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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 | |
37 | struct 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 | |
47 | extern void rand_initialize_irq(int irq); |
48 | |
49 | extern void add_input_randomness(unsigned int type, unsigned int code, |
50 | unsigned int value); |
51 | extern void add_interrupt_randomness(int irq); |
52 | |
53 | extern void get_random_bytes(void *buf, int nbytes); |
54 | void generate_random_uuid(unsigned char uuid_out[16]); |
55 | |
56 | extern __u32 secure_ip_id(__be32 daddr); |
57 | extern u32 secure_ipv4_port_ephemeral(__be32 saddr, __be32 daddr, __be16 dport); |
58 | extern u32 secure_ipv6_port_ephemeral(const __be32 *saddr, const __be32 *daddr, |
59 | __be16 dport); |
60 | extern __u32 secure_tcp_sequence_number(__be32 saddr, __be32 daddr, |
61 | __be16 sport, __be16 dport); |
62 | extern __u32 secure_tcpv6_sequence_number(__be32 *saddr, __be32 *daddr, |
63 | __be16 sport, __be16 dport); |
64 | extern u64 secure_dccp_sequence_number(__be32 saddr, __be32 daddr, |
65 | __be16 sport, __be16 dport); |
66 | |
67 | #ifndef MODULE |
68 | extern const struct file_operations random_fops, urandom_fops; |
69 | #endif |
70 | |
71 | unsigned int get_random_int(void); |
72 | unsigned long randomize_range(unsigned long start, unsigned long end, unsigned long len); |
73 | |
74 | u32 random32(void); |
75 | void srandom32(u32 seed); |
76 | |
77 | #endif /* __KERNEL___ */ |
78 | |
79 | #endif /* _LINUX_RANDOM_H */ |
80 |
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