[deliverable/linux.git] / include / linux / netfilter / ipset / ip_set.h

/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
 *                         Patrick Schaaf <bof@bof.de>
 *                         Martin Josefsson <gandalf@wlug.westbo.se>
 * 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.
 */
#ifndef _IP_SET_H
#define _IP_SET_H

#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/netlink.h>
#include <linux/netfilter.h>
#include <linux/netfilter/x_tables.h>
#include <linux/stringify.h>
#include <linux/vmalloc.h>
#include <net/netlink.h>
#include <uapi/linux/netfilter/ipset/ip_set.h>

#define _IP_SET_MODULE_DESC(a, b, c)		\
	MODULE_DESCRIPTION(a " type of IP sets, revisions " b "-" c)
#define IP_SET_MODULE_DESC(a, b, c)		\
	_IP_SET_MODULE_DESC(a, __stringify(b), __stringify(c))

/* Set features */
enum ip_set_feature {
	IPSET_TYPE_IP_FLAG = 0,
	IPSET_TYPE_IP = (1 << IPSET_TYPE_IP_FLAG),
	IPSET_TYPE_PORT_FLAG = 1,
	IPSET_TYPE_PORT = (1 << IPSET_TYPE_PORT_FLAG),
	IPSET_TYPE_MAC_FLAG = 2,
	IPSET_TYPE_MAC = (1 << IPSET_TYPE_MAC_FLAG),
	IPSET_TYPE_IP2_FLAG = 3,
	IPSET_TYPE_IP2 = (1 << IPSET_TYPE_IP2_FLAG),
	IPSET_TYPE_NAME_FLAG = 4,
	IPSET_TYPE_NAME = (1 << IPSET_TYPE_NAME_FLAG),
	IPSET_TYPE_IFACE_FLAG = 5,
	IPSET_TYPE_IFACE = (1 << IPSET_TYPE_IFACE_FLAG),
	IPSET_TYPE_NOMATCH_FLAG = 6,
	IPSET_TYPE_NOMATCH = (1 << IPSET_TYPE_NOMATCH_FLAG),
	/* Strictly speaking not a feature, but a flag for dumping:
	 * this settype must be dumped last */
	IPSET_DUMP_LAST_FLAG = 7,
	IPSET_DUMP_LAST = (1 << IPSET_DUMP_LAST_FLAG),
};

/* Set extensions */
enum ip_set_extension {
	IPSET_EXT_NONE = 0,
	IPSET_EXT_BIT_TIMEOUT = 1,
	IPSET_EXT_TIMEOUT = (1 << IPSET_EXT_BIT_TIMEOUT),
	IPSET_EXT_BIT_COUNTER = 2,
	IPSET_EXT_COUNTER = (1 << IPSET_EXT_BIT_COUNTER),
};

/* Extension offsets */
enum ip_set_offset {
	IPSET_OFFSET_TIMEOUT = 0,
	IPSET_OFFSET_COUNTER,
	IPSET_OFFSET_MAX,
};

#define SET_WITH_TIMEOUT(s)	((s)->extensions & IPSET_EXT_TIMEOUT)
#define SET_WITH_COUNTER(s)	((s)->extensions & IPSET_EXT_COUNTER)

struct ip_set_ext {
	unsigned long timeout;
	u64 packets;
	u64 bytes;
};

struct ip_set;

typedef int (*ipset_adtfn)(struct ip_set *set, void *value,
			   const struct ip_set_ext *ext,
			   struct ip_set_ext *mext, u32 cmdflags);

/* Kernel API function options */
struct ip_set_adt_opt {
	u8 family;		/* Actual protocol family */
	u8 dim;			/* Dimension of match/target */
	u8 flags;		/* Direction and negation flags */
	u32 cmdflags;		/* Command-like flags */
	struct ip_set_ext ext;	/* Extensions */
};

/* Set type, variant-specific part */
struct ip_set_type_variant {
	/* Kernelspace: test/add/del entries
	 *		returns negative error code,
	 *			zero for no match/success to add/delete
	 *			positive for matching element */
	int (*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);

	/* Userspace: test/add/del entries
	 *		returns negative error code,
	 *			zero for no match/success to add/delete
	 *			positive for matching element */
	int (*uadt)(struct ip_set *set, struct nlattr *tb[],
		    enum ipset_adt adt, u32 *lineno, u32 flags, bool retried);

