Commit message: netfilter: ctnetlink: add a range check for l3/l4 protonum

The indexes to the nf_nat_l[34]protos arrays come from userspace. So
check the tuple's family, e.g. l3num, when creating the conntrack in
order to prevent an OOB memory access during setup.  Here is an example
kernel panic on 4.14.180 when userspace passes in an index greater than
NFPROTO_NUMPROTO.

Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
Modules linked in:...
Process poc (pid: 5614, stack limit = 0x00000000a3933121)
CPU: 4 PID: 5614 Comm: poc Tainted: G S      W  O    4.14.180-g051355490483
Hardware name: Qualcomm Technologies, Inc. SM8150 V2 PM8150 Google Inc. MSM
task: 000000002a3dfffe task.stack: 00000000a3933121
pc : __cfi_check_fail+0x1c/0x24
lr : __cfi_check_fail+0x1c/0x24
...
Call trace:
__cfi_check_fail+0x1c/0x24
name_to_dev_t+0x0/0x468
nfnetlink_parse_nat_setup+0x234/0x258
ctnetlink_parse_nat_setup+0x4c/0x228
ctnetlink_new_conntrack+0x590/0xc40
nfnetlink_rcv_msg+0x31c/0x4d4
netlink_rcv_skb+0x100/0x184
nfnetlink_rcv+0xf4/0x180
netlink_unicast+0x360/0x770
netlink_sendmsg+0x5a0/0x6a4
___sys_sendmsg+0x314/0x46c
SyS_sendmsg+0xb4/0x108
el0_svc_naked+0x34/0x38

This crash is not happening since 5.4+, however, ctnetlink still
allows for creating entries with unsupported layer 3 protocol number.

Fixes: c1d10adb4a521 ("[NETFILTER]: Add ctnetlink port for nf_conntrack")
Signed-off-by: Will McVicker <willmcvicker@google.com>
[pablo@netfilter.org: rebased original patch on top of nf.git]
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
CVE: CVE-2020-25211
CWE: CWE-120
Vulnerability description: In the Linux kernel through 5.8.7, local attackers able to inject conntrack netlink configuration could overflow a local buffer, causing crashes or triggering use of incorrect protocol numbers in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c, aka CID-1cc5ef91d2ff.

Project: linux
File: nf_conntrack_netlink.c

static int ipv6_nlattr_to_tuple(struct nlattr *tb[],
				struct nf_conntrack_tuple *t,
				u_int32_t flags)
{
	if (flags & CTA_FILTER_FLAG(CTA_IP_SRC)) {
		if (!tb[CTA_IP_V6_SRC])
			return -EINVAL;

		t->src.u3.in6 = nla_get_in6_addr(tb[CTA_IP_V6_SRC]);
	}

	if (flags & CTA_FILTER_FLAG(CTA_IP_DST)) {
		if (!tb[CTA_IP_V6_DST])
			return -EINVAL;

		t->dst.u3.in6 = nla_get_in6_addr(tb[CTA_IP_V6_DST]);
	}

	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_change_conntrack(struct nf_conn *ct,
			   const struct nlattr * const cda[])
{
	int err;

	/* only allow NAT changes and master assignation for new conntracks */
	if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER])
		return -EOPNOTSUPP;

	if (cda[CTA_HELP]) {
		err = ctnetlink_change_helper(ct, cda);
		if (err < 0)
			return err;
	}

	if (cda[CTA_TIMEOUT]) {
		err = ctnetlink_change_timeout(ct, cda);
		if (err < 0)
			return err;
	}

	if (cda[CTA_STATUS]) {
		err = ctnetlink_change_status(ct, cda);
		if (err < 0)
			return err;
	}

	if (cda[CTA_PROTOINFO]) {
		err = ctnetlink_change_protoinfo(ct, cda);
		if (err < 0)
			return err;
	}

#if defined(CONFIG_NF_CONNTRACK_MARK)
	if (cda[CTA_MARK])
		ctnetlink_change_mark(ct, cda);
#endif

	if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) {
		err = ctnetlink_change_seq_adj(ct, cda);
		if (err < 0)
			return err;
	}

	if (cda[CTA_SYNPROXY]) {
		err = ctnetlink_change_synproxy(ct, cda);
		if (err < 0)
			return err;
	}

	if (cda[CTA_LABELS]) {
		err = ctnetlink_attach_labels(ct, cda);
		if (err < 0)
			return err;
	}

	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_exp_dump_tuple(struct sk_buff *skb,
				    const struct nf_conntrack_tuple *tuple,
				    u32 type)
{
	struct nlattr *nest_parms;

	nest_parms = nla_nest_start(skb, type);
	if (!nest_parms)
		goto nla_put_failure;
	if (ctnetlink_dump_tuples(skb, tuple) < 0)
		goto nla_put_failure;
	nla_nest_end(skb, nest_parms);

	return 0;

nla_put_failure:
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_get_conntrack(struct net *net, struct sock *ctnl,
				   struct sk_buff *skb,
				   const struct nlmsghdr *nlh,
				   const struct nlattr * const cda[],
				   struct netlink_ext_ack *extack)
{
	struct nf_conntrack_tuple_hash *h;
	struct nf_conntrack_tuple tuple;
	struct nf_conn *ct;
	struct sk_buff *skb2 = NULL;
	struct nfgenmsg *nfmsg = nlmsg_data(nlh);
	u_int8_t u3 = nfmsg->nfgen_family;
	struct nf_conntrack_zone zone;
	int err;

	if (nlh->nlmsg_flags & NLM_F_DUMP) {
		struct netlink_dump_control c = {
			.start = ctnetlink_start,
			.dump = ctnetlink_dump_table,
			.done = ctnetlink_done,
			.data = (void *)cda,
		};

		return netlink_dump_start(ctnl, skb, nlh, &c);
	}

	err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
	if (err < 0)
		return err;

	if (cda[CTA_TUPLE_ORIG])
		err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG,
					    u3, &zone);
	else if (cda[CTA_TUPLE_REPLY])
		err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY,
					    u3, &zone);
	else
		return -EINVAL;

	if (err < 0)
		return err;

	h = nf_conntrack_find_get(net, &zone, &tuple);
	if (!h)
		return -ENOENT;

	ct = nf_ct_tuplehash_to_ctrack(h);

	err = -ENOMEM;
	skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	if (skb2 == NULL) {
		nf_ct_put(ct);
		return -ENOMEM;
	}

	err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
				  NFNL_MSG_TYPE(nlh->nlmsg_type), ct, true, 0);
	nf_ct_put(ct);
	if (err <= 0)
		goto free;

	err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
	if (err < 0)
		goto out;

	return 0;

free:
	kfree_skb(skb2);
out:
	/* this avoids a loop in nfnetlink. */
	return err == -EAGAIN ? -ENOBUFS : err;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_done(struct netlink_callback *cb)
{
	if (cb->args[1])
		nf_ct_put((struct nf_conn *)cb->args[1]);
	kfree(cb->data);
	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

static inline size_t ctnetlink_acct_size(const struct nf_conn *ct)
{
	if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT))
		return 0;
	return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
	       + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */
	       + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */
	       ;
}

Project: linux
File: nf_conntrack_netlink.c

	__must_hold(RCU)
{
	struct nf_nat_hook *nat_hook;
	int err;

	nat_hook = rcu_dereference(nf_nat_hook);
	if (!nat_hook) {
#ifdef CONFIG_MODULES
		rcu_read_unlock();
		nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
		if (request_module("nf-nat") < 0) {
			nfnl_lock(NFNL_SUBSYS_CTNETLINK);
			rcu_read_lock();
			return -EOPNOTSUPP;
		}
		nfnl_lock(NFNL_SUBSYS_CTNETLINK);
		rcu_read_lock();
		nat_hook = rcu_dereference(nf_nat_hook);
		if (nat_hook)
			return -EAGAIN;
#endif
		return -EOPNOTSUPP;
	}

	err = nat_hook->parse_nat_setup(ct, manip, attr);
	if (err == -EAGAIN) {
#ifdef CONFIG_MODULES
		rcu_read_unlock();
		nfnl_unlock(NFNL_SUBSYS_CTNETLINK);
		if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) {
			nfnl_lock(NFNL_SUBSYS_CTNETLINK);
			rcu_read_lock();
			return -EOPNOTSUPP;
		}
		nfnl_lock(NFNL_SUBSYS_CTNETLINK);
		rcu_read_lock();
#else
		err = -EOPNOTSUPP;
#endif
	}
	return err;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[])
{
#ifdef CONFIG_NF_CONNTRACK_LABELS
	size_t len = nla_len(cda[CTA_LABELS]);
	const void *mask = cda[CTA_LABELS_MASK];

	if (len & (sizeof(u32)-1)) /* must be multiple of u32 */
		return -EINVAL;

	if (mask) {
		if (nla_len(cda[CTA_LABELS_MASK]) == 0 ||
		    nla_len(cda[CTA_LABELS_MASK]) != len)
			return -EINVAL;
		mask = nla_data(cda[CTA_LABELS_MASK]);
	}

	len /= sizeof(u32);

	return nf_connlabels_replace(ct, nla_data(cda[CTA_LABELS]), mask, len);
#else
	return -EOPNOTSUPP;
#endif
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_exp_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
			int event, const struct nf_conntrack_expect *exp)
{
	struct nlmsghdr *nlh;
	struct nfgenmsg *nfmsg;
	unsigned int flags = portid ? NLM_F_MULTI : 0;

	event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK_EXP, event);
	nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
	if (nlh == NULL)
		goto nlmsg_failure;

	nfmsg = nlmsg_data(nlh);
	nfmsg->nfgen_family = exp->tuple.src.l3num;
	nfmsg->version	    = NFNETLINK_V0;
	nfmsg->res_id	    = 0;

	if (ctnetlink_exp_dump_expect(skb, exp) < 0)
		goto nla_put_failure;

	nlmsg_end(skb, nlh);
	return skb->len;

nlmsg_failure:
nla_put_failure:
	nlmsg_cancel(skb, nlh);
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

static struct nf_conn *ctnetlink_glue_get_ct(const struct sk_buff *skb,
					     enum ip_conntrack_info *ctinfo)
{
	return nf_ct_get(skb, ctinfo);
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_glue_attach_expect(const struct nlattr *attr, struct nf_conn *ct,
			     u32 portid, u32 report)
{
	struct nlattr *cda[CTA_EXPECT_MAX+1];
	struct nf_conntrack_tuple tuple, mask;
	struct nf_conntrack_helper *helper = NULL;
	struct nf_conntrack_expect *exp;
	int err;

	err = nla_parse_nested_deprecated(cda, CTA_EXPECT_MAX, attr,
					  exp_nla_policy, NULL);
	if (err < 0)
		return err;

	err = ctnetlink_glue_exp_parse((const struct nlattr * const *)cda,
				       ct, &tuple, &mask);
	if (err < 0)
		return err;

	if (cda[CTA_EXPECT_HELP_NAME]) {
		const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);

		helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
						    nf_ct_protonum(ct));
		if (helper == NULL)
			return -EOPNOTSUPP;
	}

	exp = ctnetlink_alloc_expect((const struct nlattr * const *)cda, ct,
				     helper, &tuple, &mask);
	if (IS_ERR(exp))
		return PTR_ERR(exp);

	err = nf_ct_expect_related_report(exp, portid, report, 0);
	nf_ct_expect_put(exp);
	return err;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_dump_helpinfo(struct sk_buff *skb,
				   const struct nf_conn *ct)
{
	struct nlattr *nest_helper;
	const struct nf_conn_help *help = nfct_help(ct);
	struct nf_conntrack_helper *helper;

	if (!help)
		return 0;

	helper = rcu_dereference(help->helper);
	if (!helper)
		goto out;

	nest_helper = nla_nest_start(skb, CTA_HELP);
	if (!nest_helper)
		goto nla_put_failure;
	if (nla_put_string(skb, CTA_HELP_NAME, helper->name))
		goto nla_put_failure;

	if (helper->to_nlattr)
		helper->to_nlattr(skb, ct);

	nla_nest_end(skb, nest_helper);
out:
	return 0;

nla_put_failure:
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_dump_list(struct sk_buff *skb, struct netlink_callback *cb, bool dying)
{
	struct nf_conn *ct, *last;
	struct nf_conntrack_tuple_hash *h;
	struct hlist_nulls_node *n;
	struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
	u_int8_t l3proto = nfmsg->nfgen_family;
	int res;
	int cpu;
	struct hlist_nulls_head *list;
	struct net *net = sock_net(skb->sk);

	if (cb->args[2])
		return 0;

	last = (struct nf_conn *)cb->args[1];

	for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
		struct ct_pcpu *pcpu;

		if (!cpu_possible(cpu))
			continue;

		pcpu = per_cpu_ptr(net->ct.pcpu_lists, cpu);
		spin_lock_bh(&pcpu->lock);
		list = dying ? &pcpu->dying : &pcpu->unconfirmed;
restart:
		hlist_nulls_for_each_entry(h, n, list, hnnode) {
			ct = nf_ct_tuplehash_to_ctrack(h);
			if (l3proto && nf_ct_l3num(ct) != l3proto)
				continue;
			if (cb->args[1]) {
				if (ct != last)
					continue;
				cb->args[1] = 0;
			}

