Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6

include/linux/netfilter/Kbuild

···
+header-y += ipset/
+
 header-y += nf_conntrack_common.h
 header-y += nf_conntrack_ftp.h
 header-y += nf_conntrack_sctp.h
···
 header-y += xt_conntrack.h
 header-y += xt_cpu.h
 header-y += xt_dccp.h
+header-y += xt_devgroup.h
 header-y += xt_dscp.h
 header-y += xt_esp.h
 header-y += xt_hashlimit.h
···
 header-y += xt_rateest.h
 header-y += xt_realm.h
 header-y += xt_recent.h
+header-y += xt_set.h
 header-y += xt_sctp.h
 header-y += xt_socket.h
 header-y += xt_state.h

include/linux/netfilter/ipset/Kbuild

···
+header-y += ip_set.h
+header-y += ip_set_bitmap.h
+header-y += ip_set_hash.h
+header-y += ip_set_list.h

include/linux/netfilter/ipset/ip_set.h

···
+#ifndef _IP_SET_H
+#define _IP_SET_H
+
+/* Copyright (C) 2000-2002 Joakim Axelsson <[e-mail]>
+ *                         Patrick Schaaf <[e-mail]>
+ *                         Martin Josefsson <[e-mail]>
+ * Copyright (C) 2003-2011 Jozsef Kadlecsik <[e-mail]>
+ *
+ * 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.
+ */
+
+/* The protocol version */
+#define IPSET_PROTOCOL		6
+
+/* The max length of strings including NUL: set and type identifiers */
+#define IPSET_MAXNAMELEN	32
+
+/* Message types and commands */
+enum ipset_cmd {
+	IPSET_CMD_NONE,
+	IPSET_CMD_PROTOCOL,	/* 1: Return protocol version */
+	IPSET_CMD_CREATE,	/* 2: Create a new (empty) set */
+	IPSET_CMD_DESTROY,	/* 3: Destroy a (empty) set */
+	IPSET_CMD_FLUSH,	/* 4: Remove all elements from a set */
+	IPSET_CMD_RENAME,	/* 5: Rename a set */
+	IPSET_CMD_SWAP,		/* 6: Swap two sets */
+	IPSET_CMD_LIST,		/* 7: List sets */
+	IPSET_CMD_SAVE,		/* 8: Save sets */
+	IPSET_CMD_ADD,		/* 9: Add an element to a set */
+	IPSET_CMD_DEL,		/* 10: Delete an element from a set */
+	IPSET_CMD_TEST,		/* 11: Test an element in a set */
+	IPSET_CMD_HEADER,	/* 12: Get set header data only */
+	IPSET_CMD_TYPE,		/* 13: Get set type */
+	IPSET_MSG_MAX,		/* Netlink message commands */
+
+	/* Commands in userspace: */
+	IPSET_CMD_RESTORE = IPSET_MSG_MAX, /* 14: Enter restore mode */
+	IPSET_CMD_HELP,		/* 15: Get help */
+	IPSET_CMD_VERSION,	/* 16: Get program version */
+	IPSET_CMD_QUIT,		/* 17: Quit from interactive mode */
+
+	IPSET_CMD_MAX,
+
+	IPSET_CMD_COMMIT = IPSET_CMD_MAX, /* 18: Commit buffered commands */
+};
+
+/* Attributes at command level */
+enum {
+	IPSET_ATTR_UNSPEC,
+	IPSET_ATTR_PROTOCOL,	/* 1: Protocol version */
+	IPSET_ATTR_SETNAME,	/* 2: Name of the set */
+	IPSET_ATTR_TYPENAME,	/* 3: Typename */
+	IPSET_ATTR_SETNAME2 = IPSET_ATTR_TYPENAME, /* Setname at rename/swap */
+	IPSET_ATTR_REVISION,	/* 4: Settype revision */
+	IPSET_ATTR_FAMILY,	/* 5: Settype family */
+	IPSET_ATTR_FLAGS,	/* 6: Flags at command level */
+	IPSET_ATTR_DATA,	/* 7: Nested attributes */
+	IPSET_ATTR_ADT,		/* 8: Multiple data containers */
+	IPSET_ATTR_LINENO,	/* 9: Restore lineno */
+	IPSET_ATTR_PROTOCOL_MIN, /* 10: Minimal supported version number */
+	IPSET_ATTR_REVISION_MIN	= IPSET_ATTR_PROTOCOL_MIN, /* type rev min */
+	__IPSET_ATTR_CMD_MAX,
+};
+#define IPSET_ATTR_CMD_MAX	(__IPSET_ATTR_CMD_MAX - 1)
+
+/* CADT specific attributes */
+enum {
+	IPSET_ATTR_IP = IPSET_ATTR_UNSPEC + 1,
+	IPSET_ATTR_IP_FROM = IPSET_ATTR_IP,
+	IPSET_ATTR_IP_TO,	/* 2 */
+	IPSET_ATTR_CIDR,	/* 3 */
+	IPSET_ATTR_PORT,	/* 4 */
+	IPSET_ATTR_PORT_FROM = IPSET_ATTR_PORT,
+	IPSET_ATTR_PORT_TO,	/* 5 */
+	IPSET_ATTR_TIMEOUT,	/* 6 */
+	IPSET_ATTR_PROTO,	/* 7 */
+	IPSET_ATTR_CADT_FLAGS,	/* 8 */
+	IPSET_ATTR_CADT_LINENO = IPSET_ATTR_LINENO,	/* 9 */
+	/* Reserve empty slots */
+	IPSET_ATTR_CADT_MAX = 16,
+	/* Create-only specific attributes */
+	IPSET_ATTR_GC,
+	IPSET_ATTR_HASHSIZE,
+	IPSET_ATTR_MAXELEM,
+	IPSET_ATTR_NETMASK,
+	IPSET_ATTR_PROBES,
+	IPSET_ATTR_RESIZE,
+	IPSET_ATTR_SIZE,
+	/* Kernel-only */
+	IPSET_ATTR_ELEMENTS,
+	IPSET_ATTR_REFERENCES,
+	IPSET_ATTR_MEMSIZE,
+
+	__IPSET_ATTR_CREATE_MAX,
+};
+#define IPSET_ATTR_CREATE_MAX	(__IPSET_ATTR_CREATE_MAX - 1)
+
+/* ADT specific attributes */
+enum {
+	IPSET_ATTR_ETHER = IPSET_ATTR_CADT_MAX + 1,
+	IPSET_ATTR_NAME,
+	IPSET_ATTR_NAMEREF,
+	IPSET_ATTR_IP2,
+	IPSET_ATTR_CIDR2,
+	__IPSET_ATTR_ADT_MAX,
+};
+#define IPSET_ATTR_ADT_MAX	(__IPSET_ATTR_ADT_MAX - 1)
+
+/* IP specific attributes */
+enum {
+	IPSET_ATTR_IPADDR_IPV4 = IPSET_ATTR_UNSPEC + 1,
+	IPSET_ATTR_IPADDR_IPV6,
+	__IPSET_ATTR_IPADDR_MAX,
+};
+#define IPSET_ATTR_IPADDR_MAX	(__IPSET_ATTR_IPADDR_MAX - 1)
+
+/* Error codes */
+enum ipset_errno {
+	IPSET_ERR_PRIVATE = 4096,
+	IPSET_ERR_PROTOCOL,
+	IPSET_ERR_FIND_TYPE,
+	IPSET_ERR_MAX_SETS,
+	IPSET_ERR_BUSY,
+	IPSET_ERR_EXIST_SETNAME2,
+	IPSET_ERR_TYPE_MISMATCH,
+	IPSET_ERR_EXIST,
+	IPSET_ERR_INVALID_CIDR,
+	IPSET_ERR_INVALID_NETMASK,
+	IPSET_ERR_INVALID_FAMILY,
+	IPSET_ERR_TIMEOUT,
+	IPSET_ERR_REFERENCED,
+	IPSET_ERR_IPADDR_IPV4,
+	IPSET_ERR_IPADDR_IPV6,
+
+	/* Type specific error codes */
+	IPSET_ERR_TYPE_SPECIFIC = 4352,
+};
+
+/* Flags at command level */
+enum ipset_cmd_flags {
+	IPSET_FLAG_BIT_EXIST	= 0,
+	IPSET_FLAG_EXIST	= (1 << IPSET_FLAG_BIT_EXIST),
+};
+
+/* Flags at CADT attribute level */
+enum ipset_cadt_flags {
+	IPSET_FLAG_BIT_BEFORE	= 0,
+	IPSET_FLAG_BEFORE	= (1 << IPSET_FLAG_BIT_BEFORE),
+};
+
+/* Commands with settype-specific attributes */
+enum ipset_adt {
+	IPSET_ADD,
+	IPSET_DEL,
+	IPSET_TEST,
+	IPSET_ADT_MAX,
+	IPSET_CREATE = IPSET_ADT_MAX,
+	IPSET_CADT_MAX,
+};
+
+#ifdef __KERNEL__
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/netlink.h>
+#include <linux/netfilter.h>
+#include <linux/vmalloc.h>
+#include <net/netlink.h>
+
+/* Sets are identified by an index in kernel space. Tweak with ip_set_id_t
+ * and IPSET_INVALID_ID if you want to increase the max number of sets.
+ */
+typedef u16 ip_set_id_t;
+
+#define IPSET_INVALID_ID		65535
+
+enum ip_set_dim {
+	IPSET_DIM_ZERO = 0,
+	IPSET_DIM_ONE,
+	IPSET_DIM_TWO,
+	IPSET_DIM_THREE,
+	/* Max dimension in elements.
+	 * If changed, new revision of iptables match/target is required.
+	 */
+	IPSET_DIM_MAX = 6,
+};
+
+/* Option flags for kernel operations */
+enum ip_set_kopt {
+	IPSET_INV_MATCH = (1 << IPSET_DIM_ZERO),
+	IPSET_DIM_ONE_SRC = (1 << IPSET_DIM_ONE),
+	IPSET_DIM_TWO_SRC = (1 << IPSET_DIM_TWO),
+	IPSET_DIM_THREE_SRC = (1 << IPSET_DIM_THREE),
+};
+
+/* 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),
+	/* 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),
+};
+
+struct ip_set;
+
+typedef int (*ipset_adtfn)(struct ip_set *set, void *value, u32 timeout);
+
+/* 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,
+		    enum ipset_adt adt, u8 pf, u8 dim, u8 flags);
+
+	/* 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);
+
+	/* 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 AF_UNSPEC for both AF_INET/AF_INET6 */
+	u8 family;
+	/* Type revision */
+	u8 revision;
+
+	/* 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 */
+	atomic_t 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 specific data */
+	void *data;
+};
+
+/* 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,
+		      u8 family, u8 dim, u8 flags);
+extern int ip_set_del(ip_set_id_t id, const struct sk_buff *skb,
+		      u8 family, u8 dim, u8 flags);
+extern int ip_set_test(ip_set_id_t id, const struct sk_buff *skb,
+		       u8 family, u8 dim, u8 flags);
+
+/* 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);
+
+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);
+}
+
+/* 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)
+
+#define NLA_PUT_IPADDR4(skb, type, ipaddr)			\
+do {								\
+	struct nlattr *__nested = ipset_nest_start(skb, type);	\
+								\
+	if (!__nested)						\
+		goto nla_put_failure;				\
+	NLA_PUT_NET32(skb, IPSET_ATTR_IPADDR_IPV4, ipaddr);	\
+	ipset_nest_end(skb, __nested);				\
+} while (0)
+
+#define NLA_PUT_IPADDR6(skb, type, ipaddrptr)			\
+do {								\
+	struct nlattr *__nested = ipset_nest_start(skb, type);	\
+								\
+	if (!__nested)						\
+		goto nla_put_failure;				\
+	NLA_PUT(skb, IPSET_ATTR_IPADDR_IPV6,			\
+		sizeof(struct in6_addr), ipaddrptr);		\
+	ipset_nest_end(skb, __nested);				\
+} while (0)
+
+/* 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);
+}
+
+/* Interface to iptables/ip6tables */
+
+#define SO_IP_SET		83
+
+union ip_set_name_index {
+	char name[IPSET_MAXNAMELEN];
+	ip_set_id_t index;
+};
+
+#define IP_SET_OP_GET_BYNAME	0x00000006	/* Get set index by name */
+struct ip_set_req_get_set {
+	unsigned op;
+	unsigned version;
+	union ip_set_name_index set;
+};
+
+#define IP_SET_OP_GET_BYINDEX	0x00000007	/* Get set name by index */
+/* Uses ip_set_req_get_set */
+
+#define IP_SET_OP_VERSION	0x00000100	/* Ask kernel version */
+struct ip_set_req_version {
+	unsigned op;
+	unsigned version;
+};
+
+#endif	/* __KERNEL__ */
+
+#endif /*_IP_SET_H */

include/linux/netfilter/ipset/ip_set_ahash.h

···
+#ifndef _IP_SET_AHASH_H
+#define _IP_SET_AHASH_H
+
+#include <linux/rcupdate.h>
+#include <linux/jhash.h>
+#include <linux/netfilter/ipset/ip_set_timeout.h>
+
+/* Hashing which uses arrays to resolve clashing. The hash table is resized
+ * (doubled) when searching becomes too long.
+ * Internally jhash is used with the assumption that the size of the
+ * stored data is a multiple of sizeof(u32). If storage supports timeout,
+ * the timeout field must be the last one in the data structure - that field
+ * is ignored when computing the hash key.
+ *
+ * Readers and resizing
+ *
+ * Resizing can be triggered by userspace command only, and those
+ * are serialized by the nfnl mutex. During resizing the set is
+ * read-locked, so the only possible concurrent operations are
+ * the kernel side readers. Those must be protected by proper RCU locking.
+ */
+
+/* Number of elements to store in an initial array block */
+#define AHASH_INIT_SIZE			4
+/* Max number of elements to store in an array block */
+#define AHASH_MAX_SIZE			(3*4)
+
+/* A hash bucket */
+struct hbucket {
+	void *value;		/* the array of the values */
+	u8 size;		/* size of the array */
+	u8 pos;			/* position of the first free entry */
+};
+
+/* The hash table: the table size stored here in order to make resizing easy */
+struct htable {
+	u8 htable_bits;		/* size of hash table == 2^htable_bits */
+	struct hbucket bucket[0]; /* hashtable buckets */
+};
+
+#define hbucket(h, i)		&((h)->bucket[i])
+
+/* Book-keeping of the prefixes added to the set */
+struct ip_set_hash_nets {
+	u8 cidr;		/* the different cidr values in the set */
+	u32 nets;		/* number of elements per cidr */
+};
+
+/* The generic ip_set hash structure */
+struct ip_set_hash {
+	struct htable *table;	/* the hash table */
+	u32 maxelem;		/* max elements in the hash */
+	u32 elements;		/* current element (vs timeout) */
+	u32 initval;		/* random jhash init value */
+	u32 timeout;		/* timeout value, if enabled */
+	struct timer_list gc;	/* garbage collection when timeout enabled */
+#ifdef IP_SET_HASH_WITH_NETMASK
+	u8 netmask;		/* netmask value for subnets to store */
+#endif
+#ifdef IP_SET_HASH_WITH_NETS
+	struct ip_set_hash_nets nets[0]; /* book-keeping of prefixes */
+#endif
+};
+
+/* Compute htable_bits from the user input parameter hashsize */
+static u8
+htable_bits(u32 hashsize)
+{
+	/* Assume that hashsize == 2^htable_bits */
+	u8 bits = fls(hashsize - 1);
+	if (jhash_size(bits) != hashsize)
+		/* Round up to the first 2^n value */
+		bits = fls(hashsize);
+
+	return bits;
+}
+
+#ifdef IP_SET_HASH_WITH_NETS
+
+#define SET_HOST_MASK(family)	(family == AF_INET ? 32 : 128)
+
+/* Network cidr size book keeping when the hash stores different
+ * sized networks */
+static void
+add_cidr(struct ip_set_hash *h, u8 cidr, u8 host_mask)
+{
+	u8 i;
+
+	++h->nets[cidr-1].nets;
+
+	pr_debug("add_cidr added %u: %u\n", cidr, h->nets[cidr-1].nets);
+
+	if (h->nets[cidr-1].nets > 1)
+		return;
+
+	/* New cidr size */
+	for (i = 0; i < host_mask && h->nets[i].cidr; i++) {
+		/* Add in increasing prefix order, so larger cidr first */
+		if (h->nets[i].cidr < cidr)
+			swap(h->nets[i].cidr, cidr);
+	}
+	if (i < host_mask)
+		h->nets[i].cidr = cidr;
+}
+
+static void
+del_cidr(struct ip_set_hash *h, u8 cidr, u8 host_mask)
+{
+	u8 i;
+
+	--h->nets[cidr-1].nets;
+
+	pr_debug("del_cidr deleted %u: %u\n", cidr, h->nets[cidr-1].nets);
+
+	if (h->nets[cidr-1].nets != 0)
+		return;
+
+	/* All entries with this cidr size deleted, so cleanup h->cidr[] */
+	for (i = 0; i < host_mask - 1 && h->nets[i].cidr; i++) {
+		if (h->nets[i].cidr == cidr)
+			h->nets[i].cidr = cidr = h->nets[i+1].cidr;
+	}
+	h->nets[i - 1].cidr = 0;
+}
+#endif
+
+/* Destroy the hashtable part of the set */
+static void
+ahash_destroy(struct htable *t)
+{
+	struct hbucket *n;
+	u32 i;
+
+	for (i = 0; i < jhash_size(t->htable_bits); i++) {
+		n = hbucket(t, i);
+		if (n->size)
+			/* FIXME: use slab cache */
+			kfree(n->value);
+	}
+
+	ip_set_free(t);
+}
+
+/* Calculate the actual memory size of the set data */
+static size_t
+ahash_memsize(const struct ip_set_hash *h, size_t dsize, u8 host_mask)
+{
+	u32 i;
+	struct htable *t = h->table;
+	size_t memsize = sizeof(*h)
+			 + sizeof(*t)
+#ifdef IP_SET_HASH_WITH_NETS
+			 + sizeof(struct ip_set_hash_nets) * host_mask
+#endif
+			 + jhash_size(t->htable_bits) * sizeof(struct hbucket);
+
+	for (i = 0; i < jhash_size(t->htable_bits); i++)
+			memsize += t->bucket[i].size * dsize;
+
+	return memsize;
+}
+
+/* Flush a hash type of set: destroy all elements */
+static void
+ip_set_hash_flush(struct ip_set *set)
+{
+	struct ip_set_hash *h = set->data;
+	struct htable *t = h->table;
+	struct hbucket *n;
+	u32 i;
+
+	for (i = 0; i < jhash_size(t->htable_bits); i++) {
+		n = hbucket(t, i);
+		if (n->size) {
+			n->size = n->pos = 0;
+			/* FIXME: use slab cache */
+			kfree(n->value);
+		}
+	}
+#ifdef IP_SET_HASH_WITH_NETS
+	memset(h->nets, 0, sizeof(struct ip_set_hash_nets)
+			   * SET_HOST_MASK(set->family));
+#endif
+	h->elements = 0;
+}
+
+/* Destroy a hash type of set */
+static void
+ip_set_hash_destroy(struct ip_set *set)
+{
+	struct ip_set_hash *h = set->data;
+
+	if (with_timeout(h->timeout))
+		del_timer_sync(&h->gc);
+
+	ahash_destroy(h->table);
+	kfree(h);
+
+	set->data = NULL;
+}
+
+#define HKEY(data, initval, htable_bits)				 \
+(jhash2((u32 *)(data), sizeof(struct type_pf_elem)/sizeof(u32), initval) \
+	& jhash_mask(htable_bits))
+
+#endif /* _IP_SET_AHASH_H */
+
+#define CONCAT(a, b, c)		a##b##c
+#define TOKEN(a, b, c)		CONCAT(a, b, c)
+
+/* Type/family dependent function prototypes */
+
+#define type_pf_data_equal	TOKEN(TYPE, PF, _data_equal)
+#define type_pf_data_isnull	TOKEN(TYPE, PF, _data_isnull)
+#define type_pf_data_copy	TOKEN(TYPE, PF, _data_copy)
+#define type_pf_data_zero_out	TOKEN(TYPE, PF, _data_zero_out)
+#define type_pf_data_netmask	TOKEN(TYPE, PF, _data_netmask)
+#define type_pf_data_list	TOKEN(TYPE, PF, _data_list)
+#define type_pf_data_tlist	TOKEN(TYPE, PF, _data_tlist)
+
+#define type_pf_elem		TOKEN(TYPE, PF, _elem)
+#define type_pf_telem		TOKEN(TYPE, PF, _telem)
+#define type_pf_data_timeout	TOKEN(TYPE, PF, _data_timeout)
+#define type_pf_data_expired	TOKEN(TYPE, PF, _data_expired)
+#define type_pf_data_timeout_set TOKEN(TYPE, PF, _data_timeout_set)
+
+#define type_pf_elem_add	TOKEN(TYPE, PF, _elem_add)
+#define type_pf_add		TOKEN(TYPE, PF, _add)
+#define type_pf_del		TOKEN(TYPE, PF, _del)
+#define type_pf_test_cidrs	TOKEN(TYPE, PF, _test_cidrs)
+#define type_pf_test		TOKEN(TYPE, PF, _test)
+
+#define type_pf_elem_tadd	TOKEN(TYPE, PF, _elem_tadd)
+#define type_pf_del_telem	TOKEN(TYPE, PF, _ahash_del_telem)
+#define type_pf_expire		TOKEN(TYPE, PF, _expire)
+#define type_pf_tadd		TOKEN(TYPE, PF, _tadd)
+#define type_pf_tdel		TOKEN(TYPE, PF, _tdel)
+#define type_pf_ttest_cidrs	TOKEN(TYPE, PF, _ahash_ttest_cidrs)
+#define type_pf_ttest		TOKEN(TYPE, PF, _ahash_ttest)
+
+#define type_pf_resize		TOKEN(TYPE, PF, _resize)
+#define type_pf_tresize		TOKEN(TYPE, PF, _tresize)
+#define type_pf_flush		ip_set_hash_flush
+#define type_pf_destroy		ip_set_hash_destroy
+#define type_pf_head		TOKEN(TYPE, PF, _head)
+#define type_pf_list		TOKEN(TYPE, PF, _list)
+#define type_pf_tlist		TOKEN(TYPE, PF, _tlist)
+#define type_pf_same_set	TOKEN(TYPE, PF, _same_set)
+#define type_pf_kadt		TOKEN(TYPE, PF, _kadt)
+#define type_pf_uadt		TOKEN(TYPE, PF, _uadt)
+#define type_pf_gc		TOKEN(TYPE, PF, _gc)
+#define type_pf_gc_init		TOKEN(TYPE, PF, _gc_init)
+#define type_pf_variant		TOKEN(TYPE, PF, _variant)
+#define type_pf_tvariant	TOKEN(TYPE, PF, _tvariant)
+
+/* Flavour without timeout */
+
+/* Get the ith element from the array block n */
+#define ahash_data(n, i)	\
+	((struct type_pf_elem *)((n)->value) + (i))
+
+/* Add an element to the hash table when resizing the set:
+ * we spare the maintenance of the internal counters. */
+static int
+type_pf_elem_add(struct hbucket *n, const struct type_pf_elem *value)
+{
+	if (n->pos >= n->size) {
+		void *tmp;
+
+		if (n->size >= AHASH_MAX_SIZE)
+			/* Trigger rehashing */
+			return -EAGAIN;
+
+		tmp = kzalloc((n->size + AHASH_INIT_SIZE)
+			      * sizeof(struct type_pf_elem),
+			      GFP_ATOMIC);
+		if (!tmp)
+			return -ENOMEM;
+		if (n->size) {
+			memcpy(tmp, n->value,
+			       sizeof(struct type_pf_elem) * n->size);
+			kfree(n->value);
+		}
+		n->value = tmp;
+		n->size += AHASH_INIT_SIZE;
+	}
+	type_pf_data_copy(ahash_data(n, n->pos++), value);
+	return 0;
+}
+
+/* Resize a hash: create a new hash table with doubling the hashsize
+ * and inserting the elements to it. Repeat until we succeed or
+ * fail due to memory pressures. */
+static int
+type_pf_resize(struct ip_set *set, bool retried)
+{
+	struct ip_set_hash *h = set->data;
+	struct htable *t, *orig = h->table;
+	u8 htable_bits = orig->htable_bits;
+	const struct type_pf_elem *data;
+	struct hbucket *n, *m;
+	u32 i, j;
+	int ret;
+
+retry:
+	ret = 0;
+	htable_bits++;
+	pr_debug("attempt to resize set %s from %u to %u, t %p\n",
+		 set->name, orig->htable_bits, htable_bits, orig);
+	if (!htable_bits)
+		/* In case we have plenty of memory :-) */
+		return -IPSET_ERR_HASH_FULL;
+	t = ip_set_alloc(sizeof(*t)
+			 + jhash_size(htable_bits) * sizeof(struct hbucket));
+	if (!t)
+		return -ENOMEM;
+	t->htable_bits = htable_bits;
+
+	read_lock_bh(&set->lock);
+	for (i = 0; i < jhash_size(orig->htable_bits); i++) {
+		n = hbucket(orig, i);
+		for (j = 0; j < n->pos; j++) {
+			data = ahash_data(n, j);
+			m = hbucket(t, HKEY(data, h->initval, htable_bits));
+			ret = type_pf_elem_add(m, data);
+			if (ret < 0) {
+				read_unlock_bh(&set->lock);
+				ahash_destroy(t);
+				if (ret == -EAGAIN)
+					goto retry;
+				return ret;
+			}
+		}
+	}
+
+	rcu_assign_pointer(h->table, t);
+	read_unlock_bh(&set->lock);
+
+	/* Give time to other readers of the set */
+	synchronize_rcu_bh();
+
+	pr_debug("set %s resized from %u (%p) to %u (%p)\n", set->name,
+		 orig->htable_bits, orig, t->htable_bits, t);
+	ahash_destroy(orig);
+
+	return 0;
+}
+
+/* Add an element to a hash and update the internal counters when succeeded,
+ * otherwise report the proper error code. */
+static int
+type_pf_add(struct ip_set *set, void *value, u32 timeout)
+{
+	struct ip_set_hash *h = set->data;
+	struct htable *t;
+	const struct type_pf_elem *d = value;
+	struct hbucket *n;
+	int i, ret = 0;
+	u32 key;
+
+	if (h->elements >= h->maxelem)
+		return -IPSET_ERR_HASH_FULL;
+
+	rcu_read_lock_bh();
+	t = rcu_dereference_bh(h->table);
+	key = HKEY(value, h->initval, t->htable_bits);
+	n = hbucket(t, key);
+	for (i = 0; i < n->pos; i++)
+		if (type_pf_data_equal(ahash_data(n, i), d)) {
+			ret = -IPSET_ERR_EXIST;
+			goto out;
+		}
+
+	ret = type_pf_elem_add(n, value);
+	if (ret != 0)
+		goto out;
+
+#ifdef IP_SET_HASH_WITH_NETS
+	add_cidr(h, d->cidr, HOST_MASK);
+#endif
+	h->elements++;
+out:
+	rcu_read_unlock_bh();
+	return ret;
+}
+
+/* Delete an element from the hash: swap it with the last element
+ * and free up space if possible.
+ */
+static int
+type_pf_del(struct ip_set *set, void *value, u32 timeout)
+{
+	struct ip_set_hash *h = set->data;
+	struct htable *t = h->table;
+	const struct type_pf_elem *d = value;
+	struct hbucket *n;
+	int i;
+	struct type_pf_elem *data;
+	u32 key;
+
+	key = HKEY(value, h->initval, t->htable_bits);
+	n = hbucket(t, key);
+	for (i = 0; i < n->pos; i++) {
+		data = ahash_data(n, i);
+		if (!type_pf_data_equal(data, d))
+			continue;
+		if (i != n->pos - 1)
+			/* Not last one */
+			type_pf_data_copy(data, ahash_data(n, n->pos - 1));
+
+		n->pos--;
+		h->elements--;
+#ifdef IP_SET_HASH_WITH_NETS
+		del_cidr(h, d->cidr, HOST_MASK);
+#endif
+		if (n->pos + AHASH_INIT_SIZE < n->size) {
+			void *tmp = kzalloc((n->size - AHASH_INIT_SIZE)
+					    * sizeof(struct type_pf_elem),
+					    GFP_ATOMIC);
+			if (!tmp)
+				return 0;
+			n->size -= AHASH_INIT_SIZE;
+			memcpy(tmp, n->value,
+			       n->size * sizeof(struct type_pf_elem));
+			kfree(n->value);
+			n->value = tmp;
+		}
+		return 0;
+	}
+
+	return -IPSET_ERR_EXIST;
+}
+
+#ifdef IP_SET_HASH_WITH_NETS
+
+/* Special test function which takes into account the different network
+ * sizes added to the set */
+static int
+type_pf_test_cidrs(struct ip_set *set, struct type_pf_elem *d, u32 timeout)
+{
+	struct ip_set_hash *h = set->data;
+	struct htable *t = h->table;
+	struct hbucket *n;
+	const struct type_pf_elem *data;
+	int i, j = 0;
+	u32 key;
+	u8 host_mask = SET_HOST_MASK(set->family);
+
+	pr_debug("test by nets\n");
+	for (; j < host_mask && h->nets[j].cidr; j++) {
+		type_pf_data_netmask(d, h->nets[j].cidr);
+		key = HKEY(d, h->initval, t->htable_bits);
+		n = hbucket(t, key);
+		for (i = 0; i < n->pos; i++) {
+			data = ahash_data(n, i);
+			if (type_pf_data_equal(data, d))
+				return 1;
+		}
+	}
+	return 0;
+}
+#endif
+
+/* Test whether the element is added to the set */
+static int
+type_pf_test(struct ip_set *set, void *value, u32 timeout)
+{
+	struct ip_set_hash *h = set->data;
+	struct htable *t = h->table;
+	struct type_pf_elem *d = value;
+	struct hbucket *n;
+	const struct type_pf_elem *data;
+	int i;
+	u32 key;
+
+#ifdef IP_SET_HASH_WITH_NETS
+	/* If we test an IP address and not a network address,
+	 * try all possible network sizes */
+	if (d->cidr == SET_HOST_MASK(set->family))
+		return type_pf_test_cidrs(set, d, timeout);
+#endif
+
+	key = HKEY(d, h->initval, t->htable_bits);
+	n = hbucket(t, key);
+	for (i = 0; i < n->pos; i++) {
+		data = ahash_data(n, i);
+		if (type_pf_data_equal(data, d))
+			return 1;
+	}
+	return 0;
+}
+
+/* Reply a HEADER request: fill out the header part of the set */
+static int
+type_pf_head(struct ip_set *set, struct sk_buff *skb)
+{
+	const struct ip_set_hash *h = set->data;
+	struct nlattr *nested;
+	size_t memsize;
+
+	read_lock_bh(&set->lock);
+	memsize = ahash_memsize(h, with_timeout(h->timeout)
+					? sizeof(struct type_pf_telem)
+					: sizeof(struct type_pf_elem),
+				set->family == AF_INET ? 32 : 128);
+	read_unlock_bh(&set->lock);
+
+	nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
+	if (!nested)
+		goto nla_put_failure;
+	NLA_PUT_NET32(skb, IPSET_ATTR_HASHSIZE,
+		      htonl(jhash_size(h->table->htable_bits)));
+	NLA_PUT_NET32(skb, IPSET_ATTR_MAXELEM, htonl(h->maxelem));
+#ifdef IP_SET_HASH_WITH_NETMASK
+	if (h->netmask != HOST_MASK)
+		NLA_PUT_U8(skb, IPSET_ATTR_NETMASK, h->netmask);
+#endif
+	NLA_PUT_NET32(skb, IPSET_ATTR_REFERENCES,
+		      htonl(atomic_read(&set->ref) - 1));
+	NLA_PUT_NET32(skb, IPSET_ATTR_MEMSIZE, htonl(memsize));
+	if (with_timeout(h->timeout))
+		NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT, htonl(h->timeout));
+	ipset_nest_end(skb, nested);
+
+	return 0;
+nla_put_failure:
+	return -EMSGSIZE;
+}
+
+/* Reply a LIST/SAVE request: dump the elements of the specified set */
+static int
+type_pf_list(const struct ip_set *set,
+	     struct sk_buff *skb, struct netlink_callback *cb)
+{
+	const struct ip_set_hash *h = set->data;
+	const struct htable *t = h->table;
+	struct nlattr *atd, *nested;
+	const struct hbucket *n;
+	const struct type_pf_elem *data;
+	u32 first = cb->args[2];
+	/* We assume that one hash bucket fills into one page */
+	void *incomplete;
+	int i;
+
+	atd = ipset_nest_start(skb, IPSET_ATTR_ADT);
+	if (!atd)
+		return -EMSGSIZE;
+	pr_debug("list hash set %s\n", set->name);
+	for (; cb->args[2] < jhash_size(t->htable_bits); cb->args[2]++) {
+		incomplete = skb_tail_pointer(skb);
+		n = hbucket(t, cb->args[2]);
+		pr_debug("cb->args[2]: %lu, t %p n %p\n", cb->args[2], t, n);
+		for (i = 0; i < n->pos; i++) {
+			data = ahash_data(n, i);
+			pr_debug("list hash %lu hbucket %p i %u, data %p\n",
+				 cb->args[2], n, i, data);
+			nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
+			if (!nested) {
+				if (cb->args[2] == first) {
+					nla_nest_cancel(skb, atd);
+					return -EMSGSIZE;
+				} else
+					goto nla_put_failure;
+			}
+			if (type_pf_data_list(skb, data))
+				goto nla_put_failure;
+			ipset_nest_end(skb, nested);
+		}
+	}
+	ipset_nest_end(skb, atd);
+	/* Set listing finished */
+	cb->args[2] = 0;
+
+	return 0;
+
+nla_put_failure:
+	nlmsg_trim(skb, incomplete);
+	ipset_nest_end(skb, atd);
+	if (unlikely(first == cb->args[2])) {
+		pr_warning("Can't list set %s: one bucket does not fit into "
+			   "a message. Please report it!\n", set->name);
+		cb->args[2] = 0;
+		return -EMSGSIZE;
+	}
+	return 0;
+}
+
+static int
+type_pf_kadt(struct ip_set *set, const struct sk_buff * skb,
+	     enum ipset_adt adt, u8 pf, u8 dim, u8 flags);
+static int
+type_pf_uadt(struct ip_set *set, struct nlattr *tb[],
+	     enum ipset_adt adt, u32 *lineno, u32 flags);
+
+static const struct ip_set_type_variant type_pf_variant = {
+	.kadt	= type_pf_kadt,
+	.uadt	= type_pf_uadt,
+	.adt	= {
+		[IPSET_ADD] = type_pf_add,
+		[IPSET_DEL] = type_pf_del,
+		[IPSET_TEST] = type_pf_test,
+	},
+	.destroy = type_pf_destroy,
+	.flush	= type_pf_flush,
+	.head	= type_pf_head,
+	.list	= type_pf_list,
+	.resize	= type_pf_resize,
+	.same_set = type_pf_same_set,
+};
+
+/* Flavour with timeout support */
+
+#define ahash_tdata(n, i) \
+	(struct type_pf_elem *)((struct type_pf_telem *)((n)->value) + (i))
+
+static inline u32
+type_pf_data_timeout(const struct type_pf_elem *data)
+{
+	const struct type_pf_telem *tdata =
+		(const struct type_pf_telem *) data;
+
+	return tdata->timeout;
+}
+
+static inline bool
+type_pf_data_expired(const struct type_pf_elem *data)
+{
+	const struct type_pf_telem *tdata =
+		(const struct type_pf_telem *) data;
+
+	return ip_set_timeout_expired(tdata->timeout);
+}
+
+static inline void
+type_pf_data_timeout_set(struct type_pf_elem *data, u32 timeout)
+{
+	struct type_pf_telem *tdata = (struct type_pf_telem *) data;
+
+	tdata->timeout = ip_set_timeout_set(timeout);
+}
+
+static int
+type_pf_elem_tadd(struct hbucket *n, const struct type_pf_elem *value,
+		  u32 timeout)
+{
+	struct type_pf_elem *data;
+
+	if (n->pos >= n->size) {
+		void *tmp;
+
+		if (n->size >= AHASH_MAX_SIZE)
+			/* Trigger rehashing */
+			return -EAGAIN;
+
+		tmp = kzalloc((n->size + AHASH_INIT_SIZE)
+			      * sizeof(struct type_pf_telem),
+			      GFP_ATOMIC);
+		if (!tmp)
+			return -ENOMEM;
+		if (n->size) {
+			memcpy(tmp, n->value,
+			       sizeof(struct type_pf_telem) * n->size);
+			kfree(n->value);
+		}
+		n->value = tmp;
+		n->size += AHASH_INIT_SIZE;
+	}
+	data = ahash_tdata(n, n->pos++);
+	type_pf_data_copy(data, value);
+	type_pf_data_timeout_set(data, timeout);
+	return 0;
+}
+
+/* Delete expired elements from the hashtable */
+static void
+type_pf_expire(struct ip_set_hash *h)
+{
+	struct htable *t = h->table;
+	struct hbucket *n;
+	struct type_pf_elem *data;
+	u32 i;
+	int j;
+
+	for (i = 0; i < jhash_size(t->htable_bits); i++) {
+		n = hbucket(t, i);
+		for (j = 0; j < n->pos; j++) {
+			data = ahash_tdata(n, j);
+			if (type_pf_data_expired(data)) {
+				pr_debug("expired %u/%u\n", i, j);
+#ifdef IP_SET_HASH_WITH_NETS
+				del_cidr(h, data->cidr, HOST_MASK);
+#endif
+				if (j != n->pos - 1)
+					/* Not last one */
+					type_pf_data_copy(data,
+						ahash_tdata(n, n->pos - 1));
+				n->pos--;
+				h->elements--;
+			}
+		}
+		if (n->pos + AHASH_INIT_SIZE < n->size) {
+			void *tmp = kzalloc((n->size - AHASH_INIT_SIZE)
+					    * sizeof(struct type_pf_telem),
+					    GFP_ATOMIC);
+			if (!tmp)
+				/* Still try to delete expired elements */
+				continue;
+			n->size -= AHASH_INIT_SIZE;
+			memcpy(tmp, n->value,
+			       n->size * sizeof(struct type_pf_telem));
+			kfree(n->value);
+			n->value = tmp;
+		}
+	}
+}
+
+static int
+type_pf_tresize(struct ip_set *set, bool retried)
+{
+	struct ip_set_hash *h = set->data;
+	struct htable *t, *orig = h->table;
+	u8 htable_bits = orig->htable_bits;
+	const struct type_pf_elem *data;
+	struct hbucket *n, *m;
+	u32 i, j;
+	int ret;
+
+	/* Try to cleanup once */
+	if (!retried) {
+		i = h->elements;
+		write_lock_bh(&set->lock);
+		type_pf_expire(set->data);
+		write_unlock_bh(&set->lock);
+		if (h->elements <  i)
+			return 0;
+	}
+
+retry:
+	ret = 0;
+	htable_bits++;
+	if (!htable_bits)
+		/* In case we have plenty of memory :-) */
+		return -IPSET_ERR_HASH_FULL;
+	t = ip_set_alloc(sizeof(*t)
+			 + jhash_size(htable_bits) * sizeof(struct hbucket));
+	if (!t)
+		return -ENOMEM;
+	t->htable_bits = htable_bits;
+
+	read_lock_bh(&set->lock);
+	for (i = 0; i < jhash_size(orig->htable_bits); i++) {
+		n = hbucket(orig, i);
+		for (j = 0; j < n->pos; j++) {
+			data = ahash_tdata(n, j);
+			m = hbucket(t, HKEY(data, h->initval, htable_bits));
+			ret = type_pf_elem_tadd(m, data,
+						type_pf_data_timeout(data));
+			if (ret < 0) {
+				read_unlock_bh(&set->lock);
+				ahash_destroy(t);
+				if (ret == -EAGAIN)
+					goto retry;
+				return ret;
+			}
+		}
+	}
+
+	rcu_assign_pointer(h->table, t);
+	read_unlock_bh(&set->lock);
+
+	/* Give time to other readers of the set */
+	synchronize_rcu_bh();
+
+	ahash_destroy(orig);
+
+	return 0;
+}
+
+static int
+type_pf_tadd(struct ip_set *set, void *value, u32 timeout)
+{
+	struct ip_set_hash *h = set->data;
+	struct htable *t = h->table;
+	const struct type_pf_elem *d = value;
+	struct hbucket *n;
+	struct type_pf_elem *data;
+	int ret = 0, i, j = AHASH_MAX_SIZE + 1;
+	u32 key;
+
+	if (h->elements >= h->maxelem)
+		/* FIXME: when set is full, we slow down here */
+		type_pf_expire(h);
+	if (h->elements >= h->maxelem)
+		return -IPSET_ERR_HASH_FULL;
+
+	rcu_read_lock_bh();
+	t = rcu_dereference_bh(h->table);
+	key = HKEY(d, h->initval, t->htable_bits);
+	n = hbucket(t, key);
+	for (i = 0; i < n->pos; i++) {
+		data = ahash_tdata(n, i);
+		if (type_pf_data_equal(data, d)) {
+			if (type_pf_data_expired(data))
+				j = i;
+			else {
+				ret = -IPSET_ERR_EXIST;
+				goto out;
+			}
+		} else if (j == AHASH_MAX_SIZE + 1 &&
+			   type_pf_data_expired(data))
+			j = i;
+	}
+	if (j != AHASH_MAX_SIZE + 1) {
+		data = ahash_tdata(n, j);
+#ifdef IP_SET_HASH_WITH_NETS
+		del_cidr(h, data->cidr, HOST_MASK);
+		add_cidr(h, d->cidr, HOST_MASK);
+#endif
+		type_pf_data_copy(data, d);
+		type_pf_data_timeout_set(data, timeout);
+		goto out;
+	}
+	ret = type_pf_elem_tadd(n, d, timeout);
+	if (ret != 0)
+		goto out;
+
+#ifdef IP_SET_HASH_WITH_NETS
+	add_cidr(h, d->cidr, HOST_MASK);
+#endif
+	h->elements++;
+out:
+	rcu_read_unlock_bh();
+	return ret;
+}
+
+static int
+type_pf_tdel(struct ip_set *set, void *value, u32 timeout)
+{
+	struct ip_set_hash *h = set->data;
+	struct htable *t = h->table;
+	const struct type_pf_elem *d = value;
+	struct hbucket *n;
+	int i, ret = 0;
+	struct type_pf_elem *data;
+	u32 key;
+
+	key = HKEY(value, h->initval, t->htable_bits);
+	n = hbucket(t, key);
+	for (i = 0; i < n->pos; i++) {
+		data = ahash_tdata(n, i);
+		if (!type_pf_data_equal(data, d))
+			continue;
+		if (type_pf_data_expired(data))
+			ret = -IPSET_ERR_EXIST;
+		if (i != n->pos - 1)
+			/* Not last one */
+			type_pf_data_copy(data, ahash_tdata(n, n->pos - 1));
+
+		n->pos--;
+		h->elements--;
+#ifdef IP_SET_HASH_WITH_NETS
+		del_cidr(h, d->cidr, HOST_MASK);
+#endif
+		if (n->pos + AHASH_INIT_SIZE < n->size) {
+			void *tmp = kzalloc((n->size - AHASH_INIT_SIZE)
+					    * sizeof(struct type_pf_telem),
+					    GFP_ATOMIC);
+			if (!tmp)
+				return 0;
+			n->size -= AHASH_INIT_SIZE;
+			memcpy(tmp, n->value,
+			       n->size * sizeof(struct type_pf_telem));
+			kfree(n->value);
+			n->value = tmp;
+		}
+		return 0;
+	}
+
+	return -IPSET_ERR_EXIST;
+}
+
+#ifdef IP_SET_HASH_WITH_NETS
+static int
+type_pf_ttest_cidrs(struct ip_set *set, struct type_pf_elem *d, u32 timeout)
+{
+	struct ip_set_hash *h = set->data;
+	struct htable *t = h->table;
+	struct type_pf_elem *data;
+	struct hbucket *n;
+	int i, j = 0;
+	u32 key;
+	u8 host_mask = SET_HOST_MASK(set->family);
+
+	for (; j < host_mask && h->nets[j].cidr; j++) {
+		type_pf_data_netmask(d, h->nets[j].cidr);
+		key = HKEY(d, h->initval, t->htable_bits);
+		n = hbucket(t, key);
+		for (i = 0; i < n->pos; i++) {
+			data = ahash_tdata(n, i);
+			if (type_pf_data_equal(data, d))
+				return !type_pf_data_expired(data);
+		}
+	}
+	return 0;
+}
+#endif
+
+static int
+type_pf_ttest(struct ip_set *set, void *value, u32 timeout)
+{
+	struct ip_set_hash *h = set->data;
+	struct htable *t = h->table;
+	struct type_pf_elem *data, *d = value;
+	struct hbucket *n;
+	int i;
+	u32 key;
+
+#ifdef IP_SET_HASH_WITH_NETS
+	if (d->cidr == SET_HOST_MASK(set->family))
+		return type_pf_ttest_cidrs(set, d, timeout);
+#endif
+	key = HKEY(d, h->initval, t->htable_bits);
+	n = hbucket(t, key);
+	for (i = 0; i < n->pos; i++) {
+		data = ahash_tdata(n, i);
+		if (type_pf_data_equal(data, d))
+			return !type_pf_data_expired(data);
+	}
+	return 0;
+}
+
+static int
+type_pf_tlist(const struct ip_set *set,
+	      struct sk_buff *skb, struct netlink_callback *cb)
+{
+	const struct ip_set_hash *h = set->data;
+	const struct htable *t = h->table;
+	struct nlattr *atd, *nested;
+	const struct hbucket *n;
+	const struct type_pf_elem *data;
+	u32 first = cb->args[2];
+	/* We assume that one hash bucket fills into one page */
+	void *incomplete;
+	int i;
+
+	atd = ipset_nest_start(skb, IPSET_ATTR_ADT);
+	if (!atd)
+		return -EMSGSIZE;
+	for (; cb->args[2] < jhash_size(t->htable_bits); cb->args[2]++) {
+		incomplete = skb_tail_pointer(skb);
+		n = hbucket(t, cb->args[2]);
+		for (i = 0; i < n->pos; i++) {
+			data = ahash_tdata(n, i);
+			pr_debug("list %p %u\n", n, i);
+			if (type_pf_data_expired(data))
+				continue;
+			pr_debug("do list %p %u\n", n, i);
+			nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
+			if (!nested) {
+				if (cb->args[2] == first) {
+					nla_nest_cancel(skb, atd);
+					return -EMSGSIZE;
+				} else
+					goto nla_put_failure;
+			}
+			if (type_pf_data_tlist(skb, data))
+				goto nla_put_failure;
+			ipset_nest_end(skb, nested);
+		}
+	}
+	ipset_nest_end(skb, atd);
+	/* Set listing finished */
+	cb->args[2] = 0;
+
+	return 0;
+
+nla_put_failure:
+	nlmsg_trim(skb, incomplete);
+	ipset_nest_end(skb, atd);
+	if (unlikely(first == cb->args[2])) {
+		pr_warning("Can't list set %s: one bucket does not fit into "
+			   "a message. Please report it!\n", set->name);
+		cb->args[2] = 0;
+		return -EMSGSIZE;
+	}
+	return 0;
+}
+
+static const struct ip_set_type_variant type_pf_tvariant = {
+	.kadt	= type_pf_kadt,
+	.uadt	= type_pf_uadt,
+	.adt	= {
+		[IPSET_ADD] = type_pf_tadd,
+		[IPSET_DEL] = type_pf_tdel,
+		[IPSET_TEST] = type_pf_ttest,
+	},
+	.destroy = type_pf_destroy,
+	.flush	= type_pf_flush,
+	.head	= type_pf_head,
+	.list	= type_pf_tlist,
+	.resize	= type_pf_tresize,
+	.same_set = type_pf_same_set,
+};
+
+static void
+type_pf_gc(unsigned long ul_set)
+{
+	struct ip_set *set = (struct ip_set *) ul_set;
+	struct ip_set_hash *h = set->data;
+
+	pr_debug("called\n");
+	write_lock_bh(&set->lock);
+	type_pf_expire(h);
+	write_unlock_bh(&set->lock);
+
+	h->gc.expires = jiffies + IPSET_GC_PERIOD(h->timeout) * HZ;
+	add_timer(&h->gc);
+}
+
+static void
+type_pf_gc_init(struct ip_set *set)
+{
+	struct ip_set_hash *h = set->data;
+
+	init_timer(&h->gc);
+	h->gc.data = (unsigned long) set;
+	h->gc.function = type_pf_gc;
+	h->gc.expires = jiffies + IPSET_GC_PERIOD(h->timeout) * HZ;
+	add_timer(&h->gc);
+	pr_debug("gc initialized, run in every %u\n",
+		 IPSET_GC_PERIOD(h->timeout));
+}
+
+#undef type_pf_data_equal
+#undef type_pf_data_isnull
+#undef type_pf_data_copy
+#undef type_pf_data_zero_out
+#undef type_pf_data_list
+#undef type_pf_data_tlist
+
+#undef type_pf_elem
+#undef type_pf_telem
+#undef type_pf_data_timeout
+#undef type_pf_data_expired
+#undef type_pf_data_netmask
+#undef type_pf_data_timeout_set
+
+#undef type_pf_elem_add
+#undef type_pf_add
+#undef type_pf_del
+#undef type_pf_test_cidrs
+#undef type_pf_test
+
+#undef type_pf_elem_tadd
+#undef type_pf_expire
+#undef type_pf_tadd
+#undef type_pf_tdel
+#undef type_pf_ttest_cidrs
+#undef type_pf_ttest
+
+#undef type_pf_resize
+#undef type_pf_tresize
+#undef type_pf_flush
+#undef type_pf_destroy
+#undef type_pf_head
+#undef type_pf_list
+#undef type_pf_tlist
+#undef type_pf_same_set
+#undef type_pf_kadt
+#undef type_pf_uadt
+#undef type_pf_gc
+#undef type_pf_gc_init
+#undef type_pf_variant
+#undef type_pf_tvariant

