[GitHub/mt8127/android_kernel_alcatel_ttab.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/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>

enum udplite_conntrack {
	UDPLITE_CT_UNREPLIED,
	UDPLITE_CT_REPLIED,
	UDPLITE_CT_MAX
};

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

static int udplite_net_id __read_mostly;
struct udplite_net {
	struct nf_proto_net pn;
	unsigned int timeouts[UDPLITE_CT_MAX];
};

static inline struct udplite_net *udplite_pernet(struct net *net)
{
	return net_generic(net, udplite_net_id);
}

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

	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 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 int udplite_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 *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 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 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 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);
}

static struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite4 __read_mostly =
{
	.l3proto		= PF_INET,
	.l4proto		= IPPROTO_UDPLITE,
	.name			= "udplite",
	.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 */
	.net_id			= &udplite_net_id,
	.init_net		= udplite_init_net,
};

static struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite6 __read_mostly =
{
	.l3proto		= PF_INET6,
	.l4proto		= IPPROTO_UDPLITE,
	.name			= "udplite",
	.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 */
	.net_id			= &udplite_net_id,
	.init_net		= udplite_init_net,
};

static int udplite_net_init(struct net *net)
{
	int ret = 0;

	ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_udplite4);
	if (ret < 0) {
		pr_err("nf_conntrack_udplite4: pernet registration failed.\n");
		goto out;
	}
	ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_udplite6);
	if (ret < 0) {
		pr_err("nf_conntrack_udplite6: pernet registration failed.\n");
		goto cleanup_udplite4;
	}
	return 0;

cleanup_udplite4:
	nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udplite4);
out:
	return ret;
}

static void udplite_net_exit(struct net *net)
{
	nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udplite6);
	nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udplite4);
}

static struct pernet_operations udplite_net_ops = {
	.init = udplite_net_init,
	.exit = udplite_net_exit,
	.id   = &udplite_net_id,
	.size = sizeof(struct udplite_net),
};

static int __init nf_conntrack_proto_udplite_init(void)
{
	int ret;

	ret = register_pernet_subsys(&udplite_net_ops);
	if (ret < 0)
		goto out_pernet;

	ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_udplite4);
	if (ret < 0)
		goto out_udplite4;

	ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_udplite6);
	if (ret < 0)
		goto out_udplite6;

	return 0;
out_udplite6:
	nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udplite4);
out_udplite4:
	unregister_pernet_subsys(&udplite_net_ops);
out_pernet:
	return ret;
}

static void __exit nf_conntrack_proto_udplite_exit(void)
{
	nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udplite6);
	nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udplite4);
	unregister_pernet_subsys(&udplite_net_ops);
}

module_init(nf_conntrack_proto_udplite_init);
module_exit(nf_conntrack_proto_udplite_exit);

