mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-25 03:18:51 +09:00
![Jimmy Du](/assets/img/avatar_default.png)
Previously seeded by obtaining mac addr from env. If mac addr was never set, rand would output 0. This fix obtains the mac addr from driver instead. Signed-off-by: Jimmy Du <jimmy.du@ni.com> Acked-by: Joe Hershberger <joe.hershberger@ni.com>
44 lines
774 B
C
44 lines
774 B
C
/*
|
|
* Copied from LiMon - BOOTP.
|
|
*
|
|
* Copyright 1994, 1995, 2000 Neil Russell.
|
|
* (See License)
|
|
* Copyright 2000 Paolo Scaffardi
|
|
*/
|
|
|
|
#ifndef __NET_RAND_H__
|
|
#define __NET_RAND_H__
|
|
|
|
#include <common.h>
|
|
|
|
/*
|
|
* Return a seed for the PRNG derived from the eth0 MAC address.
|
|
*/
|
|
static inline unsigned int seed_mac(void)
|
|
{
|
|
unsigned char enetaddr[ARP_HLEN];
|
|
unsigned int seed;
|
|
|
|
/* get our mac */
|
|
memcpy(enetaddr, eth_get_ethaddr(), ARP_HLEN);
|
|
|
|
seed = enetaddr[5];
|
|
seed ^= enetaddr[4] << 8;
|
|
seed ^= enetaddr[3] << 16;
|
|
seed ^= enetaddr[2] << 24;
|
|
seed ^= enetaddr[1];
|
|
seed ^= enetaddr[0] << 8;
|
|
|
|
return seed;
|
|
}
|
|
|
|
/*
|
|
* Seed the random number generator using the eth0 MAC address.
|
|
*/
|
|
static inline void srand_mac(void)
|
|
{
|
|
srand(seed_mac());
|
|
}
|
|
|
|
#endif /* __NET_RAND_H__ */
|