[deliverable/linux.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 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 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",
	.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 */
	.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",
	.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 */
	.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,
09f263cd JE	50	unsigned int dataoff,
a31f1adc	51	struct net *net,
09f263cd	52	struct nf_conntrack_tuple *tuple)
59eecdfb	53	{
da3f13c9 JE	54	const struct udphdr *hp;
da3f13c9 JE	55	struct udphdr _hdr;
59eecdfb	56
e5e693ab GF	57	/* Actually only need first 4 bytes to get ports. */
e5e693ab GF	58	hp = skb_header_pointer(skb, dataoff, 4, &_hdr);
59eecdfb	59	if (hp == NULL)
09f263cd	60	return false;
59eecdfb PM	61
	62	tuple->src.u.udp.port = hp->source;
	63	tuple->dst.u.udp.port = hp->dest;
09f263cd	64	return true;
59eecdfb PM	65	}
59eecdfb PM	66
09f263cd JE	67	static bool udplite_invert_tuple(struct nf_conntrack_tuple *tuple,
09f263cd JE	68	const struct nf_conntrack_tuple *orig)
59eecdfb PM	69	{
	70	tuple->src.u.udp.port = orig->dst.u.udp.port;
	71	tuple->dst.u.udp.port = orig->src.u.udp.port;
09f263cd	72	return true;
59eecdfb PM	73	}
	74
	75	/* Print out the per-protocol part of the tuple. */
824f1fbe JP	76	static void udplite_print_tuple(struct seq_file *s,
824f1fbe JP	77	const struct nf_conntrack_tuple *tuple)
59eecdfb	78	{
824f1fbe JP	79	seq_printf(s, "sport=%hu dport=%hu ",
	80	ntohs(tuple->src.u.udp.port),
	81	ntohs(tuple->dst.u.udp.port));
59eecdfb PM	82	}
59eecdfb PM	83
2c8503f5 PNA	84	static unsigned int udplite_get_timeouts(struct net net)
2c8503f5 PNA	85	{
a8021fed	86	return udplite_pernet(net)->timeouts;
2c8503f5 PNA	87	}
2c8503f5 PNA	88
59eecdfb	89	/* Returns verdict for packet, and may modify conntracktype */
c88130bc	90	static int udplite_packet(struct nf_conn *ct,
59eecdfb PM	91	const struct sk_buff *skb,
	92	unsigned int dataoff,
	93	enum ip_conntrack_info ctinfo,
76108cea	94	u_int8_t pf,
2c8503f5 PNA	95	unsigned int hooknum,
2c8503f5 PNA	96	unsigned int *timeouts)
59eecdfb PM	97	{
	98	/* If we've seen traffic both ways, this is some kind of UDP
	99	stream. Extend timeout. */
c88130bc PM	100	if (test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) {
c88130bc PM	101	nf_ct_refresh_acct(ct, ctinfo, skb,
2c8503f5	102	timeouts[UDPLITE_CT_REPLIED]);
59eecdfb	103	/* Also, more likely to be important, and not a probe */
c88130bc	104	if (!test_and_set_bit(IPS_ASSURED_BIT, &ct->status))
858b3133	105	nf_conntrack_event_cache(IPCT_ASSURED, ct);
5a41db94 PNA	106	} else {
5a41db94 PNA	107	nf_ct_refresh_acct(ct, ctinfo, skb,
2c8503f5	108	timeouts[UDPLITE_CT_UNREPLIED]);
5a41db94	109	}
59eecdfb PM	110	return NF_ACCEPT;
	111	}
	112
	113	/* Called when a new connection for this protocol found. */
09f263cd	114	static bool udplite_new(struct nf_conn ct, const struct sk_buff skb,
2c8503f5	115	unsigned int dataoff, unsigned int *timeouts)
59eecdfb	116	{
09f263cd	117	return true;
59eecdfb PM	118	}
59eecdfb PM	119
8fea97ec	120	static int udplite_error(struct net net, struct nf_conn tmpl,
74c51a14 AD	121	struct sk_buff *skb,
74c51a14 AD	122	unsigned int dataoff,
59eecdfb	123	enum ip_conntrack_info *ctinfo,
76108cea	124	u_int8_t pf,
59eecdfb PM	125	unsigned int hooknum)
	126	{
	127	unsigned int udplen = skb->len - dataoff;
