[mirror_ubuntu-artful-kernel.git] / net / netfilter / nf_conntrack_proto_udp.c

/* (C) 1999-2001 Paul `Rusty' Russell
 * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/types.h>
#include <linux/timer.h>
#include <linux/module.h>
#include <linux/udp.h>
#include <linux/seq_file.h>
#include <linux/skbuff.h>
#include <linux/ipv6.h>
#include <net/ip6_checksum.h>
#include <net/checksum.h>

#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
#include <linux/netfilter_ipv6.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_ecache.h>
#include <net/netfilter/nf_log.h>
#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>

static unsigned int udp_timeouts[UDP_CT_MAX] = {
	[UDP_CT_UNREPLIED]	= 30*HZ,
	[UDP_CT_REPLIED]	= 180*HZ,
};

static inline struct nf_udp_net *udp_pernet(struct net *net)
{
	return &net->ct.nf_ct_proto.udp;
}

static bool udp_pkt_to_tuple(const struct sk_buff *skb,
			     unsigned int dataoff,
			     struct nf_conntrack_tuple *tuple)
{
	const struct udphdr *hp;
	struct udphdr _hdr;

	/* Actually only need first 8 bytes. */
	hp = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
	if (hp == NULL)
		return false;

	tuple->src.u.udp.port = hp->source;
	tuple->dst.u.udp.port = hp->dest;

	return true;
}

static bool udp_invert_tuple(struct nf_conntrack_tuple *tuple,
			     const struct nf_conntrack_tuple *orig)
{
	tuple->src.u.udp.port = orig->dst.u.udp.port;
	tuple->dst.u.udp.port = orig->src.u.udp.port;
	return true;
}

/* Print out the per-protocol part of the tuple. */
static int udp_print_tuple(struct seq_file *s,
			   const struct nf_conntrack_tuple *tuple)
{
	return seq_printf(s, "sport=%hu dport=%hu ",
			  ntohs(tuple->src.u.udp.port),
			  ntohs(tuple->dst.u.udp.port));
}

static unsigned int *udp_get_timeouts(struct net *net)
{
	return udp_pernet(net)->timeouts;
}

/* Returns verdict for packet, and may modify conntracktype */
static int udp_packet(struct nf_conn *ct,
		      const struct sk_buff *skb,
		      unsigned int dataoff,
		      enum ip_conntrack_info ctinfo,
		      u_int8_t pf,
		      unsigned int hooknum,
		      unsigned int *timeouts)
{
	/* If we've seen traffic both ways, this is some kind of UDP
	   stream.  Extend timeout. */
	if (test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) {
		nf_ct_refresh_acct(ct, ctinfo, skb,
				   timeouts[UDP_CT_REPLIED]);
		/* Also, more likely to be important, and not a probe */
		if (!test_and_set_bit(IPS_ASSURED_BIT, &ct->status))
			nf_conntrack_event_cache(IPCT_ASSURED, ct);
	} else {
		nf_ct_refresh_acct(ct, ctinfo, skb,
				   timeouts[UDP_CT_UNREPLIED]);
	}
	return NF_ACCEPT;
}

/* Called when a new connection for this protocol found. */
static bool udp_new(struct nf_conn *ct, const struct sk_buff *skb,
		    unsigned int dataoff, unsigned int *timeouts)
{
	return true;
}

static int udp_error(struct net *net, struct nf_conn *tmpl, struct sk_buff *skb,
		     unsigned int dataoff, enum ip_conntrack_info *ctinfo,
		     u_int8_t pf,
		     unsigned int hooknum)
{
	unsigned int udplen = skb->len - dataoff;
	const struct udphdr *hdr;
	struct udphdr _hdr;

	/* Header is too small? */
	hdr = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
	if (hdr == NULL) {
		if (LOG_INVALID(net, IPPROTO_UDP))
			nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
				      "nf_ct_udp: short packet ");
		return -NF_ACCEPT;
	}

	/* Truncated/malformed packets */
	if (ntohs(hdr->len) > udplen || ntohs(hdr->len) < sizeof(*hdr)) {
		if (LOG_INVALID(net, IPPROTO_UDP))
			nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
				"nf_ct_udp: truncated/malformed packet ");
		return -NF_ACCEPT;
	}

	/* Packet with no checksum */
	if (!hdr->check)
		return NF_ACCEPT;