			/* We can't dump extension info for the unconfirmed
			 * list because unconfirmed conntracks can have
			 * ct->ext reallocated (and thus freed).
			 *
			 * In the dying list case ct->ext can't be free'd
			 * until after we drop pcpu->lock.
			 */
			res = ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
						  cb->nlh->nlmsg_seq,
						  NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
						  ct, dying ? true : false, 0);
			if (res < 0) {
				if (!atomic_inc_not_zero(&ct->ct_general.use))
					continue;
				cb->args[0] = cpu;
				cb->args[1] = (unsigned long)ct;
				spin_unlock_bh(&pcpu->lock);
				goto out;
			}
		}
		if (cb->args[1]) {
			cb->args[1] = 0;
			goto restart;
		}
		spin_unlock_bh(&pcpu->lock);
	}
	cb->args[2] = 1;
out:
	if (last)
		nf_ct_put(last);

	return skb->len;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_new_expect(struct net *net, struct sock *ctnl,
				struct sk_buff *skb, const struct nlmsghdr *nlh,
				const struct nlattr * const cda[],
				struct netlink_ext_ack *extack)
{
	struct nf_conntrack_tuple tuple;
	struct nf_conntrack_expect *exp;
	struct nfgenmsg *nfmsg = nlmsg_data(nlh);
	u_int8_t u3 = nfmsg->nfgen_family;
	struct nf_conntrack_zone zone;
	int err;

	if (!cda[CTA_EXPECT_TUPLE]
	    || !cda[CTA_EXPECT_MASK]
	    || !cda[CTA_EXPECT_MASTER])
		return -EINVAL;

	err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
	if (err < 0)
		return err;

	err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
				    u3, NULL);
	if (err < 0)
		return err;

	spin_lock_bh(&nf_conntrack_expect_lock);
	exp = __nf_ct_expect_find(net, &zone, &tuple);
	if (!exp) {
		spin_unlock_bh(&nf_conntrack_expect_lock);
		err = -ENOENT;
		if (nlh->nlmsg_flags & NLM_F_CREATE) {
			err = ctnetlink_create_expect(net, &zone, cda, u3,
						      NETLINK_CB(skb).portid,
						      nlmsg_report(nlh));
		}
		return err;
	}

	err = -EEXIST;
	if (!(nlh->nlmsg_flags & NLM_F_EXCL))
		err = ctnetlink_change_expect(exp, cda);
	spin_unlock_bh(&nf_conntrack_expect_lock);

	return err;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_get_ct_dying(struct net *net, struct sock *ctnl,
				  struct sk_buff *skb,
				  const struct nlmsghdr *nlh,
				  const struct nlattr * const cda[],
				  struct netlink_ext_ack *extack)
{
	if (nlh->nlmsg_flags & NLM_F_DUMP) {
		struct netlink_dump_control c = {
			.dump = ctnetlink_dump_dying,
			.done = ctnetlink_done_list,
		};
		return netlink_dump_start(ctnl, skb, nlh, &c);
	}

	return -EOPNOTSUPP;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
{
	unsigned int flags = cb->data ? NLM_F_DUMP_FILTERED : 0;
	struct net *net = sock_net(skb->sk);
	struct nf_conn *ct, *last;
	struct nf_conntrack_tuple_hash *h;
	struct hlist_nulls_node *n;
	struct nf_conn *nf_ct_evict[8];
	int res, i;
	spinlock_t *lockp;

	last = (struct nf_conn *)cb->args[1];
	i = 0;

	local_bh_disable();
	for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) {
restart:
		while (i) {
			i--;
			if (nf_ct_should_gc(nf_ct_evict[i]))
				nf_ct_kill(nf_ct_evict[i]);
			nf_ct_put(nf_ct_evict[i]);
		}

		lockp = &nf_conntrack_locks[cb->args[0] % CONNTRACK_LOCKS];
		nf_conntrack_lock(lockp);
		if (cb->args[0] >= nf_conntrack_htable_size) {
			spin_unlock(lockp);
			goto out;
		}
		hlist_nulls_for_each_entry(h, n, &nf_conntrack_hash[cb->args[0]],
					   hnnode) {
			if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
				continue;
			ct = nf_ct_tuplehash_to_ctrack(h);
			if (nf_ct_is_expired(ct)) {
				if (i < ARRAY_SIZE(nf_ct_evict) &&
				    atomic_inc_not_zero(&ct->ct_general.use))
					nf_ct_evict[i++] = ct;
				continue;
			}

			if (!net_eq(net, nf_ct_net(ct)))
				continue;

			if (cb->args[1]) {
				if (ct != last)
					continue;
				cb->args[1] = 0;
			}
			if (!ctnetlink_filter_match(ct, cb->data))
				continue;

			res =
			ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid,
					    cb->nlh->nlmsg_seq,
					    NFNL_MSG_TYPE(cb->nlh->nlmsg_type),
					    ct, true, flags);
			if (res < 0) {
				nf_conntrack_get(&ct->ct_general);
				cb->args[1] = (unsigned long)ct;
				spin_unlock(lockp);
				goto out;
			}
		}
		spin_unlock(lockp);
		if (cb->args[1]) {
			cb->args[1] = 0;
			goto restart;
		}
	}
out:
	local_bh_enable();
	if (last) {
		/* nf ct hash resize happened, now clear the leftover. */
		if ((struct nf_conn *)cb->args[1] == last)
			cb->args[1] = 0;

		nf_ct_put(last);
	}

	while (i) {
		i--;
		if (nf_ct_should_gc(nf_ct_evict[i]))
			nf_ct_kill(nf_ct_evict[i]);
		nf_ct_put(nf_ct_evict[i]);
	}

	return skb->len;
}

Project: linux
File: nf_conntrack_netlink.c

static int change_seq_adj(struct nf_ct_seqadj *seq,
			  const struct nlattr * const attr)
{
	int err;
	struct nlattr *cda[CTA_SEQADJ_MAX+1];

	err = nla_parse_nested_deprecated(cda, CTA_SEQADJ_MAX, attr,
					  seqadj_policy, NULL);
	if (err < 0)
		return err;

	if (!cda[CTA_SEQADJ_CORRECTION_POS])
		return -EINVAL;

	seq->correction_pos =
		ntohl(nla_get_be32(cda[CTA_SEQADJ_CORRECTION_POS]));

	if (!cda[CTA_SEQADJ_OFFSET_BEFORE])
		return -EINVAL;

	seq->offset_before =
		ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_BEFORE]));

	if (!cda[CTA_SEQADJ_OFFSET_AFTER])
		return -EINVAL;

	seq->offset_after =
		ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_AFTER]));

	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_change_synproxy(struct nf_conn *ct,
				     const struct nlattr * const cda[])
{
	struct nf_conn_synproxy *synproxy = nfct_synproxy(ct);
	struct nlattr *tb[CTA_SYNPROXY_MAX + 1];
	int err;

	if (!synproxy)
		return 0;

	err = nla_parse_nested_deprecated(tb, CTA_SYNPROXY_MAX,
					  cda[CTA_SYNPROXY], synproxy_policy,
					  NULL);
	if (err < 0)
		return err;

	if (!tb[CTA_SYNPROXY_ISN] ||
	    !tb[CTA_SYNPROXY_ITS] ||
	    !tb[CTA_SYNPROXY_TSOFF])
		return -EINVAL;

	synproxy->isn = ntohl(nla_get_be32(tb[CTA_SYNPROXY_ISN]));
	synproxy->its = ntohl(nla_get_be32(tb[CTA_SYNPROXY_ITS]));
	synproxy->tsoff = ntohl(nla_get_be32(tb[CTA_SYNPROXY_TSOFF]));

	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

static __be32 nf_expect_get_id(const struct nf_conntrack_expect *exp)
{
	static __read_mostly siphash_key_t exp_id_seed;
	unsigned long a, b, c, d;

	net_get_random_once(&exp_id_seed, sizeof(exp_id_seed));

	a = (unsigned long)exp;
	b = (unsigned long)exp->helper;
	c = (unsigned long)exp->master;
	d = (unsigned long)siphash(&exp->tuple, sizeof(exp->tuple), &exp_id_seed);

#ifdef CONFIG_64BIT
	return (__force __be32)siphash_4u64((u64)a, (u64)b, (u64)c, (u64)d, &exp_id_seed);
#else
	return (__force __be32)siphash_4u32((u32)a, (u32)b, (u32)c, (u32)d, &exp_id_seed);
#endif
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[])
{
	unsigned long d;
	unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS]));
	d = ct->status ^ status;

	if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING))
		/* unchangeable */
		return -EBUSY;

	if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
		/* SEEN_REPLY bit can only be set */
		return -EBUSY;

	if (d & IPS_ASSURED && !(status & IPS_ASSURED))
		/* ASSURED bit can only be set */
		return -EBUSY;

	__ctnetlink_change_status(ct, status, 0);
	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct)
{
	struct nlattr *nest_secctx;
	int len, ret;
	char *secctx;

	ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
	if (ret)
		return 0;

	ret = -1;
	nest_secctx = nla_nest_start(skb, CTA_SECCTX);
	if (!nest_secctx)
		goto nla_put_failure;

	if (nla_put_string(skb, CTA_SECCTX_NAME, secctx))
		goto nla_put_failure;
	nla_nest_end(skb, nest_secctx);

	ret = 0;
nla_put_failure:
	security_release_secctx(secctx, len);
	return ret;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_dump_tuples(struct sk_buff *skb,
				 const struct nf_conntrack_tuple *tuple)
{
	const struct nf_conntrack_l4proto *l4proto;
	int ret;

	rcu_read_lock();
	ret = ctnetlink_dump_tuples_ip(skb, tuple);

	if (ret >= 0) {
		l4proto = nf_ct_l4proto_find(tuple->dst.protonum);
		ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto);
	}
	rcu_read_unlock();
	return ret;
}

Project: linux
File: nf_conntrack_netlink.c

static void __exit ctnetlink_exit(void)
{
	unregister_pernet_subsys(&ctnetlink_net_ops);
	nfnetlink_subsys_unregister(&ctnl_exp_subsys);
	nfnetlink_subsys_unregister(&ctnl_subsys);
#ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
	RCU_INIT_POINTER(nfnl_ct_hook, NULL);
#endif
	synchronize_rcu();
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct)
{
	if (nla_put_be32(skb, CTA_STATUS, htonl(ct->status)))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_dump_info(struct sk_buff *skb, struct nf_conn *ct)
{
	if (ctnetlink_dump_status(skb, ct) < 0 ||
	    ctnetlink_dump_mark(skb, ct) < 0 ||
	    ctnetlink_dump_secctx(skb, ct) < 0 ||
	    ctnetlink_dump_id(skb, ct) < 0 ||
	    ctnetlink_dump_use(skb, ct) < 0 ||
	    ctnetlink_dump_master(skb, ct) < 0)
		return -1;

	if (!test_bit(IPS_OFFLOAD_BIT, &ct->status) &&
	    (ctnetlink_dump_timeout(skb, ct) < 0 ||
	     ctnetlink_dump_protoinfo(skb, ct) < 0))
		return -1;

	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_filter_match_tuple(struct nf_conntrack_tuple *filter_tuple,
					struct nf_conntrack_tuple *ct_tuple,
					u_int32_t flags, int family)
{
	switch (family) {
	case NFPROTO_IPV4:
		if ((flags & CTA_FILTER_FLAG(CTA_IP_SRC)) &&
		    filter_tuple->src.u3.ip != ct_tuple->src.u3.ip)
			return  0;

		if ((flags & CTA_FILTER_FLAG(CTA_IP_DST)) &&
		    filter_tuple->dst.u3.ip != ct_tuple->dst.u3.ip)
			return  0;
		break;
	case NFPROTO_IPV6:
		if ((flags & CTA_FILTER_FLAG(CTA_IP_SRC)) &&
		    !ipv6_addr_cmp(&filter_tuple->src.u3.in6,
				   &ct_tuple->src.u3.in6))
			return 0;

		if ((flags & CTA_FILTER_FLAG(CTA_IP_DST)) &&
		    !ipv6_addr_cmp(&filter_tuple->dst.u3.in6,
				   &ct_tuple->dst.u3.in6))
			return 0;
		break;
	}

	if ((flags & CTA_FILTER_FLAG(CTA_PROTO_NUM)) &&
	    filter_tuple->dst.protonum != ct_tuple->dst.protonum)
		return 0;

	switch (ct_tuple->dst.protonum) {
	case IPPROTO_TCP:
	case IPPROTO_UDP:
		if ((flags & CTA_FILTER_FLAG(CTA_PROTO_SRC_PORT)) &&
		    filter_tuple->src.u.tcp.port != ct_tuple->src.u.tcp.port)
			return 0;

		if ((flags & CTA_FILTER_FLAG(CTA_PROTO_DST_PORT)) &&
		    filter_tuple->dst.u.tcp.port != ct_tuple->dst.u.tcp.port)
			return 0;
		break;
	case IPPROTO_ICMP:
		if ((flags & CTA_FILTER_FLAG(CTA_PROTO_ICMP_TYPE)) &&
		    filter_tuple->dst.u.icmp.type != ct_tuple->dst.u.icmp.type)
			return 0;
		if ((flags & CTA_FILTER_FLAG(CTA_PROTO_ICMP_CODE)) &&
		    filter_tuple->dst.u.icmp.code != ct_tuple->dst.u.icmp.code)
			return 0;
		if ((flags & CTA_FILTER_FLAG(CTA_PROTO_ICMP_ID)) &&
		    filter_tuple->src.u.icmp.id != ct_tuple->src.u.icmp.id)
			return 0;
		break;
	case IPPROTO_ICMPV6:
		if ((flags & CTA_FILTER_FLAG(CTA_PROTO_ICMPV6_TYPE)) &&
		    filter_tuple->dst.u.icmp.type != ct_tuple->dst.u.icmp.type)
			return 0;
		if ((flags & CTA_FILTER_FLAG(CTA_PROTO_ICMPV6_CODE)) &&
		    filter_tuple->dst.u.icmp.code != ct_tuple->dst.u.icmp.code)
			return 0;
		if ((flags & CTA_FILTER_FLAG(CTA_PROTO_ICMPV6_ID)) &&
		    filter_tuple->src.u.icmp.id != ct_tuple->src.u.icmp.id)
			return 0;
		break;
	}

	return 1;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_dump_unconfirmed(struct sk_buff *skb, struct netlink_callback *cb)
{
	return ctnetlink_dump_list(skb, cb, false);
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_flush_iterate(struct nf_conn *ct, void *data)
{
	if (test_bit(IPS_OFFLOAD_BIT, &ct->status))
		return 0;

	return ctnetlink_filter_match(ct, data);
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_done_list(struct netlink_callback *cb)
{
	if (cb->args[1])
		nf_ct_put((struct nf_conn *)cb->args[1]);
	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_alloc_filter(const struct nlattr * const cda[], u8 family)
{
	struct ctnetlink_filter *filter;
	int err;

