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

/* (C) 1999-2001 Paul `Rusty' Russell
 * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
 * (C) 2006-2012 Patrick McHardy <kaber@trash.net>
 *
 * 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 net *net,
			     struct nf_conntrack_tuple *tuple)
{
	const struct udphdr *hp;
	struct udphdr _hdr;

	/* Actually only need first 4 bytes to get ports. */
	hp = skb_header_pointer(skb, dataoff, 4, &_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 void udp_print_tuple(struct seq_file *s,
			    const struct nf_conntrack_tuple *tuple)
{
	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(net, 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(net, 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(net, 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,
	},
	{ }
};
#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_init_net(struct net *net, u_int16_t proto)
{
	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];
	}

	return udp_kmemdup_sysctl_table(pn, un);
}

static struct nf_proto_net *udp_get_net_proto(struct net *net)
{
	return &net->ct.nf_ct_proto.udp.pn;
}

struct nf_conntrack_l4proto nf_conntrack_l4proto_udp4 __read_mostly =
{
	.l3proto		= PF_INET,
	.l4proto		= IPPROTO_UDP,
	.name			= "udp",
	.allow_clash		= true,
	.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,
	.get_net_proto		= udp_get_net_proto,
};
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",
	.allow_clash		= true,
	.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,
	.get_net_proto		= udp_get_net_proto,
};
EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udp6);
Commit	Line	Data
9fb9cbb1 YK	1	/* (C) 1999-2001 Paul `Rusty' Russell
9fb9cbb1 YK	2	* (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
f229f6ce	3	* (C) 2006-2012 Patrick McHardy <kaber@trash.net>
9fb9cbb1 YK	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License version 2 as
	7	* published by the Free Software Foundation.
9fb9cbb1 YK	8	*/
	9
	10	#include <linux/types.h>
9fb9cbb1 YK	11	#include <linux/timer.h>
9fb9cbb1 YK	12	#include <linux/module.h>
9fb9cbb1 YK	13	#include <linux/udp.h>
	14	#include <linux/seq_file.h>
	15	#include <linux/skbuff.h>
	16	#include <linux/ipv6.h>
	17	#include <net/ip6_checksum.h>
	18	#include <net/checksum.h>
f6180121	19
9fb9cbb1 YK	20	#include <linux/netfilter.h>
	21	#include <linux/netfilter_ipv4.h>
	22	#include <linux/netfilter_ipv6.h>
605dcad6	23	#include <net/netfilter/nf_conntrack_l4proto.h>
f6180121	24	#include <net/netfilter/nf_conntrack_ecache.h>
f01ffbd6	25	#include <net/netfilter/nf_log.h>
9d2493f8 CP	26	#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
9d2493f8 CP	27	#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
9fb9cbb1	28
5a41db94 PNA	29	static unsigned int udp_timeouts[UDP_CT_MAX] = {
	30	[UDP_CT_UNREPLIED] = 30*HZ,
	31	[UDP_CT_REPLIED] = 180*HZ,
	32	};
9fb9cbb1	33
0ce490ad G	34	static inline struct nf_udp_net udp_pernet(struct net net)
	35	{
	36	return &net->ct.nf_ct_proto.udp;
	37	}
	38
09f263cd	39	static bool udp_pkt_to_tuple(const struct sk_buff *skb,
9fb9cbb1	40	unsigned int dataoff,
a31f1adc	41	struct net *net,
9fb9cbb1 YK	42	struct nf_conntrack_tuple *tuple)
9fb9cbb1 YK	43	{
da3f13c9 JE	44	const struct udphdr *hp;
da3f13c9 JE	45	struct udphdr _hdr;
9fb9cbb1	46
e5e693ab GF	47	/* Actually only need first 4 bytes to get ports. */
e5e693ab GF	48	hp = skb_header_pointer(skb, dataoff, 4, &_hdr);
9fb9cbb1	49	if (hp == NULL)
09f263cd	50	return false;