	/* Checksum invalid? Ignore.
	 * We skip checking packets on the outgoing path
	 * because the checksum is assumed to be correct.
	 * FIXME: Source route IP option packets --RR */
	if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
	    nf_checksum(skb, hooknum, dataoff, IPPROTO_UDP, pf)) {
		if (LOG_INVALID(net, IPPROTO_UDP))
			nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
				"nf_ct_udp: bad UDP checksum ");
		return -NF_ACCEPT;
	}

	return NF_ACCEPT;
}

#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)

#include <linux/netfilter/nfnetlink.h>
#include <linux/netfilter/nfnetlink_cttimeout.h>

static int udp_timeout_nlattr_to_obj(struct nlattr *tb[],
				     struct net *net, void *data)
{
	unsigned int *timeouts = data;
	struct nf_udp_net *un = udp_pernet(net);

	/* set default timeouts for UDP. */
	timeouts[UDP_CT_UNREPLIED] = un->timeouts[UDP_CT_UNREPLIED];
	timeouts[UDP_CT_REPLIED] = un->timeouts[UDP_CT_REPLIED];

	if (tb[CTA_TIMEOUT_UDP_UNREPLIED]) {
		timeouts[UDP_CT_UNREPLIED] =
			ntohl(nla_get_be32(tb[CTA_TIMEOUT_UDP_UNREPLIED])) * HZ;
	}
	if (tb[CTA_TIMEOUT_UDP_REPLIED]) {
		timeouts[UDP_CT_REPLIED] =
			ntohl(nla_get_be32(tb[CTA_TIMEOUT_UDP_REPLIED])) * HZ;
	}
	return 0;
}

static int
udp_timeout_obj_to_nlattr(struct sk_buff *skb, const void *data)
{
	const unsigned int *timeouts = data;

	if (nla_put_be32(skb, CTA_TIMEOUT_UDP_UNREPLIED,
			 htonl(timeouts[UDP_CT_UNREPLIED] / HZ)) ||
	    nla_put_be32(skb, CTA_TIMEOUT_UDP_REPLIED,
			 htonl(timeouts[UDP_CT_REPLIED] / HZ)))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -ENOSPC;
}

static const struct nla_policy
udp_timeout_nla_policy[CTA_TIMEOUT_UDP_MAX+1] = {
       [CTA_TIMEOUT_UDP_UNREPLIED]	= { .type = NLA_U32 },
       [CTA_TIMEOUT_UDP_REPLIED]	= { .type = NLA_U32 },
};
#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */

#ifdef CONFIG_SYSCTL
static struct ctl_table udp_sysctl_table[] = {
	{
		.procname	= "nf_conntrack_udp_timeout",
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_jiffies,
	},
	{
		.procname	= "nf_conntrack_udp_timeout_stream",
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_jiffies,
	},
	{ }
};
#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
static struct ctl_table udp_compat_sysctl_table[] = {
	{
		.procname	= "ip_conntrack_udp_timeout",
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_jiffies,
	},
	{
		.procname	= "ip_conntrack_udp_timeout_stream",
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_jiffies,
	},
	{ }
};
#endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
#endif /* CONFIG_SYSCTL */

static int udp_kmemdup_sysctl_table(struct nf_proto_net *pn,
				    struct nf_udp_net *un)
{
#ifdef CONFIG_SYSCTL
	if (pn->ctl_table)
		return 0;
	pn->ctl_table = kmemdup(udp_sysctl_table,
				sizeof(udp_sysctl_table),
				GFP_KERNEL);
	if (!pn->ctl_table)
		return -ENOMEM;
	pn->ctl_table[0].data = &un->timeouts[UDP_CT_UNREPLIED];
	pn->ctl_table[1].data = &un->timeouts[UDP_CT_REPLIED];
#endif
	return 0;
}

static int udp_kmemdup_compat_sysctl_table(struct nf_proto_net *pn,
					   struct nf_udp_net *un)
{
#ifdef CONFIG_SYSCTL
#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
	pn->ctl_compat_table = kmemdup(udp_compat_sysctl_table,
				       sizeof(udp_compat_sysctl_table),
				       GFP_KERNEL);
	if (!pn->ctl_compat_table)
		return -ENOMEM;

