xt_hashlimit.c File Reference

#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/random.h>
#include <linux/jhash.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/list.h>
#include <linux/skbuff.h>
#include <linux/mm.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#include <linux/netfilter_ipv6/ip6_tables.h>
#include <linux/netfilter/xt_hashlimit.h>
#include <linux/mutex.h>

Go to the source code of this file.

Data Structures
struct	hashlimit_net
struct	dsthash_dst
struct	dsthash_ent
struct	xt_hashlimit_htable

Macros
#define	pr_fmt(fmt)   KBUILD_MODNAME ": " fmt
#define	MAX_CPJ   (0xFFFFFFFF / (HZ*60*60*24))
#define	_POW2_BELOW2(x)   ((x)|((x)>>1))
#define	_POW2_BELOW4(x)   (_POW2_BELOW2(x)|_POW2_BELOW2((x)>>2))
#define	_POW2_BELOW8(x)   (_POW2_BELOW4(x)|_POW2_BELOW4((x)>>4))
#define	_POW2_BELOW16(x)   (_POW2_BELOW8(x)|_POW2_BELOW8((x)>>8))
#define	_POW2_BELOW32(x)   (_POW2_BELOW16(x)|_POW2_BELOW16((x)>>16))
#define	POW2_BELOW32(x)   ((_POW2_BELOW32(x)>>1) + 1)
#define	CREDITS_PER_JIFFY   POW2_BELOW32(MAX_CPJ)
#define	MAX_CPJ_BYTES   (0xFFFFFFFF / HZ)
#define	CREDITS_PER_JIFFY_BYTES   POW2_BELOW32(MAX_CPJ_BYTES)

Functions
	MODULE_LICENSE ("GPL")
	MODULE_AUTHOR ("Harald Welte <[email protected]>")
	MODULE_AUTHOR ("Jan Engelhardt <[email protected]>")
	MODULE_DESCRIPTION ("Xtables: per hash-bucket rate-limit match")
	MODULE_ALIAS ("ipt_hashlimit")
	MODULE_ALIAS ("ip6t_hashlimit")
	module_init (hashlimit_mt_init)
	module_exit (hashlimit_mt_exit)

Macro Definition Documentation

#define _POW2_BELOW16

(

x

)

(_POW2_BELOW8(x)|_POW2_BELOW8((x)>>8))

Definition at line 384 of file xt_hashlimit.c.

#define _POW2_BELOW2

(

x

)

((x)|((x)>>1))

Definition at line 381 of file xt_hashlimit.c.

#define _POW2_BELOW32

(

x

)

(_POW2_BELOW16(x)|_POW2_BELOW16((x)>>16))

Definition at line 385 of file xt_hashlimit.c.

#define _POW2_BELOW4

(

x

)

(_POW2_BELOW2(x)|_POW2_BELOW2((x)>>2))

Definition at line 382 of file xt_hashlimit.c.

#define _POW2_BELOW8

(

x

)

(_POW2_BELOW4(x)|_POW2_BELOW4((x)>>4))

Definition at line 383 of file xt_hashlimit.c.

#define CREDITS_PER_JIFFY   POW2_BELOW32(MAX_CPJ)

Definition at line 388 of file xt_hashlimit.c.

#define CREDITS_PER_JIFFY_BYTES   POW2_BELOW32(MAX_CPJ_BYTES)

Definition at line 395 of file xt_hashlimit.c.

#define MAX_CPJ   (0xFFFFFFFF / (HZ*60*60*24))

Definition at line 376 of file xt_hashlimit.c.

#define MAX_CPJ_BYTES   (0xFFFFFFFF / HZ)

Definition at line 394 of file xt_hashlimit.c.

#define POW2_BELOW32

(

x

)

((_POW2_BELOW32(x)>>1) + 1)

Definition at line 386 of file xt_hashlimit.c.

#define pr_fmt

(

fmt

)

KBUILD_MODNAME ": " fmt

Definition at line 10 of file xt_hashlimit.c.

Function Documentation

MODULE_ALIAS

(

"ipt_hashlimit"

)

MODULE_ALIAS

(

"ip6t_hashlimit"

)

MODULE_AUTHOR

(

"Harald Welte <[email protected]>"

)

MODULE_AUTHOR

(

"Jan Engelhardt <[email protected]>"

)

MODULE_DESCRIPTION

(

"Xtables: per hash-bucket rate-limit match"

)

module_exit

(

hashlimit_mt_exit

)

module_init

(

hashlimit_mt_init

)

MODULE_LICENSE

(

"GPL"

)