[thirdparty/kernel/stable.git] / net / netfilter / nf_conntrack_proto_icmpv6.c

/*
 * Copyright (C)2003,2004 USAGI/WIDE Project
 *
 * 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.
 *
 * Author:
 *	Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
 */

#include <linux/types.h>
#include <linux/timer.h>
#include <linux/module.h>
#include <linux/netfilter.h>
#include <linux/in6.h>
#include <linux/icmpv6.h>
#include <linux/ipv6.h>
#include <net/ipv6.h>
#include <net/ip6_checksum.h>
#include <linux/seq_file.h>
#include <linux/netfilter_ipv6.h>
#include <net/netfilter/nf_conntrack_tuple.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_timeout.h>
#include <net/netfilter/nf_conntrack_zones.h>
#include <net/netfilter/ipv6/nf_conntrack_icmpv6.h>
#include <net/netfilter/nf_log.h>

static const unsigned int nf_ct_icmpv6_timeout = 30*HZ;

bool icmpv6_pkt_to_tuple(const struct sk_buff *skb,
			 unsigned int dataoff,
			 struct net *net,
			 struct nf_conntrack_tuple *tuple)
{
	const struct icmp6hdr *hp;
	struct icmp6hdr _hdr;

	hp = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
	if (hp == NULL)
		return false;
	tuple->dst.u.icmp.type = hp->icmp6_type;
	tuple->src.u.icmp.id = hp->icmp6_identifier;
	tuple->dst.u.icmp.code = hp->icmp6_code;

	return true;
}

/* Add 1; spaces filled with 0. */
static const u_int8_t invmap[] = {
	[ICMPV6_ECHO_REQUEST - 128]	= ICMPV6_ECHO_REPLY + 1,
	[ICMPV6_ECHO_REPLY - 128]	= ICMPV6_ECHO_REQUEST + 1,
	[ICMPV6_NI_QUERY - 128]		= ICMPV6_NI_REPLY + 1,
	[ICMPV6_NI_REPLY - 128]		= ICMPV6_NI_QUERY + 1
};

static const u_int8_t noct_valid_new[] = {
	[ICMPV6_MGM_QUERY - 130] = 1,
	[ICMPV6_MGM_REPORT - 130] = 1,
	[ICMPV6_MGM_REDUCTION - 130] = 1,
	[NDISC_ROUTER_SOLICITATION - 130] = 1,
	[NDISC_ROUTER_ADVERTISEMENT - 130] = 1,
	[NDISC_NEIGHBOUR_SOLICITATION - 130] = 1,
	[NDISC_NEIGHBOUR_ADVERTISEMENT - 130] = 1,
	[ICMPV6_MLD2_REPORT - 130] = 1
};

bool nf_conntrack_invert_icmpv6_tuple(struct nf_conntrack_tuple *tuple,
				      const struct nf_conntrack_tuple *orig)
{
	int type = orig->dst.u.icmp.type - 128;
	if (type < 0 || type >= sizeof(invmap) || !invmap[type])
		return false;

	tuple->src.u.icmp.id   = orig->src.u.icmp.id;
	tuple->dst.u.icmp.type = invmap[type] - 1;
	tuple->dst.u.icmp.code = orig->dst.u.icmp.code;
	return true;
}

static unsigned int *icmpv6_get_timeouts(struct net *net)
{
	return &nf_icmpv6_pernet(net)->timeout;
}

/* Returns verdict for packet, or -1 for invalid. */
int nf_conntrack_icmpv6_packet(struct nf_conn *ct,
			       struct sk_buff *skb,
			       enum ip_conntrack_info ctinfo,
			       const struct nf_hook_state *state)
{
	unsigned int *timeout = nf_ct_timeout_lookup(ct);
	static const u8 valid_new[] = {
		[ICMPV6_ECHO_REQUEST - 128] = 1,
		[ICMPV6_NI_QUERY - 128] = 1
	};

	if (state->pf != NFPROTO_IPV6)
		return -NF_ACCEPT;

	if (!nf_ct_is_confirmed(ct)) {
		int type = ct->tuplehash[0].tuple.dst.u.icmp.type - 128;

		if (type < 0 || type >= sizeof(valid_new) || !valid_new[type]) {
			/* Can't create a new ICMPv6 `conn' with this. */
			pr_debug("icmpv6: can't create new conn with type %u\n",
				 type + 128);
			nf_ct_dump_tuple_ipv6(&ct->tuplehash[0].tuple);
			return -NF_ACCEPT;
		}
	}

	if (!timeout)
		timeout = icmpv6_get_timeouts(nf_ct_net(ct));

