[mirror_ubuntu-zesty-kernel.git] / net / netfilter / ipset / ip_set_bitmap_ip.c

/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
 *                         Patrick Schaaf <bof@bof.de>
 * Copyright (C) 2003-2013 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 bitmap:ip type */

#include <linux/module.h>
#include <linux/ip.h>
#include <linux/skbuff.h>
#include <linux/errno.h>
#include <linux/bitops.h>
#include <linux/spinlock.h>
#include <linux/netlink.h>
#include <linux/jiffies.h>
#include <linux/timer.h>
#include <net/netlink.h>
#include <net/tcp.h>

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

#define IPSET_TYPE_REV_MIN	0
#define IPSET_TYPE_REV_MAX	1	/* Counter support added */

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
IP_SET_MODULE_DESC("bitmap:ip", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
MODULE_ALIAS("ip_set_bitmap:ip");

#define MTYPE		bitmap_ip

/* Type structure */
struct bitmap_ip {
	void *members;		/* the set members */
	void *extensions;	/* data extensions */
	u32 first_ip;		/* host byte order, included in range */
	u32 last_ip;		/* host byte order, included in range */
	u32 elements;		/* number of max elements in the set */
	u32 hosts;		/* number of hosts in a subnet */
	size_t memsize;		/* members size */
	size_t dsize;		/* extensions struct size */
	size_t offset[IPSET_OFFSET_MAX]; /* Offsets to extensions */
	u8 netmask;		/* subnet netmask */
	u32 timeout;		/* timeout parameter */
	struct timer_list gc;	/* garbage collection */
};

/* ADT structure for generic function args */
struct bitmap_ip_adt_elem {
	u16 id;
};

static inline u32
ip_to_id(const struct bitmap_ip *m, u32 ip)
{
	return ((ip & ip_set_hostmask(m->netmask)) - m->first_ip)/m->hosts;
}

/* Common functions */

static inline int
bitmap_ip_do_test(const struct bitmap_ip_adt_elem *e, struct bitmap_ip *map)
{
	return !!test_bit(e->id, map->members);
}

static inline int
bitmap_ip_gc_test(u16 id, const struct bitmap_ip *map)
{
	return !!test_bit(id, map->members);
}

static inline int
bitmap_ip_do_add(const struct bitmap_ip_adt_elem *e, struct bitmap_ip *map,
		 u32 flags)
{
	return !!test_and_set_bit(e->id, map->members);
}

static inline int
bitmap_ip_do_del(const struct bitmap_ip_adt_elem *e, struct bitmap_ip *map)
{
	return !test_and_clear_bit(e->id, map->members);
}

static inline int
bitmap_ip_do_list(struct sk_buff *skb, const struct bitmap_ip *map, u32 id)
{
	return nla_put_ipaddr4(skb, IPSET_ATTR_IP,
			htonl(map->first_ip + id * map->hosts));
}

static inline int
bitmap_ip_do_head(struct sk_buff *skb, const struct bitmap_ip *map)
{
	return nla_put_ipaddr4(skb, IPSET_ATTR_IP, htonl(map->first_ip)) ||
	       nla_put_ipaddr4(skb, IPSET_ATTR_IP_TO, htonl(map->last_ip)) ||
	       (map->netmask != 32 &&
		nla_put_u8(skb, IPSET_ATTR_NETMASK, map->netmask));
}

static int
bitmap_ip_kadt(struct ip_set *set, const struct sk_buff *skb,
	       const struct xt_action_param *par,
	       enum ipset_adt adt, struct ip_set_adt_opt *opt)
{
	struct bitmap_ip *map = set->data;
	ipset_adtfn adtfn = set->variant->adt[adt];
	struct bitmap_ip_adt_elem e = { };
	struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, map);
	u32 ip;

	ip = ntohl(ip4addr(skb, opt->flags & IPSET_DIM_ONE_SRC));
	if (ip < map->first_ip || ip > map->last_ip)
		return -IPSET_ERR_BITMAP_RANGE;

	e.id = ip_to_id(map, ip);

