Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * include/linux/random.h
3 *
4 * Include file for the random number generator.
5 */
6
7#ifndef _LINUX_RANDOM_H
8#define _LINUX_RANDOM_H
9
10#include <linux/types.h>
11#include <linux/ioctl.h>
12#include <linux/irqnr.h>
13
14/* ioctl()'s for the random number generator */
15
16/* Get the entropy count. */
17#define RNDGETENTCNT _IOR( 'R', 0x00, int )
18
19/* Add to (or subtract from) the entropy count. (Superuser only.) */
20#define RNDADDTOENTCNT _IOW( 'R', 0x01, int )
21
22/* Get the contents of the entropy pool. (Superuser only.) */
23#define RNDGETPOOL _IOR( 'R', 0x02, int [2] )
24
25/*
26 * Write bytes into the entropy pool and add to the entropy count.
27 * (Superuser only.)
28 */
29#define RNDADDENTROPY _IOW( 'R', 0x03, int [2] )
30
31/* Clear entropy count to 0. (Superuser only.) */
32#define RNDZAPENTCNT _IO( 'R', 0x04 )
33
34/* Clear the entropy pool and associated counters. (Superuser only.) */
35#define RNDCLEARPOOL _IO( 'R', 0x06 )
36
37struct rand_pool_info {
38 int entropy_count;
39 int buf_size;
40 __u32 buf[0];
41};
42
43/* Exported functions */
44
45#ifdef __KERNEL__
46
47extern void rand_initialize_irq(int irq);
48
49extern void add_input_randomness(unsigned int type, unsigned int code,
50 unsigned int value);
51extern void add_interrupt_randomness(int irq);
52
53extern void get_random_bytes(void *buf, int nbytes);
54void generate_random_uuid(unsigned char uuid_out[16]);
55
56extern __u32 secure_ip_id(__be32 daddr);
57extern u32 secure_ipv4_port_ephemeral(__be32 saddr, __be32 daddr, __be16 dport);
58extern u32 secure_ipv6_port_ephemeral(const __be32 *saddr, const __be32 *daddr,
59 __be16 dport);
60extern __u32 secure_tcp_sequence_number(__be32 saddr, __be32 daddr,
61 __be16 sport, __be16 dport);
62extern __u32 secure_tcpv6_sequence_number(__be32 *saddr, __be32 *daddr,
63 __be16 sport, __be16 dport);
64extern u64 secure_dccp_sequence_number(__be32 saddr, __be32 daddr,
65 __be16 sport, __be16 dport);
66
67#ifndef MODULE
68extern const struct file_operations random_fops, urandom_fops;
69#endif
70
71unsigned int get_random_int(void);
72unsigned long randomize_range(unsigned long start, unsigned long end, unsigned long len);
73
74u32 random32(void);
75void srandom32(u32 seed);
76
77#endif /* __KERNEL___ */
78
79#endif /* _LINUX_RANDOM_H */