	/* Low level add/del/test functions */
	ipset_adtfn adt[IPSET_ADT_MAX];

	/* When adding entries and set is full, try to resize the set */
	int (*resize)(struct ip_set *set, bool retried);
	/* Destroy the set */
	void (*destroy)(struct ip_set *set);
	/* Flush the elements */
	void (*flush)(struct ip_set *set);
	/* Expire entries before listing */
	void (*expire)(struct ip_set *set);
	/* List set header data */
	int (*head)(struct ip_set *set, struct sk_buff *skb);
	/* List elements */
	int (*list)(const struct ip_set *set, struct sk_buff *skb,
		    struct netlink_callback *cb);

	/* Return true if "b" set is the same as "a"
	 * according to the create set parameters */
	bool (*same_set)(const struct ip_set *a, const struct ip_set *b);
};

/* The core set type structure */
struct ip_set_type {
	struct list_head list;

	/* Typename */
	char name[IPSET_MAXNAMELEN];
	/* Protocol version */
	u8 protocol;
	/* Set features to control swapping */
	u8 features;
	/* Set type dimension */
	u8 dimension;
	/*
	 * Supported family: may be NFPROTO_UNSPEC for both
	 * NFPROTO_IPV4/NFPROTO_IPV6.
	 */
	u8 family;
	/* Type revisions */
	u8 revision_min, revision_max;

	/* Create set */
	int (*create)(struct ip_set *set, struct nlattr *tb[], u32 flags);

	/* Attribute policies */
	const struct nla_policy create_policy[IPSET_ATTR_CREATE_MAX + 1];
	const struct nla_policy adt_policy[IPSET_ATTR_ADT_MAX + 1];

	/* Set this to THIS_MODULE if you are a module, otherwise NULL */
	struct module *me;
};

/* register and unregister set type */
extern int ip_set_type_register(struct ip_set_type *set_type);
extern void ip_set_type_unregister(struct ip_set_type *set_type);

/* A generic IP set */
struct ip_set {
	/* The name of the set */
	char name[IPSET_MAXNAMELEN];
	/* Lock protecting the set data */
	rwlock_t lock;
	/* References to the set */
	u32 ref;
	/* The core set type */
	struct ip_set_type *type;
	/* The type variant doing the real job */
	const struct ip_set_type_variant *variant;
	/* The actual INET family of the set */
	u8 family;
	/* The type revision */
	u8 revision;
	/* Extensions */
	u8 extensions;
	/* The type specific data */
	void *data;
};

struct ip_set_counter {
	atomic64_t bytes;
	atomic64_t packets;
};

static inline void
ip_set_add_bytes(u64 bytes, struct ip_set_counter *counter)
{
	atomic64_add((long long)bytes, &(counter)->bytes);
}

static inline void
ip_set_add_packets(u64 packets, struct ip_set_counter *counter)
{
	atomic64_add((long long)packets, &(counter)->packets);
}

static inline u64
ip_set_get_bytes(const struct ip_set_counter *counter)
{
	return (u64)atomic64_read(&(counter)->bytes);
}

static inline u64
ip_set_get_packets(const struct ip_set_counter *counter)
{
	return (u64)atomic64_read(&(counter)->packets);
}

static inline void
ip_set_update_counter(struct ip_set_counter *counter,
		      const struct ip_set_ext *ext,
		      struct ip_set_ext *mext, u32 flags)
{
	if (ext->packets != ULLONG_MAX &&
	    !(flags & IPSET_FLAG_SKIP_COUNTER_UPDATE)) {
		ip_set_add_bytes(ext->bytes, counter);
		ip_set_add_packets(ext->packets, counter);
	}
	if (flags & IPSET_FLAG_MATCH_COUNTERS) {
		mext->packets = ip_set_get_packets(counter);
		mext->bytes = ip_set_get_bytes(counter);
	}
}

static inline bool
ip_set_put_counter(struct sk_buff *skb, struct ip_set_counter *counter)
{
	return nla_put_net64(skb, IPSET_ATTR_BYTES,
			     cpu_to_be64(ip_set_get_bytes(counter))) ||
	       nla_put_net64(skb, IPSET_ATTR_PACKETS,
			     cpu_to_be64(ip_set_get_packets(counter)));
}

static inline void
ip_set_init_counter(struct ip_set_counter *counter,
		    const struct ip_set_ext *ext)
{
	if (ext->bytes != ULLONG_MAX)
		atomic64_set(&(counter)->bytes, (long long)(ext->bytes));
	if (ext->packets != ULLONG_MAX)
		atomic64_set(&(counter)->packets, (long long)(ext->packets));
}

