[deliverable/linux.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 nf_conntrack_tuple *tuple)
{
	const struct udphdr *hp;
	struct udphdr _hdr;

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

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

	return true;
}

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

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

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

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

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

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

	/* Header is too small? */
	hdr = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
	if (hdr == NULL) {
		if (LOG_INVALID(net, IPPROTO_UDP))
			nf_log_packet(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,
	},
	{ }
};
#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
static struct ctl_table udp_compat_sysctl_table[] = {
	{
		.procname	= "ip_conntrack_udp_timeout",
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_jiffies,
	},
	{
		.procname	= "ip_conntrack_udp_timeout_stream",
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_jiffies,
	},
	{ }
};
#endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
#endif /* CONFIG_SYSCTL */

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

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

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

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

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

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

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

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

	return ret;
}

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",
	.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",
	.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 YK	40	unsigned int dataoff,
	41	struct nf_conntrack_tuple *tuple)
	42	{
da3f13c9 JE	43	const struct udphdr *hp;
da3f13c9 JE	44	struct udphdr _hdr;
9fb9cbb1 YK	45
	46	/* Actually only need first 8 bytes. */
	47	hp = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
	48	if (hp == NULL)
09f263cd	49	return false;
9fb9cbb1 YK	50
	51	tuple->src.u.udp.port = hp->source;
	52	tuple->dst.u.udp.port = hp->dest;
	53
09f263cd	54	return true;
9fb9cbb1 YK	55	}
9fb9cbb1 YK	56
09f263cd JE	57	static bool udp_invert_tuple(struct nf_conntrack_tuple *tuple,
09f263cd JE	58	const struct nf_conntrack_tuple *orig)
9fb9cbb1 YK	59	{
	60	tuple->src.u.udp.port = orig->dst.u.udp.port;
	61	tuple->dst.u.udp.port = orig->src.u.udp.port;
09f263cd	62	return true;
9fb9cbb1 YK	63	}
	64
	65	/* Print out the per-protocol part of the tuple. */
	66	static int udp_print_tuple(struct seq_file *s,
	67	const struct nf_conntrack_tuple *tuple)
	68	{
	69	return seq_printf(s, "sport=%hu dport=%hu ",
	70	ntohs(tuple->src.u.udp.port),
	71	ntohs(tuple->dst.u.udp.port));
	72	}
	73
2c8503f5 PNA	74	static unsigned int udp_get_timeouts(struct net net)
2c8503f5 PNA	75	{
0ce490ad	76	return udp_pernet(net)->timeouts;
2c8503f5 PNA	77	}
2c8503f5 PNA	78
9fb9cbb1	79	/* Returns verdict for packet, and may modify conntracktype */
c88130bc	80	static int udp_packet(struct nf_conn *ct,
9fb9cbb1 YK	81	const struct sk_buff *skb,
	82	unsigned int dataoff,
	83	enum ip_conntrack_info ctinfo,
76108cea	84	u_int8_t pf,
2c8503f5 PNA	85	unsigned int hooknum,
2c8503f5 PNA	86	unsigned int *timeouts)
