[mirror_ubuntu-jammy-kernel.git] / net / netfilter / ipset / ip_set_hash_net.c

/* Copyright (C) 2003-2011 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
 *
 * 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.
 */

/* Kernel module implementing an IP set type: the hash:net type */

#include <linux/jhash.h>
#include <linux/module.h>
#include <linux/ip.h>
#include <linux/skbuff.h>
#include <linux/errno.h>
#include <linux/random.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <net/netlink.h>

#include <linux/netfilter.h>
#include <linux/netfilter/ipset/pfxlen.h>
#include <linux/netfilter/ipset/ip_set.h>
#include <linux/netfilter/ipset/ip_set_timeout.h>
#include <linux/netfilter/ipset/ip_set_hash.h>

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
MODULE_DESCRIPTION("hash:net type of IP sets");
MODULE_ALIAS("ip_set_hash:net");

/* Type specific function prefix */
#define TYPE		hash_net

static bool
hash_net_same_set(const struct ip_set *a, const struct ip_set *b);

#define hash_net4_same_set	hash_net_same_set
#define hash_net6_same_set	hash_net_same_set

/* The type variant functions: IPv4 */

/* Member elements without timeout */
struct hash_net4_elem {
	__be32 ip;
	u16 padding0;
	u8 padding1;
	u8 cidr;
};

/* Member elements with timeout support */
struct hash_net4_telem {
	__be32 ip;
	u16 padding0;
	u8 padding1;
	u8 cidr;
	unsigned long timeout;
};

static inline bool
hash_net4_data_equal(const struct hash_net4_elem *ip1,
		     const struct hash_net4_elem *ip2,
		     u32 *multi)
{
	return ip1->ip == ip2->ip && ip1->cidr == ip2->cidr;
}

static inline bool
hash_net4_data_isnull(const struct hash_net4_elem *elem)
{
	return elem->cidr == 0;
}

static inline void
hash_net4_data_copy(struct hash_net4_elem *dst,
		    const struct hash_net4_elem *src)
{
	dst->ip = src->ip;
	dst->cidr = src->cidr;
}

static inline void
hash_net4_data_netmask(struct hash_net4_elem *elem, u8 cidr)
{
	elem->ip &= ip_set_netmask(cidr);
	elem->cidr = cidr;
}

/* Zero CIDR values cannot be stored */
static inline void
hash_net4_data_zero_out(struct hash_net4_elem *elem)
{
	elem->cidr = 0;
}

static bool
hash_net4_data_list(struct sk_buff *skb, const struct hash_net4_elem *data)
{
	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, data->ip);
	NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr);
	return 0;

nla_put_failure:
	return 1;
}

static bool
hash_net4_data_tlist(struct sk_buff *skb, const struct hash_net4_elem *data)
{
	const struct hash_net4_telem *tdata =
		(const struct hash_net4_telem *)data;

	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, tdata->ip);
	NLA_PUT_U8(skb, IPSET_ATTR_CIDR, tdata->cidr);
	NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
		      htonl(ip_set_timeout_get(tdata->timeout)));

	return 0;

nla_put_failure:
	return 1;
}

#define IP_SET_HASH_WITH_NETS

#define PF		4
#define HOST_MASK	32
#include <linux/netfilter/ipset/ip_set_ahash.h>

static inline void
hash_net4_data_next(struct ip_set_hash *h,
		    const struct hash_net4_elem *d)
{
	h->next.ip = ntohl(d->ip);
}

static int
hash_net4_kadt(struct ip_set *set, const struct sk_buff *skb,
	       const struct xt_action_param *par,
	       enum ipset_adt adt, const struct ip_set_adt_opt *opt)
{
	const struct ip_set_hash *h = set->data;
	ipset_adtfn adtfn = set->variant->adt[adt];
	struct hash_net4_elem data = {
		.cidr = h->nets[0].cidr ? h->nets[0].cidr : HOST_MASK
	};

	if (data.cidr == 0)
		return -EINVAL;
	if (adt == IPSET_TEST)
		data.cidr = HOST_MASK;

	ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip);
	data.ip &= ip_set_netmask(data.cidr);

	return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
}

static int
hash_net4_uadt(struct ip_set *set, struct nlattr *tb[],
	       enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
{
	const struct ip_set_hash *h = set->data;
	ipset_adtfn adtfn = set->variant->adt[adt];
	struct hash_net4_elem data = { .cidr = HOST_MASK };
	u32 timeout = h->timeout;
	u32 ip = 0, ip_to, last;
	int ret;

	if (unlikely(!tb[IPSET_ATTR_IP] ||
		     !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
		return -IPSET_ERR_PROTOCOL;

	if (tb[IPSET_ATTR_LINENO])
		*lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);

	ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip);
	if (ret)
		return ret;

	if (tb[IPSET_ATTR_CIDR]) {
		data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
		if (!data.cidr)
			return -IPSET_ERR_INVALID_CIDR;
	}

	if (tb[IPSET_ATTR_TIMEOUT]) {
		if (!with_timeout(h->timeout))
			return -IPSET_ERR_TIMEOUT;
		timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
	}

	if (adt == IPSET_TEST || !tb[IPSET_ATTR_IP_TO]) {
		data.ip = htonl(ip & ip_set_hostmask(data.cidr));
		ret = adtfn(set, &data, timeout, flags);
		return ip_set_eexist(ret, flags) ? 0 : ret;
	}

	ip_to = ip;
	if (tb[IPSET_ATTR_IP_TO]) {
		ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
		if (ret)
			return ret;
		if (ip_to < ip)
			swap(ip, ip_to);
		if (ip + UINT_MAX == ip_to)
			return -IPSET_ERR_HASH_RANGE;
	}
	if (retried)
		ip = h->next.ip;
	while (!after(ip, ip_to)) {
		data.ip = htonl(ip);
		last = ip_set_range_to_cidr(ip, ip_to, &data.cidr);
		ret = adtfn(set, &data, timeout, flags);
		if (ret && !ip_set_eexist(ret, flags))
			return ret;
		else
			ret = 0;
		ip = last + 1;
	}
	return ret;
}

static bool
hash_net_same_set(const struct ip_set *a, const struct ip_set *b)
{
	const struct ip_set_hash *x = a->data;
	const struct ip_set_hash *y = b->data;

	/* Resizing changes htable_bits, so we ignore it */
	return x->maxelem == y->maxelem &&
	       x->timeout == y->timeout;
}

/* The type variant functions: IPv6 */

struct hash_net6_elem {
	union nf_inet_addr ip;
	u16 padding0;
	u8 padding1;
	u8 cidr;
};

struct hash_net6_telem {
	union nf_inet_addr ip;
	u16 padding0;
	u8 padding1;
	u8 cidr;
	unsigned long timeout;
};

static inline bool
hash_net6_data_equal(const struct hash_net6_elem *ip1,
		     const struct hash_net6_elem *ip2,
		     u32 *multi)
{
	return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 &&
	       ip1->cidr == ip2->cidr;
}

static inline bool
hash_net6_data_isnull(const struct hash_net6_elem *elem)
{
	return elem->cidr == 0;
}

static inline void
hash_net6_data_copy(struct hash_net6_elem *dst,
		    const struct hash_net6_elem *src)
{
	dst->ip.in6 = src->ip.in6;
	dst->cidr = src->cidr;
}

static inline void
hash_net6_data_zero_out(struct hash_net6_elem *elem)
{
	elem->cidr = 0;
}

static inline void
ip6_netmask(union nf_inet_addr *ip, u8 prefix)
{
	ip->ip6[0] &= ip_set_netmask6(prefix)[0];
	ip->ip6[1] &= ip_set_netmask6(prefix)[1];
	ip->ip6[2] &= ip_set_netmask6(prefix)[2];
	ip->ip6[3] &= ip_set_netmask6(prefix)[3];
}

static inline void
hash_net6_data_netmask(struct hash_net6_elem *elem, u8 cidr)
{
	ip6_netmask(&elem->ip, cidr);
	elem->cidr = cidr;
}

static bool
hash_net6_data_list(struct sk_buff *skb, const struct hash_net6_elem *data)
{
	NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &data->ip);
	NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr);
	return 0;

nla_put_failure:
	return 1;
}

static bool
hash_net6_data_tlist(struct sk_buff *skb, const struct hash_net6_elem *data)
{
	const struct hash_net6_telem *e =
		(const struct hash_net6_telem *)data;

	NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &e->ip);
	NLA_PUT_U8(skb, IPSET_ATTR_CIDR, e->cidr);
	NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
		      htonl(ip_set_timeout_get(e->timeout)));
	return 0;

nla_put_failure:
	return 1;
}

#undef PF
#undef HOST_MASK

#define PF		6
#define HOST_MASK	128
#include <linux/netfilter/ipset/ip_set_ahash.h>

static inline void
hash_net6_data_next(struct ip_set_hash *h,
		    const struct hash_net6_elem *d)
{
}

static int
hash_net6_kadt(struct ip_set *set, const struct sk_buff *skb,
	       const struct xt_action_param *par,
	       enum ipset_adt adt, const struct ip_set_adt_opt *opt)
{
	const struct ip_set_hash *h = set->data;
	ipset_adtfn adtfn = set->variant->adt[adt];
	struct hash_net6_elem data = {
		.cidr = h->nets[0].cidr ? h->nets[0].cidr : HOST_MASK
	};

	if (data.cidr == 0)
		return -EINVAL;
	if (adt == IPSET_TEST)
		data.cidr = HOST_MASK;

	ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
	ip6_netmask(&data.ip, data.cidr);

	return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
}

static int
hash_net6_uadt(struct ip_set *set, struct nlattr *tb[],
	       enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
{
	const struct ip_set_hash *h = set->data;
	ipset_adtfn adtfn = set->variant->adt[adt];
	struct hash_net6_elem data = { .cidr = HOST_MASK };
	u32 timeout = h->timeout;
	int ret;

	if (unlikely(!tb[IPSET_ATTR_IP] ||
		     !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
		return -IPSET_ERR_PROTOCOL;
	if (unlikely(tb[IPSET_ATTR_IP_TO]))
		return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;

	if (tb[IPSET_ATTR_LINENO])
		*lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);

	ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &data.ip);
	if (ret)
		return ret;

	if (tb[IPSET_ATTR_CIDR])
		data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);

	if (!data.cidr)
		return -IPSET_ERR_INVALID_CIDR;

	ip6_netmask(&data.ip, data.cidr);

	if (tb[IPSET_ATTR_TIMEOUT]) {
		if (!with_timeout(h->timeout))
			return -IPSET_ERR_TIMEOUT;
		timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
	}

	ret = adtfn(set, &data, timeout, flags);

	return ip_set_eexist(ret, flags) ? 0 : ret;
}

/* Create hash:ip type of sets */

static int
hash_net_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
{
	u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
	struct ip_set_hash *h;
	u8 hbits;

	if (!(set->family == AF_INET || set->family == AF_INET6))
		return -IPSET_ERR_INVALID_FAMILY;

	if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) ||
		     !ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) ||
		     !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
		return -IPSET_ERR_PROTOCOL;

	if (tb[IPSET_ATTR_HASHSIZE]) {
		hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]);
		if (hashsize < IPSET_MIMINAL_HASHSIZE)
			hashsize = IPSET_MIMINAL_HASHSIZE;
	}

	if (tb[IPSET_ATTR_MAXELEM])
		maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]);

	h = kzalloc(sizeof(*h)
		    + sizeof(struct ip_set_hash_nets)
		      * (set->family == AF_INET ? 32 : 128), GFP_KERNEL);
	if (!h)
		return -ENOMEM;

	h->maxelem = maxelem;
	get_random_bytes(&h->initval, sizeof(h->initval));
	h->timeout = IPSET_NO_TIMEOUT;

	hbits = htable_bits(hashsize);
	h->table = ip_set_alloc(
			sizeof(struct htable)
			+ jhash_size(hbits) * sizeof(struct hbucket));
	if (!h->table) {
		kfree(h);
		return -ENOMEM;
	}
	h->table->htable_bits = hbits;

	set->data = h;

