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(void); 46 extern void rand_initialize_irq(int irq); 47 extern void rand_initialize_blkdev(int irq, int mode); 48 49 extern void batch_entropy_store(u32 a, u32 b, int num); 50 51 extern void add_keyboard_randomness(unsigned char scancode); 52 extern void add_mouse_randomness(__u32 mouse_data); 53 extern void add_interrupt_randomness(int irq); 54 extern void add_blkdev_randomness(int major); 55 56 extern void get_random_bytes(void *buf, int nbytes); 57 void generate_random_uuid(unsigned char uuid_out[16]); 58 59 extern __u32 secure_ip_id(__u32 daddr); 60 extern __u32 secure_tcp_sequence_number(__u32 saddr, __u32 daddr, 61 __u16 sport, __u16 dport); 62 extern __u32 secure_tcp_syn_cookie(__u32 saddr, __u32 daddr, 63 __u16 sport, __u16 dport, 64 __u32 sseq, __u32 count, 65 __u32 data); 66 extern __u32 check_tcp_syn_cookie(__u32 cookie, __u32 saddr, 67 __u32 daddr, __u16 sport, 68 __u16 dport, __u32 sseq, 69 __u32 count, __u32 maxdiff); 70 extern __u32 secure_tcpv6_sequence_number(__u32 *saddr, __u32 *daddr, 71 __u16 sport, __u16 dport); 72 73 extern __u32 secure_ipv6_id(__u32 *daddr); 74 75 #ifndef MODULE 76 extern struct file_operations random_fops, urandom_fops; 77 #endif 78 79 #endif /* __KERNEL___ */ 80 81 #endif /* _LINUX_RANDOM_H */ 82