	/* Do not immediately delete the connection after the first
	   successful reply to avoid excessive conntrackd traffic
	   and also to handle correctly ICMP echo reply duplicates. */
	nf_ct_refresh_acct(ct, ctinfo, skb, *timeout);

	return NF_ACCEPT;
}

static int
icmpv6_error_message(struct net *net, struct nf_conn *tmpl,
		     struct sk_buff *skb,
		     unsigned int icmp6off)
{
	struct nf_conntrack_tuple intuple, origtuple;
	const struct nf_conntrack_tuple_hash *h;
	enum ip_conntrack_info ctinfo;
	struct nf_conntrack_zone tmp;

	WARN_ON(skb_nfct(skb));

	/* Are they talking about one of our connections? */
	if (!nf_ct_get_tuplepr(skb,
			       skb_network_offset(skb)
				+ sizeof(struct ipv6hdr)
				+ sizeof(struct icmp6hdr),
			       PF_INET6, net, &origtuple)) {
		pr_debug("icmpv6_error: Can't get tuple\n");
		return -NF_ACCEPT;
	}

	/* Ordinarily, we'd expect the inverted tupleproto, but it's
	   been preserved inside the ICMP. */
	if (!nf_ct_invert_tuple(&intuple, &origtuple)) {
		pr_debug("icmpv6_error: Can't invert tuple\n");
		return -NF_ACCEPT;
	}

	ctinfo = IP_CT_RELATED;

	h = nf_conntrack_find_get(net, nf_ct_zone_tmpl(tmpl, skb, &tmp),
				  &intuple);
	if (!h) {
		pr_debug("icmpv6_error: no match\n");
		return -NF_ACCEPT;
	} else {
		if (NF_CT_DIRECTION(h) == IP_CT_DIR_REPLY)
			ctinfo += IP_CT_IS_REPLY;
	}

	/* Update skb to refer to this connection */
	nf_ct_set(skb, nf_ct_tuplehash_to_ctrack(h), ctinfo);
	return NF_ACCEPT;
}

static void icmpv6_error_log(const struct sk_buff *skb,
			     const struct nf_hook_state *state,
			     const char *msg)
{
	nf_l4proto_log_invalid(skb, state->net, state->pf,
			       IPPROTO_ICMPV6, "%s", msg);
}

int nf_conntrack_icmpv6_error(struct nf_conn *tmpl,
			      struct sk_buff *skb,
			      unsigned int dataoff,
			      const struct nf_hook_state *state)
{
	const struct icmp6hdr *icmp6h;
	struct icmp6hdr _ih;
	int type;

	icmp6h = skb_header_pointer(skb, dataoff, sizeof(_ih), &_ih);
	if (icmp6h == NULL) {
		icmpv6_error_log(skb, state, "short packet");
		return -NF_ACCEPT;
	}

	if (state->hook == NF_INET_PRE_ROUTING &&
	    state->net->ct.sysctl_checksum &&
	    nf_ip6_checksum(skb, state->hook, dataoff, IPPROTO_ICMPV6)) {
		icmpv6_error_log(skb, state, "ICMPv6 checksum failed");
		return -NF_ACCEPT;
	}

	type = icmp6h->icmp6_type - 130;
	if (type >= 0 && type < sizeof(noct_valid_new) &&
	    noct_valid_new[type]) {
		nf_ct_set(skb, NULL, IP_CT_UNTRACKED);
		return NF_ACCEPT;
	}