#ifndef CONFIG_NF_CONNTRACK_MARK
	if (cda[CTA_MARK] || cda[CTA_MARK_MASK])
		return ERR_PTR(-EOPNOTSUPP);
#endif

	filter = kzalloc(sizeof(*filter), GFP_KERNEL);
	if (filter == NULL)
		return ERR_PTR(-ENOMEM);

	filter->family = family;

#ifdef CONFIG_NF_CONNTRACK_MARK
	if (cda[CTA_MARK]) {
		filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK]));
		filter->cta_flags |= CTA_FILTER_FLAG(CTA_MARK);

		if (cda[CTA_MARK_MASK]) {
			filter->mark.mask = ntohl(nla_get_be32(cda[CTA_MARK_MASK]));
			filter->cta_flags |= CTA_FILTER_FLAG(CTA_MARK_MASK);
		} else {
			filter->mark.mask = 0xffffffff;
		}
	} else if (cda[CTA_MARK_MASK]) {
		err = -EINVAL;
		goto err_filter;
	}
#endif
	if (!cda[CTA_FILTER])
		return filter;

	err = ctnetlink_parse_zone(cda[CTA_ZONE], &filter->zone);
	if (err < 0)
		goto err_filter;

	err = ctnetlink_parse_filter(cda[CTA_FILTER], filter);
	if (err < 0)
		goto err_filter;

	if (filter->orig_flags) {
		if (!cda[CTA_TUPLE_ORIG]) {
			err = -EINVAL;
			goto err_filter;
		}

		err = ctnetlink_parse_tuple_filter(cda, &filter->orig,
						   CTA_TUPLE_ORIG,
						   filter->family,
						   &filter->zone,
						   filter->orig_flags);
		if (err < 0)
			goto err_filter;
	}

	if (filter->reply_flags) {
		if (!cda[CTA_TUPLE_REPLY]) {
			err = -EINVAL;
			goto err_filter;
		}

		err = ctnetlink_parse_tuple_filter(cda, &filter->reply,
						   CTA_TUPLE_REPLY,
						   filter->family,
						   &filter->zone,
						   filter->orig_flags);
		if (err < 0) {
			err = -EINVAL;
			goto err_filter;
		}
	}

	return filter;

err_filter:
	kfree(filter);

	return ERR_PTR(err);
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
{
	struct net *net = sock_net(skb->sk);
	struct nf_conntrack_expect *exp, *last;
	struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
	u_int8_t l3proto = nfmsg->nfgen_family;

	rcu_read_lock();
	last = (struct nf_conntrack_expect *)cb->args[1];
	for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) {
restart:
		hlist_for_each_entry_rcu(exp, &nf_ct_expect_hash[cb->args[0]],
					 hnode) {
			if (l3proto && exp->tuple.src.l3num != l3proto)
				continue;

			if (!net_eq(nf_ct_net(exp->master), net))
				continue;

			if (cb->args[1]) {
				if (exp != last)
					continue;
				cb->args[1] = 0;
			}
			if (ctnetlink_exp_fill_info(skb,
						    NETLINK_CB(cb->skb).portid,
						    cb->nlh->nlmsg_seq,
						    IPCTNL_MSG_EXP_NEW,
						    exp) < 0) {
				if (!refcount_inc_not_zero(&exp->use))
					continue;
				cb->args[1] = (unsigned long)exp;
				goto out;
			}
		}
		if (cb->args[1]) {
			cb->args[1] = 0;
			goto restart;
		}
	}
out:
	rcu_read_unlock();
	if (last)
		nf_ct_expect_put(last);

	return skb->len;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_dump_tuples_ip(struct sk_buff *skb,
				    const struct nf_conntrack_tuple *tuple)
{
	int ret = 0;
	struct nlattr *nest_parms;

	nest_parms = nla_nest_start(skb, CTA_TUPLE_IP);
	if (!nest_parms)
		goto nla_put_failure;

	switch (tuple->src.l3num) {
	case NFPROTO_IPV4:
		ret = ipv4_tuple_to_nlattr(skb, tuple);
		break;
	case NFPROTO_IPV6:
		ret = ipv6_tuple_to_nlattr(skb, tuple);
		break;
	}

	nla_nest_end(skb, nest_parms);

	return ret;

nla_put_failure:
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_create_conntrack(struct net *net,
			   const struct nf_conntrack_zone *zone,
			   const struct nlattr * const cda[],
			   struct nf_conntrack_tuple *otuple,
			   struct nf_conntrack_tuple *rtuple,
			   u8 u3)
{
	struct nf_conn *ct;
	int err = -EINVAL;
	struct nf_conntrack_helper *helper;
	struct nf_conn_tstamp *tstamp;
	u64 timeout;

	ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC);
	if (IS_ERR(ct))
		return ERR_PTR(-ENOMEM);

	if (!cda[CTA_TIMEOUT])
		goto err1;

	timeout = (u64)ntohl(nla_get_be32(cda[CTA_TIMEOUT])) * HZ;
	if (timeout > INT_MAX)
		timeout = INT_MAX;
	ct->timeout = (u32)timeout + nfct_time_stamp;

	rcu_read_lock();
 	if (cda[CTA_HELP]) {
		char *helpname = NULL;
		struct nlattr *helpinfo = NULL;

		err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
 		if (err < 0)
			goto err2;

		helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
						    nf_ct_protonum(ct));
		if (helper == NULL) {
			rcu_read_unlock();
#ifdef CONFIG_MODULES
			if (request_module("nfct-helper-%s", helpname) < 0) {
				err = -EOPNOTSUPP;
				goto err1;
			}

			rcu_read_lock();
			helper = __nf_conntrack_helper_find(helpname,
							    nf_ct_l3num(ct),
							    nf_ct_protonum(ct));
			if (helper) {
				err = -EAGAIN;
				goto err2;
			}
			rcu_read_unlock();
#endif
			err = -EOPNOTSUPP;
			goto err1;
		} else {
			struct nf_conn_help *help;

			help = nf_ct_helper_ext_add(ct, GFP_ATOMIC);
			if (help == NULL) {
				err = -ENOMEM;
				goto err2;
			}
			/* set private helper data if allowed. */
			if (helper->from_nlattr)
				helper->from_nlattr(helpinfo, ct);

			/* not in hash table yet so not strictly necessary */
			RCU_INIT_POINTER(help->helper, helper);
		}
	} else {
		/* try an implicit helper assignation */
		err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC);
		if (err < 0)
			goto err2;
	}

	err = ctnetlink_setup_nat(ct, cda);
	if (err < 0)
		goto err2;

	nf_ct_acct_ext_add(ct, GFP_ATOMIC);
	nf_ct_tstamp_ext_add(ct, GFP_ATOMIC);
	nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC);
	nf_ct_labels_ext_add(ct);
	nfct_seqadj_ext_add(ct);
	nfct_synproxy_ext_add(ct);

	/* we must add conntrack extensions before confirmation. */
	ct->status |= IPS_CONFIRMED;

	if (cda[CTA_STATUS]) {
		err = ctnetlink_change_status(ct, cda);
		if (err < 0)
			goto err2;
	}

	if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) {
		err = ctnetlink_change_seq_adj(ct, cda);
		if (err < 0)
			goto err2;
	}

	memset(&ct->proto, 0, sizeof(ct->proto));
	if (cda[CTA_PROTOINFO]) {
		err = ctnetlink_change_protoinfo(ct, cda);
		if (err < 0)
			goto err2;
	}

	if (cda[CTA_SYNPROXY]) {
		err = ctnetlink_change_synproxy(ct, cda);
		if (err < 0)
			goto err2;
	}

#if defined(CONFIG_NF_CONNTRACK_MARK)
	if (cda[CTA_MARK])
		ctnetlink_change_mark(ct, cda);
#endif

	/* setup master conntrack: this is a confirmed expectation */
	if (cda[CTA_TUPLE_MASTER]) {
		struct nf_conntrack_tuple master;
		struct nf_conntrack_tuple_hash *master_h;
		struct nf_conn *master_ct;

		err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER,
					    u3, NULL);
		if (err < 0)
			goto err2;

		master_h = nf_conntrack_find_get(net, zone, &master);
		if (master_h == NULL) {
			err = -ENOENT;
			goto err2;
		}
		master_ct = nf_ct_tuplehash_to_ctrack(master_h);
		__set_bit(IPS_EXPECTED_BIT, &ct->status);
		ct->master = master_ct;
	}
	tstamp = nf_conn_tstamp_find(ct);
	if (tstamp)
		tstamp->start = ktime_get_real_ns();

	err = nf_conntrack_hash_check_insert(ct);
	if (err < 0)
		goto err2;

	rcu_read_unlock();

	return ct;

err2:
	rcu_read_unlock();
err1:
	nf_conntrack_free(ct);
	return ERR_PTR(err);
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_exp_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
{
	int cpu;
	struct net *net = sock_net(skb->sk);

	if (cb->args[0] == nr_cpu_ids)
		return 0;

	for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
		const struct ip_conntrack_stat *st;

		if (!cpu_possible(cpu))
			continue;

		st = per_cpu_ptr(net->ct.stat, cpu);
		if (ctnetlink_exp_stat_fill_info(skb, NETLINK_CB(cb->skb).portid,
						 cb->nlh->nlmsg_seq,
						 cpu, st) < 0)
			break;
	}
	cb->args[0] = cpu;

	return skb->len;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct,
		     enum ip_conntrack_info ctinfo,
		     u_int16_t ct_attr, u_int16_t ct_info_attr)
{
	struct nlattr *nest_parms;

	nest_parms = nla_nest_start(skb, ct_attr);
	if (!nest_parms)
		goto nla_put_failure;

	if (__ctnetlink_glue_build(skb, ct) < 0)
		goto nla_put_failure;

	nla_nest_end(skb, nest_parms);

	if (nla_put_be32(skb, ct_info_attr, htonl(ctinfo)))
		goto nla_put_failure;

	return 0;

nla_put_failure:
	return -ENOSPC;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_parse_tuple(const struct nlattr * const cda[],
		      struct nf_conntrack_tuple *tuple, u32 type,
		      u_int8_t l3num, struct nf_conntrack_zone *zone)
{
	return ctnetlink_parse_tuple_filter(cda, tuple, type, l3num, zone,
					    CTA_FILTER_FLAG(ALL));
}

Project: linux
File: nf_conntrack_netlink.c

static int __init ctnetlink_init(void)
{
	int ret;

	ret = nfnetlink_subsys_register(&ctnl_subsys);
	if (ret < 0) {
		pr_err("ctnetlink_init: cannot register with nfnetlink.\n");
		goto err_out;
	}

	ret = nfnetlink_subsys_register(&ctnl_exp_subsys);
	if (ret < 0) {
		pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n");
		goto err_unreg_subsys;
	}

	ret = register_pernet_subsys(&ctnetlink_net_ops);
	if (ret < 0) {
		pr_err("ctnetlink_init: cannot register pernet operations\n");
		goto err_unreg_exp_subsys;
	}
#ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT
	/* setup interaction between nf_queue and nf_conntrack_netlink. */
	RCU_INIT_POINTER(nfnl_ct_hook, &ctnetlink_glue_hook);
#endif
	return 0;

err_unreg_exp_subsys:
	nfnetlink_subsys_unregister(&ctnl_exp_subsys);
err_unreg_subsys:
	nfnetlink_subsys_unregister(&ctnl_subsys);
err_out:
	return ret;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
{
	struct nf_conntrack_expect *exp, *last;
	struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
	struct nf_conn *ct = cb->data;
	struct nf_conn_help *help = nfct_help(ct);
	u_int8_t l3proto = nfmsg->nfgen_family;

	if (cb->args[0])
		return 0;

	rcu_read_lock();
	last = (struct nf_conntrack_expect *)cb->args[1];
restart:
	hlist_for_each_entry_rcu(exp, &help->expectations, lnode) {
		if (l3proto && exp->tuple.src.l3num != l3proto)
			continue;
		if (cb->args[1]) {
			if (exp != last)
				continue;
			cb->args[1] = 0;
		}
		if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).portid,
					    cb->nlh->nlmsg_seq,
					    IPCTNL_MSG_EXP_NEW,
					    exp) < 0) {
			if (!refcount_inc_not_zero(&exp->use))
				continue;
			cb->args[1] = (unsigned long)exp;
			goto out;
		}
	}
	if (cb->args[1]) {
		cb->args[1] = 0;
		goto restart;
	}
	cb->args[0] = 1;
out:
	rcu_read_unlock();
	if (last)
		nf_ct_expect_put(last);

	return skb->len;
}

Project: linux
File: nf_conntrack_netlink.c

static int __net_init ctnetlink_net_init(struct net *net)
{
#ifdef CONFIG_NF_CONNTRACK_EVENTS
	int ret;

	ret = nf_conntrack_register_notifier(net, &ctnl_notifier);
	if (ret < 0) {
		pr_err("ctnetlink_init: cannot register notifier.\n");
		goto err_out;
	}

	ret = nf_ct_expect_register_notifier(net, &ctnl_notifier_exp);
	if (ret < 0) {
		pr_err("ctnetlink_init: cannot expect register notifier.\n");
		goto err_unreg_notifier;
	}
#endif
	return 0;