	if (tb[IPSET_ATTR_TIMEOUT]) {
		h->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);

		set->variant = set->family == AF_INET
			? &hash_net4_tvariant : &hash_net6_tvariant;

		if (set->family == AF_INET)
			hash_net4_gc_init(set);
		else
			hash_net6_gc_init(set);
	} else {
		set->variant = set->family == AF_INET
			? &hash_net4_variant : &hash_net6_variant;
	}

	pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n",
		 set->name, jhash_size(h->table->htable_bits),
		 h->table->htable_bits, h->maxelem, set->data, h->table);

	return 0;
}

static struct ip_set_type hash_net_type __read_mostly = {
	.name		= "hash:net",
	.protocol	= IPSET_PROTOCOL,
	.features	= IPSET_TYPE_IP,
	.dimension	= IPSET_DIM_ONE,
	.family		= AF_UNSPEC,
	.revision_min	= 0,
	.revision_max	= 1,	/* Range as input support for IPv4 added */
	.create		= hash_net_create,
	.create_policy	= {
		[IPSET_ATTR_HASHSIZE]	= { .type = NLA_U32 },
		[IPSET_ATTR_MAXELEM]	= { .type = NLA_U32 },
		[IPSET_ATTR_PROBES]	= { .type = NLA_U8 },
		[IPSET_ATTR_RESIZE]	= { .type = NLA_U8  },
		[IPSET_ATTR_TIMEOUT]	= { .type = NLA_U32 },
	},
	.adt_policy	= {
		[IPSET_ATTR_IP]		= { .type = NLA_NESTED },
		[IPSET_ATTR_IP_TO]	= { .type = NLA_NESTED },
		[IPSET_ATTR_CIDR]	= { .type = NLA_U8 },
		[IPSET_ATTR_TIMEOUT]	= { .type = NLA_U32 },
	},
	.me		= THIS_MODULE,
};

static int __init
hash_net_init(void)
{
	return ip_set_type_register(&hash_net_type);
}

static void __exit
hash_net_fini(void)
{
	ip_set_type_unregister(&hash_net_type);
}