	/* is not error message ? */
	if (icmp6h->icmp6_type >= 128)
		return NF_ACCEPT;

	return icmpv6_error_message(state->net, tmpl, skb, dataoff);
}

#if IS_ENABLED(CONFIG_NF_CT_NETLINK)

#include <linux/netfilter/nfnetlink.h>
#include <linux/netfilter/nfnetlink_conntrack.h>
static int icmpv6_tuple_to_nlattr(struct sk_buff *skb,
				  const struct nf_conntrack_tuple *t)
{
	if (nla_put_be16(skb, CTA_PROTO_ICMPV6_ID, t->src.u.icmp.id) ||
	    nla_put_u8(skb, CTA_PROTO_ICMPV6_TYPE, t->dst.u.icmp.type) ||
	    nla_put_u8(skb, CTA_PROTO_ICMPV6_CODE, t->dst.u.icmp.code))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -1;
}

static const struct nla_policy icmpv6_nla_policy[CTA_PROTO_MAX+1] = {
	[CTA_PROTO_ICMPV6_TYPE]	= { .type = NLA_U8 },
	[CTA_PROTO_ICMPV6_CODE]	= { .type = NLA_U8 },
	[CTA_PROTO_ICMPV6_ID]	= { .type = NLA_U16 },
};

static int icmpv6_nlattr_to_tuple(struct nlattr *tb[],
				struct nf_conntrack_tuple *tuple)
{
	if (!tb[CTA_PROTO_ICMPV6_TYPE] ||
	    !tb[CTA_PROTO_ICMPV6_CODE] ||
	    !tb[CTA_PROTO_ICMPV6_ID])
		return -EINVAL;

	tuple->dst.u.icmp.type = nla_get_u8(tb[CTA_PROTO_ICMPV6_TYPE]);
	tuple->dst.u.icmp.code = nla_get_u8(tb[CTA_PROTO_ICMPV6_CODE]);
	tuple->src.u.icmp.id = nla_get_be16(tb[CTA_PROTO_ICMPV6_ID]);

	if (tuple->dst.u.icmp.type < 128 ||
	    tuple->dst.u.icmp.type - 128 >= sizeof(invmap) ||
	    !invmap[tuple->dst.u.icmp.type - 128])
		return -EINVAL;

	return 0;
}

static unsigned int icmpv6_nlattr_tuple_size(void)
{
	static unsigned int size __read_mostly;

	if (!size)
		size = nla_policy_len(icmpv6_nla_policy, CTA_PROTO_MAX + 1);

	return size;
}
#endif

#ifdef CONFIG_NF_CONNTRACK_TIMEOUT

#include <linux/netfilter/nfnetlink.h>
#include <linux/netfilter/nfnetlink_cttimeout.h>

static int icmpv6_timeout_nlattr_to_obj(struct nlattr *tb[],
					struct net *net, void *data)
{
	unsigned int *timeout = data;
	struct nf_icmp_net *in = nf_icmpv6_pernet(net);

	if (!timeout)
		timeout = icmpv6_get_timeouts(net);
	if (tb[CTA_TIMEOUT_ICMPV6_TIMEOUT]) {
		*timeout =
		    ntohl(nla_get_be32(tb[CTA_TIMEOUT_ICMPV6_TIMEOUT])) * HZ;
	} else {
		/* Set default ICMPv6 timeout. */
		*timeout = in->timeout;
	}
	return 0;
}

static int
icmpv6_timeout_obj_to_nlattr(struct sk_buff *skb, const void *data)
{
	const unsigned int *timeout = data;

	if (nla_put_be32(skb, CTA_TIMEOUT_ICMPV6_TIMEOUT, htonl(*timeout / HZ)))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -ENOSPC;
}

static const struct nla_policy
icmpv6_timeout_nla_policy[CTA_TIMEOUT_ICMPV6_MAX+1] = {
	[CTA_TIMEOUT_ICMPV6_TIMEOUT]	= { .type = NLA_U32 },
};
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */


static int icmpv6_init_net(struct net *net)
{
	struct nf_icmp_net *in = nf_icmpv6_pernet(net);

