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