linux/net/netfilter/ipset/ip_set_hash_net.c

// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (C) 2003-2013 Jozsef Kadlecsik <[email protected]> */

/* 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_hash.h>

#define IPSET_TYPE_REV_MIN …
/*				1    Range as input support for IPv4 added */
/*				2    nomatch flag support added */
/*				3    Counters support added */
/*				4    Comments support added */
/*				5    Forceadd support added */
/*				6    skbinfo support added */
#define IPSET_TYPE_REV_MAX …

MODULE_LICENSE(…) …;
MODULE_AUTHOR(…) …;
IP_SET_MODULE_DESC(…) …;
MODULE_ALIAS(…) …;

/* Type specific function prefix */
#define HTYPE …
#define IP_SET_HASH_WITH_NETS

/* IPv4 variant */

/* Member elements  */
struct hash_net4_elem { … };

/* Common functions */

static bool
hash_net4_data_equal(const struct hash_net4_elem *ip1,
		     const struct hash_net4_elem *ip2,
		     u32 *multi)
{ … }

static int
hash_net4_do_data_match(const struct hash_net4_elem *elem)
{ … }

static void
hash_net4_data_set_flags(struct hash_net4_elem *elem, u32 flags)
{ … }

static void
hash_net4_data_reset_flags(struct hash_net4_elem *elem, u8 *flags)
{ … }

static void
hash_net4_data_netmask(struct hash_net4_elem *elem, u8 cidr)
{ … }

static bool
hash_net4_data_list(struct sk_buff *skb, const struct hash_net4_elem *data)
{ … }

static void
hash_net4_data_next(struct hash_net4_elem *next,
		    const struct hash_net4_elem *d)
{ … }

#define MTYPE …
#define HOST_MASK …
#include "ip_set_hash_gen.h"

static int
hash_net4_kadt(struct ip_set *set, const struct sk_buff *skb,
	       const struct xt_action_param *par,
	       enum ipset_adt adt, struct ip_set_adt_opt *opt)
{ … }

static int
hash_net4_uadt(struct ip_set *set, struct nlattr *tb[],
	       enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
{ … }

/* IPv6 variant */

struct hash_net6_elem { … };

/* Common functions */

static bool
hash_net6_data_equal(const struct hash_net6_elem *ip1,
		     const struct hash_net6_elem *ip2,
		     u32 *multi)
{ … }

static int
hash_net6_do_data_match(const struct hash_net6_elem *elem)
{ … }

static void
hash_net6_data_set_flags(struct hash_net6_elem *elem, u32 flags)
{ … }

static void
hash_net6_data_reset_flags(struct hash_net6_elem *elem, u8 *flags)
{ … }

static void
hash_net6_data_netmask(struct hash_net6_elem *elem, u8 cidr)
{ … }

static bool
hash_net6_data_list(struct sk_buff *skb, const struct hash_net6_elem *data)
{ … }

static void
hash_net6_data_next(struct hash_net6_elem *next,
		    const struct hash_net6_elem *d)
{ … }

#undef MTYPE
#undef HOST_MASK

#define MTYPE …
#define HOST_MASK …
#define IP_SET_EMIT_CREATE
#include "ip_set_hash_gen.h"

static int
hash_net6_kadt(struct ip_set *set, const struct sk_buff *skb,
	       const struct xt_action_param *par,
	       enum ipset_adt adt, struct ip_set_adt_opt *opt)
{ … }

static int
hash_net6_uadt(struct ip_set *set, struct nlattr *tb[],
	       enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
{ … }

static struct ip_set_type hash_net_type __read_mostly = …;

static int __init
hash_net_init(void)
{ … }

static void __exit
hash_net_fini(void)
{ … }

module_init(…) …;
module_exit(hash_net_fini);