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

/* (C) 1999-2001 Paul `Rusty' Russell
 * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
 * (C) 2007 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/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>

static unsigned int udplite_timeouts[UDPLITE_CT_MAX] = {
	[UDPLITE_CT_UNREPLIED]	= 30*HZ,
	[UDPLITE_CT_REPLIED]	= 180*HZ,
};

static inline struct nf_udplite_net *udplite_pernet(struct net *net)
{
	return &net->ct.nf_ct_proto.udplite;
}

static bool udplite_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 udplite_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 udplite_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 *udplite_get_timeouts(struct net *net)
{
	return udplite_pernet(net)->timeouts;
}

/* Returns verdict for packet, and may modify conntracktype */
static int udplite_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[UDPLITE_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[UDPLITE_CT_UNREPLIED]);
	}
	return NF_ACCEPT;
}

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

static int udplite_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;
	unsigned int cscov;

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

	cscov = ntohs(hdr->len);
	if (cscov == 0)
		cscov = udplen;
	else if (cscov < sizeof(*hdr) || cscov > udplen) {
		if (LOG_INVALID(net, IPPROTO_UDPLITE))
			nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
				"nf_ct_udplite: invalid checksum coverage ");
		return -NF_ACCEPT;
	}

	/* UDPLITE mandates checksums */
	if (!hdr->check) {
		if (LOG_INVALID(net, IPPROTO_UDPLITE))
			nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
				      "nf_ct_udplite: checksum missing ");
		return -NF_ACCEPT;
	}

	/* Checksum invalid? Ignore. */
	if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
	    nf_checksum_partial(skb, hooknum, dataoff, cscov, IPPROTO_UDP,
	    			pf)) {
		if (LOG_INVALID(net, IPPROTO_UDPLITE))
			nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
				      "nf_ct_udplite: bad UDPLite 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 udplite_timeout_nlattr_to_obj(struct nlattr *tb[],
					 struct net *net, void *data)
{
	unsigned int *timeouts = data;
	struct nf_udplite_net *un = udplite_pernet(net);

	/* set default timeouts for UDPlite. */
	timeouts[UDPLITE_CT_UNREPLIED] = un->timeouts[UDPLITE_CT_UNREPLIED];
	timeouts[UDPLITE_CT_REPLIED] = un->timeouts[UDPLITE_CT_REPLIED];

	if (tb[CTA_TIMEOUT_UDPLITE_UNREPLIED]) {
		timeouts[UDPLITE_CT_UNREPLIED] =
		  ntohl(nla_get_be32(tb[CTA_TIMEOUT_UDPLITE_UNREPLIED])) * HZ;
	}
	if (tb[CTA_TIMEOUT_UDPLITE_REPLIED]) {
		timeouts[UDPLITE_CT_REPLIED] =
		  ntohl(nla_get_be32(tb[CTA_TIMEOUT_UDPLITE_REPLIED])) * HZ;
	}
	return 0;
}

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

	if (nla_put_be32(skb, CTA_TIMEOUT_UDPLITE_UNREPLIED,
			 htonl(timeouts[UDPLITE_CT_UNREPLIED] / HZ)) ||
	    nla_put_be32(skb, CTA_TIMEOUT_UDPLITE_REPLIED,
			 htonl(timeouts[UDPLITE_CT_REPLIED] / HZ)))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -ENOSPC;
}

static const struct nla_policy
udplite_timeout_nla_policy[CTA_TIMEOUT_UDPLITE_MAX+1] = {
	[CTA_TIMEOUT_UDPLITE_UNREPLIED]	= { .type = NLA_U32 },
	[CTA_TIMEOUT_UDPLITE_REPLIED]	= { .type = NLA_U32 },
};
#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */

#ifdef CONFIG_SYSCTL
static struct ctl_table udplite_sysctl_table[] = {
	{
		.procname	= "nf_conntrack_udplite_timeout",
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_jiffies,
	},
	{
		.procname	= "nf_conntrack_udplite_timeout_stream",
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_jiffies,
	},
	{ }
};
#endif /* CONFIG_SYSCTL */

static int udplite_kmemdup_sysctl_table(struct nf_proto_net *pn,
					struct nf_udplite_net *un)
{
#ifdef CONFIG_SYSCTL
	if (pn->ctl_table)
		return 0;

	pn->ctl_table = kmemdup(udplite_sysctl_table,
				sizeof(udplite_sysctl_table),
				GFP_KERNEL);
	if (!pn->ctl_table)
		return -ENOMEM;

	pn->ctl_table[0].data = &un->timeouts[UDPLITE_CT_UNREPLIED];
	pn->ctl_table[1].data = &un->timeouts[UDPLITE_CT_REPLIED];
#endif
	return 0;
}

static int udplite_init_net(struct net *net, u_int16_t proto)
{
	struct nf_udplite_net *un = udplite_pernet(net);
	struct nf_proto_net *pn = &un->pn;

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

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

	return udplite_kmemdup_sysctl_table(pn, un);
}

struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite4 __read_mostly =
{
	.l3proto		= PF_INET,
	.l4proto		= IPPROTO_UDPLITE,
	.name			= "udplite",
	.allow_clash		= true,
	.pkt_to_tuple		= udplite_pkt_to_tuple,
	.invert_tuple		= udplite_invert_tuple,
	.print_tuple		= udplite_print_tuple,
	.packet			= udplite_packet,
	.get_timeouts		= udplite_get_timeouts,
	.new			= udplite_new,
	.error			= udplite_error,
#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
	.tuple_to_nlattr	= nf_ct_port_tuple_to_nlattr,
	.nlattr_tuple_size	= nf_ct_port_nlattr_tuple_size,
	.nlattr_to_tuple	= nf_ct_port_nlattr_to_tuple,
	.nla_policy		= nf_ct_port_nla_policy,
#endif
#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	.ctnl_timeout		= {
		.nlattr_to_obj	= udplite_timeout_nlattr_to_obj,
		.obj_to_nlattr	= udplite_timeout_obj_to_nlattr,
		.nlattr_max	= CTA_TIMEOUT_UDPLITE_MAX,
		.obj_size	= sizeof(unsigned int) *
					CTA_TIMEOUT_UDPLITE_MAX,
		.nla_policy	= udplite_timeout_nla_policy,
	},
#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
	.init_net		= udplite_init_net,
};
EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udplite4);

struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite6 __read_mostly =
{
	.l3proto		= PF_INET6,
	.l4proto		= IPPROTO_UDPLITE,
	.name			= "udplite",
	.allow_clash		= true,
	.pkt_to_tuple		= udplite_pkt_to_tuple,
	.invert_tuple		= udplite_invert_tuple,
	.print_tuple		= udplite_print_tuple,
	.packet			= udplite_packet,
	.get_timeouts		= udplite_get_timeouts,
	.new			= udplite_new,
	.error			= udplite_error,
#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
	.tuple_to_nlattr	= nf_ct_port_tuple_to_nlattr,
	.nlattr_tuple_size	= nf_ct_port_nlattr_tuple_size,
	.nlattr_to_tuple	= nf_ct_port_nlattr_to_tuple,
	.nla_policy		= nf_ct_port_nla_policy,
#endif
#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	.ctnl_timeout		= {
		.nlattr_to_obj	= udplite_timeout_nlattr_to_obj,
		.obj_to_nlattr	= udplite_timeout_obj_to_nlattr,
		.nlattr_max	= CTA_TIMEOUT_UDPLITE_MAX,
		.obj_size	= sizeof(unsigned int) *
					CTA_TIMEOUT_UDPLITE_MAX,
		.nla_policy	= udplite_timeout_nla_policy,
	},
#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
	.init_net		= udplite_init_net,
};
EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udplite6);
Commit	Line	Data
59eecdfb PM	1	/* (C) 1999-2001 Paul `Rusty' Russell
	2	* (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
	3	* (C) 2007 Patrick McHardy <kaber@trash.net>
	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.
	8	*/
	9
	10	#include <linux/types.h>
	11	#include <linux/timer.h>
59eecdfb PM	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>
	18
	19	#include <linux/netfilter.h>
	20	#include <linux/netfilter_ipv4.h>
	21	#include <linux/netfilter_ipv6.h>
	22	#include <net/netfilter/nf_conntrack_l4proto.h>
	23	#include <net/netfilter/nf_conntrack_ecache.h>
f01ffbd6	24	#include <net/netfilter/nf_log.h>
59eecdfb	25
5a41db94 PNA	26	static unsigned int udplite_timeouts[UDPLITE_CT_MAX] = {
	27	[UDPLITE_CT_UNREPLIED] = 30*HZ,
	28	[UDPLITE_CT_REPLIED] = 180*HZ,
	29	};
59eecdfb	30
9b91c96c	31	static inline struct nf_udplite_net udplite_pernet(struct net net)
a8021fed	32	{
9b91c96c	33	return &net->ct.nf_ct_proto.udplite;
a8021fed G	34	}
a8021fed G	35
09f263cd JE	36	static bool udplite_pkt_to_tuple(const struct sk_buff *skb,
09f263cd JE	37	unsigned int dataoff,
a31f1adc	38	struct net *net,
09f263cd	39	struct nf_conntrack_tuple *tuple)
59eecdfb	40	{
da3f13c9 JE	41	const struct udphdr *hp;
da3f13c9 JE	42	struct udphdr _hdr;
59eecdfb	43
e5e693ab GF	44	/* Actually only need first 4 bytes to get ports. */
e5e693ab GF	45	hp = skb_header_pointer(skb, dataoff, 4, &_hdr);
59eecdfb	46	if (hp == NULL)
09f263cd	47	return false;
59eecdfb PM	48
	49	tuple->src.u.udp.port = hp->source;
	50	tuple->dst.u.udp.port = hp->dest;
09f263cd	51	return true;
59eecdfb PM	52	}
59eecdfb PM	53
09f263cd JE	54	static bool udplite_invert_tuple(struct nf_conntrack_tuple *tuple,
09f263cd JE	55	const struct nf_conntrack_tuple *orig)
59eecdfb PM	56	{
	57	tuple->src.u.udp.port = orig->dst.u.udp.port;
	58	tuple->dst.u.udp.port = orig->src.u.udp.port;
09f263cd	59	return true;
59eecdfb PM	60	}
	61
	62	/* Print out the per-protocol part of the tuple. */
824f1fbe JP	63	static void udplite_print_tuple(struct seq_file *s,
824f1fbe JP	64	const struct nf_conntrack_tuple *tuple)
59eecdfb	65	{
