net: make net_random_ethaddr() more random
The net_random_ethaddr() tries to get some entropy from different
startup times of a board. The seed is initialized with get_timer() which
has only a granularity of milliseconds. We can do better if we use
get_ticks() which returns the raw timer ticks. Using this we have a
higher chance of getting different values at startup.
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/include/net.h b/include/net.h
index a54d5ee..75a16e4 100644
--- a/include/net.h
+++ b/include/net.h
@@ -816,7 +816,7 @@
static inline void net_random_ethaddr(uchar *addr)
{
int i;
- unsigned int seed = get_timer(0);
+ unsigned int seed = get_ticks();
for (i = 0; i < 6; i++)
addr[i] = rand_r(&seed);