	pn->ctl_compat_table[0].data = &un->timeouts[UDP_CT_UNREPLIED];
	pn->ctl_compat_table[1].data = &un->timeouts[UDP_CT_REPLIED];
#endif
#endif
	return 0;
}

static int udp_init_net(struct net *net, u_int16_t proto)
{
	int ret;
	struct nf_udp_net *un = udp_pernet(net);
	struct nf_proto_net *pn = &un->pn;

	if (!pn->users) {
		int i;

		for (i = 0; i < UDP_CT_MAX; i++)
			un->timeouts[i] = udp_timeouts[i];
	}

	if (proto == AF_INET) {
		ret = udp_kmemdup_compat_sysctl_table(pn, un);
		if (ret < 0)
			return ret;

		ret = udp_kmemdup_sysctl_table(pn, un);
		if (ret < 0)
			nf_ct_kfree_compat_sysctl_table(pn);
	} else
		ret = udp_kmemdup_sysctl_table(pn, un);

	return ret;
}

struct nf_conntrack_l4proto nf_conntrack_l4proto_udp4 __read_mostly =
{
	.l3proto		= PF_INET,
	.l4proto		= IPPROTO_UDP,
	.name			= "udp",
	.pkt_to_tuple		= udp_pkt_to_tuple,
	.invert_tuple		= udp_invert_tuple,
	.print_tuple		= udp_print_tuple,
	.packet			= udp_packet,
	.get_timeouts		= udp_get_timeouts,
	.new			= udp_new,
	.error			= udp_error,
#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
	.tuple_to_nlattr	= nf_ct_port_tuple_to_nlattr,
	.nlattr_to_tuple	= nf_ct_port_nlattr_to_tuple,
	.nlattr_tuple_size	= nf_ct_port_nlattr_tuple_size,
	.nla_policy		= nf_ct_port_nla_policy,
#endif
#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	.ctnl_timeout		= {
		.nlattr_to_obj	= udp_timeout_nlattr_to_obj,
		.obj_to_nlattr	= udp_timeout_obj_to_nlattr,
		.nlattr_max	= CTA_TIMEOUT_UDP_MAX,
		.obj_size	= sizeof(unsigned int) * CTA_TIMEOUT_UDP_MAX,
		.nla_policy	= udp_timeout_nla_policy,
	},
#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
	.init_net		= udp_init_net,
};
EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udp4);