9fb9cbb1 YK	87	{
	88	/* If we've seen traffic both ways, this is some kind of UDP
	89	stream. Extend timeout. */
c88130bc	90	if (test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) {
5a41db94	91	nf_ct_refresh_acct(ct, ctinfo, skb,
2c8503f5	92	timeouts[UDP_CT_REPLIED]);
9fb9cbb1	93	/* Also, more likely to be important, and not a probe */
c88130bc	94	if (!test_and_set_bit(IPS_ASSURED_BIT, &ct->status))
858b3133	95	nf_conntrack_event_cache(IPCT_ASSURED, ct);
5a41db94 PNA	96	} else {
5a41db94 PNA	97	nf_ct_refresh_acct(ct, ctinfo, skb,
2c8503f5	98	timeouts[UDP_CT_UNREPLIED]);
5a41db94	99	}
9fb9cbb1 YK	100	return NF_ACCEPT;
	101	}
	102
	103	/* Called when a new connection for this protocol found. */
09f263cd	104	static bool udp_new(struct nf_conn ct, const struct sk_buff skb,
2c8503f5	105	unsigned int dataoff, unsigned int *timeouts)
9fb9cbb1	106	{
09f263cd	107	return true;
9fb9cbb1 YK	108	}
9fb9cbb1 YK	109
8fea97ec PM	110	static int udp_error(struct net net, struct nf_conn tmpl, struct sk_buff *skb,
8fea97ec PM	111	unsigned int dataoff, enum ip_conntrack_info *ctinfo,
76108cea	112	u_int8_t pf,
96f6bf82	113	unsigned int hooknum)
9fb9cbb1 YK	114	{
9fb9cbb1 YK	115	unsigned int udplen = skb->len - dataoff;
da3f13c9 JE	116	const struct udphdr *hdr;
da3f13c9 JE	117	struct udphdr _hdr;
9fb9cbb1 YK	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_UDP))
30e0c6a6	123	nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
9fb9cbb1 YK	124	"nf_ct_udp: short packet ");
	125	return -NF_ACCEPT;
	126	}
	127
	128	/* Truncated/malformed packets */
	129	if (ntohs(hdr->len) > udplen \|\| ntohs(hdr->len) < sizeof(*hdr)) {
c2a2c7e0	130	if (LOG_INVALID(net, IPPROTO_UDP))
30e0c6a6	131	nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
9fb9cbb1 YK	132	"nf_ct_udp: truncated/malformed packet ");
	133	return -NF_ACCEPT;
	134	}
	135
	136	/* Packet with no checksum */
	137	if (!hdr->check)
	138	return NF_ACCEPT;
	139
	140	/* Checksum invalid? Ignore.
	141	* We skip checking packets on the outgoing path
84fa7933	142	* because the checksum is assumed to be correct.
9fb9cbb1	143	* FIXME: Source route IP option packets --RR */
c04d0552	144	if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
96f6bf82	145	nf_checksum(skb, hooknum, dataoff, IPPROTO_UDP, pf)) {
c2a2c7e0	146	if (LOG_INVALID(net, IPPROTO_UDP))
30e0c6a6	147	nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
9fb9cbb1 YK	148	"nf_ct_udp: bad UDP checksum ");
	149	return -NF_ACCEPT;
	150	}
	151
	152	return NF_ACCEPT;
	153	}
	154
50978462 PNA	155	#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	156
	157	#include <linux/netfilter/nfnetlink.h>
	158	#include <linux/netfilter/nfnetlink_cttimeout.h>
	159
8264deb8 G	160	static int udp_timeout_nlattr_to_obj(struct nlattr *tb[],
8264deb8 G	161	struct net net, void data)
50978462 PNA	162	{
50978462 PNA	163	unsigned int *timeouts = data;
8264deb8	164	struct nf_udp_net *un = udp_pernet(net);
50978462 PNA	165
50978462 PNA	166	/* set default timeouts for UDP. */
8264deb8 G	167	timeouts[UDP_CT_UNREPLIED] = un->timeouts[UDP_CT_UNREPLIED];
8264deb8 G	168	timeouts[UDP_CT_REPLIED] = un->timeouts[UDP_CT_REPLIED];
50978462 PNA	169
	170	if (tb[CTA_TIMEOUT_UDP_UNREPLIED]) {
	171	timeouts[UDP_CT_UNREPLIED] =
	172	ntohl(nla_get_be32(tb[CTA_TIMEOUT_UDP_UNREPLIED])) * HZ;
	173	}
	174	if (tb[CTA_TIMEOUT_UDP_REPLIED]) {
	175	timeouts[UDP_CT_REPLIED] =
	176	ntohl(nla_get_be32(tb[CTA_TIMEOUT_UDP_REPLIED])) * HZ;
	177	}
