linux/net/netfilter/ipset/ip_set_hash_ip.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: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_hash.h>

#define IPSET_TYPE_REV_MIN …
/*				1	   Counters support */
/*				2	   Comments support */
/*				3	   Forceadd support */
/*				4	   skbinfo support */
/*				5	   bucketsize, initval support  */
#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_NETMASK
#define IP_SET_HASH_WITH_BITMASK

/* IPv4 variant */

/* Member elements */
struct hash_ip4_elem { … };

/* Common functions */

static bool
hash_ip4_data_equal(const struct hash_ip4_elem *e1,
		    const struct hash_ip4_elem *e2,
		    u32 *multi)
{ … }

static bool
hash_ip4_data_list(struct sk_buff *skb, const struct hash_ip4_elem *e)
{ … }

static void
hash_ip4_data_next(struct hash_ip4_elem *next, const struct hash_ip4_elem *e)
{ … }

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

static int
hash_ip4_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_ip4_uadt(struct ip_set *set, struct nlattr *tb[],
	      enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
{ … }

/* IPv6 variant */

/* Member elements */
struct hash_ip6_elem { … };

/* Common functions */

static bool
hash_ip6_data_equal(const struct hash_ip6_elem *ip1,
		    const struct hash_ip6_elem *ip2,
		    u32 *multi)
{ … }

static bool
hash_ip6_data_list(struct sk_buff *skb, const struct hash_ip6_elem *e)
{ … }

static void
hash_ip6_data_next(struct hash_ip6_elem *next, const struct hash_ip6_elem *e)
{ … }

#undef MTYPE
#undef HOST_MASK

#define MTYPE …
#define HOST_MASK …

#define IP_SET_EMIT_CREATE
#include "ip_set_hash_gen.h"

static int
hash_ip6_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_ip6_uadt(struct ip_set *set, struct nlattr *tb[],
	      enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
{ … }

static struct ip_set_type hash_ip_type __read_mostly = …;

static int __init
hash_ip_init(void)
{ … }

static void __exit
hash_ip_fini(void)
{ … }

module_init(…) …;
module_exit(hash_ip_fini);