MODULE_LICENSE("GPL");
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>
	12	#include <linux/module.h>
59eecdfb PM	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>
	19
	20	#include <linux/netfilter.h>
	21	#include <linux/netfilter_ipv4.h>
	22	#include <linux/netfilter_ipv6.h>
	23	#include <net/netfilter/nf_conntrack_l4proto.h>
	24	#include <net/netfilter/nf_conntrack_ecache.h>
f01ffbd6	25	#include <net/netfilter/nf_log.h>
59eecdfb	26
5a41db94 PNA	27	enum udplite_conntrack {
	28	UDPLITE_CT_UNREPLIED,
	29	UDPLITE_CT_REPLIED,
	30	UDPLITE_CT_MAX
	31	};
	32
	33	static unsigned int udplite_timeouts[UDPLITE_CT_MAX] = {
	34	[UDPLITE_CT_UNREPLIED] = 30*HZ,
	35	[UDPLITE_CT_REPLIED] = 180*HZ,
	36	};
59eecdfb	37
a8021fed G	38	static int udplite_net_id __read_mostly;
	39	struct udplite_net {
	40	struct nf_proto_net pn;
	41	unsigned int timeouts[UDPLITE_CT_MAX];
	42	};
	43
	44	static inline struct udplite_net udplite_pernet(struct net net)
	45	{
	46	return net_generic(net, udplite_net_id);
	47	}
	48
09f263cd JE	49	static bool udplite_pkt_to_tuple(const struct sk_buff *skb,
	50	unsigned int dataoff,
	51	struct nf_conntrack_tuple *tuple)
59eecdfb	52	{
da3f13c9 JE	53	const struct udphdr *hp;
da3f13c9 JE	54	struct udphdr _hdr;
59eecdfb PM	55
	56	hp = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
	57	if (hp == NULL)
09f263cd	58	return false;
59eecdfb PM	59
	60	tuple->src.u.udp.port = hp->source;
	61	tuple->dst.u.udp.port = hp->dest;
09f263cd	62	return true;
59eecdfb PM	63	}
59eecdfb PM	64
09f263cd JE	65	static bool udplite_invert_tuple(struct nf_conntrack_tuple *tuple,
09f263cd JE	66	const struct nf_conntrack_tuple *orig)
59eecdfb PM	67	{
	68	tuple->src.u.udp.port = orig->dst.u.udp.port;
	69	tuple->dst.u.udp.port = orig->src.u.udp.port;
09f263cd	70	return true;
59eecdfb PM	71	}
	72
	73	/* Print out the per-protocol part of the tuple. */
	74	static int udplite_print_tuple(struct seq_file *s,
	75	const struct nf_conntrack_tuple *tuple)
	76	{
	77	return seq_printf(s, "sport=%hu dport=%hu ",
	78	ntohs(tuple->src.u.udp.port),
	79	ntohs(tuple->dst.u.udp.port));
	80	}
	81
2c8503f5 PNA	82	static unsigned int udplite_get_timeouts(struct net net)
2c8503f5 PNA	83	{
a8021fed	84	return udplite_pernet(net)->timeouts;
2c8503f5 PNA	85	}
2c8503f5 PNA	86
59eecdfb	87	/* Returns verdict for packet, and may modify conntracktype */
c88130bc	88	static int udplite_packet(struct nf_conn *ct,
59eecdfb PM	89	const struct sk_buff *skb,
	90	unsigned int dataoff,
	91	enum ip_conntrack_info ctinfo,
76108cea	92	u_int8_t pf,
2c8503f5 PNA	93	unsigned int hooknum,
2c8503f5 PNA	94	unsigned int *timeouts)
59eecdfb PM	95	{
	96	/* If we've seen traffic both ways, this is some kind of UDP
	97	stream. Extend timeout. */
c88130bc PM	98	if (test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) {
c88130bc PM	99	nf_ct_refresh_acct(ct, ctinfo, skb,
2c8503f5	100	timeouts[UDPLITE_CT_REPLIED]);
59eecdfb	101	/* Also, more likely to be important, and not a probe */
c88130bc	102	if (!test_and_set_bit(IPS_ASSURED_BIT, &ct->status))
858b3133	103	nf_conntrack_event_cache(IPCT_ASSURED, ct);
5a41db94 PNA	104	} else {
5a41db94 PNA	105	nf_ct_refresh_acct(ct, ctinfo, skb,
2c8503f5	106	timeouts[UDPLITE_CT_UNREPLIED]);
5a41db94	107	}
59eecdfb PM	108	return NF_ACCEPT;
	109	}
	110
	111	/* Called when a new connection for this protocol found. */
09f263cd	112	static bool udplite_new(struct nf_conn ct, const struct sk_buff skb,
2c8503f5	113	unsigned int dataoff, unsigned int *timeouts)