	178	return 0;
	179	}
	180
	181	static int
	182	udp_timeout_obj_to_nlattr(struct sk_buff skb, const void data)
	183	{
	184	const unsigned int *timeouts = data;
	185
3c60a17b DM	186	if (nla_put_be32(skb, CTA_TIMEOUT_UDP_UNREPLIED,
	187	htonl(timeouts[UDP_CT_UNREPLIED] / HZ)) \|\|
	188	nla_put_be32(skb, CTA_TIMEOUT_UDP_REPLIED,
	189	htonl(timeouts[UDP_CT_REPLIED] / HZ)))
	190	goto nla_put_failure;
50978462 PNA	191	return 0;
	192
	193	nla_put_failure:
	194	return -ENOSPC;
	195	}
	196
	197	static const struct nla_policy
	198	udp_timeout_nla_policy[CTA_TIMEOUT_UDP_MAX+1] = {
	199	[CTA_TIMEOUT_UDP_UNREPLIED] = { .type = NLA_U32 },
	200	[CTA_TIMEOUT_UDP_REPLIED] = { .type = NLA_U32 },
	201	};
	202	#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
	203
933a41e7	204	#ifdef CONFIG_SYSCTL
933a41e7 PM	205	static struct ctl_table udp_sysctl_table[] = {
933a41e7 PM	206	{
933a41e7	207	.procname = "nf_conntrack_udp_timeout",
933a41e7 PM	208	.maxlen = sizeof(unsigned int),
933a41e7 PM	209	.mode = 0644,
6d9f239a	210	.proc_handler = proc_dointvec_jiffies,
933a41e7 PM	211	},
933a41e7 PM	212	{
933a41e7	213	.procname = "nf_conntrack_udp_timeout_stream",
933a41e7 PM	214	.maxlen = sizeof(unsigned int),
933a41e7 PM	215	.mode = 0644,
6d9f239a	216	.proc_handler = proc_dointvec_jiffies,
933a41e7	217	},
f8572d8f	218	{ }
933a41e7	219	};
a999e683 PM	220	#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
	221	static struct ctl_table udp_compat_sysctl_table[] = {
	222	{
a999e683	223	.procname = "ip_conntrack_udp_timeout",
a999e683 PM	224	.maxlen = sizeof(unsigned int),
a999e683 PM	225	.mode = 0644,
6d9f239a	226	.proc_handler = proc_dointvec_jiffies,
a999e683 PM	227	},
a999e683 PM	228	{
a999e683	229	.procname = "ip_conntrack_udp_timeout_stream",
a999e683 PM	230	.maxlen = sizeof(unsigned int),
a999e683 PM	231	.mode = 0644,
6d9f239a	232	.proc_handler = proc_dointvec_jiffies,
a999e683	233	},
f8572d8f	234	{ }
a999e683 PM	235	};
a999e683 PM	236	#endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
933a41e7 PM	237	#endif /* CONFIG_SYSCTL */
933a41e7 PM	238
dee7364e G	239	static int udp_kmemdup_sysctl_table(struct nf_proto_net *pn,
dee7364e G	240	struct nf_udp_net *un)
0ce490ad G	241	{
0ce490ad G	242	#ifdef CONFIG_SYSCTL
0ce490ad G	243	if (pn->ctl_table)
	244	return 0;
	245	pn->ctl_table = kmemdup(udp_sysctl_table,
	246	sizeof(udp_sysctl_table),
	247	GFP_KERNEL);
	248	if (!pn->ctl_table)
	249	return -ENOMEM;
	250	pn->ctl_table[0].data = &un->timeouts[UDP_CT_UNREPLIED];
	251	pn->ctl_table[1].data = &un->timeouts[UDP_CT_REPLIED];
	252	#endif
	253	return 0;
	254	}
	255
dee7364e G	256	static int udp_kmemdup_compat_sysctl_table(struct nf_proto_net *pn,
dee7364e G	257	struct nf_udp_net *un)
0ce490ad G	258	{
	259	#ifdef CONFIG_SYSCTL
	260	#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
0ce490ad G	261	pn->ctl_compat_table = kmemdup(udp_compat_sysctl_table,
	262	sizeof(udp_compat_sysctl_table),
	263	GFP_KERNEL);
	264	if (!pn->ctl_compat_table)
	265	return -ENOMEM;
	266
	267	pn->ctl_compat_table[0].data = &un->timeouts[UDP_CT_UNREPLIED];
	268	pn->ctl_compat_table[1].data = &un->timeouts[UDP_CT_REPLIED];
	269	#endif
	270	#endif
	271	return 0;
	272	}
	273
dee7364e	274	static int udp_init_net(struct net *net, u_int16_t proto)
0ce490ad G	275	{
	276	int ret;
	277	struct nf_udp_net *un = udp_pernet(net);
dee7364e	278	struct nf_proto_net *pn = &un->pn;
0ce490ad	279
dee7364e G	280	if (!pn->users) {
dee7364e G	281	int i;