include/linux/netfilter/ipset/ip_set_bitmap.h

···
+#ifndef __IP_SET_BITMAP_H
+#define __IP_SET_BITMAP_H
+
+/* Bitmap type specific error codes */
+enum {
+	/* The element is out of the range of the set */
+	IPSET_ERR_BITMAP_RANGE = IPSET_ERR_TYPE_SPECIFIC,
+	/* The range exceeds the size limit of the set type */
+	IPSET_ERR_BITMAP_RANGE_SIZE,
+};
+
+#ifdef __KERNEL__
+#define IPSET_BITMAP_MAX_RANGE	0x0000FFFF
+
+/* Common functions */
+
+static inline u32
+range_to_mask(u32 from, u32 to, u8 *bits)
+{
+	u32 mask = 0xFFFFFFFE;
+
+	*bits = 32;
+	while (--(*bits) > 0 && mask && (to & mask) != from)
+		mask <<= 1;
+
+	return mask;
+}
+
+#endif /* __KERNEL__ */
+
+#endif /* __IP_SET_BITMAP_H */

include/linux/netfilter/ipset/ip_set_getport.h

···
+#ifndef _IP_SET_GETPORT_H
+#define _IP_SET_GETPORT_H
+
+extern bool ip_set_get_ip4_port(const struct sk_buff *skb, bool src,
+				__be16 *port, u8 *proto);
+
+#if defined(CONFIG_IP6_NF_IPTABLES) || defined(CONFIG_IP6_NF_IPTABLES_MODULE)
+extern bool ip_set_get_ip6_port(const struct sk_buff *skb, bool src,
+				__be16 *port, u8 *proto);
+#else
+static inline bool ip_set_get_ip6_port(const struct sk_buff *skb, bool src,
+				       __be16 *port, u8 *proto)
+{
+	return false;
+}
+#endif
+
+extern bool ip_set_get_ip_port(const struct sk_buff *skb, u8 pf, bool src,
+				__be16 *port);
+
+#endif /*_IP_SET_GETPORT_H*/

include/linux/netfilter/ipset/ip_set_hash.h

···
+#ifndef __IP_SET_HASH_H
+#define __IP_SET_HASH_H
+
+/* Hash type specific error codes */
+enum {
+	/* Hash is full */
+	IPSET_ERR_HASH_FULL = IPSET_ERR_TYPE_SPECIFIC,
+	/* Null-valued element */
+	IPSET_ERR_HASH_ELEM,
+	/* Invalid protocol */
+	IPSET_ERR_INVALID_PROTO,
+	/* Protocol missing but must be specified */
+	IPSET_ERR_MISSING_PROTO,
+};
+
+#ifdef __KERNEL__
+
+#define IPSET_DEFAULT_HASHSIZE		1024
+#define IPSET_MIMINAL_HASHSIZE		64
+#define IPSET_DEFAULT_MAXELEM		65536
+#define IPSET_DEFAULT_PROBES		4
+#define IPSET_DEFAULT_RESIZE		100
+
+#endif /* __KERNEL__ */
+
+#endif /* __IP_SET_HASH_H */

include/linux/netfilter/ipset/ip_set_list.h

···
+#ifndef __IP_SET_LIST_H
+#define __IP_SET_LIST_H
+
+/* List type specific error codes */
+enum {
+	/* Set name to be added/deleted/tested does not exist. */
+	IPSET_ERR_NAME = IPSET_ERR_TYPE_SPECIFIC,
+	/* list:set type is not permitted to add */
+	IPSET_ERR_LOOP,
+	/* Missing reference set */
+	IPSET_ERR_BEFORE,
+	/* Reference set does not exist */
+	IPSET_ERR_NAMEREF,
+	/* Set is full */
+	IPSET_ERR_LIST_FULL,
+	/* Reference set is not added to the set */
+	IPSET_ERR_REF_EXIST,
+};
+
+#ifdef __KERNEL__
+
+#define IP_SET_LIST_DEFAULT_SIZE	8
+#define IP_SET_LIST_MIN_SIZE		4
+
+#endif /* __KERNEL__ */
+
+#endif /* __IP_SET_LIST_H */

include/linux/netfilter/ipset/ip_set_timeout.h

···
+#ifndef _IP_SET_TIMEOUT_H
+#define _IP_SET_TIMEOUT_H
+
+/* Copyright (C) 2003-2011 Jozsef Kadlecsik <[e-mail]>
+ *
+ * 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.
+ */
+
+#ifdef __KERNEL__
+
+/* How often should the gc be run by default */
+#define IPSET_GC_TIME			(3 * 60)
+
+/* Timeout period depending on the timeout value of the given set */
+#define IPSET_GC_PERIOD(timeout) \
+	((timeout/3) ? min_t(u32, (timeout)/3, IPSET_GC_TIME) : 1)
+
+/* Set is defined without timeout support: timeout value may be 0 */
+#define IPSET_NO_TIMEOUT	UINT_MAX
+
+#define with_timeout(timeout)	((timeout) != IPSET_NO_TIMEOUT)
+
+static inline unsigned int
+ip_set_timeout_uget(struct nlattr *tb)
+{
+	unsigned int timeout = ip_set_get_h32(tb);
+
+	/* Userspace supplied TIMEOUT parameter: adjust crazy size */
+	return timeout == IPSET_NO_TIMEOUT ? IPSET_NO_TIMEOUT - 1 : timeout;
+}
+
+#ifdef IP_SET_BITMAP_TIMEOUT
+
+/* Bitmap specific timeout constants and macros for the entries */
+
+/* Bitmap entry is unset */
+#define IPSET_ELEM_UNSET	0
+/* Bitmap entry is set with no timeout value */
+#define IPSET_ELEM_PERMANENT	(UINT_MAX/2)
+
+static inline bool
+ip_set_timeout_test(unsigned long timeout)
+{
+	return timeout != IPSET_ELEM_UNSET &&
+	       (timeout == IPSET_ELEM_PERMANENT ||
+		time_after(timeout, jiffies));
+}
+
+static inline bool
+ip_set_timeout_expired(unsigned long timeout)
+{
+	return timeout != IPSET_ELEM_UNSET &&
+	       timeout != IPSET_ELEM_PERMANENT &&
+	       time_before(timeout, jiffies);
+}
+
+static inline unsigned long
+ip_set_timeout_set(u32 timeout)
+{
+	unsigned long t;
+
+	if (!timeout)
+		return IPSET_ELEM_PERMANENT;
+
+	t = timeout * HZ + jiffies;
+	if (t == IPSET_ELEM_UNSET || t == IPSET_ELEM_PERMANENT)
+		/* Bingo! */
+		t++;
+
+	return t;
+}
+
+static inline u32
+ip_set_timeout_get(unsigned long timeout)
+{
+	return timeout == IPSET_ELEM_PERMANENT ? 0 : (timeout - jiffies)/HZ;
+}
+
+#else
+
+/* Hash specific timeout constants and macros for the entries */
+
+/* Hash entry is set with no timeout value */
+#define IPSET_ELEM_PERMANENT	0
+
+static inline bool
+ip_set_timeout_test(unsigned long timeout)
+{
+	return timeout == IPSET_ELEM_PERMANENT ||
+	       time_after(timeout, jiffies);
+}
+
+static inline bool
+ip_set_timeout_expired(unsigned long timeout)
+{
+	return timeout != IPSET_ELEM_PERMANENT &&
+	       time_before(timeout, jiffies);
+}
+
+static inline unsigned long
+ip_set_timeout_set(u32 timeout)
+{
+	unsigned long t;
+
+	if (!timeout)
+		return IPSET_ELEM_PERMANENT;
+
+	t = timeout * HZ + jiffies;
+	if (t == IPSET_ELEM_PERMANENT)
+		/* Bingo! :-) */
+		t++;
+
+	return t;
+}
+
+static inline u32
+ip_set_timeout_get(unsigned long timeout)
+{
+	return timeout == IPSET_ELEM_PERMANENT ? 0 : (timeout - jiffies)/HZ;
+}
+#endif /* ! IP_SET_BITMAP_TIMEOUT */
+
+#endif	/* __KERNEL__ */
+
+#endif /* _IP_SET_TIMEOUT_H */

include/linux/netfilter/ipset/pfxlen.h

···
+#ifndef _PFXLEN_H
+#define _PFXLEN_H
+
+#include <asm/byteorder.h>
+#include <linux/netfilter.h> 
+
+/* Prefixlen maps, by Jan Engelhardt  */
+extern const union nf_inet_addr ip_set_netmask_map[];
+extern const union nf_inet_addr ip_set_hostmask_map[];
+
+static inline __be32
+ip_set_netmask(u8 pfxlen)
+{
+	return ip_set_netmask_map[pfxlen].ip;
+}
+
+static inline const __be32 *
+ip_set_netmask6(u8 pfxlen)
+{
+	return &ip_set_netmask_map[pfxlen].ip6[0];
+}
+
+static inline u32
+ip_set_hostmask(u8 pfxlen)
+{
+	return (__force u32) ip_set_hostmask_map[pfxlen].ip;
+}
+
+static inline const __be32 *
+ip_set_hostmask6(u8 pfxlen)
+{
+	return &ip_set_hostmask_map[pfxlen].ip6[0];
+}
+
+#endif /*_PFXLEN_H */

include/linux/netfilter/nfnetlink.h

···
 #define NFNL_SUBSYS_QUEUE		3
 #define NFNL_SUBSYS_ULOG		4
 #define NFNL_SUBSYS_OSF			5
-#define NFNL_SUBSYS_COUNT		6
+#define NFNL_SUBSYS_IPSET		6
+#define NFNL_SUBSYS_COUNT		7
 
 #ifdef __KERNEL__
 

include/linux/netfilter/xt_devgroup.h

···
+#ifndef _XT_DEVGROUP_H
+#define _XT_DEVGROUP_H
+
+#include <linux/types.h>
+
+enum xt_devgroup_flags {
+	XT_DEVGROUP_MATCH_SRC	= 0x1,
+	XT_DEVGROUP_INVERT_SRC	= 0x2,
+	XT_DEVGROUP_MATCH_DST	= 0x4,
+	XT_DEVGROUP_INVERT_DST	= 0x8,
+};
+
+struct xt_devgroup_info {
+	__u32	flags;
+	__u32	src_group;
+	__u32	src_mask;
+	__u32	dst_group;
+	__u32	dst_mask;
+};
+
+#endif /* _XT_DEVGROUP_H */

include/linux/netfilter/xt_set.h

···
+#ifndef _XT_SET_H
+#define _XT_SET_H
+
+#include <linux/types.h>
+#include <linux/netfilter/ipset/ip_set.h>
+
+/* Revision 0 interface: backward compatible with netfilter/iptables */
+
+/*
+ * Option flags for kernel operations (xt_set_info_v0)
+ */
+#define IPSET_SRC		0x01	/* Source match/add */
+#define IPSET_DST		0x02	/* Destination match/add */
+#define IPSET_MATCH_INV		0x04	/* Inverse matching */
+
+struct xt_set_info_v0 {
+	ip_set_id_t index;
+	union {
+		__u32 flags[IPSET_DIM_MAX + 1];
+		struct {
+			__u32 __flags[IPSET_DIM_MAX];
+			__u8 dim;
+			__u8 flags;
+		} compat;
+	} u;
+};
+
+/* match and target infos */
+struct xt_set_info_match_v0 {
+	struct xt_set_info_v0 match_set;
+};
+
+struct xt_set_info_target_v0 {
+	struct xt_set_info_v0 add_set;
+	struct xt_set_info_v0 del_set;
+};
+
+/* Revision 1: current interface to netfilter/iptables */
+
+struct xt_set_info {
+	ip_set_id_t index;
+	__u8 dim;
+	__u8 flags;
+};
+
+/* match and target infos */
+struct xt_set_info_match {
+	struct xt_set_info match_set;
+};
+
+struct xt_set_info_target {
+	struct xt_set_info add_set;
+	struct xt_set_info del_set;
+};
+
+#endif /*_XT_SET_H*/

include/net/ip_vs.h

···
  *	we are loaded. Just set ip_vs_drop_rate to 'n' and
  *	we start to drop 1/rate of the packets
  */
-extern int ip_vs_drop_rate;
-extern int ip_vs_drop_counter;
 
 static inline int ip_vs_todrop(struct netns_ipvs *ipvs)
 {

include/net/netlink.h

···
 #define NLA_PUT_BE16(skb, attrtype, value) \
 	NLA_PUT_TYPE(skb, __be16, attrtype, value)
 
+#define NLA_PUT_NET16(skb, attrtype, value) \
+	NLA_PUT_BE16(skb, attrtype | NLA_F_NET_BYTEORDER, value)
+
 #define NLA_PUT_U32(skb, attrtype, value) \
 	NLA_PUT_TYPE(skb, u32, attrtype, value)
 
 #define NLA_PUT_BE32(skb, attrtype, value) \
 	NLA_PUT_TYPE(skb, __be32, attrtype, value)
 
+#define NLA_PUT_NET32(skb, attrtype, value) \
+	NLA_PUT_BE32(skb, attrtype | NLA_F_NET_BYTEORDER, value)
+
 #define NLA_PUT_U64(skb, attrtype, value) \
 	NLA_PUT_TYPE(skb, u64, attrtype, value)
 
 #define NLA_PUT_BE64(skb, attrtype, value) \
 	NLA_PUT_TYPE(skb, __be64, attrtype, value)
+
+#define NLA_PUT_NET64(skb, attrtype, value) \
+	NLA_PUT_BE64(skb, attrtype | NLA_F_NET_BYTEORDER, value)
 
 #define NLA_PUT_STRING(skb, attrtype, value) \
 	NLA_PUT(skb, attrtype, strlen(value) + 1, value)

net/netfilter/Kconfig

···
 	ctmark), similarly to the packet mark (nfmark). Using this
 	target and match, you can set and match on this mark.
 
+config NETFILTER_XT_SET
+	tristate 'set target and match support'
+	depends on IP_SET
+	depends on NETFILTER_ADVANCED
+	help
+	  This option adds the "SET" target and "set" match.
+
+	  Using this target and match, you can add/delete and match
+	  elements in the sets created by ipset(8).
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
 # alphabetically ordered list of targets
 
 comment "Xtables targets"
···
 	  If you want to compile it as a module, say M here and read
 	  <file:Documentation/kbuild/modules.txt>.  If unsure, say `N'.
 
+config NETFILTER_XT_MATCH_DEVGROUP
+	tristate '"devgroup" match support'
+	depends on NETFILTER_ADVANCED
+	help
+	  This options adds a `devgroup' match, which allows to match on the
+	  device group a network device is assigned to.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
 config NETFILTER_XT_MATCH_DSCP
 	tristate '"dscp" and "tos" match support'
 	depends on NETFILTER_ADVANCED
···
 endif # NETFILTER_XTABLES
 
 endmenu
+
+source "net/netfilter/ipset/Kconfig"
 
 source "net/netfilter/ipvs/Kconfig"

net/netfilter/Makefile

···
 # combos
 obj-$(CONFIG_NETFILTER_XT_MARK) += xt_mark.o
 obj-$(CONFIG_NETFILTER_XT_CONNMARK) += xt_connmark.o
+obj-$(CONFIG_NETFILTER_XT_SET) += xt_set.o
 
 # targets
 obj-$(CONFIG_NETFILTER_XT_TARGET_AUDIT) += xt_AUDIT.o
···
 obj-$(CONFIG_NETFILTER_XT_MATCH_CONNTRACK) += xt_conntrack.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_CPU) += xt_cpu.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_DCCP) += xt_dccp.o
+obj-$(CONFIG_NETFILTER_XT_MATCH_DEVGROUP) += xt_devgroup.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_DSCP) += xt_dscp.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_ESP) += xt_esp.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_HASHLIMIT) += xt_hashlimit.o
···
 obj-$(CONFIG_NETFILTER_XT_MATCH_TCPMSS) += xt_tcpmss.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_TIME) += xt_time.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_U32) += xt_u32.o
+
+# ipset
+obj-$(CONFIG_IP_SET) += ipset/
 
 # IPVS
 obj-$(CONFIG_IP_VS) += ipvs/

net/netfilter/ipset/Kconfig

···
+menuconfig IP_SET
+	tristate "IP set support"
+	depends on INET && NETFILTER
+	help
+	  This option adds IP set support to the kernel.
+	  In order to define and use the sets, you need the userspace utility
+	  ipset(8). You can use the sets in netfilter via the "set" match
+	  and "SET" target.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+if IP_SET
+
+config IP_SET_MAX
+	int "Maximum number of IP sets"
+	default 256
+	range 2 65534
+	depends on IP_SET
+	help
+	  You can define here default value of the maximum number 
+	  of IP sets for the kernel.
+
+	  The value can be overriden by the 'max_sets' module
+	  parameter of the 'ip_set' module.
+
+config IP_SET_BITMAP_IP
+	tristate "bitmap:ip set support"
+	depends on IP_SET
+	help
+	  This option adds the bitmap:ip set type support, by which one
+	  can store IPv4 addresses (or network addresse) from a range.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config IP_SET_BITMAP_IPMAC
+	tristate "bitmap:ip,mac set support"
+	depends on IP_SET
+	help
+	  This option adds the bitmap:ip,mac set type support, by which one
+	  can store IPv4 address and (source) MAC address pairs from a range.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config IP_SET_BITMAP_PORT
+	tristate "bitmap:port set support"
+	depends on IP_SET
+	help
+	  This option adds the bitmap:port set type support, by which one
+	  can store TCP/UDP port numbers from a range.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config IP_SET_HASH_IP
+	tristate "hash:ip set support"
+	depends on IP_SET
+	help
+	  This option adds the hash:ip set type support, by which one
+	  can store arbitrary IPv4 or IPv6 addresses (or network addresses)
+	  in a set.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config IP_SET_HASH_IPPORT
+	tristate "hash:ip,port set support"
+	depends on IP_SET
+	help
+	  This option adds the hash:ip,port set type support, by which one
+	  can store IPv4/IPv6 address and protocol/port pairs.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config IP_SET_HASH_IPPORTIP
+	tristate "hash:ip,port,ip set support"
+	depends on IP_SET
+	help
+	  This option adds the hash:ip,port,ip set type support, by which
+	  one can store IPv4/IPv6 address, protocol/port, and IPv4/IPv6
+	  address triples in a set.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config IP_SET_HASH_IPPORTNET
+	tristate "hash:ip,port,net set support"
+	depends on IP_SET
+	help
+	  This option adds the hash:ip,port,net set type support, by which
+	  one can store IPv4/IPv6 address, protocol/port, and IPv4/IPv6
+	  network address/prefix triples in a set.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config IP_SET_HASH_NET
+	tristate "hash:net set support"
+	depends on IP_SET
+	help
+	  This option adds the hash:net set type support, by which
+	  one can store IPv4/IPv6 network address/prefix elements in a set.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config IP_SET_HASH_NETPORT
+	tristate "hash:net,port set support"
+	depends on IP_SET
+	help
+	  This option adds the hash:net,port set type support, by which
+	  one can store IPv4/IPv6 network address/prefix and
+	  protocol/port pairs as elements in a set.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config IP_SET_LIST_SET
+	tristate "list:set set support"
+	depends on IP_SET
+	help
+	  This option adds the list:set set type support. In this
+	  kind of set one can store the name of other sets and it forms
+	  an ordered union of the member sets.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+endif # IP_SET

net/netfilter/ipset/Makefile

···
+#
+# Makefile for the ipset modules
+#
+
+ip_set-y := ip_set_core.o ip_set_getport.o pfxlen.o
+
+# ipset core
+obj-$(CONFIG_IP_SET) += ip_set.o
+
+# bitmap types
+obj-$(CONFIG_IP_SET_BITMAP_IP) += ip_set_bitmap_ip.o
+obj-$(CONFIG_IP_SET_BITMAP_IPMAC) += ip_set_bitmap_ipmac.o
+obj-$(CONFIG_IP_SET_BITMAP_PORT) += ip_set_bitmap_port.o
+
+# hash types
+obj-$(CONFIG_IP_SET_HASH_IP) += ip_set_hash_ip.o
+obj-$(CONFIG_IP_SET_HASH_IPPORT) += ip_set_hash_ipport.o
+obj-$(CONFIG_IP_SET_HASH_IPPORTIP) += ip_set_hash_ipportip.o
+obj-$(CONFIG_IP_SET_HASH_IPPORTNET) += ip_set_hash_ipportnet.o
+obj-$(CONFIG_IP_SET_HASH_NET) += ip_set_hash_net.o
+obj-$(CONFIG_IP_SET_HASH_NETPORT) += ip_set_hash_netport.o
+
+# list types
+obj-$(CONFIG_IP_SET_LIST_SET) += ip_set_list_set.o

