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| author | Joe Hershberger <joe.hershberger@ni.com> | 2012-05-23 07:57:58 +0000 |
|---|---|---|
| committer | Joe Hershberger <joe.hershberger@ni.com> | 2012-05-23 14:19:22 -0500 |
| commit | eafc8db0e35275330f43a4cf7b7ae8aba71c9728 (patch) | |
| tree | 0f76700afacfdeab0feafbd787e32d347083a0fd /net/bootp.c | |
| parent | 806150063a6b98d7e757bd9f640af1755bb387fd (diff) | |
| download | u-boot-imx-eafc8db0e35275330f43a4cf7b7ae8aba71c9728.zip u-boot-imx-eafc8db0e35275330f43a4cf7b7ae8aba71c9728.tar.gz u-boot-imx-eafc8db0e35275330f43a4cf7b7ae8aba71c9728.tar.bz2 | |
net: Move MAC-seeded rand out of bootp.c
Make the MAC-seeded random number generator available to /net in
general. MAC-seeded rand will be needed by link-local as well, so
give it an interface.
Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'net/bootp.c')
| -rw-r--r-- | net/bootp.c | 67 |
1 files changed, 12 insertions, 55 deletions
diff --git a/net/bootp.c b/net/bootp.c index d0a7da2..0185e56 100644 --- a/net/bootp.c +++ b/net/bootp.c @@ -12,6 +12,7 @@ #include <command.h> #include <net.h> #include "bootp.h" +#include "net_rand.h" #include "tftp.h" #include "nfs.h" #ifdef CONFIG_STATUS_LED @@ -37,9 +38,6 @@ ulong BootpID; int BootpTry; -#ifdef CONFIG_BOOTP_RANDOM_DELAY -ulong seed1, seed2; -#endif #if defined(CONFIG_CMD_DHCP) dhcp_state_t dhcp_state = INIT; @@ -584,6 +582,9 @@ BootpRequest(void) uchar *pkt, *iphdr; struct Bootp_t *bp; int ext_len, pktlen, iplen; +#ifdef CONFIG_BOOTP_RANDOM_DELAY + ulong i, rand_ms; +#endif bootstage_mark_name(BOOTSTAGE_ID_BOOTP_START, "bootp_start"); #if defined(CONFIG_CMD_DHCP) @@ -591,60 +592,16 @@ BootpRequest(void) #endif #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */ - unsigned char bi_enetaddr[6]; - int reg; - ulong tst1, tst2, sum, m_mask, m_value = 0; - - if (BootpTry == 0) { - /* get our mac */ - eth_getenv_enetaddr("ethaddr", bi_enetaddr); - - debug("BootpRequest => Our Mac: "); - for (reg = 0; reg < 6; reg++) - debug("%x%c", bi_enetaddr[reg], reg == 5 ? '\n' : ':'); - - /* Mac-Manipulation 2 get seed1 */ - tst1 = 0; - tst2 = 0; - for (reg = 2; reg < 6; reg++) { - tst1 = tst1 << 8; - tst1 = tst1 | bi_enetaddr[reg]; - } - for (reg = 0; reg < 2; reg++) { - tst2 = tst2 | bi_enetaddr[reg]; - tst2 = tst2 << 8; - } + if (BootpTry == 0) + srand_mac(); - seed1 = tst1^tst2; - - /* Mirror seed1*/ - m_mask = 0x1; - for (reg = 1; reg <= 32; reg++) { - m_value |= (m_mask & seed1); - seed1 = seed1 >> 1; - m_value = m_value << 1; - } - seed1 = m_value; - seed2 = 0xB78D0945; - } - - /* Random Number Generator */ - for (reg = 0; reg <= 0; reg++) { - sum = seed1 + seed2; - if (sum < seed1 || sum < seed2) - sum++; - seed2 = seed1; - seed1 = sum; - - if (BootpTry <= 2) { /* Start with max 1024 * 1ms */ - sum = sum >> (22-BootpTry); - } else { /*After 3rd BOOTP request max 8192 * 1ms */ - sum = sum >> 19; - } - } + if (BootpTry <= 2) /* Start with max 1024 * 1ms */ + rand_ms = rand() >> (22 - BootpTry); + else /* After 3rd BOOTP request max 8192 * 1ms */ + rand_ms = rand() >> 19; - printf("Random delay: %ld ms...\n", sum); - for (reg = 0; reg < sum; reg++) + printf("Random delay: %ld ms...\n", rand_ms); + for (i = 0; i < rand_ms; i++) udelay(1000); /*Wait 1ms*/ #endif /* CONFIG_BOOTP_RANDOM_DELAY */ |