#ifdef CONFIG_NF_CONNTRACK_EVENTS
err_unreg_notifier:
	nf_conntrack_unregister_notifier(net, &ctnl_notifier);
err_out:
	return ret;
#endif
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_dump_ct_synproxy(struct sk_buff *skb, struct nf_conn *ct)
{
	struct nf_conn_synproxy *synproxy = nfct_synproxy(ct);
	struct nlattr *nest_parms;

	if (!synproxy)
		return 0;

	nest_parms = nla_nest_start(skb, CTA_SYNPROXY);
	if (!nest_parms)
		goto nla_put_failure;

	if (nla_put_be32(skb, CTA_SYNPROXY_ISN, htonl(synproxy->isn)) ||
	    nla_put_be32(skb, CTA_SYNPROXY_ITS, htonl(synproxy->its)) ||
	    nla_put_be32(skb, CTA_SYNPROXY_TSOFF, htonl(synproxy->tsoff)))
		goto nla_put_failure;

	nla_nest_end(skb, nest_parms);

	return 0;

nla_put_failure:
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

static size_t ctnetlink_nlmsg_size(const struct nf_conn *ct)
{
	return NLMSG_ALIGN(sizeof(struct nfgenmsg))
	       + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
	       + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
	       + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
	       + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
	       + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
	       + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
	       + ctnetlink_acct_size(ct)
	       + ctnetlink_timestamp_size(ct)
	       + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
	       + nla_total_size(0) /* CTA_PROTOINFO */
	       + nla_total_size(0) /* CTA_HELP */
	       + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
	       + ctnetlink_secctx_size(ct)
#if IS_ENABLED(CONFIG_NF_NAT)
	       + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
	       + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
#endif
#ifdef CONFIG_NF_CONNTRACK_MARK
	       + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
#endif
#ifdef CONFIG_NF_CONNTRACK_ZONES
	       + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */
#endif
	       + ctnetlink_proto_size(ct)
	       + ctnetlink_label_size(ct)
	       ;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_del_expect(struct net *net, struct sock *ctnl,
				struct sk_buff *skb, const struct nlmsghdr *nlh,
				const struct nlattr * const cda[],
				struct netlink_ext_ack *extack)
{
	struct nf_conntrack_expect *exp;
	struct nf_conntrack_tuple tuple;
	struct nfgenmsg *nfmsg = nlmsg_data(nlh);
	u_int8_t u3 = nfmsg->nfgen_family;
	struct nf_conntrack_zone zone;
	int err;

	if (cda[CTA_EXPECT_TUPLE]) {
		/* delete a single expect by tuple */
		err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
		if (err < 0)
			return err;

		err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
					    u3, NULL);
		if (err < 0)
			return err;

		/* bump usage count to 2 */
		exp = nf_ct_expect_find_get(net, &zone, &tuple);
		if (!exp)
			return -ENOENT;

		if (cda[CTA_EXPECT_ID]) {
			__be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);
			if (ntohl(id) != (u32)(unsigned long)exp) {
				nf_ct_expect_put(exp);
				return -ENOENT;
			}
		}

		/* after list removal, usage count == 1 */
		spin_lock_bh(&nf_conntrack_expect_lock);
		if (del_timer(&exp->timeout)) {
			nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).portid,
						   nlmsg_report(nlh));
			nf_ct_expect_put(exp);
		}
		spin_unlock_bh(&nf_conntrack_expect_lock);
		/* have to put what we 'get' above.
		 * after this line usage count == 0 */
		nf_ct_expect_put(exp);
	} else if (cda[CTA_EXPECT_HELP_NAME]) {
		char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]);

		nf_ct_expect_iterate_net(net, expect_iter_name, name,
					 NETLINK_CB(skb).portid,
					 nlmsg_report(nlh));
	} else {
		/* This basically means we have to flush everything*/
		nf_ct_expect_iterate_net(net, expect_iter_all, NULL,
					 NETLINK_CB(skb).portid,
					 nlmsg_report(nlh));
	}

	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_change_expect(struct nf_conntrack_expect *x,
			const struct nlattr * const cda[])
{
	if (cda[CTA_EXPECT_TIMEOUT]) {
		if (!del_timer(&x->timeout))
			return -ETIME;

		x->timeout.expires = jiffies +
			ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
		add_timer(&x->timeout);
	}
	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_parse_tuple_proto(struct nlattr *attr,
				       struct nf_conntrack_tuple *tuple,
				       u_int32_t flags)
{
	const struct nf_conntrack_l4proto *l4proto;
	struct nlattr *tb[CTA_PROTO_MAX+1];
	int ret = 0;

	ret = nla_parse_nested_deprecated(tb, CTA_PROTO_MAX, attr,
					  proto_nla_policy, NULL);
	if (ret < 0)
		return ret;

	if (!(flags & CTA_FILTER_FLAG(CTA_PROTO_NUM)))
		return 0;

	if (!tb[CTA_PROTO_NUM])
		return -EINVAL;

	tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]);

	rcu_read_lock();
	l4proto = nf_ct_l4proto_find(tuple->dst.protonum);

	if (likely(l4proto->nlattr_to_tuple)) {
		ret = nla_validate_nested_deprecated(attr, CTA_PROTO_MAX,
						     l4proto->nla_policy,
						     NULL);
		if (ret == 0)
			ret = l4proto->nlattr_to_tuple(tb, tuple, flags);
	}

	rcu_read_unlock();

	return ret;
}

Project: linux
File: nf_conntrack_netlink.c

static size_t ctnetlink_proto_size(const struct nf_conn *ct)
{
	const struct nf_conntrack_l4proto *l4proto;
	size_t len, len4 = 0;

	len = nla_policy_len(cta_ip_nla_policy, CTA_IP_MAX + 1);
	len *= 3u; /* ORIG, REPLY, MASTER */

	l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
	len += l4proto->nlattr_size;
	if (l4proto->nlattr_tuple_size) {
		len4 = l4proto->nlattr_tuple_size();
		len4 *= 3u; /* ORIG, REPLY, MASTER */
	}

	return len + len4;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_create_expect(struct net *net,
			const struct nf_conntrack_zone *zone,
			const struct nlattr * const cda[],
			u_int8_t u3, u32 portid, int report)
{
	struct nf_conntrack_tuple tuple, mask, master_tuple;
	struct nf_conntrack_tuple_hash *h = NULL;
	struct nf_conntrack_helper *helper = NULL;
	struct nf_conntrack_expect *exp;
	struct nf_conn *ct;
	int err;

	/* caller guarantees that those three CTA_EXPECT_* exist */
	err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
				    u3, NULL);
	if (err < 0)
		return err;
	err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK,
				    u3, NULL);
	if (err < 0)
		return err;
	err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER,
				    u3, NULL);
	if (err < 0)
		return err;

	/* Look for master conntrack of this expectation */
	h = nf_conntrack_find_get(net, zone, &master_tuple);
	if (!h)
		return -ENOENT;
	ct = nf_ct_tuplehash_to_ctrack(h);

	rcu_read_lock();
	if (cda[CTA_EXPECT_HELP_NAME]) {
		const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]);

		helper = __nf_conntrack_helper_find(helpname, u3,
						    nf_ct_protonum(ct));
		if (helper == NULL) {
			rcu_read_unlock();
#ifdef CONFIG_MODULES
			if (request_module("nfct-helper-%s", helpname) < 0) {
				err = -EOPNOTSUPP;
				goto err_ct;
			}
			rcu_read_lock();
			helper = __nf_conntrack_helper_find(helpname, u3,
							    nf_ct_protonum(ct));
			if (helper) {
				err = -EAGAIN;
				goto err_rcu;
			}
			rcu_read_unlock();
#endif
			err = -EOPNOTSUPP;
			goto err_ct;
		}
	}

	exp = ctnetlink_alloc_expect(cda, ct, helper, &tuple, &mask);
	if (IS_ERR(exp)) {
		err = PTR_ERR(exp);
		goto err_rcu;
	}

	err = nf_ct_expect_related_report(exp, portid, report, 0);
	nf_ct_expect_put(exp);
err_rcu:
	rcu_read_unlock();
err_ct:
	nf_ct_put(ct);
	return err;
}

Project: linux
File: nf_conntrack_netlink.c

static inline size_t ctnetlink_timestamp_size(const struct nf_conn *ct)
{
#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
	if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP))
		return 0;
	return nla_total_size(0) + 2 * nla_total_size_64bit(sizeof(uint64_t));
#else
	return 0;
#endif
}

Project: linux
File: nf_conntrack_netlink.c

dump_ct_seq_adj(struct sk_buff *skb, const struct nf_ct_seqadj *seq, int type)
{
	struct nlattr *nest_parms;

	nest_parms = nla_nest_start(skb, type);
	if (!nest_parms)
		goto nla_put_failure;

	if (nla_put_be32(skb, CTA_SEQADJ_CORRECTION_POS,
			 htonl(seq->correction_pos)) ||
	    nla_put_be32(skb, CTA_SEQADJ_OFFSET_BEFORE,
			 htonl(seq->offset_before)) ||
	    nla_put_be32(skb, CTA_SEQADJ_OFFSET_AFTER,
			 htonl(seq->offset_after)))
		goto nla_put_failure;

	nla_nest_end(skb, nest_parms);

	return 0;

nla_put_failure:
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_parse_tuple_zone(struct nlattr *attr, enum ctattr_type type,
			   struct nf_conntrack_zone *zone)
{
	int ret;

	if (zone->id != NF_CT_DEFAULT_ZONE_ID)
		return -EINVAL;

	ret = ctnetlink_parse_zone(attr, zone);
	if (ret < 0)
		return ret;

	if (type == CTA_TUPLE_REPLY)
		zone->dir = NF_CT_ZONE_DIR_REPL;
	else
		zone->dir = NF_CT_ZONE_DIR_ORIG;

	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_new_conntrack(struct net *net, struct sock *ctnl,
				   struct sk_buff *skb,
				   const struct nlmsghdr *nlh,
				   const struct nlattr * const cda[],
				   struct netlink_ext_ack *extack)
{
	struct nf_conntrack_tuple otuple, rtuple;
	struct nf_conntrack_tuple_hash *h = NULL;
	struct nfgenmsg *nfmsg = nlmsg_data(nlh);
	struct nf_conn *ct;
	u_int8_t u3 = nfmsg->nfgen_family;
	struct nf_conntrack_zone zone;
	int err;

	err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
	if (err < 0)
		return err;

	if (cda[CTA_TUPLE_ORIG]) {
		err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG,
					    u3, &zone);
		if (err < 0)
			return err;
	}

	if (cda[CTA_TUPLE_REPLY]) {
		err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY,
					    u3, &zone);
		if (err < 0)
			return err;
	}

	if (cda[CTA_TUPLE_ORIG])
		h = nf_conntrack_find_get(net, &zone, &otuple);
	else if (cda[CTA_TUPLE_REPLY])
		h = nf_conntrack_find_get(net, &zone, &rtuple);

	if (h == NULL) {
		err = -ENOENT;
		if (nlh->nlmsg_flags & NLM_F_CREATE) {
			enum ip_conntrack_events events;

			if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY])
				return -EINVAL;
			if (otuple.dst.protonum != rtuple.dst.protonum)
				return -EINVAL;

			ct = ctnetlink_create_conntrack(net, &zone, cda, &otuple,
							&rtuple, u3);
			if (IS_ERR(ct))
				return PTR_ERR(ct);

			err = 0;
			if (test_bit(IPS_EXPECTED_BIT, &ct->status))
				events = 1 << IPCT_RELATED;
			else
				events = 1 << IPCT_NEW;

			if (cda[CTA_LABELS] &&
			    ctnetlink_attach_labels(ct, cda) == 0)
				events |= (1 << IPCT_LABEL);

			nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
						      (1 << IPCT_ASSURED) |
						      (1 << IPCT_HELPER) |
						      (1 << IPCT_PROTOINFO) |
						      (1 << IPCT_SEQADJ) |
						      (1 << IPCT_MARK) |
						      (1 << IPCT_SYNPROXY) |
						      events,
						      ct, NETLINK_CB(skb).portid,
						      nlmsg_report(nlh));
			nf_ct_put(ct);
		}

		return err;
	}
	/* implicit 'else' */

	err = -EEXIST;
	ct = nf_ct_tuplehash_to_ctrack(h);
	if (!(nlh->nlmsg_flags & NLM_F_EXCL)) {
		err = ctnetlink_change_conntrack(ct, cda);
		if (err == 0) {
			nf_conntrack_eventmask_report((1 << IPCT_REPLY) |
						      (1 << IPCT_ASSURED) |
						      (1 << IPCT_HELPER) |
						      (1 << IPCT_LABEL) |
						      (1 << IPCT_PROTOINFO) |
						      (1 << IPCT_SEQADJ) |
						      (1 << IPCT_MARK) |
						      (1 << IPCT_SYNPROXY),
						      ct, NETLINK_CB(skb).portid,
						      nlmsg_report(nlh));
		}
	}

	nf_ct_put(ct);
	return err;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_glue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct)
{
	int err;

	if (cda[CTA_TIMEOUT]) {
		err = ctnetlink_change_timeout(ct, cda);
		if (err < 0)
			return err;
	}
	if (cda[CTA_STATUS]) {
		err = ctnetlink_update_status(ct, cda);
		if (err < 0)
			return err;
	}
	if (cda[CTA_HELP]) {
		err = ctnetlink_change_helper(ct, cda);
		if (err < 0)
			return err;
	}
	if (cda[CTA_LABELS]) {
		err = ctnetlink_attach_labels(ct, cda);
		if (err < 0)
			return err;
	}
#if defined(CONFIG_NF_CONNTRACK_MARK)
	if (cda[CTA_MARK]) {
		ctnetlink_change_mark(ct, cda);
	}
#endif
	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_dump_extinfo(struct sk_buff *skb,
				  struct nf_conn *ct, u32 type)
{
	if (ctnetlink_dump_acct(skb, ct, type) < 0 ||
	    ctnetlink_dump_timestamp(skb, ct) < 0 ||
	    ctnetlink_dump_helpinfo(skb, ct) < 0 ||
	    ctnetlink_dump_labels(skb, ct) < 0 ||
	    ctnetlink_dump_ct_seq_adj(skb, ct) < 0 ||
	    ctnetlink_dump_ct_synproxy(skb, ct) < 0)
		return -1;