/* register and unregister set references */
extern ip_set_id_t ip_set_get_byname(const char *name, struct ip_set **set);
extern void ip_set_put_byindex(ip_set_id_t index);
extern const char *ip_set_name_byindex(ip_set_id_t index);
extern ip_set_id_t ip_set_nfnl_get(const char *name);
extern ip_set_id_t ip_set_nfnl_get_byindex(ip_set_id_t index);
extern void ip_set_nfnl_put(ip_set_id_t index);

/* API for iptables set match, and SET target */

extern int ip_set_add(ip_set_id_t id, const struct sk_buff *skb,
		      const struct xt_action_param *par,
		      struct ip_set_adt_opt *opt);
extern int ip_set_del(ip_set_id_t id, const struct sk_buff *skb,
		      const struct xt_action_param *par,
		      struct ip_set_adt_opt *opt);
extern int ip_set_test(ip_set_id_t id, const struct sk_buff *skb,
		       const struct xt_action_param *par,
		       struct ip_set_adt_opt *opt);

/* Utility functions */
extern void *ip_set_alloc(size_t size);
extern void ip_set_free(void *members);
extern int ip_set_get_ipaddr4(struct nlattr *nla,  __be32 *ipaddr);
extern int ip_set_get_ipaddr6(struct nlattr *nla, union nf_inet_addr *ipaddr);
extern int ip_set_get_extensions(struct ip_set *set, struct nlattr *tb[],
				 struct ip_set_ext *ext);

static inline int
ip_set_get_hostipaddr4(struct nlattr *nla, u32 *ipaddr)
{
	__be32 ip;
	int ret = ip_set_get_ipaddr4(nla, &ip);

	if (ret)
		return ret;
	*ipaddr = ntohl(ip);
	return 0;
}

/* Ignore IPSET_ERR_EXIST errors if asked to do so? */
static inline bool
ip_set_eexist(int ret, u32 flags)
{
	return ret == -IPSET_ERR_EXIST && (flags & IPSET_FLAG_EXIST);
}

/* Match elements marked with nomatch */
static inline bool
ip_set_enomatch(int ret, u32 flags, enum ipset_adt adt, struct ip_set *set)
{
	return adt == IPSET_TEST &&
	       (set->type->features & IPSET_TYPE_NOMATCH) &&
	       ((flags >> 16) & IPSET_FLAG_NOMATCH) &&
	       (ret > 0 || ret == -ENOTEMPTY);
}

/* Check the NLA_F_NET_BYTEORDER flag */
static inline bool
ip_set_attr_netorder(struct nlattr *tb[], int type)
{
	return tb[type] && (tb[type]->nla_type & NLA_F_NET_BYTEORDER);
}

static inline bool
ip_set_optattr_netorder(struct nlattr *tb[], int type)
{
	return !tb[type] || (tb[type]->nla_type & NLA_F_NET_BYTEORDER);
}

/* Useful converters */
static inline u32
ip_set_get_h32(const struct nlattr *attr)
{
	return ntohl(nla_get_be32(attr));
}

static inline u16
ip_set_get_h16(const struct nlattr *attr)
{
	return ntohs(nla_get_be16(attr));
}