824f1fbe JP	66	seq_printf(s, "sport=%hu dport=%hu ",
	67	ntohs(tuple->src.u.udp.port),
	68	ntohs(tuple->dst.u.udp.port));
59eecdfb PM	69	}
59eecdfb PM	70
2c8503f5 PNA	71	static unsigned int udplite_get_timeouts(struct net net)
2c8503f5 PNA	72	{
a8021fed	73	return udplite_pernet(net)->timeouts;
2c8503f5 PNA	74	}
2c8503f5 PNA	75
59eecdfb	76	/* Returns verdict for packet, and may modify conntracktype */
c88130bc	77	static int udplite_packet(struct nf_conn *ct,
59eecdfb PM	78	const struct sk_buff *skb,
	79	unsigned int dataoff,
	80	enum ip_conntrack_info ctinfo,
76108cea	81	u_int8_t pf,
2c8503f5 PNA	82	unsigned int hooknum,
2c8503f5 PNA	83	unsigned int *timeouts)
59eecdfb PM	84	{
	85	/* If we've seen traffic both ways, this is some kind of UDP
	86	stream. Extend timeout. */
c88130bc PM	87	if (test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) {
c88130bc PM	88	nf_ct_refresh_acct(ct, ctinfo, skb,
2c8503f5	89	timeouts[UDPLITE_CT_REPLIED]);
59eecdfb	90	/* Also, more likely to be important, and not a probe */
c88130bc	91	if (!test_and_set_bit(IPS_ASSURED_BIT, &ct->status))
858b3133	92	nf_conntrack_event_cache(IPCT_ASSURED, ct);
5a41db94 PNA	93	} else {
5a41db94 PNA	94	nf_ct_refresh_acct(ct, ctinfo, skb,
2c8503f5	95	timeouts[UDPLITE_CT_UNREPLIED]);
5a41db94	96	}
59eecdfb PM	97	return NF_ACCEPT;
	98	}
	99
	100	/* Called when a new connection for this protocol found. */
09f263cd	101	static bool udplite_new(struct nf_conn ct, const struct sk_buff skb,
2c8503f5	102	unsigned int dataoff, unsigned int *timeouts)
59eecdfb	103	{
09f263cd	104	return true;
59eecdfb PM	105	}
59eecdfb PM	106
8fea97ec	107	static int udplite_error(struct net net, struct nf_conn tmpl,
74c51a14 AD	108	struct sk_buff *skb,
74c51a14 AD	109	unsigned int dataoff,
59eecdfb	110	enum ip_conntrack_info *ctinfo,
76108cea	111	u_int8_t pf,
59eecdfb PM	112	unsigned int hooknum)
	113	{
	114	unsigned int udplen = skb->len - dataoff;
da3f13c9 JE	115	const struct udphdr *hdr;
da3f13c9 JE	116	struct udphdr _hdr;
59eecdfb PM	117	unsigned int cscov;
	118
	119	/* Header is too small? */
	120	hdr = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
	121	if (hdr == NULL) {
c2a2c7e0	122	if (LOG_INVALID(net, IPPROTO_UDPLITE))
30e0c6a6	123	nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
59eecdfb PM	124	"nf_ct_udplite: short packet ");
	125	return -NF_ACCEPT;
	126	}
	127
	128	cscov = ntohs(hdr->len);
	129	if (cscov == 0)
	130	cscov = udplen;
	131	else if (cscov < sizeof(*hdr) \|\| cscov > udplen) {
c2a2c7e0	132	if (LOG_INVALID(net, IPPROTO_UDPLITE))
30e0c6a6	133	nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
59eecdfb PM	134	"nf_ct_udplite: invalid checksum coverage ");
	135	return -NF_ACCEPT;
	136	}
	137
	138	/* UDPLITE mandates checksums */
	139	if (!hdr->check) {
c2a2c7e0	140	if (LOG_INVALID(net, IPPROTO_UDPLITE))
30e0c6a6	141	nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
59eecdfb PM	142	"nf_ct_udplite: checksum missing ");
	143	return -NF_ACCEPT;
	144	}
	145
	146	/* Checksum invalid? Ignore. */
c04d0552	147	if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
d63a6507 PM	148	nf_checksum_partial(skb, hooknum, dataoff, cscov, IPPROTO_UDP,
d63a6507 PM	149	pf)) {
c2a2c7e0	150	if (LOG_INVALID(net, IPPROTO_UDPLITE))