net/netfilter/ipset/ip_set_bitmap_ip.c

···
+/* Copyright (C) 2000-2002 Joakim Axelsson <[e-mail]>
+ *                         Patrick Schaaf <[e-mail]>
+ * Copyright (C) 2003-2011 Jozsef Kadlecsik <[e-mail]>
+ *
+ * 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 IP_SET_BITMAP_TIMEOUT
+#include <linux/netfilter/ipset/ip_set_timeout.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jozsef Kadlecsik <[e-mail]>");
+MODULE_DESCRIPTION("bitmap:ip type of IP sets");
+MODULE_ALIAS("ip_set_bitmap:ip");
+
+/* Type structure */
+struct bitmap_ip {
+	void *members;		/* the set members */
+	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 */
+	u8 netmask;		/* subnet netmask */
+	u32 timeout;		/* timeout parameter */
+	struct timer_list gc;	/* garbage collection */
+};
+
+/* Base variant */
+
+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;
+}
+
+static int
+bitmap_ip_test(struct ip_set *set, void *value, u32 timeout)
+{
+	const struct bitmap_ip *map = set->data;
+	u16 id = *(u16 *)value;
+
+	return !!test_bit(id, map->members);
+}
+
+static int
+bitmap_ip_add(struct ip_set *set, void *value, u32 timeout)
+{
+	struct bitmap_ip *map = set->data;
+	u16 id = *(u16 *)value;
+
+	if (test_and_set_bit(id, map->members))
+		return -IPSET_ERR_EXIST;
+
+	return 0;
+}
+
+static int
+bitmap_ip_del(struct ip_set *set, void *value, u32 timeout)
+{
+	struct bitmap_ip *map = set->data;
+	u16 id = *(u16 *)value;
+
+	if (!test_and_clear_bit(id, map->members))
+		return -IPSET_ERR_EXIST;
+
+	return 0;
+}
+
+static int
+bitmap_ip_list(const struct ip_set *set,
+	       struct sk_buff *skb, struct netlink_callback *cb)
+{
+	const struct bitmap_ip *map = set->data;
+	struct nlattr *atd, *nested;
+	u32 id, first = cb->args[2];
+
+	atd = ipset_nest_start(skb, IPSET_ATTR_ADT);
+	if (!atd)
+		return -EMSGSIZE;
+	for (; cb->args[2] < map->elements; cb->args[2]++) {
+		id = cb->args[2];
+		if (!test_bit(id, map->members))
+			continue;
+		nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
+		if (!nested) {
+			if (id == first) {
+				nla_nest_cancel(skb, atd);
+				return -EMSGSIZE;
+			} else
+				goto nla_put_failure;
+		}
+		NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP,
+				htonl(map->first_ip + id * map->hosts));
+		ipset_nest_end(skb, nested);
+	}
+	ipset_nest_end(skb, atd);
+	/* Set listing finished */
+	cb->args[2] = 0;
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(skb, nested);
+	ipset_nest_end(skb, atd);
+	if (unlikely(id == first)) {
+		cb->args[2] = 0;
+		return -EMSGSIZE;
+	}
+	return 0;
+}
+
+/* Timeout variant */
+
+static int
+bitmap_ip_ttest(struct ip_set *set, void *value, u32 timeout)
+{
+	const struct bitmap_ip *map = set->data;
+	const unsigned long *members = map->members;
+	u16 id = *(u16 *)value;
+
+	return ip_set_timeout_test(members[id]);
+}
+
+static int
+bitmap_ip_tadd(struct ip_set *set, void *value, u32 timeout)
+{
+	struct bitmap_ip *map = set->data;
+	unsigned long *members = map->members;
+	u16 id = *(u16 *)value;
+
+	if (ip_set_timeout_test(members[id]))
+		return -IPSET_ERR_EXIST;
+
+	members[id] = ip_set_timeout_set(timeout);
+
+	return 0;
+}
+
+static int
+bitmap_ip_tdel(struct ip_set *set, void *value, u32 timeout)
+{
+	struct bitmap_ip *map = set->data;
+	unsigned long *members = map->members;
+	u16 id = *(u16 *)value;
+	int ret = -IPSET_ERR_EXIST;
+
+	if (ip_set_timeout_test(members[id]))
+		ret = 0;
+
+	members[id] = IPSET_ELEM_UNSET;
+	return ret;
+}
+
+static int
+bitmap_ip_tlist(const struct ip_set *set,
+		struct sk_buff *skb, struct netlink_callback *cb)
+{
+	const struct bitmap_ip *map = set->data;
+	struct nlattr *adt, *nested;
+	u32 id, first = cb->args[2];
+	const unsigned long *members = map->members;
+
+	adt = ipset_nest_start(skb, IPSET_ATTR_ADT);
+	if (!adt)
+		return -EMSGSIZE;
+	for (; cb->args[2] < map->elements; cb->args[2]++) {
+		id = cb->args[2];
+		if (!ip_set_timeout_test(members[id]))
+			continue;
+		nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
+		if (!nested) {
+			if (id == first) {
+				nla_nest_cancel(skb, adt);
+				return -EMSGSIZE;
+			} else
+				goto nla_put_failure;
+		}
+		NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP,
+				htonl(map->first_ip + id * map->hosts));
+		NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
+			      htonl(ip_set_timeout_get(members[id])));
+		ipset_nest_end(skb, nested);
+	}
+	ipset_nest_end(skb, adt);
+
+	/* Set listing finished */
+	cb->args[2] = 0;
+
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(skb, nested);
+	ipset_nest_end(skb, adt);
+	if (unlikely(id == first)) {
+		cb->args[2] = 0;
+		return -EMSGSIZE;
+	}
+	return 0;
+}
+
+static int
+bitmap_ip_kadt(struct ip_set *set, const struct sk_buff *skb,
+	       enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
+{
+	struct bitmap_ip *map = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	u32 ip;
+
+	ip = ntohl(ip4addr(skb, flags & IPSET_DIM_ONE_SRC));
+	if (ip < map->first_ip || ip > map->last_ip)
+		return -IPSET_ERR_BITMAP_RANGE;
+
+	ip = ip_to_id(map, ip);
+
+	return adtfn(set, &ip, map->timeout);
+}
+
+static int
+bitmap_ip_uadt(struct ip_set *set, struct nlattr *tb[],
+	       enum ipset_adt adt, u32 *lineno, u32 flags)
+{
+	struct bitmap_ip *map = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	u32 timeout = map->timeout;
+	u32 ip, ip_to, id;
+	int ret = 0;
+
+	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 (ip < map->first_ip || ip > map->last_ip)
+		return -IPSET_ERR_BITMAP_RANGE;
+
+	if (tb[IPSET_ATTR_TIMEOUT]) {
+		if (!with_timeout(map->timeout))
+			return -IPSET_ERR_TIMEOUT;
+		timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
+	}
+
+	if (adt == IPSET_TEST) {
+		id = ip_to_id(map, ip);
+		return adtfn(set, &id, timeout);
+	}
+
+	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 > 32)
+			return -IPSET_ERR_INVALID_CIDR;
+		ip &= ip_set_hostmask(cidr);
+		ip_to = ip | ~ip_set_hostmask(cidr);
+	} else
+		ip_to = ip;
+
+	if (ip_to > map->last_ip)
+		return -IPSET_ERR_BITMAP_RANGE;
+
+	for (; !before(ip_to, ip); ip += map->hosts) {
+		id = ip_to_id(map, ip);
+		ret = adtfn(set, &id, timeout);;
+
+		if (ret && !ip_set_eexist(ret, flags))
+			return ret;
+		else
+			ret = 0;
+	}
+	return ret;
+}
+
+static void
+bitmap_ip_destroy(struct ip_set *set)
+{
+	struct bitmap_ip *map = set->data;
+
+	if (with_timeout(map->timeout))
+		del_timer_sync(&map->gc);
+
+	ip_set_free(map->members);
+	kfree(map);
+
+	set->data = NULL;
+}
+
+static void
+bitmap_ip_flush(struct ip_set *set)
+{
+	struct bitmap_ip *map = set->data;
+
+	memset(map->members, 0, map->memsize);
+}
+
+static int
+bitmap_ip_head(struct ip_set *set, struct sk_buff *skb)
+{
+	const struct bitmap_ip *map = set->data;
+	struct nlattr *nested;
+
+	nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
+	if (!nested)
+		goto nla_put_failure;
+	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, htonl(map->first_ip));
+	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP_TO, htonl(map->last_ip));
+	if (map->netmask != 32)
+		NLA_PUT_U8(skb, IPSET_ATTR_NETMASK, map->netmask);
+	NLA_PUT_NET32(skb, IPSET_ATTR_REFERENCES,
+		      htonl(atomic_read(&set->ref) - 1));
+	NLA_PUT_NET32(skb, IPSET_ATTR_MEMSIZE,
+		      htonl(sizeof(*map) + map->memsize));
+	if (with_timeout(map->timeout))
+		NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT, htonl(map->timeout));
+	ipset_nest_end(skb, nested);
+
+	return 0;
+nla_put_failure:
+	return -EMSGSIZE;
+}
+
+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;
+}
+
+static const struct ip_set_type_variant bitmap_ip = {
+	.kadt	= bitmap_ip_kadt,
+	.uadt	= bitmap_ip_uadt,
+	.adt	= {
+		[IPSET_ADD] = bitmap_ip_add,
+		[IPSET_DEL] = bitmap_ip_del,
+		[IPSET_TEST] = bitmap_ip_test,
+	},
+	.destroy = bitmap_ip_destroy,
+	.flush	= bitmap_ip_flush,
+	.head	= bitmap_ip_head,
+	.list	= bitmap_ip_list,
+	.same_set = bitmap_ip_same_set,
+};
+
+static const struct ip_set_type_variant bitmap_tip = {
+	.kadt	= bitmap_ip_kadt,
+	.uadt	= bitmap_ip_uadt,
+	.adt	= {
+		[IPSET_ADD] = bitmap_ip_tadd,
+		[IPSET_DEL] = bitmap_ip_tdel,
+		[IPSET_TEST] = bitmap_ip_ttest,
+	},
+	.destroy = bitmap_ip_destroy,
+	.flush	= bitmap_ip_flush,
+	.head	= bitmap_ip_head,
+	.list	= bitmap_ip_tlist,
+	.same_set = bitmap_ip_same_set,
+};
+
+static void
+bitmap_ip_gc(unsigned long ul_set)
+{
+	struct ip_set *set = (struct ip_set *) ul_set;
+	struct bitmap_ip *map = set->data;
+	unsigned long *table = map->members;
+	u32 id;
+
+	/* We run parallel with other readers (test element)
+	 * but adding/deleting new entries is locked out */
+	read_lock_bh(&set->lock);
+	for (id = 0; id < map->elements; id++)
+		if (ip_set_timeout_expired(table[id]))
+			table[id] = IPSET_ELEM_UNSET;
+	read_unlock_bh(&set->lock);
+
+	map->gc.expires = jiffies + IPSET_GC_PERIOD(map->timeout) * HZ;
+	add_timer(&map->gc);
+}
+
+static void
+bitmap_ip_gc_init(struct ip_set *set)
+{
+	struct bitmap_ip *map = set->data;
+
+	init_timer(&map->gc);
+	map->gc.data = (unsigned long) set;
+	map->gc.function = bitmap_ip_gc;
+	map->gc.expires = jiffies + IPSET_GC_PERIOD(map->timeout) * HZ;
+	add_timer(&map->gc);
+}
+
+/* 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;
+	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 = AF_INET;
+
+	return true;
+}
+
+static int
+bitmap_ip_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
+{
+	struct bitmap_ip *map;
+	u32 first_ip, last_ip, hosts, elements;
+	u8 netmask = 32;
+	int ret;
+
+	if (unlikely(!tb[IPSET_ATTR_IP] ||
+		     !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
+		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;
+		last_ip = first_ip | ~ip_set_hostmask(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 = 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 %u\n", hosts, elements);
+
+	map = kzalloc(sizeof(*map), GFP_KERNEL);
+	if (!map)
+		return -ENOMEM;
+
+	if (tb[IPSET_ATTR_TIMEOUT]) {
+		map->memsize = elements * sizeof(unsigned long);
+
+		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->variant = &bitmap_tip;
+
+		bitmap_ip_gc_init(set);
+	} else {
+		map->memsize = bitmap_bytes(0, elements - 1);
+
+		if (!init_map_ip(set, map, first_ip, last_ip,
+				 elements, hosts, netmask)) {
+			kfree(map);
+			return -ENOMEM;
+		}
+
+		set->variant = &bitmap_ip;
+	}
+	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		= AF_INET,
+	.revision	= 0,
+	.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 },
+	},
+	.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 },
+	},
+	.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);

net/netfilter/ipset/ip_set_bitmap_ipmac.c

···
+/* Copyright (C) 2000-2002 Joakim Axelsson <[e-mail]>
+ *                         Patrick Schaaf <[e-mail]>
+ *			   Martin Josefsson <[e-mail]>
+ * Copyright (C) 2003-2011 Jozsef Kadlecsik <[e-mail]>
+ *
+ * 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,mac type */
+
+#include <linux/module.h>
+#include <linux/ip.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/errno.h>
+#include <linux/if_ether.h>
+#include <linux/netlink.h>
+#include <linux/jiffies.h>
+#include <linux/timer.h>
+#include <net/netlink.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_bitmap.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jozsef Kadlecsik <[e-mail]>");
+MODULE_DESCRIPTION("bitmap:ip,mac type of IP sets");
+MODULE_ALIAS("ip_set_bitmap:ip,mac");
+
+enum {
+	MAC_EMPTY,		/* element is not set */
+	MAC_FILLED,		/* element is set with MAC */
+	MAC_UNSET,		/* element is set, without MAC */
+};
+
+/* Type structure */
+struct bitmap_ipmac {
+	void *members;		/* the set members */
+	u32 first_ip;		/* host byte order, included in range */
+	u32 last_ip;		/* host byte order, included in range */
+	u32 timeout;		/* timeout value */
+	struct timer_list gc;	/* garbage collector */
+	size_t dsize;		/* size of element */
+};
+
+/* ADT structure for generic function args */
+struct ipmac {
+	u32 id;			/* id in array */
+	unsigned char *ether;	/* ethernet address */
+};
+
+/* Member element without and with timeout */
+
+struct ipmac_elem {
+	unsigned char ether[ETH_ALEN];
+	unsigned char match;
+} __attribute__ ((aligned));
+
+struct ipmac_telem {
+	unsigned char ether[ETH_ALEN];
+	unsigned char match;
+	unsigned long timeout;
+} __attribute__ ((aligned));
+
+static inline void *
+bitmap_ipmac_elem(const struct bitmap_ipmac *map, u32 id)
+{
+	return (void *)((char *)map->members + id * map->dsize);
+}
+
+static inline bool
+bitmap_timeout(const struct bitmap_ipmac *map, u32 id)
+{
+	const struct ipmac_telem *elem = bitmap_ipmac_elem(map, id);
+
+	return ip_set_timeout_test(elem->timeout);
+}
+
+static inline bool
+bitmap_expired(const struct bitmap_ipmac *map, u32 id)
+{
+	const struct ipmac_telem *elem = bitmap_ipmac_elem(map, id);
+
+	return ip_set_timeout_expired(elem->timeout);
+}
+
+static inline int
+bitmap_ipmac_exist(const struct ipmac_telem *elem)
+{
+	return elem->match == MAC_UNSET ||
+	       (elem->match == MAC_FILLED &&
+		!ip_set_timeout_expired(elem->timeout));
+}
+
+/* Base variant */
+
+static int
+bitmap_ipmac_test(struct ip_set *set, void *value, u32 timeout)
+{
+	const struct bitmap_ipmac *map = set->data;
+	const struct ipmac *data = value;
+	const struct ipmac_elem *elem = bitmap_ipmac_elem(map, data->id);
+
+	switch (elem->match) {
+	case MAC_UNSET:
+		/* Trigger kernel to fill out the ethernet address */
+		return -EAGAIN;
+	case MAC_FILLED:
+		return data->ether == NULL ||
+		       compare_ether_addr(data->ether, elem->ether) == 0;
+	}
+	return 0;
+}
+
+static int
+bitmap_ipmac_add(struct ip_set *set, void *value, u32 timeout)
+{
+	struct bitmap_ipmac *map = set->data;
+	const struct ipmac *data = value;
+	struct ipmac_elem *elem = bitmap_ipmac_elem(map, data->id);
+
+	switch (elem->match) {
+	case MAC_UNSET:
+		if (!data->ether)
+			/* Already added without ethernet address */
+			return -IPSET_ERR_EXIST;
+		/* Fill the MAC address */
+		memcpy(elem->ether, data->ether, ETH_ALEN);
+		elem->match = MAC_FILLED;
+		break;
+	case MAC_FILLED:
+		return -IPSET_ERR_EXIST;
+	case MAC_EMPTY:
+		if (data->ether) {
+			memcpy(elem->ether, data->ether, ETH_ALEN);
+			elem->match = MAC_FILLED;
+		} else
+			elem->match = MAC_UNSET;
+	}
+
+	return 0;
+}
+
+static int
+bitmap_ipmac_del(struct ip_set *set, void *value, u32 timeout)
+{
+	struct bitmap_ipmac *map = set->data;
+	const struct ipmac *data = value;
+	struct ipmac_elem *elem = bitmap_ipmac_elem(map, data->id);
+
+	if (elem->match == MAC_EMPTY)
+		return -IPSET_ERR_EXIST;
+
+	elem->match = MAC_EMPTY;
+
+	return 0;
+}
+
+static int
+bitmap_ipmac_list(const struct ip_set *set,
+		  struct sk_buff *skb, struct netlink_callback *cb)
+{
+	const struct bitmap_ipmac *map = set->data;
+	const struct ipmac_elem *elem;
+	struct nlattr *atd, *nested;
+	u32 id, first = cb->args[2];
+	u32 last = map->last_ip - map->first_ip;
+
+	atd = ipset_nest_start(skb, IPSET_ATTR_ADT);
+	if (!atd)
+		return -EMSGSIZE;
+	for (; cb->args[2] <= last; cb->args[2]++) {
+		id = cb->args[2];
+		elem = bitmap_ipmac_elem(map, id);
+		if (elem->match == MAC_EMPTY)
+			continue;
+		nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
+		if (!nested) {
+			if (id == first) {
+				nla_nest_cancel(skb, atd);
+				return -EMSGSIZE;
+			} else
+				goto nla_put_failure;
+		}
+		NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP,
+				htonl(map->first_ip + id));
+		if (elem->match == MAC_FILLED)
+			NLA_PUT(skb, IPSET_ATTR_ETHER, ETH_ALEN,
+				elem->ether);
+		ipset_nest_end(skb, nested);
+	}
+	ipset_nest_end(skb, atd);
+	/* Set listing finished */
+	cb->args[2] = 0;
+
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(skb, nested);
+	ipset_nest_end(skb, atd);
+	if (unlikely(id == first)) {
+		cb->args[2] = 0;
+		return -EMSGSIZE;
+	}
+	return 0;
+}
+
+/* Timeout variant */
+
+static int
+bitmap_ipmac_ttest(struct ip_set *set, void *value, u32 timeout)
+{
+	const struct bitmap_ipmac *map = set->data;
+	const struct ipmac *data = value;
+	const struct ipmac_elem *elem = bitmap_ipmac_elem(map, data->id);
+
+	switch (elem->match) {
+	case MAC_UNSET:
+		/* Trigger kernel to fill out the ethernet address */
+		return -EAGAIN;
+	case MAC_FILLED:
+		return (data->ether == NULL ||
+			compare_ether_addr(data->ether, elem->ether) == 0) &&
+		       !bitmap_expired(map, data->id);
+	}
+	return 0;
+}
+
+static int
+bitmap_ipmac_tadd(struct ip_set *set, void *value, u32 timeout)
+{
+	struct bitmap_ipmac *map = set->data;
+	const struct ipmac *data = value;
+	struct ipmac_telem *elem = bitmap_ipmac_elem(map, data->id);
+
+	switch (elem->match) {
+	case MAC_UNSET:
+		if (!data->ether)
+			/* Already added without ethernet address */
+			return -IPSET_ERR_EXIST;
+		/* Fill the MAC address and activate the timer */
+		memcpy(elem->ether, data->ether, ETH_ALEN);
+		elem->match = MAC_FILLED;
+		if (timeout == map->timeout)
+			/* Timeout was not specified, get stored one */
+			timeout = elem->timeout;
+		elem->timeout = ip_set_timeout_set(timeout);
+		break;
+	case MAC_FILLED:
+		if (!bitmap_expired(map, data->id))
+			return -IPSET_ERR_EXIST;
+		/* Fall through */
+	case MAC_EMPTY:
+		if (data->ether) {
+			memcpy(elem->ether, data->ether, ETH_ALEN);
+			elem->match = MAC_FILLED;
+		} else
+			elem->match = MAC_UNSET;
+		/* If MAC is unset yet, we store plain timeout value
+		 * because the timer is not activated yet
+		 * and we can reuse it later when MAC is filled out,
+		 * possibly by the kernel */
+		elem->timeout = data->ether ? ip_set_timeout_set(timeout)
+					    : timeout;
+		break;
+	}
+
+	return 0;
+}
+
+static int
+bitmap_ipmac_tdel(struct ip_set *set, void *value, u32 timeout)
+{
+	struct bitmap_ipmac *map = set->data;
+	const struct ipmac *data = value;
+	struct ipmac_telem *elem = bitmap_ipmac_elem(map, data->id);
+
+	if (elem->match == MAC_EMPTY || bitmap_expired(map, data->id))
+		return -IPSET_ERR_EXIST;
+
+	elem->match = MAC_EMPTY;
+
+	return 0;
+}
+
+static int
+bitmap_ipmac_tlist(const struct ip_set *set,
+		   struct sk_buff *skb, struct netlink_callback *cb)
+{
+	const struct bitmap_ipmac *map = set->data;
+	const struct ipmac_telem *elem;
+	struct nlattr *atd, *nested;
+	u32 id, first = cb->args[2];
+	u32 timeout, last = map->last_ip - map->first_ip;
+
+	atd = ipset_nest_start(skb, IPSET_ATTR_ADT);
+	if (!atd)
+		return -EMSGSIZE;
+	for (; cb->args[2] <= last; cb->args[2]++) {
+		id = cb->args[2];
+		elem = bitmap_ipmac_elem(map, id);
+		if (!bitmap_ipmac_exist(elem))
+			continue;
+		nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
+		if (!nested) {
+			if (id == first) {
+				nla_nest_cancel(skb, atd);
+				return -EMSGSIZE;
+			} else
+				goto nla_put_failure;
+		}
+		NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP,
+				htonl(map->first_ip + id));
+		if (elem->match == MAC_FILLED)
+			NLA_PUT(skb, IPSET_ATTR_ETHER, ETH_ALEN,
+				elem->ether);
+		timeout = elem->match == MAC_UNSET ? elem->timeout
+				: ip_set_timeout_get(elem->timeout);
+		NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT, htonl(timeout));
+		ipset_nest_end(skb, nested);
+	}
+	ipset_nest_end(skb, atd);
+	/* Set listing finished */
+	cb->args[2] = 0;
+
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(skb, nested);
+	ipset_nest_end(skb, atd);
+	return -EMSGSIZE;
+}
+
+static int
+bitmap_ipmac_kadt(struct ip_set *set, const struct sk_buff *skb,
+		  enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
+{
+	struct bitmap_ipmac *map = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	struct ipmac data;
+
+	data.id = ntohl(ip4addr(skb, flags & IPSET_DIM_ONE_SRC));
+	if (data.id < map->first_ip || data.id > map->last_ip)
+		return -IPSET_ERR_BITMAP_RANGE;
+
+	/* Backward compatibility: we don't check the second flag */
+	if (skb_mac_header(skb) < skb->head ||
+	    (skb_mac_header(skb) + ETH_HLEN) > skb->data)
+		return -EINVAL;
+
+	data.id -= map->first_ip;
+	data.ether = eth_hdr(skb)->h_source;
+
+	return adtfn(set, &data, map->timeout);
+}
+
+static int
+bitmap_ipmac_uadt(struct ip_set *set, struct nlattr *tb[],
+		  enum ipset_adt adt, u32 *lineno, u32 flags)
+{
+	const struct bitmap_ipmac *map = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	struct ipmac data;
+	u32 timeout = map->timeout;
+	int ret = 0;
+
+	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], &data.id);
+	if (ret)
+		return ret;
+
+	if (data.id < map->first_ip || data.id > map->last_ip)
+		return -IPSET_ERR_BITMAP_RANGE;
+
+	if (tb[IPSET_ATTR_ETHER])
+		data.ether = nla_data(tb[IPSET_ATTR_ETHER]);
+	else
+		data.ether = NULL;
+
+	if (tb[IPSET_ATTR_TIMEOUT]) {
+		if (!with_timeout(map->timeout))
+			return -IPSET_ERR_TIMEOUT;
+		timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
+	}
+
+	data.id -= map->first_ip;
+
+	ret = adtfn(set, &data, timeout);
+
+	return ip_set_eexist(ret, flags) ? 0 : ret;
+}
+
+static void
+bitmap_ipmac_destroy(struct ip_set *set)
+{
+	struct bitmap_ipmac *map = set->data;
+
+	if (with_timeout(map->timeout))
+		del_timer_sync(&map->gc);
+
+	ip_set_free(map->members);
+	kfree(map);
+
+	set->data = NULL;
+}
+
+static void
+bitmap_ipmac_flush(struct ip_set *set)
+{
+	struct bitmap_ipmac *map = set->data;
+
+	memset(map->members, 0,
+	       (map->last_ip - map->first_ip + 1) * map->dsize);
+}
+
+static int
+bitmap_ipmac_head(struct ip_set *set, struct sk_buff *skb)
+{
+	const struct bitmap_ipmac *map = set->data;
+	struct nlattr *nested;
+
+	nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
+	if (!nested)
+		goto nla_put_failure;
+	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, htonl(map->first_ip));
+	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP_TO, htonl(map->last_ip));
+	NLA_PUT_NET32(skb, IPSET_ATTR_REFERENCES,
+		      htonl(atomic_read(&set->ref) - 1));
+	NLA_PUT_NET32(skb, IPSET_ATTR_MEMSIZE,
+		      htonl(sizeof(*map)
+			    + (map->last_ip - map->first_ip + 1) * map->dsize));
+	if (with_timeout(map->timeout))
+		NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT, htonl(map->timeout));
+	ipset_nest_end(skb, nested);
+
+	return 0;
+nla_put_failure:
+	return -EMSGSIZE;
+}
+
+static bool
+bitmap_ipmac_same_set(const struct ip_set *a, const struct ip_set *b)
+{
+	const struct bitmap_ipmac *x = a->data;
+	const struct bitmap_ipmac *y = b->data;
+
+	return x->first_ip == y->first_ip &&
+	       x->last_ip == y->last_ip &&
+	       x->timeout == y->timeout;
+}
+
+static const struct ip_set_type_variant bitmap_ipmac = {
+	.kadt	= bitmap_ipmac_kadt,
+	.uadt	= bitmap_ipmac_uadt,
+	.adt	= {
+		[IPSET_ADD] = bitmap_ipmac_add,
+		[IPSET_DEL] = bitmap_ipmac_del,
+		[IPSET_TEST] = bitmap_ipmac_test,
+	},
+	.destroy = bitmap_ipmac_destroy,
+	.flush	= bitmap_ipmac_flush,
+	.head	= bitmap_ipmac_head,
+	.list	= bitmap_ipmac_list,
+	.same_set = bitmap_ipmac_same_set,
+};
+
+static const struct ip_set_type_variant bitmap_tipmac = {
+	.kadt	= bitmap_ipmac_kadt,
+	.uadt	= bitmap_ipmac_uadt,
+	.adt	= {
+		[IPSET_ADD] = bitmap_ipmac_tadd,
+		[IPSET_DEL] = bitmap_ipmac_tdel,
+		[IPSET_TEST] = bitmap_ipmac_ttest,
+	},
+	.destroy = bitmap_ipmac_destroy,
+	.flush	= bitmap_ipmac_flush,
+	.head	= bitmap_ipmac_head,
+	.list	= bitmap_ipmac_tlist,
+	.same_set = bitmap_ipmac_same_set,
+};
+
+static void
+bitmap_ipmac_gc(unsigned long ul_set)
+{
+	struct ip_set *set = (struct ip_set *) ul_set;
+	struct bitmap_ipmac *map = set->data;
+	struct ipmac_telem *elem;
+	u32 id, last = map->last_ip - map->first_ip;
+
+	/* We run parallel with other readers (test element)
+	 * but adding/deleting new entries is locked out */
+	read_lock_bh(&set->lock);
+	for (id = 0; id <= last; id++) {
+		elem = bitmap_ipmac_elem(map, id);
+		if (elem->match == MAC_FILLED &&
+		    ip_set_timeout_expired(elem->timeout))
+			elem->match = MAC_EMPTY;
+	}
+	read_unlock_bh(&set->lock);
+
+	map->gc.expires = jiffies + IPSET_GC_PERIOD(map->timeout) * HZ;
+	add_timer(&map->gc);
+}
+
+static void
+bitmap_ipmac_gc_init(struct ip_set *set)
+{
+	struct bitmap_ipmac *map = set->data;
+
+	init_timer(&map->gc);
+	map->gc.data = (unsigned long) set;
+	map->gc.function = bitmap_ipmac_gc;
+	map->gc.expires = jiffies + IPSET_GC_PERIOD(map->timeout) * HZ;
+	add_timer(&map->gc);
+}
+
+/* Create bitmap:ip,mac type of sets */
+
+static bool
+init_map_ipmac(struct ip_set *set, struct bitmap_ipmac *map,
+	       u32 first_ip, u32 last_ip)
+{
+	map->members = ip_set_alloc((last_ip - first_ip + 1) * map->dsize);
+	if (!map->members)
+		return false;
+	map->first_ip = first_ip;
+	map->last_ip = last_ip;
+	map->timeout = IPSET_NO_TIMEOUT;
+
+	set->data = map;
+	set->family = AF_INET;
+
+	return true;
+}
+
+static int
+bitmap_ipmac_create(struct ip_set *set, struct nlattr *tb[],
+		    u32 flags)
+{
+	u32 first_ip, last_ip, elements;
+	struct bitmap_ipmac *map;
+	int ret;
+
+	if (unlikely(!tb[IPSET_ATTR_IP] ||
+		     !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
+		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;
+		last_ip = first_ip | ~ip_set_hostmask(cidr);
+	} else
+		return -IPSET_ERR_PROTOCOL;
+
+	elements = last_ip - first_ip + 1;
+
+	if (elements > IPSET_BITMAP_MAX_RANGE + 1)
+		return -IPSET_ERR_BITMAP_RANGE_SIZE;
+
+	map = kzalloc(sizeof(*map), GFP_KERNEL);
+	if (!map)
+		return -ENOMEM;
+
+	if (tb[IPSET_ATTR_TIMEOUT]) {
+		map->dsize = sizeof(struct ipmac_telem);
+
+		if (!init_map_ipmac(set, map, first_ip, last_ip)) {
+			kfree(map);
+			return -ENOMEM;
+		}
+
+		map->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
+
+		set->variant = &bitmap_tipmac;
+
+		bitmap_ipmac_gc_init(set);
+	} else {
+		map->dsize = sizeof(struct ipmac_elem);
+
+		if (!init_map_ipmac(set, map, first_ip, last_ip)) {
+			kfree(map);
+			return -ENOMEM;
+		}
+		set->variant = &bitmap_ipmac;
+
+	}
+	return 0;
+}
+
+static struct ip_set_type bitmap_ipmac_type = {
+	.name		= "bitmap:ip,mac",
+	.protocol	= IPSET_PROTOCOL,
+	.features	= IPSET_TYPE_IP | IPSET_TYPE_MAC,
+	.dimension	= IPSET_DIM_TWO,
+	.family		= AF_INET,
+	.revision	= 0,
+	.create		= bitmap_ipmac_create,
+	.create_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 },
+	},
+	.adt_policy	= {
+		[IPSET_ATTR_IP]		= { .type = NLA_NESTED },
+		[IPSET_ATTR_ETHER]	= { .type = NLA_BINARY, .len  = ETH_ALEN },
+		[IPSET_ATTR_TIMEOUT]	= { .type = NLA_U32 },
+		[IPSET_ATTR_LINENO]	= { .type = NLA_U32 },
+	},
+	.me		= THIS_MODULE,
+};
+
+static int __init
+bitmap_ipmac_init(void)
+{
+	return ip_set_type_register(&bitmap_ipmac_type);
+}
+
+static void __exit
+bitmap_ipmac_fini(void)
+{
+	ip_set_type_unregister(&bitmap_ipmac_type);
+}
+
+module_init(bitmap_ipmac_init);
+module_exit(bitmap_ipmac_fini);