	return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
}

static int
bitmap_ip_uadt(struct ip_set *set, struct nlattr *tb[],
	       enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
{
	struct bitmap_ip *map = set->data;
	ipset_adtfn adtfn = set->variant->adt[adt];
	u32 ip = 0, ip_to = 0;
	struct bitmap_ip_adt_elem e = { };
	struct ip_set_ext ext = IP_SET_INIT_UEXT(map);
	int ret = 0;

	if (unlikely(!tb[IPSET_ATTR_IP] ||
		     !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
		     !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
		     !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES)))
		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) ||
	      ip_set_get_extensions(set, tb, &ext);
	if (ret)
		return ret;

	if (ip < map->first_ip || ip > map->last_ip)
		return -IPSET_ERR_BITMAP_RANGE;

	if (adt == IPSET_TEST) {
		e.id = ip_to_id(map, ip);
		return adtfn(set, &e, &ext, &ext, flags);
	}

	if (tb[IPSET_ATTR_IP_TO]) {
		ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
		if (ret)
			return ret;
		if (ip > ip_to) {
			swap(ip, ip_to);
			if (ip < map->first_ip)
				return -IPSET_ERR_BITMAP_RANGE;
		}
	} else if (tb[IPSET_ATTR_CIDR]) {
		u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);

		if (!cidr || cidr > 32)
			return -IPSET_ERR_INVALID_CIDR;
		ip_set_mask_from_to(ip, ip_to, cidr);
	} else
		ip_to = ip;

	if (ip_to > map->last_ip)
		return -IPSET_ERR_BITMAP_RANGE;

	for (; !before(ip_to, ip); ip += map->hosts) {
		e.id = ip_to_id(map, ip);
		ret = adtfn(set, &e, &ext, &ext, flags);

		if (ret && !ip_set_eexist(ret, flags))
			return ret;
		else
			ret = 0;
	}
	return ret;
}

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

	return x->first_ip == y->first_ip &&
	       x->last_ip == y->last_ip &&
	       x->netmask == y->netmask &&
	       x->timeout == y->timeout &&
	       a->extensions == b->extensions;
}

/* Plain variant */

struct bitmap_ip_elem {
};

/* Timeout variant */

struct bitmap_ipt_elem {
	unsigned long timeout;
};

/* Plain variant with counter */

struct bitmap_ipc_elem {
	struct ip_set_counter counter;
};

/* Timeout variant with counter */

struct bitmap_ipct_elem {
	unsigned long timeout;
	struct ip_set_counter counter;
};

#include "ip_set_bitmap_gen.h"

/* Create bitmap:ip type of sets */

static bool
init_map_ip(struct ip_set *set, struct bitmap_ip *map,
	    u32 first_ip, u32 last_ip,
	    u32 elements, u32 hosts, u8 netmask)
{
	map->members = ip_set_alloc(map->memsize);
	if (!map->members)
		return false;
	if (map->dsize) {
		map->extensions = ip_set_alloc(map->dsize * elements);
		if (!map->extensions) {
			kfree(map->members);
			return false;
		}
	}
	map->first_ip = first_ip;
	map->last_ip = last_ip;
	map->elements = elements;
	map->hosts = hosts;
	map->netmask = netmask;
	map->timeout = IPSET_NO_TIMEOUT;

	set->data = map;
	set->family = NFPROTO_IPV4;

	return true;
}

static int
bitmap_ip_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
{
	struct bitmap_ip *map;
	u32 first_ip = 0, last_ip = 0, hosts, cadt_flags = 0;
	u64 elements;
	u8 netmask = 32;
	int ret;

