syncookies.c File Reference

#include <linux/tcp.h>
#include <linux/slab.h>
#include <linux/random.h>
#include <linux/cryptohash.h>
#include <linux/kernel.h>
#include <linux/export.h>
#include <net/tcp.h>
#include <net/route.h>

Go to the source code of this file.

Macros
#define	TSBITS   6
#define	TSMASK   (((__u32)1 << TSBITS) - 1)
#define	COOKIEBITS   24 /* Upper bits store count */
#define	COOKIEMASK   (((__u32)1 << COOKIEBITS) - 1)
#define	COUNTER_TRIES   4

Functions
	EXPORT_SYMBOL (syncookie_secret)
	__initcall (init_syncookies)
__u32	cookie_init_timestamp (struct request_sock *req)
__u32	cookie_v4_init_sequence (struct sock *sk, struct sk_buff *skb, __u16 *mssp)
bool	cookie_check_timestamp (struct tcp_options_received *tcp_opt, bool *ecn_ok)
	EXPORT_SYMBOL (cookie_check_timestamp)
struct sock *	cookie_v4_check (struct sock *sk, struct sk_buff *skb, struct ip_options *opt)

Variables
int	sysctl_tcp_syncookies
__u32	syncookie_secret [2][16-4+SHA_DIGEST_WORDS]

Macro Definition Documentation

#define COOKIEBITS   24 /* Upper bits store count */

Definition at line 38 of file syncookies.c.

#define COOKIEMASK   (((__u32)1 << COOKIEBITS) - 1)

Definition at line 39 of file syncookies.c.

#define COUNTER_TRIES   4

Definition at line 190 of file syncookies.c.

#define TSBITS   6

Definition at line 23 of file syncookies.c.

#define TSMASK   (((__u32)1 << TSBITS) - 1)

Definition at line 24 of file syncookies.c.

Function Documentation

__initcall

(

init_syncookies

)

bool cookie_check_timestamp	(	struct tcp_options_received *	tcp_opt,
		bool *	ecn_ok
	)

Definition at line 235 of file syncookies.c.

__u32 cookie_init_timestamp

(

struct request_sock *

req

)

Definition at line 67 of file syncookies.c.

struct sock* cookie_v4_check ( struct sock *  sk, struct sk_buff *  skb, struct ip_options *  opt  )

read

Definition at line 265 of file syncookies.c.

__u32 cookie_v4_init_sequence	(	struct sock *	sk,
		struct sk_buff *	skb,
		__u16 *	mssp
	)

Definition at line 163 of file syncookies.c.

EXPORT_SYMBOL

(

syncookie_secret

)

EXPORT_SYMBOL

(

cookie_check_timestamp

)

Variable Documentation

__u32 syncookie_secret[2][16-4+SHA_DIGEST_WORDS]

Definition at line 28 of file syncookies.c.

int sysctl_tcp_syncookies