da3f13c9 JE	128	const struct udphdr *hdr;
da3f13c9 JE	129	struct udphdr _hdr;
59eecdfb PM	130	unsigned int cscov;
	131
	132	/* Header is too small? */
	133	hdr = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
	134	if (hdr == NULL) {
c2a2c7e0	135	if (LOG_INVALID(net, IPPROTO_UDPLITE))
30e0c6a6	136	nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
59eecdfb PM	137	"nf_ct_udplite: short packet ");
	138	return -NF_ACCEPT;
	139	}
	140
	141	cscov = ntohs(hdr->len);
	142	if (cscov == 0)
	143	cscov = udplen;
	144	else if (cscov < sizeof(*hdr) \|\| cscov > udplen) {
c2a2c7e0	145	if (LOG_INVALID(net, IPPROTO_UDPLITE))
30e0c6a6	146	nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
59eecdfb PM	147	"nf_ct_udplite: invalid checksum coverage ");
	148	return -NF_ACCEPT;
	149	}
	150
	151	/* UDPLITE mandates checksums */
	152	if (!hdr->check) {
c2a2c7e0	153	if (LOG_INVALID(net, IPPROTO_UDPLITE))
30e0c6a6	154	nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
59eecdfb PM	155	"nf_ct_udplite: checksum missing ");
	156	return -NF_ACCEPT;
	157	}
	158
	159	/* Checksum invalid? Ignore. */
c04d0552	160	if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
d63a6507 PM	161	nf_checksum_partial(skb, hooknum, dataoff, cscov, IPPROTO_UDP,
d63a6507 PM	162	pf)) {
c2a2c7e0	163	if (LOG_INVALID(net, IPPROTO_UDPLITE))
30e0c6a6	164	nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
d63a6507 PM	165	"nf_ct_udplite: bad UDPLite checksum ");
d63a6507 PM	166	return -NF_ACCEPT;
59eecdfb PM	167	}
	168
	169	return NF_ACCEPT;
	170	}
	171
50978462 PNA	172	#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	173
	174	#include <linux/netfilter/nfnetlink.h>
	175	#include <linux/netfilter/nfnetlink_cttimeout.h>
	176
8264deb8 G	177	static int udplite_timeout_nlattr_to_obj(struct nlattr *tb[],
8264deb8 G	178	struct net net, void data)
50978462 PNA	179	{
50978462 PNA	180	unsigned int *timeouts = data;
8264deb8	181	struct udplite_net *un = udplite_pernet(net);
50978462 PNA	182
50978462 PNA	183	/* set default timeouts for UDPlite. */
8264deb8 G	184	timeouts[UDPLITE_CT_UNREPLIED] = un->timeouts[UDPLITE_CT_UNREPLIED];
8264deb8 G	185	timeouts[UDPLITE_CT_REPLIED] = un->timeouts[UDPLITE_CT_REPLIED];
50978462 PNA	186
	187	if (tb[CTA_TIMEOUT_UDPLITE_UNREPLIED]) {
	188	timeouts[UDPLITE_CT_UNREPLIED] =
	189	ntohl(nla_get_be32(tb[CTA_TIMEOUT_UDPLITE_UNREPLIED])) * HZ;
	190	}
	191	if (tb[CTA_TIMEOUT_UDPLITE_REPLIED]) {
	192	timeouts[UDPLITE_CT_REPLIED] =
	193	ntohl(nla_get_be32(tb[CTA_TIMEOUT_UDPLITE_REPLIED])) * HZ;
	194	}
	195	return 0;
	196	}
	197
	198	static int
	199	udplite_timeout_obj_to_nlattr(struct sk_buff skb, const void data)
	200	{
	201	const unsigned int *timeouts = data;
	202
3c60a17b DM	203	if (nla_put_be32(skb, CTA_TIMEOUT_UDPLITE_UNREPLIED,
	204	htonl(timeouts[UDPLITE_CT_UNREPLIED] / HZ)) \|\|
	205	nla_put_be32(skb, CTA_TIMEOUT_UDPLITE_REPLIED,
	206	htonl(timeouts[UDPLITE_CT_REPLIED] / HZ)))
	207	goto nla_put_failure;
50978462 PNA	208	return 0;
	209
	210	nla_put_failure:
	211	return -ENOSPC;
	212	}
	213
	214	static const struct nla_policy
	215	udplite_timeout_nla_policy[CTA_TIMEOUT_UDPLITE_MAX+1] = {
	216	[CTA_TIMEOUT_UDPLITE_UNREPLIED] = { .type = NLA_U32 },
	217	[CTA_TIMEOUT_UDPLITE_REPLIED] = { .type = NLA_U32 },
	218	};
	219	#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
	220
59eecdfb	221	#ifdef CONFIG_SYSCTL
59eecdfb PM	222	static struct ctl_table udplite_sysctl_table[] = {