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

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

	if (tb[IPSET_ATTR_IP_TO]) {
		ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &last_ip);
		if (ret)
			return ret;
		if (first_ip > last_ip) {
			u32 tmp = first_ip;

			first_ip = last_ip;
			last_ip = tmp;
		}
	} else if (tb[IPSET_ATTR_CIDR]) {
		u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);

		if (cidr >= 32)
			return -IPSET_ERR_INVALID_CIDR;
		ip_set_mask_from_to(first_ip, last_ip, cidr);
	} else
		return -IPSET_ERR_PROTOCOL;

	if (tb[IPSET_ATTR_NETMASK]) {
		netmask = nla_get_u8(tb[IPSET_ATTR_NETMASK]);

		if (netmask > 32)
			return -IPSET_ERR_INVALID_NETMASK;

		first_ip &= ip_set_hostmask(netmask);
		last_ip |= ~ip_set_hostmask(netmask);
	}

	if (netmask == 32) {
		hosts = 1;
		elements = (u64)last_ip - first_ip + 1;
	} else {
		u8 mask_bits;
		u32 mask;

		mask = range_to_mask(first_ip, last_ip, &mask_bits);

		if ((!mask && (first_ip || last_ip != 0xFFFFFFFF)) ||
		    netmask <= mask_bits)
			return -IPSET_ERR_BITMAP_RANGE;

		pr_debug("mask_bits %u, netmask %u\n", mask_bits, netmask);
		hosts = 2 << (32 - netmask - 1);
		elements = 2 << (netmask - mask_bits - 1);
	}
	if (elements > IPSET_BITMAP_MAX_RANGE + 1)
		return -IPSET_ERR_BITMAP_RANGE_SIZE;

	pr_debug("hosts %u, elements %llu\n",
		 hosts, (unsigned long long)elements);

	map = kzalloc(sizeof(*map), GFP_KERNEL);
	if (!map)
		return -ENOMEM;

	map->memsize = bitmap_bytes(0, elements - 1);
	set->variant = &bitmap_ip;
	if (tb[IPSET_ATTR_CADT_FLAGS])
		cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
	if (cadt_flags & IPSET_FLAG_WITH_COUNTERS) {
		set->extensions |= IPSET_EXT_COUNTER;
		if (tb[IPSET_ATTR_TIMEOUT]) {
			map->dsize = sizeof(struct bitmap_ipct_elem);
			map->offset[IPSET_OFFSET_TIMEOUT] =
				offsetof(struct bitmap_ipct_elem, timeout);
			map->offset[IPSET_OFFSET_COUNTER] =
				offsetof(struct bitmap_ipct_elem, counter);

			if (!init_map_ip(set, map, first_ip, last_ip,
					 elements, hosts, netmask)) {
				kfree(map);
				return -ENOMEM;
			}

			map->timeout = ip_set_timeout_uget(
				tb[IPSET_ATTR_TIMEOUT]);
			set->extensions |= IPSET_EXT_TIMEOUT;

			bitmap_ip_gc_init(set, bitmap_ip_gc);
		} else {
			map->dsize = sizeof(struct bitmap_ipc_elem);
			map->offset[IPSET_OFFSET_COUNTER] =
				offsetof(struct bitmap_ipc_elem, counter);

			if (!init_map_ip(set, map, first_ip, last_ip,
					 elements, hosts, netmask)) {
				kfree(map);
				return -ENOMEM;
			}
		}
	} else if (tb[IPSET_ATTR_TIMEOUT]) {
		map->dsize = sizeof(struct bitmap_ipt_elem);
		map->offset[IPSET_OFFSET_TIMEOUT] =
			offsetof(struct bitmap_ipt_elem, timeout);

		if (!init_map_ip(set, map, first_ip, last_ip,
				 elements, hosts, netmask)) {
			kfree(map);
			return -ENOMEM;
		}

		map->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
		set->extensions |= IPSET_EXT_TIMEOUT;

		bitmap_ip_gc_init(set, bitmap_ip_gc);
	} else {
		map->dsize = 0;
		if (!init_map_ip(set, map, first_ip, last_ip,
				 elements, hosts, netmask)) {
			kfree(map);
			return -ENOMEM;
		}
	}
	return 0;
}

