From 99e139d5902e488eb779cd4f00c978f3803c39be Mon Sep 17 00:00:00 2001 From: Michael Walle Date: Tue, 5 Jun 2012 11:33:15 +0000 Subject: 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 Acked-by: Joe Hershberger --- net/link_local.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'net/link_local.c') diff --git a/net/link_local.c b/net/link_local.c index 336286395b..582d0115b7 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(); -- cgit v1.2.1