59eecdfb PM	223	{
59eecdfb	224	.procname = "nf_conntrack_udplite_timeout",
59eecdfb PM	225	.maxlen = sizeof(unsigned int),
59eecdfb PM	226	.mode = 0644,
6d9f239a	227	.proc_handler = proc_dointvec_jiffies,
59eecdfb PM	228	},
59eecdfb PM	229	{
59eecdfb	230	.procname = "nf_conntrack_udplite_timeout_stream",
59eecdfb PM	231	.maxlen = sizeof(unsigned int),
59eecdfb PM	232	.mode = 0644,
6d9f239a	233	.proc_handler = proc_dointvec_jiffies,
59eecdfb	234	},
f8572d8f	235	{ }
59eecdfb PM	236	};
	237	#endif /* CONFIG_SYSCTL */
	238
51b4c824 G	239	static int udplite_kmemdup_sysctl_table(struct nf_proto_net *pn,
51b4c824 G	240	struct udplite_net *un)
a8021fed	241	{
a8021fed	242	#ifdef CONFIG_SYSCTL
51b4c824 G	243	if (pn->ctl_table)
	244	return 0;
	245
	246	pn->ctl_table = kmemdup(udplite_sysctl_table,
	247	sizeof(udplite_sysctl_table),
	248	GFP_KERNEL);
	249	if (!pn->ctl_table)
	250	return -ENOMEM;
	251
	252	pn->ctl_table[0].data = &un->timeouts[UDPLITE_CT_UNREPLIED];
	253	pn->ctl_table[1].data = &un->timeouts[UDPLITE_CT_REPLIED];
a8021fed	254	#endif
51b4c824 G	255	return 0;
	256	}
	257
	258	static int udplite_init_net(struct net *net, u_int16_t proto)
	259	{
	260	struct udplite_net *un = udplite_pernet(net);
	261	struct nf_proto_net *pn = &un->pn;
	262
	263	if (!pn->users) {
	264	int i;
	265
a8021fed G	266	for (i = 0 ; i < UDPLITE_CT_MAX; i++)
a8021fed G	267	un->timeouts[i] = udplite_timeouts[i];
a8021fed	268	}
51b4c824 G	269
51b4c824 G	270	return udplite_kmemdup_sysctl_table(pn, un);
a8021fed G	271	}
a8021fed G	272
59eecdfb PM	273	static struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite4 __read_mostly =
	274	{
	275	.l3proto = PF_INET,
	276	.l4proto = IPPROTO_UDPLITE,
	277	.name = "udplite",
71d8c47f	278	.allow_clash = true,
59eecdfb PM	279	.pkt_to_tuple = udplite_pkt_to_tuple,
	280	.invert_tuple = udplite_invert_tuple,
	281	.print_tuple = udplite_print_tuple,
59eecdfb	282	.packet = udplite_packet,
2c8503f5	283	.get_timeouts = udplite_get_timeouts,
59eecdfb PM	284	.new = udplite_new,
59eecdfb PM	285	.error = udplite_error,
c0cd1156	286	#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
fdf70832	287	.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
a400c30e	288	.nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
fdf70832	289	.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
f73e924c	290	.nla_policy = nf_ct_port_nla_policy,
59eecdfb	291	#endif
50978462 PNA	292	#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	293	.ctnl_timeout = {
	294	.nlattr_to_obj = udplite_timeout_nlattr_to_obj,
	295	.obj_to_nlattr = udplite_timeout_obj_to_nlattr,
	296	.nlattr_max = CTA_TIMEOUT_UDPLITE_MAX,
	297	.obj_size = sizeof(unsigned int) *
	298	CTA_TIMEOUT_UDPLITE_MAX,
	299	.nla_policy = udplite_timeout_nla_policy,
	300	},
	301	#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
a8021fed G	302	.net_id = &udplite_net_id,
a8021fed G	303	.init_net = udplite_init_net,
59eecdfb PM	304	};
	305
	306	static struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite6 __read_mostly =
	307	{
	308	.l3proto = PF_INET6,
	309	.l4proto = IPPROTO_UDPLITE,
	310	.name = "udplite",
71d8c47f	311	.allow_clash = true,
59eecdfb PM	312	.pkt_to_tuple = udplite_pkt_to_tuple,
	313	.invert_tuple = udplite_invert_tuple,
	314	.print_tuple = udplite_print_tuple,
59eecdfb	315	.packet = udplite_packet,
2c8503f5	316	.get_timeouts = udplite_get_timeouts,