#define ipset_nest_start(skb, attr) nla_nest_start(skb, attr | NLA_F_NESTED)
#define ipset_nest_end(skb, start)  nla_nest_end(skb, start)

static inline int nla_put_ipaddr4(struct sk_buff *skb, int type, __be32 ipaddr)
{
	struct nlattr *__nested = ipset_nest_start(skb, type);
	int ret;

	if (!__nested)
		return -EMSGSIZE;
	ret = nla_put_net32(skb, IPSET_ATTR_IPADDR_IPV4, ipaddr);
	if (!ret)
		ipset_nest_end(skb, __nested);
	return ret;
}

static inline int nla_put_ipaddr6(struct sk_buff *skb, int type,
				  const struct in6_addr *ipaddrptr)
{
	struct nlattr *__nested = ipset_nest_start(skb, type);
	int ret;

	if (!__nested)
		return -EMSGSIZE;
	ret = nla_put(skb, IPSET_ATTR_IPADDR_IPV6,
		      sizeof(struct in6_addr), ipaddrptr);
	if (!ret)
		ipset_nest_end(skb, __nested);
	return ret;
}

/* Get address from skbuff */
static inline __be32
ip4addr(const struct sk_buff *skb, bool src)
{
	return src ? ip_hdr(skb)->saddr : ip_hdr(skb)->daddr;
}

static inline void
ip4addrptr(const struct sk_buff *skb, bool src, __be32 *addr)
{
	*addr = src ? ip_hdr(skb)->saddr : ip_hdr(skb)->daddr;
}

static inline void
ip6addrptr(const struct sk_buff *skb, bool src, struct in6_addr *addr)
{
	memcpy(addr, src ? &ipv6_hdr(skb)->saddr : &ipv6_hdr(skb)->daddr,
	       sizeof(*addr));
}

/* Calculate the bytes required to store the inclusive range of a-b */
static inline int
bitmap_bytes(u32 a, u32 b)
{
	return 4 * ((((b - a + 8) / 8) + 3) / 4);
}

#include <linux/netfilter/ipset/ip_set_timeout.h>

#define IP_SET_INIT_KEXT(skb, opt, map)			\
	{ .bytes = (skb)->len, .packets = 1,		\
	  .timeout = ip_set_adt_opt_timeout(opt, map) }

#define IP_SET_INIT_UEXT(map)				\
	{ .bytes = ULLONG_MAX, .packets = ULLONG_MAX,	\
	  .timeout = (map)->timeout }