net/netfilter/ipset/ip_set_bitmap_port.c

···
+/* Copyright (C) 2003-2011 Jozsef Kadlecsik <[e-mail]>
+ *
+ * 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:port type */
+
+#include <linux/module.h>
+#include <linux/ip.h>
+#include <linux/skbuff.h>
+#include <linux/errno.h>
+#include <linux/netlink.h>
+#include <linux/jiffies.h>
+#include <linux/timer.h>
+#include <net/netlink.h>
+
+#include <linux/netfilter/ipset/ip_set.h>
+#include <linux/netfilter/ipset/ip_set_bitmap.h>
+#include <linux/netfilter/ipset/ip_set_getport.h>
+#define IP_SET_BITMAP_TIMEOUT
+#include <linux/netfilter/ipset/ip_set_timeout.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jozsef Kadlecsik <[e-mail]>");
+MODULE_DESCRIPTION("bitmap:port type of IP sets");
+MODULE_ALIAS("ip_set_bitmap:port");
+
+/* Type structure */
+struct bitmap_port {
+	void *members;		/* the set members */
+	u16 first_port;		/* host byte order, included in range */
+	u16 last_port;		/* host byte order, included in range */
+	size_t memsize;		/* members size */
+	u32 timeout;		/* timeout parameter */
+	struct timer_list gc;	/* garbage collection */
+};
+
+/* Base variant */
+
+static int
+bitmap_port_test(struct ip_set *set, void *value, u32 timeout)
+{
+	const struct bitmap_port *map = set->data;
+	u16 id = *(u16 *)value;
+
+	return !!test_bit(id, map->members);
+}
+
+static int
+bitmap_port_add(struct ip_set *set, void *value, u32 timeout)
+{
+	struct bitmap_port *map = set->data;
+	u16 id = *(u16 *)value;
+
+	if (test_and_set_bit(id, map->members))
+		return -IPSET_ERR_EXIST;
+
+	return 0;
+}
+
+static int
+bitmap_port_del(struct ip_set *set, void *value, u32 timeout)
+{
+	struct bitmap_port *map = set->data;
+	u16 id = *(u16 *)value;
+
+	if (!test_and_clear_bit(id, map->members))
+		return -IPSET_ERR_EXIST;
+
+	return 0;
+}
+
+static int
+bitmap_port_list(const struct ip_set *set,
+		 struct sk_buff *skb, struct netlink_callback *cb)
+{
+	const struct bitmap_port *map = set->data;
+	struct nlattr *atd, *nested;
+	u16 id, first = cb->args[2];
+	u16 last = map->last_port - map->first_port;
+
+	atd = ipset_nest_start(skb, IPSET_ATTR_ADT);
+	if (!atd)
+		return -EMSGSIZE;
+	for (; cb->args[2] <= last; cb->args[2]++) {
+		id = cb->args[2];
+		if (!test_bit(id, map->members))
+			continue;
+		nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
+		if (!nested) {
+			if (id == first) {
+				nla_nest_cancel(skb, atd);
+				return -EMSGSIZE;
+			} else
+				goto nla_put_failure;
+		}
+		NLA_PUT_NET16(skb, IPSET_ATTR_PORT,
+			      htons(map->first_port + id));
+		ipset_nest_end(skb, nested);
+	}
+	ipset_nest_end(skb, atd);
+	/* Set listing finished */
+	cb->args[2] = 0;
+
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(skb, nested);
+	ipset_nest_end(skb, atd);
+	if (unlikely(id == first)) {
+		cb->args[2] = 0;
+		return -EMSGSIZE;
+	}
+	return 0;
+}
+
+/* Timeout variant */
+
+static int
+bitmap_port_ttest(struct ip_set *set, void *value, u32 timeout)
+{
+	const struct bitmap_port *map = set->data;
+	const unsigned long *members = map->members;
+	u16 id = *(u16 *)value;
+
+	return ip_set_timeout_test(members[id]);
+}
+
+static int
+bitmap_port_tadd(struct ip_set *set, void *value, u32 timeout)
+{
+	struct bitmap_port *map = set->data;
+	unsigned long *members = map->members;
+	u16 id = *(u16 *)value;
+
+	if (ip_set_timeout_test(members[id]))
+		return -IPSET_ERR_EXIST;
+
+	members[id] = ip_set_timeout_set(timeout);
+
+	return 0;
+}
+
+static int
+bitmap_port_tdel(struct ip_set *set, void *value, u32 timeout)
+{
+	struct bitmap_port *map = set->data;
+	unsigned long *members = map->members;
+	u16 id = *(u16 *)value;
+	int ret = -IPSET_ERR_EXIST;
+
+	if (ip_set_timeout_test(members[id]))
+		ret = 0;
+
+	members[id] = IPSET_ELEM_UNSET;
+	return ret;
+}
+
+static int
+bitmap_port_tlist(const struct ip_set *set,
+		  struct sk_buff *skb, struct netlink_callback *cb)
+{
+	const struct bitmap_port *map = set->data;
+	struct nlattr *adt, *nested;
+	u16 id, first = cb->args[2];
+	u16 last = map->last_port - map->first_port;
+	const unsigned long *members = map->members;
+
+	adt = ipset_nest_start(skb, IPSET_ATTR_ADT);
+	if (!adt)
+		return -EMSGSIZE;
+	for (; cb->args[2] <= last; cb->args[2]++) {
+		id = cb->args[2];
+		if (!ip_set_timeout_test(members[id]))
+			continue;
+		nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
+		if (!nested) {
+			if (id == first) {
+				nla_nest_cancel(skb, adt);
+				return -EMSGSIZE;
+			} else
+				goto nla_put_failure;
+		}
+		NLA_PUT_NET16(skb, IPSET_ATTR_PORT,
+			      htons(map->first_port + id));
+		NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
+			      htonl(ip_set_timeout_get(members[id])));
+		ipset_nest_end(skb, nested);
+	}
+	ipset_nest_end(skb, adt);
+
+	/* Set listing finished */
+	cb->args[2] = 0;
+
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(skb, nested);
+	ipset_nest_end(skb, adt);
+	if (unlikely(id == first)) {
+		cb->args[2] = 0;
+		return -EMSGSIZE;
+	}
+	return 0;
+}
+
+static int
+bitmap_port_kadt(struct ip_set *set, const struct sk_buff *skb,
+		 enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
+{
+	struct bitmap_port *map = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	__be16 __port;
+	u16 port = 0;
+
+	if (!ip_set_get_ip_port(skb, pf, flags & IPSET_DIM_ONE_SRC, &__port))
+		return -EINVAL;
+
+	port = ntohs(__port);
+
+	if (port < map->first_port || port > map->last_port)
+		return -IPSET_ERR_BITMAP_RANGE;
+
+	port -= map->first_port;
+
+	return adtfn(set, &port, map->timeout);
+}
+
+static int
+bitmap_port_uadt(struct ip_set *set, struct nlattr *tb[],
+		 enum ipset_adt adt, u32 *lineno, u32 flags)
+{
+	struct bitmap_port *map = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	u32 timeout = map->timeout;
+	u32 port;	/* wraparound */
+	u16 id, port_to;
+	int ret = 0;
+
+	if (unlikely(!ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
+		     !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
+		     !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]);
+
+	port = ip_set_get_h16(tb[IPSET_ATTR_PORT]);
+	if (port < map->first_port || port > map->last_port)
+		return -IPSET_ERR_BITMAP_RANGE;
+
+	if (tb[IPSET_ATTR_TIMEOUT]) {
+		if (!with_timeout(map->timeout))
+			return -IPSET_ERR_TIMEOUT;
+		timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
+	}
+
+	if (adt == IPSET_TEST) {
+		id = port - map->first_port;
+		return adtfn(set, &id, timeout);
+	}
+
+	if (tb[IPSET_ATTR_PORT_TO]) {
+		port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
+		if (port > port_to) {
+			swap(port, port_to);
+			if (port < map->first_port)
+				return -IPSET_ERR_BITMAP_RANGE;
+		}
+	} else
+		port_to = port;
+
+	if (port_to > map->last_port)
+		return -IPSET_ERR_BITMAP_RANGE;
+
+	for (; port <= port_to; port++) {
+		id = port - map->first_port;
+		ret = adtfn(set, &id, timeout);
+
+		if (ret && !ip_set_eexist(ret, flags))
+			return ret;
+		else
+			ret = 0;
+	}
+	return ret;
+}
+
+static void
+bitmap_port_destroy(struct ip_set *set)
+{
+	struct bitmap_port *map = set->data;
+
+	if (with_timeout(map->timeout))
+		del_timer_sync(&map->gc);
+
+	ip_set_free(map->members);
+	kfree(map);
+
+	set->data = NULL;
+}
+
+static void
+bitmap_port_flush(struct ip_set *set)
+{
+	struct bitmap_port *map = set->data;
+
+	memset(map->members, 0, map->memsize);
+}
+
+static int
+bitmap_port_head(struct ip_set *set, struct sk_buff *skb)
+{
+	const struct bitmap_port *map = set->data;
+	struct nlattr *nested;
+
+	nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
+	if (!nested)
+		goto nla_put_failure;
+	NLA_PUT_NET16(skb, IPSET_ATTR_PORT, htons(map->first_port));
+	NLA_PUT_NET16(skb, IPSET_ATTR_PORT_TO, htons(map->last_port));
+	NLA_PUT_NET32(skb, IPSET_ATTR_REFERENCES,
+		      htonl(atomic_read(&set->ref) - 1));
+	NLA_PUT_NET32(skb, IPSET_ATTR_MEMSIZE,
+		      htonl(sizeof(*map) + map->memsize));
+	if (with_timeout(map->timeout))
+		NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT, htonl(map->timeout));
+	ipset_nest_end(skb, nested);
+
+	return 0;
+nla_put_failure:
+	return -EMSGSIZE;
+}
+
+static bool
+bitmap_port_same_set(const struct ip_set *a, const struct ip_set *b)
+{
+	const struct bitmap_port *x = a->data;
+	const struct bitmap_port *y = b->data;
+
+	return x->first_port == y->first_port &&
+	       x->last_port == y->last_port &&
+	       x->timeout == y->timeout;
+}
+
+static const struct ip_set_type_variant bitmap_port = {
+	.kadt	= bitmap_port_kadt,
+	.uadt	= bitmap_port_uadt,
+	.adt	= {
+		[IPSET_ADD] = bitmap_port_add,
+		[IPSET_DEL] = bitmap_port_del,
+		[IPSET_TEST] = bitmap_port_test,
+	},
+	.destroy = bitmap_port_destroy,
+	.flush	= bitmap_port_flush,
+	.head	= bitmap_port_head,
+	.list	= bitmap_port_list,
+	.same_set = bitmap_port_same_set,
+};
+
+static const struct ip_set_type_variant bitmap_tport = {
+	.kadt	= bitmap_port_kadt,
+	.uadt	= bitmap_port_uadt,
+	.adt	= {
+		[IPSET_ADD] = bitmap_port_tadd,
+		[IPSET_DEL] = bitmap_port_tdel,
+		[IPSET_TEST] = bitmap_port_ttest,
+	},
+	.destroy = bitmap_port_destroy,
+	.flush	= bitmap_port_flush,
+	.head	= bitmap_port_head,
+	.list	= bitmap_port_tlist,
+	.same_set = bitmap_port_same_set,
+};
+
+static void
+bitmap_port_gc(unsigned long ul_set)
+{
+	struct ip_set *set = (struct ip_set *) ul_set;
+	struct bitmap_port *map = set->data;
+	unsigned long *table = map->members;
+	u32 id;	/* wraparound */
+	u16 last = map->last_port - map->first_port;
+
+	/* We run parallel with other readers (test element)
+	 * but adding/deleting new entries is locked out */
+	read_lock_bh(&set->lock);
+	for (id = 0; id <= last; id++)
+		if (ip_set_timeout_expired(table[id]))
+			table[id] = IPSET_ELEM_UNSET;
+	read_unlock_bh(&set->lock);
+
+	map->gc.expires = jiffies + IPSET_GC_PERIOD(map->timeout) * HZ;
+	add_timer(&map->gc);
+}
+
+static void
+bitmap_port_gc_init(struct ip_set *set)
+{
+	struct bitmap_port *map = set->data;
+
+	init_timer(&map->gc);
+	map->gc.data = (unsigned long) set;
+	map->gc.function = bitmap_port_gc;
+	map->gc.expires = jiffies + IPSET_GC_PERIOD(map->timeout) * HZ;
+	add_timer(&map->gc);
+}
+
+/* Create bitmap:ip type of sets */
+
+static bool
+init_map_port(struct ip_set *set, struct bitmap_port *map,
+	      u16 first_port, u16 last_port)
+{
+	map->members = ip_set_alloc(map->memsize);
+	if (!map->members)
+		return false;
+	map->first_port = first_port;
+	map->last_port = last_port;
+	map->timeout = IPSET_NO_TIMEOUT;
+
+	set->data = map;
+	set->family = AF_UNSPEC;
+
+	return true;
+}
+
+static int
+bitmap_port_create(struct ip_set *set, struct nlattr *tb[],
+		 u32 flags)
+{
+	struct bitmap_port *map;
+	u16 first_port, last_port;
+
+	if (unlikely(!ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
+		     !ip_set_attr_netorder(tb, IPSET_ATTR_PORT_TO) ||
+		     !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
+		return -IPSET_ERR_PROTOCOL;
+
+	first_port = ip_set_get_h16(tb[IPSET_ATTR_PORT]);
+	last_port = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
+	if (first_port > last_port) {
+		u16 tmp = first_port;
+
+		first_port = last_port;
+		last_port = tmp;
+	}
+
+	map = kzalloc(sizeof(*map), GFP_KERNEL);
+	if (!map)
+		return -ENOMEM;
+
+	if (tb[IPSET_ATTR_TIMEOUT]) {
+		map->memsize = (last_port - first_port + 1)
+			       * sizeof(unsigned long);
+
+		if (!init_map_port(set, map, first_port, last_port)) {
+			kfree(map);
+			return -ENOMEM;
+		}
+
+		map->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
+		set->variant = &bitmap_tport;
+
+		bitmap_port_gc_init(set);
+	} else {
+		map->memsize = bitmap_bytes(0, last_port - first_port);
+		pr_debug("memsize: %zu\n", map->memsize);
+		if (!init_map_port(set, map, first_port, last_port)) {
+			kfree(map);
+			return -ENOMEM;
+		}
+
+		set->variant = &bitmap_port;
+	}
+	return 0;
+}
+
+static struct ip_set_type bitmap_port_type = {
+	.name		= "bitmap:port",
+	.protocol	= IPSET_PROTOCOL,
+	.features	= IPSET_TYPE_PORT,
+	.dimension	= IPSET_DIM_ONE,
+	.family		= AF_UNSPEC,
+	.revision	= 0,
+	.create		= bitmap_port_create,
+	.create_policy	= {
+		[IPSET_ATTR_PORT]	= { .type = NLA_U16 },
+		[IPSET_ATTR_PORT_TO]	= { .type = NLA_U16 },
+		[IPSET_ATTR_TIMEOUT]	= { .type = NLA_U32 },
+	},
+	.adt_policy	= {
+		[IPSET_ATTR_PORT]	= { .type = NLA_U16 },
+		[IPSET_ATTR_PORT_TO]	= { .type = NLA_U16 },
+		[IPSET_ATTR_TIMEOUT]	= { .type = NLA_U32 },
+		[IPSET_ATTR_LINENO]	= { .type = NLA_U32 },
+	},
+	.me		= THIS_MODULE,
+};
+
+static int __init
+bitmap_port_init(void)
+{
+	return ip_set_type_register(&bitmap_port_type);
+}
+
+static void __exit
+bitmap_port_fini(void)
+{
+	ip_set_type_unregister(&bitmap_port_type);
+}
+
+module_init(bitmap_port_init);
+module_exit(bitmap_port_fini);