9fb9cbb1 YK	51
	52	tuple->src.u.udp.port = hp->source;
	53	tuple->dst.u.udp.port = hp->dest;
	54
09f263cd	55	return true;
9fb9cbb1 YK	56	}
9fb9cbb1 YK	57
09f263cd JE	58	static bool udp_invert_tuple(struct nf_conntrack_tuple *tuple,
09f263cd JE	59	const struct nf_conntrack_tuple *orig)
9fb9cbb1 YK	60	{
	61	tuple->src.u.udp.port = orig->dst.u.udp.port;
	62	tuple->dst.u.udp.port = orig->src.u.udp.port;
09f263cd	63	return true;
9fb9cbb1 YK	64	}
	65
	66	/* Print out the per-protocol part of the tuple. */
824f1fbe JP	67	static void udp_print_tuple(struct seq_file *s,
824f1fbe JP	68	const struct nf_conntrack_tuple *tuple)
9fb9cbb1	69	{
824f1fbe JP	70	seq_printf(s, "sport=%hu dport=%hu ",
	71	ntohs(tuple->src.u.udp.port),
	72	ntohs(tuple->dst.u.udp.port));
9fb9cbb1 YK	73	}
9fb9cbb1 YK	74
2c8503f5 PNA	75	static unsigned int udp_get_timeouts(struct net net)
2c8503f5 PNA	76	{
0ce490ad	77	return udp_pernet(net)->timeouts;
2c8503f5 PNA	78	}
2c8503f5 PNA	79
9fb9cbb1	80	/* Returns verdict for packet, and may modify conntracktype */
c88130bc	81	static int udp_packet(struct nf_conn *ct,
9fb9cbb1 YK	82	const struct sk_buff *skb,
	83	unsigned int dataoff,
	84	enum ip_conntrack_info ctinfo,
76108cea	85	u_int8_t pf,
2c8503f5 PNA	86	unsigned int hooknum,
2c8503f5 PNA	87	unsigned int *timeouts)
9fb9cbb1 YK	88	{
	89	/* If we've seen traffic both ways, this is some kind of UDP
	90	stream. Extend timeout. */
c88130bc	91	if (test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) {
5a41db94	92	nf_ct_refresh_acct(ct, ctinfo, skb,
2c8503f5	93	timeouts[UDP_CT_REPLIED]);
9fb9cbb1	94	/* Also, more likely to be important, and not a probe */
c88130bc	95	if (!test_and_set_bit(IPS_ASSURED_BIT, &ct->status))
858b3133	96	nf_conntrack_event_cache(IPCT_ASSURED, ct);
5a41db94 PNA	97	} else {
5a41db94 PNA	98	nf_ct_refresh_acct(ct, ctinfo, skb,
2c8503f5	99	timeouts[UDP_CT_UNREPLIED]);
5a41db94	100	}
9fb9cbb1 YK	101	return NF_ACCEPT;
	102	}
	103
	104	/* Called when a new connection for this protocol found. */
09f263cd	105	static bool udp_new(struct nf_conn ct, const struct sk_buff skb,
2c8503f5	106	unsigned int dataoff, unsigned int *timeouts)
9fb9cbb1	107	{
09f263cd	108	return true;
9fb9cbb1 YK	109	}
9fb9cbb1 YK	110
8fea97ec PM	111	static int udp_error(struct net net, struct nf_conn tmpl, struct sk_buff *skb,
8fea97ec PM	112	unsigned int dataoff, enum ip_conntrack_info *ctinfo,
76108cea	113	u_int8_t pf,
96f6bf82	114	unsigned int hooknum)
9fb9cbb1 YK	115	{
9fb9cbb1 YK	116	unsigned int udplen = skb->len - dataoff;
da3f13c9 JE	117	const struct udphdr *hdr;
da3f13c9 JE	118	struct udphdr _hdr;
9fb9cbb1 YK	119
	120	/* Header is too small? */
	121	hdr = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
	122	if (hdr == NULL) {
c2a2c7e0	123	if (LOG_INVALID(net, IPPROTO_UDP))
30e0c6a6	124	nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
9fb9cbb1 YK	125	"nf_ct_udp: short packet ");
	126	return -NF_ACCEPT;
	127	}
	128
	129	/* Truncated/malformed packets */
	130	if (ntohs(hdr->len) > udplen \|\| ntohs(hdr->len) < sizeof(*hdr)) {
c2a2c7e0	131	if (LOG_INVALID(net, IPPROTO_UDP))
30e0c6a6	132	nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
9fb9cbb1 YK	133	"nf_ct_udp: truncated/malformed packet ");
	134	return -NF_ACCEPT;
	135	}
	136
	137	/* Packet with no checksum */
	138	if (!hdr->check)
	139	return NF_ACCEPT;
	140
	141	/* Checksum invalid? Ignore.
	142	* We skip checking packets on the outgoing path
84fa7933	143	* because the checksum is assumed to be correct.