	in->timeout = nf_ct_icmpv6_timeout;

	return 0;
}

static struct nf_proto_net *icmpv6_get_net_proto(struct net *net)
{
	return &net->ct.nf_ct_proto.icmpv6.pn;
}

const struct nf_conntrack_l4proto nf_conntrack_l4proto_icmpv6 =
{
	.l4proto		= IPPROTO_ICMPV6,
#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
	.tuple_to_nlattr	= icmpv6_tuple_to_nlattr,
	.nlattr_tuple_size	= icmpv6_nlattr_tuple_size,
	.nlattr_to_tuple	= icmpv6_nlattr_to_tuple,
	.nla_policy		= icmpv6_nla_policy,
#endif
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
	.ctnl_timeout		= {
		.nlattr_to_obj	= icmpv6_timeout_nlattr_to_obj,
		.obj_to_nlattr	= icmpv6_timeout_obj_to_nlattr,
		.nlattr_max	= CTA_TIMEOUT_ICMP_MAX,
		.obj_size	= sizeof(unsigned int),
		.nla_policy	= icmpv6_timeout_nla_policy,
	},
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
	.init_net		= icmpv6_init_net,
	.get_net_proto		= icmpv6_get_net_proto,
};
Commit	Line	Data
9fb9cbb1 YK	1	/*
	2	* Copyright (C)2003,2004 USAGI/WIDE Project
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 as
	6	* published by the Free Software Foundation.
	7	*
	8	* Author:
	9	* Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
9fb9cbb1 YK	10	*/
	11
	12	#include <linux/types.h>
9fb9cbb1 YK	13	#include <linux/timer.h>
	14	#include <linux/module.h>
	15	#include <linux/netfilter.h>
	16	#include <linux/in6.h>
	17	#include <linux/icmpv6.h>
	18	#include <linux/ipv6.h>
	19	#include <net/ipv6.h>
	20	#include <net/ip6_checksum.h>
	21	#include <linux/seq_file.h>
	22	#include <linux/netfilter_ipv6.h>
	23	#include <net/netfilter/nf_conntrack_tuple.h>
605dcad6	24	#include <net/netfilter/nf_conntrack_l4proto.h>
9fb9cbb1	25	#include <net/netfilter/nf_conntrack_core.h>
c779e849	26	#include <net/netfilter/nf_conntrack_timeout.h>
5d0aa2cc	27	#include <net/netfilter/nf_conntrack_zones.h>
9fb9cbb1	28	#include <net/netfilter/ipv6/nf_conntrack_icmpv6.h>
f01ffbd6	29	#include <net/netfilter/nf_log.h>
9fb9cbb1	30
2c9e8637	31	static const unsigned int nf_ct_icmpv6_timeout = 30*HZ;
9fb9cbb1	32
e2e48b47 FW	33	bool icmpv6_pkt_to_tuple(const struct sk_buff *skb,
	34	unsigned int dataoff,
	35	struct net *net,
	36	struct nf_conntrack_tuple *tuple)
9fb9cbb1	37	{
7cc3864d JE	38	const struct icmp6hdr *hp;
7cc3864d JE	39	struct icmp6hdr _hdr;
9fb9cbb1 YK	40
	41	hp = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
	42	if (hp == NULL)
09f263cd	43	return false;
9fb9cbb1 YK	44	tuple->dst.u.icmp.type = hp->icmp6_type;
	45	tuple->src.u.icmp.id = hp->icmp6_identifier;
	46	tuple->dst.u.icmp.code = hp->icmp6_code;
	47
09f263cd	48	return true;
9fb9cbb1 YK	49	}
9fb9cbb1 YK	50
c1d10adb	51	/* Add 1; spaces filled with 0. */