net/netfilter/ipset/ip_set_core.c

···
+/* Copyright (C) 2000-2002 Joakim Axelsson <[e-mail]>
+ *                         Patrick Schaaf <[e-mail]>
+ * Copyright (C) 2003-2011 Jozsef Kadlecsik <[e-mail]>
+ *
+ * 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 for IP set management */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/ip.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/netlink.h>
+#include <linux/rculist.h>
+#include <linux/version.h>
+#include <net/netlink.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter/nfnetlink.h>
+#include <linux/netfilter/ipset/ip_set.h>
+
+static LIST_HEAD(ip_set_type_list);		/* all registered set types */
+static DEFINE_MUTEX(ip_set_type_mutex);		/* protects ip_set_type_list */
+
+static struct ip_set **ip_set_list;		/* all individual sets */
+static ip_set_id_t ip_set_max = CONFIG_IP_SET_MAX; /* max number of sets */
+
+#define STREQ(a, b)	(strncmp(a, b, IPSET_MAXNAMELEN) == 0)
+
+static unsigned int max_sets;
+
+module_param(max_sets, int, 0600);
+MODULE_PARM_DESC(max_sets, "maximal number of sets");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jozsef Kadlecsik <[e-mail]>");
+MODULE_DESCRIPTION("core IP set support");
+MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_IPSET);
+
+/*
+ * The set types are implemented in modules and registered set types
+ * can be found in ip_set_type_list. Adding/deleting types is
+ * serialized by ip_set_type_mutex.
+ */
+
+static inline void
+ip_set_type_lock(void)
+{
+	mutex_lock(&ip_set_type_mutex);
+}
+
+static inline void
+ip_set_type_unlock(void)
+{
+	mutex_unlock(&ip_set_type_mutex);
+}
+
+/* Register and deregister settype */
+
+static struct ip_set_type *
+find_set_type(const char *name, u8 family, u8 revision)
+{
+	struct ip_set_type *type;
+
+	list_for_each_entry_rcu(type, &ip_set_type_list, list)
+		if (STREQ(type->name, name) &&
+		    (type->family == family || type->family == AF_UNSPEC) &&
+		    type->revision == revision)
+			return type;
+	return NULL;
+}
+
+/* Unlock, try to load a set type module and lock again */
+static int
+try_to_load_type(const char *name)
+{
+	nfnl_unlock();
+	pr_debug("try to load ip_set_%s\n", name);
+	if (request_module("ip_set_%s", name) < 0) {
+		pr_warning("Can't find ip_set type %s\n", name);
+		nfnl_lock();
+		return -IPSET_ERR_FIND_TYPE;
+	}
+	nfnl_lock();
+	return -EAGAIN;
+}
+
+/* Find a set type and reference it */
+static int
+find_set_type_get(const char *name, u8 family, u8 revision,
+		  struct ip_set_type **found)
+{
+	rcu_read_lock();
+	*found = find_set_type(name, family, revision);
+	if (*found) {
+		int err = !try_module_get((*found)->me);
+		rcu_read_unlock();
+		return err ? -EFAULT : 0;
+	}
+	rcu_read_unlock();
+
+	return try_to_load_type(name);
+}
+
+/* Find a given set type by name and family.
+ * If we succeeded, the supported minimal and maximum revisions are
+ * filled out.
+ */
+static int
+find_set_type_minmax(const char *name, u8 family, u8 *min, u8 *max)
+{
+	struct ip_set_type *type;
+	bool found = false;
+
+	*min = *max = 0;
+	rcu_read_lock();
+	list_for_each_entry_rcu(type, &ip_set_type_list, list)
+		if (STREQ(type->name, name) &&
+		    (type->family == family || type->family == AF_UNSPEC)) {
+			found = true;
+			if (type->revision < *min)
+				*min = type->revision;
+			else if (type->revision > *max)
+				*max = type->revision;
+		}
+	rcu_read_unlock();
+	if (found)
+		return 0;
+
+	return try_to_load_type(name);
+}
+
+#define family_name(f)	((f) == AF_INET ? "inet" : \
+			 (f) == AF_INET6 ? "inet6" : "any")
+
+/* Register a set type structure. The type is identified by
+ * the unique triple of name, family and revision.
+ */
+int
+ip_set_type_register(struct ip_set_type *type)
+{
+	int ret = 0;
+
+	if (type->protocol != IPSET_PROTOCOL) {
+		pr_warning("ip_set type %s, family %s, revision %u uses "
+			   "wrong protocol version %u (want %u)\n",
+			   type->name, family_name(type->family),
+			   type->revision, type->protocol, IPSET_PROTOCOL);
+		return -EINVAL;
+	}
+
+	ip_set_type_lock();
+	if (find_set_type(type->name, type->family, type->revision)) {
+		/* Duplicate! */
+		pr_warning("ip_set type %s, family %s, revision %u "
+			   "already registered!\n", type->name,
+			   family_name(type->family), type->revision);
+		ret = -EINVAL;
+		goto unlock;
+	}
+	list_add_rcu(&type->list, &ip_set_type_list);
+	pr_debug("type %s, family %s, revision %u registered.\n",
+		 type->name, family_name(type->family), type->revision);
+unlock:
+	ip_set_type_unlock();
+	return ret;
+}
+EXPORT_SYMBOL_GPL(ip_set_type_register);
+
+/* Unregister a set type. There's a small race with ip_set_create */
+void
+ip_set_type_unregister(struct ip_set_type *type)
+{
+	ip_set_type_lock();
+	if (!find_set_type(type->name, type->family, type->revision)) {
+		pr_warning("ip_set type %s, family %s, revision %u "
+			   "not registered\n", type->name,
+			   family_name(type->family), type->revision);
+		goto unlock;
+	}
+	list_del_rcu(&type->list);
+	pr_debug("type %s, family %s, revision %u unregistered.\n",
+		 type->name, family_name(type->family), type->revision);
+unlock:
+	ip_set_type_unlock();
+
+	synchronize_rcu();
+}
+EXPORT_SYMBOL_GPL(ip_set_type_unregister);
+
+/* Utility functions */
+void *
+ip_set_alloc(size_t size)
+{
+	void *members = NULL;
+
+	if (size < KMALLOC_MAX_SIZE)
+		members = kzalloc(size, GFP_KERNEL | __GFP_NOWARN);
+
+	if (members) {
+		pr_debug("%p: allocated with kmalloc\n", members);
+		return members;
+	}
+
+	members = vzalloc(size);
+	if (!members)
+		return NULL;
+	pr_debug("%p: allocated with vmalloc\n", members);
+
+	return members;
+}
+EXPORT_SYMBOL_GPL(ip_set_alloc);
+
+void
+ip_set_free(void *members)
+{
+	pr_debug("%p: free with %s\n", members,
+		 is_vmalloc_addr(members) ? "vfree" : "kfree");
+	if (is_vmalloc_addr(members))
+		vfree(members);
+	else
+		kfree(members);
+}
+EXPORT_SYMBOL_GPL(ip_set_free);
+
+static inline bool
+flag_nested(const struct nlattr *nla)
+{
+	return nla->nla_type & NLA_F_NESTED;
+}
+
+static const struct nla_policy ipaddr_policy[IPSET_ATTR_IPADDR_MAX + 1] = {
+	[IPSET_ATTR_IPADDR_IPV4]	= { .type = NLA_U32 },
+	[IPSET_ATTR_IPADDR_IPV6]	= { .type = NLA_BINARY,
+					    .len = sizeof(struct in6_addr) },
+};
+
+int
+ip_set_get_ipaddr4(struct nlattr *nla,  __be32 *ipaddr)
+{
+	struct nlattr *tb[IPSET_ATTR_IPADDR_MAX+1];
+
+	if (unlikely(!flag_nested(nla)))
+		return -IPSET_ERR_PROTOCOL;
+	if (nla_parse_nested(tb, IPSET_ATTR_IPADDR_MAX, nla, ipaddr_policy))
+		return -IPSET_ERR_PROTOCOL;
+	if (unlikely(!ip_set_attr_netorder(tb, IPSET_ATTR_IPADDR_IPV4)))
+		return -IPSET_ERR_PROTOCOL;
+
+	*ipaddr = nla_get_be32(tb[IPSET_ATTR_IPADDR_IPV4]);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ip_set_get_ipaddr4);
+
+int
+ip_set_get_ipaddr6(struct nlattr *nla, union nf_inet_addr *ipaddr)
+{
+	struct nlattr *tb[IPSET_ATTR_IPADDR_MAX+1];
+
+	if (unlikely(!flag_nested(nla)))
+		return -IPSET_ERR_PROTOCOL;
+
+	if (nla_parse_nested(tb, IPSET_ATTR_IPADDR_MAX, nla, ipaddr_policy))
+		return -IPSET_ERR_PROTOCOL;
+	if (unlikely(!ip_set_attr_netorder(tb, IPSET_ATTR_IPADDR_IPV6)))
+		return -IPSET_ERR_PROTOCOL;
+
+	memcpy(ipaddr, nla_data(tb[IPSET_ATTR_IPADDR_IPV6]),
+		sizeof(struct in6_addr));
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ip_set_get_ipaddr6);
+
+/*
+ * Creating/destroying/renaming/swapping affect the existence and
+ * the properties of a set. All of these can be executed from userspace
+ * only and serialized by the nfnl mutex indirectly from nfnetlink.
+ *
+ * Sets are identified by their index in ip_set_list and the index
+ * is used by the external references (set/SET netfilter modules).
+ *
+ * The set behind an index may change by swapping only, from userspace.
+ */
+
+static inline void
+__ip_set_get(ip_set_id_t index)
+{
+	atomic_inc(&ip_set_list[index]->ref);
+}
+
+static inline void
+__ip_set_put(ip_set_id_t index)
+{
+	atomic_dec(&ip_set_list[index]->ref);
+}
+
+/*
+ * Add, del and test set entries from kernel.
+ *
+ * The set behind the index must exist and must be referenced
+ * so it can't be destroyed (or changed) under our foot.
+ */
+
+int
+ip_set_test(ip_set_id_t index, const struct sk_buff *skb,
+	    u8 family, u8 dim, u8 flags)
+{
+	struct ip_set *set = ip_set_list[index];
+	int ret = 0;
+
+	BUG_ON(set == NULL || atomic_read(&set->ref) == 0);
+	pr_debug("set %s, index %u\n", set->name, index);
+
+	if (dim < set->type->dimension ||
+	    !(family == set->family || set->family == AF_UNSPEC))
+		return 0;
+
+	read_lock_bh(&set->lock);
+	ret = set->variant->kadt(set, skb, IPSET_TEST, family, dim, flags);
+	read_unlock_bh(&set->lock);
+
+	if (ret == -EAGAIN) {
+		/* Type requests element to be completed */
+		pr_debug("element must be competed, ADD is triggered\n");
+		write_lock_bh(&set->lock);
+		set->variant->kadt(set, skb, IPSET_ADD, family, dim, flags);
+		write_unlock_bh(&set->lock);
+		ret = 1;
+	}
+
+	/* Convert error codes to nomatch */
+	return (ret < 0 ? 0 : ret);
+}
+EXPORT_SYMBOL_GPL(ip_set_test);
+
+int
+ip_set_add(ip_set_id_t index, const struct sk_buff *skb,
+	   u8 family, u8 dim, u8 flags)
+{
+	struct ip_set *set = ip_set_list[index];
+	int ret;
+
+	BUG_ON(set == NULL || atomic_read(&set->ref) == 0);
+	pr_debug("set %s, index %u\n", set->name, index);
+
+	if (dim < set->type->dimension ||
+	    !(family == set->family || set->family == AF_UNSPEC))
+		return 0;
+
+	write_lock_bh(&set->lock);
+	ret = set->variant->kadt(set, skb, IPSET_ADD, family, dim, flags);
+	write_unlock_bh(&set->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(ip_set_add);
+
+int
+ip_set_del(ip_set_id_t index, const struct sk_buff *skb,
+	   u8 family, u8 dim, u8 flags)
+{
+	struct ip_set *set = ip_set_list[index];
+	int ret = 0;
+
+	BUG_ON(set == NULL || atomic_read(&set->ref) == 0);
+	pr_debug("set %s, index %u\n", set->name, index);
+
+	if (dim < set->type->dimension ||
+	    !(family == set->family || set->family == AF_UNSPEC))
+		return 0;
+
+	write_lock_bh(&set->lock);
+	ret = set->variant->kadt(set, skb, IPSET_DEL, family, dim, flags);
+	write_unlock_bh(&set->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(ip_set_del);
+
+/*
+ * Find set by name, reference it once. The reference makes sure the
+ * thing pointed to, does not go away under our feet.
+ *
+ * The nfnl mutex must already be activated.
+ */
+ip_set_id_t
+ip_set_get_byname(const char *name, struct ip_set **set)
+{
+	ip_set_id_t i, index = IPSET_INVALID_ID;
+	struct ip_set *s;
+
+	for (i = 0; i < ip_set_max; i++) {
+		s = ip_set_list[i];
+		if (s != NULL && STREQ(s->name, name)) {
+			__ip_set_get(i);
+			index = i;
+			*set = s;
+		}
+	}
+
+	return index;
+}
+EXPORT_SYMBOL_GPL(ip_set_get_byname);
+
+/*
+ * If the given set pointer points to a valid set, decrement
+ * reference count by 1. The caller shall not assume the index
+ * to be valid, after calling this function.
+ *
+ * The nfnl mutex must already be activated.
+ */
+void
+ip_set_put_byindex(ip_set_id_t index)
+{
+	if (ip_set_list[index] != NULL) {
+		BUG_ON(atomic_read(&ip_set_list[index]->ref) == 0);
+		__ip_set_put(index);
+	}
+}
+EXPORT_SYMBOL_GPL(ip_set_put_byindex);
+
+/*
+ * Get the name of a set behind a set index.
+ * We assume the set is referenced, so it does exist and
+ * can't be destroyed. The set cannot be renamed due to
+ * the referencing either.
+ *
+ * The nfnl mutex must already be activated.
+ */
+const char *
+ip_set_name_byindex(ip_set_id_t index)
+{
+	const struct ip_set *set = ip_set_list[index];
+
+	BUG_ON(set == NULL);
+	BUG_ON(atomic_read(&set->ref) == 0);
+
+	/* Referenced, so it's safe */
+	return set->name;
+}
+EXPORT_SYMBOL_GPL(ip_set_name_byindex);
+
+/*
+ * Routines to call by external subsystems, which do not
+ * call nfnl_lock for us.
+ */
+
+/*
+ * Find set by name, reference it once. The reference makes sure the
+ * thing pointed to, does not go away under our feet.
+ *
+ * The nfnl mutex is used in the function.
+ */
+ip_set_id_t
+ip_set_nfnl_get(const char *name)
+{
+	struct ip_set *s;
+	ip_set_id_t index;
+
+	nfnl_lock();
+	index = ip_set_get_byname(name, &s);
+	nfnl_unlock();
+
+	return index;
+}
+EXPORT_SYMBOL_GPL(ip_set_nfnl_get);
+
+/*
+ * Find set by index, reference it once. The reference makes sure the
+ * thing pointed to, does not go away under our feet.
+ *
+ * The nfnl mutex is used in the function.
+ */
+ip_set_id_t
+ip_set_nfnl_get_byindex(ip_set_id_t index)
+{
+	if (index > ip_set_max)
+		return IPSET_INVALID_ID;
+
+	nfnl_lock();
+	if (ip_set_list[index])
+		__ip_set_get(index);
+	else
+		index = IPSET_INVALID_ID;
+	nfnl_unlock();
+
+	return index;
+}
+EXPORT_SYMBOL_GPL(ip_set_nfnl_get_byindex);
+
+/*
+ * If the given set pointer points to a valid set, decrement
+ * reference count by 1. The caller shall not assume the index
+ * to be valid, after calling this function.
+ *
+ * The nfnl mutex is used in the function.
+ */
+void
+ip_set_nfnl_put(ip_set_id_t index)
+{
+	nfnl_lock();
+	if (ip_set_list[index] != NULL) {
+		BUG_ON(atomic_read(&ip_set_list[index]->ref) == 0);
+		__ip_set_put(index);
+	}
+	nfnl_unlock();
+}
+EXPORT_SYMBOL_GPL(ip_set_nfnl_put);
+
+/*
+ * Communication protocol with userspace over netlink.
+ *
+ * We already locked by nfnl_lock.
+ */
+
+static inline bool
+protocol_failed(const struct nlattr * const tb[])
+{
+	return !tb[IPSET_ATTR_PROTOCOL] ||
+	       nla_get_u8(tb[IPSET_ATTR_PROTOCOL]) != IPSET_PROTOCOL;
+}
+
+static inline u32
+flag_exist(const struct nlmsghdr *nlh)
+{
+	return nlh->nlmsg_flags & NLM_F_EXCL ? 0 : IPSET_FLAG_EXIST;
+}
+
+static struct nlmsghdr *
+start_msg(struct sk_buff *skb, u32 pid, u32 seq, unsigned int flags,
+	  enum ipset_cmd cmd)
+{
+	struct nlmsghdr *nlh;
+	struct nfgenmsg *nfmsg;
+
+	nlh = nlmsg_put(skb, pid, seq, cmd | (NFNL_SUBSYS_IPSET << 8),
+			sizeof(*nfmsg), flags);
+	if (nlh == NULL)
+		return NULL;
+
+	nfmsg = nlmsg_data(nlh);
+	nfmsg->nfgen_family = AF_INET;
+	nfmsg->version = NFNETLINK_V0;
+	nfmsg->res_id = 0;
+
+	return nlh;
+}
+
+/* Create a set */
+
+static const struct nla_policy ip_set_create_policy[IPSET_ATTR_CMD_MAX + 1] = {
+	[IPSET_ATTR_PROTOCOL]	= { .type = NLA_U8 },
+	[IPSET_ATTR_SETNAME]	= { .type = NLA_NUL_STRING,
+				    .len = IPSET_MAXNAMELEN - 1 },
+	[IPSET_ATTR_TYPENAME]	= { .type = NLA_NUL_STRING,
+				    .len = IPSET_MAXNAMELEN - 1},
+	[IPSET_ATTR_REVISION]	= { .type = NLA_U8 },
+	[IPSET_ATTR_FAMILY]	= { .type = NLA_U8 },
+	[IPSET_ATTR_DATA]	= { .type = NLA_NESTED },
+};
+
+static ip_set_id_t
+find_set_id(const char *name)
+{
+	ip_set_id_t i, index = IPSET_INVALID_ID;
+	const struct ip_set *set;
+
+	for (i = 0; index == IPSET_INVALID_ID && i < ip_set_max; i++) {
+		set = ip_set_list[i];
+		if (set != NULL && STREQ(set->name, name))
+			index = i;
+	}
+	return index;
+}
+
+static inline struct ip_set *
+find_set(const char *name)
+{
+	ip_set_id_t index = find_set_id(name);
+
+	return index == IPSET_INVALID_ID ? NULL : ip_set_list[index];
+}
+
+static int
+find_free_id(const char *name, ip_set_id_t *index, struct ip_set **set)
+{
+	ip_set_id_t i;
+
+	*index = IPSET_INVALID_ID;
+	for (i = 0;  i < ip_set_max; i++) {
+		if (ip_set_list[i] == NULL) {
+			if (*index == IPSET_INVALID_ID)
+				*index = i;
+		} else if (STREQ(name, ip_set_list[i]->name)) {
+			/* Name clash */
+			*set = ip_set_list[i];
+			return -EEXIST;
+		}
+	}
+	if (*index == IPSET_INVALID_ID)
+		/* No free slot remained */
+		return -IPSET_ERR_MAX_SETS;
+	return 0;
+}
+
+static int
+ip_set_create(struct sock *ctnl, struct sk_buff *skb,
+	      const struct nlmsghdr *nlh,
+	      const struct nlattr * const attr[])
+{
+	struct ip_set *set, *clash;
+	ip_set_id_t index = IPSET_INVALID_ID;
+	struct nlattr *tb[IPSET_ATTR_CREATE_MAX+1] = {};
+	const char *name, *typename;
+	u8 family, revision;
+	u32 flags = flag_exist(nlh);
+	int ret = 0;
+
+	if (unlikely(protocol_failed(attr) ||
+		     attr[IPSET_ATTR_SETNAME] == NULL ||
+		     attr[IPSET_ATTR_TYPENAME] == NULL ||
+		     attr[IPSET_ATTR_REVISION] == NULL ||
+		     attr[IPSET_ATTR_FAMILY] == NULL ||
+		     (attr[IPSET_ATTR_DATA] != NULL &&
+		      !flag_nested(attr[IPSET_ATTR_DATA]))))
+		return -IPSET_ERR_PROTOCOL;
+
+	name = nla_data(attr[IPSET_ATTR_SETNAME]);
+	typename = nla_data(attr[IPSET_ATTR_TYPENAME]);
+	family = nla_get_u8(attr[IPSET_ATTR_FAMILY]);
+	revision = nla_get_u8(attr[IPSET_ATTR_REVISION]);
+	pr_debug("setname: %s, typename: %s, family: %s, revision: %u\n",
+		 name, typename, family_name(family), revision);
+
+	/*
+	 * First, and without any locks, allocate and initialize
+	 * a normal base set structure.
+	 */
+	set = kzalloc(sizeof(struct ip_set), GFP_KERNEL);
+	if (!set)
+		return -ENOMEM;
+	rwlock_init(&set->lock);
+	strlcpy(set->name, name, IPSET_MAXNAMELEN);
+	atomic_set(&set->ref, 0);
+	set->family = family;
+
+	/*
+	 * Next, check that we know the type, and take
+	 * a reference on the type, to make sure it stays available
+	 * while constructing our new set.
+	 *
+	 * After referencing the type, we try to create the type
+	 * specific part of the set without holding any locks.
+	 */
+	ret = find_set_type_get(typename, family, revision, &(set->type));
+	if (ret)
+		goto out;
+
+	/*
+	 * Without holding any locks, create private part.
+	 */
+	if (attr[IPSET_ATTR_DATA] &&
+	    nla_parse_nested(tb, IPSET_ATTR_CREATE_MAX, attr[IPSET_ATTR_DATA],
+			     set->type->create_policy)) {
+	    	ret = -IPSET_ERR_PROTOCOL;
+	    	goto put_out;
+	}
+
+	ret = set->type->create(set, tb, flags);
+	if (ret != 0)
+		goto put_out;
+
+	/* BTW, ret==0 here. */
+
+	/*
+	 * Here, we have a valid, constructed set and we are protected
+	 * by nfnl_lock. Find the first free index in ip_set_list and
+	 * check clashing.
+	 */
+	if ((ret = find_free_id(set->name, &index, &clash)) != 0) {
+		/* If this is the same set and requested, ignore error */
+		if (ret == -EEXIST &&
+		    (flags & IPSET_FLAG_EXIST) &&
+		    STREQ(set->type->name, clash->type->name) &&
+		    set->type->family == clash->type->family &&
+		    set->type->revision == clash->type->revision &&
+		    set->variant->same_set(set, clash))
+			ret = 0;
+		goto cleanup;
+	}
+
+	/*
+	 * Finally! Add our shiny new set to the list, and be done.
+	 */
+	pr_debug("create: '%s' created with index %u!\n", set->name, index);
+	ip_set_list[index] = set;
+
+	return ret;
+
+cleanup:
+	set->variant->destroy(set);
+put_out:
+	module_put(set->type->me);
+out:
+	kfree(set);
+	return ret;
+}
+
+/* Destroy sets */
+
+static const struct nla_policy
+ip_set_setname_policy[IPSET_ATTR_CMD_MAX + 1] = {
+	[IPSET_ATTR_PROTOCOL]	= { .type = NLA_U8 },
+	[IPSET_ATTR_SETNAME]	= { .type = NLA_NUL_STRING,
+				    .len = IPSET_MAXNAMELEN - 1 },
+};
+
+static void
+ip_set_destroy_set(ip_set_id_t index)
+{
+	struct ip_set *set = ip_set_list[index];
+
+	pr_debug("set: %s\n",  set->name);
+	ip_set_list[index] = NULL;
+
+	/* Must call it without holding any lock */
+	set->variant->destroy(set);
+	module_put(set->type->me);
+	kfree(set);
+}
+
+static int
+ip_set_destroy(struct sock *ctnl, struct sk_buff *skb,
+	       const struct nlmsghdr *nlh,
+	       const struct nlattr * const attr[])
+{
+	ip_set_id_t i;
+
+	if (unlikely(protocol_failed(attr)))
+		return -IPSET_ERR_PROTOCOL;
+
+	/* References are protected by the nfnl mutex */
+	if (!attr[IPSET_ATTR_SETNAME]) {
+		for (i = 0; i < ip_set_max; i++) {
+			if (ip_set_list[i] != NULL &&
+			    (atomic_read(&ip_set_list[i]->ref)))
+				return -IPSET_ERR_BUSY;
+		}
+		for (i = 0; i < ip_set_max; i++) {
+			if (ip_set_list[i] != NULL)
+				ip_set_destroy_set(i);
+		}
+	} else {
+		i = find_set_id(nla_data(attr[IPSET_ATTR_SETNAME]));
+		if (i == IPSET_INVALID_ID)
+			return -ENOENT;
+		else if (atomic_read(&ip_set_list[i]->ref))
+			return -IPSET_ERR_BUSY;
+
+		ip_set_destroy_set(i);
+	}
+	return 0;
+}
+
+/* Flush sets */
+
+static void
+ip_set_flush_set(struct ip_set *set)
+{
+	pr_debug("set: %s\n",  set->name);
+
+	write_lock_bh(&set->lock);
+	set->variant->flush(set);
+	write_unlock_bh(&set->lock);
+}
+
+static int
+ip_set_flush(struct sock *ctnl, struct sk_buff *skb,
+	     const struct nlmsghdr *nlh,
+	     const struct nlattr * const attr[])
+{
+	ip_set_id_t i;
+
+	if (unlikely(protocol_failed(attr)))
+		return -EPROTO;
+
+	if (!attr[IPSET_ATTR_SETNAME]) {
+		for (i = 0; i < ip_set_max; i++)
+			if (ip_set_list[i] != NULL)
+				ip_set_flush_set(ip_set_list[i]);
+	} else {
+		i = find_set_id(nla_data(attr[IPSET_ATTR_SETNAME]));
+		if (i == IPSET_INVALID_ID)
+			return -ENOENT;
+
+		ip_set_flush_set(ip_set_list[i]);
+	}
+
+	return 0;
+}
+
+/* Rename a set */
+
+static const struct nla_policy
+ip_set_setname2_policy[IPSET_ATTR_CMD_MAX + 1] = {
+	[IPSET_ATTR_PROTOCOL]	= { .type = NLA_U8 },
+	[IPSET_ATTR_SETNAME]	= { .type = NLA_NUL_STRING,
+				    .len = IPSET_MAXNAMELEN - 1 },
+	[IPSET_ATTR_SETNAME2]	= { .type = NLA_NUL_STRING,
+				    .len = IPSET_MAXNAMELEN - 1 },
+};
+
+static int
+ip_set_rename(struct sock *ctnl, struct sk_buff *skb,
+	      const struct nlmsghdr *nlh,
+	      const struct nlattr * const attr[])
+{
+	struct ip_set *set;
+	const char *name2;
+	ip_set_id_t i;
+
+	if (unlikely(protocol_failed(attr) ||
+		     attr[IPSET_ATTR_SETNAME] == NULL ||
+		     attr[IPSET_ATTR_SETNAME2] == NULL))
+		return -IPSET_ERR_PROTOCOL;
+
+	set = find_set(nla_data(attr[IPSET_ATTR_SETNAME]));
+	if (set == NULL)
+		return -ENOENT;
+	if (atomic_read(&set->ref) != 0)
+		return -IPSET_ERR_REFERENCED;
+
+	name2 = nla_data(attr[IPSET_ATTR_SETNAME2]);
+	for (i = 0; i < ip_set_max; i++) {
+		if (ip_set_list[i] != NULL &&
+		    STREQ(ip_set_list[i]->name, name2))
+			return -IPSET_ERR_EXIST_SETNAME2;
+	}
+	strncpy(set->name, name2, IPSET_MAXNAMELEN);
+
+	return 0;
+}
+
+/* Swap two sets so that name/index points to the other.
+ * References and set names are also swapped.
+ *
+ * We are protected by the nfnl mutex and references are
+ * manipulated only by holding the mutex. The kernel interfaces
+ * do not hold the mutex but the pointer settings are atomic
+ * so the ip_set_list always contains valid pointers to the sets.
+ */
+
+static int
+ip_set_swap(struct sock *ctnl, struct sk_buff *skb,
+	    const struct nlmsghdr *nlh,
+	    const struct nlattr * const attr[])
+{
+	struct ip_set *from, *to;
+	ip_set_id_t from_id, to_id;
+	char from_name[IPSET_MAXNAMELEN];
+	u32 from_ref;
+
+	if (unlikely(protocol_failed(attr) ||
+		     attr[IPSET_ATTR_SETNAME] == NULL ||
+		     attr[IPSET_ATTR_SETNAME2] == NULL))
+		return -IPSET_ERR_PROTOCOL;
+
+	from_id = find_set_id(nla_data(attr[IPSET_ATTR_SETNAME]));
+	if (from_id == IPSET_INVALID_ID)
+		return -ENOENT;
+
+	to_id = find_set_id(nla_data(attr[IPSET_ATTR_SETNAME2]));
+	if (to_id == IPSET_INVALID_ID)
+		return -IPSET_ERR_EXIST_SETNAME2;
+
+	from = ip_set_list[from_id];
+	to = ip_set_list[to_id];
+
+	/* Features must not change.
+	 * Not an artifical restriction anymore, as we must prevent
+	 * possible loops created by swapping in setlist type of sets. */
+	if (!(from->type->features == to->type->features &&
+	      from->type->family == to->type->family))
+		return -IPSET_ERR_TYPE_MISMATCH;
+
+	/* No magic here: ref munging protected by the nfnl_lock */
+	strncpy(from_name, from->name, IPSET_MAXNAMELEN);
+	from_ref = atomic_read(&from->ref);
+
+	strncpy(from->name, to->name, IPSET_MAXNAMELEN);
+	atomic_set(&from->ref, atomic_read(&to->ref));
+	strncpy(to->name, from_name, IPSET_MAXNAMELEN);
+	atomic_set(&to->ref, from_ref);
+
+	ip_set_list[from_id] = to;
+	ip_set_list[to_id] = from;
+
+	return 0;
+}
+
+/* List/save set data */
+
+#define DUMP_INIT	0L
+#define DUMP_ALL	1L
+#define DUMP_ONE	2L
+#define DUMP_LAST	3L
+
+static int
+ip_set_dump_done(struct netlink_callback *cb)
+{
+	if (cb->args[2]) {
+		pr_debug("release set %s\n", ip_set_list[cb->args[1]]->name);
+		__ip_set_put((ip_set_id_t) cb->args[1]);
+	}
+	return 0;
+}
+
+static inline void
+dump_attrs(struct nlmsghdr *nlh)
+{
+	const struct nlattr *attr;
+	int rem;
+
+	pr_debug("dump nlmsg\n");
+	nlmsg_for_each_attr(attr, nlh, sizeof(struct nfgenmsg), rem) {
+		pr_debug("type: %u, len %u\n", nla_type(attr), attr->nla_len);
+	}
+}
+
+static int
+dump_init(struct netlink_callback *cb)
+{
+	struct nlmsghdr *nlh = nlmsg_hdr(cb->skb);
+	int min_len = NLMSG_SPACE(sizeof(struct nfgenmsg));
+	struct nlattr *cda[IPSET_ATTR_CMD_MAX+1];
+	struct nlattr *attr = (void *)nlh + min_len;
+	ip_set_id_t index;
+
+	/* Second pass, so parser can't fail */
+	nla_parse(cda, IPSET_ATTR_CMD_MAX,
+		  attr, nlh->nlmsg_len - min_len, ip_set_setname_policy);
+
+	/* cb->args[0] : dump single set/all sets
+	 *         [1] : set index
+	 *         [..]: type specific
+	 */
+
+	if (!cda[IPSET_ATTR_SETNAME]) {
+		cb->args[0] = DUMP_ALL;
+		return 0;
+	}
+
+	index = find_set_id(nla_data(cda[IPSET_ATTR_SETNAME]));
+	if (index == IPSET_INVALID_ID)
+		return -ENOENT;
+
+	cb->args[0] = DUMP_ONE;
+	cb->args[1] = index;
+	return 0;
+}
+
+static int
+ip_set_dump_start(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	ip_set_id_t index = IPSET_INVALID_ID, max;
+	struct ip_set *set = NULL;
+	struct nlmsghdr *nlh = NULL;
+	unsigned int flags = NETLINK_CB(cb->skb).pid ? NLM_F_MULTI : 0;
+	int ret = 0;
+
+	if (cb->args[0] == DUMP_INIT) {
+		ret = dump_init(cb);
+		if (ret < 0) {
+			nlh = nlmsg_hdr(cb->skb);
+			/* We have to create and send the error message
+			 * manually :-( */
+			if (nlh->nlmsg_flags & NLM_F_ACK)
+				netlink_ack(cb->skb, nlh, ret);
+			return ret;
+		}
+	}
+
+	if (cb->args[1] >= ip_set_max)
+		goto out;
+
+	pr_debug("args[0]: %ld args[1]: %ld\n", cb->args[0], cb->args[1]);
+	max = cb->args[0] == DUMP_ONE ? cb->args[1] + 1 : ip_set_max;
+	for (; cb->args[1] < max; cb->args[1]++) {
+		index = (ip_set_id_t) cb->args[1];
+		set = ip_set_list[index];
+		if (set == NULL) {
+			if (cb->args[0] == DUMP_ONE) {
+				ret = -ENOENT;
+				goto out;
+			}
+			continue;
+		}
+		/* When dumping all sets, we must dump "sorted"
+		 * so that lists (unions of sets) are dumped last.
+		 */
+		if (cb->args[0] != DUMP_ONE &&
+		    !((cb->args[0] == DUMP_ALL) ^
+		      (set->type->features & IPSET_DUMP_LAST)))
+			continue;
+		pr_debug("List set: %s\n", set->name);
+		if (!cb->args[2]) {
+			/* Start listing: make sure set won't be destroyed */
+			pr_debug("reference set\n");
+			__ip_set_get(index);
+		}
+		nlh = start_msg(skb, NETLINK_CB(cb->skb).pid,
+				cb->nlh->nlmsg_seq, flags,
+				IPSET_CMD_LIST);
+		if (!nlh) {
+			ret = -EMSGSIZE;
+			goto release_refcount;
+		}
+		NLA_PUT_U8(skb, IPSET_ATTR_PROTOCOL, IPSET_PROTOCOL);
+		NLA_PUT_STRING(skb, IPSET_ATTR_SETNAME, set->name);
+		switch (cb->args[2]) {
+		case 0:
+			/* Core header data */
+			NLA_PUT_STRING(skb, IPSET_ATTR_TYPENAME,
+				       set->type->name);
+			NLA_PUT_U8(skb, IPSET_ATTR_FAMILY,
+				   set->family);
+			NLA_PUT_U8(skb, IPSET_ATTR_REVISION,
+				   set->type->revision);
+			ret = set->variant->head(set, skb);
+			if (ret < 0)
+				goto release_refcount;
+			/* Fall through and add elements */
+		default:
+			read_lock_bh(&set->lock);
+			ret = set->variant->list(set, skb, cb);
+			read_unlock_bh(&set->lock);
+			if (!cb->args[2]) {
+				/* Set is done, proceed with next one */
+				if (cb->args[0] == DUMP_ONE)
+					cb->args[1] = IPSET_INVALID_ID;
+				else
+					cb->args[1]++;
+			}
+			goto release_refcount;
+		}
+	}
+	goto out;
+
+nla_put_failure:
+	ret = -EFAULT;
+release_refcount:
+	/* If there was an error or set is done, release set */
+	if (ret || !cb->args[2]) {
+		pr_debug("release set %s\n", ip_set_list[index]->name);
+		__ip_set_put(index);
+	}
+
+	/* If we dump all sets, continue with dumping last ones */
+	if (cb->args[0] == DUMP_ALL && cb->args[1] >= max && !cb->args[2])
+		cb->args[0] = DUMP_LAST;
+
+out:
+	if (nlh) {
+		nlmsg_end(skb, nlh);
+		pr_debug("nlmsg_len: %u\n", nlh->nlmsg_len);
+		dump_attrs(nlh);
+	}
+
+	return ret < 0 ? ret : skb->len;
+}
+
+static int
+ip_set_dump(struct sock *ctnl, struct sk_buff *skb,
+	    const struct nlmsghdr *nlh,
+	    const struct nlattr * const attr[])
+{
+	if (unlikely(protocol_failed(attr)))
+		return -IPSET_ERR_PROTOCOL;
+
+	return netlink_dump_start(ctnl, skb, nlh,
+				  ip_set_dump_start,
+				  ip_set_dump_done);
+}
+
+/* Add, del and test */
+
+static const struct nla_policy ip_set_adt_policy[IPSET_ATTR_CMD_MAX + 1] = {
+	[IPSET_ATTR_PROTOCOL]	= { .type = NLA_U8 },
+	[IPSET_ATTR_SETNAME]	= { .type = NLA_NUL_STRING,
+				    .len = IPSET_MAXNAMELEN - 1 },
+	[IPSET_ATTR_LINENO]	= { .type = NLA_U32 },
+	[IPSET_ATTR_DATA]	= { .type = NLA_NESTED },
+	[IPSET_ATTR_ADT]	= { .type = NLA_NESTED },
+};
+
+static int
+call_ad(struct sock *ctnl, struct sk_buff *skb, struct ip_set *set,
+	struct nlattr *tb[], enum ipset_adt adt,
+	u32 flags, bool use_lineno)
+{
+	int ret, retried = 0;
+	u32 lineno = 0;
+	bool eexist = flags & IPSET_FLAG_EXIST;
+
+	do {
+		write_lock_bh(&set->lock);
+		ret = set->variant->uadt(set, tb, adt, &lineno, flags);
+		write_unlock_bh(&set->lock);
+	} while (ret == -EAGAIN &&
+		 set->variant->resize &&
+		 (ret = set->variant->resize(set, retried++)) == 0);
+
+	if (!ret || (ret == -IPSET_ERR_EXIST && eexist))
+		return 0;
+	if (lineno && use_lineno) {
+		/* Error in restore/batch mode: send back lineno */
+		struct nlmsghdr *rep, *nlh = nlmsg_hdr(skb);
+		struct sk_buff *skb2;
+		struct nlmsgerr *errmsg;
+		size_t payload = sizeof(*errmsg) + nlmsg_len(nlh);
+		int min_len = NLMSG_SPACE(sizeof(struct nfgenmsg));
+		struct nlattr *cda[IPSET_ATTR_CMD_MAX+1];
+		struct nlattr *cmdattr;
+		u32 *errline;
+
+		skb2 = nlmsg_new(payload, GFP_KERNEL);
+		if (skb2 == NULL)
+			return -ENOMEM;
+		rep = __nlmsg_put(skb2, NETLINK_CB(skb).pid,
+				  nlh->nlmsg_seq, NLMSG_ERROR, payload, 0);
+		errmsg = nlmsg_data(rep);
+		errmsg->error = ret;
+		memcpy(&errmsg->msg, nlh, nlh->nlmsg_len);
+		cmdattr = (void *)&errmsg->msg + min_len;
+
+		nla_parse(cda, IPSET_ATTR_CMD_MAX,
+			  cmdattr, nlh->nlmsg_len - min_len,
+			  ip_set_adt_policy);
+
+		errline = nla_data(cda[IPSET_ATTR_LINENO]);
+
+		*errline = lineno;
+
+		netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
+		/* Signal netlink not to send its ACK/errmsg.  */
+		return -EINTR;
+	}
+
+	return ret;
+}
+
+static int
+ip_set_uadd(struct sock *ctnl, struct sk_buff *skb,
+	    const struct nlmsghdr *nlh,
+	    const struct nlattr * const attr[])
+{
+	struct ip_set *set;
+	struct nlattr *tb[IPSET_ATTR_ADT_MAX+1] = {};
+	const struct nlattr *nla;
+	u32 flags = flag_exist(nlh);
+	bool use_lineno;
+	int ret = 0;
+
+	if (unlikely(protocol_failed(attr) ||
+		     attr[IPSET_ATTR_SETNAME] == NULL ||
+		     !((attr[IPSET_ATTR_DATA] != NULL) ^
+		       (attr[IPSET_ATTR_ADT] != NULL)) ||
+		     (attr[IPSET_ATTR_DATA] != NULL &&
+		      !flag_nested(attr[IPSET_ATTR_DATA])) ||
+		     (attr[IPSET_ATTR_ADT] != NULL &&
+		      (!flag_nested(attr[IPSET_ATTR_ADT]) ||
+		       attr[IPSET_ATTR_LINENO] == NULL))))
+		return -IPSET_ERR_PROTOCOL;
+
+	set = find_set(nla_data(attr[IPSET_ATTR_SETNAME]));
+	if (set == NULL)
+		return -ENOENT;
+
+	use_lineno = !!attr[IPSET_ATTR_LINENO];
+	if (attr[IPSET_ATTR_DATA]) {
+		if (nla_parse_nested(tb, IPSET_ATTR_ADT_MAX,
+				     attr[IPSET_ATTR_DATA],
+				     set->type->adt_policy))
+			return -IPSET_ERR_PROTOCOL;
+		ret = call_ad(ctnl, skb, set, tb, IPSET_ADD, flags,
+			      use_lineno);
+	} else {
+		int nla_rem;
+
+		nla_for_each_nested(nla, attr[IPSET_ATTR_ADT], nla_rem) {
+			memset(tb, 0, sizeof(tb));
+			if (nla_type(nla) != IPSET_ATTR_DATA ||
+			    !flag_nested(nla) ||
+			    nla_parse_nested(tb, IPSET_ATTR_ADT_MAX, nla,
+					     set->type->adt_policy))
+				return -IPSET_ERR_PROTOCOL;
+			ret = call_ad(ctnl, skb, set, tb, IPSET_ADD,
+				      flags, use_lineno);
+			if (ret < 0)
+				return ret;
+		}
+	}
+	return ret;
+}
+
+static int
+ip_set_udel(struct sock *ctnl, struct sk_buff *skb,
+	    const struct nlmsghdr *nlh,
+	    const struct nlattr * const attr[])
+{
+	struct ip_set *set;
+	struct nlattr *tb[IPSET_ATTR_ADT_MAX+1] = {};
+	const struct nlattr *nla;
+	u32 flags = flag_exist(nlh);
+	bool use_lineno;
+	int ret = 0;
+
+	if (unlikely(protocol_failed(attr) ||
+		     attr[IPSET_ATTR_SETNAME] == NULL ||
+		     !((attr[IPSET_ATTR_DATA] != NULL) ^
+		       (attr[IPSET_ATTR_ADT] != NULL)) ||
+		     (attr[IPSET_ATTR_DATA] != NULL &&
+		      !flag_nested(attr[IPSET_ATTR_DATA])) ||
+		     (attr[IPSET_ATTR_ADT] != NULL &&
+		      (!flag_nested(attr[IPSET_ATTR_ADT]) ||
+		       attr[IPSET_ATTR_LINENO] == NULL))))
+		return -IPSET_ERR_PROTOCOL;
+
+	set = find_set(nla_data(attr[IPSET_ATTR_SETNAME]));
+	if (set == NULL)
+		return -ENOENT;
+
+	use_lineno = !!attr[IPSET_ATTR_LINENO];
+	if (attr[IPSET_ATTR_DATA]) {
+		if (nla_parse_nested(tb, IPSET_ATTR_ADT_MAX,
+				     attr[IPSET_ATTR_DATA],
+				     set->type->adt_policy))
+			return -IPSET_ERR_PROTOCOL;
+		ret = call_ad(ctnl, skb, set, tb, IPSET_DEL, flags,
+			      use_lineno);
+	} else {
+		int nla_rem;
+
+		nla_for_each_nested(nla, attr[IPSET_ATTR_ADT], nla_rem) {
+			memset(tb, 0, sizeof(*tb));
+			if (nla_type(nla) != IPSET_ATTR_DATA ||
+			    !flag_nested(nla) ||
+			    nla_parse_nested(tb, IPSET_ATTR_ADT_MAX, nla,
+					     set->type->adt_policy))
+				return -IPSET_ERR_PROTOCOL;
+			ret = call_ad(ctnl, skb, set, tb, IPSET_DEL,
+				      flags, use_lineno);
+			if (ret < 0)
+				return ret;
+		}
+	}
+	return ret;
+}
+
+static int
+ip_set_utest(struct sock *ctnl, struct sk_buff *skb,
+	     const struct nlmsghdr *nlh,
+	     const struct nlattr * const attr[])
+{
+	struct ip_set *set;
+	struct nlattr *tb[IPSET_ATTR_ADT_MAX+1] = {};
+	int ret = 0;
+
+	if (unlikely(protocol_failed(attr) ||
+		     attr[IPSET_ATTR_SETNAME] == NULL ||
+		     attr[IPSET_ATTR_DATA] == NULL ||
+		     !flag_nested(attr[IPSET_ATTR_DATA])))
+		return -IPSET_ERR_PROTOCOL;
+
+	set = find_set(nla_data(attr[IPSET_ATTR_SETNAME]));
+	if (set == NULL)
+		return -ENOENT;
+
+	if (nla_parse_nested(tb, IPSET_ATTR_ADT_MAX, attr[IPSET_ATTR_DATA],
+			     set->type->adt_policy))
+		return -IPSET_ERR_PROTOCOL;
+
+	read_lock_bh(&set->lock);
+	ret = set->variant->uadt(set, tb, IPSET_TEST, NULL, 0);
+	read_unlock_bh(&set->lock);
+	/* Userspace can't trigger element to be re-added */
+	if (ret == -EAGAIN)
+		ret = 1;
+
+	return ret < 0 ? ret : ret > 0 ? 0 : -IPSET_ERR_EXIST;
+}
+
+/* Get headed data of a set */
+
+static int
+ip_set_header(struct sock *ctnl, struct sk_buff *skb,
+	      const struct nlmsghdr *nlh,
+	      const struct nlattr * const attr[])
+{
+	const struct ip_set *set;
+	struct sk_buff *skb2;
+	struct nlmsghdr *nlh2;
+	ip_set_id_t index;
+	int ret = 0;
+
+	if (unlikely(protocol_failed(attr) ||
+		     attr[IPSET_ATTR_SETNAME] == NULL))
+		return -IPSET_ERR_PROTOCOL;
+
+	index = find_set_id(nla_data(attr[IPSET_ATTR_SETNAME]));
+	if (index == IPSET_INVALID_ID)
+		return -ENOENT;
+	set = ip_set_list[index];
+
+	skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (skb2 == NULL)
+		return -ENOMEM;
+
+	nlh2 = start_msg(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, 0,
+			 IPSET_CMD_HEADER);
+	if (!nlh2)
+		goto nlmsg_failure;
+	NLA_PUT_U8(skb2, IPSET_ATTR_PROTOCOL, IPSET_PROTOCOL);
+	NLA_PUT_STRING(skb2, IPSET_ATTR_SETNAME, set->name);
+	NLA_PUT_STRING(skb2, IPSET_ATTR_TYPENAME, set->type->name);
+	NLA_PUT_U8(skb2, IPSET_ATTR_FAMILY, set->family);
+	NLA_PUT_U8(skb2, IPSET_ATTR_REVISION, set->type->revision);
+	nlmsg_end(skb2, nlh2);
+
+	ret = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+
+nla_put_failure:
+	nlmsg_cancel(skb2, nlh2);
+nlmsg_failure:
+	kfree_skb(skb2);
+	return -EMSGSIZE;
+}
+
+/* Get type data */
+
+static const struct nla_policy ip_set_type_policy[IPSET_ATTR_CMD_MAX + 1] = {
+	[IPSET_ATTR_PROTOCOL]	= { .type = NLA_U8 },
+	[IPSET_ATTR_TYPENAME]	= { .type = NLA_NUL_STRING,
+				    .len = IPSET_MAXNAMELEN - 1 },
+	[IPSET_ATTR_FAMILY]	= { .type = NLA_U8 },
+};
+
+static int
+ip_set_type(struct sock *ctnl, struct sk_buff *skb,
+	    const struct nlmsghdr *nlh,
+	    const struct nlattr * const attr[])
+{
+	struct sk_buff *skb2;
+	struct nlmsghdr *nlh2;
+	u8 family, min, max;
+	const char *typename;
+	int ret = 0;
+
+	if (unlikely(protocol_failed(attr) ||
+		     attr[IPSET_ATTR_TYPENAME] == NULL ||
+		     attr[IPSET_ATTR_FAMILY] == NULL))
+		return -IPSET_ERR_PROTOCOL;
+
+	family = nla_get_u8(attr[IPSET_ATTR_FAMILY]);
+	typename = nla_data(attr[IPSET_ATTR_TYPENAME]);
+	ret = find_set_type_minmax(typename, family, &min, &max);
+	if (ret)
+		return ret;
+
+	skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (skb2 == NULL)
+		return -ENOMEM;
+
+	nlh2 = start_msg(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, 0,
+			 IPSET_CMD_TYPE);
+	if (!nlh2)
+		goto nlmsg_failure;
+	NLA_PUT_U8(skb2, IPSET_ATTR_PROTOCOL, IPSET_PROTOCOL);
+	NLA_PUT_STRING(skb2, IPSET_ATTR_TYPENAME, typename);
+	NLA_PUT_U8(skb2, IPSET_ATTR_FAMILY, family);
+	NLA_PUT_U8(skb2, IPSET_ATTR_REVISION, max);
+	NLA_PUT_U8(skb2, IPSET_ATTR_REVISION_MIN, min);
+	nlmsg_end(skb2, nlh2);
+
+	pr_debug("Send TYPE, nlmsg_len: %u\n", nlh2->nlmsg_len);
+	ret = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+
+nla_put_failure:
+	nlmsg_cancel(skb2, nlh2);
+nlmsg_failure:
+	kfree_skb(skb2);
+	return -EMSGSIZE;
+}
+
+/* Get protocol version */
+
+static const struct nla_policy
+ip_set_protocol_policy[IPSET_ATTR_CMD_MAX + 1] = {
+	[IPSET_ATTR_PROTOCOL]	= { .type = NLA_U8 },
+};
+
+static int
+ip_set_protocol(struct sock *ctnl, struct sk_buff *skb,
+		const struct nlmsghdr *nlh,
+		const struct nlattr * const attr[])
+{
+	struct sk_buff *skb2;
+	struct nlmsghdr *nlh2;
+	int ret = 0;
+
+	if (unlikely(attr[IPSET_ATTR_PROTOCOL] == NULL))
+		return -IPSET_ERR_PROTOCOL;
+
+	skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (skb2 == NULL)
+		return -ENOMEM;
+
+	nlh2 = start_msg(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, 0,
+			 IPSET_CMD_PROTOCOL);
+	if (!nlh2)
+		goto nlmsg_failure;
+	NLA_PUT_U8(skb2, IPSET_ATTR_PROTOCOL, IPSET_PROTOCOL);
+	nlmsg_end(skb2, nlh2);
+
+	ret = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+
+nla_put_failure:
+	nlmsg_cancel(skb2, nlh2);
+nlmsg_failure:
+	kfree_skb(skb2);
+	return -EMSGSIZE;
+}
+
+static const struct nfnl_callback ip_set_netlink_subsys_cb[IPSET_MSG_MAX] = {
+	[IPSET_CMD_CREATE]	= {
+		.call		= ip_set_create,
+		.attr_count	= IPSET_ATTR_CMD_MAX,
+		.policy		= ip_set_create_policy,
+	},
+	[IPSET_CMD_DESTROY]	= {
+		.call		= ip_set_destroy,
+		.attr_count	= IPSET_ATTR_CMD_MAX,
+		.policy		= ip_set_setname_policy,
+	},
+	[IPSET_CMD_FLUSH]	= {
+		.call		= ip_set_flush,
+		.attr_count	= IPSET_ATTR_CMD_MAX,
+		.policy		= ip_set_setname_policy,
+	},
+	[IPSET_CMD_RENAME]	= {
+		.call		= ip_set_rename,
+		.attr_count	= IPSET_ATTR_CMD_MAX,
+		.policy		= ip_set_setname2_policy,
+	},
+	[IPSET_CMD_SWAP]	= {
+		.call		= ip_set_swap,
+		.attr_count	= IPSET_ATTR_CMD_MAX,
+		.policy		= ip_set_setname2_policy,
+	},
+	[IPSET_CMD_LIST]	= {
+		.call		= ip_set_dump,
+		.attr_count	= IPSET_ATTR_CMD_MAX,
+		.policy		= ip_set_setname_policy,
+	},
+	[IPSET_CMD_SAVE]	= {
+		.call		= ip_set_dump,
+		.attr_count	= IPSET_ATTR_CMD_MAX,
+		.policy		= ip_set_setname_policy,
+	},
+	[IPSET_CMD_ADD]	= {
+		.call		= ip_set_uadd,
+		.attr_count	= IPSET_ATTR_CMD_MAX,
+		.policy		= ip_set_adt_policy,
+	},
+	[IPSET_CMD_DEL]	= {
+		.call		= ip_set_udel,
+		.attr_count	= IPSET_ATTR_CMD_MAX,
+		.policy		= ip_set_adt_policy,
+	},
+	[IPSET_CMD_TEST]	= {
+		.call		= ip_set_utest,
+		.attr_count	= IPSET_ATTR_CMD_MAX,
+		.policy		= ip_set_adt_policy,
+	},
+	[IPSET_CMD_HEADER]	= {
+		.call		= ip_set_header,
+		.attr_count	= IPSET_ATTR_CMD_MAX,
+		.policy		= ip_set_setname_policy,
+	},
+	[IPSET_CMD_TYPE]	= {
+		.call		= ip_set_type,
+		.attr_count	= IPSET_ATTR_CMD_MAX,
+		.policy		= ip_set_type_policy,
+	},
+	[IPSET_CMD_PROTOCOL]	= {
+		.call		= ip_set_protocol,
+		.attr_count	= IPSET_ATTR_CMD_MAX,
+		.policy		= ip_set_protocol_policy,
+	},
+};
+
+static struct nfnetlink_subsystem ip_set_netlink_subsys __read_mostly = {
+	.name		= "ip_set",
+	.subsys_id	= NFNL_SUBSYS_IPSET,
+	.cb_count	= IPSET_MSG_MAX,
+	.cb		= ip_set_netlink_subsys_cb,
+};
+
+/* Interface to iptables/ip6tables */
+
+static int
+ip_set_sockfn_get(struct sock *sk, int optval, void __user *user, int *len)
+{
+	unsigned *op;
+	void *data;
+	int copylen = *len, ret = 0;
+
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+	if (optval != SO_IP_SET)
+		return -EBADF;
+	if (*len < sizeof(unsigned))
+		return -EINVAL;
+
+	data = vmalloc(*len);
+	if (!data)
+		return -ENOMEM;
+	if (copy_from_user(data, user, *len) != 0) {
+		ret = -EFAULT;
+		goto done;
+	}
+	op = (unsigned *) data;
+
+	if (*op < IP_SET_OP_VERSION) {
+		/* Check the version at the beginning of operations */
+		struct ip_set_req_version *req_version = data;
+		if (req_version->version != IPSET_PROTOCOL) {
+			ret = -EPROTO;
+			goto done;
+		}
+	}
+
+	switch (*op) {
+	case IP_SET_OP_VERSION: {
+		struct ip_set_req_version *req_version = data;
+
+		if (*len != sizeof(struct ip_set_req_version)) {
+			ret = -EINVAL;
+			goto done;
+		}
+
+		req_version->version = IPSET_PROTOCOL;
+		ret = copy_to_user(user, req_version,
+				   sizeof(struct ip_set_req_version));
+		goto done;
+	}
+	case IP_SET_OP_GET_BYNAME: {
+		struct ip_set_req_get_set *req_get = data;
+
+		if (*len != sizeof(struct ip_set_req_get_set)) {
+			ret = -EINVAL;
+			goto done;
+		}
+		req_get->set.name[IPSET_MAXNAMELEN - 1] = '\0';
+		nfnl_lock();
+		req_get->set.index = find_set_id(req_get->set.name);
+		nfnl_unlock();
+		goto copy;
+	}
+	case IP_SET_OP_GET_BYINDEX: {
+		struct ip_set_req_get_set *req_get = data;
+
+		if (*len != sizeof(struct ip_set_req_get_set) ||
+		    req_get->set.index >= ip_set_max) {
+			ret = -EINVAL;
+			goto done;
+		}
+		nfnl_lock();
+		strncpy(req_get->set.name,
+			ip_set_list[req_get->set.index]
+				? ip_set_list[req_get->set.index]->name : "",
+			IPSET_MAXNAMELEN);
+		nfnl_unlock();
+		goto copy;
+	}
+	default:
+		ret = -EBADMSG;
+		goto done;
+	}	/* end of switch(op) */
+
+copy:
+	ret = copy_to_user(user, data, copylen);
+
+done:
+	vfree(data);
+	if (ret > 0)
+		ret = 0;
+	return ret;
+}
+
+static struct nf_sockopt_ops so_set __read_mostly = {
+	.pf		= PF_INET,
+	.get_optmin	= SO_IP_SET,
+	.get_optmax	= SO_IP_SET + 1,
+	.get		= &ip_set_sockfn_get,
+	.owner		= THIS_MODULE,
+};
+
+static int __init
+ip_set_init(void)
+{
+	int ret;
+
+	if (max_sets)
+		ip_set_max = max_sets;
+	if (ip_set_max >= IPSET_INVALID_ID)
+		ip_set_max = IPSET_INVALID_ID - 1;
+
+	ip_set_list = kzalloc(sizeof(struct ip_set *) * ip_set_max,
+			      GFP_KERNEL);
+	if (!ip_set_list) {
+		pr_err("ip_set: Unable to create ip_set_list\n");
+		return -ENOMEM;
+	}
+
+	ret = nfnetlink_subsys_register(&ip_set_netlink_subsys);
+	if (ret != 0) {
+		pr_err("ip_set: cannot register with nfnetlink.\n");
+		kfree(ip_set_list);
+		return ret;
+	}
+	ret = nf_register_sockopt(&so_set);
+	if (ret != 0) {
+		pr_err("SO_SET registry failed: %d\n", ret);
+		nfnetlink_subsys_unregister(&ip_set_netlink_subsys);
+		kfree(ip_set_list);
+		return ret;
+	}
+
+	pr_notice("ip_set: protocol %u\n", IPSET_PROTOCOL);
+	return 0;
+}
+
+static void __exit
+ip_set_fini(void)
+{
+	/* There can't be any existing set */
+	nf_unregister_sockopt(&so_set);
+	nfnetlink_subsys_unregister(&ip_set_netlink_subsys);
+	kfree(ip_set_list);
+	pr_debug("these are the famous last words\n");
+}
+
+module_init(ip_set_init);
+module_exit(ip_set_fini);

net/netfilter/ipset/ip_set_getport.c

···
+/* Copyright (C) 2003-2011 Jozsef Kadlecsik <[e-mail]>
+ *
+ * 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.
+ */
+
+/* Get Layer-4 data from the packets */
+
+#include <linux/ip.h>
+#include <linux/skbuff.h>
+#include <linux/icmp.h>
+#include <linux/icmpv6.h>
+#include <linux/netfilter_ipv6/ip6_tables.h>
+#include <net/ip.h>
+#include <net/ipv6.h>
+
+#include <linux/netfilter/ipset/ip_set_getport.h>
+
+/* We must handle non-linear skbs */
+static bool
+get_port(const struct sk_buff *skb, int protocol, unsigned int protooff,
+	 bool src, __be16 *port, u8 *proto)
+{
+	switch (protocol) {
+	case IPPROTO_TCP: {
+		struct tcphdr _tcph;
+		const struct tcphdr *th;
+
+		th = skb_header_pointer(skb, protooff, sizeof(_tcph), &_tcph);
+		if (th == NULL)
+			/* No choice either */
+			return false;
+
+		*port = src ? th->source : th->dest;
+		break;
+	}
+	case IPPROTO_UDP: {
+		struct udphdr _udph;
+		const struct udphdr *uh;
+
+		uh = skb_header_pointer(skb, protooff, sizeof(_udph), &_udph);
+		if (uh == NULL)
+			/* No choice either */
+			return false;
+
+		*port = src ? uh->source : uh->dest;
+		break;
+	}
+	case IPPROTO_ICMP: {
+		struct icmphdr _ich;
+		const struct icmphdr *ic;
+
+		ic = skb_header_pointer(skb, protooff, sizeof(_ich), &_ich);
+		if (ic == NULL)
+			return false;
+
+		*port = (__force __be16)htons((ic->type << 8) | ic->code);
+		break;
+	}
+	case IPPROTO_ICMPV6: {
+		struct icmp6hdr _ich;
+		const struct icmp6hdr *ic;
+
+		ic = skb_header_pointer(skb, protooff, sizeof(_ich), &_ich);
+		if (ic == NULL)
+			return false;
+
+		*port = (__force __be16)
+			htons((ic->icmp6_type << 8) | ic->icmp6_code);
+		break;
+	}
+	default:
+		break;
+	}
+	*proto = protocol;
+
+	return true;
+}
+
+bool
+ip_set_get_ip4_port(const struct sk_buff *skb, bool src,
+		    __be16 *port, u8 *proto)
+{
+	const struct iphdr *iph = ip_hdr(skb);
+	unsigned int protooff = ip_hdrlen(skb);
+	int protocol = iph->protocol;
+
+	/* See comments at tcp_match in ip_tables.c */
+	if (protocol <= 0 || (ntohs(iph->frag_off) & IP_OFFSET))
+		return false;
+
+	return get_port(skb, protocol, protooff, src, port, proto);
+}
+EXPORT_SYMBOL_GPL(ip_set_get_ip4_port);
+
+#if defined(CONFIG_IP6_NF_IPTABLES) || defined(CONFIG_IP6_NF_IPTABLES_MODULE)
+bool
+ip_set_get_ip6_port(const struct sk_buff *skb, bool src,
+		    __be16 *port, u8 *proto)
+{
+	int protoff;
+	u8 nexthdr;
+
+	nexthdr = ipv6_hdr(skb)->nexthdr;
+	protoff = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr), &nexthdr);
+	if (protoff < 0)
+		return false;
+
+	return get_port(skb, nexthdr, protoff, src, port, proto);
+}
+EXPORT_SYMBOL_GPL(ip_set_get_ip6_port);
+#endif
+
+bool
+ip_set_get_ip_port(const struct sk_buff *skb, u8 pf, bool src, __be16 *port)
+{
+	bool ret;
+	u8 proto;
+
+	switch (pf) {
+	case AF_INET:
+		ret = ip_set_get_ip4_port(skb, src, port, &proto);
+		break;
+	case AF_INET6:
+		ret = ip_set_get_ip6_port(skb, src, port, &proto);
+		break;
+	default:
+		return false;
+	}
+	if (!ret)
+		return ret;
+	switch (proto) {
+	case IPPROTO_TCP:
+	case IPPROTO_UDP:
+		return true;
+	default:
+		return false;
+	}
+}
+EXPORT_SYMBOL_GPL(ip_set_get_ip_port);