59eecdfb	114	{
09f263cd	115	return true;
59eecdfb PM	116	}
59eecdfb PM	117
8fea97ec	118	static int udplite_error(struct net net, struct nf_conn tmpl,
74c51a14 AD	119	struct sk_buff *skb,
74c51a14 AD	120	unsigned int dataoff,
59eecdfb	121	enum ip_conntrack_info *ctinfo,
76108cea	122	u_int8_t pf,
59eecdfb PM	123	unsigned int hooknum)
	124	{
	125	unsigned int udplen = skb->len - dataoff;
da3f13c9 JE	126	const struct udphdr *hdr;
da3f13c9 JE	127	struct udphdr _hdr;
59eecdfb PM	128	unsigned int cscov;
	129
	130	/* Header is too small? */
	131	hdr = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
	132	if (hdr == NULL) {
c2a2c7e0	133	if (LOG_INVALID(net, IPPROTO_UDPLITE))
30e0c6a6	134	nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
59eecdfb PM	135	"nf_ct_udplite: short packet ");
	136	return -NF_ACCEPT;
	137	}
	138
	139	cscov = ntohs(hdr->len);
	140	if (cscov == 0)
	141	cscov = udplen;
	142	else if (cscov < sizeof(*hdr) \|\| cscov > udplen) {
c2a2c7e0	143	if (LOG_INVALID(net, IPPROTO_UDPLITE))
30e0c6a6	144	nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
59eecdfb PM	145	"nf_ct_udplite: invalid checksum coverage ");
	146	return -NF_ACCEPT;
	147	}
	148
	149	/* UDPLITE mandates checksums */
	150	if (!hdr->check) {
c2a2c7e0	151	if (LOG_INVALID(net, IPPROTO_UDPLITE))
30e0c6a6	152	nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
59eecdfb PM	153	"nf_ct_udplite: checksum missing ");
	154	return -NF_ACCEPT;
	155	}
	156
	157	/* Checksum invalid? Ignore. */
c04d0552	158	if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
d63a6507 PM	159	nf_checksum_partial(skb, hooknum, dataoff, cscov, IPPROTO_UDP,
d63a6507 PM	160	pf)) {
c2a2c7e0	161	if (LOG_INVALID(net, IPPROTO_UDPLITE))
30e0c6a6	162	nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
d63a6507 PM	163	"nf_ct_udplite: bad UDPLite checksum ");
d63a6507 PM	164	return -NF_ACCEPT;
59eecdfb PM	165	}
	166
	167	return NF_ACCEPT;
	168	}
	169
50978462 PNA	170	#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	171
	172	#include <linux/netfilter/nfnetlink.h>
	173	#include <linux/netfilter/nfnetlink_cttimeout.h>
	174
8264deb8 G	175	static int udplite_timeout_nlattr_to_obj(struct nlattr *tb[],
8264deb8 G	176	struct net net, void data)
50978462 PNA	177	{
50978462 PNA	178	unsigned int *timeouts = data;
8264deb8	179	struct udplite_net *un = udplite_pernet(net);
50978462 PNA	180
50978462 PNA	181	/* set default timeouts for UDPlite. */
8264deb8 G	182	timeouts[UDPLITE_CT_UNREPLIED] = un->timeouts[UDPLITE_CT_UNREPLIED];
8264deb8 G	183	timeouts[UDPLITE_CT_REPLIED] = un->timeouts[UDPLITE_CT_REPLIED];
50978462 PNA	184
	185	if (tb[CTA_TIMEOUT_UDPLITE_UNREPLIED]) {
	186	timeouts[UDPLITE_CT_UNREPLIED] =
	187	ntohl(nla_get_be32(tb[CTA_TIMEOUT_UDPLITE_UNREPLIED])) * HZ;
	188	}
	189	if (tb[CTA_TIMEOUT_UDPLITE_REPLIED]) {
	190	timeouts[UDPLITE_CT_REPLIED] =
	191	ntohl(nla_get_be32(tb[CTA_TIMEOUT_UDPLITE_REPLIED])) * HZ;
	192	}
	193	return 0;
	194	}
	195
	196	static int
	197	udplite_timeout_obj_to_nlattr(struct sk_buff skb, const void data)
	198	{
	199	const unsigned int *timeouts = data;
	200
3c60a17b DM	201	if (nla_put_be32(skb, CTA_TIMEOUT_UDPLITE_UNREPLIED,
	202	htonl(timeouts[UDPLITE_CT_UNREPLIED] / HZ)) \|\|
	203	nla_put_be32(skb, CTA_TIMEOUT_UDPLITE_REPLIED,
	204	htonl(timeouts[UDPLITE_CT_REPLIED] / HZ)))
	205	goto nla_put_failure;
50978462 PNA	206	return 0;
	207
	208	nla_put_failure:
	209	return -ENOSPC;
	210	}
	211
	212	static const struct nla_policy
	213	udplite_timeout_nla_policy[CTA_TIMEOUT_UDPLITE_MAX+1] = {