#endif /*_IP_SET_H */
Commit	Line	Data
a7b4f989 JK	1	/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
	2	* Patrick Schaaf <bof@bof.de>
	3	* Martin Josefsson <gandalf@wlug.westbo.se>
075e64c0	4	* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
a7b4f989 JK	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
a8201414 DH	10	#ifndef _IP_SET_H
a8201414 DH	11	#define _IP_SET_H
a7b4f989	12
ae8ded1c JE	13	#include <linux/ip.h>
	14	#include <linux/ipv6.h>
	15	#include <linux/netlink.h>
	16	#include <linux/netfilter.h>
	17	#include <linux/netfilter/x_tables.h>
10111a6e	18	#include <linux/stringify.h>
ae8ded1c JE	19	#include <linux/vmalloc.h>
ae8ded1c JE	20	#include <net/netlink.h>
a8201414	21	#include <uapi/linux/netfilter/ipset/ip_set.h>
ae8ded1c	22
10111a6e JK	23	#define _IP_SET_MODULE_DESC(a, b, c) \
	24	MODULE_DESCRIPTION(a " type of IP sets, revisions " b "-" c)
	25	#define IP_SET_MODULE_DESC(a, b, c) \
	26	_IP_SET_MODULE_DESC(a, __stringify(b), __stringify(c))
	27
a7b4f989 JK	28	/* Set features */
	29	enum ip_set_feature {
	30	IPSET_TYPE_IP_FLAG = 0,
	31	IPSET_TYPE_IP = (1 << IPSET_TYPE_IP_FLAG),
	32	IPSET_TYPE_PORT_FLAG = 1,
	33	IPSET_TYPE_PORT = (1 << IPSET_TYPE_PORT_FLAG),
	34	IPSET_TYPE_MAC_FLAG = 2,
	35	IPSET_TYPE_MAC = (1 << IPSET_TYPE_MAC_FLAG),
	36	IPSET_TYPE_IP2_FLAG = 3,
	37	IPSET_TYPE_IP2 = (1 << IPSET_TYPE_IP2_FLAG),
	38	IPSET_TYPE_NAME_FLAG = 4,
	39	IPSET_TYPE_NAME = (1 << IPSET_TYPE_NAME_FLAG),
e385357a JK	40	IPSET_TYPE_IFACE_FLAG = 5,
e385357a JK	41	IPSET_TYPE_IFACE = (1 << IPSET_TYPE_IFACE_FLAG),
3e0304a5 JK	42	IPSET_TYPE_NOMATCH_FLAG = 6,
3e0304a5 JK	43	IPSET_TYPE_NOMATCH = (1 << IPSET_TYPE_NOMATCH_FLAG),
a7b4f989 JK	44	/* Strictly speaking not a feature, but a flag for dumping:
	45	* this settype must be dumped last */
	46	IPSET_DUMP_LAST_FLAG = 7,
	47	IPSET_DUMP_LAST = (1 << IPSET_DUMP_LAST_FLAG),
	48	};
	49
075e64c0 JK	50	/* Set extensions */
	51	enum ip_set_extension {
	52	IPSET_EXT_NONE = 0,
	53	IPSET_EXT_BIT_TIMEOUT = 1,
	54	IPSET_EXT_TIMEOUT = (1 << IPSET_EXT_BIT_TIMEOUT),
34d666d4 JK	55	IPSET_EXT_BIT_COUNTER = 2,
34d666d4 JK	56	IPSET_EXT_COUNTER = (1 << IPSET_EXT_BIT_COUNTER),
075e64c0 JK	57	};
	58
	59	/* Extension offsets */
	60	enum ip_set_offset {
	61	IPSET_OFFSET_TIMEOUT = 0,
34d666d4	62	IPSET_OFFSET_COUNTER,
075e64c0 JK	63	IPSET_OFFSET_MAX,
	64	};
	65
	66	#define SET_WITH_TIMEOUT(s) ((s)->extensions & IPSET_EXT_TIMEOUT)
34d666d4	67	#define SET_WITH_COUNTER(s) ((s)->extensions & IPSET_EXT_COUNTER)
075e64c0 JK	68
	69	struct ip_set_ext {
	70	unsigned long timeout;
34d666d4 JK	71	u64 packets;
34d666d4 JK	72	u64 bytes;
075e64c0 JK	73	};
075e64c0 JK	74
a7b4f989 JK	75	struct ip_set;
a7b4f989 JK	76
5416219e	77	typedef int (ipset_adtfn)(struct ip_set set, void *value,
075e64c0	78	const struct ip_set_ext *ext,
6e01781d	79	struct ip_set_ext *mext, u32 cmdflags);
a7b4f989	80
ac8cc925 JK	81	/* Kernel API function options */
	82	struct ip_set_adt_opt {
	83	u8 family; /* Actual protocol family */
	84	u8 dim; /* Dimension of match/target */
	85	u8 flags; /* Direction and negation flags */
	86	u32 cmdflags; /* Command-like flags */
075e64c0	87	struct ip_set_ext ext; /* Extensions */
ac8cc925 JK	88	};
ac8cc925 JK	89
a7b4f989 JK	90	/* Set type, variant-specific part */
	91	struct ip_set_type_variant {
	92	/* Kernelspace: test/add/del entries
	93	* returns negative error code,
	94	* zero for no match/success to add/delete
	95	* positive for matching element */