	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

static int __ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct)
{
	const struct nf_conntrack_zone *zone;
	struct nlattr *nest_parms;

	zone = nf_ct_zone(ct);

	nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG);
	if (!nest_parms)
		goto nla_put_failure;
	if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
		goto nla_put_failure;
	if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
				   NF_CT_ZONE_DIR_ORIG) < 0)
		goto nla_put_failure;
	nla_nest_end(skb, nest_parms);

	nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY);
	if (!nest_parms)
		goto nla_put_failure;
	if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
		goto nla_put_failure;
	if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
				   NF_CT_ZONE_DIR_REPL) < 0)
		goto nla_put_failure;
	nla_nest_end(skb, nest_parms);

	if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
				   NF_CT_DEFAULT_ZONE_DIR) < 0)
		goto nla_put_failure;

	if (ctnetlink_dump_id(skb, ct) < 0)
		goto nla_put_failure;

	if (ctnetlink_dump_status(skb, ct) < 0)
		goto nla_put_failure;

	if (ctnetlink_dump_timeout(skb, ct) < 0)
		goto nla_put_failure;

	if (ctnetlink_dump_protoinfo(skb, ct) < 0)
		goto nla_put_failure;

	if (ctnetlink_dump_helpinfo(skb, ct) < 0)
		goto nla_put_failure;

#ifdef CONFIG_NF_CONNTRACK_SECMARK
	if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0)
		goto nla_put_failure;
#endif
	if (ct->master && ctnetlink_dump_master(skb, ct) < 0)
		goto nla_put_failure;

	if ((ct->status & IPS_SEQ_ADJUST) &&
	    ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
		goto nla_put_failure;

	if (ctnetlink_dump_ct_synproxy(skb, ct) < 0)
		goto nla_put_failure;

#ifdef CONFIG_NF_CONNTRACK_MARK
	if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0)
		goto nla_put_failure;
#endif
	if (ctnetlink_dump_labels(skb, ct) < 0)
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -ENOSPC;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct)
{
	long timeout = nf_ct_expires(ct) / HZ;

	if (nla_put_be32(skb, CTA_TIMEOUT, htonl(timeout)))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
		    struct nf_conn *ct, bool extinfo, unsigned int flags)
{
	const struct nf_conntrack_zone *zone;
	struct nlmsghdr *nlh;
	struct nfgenmsg *nfmsg;
	struct nlattr *nest_parms;
	unsigned int event;

	if (portid)
		flags |= NLM_F_MULTI;
	event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, IPCTNL_MSG_CT_NEW);
	nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
	if (nlh == NULL)
		goto nlmsg_failure;

	nfmsg = nlmsg_data(nlh);
	nfmsg->nfgen_family = nf_ct_l3num(ct);
	nfmsg->version      = NFNETLINK_V0;
	nfmsg->res_id	    = 0;

	zone = nf_ct_zone(ct);

	nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG);
	if (!nest_parms)
		goto nla_put_failure;
	if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
		goto nla_put_failure;
	if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
				   NF_CT_ZONE_DIR_ORIG) < 0)
		goto nla_put_failure;
	nla_nest_end(skb, nest_parms);

	nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY);
	if (!nest_parms)
		goto nla_put_failure;
	if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
		goto nla_put_failure;
	if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
				   NF_CT_ZONE_DIR_REPL) < 0)
		goto nla_put_failure;
	nla_nest_end(skb, nest_parms);

	if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
				   NF_CT_DEFAULT_ZONE_DIR) < 0)
		goto nla_put_failure;

	if (ctnetlink_dump_info(skb, ct) < 0)
		goto nla_put_failure;
	if (extinfo && ctnetlink_dump_extinfo(skb, ct, type) < 0)
		goto nla_put_failure;

	nlmsg_end(skb, nlh);
	return skb->len;

nlmsg_failure:
nla_put_failure:
	nlmsg_cancel(skb, nlh);
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct)
{
	struct nlattr *nest_count;
	const struct nf_conn_tstamp *tstamp;

	tstamp = nf_conn_tstamp_find(ct);
	if (!tstamp)
		return 0;

	nest_count = nla_nest_start(skb, CTA_TIMESTAMP);
	if (!nest_count)
		goto nla_put_failure;

	if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start),
			 CTA_TIMESTAMP_PAD) ||
	    (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP,
					       cpu_to_be64(tstamp->stop),
					       CTA_TIMESTAMP_PAD)))
		goto nla_put_failure;
	nla_nest_end(skb, nest_count);

	return 0;

nla_put_failure:
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_setup_nat(struct nf_conn *ct, const struct nlattr * const cda[])
{
#if IS_ENABLED(CONFIG_NF_NAT)
	int ret;

	if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC])
		return 0;

	ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_DST,
					cda[CTA_NAT_DST]);
	if (ret < 0)
		return ret;

	return ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_SRC,
					 cda[CTA_NAT_SRC]);
#else
	if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC])
		return 0;
	return -EOPNOTSUPP;
#endif
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_del_conntrack(struct net *net, struct sock *ctnl,
				   struct sk_buff *skb,
				   const struct nlmsghdr *nlh,
				   const struct nlattr * const cda[],
				   struct netlink_ext_ack *extack)
{
	struct nf_conntrack_tuple_hash *h;
	struct nf_conntrack_tuple tuple;
	struct nf_conn *ct;
	struct nfgenmsg *nfmsg = nlmsg_data(nlh);
	struct nf_conntrack_zone zone;
	int err;

	err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
	if (err < 0)
		return err;

	if (cda[CTA_TUPLE_ORIG])
		err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG,
					    nfmsg->nfgen_family, &zone);
	else if (cda[CTA_TUPLE_REPLY])
		err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY,
					    nfmsg->nfgen_family, &zone);
	else {
		u_int8_t u3 = nfmsg->version ? nfmsg->nfgen_family : AF_UNSPEC;

		return ctnetlink_flush_conntrack(net, cda,
						 NETLINK_CB(skb).portid,
						 nlmsg_report(nlh), u3);
	}

	if (err < 0)
		return err;

	h = nf_conntrack_find_get(net, &zone, &tuple);
	if (!h)
		return -ENOENT;

	ct = nf_ct_tuplehash_to_ctrack(h);

	if (test_bit(IPS_OFFLOAD_BIT, &ct->status)) {
		nf_ct_put(ct);
		return -EBUSY;
	}

	if (cda[CTA_ID]) {
		__be32 id = nla_get_be32(cda[CTA_ID]);

		if (id != (__force __be32)nf_ct_get_id(ct)) {
			nf_ct_put(ct);
			return -ENOENT;
		}
	}

	nf_ct_delete(ct, NETLINK_CB(skb).portid, nlmsg_report(nlh));
	nf_ct_put(ct);

	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_change_seq_adj(struct nf_conn *ct,
			 const struct nlattr * const cda[])
{
	struct nf_conn_seqadj *seqadj = nfct_seqadj(ct);
	int ret = 0;

	if (!seqadj)
		return 0;

	spin_lock_bh(&ct->lock);
	if (cda[CTA_SEQ_ADJ_ORIG]) {
		ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_ORIGINAL],
				     cda[CTA_SEQ_ADJ_ORIG]);
		if (ret < 0)
			goto err;

		set_bit(IPS_SEQ_ADJUST_BIT, &ct->status);
	}

	if (cda[CTA_SEQ_ADJ_REPLY]) {
		ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_REPLY],
				     cda[CTA_SEQ_ADJ_REPLY]);
		if (ret < 0)
			goto err;

		set_bit(IPS_SEQ_ADJUST_BIT, &ct->status);
	}

	spin_unlock_bh(&ct->lock);
	return 0;
err:
	spin_unlock_bh(&ct->lock);
	return ret;
}

Project: linux
File: nf_conntrack_netlink.c

__ctnetlink_change_status(struct nf_conn *ct, unsigned long on,
			  unsigned long off)
{
	unsigned int bit;

	/* Ignore these unchangable bits */
	on &= ~IPS_UNCHANGEABLE_MASK;
	off &= ~IPS_UNCHANGEABLE_MASK;

	for (bit = 0; bit < __IPS_MAX_BIT; bit++) {
		if (on & (1 << bit))
			set_bit(bit, &ct->status);
		else if (off & (1 << bit))
			clear_bit(bit, &ct->status);
	}
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_change_timeout(struct nf_conn *ct,
				    const struct nlattr * const cda[])
{
	u64 timeout = (u64)ntohl(nla_get_be32(cda[CTA_TIMEOUT])) * HZ;

	if (timeout > INT_MAX)
		timeout = INT_MAX;
	ct->timeout = nfct_time_stamp + (u32)timeout;

	if (test_bit(IPS_DYING_BIT, &ct->status))
		return -ETIME;

	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_exp_dump_expect(struct sk_buff *skb,
			  const struct nf_conntrack_expect *exp)
{
	struct nf_conn *master = exp->master;
	long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ;
	struct nf_conn_help *help;
#if IS_ENABLED(CONFIG_NF_NAT)
	struct nlattr *nest_parms;
	struct nf_conntrack_tuple nat_tuple = {};
#endif
	struct nf_ct_helper_expectfn *expfn;

	if (timeout < 0)
		timeout = 0;

	if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0)
		goto nla_put_failure;
	if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0)
		goto nla_put_failure;
	if (ctnetlink_exp_dump_tuple(skb,
				 &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
				 CTA_EXPECT_MASTER) < 0)
		goto nla_put_failure;

#if IS_ENABLED(CONFIG_NF_NAT)
	if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) ||
	    exp->saved_proto.all) {
		nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT);
		if (!nest_parms)
			goto nla_put_failure;

		if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir)))
			goto nla_put_failure;

		nat_tuple.src.l3num = nf_ct_l3num(master);
		nat_tuple.src.u3 = exp->saved_addr;
		nat_tuple.dst.protonum = nf_ct_protonum(master);
		nat_tuple.src.u = exp->saved_proto;

		if (ctnetlink_exp_dump_tuple(skb, &nat_tuple,
						CTA_EXPECT_NAT_TUPLE) < 0)
	                goto nla_put_failure;
	        nla_nest_end(skb, nest_parms);
	}
#endif
	if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) ||
	    nla_put_be32(skb, CTA_EXPECT_ID, nf_expect_get_id(exp)) ||
	    nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) ||
	    nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class)))
		goto nla_put_failure;
	help = nfct_help(master);
	if (help) {
		struct nf_conntrack_helper *helper;

		helper = rcu_dereference(help->helper);
		if (helper &&
		    nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name))
			goto nla_put_failure;
	}
	expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn);
	if (expfn != NULL &&
	    nla_put_string(skb, CTA_EXPECT_FN, expfn->name))
		goto nla_put_failure;

	return 0;

nla_put_failure:
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_stat_ct_cpu(struct net *net, struct sock *ctnl,
				 struct sk_buff *skb,
				 const struct nlmsghdr *nlh,
				 const struct nlattr * const cda[],
				 struct netlink_ext_ack *extack)
{
	if (nlh->nlmsg_flags & NLM_F_DUMP) {
		struct netlink_dump_control c = {
			.dump = ctnetlink_ct_stat_cpu_dump,
		};
		return netlink_dump_start(ctnl, skb, nlh, &c);
	}