module_init(hash_net_init);
module_exit(hash_net_fini);
Commit	Line	Data
b3837029 JK	1	/* Copyright (C) 2003-2011 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
	2	*
	3	* This program is free software; you can redistribute it and/or modify
	4	* it under the terms of the GNU General Public License version 2 as
	5	* published by the Free Software Foundation.
	6	*/
	7
	8	/* Kernel module implementing an IP set type: the hash:net type */
	9
	10	#include <linux/jhash.h>
	11	#include <linux/module.h>
	12	#include <linux/ip.h>
	13	#include <linux/skbuff.h>
	14	#include <linux/errno.h>
b3837029 JK	15	#include <linux/random.h>
	16	#include <net/ip.h>
	17	#include <net/ipv6.h>
	18	#include <net/netlink.h>
	19
	20	#include <linux/netfilter.h>
	21	#include <linux/netfilter/ipset/pfxlen.h>
	22	#include <linux/netfilter/ipset/ip_set.h>
	23	#include <linux/netfilter/ipset/ip_set_timeout.h>
	24	#include <linux/netfilter/ipset/ip_set_hash.h>
	25
	26	MODULE_LICENSE("GPL");
	27	MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
	28	MODULE_DESCRIPTION("hash:net type of IP sets");
	29	MODULE_ALIAS("ip_set_hash:net");
	30
	31	/* Type specific function prefix */
	32	#define TYPE hash_net
	33
	34	static bool
	35	hash_net_same_set(const struct ip_set a, const struct ip_set b);
	36
	37	#define hash_net4_same_set hash_net_same_set
	38	#define hash_net6_same_set hash_net_same_set
	39
	40	/* The type variant functions: IPv4 */
	41
	42	/* Member elements without timeout */
	43	struct hash_net4_elem {
	44	__be32 ip;
	45	u16 padding0;
	46	u8 padding1;
	47	u8 cidr;
	48	};
	49
	50	/* Member elements with timeout support */
	51	struct hash_net4_telem {
	52	__be32 ip;
	53	u16 padding0;
	54	u8 padding1;
	55	u8 cidr;
	56	unsigned long timeout;
	57	};
	58
	59	static inline bool
	60	hash_net4_data_equal(const struct hash_net4_elem *ip1,
89dc79b7 JK	61	const struct hash_net4_elem *ip2,
89dc79b7 JK	62	u32 *multi)
b3837029 JK	63	{
	64	return ip1->ip == ip2->ip && ip1->cidr == ip2->cidr;
	65	}
	66
	67	static inline bool
	68	hash_net4_data_isnull(const struct hash_net4_elem *elem)
	69	{
	70	return elem->cidr == 0;
	71	}
	72
	73	static inline void
	74	hash_net4_data_copy(struct hash_net4_elem *dst,
	75	const struct hash_net4_elem *src)
	76	{
	77	dst->ip = src->ip;
	78	dst->cidr = src->cidr;
	79	}
	80
	81	static inline void
	82	hash_net4_data_netmask(struct hash_net4_elem *elem, u8 cidr)
	83	{
	84	elem->ip &= ip_set_netmask(cidr);
	85	elem->cidr = cidr;
	86	}
	87
	88	/* Zero CIDR values cannot be stored */
	89	static inline void
	90	hash_net4_data_zero_out(struct hash_net4_elem *elem)
	91	{
	92	elem->cidr = 0;
	93	}
	94
	95	static bool
	96	hash_net4_data_list(struct sk_buff skb, const struct hash_net4_elem data)
	97	{
	98	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, data->ip);
	99	NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr);
	100	return 0;
	101
	102	nla_put_failure:
	103	return 1;
	104	}
	105
	106	static bool
	107	hash_net4_data_tlist(struct sk_buff skb, const struct hash_net4_elem data)
	108	{
	109	const struct hash_net4_telem *tdata =
	110	(const struct hash_net4_telem *)data;
	111
	112	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, tdata->ip);
	113	NLA_PUT_U8(skb, IPSET_ATTR_CIDR, tdata->cidr);
	114	NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
	115	htonl(ip_set_timeout_get(tdata->timeout)));
	116
	117	return 0;
	118
	119	nla_put_failure:
	120	return 1;
	121	}
	122
	123	#define IP_SET_HASH_WITH_NETS
	124
	125	#define PF 4
	126	#define HOST_MASK 32
127	#include <linux/netfilter/ipset/ip_set_ahash.h>
128
3d14b171 JK	129	static inline void
	130	hash_net4_data_next(struct ip_set_hash *h,
	131	const struct hash_net4_elem *d)
	132	{
d0d9e0a5	133	h->next.ip = ntohl(d->ip);
3d14b171 JK	134	}
