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