net/netfilter/ipset/ip_set_hash_ip.c

···
+/* Copyright (C) 2003-2011 Jozsef Kadlecsik <[e-mail]>
+ *
+ * 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:ip 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 <net/tcp.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 <[e-mail]>");
+MODULE_DESCRIPTION("hash:ip type of IP sets");
+MODULE_ALIAS("ip_set_hash:ip");
+
+/* Type specific function prefix */
+#define TYPE		hash_ip
+
+static bool
+hash_ip_same_set(const struct ip_set *a, const struct ip_set *b);
+
+#define hash_ip4_same_set	hash_ip_same_set
+#define hash_ip6_same_set	hash_ip_same_set
+
+/* The type variant functions: IPv4 */
+
+/* Member elements without timeout */
+struct hash_ip4_elem {
+	__be32 ip;
+};
+
+/* Member elements with timeout support */
+struct hash_ip4_telem {
+	__be32 ip;
+	unsigned long timeout;
+};
+
+static inline bool
+hash_ip4_data_equal(const struct hash_ip4_elem *ip1,
+		    const struct hash_ip4_elem *ip2)
+{
+	return ip1->ip == ip2->ip;
+}
+
+static inline bool
+hash_ip4_data_isnull(const struct hash_ip4_elem *elem)
+{
+	return elem->ip == 0;
+}
+
+static inline void
+hash_ip4_data_copy(struct hash_ip4_elem *dst, const struct hash_ip4_elem *src)
+{
+	dst->ip = src->ip;
+}
+
+/* Zero valued IP addresses cannot be stored */
+static inline void
+hash_ip4_data_zero_out(struct hash_ip4_elem *elem)
+{
+	elem->ip = 0;
+}
+
+static inline bool
+hash_ip4_data_list(struct sk_buff *skb, const struct hash_ip4_elem *data)
+{
+	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, data->ip);
+	return 0;
+
+nla_put_failure:
+	return 1;
+}
+
+static bool
+hash_ip4_data_tlist(struct sk_buff *skb, const struct hash_ip4_elem *data)
+{
+	const struct hash_ip4_telem *tdata =
+		(const struct hash_ip4_telem *)data;
+
+	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, tdata->ip);
+	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_NETMASK
+#define PF		4
+#define HOST_MASK	32
+#include <linux/netfilter/ipset/ip_set_ahash.h>
+
+static int
+hash_ip4_kadt(struct ip_set *set, const struct sk_buff *skb,
+	      enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
+{
+	const struct ip_set_hash *h = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	__be32 ip;
+
+	ip4addrptr(skb, flags & IPSET_DIM_ONE_SRC, &ip);
+	ip &= ip_set_netmask(h->netmask);
+	if (ip == 0)
+		return -EINVAL;
+
+	return adtfn(set, &ip, h->timeout);
+}
+
+static int
+hash_ip4_uadt(struct ip_set *set, struct nlattr *tb[],
+	      enum ipset_adt adt, u32 *lineno, u32 flags)
+{
+	const struct ip_set_hash *h = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	u32 ip, ip_to, hosts, timeout = h->timeout;
+	__be32 nip;
+	int ret = 0;
+
+	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;
+
+	ip &= ip_set_hostmask(h->netmask);
+
+	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) {
+		nip = htonl(ip);
+		if (nip == 0)
+			return -IPSET_ERR_HASH_ELEM;
+		return adtfn(set, &nip, timeout);
+	}
+
+	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);
+	} else if (tb[IPSET_ATTR_CIDR]) {
+		u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
+
+		if (cidr > 32)
+			return -IPSET_ERR_INVALID_CIDR;
+		ip &= ip_set_hostmask(cidr);
+		ip_to = ip | ~ip_set_hostmask(cidr);
+	} else
+		ip_to = ip;
+
+	hosts = h->netmask == 32 ? 1 : 2 << (32 - h->netmask - 1);
+
+	for (; !before(ip_to, ip); ip += hosts) {
+		nip = htonl(ip);
+		if (nip == 0)
+			return -IPSET_ERR_HASH_ELEM;
+		ret = adtfn(set, &nip, timeout);
+
+		if (ret && !ip_set_eexist(ret, flags))
+			return ret;
+		else
+			ret = 0;
+	}
+	return ret;
+}
+
+static bool
+hash_ip_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 &&
+	       x->netmask == y->netmask;
+}
+
+/* The type variant functions: IPv6 */
+
+struct hash_ip6_elem {
+	union nf_inet_addr ip;
+};
+
+struct hash_ip6_telem {
+	union nf_inet_addr ip;
+	unsigned long timeout;
+};
+
+static inline bool
+hash_ip6_data_equal(const struct hash_ip6_elem *ip1,
+		    const struct hash_ip6_elem *ip2)
+{
+	return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0;
+}
+
+static inline bool
+hash_ip6_data_isnull(const struct hash_ip6_elem *elem)
+{
+	return ipv6_addr_any(&elem->ip.in6);
+}
+
+static inline void
+hash_ip6_data_copy(struct hash_ip6_elem *dst, const struct hash_ip6_elem *src)
+{
+	ipv6_addr_copy(&dst->ip.in6, &src->ip.in6);
+}
+
+static inline void
+hash_ip6_data_zero_out(struct hash_ip6_elem *elem)
+{
+	ipv6_addr_set(&elem->ip.in6, 0, 0, 0, 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 bool
+hash_ip6_data_list(struct sk_buff *skb, const struct hash_ip6_elem *data)
+{
+	NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &data->ip);
+	return 0;
+
+nla_put_failure:
+	return 1;
+}
+
+static bool
+hash_ip6_data_tlist(struct sk_buff *skb, const struct hash_ip6_elem *data)
+{
+	const struct hash_ip6_telem *e =
+		(const struct hash_ip6_telem *)data;
+
+	NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &e->ip);
+	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 int
+hash_ip6_kadt(struct ip_set *set, const struct sk_buff *skb,
+	      enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
+{
+	const struct ip_set_hash *h = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	union nf_inet_addr ip;
+
+	ip6addrptr(skb, flags & IPSET_DIM_ONE_SRC, &ip.in6);
+	ip6_netmask(&ip, h->netmask);
+	if (ipv6_addr_any(&ip.in6))
+		return -EINVAL;
+
+	return adtfn(set, &ip, h->timeout);
+}
+
+static const struct nla_policy hash_ip6_adt_policy[IPSET_ATTR_ADT_MAX + 1] = {
+	[IPSET_ATTR_IP]		= { .type = NLA_NESTED },
+	[IPSET_ATTR_TIMEOUT]	= { .type = NLA_U32 },
+	[IPSET_ATTR_LINENO]	= { .type = NLA_U32 },
+};
+
+static int
+hash_ip6_uadt(struct ip_set *set, struct nlattr *tb[],
+	      enum ipset_adt adt, u32 *lineno, u32 flags)
+{
+	const struct ip_set_hash *h = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	union nf_inet_addr ip;
+	u32 timeout = h->timeout;
+	int ret;
+
+	if (unlikely(!tb[IPSET_ATTR_IP] ||
+		     !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
+		     tb[IPSET_ATTR_IP_TO] ||
+		     tb[IPSET_ATTR_CIDR]))
+		return -IPSET_ERR_PROTOCOL;
+
+	if (tb[IPSET_ATTR_LINENO])
+		*lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
+
+	ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &ip);
+	if (ret)
+		return ret;
+
+	ip6_netmask(&ip, h->netmask);
+	if (ipv6_addr_any(&ip.in6))
+		return -IPSET_ERR_HASH_ELEM;
+
+	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, &ip, timeout);
+
+	return ip_set_eexist(ret, flags) ? 0 : ret;
+}
+
+/* Create hash:ip type of sets */
+
+static int
+hash_ip_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
+{
+	u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
+	u8 netmask, hbits;
+	struct ip_set_hash *h;
+
+	if (!(set->family == AF_INET || set->family == AF_INET6))
+		return -IPSET_ERR_INVALID_FAMILY;
+	netmask = set->family == AF_INET ? 32 : 128;
+	pr_debug("Create set %s with family %s\n",
+		 set->name, set->family == AF_INET ? "inet" : "inet6");
+
+	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]);
+
+	if (tb[IPSET_ATTR_NETMASK]) {
+		netmask = nla_get_u8(tb[IPSET_ATTR_NETMASK]);
+
+		if ((set->family == AF_INET && netmask > 32) ||
+		    (set->family == AF_INET6 && netmask > 128) ||
+		    netmask == 0)
+			return -IPSET_ERR_INVALID_NETMASK;
+	}
+
+	h = kzalloc(sizeof(*h), GFP_KERNEL);
+	if (!h)
+		return -ENOMEM;
+
+	h->maxelem = maxelem;
+	h->netmask = netmask;
+	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_ip4_tvariant : &hash_ip6_tvariant;
+
+		if (set->family == AF_INET)
+			hash_ip4_gc_init(set);
+		else
+			hash_ip6_gc_init(set);
+	} else {
+		set->variant = set->family == AF_INET
+			? &hash_ip4_variant : &hash_ip6_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_ip_type __read_mostly = {
+	.name		= "hash:ip",
+	.protocol	= IPSET_PROTOCOL,
+	.features	= IPSET_TYPE_IP,
+	.dimension	= IPSET_DIM_ONE,
+	.family		= AF_UNSPEC,
+	.revision	= 0,
+	.create		= hash_ip_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 },
+		[IPSET_ATTR_NETMASK]	= { .type = NLA_U8  },
+	},
+	.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 },
+	},
+	.me		= THIS_MODULE,
+};
+
+static int __init
+hash_ip_init(void)
+{
+	return ip_set_type_register(&hash_ip_type);
+}
+
+static void __exit
+hash_ip_fini(void)
+{
+	ip_set_type_unregister(&hash_ip_type);
+}
+
+module_init(hash_ip_init);
+module_exit(hash_ip_fini);

net/netfilter/ipset/ip_set_hash_ipport.c

···
+/* Copyright (C) 2003-2011 Jozsef Kadlecsik <[e-mail]>
+ *
+ * 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:ip,port 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 <net/tcp.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_getport.h>
+#include <linux/netfilter/ipset/ip_set_hash.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jozsef Kadlecsik <[e-mail]>");
+MODULE_DESCRIPTION("hash:ip,port type of IP sets");
+MODULE_ALIAS("ip_set_hash:ip,port");
+
+/* Type specific function prefix */
+#define TYPE		hash_ipport
+
+static bool
+hash_ipport_same_set(const struct ip_set *a, const struct ip_set *b);
+
+#define hash_ipport4_same_set	hash_ipport_same_set
+#define hash_ipport6_same_set	hash_ipport_same_set
+
+/* The type variant functions: IPv4 */
+
+/* Member elements without timeout */
+struct hash_ipport4_elem {
+	__be32 ip;
+	__be16 port;
+	u8 proto;
+	u8 padding;
+};
+
+/* Member elements with timeout support */
+struct hash_ipport4_telem {
+	__be32 ip;
+	__be16 port;
+	u8 proto;
+	u8 padding;
+	unsigned long timeout;
+};
+
+static inline bool
+hash_ipport4_data_equal(const struct hash_ipport4_elem *ip1,
+			const struct hash_ipport4_elem *ip2)
+{
+	return ip1->ip == ip2->ip &&
+	       ip1->port == ip2->port &&
+	       ip1->proto == ip2->proto;
+}
+
+static inline bool
+hash_ipport4_data_isnull(const struct hash_ipport4_elem *elem)
+{
+	return elem->proto == 0;
+}
+
+static inline void
+hash_ipport4_data_copy(struct hash_ipport4_elem *dst,
+		       const struct hash_ipport4_elem *src)
+{
+	dst->ip = src->ip;
+	dst->port = src->port;
+	dst->proto = src->proto;
+}
+
+static inline void
+hash_ipport4_data_zero_out(struct hash_ipport4_elem *elem)
+{
+	elem->proto = 0;
+}
+
+static bool
+hash_ipport4_data_list(struct sk_buff *skb,
+		       const struct hash_ipport4_elem *data)
+{
+	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, data->ip);
+	NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
+	NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
+	return 0;
+
+nla_put_failure:
+	return 1;
+}
+
+static bool
+hash_ipport4_data_tlist(struct sk_buff *skb,
+			const struct hash_ipport4_elem *data)
+{
+	const struct hash_ipport4_telem *tdata =
+		(const struct hash_ipport4_telem *)data;
+
+	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, tdata->ip);
+	NLA_PUT_NET16(skb, IPSET_ATTR_PORT, tdata->port);
+	NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
+	NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
+		      htonl(ip_set_timeout_get(tdata->timeout)));
+
+	return 0;
+
+nla_put_failure:
+	return 1;
+}
+
+#define PF		4
+#define HOST_MASK	32
+#include <linux/netfilter/ipset/ip_set_ahash.h>
+
+static int
+hash_ipport4_kadt(struct ip_set *set, const struct sk_buff *skb,
+		  enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
+{
+	const struct ip_set_hash *h = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	struct hash_ipport4_elem data = { };
+
+	if (!ip_set_get_ip4_port(skb, flags & IPSET_DIM_TWO_SRC,
+				 &data.port, &data.proto))
+		return -EINVAL;
+
+	ip4addrptr(skb, flags & IPSET_DIM_ONE_SRC, &data.ip);
+
+	return adtfn(set, &data, h->timeout);
+}
+
+static int
+hash_ipport4_uadt(struct ip_set *set, struct nlattr *tb[],
+		  enum ipset_adt adt, u32 *lineno, u32 flags)
+{
+	const struct ip_set_hash *h = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	struct hash_ipport4_elem data = { };
+	u32 ip, ip_to, p, port, port_to;
+	u32 timeout = h->timeout;
+	int ret;
+
+	if (unlikely(!tb[IPSET_ATTR_IP] ||
+		     !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
+		     !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
+		     !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_ipaddr4(tb[IPSET_ATTR_IP], &data.ip);
+	if (ret)
+		return ret;
+
+	if (tb[IPSET_ATTR_PORT])
+		data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
+	else
+		return -IPSET_ERR_PROTOCOL;
+
+	if (tb[IPSET_ATTR_PROTO]) {
+		data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
+
+		if (data.proto == 0)
+			return -IPSET_ERR_INVALID_PROTO;
+	} else
+		return -IPSET_ERR_MISSING_PROTO;
+
+	switch (data.proto) {
+	case IPPROTO_UDP:
+	case IPPROTO_TCP:
+	case IPPROTO_ICMP:
+		break;
+	default:
+		data.port = 0;
+		break;
+	}
+
+	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 ||
+	    !(data.proto == IPPROTO_TCP || data.proto == IPPROTO_UDP) ||
+	    !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
+	      tb[IPSET_ATTR_PORT_TO])) {
+		ret = adtfn(set, &data, timeout);
+		return ip_set_eexist(ret, flags) ? 0 : ret;
+	}
+
+	ip = ntohl(data.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 > ip_to)
+			swap(ip, ip_to);
+	} else if (tb[IPSET_ATTR_CIDR]) {
+		u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
+
+		if (cidr > 32)
+			return -IPSET_ERR_INVALID_CIDR;
+		ip &= ip_set_hostmask(cidr);
+		ip_to = ip | ~ip_set_hostmask(cidr);
+	} else
+		ip_to = ip;
+
+	port = ntohs(data.port);
+	if (tb[IPSET_ATTR_PORT_TO]) {
+		port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
+		if (port > port_to)
+			swap(port, port_to);
+	} else
+		port_to = port;
+
+	for (; !before(ip_to, ip); ip++)
+		for (p = port; p <= port_to; p++) {
+			data.ip = htonl(ip);
+			data.port = htons(p);
+			ret = adtfn(set, &data, timeout);
+
+			if (ret && !ip_set_eexist(ret, flags))
+				return ret;
+			else
+				ret = 0;
+		}
+	return ret;
+}
+
+static bool
+hash_ipport_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_ipport6_elem {
+	union nf_inet_addr ip;
+	__be16 port;
+	u8 proto;
+	u8 padding;
+};
+
+struct hash_ipport6_telem {
+	union nf_inet_addr ip;
+	__be16 port;
+	u8 proto;
+	u8 padding;
+	unsigned long timeout;
+};
+
+static inline bool
+hash_ipport6_data_equal(const struct hash_ipport6_elem *ip1,
+			const struct hash_ipport6_elem *ip2)
+{
+	return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 &&
+	       ip1->port == ip2->port &&
+	       ip1->proto == ip2->proto;
+}
+
+static inline bool
+hash_ipport6_data_isnull(const struct hash_ipport6_elem *elem)
+{
+	return elem->proto == 0;
+}
+
+static inline void
+hash_ipport6_data_copy(struct hash_ipport6_elem *dst,
+		       const struct hash_ipport6_elem *src)
+{
+	memcpy(dst, src, sizeof(*dst));
+}
+
+static inline void
+hash_ipport6_data_zero_out(struct hash_ipport6_elem *elem)
+{
+	elem->proto = 0;
+}
+
+static bool
+hash_ipport6_data_list(struct sk_buff *skb,
+		       const struct hash_ipport6_elem *data)
+{
+	NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &data->ip);
+	NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
+	NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
+	return 0;
+
+nla_put_failure:
+	return 1;
+}
+
+static bool
+hash_ipport6_data_tlist(struct sk_buff *skb,
+			const struct hash_ipport6_elem *data)
+{
+	const struct hash_ipport6_telem *e =
+		(const struct hash_ipport6_telem *)data;
+
+	NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &e->ip);
+	NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
+	NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
+	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 int
+hash_ipport6_kadt(struct ip_set *set, const struct sk_buff *skb,
+		  enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
+{
+	const struct ip_set_hash *h = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	struct hash_ipport6_elem data = { };
+
+	if (!ip_set_get_ip6_port(skb, flags & IPSET_DIM_TWO_SRC,
+				 &data.port, &data.proto))
+		return -EINVAL;
+
+	ip6addrptr(skb, flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
+
+	return adtfn(set, &data, h->timeout);
+}
+
+static int
+hash_ipport6_uadt(struct ip_set *set, struct nlattr *tb[],
+		  enum ipset_adt adt, u32 *lineno, u32 flags)
+{
+	const struct ip_set_hash *h = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	struct hash_ipport6_elem data = { };
+	u32 port, port_to;
+	u32 timeout = h->timeout;
+	int ret;
+
+	if (unlikely(!tb[IPSET_ATTR_IP] ||
+		     !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
+		     !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
+		     !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
+		     tb[IPSET_ATTR_IP_TO] ||
+		     tb[IPSET_ATTR_CIDR]))
+		return -IPSET_ERR_PROTOCOL;
+
+	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_PORT])
+		data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
+	else
+		return -IPSET_ERR_PROTOCOL;
+
+	if (tb[IPSET_ATTR_PROTO]) {
+		data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
+
+		if (data.proto == 0)
+			return -IPSET_ERR_INVALID_PROTO;
+	} else
+		return -IPSET_ERR_MISSING_PROTO;
+
+	switch (data.proto) {
+	case IPPROTO_UDP:
+	case IPPROTO_TCP:
+	case IPPROTO_ICMPV6:
+		break;
+	default:
+		data.port = 0;
+		break;
+	}
+
+	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 ||
+	    !(data.proto == IPPROTO_TCP || data.proto == IPPROTO_UDP) ||
+	    !tb[IPSET_ATTR_PORT_TO]) {
+		ret = adtfn(set, &data, timeout);
+		return ip_set_eexist(ret, flags) ? 0 : ret;
+	}
+
+	port = ntohs(data.port);
+	port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
+	if (port > port_to)
+		swap(port, port_to);
+
+	for (; port <= port_to; port++) {
+		data.port = htons(port);
+		ret = adtfn(set, &data, timeout);
+
+		if (ret && !ip_set_eexist(ret, flags))
+			return ret;
+		else
+			ret = 0;
+	}
+	return ret;
+}
+
+/* Create hash:ip type of sets */
+
+static int
+hash_ipport_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
+{
+	struct ip_set_hash *h;
+	u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
+	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), 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_ipport4_tvariant : &hash_ipport6_tvariant;
+
+		if (set->family == AF_INET)
+			hash_ipport4_gc_init(set);
+		else
+			hash_ipport6_gc_init(set);
+	} else {
+		set->variant = set->family == AF_INET
+			? &hash_ipport4_variant : &hash_ipport6_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_ipport_type __read_mostly = {
+	.name		= "hash:ip,port",
+	.protocol	= IPSET_PROTOCOL,
+	.features	= IPSET_TYPE_IP | IPSET_TYPE_PORT,
+	.dimension	= IPSET_DIM_TWO,
+	.family		= AF_UNSPEC,
+	.revision	= 0,
+	.create		= hash_ipport_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_PROTO]	= { .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_PORT]	= { .type = NLA_U16 },
+		[IPSET_ATTR_PORT_TO]	= { .type = NLA_U16 },
+		[IPSET_ATTR_CIDR]	= { .type = NLA_U8 },
+		[IPSET_ATTR_PROTO]	= { .type = NLA_U8 },
+		[IPSET_ATTR_TIMEOUT]	= { .type = NLA_U32 },
+		[IPSET_ATTR_LINENO]	= { .type = NLA_U32 },
+	},
+	.me		= THIS_MODULE,
+};
+
+static int __init
+hash_ipport_init(void)
+{
+	return ip_set_type_register(&hash_ipport_type);
+}
+
+static void __exit
+hash_ipport_fini(void)
+{
+	ip_set_type_unregister(&hash_ipport_type);
+}
+
+module_init(hash_ipport_init);
+module_exit(hash_ipport_fini);

net/netfilter/ipset/ip_set_hash_ipportip.c

···
+/* Copyright (C) 2003-2011 Jozsef Kadlecsik <[e-mail]>
+ *
+ * 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:ip,port,ip 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 <net/tcp.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_getport.h>
+#include <linux/netfilter/ipset/ip_set_hash.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jozsef Kadlecsik <[e-mail]>");
+MODULE_DESCRIPTION("hash:ip,port,ip type of IP sets");
+MODULE_ALIAS("ip_set_hash:ip,port,ip");
+
+/* Type specific function prefix */
+#define TYPE		hash_ipportip
+
+static bool
+hash_ipportip_same_set(const struct ip_set *a, const struct ip_set *b);
+
+#define hash_ipportip4_same_set	hash_ipportip_same_set
+#define hash_ipportip6_same_set	hash_ipportip_same_set
+
+/* The type variant functions: IPv4 */
+
+/* Member elements without timeout */
+struct hash_ipportip4_elem {
+	__be32 ip;
+	__be32 ip2;
+	__be16 port;
+	u8 proto;
+	u8 padding;
+};
+
+/* Member elements with timeout support */
+struct hash_ipportip4_telem {
+	__be32 ip;
+	__be32 ip2;
+	__be16 port;
+	u8 proto;
+	u8 padding;
+	unsigned long timeout;
+};
+
+static inline bool
+hash_ipportip4_data_equal(const struct hash_ipportip4_elem *ip1,
+			  const struct hash_ipportip4_elem *ip2)
+{
+	return ip1->ip == ip2->ip &&
+	       ip1->ip2 == ip2->ip2 &&
+	       ip1->port == ip2->port &&
+	       ip1->proto == ip2->proto;
+}
+
+static inline bool
+hash_ipportip4_data_isnull(const struct hash_ipportip4_elem *elem)
+{
+	return elem->proto == 0;
+}
+
+static inline void
+hash_ipportip4_data_copy(struct hash_ipportip4_elem *dst,
+			 const struct hash_ipportip4_elem *src)
+{
+	memcpy(dst, src, sizeof(*dst));
+}
+
+static inline void
+hash_ipportip4_data_zero_out(struct hash_ipportip4_elem *elem)
+{
+	elem->proto = 0;
+}
+
+static bool
+hash_ipportip4_data_list(struct sk_buff *skb,
+		       const struct hash_ipportip4_elem *data)
+{
+	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, data->ip);
+	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP2, data->ip2);
+	NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
+	NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
+	return 0;
+
+nla_put_failure:
+	return 1;
+}
+
+static bool
+hash_ipportip4_data_tlist(struct sk_buff *skb,
+			const struct hash_ipportip4_elem *data)
+{
+	const struct hash_ipportip4_telem *tdata =
+		(const struct hash_ipportip4_telem *)data;
+
+	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, tdata->ip);
+	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP2, tdata->ip2);
+	NLA_PUT_NET16(skb, IPSET_ATTR_PORT, tdata->port);
+	NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
+	NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
+		      htonl(ip_set_timeout_get(tdata->timeout)));
+
+	return 0;
+
+nla_put_failure:
+	return 1;
+}
+
+#define PF		4
+#define HOST_MASK	32
+#include <linux/netfilter/ipset/ip_set_ahash.h>
+
+static int
+hash_ipportip4_kadt(struct ip_set *set, const struct sk_buff *skb,
+		    enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
+{
+	const struct ip_set_hash *h = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	struct hash_ipportip4_elem data = { };
+
+	if (!ip_set_get_ip4_port(skb, flags & IPSET_DIM_TWO_SRC,
+				 &data.port, &data.proto))
+		return -EINVAL;
+
+	ip4addrptr(skb, flags & IPSET_DIM_ONE_SRC, &data.ip);
+	ip4addrptr(skb, flags & IPSET_DIM_THREE_SRC, &data.ip2);
+
+	return adtfn(set, &data, h->timeout);
+}
+
+static int
+hash_ipportip4_uadt(struct ip_set *set, struct nlattr *tb[],
+		    enum ipset_adt adt, u32 *lineno, u32 flags)
+{
+	const struct ip_set_hash *h = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	struct hash_ipportip4_elem data = { };
+	u32 ip, ip_to, p, port, port_to;
+	u32 timeout = h->timeout;
+	int ret;
+
+	if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
+		     !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
+		     !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
+		     !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_ipaddr4(tb[IPSET_ATTR_IP], &data.ip);
+	if (ret)
+		return ret;
+
+	ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP2], &data.ip2);
+	if (ret)
+		return ret;
+
+	if (tb[IPSET_ATTR_PORT])
+		data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
+	else
+		return -IPSET_ERR_PROTOCOL;
+
+	if (tb[IPSET_ATTR_PROTO]) {
+		data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
+
+		if (data.proto == 0)
+			return -IPSET_ERR_INVALID_PROTO;
+	} else
+		return -IPSET_ERR_MISSING_PROTO;
+
+	switch (data.proto) {
+	case IPPROTO_UDP:
+	case IPPROTO_TCP:
+	case IPPROTO_ICMP:
+		break;
+	default:
+		data.port = 0;
+		break;
+	}
+
+	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 ||
+	    !(data.proto == IPPROTO_TCP || data.proto == IPPROTO_UDP) ||
+	    !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
+	      tb[IPSET_ATTR_PORT_TO])) {
+		ret = adtfn(set, &data, timeout);
+		return ip_set_eexist(ret, flags) ? 0 : ret;
+	}
+
+	ip = ntohl(data.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 > ip_to)
+			swap(ip, ip_to);
+	} else if (tb[IPSET_ATTR_CIDR]) {
+		u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
+
+		if (cidr > 32)
+			return -IPSET_ERR_INVALID_CIDR;
+		ip &= ip_set_hostmask(cidr);
+		ip_to = ip | ~ip_set_hostmask(cidr);
+	} else
+		ip_to = ip;
+
+	port = ntohs(data.port);
+	if (tb[IPSET_ATTR_PORT_TO]) {
+		port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
+		if (port > port_to)
+			swap(port, port_to);
+	} else
+		port_to = port;
+
+	for (; !before(ip_to, ip); ip++)
+		for (p = port; p <= port_to; p++) {
+			data.ip = htonl(ip);
+			data.port = htons(p);
+			ret = adtfn(set, &data, timeout);
+
+			if (ret && !ip_set_eexist(ret, flags))
+				return ret;
+			else
+				ret = 0;
+		}
+	return ret;
+}
+
+static bool
+hash_ipportip_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_ipportip6_elem {
+	union nf_inet_addr ip;
+	union nf_inet_addr ip2;
+	__be16 port;
+	u8 proto;
+	u8 padding;
+};
+
+struct hash_ipportip6_telem {
+	union nf_inet_addr ip;
+	union nf_inet_addr ip2;
+	__be16 port;
+	u8 proto;
+	u8 padding;
+	unsigned long timeout;
+};
+
+static inline bool
+hash_ipportip6_data_equal(const struct hash_ipportip6_elem *ip1,
+			  const struct hash_ipportip6_elem *ip2)
+{
+	return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 &&
+	       ipv6_addr_cmp(&ip1->ip2.in6, &ip2->ip2.in6) == 0 &&
+	       ip1->port == ip2->port &&
+	       ip1->proto == ip2->proto;
+}
+
+static inline bool
+hash_ipportip6_data_isnull(const struct hash_ipportip6_elem *elem)
+{
+	return elem->proto == 0;
+}
+
+static inline void
+hash_ipportip6_data_copy(struct hash_ipportip6_elem *dst,
+			 const struct hash_ipportip6_elem *src)
+{
+	memcpy(dst, src, sizeof(*dst));
+}
+
+static inline void
+hash_ipportip6_data_zero_out(struct hash_ipportip6_elem *elem)
+{
+	elem->proto = 0;
+}
+
+static bool
+hash_ipportip6_data_list(struct sk_buff *skb,
+			 const struct hash_ipportip6_elem *data)
+{
+	NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &data->ip);
+	NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP2, &data->ip2);
+	NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
+	NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
+	return 0;
+
+nla_put_failure:
+	return 1;
+}
+
+static bool
+hash_ipportip6_data_tlist(struct sk_buff *skb,
+			  const struct hash_ipportip6_elem *data)
+{
+	const struct hash_ipportip6_telem *e =
+		(const struct hash_ipportip6_telem *)data;
+
+	NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &e->ip);
+	NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP2, &data->ip2);
+	NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
+	NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
+	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 int
+hash_ipportip6_kadt(struct ip_set *set, const struct sk_buff *skb,
+		    enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
+{
+	const struct ip_set_hash *h = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	struct hash_ipportip6_elem data = { };
+
+	if (!ip_set_get_ip6_port(skb, flags & IPSET_DIM_TWO_SRC,
+				 &data.port, &data.proto))
+		return -EINVAL;
+
+	ip6addrptr(skb, flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
+	ip6addrptr(skb, flags & IPSET_DIM_THREE_SRC, &data.ip2.in6);
+
+	return adtfn(set, &data, h->timeout);
+}
+
+static int
+hash_ipportip6_uadt(struct ip_set *set, struct nlattr *tb[],
+		    enum ipset_adt adt, u32 *lineno, u32 flags)
+{
+	const struct ip_set_hash *h = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	struct hash_ipportip6_elem data = { };
+	u32 port, port_to;
+	u32 timeout = h->timeout;
+	int ret;
+
+	if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
+		     !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
+		     !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
+		     !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
+		     tb[IPSET_ATTR_IP_TO] ||
+		     tb[IPSET_ATTR_CIDR]))
+		return -IPSET_ERR_PROTOCOL;
+
+	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;
+
+	ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &data.ip2);
+	if (ret)
+		return ret;
+
+	if (tb[IPSET_ATTR_PORT])
+		data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
+	else
+		return -IPSET_ERR_PROTOCOL;
+
+	if (tb[IPSET_ATTR_PROTO]) {
+		data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
+
+		if (data.proto == 0)
+			return -IPSET_ERR_INVALID_PROTO;
+	} else
+		return -IPSET_ERR_MISSING_PROTO;
+
+	switch (data.proto) {
+	case IPPROTO_UDP:
+	case IPPROTO_TCP:
+	case IPPROTO_ICMPV6:
+		break;
+	default:
+		data.port = 0;
+		break;
+	}
+
+	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 ||
+	    !(data.proto == IPPROTO_TCP || data.proto == IPPROTO_UDP) ||
+	    !tb[IPSET_ATTR_PORT_TO]) {
+		ret = adtfn(set, &data, timeout);
+		return ip_set_eexist(ret, flags) ? 0 : ret;
+	}
+
+	port = ntohs(data.port);
+	port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
+	if (port > port_to)
+		swap(port, port_to);
+
+	for (; port <= port_to; port++) {
+		data.port = htons(port);
+		ret = adtfn(set, &data, timeout);
+
+		if (ret && !ip_set_eexist(ret, flags))
+			return ret;
+		else
+			ret = 0;
+	}
+	return ret;
+}
+
+/* Create hash:ip type of sets */
+
+static int
+hash_ipportip_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
+{
+	struct ip_set_hash *h;
+	u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
+	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), 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_ipportip4_tvariant : &hash_ipportip6_tvariant;
+
+		if (set->family == AF_INET)
+			hash_ipportip4_gc_init(set);
+		else
+			hash_ipportip6_gc_init(set);
+	} else {
+		set->variant = set->family == AF_INET
+			? &hash_ipportip4_variant : &hash_ipportip6_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_ipportip_type __read_mostly = {
+	.name		= "hash:ip,port,ip",
+	.protocol	= IPSET_PROTOCOL,
+	.features	= IPSET_TYPE_IP | IPSET_TYPE_PORT | IPSET_TYPE_IP2,
+	.dimension	= IPSET_DIM_THREE,
+	.family		= AF_UNSPEC,
+	.revision	= 0,
+	.create		= hash_ipportip_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_IP2]	= { .type = NLA_NESTED },
+		[IPSET_ATTR_PORT]	= { .type = NLA_U16 },
+		[IPSET_ATTR_PORT_TO]	= { .type = NLA_U16 },
+		[IPSET_ATTR_CIDR]	= { .type = NLA_U8 },
+		[IPSET_ATTR_PROTO]	= { .type = NLA_U8 },
+		[IPSET_ATTR_TIMEOUT]	= { .type = NLA_U32 },
+		[IPSET_ATTR_LINENO]	= { .type = NLA_U32 },
+	},
+	.me		= THIS_MODULE,
+};
+
+static int __init
+hash_ipportip_init(void)
+{
+	return ip_set_type_register(&hash_ipportip_type);
+}
+
+static void __exit
+hash_ipportip_fini(void)
+{
+	ip_set_type_unregister(&hash_ipportip_type);
+}
+
+module_init(hash_ipportip_init);
+module_exit(hash_ipportip_fini);

