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/*

 * include/linux/random.h

 *

 * Include file for the random number generator.

 */

#ifndef _LINUX_RANDOM_H

#define _LINUX_RANDOM_H

#include <linux/ioctl.h>

/* ioctl()'s for the random number generator */

/* Get the entropy count. */

#define RNDGETENTCNT    _IOR( 'R', 0x00, int )

/* Add to (or subtract from) the entropy count.  (Superuser only.) */

#define RNDADDTOENTCNT  _IOW( 'R', 0x01, int )

/* Get the contents of the entropy pool.  (Superuser only.) */

#define RNDGETPOOL      _IOR( 'R', 0x02, int [2] )

/*

 * Write bytes into the entropy pool and add to the entropy count.

 * (Superuser only.)

 */

#define RNDADDENTROPY   _IOW( 'R', 0x03, int [2] )

/* Clear entropy count to 0.  (Superuser only.) */

#define RNDZAPENTCNT    _IO( 'R', 0x04 )

/* Clear the entropy pool and associated counters.  (Superuser only.) */

#define RNDCLEARPOOL    _IO( 'R', 0x06 )

struct rand_pool_info {

        int     entropy_count;

        int     buf_size;

        __u32   buf[0];

};

/* Exported functions */

#ifdef __KERNEL__

extern void rand_initialize(void);

extern void rand_initialize_irq(int irq);

extern void rand_initialize_blkdev(int irq, int mode);

extern void add_keyboard_randomness(unsigned char scancode);

extern void add_mouse_randomness(__u32 mouse_data);

extern void add_interrupt_randomness(int irq);

extern void add_blkdev_randomness(int major);

extern void get_random_bytes(void *buf, int nbytes);

extern __u32 secure_tcp_sequence_number(__u32 saddr, __u32 daddr,

                                        __u16 sport, __u16 dport);

__u32 secure_tcp_probe_number(__u32 saddr, __u32 daddr,

                 __u16 sport, __u16 dport, __u32 sseq, int validate);

__u32 secure_tcp_syn_cookie(__u32 saddr, __u32 daddr,

                 __u16 sport, __u16 dport, __u32 sseq, __u32 count);

#ifndef MODULE

extern struct file_operations random_fops, urandom_fops;

#endif

#endif /* __KERNEL___ */

#endif /* _LINUX_RANDOM_H */