0ce490ad	282
dee7364e G	283	for (i = 0; i < UDP_CT_MAX; i++)
dee7364e G	284	un->timeouts[i] = udp_timeouts[i];
0ce490ad	285	}
0ce490ad	286
dee7364e G	287	if (proto == AF_INET) {
	288	ret = udp_kmemdup_compat_sysctl_table(pn, un);
	289	if (ret < 0)
	290	return ret;
0ce490ad	291
dee7364e G	292	ret = udp_kmemdup_sysctl_table(pn, un);
	293	if (ret < 0)
	294	nf_ct_kfree_compat_sysctl_table(pn);
	295	} else
	296	ret = udp_kmemdup_sysctl_table(pn, un);
	297
	298	return ret;
0ce490ad G	299	}
0ce490ad G	300
08911475 PNA	301	static struct nf_proto_net udp_get_net_proto(struct net net)
	302	{
	303	return &net->ct.nf_ct_proto.udp.pn;
	304	}
	305
61075af5	306	struct nf_conntrack_l4proto nf_conntrack_l4proto_udp4 __read_mostly =
9fb9cbb1 YK	307	{
9fb9cbb1 YK	308	.l3proto = PF_INET,
605dcad6	309	.l4proto = IPPROTO_UDP,
9fb9cbb1 YK	310	.name = "udp",
	311	.pkt_to_tuple = udp_pkt_to_tuple,
	312	.invert_tuple = udp_invert_tuple,
	313	.print_tuple = udp_print_tuple,
9fb9cbb1	314	.packet = udp_packet,
2c8503f5	315	.get_timeouts = udp_get_timeouts,
9fb9cbb1	316	.new = udp_new,
96f6bf82	317	.error = udp_error,
c0cd1156	318	#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
fdf70832 PM	319	.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
fdf70832 PM	320	.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
a400c30e	321	.nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
f73e924c	322	.nla_policy = nf_ct_port_nla_policy,
c1d10adb	323	#endif
50978462 PNA	324	#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	325	.ctnl_timeout = {
	326	.nlattr_to_obj = udp_timeout_nlattr_to_obj,
	327	.obj_to_nlattr = udp_timeout_obj_to_nlattr,
	328	.nlattr_max = CTA_TIMEOUT_UDP_MAX,
	329	.obj_size = sizeof(unsigned int) * CTA_TIMEOUT_UDP_MAX,
	330	.nla_policy = udp_timeout_nla_policy,
	331	},
	332	#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
dee7364e	333	.init_net = udp_init_net,
08911475	334	.get_net_proto = udp_get_net_proto,
9fb9cbb1	335	};
13b18339	336	EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udp4);
9fb9cbb1	337
61075af5	338	struct nf_conntrack_l4proto nf_conntrack_l4proto_udp6 __read_mostly =
9fb9cbb1 YK	339	{
9fb9cbb1 YK	340	.l3proto = PF_INET6,
605dcad6	341	.l4proto = IPPROTO_UDP,
9fb9cbb1 YK	342	.name = "udp",
	343	.pkt_to_tuple = udp_pkt_to_tuple,
	344	.invert_tuple = udp_invert_tuple,
	345	.print_tuple = udp_print_tuple,
9fb9cbb1	346	.packet = udp_packet,
2c8503f5	347	.get_timeouts = udp_get_timeouts,
9fb9cbb1	348	.new = udp_new,
96f6bf82	349	.error = udp_error,
c0cd1156	350	#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
fdf70832 PM	351	.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
fdf70832 PM	352	.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
a400c30e	353	.nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
f73e924c	354	.nla_policy = nf_ct_port_nla_policy,
c1d10adb	355	#endif
50978462 PNA	356	#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	357	.ctnl_timeout = {
	358	.nlattr_to_obj = udp_timeout_nlattr_to_obj,
	359	.obj_to_nlattr = udp_timeout_obj_to_nlattr,
	360	.nlattr_max = CTA_TIMEOUT_UDP_MAX,
	361	.obj_size = sizeof(unsigned int) * CTA_TIMEOUT_UDP_MAX,
	362	.nla_policy = udp_timeout_nla_policy,
	363	},
	364	#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
dee7364e	365	.init_net = udp_init_net,
08911475	366	.get_net_proto = udp_get_net_proto,
9fb9cbb1	367	};
13b18339	368	EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udp6);