static struct ip_set_type bitmap_ip_type __read_mostly = {
	.name		= "bitmap:ip",
	.protocol	= IPSET_PROTOCOL,
	.features	= IPSET_TYPE_IP,
	.dimension	= IPSET_DIM_ONE,
	.family		= NFPROTO_IPV4,
	.revision_min	= IPSET_TYPE_REV_MIN,
	.revision_max	= IPSET_TYPE_REV_MAX,
	.create		= bitmap_ip_create,
	.create_policy	= {
		[IPSET_ATTR_IP]		= { .type = NLA_NESTED },
		[IPSET_ATTR_IP_TO]	= { .type = NLA_NESTED },
		[IPSET_ATTR_CIDR]	= { .type = NLA_U8 },
		[IPSET_ATTR_NETMASK]	= { .type = NLA_U8  },
		[IPSET_ATTR_TIMEOUT]	= { .type = NLA_U32 },
		[IPSET_ATTR_CADT_FLAGS]	= { .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 },
		[IPSET_ATTR_LINENO]	= { .type = NLA_U32 },
		[IPSET_ATTR_BYTES]	= { .type = NLA_U64 },
		[IPSET_ATTR_PACKETS]	= { .type = NLA_U64 },
	},
	.me		= THIS_MODULE,
};

static int __init
bitmap_ip_init(void)
{
	return ip_set_type_register(&bitmap_ip_type);
}

static void __exit
bitmap_ip_fini(void)
{
	ip_set_type_unregister(&bitmap_ip_type);
}