7cc3864d	52	static const u_int8_t invmap[] = {
c1d10adb PNA	53	[ICMPV6_ECHO_REQUEST - 128] = ICMPV6_ECHO_REPLY + 1,
c1d10adb PNA	54	[ICMPV6_ECHO_REPLY - 128] = ICMPV6_ECHO_REQUEST + 1,
a51f42f3	55	[ICMPV6_NI_QUERY - 128] = ICMPV6_NI_REPLY + 1,
f9527ea9	56	[ICMPV6_NI_REPLY - 128] = ICMPV6_NI_QUERY + 1
c1d10adb PNA	57	};
c1d10adb PNA	58
3f900713 EL	59	static const u_int8_t noct_valid_new[] = {
3f900713 EL	60	[ICMPV6_MGM_QUERY - 130] = 1,
f9527ea9	61	[ICMPV6_MGM_REPORT - 130] = 1,
3f900713 EL	62	[ICMPV6_MGM_REDUCTION - 130] = 1,
	63	[NDISC_ROUTER_SOLICITATION - 130] = 1,
	64	[NDISC_ROUTER_ADVERTISEMENT - 130] = 1,
	65	[NDISC_NEIGHBOUR_SOLICITATION - 130] = 1,
	66	[NDISC_NEIGHBOUR_ADVERTISEMENT - 130] = 1,
	67	[ICMPV6_MLD2_REPORT - 130] = 1
	68	};
	69
197c4300 FW	70	bool nf_conntrack_invert_icmpv6_tuple(struct nf_conntrack_tuple *tuple,
197c4300 FW	71	const struct nf_conntrack_tuple *orig)
9fb9cbb1	72	{
f16c9107 YK	73	int type = orig->dst.u.icmp.type - 128;
f16c9107 YK	74	if (type < 0 \|\| type >= sizeof(invmap) \|\| !invmap[type])
09f263cd	75	return false;
9fb9cbb1 YK	76
	77	tuple->src.u.icmp.id = orig->src.u.icmp.id;
	78	tuple->dst.u.icmp.type = invmap[type] - 1;
	79	tuple->dst.u.icmp.code = orig->dst.u.icmp.code;
09f263cd	80	return true;
9fb9cbb1 YK	81	}
9fb9cbb1 YK	82
2c8503f5 PNA	83	static unsigned int icmpv6_get_timeouts(struct net net)
2c8503f5 PNA	84	{
a95a7774	85	return &nf_icmpv6_pernet(net)->timeout;
2c8503f5 PNA	86	}
2c8503f5 PNA	87
9fb9cbb1	88	/* Returns verdict for packet, or -1 for invalid. */
a47c5404 FW	89	int nf_conntrack_icmpv6_packet(struct nf_conn *ct,
	90	struct sk_buff *skb,
	91	enum ip_conntrack_info ctinfo,
	92	const struct nf_hook_state *state)
9fb9cbb1	93	{
c779e849	94	unsigned int *timeout = nf_ct_timeout_lookup(ct);
9976fc6e FW	95	static const u8 valid_new[] = {
	96	[ICMPV6_ECHO_REQUEST - 128] = 1,
	97	[ICMPV6_NI_QUERY - 128] = 1
	98	};
	99
dd2934a9 FW	100	if (state->pf != NFPROTO_IPV6)
	101	return -NF_ACCEPT;
	102
9976fc6e FW	103	if (!nf_ct_is_confirmed(ct)) {
	104	int type = ct->tuplehash[0].tuple.dst.u.icmp.type - 128;
	105
	106	if (type < 0 \|\| type >= sizeof(valid_new) \|\| !valid_new[type]) {
	107	/* Can't create a new ICMPv6 `conn' with this. */
	108	pr_debug("icmpv6: can't create new conn with type %u\n",
	109	type + 128);
	110	nf_ct_dump_tuple_ipv6(&ct->tuplehash[0].tuple);
	111	return -NF_ACCEPT;
	112	}
	113	}
c779e849 FW	114
	115	if (!timeout)
	116	timeout = icmpv6_get_timeouts(nf_ct_net(ct));
	117
f87fb666 JK	118	/* Do not immediately delete the connection after the first
	119	successful reply to avoid excessive conntrackd traffic
	120	and also to handle correctly ICMP echo reply duplicates. */