	214	[CTA_TIMEOUT_UDPLITE_UNREPLIED] = { .type = NLA_U32 },
	215	[CTA_TIMEOUT_UDPLITE_REPLIED] = { .type = NLA_U32 },
	216	};
	217	#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
	218
59eecdfb	219	#ifdef CONFIG_SYSCTL
59eecdfb PM	220	static struct ctl_table udplite_sysctl_table[] = {
59eecdfb PM	221	{
59eecdfb	222	.procname = "nf_conntrack_udplite_timeout",
59eecdfb PM	223	.maxlen = sizeof(unsigned int),
59eecdfb PM	224	.mode = 0644,
6d9f239a	225	.proc_handler = proc_dointvec_jiffies,
59eecdfb PM	226	},
59eecdfb PM	227	{
59eecdfb	228	.procname = "nf_conntrack_udplite_timeout_stream",
59eecdfb PM	229	.maxlen = sizeof(unsigned int),
59eecdfb PM	230	.mode = 0644,
6d9f239a	231	.proc_handler = proc_dointvec_jiffies,
59eecdfb	232	},
f8572d8f	233	{ }
59eecdfb PM	234	};
	235	#endif /* CONFIG_SYSCTL */
	236
51b4c824 G	237	static int udplite_kmemdup_sysctl_table(struct nf_proto_net *pn,
51b4c824 G	238	struct udplite_net *un)
a8021fed	239	{
a8021fed	240	#ifdef CONFIG_SYSCTL
51b4c824 G	241	if (pn->ctl_table)
	242	return 0;
	243
	244	pn->ctl_table = kmemdup(udplite_sysctl_table,
	245	sizeof(udplite_sysctl_table),
	246	GFP_KERNEL);
	247	if (!pn->ctl_table)
	248	return -ENOMEM;
	249
	250	pn->ctl_table[0].data = &un->timeouts[UDPLITE_CT_UNREPLIED];
	251	pn->ctl_table[1].data = &un->timeouts[UDPLITE_CT_REPLIED];
a8021fed	252	#endif
51b4c824 G	253	return 0;
	254	}
	255
	256	static int udplite_init_net(struct net *net, u_int16_t proto)
	257	{
	258	struct udplite_net *un = udplite_pernet(net);
	259	struct nf_proto_net *pn = &un->pn;
	260
	261	if (!pn->users) {
	262	int i;
	263
a8021fed G	264	for (i = 0 ; i < UDPLITE_CT_MAX; i++)
a8021fed G	265	un->timeouts[i] = udplite_timeouts[i];
a8021fed	266	}
51b4c824 G	267
51b4c824 G	268	return udplite_kmemdup_sysctl_table(pn, un);
a8021fed G	269	}
a8021fed G	270
59eecdfb PM	271	static struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite4 __read_mostly =
	272	{
	273	.l3proto = PF_INET,
	274	.l4proto = IPPROTO_UDPLITE,
	275	.name = "udplite",
	276	.pkt_to_tuple = udplite_pkt_to_tuple,
	277	.invert_tuple = udplite_invert_tuple,
	278	.print_tuple = udplite_print_tuple,
59eecdfb	279	.packet = udplite_packet,
2c8503f5	280	.get_timeouts = udplite_get_timeouts,
59eecdfb PM	281	.new = udplite_new,
59eecdfb PM	282	.error = udplite_error,
c0cd1156	283	#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
fdf70832	284	.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
a400c30e	285	.nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
fdf70832	286	.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
f73e924c	287	.nla_policy = nf_ct_port_nla_policy,
59eecdfb	288	#endif
50978462 PNA	289	#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	290	.ctnl_timeout = {
	291	.nlattr_to_obj = udplite_timeout_nlattr_to_obj,
	292	.obj_to_nlattr = udplite_timeout_obj_to_nlattr,
	293	.nlattr_max = CTA_TIMEOUT_UDPLITE_MAX,
	294	.obj_size = sizeof(unsigned int) *
	295	CTA_TIMEOUT_UDPLITE_MAX,
	296	.nla_policy = udplite_timeout_nla_policy,
	297	},
	298	#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
a8021fed G	299	.net_id = &udplite_net_id,
a8021fed G	300	.init_net = udplite_init_net,
59eecdfb PM	301	};
	302
	303	static struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite6 __read_mostly =
	304	{
	305	.l3proto = PF_INET6,
	306	.l4proto = IPPROTO_UDPLITE,
	307	.name = "udplite",
	308	.pkt_to_tuple = udplite_pkt_to_tuple,
	309	.invert_tuple = udplite_invert_tuple,