	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_alloc_expect(const struct nlattr * const cda[], struct nf_conn *ct,
		       struct nf_conntrack_helper *helper,
		       struct nf_conntrack_tuple *tuple,
		       struct nf_conntrack_tuple *mask)
{
	u_int32_t class = 0;
	struct nf_conntrack_expect *exp;
	struct nf_conn_help *help;
	int err;

	help = nfct_help(ct);
	if (!help)
		return ERR_PTR(-EOPNOTSUPP);

	if (cda[CTA_EXPECT_CLASS] && helper) {
		class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS]));
		if (class > helper->expect_class_max)
			return ERR_PTR(-EINVAL);
	}
	exp = nf_ct_expect_alloc(ct);
	if (!exp)
		return ERR_PTR(-ENOMEM);

	if (cda[CTA_EXPECT_FLAGS]) {
		exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
		exp->flags &= ~NF_CT_EXPECT_USERSPACE;
	} else {
		exp->flags = 0;
	}
	if (cda[CTA_EXPECT_FN]) {
		const char *name = nla_data(cda[CTA_EXPECT_FN]);
		struct nf_ct_helper_expectfn *expfn;

		expfn = nf_ct_helper_expectfn_find_by_name(name);
		if (expfn == NULL) {
			err = -EINVAL;
			goto err_out;
		}
		exp->expectfn = expfn->expectfn;
	} else
		exp->expectfn = NULL;

	exp->class = class;
	exp->master = ct;
	exp->helper = helper;
	exp->tuple = *tuple;
	exp->mask.src.u3 = mask->src.u3;
	exp->mask.src.u.all = mask->src.u.all;

	if (cda[CTA_EXPECT_NAT]) {
		err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT],
						 exp, nf_ct_l3num(ct));
		if (err < 0)
			goto err_out;
	}
	return exp;
err_out:
	nf_ct_expect_put(exp);
	return ERR_PTR(err);
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct)
{
	if (nla_put_be32(skb, CTA_MARK, htonl(ct->mark)))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_ct_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb)
{
	int cpu;
	struct net *net = sock_net(skb->sk);

	if (cb->args[0] == nr_cpu_ids)
		return 0;

	for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
		const struct ip_conntrack_stat *st;

		if (!cpu_possible(cpu))
			continue;

		st = per_cpu_ptr(net->ct.stat, cpu);
		if (ctnetlink_ct_stat_cpu_fill_info(skb,
						    NETLINK_CB(cb->skb).portid,
						    cb->nlh->nlmsg_seq,
						    cpu, st) < 0)
				break;
	}
	cb->args[0] = cpu;

	return skb->len;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_exp_done(struct netlink_callback *cb)
{
	if (cb->args[1])
		nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]);
	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_exp_stat_fill_info(struct sk_buff *skb, u32 portid, u32 seq, int cpu,
			     const struct ip_conntrack_stat *st)
{
	struct nlmsghdr *nlh;
	struct nfgenmsg *nfmsg;
	unsigned int flags = portid ? NLM_F_MULTI : 0, event;

	event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK,
			      IPCTNL_MSG_EXP_GET_STATS_CPU);
	nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
	if (nlh == NULL)
		goto nlmsg_failure;

	nfmsg = nlmsg_data(nlh);
	nfmsg->nfgen_family = AF_UNSPEC;
	nfmsg->version      = NFNETLINK_V0;
	nfmsg->res_id	    = htons(cpu);

	if (nla_put_be32(skb, CTA_STATS_EXP_NEW, htonl(st->expect_new)) ||
	    nla_put_be32(skb, CTA_STATS_EXP_CREATE, htonl(st->expect_create)) ||
	    nla_put_be32(skb, CTA_STATS_EXP_DELETE, htonl(st->expect_delete)))
		goto nla_put_failure;

	nlmsg_end(skb, nlh);
	return skb->len;

nla_put_failure:
nlmsg_failure:
	nlmsg_cancel(skb, nlh);
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_stat_ct(struct net *net, struct sock *ctnl,
			     struct sk_buff *skb, const struct nlmsghdr *nlh,
			     const struct nlattr * const cda[],
			     struct netlink_ext_ack *extack)
{
	struct sk_buff *skb2;
	int err;

	skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	if (skb2 == NULL)
		return -ENOMEM;

	err = ctnetlink_stat_ct_fill_info(skb2, NETLINK_CB(skb).portid,
					  nlh->nlmsg_seq,
					  NFNL_MSG_TYPE(nlh->nlmsg_type),
					  sock_net(skb->sk));
	if (err <= 0)
		goto free;

	err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
	if (err < 0)
		goto out;

	return 0;

free:
	kfree_skb(skb2);
out:
	/* this avoids a loop in nfnetlink. */
	return err == -EAGAIN ? -ENOBUFS : err;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_change_helper(struct nf_conn *ct,
				   const struct nlattr * const cda[])
{
	struct nf_conntrack_helper *helper;
	struct nf_conn_help *help = nfct_help(ct);
	char *helpname = NULL;
	struct nlattr *helpinfo = NULL;
	int err;

	err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo);
	if (err < 0)
		return err;

	/* don't change helper of sibling connections */
	if (ct->master) {
		/* If we try to change the helper to the same thing twice,
		 * treat the second attempt as a no-op instead of returning
		 * an error.
		 */
		err = -EBUSY;
		if (help) {
			rcu_read_lock();
			helper = rcu_dereference(help->helper);
			if (helper && !strcmp(helper->name, helpname))
				err = 0;
			rcu_read_unlock();
		}

		return err;
	}

	if (!strcmp(helpname, "")) {
		if (help && help->helper) {
			/* we had a helper before ... */
			nf_ct_remove_expectations(ct);
			RCU_INIT_POINTER(help->helper, NULL);
		}

		return 0;
	}

	rcu_read_lock();
	helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),
					    nf_ct_protonum(ct));
	if (helper == NULL) {
		rcu_read_unlock();
		return -EOPNOTSUPP;
	}

	if (help) {
		if (help->helper == helper) {
			/* update private helper data if allowed. */
			if (helper->from_nlattr)
				helper->from_nlattr(helpinfo, ct);
			err = 0;
		} else
			err = -EBUSY;
	} else {
		/* we cannot set a helper for an existing conntrack */
		err = -EOPNOTSUPP;
	}

	rcu_read_unlock();
	return err;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct)
{
	if (nla_put_be32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_dump_ct_seq_adj(struct sk_buff *skb, struct nf_conn *ct)
{
	struct nf_conn_seqadj *seqadj = nfct_seqadj(ct);
	struct nf_ct_seqadj *seq;

	if (!(ct->status & IPS_SEQ_ADJUST) || !seqadj)
		return 0;

	spin_lock_bh(&ct->lock);
	seq = &seqadj->seq[IP_CT_DIR_ORIGINAL];
	if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_ORIG) == -1)
		goto err;

	seq = &seqadj->seq[IP_CT_DIR_REPLY];
	if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_REPLY) == -1)
		goto err;

	spin_unlock_bh(&ct->lock);
	return 0;
err:
	spin_unlock_bh(&ct->lock);
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct)
{
	const struct nf_conntrack_l4proto *l4proto;
	struct nlattr *nest_proto;
	int ret;

	l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
	if (!l4proto->to_nlattr)
		return 0;

	nest_proto = nla_nest_start(skb, CTA_PROTOINFO);
	if (!nest_proto)
		goto nla_put_failure;

	ret = l4proto->to_nlattr(skb, nest_proto, ct);

	nla_nest_end(skb, nest_proto);

	return ret;

nla_put_failure:
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_dump_labels(struct sk_buff *skb, const struct nf_conn *ct)
{
	struct nf_conn_labels *labels = nf_ct_labels_find(ct);
	unsigned int i;

	if (!labels)
		return 0;

	i = 0;
	do {
		if (labels->bits[i] != 0)
			return nla_put(skb, CTA_LABELS, sizeof(labels->bits),
				       labels->bits);
		i++;
	} while (i < ARRAY_SIZE(labels->bits));

	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_parse_help(const struct nlattr *attr, char **helper_name,
				struct nlattr **helpinfo)
{
	int err;
	struct nlattr *tb[CTA_HELP_MAX+1];

	err = nla_parse_nested_deprecated(tb, CTA_HELP_MAX, attr,
					  help_nla_policy, NULL);
	if (err < 0)
		return err;

	if (!tb[CTA_HELP_NAME])
		return -EINVAL;

	*helper_name = nla_data(tb[CTA_HELP_NAME]);

	if (tb[CTA_HELP_INFO])
		*helpinfo = tb[CTA_HELP_INFO];

	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_dump_tuples_proto(struct sk_buff *skb,
				const struct nf_conntrack_tuple *tuple,
				const struct nf_conntrack_l4proto *l4proto)
{
	int ret = 0;
	struct nlattr *nest_parms;

	nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO);
	if (!nest_parms)
		goto nla_put_failure;
	if (nla_put_u8(skb, CTA_PROTO_NUM, tuple->dst.protonum))
		goto nla_put_failure;

	if (likely(l4proto->tuple_to_nlattr))
		ret = l4proto->tuple_to_nlattr(skb, tuple);

	nla_nest_end(skb, nest_parms);

	return ret;

nla_put_failure:
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
{
	const struct nf_conntrack_zone *zone;
	struct net *net;
	struct nlmsghdr *nlh;
	struct nfgenmsg *nfmsg;
	struct nlattr *nest_parms;
	struct nf_conn *ct = item->ct;
	struct sk_buff *skb;
	unsigned int type;
	unsigned int flags = 0, group;
	int err;

	if (events & (1 << IPCT_DESTROY)) {
		type = IPCTNL_MSG_CT_DELETE;
		group = NFNLGRP_CONNTRACK_DESTROY;
	} else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) {
		type = IPCTNL_MSG_CT_NEW;
		flags = NLM_F_CREATE|NLM_F_EXCL;
		group = NFNLGRP_CONNTRACK_NEW;
	} else if (events) {
		type = IPCTNL_MSG_CT_NEW;
		group = NFNLGRP_CONNTRACK_UPDATE;
	} else
		return 0;

	net = nf_ct_net(ct);
	if (!item->report && !nfnetlink_has_listeners(net, group))
		return 0;

	skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC);
	if (skb == NULL)
		goto errout;

	type = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, type);
	nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags);
	if (nlh == NULL)
		goto nlmsg_failure;

	nfmsg = nlmsg_data(nlh);
	nfmsg->nfgen_family = nf_ct_l3num(ct);
	nfmsg->version	= NFNETLINK_V0;
	nfmsg->res_id	= 0;

	zone = nf_ct_zone(ct);

	nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG);
	if (!nest_parms)
		goto nla_put_failure;
	if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
		goto nla_put_failure;
	if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
				   NF_CT_ZONE_DIR_ORIG) < 0)
		goto nla_put_failure;
	nla_nest_end(skb, nest_parms);

	nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY);
	if (!nest_parms)
		goto nla_put_failure;
	if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0)
		goto nla_put_failure;
	if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone,
				   NF_CT_ZONE_DIR_REPL) < 0)
		goto nla_put_failure;
	nla_nest_end(skb, nest_parms);

	if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone,
				   NF_CT_DEFAULT_ZONE_DIR) < 0)
		goto nla_put_failure;

	if (ctnetlink_dump_id(skb, ct) < 0)
		goto nla_put_failure;

	if (ctnetlink_dump_status(skb, ct) < 0)
		goto nla_put_failure;

	if (events & (1 << IPCT_DESTROY)) {
		if (ctnetlink_dump_acct(skb, ct, type) < 0 ||
		    ctnetlink_dump_timestamp(skb, ct) < 0)
			goto nla_put_failure;
	} else {
		if (ctnetlink_dump_timeout(skb, ct) < 0)
			goto nla_put_failure;

		if (events & (1 << IPCT_PROTOINFO)
		    && ctnetlink_dump_protoinfo(skb, ct) < 0)
			goto nla_put_failure;

		if ((events & (1 << IPCT_HELPER) || nfct_help(ct))
		    && ctnetlink_dump_helpinfo(skb, ct) < 0)
			goto nla_put_failure;

#ifdef CONFIG_NF_CONNTRACK_SECMARK
		if ((events & (1 << IPCT_SECMARK) || ct->secmark)
		    && ctnetlink_dump_secctx(skb, ct) < 0)
			goto nla_put_failure;
#endif
		if (events & (1 << IPCT_LABEL) &&
		     ctnetlink_dump_labels(skb, ct) < 0)
			goto nla_put_failure;

		if (events & (1 << IPCT_RELATED) &&
		    ctnetlink_dump_master(skb, ct) < 0)
			goto nla_put_failure;

		if (events & (1 << IPCT_SEQADJ) &&
		    ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
			goto nla_put_failure;

		if (events & (1 << IPCT_SYNPROXY) &&
		    ctnetlink_dump_ct_synproxy(skb, ct) < 0)
			goto nla_put_failure;
	}

#ifdef CONFIG_NF_CONNTRACK_MARK
	if ((events & (1 << IPCT_MARK) || ct->mark)
	    && ctnetlink_dump_mark(skb, ct) < 0)
		goto nla_put_failure;
#endif
	nlmsg_end(skb, nlh);
	err = nfnetlink_send(skb, net, item->portid, group, item->report,
			     GFP_ATOMIC);
	if (err == -ENOBUFS || err == -EAGAIN)
		return -ENOBUFS;

	return 0;

nla_put_failure:
	nlmsg_cancel(skb, nlh);
nlmsg_failure:
	kfree_skb(skb);
errout:
	if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0)
		return -ENOBUFS;

	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_glue_build_size(const struct nf_conn *ct)
{
	return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
	       + 3 * nla_total_size(0) /* CTA_TUPLE_IP */
	       + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
	       + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */
	       + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */
	       + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */
	       + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */
	       + nla_total_size(0) /* CTA_PROTOINFO */
	       + nla_total_size(0) /* CTA_HELP */
	       + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
	       + ctnetlink_secctx_size(ct)
#if IS_ENABLED(CONFIG_NF_NAT)
	       + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
	       + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
#endif
#ifdef CONFIG_NF_CONNTRACK_MARK
	       + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */
#endif
#ifdef CONFIG_NF_CONNTRACK_ZONES
	       + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */
#endif
	       + ctnetlink_proto_size(ct)
	       ;
}