30e0c6a6	151	nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
d63a6507 PM	152	"nf_ct_udplite: bad UDPLite checksum ");
d63a6507 PM	153	return -NF_ACCEPT;
59eecdfb PM	154	}
	155
	156	return NF_ACCEPT;
	157	}
	158
50978462 PNA	159	#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	160
	161	#include <linux/netfilter/nfnetlink.h>
	162	#include <linux/netfilter/nfnetlink_cttimeout.h>
	163
8264deb8 G	164	static int udplite_timeout_nlattr_to_obj(struct nlattr *tb[],
8264deb8 G	165	struct net net, void data)
50978462 PNA	166	{
50978462 PNA	167	unsigned int *timeouts = data;
9b91c96c	168	struct nf_udplite_net *un = udplite_pernet(net);
50978462 PNA	169
50978462 PNA	170	/* set default timeouts for UDPlite. */
8264deb8 G	171	timeouts[UDPLITE_CT_UNREPLIED] = un->timeouts[UDPLITE_CT_UNREPLIED];
8264deb8 G	172	timeouts[UDPLITE_CT_REPLIED] = un->timeouts[UDPLITE_CT_REPLIED];
50978462 PNA	173
	174	if (tb[CTA_TIMEOUT_UDPLITE_UNREPLIED]) {
	175	timeouts[UDPLITE_CT_UNREPLIED] =
	176	ntohl(nla_get_be32(tb[CTA_TIMEOUT_UDPLITE_UNREPLIED])) * HZ;
	177	}
	178	if (tb[CTA_TIMEOUT_UDPLITE_REPLIED]) {
	179	timeouts[UDPLITE_CT_REPLIED] =
	180	ntohl(nla_get_be32(tb[CTA_TIMEOUT_UDPLITE_REPLIED])) * HZ;
	181	}
	182	return 0;
	183	}
	184
	185	static int
	186	udplite_timeout_obj_to_nlattr(struct sk_buff skb, const void data)
	187	{
	188	const unsigned int *timeouts = data;
	189
3c60a17b DM	190	if (nla_put_be32(skb, CTA_TIMEOUT_UDPLITE_UNREPLIED,
	191	htonl(timeouts[UDPLITE_CT_UNREPLIED] / HZ)) \|\|
	192	nla_put_be32(skb, CTA_TIMEOUT_UDPLITE_REPLIED,
	193	htonl(timeouts[UDPLITE_CT_REPLIED] / HZ)))
	194	goto nla_put_failure;
50978462 PNA	195	return 0;
	196
	197	nla_put_failure:
	198	return -ENOSPC;
	199	}
	200
	201	static const struct nla_policy
	202	udplite_timeout_nla_policy[CTA_TIMEOUT_UDPLITE_MAX+1] = {
	203	[CTA_TIMEOUT_UDPLITE_UNREPLIED] = { .type = NLA_U32 },
	204	[CTA_TIMEOUT_UDPLITE_REPLIED] = { .type = NLA_U32 },
	205	};
	206	#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
	207
59eecdfb	208	#ifdef CONFIG_SYSCTL
59eecdfb PM	209	static struct ctl_table udplite_sysctl_table[] = {
59eecdfb PM	210	{
59eecdfb	211	.procname = "nf_conntrack_udplite_timeout",
59eecdfb PM	212	.maxlen = sizeof(unsigned int),
59eecdfb PM	213	.mode = 0644,
6d9f239a	214	.proc_handler = proc_dointvec_jiffies,
59eecdfb PM	215	},
59eecdfb PM	216	{
59eecdfb	217	.procname = "nf_conntrack_udplite_timeout_stream",
59eecdfb PM	218	.maxlen = sizeof(unsigned int),
59eecdfb PM	219	.mode = 0644,
6d9f239a	220	.proc_handler = proc_dointvec_jiffies,
59eecdfb	221	},
f8572d8f	222	{ }
59eecdfb PM	223	};
	224	#endif /* CONFIG_SYSCTL */
	225
51b4c824	226	static int udplite_kmemdup_sysctl_table(struct nf_proto_net *pn,
9b91c96c	227	struct nf_udplite_net *un)
a8021fed	228	{
a8021fed	229	#ifdef CONFIG_SYSCTL
51b4c824 G	230	if (pn->ctl_table)
	231	return 0;
	232
	233	pn->ctl_table = kmemdup(udplite_sysctl_table,
	234	sizeof(udplite_sysctl_table),
	235	GFP_KERNEL);
	236	if (!pn->ctl_table)
	237	return -ENOMEM;
	238
	239	pn->ctl_table[0].data = &un->timeouts[UDPLITE_CT_UNREPLIED];
	240	pn->ctl_table[1].data = &un->timeouts[UDPLITE_CT_REPLIED];
a8021fed	241	#endif
51b4c824 G	242	return 0;
	243	}
	244
	245	static int udplite_init_net(struct net *net, u_int16_t proto)
	246	{