module_init(bitmap_ip_init);
module_exit(bitmap_ip_fini);
Commit	Line	Data
72205fc6 JK	1	/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
72205fc6 JK	2	* Patrick Schaaf <bof@bof.de>
b0da3905	3	* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
72205fc6 JK	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	/* Kernel module implementing an IP set type: the bitmap:ip type */
	11
	12	#include <linux/module.h>
	13	#include <linux/ip.h>
	14	#include <linux/skbuff.h>
	15	#include <linux/errno.h>
72205fc6 JK	16	#include <linux/bitops.h>
	17	#include <linux/spinlock.h>
	18	#include <linux/netlink.h>
	19	#include <linux/jiffies.h>
	20	#include <linux/timer.h>
	21	#include <net/netlink.h>
	22	#include <net/tcp.h>
	23
	24	#include <linux/netfilter/ipset/pfxlen.h>
	25	#include <linux/netfilter/ipset/ip_set.h>
	26	#include <linux/netfilter/ipset/ip_set_bitmap.h>
72205fc6	27
35b8dcf8 JK	28	#define IPSET_TYPE_REV_MIN 0
35b8dcf8 JK	29	#define IPSET_TYPE_REV_MAX 1 /* Counter support added */
10111a6e	30
72205fc6 JK	31	MODULE_LICENSE("GPL");
72205fc6 JK	32	MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
35b8dcf8	33	IP_SET_MODULE_DESC("bitmap:ip", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
72205fc6 JK	34	MODULE_ALIAS("ip_set_bitmap:ip");
72205fc6 JK	35
b0da3905 JK	36	#define MTYPE bitmap_ip
b0da3905 JK	37
72205fc6 JK	38	/* Type structure */
	39	struct bitmap_ip {
	40	void members; / the set members */
b0da3905	41	void extensions; / data extensions */
72205fc6 JK	42	u32 first_ip; /* host byte order, included in range */
	43	u32 last_ip; /* host byte order, included in range */
	44	u32 elements; /* number of max elements in the set */
	45	u32 hosts; /* number of hosts in a subnet */
	46	size_t memsize; /* members size */
b0da3905 JK	47	size_t dsize; /* extensions struct size */
b0da3905 JK	48	size_t offset[IPSET_OFFSET_MAX]; /* Offsets to extensions */
72205fc6 JK	49	u8 netmask; /* subnet netmask */
	50	u32 timeout; /* timeout parameter */
	51	struct timer_list gc; /* garbage collection */
	52	};
	53
b0da3905 JK	54	/* ADT structure for generic function args */
	55	struct bitmap_ip_adt_elem {
	56	u16 id;
	57	};
72205fc6 JK	58
	59	static inline u32
	60	ip_to_id(const struct bitmap_ip *m, u32 ip)
	61	{
	62	return ((ip & ip_set_hostmask(m->netmask)) - m->first_ip)/m->hosts;
	63	}
	64
b0da3905	65	/* Common functions */
72205fc6	66
b0da3905 JK	67	static inline int
b0da3905 JK	68	bitmap_ip_do_test(const struct bitmap_ip_adt_elem e, struct bitmap_ip map)
72205fc6	69	{
b0da3905	70	return !!test_bit(e->id, map->members);
72205fc6 JK	71	}
72205fc6 JK	72
b0da3905 JK	73	static inline int
b0da3905 JK	74	bitmap_ip_gc_test(u16 id, const struct bitmap_ip *map)
72205fc6	75	{
b0da3905	76	return !!test_bit(id, map->members);
72205fc6 JK	77	}
72205fc6 JK	78
b0da3905 JK	79	static inline int
	80	bitmap_ip_do_add(const struct bitmap_ip_adt_elem e, struct bitmap_ip map,
	81	u32 flags)
72205fc6	82	{
b0da3905	83	return !!test_and_set_bit(e->id, map->members);
72205fc6 JK	84	}
72205fc6 JK	85
b0da3905 JK	86	static inline int
b0da3905 JK	87	bitmap_ip_do_del(const struct bitmap_ip_adt_elem e, struct bitmap_ip map)
72205fc6	88	{
b0da3905	89	return !test_and_clear_bit(e->id, map->members);
72205fc6 JK	90	}
72205fc6 JK	91
b0da3905 JK	92	static inline int
b0da3905 JK	93	bitmap_ip_do_list(struct sk_buff skb, const struct bitmap_ip map, u32 id)
72205fc6	94	{
b0da3905 JK	95	return nla_put_ipaddr4(skb, IPSET_ATTR_IP,
b0da3905 JK	96	htonl(map->first_ip + id * map->hosts));
72205fc6 JK	97	}
72205fc6 JK	98
b0da3905 JK	99	static inline int