3d14b171 JK	135
b3837029 JK	136	static int
b3837029 JK	137	hash_net4_kadt(struct ip_set set, const struct sk_buff skb,
b66554cf	138	const struct xt_action_param *par,
ac8cc925	139	enum ipset_adt adt, const struct ip_set_adt_opt *opt)
b3837029 JK	140	{
	141	const struct ip_set_hash *h = set->data;
	142	ipset_adtfn adtfn = set->variant->adt[adt];
9b03a5ef JK	143	struct hash_net4_elem data = {
	144	.cidr = h->nets[0].cidr ? h->nets[0].cidr : HOST_MASK
	145	};
b3837029 JK	146
	147	if (data.cidr == 0)
	148	return -EINVAL;
	149	if (adt == IPSET_TEST)
	150	data.cidr = HOST_MASK;
	151
ac8cc925	152	ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip);
b3837029 JK	153	data.ip &= ip_set_netmask(data.cidr);
b3837029 JK	154
ac8cc925	155	return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
b3837029 JK	156	}
	157
	158	static int
	159	hash_net4_uadt(struct ip_set set, struct nlattr tb[],
3d14b171	160	enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
b3837029 JK	161	{
	162	const struct ip_set_hash *h = set->data;
	163	ipset_adtfn adtfn = set->variant->adt[adt];
	164	struct hash_net4_elem data = { .cidr = HOST_MASK };
	165	u32 timeout = h->timeout;
d0d9e0a5	166	u32 ip = 0, ip_to, last;
b3837029 JK	167	int ret;
	168
	169	if (unlikely(!tb[IPSET_ATTR_IP] \|\|
	170	!ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
	171	return -IPSET_ERR_PROTOCOL;
	172
	173	if (tb[IPSET_ATTR_LINENO])
	174	*lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
	175
d0d9e0a5	176	ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip);
b3837029 JK	177	if (ret)
	178	return ret;
	179
d0d9e0a5	180	if (tb[IPSET_ATTR_CIDR]) {
b3837029	181	data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
d0d9e0a5 JK	182	if (!data.cidr)
	183	return -IPSET_ERR_INVALID_CIDR;
	184	}
b3837029 JK	185
	186	if (tb[IPSET_ATTR_TIMEOUT]) {
	187	if (!with_timeout(h->timeout))
	188	return -IPSET_ERR_TIMEOUT;
	189	timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
	190	}
15b4d93f	191
d0d9e0a5 JK	192	if (adt == IPSET_TEST \|\| !tb[IPSET_ATTR_IP_TO]) {
	193	data.ip = htonl(ip & ip_set_hostmask(data.cidr));
	194	ret = adtfn(set, &data, timeout, flags);
	195	return ip_set_eexist(ret, flags) ? 0 : ret;
	196	}
b3837029	197
d0d9e0a5 JK	198	ip_to = ip;
	199	if (tb[IPSET_ATTR_IP_TO]) {
	200	ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
	201	if (ret)
	202	return ret;
	203	if (ip_to < ip)
	204	swap(ip, ip_to);
	205	if (ip + UINT_MAX == ip_to)
	206	return -IPSET_ERR_HASH_RANGE;
	207	}
	208	if (retried)
15b4d93f	209	ip = h->next.ip;
d0d9e0a5 JK	210	while (!after(ip, ip_to)) {
	211	data.ip = htonl(ip);
	212	last = ip_set_range_to_cidr(ip, ip_to, &data.cidr);
	213	ret = adtfn(set, &data, timeout, flags);
	214	if (ret && !ip_set_eexist(ret, flags))
	215	return ret;
	216	else
	217	ret = 0;
	218	ip = last + 1;
	219	}
	220	return ret;
b3837029 JK	221	}
	222
	223	static bool
	224	hash_net_same_set(const struct ip_set a, const struct ip_set b)
	225	{
	226	const struct ip_set_hash *x = a->data;
	227	const struct ip_set_hash *y = b->data;
	228
	229	/* Resizing changes htable_bits, so we ignore it */
	230	return x->maxelem == y->maxelem &&
	231	x->timeout == y->timeout;
	232	}
	233
	234	/* The type variant functions: IPv6 */
	235
	236	struct hash_net6_elem {
	237	union nf_inet_addr ip;
	238	u16 padding0;
	239	u8 padding1;
	240	u8 cidr;
	241	};
	242
	243	struct hash_net6_telem {
	244	union nf_inet_addr ip;
	245	u16 padding0;
	246	u8 padding1;
	247	u8 cidr;
	248	unsigned long timeout;
	249	};
	250
	251	static inline bool
	252	hash_net6_data_equal(const struct hash_net6_elem *ip1,
89dc79b7 JK	253	const struct hash_net6_elem *ip2,
89dc79b7 JK	254	u32 *multi)
b3837029 JK	255	{
	256	return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 &&