9b91c96c	247	struct nf_udplite_net *un = udplite_pernet(net);
51b4c824 G	248	struct nf_proto_net *pn = &un->pn;
	249
	250	if (!pn->users) {
	251	int i;
	252
a8021fed G	253	for (i = 0 ; i < UDPLITE_CT_MAX; i++)
a8021fed G	254	un->timeouts[i] = udplite_timeouts[i];
a8021fed	255	}
51b4c824 G	256
51b4c824 G	257	return udplite_kmemdup_sysctl_table(pn, un);
a8021fed G	258	}
a8021fed G	259
9b91c96c	260	struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite4 __read_mostly =
59eecdfb PM	261	{
	262	.l3proto = PF_INET,
	263	.l4proto = IPPROTO_UDPLITE,
	264	.name = "udplite",
71d8c47f	265	.allow_clash = true,
59eecdfb PM	266	.pkt_to_tuple = udplite_pkt_to_tuple,
	267	.invert_tuple = udplite_invert_tuple,
	268	.print_tuple = udplite_print_tuple,
59eecdfb	269	.packet = udplite_packet,
2c8503f5	270	.get_timeouts = udplite_get_timeouts,
59eecdfb PM	271	.new = udplite_new,
59eecdfb PM	272	.error = udplite_error,
c0cd1156	273	#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
fdf70832	274	.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
a400c30e	275	.nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
fdf70832	276	.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
f73e924c	277	.nla_policy = nf_ct_port_nla_policy,
59eecdfb	278	#endif
50978462 PNA	279	#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	280	.ctnl_timeout = {
	281	.nlattr_to_obj = udplite_timeout_nlattr_to_obj,
	282	.obj_to_nlattr = udplite_timeout_obj_to_nlattr,
	283	.nlattr_max = CTA_TIMEOUT_UDPLITE_MAX,
	284	.obj_size = sizeof(unsigned int) *
	285	CTA_TIMEOUT_UDPLITE_MAX,
	286	.nla_policy = udplite_timeout_nla_policy,
	287	},
	288	#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
a8021fed	289	.init_net = udplite_init_net,
59eecdfb	290	};
9b91c96c	291	EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udplite4);
59eecdfb	292
9b91c96c	293	struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite6 __read_mostly =
59eecdfb PM	294	{
	295	.l3proto = PF_INET6,
	296	.l4proto = IPPROTO_UDPLITE,
	297	.name = "udplite",
71d8c47f	298	.allow_clash = true,
59eecdfb PM	299	.pkt_to_tuple = udplite_pkt_to_tuple,
	300	.invert_tuple = udplite_invert_tuple,
	301	.print_tuple = udplite_print_tuple,
59eecdfb	302	.packet = udplite_packet,
2c8503f5	303	.get_timeouts = udplite_get_timeouts,
59eecdfb PM	304	.new = udplite_new,
59eecdfb PM	305	.error = udplite_error,
c0cd1156	306	#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
fdf70832	307	.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
5ff48294	308	.nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
fdf70832	309	.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
f73e924c	310	.nla_policy = nf_ct_port_nla_policy,
59eecdfb	311	#endif
50978462 PNA	312	#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	313	.ctnl_timeout = {
	314	.nlattr_to_obj = udplite_timeout_nlattr_to_obj,
	315	.obj_to_nlattr = udplite_timeout_obj_to_nlattr,
	316	.nlattr_max = CTA_TIMEOUT_UDPLITE_MAX,
	317	.obj_size = sizeof(unsigned int) *
	318	CTA_TIMEOUT_UDPLITE_MAX,
	319	.nla_policy = udplite_timeout_nla_policy,
	320	},
	321	#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
a8021fed	322	.init_net = udplite_init_net,
59eecdfb	323	};
9b91c96c	324	EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udplite6);