| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 35 | struct 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 | |
| 45 | extern void rand_initialize_irq(int irq); |
| 46 | |
| 47 | extern void add_input_randomness(unsigned int type, unsigned int code, |
| 48 | unsigned int value); |
| 49 | extern void add_interrupt_randomness(int irq); |
| 50 | |
| 51 | extern void get_random_bytes(void *buf, int nbytes); |
| 52 | void generate_random_uuid(unsigned char uuid_out[16]); |
| 53 | |
| 54 | extern __u32 secure_ip_id(__u32 daddr); |
| 55 | extern u32 secure_tcp_port_ephemeral(__u32 saddr, __u32 daddr, __u16 dport); |
| 56 | extern u32 secure_tcpv6_port_ephemeral(const __u32 *saddr, const __u32 *daddr, |
| 57 | __u16 dport); |
| 58 | extern __u32 secure_tcp_sequence_number(__u32 saddr, __u32 daddr, |
| 59 | __u16 sport, __u16 dport); |
| 60 | extern __u32 secure_tcpv6_sequence_number(__u32 *saddr, __u32 *daddr, |
| 61 | __u16 sport, __u16 dport); |
| 62 | |
| 63 | #ifndef MODULE |
| 64 | extern struct file_operations random_fops, urandom_fops; |
| 65 | #endif |
| 66 | |
| 67 | unsigned int get_random_int(void); |
| 68 | unsigned long randomize_range(unsigned long start, unsigned long end, unsigned long len); |
| 69 | |
| 70 | #endif /* __KERNEL___ */ |
| 71 | |
| 72 | #endif /* _LINUX_RANDOM_H */ |