3ace95c0	96	int (kadt)(struct ip_set set, const struct sk_buff *skb,
b66554cf	97	const struct xt_action_param *par,
075e64c0	98	enum ipset_adt adt, struct ip_set_adt_opt *opt);
a7b4f989 JK	99
	100	/* Userspace: test/add/del entries
	101	* returns negative error code,
	102	* zero for no match/success to add/delete
	103	* positive for matching element */
	104	int (uadt)(struct ip_set set, struct nlattr *tb[],
3d14b171	105	enum ipset_adt adt, u32 *lineno, u32 flags, bool retried);
a7b4f989 JK	106
	107	/* Low level add/del/test functions */
	108	ipset_adtfn adt[IPSET_ADT_MAX];
	109
	110	/* When adding entries and set is full, try to resize the set */
	111	int (resize)(struct ip_set set, bool retried);
	112	/* Destroy the set */
	113	void (destroy)(struct ip_set set);
	114	/* Flush the elements */
	115	void (flush)(struct ip_set set);
	116	/* Expire entries before listing */
	117	void (expire)(struct ip_set set);
	118	/* List set header data */
	119	int (head)(struct ip_set set, struct sk_buff *skb);
	120	/* List elements */
	121	int (list)(const struct ip_set set, struct sk_buff *skb,
	122	struct netlink_callback *cb);
	123
	124	/* Return true if "b" set is the same as "a"
	125	* according to the create set parameters */
	126	bool (same_set)(const struct ip_set a, const struct ip_set *b);
	127	};
	128
	129	/* The core set type structure */
	130	struct ip_set_type {
	131	struct list_head list;
	132
	133	/* Typename */
	134	char name[IPSET_MAXNAMELEN];
	135	/* Protocol version */
	136	u8 protocol;
	137	/* Set features to control swapping */
	138	u8 features;
	139	/* Set type dimension */
	140	u8 dimension;
c15f1c83 JE	141	/*
	142	* Supported family: may be NFPROTO_UNSPEC for both
	143	* NFPROTO_IPV4/NFPROTO_IPV6.
	144	*/
a7b4f989	145	u8 family;
f1e00b39 JK	146	/* Type revisions */
f1e00b39 JK	147	u8 revision_min, revision_max;
a7b4f989 JK	148
	149	/* Create set */
	150	int (create)(struct ip_set set, struct nlattr *tb[], u32 flags);
	151
	152	/* Attribute policies */
	153	const struct nla_policy create_policy[IPSET_ATTR_CREATE_MAX + 1];
	154	const struct nla_policy adt_policy[IPSET_ATTR_ADT_MAX + 1];
	155
	156	/* Set this to THIS_MODULE if you are a module, otherwise NULL */
	157	struct module *me;
	158	};
	159
	160	/* register and unregister set type */
	161	extern int ip_set_type_register(struct ip_set_type *set_type);
	162	extern void ip_set_type_unregister(struct ip_set_type *set_type);
	163
	164	/* A generic IP set */
	165	struct ip_set {
	166	/* The name of the set */
	167	char name[IPSET_MAXNAMELEN];
	168	/* Lock protecting the set data */
	169	rwlock_t lock;
	170	/* References to the set */
2f9f28b2	171	u32 ref;
a7b4f989 JK	172	/* The core set type */
	173	struct ip_set_type *type;
	174	/* The type variant doing the real job */
	175	const struct ip_set_type_variant *variant;
	176	/* The actual INET family of the set */
	177	u8 family;
f1e00b39 JK	178	/* The type revision */
f1e00b39 JK	179	u8 revision;
075e64c0 JK	180	/* Extensions */
075e64c0 JK	181	u8 extensions;
a7b4f989 JK	182	/* The type specific data */
	183	void *data;
	184	};
	185
34d666d4 JK	186	struct ip_set_counter {
	187	atomic64_t bytes;
	188	atomic64_t packets;
	189	};
	190
	191	static inline void
	192	ip_set_add_bytes(u64 bytes, struct ip_set_counter *counter)
	193	{
	194	atomic64_add((long long)bytes, &(counter)->bytes);
	195	}
	196
	197	static inline void
	198	ip_set_add_packets(u64 packets, struct ip_set_counter *counter)