2c8503f5	121	nf_ct_refresh_acct(ct, ctinfo, skb, *timeout);
9fb9cbb1 YK	122
	123	return NF_ACCEPT;
	124	}
	125
9fb9cbb1	126	static int
5d0aa2cc	127	icmpv6_error_message(struct net net, struct nf_conn tmpl,
74c51a14	128	struct sk_buff *skb,
d1c1e39d	129	unsigned int icmp6off)
9fb9cbb1 YK	130	{
9fb9cbb1 YK	131	struct nf_conntrack_tuple intuple, origtuple;
7cc3864d	132	const struct nf_conntrack_tuple_hash *h;
11df4b76	133	enum ip_conntrack_info ctinfo;
5e8018fc	134	struct nf_conntrack_zone tmp;
9fb9cbb1	135
44d6e2f2	136	WARN_ON(skb_nfct(skb));
9fb9cbb1	137
9fb9cbb1	138	/* Are they talking about one of our connections? */
e2a3123f YK	139	if (!nf_ct_get_tuplepr(skb,
	140	skb_network_offset(skb)
	141	+ sizeof(struct ipv6hdr)
	142	+ sizeof(struct icmp6hdr),
a31f1adc	143	PF_INET6, net, &origtuple)) {
0d53778e	144	pr_debug("icmpv6_error: Can't get tuple\n");
9fb9cbb1 YK	145	return -NF_ACCEPT;
	146	}
	147
	148	/* Ordinarily, we'd expect the inverted tupleproto, but it's
	149	been preserved inside the ICMP. */
303e0c55	150	if (!nf_ct_invert_tuple(&intuple, &origtuple)) {
0d53778e	151	pr_debug("icmpv6_error: Can't invert tuple\n");
9fb9cbb1 YK	152	return -NF_ACCEPT;
	153	}
	154
11df4b76	155	ctinfo = IP_CT_RELATED;
9fb9cbb1	156
5e8018fc DB	157	h = nf_conntrack_find_get(net, nf_ct_zone_tmpl(tmpl, skb, &tmp),
5e8018fc DB	158	&intuple);
9fb9cbb1	159	if (!h) {
0d53778e	160	pr_debug("icmpv6_error: no match\n");
9fb9cbb1 YK	161	return -NF_ACCEPT;
	162	} else {
	163	if (NF_CT_DIRECTION(h) == IP_CT_DIR_REPLY)
11df4b76	164	ctinfo += IP_CT_IS_REPLY;
9fb9cbb1 YK	165	}
	166
	167	/* Update skb to refer to this connection */
c74454fa	168	nf_ct_set(skb, nf_ct_tuplehash_to_ctrack(h), ctinfo);
88ed01d1	169	return NF_ACCEPT;
9fb9cbb1 YK	170	}
9fb9cbb1 YK	171
93e66024 FW	172	static void icmpv6_error_log(const struct sk_buff *skb,
	173	const struct nf_hook_state *state,
	174	const char *msg)
c4f3db15	175	{
93e66024 FW	176	nf_l4proto_log_invalid(skb, state->net, state->pf,
93e66024 FW	177	IPPROTO_ICMPV6, "%s", msg);
c4f3db15 FW	178	}
c4f3db15 FW	179
6fe78fa4 FW	180	int nf_conntrack_icmpv6_error(struct nf_conn *tmpl,
	181	struct sk_buff *skb,
	182	unsigned int dataoff,
	183	const struct nf_hook_state *state)
9fb9cbb1	184	{
7cc3864d JE	185	const struct icmp6hdr *icmp6h;
7cc3864d JE	186	struct icmp6hdr _ih;
3f900713	187	int type;
9fb9cbb1 YK	188
	189	icmp6h = skb_header_pointer(skb, dataoff, sizeof(_ih), &_ih);
	190	if (icmp6h == NULL) {
93e66024	191	icmpv6_error_log(skb, state, "short packet");
9fb9cbb1 YK	192	return -NF_ACCEPT;
	193	}
	194
93e66024 FW	195	if (state->hook == NF_INET_PRE_ROUTING &&
	196	state->net->ct.sysctl_checksum &&
	197	nf_ip6_checksum(skb, state->hook, dataoff, IPPROTO_ICMPV6)) {