59eecdfb PM	317	.new = udplite_new,
59eecdfb PM	318	.error = udplite_error,
c0cd1156	319	#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
fdf70832	320	.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
5ff48294	321	.nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
fdf70832	322	.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
f73e924c	323	.nla_policy = nf_ct_port_nla_policy,
59eecdfb	324	#endif
50978462 PNA	325	#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	326	.ctnl_timeout = {
	327	.nlattr_to_obj = udplite_timeout_nlattr_to_obj,
	328	.obj_to_nlattr = udplite_timeout_obj_to_nlattr,
	329	.nlattr_max = CTA_TIMEOUT_UDPLITE_MAX,
	330	.obj_size = sizeof(unsigned int) *
	331	CTA_TIMEOUT_UDPLITE_MAX,
	332	.nla_policy = udplite_timeout_nla_policy,
	333	},
	334	#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
a8021fed G	335	.net_id = &udplite_net_id,
a8021fed G	336	.init_net = udplite_init_net,
59eecdfb PM	337	};
59eecdfb PM	338
a8021fed	339	static int udplite_net_init(struct net *net)
59eecdfb	340	{
a8021fed G	341	int ret = 0;
a8021fed G	342
c296bb4d	343	ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_udplite4);
a8021fed	344	if (ret < 0) {
c296bb4d	345	pr_err("nf_conntrack_udplite4: pernet registration failed.\n");
a8021fed G	346	goto out;
a8021fed G	347	}
c296bb4d	348	ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_udplite6);
a8021fed	349	if (ret < 0) {
c296bb4d	350	pr_err("nf_conntrack_udplite6: pernet registration failed.\n");
a8021fed G	351	goto cleanup_udplite4;
a8021fed G	352	}
59eecdfb	353	return 0;
a8021fed G	354
a8021fed G	355	cleanup_udplite4:
c296bb4d	356	nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udplite4);
a8021fed G	357	out:
	358	return ret;
	359	}
	360
	361	static void udplite_net_exit(struct net *net)
	362	{
c296bb4d G	363	nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udplite6);
c296bb4d G	364	nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udplite4);
a8021fed G	365	}
	366
	367	static struct pernet_operations udplite_net_ops = {
	368	.init = udplite_net_init,
	369	.exit = udplite_net_exit,
	370	.id = &udplite_net_id,
	371	.size = sizeof(struct udplite_net),
	372	};
	373
	374	static int __init nf_conntrack_proto_udplite_init(void)
	375	{
c296bb4d G	376	int ret;
c296bb4d G	377
0d98da5d G	378	ret = register_pernet_subsys(&udplite_net_ops);
	379	if (ret < 0)
	380	goto out_pernet;
	381
c296bb4d G	382	ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_udplite4);
	383	if (ret < 0)
	384	goto out_udplite4;
	385
	386	ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_udplite6);
	387	if (ret < 0)
	388	goto out_udplite6;
	389
c296bb4d	390	return 0;
c296bb4d G	391	out_udplite6:
	392	nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udplite4);
	393	out_udplite4:
0d98da5d G	394	unregister_pernet_subsys(&udplite_net_ops);
0d98da5d G	395	out_pernet:
c296bb4d	396	return ret;
59eecdfb PM	397	}
	398
	399	static void __exit nf_conntrack_proto_udplite_exit(void)
	400	{
c296bb4d G	401	nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udplite6);
c296bb4d G	402	nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udplite4);
a8021fed	403	unregister_pernet_subsys(&udplite_net_ops);
59eecdfb PM	404	}
	405
	406	module_init(nf_conntrack_proto_udplite_init);
	407	module_exit(nf_conntrack_proto_udplite_exit);
	408
	409	MODULE_LICENSE("GPL");