b0da3905 JK	100	bitmap_ip_do_head(struct sk_buff skb, const struct bitmap_ip map)
72205fc6	101	{
b0da3905 JK	102	return nla_put_ipaddr4(skb, IPSET_ATTR_IP, htonl(map->first_ip)) \|\|
	103	nla_put_ipaddr4(skb, IPSET_ATTR_IP_TO, htonl(map->last_ip)) \|\|
	104	(map->netmask != 32 &&
	105	nla_put_u8(skb, IPSET_ATTR_NETMASK, map->netmask));
72205fc6 JK	106	}
	107
	108	static int
	109	bitmap_ip_kadt(struct ip_set set, const struct sk_buff skb,
b66554cf	110	const struct xt_action_param *par,
b0da3905	111	enum ipset_adt adt, struct ip_set_adt_opt *opt)
72205fc6 JK	112	{
	113	struct bitmap_ip *map = set->data;
	114	ipset_adtfn adtfn = set->variant->adt[adt];
b0da3905 JK	115	struct bitmap_ip_adt_elem e = { };
b0da3905 JK	116	struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, map);
72205fc6 JK	117	u32 ip;
72205fc6 JK	118
ac8cc925	119	ip = ntohl(ip4addr(skb, opt->flags & IPSET_DIM_ONE_SRC));
72205fc6 JK	120	if (ip < map->first_ip \|\| ip > map->last_ip)
	121	return -IPSET_ERR_BITMAP_RANGE;
	122
b0da3905	123	e.id = ip_to_id(map, ip);
72205fc6	124
b0da3905	125	return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
72205fc6 JK	126	}
	127
	128	static int
	129	bitmap_ip_uadt(struct ip_set set, struct nlattr tb[],
3d14b171	130	enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
72205fc6 JK	131	{
	132	struct bitmap_ip *map = set->data;
	133	ipset_adtfn adtfn = set->variant->adt[adt];
20b2fab4	134	u32 ip = 0, ip_to = 0;
b0da3905 JK	135	struct bitmap_ip_adt_elem e = { };
b0da3905 JK	136	struct ip_set_ext ext = IP_SET_INIT_UEXT(map);
72205fc6 JK	137	int ret = 0;
	138
	139	if (unlikely(!tb[IPSET_ATTR_IP] \|\|
f48d19db JK	140	!ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) \|\|
	141	!ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) \|\|
	142	!ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES)))
72205fc6 JK	143	return -IPSET_ERR_PROTOCOL;
	144
	145	if (tb[IPSET_ATTR_LINENO])
	146	*lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
	147
b0da3905 JK	148	ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip) \|\|
b0da3905 JK	149	ip_set_get_extensions(set, tb, &ext);
72205fc6 JK	150	if (ret)
	151	return ret;
	152
	153	if (ip < map->first_ip \|\| ip > map->last_ip)
	154	return -IPSET_ERR_BITMAP_RANGE;
	155
72205fc6	156	if (adt == IPSET_TEST) {
b0da3905 JK	157	e.id = ip_to_id(map, ip);
b0da3905 JK	158	return adtfn(set, &e, &ext, &ext, flags);
72205fc6 JK	159	}
	160
	161	if (tb[IPSET_ATTR_IP_TO]) {
	162	ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
	163	if (ret)
	164	return ret;
	165	if (ip > ip_to) {
	166	swap(ip, ip_to);
	167	if (ip < map->first_ip)
	168	return -IPSET_ERR_BITMAP_RANGE;
	169	}
	170	} else if (tb[IPSET_ATTR_CIDR]) {
	171	u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
	172
b9fed748	173	if (!cidr \|\| cidr > 32)
72205fc6	174	return -IPSET_ERR_INVALID_CIDR;
e6146e86	175	ip_set_mask_from_to(ip, ip_to, cidr);
72205fc6 JK	176	} else
	177	ip_to = ip;
	178
	179	if (ip_to > map->last_ip)
	180	return -IPSET_ERR_BITMAP_RANGE;
	181
	182	for (; !before(ip_to, ip); ip += map->hosts) {
b0da3905 JK	183	e.id = ip_to_id(map, ip);
b0da3905 JK	184	ret = adtfn(set, &e, &ext, &ext, flags);
72205fc6 JK	185
	186	if (ret && !ip_set_eexist(ret, flags))
	187	return ret;
	188	else
	189	ret = 0;
	190	}
	191	return ret;
	192	}
	193
72205fc6 JK	194	static bool
	195	bitmap_ip_same_set(const struct ip_set a, const struct ip_set b)
	196	{
	197	const struct bitmap_ip *x = a->data;
	198	const struct bitmap_ip *y = b->data;
	199
	200	return x->first_ip == y->first_ip &&
	201	x->last_ip == y->last_ip &&
	202	x->netmask == y->netmask &&