	198	icmpv6_error_log(skb, state, "ICMPv6 checksum failed");
9fb9cbb1 YK	199	return -NF_ACCEPT;
	200	}
	201
3f900713 EL	202	type = icmp6h->icmp6_type - 130;
	203	if (type >= 0 && type < sizeof(noct_valid_new) &&
	204	noct_valid_new[type]) {
cc41c84b	205	nf_ct_set(skb, NULL, IP_CT_UNTRACKED);
3f900713 EL	206	return NF_ACCEPT;
	207	}
	208
9fb9cbb1 YK	209	/* is not error message ? */
	210	if (icmp6h->icmp6_type >= 128)
	211	return NF_ACCEPT;
	212
93e66024	213	return icmpv6_error_message(state->net, tmpl, skb, dataoff);
9fb9cbb1 YK	214	}
9fb9cbb1 YK	215
07a93626	216	#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
c1d10adb PNA	217
	218	#include <linux/netfilter/nfnetlink.h>
	219	#include <linux/netfilter/nfnetlink_conntrack.h>
fdf70832	220	static int icmpv6_tuple_to_nlattr(struct sk_buff *skb,
c1d10adb PNA	221	const struct nf_conntrack_tuple *t)
c1d10adb PNA	222	{
e549a6b3 DM	223	if (nla_put_be16(skb, CTA_PROTO_ICMPV6_ID, t->src.u.icmp.id) \|\|
	224	nla_put_u8(skb, CTA_PROTO_ICMPV6_TYPE, t->dst.u.icmp.type) \|\|
	225	nla_put_u8(skb, CTA_PROTO_ICMPV6_CODE, t->dst.u.icmp.code))
	226	goto nla_put_failure;
c1d10adb PNA	227	return 0;
c1d10adb PNA	228
df6fb868	229	nla_put_failure:
c1d10adb PNA	230	return -1;
	231	}
	232
f73e924c PM	233	static const struct nla_policy icmpv6_nla_policy[CTA_PROTO_MAX+1] = {
	234	[CTA_PROTO_ICMPV6_TYPE] = { .type = NLA_U8 },
	235	[CTA_PROTO_ICMPV6_CODE] = { .type = NLA_U8 },
	236	[CTA_PROTO_ICMPV6_ID] = { .type = NLA_U16 },
c1d10adb PNA	237	};
c1d10adb PNA	238
fdf70832	239	static int icmpv6_nlattr_to_tuple(struct nlattr *tb[],
c1d10adb PNA	240	struct nf_conntrack_tuple *tuple)
c1d10adb PNA	241	{
3666ed1c JP	242	if (!tb[CTA_PROTO_ICMPV6_TYPE] \|\|
	243	!tb[CTA_PROTO_ICMPV6_CODE] \|\|
	244	!tb[CTA_PROTO_ICMPV6_ID])
c1d10adb PNA	245	return -EINVAL;
c1d10adb PNA	246
77236b6e PM	247	tuple->dst.u.icmp.type = nla_get_u8(tb[CTA_PROTO_ICMPV6_TYPE]);
	248	tuple->dst.u.icmp.code = nla_get_u8(tb[CTA_PROTO_ICMPV6_CODE]);
	249	tuple->src.u.icmp.id = nla_get_be16(tb[CTA_PROTO_ICMPV6_ID]);
c1d10adb	250
3666ed1c JP	251	if (tuple->dst.u.icmp.type < 128 \|\|
	252	tuple->dst.u.icmp.type - 128 >= sizeof(invmap) \|\|
	253	!invmap[tuple->dst.u.icmp.type - 128])
c1d10adb PNA	254	return -EINVAL;
	255
	256	return 0;
	257	}
a400c30e	258
5caaed15	259	static unsigned int icmpv6_nlattr_tuple_size(void)
a400c30e	260	{
5caaed15 FW	261	static unsigned int size __read_mostly;
	262
	263	if (!size)
	264	size = nla_policy_len(icmpv6_nla_policy, CTA_PROTO_MAX + 1);
	265
	266	return size;
a400c30e	267	}
c1d10adb PNA	268	#endif
c1d10adb PNA	269
a874752a	270	#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
50978462 PNA	271