struct nf_conntrack_l4proto nf_conntrack_l4proto_udp6 __read_mostly =
{
	.l3proto		= PF_INET6,
	.l4proto		= IPPROTO_UDP,
	.name			= "udp",
	.pkt_to_tuple		= udp_pkt_to_tuple,
	.invert_tuple		= udp_invert_tuple,
	.print_tuple		= udp_print_tuple,
	.packet			= udp_packet,
	.get_timeouts		= udp_get_timeouts,
	.new			= udp_new,
	.error			= udp_error,
#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
	.tuple_to_nlattr	= nf_ct_port_tuple_to_nlattr,
	.nlattr_to_tuple	= nf_ct_port_nlattr_to_tuple,
	.nlattr_tuple_size	= nf_ct_port_nlattr_tuple_size,
	.nla_policy		= nf_ct_port_nla_policy,
#endif
#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	.ctnl_timeout		= {
		.nlattr_to_obj	= udp_timeout_nlattr_to_obj,
		.obj_to_nlattr	= udp_timeout_obj_to_nlattr,
		.nlattr_max	= CTA_TIMEOUT_UDP_MAX,
		.obj_size	= sizeof(unsigned int) * CTA_TIMEOUT_UDP_MAX,
		.nla_policy	= udp_timeout_nla_policy,
	},
#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
	.init_net		= udp_init_net,
};
EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udp6);
Commit	Line	Data
9fb9cbb1 YK	1	/* (C) 1999-2001 Paul `Rusty' Russell
	2	* (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 as
	6	* published by the Free Software Foundation.
9fb9cbb1 YK	7	*/
	8
	9	#include <linux/types.h>
9fb9cbb1 YK	10	#include <linux/timer.h>
9fb9cbb1 YK	11	#include <linux/module.h>
9fb9cbb1 YK	12	#include <linux/udp.h>
	13	#include <linux/seq_file.h>
	14	#include <linux/skbuff.h>
	15	#include <linux/ipv6.h>
	16	#include <net/ip6_checksum.h>
	17	#include <net/checksum.h>
f6180121	18
9fb9cbb1 YK	19	#include <linux/netfilter.h>
	20	#include <linux/netfilter_ipv4.h>
	21	#include <linux/netfilter_ipv6.h>
605dcad6	22	#include <net/netfilter/nf_conntrack_l4proto.h>
f6180121	23	#include <net/netfilter/nf_conntrack_ecache.h>
f01ffbd6	24	#include <net/netfilter/nf_log.h>
9d2493f8 CP	25	#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
9d2493f8 CP	26	#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
9fb9cbb1	27
5a41db94 PNA	28	static unsigned int udp_timeouts[UDP_CT_MAX] = {
	29	[UDP_CT_UNREPLIED] = 30*HZ,
	30	[UDP_CT_REPLIED] = 180*HZ,
	31	};
9fb9cbb1	32
0ce490ad G	33	static inline struct nf_udp_net udp_pernet(struct net net)
	34	{
	35	return &net->ct.nf_ct_proto.udp;
	36	}
	37
09f263cd	38	static bool udp_pkt_to_tuple(const struct sk_buff *skb,
9fb9cbb1 YK	39	unsigned int dataoff,
	40	struct nf_conntrack_tuple *tuple)
	41	{
da3f13c9 JE	42	const struct udphdr *hp;
da3f13c9 JE	43	struct udphdr _hdr;
9fb9cbb1 YK	44
	45	/* Actually only need first 8 bytes. */
	46	hp = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
	47	if (hp == NULL)
09f263cd	48	return false;
9fb9cbb1 YK	49
	50	tuple->src.u.udp.port = hp->source;
	51	tuple->dst.u.udp.port = hp->dest;
	52
09f263cd	53	return true;
9fb9cbb1 YK	54	}
9fb9cbb1 YK	55
09f263cd JE	56	static bool udp_invert_tuple(struct nf_conntrack_tuple *tuple,
09f263cd JE	57	const struct nf_conntrack_tuple *orig)
9fb9cbb1 YK	58	{
	59	tuple->src.u.udp.port = orig->dst.u.udp.port;
	60	tuple->dst.u.udp.port = orig->src.u.udp.port;
09f263cd	61	return true;
9fb9cbb1 YK	62	}
	63
	64	/* Print out the per-protocol part of the tuple. */
	65	static int udp_print_tuple(struct seq_file *s,
	66	const struct nf_conntrack_tuple *tuple)
	67	{
	68	return seq_printf(s, "sport=%hu dport=%hu ",
	69	ntohs(tuple->src.u.udp.port),
	70	ntohs(tuple->dst.u.udp.port));
	71	}
	72
2c8503f5 PNA	73	static unsigned int udp_get_timeouts(struct net net)
2c8503f5 PNA	74	{
0ce490ad	75	return udp_pernet(net)->timeouts;