	257	ip1->cidr == ip2->cidr;
	258	}
	259
	260	static inline bool
	261	hash_net6_data_isnull(const struct hash_net6_elem *elem)
	262	{
	263	return elem->cidr == 0;
	264	}
	265
	266	static inline void
	267	hash_net6_data_copy(struct hash_net6_elem *dst,
	268	const struct hash_net6_elem *src)
	269	{
4e3fd7a0	270	dst->ip.in6 = src->ip.in6;
b3837029 JK	271	dst->cidr = src->cidr;
	272	}
	273
	274	static inline void
	275	hash_net6_data_zero_out(struct hash_net6_elem *elem)
	276	{
	277	elem->cidr = 0;
	278	}
	279
	280	static inline void
	281	ip6_netmask(union nf_inet_addr *ip, u8 prefix)
	282	{
	283	ip->ip6[0] &= ip_set_netmask6(prefix)[0];
	284	ip->ip6[1] &= ip_set_netmask6(prefix)[1];
	285	ip->ip6[2] &= ip_set_netmask6(prefix)[2];
	286	ip->ip6[3] &= ip_set_netmask6(prefix)[3];
	287	}
	288
	289	static inline void
	290	hash_net6_data_netmask(struct hash_net6_elem *elem, u8 cidr)
	291	{
	292	ip6_netmask(&elem->ip, cidr);
	293	elem->cidr = cidr;
	294	}
	295
	296	static bool
	297	hash_net6_data_list(struct sk_buff skb, const struct hash_net6_elem data)
	298	{
	299	NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &data->ip);
	300	NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr);
	301	return 0;
	302
	303	nla_put_failure:
	304	return 1;
	305	}
	306
	307	static bool
	308	hash_net6_data_tlist(struct sk_buff skb, const struct hash_net6_elem data)
	309	{
	310	const struct hash_net6_telem *e =
	311	(const struct hash_net6_telem *)data;
	312
	313	NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &e->ip);
	314	NLA_PUT_U8(skb, IPSET_ATTR_CIDR, e->cidr);
	315	NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
	316	htonl(ip_set_timeout_get(e->timeout)));
	317	return 0;
	318
	319	nla_put_failure:
	320	return 1;
	321	}
	322
	323	#undef PF
	324	#undef HOST_MASK
	325
	326	#define PF 6
	327	#define HOST_MASK 128
	328	#include <linux/netfilter/ipset/ip_set_ahash.h>
	329
3d14b171 JK	330	static inline void
	331	hash_net6_data_next(struct ip_set_hash *h,
	332	const struct hash_net6_elem *d)
	333	{
	334	}
	335
b3837029 JK	336	static int
b3837029 JK	337	hash_net6_kadt(struct ip_set set, const struct sk_buff skb,
b66554cf	338	const struct xt_action_param *par,
ac8cc925	339	enum ipset_adt adt, const struct ip_set_adt_opt *opt)
b3837029 JK	340	{
	341	const struct ip_set_hash *h = set->data;
	342	ipset_adtfn adtfn = set->variant->adt[adt];
9b03a5ef JK	343	struct hash_net6_elem data = {
	344	.cidr = h->nets[0].cidr ? h->nets[0].cidr : HOST_MASK
	345	};
b3837029 JK	346
	347	if (data.cidr == 0)
	348	return -EINVAL;
	349	if (adt == IPSET_TEST)
	350	data.cidr = HOST_MASK;
	351
ac8cc925	352	ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
b3837029 JK	353	ip6_netmask(&data.ip, data.cidr);
b3837029 JK	354
ac8cc925	355	return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
b3837029 JK	356	}
	357
	358	static int
	359	hash_net6_uadt(struct ip_set set, struct nlattr tb[],
3d14b171	360	enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
b3837029 JK	361	{
	362	const struct ip_set_hash *h = set->data;
	363	ipset_adtfn adtfn = set->variant->adt[adt];
	364	struct hash_net6_elem data = { .cidr = HOST_MASK };
	365	u32 timeout = h->timeout;
	366	int ret;
	367
	368	if (unlikely(!tb[IPSET_ATTR_IP] \|\|
	369	!ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
	370	return -IPSET_ERR_PROTOCOL;
d0d9e0a5 JK	371	if (unlikely(tb[IPSET_ATTR_IP_TO]))
d0d9e0a5 JK	372	return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
b3837029 JK	373
	374	if (tb[IPSET_ATTR_LINENO])
	375	*lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
	376
	377	ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &data.ip);
	378	if (ret)
	379	return ret;
	380
	381	if (tb[IPSET_ATTR_CIDR])
	382	data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