	272	#include <linux/netfilter/nfnetlink.h>
	273	#include <linux/netfilter/nfnetlink_cttimeout.h>
	274
8264deb8 G	275	static int icmpv6_timeout_nlattr_to_obj(struct nlattr *tb[],
8264deb8 G	276	struct net net, void data)
50978462 PNA	277	{
50978462 PNA	278	unsigned int *timeout = data;
a95a7774	279	struct nf_icmp_net *in = nf_icmpv6_pernet(net);
50978462	280
c779e849 FW	281	if (!timeout)
c779e849 FW	282	timeout = icmpv6_get_timeouts(net);
50978462 PNA	283	if (tb[CTA_TIMEOUT_ICMPV6_TIMEOUT]) {
	284	*timeout =
	285	ntohl(nla_get_be32(tb[CTA_TIMEOUT_ICMPV6_TIMEOUT])) * HZ;
	286	} else {
	287	/* Set default ICMPv6 timeout. */
8264deb8	288	*timeout = in->timeout;
50978462 PNA	289	}
	290	return 0;
	291	}
	292
	293	static int
	294	icmpv6_timeout_obj_to_nlattr(struct sk_buff skb, const void data)
	295	{
	296	const unsigned int *timeout = data;
	297
e549a6b3 DM	298	if (nla_put_be32(skb, CTA_TIMEOUT_ICMPV6_TIMEOUT, htonl(*timeout / HZ)))
e549a6b3 DM	299	goto nla_put_failure;
50978462 PNA	300	return 0;
	301
	302	nla_put_failure:
	303	return -ENOSPC;
	304	}
	305
	306	static const struct nla_policy
	307	icmpv6_timeout_nla_policy[CTA_TIMEOUT_ICMPV6_MAX+1] = {
	308	[CTA_TIMEOUT_ICMPV6_TIMEOUT] = { .type = NLA_U32 },
	309	};
a874752a	310	#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
50978462	311
7080ba09	312
ca2ca6e1	313	static int icmpv6_init_net(struct net *net)
8fc02781	314	{
a95a7774	315	struct nf_icmp_net *in = nf_icmpv6_pernet(net);
8fc02781 G	316
	317	in->timeout = nf_ct_icmpv6_timeout;
	318
b884fa46	319	return 0;
8fc02781 G	320	}
8fc02781 G	321
08911475 PNA	322	static struct nf_proto_net icmpv6_get_net_proto(struct net net)
	323	{
	324	return &net->ct.nf_ct_proto.icmpv6.pn;
	325	}
	326
9dae47ab	327	const struct nf_conntrack_l4proto nf_conntrack_l4proto_icmpv6 =
9fb9cbb1	328	{
605dcad6	329	.l4proto = IPPROTO_ICMPV6,
07a93626	330	#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
fdf70832	331	.tuple_to_nlattr = icmpv6_tuple_to_nlattr,
a400c30e	332	.nlattr_tuple_size = icmpv6_nlattr_tuple_size,
fdf70832	333	.nlattr_to_tuple = icmpv6_nlattr_to_tuple,
f73e924c	334	.nla_policy = icmpv6_nla_policy,
c1d10adb	335	#endif
a874752a	336	#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
50978462 PNA	337	.ctnl_timeout = {
	338	.nlattr_to_obj = icmpv6_timeout_nlattr_to_obj,
	339	.obj_to_nlattr = icmpv6_timeout_obj_to_nlattr,
	340	.nlattr_max = CTA_TIMEOUT_ICMP_MAX,
	341	.obj_size = sizeof(unsigned int),
	342	.nla_policy = icmpv6_timeout_nla_policy,
	343	},
a874752a	344	#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
7080ba09	345	.init_net = icmpv6_init_net,
08911475	346	.get_net_proto = icmpv6_get_net_proto,
9fb9cbb1	347	};