Project: linux
File: nf_conntrack_netlink.c

static void ctnetlink_glue_seqadj(struct sk_buff *skb, struct nf_conn *ct,
				  enum ip_conntrack_info ctinfo, int diff)
{
	if (!(ct->status & IPS_NAT_MASK))
		return;

	nf_ct_tcp_seqadj_set(skb, ct, ctinfo, diff);
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct)
{
	struct nlattr *nest_parms;

	if (!(ct->status & IPS_EXPECTED))
		return 0;

	nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER);
	if (!nest_parms)
		goto nla_put_failure;
	if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0)
		goto nla_put_failure;
	nla_nest_end(skb, nest_parms);

	return 0;

nla_put_failure:
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

static bool expect_iter_name(struct nf_conntrack_expect *exp, void *data)
{
	const struct nf_conn_help *m_help;
	const char *name = data;

	m_help = nfct_help(exp->master);

	return strcmp(m_help->helper->name, name) == 0;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item)
{
	struct nf_conntrack_expect *exp = item->exp;
	struct net *net = nf_ct_exp_net(exp);
	struct nlmsghdr *nlh;
	struct nfgenmsg *nfmsg;
	struct sk_buff *skb;
	unsigned int type, group;
	int flags = 0;

	if (events & (1 << IPEXP_DESTROY)) {
		type = IPCTNL_MSG_EXP_DELETE;
		group = NFNLGRP_CONNTRACK_EXP_DESTROY;
	} else if (events & (1 << IPEXP_NEW)) {
		type = IPCTNL_MSG_EXP_NEW;
		flags = NLM_F_CREATE|NLM_F_EXCL;
		group = NFNLGRP_CONNTRACK_EXP_NEW;
	} else
		return 0;

	if (!item->report && !nfnetlink_has_listeners(net, group))
		return 0;

	skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
	if (skb == NULL)
		goto errout;

	type = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK_EXP, type);
	nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags);
	if (nlh == NULL)
		goto nlmsg_failure;

	nfmsg = nlmsg_data(nlh);
	nfmsg->nfgen_family = exp->tuple.src.l3num;
	nfmsg->version	    = NFNETLINK_V0;
	nfmsg->res_id	    = 0;

	if (ctnetlink_exp_dump_expect(skb, exp) < 0)
		goto nla_put_failure;

	nlmsg_end(skb, nlh);
	nfnetlink_send(skb, net, item->portid, group, item->report, GFP_ATOMIC);
	return 0;

nla_put_failure:
	nlmsg_cancel(skb, nlh);
nlmsg_failure:
	kfree_skb(skb);
errout:
	nfnetlink_set_err(net, 0, 0, -ENOBUFS);
	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

static void ctnetlink_net_exit(struct net *net)
{
#ifdef CONFIG_NF_CONNTRACK_EVENTS
	nf_ct_expect_unregister_notifier(net, &ctnl_notifier_exp);
	nf_conntrack_unregister_notifier(net, &ctnl_notifier);
#endif
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_get_expect(struct net *net, struct sock *ctnl,
				struct sk_buff *skb, const struct nlmsghdr *nlh,
				const struct nlattr * const cda[],
				struct netlink_ext_ack *extack)
{
	struct nf_conntrack_tuple tuple;
	struct nf_conntrack_expect *exp;
	struct sk_buff *skb2;
	struct nfgenmsg *nfmsg = nlmsg_data(nlh);
	u_int8_t u3 = nfmsg->nfgen_family;
	struct nf_conntrack_zone zone;
	int err;

	if (nlh->nlmsg_flags & NLM_F_DUMP) {
		if (cda[CTA_EXPECT_MASTER])
			return ctnetlink_dump_exp_ct(net, ctnl, skb, nlh, cda,
						     extack);
		else {
			struct netlink_dump_control c = {
				.dump = ctnetlink_exp_dump_table,
				.done = ctnetlink_exp_done,
			};
			return netlink_dump_start(ctnl, skb, nlh, &c);
		}
	}

	err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
	if (err < 0)
		return err;

	if (cda[CTA_EXPECT_TUPLE])
		err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE,
					    u3, NULL);
	else if (cda[CTA_EXPECT_MASTER])
		err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER,
					    u3, NULL);
	else
		return -EINVAL;

	if (err < 0)
		return err;

	exp = nf_ct_expect_find_get(net, &zone, &tuple);
	if (!exp)
		return -ENOENT;

	if (cda[CTA_EXPECT_ID]) {
		__be32 id = nla_get_be32(cda[CTA_EXPECT_ID]);

		if (id != nf_expect_get_id(exp)) {
			nf_ct_expect_put(exp);
			return -ENOENT;
		}
	}

	err = -ENOMEM;
	skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	if (skb2 == NULL) {
		nf_ct_expect_put(exp);
		goto out;
	}

	rcu_read_lock();
	err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).portid,
				      nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp);
	rcu_read_unlock();
	nf_ct_expect_put(exp);
	if (err <= 0)
		goto free;

	err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT);
	if (err < 0)
		goto out;

	return 0;

free:
	kfree_skb(skb2);
out:
	/* this avoids a loop in nfnetlink. */
	return err == -EAGAIN ? -ENOBUFS : err;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_glue_parse(const struct nlattr *attr, struct nf_conn *ct)
{
	struct nlattr *cda[CTA_MAX+1];
	int ret;

	ret = nla_parse_nested_deprecated(cda, CTA_MAX, attr, ct_nla_policy,
					  NULL);
	if (ret < 0)
		return ret;

	return ctnetlink_glue_parse_ct((const struct nlattr **)cda, ct);
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_stat_ct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
			    struct net *net)
{
	struct nlmsghdr *nlh;
	struct nfgenmsg *nfmsg;
	unsigned int flags = portid ? NLM_F_MULTI : 0, event;
	unsigned int nr_conntracks = atomic_read(&net->ct.count);

	event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, IPCTNL_MSG_CT_GET_STATS);
	nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
	if (nlh == NULL)
		goto nlmsg_failure;

	nfmsg = nlmsg_data(nlh);
	nfmsg->nfgen_family = AF_UNSPEC;
	nfmsg->version      = NFNETLINK_V0;
	nfmsg->res_id	    = 0;

	if (nla_put_be32(skb, CTA_STATS_GLOBAL_ENTRIES, htonl(nr_conntracks)))
		goto nla_put_failure;

	if (nla_put_be32(skb, CTA_STATS_GLOBAL_MAX_ENTRIES, htonl(nf_conntrack_max)))
		goto nla_put_failure;

	nlmsg_end(skb, nlh);
	return skb->len;

nla_put_failure:
nlmsg_failure:
	nlmsg_cancel(skb, nlh);
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_get_ct_unconfirmed(struct net *net, struct sock *ctnl,
					struct sk_buff *skb,
					const struct nlmsghdr *nlh,
					const struct nlattr * const cda[],
					struct netlink_ext_ack *extack)
{
	if (nlh->nlmsg_flags & NLM_F_DUMP) {
		struct netlink_dump_control c = {
			.dump = ctnetlink_dump_unconfirmed,
			.done = ctnetlink_done_list,
		};
		return netlink_dump_start(ctnl, skb, nlh, &c);
	}

	return -EOPNOTSUPP;
}

Project: linux
File: nf_conntrack_netlink.c

static int ipv4_nlattr_to_tuple(struct nlattr *tb[],
				struct nf_conntrack_tuple *t,
				u_int32_t flags)
{
	if (flags & CTA_FILTER_FLAG(CTA_IP_SRC)) {
		if (!tb[CTA_IP_V4_SRC])
			return -EINVAL;

		t->src.u3.ip = nla_get_in_addr(tb[CTA_IP_V4_SRC]);
	}

	if (flags & CTA_FILTER_FLAG(CTA_IP_DST)) {
		if (!tb[CTA_IP_V4_DST])
			return -EINVAL;

		t->dst.u3.ip = nla_get_in_addr(tb[CTA_IP_V4_DST]);
	}

	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_flush_conntrack(struct net *net,
				     const struct nlattr * const cda[],
				     u32 portid, int report, u8 family)
{
	struct ctnetlink_filter *filter = NULL;

	if (ctnetlink_needs_filter(family, cda)) {
		if (cda[CTA_FILTER])
			return -EOPNOTSUPP;

		filter = ctnetlink_alloc_filter(cda, family);
		if (IS_ERR(filter))
			return PTR_ERR(filter);
	}

	nf_ct_iterate_cleanup_net(net, ctnetlink_flush_iterate, filter,
				  portid, report);
	kfree(filter);

	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

dump_counters(struct sk_buff *skb, struct nf_conn_acct *acct,
	      enum ip_conntrack_dir dir, int type)
{
	enum ctattr_type attr = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG;
	struct nf_conn_counter *counter = acct->counter;
	struct nlattr *nest_count;
	u64 pkts, bytes;

	if (type == IPCTNL_MSG_CT_GET_CTRZERO) {
		pkts = atomic64_xchg(&counter[dir].packets, 0);
		bytes = atomic64_xchg(&counter[dir].bytes, 0);
	} else {
		pkts = atomic64_read(&counter[dir].packets);
		bytes = atomic64_read(&counter[dir].bytes);
	}

	nest_count = nla_nest_start(skb, attr);
	if (!nest_count)
		goto nla_put_failure;

	if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts),
			 CTA_COUNTERS_PAD) ||
	    nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes),
			 CTA_COUNTERS_PAD))
		goto nla_put_failure;

	nla_nest_end(skb, nest_count);

	return 0;

nla_put_failure:
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_dump_dying(struct sk_buff *skb, struct netlink_callback *cb)
{
	return ctnetlink_dump_list(skb, cb, true);
}

Project: linux
File: nf_conntrack_netlink.c

static void ctnetlink_change_mark(struct nf_conn *ct,
				    const struct nlattr * const cda[])
{
	u32 mark, newmark, mask = 0;

	if (cda[CTA_MARK_MASK])
		mask = ~ntohl(nla_get_be32(cda[CTA_MARK_MASK]));

	mark = ntohl(nla_get_be32(cda[CTA_MARK]));
	newmark = (ct->mark & mask) ^ mark;
	if (newmark != ct->mark)
		ct->mark = newmark;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_filter_match(struct nf_conn *ct, void *data)
{
	struct ctnetlink_filter *filter = data;
	struct nf_conntrack_tuple *tuple;

	if (filter == NULL)
		goto out;

	/* Match entries of a given L3 protocol number.
	 * If it is not specified, ie. l3proto == 0,
	 * then match everything.
	 */
	if (filter->family && nf_ct_l3num(ct) != filter->family)
		goto ignore_entry;

	if (filter->orig_flags) {
		tuple = nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL);
		if (!ctnetlink_filter_match_tuple(&filter->orig, tuple,
						  filter->orig_flags,
						  filter->family))
			goto ignore_entry;
	}

	if (filter->reply_flags) {
		tuple = nf_ct_tuple(ct, IP_CT_DIR_REPLY);
		if (!ctnetlink_filter_match_tuple(&filter->reply, tuple,
						  filter->reply_flags,
						  filter->family))
			goto ignore_entry;
	}

#ifdef CONFIG_NF_CONNTRACK_MARK
	if ((filter->cta_flags & CTA_FILTER_FLAG(CTA_MARK_MASK)) &&
	    (ct->mark & filter->mark.mask) != filter->mark.val)
		goto ignore_entry;
	else if ((filter->cta_flags & CTA_FILTER_FLAG(CTA_MARK)) &&
		 ct->mark != filter->mark.val)
		goto ignore_entry;
#endif

out:
	return 1;

ignore_entry:
	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_parse_zone(const struct nlattr *attr,
		     struct nf_conntrack_zone *zone)
{
	nf_ct_zone_init(zone, NF_CT_DEFAULT_ZONE_ID,
			NF_CT_DEFAULT_ZONE_DIR, 0);
#ifdef CONFIG_NF_CONNTRACK_ZONES
	if (attr)
		zone->id = ntohs(nla_get_be16(attr));
#else
	if (attr)
		return -EOPNOTSUPP;
#endif
	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_dump_acct(struct sk_buff *skb, const struct nf_conn *ct, int type)
{
	struct nf_conn_acct *acct = nf_conn_acct_find(ct);

	if (!acct)
		return 0;

	if (dump_counters(skb, acct, IP_CT_DIR_ORIGINAL, type) < 0)
		return -1;
	if (dump_counters(skb, acct, IP_CT_DIR_REPLY, type) < 0)
		return -1;