	383
	384	if (!data.cidr)
	385	return -IPSET_ERR_INVALID_CIDR;
	386
	387	ip6_netmask(&data.ip, data.cidr);
	388
	389	if (tb[IPSET_ATTR_TIMEOUT]) {
	390	if (!with_timeout(h->timeout))
	391	return -IPSET_ERR_TIMEOUT;
	392	timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
	393	}
	394
5416219e	395	ret = adtfn(set, &data, timeout, flags);
b3837029 JK	396
	397	return ip_set_eexist(ret, flags) ? 0 : ret;
	398	}
	399
	400	/* Create hash:ip type of sets */
	401
	402	static int
	403	hash_net_create(struct ip_set set, struct nlattr tb[], u32 flags)
	404	{
	405	u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
	406	struct ip_set_hash *h;
	407	u8 hbits;
	408
	409	if (!(set->family == AF_INET \|\| set->family == AF_INET6))
	410	return -IPSET_ERR_INVALID_FAMILY;
	411
	412	if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) \|\|
	413	!ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) \|\|
	414	!ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
	415	return -IPSET_ERR_PROTOCOL;
	416
	417	if (tb[IPSET_ATTR_HASHSIZE]) {
	418	hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]);
	419	if (hashsize < IPSET_MIMINAL_HASHSIZE)
	420	hashsize = IPSET_MIMINAL_HASHSIZE;
	421	}
	422
	423	if (tb[IPSET_ATTR_MAXELEM])
	424	maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]);
	425
	426	h = kzalloc(sizeof(*h)
	427	+ sizeof(struct ip_set_hash_nets)
	428	* (set->family == AF_INET ? 32 : 128), GFP_KERNEL);
	429	if (!h)
	430	return -ENOMEM;
	431
	432	h->maxelem = maxelem;
	433	get_random_bytes(&h->initval, sizeof(h->initval));
	434	h->timeout = IPSET_NO_TIMEOUT;
	435
	436	hbits = htable_bits(hashsize);
	437	h->table = ip_set_alloc(
	438	sizeof(struct htable)
	439	+ jhash_size(hbits) * sizeof(struct hbucket));
	440	if (!h->table) {
	441	kfree(h);
	442	return -ENOMEM;
	443	}
	444	h->table->htable_bits = hbits;
	445
	446	set->data = h;
	447
	448	if (tb[IPSET_ATTR_TIMEOUT]) {
	449	h->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
	450
	451	set->variant = set->family == AF_INET
	452	? &hash_net4_tvariant : &hash_net6_tvariant;
	453
	454	if (set->family == AF_INET)
	455	hash_net4_gc_init(set);
	456	else
	457	hash_net6_gc_init(set);
	458	} else {
	459	set->variant = set->family == AF_INET
460	? &hash_net4_variant : &hash_net6_variant;
461	}
462
463	pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n",
464	set->name, jhash_size(h->table->htable_bits),
465	h->table->htable_bits, h->maxelem, set->data, h->table);
466
467	return 0;
468	}
469
470	static struct ip_set_type hash_net_type __read_mostly = {
471	.name = "hash:net",
472	.protocol = IPSET_PROTOCOL,
473	.features = IPSET_TYPE_IP,
474	.dimension = IPSET_DIM_ONE,
475	.family = AF_UNSPEC,
f1e00b39	476	.revision_min = 0,
d0d9e0a5	477	.revision_max = 1, /* Range as input support for IPv4 added */
b3837029 JK	478	.create = hash_net_create,
	479	.create_policy = {
	480	[IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
	481	[IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
	482	[IPSET_ATTR_PROBES] = { .type = NLA_U8 },
	483	[IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
	484	[IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
	485	},
	486	.adt_policy = {
	487	[IPSET_ATTR_IP] = { .type = NLA_NESTED },
d0d9e0a5	488	[IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
b3837029 JK	489	[IPSET_ATTR_CIDR] = { .type = NLA_U8 },
	490	[IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
	491	},
	492	.me = THIS_MODULE,
	493	};
	494
	495	static int __init
	496	hash_net_init(void)
	497	{
	498	return ip_set_type_register(&hash_net_type);
	499	}
	500
	501	static void __exit
	502	hash_net_fini(void)
	503	{
	504	ip_set_type_unregister(&hash_net_type);
	505	}
	506
	507	module_init(hash_net_init);
	508	module_exit(hash_net_fini);