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_ipv4_port_ephemeral(__u32 saddr, __u32 daddr, __u16 dport); 56 extern u32 secure_ipv6_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 extern u64 secure_dccp_sequence_number(__u32 saddr, __u32 daddr, 63 __u16 sport, __u16 dport); 64 65 #ifndef MODULE 66 extern struct file_operations random_fops, urandom_fops; 67 #endif 68 69 unsigned int get_random_int(void); 70 unsigned long randomize_range(unsigned long start, unsigned long end, unsigned long len); 71 72 #endif /* __KERNEL___ */ 73 74 #endif /* _LINUX_RANDOM_H */ 75
