summaryrefslogtreecommitdiff
path: root/net/link_local.c
diff options
context:
space:
mode:
authorMichael Walle <michael@walle.cc>2012-06-05 11:33:15 +0000
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2012-07-07 14:07:32 +0200
commit99e139d5902e488eb779cd4f00c978f3803c39be (patch)
tree44a0e2420003a2c3393b845b091bcc7b2e05a93b /net/link_local.c
parent9acf1ca50d8b031511d146f6ffd73201fedce28c (diff)
downloadu-boot-imx-99e139d5902e488eb779cd4f00c978f3803c39be.zip
u-boot-imx-99e139d5902e488eb779cd4f00c978f3803c39be.tar.gz
u-boot-imx-99e139d5902e488eb779cd4f00c978f3803c39be.tar.bz2
net: use common rand()/srand() functions
Replace rand() with the functions from lib/. The link-local network code stores its own seed, derived from the MAC address. Thus making it independent from calls to srand() in other modules. Signed-off-by: Michael Walle <michael@walle.cc> Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Diffstat (limited to 'net/link_local.c')
-rw-r--r--net/link_local.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/net/link_local.c b/net/link_local.c
index 3362863..582d011 100644
--- a/net/link_local.c
+++ b/net/link_local.c
@@ -56,6 +56,7 @@ static unsigned conflicts;
static unsigned nprobes;
static unsigned nclaims;
static int ready;
+static unsigned int seed;
static void link_local_timeout(void);
@@ -68,7 +69,7 @@ static IPaddr_t pick(void)
unsigned tmp;
do {
- tmp = rand() & IN_CLASSB_HOST;
+ tmp = rand_r(&seed) & IN_CLASSB_HOST;
} while (tmp > (IN_CLASSB_HOST - 0x0200));
return (IPaddr_t) htonl((LINKLOCAL_ADDR + 0x0100) + tmp);
}
@@ -78,7 +79,7 @@ static IPaddr_t pick(void)
*/
static inline unsigned random_delay_ms(unsigned secs)
{
- return rand() % (secs * 1000);
+ return rand_r(&seed) % (secs * 1000);
}
static void configure_wait(void)
@@ -109,7 +110,7 @@ void link_local_start(void)
}
NetOurSubnetMask = IN_CLASSB_NET;
- srand_mac();
+ seed = seed_mac();
if (ip == 0)
ip = pick();