2c8503f5 PNA	76	}
2c8503f5 PNA	77
9fb9cbb1	78	/* Returns verdict for packet, and may modify conntracktype */
c88130bc	79	static int udp_packet(struct nf_conn *ct,
9fb9cbb1 YK	80	const struct sk_buff *skb,
	81	unsigned int dataoff,
	82	enum ip_conntrack_info ctinfo,
76108cea	83	u_int8_t pf,
2c8503f5 PNA	84	unsigned int hooknum,
2c8503f5 PNA	85	unsigned int *timeouts)
9fb9cbb1 YK	86	{
	87	/* If we've seen traffic both ways, this is some kind of UDP
	88	stream. Extend timeout. */
c88130bc	89	if (test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) {
5a41db94	90	nf_ct_refresh_acct(ct, ctinfo, skb,
2c8503f5	91	timeouts[UDP_CT_REPLIED]);
9fb9cbb1	92	/* Also, more likely to be important, and not a probe */
c88130bc	93	if (!test_and_set_bit(IPS_ASSURED_BIT, &ct->status))
858b3133	94	nf_conntrack_event_cache(IPCT_ASSURED, ct);
5a41db94 PNA	95	} else {
5a41db94 PNA	96	nf_ct_refresh_acct(ct, ctinfo, skb,
2c8503f5	97	timeouts[UDP_CT_UNREPLIED]);
5a41db94	98	}
9fb9cbb1 YK	99	return NF_ACCEPT;
	100	}
	101
	102	/* Called when a new connection for this protocol found. */
09f263cd	103	static bool udp_new(struct nf_conn ct, const struct sk_buff skb,
2c8503f5	104	unsigned int dataoff, unsigned int *timeouts)
9fb9cbb1	105	{
09f263cd	106	return true;
9fb9cbb1 YK	107	}
9fb9cbb1 YK	108
8fea97ec PM	109	static int udp_error(struct net net, struct nf_conn tmpl, struct sk_buff *skb,
8fea97ec PM	110	unsigned int dataoff, enum ip_conntrack_info *ctinfo,
76108cea	111	u_int8_t pf,
96f6bf82	112	unsigned int hooknum)
9fb9cbb1 YK	113	{
9fb9cbb1 YK	114	unsigned int udplen = skb->len - dataoff;
da3f13c9 JE	115	const struct udphdr *hdr;
da3f13c9 JE	116	struct udphdr _hdr;
9fb9cbb1 YK	117
	118	/* Header is too small? */
	119	hdr = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
	120	if (hdr == NULL) {
c2a2c7e0	121	if (LOG_INVALID(net, IPPROTO_UDP))
9fb9cbb1 YK	122	nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
	123	"nf_ct_udp: short packet ");
	124	return -NF_ACCEPT;
	125	}
	126
	127	/* Truncated/malformed packets */
	128	if (ntohs(hdr->len) > udplen \|\| ntohs(hdr->len) < sizeof(*hdr)) {
c2a2c7e0	129	if (LOG_INVALID(net, IPPROTO_UDP))
9fb9cbb1 YK	130	nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
	131	"nf_ct_udp: truncated/malformed packet ");
	132	return -NF_ACCEPT;
	133	}
	134
	135	/* Packet with no checksum */
	136	if (!hdr->check)
	137	return NF_ACCEPT;
	138
	139	/* Checksum invalid? Ignore.
	140	* We skip checking packets on the outgoing path
84fa7933	141	* because the checksum is assumed to be correct.
9fb9cbb1	142	* FIXME: Source route IP option packets --RR */
c04d0552	143	if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
96f6bf82	144	nf_checksum(skb, hooknum, dataoff, IPPROTO_UDP, pf)) {
c2a2c7e0	145	if (LOG_INVALID(net, IPPROTO_UDP))
9fb9cbb1 YK	146	nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
	147	"nf_ct_udp: bad UDP checksum ");
	148	return -NF_ACCEPT;
	149	}
	150
	151	return NF_ACCEPT;
	152	}
	153
50978462 PNA	154	#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	155
	156	#include <linux/netfilter/nfnetlink.h>
	157	#include <linux/netfilter/nfnetlink_cttimeout.h>
	158
8264deb8 G	159	static int udp_timeout_nlattr_to_obj(struct nlattr *tb[],
8264deb8 G	160	struct net net, void data)
50978462 PNA	161	{
50978462 PNA	162	unsigned int *timeouts = data;
8264deb8	163	struct nf_udp_net *un = udp_pernet(net);
50978462 PNA	164
50978462 PNA	165	/* set default timeouts for UDP. */
8264deb8 G	166	timeouts[UDP_CT_UNREPLIED] = un->timeouts[UDP_CT_UNREPLIED];