9fb9cbb1	144	* FIXME: Source route IP option packets --RR */
c04d0552	145	if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
96f6bf82	146	nf_checksum(skb, hooknum, dataoff, IPPROTO_UDP, pf)) {
c2a2c7e0	147	if (LOG_INVALID(net, IPPROTO_UDP))
30e0c6a6	148	nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
9fb9cbb1 YK	149	"nf_ct_udp: bad UDP checksum ");
	150	return -NF_ACCEPT;
	151	}
	152
	153	return NF_ACCEPT;
	154	}
	155
50978462 PNA	156	#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	157
	158	#include <linux/netfilter/nfnetlink.h>
	159	#include <linux/netfilter/nfnetlink_cttimeout.h>
	160
8264deb8 G	161	static int udp_timeout_nlattr_to_obj(struct nlattr *tb[],
8264deb8 G	162	struct net net, void data)
50978462 PNA	163	{
50978462 PNA	164	unsigned int *timeouts = data;
8264deb8	165	struct nf_udp_net *un = udp_pernet(net);
50978462 PNA	166
50978462 PNA	167	/* set default timeouts for UDP. */
8264deb8 G	168	timeouts[UDP_CT_UNREPLIED] = un->timeouts[UDP_CT_UNREPLIED];
8264deb8 G	169	timeouts[UDP_CT_REPLIED] = un->timeouts[UDP_CT_REPLIED];
50978462 PNA	170
	171	if (tb[CTA_TIMEOUT_UDP_UNREPLIED]) {
	172	timeouts[UDP_CT_UNREPLIED] =
	173	ntohl(nla_get_be32(tb[CTA_TIMEOUT_UDP_UNREPLIED])) * HZ;
	174	}
	175	if (tb[CTA_TIMEOUT_UDP_REPLIED]) {
	176	timeouts[UDP_CT_REPLIED] =
	177	ntohl(nla_get_be32(tb[CTA_TIMEOUT_UDP_REPLIED])) * HZ;
	178	}
	179	return 0;
	180	}
	181
	182	static int
	183	udp_timeout_obj_to_nlattr(struct sk_buff skb, const void data)
	184	{
	185	const unsigned int *timeouts = data;
	186
3c60a17b DM	187	if (nla_put_be32(skb, CTA_TIMEOUT_UDP_UNREPLIED,
	188	htonl(timeouts[UDP_CT_UNREPLIED] / HZ)) \|\|
	189	nla_put_be32(skb, CTA_TIMEOUT_UDP_REPLIED,
	190	htonl(timeouts[UDP_CT_REPLIED] / HZ)))
	191	goto nla_put_failure;
50978462 PNA	192	return 0;
	193
	194	nla_put_failure:
	195	return -ENOSPC;
	196	}
	197
	198	static const struct nla_policy
	199	udp_timeout_nla_policy[CTA_TIMEOUT_UDP_MAX+1] = {
	200	[CTA_TIMEOUT_UDP_UNREPLIED] = { .type = NLA_U32 },
	201	[CTA_TIMEOUT_UDP_REPLIED] = { .type = NLA_U32 },
	202	};
	203	#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
	204
933a41e7	205	#ifdef CONFIG_SYSCTL
933a41e7 PM	206	static struct ctl_table udp_sysctl_table[] = {
933a41e7 PM	207	{
933a41e7	208	.procname = "nf_conntrack_udp_timeout",
933a41e7 PM	209	.maxlen = sizeof(unsigned int),
933a41e7 PM	210	.mode = 0644,
6d9f239a	211	.proc_handler = proc_dointvec_jiffies,
933a41e7 PM	212	},
933a41e7 PM	213	{
933a41e7	214	.procname = "nf_conntrack_udp_timeout_stream",
933a41e7 PM	215	.maxlen = sizeof(unsigned int),
933a41e7 PM	216	.mode = 0644,
6d9f239a	217	.proc_handler = proc_dointvec_jiffies,
933a41e7	218	},
f8572d8f	219	{ }
933a41e7 PM	220	};
	221	#endif /* CONFIG_SYSCTL */
	222
dee7364e G	223	static int udp_kmemdup_sysctl_table(struct nf_proto_net *pn,
dee7364e G	224	struct nf_udp_net *un)
0ce490ad G	225	{
0ce490ad G	226	#ifdef CONFIG_SYSCTL
0ce490ad G	227	if (pn->ctl_table)
	228	return 0;
	229	pn->ctl_table = kmemdup(udp_sysctl_table,
	230	sizeof(udp_sysctl_table),
	231	GFP_KERNEL);
	232	if (!pn->ctl_table)
	233	return -ENOMEM;
	234	pn->ctl_table[0].data = &un->timeouts[UDP_CT_UNREPLIED];
	235	pn->ctl_table[1].data = &un->timeouts[UDP_CT_REPLIED];
	236	#endif
	237	return 0;
	238	}
	239
dee7364e	240	static int udp_init_net(struct net *net, u_int16_t proto)
0ce490ad	241	{
0ce490ad	242	struct nf_udp_net *un = udp_pernet(net);