	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

static int ipv4_tuple_to_nlattr(struct sk_buff *skb,
				const struct nf_conntrack_tuple *tuple)
{
	if (nla_put_in_addr(skb, CTA_IP_V4_SRC, tuple->src.u3.ip) ||
	    nla_put_in_addr(skb, CTA_IP_V4_DST, tuple->dst.u3.ip))
		return -EMSGSIZE;
	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_dump_zone_id(struct sk_buff *skb, int attrtype,
				  const struct nf_conntrack_zone *zone, int dir)
{
	if (zone->id == NF_CT_DEFAULT_ZONE_ID || zone->dir != dir)
		return 0;
	if (nla_put_be16(skb, attrtype, htons(zone->id)))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

static inline int ctnetlink_label_size(const struct nf_conn *ct)
{
	struct nf_conn_labels *labels = nf_ct_labels_find(ct);

	if (!labels)
		return 0;
	return nla_total_size(sizeof(labels->bits));
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_ct_stat_cpu_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
				__u16 cpu, const struct ip_conntrack_stat *st)
{
	struct nlmsghdr *nlh;
	struct nfgenmsg *nfmsg;
	unsigned int flags = portid ? NLM_F_MULTI : 0, event;

	event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK,
			      IPCTNL_MSG_CT_GET_STATS_CPU);
	nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
	if (nlh == NULL)
		goto nlmsg_failure;

	nfmsg = nlmsg_data(nlh);
	nfmsg->nfgen_family = AF_UNSPEC;
	nfmsg->version      = NFNETLINK_V0;
	nfmsg->res_id	    = htons(cpu);

	if (nla_put_be32(skb, CTA_STATS_FOUND, htonl(st->found)) ||
	    nla_put_be32(skb, CTA_STATS_INVALID, htonl(st->invalid)) ||
	    nla_put_be32(skb, CTA_STATS_IGNORE, htonl(st->ignore)) ||
	    nla_put_be32(skb, CTA_STATS_INSERT, htonl(st->insert)) ||
	    nla_put_be32(skb, CTA_STATS_INSERT_FAILED,
				htonl(st->insert_failed)) ||
	    nla_put_be32(skb, CTA_STATS_DROP, htonl(st->drop)) ||
	    nla_put_be32(skb, CTA_STATS_EARLY_DROP, htonl(st->early_drop)) ||
	    nla_put_be32(skb, CTA_STATS_ERROR, htonl(st->error)) ||
	    nla_put_be32(skb, CTA_STATS_SEARCH_RESTART,
				htonl(st->search_restart)))
		goto nla_put_failure;

	nlmsg_end(skb, nlh);
	return skb->len;

nla_put_failure:
nlmsg_failure:
	nlmsg_cancel(skb, nlh);
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_dump_exp_ct(struct net *net, struct sock *ctnl,
				 struct sk_buff *skb,
				 const struct nlmsghdr *nlh,
				 const struct nlattr * const cda[],
				 struct netlink_ext_ack *extack)
{
	int err;
	struct nfgenmsg *nfmsg = nlmsg_data(nlh);
	u_int8_t u3 = nfmsg->nfgen_family;
	struct nf_conntrack_tuple tuple;
	struct nf_conntrack_tuple_hash *h;
	struct nf_conn *ct;
	struct nf_conntrack_zone zone;
	struct netlink_dump_control c = {
		.dump = ctnetlink_exp_ct_dump_table,
		.done = ctnetlink_exp_done,
	};

	err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER,
				    u3, NULL);
	if (err < 0)
		return err;

	err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);
	if (err < 0)
		return err;

	h = nf_conntrack_find_get(net, &zone, &tuple);
	if (!h)
		return -ENOENT;

	ct = nf_ct_tuplehash_to_ctrack(h);
	/* No expectation linked to this connection tracking. */
	if (!nfct_help(ct)) {
		nf_ct_put(ct);
		return 0;
	}

	c.data = ct;

	err = netlink_dump_start(ctnl, skb, nlh, &c);
	nf_ct_put(ct);

	return err;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_glue_exp_parse(const struct nlattr * const *cda,
				    const struct nf_conn *ct,
				    struct nf_conntrack_tuple *tuple,
				    struct nf_conntrack_tuple *mask)
{
	int err;

	err = ctnetlink_parse_tuple(cda, tuple, CTA_EXPECT_TUPLE,
				    nf_ct_l3num(ct), NULL);
	if (err < 0)
		return err;

	return ctnetlink_parse_tuple(cda, mask, CTA_EXPECT_MASK,
				     nf_ct_l3num(ct), NULL);
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_parse_expect_nat(const struct nlattr *attr,
			   struct nf_conntrack_expect *exp,
			   u_int8_t u3)
{
#if IS_ENABLED(CONFIG_NF_NAT)
	struct nlattr *tb[CTA_EXPECT_NAT_MAX+1];
	struct nf_conntrack_tuple nat_tuple = {};
	int err;

	err = nla_parse_nested_deprecated(tb, CTA_EXPECT_NAT_MAX, attr,
					  exp_nat_nla_policy, NULL);
	if (err < 0)
		return err;

	if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE])
		return -EINVAL;

	err = ctnetlink_parse_tuple((const struct nlattr * const *)tb,
				    &nat_tuple, CTA_EXPECT_NAT_TUPLE,
				    u3, NULL);
	if (err < 0)
		return err;

	exp->saved_addr = nat_tuple.src.u3;
	exp->saved_proto = nat_tuple.src.u;
	exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR]));

	return 0;
#else
	return -EOPNOTSUPP;
#endif
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct)
{
	__be32 id = (__force __be32)nf_ct_get_id(ct);

	if (nla_put_be32(skb, CTA_ID, id))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -1;
}

Project: linux
File: nf_conntrack_netlink.c

static int ipv6_tuple_to_nlattr(struct sk_buff *skb,
				const struct nf_conntrack_tuple *tuple)
{
	if (nla_put_in6_addr(skb, CTA_IP_V6_SRC, &tuple->src.u3.in6) ||
	    nla_put_in6_addr(skb, CTA_IP_V6_DST, &tuple->dst.u3.in6))
		return -EMSGSIZE;
	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

static inline int ctnetlink_secctx_size(const struct nf_conn *ct)
{
#ifdef CONFIG_NF_CONNTRACK_SECMARK
	int len, ret;

	ret = security_secid_to_secctx(ct->secmark, NULL, &len);
	if (ret)
		return 0;

	return nla_total_size(0) /* CTA_SECCTX */
	       + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */
#else
	return 0;
#endif
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_parse_tuple_ip(struct nlattr *attr,
				    struct nf_conntrack_tuple *tuple,
				    u_int32_t flags)
{
	struct nlattr *tb[CTA_IP_MAX+1];
	int ret = 0;

	ret = nla_parse_nested_deprecated(tb, CTA_IP_MAX, attr, NULL, NULL);
	if (ret < 0)
		return ret;

	ret = nla_validate_nested_deprecated(attr, CTA_IP_MAX,
					     cta_ip_nla_policy, NULL);
	if (ret)
		return ret;

	switch (tuple->src.l3num) {
	case NFPROTO_IPV4:
		ret = ipv4_nlattr_to_tuple(tb, tuple, flags);
		break;
	case NFPROTO_IPV6:
		ret = ipv6_nlattr_to_tuple(tb, tuple, flags);
		break;
	}

	return ret;
}

Project: linux
File: nf_conntrack_netlink.c

static bool expect_iter_all(struct nf_conntrack_expect *exp, void *data)
{
	return true;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_update_status(struct nf_conn *ct, const struct nlattr * const cda[])
{
	unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS]));
	unsigned long d = ct->status ^ status;

	if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
		/* SEEN_REPLY bit can only be set */
		return -EBUSY;

	if (d & IPS_ASSURED && !(status & IPS_ASSURED))
		/* ASSURED bit can only be set */
		return -EBUSY;

	/* This check is less strict than ctnetlink_change_status()
	 * because callers often flip IPS_EXPECTED bits when sending
	 * an NFQA_CT attribute to the kernel.  So ignore the
	 * unchangeable bits but do not error out. Also user programs
	 * are allowed to clear the bits that they are allowed to change.
	 */
	__ctnetlink_change_status(ct, status, ~status);
	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

ctnetlink_parse_tuple_filter(const struct nlattr * const cda[],
			      struct nf_conntrack_tuple *tuple, u32 type,
			      u_int8_t l3num, struct nf_conntrack_zone *zone,
			      u_int32_t flags)
{
	struct nlattr *tb[CTA_TUPLE_MAX+1];
	int err;

	memset(tuple, 0, sizeof(*tuple));

	err = nla_parse_nested_deprecated(tb, CTA_TUPLE_MAX, cda[type],
					  tuple_nla_policy, NULL);
	if (err < 0)
		return err;

	if (l3num != NFPROTO_IPV4 && l3num != NFPROTO_IPV6)
		return -EOPNOTSUPP;
	tuple->src.l3num = l3num;

	if (flags & CTA_FILTER_FLAG(CTA_IP_DST) ||
	    flags & CTA_FILTER_FLAG(CTA_IP_SRC)) {
		if (!tb[CTA_TUPLE_IP])
			return -EINVAL;

		err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple, flags);
		if (err < 0)
			return err;
	}

	if (flags & CTA_FILTER_FLAG(CTA_PROTO_NUM)) {
		if (!tb[CTA_TUPLE_PROTO])
			return -EINVAL;

		err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple, flags);
		if (err < 0)
			return err;
	} else if (flags & CTA_FILTER_FLAG(ALL_CTA_PROTO)) {
		/* Can't manage proto flags without a protonum  */
		return -EINVAL;
	}

	if ((flags & CTA_FILTER_FLAG(CTA_TUPLE_ZONE)) && tb[CTA_TUPLE_ZONE]) {
		if (!zone)
			return -EINVAL;

		err = ctnetlink_parse_tuple_zone(tb[CTA_TUPLE_ZONE],
						 type, zone);
		if (err < 0)
			return err;
	}

	/* orig and expect tuples get DIR_ORIGINAL */
	if (type == CTA_TUPLE_REPLY)
		tuple->dst.dir = IP_CT_DIR_REPLY;
	else
		tuple->dst.dir = IP_CT_DIR_ORIGINAL;

	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

static void __net_exit ctnetlink_net_exit_batch(struct list_head *net_exit_list)
{
	struct net *net;

	list_for_each_entry(net, net_exit_list, exit_list)
		ctnetlink_net_exit(net);

	/* wait for other cpus until they are done with ctnl_notifiers */
	synchronize_rcu();
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_change_protoinfo(struct nf_conn *ct,
				      const struct nlattr * const cda[])
{
	const struct nlattr *attr = cda[CTA_PROTOINFO];
	const struct nf_conntrack_l4proto *l4proto;
	struct nlattr *tb[CTA_PROTOINFO_MAX+1];
	int err = 0;

	err = nla_parse_nested_deprecated(tb, CTA_PROTOINFO_MAX, attr,
					  protoinfo_policy, NULL);
	if (err < 0)
		return err;

	l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
	if (l4proto->from_nlattr)
		err = l4proto->from_nlattr(tb, ct);

	return err;
}

Project: linux
File: nf_conntrack_netlink.c

static bool ctnetlink_needs_filter(u8 family, const struct nlattr * const *cda)
{
	return family || cda[CTA_MARK] || cda[CTA_FILTER];
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_start(struct netlink_callback *cb)
{
	const struct nlattr * const *cda = cb->data;
	struct ctnetlink_filter *filter = NULL;
	struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
	u8 family = nfmsg->nfgen_family;

	if (ctnetlink_needs_filter(family, cda)) {
		filter = ctnetlink_alloc_filter(cda, family);
		if (IS_ERR(filter))
			return PTR_ERR(filter);
	}

	cb->data = filter;
	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_parse_filter(const struct nlattr *attr,
				  struct ctnetlink_filter *filter)
{
	struct nlattr *tb[CTA_FILTER_MAX + 1];
	int ret = 0;

	ret = nla_parse_nested(tb, CTA_FILTER_MAX, attr, cta_filter_nla_policy,
			       NULL);
	if (ret)
		return ret;

	if (tb[CTA_FILTER_ORIG_FLAGS]) {
		filter->orig_flags = nla_get_u32(tb[CTA_FILTER_ORIG_FLAGS]);
		if (filter->orig_flags & ~CTA_FILTER_F_ALL)
			return -EOPNOTSUPP;
	}

	if (tb[CTA_FILTER_REPLY_FLAGS]) {
		filter->reply_flags = nla_get_u32(tb[CTA_FILTER_REPLY_FLAGS]);
		if (filter->reply_flags & ~CTA_FILTER_F_ALL)
			return -EOPNOTSUPP;
	}

	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_stat_exp_cpu(struct net *net, struct sock *ctnl,
				  struct sk_buff *skb,
				  const struct nlmsghdr *nlh,
				  const struct nlattr * const cda[],
				  struct netlink_ext_ack *extack)
{
	if (nlh->nlmsg_flags & NLM_F_DUMP) {
		struct netlink_dump_control c = {
			.dump = ctnetlink_exp_stat_cpu_dump,
		};
		return netlink_dump_start(ctnl, skb, nlh, &c);
	}

	return 0;
}

Project: linux
File: nf_conntrack_netlink.c

static int ctnetlink_exp_dump_mask(struct sk_buff *skb,
				   const struct nf_conntrack_tuple *tuple,
				   const struct nf_conntrack_tuple_mask *mask)
{
	const struct nf_conntrack_l4proto *l4proto;
	struct nf_conntrack_tuple m;
	struct nlattr *nest_parms;
	int ret;

	memset(&m, 0xFF, sizeof(m));
	memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3));
	m.src.u.all = mask->src.u.all;
	m.dst.protonum = tuple->dst.protonum;

	nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK);
	if (!nest_parms)
		goto nla_put_failure;

	rcu_read_lock();
	ret = ctnetlink_dump_tuples_ip(skb, &m);
	if (ret >= 0) {
		l4proto = nf_ct_l4proto_find(tuple->dst.protonum);
		ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto);
	}
	rcu_read_unlock();

	if (unlikely(ret < 0))
		goto nla_put_failure;

	nla_nest_end(skb, nest_parms);

	return 0;

nla_put_failure:
	return -1;
}