net/netfilter/ipset/ip_set_hash_ipportnet.c

···
+/* Copyright (C) 2003-2011 Jozsef Kadlecsik <[e-mail]>
+ *
+ * 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:ip,port,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 <net/tcp.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_getport.h>
+#include <linux/netfilter/ipset/ip_set_hash.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jozsef Kadlecsik <[e-mail]>");
+MODULE_DESCRIPTION("hash:ip,port,net type of IP sets");
+MODULE_ALIAS("ip_set_hash:ip,port,net");
+
+/* Type specific function prefix */
+#define TYPE		hash_ipportnet
+
+static bool
+hash_ipportnet_same_set(const struct ip_set *a, const struct ip_set *b);
+
+#define hash_ipportnet4_same_set	hash_ipportnet_same_set
+#define hash_ipportnet6_same_set	hash_ipportnet_same_set
+
+/* The type variant functions: IPv4 */
+
+/* Member elements without timeout */
+struct hash_ipportnet4_elem {
+	__be32 ip;
+	__be32 ip2;
+	__be16 port;
+	u8 cidr;
+	u8 proto;
+};
+
+/* Member elements with timeout support */
+struct hash_ipportnet4_telem {
+	__be32 ip;
+	__be32 ip2;
+	__be16 port;
+	u8 cidr;
+	u8 proto;
+	unsigned long timeout;
+};
+
+static inline bool
+hash_ipportnet4_data_equal(const struct hash_ipportnet4_elem *ip1,
+			   const struct hash_ipportnet4_elem *ip2)
+{
+	return ip1->ip == ip2->ip &&
+	       ip1->ip2 == ip2->ip2 &&
+	       ip1->cidr == ip2->cidr &&
+	       ip1->port == ip2->port &&
+	       ip1->proto == ip2->proto;
+}
+
+static inline bool
+hash_ipportnet4_data_isnull(const struct hash_ipportnet4_elem *elem)
+{
+	return elem->proto == 0;
+}
+
+static inline void
+hash_ipportnet4_data_copy(struct hash_ipportnet4_elem *dst,
+			  const struct hash_ipportnet4_elem *src)
+{
+	memcpy(dst, src, sizeof(*dst));
+}
+
+static inline void
+hash_ipportnet4_data_netmask(struct hash_ipportnet4_elem *elem, u8 cidr)
+{
+	elem->ip2 &= ip_set_netmask(cidr);
+	elem->cidr = cidr;
+}
+
+static inline void
+hash_ipportnet4_data_zero_out(struct hash_ipportnet4_elem *elem)
+{
+	elem->proto = 0;
+}
+
+static bool
+hash_ipportnet4_data_list(struct sk_buff *skb,
+			  const struct hash_ipportnet4_elem *data)
+{
+	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, data->ip);
+	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP2, data->ip2);
+	NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
+	NLA_PUT_U8(skb, IPSET_ATTR_CIDR2, data->cidr);
+	NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
+	return 0;
+
+nla_put_failure:
+	return 1;
+}
+
+static bool
+hash_ipportnet4_data_tlist(struct sk_buff *skb,
+			   const struct hash_ipportnet4_elem *data)
+{
+	const struct hash_ipportnet4_telem *tdata =
+		(const struct hash_ipportnet4_telem *)data;
+
+	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, tdata->ip);
+	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP2, tdata->ip2);
+	NLA_PUT_NET16(skb, IPSET_ATTR_PORT, tdata->port);
+	NLA_PUT_U8(skb, IPSET_ATTR_CIDR2, data->cidr);
+	NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
+	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_PROTO
+#define IP_SET_HASH_WITH_NETS
+
+#define PF		4
+#define HOST_MASK	32
+#include <linux/netfilter/ipset/ip_set_ahash.h>
+
+static int
+hash_ipportnet4_kadt(struct ip_set *set, const struct sk_buff *skb,
+		     enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
+{
+	const struct ip_set_hash *h = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	struct hash_ipportnet4_elem data =
+		{ .cidr = h->nets[0].cidr || HOST_MASK };
+
+	if (data.cidr == 0)
+		return -EINVAL;
+	if (adt == IPSET_TEST)
+		data.cidr = HOST_MASK;
+
+	if (!ip_set_get_ip4_port(skb, flags & IPSET_DIM_TWO_SRC,
+				 &data.port, &data.proto))
+		return -EINVAL;
+
+	ip4addrptr(skb, flags & IPSET_DIM_ONE_SRC, &data.ip);
+	ip4addrptr(skb, flags & IPSET_DIM_THREE_SRC, &data.ip2);
+	data.ip2 &= ip_set_netmask(data.cidr);
+
+	return adtfn(set, &data, h->timeout);
+}
+
+static int
+hash_ipportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
+		     enum ipset_adt adt, u32 *lineno, u32 flags)
+{
+	const struct ip_set_hash *h = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	struct hash_ipportnet4_elem data = { .cidr = HOST_MASK };
+	u32 ip, ip_to, p, port, port_to;
+	u32 timeout = h->timeout;
+	int ret;
+
+	if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
+		     !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
+		     !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
+		     !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_ipaddr4(tb[IPSET_ATTR_IP], &data.ip);
+	if (ret)
+		return ret;
+
+	ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP2], &data.ip2);
+	if (ret)
+		return ret;
+
+	if (tb[IPSET_ATTR_CIDR2])
+		data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
+
+	if (!data.cidr)
+		return -IPSET_ERR_INVALID_CIDR;
+
+	data.ip2 &= ip_set_netmask(data.cidr);
+
+	if (tb[IPSET_ATTR_PORT])
+		data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
+	else
+		return -IPSET_ERR_PROTOCOL;
+
+	if (tb[IPSET_ATTR_PROTO]) {
+		data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
+
+		if (data.proto == 0)
+			return -IPSET_ERR_INVALID_PROTO;
+	} else
+		return -IPSET_ERR_MISSING_PROTO;
+
+	switch (data.proto) {
+	case IPPROTO_UDP:
+	case IPPROTO_TCP:
+	case IPPROTO_ICMP:
+		break;
+	default:
+		data.port = 0;
+		break;
+	}
+
+	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 ||
+	    !(data.proto == IPPROTO_TCP || data.proto == IPPROTO_UDP) ||
+	    !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
+	      tb[IPSET_ATTR_PORT_TO])) {
+		ret = adtfn(set, &data, timeout);
+		return ip_set_eexist(ret, flags) ? 0 : ret;
+	}
+
+	ip = ntohl(data.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 > ip_to)
+			swap(ip, ip_to);
+	} else if (tb[IPSET_ATTR_CIDR]) {
+		u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
+
+		if (cidr > 32)
+			return -IPSET_ERR_INVALID_CIDR;
+		ip &= ip_set_hostmask(cidr);
+		ip_to = ip | ~ip_set_hostmask(cidr);
+	} else
+		ip_to = ip;
+
+	port = ntohs(data.port);
+	if (tb[IPSET_ATTR_PORT_TO]) {
+		port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
+		if (port > port_to)
+			swap(port, port_to);
+	} else
+		port_to = port;
+
+	for (; !before(ip_to, ip); ip++)
+		for (p = port; p <= port_to; p++) {
+			data.ip = htonl(ip);
+			data.port = htons(p);
+			ret = adtfn(set, &data, timeout);
+
+			if (ret && !ip_set_eexist(ret, flags))
+				return ret;
+			else
+				ret = 0;
+		}
+	return ret;
+}
+
+static bool
+hash_ipportnet_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_ipportnet6_elem {
+	union nf_inet_addr ip;
+	union nf_inet_addr ip2;
+	__be16 port;
+	u8 cidr;
+	u8 proto;
+};
+
+struct hash_ipportnet6_telem {
+	union nf_inet_addr ip;
+	union nf_inet_addr ip2;
+	__be16 port;
+	u8 cidr;
+	u8 proto;
+	unsigned long timeout;
+};
+
+static inline bool
+hash_ipportnet6_data_equal(const struct hash_ipportnet6_elem *ip1,
+			   const struct hash_ipportnet6_elem *ip2)
+{
+	return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 &&
+	       ipv6_addr_cmp(&ip1->ip2.in6, &ip2->ip2.in6) == 0 &&
+	       ip1->cidr == ip2->cidr &&
+	       ip1->port == ip2->port &&
+	       ip1->proto == ip2->proto;
+}
+
+static inline bool
+hash_ipportnet6_data_isnull(const struct hash_ipportnet6_elem *elem)
+{
+	return elem->proto == 0;
+}
+
+static inline void
+hash_ipportnet6_data_copy(struct hash_ipportnet6_elem *dst,
+			  const struct hash_ipportnet6_elem *src)
+{
+	memcpy(dst, src, sizeof(*dst));
+}
+
+static inline void
+hash_ipportnet6_data_zero_out(struct hash_ipportnet6_elem *elem)
+{
+	elem->proto = 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_ipportnet6_data_netmask(struct hash_ipportnet6_elem *elem, u8 cidr)
+{
+	ip6_netmask(&elem->ip2, cidr);
+	elem->cidr = cidr;
+}
+
+static bool
+hash_ipportnet6_data_list(struct sk_buff *skb,
+			  const struct hash_ipportnet6_elem *data)
+{
+	NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &data->ip);
+	NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP2, &data->ip2);
+	NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
+	NLA_PUT_U8(skb, IPSET_ATTR_CIDR2, data->cidr);
+	NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
+	return 0;
+
+nla_put_failure:
+	return 1;
+}
+
+static bool
+hash_ipportnet6_data_tlist(struct sk_buff *skb,
+			   const struct hash_ipportnet6_elem *data)
+{
+	const struct hash_ipportnet6_telem *e =
+		(const struct hash_ipportnet6_telem *)data;
+
+	NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &e->ip);
+	NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP2, &data->ip2);
+	NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
+	NLA_PUT_U8(skb, IPSET_ATTR_CIDR2, data->cidr);
+	NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
+	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 int
+hash_ipportnet6_kadt(struct ip_set *set, const struct sk_buff *skb,
+		     enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
+{
+	const struct ip_set_hash *h = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	struct hash_ipportnet6_elem data =
+		{ .cidr = h->nets[0].cidr || HOST_MASK };
+
+	if (data.cidr == 0)
+		return -EINVAL;
+	if (adt == IPSET_TEST)
+		data.cidr = HOST_MASK;
+
+	if (!ip_set_get_ip6_port(skb, flags & IPSET_DIM_TWO_SRC,
+				 &data.port, &data.proto))
+		return -EINVAL;
+
+	ip6addrptr(skb, flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
+	ip6addrptr(skb, flags & IPSET_DIM_THREE_SRC, &data.ip2.in6);
+	ip6_netmask(&data.ip2, data.cidr);
+
+	return adtfn(set, &data, h->timeout);
+}
+
+static int
+hash_ipportnet6_uadt(struct ip_set *set, struct nlattr *tb[],
+		     enum ipset_adt adt, u32 *lineno, u32 flags)
+{
+	const struct ip_set_hash *h = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	struct hash_ipportnet6_elem data = { .cidr = HOST_MASK };
+	u32 port, port_to;
+	u32 timeout = h->timeout;
+	int ret;
+
+	if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
+		     !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
+		     !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
+		     !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
+		     tb[IPSET_ATTR_IP_TO] ||
+		     tb[IPSET_ATTR_CIDR]))
+		return -IPSET_ERR_PROTOCOL;
+
+	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;
+
+	ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &data.ip2);
+	if (ret)
+		return ret;
+
+	if (tb[IPSET_ATTR_CIDR2])
+		data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
+
+	if (!data.cidr)
+		return -IPSET_ERR_INVALID_CIDR;
+
+	ip6_netmask(&data.ip2, data.cidr);
+
+	if (tb[IPSET_ATTR_PORT])
+		data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
+	else
+		return -IPSET_ERR_PROTOCOL;
+
+	if (tb[IPSET_ATTR_PROTO]) {
+		data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
+
+		if (data.proto == 0)
+			return -IPSET_ERR_INVALID_PROTO;
+	} else
+		return -IPSET_ERR_MISSING_PROTO;
+
+	switch (data.proto) {
+	case IPPROTO_UDP:
+	case IPPROTO_TCP:
+	case IPPROTO_ICMPV6:
+		break;
+	default:
+		data.port = 0;
+		break;
+	}
+
+	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 ||
+	    !(data.proto == IPPROTO_TCP || data.proto == IPPROTO_UDP) ||
+	    !tb[IPSET_ATTR_PORT_TO]) {
+		ret = adtfn(set, &data, timeout);
+		return ip_set_eexist(ret, flags) ? 0 : ret;
+	}
+
+	port = ntohs(data.port);
+	port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
+	if (port > port_to)
+		swap(port, port_to);
+
+	for (; port <= port_to; port++) {
+		data.port = htons(port);
+		ret = adtfn(set, &data, timeout);
+
+		if (ret && !ip_set_eexist(ret, flags))
+			return ret;
+		else
+			ret = 0;
+	}
+	return ret;
+}
+
+/* Create hash:ip type of sets */
+
+static int
+hash_ipportnet_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
+{
+	struct ip_set_hash *h;
+	u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
+	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_ipportnet4_tvariant
+			: &hash_ipportnet6_tvariant;
+
+		if (set->family == AF_INET)
+			hash_ipportnet4_gc_init(set);
+		else
+			hash_ipportnet6_gc_init(set);
+	} else {
+		set->variant = set->family == AF_INET
+			? &hash_ipportnet4_variant : &hash_ipportnet6_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_ipportnet_type __read_mostly = {
+	.name		= "hash:ip,port,net",
+	.protocol	= IPSET_PROTOCOL,
+	.features	= IPSET_TYPE_IP | IPSET_TYPE_PORT | IPSET_TYPE_IP2,
+	.dimension	= IPSET_DIM_THREE,
+	.family		= AF_UNSPEC,
+	.revision	= 0,
+	.create		= hash_ipportnet_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_IP2]	= { .type = NLA_NESTED },
+		[IPSET_ATTR_PORT]	= { .type = NLA_U16 },
+		[IPSET_ATTR_PORT_TO]	= { .type = NLA_U16 },
+		[IPSET_ATTR_CIDR]	= { .type = NLA_U8 },
+		[IPSET_ATTR_CIDR2]	= { .type = NLA_U8 },
+		[IPSET_ATTR_PROTO]	= { .type = NLA_U8 },
+		[IPSET_ATTR_TIMEOUT]	= { .type = NLA_U32 },
+		[IPSET_ATTR_LINENO]	= { .type = NLA_U32 },
+	},
+	.me		= THIS_MODULE,
+};
+
+static int __init
+hash_ipportnet_init(void)
+{
+	return ip_set_type_register(&hash_ipportnet_type);
+}
+
+static void __exit
+hash_ipportnet_fini(void)
+{
+	ip_set_type_unregister(&hash_ipportnet_type);
+}
+
+module_init(hash_ipportnet_init);
+module_exit(hash_ipportnet_fini);

net/netfilter/ipset/ip_set_hash_net.c

···
+/* Copyright (C) 2003-2011 Jozsef Kadlecsik <[e-mail]>
+ *
+ * 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 <[e-mail]>");
+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)
+{
+	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 int
+hash_net4_kadt(struct ip_set *set, const struct sk_buff *skb,
+	       enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
+{
+	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 || HOST_MASK };
+
+	if (data.cidr == 0)
+		return -EINVAL;
+	if (adt == IPSET_TEST)
+		data.cidr = HOST_MASK;
+
+	ip4addrptr(skb, flags & IPSET_DIM_ONE_SRC, &data.ip);
+	data.ip &= ip_set_netmask(data.cidr);
+
+	return adtfn(set, &data, h->timeout);
+}
+
+static int
+hash_net4_uadt(struct ip_set *set, struct nlattr *tb[],
+	       enum ipset_adt adt, u32 *lineno, u32 flags)
+{
+	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;
+	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_ipaddr4(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;
+
+	data.ip &= ip_set_netmask(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);
+
+	return ip_set_eexist(ret, flags) ? 0 : 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)
+{
+	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)
+{
+	ipv6_addr_copy(&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 int
+hash_net6_kadt(struct ip_set *set, const struct sk_buff *skb,
+	       enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
+{
+	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 || HOST_MASK };
+
+	if (data.cidr == 0)
+		return -EINVAL;
+	if (adt == IPSET_TEST)
+		data.cidr = HOST_MASK;
+
+	ip6addrptr(skb, flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
+	ip6_netmask(&data.ip, data.cidr);
+
+	return adtfn(set, &data, h->timeout);
+}
+
+static int
+hash_net6_uadt(struct ip_set *set, struct nlattr *tb[],
+	       enum ipset_adt adt, u32 *lineno, u32 flags)
+{
+	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 (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);
+
+	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	= 0,
+	.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_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);

net/netfilter/ipset/ip_set_hash_netport.c

···
+/* Copyright (C) 2003-2011 Jozsef Kadlecsik <[e-mail]>
+ *
+ * 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,port 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_getport.h>
+#include <linux/netfilter/ipset/ip_set_hash.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jozsef Kadlecsik <[e-mail]>");
+MODULE_DESCRIPTION("hash:net,port type of IP sets");
+MODULE_ALIAS("ip_set_hash:net,port");
+
+/* Type specific function prefix */
+#define TYPE		hash_netport
+
+static bool
+hash_netport_same_set(const struct ip_set *a, const struct ip_set *b);
+
+#define hash_netport4_same_set	hash_netport_same_set
+#define hash_netport6_same_set	hash_netport_same_set
+
+/* The type variant functions: IPv4 */
+
+/* Member elements without timeout */
+struct hash_netport4_elem {
+	__be32 ip;
+	__be16 port;
+	u8 proto;
+	u8 cidr;
+};
+
+/* Member elements with timeout support */
+struct hash_netport4_telem {
+	__be32 ip;
+	__be16 port;
+	u8 proto;
+	u8 cidr;
+	unsigned long timeout;
+};
+
+static inline bool
+hash_netport4_data_equal(const struct hash_netport4_elem *ip1,
+			 const struct hash_netport4_elem *ip2)
+{
+	return ip1->ip == ip2->ip &&
+	       ip1->port == ip2->port &&
+	       ip1->proto == ip2->proto &&
+	       ip1->cidr == ip2->cidr;
+}
+
+static inline bool
+hash_netport4_data_isnull(const struct hash_netport4_elem *elem)
+{
+	return elem->proto == 0;
+}
+
+static inline void
+hash_netport4_data_copy(struct hash_netport4_elem *dst,
+			const struct hash_netport4_elem *src)
+{
+	dst->ip = src->ip;
+	dst->port = src->port;
+	dst->proto = src->proto;
+	dst->cidr = src->cidr;
+}
+
+static inline void
+hash_netport4_data_netmask(struct hash_netport4_elem *elem, u8 cidr)
+{
+	elem->ip &= ip_set_netmask(cidr);
+	elem->cidr = cidr;
+}
+
+static inline void
+hash_netport4_data_zero_out(struct hash_netport4_elem *elem)
+{
+	elem->proto = 0;
+}
+
+static bool
+hash_netport4_data_list(struct sk_buff *skb,
+			const struct hash_netport4_elem *data)
+{
+	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, data->ip);
+	NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
+	NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr);
+	NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
+	return 0;
+
+nla_put_failure:
+	return 1;
+}
+
+static bool
+hash_netport4_data_tlist(struct sk_buff *skb,
+			 const struct hash_netport4_elem *data)
+{
+	const struct hash_netport4_telem *tdata =
+		(const struct hash_netport4_telem *)data;
+
+	NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, tdata->ip);
+	NLA_PUT_NET16(skb, IPSET_ATTR_PORT, tdata->port);
+	NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr);
+	NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
+	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_PROTO
+#define IP_SET_HASH_WITH_NETS
+
+#define PF		4
+#define HOST_MASK	32
+#include <linux/netfilter/ipset/ip_set_ahash.h>
+
+static int
+hash_netport4_kadt(struct ip_set *set, const struct sk_buff *skb,
+		   enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
+{
+	const struct ip_set_hash *h = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	struct hash_netport4_elem data = {
+		.cidr = h->nets[0].cidr || HOST_MASK };
+
+	if (data.cidr == 0)
+		return -EINVAL;
+	if (adt == IPSET_TEST)
+		data.cidr = HOST_MASK;
+
+	if (!ip_set_get_ip4_port(skb, flags & IPSET_DIM_TWO_SRC,
+				 &data.port, &data.proto))
+		return -EINVAL;
+
+	ip4addrptr(skb, flags & IPSET_DIM_ONE_SRC, &data.ip);
+	data.ip &= ip_set_netmask(data.cidr);
+
+	return adtfn(set, &data, h->timeout);
+}
+
+static int
+hash_netport4_uadt(struct ip_set *set, struct nlattr *tb[],
+		   enum ipset_adt adt, u32 *lineno, u32 flags)
+{
+	const struct ip_set_hash *h = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	struct hash_netport4_elem data = { .cidr = HOST_MASK };
+	u32 port, port_to;
+	u32 timeout = h->timeout;
+	int ret;
+
+	if (unlikely(!tb[IPSET_ATTR_IP] ||
+		     !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
+		     !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
+		     !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_ipaddr4(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;
+	data.ip &= ip_set_netmask(data.cidr);
+
+	if (tb[IPSET_ATTR_PORT])
+		data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
+	else
+		return -IPSET_ERR_PROTOCOL;
+
+	if (tb[IPSET_ATTR_PROTO]) {
+		data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
+
+		if (data.proto == 0)
+			return -IPSET_ERR_INVALID_PROTO;
+	} else
+		return -IPSET_ERR_MISSING_PROTO;
+
+	switch (data.proto) {
+	case IPPROTO_UDP:
+	case IPPROTO_TCP:
+	case IPPROTO_ICMP:
+		break;
+	default:
+		data.port = 0;
+		break;
+	}
+
+	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 ||
+	    !(data.proto == IPPROTO_TCP || data.proto == IPPROTO_UDP) ||
+	    !tb[IPSET_ATTR_PORT_TO]) {
+		ret = adtfn(set, &data, timeout);
+		return ip_set_eexist(ret, flags) ? 0 : ret;
+	}
+
+	port = ntohs(data.port);
+	port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
+	if (port > port_to)
+		swap(port, port_to);
+
+	for (; port <= port_to; port++) {
+		data.port = htons(port);
+		ret = adtfn(set, &data, timeout);
+
+		if (ret && !ip_set_eexist(ret, flags))
+			return ret;
+		else
+			ret = 0;
+	}
+	return ret;
+}
+
+static bool
+hash_netport_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_netport6_elem {
+	union nf_inet_addr ip;
+	__be16 port;
+	u8 proto;
+	u8 cidr;
+};
+
+struct hash_netport6_telem {
+	union nf_inet_addr ip;
+	__be16 port;
+	u8 proto;
+	u8 cidr;
+	unsigned long timeout;
+};
+
+static inline bool
+hash_netport6_data_equal(const struct hash_netport6_elem *ip1,
+			 const struct hash_netport6_elem *ip2)
+{
+	return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 &&
+	       ip1->port == ip2->port &&
+	       ip1->proto == ip2->proto &&
+	       ip1->cidr == ip2->cidr;
+}
+
+static inline bool
+hash_netport6_data_isnull(const struct hash_netport6_elem *elem)
+{
+	return elem->proto == 0;
+}
+
+static inline void
+hash_netport6_data_copy(struct hash_netport6_elem *dst,
+			const struct hash_netport6_elem *src)
+{
+	memcpy(dst, src, sizeof(*dst));
+}
+
+static inline void
+hash_netport6_data_zero_out(struct hash_netport6_elem *elem)
+{
+	elem->proto = 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_netport6_data_netmask(struct hash_netport6_elem *elem, u8 cidr)
+{
+	ip6_netmask(&elem->ip, cidr);
+	elem->cidr = cidr;
+}
+
+static bool
+hash_netport6_data_list(struct sk_buff *skb,
+			const struct hash_netport6_elem *data)
+{
+	NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &data->ip);
+	NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
+	NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr);
+	NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
+	return 0;
+
+nla_put_failure:
+	return 1;
+}
+
+static bool
+hash_netport6_data_tlist(struct sk_buff *skb,
+			 const struct hash_netport6_elem *data)
+{
+	const struct hash_netport6_telem *e =
+		(const struct hash_netport6_telem *)data;
+
+	NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &e->ip);
+	NLA_PUT_NET16(skb, IPSET_ATTR_PORT, data->port);
+	NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr);
+	NLA_PUT_U8(skb, IPSET_ATTR_PROTO, data->proto);
+	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 int
+hash_netport6_kadt(struct ip_set *set, const struct sk_buff *skb,
+		   enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
+{
+	const struct ip_set_hash *h = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	struct hash_netport6_elem data = {
+		.cidr = h->nets[0].cidr || HOST_MASK };
+
+	if (data.cidr == 0)
+		return -EINVAL;
+	if (adt == IPSET_TEST)
+		data.cidr = HOST_MASK;
+
+	if (!ip_set_get_ip6_port(skb, flags & IPSET_DIM_TWO_SRC,
+				 &data.port, &data.proto))
+		return -EINVAL;
+
+	ip6addrptr(skb, flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
+	ip6_netmask(&data.ip, data.cidr);
+
+	return adtfn(set, &data, h->timeout);
+}
+
+static int
+hash_netport6_uadt(struct ip_set *set, struct nlattr *tb[],
+		   enum ipset_adt adt, u32 *lineno, u32 flags)
+{
+	const struct ip_set_hash *h = set->data;
+	ipset_adtfn adtfn = set->variant->adt[adt];
+	struct hash_netport6_elem data = { .cidr = HOST_MASK };
+	u32 port, port_to;
+	u32 timeout = h->timeout;
+	int ret;
+
+	if (unlikely(!tb[IPSET_ATTR_IP] ||
+		     !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
+		     !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
+		     !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_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_PORT])
+		data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
+	else
+		return -IPSET_ERR_PROTOCOL;
+
+	if (tb[IPSET_ATTR_PROTO]) {
+		data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
+
+		if (data.proto == 0)
+			return -IPSET_ERR_INVALID_PROTO;
+	} else
+		return -IPSET_ERR_MISSING_PROTO;
+
+	switch (data.proto) {
+	case IPPROTO_UDP:
+	case IPPROTO_TCP:
+	case IPPROTO_ICMPV6:
+		break;
+	default:
+		data.port = 0;
+		break;
+	}
+
+	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 ||
+	    !(data.proto == IPPROTO_TCP || data.proto == IPPROTO_UDP) ||
+	    !tb[IPSET_ATTR_PORT_TO]) {
+		ret = adtfn(set, &data, timeout);
+		return ip_set_eexist(ret, flags) ? 0 : ret;
+	}
+
+	port = ntohs(data.port);
+	port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
+	if (port > port_to)
+		swap(port, port_to);
+
+	for (; port <= port_to; port++) {
+		data.port = htons(port);
+		ret = adtfn(set, &data, timeout);
+
+		if (ret && !ip_set_eexist(ret, flags))
+			return ret;
+		else
+			ret = 0;
+	}
+	return ret;
+}
+
+/* Create hash:ip type of sets */
+
+static int
+hash_netport_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
+{
+	struct ip_set_hash *h;
+	u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
+	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_netport4_tvariant : &hash_netport6_tvariant;
+
+		if (set->family == AF_INET)
+			hash_netport4_gc_init(set);
+		else
+			hash_netport6_gc_init(set);
+	} else {
+		set->variant = set->family == AF_INET
+			? &hash_netport4_variant : &hash_netport6_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_netport_type __read_mostly = {
+	.name		= "hash:net,port",
+	.protocol	= IPSET_PROTOCOL,
+	.features	= IPSET_TYPE_IP | IPSET_TYPE_PORT,
+	.dimension	= IPSET_DIM_TWO,
+	.family		= AF_UNSPEC,
+	.revision	= 0,
+	.create		= hash_netport_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_PROTO]	= { .type = NLA_U8 },
+		[IPSET_ATTR_TIMEOUT]	= { .type = NLA_U32 },
+	},
+	.adt_policy	= {
+		[IPSET_ATTR_IP]		= { .type = NLA_NESTED },
+		[IPSET_ATTR_PORT]	= { .type = NLA_U16 },
+		[IPSET_ATTR_PORT_TO]	= { .type = NLA_U16 },
+		[IPSET_ATTR_PROTO]	= { .type = NLA_U8 },
+		[IPSET_ATTR_CIDR]	= { .type = NLA_U8 },
+		[IPSET_ATTR_TIMEOUT]	= { .type = NLA_U32 },
+		[IPSET_ATTR_LINENO]	= { .type = NLA_U32 },
+	},
+	.me		= THIS_MODULE,
+};
+
+static int __init
+hash_netport_init(void)
+{
+	return ip_set_type_register(&hash_netport_type);
+}
+
+static void __exit
+hash_netport_fini(void)
+{
+	ip_set_type_unregister(&hash_netport_type);
+}
+
+module_init(hash_netport_init);
+module_exit(hash_netport_fini);