dee7364e	243	struct nf_proto_net *pn = &un->pn;
0ce490ad	244
dee7364e G	245	if (!pn->users) {
dee7364e G	246	int i;
0ce490ad	247
dee7364e G	248	for (i = 0; i < UDP_CT_MAX; i++)
dee7364e G	249	un->timeouts[i] = udp_timeouts[i];
0ce490ad	250	}
0ce490ad	251
adf05168	252	return udp_kmemdup_sysctl_table(pn, un);
0ce490ad G	253	}
0ce490ad G	254
08911475 PNA	255	static struct nf_proto_net udp_get_net_proto(struct net net)
	256	{
	257	return &net->ct.nf_ct_proto.udp.pn;
	258	}
	259
61075af5	260	struct nf_conntrack_l4proto nf_conntrack_l4proto_udp4 __read_mostly =
9fb9cbb1 YK	261	{
9fb9cbb1 YK	262	.l3proto = PF_INET,
605dcad6	263	.l4proto = IPPROTO_UDP,
9fb9cbb1	264	.name = "udp",
71d8c47f	265	.allow_clash = true,
9fb9cbb1 YK	266	.pkt_to_tuple = udp_pkt_to_tuple,
	267	.invert_tuple = udp_invert_tuple,
	268	.print_tuple = udp_print_tuple,
9fb9cbb1	269	.packet = udp_packet,
2c8503f5	270	.get_timeouts = udp_get_timeouts,
9fb9cbb1	271	.new = udp_new,
96f6bf82	272	.error = udp_error,
c0cd1156	273	#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
fdf70832 PM	274	.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
fdf70832 PM	275	.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
a400c30e	276	.nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
f73e924c	277	.nla_policy = nf_ct_port_nla_policy,
c1d10adb	278	#endif
50978462 PNA	279	#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	280	.ctnl_timeout = {
	281	.nlattr_to_obj = udp_timeout_nlattr_to_obj,
	282	.obj_to_nlattr = udp_timeout_obj_to_nlattr,
	283	.nlattr_max = CTA_TIMEOUT_UDP_MAX,
	284	.obj_size = sizeof(unsigned int) * CTA_TIMEOUT_UDP_MAX,
	285	.nla_policy = udp_timeout_nla_policy,
	286	},
	287	#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
dee7364e	288	.init_net = udp_init_net,
08911475	289	.get_net_proto = udp_get_net_proto,
9fb9cbb1	290	};
13b18339	291	EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udp4);
9fb9cbb1	292
61075af5	293	struct nf_conntrack_l4proto nf_conntrack_l4proto_udp6 __read_mostly =
9fb9cbb1 YK	294	{
9fb9cbb1 YK	295	.l3proto = PF_INET6,
605dcad6	296	.l4proto = IPPROTO_UDP,
9fb9cbb1	297	.name = "udp",
71d8c47f	298	.allow_clash = true,
9fb9cbb1 YK	299	.pkt_to_tuple = udp_pkt_to_tuple,
	300	.invert_tuple = udp_invert_tuple,
	301	.print_tuple = udp_print_tuple,
9fb9cbb1	302	.packet = udp_packet,
2c8503f5	303	.get_timeouts = udp_get_timeouts,
9fb9cbb1	304	.new = udp_new,
96f6bf82	305	.error = udp_error,
c0cd1156	306	#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
fdf70832 PM	307	.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
fdf70832 PM	308	.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
a400c30e	309	.nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
f73e924c	310	.nla_policy = nf_ct_port_nla_policy,
c1d10adb	311	#endif
50978462 PNA	312	#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	313	.ctnl_timeout = {
	314	.nlattr_to_obj = udp_timeout_nlattr_to_obj,
	315	.obj_to_nlattr = udp_timeout_obj_to_nlattr,
	316	.nlattr_max = CTA_TIMEOUT_UDP_MAX,
	317	.obj_size = sizeof(unsigned int) * CTA_TIMEOUT_UDP_MAX,
	318	.nla_policy = udp_timeout_nla_policy,
	319	},
	320	#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
dee7364e	321	.init_net = udp_init_net,
08911475	322	.get_net_proto = udp_get_net_proto,
9fb9cbb1	323	};
13b18339	324	EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udp6);