b0da3905 JK	203	x->timeout == y->timeout &&
b0da3905 JK	204	a->extensions == b->extensions;
72205fc6 JK	205	}
72205fc6 JK	206
b0da3905	207	/* Plain variant */
72205fc6	208
b0da3905	209	struct bitmap_ip_elem {
72205fc6 JK	210	};
72205fc6 JK	211
b0da3905	212	/* Timeout variant */
72205fc6	213
b0da3905 JK	214	struct bitmap_ipt_elem {
	215	unsigned long timeout;
	216	};
72205fc6	217
f48d19db JK	218	/* Plain variant with counter */
	219
	220	struct bitmap_ipc_elem {
	221	struct ip_set_counter counter;
	222	};
	223
	224	/* Timeout variant with counter */
	225
	226	struct bitmap_ipct_elem {
	227	unsigned long timeout;
	228	struct ip_set_counter counter;
	229	};
	230
b0da3905	231	#include "ip_set_bitmap_gen.h"
72205fc6 JK	232
	233	/* Create bitmap:ip type of sets */
	234
	235	static bool
	236	init_map_ip(struct ip_set set, struct bitmap_ip map,
	237	u32 first_ip, u32 last_ip,
	238	u32 elements, u32 hosts, u8 netmask)
	239	{
	240	map->members = ip_set_alloc(map->memsize);
	241	if (!map->members)
	242	return false;
b0da3905 JK	243	if (map->dsize) {
	244	map->extensions = ip_set_alloc(map->dsize * elements);
	245	if (!map->extensions) {
	246	kfree(map->members);
	247	return false;
	248	}
	249	}
72205fc6 JK	250	map->first_ip = first_ip;
	251	map->last_ip = last_ip;
	252	map->elements = elements;
	253	map->hosts = hosts;
	254	map->netmask = netmask;
	255	map->timeout = IPSET_NO_TIMEOUT;
	256
	257	set->data = map;
c15f1c83	258	set->family = NFPROTO_IPV4;
72205fc6 JK	259
	260	return true;
	261	}
	262
	263	static int
	264	bitmap_ip_create(struct ip_set set, struct nlattr tb[], u32 flags)
	265	{
	266	struct bitmap_ip *map;
20b2fab4	267	u32 first_ip = 0, last_ip = 0, hosts, cadt_flags = 0;
b9fed748	268	u64 elements;
72205fc6 JK	269	u8 netmask = 32;
	270	int ret;
	271
	272	if (unlikely(!tb[IPSET_ATTR_IP] \|\|
f48d19db JK	273	!ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) \|\|
f48d19db JK	274	!ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
72205fc6 JK	275	return -IPSET_ERR_PROTOCOL;
	276
	277	ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &first_ip);
	278	if (ret)
	279	return ret;
	280
	281	if (tb[IPSET_ATTR_IP_TO]) {
	282	ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &last_ip);
	283	if (ret)
	284	return ret;
	285	if (first_ip > last_ip) {
	286	u32 tmp = first_ip;
	287
	288	first_ip = last_ip;
	289	last_ip = tmp;
	290	}
	291	} else if (tb[IPSET_ATTR_CIDR]) {
	292	u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
	293
	294	if (cidr >= 32)
	295	return -IPSET_ERR_INVALID_CIDR;
e6146e86	296	ip_set_mask_from_to(first_ip, last_ip, cidr);
72205fc6 JK	297	} else
	298	return -IPSET_ERR_PROTOCOL;
	299
	300	if (tb[IPSET_ATTR_NETMASK]) {
	301	netmask = nla_get_u8(tb[IPSET_ATTR_NETMASK]);
	302
	303	if (netmask > 32)
	304	return -IPSET_ERR_INVALID_NETMASK;
	305
	306	first_ip &= ip_set_hostmask(netmask);
	307	last_ip \|= ~ip_set_hostmask(netmask);
	308	}
	309
	310	if (netmask == 32) {
	311	hosts = 1;
b9fed748	312	elements = (u64)last_ip - first_ip + 1;
72205fc6 JK	313	} else {
	314	u8 mask_bits;
	315	u32 mask;
	316
	317	mask = range_to_mask(first_ip, last_ip, &mask_bits);
	318
	319	if ((!mask && (first_ip \|\| last_ip != 0xFFFFFFFF)) \|\|
	320	netmask <= mask_bits)
	321	return -IPSET_ERR_BITMAP_RANGE;
	322
	323	pr_debug("mask_bits %u, netmask %u\n", mask_bits, netmask);
	324	hosts = 2 << (32 - netmask - 1);
	325	elements = 2 << (netmask - mask_bits - 1);
	326	}
	327	if (elements > IPSET_BITMAP_MAX_RANGE + 1)
	328	return -IPSET_ERR_BITMAP_RANGE_SIZE;
	329
b9fed748 JK	330	pr_debug("hosts %u, elements %llu\n",