8264deb8 G	167	timeouts[UDP_CT_REPLIED] = un->timeouts[UDP_CT_REPLIED];
50978462 PNA	168
	169	if (tb[CTA_TIMEOUT_UDP_UNREPLIED]) {
	170	timeouts[UDP_CT_UNREPLIED] =
	171	ntohl(nla_get_be32(tb[CTA_TIMEOUT_UDP_UNREPLIED])) * HZ;
	172	}
	173	if (tb[CTA_TIMEOUT_UDP_REPLIED]) {
	174	timeouts[UDP_CT_REPLIED] =
	175	ntohl(nla_get_be32(tb[CTA_TIMEOUT_UDP_REPLIED])) * HZ;
	176	}
	177	return 0;
	178	}
	179
	180	static int
	181	udp_timeout_obj_to_nlattr(struct sk_buff skb, const void data)
	182	{
	183	const unsigned int *timeouts = data;
	184
3c60a17b DM	185	if (nla_put_be32(skb, CTA_TIMEOUT_UDP_UNREPLIED,
	186	htonl(timeouts[UDP_CT_UNREPLIED] / HZ)) \|\|
	187	nla_put_be32(skb, CTA_TIMEOUT_UDP_REPLIED,
	188	htonl(timeouts[UDP_CT_REPLIED] / HZ)))
	189	goto nla_put_failure;
50978462 PNA	190	return 0;
	191
	192	nla_put_failure:
	193	return -ENOSPC;
	194	}
	195
	196	static const struct nla_policy
	197	udp_timeout_nla_policy[CTA_TIMEOUT_UDP_MAX+1] = {
	198	[CTA_TIMEOUT_UDP_UNREPLIED] = { .type = NLA_U32 },
	199	[CTA_TIMEOUT_UDP_REPLIED] = { .type = NLA_U32 },
	200	};
	201	#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
	202
933a41e7	203	#ifdef CONFIG_SYSCTL
933a41e7 PM	204	static struct ctl_table udp_sysctl_table[] = {
933a41e7 PM	205	{
933a41e7	206	.procname = "nf_conntrack_udp_timeout",
933a41e7 PM	207	.maxlen = sizeof(unsigned int),
933a41e7 PM	208	.mode = 0644,
6d9f239a	209	.proc_handler = proc_dointvec_jiffies,
933a41e7 PM	210	},
933a41e7 PM	211	{
933a41e7	212	.procname = "nf_conntrack_udp_timeout_stream",
933a41e7 PM	213	.maxlen = sizeof(unsigned int),
933a41e7 PM	214	.mode = 0644,
6d9f239a	215	.proc_handler = proc_dointvec_jiffies,
933a41e7	216	},
f8572d8f	217	{ }
933a41e7	218	};
a999e683 PM	219	#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
	220	static struct ctl_table udp_compat_sysctl_table[] = {
	221	{
a999e683	222	.procname = "ip_conntrack_udp_timeout",
a999e683 PM	223	.maxlen = sizeof(unsigned int),
a999e683 PM	224	.mode = 0644,
6d9f239a	225	.proc_handler = proc_dointvec_jiffies,
a999e683 PM	226	},
a999e683 PM	227	{
a999e683	228	.procname = "ip_conntrack_udp_timeout_stream",
a999e683 PM	229	.maxlen = sizeof(unsigned int),
a999e683 PM	230	.mode = 0644,
6d9f239a	231	.proc_handler = proc_dointvec_jiffies,
a999e683	232	},
f8572d8f	233	{ }
a999e683 PM	234	};
a999e683 PM	235	#endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
933a41e7 PM	236	#endif /* CONFIG_SYSCTL */
933a41e7 PM	237
dee7364e G	238	static int udp_kmemdup_sysctl_table(struct nf_proto_net *pn,
dee7364e G	239	struct nf_udp_net *un)
0ce490ad G	240	{
0ce490ad G	241	#ifdef CONFIG_SYSCTL
0ce490ad G	242	if (pn->ctl_table)
	243	return 0;
	244	pn->ctl_table = kmemdup(udp_sysctl_table,
	245	sizeof(udp_sysctl_table),
	246	GFP_KERNEL);
	247	if (!pn->ctl_table)
	248	return -ENOMEM;
	249	pn->ctl_table[0].data = &un->timeouts[UDP_CT_UNREPLIED];
	250	pn->ctl_table[1].data = &un->timeouts[UDP_CT_REPLIED];
	251	#endif
	252	return 0;
	253	}
	254
dee7364e G	255	static int udp_kmemdup_compat_sysctl_table(struct nf_proto_net *pn,
dee7364e G	256	struct nf_udp_net *un)
0ce490ad G	257	{
	258	#ifdef CONFIG_SYSCTL
	259	#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
0ce490ad G	260	pn->ctl_compat_table = kmemdup(udp_compat_sysctl_table,
	261	sizeof(udp_compat_sysctl_table),
	262	GFP_KERNEL);
	263	if (!pn->ctl_compat_table)
	264	return -ENOMEM;
	265
	266	pn->ctl_compat_table[0].data = &un->timeouts[UDP_CT_UNREPLIED];
	267	pn->ctl_compat_table[1].data = &un->timeouts[UDP_CT_REPLIED];
