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| author | Michael Walle <michael@walle.cc> | 2012-06-05 11:33:15 +0000 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2012-07-07 14:07:32 +0200 |
| commit | 99e139d5902e488eb779cd4f00c978f3803c39be (patch) | |
| tree | 44a0e2420003a2c3393b845b091bcc7b2e05a93b /net/link_local.c | |
| parent | 9acf1ca50d8b031511d146f6ffd73201fedce28c (diff) | |
| download | u-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.c | 7 |
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(); |