net/netfilter/ipset/ip_set_list_set.c

···
+/* Copyright (C) 2008-2011 Jozsef Kadlecsik <[e-mail]>
+ *
+ * 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 list:set type */
+
+#include <linux/module.h>
+#include <linux/ip.h>
+#include <linux/skbuff.h>
+#include <linux/errno.h>
+
+#include <linux/netfilter/ipset/ip_set.h>
+#include <linux/netfilter/ipset/ip_set_timeout.h>
+#include <linux/netfilter/ipset/ip_set_list.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jozsef Kadlecsik <[e-mail]>");
+MODULE_DESCRIPTION("list:set type of IP sets");
+MODULE_ALIAS("ip_set_list:set");
+
+/* Member elements without and with timeout */
+struct set_elem {
+	ip_set_id_t id;
+};
+
+struct set_telem {
+	ip_set_id_t id;
+	unsigned long timeout;
+};
+
+/* Type structure */
+struct list_set {
+	size_t dsize;		/* element size */
+	u32 size;		/* size of set list array */
+	u32 timeout;		/* timeout value */
+	struct timer_list gc;	/* garbage collection */
+	struct set_elem members[0]; /* the set members */
+};
+
+static inline struct set_elem *
+list_set_elem(const struct list_set *map, u32 id)
+{
+	return (struct set_elem *)((char *)map->members + id * map->dsize);
+}
+
+static inline bool
+list_set_timeout(const struct list_set *map, u32 id)
+{
+	const struct set_telem *elem =
+		(const struct set_telem *) list_set_elem(map, id);
+
+	return ip_set_timeout_test(elem->timeout);
+}
+
+static inline bool
+list_set_expired(const struct list_set *map, u32 id)
+{
+	const struct set_telem *elem =
+		(const struct set_telem *) list_set_elem(map, id);
+
+	return ip_set_timeout_expired(elem->timeout);
+}
+
+static inline int
+list_set_exist(const struct set_telem *elem)
+{
+	return elem->id != IPSET_INVALID_ID &&
+	       !ip_set_timeout_expired(elem->timeout);
+}
+
+/* Set list without and with timeout */
+
+static int
+list_set_kadt(struct ip_set *set, const struct sk_buff *skb,
+	      enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
+{
+	struct list_set *map = set->data;
+	struct set_elem *elem;
+	u32 i;
+	int ret;
+
+	for (i = 0; i < map->size; i++) {
+		elem = list_set_elem(map, i);
+		if (elem->id == IPSET_INVALID_ID)
+			return 0;
+		if (with_timeout(map->timeout) && list_set_expired(map, i))
+			continue;
+		switch (adt) {
+		case IPSET_TEST:
+			ret = ip_set_test(elem->id, skb, pf, dim, flags);
+			if (ret > 0)
+				return ret;
+			break;
+		case IPSET_ADD:
+			ret = ip_set_add(elem->id, skb, pf, dim, flags);
+			if (ret == 0)
+				return ret;
+			break;
+		case IPSET_DEL:
+			ret = ip_set_del(elem->id, skb, pf, dim, flags);
+			if (ret == 0)
+				return ret;
+			break;
+		default:
+			break;
+		}
+	}
+	return -EINVAL;
+}
+
+static bool
+next_id_eq(const struct list_set *map, u32 i, ip_set_id_t id)
+{
+	const struct set_elem *elem;
+
+	if (i + 1 < map->size) {
+		elem = list_set_elem(map, i + 1);
+		return !!(elem->id == id &&
+			  !(with_timeout(map->timeout) &&
+			    list_set_expired(map, i + 1)));
+	}
+
+	return 0;
+}
+
+static void
+list_elem_add(struct list_set *map, u32 i, ip_set_id_t id)
+{
+	struct set_elem *e;
+
+	for (; i < map->size; i++) {
+		e = list_set_elem(map, i);
+		swap(e->id, id);
+		if (e->id == IPSET_INVALID_ID)
+			break;
+	}
+}
+
+static void
+list_elem_tadd(struct list_set *map, u32 i, ip_set_id_t id,
+	       unsigned long timeout)
+{
+	struct set_telem *e;
+
+	for (; i < map->size; i++) {
+		e = (struct set_telem *)list_set_elem(map, i);
+		swap(e->id, id);
+		if (e->id == IPSET_INVALID_ID)
+			break;
+		swap(e->timeout, timeout);
+	}
+}
+
+static int
+list_set_add(struct list_set *map, u32 i, ip_set_id_t id,
+	     unsigned long timeout)
+{
+	const struct set_elem *e = list_set_elem(map, i);
+
+	if (i == map->size - 1 && e->id != IPSET_INVALID_ID)
+		/* Last element replaced: e.g. add new,before,last */
+		ip_set_put_byindex(e->id);
+	if (with_timeout(map->timeout))
+		list_elem_tadd(map, i, id, timeout);
+	else
+		list_elem_add(map, i, id);
+
+	return 0;
+}
+
+static int
+list_set_del(struct list_set *map, ip_set_id_t id, u32 i)
+{
+	struct set_elem *a = list_set_elem(map, i), *b;
+
+	ip_set_put_byindex(id);
+
+	for (; i < map->size - 1; i++) {
+		b = list_set_elem(map, i + 1);
+		a->id = b->id;
+		if (with_timeout(map->timeout))
+			((struct set_telem *)a)->timeout =
+				((struct set_telem *)b)->timeout;
+		a = b;
+		if (a->id == IPSET_INVALID_ID)
+			break;
+	}
+	/* Last element */
+	a->id = IPSET_INVALID_ID;
+	return 0;
+}
+
+static int
+list_set_uadt(struct ip_set *set, struct nlattr *tb[],
+	      enum ipset_adt adt, u32 *lineno, u32 flags)
+{
+	struct list_set *map = set->data;
+	bool with_timeout = with_timeout(map->timeout);
+	int before = 0;
+	u32 timeout = map->timeout;
+	ip_set_id_t id, refid = IPSET_INVALID_ID;
+	const struct set_elem *elem;
+	struct ip_set *s;
+	u32 i;
+	int ret = 0;
+
+	if (unlikely(!tb[IPSET_ATTR_NAME] ||
+		     !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
+		     !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
+		return -IPSET_ERR_PROTOCOL;
+
+	if (tb[IPSET_ATTR_LINENO])
+		*lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
+
+	id = ip_set_get_byname(nla_data(tb[IPSET_ATTR_NAME]), &s);
+	if (id == IPSET_INVALID_ID)
+		return -IPSET_ERR_NAME;
+	/* "Loop detection" */
+	if (s->type->features & IPSET_TYPE_NAME) {
+		ret = -IPSET_ERR_LOOP;
+		goto finish;
+	}
+
+	if (tb[IPSET_ATTR_CADT_FLAGS]) {
+		u32 f = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
+		before = f & IPSET_FLAG_BEFORE;
+	}
+
+	if (before && !tb[IPSET_ATTR_NAMEREF]) {
+		ret = -IPSET_ERR_BEFORE;
+		goto finish;
+	}
+
+	if (tb[IPSET_ATTR_NAMEREF]) {
+		refid = ip_set_get_byname(nla_data(tb[IPSET_ATTR_NAMEREF]),
+					  &s);
+		if (refid == IPSET_INVALID_ID) {
+			ret = -IPSET_ERR_NAMEREF;
+			goto finish;
+		}
+		if (!before)
+			before = -1;
+	}
+	if (tb[IPSET_ATTR_TIMEOUT]) {
+		if (!with_timeout) {
+			ret = -IPSET_ERR_TIMEOUT;
+			goto finish;
+		}
+		timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
+	}
+
+	switch (adt) {
+	case IPSET_TEST:
+		for (i = 0; i < map->size && !ret; i++) {
+			elem = list_set_elem(map, i);
+			if (elem->id == IPSET_INVALID_ID ||
+			    (before != 0 && i + 1 >= map->size))
+				break;
+			else if (with_timeout && list_set_expired(map, i))
+				continue;
+			else if (before > 0 && elem->id == id)
+				ret = next_id_eq(map, i, refid);
+			else if (before < 0 && elem->id == refid)
+				ret = next_id_eq(map, i, id);
+			else if (before == 0 && elem->id == id)
+				ret = 1;
+		}
+		break;
+	case IPSET_ADD:
+		for (i = 0; i < map->size && !ret; i++) {
+			elem = list_set_elem(map, i);
+			if (elem->id == id &&
+			    !(with_timeout && list_set_expired(map, i)))
+				ret = -IPSET_ERR_EXIST;
+		}
+		if (ret == -IPSET_ERR_EXIST)
+			break;
+		ret = -IPSET_ERR_LIST_FULL;
+		for (i = 0; i < map->size && ret == -IPSET_ERR_LIST_FULL; i++) {
+			elem = list_set_elem(map, i);
+			if (elem->id == IPSET_INVALID_ID)
+				ret = before != 0 ? -IPSET_ERR_REF_EXIST
+					: list_set_add(map, i, id, timeout);
+			else if (elem->id != refid)
+				continue;
+			else if (with_timeout && list_set_expired(map, i))
+				ret = -IPSET_ERR_REF_EXIST;
+			else if (before)
+				ret = list_set_add(map, i, id, timeout);
+			else if (i + 1 < map->size)
+				ret = list_set_add(map, i + 1, id, timeout);
+		}
+		break;
+	case IPSET_DEL:
+		ret = -IPSET_ERR_EXIST;
+		for (i = 0; i < map->size && ret == -IPSET_ERR_EXIST; i++) {
+			elem = list_set_elem(map, i);
+			if (elem->id == IPSET_INVALID_ID) {
+				ret = before != 0 ? -IPSET_ERR_REF_EXIST
+						  : -IPSET_ERR_EXIST;
+				break;
+			} else if (with_timeout && list_set_expired(map, i))
+				continue;
+			else if (elem->id == id &&
+				 (before == 0 ||
+				  (before > 0 &&
+				   next_id_eq(map, i, refid))))
+				ret = list_set_del(map, id, i);
+			else if (before < 0 &&
+				 elem->id == refid &&
+				 next_id_eq(map, i, id))
+				ret = list_set_del(map, id, i + 1);
+		}
+		break;
+	default:
+		break;
+	}
+
+finish:
+	if (refid != IPSET_INVALID_ID)
+		ip_set_put_byindex(refid);
+	if (adt != IPSET_ADD || ret)
+		ip_set_put_byindex(id);
+
+	return ip_set_eexist(ret, flags) ? 0 : ret;
+}
+
+static void
+list_set_flush(struct ip_set *set)
+{
+	struct list_set *map = set->data;
+	struct set_elem *elem;
+	u32 i;
+
+	for (i = 0; i < map->size; i++) {
+		elem = list_set_elem(map, i);
+		if (elem->id != IPSET_INVALID_ID) {
+			ip_set_put_byindex(elem->id);
+			elem->id = IPSET_INVALID_ID;
+		}
+	}
+}
+
+static void
+list_set_destroy(struct ip_set *set)
+{
+	struct list_set *map = set->data;
+
+	if (with_timeout(map->timeout))
+		del_timer_sync(&map->gc);
+	list_set_flush(set);
+	kfree(map);
+
+	set->data = NULL;
+}
+
+static int
+list_set_head(struct ip_set *set, struct sk_buff *skb)
+{
+	const struct list_set *map = set->data;
+	struct nlattr *nested;
+
+	nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
+	if (!nested)
+		goto nla_put_failure;
+	NLA_PUT_NET32(skb, IPSET_ATTR_SIZE, htonl(map->size));
+	if (with_timeout(map->timeout))
+		NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT, htonl(map->timeout));
+	NLA_PUT_NET32(skb, IPSET_ATTR_REFERENCES,
+		      htonl(atomic_read(&set->ref) - 1));
+	NLA_PUT_NET32(skb, IPSET_ATTR_MEMSIZE,
+		      htonl(sizeof(*map) + map->size * map->dsize));
+	ipset_nest_end(skb, nested);
+
+	return 0;
+nla_put_failure:
+	return -EMSGSIZE;
+}
+
+static int
+list_set_list(const struct ip_set *set,
+	      struct sk_buff *skb, struct netlink_callback *cb)
+{
+	const struct list_set *map = set->data;
+	struct nlattr *atd, *nested;
+	u32 i, first = cb->args[2];
+	const struct set_elem *e;
+
+	atd = ipset_nest_start(skb, IPSET_ATTR_ADT);
+	if (!atd)
+		return -EMSGSIZE;
+	for (; cb->args[2] < map->size; cb->args[2]++) {
+		i = cb->args[2];
+		e = list_set_elem(map, i);
+		if (e->id == IPSET_INVALID_ID)
+			goto finish;
+		if (with_timeout(map->timeout) && list_set_expired(map, i))
+			continue;
+		nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
+		if (!nested) {
+			if (i == first) {
+				nla_nest_cancel(skb, atd);
+				return -EMSGSIZE;
+			} else
+				goto nla_put_failure;
+		}
+		NLA_PUT_STRING(skb, IPSET_ATTR_NAME,
+			       ip_set_name_byindex(e->id));
+		if (with_timeout(map->timeout)) {
+			const struct set_telem *te =
+				(const struct set_telem *) e;
+			NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
+				      htonl(ip_set_timeout_get(te->timeout)));
+		}
+		ipset_nest_end(skb, nested);
+	}
+finish:
+	ipset_nest_end(skb, atd);
+	/* Set listing finished */
+	cb->args[2] = 0;
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(skb, nested);
+	ipset_nest_end(skb, atd);
+	if (unlikely(i == first)) {
+		cb->args[2] = 0;
+		return -EMSGSIZE;
+	}
+	return 0;
+}
+
+static bool
+list_set_same_set(const struct ip_set *a, const struct ip_set *b)
+{
+	const struct list_set *x = a->data;
+	const struct list_set *y = b->data;
+
+	return x->size == y->size &&
+	       x->timeout == y->timeout;
+}
+
+static const struct ip_set_type_variant list_set = {
+	.kadt	= list_set_kadt,
+	.uadt	= list_set_uadt,
+	.destroy = list_set_destroy,
+	.flush	= list_set_flush,
+	.head	= list_set_head,
+	.list	= list_set_list,
+	.same_set = list_set_same_set,
+};
+
+static void
+list_set_gc(unsigned long ul_set)
+{
+	struct ip_set *set = (struct ip_set *) ul_set;
+	struct list_set *map = set->data;
+	struct set_telem *e;
+	u32 i;
+
+	/* We run parallel with other readers (test element)
+	 * but adding/deleting new entries is locked out */
+	read_lock_bh(&set->lock);
+	for (i = map->size - 1; i >= 0; i--) {
+		e = (struct set_telem *) list_set_elem(map, i);
+		if (e->id != IPSET_INVALID_ID &&
+		    list_set_expired(map, i))
+			list_set_del(map, e->id, i);
+	}
+	read_unlock_bh(&set->lock);
+
+	map->gc.expires = jiffies + IPSET_GC_PERIOD(map->timeout) * HZ;
+	add_timer(&map->gc);
+}
+
+static void
+list_set_gc_init(struct ip_set *set)
+{
+	struct list_set *map = set->data;
+
+	init_timer(&map->gc);
+	map->gc.data = (unsigned long) set;
+	map->gc.function = list_set_gc;
+	map->gc.expires = jiffies + IPSET_GC_PERIOD(map->timeout) * HZ;
+	add_timer(&map->gc);
+}
+
+/* Create list:set type of sets */
+
+static bool
+init_list_set(struct ip_set *set, u32 size, size_t dsize,
+	      unsigned long timeout)
+{
+	struct list_set *map;
+	struct set_elem *e;
+	u32 i;
+
+	map = kzalloc(sizeof(*map) + size * dsize, GFP_KERNEL);
+	if (!map)
+		return false;
+
+	map->size = size;
+	map->dsize = dsize;
+	map->timeout = timeout;
+	set->data = map;
+
+	for (i = 0; i < size; i++) {
+		e = list_set_elem(map, i);
+		e->id = IPSET_INVALID_ID;
+	}
+
+	return true;
+}
+
+static int
+list_set_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
+{
+	u32 size = IP_SET_LIST_DEFAULT_SIZE;
+
+	if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_SIZE) ||
+		     !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
+		return -IPSET_ERR_PROTOCOL;
+
+	if (tb[IPSET_ATTR_SIZE])
+		size = ip_set_get_h32(tb[IPSET_ATTR_SIZE]);
+	if (size < IP_SET_LIST_MIN_SIZE)
+		size = IP_SET_LIST_MIN_SIZE;
+
+	if (tb[IPSET_ATTR_TIMEOUT]) {
+		if (!init_list_set(set, size, sizeof(struct set_telem),
+				   ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT])))
+			return -ENOMEM;
+
+		list_set_gc_init(set);
+	} else {
+		if (!init_list_set(set, size, sizeof(struct set_elem),
+				   IPSET_NO_TIMEOUT))
+			return -ENOMEM;
+	}
+	set->variant = &list_set;
+	return 0;
+}
+
+static struct ip_set_type list_set_type __read_mostly = {
+	.name		= "list:set",
+	.protocol	= IPSET_PROTOCOL,
+	.features	= IPSET_TYPE_NAME | IPSET_DUMP_LAST,
+	.dimension	= IPSET_DIM_ONE,
+	.family		= AF_UNSPEC,
+	.revision	= 0,
+	.create		= list_set_create,
+	.create_policy	= {
+		[IPSET_ATTR_SIZE]	= { .type = NLA_U32 },
+		[IPSET_ATTR_TIMEOUT]	= { .type = NLA_U32 },
+	},
+	.adt_policy	= {
+		[IPSET_ATTR_NAME]	= { .type = NLA_STRING,
+					    .len = IPSET_MAXNAMELEN },
+		[IPSET_ATTR_NAMEREF]	= { .type = NLA_STRING,
+					    .len = IPSET_MAXNAMELEN },
+		[IPSET_ATTR_TIMEOUT]	= { .type = NLA_U32 },
+		[IPSET_ATTR_LINENO]	= { .type = NLA_U32 },
+		[IPSET_ATTR_CADT_FLAGS]	= { .type = NLA_U32 },
+	},
+	.me		= THIS_MODULE,
+};
+
+static int __init
+list_set_init(void)
+{
+	return ip_set_type_register(&list_set_type);
+}
+
+static void __exit
+list_set_fini(void)
+{
+	ip_set_type_unregister(&list_set_type);
+}
+
+module_init(list_set_init);
+module_exit(list_set_fini);

net/netfilter/ipset/pfxlen.c

···
+#include <linux/netfilter/ipset/pfxlen.h>
+
+/*
+ * Prefixlen maps for fast conversions, by Jan Engelhardt.
+ */
+
+#define E(a, b, c, d) \
+	{.ip6 = { \
+		__constant_htonl(a), __constant_htonl(b), \
+		__constant_htonl(c), __constant_htonl(d), \
+	} }
+
+/*
+ * This table works for both IPv4 and IPv6;
+ * just use prefixlen_netmask_map[prefixlength].ip.
+ */
+const union nf_inet_addr ip_set_netmask_map[] = {
+	E(0x00000000, 0x00000000, 0x00000000, 0x00000000),
+	E(0x80000000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xC0000000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xE0000000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xF0000000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xF8000000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFC000000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFE000000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFF000000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFF800000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFC00000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFE00000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFF00000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFF80000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFC0000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFE0000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFF0000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFF8000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFC000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFE000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFF000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFF800, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFC00, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFE00, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFF00, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFF80, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFC0, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFE0, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFF0, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFF8, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFC, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFE, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0x80000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xC0000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xE0000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xF0000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xF8000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFC000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFE000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFF000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFF800000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFC00000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFE00000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFF00000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFF80000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFC0000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFE0000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFF0000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFF8000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFC000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFE000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFF000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFF800, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFC00, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFE00, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFF00, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFF80, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFC0, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFE0, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFF0, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFF8, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFC, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFE, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0x80000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xC0000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xE0000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xF0000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xF8000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFC000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFE000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFF000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFF800000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFC00000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFE00000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFF00000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFF80000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFC0000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFE0000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFF0000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFF8000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFC000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFE000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFF000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFF800, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFC00, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFE00, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFF00, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFF80, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFC0, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFE0, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFF0, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFF8, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFC, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFE, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x80000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xC0000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xE0000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xF0000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xF8000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFC000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFE000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFF000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFF800000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFC00000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFE00000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFF00000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFF80000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFC0000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFE0000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFF0000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFF8000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFC000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFE000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFF000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFF800),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFC00),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFE00),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFF00),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFF80),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFC0),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFE0),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFF0),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFF8),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFC),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFE),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF),
+};
+EXPORT_SYMBOL_GPL(ip_set_netmask_map);
+
+#undef  E
+#define E(a, b, c, d) 						\
+	{.ip6 = { (__force __be32) a, (__force __be32) b,	\
+		  (__force __be32) c, (__force __be32) d,	\
+	} }
+
+/*
+ * This table works for both IPv4 and IPv6;
+ * just use prefixlen_hostmask_map[prefixlength].ip.
+ */
+const union nf_inet_addr ip_set_hostmask_map[] = {
+	E(0x00000000, 0x00000000, 0x00000000, 0x00000000),
+	E(0x80000000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xC0000000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xE0000000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xF0000000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xF8000000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFC000000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFE000000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFF000000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFF800000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFC00000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFE00000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFF00000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFF80000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFC0000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFE0000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFF0000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFF8000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFC000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFE000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFF000, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFF800, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFC00, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFE00, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFF00, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFF80, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFC0, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFE0, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFF0, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFF8, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFC, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFE, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0x00000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0x80000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xC0000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xE0000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xF0000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xF8000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFC000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFE000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFF000000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFF800000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFC00000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFE00000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFF00000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFF80000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFC0000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFE0000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFF0000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFF8000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFC000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFE000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFF000, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFF800, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFC00, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFE00, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFF00, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFF80, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFC0, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFE0, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFF0, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFF8, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFC, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFE, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0x80000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xC0000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xE0000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xF0000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xF8000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFC000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFE000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFF000000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFF800000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFC00000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFE00000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFF00000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFF80000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFC0000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFE0000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFF0000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFF8000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFC000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFE000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFF000, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFF800, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFC00, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFE00, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFF00, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFF80, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFC0, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFE0, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFF0, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFF8, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFC, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFE, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x80000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xC0000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xE0000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xF0000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xF8000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFC000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFE000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFF000000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFF800000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFC00000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFE00000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFF00000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFF80000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFC0000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFE0000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFF0000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFF8000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFC000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFE000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFF000),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFF800),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFC00),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFE00),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFF00),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFF80),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFC0),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFE0),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFF0),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFF8),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFC),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFE),
+	E(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF),
+};
+EXPORT_SYMBOL_GPL(ip_set_hostmask_map);

net/netfilter/ipvs/ip_vs_core.c

···
 	ipvs->gen = atomic_read(&ipvs_netns_cnt);
 	atomic_inc(&ipvs_netns_cnt);
 	net->ipvs = ipvs;
-	printk(KERN_INFO "IPVS: Creating netns size=%lu id=%d\n",
+	printk(KERN_INFO "IPVS: Creating netns size=%zu id=%d\n",
 			 sizeof(struct netns_ipvs), ipvs->gen);
 	return 0;
 }

net/netfilter/ipvs/ip_vs_ctl.c

···
 	}
 	spin_lock_init(&ipvs->tot_stats->lock);
 
-	for (idx = 0; idx < IP_VS_RTAB_SIZE; idx++)
-		INIT_LIST_HEAD(&ipvs->rs_table[idx]);
-
 	proc_net_fops_create(net, "ip_vs", 0, &ip_vs_info_fops);
 	proc_net_fops_create(net, "ip_vs_stats", 0, &ip_vs_stats_fops);
 	proc_net_fops_create(net, "ip_vs_stats_percpu", 0,
···
 	tbl[idx++].data = &ipvs->sysctl_nat_icmp_send;
 
 
+#ifdef CONFIG_SYSCTL
 	ipvs->sysctl_hdr = register_net_sysctl_table(net, net_vs_ctl_path,
 						     tbl);
-	if (ipvs->sysctl_hdr == NULL)
-		goto err_reg;
+	if (ipvs->sysctl_hdr == NULL) {
+		if (!net_eq(net, &init_net))
+			kfree(tbl);
+		goto err_dup;
+	}
+#endif
 	ip_vs_new_estimator(net, ipvs->tot_stats);
 	ipvs->sysctl_tbl = tbl;
 	/* Schedule defense work */
···
 	schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
 	return 0;
 
-err_reg:
-	if (!net_eq(net, &init_net))
-		kfree(tbl);
 err_dup:
 	free_percpu(ipvs->cpustats);
 err_alloc:
···
 	ip_vs_kill_estimator(net, ipvs->tot_stats);
 	cancel_delayed_work_sync(&ipvs->defense_work);
 	cancel_work_sync(&ipvs->defense_work.work);
+#ifdef CONFIG_SYSCTL
 	unregister_net_sysctl_table(ipvs->sysctl_hdr);
+#endif
 	proc_net_remove(net, "ip_vs_stats_percpu");
 	proc_net_remove(net, "ip_vs_stats");
 	proc_net_remove(net, "ip_vs");

net/netfilter/ipvs/ip_vs_lblc.c

···
 						sizeof(vs_vars_table),
 						GFP_KERNEL);
 		if (ipvs->lblc_ctl_table == NULL)
-			goto err_dup;
+			return -ENOMEM;
 	} else
 		ipvs->lblc_ctl_table = vs_vars_table;
 	ipvs->sysctl_lblc_expiration = 24*60*60*HZ;
 	ipvs->lblc_ctl_table[0].data = &ipvs->sysctl_lblc_expiration;
 
+#ifdef CONFIG_SYSCTL
 	ipvs->lblc_ctl_header =
 		register_net_sysctl_table(net, net_vs_ctl_path,
 					  ipvs->lblc_ctl_table);
-	if (!ipvs->lblc_ctl_header)
-		goto err_reg;
+	if (!ipvs->lblc_ctl_header) {
+		if (!net_eq(net, &init_net))
+			kfree(ipvs->lblc_ctl_table);
+		return -ENOMEM;
+	}
+#endif
 
 	return 0;
-
-err_reg:
-	if (!net_eq(net, &init_net))
-		kfree(ipvs->lblc_ctl_table);
-
-err_dup:
-	return -ENOMEM;
 }
 
 static void __net_exit __ip_vs_lblc_exit(struct net *net)
 {
 	struct netns_ipvs *ipvs = net_ipvs(net);
 
+#ifdef CONFIG_SYSCTL
 	unregister_net_sysctl_table(ipvs->lblc_ctl_header);
+#endif
 
 	if (!net_eq(net, &init_net))
 		kfree(ipvs->lblc_ctl_table);

net/netfilter/ipvs/ip_vs_lblcr.c

···
 						sizeof(vs_vars_table),
 						GFP_KERNEL);
 		if (ipvs->lblcr_ctl_table == NULL)
-			goto err_dup;
+			return -ENOMEM;
 	} else
 		ipvs->lblcr_ctl_table = vs_vars_table;
 	ipvs->sysctl_lblcr_expiration = 24*60*60*HZ;
 	ipvs->lblcr_ctl_table[0].data = &ipvs->sysctl_lblcr_expiration;
 
+#ifdef CONFIG_SYSCTL
 	ipvs->lblcr_ctl_header =
 		register_net_sysctl_table(net, net_vs_ctl_path,
 					  ipvs->lblcr_ctl_table);
-	if (!ipvs->lblcr_ctl_header)
-		goto err_reg;
+	if (!ipvs->lblcr_ctl_header) {
+		if (!net_eq(net, &init_net))
+			kfree(ipvs->lblcr_ctl_table);
+		return -ENOMEM;
+	}
+#endif
 
 	return 0;
-
-err_reg:
-	if (!net_eq(net, &init_net))
-		kfree(ipvs->lblcr_ctl_table);
-
-err_dup:
-	return -ENOMEM;
 }
 
 static void __net_exit __ip_vs_lblcr_exit(struct net *net)
 {
 	struct netns_ipvs *ipvs = net_ipvs(net);
 
+#ifdef CONFIG_SYSCTL
 	unregister_net_sysctl_table(ipvs->lblcr_ctl_header);
+#endif
 
 	if (!net_eq(net, &init_net))
 		kfree(ipvs->lblcr_ctl_table);

net/netfilter/ipvs/ip_vs_sync.c

···
 	return register_pernet_subsys(&ipvs_sync_ops);
 }
 
-void __exit ip_vs_sync_cleanup(void)
+void ip_vs_sync_cleanup(void)
 {
 	unregister_pernet_subsys(&ipvs_sync_ops);
 }

net/netfilter/nf_conntrack_netlink.c

···
 static int
 ctnetlink_parse_tuple(const struct nlattr * const cda[],
 		      struct nf_conntrack_tuple *tuple,
-		      enum ctattr_tuple type, u_int8_t l3num)
+		      enum ctattr_type type, u_int8_t l3num)
 {
 	struct nlattr *tb[CTA_TUPLE_MAX+1];
 	int err;

net/netfilter/xt_devgroup.c

···
+/*
+ * Copyright (c) 2011 Patrick McHardy <[e-mail]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+
+#include <linux/netfilter/xt_devgroup.h>
+#include <linux/netfilter/x_tables.h>
+
+MODULE_AUTHOR("Patrick McHardy <[e-mail]>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Xtables: Device group match");
+MODULE_ALIAS("ipt_devgroup");
+MODULE_ALIAS("ip6t_devgroup");
+
+static bool devgroup_mt(const struct sk_buff *skb, struct xt_action_param *par)
+{
+	const struct xt_devgroup_info *info = par->matchinfo;
+
+	if (info->flags & XT_DEVGROUP_MATCH_SRC &&
+	    (((info->src_group ^ par->in->group) & info->src_mask ? 1 : 0) ^
+	     ((info->flags & XT_DEVGROUP_INVERT_SRC) ? 1 : 0)))
+		return false;
+
+	if (info->flags & XT_DEVGROUP_MATCH_DST &&
+	    (((info->dst_group ^ par->out->group) & info->dst_mask ? 1 : 0) ^
+	     ((info->flags & XT_DEVGROUP_INVERT_DST) ? 1 : 0)))
+		return false;
+
+	return true;
+}
+
+static int devgroup_mt_checkentry(const struct xt_mtchk_param *par)
+{
+	const struct xt_devgroup_info *info = par->matchinfo;
+
+	if (info->flags & ~(XT_DEVGROUP_MATCH_SRC | XT_DEVGROUP_INVERT_SRC |
+			    XT_DEVGROUP_MATCH_DST | XT_DEVGROUP_INVERT_DST))
+		return -EINVAL;
+
+	if (info->flags & XT_DEVGROUP_MATCH_SRC &&
+	    par->hook_mask & ~((1 << NF_INET_PRE_ROUTING) |
+			       (1 << NF_INET_LOCAL_IN) |
+			       (1 << NF_INET_FORWARD)))
+		return -EINVAL;
+
+	if (info->flags & XT_DEVGROUP_MATCH_DST &&
+	    par->hook_mask & ~((1 << NF_INET_FORWARD) |
+			       (1 << NF_INET_LOCAL_OUT) |
+			       (1 << NF_INET_POST_ROUTING)))
+		return -EINVAL;
+
+	return 0;
+}
+
+static struct xt_match devgroup_mt_reg __read_mostly = {
+	.name		= "devgroup",
+	.match		= devgroup_mt,
+	.checkentry	= devgroup_mt_checkentry,
+	.matchsize	= sizeof(struct xt_devgroup_info),
+	.family		= NFPROTO_UNSPEC,
+	.me		= THIS_MODULE
+};
+
+static int __init devgroup_mt_init(void)
+{
+	return xt_register_match(&devgroup_mt_reg);
+}
+
+static void __exit devgroup_mt_exit(void)
+{
+	xt_unregister_match(&devgroup_mt_reg);
+}
+
+module_init(devgroup_mt_init);
+module_exit(devgroup_mt_exit);

net/netfilter/xt_set.c

···
+/* Copyright (C) 2000-2002 Joakim Axelsson <[e-mail]>
+ *                         Patrick Schaaf <[e-mail]>
+ *                         Martin Josefsson <[e-mail]>
+ * Copyright (C) 2003-2011 Jozsef Kadlecsik <[e-mail]>
+ *
+ * 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 which implements the set match and SET target
+ * for netfilter/iptables. */
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/version.h>
+
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter/xt_set.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jozsef Kadlecsik <[e-mail]>");
+MODULE_DESCRIPTION("Xtables: IP set match and target module");
+MODULE_ALIAS("xt_SET");
+MODULE_ALIAS("ipt_set");
+MODULE_ALIAS("ip6t_set");
+MODULE_ALIAS("ipt_SET");
+MODULE_ALIAS("ip6t_SET");
+
+static inline int
+match_set(ip_set_id_t index, const struct sk_buff *skb,
+	  u8 pf, u8 dim, u8 flags, int inv)
+{
+	if (ip_set_test(index, skb, pf, dim, flags))
+		inv = !inv;
+	return inv;
+}
+
+/* Revision 0 interface: backward compatible with netfilter/iptables */
+
+static bool
+set_match_v0(const struct sk_buff *skb, struct xt_action_param *par)
+{
+	const struct xt_set_info_match_v0 *info = par->matchinfo;
+
+	return match_set(info->match_set.index, skb, par->family,
+			 info->match_set.u.compat.dim,
+			 info->match_set.u.compat.flags,
+			 info->match_set.u.compat.flags & IPSET_INV_MATCH);
+}
+
+static void
+compat_flags(struct xt_set_info_v0 *info)
+{
+	u_int8_t i;
+
+	/* Fill out compatibility data according to enum ip_set_kopt */
+	info->u.compat.dim = IPSET_DIM_ZERO;
+	if (info->u.flags[0] & IPSET_MATCH_INV)
+		info->u.compat.flags |= IPSET_INV_MATCH;
+	for (i = 0; i < IPSET_DIM_MAX-1 && info->u.flags[i]; i++) {
+		info->u.compat.dim++;
+		if (info->u.flags[i] & IPSET_SRC)
+			info->u.compat.flags |= (1<<info->u.compat.dim);
+	}
+}
+
+static int
+set_match_v0_checkentry(const struct xt_mtchk_param *par)
+{
+	struct xt_set_info_match_v0 *info = par->matchinfo;
+	ip_set_id_t index;
+
+	index = ip_set_nfnl_get_byindex(info->match_set.index);
+
+	if (index == IPSET_INVALID_ID) {
+		pr_warning("Cannot find set indentified by id %u to match\n",
+			   info->match_set.index);
+		return -ENOENT;
+	}
+	if (info->match_set.u.flags[IPSET_DIM_MAX-1] != 0) {
+		pr_warning("Protocol error: set match dimension "
+			   "is over the limit!\n");
+		return -ERANGE;
+	}
+
+	/* Fill out compatibility data */
+	compat_flags(&info->match_set);
+
+	return 0;
+}
+
+static void
+set_match_v0_destroy(const struct xt_mtdtor_param *par)
+{
+	struct xt_set_info_match_v0 *info = par->matchinfo;
+
+	ip_set_nfnl_put(info->match_set.index);
+}
+
+static unsigned int
+set_target_v0(struct sk_buff *skb, const struct xt_action_param *par)
+{
+	const struct xt_set_info_target_v0 *info = par->targinfo;
+
+	if (info->add_set.index != IPSET_INVALID_ID)
+		ip_set_add(info->add_set.index, skb, par->family,
+			   info->add_set.u.compat.dim,
+			   info->add_set.u.compat.flags);
+	if (info->del_set.index != IPSET_INVALID_ID)
+		ip_set_del(info->del_set.index, skb, par->family,
+			   info->del_set.u.compat.dim,
+			   info->del_set.u.compat.flags);
+
+	return XT_CONTINUE;
+}
+
+static int
+set_target_v0_checkentry(const struct xt_tgchk_param *par)
+{
+	struct xt_set_info_target_v0 *info = par->targinfo;
+	ip_set_id_t index;
+
+	if (info->add_set.index != IPSET_INVALID_ID) {
+		index = ip_set_nfnl_get_byindex(info->add_set.index);
+		if (index == IPSET_INVALID_ID) {
+			pr_warning("Cannot find add_set index %u as target\n",
+				   info->add_set.index);
+			return -ENOENT;
+		}
+	}
+
+	if (info->del_set.index != IPSET_INVALID_ID) {
+		index = ip_set_nfnl_get_byindex(info->del_set.index);
+		if (index == IPSET_INVALID_ID) {
+			pr_warning("Cannot find del_set index %u as target\n",
+				   info->del_set.index);
+			return -ENOENT;
+		}
+	}
+	if (info->add_set.u.flags[IPSET_DIM_MAX-1] != 0 ||
+	    info->del_set.u.flags[IPSET_DIM_MAX-1] != 0) {
+		pr_warning("Protocol error: SET target dimension "
+			   "is over the limit!\n");
+		return -ERANGE;
+	}
+
+	/* Fill out compatibility data */
+	compat_flags(&info->add_set);
+	compat_flags(&info->del_set);
+
+	return 0;
+}
+
+static void
+set_target_v0_destroy(const struct xt_tgdtor_param *par)
+{
+	const struct xt_set_info_target_v0 *info = par->targinfo;
+
+	if (info->add_set.index != IPSET_INVALID_ID)
+		ip_set_nfnl_put(info->add_set.index);
+	if (info->del_set.index != IPSET_INVALID_ID)
+		ip_set_nfnl_put(info->del_set.index);
+}
+
+/* Revision 1: current interface to netfilter/iptables */
+
+static bool
+set_match(const struct sk_buff *skb, struct xt_action_param *par)
+{
+	const struct xt_set_info_match *info = par->matchinfo;
+
+	return match_set(info->match_set.index, skb, par->family,
+			 info->match_set.dim,
+			 info->match_set.flags,
+			 info->match_set.flags & IPSET_INV_MATCH);
+}
+
+static int
+set_match_checkentry(const struct xt_mtchk_param *par)
+{
+	struct xt_set_info_match *info = par->matchinfo;
+	ip_set_id_t index;
+
+	index = ip_set_nfnl_get_byindex(info->match_set.index);
+
+	if (index == IPSET_INVALID_ID) {
+		pr_warning("Cannot find set indentified by id %u to match\n",
+			   info->match_set.index);
+		return -ENOENT;
+	}
+	if (info->match_set.dim > IPSET_DIM_MAX) {
+		pr_warning("Protocol error: set match dimension "
+			   "is over the limit!\n");
+		return -ERANGE;
+	}
+
+	return 0;
+}
+
+static void
+set_match_destroy(const struct xt_mtdtor_param *par)
+{
+	struct xt_set_info_match *info = par->matchinfo;
+
+	ip_set_nfnl_put(info->match_set.index);
+}
+
+static unsigned int
+set_target(struct sk_buff *skb, const struct xt_action_param *par)
+{
+	const struct xt_set_info_target *info = par->targinfo;
+
+	if (info->add_set.index != IPSET_INVALID_ID)
+		ip_set_add(info->add_set.index,
+			   skb, par->family,
+			   info->add_set.dim,
+			   info->add_set.flags);
+	if (info->del_set.index != IPSET_INVALID_ID)
+		ip_set_del(info->del_set.index,
+			   skb, par->family,
+			   info->add_set.dim,
+			   info->del_set.flags);
+
+	return XT_CONTINUE;
+}
+
+static int
+set_target_checkentry(const struct xt_tgchk_param *par)
+{
+	const struct xt_set_info_target *info = par->targinfo;
+	ip_set_id_t index;
+
+	if (info->add_set.index != IPSET_INVALID_ID) {
+		index = ip_set_nfnl_get_byindex(info->add_set.index);
+		if (index == IPSET_INVALID_ID) {
+			pr_warning("Cannot find add_set index %u as target\n",
+				   info->add_set.index);
+			return -ENOENT;
+		}
+	}
+
+	if (info->del_set.index != IPSET_INVALID_ID) {
+		index = ip_set_nfnl_get_byindex(info->del_set.index);
+		if (index == IPSET_INVALID_ID) {
+			pr_warning("Cannot find del_set index %u as target\n",
+				   info->del_set.index);
+			return -ENOENT;
+		}
+	}
+	if (info->add_set.dim > IPSET_DIM_MAX ||
+	    info->del_set.flags > IPSET_DIM_MAX) {
+		pr_warning("Protocol error: SET target dimension "
+			   "is over the limit!\n");
+		return -ERANGE;
+	}
+
+	return 0;
+}
+
+static void
+set_target_destroy(const struct xt_tgdtor_param *par)
+{
+	const struct xt_set_info_target *info = par->targinfo;
+
+	if (info->add_set.index != IPSET_INVALID_ID)
+		ip_set_nfnl_put(info->add_set.index);
+	if (info->del_set.index != IPSET_INVALID_ID)
+		ip_set_nfnl_put(info->del_set.index);
+}
+
+static struct xt_match set_matches[] __read_mostly = {
+	{
+		.name		= "set",
+		.family		= NFPROTO_IPV4,
+		.revision	= 0,
+		.match		= set_match_v0,
+		.matchsize	= sizeof(struct xt_set_info_match_v0),
+		.checkentry	= set_match_v0_checkentry,
+		.destroy	= set_match_v0_destroy,
+		.me		= THIS_MODULE
+	},
+	{
+		.name		= "set",
+		.family		= NFPROTO_IPV4,
+		.revision	= 1,
+		.match		= set_match,
+		.matchsize	= sizeof(struct xt_set_info_match),
+		.checkentry	= set_match_checkentry,
+		.destroy	= set_match_destroy,
+		.me		= THIS_MODULE
+	},
+	{
+		.name		= "set",
+		.family		= NFPROTO_IPV6,
+		.revision	= 1,
+		.match		= set_match,
+		.matchsize	= sizeof(struct xt_set_info_match),
+		.checkentry	= set_match_checkentry,
+		.destroy	= set_match_destroy,
+		.me		= THIS_MODULE
+	},
+};
+
+static struct xt_target set_targets[] __read_mostly = {
+	{
+		.name		= "SET",
+		.revision	= 0,
+		.family		= NFPROTO_IPV4,
+		.target		= set_target_v0,
+		.targetsize	= sizeof(struct xt_set_info_target_v0),
+		.checkentry	= set_target_v0_checkentry,
+		.destroy	= set_target_v0_destroy,
+		.me		= THIS_MODULE
+	},
+	{
+		.name		= "SET",
+		.revision	= 1,
+		.family		= NFPROTO_IPV4,
+		.target		= set_target,
+		.targetsize	= sizeof(struct xt_set_info_target),
+		.checkentry	= set_target_checkentry,
+		.destroy	= set_target_destroy,
+		.me		= THIS_MODULE
+	},
+	{
+		.name		= "SET",
+		.revision	= 1,
+		.family		= NFPROTO_IPV6,
+		.target		= set_target,
+		.targetsize	= sizeof(struct xt_set_info_target),
+		.checkentry	= set_target_checkentry,
+		.destroy	= set_target_destroy,
+		.me		= THIS_MODULE
+	},
+};
+
+static int __init xt_set_init(void)
+{
+	int ret = xt_register_matches(set_matches, ARRAY_SIZE(set_matches));
+
+	if (!ret) {
+		ret = xt_register_targets(set_targets,
+					  ARRAY_SIZE(set_targets));
+		if (ret)
+			xt_unregister_matches(set_matches,
+					      ARRAY_SIZE(set_matches));
+	}
+	return ret;
+}
+
+static void __exit xt_set_fini(void)
+{
+	xt_unregister_matches(set_matches, ARRAY_SIZE(set_matches));
+	xt_unregister_targets(set_targets, ARRAY_SIZE(set_targets));
+}
+
+module_init(xt_set_init);
+module_exit(xt_set_fini);