b9fed748 JK	331	hosts, (unsigned long long)elements);
72205fc6 JK	332
	333	map = kzalloc(sizeof(*map), GFP_KERNEL);
	334	if (!map)
	335	return -ENOMEM;
	336
b0da3905 JK	337	map->memsize = bitmap_bytes(0, elements - 1);
b0da3905 JK	338	set->variant = &bitmap_ip;
f48d19db JK	339	if (tb[IPSET_ATTR_CADT_FLAGS])
	340	cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
	341	if (cadt_flags & IPSET_FLAG_WITH_COUNTERS) {
	342	set->extensions \|= IPSET_EXT_COUNTER;
	343	if (tb[IPSET_ATTR_TIMEOUT]) {
	344	map->dsize = sizeof(struct bitmap_ipct_elem);
	345	map->offset[IPSET_OFFSET_TIMEOUT] =
	346	offsetof(struct bitmap_ipct_elem, timeout);
	347	map->offset[IPSET_OFFSET_COUNTER] =
	348	offsetof(struct bitmap_ipct_elem, counter);
	349
	350	if (!init_map_ip(set, map, first_ip, last_ip,
	351	elements, hosts, netmask)) {
	352	kfree(map);
	353	return -ENOMEM;
	354	}
	355
	356	map->timeout = ip_set_timeout_uget(
	357	tb[IPSET_ATTR_TIMEOUT]);
	358	set->extensions \|= IPSET_EXT_TIMEOUT;
	359
	360	bitmap_ip_gc_init(set, bitmap_ip_gc);
	361	} else {
	362	map->dsize = sizeof(struct bitmap_ipc_elem);
	363	map->offset[IPSET_OFFSET_COUNTER] =
	364	offsetof(struct bitmap_ipc_elem, counter);
	365
	366	if (!init_map_ip(set, map, first_ip, last_ip,
	367	elements, hosts, netmask)) {
	368	kfree(map);
	369	return -ENOMEM;
	370	}
	371	}
	372	} else if (tb[IPSET_ATTR_TIMEOUT]) {
b0da3905 JK	373	map->dsize = sizeof(struct bitmap_ipt_elem);
	374	map->offset[IPSET_OFFSET_TIMEOUT] =
	375	offsetof(struct bitmap_ipt_elem, timeout);
72205fc6 JK	376
	377	if (!init_map_ip(set, map, first_ip, last_ip,
	378	elements, hosts, netmask)) {
	379	kfree(map);
	380	return -ENOMEM;
	381	}
	382
	383	map->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
b0da3905	384	set->extensions \|= IPSET_EXT_TIMEOUT;
72205fc6	385
b0da3905	386	bitmap_ip_gc_init(set, bitmap_ip_gc);
72205fc6	387	} else {
b0da3905	388	map->dsize = 0;
72205fc6 JK	389	if (!init_map_ip(set, map, first_ip, last_ip,
	390	elements, hosts, netmask)) {
	391	kfree(map);
	392	return -ENOMEM;
	393	}
72205fc6 JK	394	}
	395	return 0;
	396	}
	397
	398	static struct ip_set_type bitmap_ip_type __read_mostly = {
	399	.name = "bitmap:ip",
	400	.protocol = IPSET_PROTOCOL,
	401	.features = IPSET_TYPE_IP,
	402	.dimension = IPSET_DIM_ONE,
c15f1c83	403	.family = NFPROTO_IPV4,
35b8dcf8 JK	404	.revision_min = IPSET_TYPE_REV_MIN,
35b8dcf8 JK	405	.revision_max = IPSET_TYPE_REV_MAX,
72205fc6 JK	406	.create = bitmap_ip_create,
	407	.create_policy = {
	408	[IPSET_ATTR_IP] = { .type = NLA_NESTED },
	409	[IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
	410	[IPSET_ATTR_CIDR] = { .type = NLA_U8 },
	411	[IPSET_ATTR_NETMASK] = { .type = NLA_U8 },
	412	[IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
f48d19db	413	[IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
72205fc6 JK	414	},
	415	.adt_policy = {
	416	[IPSET_ATTR_IP] = { .type = NLA_NESTED },
	417	[IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
	418	[IPSET_ATTR_CIDR] = { .type = NLA_U8 },
	419	[IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
	420	[IPSET_ATTR_LINENO] = { .type = NLA_U32 },
f48d19db JK	421	[IPSET_ATTR_BYTES] = { .type = NLA_U64 },
f48d19db JK	422	[IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
72205fc6 JK	423	},
	424	.me = THIS_MODULE,
	425	};
	426
	427	static int __init
	428	bitmap_ip_init(void)
	429	{
	430	return ip_set_type_register(&bitmap_ip_type);
	431	}
	432
	433	static void __exit
	434	bitmap_ip_fini(void)
	435	{
	436	ip_set_type_unregister(&bitmap_ip_type);
	437	}
	438
	439	module_init(bitmap_ip_init);
	440	module_exit(bitmap_ip_fini);