc) {
		xfrm_hash_free(ndst, nsize);
		return;
	}
	nspi = xfrm_hash_alloc(nsize);
	if (!nspi) {
		xfrm_hash_free(ndst, nsize);
		xfrm_hash_free(nsrc, nsize);
		return;
	}

	spin_lock_bh(&net->xfrm.xfrm_state_lock);
	write_seqcount_begin(&xfrm_state_hash_generation);

	nhashmask = (nsize / sizeof(struct hlist_head)) - 1U;
	odst = xfrm_state_deref_prot(net->xfrm.state_bydst, net);
	for (i = net->xfrm.state_hmask; i >= 0; i--)
		xfrm_hash_transfer(odst + i, ndst, nsrc, nspi, nhashmask);

	osrc = xfrm_state_deref_prot(net->xfrm.state_bysrc, net);
	ospi = xfrm_state_deref_prot(net->xfrm.state_byspi, net);
	ohashmask = net->xfrm.state_hmask;

	rcu_assign_pointer(net->xfrm.state_bydst, ndst);
	rcu_assign_pointer(net->xfrm.state_bysrc, nsrc);
	rcu_assign_pointer(net->xfrm.state_byspi, nspi);
	net->xfrm.state_hmask = nhashmask;

	write_seqcount_end(&xfrm_state_hash_generation);
	spin_unlock_bh(&net->xfrm.xfrm_state_lock);

	osize = (ohashmask + 1) * sizeof(struct hlist_head);

	synchronize_rcu();

	xfrm_hash_free(odst, osize);
	xfrm_hash_free(osrc, osize);
	xfrm_hash_free(ospi, osize);
}

Project: linux
File: xfrm_state.c

static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
{
	int i;

	for (i = 0; i <= net->xfrm.state_hmask; i++) {
		struct xfrm_state *x;

		hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
			if (x->km.seq == seq &&
			    (mark & x->mark.m) == x->mark.v &&
			    x->km.state == XFRM_STATE_ACQ) {
				xfrm_state_hold(x);
				return x;
			}
		}
	}
	return NULL;
}

Project: linux
File: xfrm.h

static inline void xfrm_sysctl_fini(struct net *net)
{
}

Project: linux
File: xfrm.h

static inline int xfrm_acquire_is_on(struct net *net)
{
	struct sock *nlsk;
	int ret = 0;

	rcu_read_lock();
	nlsk = rcu_dereference(net->xfrm.nlsk);
	if (nlsk)
		ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
	rcu_read_unlock();

	return ret;
}