	199	{
	200	atomic64_add((long long)packets, &(counter)->packets);
	201	}
	202
	203	static inline u64
	204	ip_set_get_bytes(const struct ip_set_counter *counter)
	205	{
	206	return (u64)atomic64_read(&(counter)->bytes);
	207	}
	208
	209	static inline u64
	210	ip_set_get_packets(const struct ip_set_counter *counter)
	211	{
	212	return (u64)atomic64_read(&(counter)->packets);
	213	}
	214
	215	static inline void
	216	ip_set_update_counter(struct ip_set_counter *counter,
	217	const struct ip_set_ext *ext,
	218	struct ip_set_ext *mext, u32 flags)
	219	{
6e01781d JK	220	if (ext->packets != ULLONG_MAX &&
6e01781d JK	221	!(flags & IPSET_FLAG_SKIP_COUNTER_UPDATE)) {
34d666d4 JK	222	ip_set_add_bytes(ext->bytes, counter);
	223	ip_set_add_packets(ext->packets, counter);
	224	}
6e01781d JK	225	if (flags & IPSET_FLAG_MATCH_COUNTERS) {
	226	mext->packets = ip_set_get_packets(counter);
	227	mext->bytes = ip_set_get_bytes(counter);
	228	}
34d666d4 JK	229	}
	230
	231	static inline bool
	232	ip_set_put_counter(struct sk_buff skb, struct ip_set_counter counter)
	233	{
	234	return nla_put_net64(skb, IPSET_ATTR_BYTES,
	235	cpu_to_be64(ip_set_get_bytes(counter))) \|\|
	236	nla_put_net64(skb, IPSET_ATTR_PACKETS,
	237	cpu_to_be64(ip_set_get_packets(counter)));
	238	}
	239
	240	static inline void
	241	ip_set_init_counter(struct ip_set_counter *counter,
	242	const struct ip_set_ext *ext)
	243	{
	244	if (ext->bytes != ULLONG_MAX)
	245	atomic64_set(&(counter)->bytes, (long long)(ext->bytes));
	246	if (ext->packets != ULLONG_MAX)
	247	atomic64_set(&(counter)->packets, (long long)(ext->packets));
	248	}
	249
a7b4f989 JK	250	/* register and unregister set references */
	251	extern ip_set_id_t ip_set_get_byname(const char name, struct ip_set *set);
	252	extern void ip_set_put_byindex(ip_set_id_t index);
15b4d93f	253	extern const char *ip_set_name_byindex(ip_set_id_t index);
a7b4f989 JK	254	extern ip_set_id_t ip_set_nfnl_get(const char *name);
	255	extern ip_set_id_t ip_set_nfnl_get_byindex(ip_set_id_t index);
	256	extern void ip_set_nfnl_put(ip_set_id_t index);
	257
	258	/* API for iptables set match, and SET target */
ac8cc925	259
a7b4f989	260	extern int ip_set_add(ip_set_id_t id, const struct sk_buff *skb,
b66554cf	261	const struct xt_action_param *par,
075e64c0	262	struct ip_set_adt_opt *opt);
a7b4f989	263	extern int ip_set_del(ip_set_id_t id, const struct sk_buff *skb,
b66554cf	264	const struct xt_action_param *par,
075e64c0	265	struct ip_set_adt_opt *opt);
a7b4f989	266	extern int ip_set_test(ip_set_id_t id, const struct sk_buff *skb,
b66554cf	267	const struct xt_action_param *par,
075e64c0	268	struct ip_set_adt_opt *opt);
a7b4f989 JK	269
a7b4f989 JK	270	/* Utility functions */
15b4d93f	271	extern void *ip_set_alloc(size_t size);
a7b4f989 JK	272	extern void ip_set_free(void *members);
	273	extern int ip_set_get_ipaddr4(struct nlattr nla, __be32 ipaddr);
	274	extern int ip_set_get_ipaddr6(struct nlattr nla, union nf_inet_addr ipaddr);
075e64c0 JK	275	extern int ip_set_get_extensions(struct ip_set set, struct nlattr tb[],
075e64c0 JK	276	struct ip_set_ext *ext);
a7b4f989 JK	277
	278	static inline int
	279	ip_set_get_hostipaddr4(struct nlattr nla, u32 ipaddr)
	280	{
	281	__be32 ip;
	282	int ret = ip_set_get_ipaddr4(nla, &ip);
15b4d93f	283
a7b4f989 JK	284	if (ret)
	285	return ret;
	286	*ipaddr = ntohl(ip);
	287	return 0;
	288	}
	289
	290	/* Ignore IPSET_ERR_EXIST errors if asked to do so? */