	268	#endif
	269	#endif
	270	return 0;
	271	}
	272
dee7364e	273	static int udp_init_net(struct net *net, u_int16_t proto)
0ce490ad G	274	{
	275	int ret;
	276	struct nf_udp_net *un = udp_pernet(net);
dee7364e	277	struct nf_proto_net *pn = &un->pn;
0ce490ad	278
dee7364e G	279	if (!pn->users) {
dee7364e G	280	int i;
0ce490ad	281
dee7364e G	282	for (i = 0; i < UDP_CT_MAX; i++)
dee7364e G	283	un->timeouts[i] = udp_timeouts[i];
0ce490ad	284	}
0ce490ad	285
dee7364e G	286	if (proto == AF_INET) {
	287	ret = udp_kmemdup_compat_sysctl_table(pn, un);
	288	if (ret < 0)
	289	return ret;
0ce490ad	290
dee7364e G	291	ret = udp_kmemdup_sysctl_table(pn, un);
	292	if (ret < 0)
	293	nf_ct_kfree_compat_sysctl_table(pn);
	294	} else
	295	ret = udp_kmemdup_sysctl_table(pn, un);
	296
	297	return ret;
0ce490ad G	298	}
0ce490ad G	299
61075af5	300	struct nf_conntrack_l4proto nf_conntrack_l4proto_udp4 __read_mostly =
9fb9cbb1 YK	301	{
9fb9cbb1 YK	302	.l3proto = PF_INET,
605dcad6	303	.l4proto = IPPROTO_UDP,
9fb9cbb1 YK	304	.name = "udp",
	305	.pkt_to_tuple = udp_pkt_to_tuple,
	306	.invert_tuple = udp_invert_tuple,
	307	.print_tuple = udp_print_tuple,
9fb9cbb1	308	.packet = udp_packet,
2c8503f5	309	.get_timeouts = udp_get_timeouts,
9fb9cbb1	310	.new = udp_new,
96f6bf82	311	.error = udp_error,
c0cd1156	312	#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
fdf70832 PM	313	.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
fdf70832 PM	314	.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
a400c30e	315	.nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
f73e924c	316	.nla_policy = nf_ct_port_nla_policy,
c1d10adb	317	#endif
50978462 PNA	318	#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	319	.ctnl_timeout = {
	320	.nlattr_to_obj = udp_timeout_nlattr_to_obj,
	321	.obj_to_nlattr = udp_timeout_obj_to_nlattr,
	322	.nlattr_max = CTA_TIMEOUT_UDP_MAX,
	323	.obj_size = sizeof(unsigned int) * CTA_TIMEOUT_UDP_MAX,
	324	.nla_policy = udp_timeout_nla_policy,
	325	},
	326	#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
dee7364e	327	.init_net = udp_init_net,
9fb9cbb1	328	};
13b18339	329	EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udp4);
9fb9cbb1	330
61075af5	331	struct nf_conntrack_l4proto nf_conntrack_l4proto_udp6 __read_mostly =
9fb9cbb1 YK	332	{
9fb9cbb1 YK	333	.l3proto = PF_INET6,
605dcad6	334	.l4proto = IPPROTO_UDP,
9fb9cbb1 YK	335	.name = "udp",
	336	.pkt_to_tuple = udp_pkt_to_tuple,
	337	.invert_tuple = udp_invert_tuple,
	338	.print_tuple = udp_print_tuple,
9fb9cbb1	339	.packet = udp_packet,
2c8503f5	340	.get_timeouts = udp_get_timeouts,
9fb9cbb1	341	.new = udp_new,
96f6bf82	342	.error = udp_error,
c0cd1156	343	#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
fdf70832 PM	344	.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
fdf70832 PM	345	.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
a400c30e	346	.nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
f73e924c	347	.nla_policy = nf_ct_port_nla_policy,
c1d10adb	348	#endif
50978462 PNA	349	#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	350	.ctnl_timeout = {
	351	.nlattr_to_obj = udp_timeout_nlattr_to_obj,
	352	.obj_to_nlattr = udp_timeout_obj_to_nlattr,
	353	.nlattr_max = CTA_TIMEOUT_UDP_MAX,
	354	.obj_size = sizeof(unsigned int) * CTA_TIMEOUT_UDP_MAX,
	355	.nla_policy = udp_timeout_nla_policy,
	356	},
	357	#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
dee7364e	358	.init_net = udp_init_net,
9fb9cbb1	359	};
13b18339	360	EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udp6);