	310	.print_tuple = udplite_print_tuple,
59eecdfb	311	.packet = udplite_packet,
2c8503f5	312	.get_timeouts = udplite_get_timeouts,
59eecdfb PM	313	.new = udplite_new,
59eecdfb PM	314	.error = udplite_error,
c0cd1156	315	#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
fdf70832	316	.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
5ff48294	317	.nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
fdf70832	318	.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
f73e924c	319	.nla_policy = nf_ct_port_nla_policy,
59eecdfb	320	#endif
50978462 PNA	321	#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	322	.ctnl_timeout = {
	323	.nlattr_to_obj = udplite_timeout_nlattr_to_obj,
	324	.obj_to_nlattr = udplite_timeout_obj_to_nlattr,
	325	.nlattr_max = CTA_TIMEOUT_UDPLITE_MAX,
	326	.obj_size = sizeof(unsigned int) *
	327	CTA_TIMEOUT_UDPLITE_MAX,
	328	.nla_policy = udplite_timeout_nla_policy,
	329	},
	330	#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
a8021fed G	331	.net_id = &udplite_net_id,
a8021fed G	332	.init_net = udplite_init_net,
59eecdfb PM	333	};
59eecdfb PM	334
a8021fed	335	static int udplite_net_init(struct net *net)
59eecdfb	336	{
a8021fed G	337	int ret = 0;
a8021fed G	338
c296bb4d	339	ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_udplite4);
a8021fed	340	if (ret < 0) {
c296bb4d	341	pr_err("nf_conntrack_udplite4: pernet registration failed.\n");
a8021fed G	342	goto out;
a8021fed G	343	}
c296bb4d	344	ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_udplite6);
a8021fed	345	if (ret < 0) {
c296bb4d	346	pr_err("nf_conntrack_udplite6: pernet registration failed.\n");
a8021fed G	347	goto cleanup_udplite4;
a8021fed G	348	}
59eecdfb	349	return 0;
a8021fed G	350
a8021fed G	351	cleanup_udplite4:
c296bb4d	352	nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udplite4);
a8021fed G	353	out:
	354	return ret;
	355	}
	356
	357	static void udplite_net_exit(struct net *net)
	358	{
c296bb4d G	359	nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udplite6);
c296bb4d G	360	nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udplite4);
a8021fed G	361	}
	362
	363	static struct pernet_operations udplite_net_ops = {
	364	.init = udplite_net_init,
	365	.exit = udplite_net_exit,
	366	.id = &udplite_net_id,
	367	.size = sizeof(struct udplite_net),
	368	};
	369
	370	static int __init nf_conntrack_proto_udplite_init(void)
	371	{
c296bb4d G	372	int ret;
c296bb4d G	373
0d98da5d G	374	ret = register_pernet_subsys(&udplite_net_ops);
	375	if (ret < 0)
	376	goto out_pernet;
	377
c296bb4d G	378	ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_udplite4);
	379	if (ret < 0)
	380	goto out_udplite4;
	381
	382	ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_udplite6);
	383	if (ret < 0)
	384	goto out_udplite6;
	385
c296bb4d	386	return 0;
c296bb4d G	387	out_udplite6:
	388	nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udplite4);
	389	out_udplite4:
0d98da5d G	390	unregister_pernet_subsys(&udplite_net_ops);
0d98da5d G	391	out_pernet:
c296bb4d	392	return ret;
59eecdfb PM	393	}
	394
	395	static void __exit nf_conntrack_proto_udplite_exit(void)
	396	{
c296bb4d G	397	nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udplite6);
c296bb4d G	398	nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udplite4);
a8021fed	399	unregister_pernet_subsys(&udplite_net_ops);
59eecdfb PM	400	}
	401
	402	module_init(nf_conntrack_proto_udplite_init);
	403	module_exit(nf_conntrack_proto_udplite_exit);
	404
	405	MODULE_LICENSE("GPL");