	291	static inline bool
	292	ip_set_eexist(int ret, u32 flags)
	293	{
	294	return ret == -IPSET_ERR_EXIST && (flags & IPSET_FLAG_EXIST);
	295	}
	296
43c56e59 JK	297	/* Match elements marked with nomatch */
43c56e59 JK	298	static inline bool
0f1799ba	299	ip_set_enomatch(int ret, u32 flags, enum ipset_adt adt, struct ip_set *set)
43c56e59 JK	300	{
43c56e59 JK	301	return adt == IPSET_TEST &&
0f1799ba JK	302	(set->type->features & IPSET_TYPE_NOMATCH) &&
	303	((flags >> 16) & IPSET_FLAG_NOMATCH) &&
	304	(ret > 0 \|\| ret == -ENOTEMPTY);
43c56e59 JK	305	}
43c56e59 JK	306
a7b4f989 JK	307	/* Check the NLA_F_NET_BYTEORDER flag */
	308	static inline bool
	309	ip_set_attr_netorder(struct nlattr *tb[], int type)
	310	{
	311	return tb[type] && (tb[type]->nla_type & NLA_F_NET_BYTEORDER);
	312	}
	313
	314	static inline bool
	315	ip_set_optattr_netorder(struct nlattr *tb[], int type)
	316	{
	317	return !tb[type] \|\| (tb[type]->nla_type & NLA_F_NET_BYTEORDER);
	318	}
	319
	320	/* Useful converters */
	321	static inline u32
	322	ip_set_get_h32(const struct nlattr *attr)
	323	{
	324	return ntohl(nla_get_be32(attr));
	325	}
	326
	327	static inline u16
	328	ip_set_get_h16(const struct nlattr *attr)
	329	{
	330	return ntohs(nla_get_be16(attr));
	331	}
	332
	333	#define ipset_nest_start(skb, attr) nla_nest_start(skb, attr \| NLA_F_NESTED)
	334	#define ipset_nest_end(skb, start) nla_nest_end(skb, start)
	335
7cf7899d DM	336	static inline int nla_put_ipaddr4(struct sk_buff *skb, int type, __be32 ipaddr)
	337	{
	338	struct nlattr *__nested = ipset_nest_start(skb, type);
	339	int ret;
	340
	341	if (!__nested)
	342	return -EMSGSIZE;
	343	ret = nla_put_net32(skb, IPSET_ATTR_IPADDR_IPV4, ipaddr);
	344	if (!ret)
	345	ipset_nest_end(skb, __nested);
	346	return ret;
	347	}
	348
3ace95c0 JK	349	static inline int nla_put_ipaddr6(struct sk_buff *skb, int type,
3ace95c0 JK	350	const struct in6_addr *ipaddrptr)
7cf7899d DM	351	{
	352	struct nlattr *__nested = ipset_nest_start(skb, type);
	353	int ret;
	354
	355	if (!__nested)
	356	return -EMSGSIZE;
	357	ret = nla_put(skb, IPSET_ATTR_IPADDR_IPV6,
	358	sizeof(struct in6_addr), ipaddrptr);
	359	if (!ret)
	360	ipset_nest_end(skb, __nested);
	361	return ret;
	362	}
a7b4f989 JK	363
	364	/* Get address from skbuff */
	365	static inline __be32
	366	ip4addr(const struct sk_buff *skb, bool src)
	367	{
	368	return src ? ip_hdr(skb)->saddr : ip_hdr(skb)->daddr;
	369	}
	370
	371	static inline void
	372	ip4addrptr(const struct sk_buff skb, bool src, __be32 addr)
	373	{
	374	*addr = src ? ip_hdr(skb)->saddr : ip_hdr(skb)->daddr;
	375	}
	376
	377	static inline void
	378	ip6addrptr(const struct sk_buff skb, bool src, struct in6_addr addr)
	379	{
	380	memcpy(addr, src ? &ipv6_hdr(skb)->saddr : &ipv6_hdr(skb)->daddr,
	381	sizeof(*addr));
	382	}
	383
	384	/* Calculate the bytes required to store the inclusive range of a-b */
	385	static inline int
	386	bitmap_bytes(u32 a, u32 b)
	387	{
	388	return 4 * ((((b - a + 8) / 8) + 3) / 4);
	389	}
	390
075e64c0 JK	391	#include <linux/netfilter/ipset/ip_set_timeout.h>
075e64c0 JK	392
34d666d4 JK	393	#define IP_SET_INIT_KEXT(skb, opt, map) \
	394	{ .bytes = (skb)->len, .packets = 1, \
	395	.timeout = ip_set_adt_opt_timeout(opt, map) }
075e64c0	396
34d666d4 JK	397	#define IP_SET_INIT_UEXT(map) \
	398	{ .bytes = ULLONG_MAX, .packets = ULLONG_MAX, \
	399	.timeout = (map)->timeout }
075e64c0	400
a7b4f989	401	#endif /_IP_SET_H /